Automobile parts welding equipment

Abstract

The invention discloses an automobile parts welding equipment, comprising an articulated robot and a welding device; the welding device comprises a connecting seat and two symmetrical welding units; the welding unit comprises a welding clamp slidably arranged on the connecting seat, a driving member and a welding head switching assembly arranged on the welding clamp; the welding head switching assembly comprises a conversion disk, a guide disk arranged on the conversion disk and a welding head rotating disk movably arranged on the conversion disk; the disk surface of the guide disk is provided with an extrusion boss, and the extrusion boss is provided with a locking structure; a rotating driving structure capable of driving the welding head rotating disk to rotate is provided between the conversion disk and the welding head rotating disk; a first spring is connected between the welding head rotating disk and the guide disk, a plurality of welding electrode heads are movably penetrated in the circumferential direction of the welding head rotating disk, a second spring is provided between the welding electrode head and the welding head rotating disk, and the welding electrode head is provided with a switching driving assembly; the situation in which the work progress is delayed due to the need for human intervention to replace the welding electrode head during the work process is reduced, and the service life of the welding electrode head is improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to an automobile parts welding device. Background Art

[0002] During the welding process of automotive parts, continuous long-term operation of the welding clamp will cause the temperature of the welding clamp to rise. If the temperature is too high, the organization and performance of the welding electrode head will undergo irreversible changes, and in severe cases it may even cause the degradation of the welding electrode head.

[0003] However, during the production process, it is often impossible to detect in time that the temperature of the welding clamp is too high and replace the welding electrode head. Manual observation is required to detect and replace it, which affects production efficiency. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide an automobile parts welding device to reduce the situation where manual intervention is required to replace the welding electrode head during the work process, which causes the work progress to fall behind, and to increase the service life of the welding electrode head.

[0005] To achieve the above object, the specific scheme of the present invention is as follows:

[0006] An automobile parts welding device comprises an articulated robot and a welding device arranged on the output end of the articulated robot;

[0007] The welding device comprises a connecting seat and two welding units symmetrically arranged at both ends of the connecting seat; the welding unit comprises a welding clamp slidably arranged on the connecting seat, a driving member for driving the welding clamp to slide, and a welding head switching assembly arranged on the welding clamp;

[0008] The welding head switching assembly includes a conversion disk, a guide disk arranged on the conversion disk, and a welding head rotating disk movably arranged on the conversion disk; the disk surface of the guide disk is provided with an extrusion boss, and the extrusion boss is provided with a locking structure;

[0009] A rotating drive structure capable of driving the welding head turntable to rotate is provided between the conversion disk and the welding head turntable; a first spring is connected between the welding head turntable and the guide disk, a plurality of welding electrode heads are movably provided on the welding head turntable along the circumferential direction, a second spring is provided between the welding electrode head and the welding head turntable, and a switching drive assembly is provided on the welding electrode head;

[0010] When the positions of the welding electrode head and the extrusion boss correspond, the locking structure cooperates with the switching drive assembly of the welding electrode head to unlockably lock the welding head turntable, so that when the welding head turntable is in an unlocked state, the rotation drive structure drives the welding head turntable to rotate.

[0011] The present invention further comprises a conversion disk having a recessed receiving groove, a guide cylinder being arranged at the center of the receiving groove, the guide disk being coaxially sleeved on the outer wall of the guide cylinder, the welding head turntable being located in the receiving groove, a guide shaft being movably inserted into the guide cylinder being convexly arranged at the center of the welding head turntable, and a rotation driving structure being arranged on the guide cylinder and the guide shaft.

[0012] Furthermore, the present invention has a protective ring platform protruding from one side of the welding head turntable facing away from the guide plate corresponding to each welding electrode head; the first spring and the second spring allow the welding electrode head to be initially accommodated in the protective ring platform.

