Operation and Maintenance Instructions

Vacuum plasma welding box

BAOJI JL CLAD METALS MATERIALS CO.,LTD

April 2024

Contents

1. Operating instructions

2. Safety regulations for plasma welding boxes

3. Plasma welding box repair, maintenance, maintenance procedures

4. Electrical schematic diagram

5. Mechanical master drawings and wearing parts drawings

6. List of sealing rings

 

Equipment operation precautions :

►Total power closing

►External circulating water pressure greater than 0.1Mpa

►Pure water pressure greater than 0.2Mpa

►Argon pipeline pressure greater than 0.4Mpa

►Start the host computer and automatically start the host computer screen.

►Load and discharge the furnace (check the welding gun head, clean the furnace, and clean the glass of the observation hole)

►Close the front and rear furnace doors and lock them tightly

►Vacuum, fill with argon (argon low limit 18000-20000, high limit 50000-60000, vacuum leak detection less than 1pa/min)

►Set the material data management process parameters (electrode diameter, electrode length, number of longitudinal welds, length of horizontal welds, gun lift height after arc start, rotation speed, longitudinal return speed, transverse return speed) and select the current use process.

►In the process settings, set the longitudinal welding process (weld angle, welding current, longitudinal speed, transverse distance) and the horizontal welding process (weld angle, welding current, transverse speed).

►Check whether the process number and diameter are consistent with the process requirements on the upper computer

►Check whether there is an alarm signal (all servos are powered on, after the welding torch power is closed, the cooling water and argon pressure are normal)

►The working condition screen sets the argon flow rate and arc starting distance (the arc starting distance is generally 15-25mm, the current is 200A, and the argon flow rate is 25-28L/min)

►When closing the furnace door, see that the material rack is adjusted to the level and centered.

►Check the rotating position, moving position and transverse position of the material rack to be cleared

►Ready to start automatic welding

►After the welding of the 3# gun is completed, see if the gun is automatically lifted. If not, stop the automatic welding to prevent the gun from colliding.

►All guns must be at the upper limit to rotate and load

Operating instructions

1. Equipment introduction:

This electrical control system is a horizontal fixed gun vacuum plasma welding box supporting equipment. The system will be responsible for completing the automatic control of the entire welding process and the normal operation of the electrical system. It is mainly composed of welding machine power supply, AC servo system, PLC control, detection and control part and power distribution part.

2. Operating instructions

1. Prepare the equipment before use:

Water, electricity, and gas (compressed air, argon) are ready. (1).Water: pure water, external circulation water

The water level of the pure water tank is guaranteed to be at the upper limit of the water level, and the pressure after the pure water is started is greater than 0.8 MPa.

The external circulation water pipeline valve must be opened, and the water pressure is greater than 0.2 MPa.

(2).Electricity: After the total power supply is closed, the operating room control cabinet shows the voltage of 380V.

(3).Gas: compressed air, argon

Open the compressed air main valve, the pressure is greater than 0.6MPa.

Open the argon main valve, the pressure is greater than 0.4MPa.

Adjust the argon pressure for welding torch at 0.2 MPa.

2. Vacuum system

Before vacuuming: The material truck must be in the furnace, and the front and rear furnace doors must be locked.

The operation sequence of the vacuum system, the opening and valve position are all carried out according to the schematic diagram of the "Vacuum System" on the upper monitoring screen.

★ Click the button of the vacuum pump and valve in the "Vacuum System" screen.

Start the vacuum system: start the 1#, 2#, 3#, 4#

mechanical pumps first, open the 1#, 2#, 3#, 4# mechanical pump front valves after 10 seconds, and then open the 1# large valve and 2 # large valve to evacuate the furnace body. When the vacuum degree reaches 1500 Pa, start the 1#, 2# 1200 Roots pump. When the vacuum degree reaches 800 Pa, start the 3#, 4# 2500 Roots pump to start evacuating. When the vacuum reaches 5 Pa, start closing the vacuum system.

Turn off the vacuum system: When the vacuum shows 5pa, turn off the vacuum system in the opposite direction (first close the 1#large valve and the 2# large valve to evacuate the furnace body, 3#, 4# 2500 Roots pump, 1#, 2# 1200 Roots, pump, turn off the 1#, 2#, 3#, 4#mechanical pump at intervals of 2 minutes)

After the electrode weld is cooled at the end of the welding, the bleed system before the furnace is turned on by the bleed (switch) to break the air.

