Precise push-to-push machine head

Abstract

The utility model discloses a precise opposite-pushing machine head which comprises a machine head shell, an automatic centering assembly, a welding following assembly, a left air cylinder, a right air cylinder, a left electrode, a right electrode, a top installation block and an air cylinder limiting assembly. The top mounting block is mounted at the top of the machine head shell; the automatic centering assembly penetrates through the top mounting block and is movably connected with the machine head shell; the left air cylinder and the right air cylinder are installed in the machine head shell through the air cylinder limiting assembly and externally connected with an air source, the left electrode is detachably installed at the movable end of the left air cylinder, the welding following assembly is installed at the movable end of the right air cylinder, and the right electrode is detachably installed on the welding following assembly. The left electrode and the right electrode are oppositely arranged on the two sides of the workpiece and externally connected with a welding power source. The utility model can solve the problems in the prior art that the precision requirement of the placing position of the workpiece between the left and right electrodes is high and the workpiece may be damaged by the extrusion of the moving side electrode.

Description

TECHNICAL FIELD

[0001] The utility model relates to welding equipment technical field especially relates to a precision push head. BACKGROUND

[0002] In the welding processing of workpieces, the workpieces need to be placed vertically, and the left and right electrodes of the welding head apply pressure to the left and right sides of the workpiece and perform discharge welding. The left and right electrodes of the welding head in the prior art can move synchronously and touch the workpiece at the same time for welding. The workpiece needs to be positioned in the middle of the left and right electrodes during welding, which requires high precision of the workpiece position and is not conducive to ensuring the consistency of the welding quality.

[0003] In the prior art welding head, one electrode is fixed and the other electrode is movable to approach the workpiece. In the prior art with one fixed and one movable electrode, the workpiece must be placed close to the fixed electrode, otherwise it will be damaged by the moving electrode if there is a gap. Therefore, a precision push head is needed to solve the problems of high precision requirement for the workpiece position between the left and right electrodes and the workpiece being damaged by the moving electrode. SUMMARY

[0004] The utility model discloses a precision push head, which can solve the problems of high precision requirement for the workpiece position between the left and right electrodes and the workpiece being damaged by the moving electrode in the prior art.

[0005] The utility model is implemented as follows:

[0006] A precision push head comprises a head shell, an automatic centering assembly, a welding following assembly, a left cylinder, a right cylinder, a left electrode, a right electrode, a top mounting block, and a cylinder limiting assembly. The top mounting block is mounted on the top of the head shell. The middle part of the automatic centering assembly is fixedly installed through the top mounting block, and the two ends of the automatic centering assembly are movably connected to the top of the head shell, so that the head shell is movably arranged below the top mounting block through the automatic centering assembly. The left cylinder and the right cylinder are installed in the head shell through the cylinder limiting assembly. The left cylinder and the right cylinder are connected to a gas source. The left electrode is detachably installed on the movable end of the left cylinder. The welding following assembly is installed on the movable end of the right cylinder. The right electrode is detachably installed on the welding following assembly. The left electrode and the right electrode are oppositely arranged on the two sides of the workpiece and connected to a welding power supply.

[0007] The automatic centering assembly comprises a front shaft, a rear shaft, a left supporting block and a right supporting block; the front shaft and the rear shaft are arranged in parallel and fixedly penetrated through the top mounting block, the left supporting block and the right supporting block are fixedly mounted on the top left side and the top right side of the machine head shell respectively, and the left ends of the front shaft and the rear shaft are movably penetrated through the left supporting block respectively, and the right ends of the front shaft and the rear shaft are movably penetrated through the right supporting block respectively.

[0008] The cylinder limiting assembly comprises a first adjusting limiting rod, an adjusting nut, a cylinder slide rail, a second adjusting limiting rod and a limiting nut; the movable ends of the left cylinder and the right cylinder are slidably mounted in the machine head shell through the cylinder slide rail respectively; a pair of adjusting nuts are rotatably mounted on the two side plates of the machine head shell respectively, a pair of first adjusting limiting rods are penetrated through the two side plates of the machine head shell and matched with the adjusting nuts for rotation connection, so that one end of the pair of first adjusting limiting rods is located in the machine head shell and abuts against the movable bodies of the left cylinder and the right cylinder respectively; one end of a pair of second adjusting limiting rods is penetrated through the two side plates of the machine head shell and connected on the central shafts of the left cylinder and the right cylinder, and the other end of the pair of second adjusting limiting rods is fixed on the two side plates of the machine head shell through the limiting nuts respectively.