[0013] The present invention further provides a switching drive assembly comprising a switching slot arranged on the welding electrode head, a memory metal block arranged in the switching slot, a switching slider movably arranged in the switching slot and abutting against the memory metal block, and a third spring connected between the switching slider and the welding electrode head; the third spring enables the switching slider to maintain a state of abutting against the memory metal block; when the temperature of the memory metal block reaches its phase change temperature, it can push the switching slider to overcome the elastic force of the third spring and slide to the opening position of the switching slot, so that the welding head turntable is in an unlocked state.

[0014] The present invention further provides a locking structure comprising a first guide groove arranged on the extrusion boss, a fourth spring arranged in the first guide groove, and a locking pin slidably arranged in the first guide groove and abutting against the fourth spring; when the positions of the welding electrode head and the extrusion boss correspond and the temperature of the memory metal block has not reached its phase change temperature, the locking pin is inserted into the switching groove under the elastic force of the fourth spring, thereby locking the welding head turntable.

[0015] Furthermore, the present invention provides a circular slide groove on the disk surface of the guide disk, and the extrusion boss is arranged in the circular slide groove; the welding electrode head is slidably connected to the circular slide groove.

[0016] The present invention further comprises a rotation driving structure comprising a driving groove arranged on the inner wall of the guide cylinder and a driving pin elastically floatingly connected to the guide shaft, the driving pin being movably embedded in the driving groove;

[0017] The driving groove includes a plurality of vertical grooves and a plurality of spiral grooves uniformly distributed along the circumferential direction, the vertical grooves and the spiral grooves are alternately arranged, and the plurality of vertical grooves and the plurality of spiral grooves are sequentially connected end to end; the depth of one end of the vertical groove is greater than the depth of the other end of the spiral groove, one end of the spiral groove extends into the other end of the vertical groove, and the number of the vertical grooves and the number of the spiral grooves are the same as the number of the welding electrode heads; the end of the driving pin is provided with a guide fillet;

[0018] The vertical groove is provided with a first transition step between its two ends, and the other end of the vertical groove is provided with a second transition step whose height is lower than the first transition step at the intersection with the spiral groove, and the height of the second transition step is equal to the radius of the guide fillet.

[0019] The present invention further has a second guide groove in the radial direction of the guide shaft, a fifth spring is arranged in the second guide groove, the drive pin is slidably inserted into the second guide groove and abuts against the fifth spring, and the fifth spring keeps the drive pin abutting against the drive groove.

[0020] The present invention further forms a heat dissipation cavity between the guide disk and the welding head turntable, and the guide disk is provided with a heat dissipation channel, one end of the heat dissipation channel is connected to the heat dissipation cavity, and the other end of the heat dissipation channel is connected to the outside atmosphere.

[0021] Furthermore, in the present invention, the driving member is a driving cylinder.

[0022] Compared with the prior art, the present invention has the following beneficial effects: the present invention arranges an extrusion boss on the disk surface of the guide disk, arranges a locking structure on the extrusion boss, arranges a rotation drive structure between the conversion disk and the welding head turntable, and arranges a switching drive assembly on the welding electrode head, so that when the temperature of the welding electrode head is too high, the switching drive assembly can be disengaged from the locking cooperation with the locking structure, so that the welding head turntable is in an unlocked state, and the welding head turntable is driven to rotate by the rotation drive structure, so that the next welding electrode head rotates to correspond to the position of the extrusion boss, thereby realizing the replacement of the welding electrode head, effectively reducing the situation where the work progress is delayed due to the need for human intervention in replacing the welding electrode head during the work process, and at the same time effectively improving the service life of the welding electrode head. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the welding device of the present invention;

[0025] Figure 3 is a cross-sectional schematic diagram of a welding device of the present invention;

[0026] Figure 4 yes Figure 3 A local enlarged schematic diagram of the middle A;

[0027] Figure 5 is a cross-sectional schematic diagram of the welding head switching assembly of the present invention when not welding;

[0028] Figure 6 It is a cross-sectional schematic diagram of the welding head switching assembly of the present invention during welding;