★ Leak test function: Before starting leak test, the device must be evacuated. Use leak test press button to perform a leak detection operation on the device.

Clicking the leak test button with the mouse will launch the following program.

(1).Close the 1# and 2# vacuum valves.

(2).Delay for 10 minutes and start the timing test for 10 minutes.

(3).Track the leak rate according to the following formula. Air leakage rate = (P2-P1)/10 [Pa/min]

where: P1 = pressure after closing the valve for 1 minute P2 = pressure after 10 minutes

Click the End Leak Test button to cancel the leak test procedure.

3. Charge Ar， pressure relief system program control

When the vacuum in the furnace chamber reaches 5-10Pa, allow argon to be filled and ready for welding. At this time, the furnace is stopped in sequence, the body valve, the Roots pump, and the mechanical pump, and then the argon gas is filled into the furnace until the pressure in the furnace chamber reaches 30000Pa~ 60000Pa. The execution of the argon filling action is completed by the argon filling button on the display or the

console is selected to the front of the furnace, and the button of the furnace door operation box can be completed.

The automatic pressure relief system refers to the action taken by the pressure expansion of the furnace chamber due to the welding work during the welding process. That is, when the furnace chamber pressure is higher than 60000Pa, the automatic pressure relief is automatically completed through the electric valve of the pressure relief pipe.

4. Welding process ·

4.1. Preparation before welding

★ Open the intake valve of the welding torch, and adjust the intake pressure (0.2 MPa) with three argon valves of the welding torch. Then check whether the gas path works normally, set three on the upper display, and set the argon flow rate of the welding torch to 5-20L/min.

★ Press the total power supply of the pure water cooler on the control cabinet in the operation room, and then start any water pump on the control cabinet of the pure water cooler to check whether the pure water pressure water flow is normal (the upper computer water, the system screen shows normal, and the indicator light is green to indicate normal).

★ After the water and gas circuits are normal, select the welding status of the three guns (automatic welding) on the console, and then press the welding machine power closing button in the console cabinet.

★ On the "Process Settings" screen of the upper monitoring screen, set the specifications of the electrodes to be welded, set the number of welding processes, and the welding angle of the welding machine current. The welding process generally requires at least 4 welds, and the number of welds is generally a multiple of 4 to increase the weld. For example, angle setting: 0 degrees start -180 degrees -270 degrees -90 degrees. Set the welding current of each gun. Welding process, after the setting is completed, click Modify Complete, and then choose to use that curve.

★ Welding automatic, manual selection, furnace front, console selection. First select the operation selection knob, select the console, then select to connect the three welding gun control knobs, and point the automatic manual selection knob to automatic. Finally, confirm on the "Working Condition Map" screen that when the left limit of the screen is red, the selected process number is correct, and then click the automatic start button.

4.2. Manual welding in front of the furnace

Select Front Furnace, Manual Mode Welding on the console panel. Then start welding in the front of the furnace operation box. Front of the furnace manual welding allows only one gun to work at a time.

Take the 1 #operation box as an example to describe the operation process.

★ The 1# operation box in front of the furnace is connected.

★ Turn on the 1# welding power supply in front of the furnace, and then set the welding current with the potentiometer in front of the furnace.

★ Then press the arc start button to prepare for arc start.

★ The given welding current is adjusted by the potentiometer. The welding arc distance control is realized by the AC servo motor and the matching AC servo controller, and the arc distance is controlled at about 20--40mm.

★ The movement and rotation of the trolley are realized by the AC servo motor and the matching AC servo controller. The stop of movement and rotation is realized by the movement stop button and the rotation stop button.

★ When the welding is over, press the stop arc button to end the welding.

★ 2#, 3# operation box welding process, such as 1# operation box welding process.

4.3. Console welding

The welding process of the console must be worked with the assistance of the camera system. Three guns are allowed to work simultaneously at the same time. The operation process is the same as the welding in front of the furnace and will not be described here.

4.4. Automatic welding

First of all, in the "Process Settings" screen monitored by the upper level, the correct input electrode diameter, length, welding return speed (300-3000mm/min), automatic welding start after welding gun lift, time (4-15 seconds to choose), rotation speed (5-30 angles/second), welding current of each gun, welding speed (70-200mm/min), rotation angle, number of welds (4-20).