[0009] The cylinder limiting assembly further comprises a hydraulic buffer, which is mounted between the left side of the top mounting block and the left supporting block, between the right side of the top mounting block and the right supporting block, between the left side plate of the machine head shell and the left cylinder, and between the right side plate of the machine head shell and the right cylinder.

[0010] The cylinder limiting assembly further comprises a plurality of cylinder motion position sensors, each of which comprises a trigger piece and a trigger inductor; the trigger pieces are mounted on the left cylinder and the right cylinder respectively, and the trigger inductors are mounted on the cross beams of the inner walls of the top of the machine head shell, so that the trigger pieces can be in contact connection with the trigger inductors when the left cylinder and the right cylinder move along the cylinder slide rail.

[0011] The welding following assembly comprises a follower shell, a follower slide rail, a follower mounting block, a discharge trigger piece and a discharge trigger inductor; the follower shell is mounted on the inner right side of the machine head shell, the follower slide rail is mounted in the follower shell, the follower mounting block is slidably mounted on the follower slide rail, and the right electrode is mounted on the follower mounting block; the discharge trigger inductor is mounted on the side of the follower mounting block, and the discharge trigger piece is mounted on the inner side wall of the follower shell, so that the discharge trigger inductor can be in contact connection with the discharge trigger piece when the follower mounting block slides along the follower slide rail, and the discharge trigger inductor is connected with a welding power supply controller.

[0012] The welding following assembly further comprises a pressure spring mounting block and a pressure spring; one end of the pressure spring is mounted on the rear part of the follower mounting block through the pressure spring mounting block, and the other end of the pressure spring is mounted on the inner side wall of the follower shell.

[0013] The welding following assembly further comprises a follower displacement sensor installed between the follower shell and the follower mounting block.

[0014] The movable end of the left cylinder is provided with a left fixing block, the left fixing block is installed with a left clamping block, one end of the inverted L-shaped left electrode is inserted into the left clamping block and is fixed by a left electrode fixing plate, the movable end of the right cylinder is provided with a right fixing block, the right fixing block is installed with a right clamping block, one end of the inverted L-shaped right electrode is inserted into the right clamping block and is fixed by a right electrode fixing plate, and the other end of the left electrode and the other end of the right electrode are oppositely arranged on the two sides of the workpiece.

[0015] The left clamping block is installed with a left water passing block, the left water passing block is provided with a left insulation plate between the left water passing block and the left fixing block, and the left water passing block is externally connected with a water source through a circulating water path; the right clamping block is installed with a right water passing block, the right water passing block is provided with a right insulation plate between the right water passing block and the right fixing block, and the right water passing block is externally connected with a water source through a circulating water path.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1、 the utility model discloses a welding head outer shell automatic centering assembly, when one side electrode contacts workpiece, the reaction force of workpiece to electrode acts on the side cylinder, thereby driving the movement of the head shell along the front shaft and the rear shaft, realizing the automatic centering adjustment between the electrode and the workpiece position, which can ensure the welding quality while not strictly requiring the accuracy of the workpiece placement position, making the welding operation simpler and easier.

[0018] 2、 the utility model discloses a welding following assembly, which can ensure the effective clamping of the right electrode to the workpiece through the compression of the pressure spring, avoid the excessive extrusion of the right electrode to the workpiece, ensure the controllability and accuracy of the welding pressure, and avoid the problem of workpiece damage caused by electrode extrusion in the prior art.

[0019] 3、 the utility model discloses a welding following assembly, which can adjust the opening distance of the left electrode and the right electrode through the first adjusting limiting rod and the second adjusting limiting rod, and trigger the movement of the left cylinder and the right cylinder through the setting of the cylinder movement position sensor, so as to ensure that the left and right electrodes generate a certain welding pressure to the workpiece under the accurate control of the left and right cylinders, thereby improving the welding quality.

[0020] 4. The utility model discloses a left water block and right water block are established, and the heat generated by electrode welding is taken away by the cooling water of circulation flow and is passed to the water block, can cool the electrode fast after once welding is completed, avoids heat accumulation to next welding, is favorable to guarantee the consistency of welding effect, and prolongs the service life of electrode. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the front side view perspective diagram of the precision push machine head of the utility model;

[0022] Figure 2 It is the back side view perspective diagram of the precision push machine head of the utility model;

[0023] Figure 3 It is the lower side view perspective diagram of the precision push machine head of the utility model;

[0024] Figure 4 It is one view angle partial structure schematic diagram of the welding following assembly in the precision push machine head of the utility model;

[0025] Figure 5 It is another view angle partial structure schematic diagram of the welding following assembly in the precision push machine head of the utility model.

