Automobile sheet metal clinch fixture

Abstract

The present application relates to the field of automobile plate processing, and discloses a vehicle plate butt welding clamp, comprising: a base; a butt welding assembly, the butt welding assembly comprises a lower butt welding head arranged on the base, a swing driver arranged on the base, and an upper butt welding head driven by the swing driver to swing up and down; a positioning assembly, the positioning assembly comprises a positioning pin arranged on the base; and a chip blocking assembly, the chip blocking assembly comprises a linear driver arranged on the base and a chip blocking block driven by the linear driver to move to the side of the positioning pin. The vehicle plate butt welding clamp is provided with the chip blocking assembly, the chip blocking block is extended into the welding seam and the positioning pin before the butt welding assembly works, so that when the vehicle plate is butt welded, the welding chips are not easy to splash onto the positioning pin, and the workpiece is not easy to be hindered when it is separated from the positioning pin.

Description

Technical Field

[0001] This invention relates to the field of automotive sheet metal processing, and particularly to a welding fixture for automotive sheet metal. Background Technology

[0002] The car's frame is primarily made of metal. For example, the car's underframe requires spacers, and the bottom needs reinforcing bosses for jack support. For these spacers or bosses that don't require sealing, welding is one of the most convenient connection methods. The most efficient welding method is spot welding. When spot welding parts, the two parts need to be positioned using pins. However, due to sparks and other issues, weld spatter adheres to the pins, preventing the welded parts from easily removing from the pins. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0004] This invention provides a spot welding fixture for automotive sheet metal, comprising:

[0005] Base;

[0006] A spot welding assembly, comprising a lower spot welding head disposed on the base, a swing driver disposed on the base, and an upper spot welding head that swings up and down driven by the swing driver;

[0007] A positioning component, the positioning component including a positioning pin disposed on the base;

[0008] A chip-blocking assembly, comprising a linear actuator disposed on the base and a chip-blocking block driven by the linear actuator to move to the side of the positioning pin.

[0009] The beneficial effects of the present invention are as follows: By configuring a chip-blocking component, the chip-blocking block extends into the weld and the positioning pin before the welding component is working, so that when welding automotive sheet metal is being spot-welded, the welding chips are less likely to splash onto the positioning pin, and the workpiece is less likely to be obstructed when it is removed from the positioning pin.

[0010] As a sub-solution of the above technical solution, the chip blocking assembly further includes a magnetic absorbing piece, which is connected to the chip blocking block and is located on the side of the chip blocking block facing away from the positioning pin.

[0011] As some sub-solutions of the above technical solution, the chip block is hollow, and the chip block has a cavity for containing coolant, and the magnetic suction plate is disposed in the cavity.

[0012] As a sub-solution of the above technical solution, a partition is also provided inside the cavity, which isolates the magnetic sheet on one side of the cavity.

[0013] As some sub-solutions of the above technical solution, the wall surface of the chip block facing away from the positioning pin is used as the chip blocking wall, and the chip blocking wall is provided with a thin-walled portion.

[0014] As some sub-solutions of the above technical solution, the thickness of the thin-walled portion is 0.4 to 0.8 times the thickness of the chip-blocking block.

[0015] As a sub-solution of the above technical solution, the chip-blocking wall is inclined along the vertical direction, with the upper end tilting towards the positioning pin.

[0016] As some sub-solutions of the above technical solution, the chip blocking assembly further includes a chip scraper plate, which is disposed on the base. The shape of the chip scraper plate is adapted to the shape of the chip blocking block, and the chip scraper plate is used to scrape off the welding chips attached to the surface of the chip scraper plate.

[0017] As a sub-solution of the above technical solution, the chip blocking assembly further includes a collection box, which is located below the chip scraper.

[0018] As some sub-solutions of the above technical solution, the chip blocking assembly further includes a connecting plate, which is connected to the output end of the linear drive. There are two chip blocking blocks, both of which are connected to the connecting plate. The two chip blocking blocks are spaced apart on the side of the connecting plate facing away from the linear drive, and a clearance groove is formed between the two conveyor belt chip blocking blocks to avoid the positioning pin. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 Schematic diagram of an embodiment of a butt welding fixture for automotive sheet metal Figure 1 ;

[0021] Figure 2 Schematic diagram of an embodiment of a butt welding fixture for automotive sheet metal Figure 2 ;

[0022] Figure 3 This is a schematic diagram of the chip-blocking block.