[0029] Figure 7 It is an exploded schematic diagram of the welding head switching assembly of the present invention;

[0030] Figure 8 is a cross-sectional schematic diagram of a welding electrode head of the present invention;

[0031] Fig. 9It is a schematic diagram of the structure of the conversion disk of the present invention;

[0032] Fig.10 is a cross-sectional schematic diagram of the conversion disk of the present invention;

[0033] Fig.11 yes Fig.10 A partial enlarged schematic diagram of point B in the middle;

[0034] Fig.12 is a cross-sectional schematic diagram of the guide plate of the present invention;

[0035] Description of the reference numerals: 10, articulated robot; 20, welding device; 1, connecting seat; 2, welding unit; 21, welding clamp; 22, driving member; 23, welding head switching assembly; 231, conversion disk; 2311, guide cylinder; 2312, vertical groove; 2313, spiral groove; 2314, first transition step; 2315, second transition step; 232, guide disk; 2321, extrusion boss; 2322, first guide groove; 2323, fourth Spring; 2324, locking pin; 2325, circular slide groove; 2326, heat dissipation channel; 233, welding head turntable; 2331, guide shaft; 2332, protective ring platform; 2333, driving pin; 2334, fifth spring; 234, first spring; 235, welding electrode head; 2351, switching groove; 2352, memory metal block; 2353, switching slider; 2354, third spring; 236, second spring; 237, heat dissipation cavity. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the implementation scope of the present invention is not limited thereto.

[0037] like Figures 1 to 12 As shown, an automobile parts welding device described in this embodiment includes an articulated robot 10 and a welding device 20 installed on the output end of the articulated robot 10;

[0038] The welding device 20 comprises a connection base 1 and two welding units 2 symmetrically mounted on both ends of the connection base 1; each welding unit 2 comprises a welding clamp 21 slidably mounted on the connection base 1, a driving member 22 for driving the welding clamp 21 to slide, and a welding head switching assembly 23 mounted on the welding clamp 21;

[0039] The welding head switching assembly 23 includes a conversion disk 231, a guide disk 232 fixedly mounted on the conversion disk 231, and a welding head rotating disk 233 movably mounted on the conversion disk 231; the disk surface of the guide disk 232 is provided with an extrusion boss 2321, and the extrusion boss 2321 is provided with a locking structure;

[0040] A rotation driving structure capable of driving the welding head rotating disk 233 to rotate is provided between the conversion disk 231 and the welding head rotating disk 233; a first spring 234 is connected between the welding head rotating disk 233 and the guide disk 232; a plurality of welding electrode heads 235 are movably provided on the welding head rotating disk 233 along the circumferential direction; a second spring 236 is installed between the welding electrode head 235 and the welding head rotating disk 233; and a switching driving component is provided on the welding electrode head 235;

[0041] When the positions of the welding electrode head 235 and the extrusion boss 2321 correspond, the locking structure cooperates with the switching drive assembly of the welding electrode head 235 to unlockably lock the welding head turntable 233, so that when the welding head turntable 233 is in an unlocked state, the rotating drive structure drives the welding head turntable 233 to rotate.

[0042] Specifically, when the automobile parts welding equipment described in this embodiment is actually used, the driving members 22 of the two welding units 2 respectively drive the welding head switching assembly 23 to move toward the center through the welding clamp 21 to weld the workpiece, and the welding head turntable 233 is squeezed and moves relative to the conversion disk 231, and the first spring 234 is compressed. At this time, the welding electrode head 235 corresponding to the position of the squeezing boss 2321 protrudes out of the welding head turntable 233, that is, the welding electrode head 235 is in a working state, and the second spring 236 is compressed. The welding electrode head 235 that does not correspond to the position of the squeezing boss 2321 is accommodated in the space formed between the welding head turntable 233 and the guide disk 232 under the elastic force of the second spring 236, that is, it is in an idle state. The welding electrode head 235 in the working state welds the workpiece, and the locking structure cooperates with the switching drive assembly to lock the welding head turntable 233. At this time, the rotation drive structure cannot drive the welding head turntable 233 to rotate;