[0026] In the drawing, 1 is the head shell 1, left cylinder 2, right cylinder 3, left electrode 4, right electrode 5, top mounting block 6, front shaft 7, rear axle 8, left support block 9, right support block 10, first adjusting limit rod 11, adjusting nut 12, cylinder slide rail 13, second adjusting limit rod 14, limit nut 15, hydraulic buffer 16, cylinder movement position sensor 17, follower shell 18, follower slide rail 19, follower mounting block 20, discharge trigger piece 21, discharge trigger sensor 22, pressure spring mounting block 23, pressure spring 24, follower displacement sensor 25, left fixed block 26, left clamping block 27, left electrode fixed plate 28, right fixed block 29, right clamping block 30, right electrode fixed plate 31, left water block 32, left insulating plate 33, right water block 34, right insulating plate 35, pressure regulating device 36. DETAILED DESCRIPTION

[0027] The utility model will be further described below in connection with the drawings and specific embodiment.

[0028] Please refer to the attached Figure 1 to the attached Figure 3The utility model provides a precision push head, including head shell 1, automatic centering assembly, welding follow-up assembly, left cylinder 2, right cylinder 3, left electrode 4, right electrode 5, top mounting block 6 and cylinder limiting assembly, top mounting block 6 is installed on the top of head shell 1 and is installed to the outside hoisting mechanism, makes the whole precision push head through top mounting block 6 hoist in the upper welding station, the middle part of automatic centering assembly is fixedly installed on top mounting block 6, and the both ends of automatic centering assembly are movably connected with the top both sides of head shell 1, so that head shell 1 is movably arranged below top mounting block 6 through automatic centering assembly, left cylinder 2 and right cylinder 3 are installed in head shell 1 through cylinder limiting assembly, left cylinder 2 and right cylinder 3 are connected with gas source, left electrode 4 is detachably installed on the movable end of left cylinder 2, welding follow-up assembly is installed on the movable end of right cylinder 3, right electrode 5 is detachably installed on welding follow-up assembly, and left electrode 4 and right electrode 5 are oppositely arranged on the both sides of workpiece and connected with welding power supply.

[0029] Left cylinder 2 and right cylinder 3 are supplied with gas through external gas source, and the gas pressure of left cylinder 2 and right cylinder 3 is controlled, so that the movable end of left cylinder 2 and right cylinder 3 is pushed out or withdrawn into the cylinder, the movement of left electrode 4 is controlled through left cylinder 2, the movement of welding follow-up assembly and right electrode 5 is controlled through right cylinder, and then left electrode 4 and right electrode 5 are moved to approach the workpiece and clamp the workpiece with certain welding pressure.

[0030] Through the setting of automatic centering assembly and cylinder limiting assembly, left electrode 4 can be prevented from extruding the workpiece by excessive movement, and the workpiece does not need to be accurately placed at the middle position between left electrode 4 and right electrode 5, through the setting of welding follow-up assembly and cylinder limiting assembly, right electrode 5 can be prevented from extruding the workpiece by excessive movement, the workpiece can be welded and docked under the condition that the welding pressure on both sides is consistent, the welding quality is improved, and the workpiece can be prevented from being damaged by extrusion.

[0031] Please refer to the accompanying drawings Figure 1 and the accompanying drawings Figure 2 The automatic centering assembly includes front shaft 7, rear shaft 8, left support block 9 and right support block 10, front shaft 7 and rear shaft 8 are arranged in parallel and fixedly installed on top mounting block 6, left support block 9 and right support block 10 are fixedly installed on the top left side and the top right side of head shell 1 respectively, the left ends of front shaft 7 and rear shaft 8 movably penetrate the reserved through hole of left support block 9 respectively, and the right ends of front shaft 7 and rear shaft 8 movably penetrate the reserved through hole of right support block 10 respectively.

[0032] Top mounting block 6 can be fixedly installed on the external structure such as hoisting block through connecting members such as bolts, so that the precision push head can be quickly and conveniently disassembled and assembled.

[0033] Preferably, the head shell 1 can adopt an overall hollow shell structure composed of a top plate, two side plates, a front plate and a rear plate.

