Multi-degree-of-freedom workpiece positioning clamp of spot welding machine

Abstract

The utility model relates to the technical field of spot welding machines, in particular to a multi-degree-of-freedom workpiece positioning clamp of a spot welding machine, which comprises a spot welding machine shell, a clamping assembly, a servo motor and a stepping motor, and a first welding head and a second welding head are respectively arranged at the upper end and the lower end of one side of the spot welding machine shell. A U-shaped mounting frame is fixed to the position, located between the first welding head and the second welding head, of one side of the spot welding machine shell, a servo motor is arranged at one end in the U-shaped mounting frame, the output end of the servo motor is connected with a lead screw, the periphery of the lead screw is sleeved with a screw block, and a stepping motor is mounted at the top of the screw block; the output end of the stepping motor is connected with a connecting rod; the novel multi-degree-of-freedom workpiece positioning clamp can clamp a workpiece, drive the workpiece to rotate at multiple angles and drive the workpiece to move left and right, so that the degree of freedom of the workpiece during movement can be effectively increased, and the welding precision and quality can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of spot welding machine technology, and specifically to a multi-degree-of-freedom workpiece positioning fixture for spot welding machines. Background Technology

[0002] Spot welding machines are welding equipment that achieves rapid connection of thin metal plates through resistance heating. By applying current and pressure through electrodes, the contact points of the workpieces melt instantly and cool to form weld points. No filler material is required, the welding speed is fast and does not damage the internal structure of the workpiece. The welding speed is even faster, making it suitable for mass production. It is widely used in automotive body welding, home appliance metal part assembly, and electronic component and PCB board connection.

[0003] However, existing spot welding machines lack a structure for clamping and rotating workpieces at multiple angles, and do not have the function of driving workpieces to move left and right. The workpieces have limited degrees of freedom during movement, resulting in poor welding accuracy and quality. Therefore, we propose a multi-degree-of-freedom workpiece positioning fixture for spot welding machines. Utility Model Content

[0004] To address the problems in the existing technology, this utility model provides a multi-degree-of-freedom workpiece positioning fixture for spot welding machines. This new multi-degree-of-freedom workpiece positioning fixture can clamp the workpiece and drive it to rotate at multiple angles, and can also drive the workpiece to move left and right, thereby effectively expanding the degree of freedom of the workpiece during movement, and thus effectively improving the accuracy and quality of welding.

[0005] The technical solution adopted by this utility model to solve its technical problem is a multi-degree-of-freedom workpiece positioning fixture for a spot welding machine, including a spot welding machine housing, a clamping assembly, a servo motor and a stepper motor. A first welding head and a second welding head are respectively provided at the upper and lower ends of one side of the spot welding machine housing. A U-shaped mounting bracket is fixed on one side of the spot welding machine housing between the first welding head and the second welding head. A servo motor is provided at one end inside the U-shaped mounting bracket. A lead screw is connected to the output end of the servo motor. A lead screw block is sleeved around the lead screw. A stepper motor is installed on the top of the lead screw block. A connecting rod is connected to the output end of the stepper motor.

[0006] A clamping assembly is provided between the No. 1 welding head and the No. 2 welding head. The clamping assembly includes a No. 1 clamp, a No. 2 clamp, and an ear plate. One side of the No. 1 clamp is connected to the connecting rod, and the No. 2 clamp is located on the other side of the No. 1 clamp. Ear plates are fixed at both ends of the No. 1 clamp and the No. 2 clamp.

[0007] By adopting the above technical solution, this novel multi-degree-of-freedom workpiece positioning fixture can clamp the workpiece and drive it to rotate at multiple angles, and can also drive the workpiece to move left and right, thereby effectively expanding the degree of freedom of the workpiece during movement, and thus effectively improving the accuracy and quality of welding.

[0008] Specifically, the clamping assembly also includes fastening screws and nuts, which are respectively located on the outside of clamp number one and clamp number two.

[0009] By adopting the above technical solution, personnel can connect clamp number one and clamp number two by passing the fastening screw through the ear plate and placing the nut around the fastening screw.

[0010] Specifically, a knob bolt is provided on one side of the second clamp through a bolt hole.

[0011] By adopting the above technical solution, when personnel tighten the knob bolt, the knob bolt can be driven to move closer to the workpiece, thereby further improving the stability of the workpiece.

[0012] Specifically, a mounting base is fixed to the upper end of one side of the spot welding machine housing, and a welding head mounting arm is connected to one side of the mounting base. The welding head is mounted at the bottom of one end of the welding head mounting arm.

[0013] Specifically, a second mounting base is fixed to the lower end of one side of the spot welding machine housing, and a second welding head mounting arm is connected to one side of the second mounting base. The second welding head is installed at the bottom of one end of the second welding head mounting arm.