[0043] As the temperature of the welding electrode head 235 in the working state rises to the welding head switching threshold, the switching drive assembly and the locking structure are released from the locking cooperation. At this time, the welding head turntable 233 is in the unlocked state. After the welding head turntable 233 is out of contact with the workpiece, the first spring 234 is reset, and the rotation drive structure drives the welding head turntable 233 to rotate a unit angle, which is the angle between two adjacent welding heads. The welding electrode head 235 in the high temperature state is retracted into the welding head turntable 233 under the elastic force of the second spring 236, and the next welding electrode head 235 in the idle state is rotated to the position corresponding to the extrusion boss 2321. At this time, the next welding electrode head 235 is in the working state. When the driving member 22 drives the welding head turntable 233 to contact the workpiece again, the replaced welding electrode head 235 corresponding to the position of the extrusion boss 2321 protrudes out of the welding head turntable 233 to weld the workpiece, and the replaced welding electrode head 235 is in the idle state for heat dissipation and cooling, thereby completing the automatic replacement of the welding electrode head 235.

[0044] In this embodiment, an extrusion boss 2321 is provided on the disk surface of the guide disk 232, a locking structure is provided on the extrusion boss 2321, a rotation drive structure is provided between the conversion disk 231 and the welding head turntable 233, and a switching drive component is provided on the welding electrode head 235. Therefore, when the temperature of the welding electrode head 235 is too high, the switching drive component can be disengaged from the locking cooperation with the locking structure, so that the welding head turntable 233 is in an unlocked state, and the welding head turntable 233 is driven to rotate by the rotation drive structure, so that the next welding electrode head 235 rotates to a position corresponding to the extrusion boss 2321, thereby realizing the replacement of the welding electrode head 235, effectively reducing the situation where the work progress is delayed due to the need for human intervention in replacing the welding electrode head 235 during the work process, and at the same time effectively improving the service life of the welding electrode head 235.

[0045] like Figures 4 to 7 , Figures 9 to 11 As shown, the automobile parts welding equipment described in this embodiment further has a conversion disk 231 with a recessed receiving groove, a guide cylinder 2311 is provided at the center of the receiving groove, a guide disk 232 is coaxially sleeved on the outer wall of the guide cylinder 2311, a welding head turntable 233 is located in the receiving groove, a guide shaft 2331 movably inserted into the guide cylinder 2311 is convexly provided at the center of the welding head turntable 233, and a rotation driving structure is provided on the guide cylinder 2311 and the guide shaft 2331. In this embodiment, the receiving groove is provided to facilitate the installation of the guide disk 232 and the welding head turntable 233, and the guide cylinder 2311 and the guide shaft 2331 are provided to cooperate, so that the movement of the welding head turntable 233 is more stable.

[0046] In the automobile parts welding equipment described in this embodiment, further, the driving member 22 is a driving cylinder.

[0047] For example, Figures 4 to 6 As shown, the welding head turntable 233 is provided with a limiting groove on the side facing the guide plate 232, and one end of the first spring 234 is embedded in the limiting groove, thereby limiting the first spring 234, so that the first spring 234 can be more reliably installed between the guide plate 232 and the welding head turntable 233.

[0048] It should be noted that, in the automobile parts welding equipment described in this embodiment, the cross-section of the extrusion boss 2321 is trapezoidal.

[0049] like Figures 4 to 6As shown, the automobile parts welding equipment described in this embodiment further has a protective ring 2332 protruding from one side of the welding head turntable 233 facing away from the guide plate 232 corresponding to each welding electrode head 235; the first spring 234 and the second spring 236 allow the welding electrode head 235 to be initially accommodated in the protective ring 2332. Specifically, at the beginning, since the welding head turntable 233 is not squeezed, the first spring 234 extends the welding head turntable 233 to the opening position of the accommodating groove, and the second spring 236 applies an inward elastic force to the welding electrode head 235, so that the welding electrode head 235 is accommodated in the protective ring 2332, that is, the welding electrode head 235 does not protrude from the protective ring 2332; this embodiment protects the welding electrode head 235 by providing the protective ring 2332, and can also play a protective role in the welding process of the welding electrode head 235.