[0034] Preferably, the front shaft 7 and the rear shaft 8 are horizontally arranged, and the head shell 1 can move along the axial direction of the front shaft 7 and the rear shaft 8 by the arrangement of the front shaft 7, the rear shaft 8, the left supporting block 9 and the right supporting block 10. Taking the left electrode 4 as an example, when the left electrode 4 touches the left side of the workpiece, if the left electrode 4 continues to move under the push of the left cylinder 2, it may cause damage to the workpiece by extrusion. At this time, the workpiece generates a reaction force on the left electrode 4, which makes the fixed end of the left cylinder 2 and the head shell 1 move relatively along the front shaft 7, the rear shaft 8 and the top mounting block 6, avoiding the left electrode 4 from continuing to move and extruding the workpiece.

[0035] Preferably, the left supporting block 9 and the right supporting block 10 are provided with through holes slightly larger than the diameters of the front shaft 7 and the rear shaft 8, facilitating the installation of the front shaft 7 and the rear shaft 8. Meanwhile, nuts or flanges or other limiting structures can be arranged at the two ends of the front shaft 7 and the rear shaft 8 to limit the maximum amplitude of the movement of the head shell 1 relative to the top mounting block 6 by the interference of the limiting structures with the left supporting block 9 and the right supporting block 10, ensuring the stable and controllable movement of the head shell 1.

[0036] Please refer to the accompanying drawings Figure 3 The cylinder limiting assembly comprises a first adjusting limiting rod 11, an adjusting nut 12, a cylinder slide rail 13, a second adjusting limiting rod 14 and a limiting nut 15. The movable ends of the left cylinder 2 and the right cylinder 3 are slidably installed in the head shell 1 through the cylinder slide rail 13. A pair of adjusting nuts 12 are rotatably installed on the two side plates of the head shell 1 through rotating bearings. A pair of first adjusting limiting rods 11 penetrate the two side plates of the head shell 1 and are matched and screwed with the adjusting nuts 12, so that one end of each of the first adjusting limiting rods 11 is located in the head shell 1 and interferes with the movable body of the left cylinder 2 and the right cylinder 3, and the fixed ends of the left cylinder 2 and the right cylinder 3 are installed in the head shell 1. One end of each of a pair of second adjusting limiting rods 14 penetrates the two side plates of the head shell 1 and is connected to the central shafts of the left cylinder 2 and the right cylinder 3, and the other end of each of the second adjusting limiting rods 14 is fixed to the two side plates of the head shell 1 through the limiting nut 15.

[0037] When the left electrode 4 touches the left side of the workpiece, if the left electrode 4 continues to move under the action of the gas pressure of the movable end of the left cylinder 2, the left electrode 4 remains in contact with the workpiece and no longer moves, and the fixed end of the left cylinder 2 drives the head shell 1 to move along the front shaft 7 and the rear shaft 8 synchronously under the action of the reaction force through the first adjusting limiting rod 11, thereby avoiding the left electrode 4 from continuing to move and excessively extruding the workpiece under the push of the movable end of the left cylinder 2.

[0038] By setting the first adjusting limit rod 11, rotating the adjusting nut 12, and converting the rotating movement of the adjusting nut 12 into the axial linear movement of the first adjusting limit rod 11 through threaded transmission, the length of the first adjusting limit rod 11 extending into the head shell 1 is adjusted, so as to determine the initial position of the left cylinder 2. By setting the second adjusting limit rod 14, the distance between the second adjusting limit rod 14 and the two side plates of the head shell 1 is adjusted to control the moving distance of the movable body of the left cylinder 2 and the right cylinder 3, so as to adjust the maximum distance of the head shell 1 and the left cylinder 2 moving to the right, and then the opening distance adjustment of the left cylinder 2 is realized through the initial position and the maximum distance of the left cylinder 2 moving to the right, which is flexible and convenient.

[0039] The opening distance adjustment of the right electrode 5 is the same as that of the left electrode 4, which will not be described here.

[0040] Please refer to the attached drawings Figure 3 The cylinder limiting assembly further comprises a hydraulic buffer 16 installed between the left side of the top mounting block 6 and the left supporting block 9, between the right side of the top mounting block 6 and the right supporting block 10, between the left side plate of the head shell 1 and the left cylinder 2, and between the right side plate of the head shell 1 and the right cylinder 3.

[0041] Preferably, the hydraulic buffer 16 mainly comprises a hydraulic cylinder and a piston rod, the hydraulic cylinder is installed on the left supporting block 9 / right supporting block 10, one end of the piston rod is movably installed in the hydraulic cylinder through hydraulic oil, and the other end of the piston rod is installed on the top mounting block 6, so as to ensure the smooth and quiet movement of the head shell 1 by using the hydraulic pressure generated by the hydraulic oil when the head shell 1 moves relative to the top mounting block 6. Similarly, the hydraulic buffer 16 is installed between the left side plate of the head shell 1 and the left cylinder 2, and between the right side plate of the head shell 1 and the right cylinder 3 through the hydraulic cylinder and the piston rod, so as to further improve the smoothness of the movement of the head shell 1.