Confirm the process data, select the number of process strips, and then enter the "Working Condition Diagram" screen to start the automatic welding and monitor the welding data. The argon flow rate (usually 15-20L/M) at the time of welding must be set in advance. During automatic welding, the welding torch will automatically touch the bottom and lift the distance (the minimum arc starting distance should not be less than 12-40mm). The welding current, argon flow rate, and the automatic welding process can be modified at any time according to the welding situation. The welding voltage is determined by the distance between the gun head and the material. Automatic welding can adjust the welding voltage through the manual cross switch. After the automatic welding process is completed, the welding torch is automatically raised to the upper limit, and the material cart returns to the starting position.

If any welding torch starts the arc unsuccessfully during the automatic welding process, the arc can be manually started again through the single gun start button, and the arc starting.

distance can be adjusted manually when the arc is manually started. Lift the welding torch until the arc is started.

5. Blackout and Precautions

When the furnace is shut down, the power supply is cut off, and the water and gas are turned off.

When the machine is stopped for welding, the trolley in the furnace should be placed in the furnace, and the furnace chamber should be pumped to 10 Pa to maintain a vacuum in the furnace and seal the furnace.

6. Trolley movement, loading and discharging control and furnace door operation

The longitudinal movement, lateral movement and rotation of the trolley are realized by three AC servo motors and matching AC servo controllers. The loading and discharging and furnace door control are completed by the furnace front operation box.

The longitudinal movement of the trolley is driven by an AC servo motor, and the lateral movement of the trolley is driven by 1 AC servo motor drives the work, and the trolley rotates to 1 AC servo motor drives the work.

7. Out of the furnace

① After welding is stopped, it can be deflated after cooling for about 1 hour.

② Select the operation table to hit the front of the furnace, and press the empty button in the furnace door operation box to be pressed. After the force is balanced, the furnace door can

be opened, and the moving trolley in the furnace should touch the furnace stroke switch.

③ Move the moving trolley in the furnace to the outside of the furnace.

④ Lift the electrodes to a special unloading table with a clamp to remove the electrodes.

⑤ Clean the fixture, moving trolley in the furnace, furnace body and wipe the observation window glass in the furnace, and prepare the next electrode for welding.

3. The upper monitoring system:

The host computer completes the operation of the vacuum system, the monitoring of the water system, and the monitoring of automatic manual welding.

★ The working condition diagram displays the vacuum degree, welding current, welding voltage during the whole welding process in real time.

Welding speed, welding argon flow and other important parameters,

The process settings mainly input the parameters required for automatic welding.

The system trend completes the trend chart display and analysis of important process parameters.

The alarm display records and reports any malfunctions that occur during the operation of the system in real time to alert the operator.

4. System maintenance:

The plasma welding box system is mainly based on electronic devices, and the following aspects should be paid attention to in daily operation;

1. Pay attention to keep the cabinet clean and clean up the dust in the cabinet in a timely manner.

2. Pay attention to maintaining good ventilation in the cabinet, so that the temperature in the cabinet is kept at room temperature, and the maximum temperature is below 45 degrees Celsius.

3. Handling of system failures (inoperable);

(1).Whether the PLC and servo system indicator lights in the system are abnormal, if the system is abnormal, power-off reset, or individual reset.

(2).Check whether the system control power supply (380VAC, 220VAC, 24VDC, etc.) is normal.

(3).The power supply and main power supply of the control subsystem should be checked.

(4).Condition input of the control components of the sub-system (the status of the input components can be judged by the input indicator light of the PLC or the indicator light of the small relay).

(5).The output of the actuator of the sub-system is not available (the status of the output component can be judged by the indicator light of the PLC or the indicator light of the small relay).

(6).Whether there is any abnormality in the small relay of the control part (the condition of the components can be determined by the indicator light and touchpoint action is judged).

(7).Whether there is any abnormality in the air opening and contactor.

(8).Check whether the system is in the original position when the system cannot operate. Each limit switch is close to switches, photoelectric switches, etc. are not abnormal.

(9).Whether the servo system has any abnormalities or alarms.

(10).After welding, wipe the exposed parts of the gun head and gun body with a clean cloth.

4. When making any changes to the system, you should read the drawings carefully to ensure that the system power supply is correct.

Overall, the problems in maintenance are diverse, and we cannot summarize them one by one here. Therefore, we hope that maintenance personnel will pay more attention to observation and accumulate maintenance knowledge in future maintenance, so that equipment can better serve production.

