Variable frequency capacitor pin resistance welding device

Abstract

The present application relates to the technical field of variable frequency capacitor pin welding, and particularly relates to a variable frequency capacitor pin resistance welding device, which comprises a welding assembly, a moving module, a conveying module, and a first clamping assembly arranged at the output end of the moving module, wherein the first clamping assembly comprises two first telescopic cylinders oppositely arranged on a mounting plate, a support frame is arranged on the cylinder body of the first telescopic cylinder, two opposite claw bodies are rotatably arranged on the support frame, a poking plate is arranged at the output end of the first telescopic cylinder, and the first telescopic cylinder is used to drive the poking plate to lift up and down to release or clamp the two claw bodies. When welding, the whole variable frequency device is clamped by the second clamping assembly, and the two poking plates are controlled by the first telescopic cylinder to lift up and down to release or clamp the two claw bodies, so that the pin is clamped, and when the variable frequency device is moved to the welding head for welding, the pin is clamped during movement and is not prone to deformation, so as to improve the welding efficiency.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of resistance welding of capacitor pins of a frequency converter, and particularly relates to a resistance welding device for capacitor pins of a frequency converter. BACKGROUND

[0002] The frequency converter is a power control device for controlling an alternating current motor by changing the frequency of a power supply of the motor through application of frequency conversion technology and microelectronic technology. The capacitor is an important component of the frequency converter, and the performance of the capacitor directly affects the operation of the frequency converter. When the frequency converter is assembled, the capacitor and the pins of the frequency converter need to be welded, and the welding is usually performed by using a resistance welding device.

[0003] However, the prior art has the following problems: when the frequency converter is moved to the welding head for welding, the entire frequency converter is usually clamped, but the pins on the frequency converter lack protection during the movement, and are prone to deformation, thereby affecting the welding efficiency. SUMMARY

[0004] The application solves the technical problem by adopting the technical scheme of providing a resistance welding device for capacitor pins of a frequency converter, which comprises:

[0005] A welding assembly, which comprises an adjusting module and a welding head arranged at the output end of the adjusting module, and the adjusting module is used to drive the welding head to move close to the frequency converter;

[0006] A moving module, which is provided with a mounting plate at the output end, and the mounting plate is provided with a first clamping assembly and a second clamping assembly, the first clamping assembly is used to clamp the pin, the second clamping assembly is used to clamp the frequency converter, and the moving module is used to move the frequency converter;

[0007] The first clamping assembly comprises two first telescopic cylinders arranged oppositely on the mounting plate, a support frame is arranged on the cylinder body of the first telescopic cylinder, two opposite claw bodies are rotatably arranged on the support frame, the pin is located between the two claw bodies, a poking plate is arranged at the output end of the first telescopic cylinder, the first telescopic cylinder is used to drive the poking plate to ascend and descend to loosen or clamp the two claw bodies;

[0008] A conveying module, which is provided with a carrier disc for placing the frequency converter at the output end, and the conveying module is used to drive the frequency converter to move to correspond to the welding head.

[0009] Further, the poking plate comprises a main body connected with the first telescopic cylinder and a poking part, the claw body is provided with a contact surface one corresponding to the poking part, and the first telescopic cylinder drives the poking part to descend to contact the contact surface one and makes the claw body rotate towards the pin.

[0010] Further, the support frame is provided with a mounting block, the mounting block is provided with a mounting protrusion corresponding to the groove on the pin, and the mounting protrusion is located between the two claw bodies.

[0011] Further, the second clamping assembly comprises a clamping claw cylinder and two opposite clamping blocks arranged at the output end of the clamping claw cylinder, the clamping blocks are matched with the frequency converter, and the clamping claw cylinder is used to drive the clamping blocks to clamp the frequency converter.

[0012] Further, the moving module is provided in two groups, and the two groups of moving modules are respectively used to move the frequency converter to the loading disc and move the frequency converter from the loading disc to the next process.

[0013] Further, the welding head comprises oppositely arranged first and second electrode heads, the adjusting module comprises a lifting cylinder I, a mounting bracket arranged at the output end of the lifting cylinder I, and a horizontal moving module arranged on the mounting bracket, the output end of the horizontal moving module is provided with a support plate, the first electrode head is connected with the support plate, the support plate is provided with a moving cylinder, the output end of the moving cylinder is connected with the second electrode head, the first electrode head is in contact with the connection position of the pin and the capacitor, the moving cylinder is used to drive the second electrode head to move to the contact position of the pin and the capacitor, and the second electrode head and the first electrode head cooperate with each other to weld the connection position of the pin and the capacitor.