[0042] Please refer to the attached drawings Figure 3 The cylinder limiting assembly further comprises a plurality of cylinder movement position sensors 17, each of which comprises a trigger piece and a trigger inductor, the trigger piece is installed on the left cylinder 2 and the right cylinder 3, and the trigger inductor is installed on the crossbeam of the inner wall of the top of the head shell 1, so that when the left cylinder 2 and the right cylinder 3 move along the cylinder slide rail 13, the trigger piece can be in contact with the trigger inductor.

[0043] Under the action of the reaction force, the moving end of the left cylinder 2 and the right cylinder 3 moves relative to the cylinder slide rail 13, triggering the inductor to contact the corresponding cylinder gas source controller. Taking the left cylinder 2 as an example, when the trigger piece moves to contact the trigger inductor, the trigger inductor is triggered and sends an electrical signal to the gas source controller of the left cylinder 2, so that the gas source stops supplying gas, thereby stopping the movement of the moving end of the left cylinder 2, and positioning the left electrode 4. The movement positioning process of the right electrode 5 is the same as that of the left electrode 4, which will not be described here.

[0044] Please refer to the accompanying drawings Figure 4 and the accompanying drawings Figure 5 , the welding following assembly comprises a follower housing 18, a follower slide rail 19, a follower mounting block 20, a discharge trigger piece 21 and a discharge trigger sensor 22; the follower housing 18 is installed on the right side of the inside of the head housing 1, the follower slide rail 19 is installed in the follower housing 18, the follower mounting block 20 is slidably installed on the follower slide rail 19, and the right electrode 5 is installed on the follower mounting block 20; the discharge trigger sensor 22 is installed on the side of the follower mounting block 20, and the discharge trigger piece 21 is installed on the inner side wall of the follower housing 18, so that when the follower mounting block 20 slides along the follower slide rail 19, the discharge trigger sensor 22 can be in contact with the discharge trigger piece 21, and the discharge trigger sensor 22 is connected with the welding power source controller.

[0045] Preferably, the follower housing 18 can adopt an overall hollow shell structure composed of a top plate, two side plates, a front plate and a rear plate, the follower slide rail 19 is installed on the top plate, and the follower mounting block 20 is slidably assembled with the follower slide rail 19 through a sliding block.

[0046] Under normal circumstances, the right electrode 5 and the welding following assembly move synchronously under the control of the right cylinder 3, and when the right electrode 5 touches the right side of the workpiece, the right electrode 5 stops moving, at this time, the right electrode 5 and the discharge trigger sensor 22 move relative to the follower housing 18 through the follower mounting block 20, the discharge trigger sensor 22 moves to contact the discharge trigger piece 21, the discharge trigger sensor 22 is triggered and sends an electrical signal to the welding power source controller, so that the welding power source discharges, and the left electrode 4 and the right electrode 5 perform welding work on the workpiece.

[0047] Please refer to the accompanying drawings Figure 4 and the accompanying drawings Figure 5 , the welding following assembly further comprises a pressure spring mounting block 23 and a pressure spring 24, one end of the pressure spring 24 is installed on the rear part of the follower mounting block 20 through the pressure spring mounting block 23, and the other end of the pressure spring 24 is installed on the inner side wall of the follower housing 18.

[0048] When the right electrode 5 touches the right side of the workpiece, the movable end of the right cylinder 3 can still push the right electrode 5 and the welding follower assembly to move left, the follower shell 18 continues to move left, the compression spring 24 is compressed and generates a reaction force on the follower mounting block 20, so that the clamping force of the right electrode 5 on the workpiece is within a proper range, avoiding poor contact or excessive extrusion when the right electrode 5 is welded to the workpiece.

[0049] Please refer to the accompanying drawings Figure 4 and the accompanying drawings Figure 5 The welding follower assembly further comprises a follower displacement sensor 25 installed between the follower shell 18 and the follower mounting block 20.

[0050] During discharge welding, the follower displacement sensor 25 detects the distance between the follower shell 18 and the follower mounting block 20. After welding, the workpiece can become soft and deformed due to heat, at which time the right electrode 5 is pushed to adhere to the surface of the workpiece under the elastic force of the compression spring 24, so that the follower mounting block 20 moves a corresponding offset amount, and the follower displacement sensor 25 detects the distance between the follower shell 18 and the follower mounting block 20 again, so that the welding deformation of the workpiece can be obtained through the difference between the distances on both sides.