[0023] Figure 4 This is a cross-sectional view of the chip-blocking block;

[0024] Figure 5 This is a schematic diagram of the structure of a flat plate and a U-shaped plate.

[0025] In the attached diagram: 1-base; 21-lower welding head; 22-oscillating actuator; 23-upper welding head; 31-positioning pin; 41-linear actuator; 42-chip block; 421-chip wall; 4211-thin-walled section; 422-partition; 43-magnetic plate;

[0026] 101-U-shaped plate; 102-flat plate. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0029] In the description of this invention, "several" means an indefinite quantity, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features. The use of "and / or" throughout the text indicates three parallel solutions; for example, A and / or B indicates a solution satisfied by A, a solution satisfied by B, or a solution satisfied by both A and B.

[0030] In the description of this invention, if there is a short phrase containing multiple parallel features, the modifier in the phrase defines the closest feature. For example, "B, C, and E connected to D are set on A" means that B is set on A, E is connected to D, and C is not defined. However, modifiers indicating the relationship between features, such as "interval setting" or "circular arrangement," do not fall into this category. Modifiers preceded by "all" define all features in the short phrase. For example, "B, C, and D are all set on A" means that B, C, and D are all set on A. In statements where the subject is omitted, the omitted subject is the subject of the preceding statement; that is, "A has B and includes C" means that A has B and A includes C.

[0031] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0032] The following is combined Figures 1 to 5 Embodiments of the present invention will be described.

[0033] This embodiment relates to a welding fixture for automotive sheet metal, used for welding U-shaped plate 101 and flat plate 102, both of which are martensitic steel. Figure 5 As shown.

[0034] The automotive sheet metal spot welding fixture of this embodiment includes: a base 1, a spot welding assembly, a positioning assembly, and a chip blocking assembly; the spot welding assembly includes a lower spot welding head 21 disposed on the base 1, a swing driver 22 disposed on the base 1, and an upper spot welding head 23 that swings up and down driven by the swing driver 22; the positioning assembly includes a positioning pin 31 disposed on the base 1; the chip blocking assembly includes a linear driver 41 disposed on the base 1 and a chip blocking block 42 that moves to the side of the positioning pin 31 driven by the linear driver 41.

[0035] In use, first, both the flat plate 102 and the "U"-shaped plate are fitted onto the positioning pin 31. The linear driver 41 of the chip-blocking assembly drives the chip-blocking block 42 to extend between the positioning pin 31 and the weld. Then, the oscillating driver 22 is activated to drive the upper welding head 23 to swing downward, so that the flat plate 102 and the "U"-shaped plate are pressed together by the upper welding head 23 and the lower welding head 21. Then, power is supplied to the upper welding head 23 and the lower welding head 21 to weld the flat plate 102 and the "U"-shaped plate together.

[0036] The automotive sheet metal spot welding fixture is equipped with a chip-blocking component. Before the spot welding component is working, the chip-blocking block 42 extends into the weld seam and the positioning pin 31 to block the weld seam. Therefore, when spot welding automotive sheet metal, the welding chips are not easy to splash onto the positioning pin 31, and the workpiece is not easily obstructed when it comes out of the positioning pin 31.

[0037] The chip-blocking assembly also includes a magnetic suction plate 43, which is connected to the chip-blocking block 42 and located on the side of the chip-blocking block 42 facing away from the positioning pin 31. The magnetic suction plate 43, in addition to blocking welding chips that splatter during welding at the positioning pin 31, also helps to attract welding chips to the surface of the chip-blocking block 42, reducing the chance of welding chips falling into the workpiece and scattering and polluting the environment during workpiece transportation.