5. Things to be confirmed before shutdown

5.1. When the machine is stopped for welding, the trolley in the furnace should be placed in the furnace, and the furnace

chamber should be pumped to 5 Pa to maintain a vacuum in the furnace and seal the furnace.

5.2. Turn off electricity, water and gas when the furnace is shut down. The power switch on the welder must be turned off when welding is not performed.

6. Replace the welding gun head outside the furnace

(1).Hit the operation knob to the front of the furnace to operate.

(2).Raise the gun to the upper limit position in the operation box, then close the flapper valve and remove the link bolt.Manually open the air release valve of the real gun change to break the air, and then the gun is lifted to the gun change limit before the gun head can be replaced.

(3).After the gun head is installed, lower the gun to the upper limit, close the manual bleed valve, open the welding torch, evacuate the knob for about 1 minute, then close the evacuation valve, open the flapper valve, manually lower the welding torch, and end the welding torch.

l Change the gun head during the automatic welding process

1. When in the automatic welding state, you must click Self in the "Working Condition Picture" surface in the arc-starting state

When the action is suspended, it is necessary to ensure that other buttons cannot be moved.

2. At this time, the console can operate the selection knob.

3. Operate in front of the furnace, disconnect the welding power supply, and turn off the pure water cooler.

4. Raise the gun to the upper limit position in the operation box, then close the flapper valve and remove the link bolt.

Manually open the air release valve of the real gun change to break the air, and then lift the gun to the gun change limit before replacing the gun head.

5. After the gun head is installed, lower the gun to the upper limit, close the manual bleed valve, and open the welding.

The gun evacuates the knob for about 1 minute, then closes the evacuating valve, opens the flapper valve again, manually lowers the torch, and the torch ends.

6. Restore the automatic welding state operation, (select the knob on the console and hit it in front of the console, start Move pure water and turn on the power supply)

8. When clicking the automatic continue button, all operations must return to the normal time of automatic welding state.

Safety regulations for plasma welded boxes

1. The potential risks of the job:

Vacuum plasma welding box is a cooling, mechanical movement, vacuum, and electrical equipment. The main potential hazards are clamping, hitting, and electric shock accidents during mechanical movement. During the welding process, strong arcs will be generated, injuring the eyes, and the front door of the furnace body will be switched on and off to prevent clamping. After the furnace is discharged, the parts are still preheated to prevent burns, secondary operation platforms, and prevent falls.

2. Inspection before work:

1. Check each operation button to see if the clamping device is in normal condition

2. Check the slide valve pump before driving to see if the oil level of the Roots pump is normal

3. Start the spool valve pump and the roots pump to hear whether there is any abnormal sound

4. Whether the water and gas pressure are normal and whether there is any leakage

5. Before starting, check whether the voltage and current are normal and whether they meet the starting requirements

6. Before starting the equipment, it is necessary to clean up the surrounding items that hinder the operation

7. Check whether the cooling device meets the startup requirements

8. Check the vacuum system

9. Check the compressed air and argon-filled system

These inspections are tested by special personnel and completed. Only after all requirements are met can the equipment be powered.

3. Work process control:

1 Production

Risk: affect production operation shutdown, product quality, personnel safety, equipment

quality Control measures

(1).Wear labor protection supplies before going to work. When clearing the furnace, you must wear a hard hat and protection, a mask, and clean gloves or special gloves when installing the furnace.

(2).New employees are not allowed to work without safety education and professional training. Check when installing electrode blocks and jigs. If there are unsafe factors, they are not allowed to be loaded to prevent accidents.

(3).The use of the crane should be operated by a special person designated by the acting monitor. Before lifting, the spreader should be carefully checked. If any safety hazards are found, it is not allowed to be used and must be replaced.

(4).It is strictly forbidden to operate the equipment without the permission of the furnace installer.

(5).Before the moving trolley in the furnace enters and exits the furnace body, it is necessary to check whether there are impurities or other obstructions next to the track.

(6).When the moving trolley in and out of the furnace body and the fixture rotates, the three fixed guns must be at the upper limit to prevent the gun body from being damaged.

(7).Before welding, it is necessary to check the electrode alignment and carefully check the waterway to ensure that the joints are firm and free of leakage.

(8).The circulating water pressure should be controlled at more than 0.4 MPa, and the pressure of the pure water cooler should be controlled at 0.8 to 1 MPa. The cooling water used in the fixed gun must be pure water.