[0051] Please refer to the accompanying drawings Figure 1 to the accompanying drawings Figure 3 The movable end of the left cylinder 2 is provided with a left fixed block 26, the left fixed block 26 is installed with a left clamping block 27, one end of the inverted L-shaped left electrode 4 is inserted into the left clamping block 27 and is installed and fixed through a left electrode fixing plate 28; the movable end of the right cylinder 3 is provided with a right fixed block 29, the right fixed block 29 is installed with a right clamping block 30, one end of the inverted L-shaped right electrode 5 is inserted into the right clamping block 30 and is installed and fixed through a right electrode fixing plate 31, so that the other end of the left electrode 4 and the other end of the right electrode 5 are oppositely arranged on both sides of the workpiece.

[0052] The left clamping block 27 and the right clamping block 30 adopt a hollow structure with an open bottom, which is used for inserting one end of the left electrode 4 and one end of the right electrode 5, and then the left electrode fixing plate 28 and the right electrode fixing plate 31 are used for packaging at the bottom opening of the left clamping block 27 and the right clamping block 30, so as to ensure reliable installation of the left electrode 4 and the right electrode 5.

[0053] Since the left electrode 4 and the right electrode 5 are consumables, they need to be frequently disassembled and replaced. Through the detachable installation mode, the disassembly of the left electrode 4 and the right electrode 5 is simple and convenient, and the maintenance cost is reduced.

[0054] Please refer to the accompanying drawings Figure 3The left clamping block 27 is provided with a left water passing block 32, and the left water passing block 32 is provided with a left insulation plate 33 between the left water passing block 32 and the left fixed block 26, and the left water passing block 32 is externally connected with a water source through a circulating water path; and the right clamping block 30 is provided with a right water passing block 34, and the right water passing block 34 is provided with a right insulation plate 35 between the right water passing block 34 and the right fixed block 29, and the right water passing block 34 is externally connected with a water source through a circulating water path.

[0055] During welding, the heat of the left electrode 4 and the right electrode 5 is transferred to the left clamping block 27 and the right clamping block 30, and then is transferred to the left water passing block 32 and the right water passing block 34. The left water passing block 32 and the right water passing block 34 are both provided with a water inlet joint and a water outlet joint, and the left water passing block 32 and the right water passing block 34 are internally formed with a water passing cavity connected between the water inlet joint and the water outlet joint, and a circulating water path is formed between the water passing cavity, the water inlet joint, the water outlet joint and an external water source.

[0056] The circulating cooling water continuously takes away the heat of the left water passing block 32 and the right water passing block 34 through the circulating water path, so as to cool the left electrode 4 and the right electrode 5, quickly release the heat generated by the last welding, avoid accumulation to the next welding, thereby ensuring the consistency of the welding effect of each welding, and reducing the temperature of the electrode, so that the electrode is not easy to be damaged, and the service life of the electrode is prolonged.

[0057] Preferably, the left water passing block 32, the right water passing block 34, the left clamping block 27 and the right clamping block 30 are made of metal materials with good heat conduction performance, so as to facilitate heat conduction. Through the setting of the left insulation plate 33 and the right insulation plate 35, the left water passing block 32 and the right water passing block 34 can be effectively prevented from being electrified.

[0058] Please refer to the accompanying drawings Figure 1 to the accompanying drawings Figure 3 The handpiece shell 1 is provided with a pressure adjusting device 36.

[0059] Preferably, the pressure adjusting device 36 can adopt the pressure adjusting device disclosed in the utility model patent CN212704953U for detecting and accurately adjusting the welding pressure, and the working principle and working process thereof will not be described herein.

[0060] Please refer to the accompanying drawings Figure 1 to the accompanying drawings Figure 5 The working process and working principle of the utility model are as follows:

[0061] The workpiece to be welded is placed between the left electrode 4 and the right electrode 5, and is approximately positioned at the middle position of the left electrode 4 and the right electrode 5, and does not need to be accurately positioned. Then, the left cylinder 2 and the right cylinder 3 are ventilated by an external air source, so that the movable end of the left cylinder 2 drives the left electrode 4, the left fixed block 26, the left clamping block 27, the left water passing block 32 and the left insulating plate 33 to move synchronously to the right along the cylinder sliding rail 13, and at the same time, the movable end of the right cylinder 3 drives the welding following assembly, the right electrode 5, the right fixed block 29, the right clamping block 30, the right water passing block 34 and the right insulating plate 35 to move synchronously to the left along the cylinder sliding rail 13, so that the left electrode 4 and the right electrode 5 are close to the workpiece.