[0014] Specifically, the U-shaped mounting bracket has a slide rail at its inner bottom, and the bottom of the wire block is located inside the slide rail.

[0015] The beneficial effects of this utility model are:

[0016] The multi-degree-of-freedom workpiece positioning fixture for spot welding machines described in this utility model has a first clamp and a second clamp that can hold the workpiece, and a knob bolt that can further fix the workpiece, thereby effectively enhancing the stability of the workpiece. The end of the knob bolt is provided with an anti-slip pad made of silicone material, which can fit tightly with the edge of the workpiece and avoid severe friction with the workpiece.

[0017] The multi-degree-of-freedom workpiece positioning fixture for spot welding machines described in this utility model allows the stepper motor to drive the clamping assembly and the workpiece inside the clamping assembly to rotate during the welding process via a connecting rod. This facilitates spot welding operations on other positions on the workpiece. Simultaneously, through the transmission cooperation of the servo motor, lead screw, and lead block, it is easy for personnel to perform spot welding operations on the workpiece again, thereby ensuring a more thorough spot welding effect. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the clamping component connection structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the servo motor structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of the clamping component of this utility model.

[0023] In the diagram: 1. Spot welding machine housing; 2. Clamping assembly; 201. No. 1 clamp; 202. No. 2 clamp; 204. Ear plate; 205. Fastening screw; 206. Nut; 3. Servo motor; 4. No. 1 mounting base; 5. No. 1 welding head mounting arm; 6. No. 1 welding head; 7. No. 2 mounting base; 8. No. 2 welding head mounting arm; 9. No. 2 welding head; 10. Stepper motor; 11. Connecting rod; 12. Threaded block; 13. U-shaped mounting bracket; 14. Threaded screw; 15. Knob bolt; 16. Slide rail. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] To increase the degrees of freedom of workpiece movement and improve welding accuracy and quality, such as Figure 1-4 As shown, the multi-degree-of-freedom workpiece positioning fixture for spot welding machines of this utility model includes a spot welding machine housing 1, a clamping assembly 2, a servo motor 3, and a stepper motor 10. A first welding head 6 and a second welding head 9 are respectively provided at the upper and lower ends of one side of the spot welding machine housing 1. A U-shaped mounting bracket 13 is fixed on one side of the spot welding machine housing 1 and between the first welding head 6 and the second welding head 9. A servo motor 3 is provided at one end inside the U-shaped mounting bracket 13. A lead screw 14 is connected to the output end of the servo motor 3. A lead screw block 12 is sleeved around the lead screw 14. A stepper motor 10 is installed on the top of the lead screw block 12. A connecting rod 11 is connected to the output end of the stepper motor 10.

[0026] A clamping assembly 2 is provided between the first welding head 6 and the second welding head 9. The clamping assembly 2 includes a first clamp 201, a second clamp 202 and an ear plate 204. One side of the first clamp 201 is connected to the connecting rod 11, and the second clamp 202 is located on the other side of the first clamp 201. Both ends of the first clamp 201 and the second clamp 202 are fixed with ear plates 204.

[0027] When in use, clamp 201 and clamp 202 can clamp the workpiece, and the knob bolt 15 can further fix the workpiece, thereby effectively enhancing the stability of the workpiece.

[0028] During the welding process, the stepper motor 10 can drive the clamping assembly 2 and the workpiece inside the clamping assembly 2 to rotate through the connecting rod 11, so as to facilitate spot welding operations on other positions on the workpiece. At the same time, through the transmission cooperation of the servo motor 3, the lead screw 14 and the lead block 12, it is convenient for personnel to perform spot welding operations on the workpiece again, thereby ensuring a more thorough spot welding effect.

[0029] For example, such as Figure 4 As shown, the clamping assembly 2 also includes a fastening screw 205 and a nut 206, which are respectively located on the outside of the first clamp 201 and the second clamp 202.

[0030] In use, the operator passes the fastening screw 205 through the ear plate 204 and puts the nut 206 around the fastening screw 205 to connect the first clamp 201 and the second clamp 202.

[0031] For example, such as Figure 4 As shown, a knob bolt 15 is provided on one side of the second clamp 202 through a bolt hole.

[0032] When in use, tightening the knob bolt 15 will cause it to move closer to the workpiece, thereby further improving the stability of the workpiece.

[0033] For example, such as Figure 1 As shown, a No. 1 mounting base 4 is fixed to the upper end of one side of the spot welding machine housing 1. A No. 1 welding head mounting arm 5 is connected to one side of the No. 1 mounting base 4. The No. 1 welding head 6 is installed at the bottom of one end of the No. 1 welding head mounting arm 5.

[0034] In use, the No. 1 welding head 6 can be securely mounted on one side of the spot welding machine housing 1 by means of the No. 1 mounting base 4 and the No. 1 welding head mounting arm 5.