[0050] like Figures 4 to 8 As shown, the automobile parts welding equipment described in this embodiment, further, the switching drive assembly includes a switching slot 2351 arranged on the welding electrode head 235, a memory metal block 2352 arranged in the switching slot 2351, a switching slider 2353 movably arranged in the switching slot 2351 and abutting against the memory metal block 2352, and a third spring 2354 connected between the switching slider 2353 and the welding electrode head 235; the third spring 2354 enables the switching slider 2353 to maintain abutment with the memory metal block 2352; when the temperature of the memory metal block 2352 reaches its phase change temperature, it can push the switching slider 2353 to overcome the elastic force of the third spring 2354 and slide to the opening position of the switching slot 2351, so that the welding head turntable 233 is in an unlocked state. The automobile parts welding equipment described in this embodiment, further, has a locking structure including a first guide groove 2322 arranged on the extrusion boss 2321, a fourth spring 2323 arranged in the first guide groove 2322, and a locking pin 2324 slidably arranged in the first guide groove 2322 and abutting against the fourth spring 2323; when the position of the welding electrode head 235 corresponds to the extrusion boss 2321 and the temperature of the memory metal block 2352 has not reached its phase change temperature, the locking pin 2324 is inserted into the switching groove 2351 under the elastic force of the fourth spring 2323, thereby locking the welding head turntable 233.

[0051] Specifically, the welding head switching threshold is the phase change temperature of the memory metal block 2352. When the positions of the welding electrode head 235 and the extrusion boss 2321 correspond, the extrusion boss 2321 generates an extrusion force on the welding electrode head 235, so that the second spring 236 is compressed. At the same time, the locking pin 2324 protrudes out of the first guide groove 2322 under the elastic force of the fourth spring 2323 and is inserted into the switching groove 2351 and abuts against the switching slider 2353, thereby locking the welding head turntable 233. Figures 4 to 6As shown;

[0052] When the welding head turntable 233 is squeezed, the welding head turntable 233 and the welding electrode head 235 move relative to each other, and the first spring 234 is compressed, so that the welding electrode head 235 protrudes out of the protective ring platform 2332, so that the workpiece can be welded. Figure 6 As shown;

[0053] During the welding process of the welding electrode head 235, when the temperature of the memory metal block 2352 reaches its phase change temperature, the memory metal block 2352 undergoes phase change and stretches, generating a thrust on the switching slider 2353, causing the third spring 2354 to be compressed. At the same time, the switching slider 2353 squeezes the locking pin 2324, causing the locking pin 2324 to move out of the switching slot 2351, thereby placing the welding head turntable 233 in an unlocked state. When the driving member 22 drives the welding clamp 21 to move away from the workpiece, the welding head turntable 233 is out of contact with the workpiece, and the first spring 234 is reset. During the resetting process of the welding head turntable 233, due to the welding head turntable 233, the welding head turntable 233 is locked. The disk 233 is in an unlocked state, and the rotating drive structure enables the welding head turntable 233 to synchronously drive each welding electrode head 235 to rotate relatively by a unit angle, so that the next welding electrode head 235 rotates to contact with the extrusion boss 2321. Since the temperature of the memory metal block 2352 of the next welding electrode head 235 has not reached its phase change temperature and is in a contracted state, the switching slider 2353 is not squeezed, so that the locking pin 2324 can be inserted into the switching slot 2351 under the elastic force of the fourth spring 2323 and abut against the switching slider 2353, thereby locking the welding head turntable 233 again;

[0054] The replaced welding electrode head 235 is in an idle state, and its temperature gradually decreases until it is lower than the phase change temperature of the memory metal block 2352. The memory metal block 2352 contracts to release the squeezing of the switching slider 2353. The third spring 2354 pushes the switching slider 2353 to reset, so that the locking pin 2324 can be inserted into the switching groove 2351 when it corresponds to the position of the extrusion boss 2321 next time.