[0062] If the workpiece is not accurately positioned at the middle position of the left electrode 4 and the right electrode 5, and the workpiece is closer to the left electrode 4, for example, the left electrode 4 is first close to and abuts against the right side of the workpiece, at this time, the left electrode 4 stops moving, and the movable end of the left cylinder 2 still moves to the right, and the workpiece generates a reaction force on the left electrode 4, so that the fixed end of the left cylinder 2 and the head shell 1 move to the left, and the head shell 1 moves synchronously along the front shaft 7 and the rear shaft 8 through the left supporting block 9 and the right supporting block 10.

[0063] When the left cylinder 2 reaches the maximum stroke, the trigger piece of the cylinder movement position sensor 17 of the left cylinder 2 contacts and triggers the trigger sensor, the trigger sensor sends an electric signal to the air source of the left cylinder 2, so that the air source stops supplying air, and the movable end of the left cylinder 2 stops moving, so as to position the left electrode 4.

[0064] At this time, the right electrode 5 has not contacted the right side of the workpiece, and continues to move to the left to close to the right side of the workpiece under the pushing of the right cylinder 3, until contacting the right side of the workpiece. The positioning method of the right electrode 5 is the same as that of the left electrode 4, and will not be described here, so that the left electrode 4 and the right electrode 5 abut against the two sides of the workpiece with the same welding pressure, and the automatic centering function between the precise pushing head and the workpiece not accurately positioned is realized.

[0065] If the workpiece is closer to the right electrode 5, the positioning process of the right electrode 5 is the same as that of the left electrode 4, and will not be described here.

[0066] When the right cylinder 3 moves to the maximum stroke, the compression spring 24 is compressed, the discharge trigger piece 21 contacts the discharge trigger sensor 22, the discharge trigger sensor 22 generates an electric signal to the welding power supply controller, so that the welding power supply discharges, and the left electrode 4 and the right electrode 5 perform welding work on the workpiece.

[0067] In the discharge welding, the follower displacement sensor 25 detects the distance between the follower shell 18 and the follower mounting block 20. After welding, the workpiece can be softened and deformed due to heat, at this time, the right electrode 5 is pushed to adhere to the surface of the workpiece under the elastic force of the pressure spring 24, so that the follower mounting block 20 moves a corresponding offset amount, and the follower displacement sensor 25 detects the distance between the follower shell 18 and the follower mounting block 20 again, so that the welding deformation amount of the workpiece can be obtained through the distance detection of both sides.

[0068] After the discharge welding is completed, the left cylinder 2 and the right cylinder 3 are deflated, and simultaneously move in opposite directions until stop after colliding with the first limiting adjusting limiting rods 11 on the left and right sides; the whole movement process is completed.

[0069] The above is only a preferred embodiment of the present application, and is not used to limit the protection scope of the present application, therefore, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A precision push-on head characterized by: The utility model provides a welding head, which comprises a head shell (1), an automatic centering assembly, a welding following assembly, a left cylinder (2), a right cylinder (3), a left electrode (4), a right electrode (5), a top mounting block (6) and a cylinder limiting assembly; the top mounting block (6) is mounted on the top of the head shell (1); the automatic centering assembly is fixedly installed in the middle part and penetrates through the top mounting block (6); the two ends of the automatic centering assembly are movably connected to the top of the head shell (1), so that the head shell (1) is movably arranged below the top mounting block (6) through the automatic centering assembly; the left cylinder (2) and the right cylinder (3) are installed in the head shell (1) through the cylinder limiting assembly; the left cylinder (2) and the right cylinder (3) are connected to a gas source; the left electrode (4) is detachably installed on the movable end of the left cylinder (2); the welding following assembly is installed on the movable end of the right cylinder (3); the right electrode (5) is detachably installed on the welding following assembly; the left electrode (4) and the right electrode (5) are oppositely arranged on the two sides of a workpiece and connected to a welding power source.

2. The precision push-on mouthpiece of claim 1, wherein: The automatic centering assembly comprises a front shaft (7), a rear shaft (8), a left supporting block (9) and a right supporting block (10); the front shaft (7) and the rear shaft (8) are arranged in parallel and fixedly installed on the top mounting block (6) and penetrate through; the left supporting block (9) and the right supporting block (10) are fixedly installed on the left side and the right side of the top of the head shell (1); the left ends of the front shaft (7) and the rear shaft (8) movably penetrate through the left supporting block (9); the right ends of the front shaft (7) and the rear shaft (8) movably penetrate through the right supporting block (10).