[0014] Further, the support plate is further provided with an air inlet pipe, the air inlet pipe is connected with an air pump, the air inlet pipe faces the first electrode head and the second electrode head, and the air inlet pipe is used to introduce protective gas.

[0015] Further, the mounting plate comprises a plate body I connected with the output end of the moving module and a plate body II slidingly arranged on the plate body I, the plate body I is provided with a sliding rail for sliding of the plate body II, the plate body II is connected with the clamping claw cylinder and the first telescopic cylinder, the plate body I is provided with a limiting rod, the plate body II is provided with a limiting groove matched with the limiting rod, and the plate body II slides to the state that the limiting rod is clamped in the limiting groove.

[0016] Further, the plate body I is provided with a rubber plug and a positioning hole I, the rubber plug is arranged in the positioning hole I, the plate body II is provided with a positioning hole II corresponding to the positioning hole I, and the rubber plug is inserted into the positioning hole II from the positioning hole I.

[0017] The beneficial effects of the present application are: provide a kind of variable frequency drive capacitor pin resistance welding device, including welding assembly, mobile module and conveying module, and the first clamping assembly of mobile module output, the first clamping assembly includes two first telescopic cylinders oppositely arranged on mounting plate, support frame is equipped on the cylinder of first telescopic cylinder, two opposite claw bodies are rotatably arranged on support frame, the output end of first telescopic cylinder is equipped with actuating plate, and first telescopic cylinder is used to drive actuating plate to lift to release or clamp two claw bodies.Welding, while being clamped by second clamping assembly to entire variable frequency drive, by the first telescopic cylinder control two actuating plate lift to release or clamp two claw bodies, so as to realize the clamping of pin, so that when variable frequency drive is moved to welding head and welded, pin is clamped when moving, not easy to be deformed and affect welding efficiency, so as to improve welding efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application will be further described below in conjunction with the drawings and examples.

[0019] In the drawings: Figure 1 The overall structure diagram of a variable frequency drive capacitor pin resistance welding device provided by the present application is shown.

[0020] Figure 2 For Figure 1 The enlarged view of A in the figure is shown.

[0021] Figure 3 For Figure 1 The top view of the variable frequency drive capacitor pin resistance welding device shown is shown.

[0022] Figure 4 For Figure 1 The perspective view of part of the structure is shown.

[0023] Figure 5 For Figure 4 The perspective view of the structure hidden support frame is shown.

[0024] Figure 6 For Figure 4 The partial cross-sectional view of the structure is shown.

[0025] Figure 7 For Figure 6 The partial cross-sectional view of the structure after claw body clamping is shown.

[0026] Figure 8 For Figure 1 The perspective view of welding assembly and conveying module is shown.

[0027] Figure 9 For Figure 1 The perspective view of mounting plate and second clamping assembly is shown.

[0028] Figure 10 Fig. 2 is a perspective view of the mounting plate and the second clamping assembly shown in Fig. 1, as viewed from another angle; Figure 9 Fig. 3 is a sectional view of the mounting plate shown in Fig. 2.

[0029] Figure 11 Fig. 4 is a sectional view of the mounting plate shown in Fig. 3. Figure 9

[0030] Reference signs: 100, frequency converter capacitor pin resistance welding device; 11, adjusting module; 111, lifting cylinder one; 112, mounting frame; 113, horizontal moving module; 114, support plate; 1141, moving cylinder; 1142, air inlet pipe; 121, first electrode head; 122, second electrode head; 21, mounting plate; 211, plate body one; 2111, sliding rail; 2112, limiting rod; 2113, rubber plug; 2114, positioning hole one; 212, plate body two; 2121, limiting groove; 2122, positioning hole two; 22, first clamping assembly; 221, first telescopic cylinder; 222, support frame; 2221, mounting block; 2222, mounting protrusion; 223, claw body; 2231, contact surface one; 2232, rotation center; 224, actuating plate; 2241, main body; 2242, actuating part; 23, second clamping assembly; 231, clamping claw cylinder; 232, clamping block; 2321, clamping groove; 24, first lead screw transmission structure; 25, lifting cylinder two; 30, conveying module; 31, carrier disc; 32, X-axis moving module; 33, Y-axis moving module; 40, rack; 200, frequency converter; 201, pin; 2011, groove; 202, capacitor. DETAILED DESCRIPTION

[0031] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects clearer, the present application will be described in detail with reference to the drawings. The drawings are simplified schematic diagrams, and only illustrate the basic of the present application in a schematic manner, and therefore only show the structures related to the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] Please refer to Figures 1-11 , a frequency converter capacitor pin resistance welding device 100 is provided, which comprises a welding assembly, a moving module and a conveying module 30, and a rack 40 for carrying various devices.