[0035] For example, such as Figure 1 As shown, a second mounting base 7 is fixed to the lower end of one side of the spot welding machine housing 1. A second welding head mounting arm 8 is connected to one side of the second mounting base 7. The second welding head 9 is installed at the bottom of one end of the second welding head mounting arm 8.

[0036] In use, the No. 2 welding head 9 can be securely mounted on one side of the spot welding machine housing 1 by means of the No. 2 mounting base 7 and the No. 2 welding head mounting arm 8.

[0037] For example, such as Figure 1 , Figure 3 As shown, the inner bottom of the U-shaped mounting bracket 13 is provided with a slide rail 16, and the bottom of the wire block 12 is located inside the slide rail 16.

[0038] In use, the slide rail 16 can limit the movement of the wire block 12, so that the wire block 12, the connecting rod 11, the clamping assembly 2 and the workpiece can all move smoothly.

[0039] When using this utility model, the operator places the workpiece to be positioned and clamped on one side of the first clamp 201, and uses the fastening screw 205 and nut 206 to securely place the workpiece between the first clamp 201 and the second clamp 202.

[0040] Furthermore, by tightening the knob bolt 15, the knob bolt 15 can be moved closer to the workpiece. The end of the knob bolt 15 is provided with an anti-slip pad made of silicone material, which can fit tightly against the edge of the workpiece and avoid severe friction with the workpiece.

[0041] Furthermore, during the welding process, the stepper motor 10 can drive the clamping assembly 2 and the workpiece inside the clamping assembly 2 to rotate via the connecting rod 11, so as to perform spot welding operations on other positions on the workpiece.

[0042] Furthermore, during the welding process, the servo motor 3, through the transmission cooperation of the lead screw 14 and the lead block 12, can drive the stepper motor 10, the connecting rod 11, and the workpiece inside the clamping assembly 2 to perform reciprocating linear motion, thereby enabling spot welding of the workpiece again, thus ensuring a more thorough spot welding effect.

[0043] Furthermore, the slide rail 16 can limit the movement of the wire block 12, thereby enabling the wire block 12, the connecting rod 11, the clamping assembly 2, and the workpiece to move smoothly.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-degree-of-freedom workpiece positioning fixture for a spot welding machine, characterized in that, The machine includes a spot welding machine housing (1), a clamping assembly (2), a servo motor (3), and a stepper motor (10). A first welding head (6) and a second welding head (9) are respectively provided at the upper and lower ends of one side of the spot welding machine housing (1). A U-shaped mounting bracket (13) is fixed on one side of the spot welding machine housing (1) between the first welding head (6) and the second welding head (9). A servo motor (3) is provided at one end inside the U-shaped mounting bracket (13). A lead screw (14) is connected to the output end of the servo motor (3). A wire block (12) is sleeved around the lead screw (14). A stepper motor (10) is installed on the top of the wire block (12). A connecting rod (11) is connected to the output end of the stepper motor (10). A clamping assembly (2) is provided between the first welding head (6) and the second welding head (9). The clamping assembly (2) includes a first clamp (201), a second clamp (202) and an ear plate (204). One side of the first clamp (201) is connected to the connecting rod (11), and the second clamp (202) is located on the other side of the first clamp (201). Both ends of the first clamp (201) and the second clamp (202) are fixed with ear plates (204).

2. The multi-degree-of-freedom workpiece positioning fixture for a spot welding machine according to claim 1, characterized in that, The clamping assembly (2) also includes a fastening screw (205) and a nut (206), which are respectively located on the outside of the first clamp (201) and the second clamp (202).

3. The multi-degree-of-freedom workpiece positioning fixture for a spot welding machine according to claim 1, characterized in that, One side of the second clamp (202) is provided with a knob bolt (15) through a bolt hole.

4. The multi-degree-of-freedom workpiece positioning fixture for a spot welding machine according to claim 1, characterized in that, A mounting base (4) is fixed to the upper end of one side of the spot welding machine housing (1). A welding head mounting arm (5) is connected to one side of the mounting base (4). The welding head (6) is installed at the bottom of one end of the welding head mounting arm (5).

5. The multi-degree-of-freedom workpiece positioning fixture for a spot welding machine according to claim 1, characterized in that, The lower end of one side of the spot welding machine housing (1) is fixed with a No. 2 mounting base (7), and a No. 2 welding head mounting arm (8) is connected to one side of the No. 2 mounting base (7). The No. 2 welding head (9) is installed at the bottom of one end of the No. 2 welding head mounting arm (8).

6. The multi-degree-of-freedom workpiece positioning fixture for a spot welding machine according to claim 1, characterized in that, The U-shaped mounting bracket (13) has a slide rail (16) at its inner bottom, and the bottom of the wire block (12) is located inside the slide rail (16).

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