(9).All vacuum pumps and valves must be opened and closed in sequence to prevent damage to the equipment.

(10).The weld must be silver-white. If any abnormalities are found, immediately shut down and report to the relevant personnel for processing.

(11).The flapper valve is only allowed to be closed when the fixed gun is at the upper limit.

(12).Only when the electrode nozzle is removed and the positive electrode head is checked, the detection cylinder is allowed to be opened.

(13).Every time you disassemble the pump or add water again, make sure that the air in the pump chamber is

completely removed before turning on the pump.

(14).You should have a good rest before going to work, and alcohol is prohibited 4 hours before work.

(15).Non-personnel of this equipment are prohibited from starting, operating, or shutting down the equipment without permission.

(16).Equipment operators must follow all safety instructions and warnings on the equipment

(17).After making some adjustments to the equipment, the team must use the shift handover record to hand over the shift at the same time.

(18).Every 30 minutes, a special person will check the water, electricity, gas, etc.

(19).During normal production, there is argon leakage in the equipment. Before entering the equipment, inform other operators in the class and take appropriate protective measures.

3.2 Safety technical regulations for furnace and welding operations

Risks: impact, injury, damage to equipment, welding errors. Control measures:

(1).Carefully verify the electrode size and specifications before installing the furnace.

(2).When using the crane, a special person should gesture and command according to the regulations, and carefully check the reliability of the spreader.

(3).To hoist the electrodes, people must be 3M away from the crane hook, and it is strictly forbidden to walk under the heavy objects under the hook. When the crane is running, they should avoid the running line of the crane.

(4).Before power transmission, the operation of the equipment should be fully checked, including cooling water

flow, pressure and power distribution, vacuum, compressed air, argon, etc. to confirm that it is normal before entering the welding.

(5).If the safety device of the equipment malfunctions, the operator should immediately shut down the equipment.

(6).It is strictly forbidden to use non-professional fixtures for lifting.

3.3 Vacuum, transmission, gas, waterway, safety technical regulations,

Risks: damage to equipment, damage to welding quality

(1).Each vacuum pump valve must adhere to strict operating procedures.

(2).Before each welding, wipe the observation window and camera glass; and check whether the argon and water systems are normal.

(3).Check the insulation of the welding torch and mobile electrodes recently.

4. Site cleaning

Risk: On-site cleanup, affecting the next production operation and product quality

1. Confirm that the switches are restored to zero and turn off the power supply.

After each finished part is processed, wear protective equipment, clean up, and clean up the work site.

3. Check whether the water and gas are turned off.

4. At the end of the welding work, 6S (sorting, rectification, cleaning, cleaning, literacy, safety) must be done well.

Plasma welding box inspection, maintenance, maintenance procedures

Equipment repair, maintenance, and upkeep are crucial to the normal operation of the equipment, prolonging its lifespan, and enhancing its productivity.

1. Maintenance purpose

Periodic or irregular maintenance of the vacuum plasma welding box is carried out to eliminate possible faults and existing faults, and to maintain the lubrication components to maintain good operating conditions.

2. Maintenance content

Serial No.	Check maintenance parts	Check maintenance content	cycle	Responsible person
1	Component connecting wire	reliable connection	monthly	electrician
2	Automatic air switch	whether the automatic disconnection function is normal	each shift	operator
3	AC contactor	whether the suction work is normal	each shift	electrician
4	Stroke switch	whether the switch limit is normal	each shift	operator
5	Three-phase motor grounding	whether grounding resistance is normal	monthly	electrician
6	Slide valve,roots vacuum pump	whether the oil level is normal	each shift	operator
7	Water and pure water cooler	whether water pipeline, and pure water pump are normal	each shift	operator
8	Check whether the argon	whether the argon pipelines are leaking and whether the pressure is normal	each shift	operator
9	Check the furnace	the cylinder locking device	each	operator

	door		shift
10	Check the power connector of the distribution cabinet	whether loose	monthly	operator

3. Inspection and maintenance

1. The oil level of each vacuum pump is at the normal oil level, and the oil circuit is smooth.

2. The temperature rise of each vacuum pump should be within the specified range.

3. Whether there is leakage in the cooling water pipeline and valve, and whether the water circuit temperature detection is normal.

4. Pay attention to whether the pressure of the compressed air reaches the specified range.

5. Pneumatic valves are sensitive and reliable.

6. Check whether the vacuum system and flapper valve are sensitive and reliable every shift.

7. Before welding, check whether the nozzle is damaged and find any abnormalities. Stop using it immediately and replace it.