3. The precision push-on mouthpiece of claim 1, wherein: The cylinder limiting assembly comprises a first adjusting limiting rod (11), an adjusting nut (12), a cylinder sliding rail (13), a second adjusting limiting rod (14) and a limiting nut (15); the movable ends of the left cylinder (2) and the right cylinder (3) are slidably installed in the head shell (1) through the cylinder sliding rail (13); a pair of adjusting nuts (12) are rotatably installed on the two side plates of the head shell (1); a pair of first adjusting limiting rods (11) penetrate through the two side plates of the head shell (1) and are matched with the adjusting nuts (12) and are screwed, so that one end of the pair of first adjusting limiting rods (11) is located in the head shell (1) and abuts against the movable bodies of the left cylinder (2) and the right cylinder (3); one end of a pair of second adjusting limiting rods (14) penetrates through the two side plates of the head shell (1) and is connected to the central shafts of the left cylinder (2) and the right cylinder (3); the other ends of the pair of second adjusting limiting rods (14) are fixed to the two side plates of the head shell (1) through the limiting nuts (15).

4. The precision push-on mouthpiece of claim 3, wherein: The cylinder limiting assembly further comprises a hydraulic buffer (16), which is installed between the left side of the top mounting block (6) and the left supporting block (9), between the right side of the top mounting block (6) and the right supporting block (10), between the left side plate of the head shell (1) and the left cylinder (2) and between the right side plate of the head shell (1) and the right cylinder (3).

5. The precision push-on mouthpiece of claim 3 wherein: The cylinder limiting assembly further comprises a plurality of cylinder motion position sensors (17), each of which comprises a trigger piece and a trigger inductor, the trigger pieces are installed on the left cylinder (2) and the right cylinder (3), and the trigger inductor is installed on the crossbeam of the inner wall of the top of the head shell (1), so that the trigger pieces can be in contact with the trigger inductor when the left cylinder (2) and the right cylinder (3) move along the cylinder slide rail (13).

6. The precision push-on mouthpiece of claim 1 wherein: The welding following assembly comprises a follower shell (18), a follower slide rail (19), a follower mounting block (20), a discharge trigger piece (21) and a discharge trigger sensor (22); the follower shell (18) is installed on the inner right side of the head shell (1), the follower slide rail (19) is installed in the follower shell (18), the follower mounting block (20) is slidably installed on the follower slide rail (19), and the right electrode (5) is installed on the follower mounting block (20); the discharge trigger sensor (22) is installed on the side of the follower mounting block (20), the discharge trigger piece (21) is installed on the inner side wall of the follower shell (18), so that the discharge trigger sensor (22) can be in contact with the discharge trigger piece (21) when the follower mounting block (20) slides along the follower slide rail (19), and the discharge trigger sensor (22) is connected with a welding power supply controller.

7. The precision push-on mouthpiece of claim 6, wherein: The welding following assembly further comprises a pressure spring mounting block (23) and a pressure spring (24), one end of the pressure spring (24) is installed on the rear of the follower mounting block (20) through the pressure spring mounting block (23), and the other end of the pressure spring (24) is installed on the inner side wall of the follower shell (18).

8. The precision push-on mouthpiece of claim 6, wherein: The welding following assembly further comprises a follower displacement sensor (25) installed between the follower shell (18) and the follower mounting block (20).

9. The precision push-on mouthpiece of any of claims 1, 3-5, wherein: The movable end of the left cylinder (2) is provided with a left fixing block (26), the left fixing block (26) is installed with a left clamping block (27), one end of the inverted L-shaped left electrode (4) is inserted into the left clamping block (27) and is fixed by a left electrode fixing plate (28); the movable end of the right cylinder (3) is provided with a right fixing block (29), the right fixing block (29) is installed with a right clamping block (30), one end of the inverted L-shaped right electrode (5) is inserted into the right clamping block (30) and is fixed by a right electrode fixing plate (31), so that the other end of the left electrode (4) and the other end of the right electrode (5) are oppositely arranged on the two sides of the workpiece.

10. The precision push-on mouthpiece of claim 9, wherein: The left clamping block (27) is installed with a left water passing block (32), the left water passing block (32) is provided with a left insulating plate (33) between the left water passing block (32) and the left fixing block (26), and the left water passing block (32) is connected with a water source through a circulating water path; the right clamping block (30) is installed with a right water passing block (34), the right water passing block (34) is provided with a right insulating plate (35) between the right water passing block (34) and the right fixing block (29), and the right water passing block (34) is connected with a water source through a circulating water path.

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