SU1234109A1 - Machine for resistance fusion butt welding - Google Patents

Description

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The invention relates to contact (electric welding) and can be used in resistance welding machines with continuous reflow, as well as reflow with preheating in the case when the preheating and reflow is carried out directly by the operator-welder through a lever drive of manual action.

The aim of the invention is to increase the safety of the operator of the quality of the welded joint and reduce the labor intensity of manufacturing the machine.

The drawing shows the proposed machine.

The machine consists of the following main components: a fixed clamp, a movable clamp 2 for clamping the welding parts, a lanyard 3 for setting the initial distance between the clamps; the device 4 automatically disengaging the movable clamp 2 and the manual lever actuator 5 of preheating and reflowing when the pneumatic actuator 6 is activated. The automatic disengagement device 4 consists of an axially mounted pneumatic cylinder 7 with a housing 8 and a piston 9 with two oppositely directed rods 10 and II and a pneumatic distributor 12. The manual lever actuator 5 of preheating and melting is hinged to the housing 8 of the pneumatic cylinder 7 and consists of three levers 13, 14 and 15. Lever pneumatic actuator 6 precipitation consists of a cylinder 16 precipitation with a working cavity A and a return cavity B and lever 17, as well as a pneumatic distributor 18.

The machine works as follows.

The clamps 1 and 2 are welded parts, and under the action of compressed air from the valve 12 piston 9 with the rods 10 and 11 of the device 4 automatic tripping. is in the rightmost position relative to the housing 8 of the pneumatic cylinder 7, and the piston of the cylinder 16 precipitates in the leftmost position. The operator when preheating, acting on the lever 15 by means of the levers 14 and 13 of the actuator 5 heating; and also through the housing 8 of the pneumatic cylinder 7 gives the movable clip 2 the possibility of

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gate-wise movements through the piston 9 and its rod 10. In the presence of compressed air from the pneumatic distributor 12 in the pneumatic cylinder 7, its piston 9 and housing 8 move together with heating and melting from the lever 15 through the levers 14 and 13 of the heating and melting drive. The force developed by the pneumatic cylinder 7 must be greater than the force required to destroy the possible seizure between the joined surfaces when they are compressed in the case of preheating welding. As the preheating is completed by the lever 15, the operator transfers the welding process to the continuous reflow mode, with the pneumatic cylinder body 7 together with the piston 9, the rod 10 and the movable clamp 2 making translational movement. When the precipitation is switched on, the pneumatic distributor 12 is electrically switched and after a period of time necessary to completely remove compressed air from the pneumatic cylinder 7 and the return cavity B of the precipitation cylinder 16, during which the operator continues the reflow process, the pneumatic distributor 18 is switched on electrically and the compressed air is supplied from the pneumatic distributor 12 through pneumatic valve 18 into the cavity A of the cylinder 16 precipitation. In this case, the lever 17 of the actuator 6 precipitates overcomes the gap d, formed in the process of heating and melting between its end and the rod 11 of the pneumatic cylinder 7, and acts on the rod 11, which transfers the force of the draft to the movable clamp 2, while the body 8 of the pneumatic cylinder 7 remains stationary, and consequently, the heating drive 5 with the lever 15. To return the machine to its original position, you must open the clamp}, turn off the hydraulic valves 12 and 18 and move the lever 15 of the heating and melting mechanism to the right ..

Dp to ensure the safe operation of the operator, regardless of the initial distance between the clamps, as well as mezvdu details when welding, the piston 9 of the pneumatic cylinder 7 must be greater than the stroke of the movable clamp during the draft.

The described design ensures the safety of the welder-one from the impact of a manual pre-heating actuator handle at the moment of launching nHeBMaTHMec - upsetting drive, improving the quality of the welded joint by reducing the time from the moment of disconnecting the manual actuator Heating and melting from the clamp to the last upsetting drive , reduce the labor intensity of manufacturing the machine.

Claims (1)

Fusion butt welding machine comprising movable and fixed clamps, a manual lever preheater and reflow actuator, a pneumatic draft actuator with a pneumatic distributor, and a device for automatically releasing a movable clamp from a preheater and reflow actuator during draft, characterized in that, with The goal is to increase the safety of the operator, the quality of the welded joint and reduce the complexity of manufacturing the machine, the automatic trip device is made in de installed with the possibility of axial movement of a two-rod pneumatic cylinder with a pneumatic distributor, the pneumatic cylinder body is pivotally connected to the preheating and reflow drive, and its rods are installed with the possibility of interaction with the precipitation drive and a movable clamp, while <S one of the cavities of the two-rod pneumatic cylinder is connected to the piston cavity of the pneumatic cylinder precipitation and with a normally open channel of its air distributor, a normally closed channel. which is connected with a normally open channel of pneumatic the distributor air cylinder rainfall.