8. The dust and welding slag in the furnace should be cleaned regularly

9. The observation window and camera lens should be wiped regularly

10. Clean up track debris per furnace

11. The drag chain drive part should ensure that impurities are cleaned every time

12. Regularly check whether the power cord and connector are loose

13. Regularly check whether the vacuum pipeline sealing ring is damaged or leaking

14. When working, you can gently test the motor temperature with the back of your hand to see if it is normal.

4. Maintenance requirements

1. Daily maintenance

① Clean the oil and dust inside and outside the welding box and in the working area.

② Check whether the systems and components of the equipment are in good condition.

③ After the welding of each furnace, the sealing and lubrication of the welding torch should be checked, and the nozzle should be cleaned once.

2. Weekly maintenance

① Check the screw pump, roots pump, hydraulic station oil level, oil quality and waterway working conditions.

② Check the water level and water quality of the high water tank, the working condition of the pump and waterway.

③ Check the condition of the furnace door sealing ring and apply vacuum grease.

④ Clean the track of the feeding car and check the meshing of the gear and sprocket chain of the walking device.

3. Monthly maintenance

Check the filter before the screw pump once.

4. Half-year maintenance

Every six months, the heat exchanger of the pure water circulation system is disassembled and inspected to clean the dirt to ensure its heat exchange efficiency.

5. Maintenance work

Understand the fault phenomenon, prepare the necessary maintenance of electrical tools and wear labor protection equipment, faulty equipments should be powered off and hang no closing signs, in accordance with maintenance requirements for maintenance, inspection, repair and trouble shooting.

6. Maintenance content

(1).Whether the PLC and servo system indicator lights in the system are abnormal, if the system is abnormal, power-off reset or individual reset.

(2).Check whether the system control power supply is normal.

(3).The power supply and main power supply of the control subsystem should be checked.

(4).Condition input of the control components of the sub-system (the status of the input components can be judged by the input indicator light of the PLC or the indicator light of the small relay).

(5).The output of the actuator of the sub-system is not available (the status of the output component can be judged by the indicator light of the PLC or the indicator light of the

small relay).

(6).Whether there is any abnormality in the small relay of the control part (the condition of the components can be judged by the action of the indicator lights and contacts).

(7).Whether there is any abnormality in the air opening and contactor.

(8).Check whether the system is in the original position when the system cannot operate. Limit switches, proximity switches. Photoelectric switches, etc. are abnormal.

(9).Whether the servo system has any abnormalities or alarms.

(10).After welding, wipe the exposed parts of the gun head and gun body with a clean cloth.

(11).If the plasma welding torch does not arc, check whether the argon flow rate is normal and whether the distance between the positive electrode head and the nozzle is appropriate.

(12).If the vacuum degree cannot meet the vacuum requirements, check whether there is any air leakage at each seal step by step, and check whether the vacuum pump is working properly.

(13).The trolley in the furnace cannot be moved, check whether the servo motor and gear reducer work normally, check whether the track in the furnace is stuck, and check whether the trolley chain is damaged.

(14).The rotating device does not work normally, check whether the servo motor works normally, and check whether the coupling is damaged.