[0055] like Figures 4 to 6 , Fig.12 As shown, the automobile parts welding equipment described in this embodiment further has a circular groove 2325 on the disk surface of the guide disk 232, and the extrusion boss 2321 is arranged in the circular groove 2325; the welding electrode head 235 is slidably connected with the circular groove 2325. In this embodiment, the circular groove 2325 is arranged to provide guidance and limit for the welding electrode head 235, and when the welding head turntable 233 drives each welding electrode head 235 to rotate, each welding electrode head 235 moves along the track of the circular groove 2325.

[0056] like Figures 4 to 6 , Fig.10 and Fig.11 As shown, the automobile parts welding equipment described in this embodiment further comprises a rotation driving structure including a driving groove arranged on the inner wall of the guide cylinder 2311 and a driving pin 2333 elastically floatingly connected to the guide shaft 2331, and the driving pin 2333 is movably embedded in the driving groove.

[0057] Specifically, in this embodiment, a driving pin 2333 and a driving slot are arranged to cooperate, so that when the welding head turntable 233 is in a locked state, the driving pin 2333 cooperates with the driving slot, and the welding head turntable 233 slides up and down relatively; when the welding head turntable 233 is in an unlocked state, the driving pin 2333 cooperates with the driving slot, so that the welding head turntable 233 can synchronously rotate during the up and down sliding process, so as to realize the replacement of the welding electrode head 235.

[0058] like Figures 9 to 11 As shown, the automobile parts welding equipment described in this embodiment, specifically, the driving groove includes a plurality of vertical grooves 2312 and a plurality of spiral grooves 2313 uniformly distributed along the circumferential direction, the vertical grooves 2312 and the spiral grooves 2313 are alternately arranged, and the plurality of vertical grooves 2312 and the plurality of spiral grooves 2313 are sequentially connected end to end; the depth of one end of the vertical groove 2312 is greater than the depth of the other end of the spiral groove 2313, and one end of the spiral groove 2313 extends into the other end of the vertical groove 2312, and the number of the vertical grooves 2312 and the number of the spiral grooves 2313 are the same as the number of the welding electrode heads 235; the end of the driving pin 2333 is provided with a guide fillet;

[0059] The vertical groove 2312 is provided with a first transition step 2314 between its two ends, and the other end of the vertical groove 2312 is provided with a second transition step 2315 at the intersection with the spiral groove 2313, which is lower than the first transition step 2314, and the height of the second transition step 2315 is equal to the radius of the guide fillet.

[0060] Specifically, in order to facilitate the explanation of the working process of the embodiment of the present invention, the end of the vertical groove 2312 with a larger depth is defined as the A end, and the end of the vertical groove 2312 with a smaller depth is defined as the O end; initially, the first spring 234 is in a natural state, the driving pin 2333 is located at the A end, and the welding head turntable 233 is in a locked state; when the welding head turntable 233 is squeezed, the first spring 234 is compressed, the guide shaft 2331 gradually penetrates into the guide cylinder 2311, and the driving pin 2333 passes over the first transition step from the A end 2314 and the second transition step 2315, and then enter the O end position. When the first spring 234 is reset, the guide shaft 2331 gradually extends out of the guide cylinder 2311. At this time, since the welding head turntable 233 is in a locked state, the driving pin 2333 moves along the track of the vertical slot 2312. The driving pin 2333 passes over the second transition step 2315 and the first transition step 2314 and then returns to the A end. This goes back and forth, and the driving pin 2333 reciprocates along the track of the vertical slot 2312 driven by the welding head turntable 233.