[0033] The welding assembly comprises an adjusting module 11 and a welding head arranged at the output end of the adjusting module 11, and the adjusting module 11 is used to drive the welding head to move close to the frequency converter 200.

[0034] ​Further, the welding head comprises the oppositely arranged first electrode head 121 and second electrode head 122, the adjusting module 11 comprises the lifting cylinder one 111, the mounting rack 112 arranged at the output end of the lifting cylinder one 111 and the horizontal moving module 113 arranged on the mounting rack 112, the output end of the horizontal moving module 113 is provided with the support plate 114, the support plate 114 is provided with the moving cylinder 1141, the output end of the moving cylinder 1141 is fixedly connected with the second electrode head 122, and the moving cylinder 1141 is used for driving the second electrode head 122 to move to contact the connection position of the pin 201 and the capacitor 202. Specifically, the welding assembly further comprises the power supply structure for supplying power to the first electrode head 121 and the second electrode head 122, the power supply structure is a prior art, and details are not described herein.

[0035] During welding, the connection position of the pin 201 and the capacitor 202 is arranged between the first electrode head 121 and the second electrode head 122, the first electrode head 121 is in contact with the connection position, and the moving cylinder 1141 controls the second electrode head 122 to be in contact with the connection position. The power supply structure supplies power to the first electrode head 121 and the second electrode head 122, so that an electric current is generated between the first electrode head 121 and the second electrode head 122, the electric current passes through the connection position of the pin 201 and the capacitor 202 and generates heat, so that the pin 201 and the capacitor 202 are welded together.

[0036] Further, the support plate 114 is further provided with the air inlet pipe 1142, the air inlet pipe 1142 is connected with an air pump, the air pump is not shown in the figure, the air inlet pipe 1142 is used for introducing protective gas, and the air inlet pipe 1142 faces the first electrode head 121 and the second electrode head 122. Specifically, in the embodiment, the protective gas is argon, and the protective gas introduced by the air inlet pipe 1142 can remove dust and oxides around the weld, so that the welding material can be better bonded with the welding position, thereby improving the welding quality. Meanwhile, the protective gas can protect the weld pool, reduce oxidation, reduce spatter during welding, and make the weld more uniform and beautiful.

[0037] The output end of the moving module is provided with the mounting plate 21, the mounting plate 21 is provided with the first clamping assembly 22 and the second clamping assembly 23, the first clamping assembly 22 is used for clamping the pin 201, the second clamping assembly 23 is used for clamping the frequency converter 200, and the moving module is used for moving the frequency converter 200. Specifically, in the embodiment, the moving module comprises two groups, and the two groups of moving modules are respectively used for moving the frequency converter 200 to the loading plate 31 and moving the frequency converter 200 from the loading plate 31 to the next process. The two groups of moving modules each comprise the first lead screw transmission structure 24 arranged along the width direction of the rack 40 and the lifting cylinder two 25 arranged at the output end of the first lead screw transmission structure 24, and the output end of the lifting cylinder two 25 is fixedly connected with the mounting plate 21.

[0038] Further, the first clamping assembly 22 comprises two first telescopic cylinders 221 oppositely arranged on the mounting plate 21, a support frame 222 is arranged on the cylinder body of the first telescopic cylinder 221, two opposite claw bodies 223 are rotatably arranged on the support frame 222, the pin 201 is located between the two claw bodies 223, a poking plate 224 is arranged at the output end of the first telescopic cylinder 221, and the first telescopic cylinder 221 is used to drive the poking plate 224 to ascend and descend to release or clamp the two claw bodies 223.

[0039] Please refer to Figure 6 and Figure 7 Further, the poking plate 224 comprises a main body 2241 fixedly connected with the output end of the first telescopic cylinder 221 and a poking part 2242, the claw body 223 is provided with a contact surface one 2231 corresponding to the poking part 2242, and the first telescopic cylinder 221 drives the poking part 2242 to descend to contact the contact surface one 2231 and make the claw body 223 rotate towards the pin 201. Specifically, in the embodiment, the two first telescopic cylinders 221 correspond to the two capacitors 202 on the frequency converter 200 respectively, the corresponding poking part 2242 of each first telescopic cylinder 221 is provided with two groups, each group of the poking part 2242 corresponds to the pin 201 connected with the positive electrode of the capacitor 202 and the pin 201 connected with the negative electrode of the capacitor 202 respectively, each group comprises two poking parts 2242 arranged along the width direction of the main body 2241, and each group of the poking part 2242 corresponds to two oppositely arranged claw bodies 223.