Roots pump: add 30# oil

Electrical schematic

Mechanical master drawing and wearing parts drawing

List of sealing rings

Serial No.	Standard number	Specification	Material	Quant ity	Part of use	Spare
1	GB/T3452.1- 2005	φ258（ID）X7	Silicone Rubber	2	250 Baffle Valve and	4
					Furnace
					Chamber
2	GB/T3452.1- 2005	φ258(ID)X5.3	Nitrile rubber	2	250 Baffle valve and	4
					nozzle
3	GB/T3452.1- 2005	φ212(ID)X5.3	Nitrile rubber	4	2500/1200 pump,	8
					exhaust
					port
4	GB/T3452.1- 2005	φ280(OD)X5.7	Nitrile rubber	4	2500/1200 Import	8
5	GB/T3452.1- 2005	φ110(ID)X5.3	Nitrile rubber	8	Bellows and 100 valves	16
6	GB/T3452.1- 2005	φ106(ID)X3.55	Nitrile rubber	4	Tee with bellows	8
7	GB/T3452.1- 2005	φ125(OD)X4	Nitrile rubber	4	100 elbow and 150	8
					pump
8	GB6070.5-85	φ 1940（ID） X12.7	Silicone Rubber	2	100 elbow and 150 pump	4
9	GB/T3452.1- 2005	φ258(ID)X5.3	Silicone Rubber	3	Camera hole	6
10	GB/T3452.1- 2005	φ75(OD)X4	Silicone Rubber	6	Camera hole	12
11	GB/T3452.1- 2005	φ118(ID)X5.3	Silicone Rubber	3	Camera hole	6
12	GB/T3452.1- 2005	φ150(ID)X5.3	Silicone Rubber	6	Observation hole	12
13	GB/T3452.1- 2005	φ210（OD）X6	Silicone Rubber	3	Light hole	6
14	GB/T3452.1- 2005	φ224（ID） X5.3	Silicone Rubber	1	Inlet flange	2
15	GB/T3452.1- 2005	φ27（ID） X3.55	Silicone Rubber	1	Negative electrode input	2
16	GB/T3452.1- 2005	φ55(OD)X3.55	Silicone Rubber	1	Negative electrode	2
					input
17	GB/T3452.1-	φ65(OD)X4	Silicone	1	Negative	2

	2005		Rubber		Electrode input
18	GB/T3452.1- 2005	φ28(ID)X1.8	Nitrile rubber	3	Plasma gun	6
19	GB/T3452.1- 2005	φ42(OD)X4	Nitrile rubber	6	Plasma gun	12
20	GB/T3452.1- 2005	φ175(OD)X4	Nitrile rubber	9	Plasma gun	18
23	GB/T3452.1- 2005	φ155(ID)X3.55	Nitrile rubber	3	Plasma gun	6
24	GB/T3452.1- 2005	φ100(ID)X3	Nitrile rubber	6	Plasma gun	12
25	GB/T3452.1- 2005	φ45(ID)X2.65	Fluorine rubber	6	Plasma gun	12
26	GB/T3452.1- 2005	φ25(ID)X1.8	Fluorine rubber	6	Plasma gun	12
27	GB/T3452.1- 2005	φ 87.5(ID)X2.65	Fluorine rubber	6	Plasma gun	12
28	GB/T3452.1- 2005	φ25 ( I D )X2.65	Fluorine rubber	3	Plasma gun	9
29	GB/T3452.1- 2005	φ60 ( I D )X3.55	Nitrile rubber	3	Plasma gun	9
30	GB/T3452.1- 2005	φ75（ID)X3.55	Nitrile rubber	3	Pressure balance	6
31	GB/T3452.1- 2005	φ55（ID)X3.55	Nitrile rubber	1	Pressure balance	2
32	GB/T3452.1- 2005	φ67（ID)X3.55	Nitrile rubber	1	Pressure balance	2

Spare parts list

Serial No.	Name	Unit	Quantity	Quality
1	Plasma Gun Nozzle	piece	30	Copper Alloy
2	Plasma gun positive electrode head	piece	30	Copper Alloy
3	Argon system seal sleeve	set	1	Fluorine rubber
4	Vacuum system sealsleeve	set	2	Fluorine rubber, replace during maintenance
5	Observation glass	set	18	Jinzhou Quartz Electrical Appliance Factory
6	Water System Seal	set	1

7	Vacuum machinery front pump shaft envelope	set	1	Shanghai
8	vacuum gauge (inficonPCG550)	set	1	Germany
9	Automatic air switch	piece	2
10	AC contactors	piece	2
11	intermediate relays	piece	5
12	push button switches	piece	5
13	travel switches	piece	2

List of technical information provided

Serial No.	Name	Number of copies	Remarks
1	Mechanical drawings of vacuum plasma welding box	3	Delivered to Party A upon final acceptance
2	Foundation conditions Figure	3	Delivery within 20 days after the contract takes effect
3	Positive electrode head	3	Delivered to Party A upon final acceptance
4	Nozzles	3	Delivered to Party A upon final acceptance
5	Vacuum system	3	Delivered to Party A upon final acceptance
6	Electronic control system	3	Delivered to Party A upon final acceptance
7	Operation instruction manual	3	Upon delivery
8	General mechanical drawing, foundation, water, electricity and gas condition drawing	3	Delivery within 20 days after the contract takes effect
9	Outsourced Parts Instructions	1	Upon delivery
10	Equipment certificate	1	Upon delivery
11	Backup CD of application software, source programs, drawings (above materials)	1	Delivered to Party A upon final acceptance