[0061] When the temperature of the memory metal block 2352 reaches the phase change temperature of the memory metal block 2352, the driving pin 2333 is located at the O end position, and the memory metal block 2352 produces phase change elongation, so that the locking pin 2324 is pushed out of the switching groove 2351, so that the welding head turntable 233 is in an unlocked state. At this time, the guide shaft 2331 gradually extends out of the guide cylinder 2311 again. Since the welding head turntable 233 has rotational freedom, under the obstruction of the second transition step 2315 and the cooperation of the driving pin 2333 and the spiral groove 2313, the driving pin 2333 moves along the trajectory of the spiral groove 2313, thereby generating a rotational torque on the welding head turntable 233, causing the welding head turntable 233 to rotate relatively, and the driving pin 2333 enters the spiral groove 2313, so that with the extension movement of the guide shaft 2331, the welding head turntable 233 rotates synchronously relatively, thereby driving the welding electrode head 235 to rotate, thereby realizing the replacement of the welding electrode head 235.

[0062] like Figures 4 to 6 As shown, the automobile parts welding equipment described in this embodiment further has a second guide groove opened in the radial direction on the guide shaft 2331, a fifth spring 2334 is arranged in the second guide groove, the driving pin 2333 is slidably inserted into the second guide groove and abuts against the fifth spring 2334, and the fifth spring 2334 keeps the driving pin 2333 abutting against the driving groove. In this embodiment, the second guide groove is arranged to provide guidance and limit for the driving pin 2333, and the fifth spring 2334 is arranged to keep the driving pin 2333 in cooperation with the driving groove.

[0063] like Figures 4 to 6As shown, the automobile parts welding equipment described in this embodiment further forms a heat dissipation cavity 237 between the guide plate 232 and the welding head turntable 233, and the guide plate 232 is provided with a heat dissipation channel 2326, one end of the heat dissipation channel 2326 is connected to the heat dissipation cavity 237, and the other end of the heat dissipation channel 2326 is connected to the outside atmosphere.

[0064] Specifically, when the welding head turntable 233 slides into the receiving groove, the effective volume of the heat dissipation cavity 237 is reduced, so that the gas in the heat dissipation cavity 237 is discharged to the outside atmosphere through the heat dissipation channel 2326 to take away the heat of the heat dissipation cavity 237 and achieve a heat dissipation effect; when the welding head turntable 233 extends outward from the receiving groove, the effective volume of the heat dissipation cavity 237 increases and the pressure decreases, and the outside atmosphere enters the heat dissipation cavity 237 through the heat dissipation channel 2326, thereby inhaling the outside cold air to cool down each welding electrode head 235, so that the temperature of the memory metal block 2352 on the welding electrode head 235 after switching from the working state to the idle state is reduced, so that the memory metal block 2352 is cooled and reset for the next welding.

[0065] like Figure 2 and Figure 3 As shown, the automobile parts welding equipment described in this embodiment, further, is provided with a slide rail on the connecting seat 1, and the welding clamp 21 is slidably connected to the slide rail. The slide rail provides guidance and limitation for the welding clamp 21, so that the movement of the welding clamp 21 is more stable during movement.

[0066] The above is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the protection scope of the patent application of the present invention.