[0040] Further, for easy reference, the center axis of the claw body 223 is shown by a dashed line passing through the rotation center 2232 of the claw body 223 in Figure 6 and Figure 7 The contact surface one 2231 is located at the top end of the claw body 223, and the contact surface one 2231 is arranged obliquely, the poking part 2242 is provided with a contact surface two having the same inclination angle as the contact surface one 2231, the upper half of the contact surface one 2231 is closer to the center axis of the claw body 223 than the lower half of the contact surface one 2231, when the poking part 2242 descends, the bottom end of the poking part 2242 contacts the upper half of the contact surface one 2231, with the descent of the poking part 2242, the upper half of the contact surface one 2231 gradually rotates towards the center axis, and the lower half of the contact surface one 2231 gradually rotates away from the center axis, so as to clamp the pin 201, on the contrary, when the poking part 2242 ascends, the upper half of the contact surface one 2231 gradually rotates away from the center axis, and the lower half of the contact surface one 2231 gradually rotates towards the center axis, so as to release the clamping of the pin 201.

[0041] When welding, the two paw bodies 223 are controlled to be loosened or clamped by the first telescopic cylinder 221 to clamp the pins 201 while the entire frequency converter 200 is clamped by the second clamping assembly 23, so that the pins 201 are clamped during the transfer to the welding head for welding, and deformation of the pins 201 is less likely to occur, thereby improving the welding efficiency.

[0042] The second clamping assembly 23 includes a clamping jaw cylinder 231 and two opposite clamping blocks 232 provided on the output end of the clamping jaw cylinder 231, the clamping blocks 232 are matched with the frequency converter 200, and the clamping jaw cylinder 231 is used to drive the clamping blocks 232 to clamp the frequency converter 200. Specifically, in the embodiment, the main body 2241 of the frequency converter 200 includes a square plate and an elliptical cylinder, and one of the clamping blocks 232 is provided with a clamping groove 2321 matched with the square plate of the frequency converter 200. When the frequency converter 200 is clamped, the square plate of the frequency converter 200 is inserted into the clamping groove 2321, and the end face of the elliptical cylinder of the frequency converter 200 is in contact with the other clamping block 232.

[0043] Further, the support frame 222 is provided with a mounting block 2221, the mounting block 2221 is provided with a mounting protrusion 2222 corresponding to the groove 2011 on the pin 201, and the mounting protrusion 2222 is located between the two paw bodies 223. The mounting protrusion 2222 is used to further limit the pin 201 and reduce the deformation of the pin 201.

[0044] The mounting plate 21 includes a plate body one 211 connected with the output end of the moving module and a plate body two 212 slidingly provided on the plate body one 211, the plate body one 211 is provided with a sliding rail 2111 for the sliding of the plate body two 212, the plate body two 212 is fixedly connected with the clamping jaw cylinder 231 and the first telescopic cylinder 221, the plate body one 211 is provided with a limiting rod 2112, the plate body two 212 is provided with a limiting groove 2121 matched with the limiting rod 2112, and the plate body two 212 slides to the state that the limiting rod 2112 is clamped in the limiting groove 2121.

[0045] The plate body one 211 is provided with a rubber plug 2113 and a positioning hole one 2114, the rubber plug 2113 is arranged in the positioning hole one 2114, the plate body two 212 is provided with a positioning hole two 2122 corresponding to the positioning hole one 2114, and the rubber plug 2113 is inserted into the positioning hole two 2122 from the positioning hole one 2114.

[0046] When the first clamping assembly 22 and the second clamping assembly 23 need to be replaced, the limiting rod 2112 and the rubber plug 2113 are removed first, and then the plate body two 212 is pulled out along the slide rail 2111, so that the first clamping assembly 22 and the second clamping assembly 23 can be replaced. When the plate body two 212 is installed, the plate body two 212 is slid along the slide rail 2111 until the limiting rod 2112 is clamped into the limiting groove 2121, and then the rubber plug 2113 is inserted into the positioning hole two 2122 from the positioning hole one 2114, so that the fixing of the plate body two 212 is completed.

[0047] The output end of the conveying module 30 is provided with a carrier disc 31 for placing the frequency converter 200, and the conveying module 30 is used to drive the frequency converter 200 to move to correspond to the welding head. Specifically, in the embodiment, the conveying module 30 includes an X-axis moving module 32 arranged along the length direction of the rack 40 and a Y-axis moving module 33 arranged along the width direction of the rack 40, and the X-axis moving module 32 and the Y-axis moving module 33 are both screw transmission structures.

Claims

1. A variable frequency drive capacitor pin resistance welding apparatus, characterized by, The utility model relates to a welding assembly, the welding assembly includes the adjustment module and the welding head of setting in the output of adjustment module, the adjustment module is used for driving the welding head moves close to frequency converter, The output of mobile module is equipped with the mounting plate, and the first clamping assembly and the second clamping assembly are arranged on the mounting plate, the first clamping assembly is used for clamping pin, the second clamping assembly is used for clamping frequency converter, and the mobile module is used for shifting the load to frequency converter, The first clamping assembly includes two first telescopic cylinders oppositely arranged on the mounting plate, a support frame is arranged on the cylinder body of the first telescopic cylinder, two opposite claw bodies are rotatably arranged on the support frame, the pin is located between the two claw bodies, a poking plate is arranged on the output end of the first telescopic cylinder, the first telescopic cylinder is used to drive the poking plate to rise and fall to loosen or clamp the two claw bodies, the poking plate includes a main body connected with the output end of the first telescopic cylinder and a poking part, the claw body is provided with a contact surface one corresponding to the poking part, the first telescopic cylinder drives the poking part to descend to contact the contact surface one and makes the claw body rotate towards the pin, the contact surface one is located at the top end of the claw body, the contact surface one is inclined, the poking part is provided with a contact surface two with the same inclination angle as the contact surface one, the upper half of the contact surface one is closer to the central axis of the claw body than the lower half of the contact surface one, when the poking part descends, the bottom end of the poking part contacts the upper half of the contact surface one, as the poking part descends, the upper half of the contact surface one gradually rotates towards the central axis, and the lower half of the contact surface one gradually rotates away from the central axis, thereby clamping the pin, the support frame is provided with a mounting block, the mounting block is provided with a mounting protrusion corresponding to the groove on the pin, the mounting protrusion is located between the two claw bodies, each first telescopic cylinder corresponds to two groups of poking parts, each group includes two poking parts arranged along the width direction of the main body, and each group of poking parts corresponds to two oppositely arranged claw bodies, the second clamping assembly includes a clamping cylinder and two opposite clamping blocks arranged on the output end of the clamping cylinder, the clamping blocks are matched with the frequency converter, and the clamping cylinder is used to drive the clamping blocks to clamp the frequency converter, two opposite first telescopic cylinders are respectively located at the lower part of two sides of the mounting plate, and two opposite clamping blocks are located at the lower part of the other two sides of the mounting plate, The output end of the conveying module is provided with a carrier disc for placing the frequency converter, and the conveying module is used to drive the frequency converter to move to correspond to the welding head. The mobile module is provided with two groups, and the two groups of mobile modules are respectively used to shift the load of the frequency converter to the carrier disc and shift the load of the frequency converter from the carrier disc to the next process.

2. The variable frequency capacitor foot resistance welding apparatus of claim 1, wherein: ​ 3. The variable frequency capacitor pin resistance welding apparatus of claim 1, wherein: The welding head comprises oppositely arranged first and second electrode heads, the adjusting module comprises a lifting cylinder one, a mounting frame arranged at the output end of the lifting cylinder one and a horizontal moving module arranged on the mounting frame, the output end of the horizontal moving module is provided with a support plate, the first electrode head is connected with the support plate, the support plate is provided with a moving cylinder, the output end of the moving cylinder is connected with the second electrode head, the first electrode head is in contact with the connecting position of the pin and the capacitor, the moving cylinder is used for driving the second electrode head to move to be in contact with the connecting position of the pin and the capacitor, and the second electrode head and the first electrode head are matched with each other to weld the connecting position of the pin and the capacitor.

4. The variable frequency capacitor pin resistance welding apparatus of claim 3, wherein: The support plate is further provided with an air inlet pipe, the air inlet pipe is connected with an air pump, the air inlet pipe faces the first electrode head and the second electrode head, and the air inlet pipe is used for introducing protective gas.

5. The variable frequency capacitor pin resistance welding apparatus of claim 1 wherein: The mounting plate comprises a plate body one connected with the output end of the moving module and a plate body two slidingly arranged on the plate body one, the plate body one is provided with sliding rails for sliding of the plate body two, the plate body two is connected with the clamping jaw cylinder and the first telescopic cylinder, the plate body one is provided with a limiting rod, the plate body two is provided with a limiting groove matched with the limiting rod, and the plate body two slides to the state that the limiting rod is clamped into the limiting groove.

6. The variable frequency capacitor pin resistance welding apparatus of claim 5, wherein: The plate body one is provided with a rubber plug and a positioning hole one, the rubber plug is arranged in the positioning hole one, the plate body two is provided with a positioning hole two corresponding to the positioning hole one, and the rubber plug is inserted into the positioning hole two from the positioning hole one.

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