Claims

1. An automobile parts welding equipment, characterized in that: It includes an articulated robot and a welding device arranged on the output end of the articulated robot; The welding device comprises a connecting seat and two welding units symmetrically arranged at both ends of the connecting seat; the welding unit comprises a welding clamp slidably arranged on the connecting seat, a driving member for driving the welding clamp to slide, and a welding head switching assembly arranged on the welding clamp; The welding head switching assembly includes a conversion disk, a guide disk arranged on the conversion disk, and a welding head rotating disk movably arranged on the conversion disk; the disk surface of the guide disk is provided with an extrusion boss, and the extrusion boss is provided with a locking structure; A rotating drive structure capable of driving the welding head turntable to rotate is provided between the conversion disk and the welding head turntable; a first spring is connected between the welding head turntable and the guide disk, a plurality of welding electrode heads are movably provided on the welding head turntable along the circumferential direction, a second spring is provided between the welding electrode head and the welding head turntable, and a switching drive assembly is provided on the welding electrode head; When the positions of the welding electrode head and the extrusion boss correspond, the locking structure cooperates with the switching drive assembly of the welding electrode head to unlockably lock the welding head turntable, so that when the welding head turntable is in an unlocked state, the rotation drive structure drives the welding head turntable to rotate; The switching drive assembly includes a switching slot arranged on the welding electrode head, a memory metal block arranged in the switching slot, a switching slider movably arranged in the switching slot and abutting against the memory metal block, and a third spring connected between the switching slider and the welding electrode head; the third spring enables the switching slider to maintain a state of abutting against the memory metal block; when the temperature of the memory metal block reaches its phase change temperature, it can push the switching slider to overcome the elastic force of the third spring and slide to the opening position of the switching slot, so that the welding head turntable is in an unlocked state; The locking structure includes a first guide groove arranged on the extrusion boss, a fourth spring arranged in the first guide groove, and a locking pin slidably arranged in the first guide groove and abutting against the fourth spring; when the positions of the welding electrode head and the extrusion boss correspond and the temperature of the memory metal block does not reach its phase change temperature, the locking pin is inserted into the switching groove under the elastic force of the fourth spring, thereby locking the welding head turntable; The rotary drive structure comprises a drive groove arranged on the inner wall of the guide cylinder and a drive pin elastically and floatingly connected to the guide shaft, and the drive pin is movably embedded in the drive groove; The driving groove includes a plurality of vertical grooves and a plurality of spiral grooves uniformly distributed along the circumferential direction, the vertical grooves and the spiral grooves are alternately arranged, and the plurality of vertical grooves and the plurality of spiral grooves are sequentially connected end to end; the depth of one end of the vertical groove is greater than the depth of the other end of the spiral groove, one end of the spiral groove extends into the other end of the vertical groove, and the number of the vertical grooves and the number of the spiral grooves are the same as the number of the welding electrode heads; the end of the driving pin is provided with a guide fillet; The vertical groove is provided with a first transition step between its two ends, and the other end of the vertical groove is provided with a second transition step at the intersection with the spiral groove, the second transition step having a height lower than the first transition step, and the height of the second transition step is equal to the radius of the guide fillet; The guide shaft is provided with a second guide groove in the radial direction, a fifth spring is arranged in the second guide groove, the driving pin is slidably inserted into the second guide groove and abuts against the fifth spring, and the fifth spring keeps the driving pin abutting against the driving groove.

2. The automobile parts welding equipment according to claim 1, characterized in that: The conversion disk is recessed with a receiving groove, a guide cylinder is arranged at the center of the receiving groove, the guide disk is coaxially sleeved on the outer wall of the guide cylinder, the welding head turntable is located in the receiving groove, a guide shaft movably inserted into the guide cylinder is convexly arranged at the center of the welding head turntable, and a rotary drive structure is arranged on the guide cylinder and the guide shaft.

3. The automobile parts welding equipment according to claim 1, characterized in that: A protective ring platform is protrudingly provided on one side of the welding head rotating disk facing away from the guide disk corresponding to each welding electrode head; the first spring and the second spring allow the welding electrode head to be initially accommodated in the protective ring platform.

4. The automobile parts welding equipment according to claim 1, characterized in that: A circular slide groove is arranged on the plate surface of the guide plate, and the extrusion boss is arranged in the circular slide groove; the welding electrode head is slidably connected with the circular slide groove.

5. The automobile parts welding equipment according to claim 1, characterized in that: A heat dissipation cavity is formed between the guide disk and the welding head rotating disk. The guide disk is provided with a heat dissipation channel. One end of the heat dissipation channel is connected with the heat dissipation cavity, and the other end of the heat dissipation channel is connected with the outside atmosphere.

6. The automobile parts welding equipment according to claim 1, characterized in that: The driving member is a driving cylinder.

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