[0038] During welding, the temperature of the molten pool can reach over 1000℃. The temperature of the weld spatter generated by air cooling can be reduced to a certain extent, allowing the weld chips to regain a certain degree of paramagnetism or ferromagnetism, thus being attracted by the magnetic attractor 43. To accelerate the cooling rate of the welding process, the chip-blocking block 42 is hollow, with a cavity inside for containing coolant, and the magnetic attractor 43 is located within the cavity. In this embodiment, the chip-blocking block 42 also has an inlet and an outlet that communicate with the cavity, located at the top and bottom of the chip-blocking block 42, respectively, and both are covered. Before using the chip-blocking block 42, supercooled water is injected into the cavity through the inlet, which can lower the air temperature near the welding position, allowing the weld chips to cool more quickly when they fly out, thus lowering their temperature and making them easier for the magnetic attractor 43 to attract. When it is necessary to replace the supercooled water, it can be conveniently discharged through the outlet.

[0039] A partition 422 is also provided inside the cavity, which isolates the magnetic absorbing sheet 43 on one side of the cavity. By configuring this partition 422, the influence of liquid on the magnetic absorbing sheet 43 can be isolated, thereby ensuring the stability of the magnetic absorbing sheet 43.

[0040] The wall surface of the chip-blocking block 42 facing away from the positioning pin 31 is designated as the chip-blocking wall 421, and a thin-walled portion 4211 is provided on the chip-blocking wall 421. In this embodiment, the chip-blocking block 42 is made of a paramagnetic material, allowing the magnetic absorbing sheet 43 located in the inner cavity of the chip-blocking block 42 to adsorb welding chips through the side wall of the chip-blocking block 42. The thin-walled portion 4211 on the chip-blocking wall 421 enhances the adsorption capacity of the magnetic absorbing sheet 43 for welding chips. Furthermore, when welding chips splash onto the outer wall of the chip-blocking block 42, it also improves the efficiency of the supercooling water and welding, making it easier for the supercooling water to lower the temperature of the welding chips, and making it easier for the welding chips to be adsorbed by the magnetic absorbing sheet 43. Specifically, the thickness of the thin-walled portion 4211 is 0.4 to 0.8 times the thickness of the chip-blocking block 42. A thickness of 0.4 times is more conducive to improving heat exchange efficiency, while a thickness of 0.8 times helps to ensure the structural strength of the chip-blocking block 42. In this embodiment, the chip baffle 42 has a thickness of 3 mm, resulting in a thin-walled portion 4211 with a thickness of 1.2 mm to 2.4 mm. Specifically, using 1.2 mm simultaneously improves heat exchange efficiency and meets strength requirements.

[0041] Furthermore, the vertical chip-blocking wall 421 is inclined, with its upper end tilting towards the positioning pin 31. This inclined arrangement of the chip-blocking wall 421 allows weld spatter to roll off when it hits it, resulting in more thorough cooling of the weld spatter and further increasing the likelihood of the weld spatter being attracted by the magnetic plate 43.

[0042] The chip-blocking assembly also includes a chip scraper (not shown in the figure), which is mounted on the base 1. The shape of the chip scraper is adapted to the shape of the chip-blocking block 42. The chip scraper is used to scrape off welding chips adhering to its surface. The chip scraper is positioned on the moving part of the chip-blocking block 42. After welding is completed, when the linear actuator 41 drives the chip-blocking block 42 to retract, the chip scraper abuts against the chip-blocking wall 421 of the chip-blocking block 42, thereby scraping off the welding chips adhering to its surface and ensuring the cleanliness of the chip-blocking block 42.

[0043] The chip-blocking assembly also includes a collection box (not shown in the figure), which is located below the chip scraper. By configuring this collection box, welding chips scraped from the chip-blocking block 42 by the chip scraper can be efficiently stored in the collection box.

[0044] The chip-blocking assembly also includes a connecting plate connected to the output end of the linear drive 41. Two chip-blocking blocks 42 are included, each connected to the connecting plate and spaced apart on the side of the connecting plate facing away from the linear drive 41. A clearance groove is formed between the two chip-blocking blocks 42 to avoid the positioning pin 31. By configuring the connecting plate and the two chip-blocking blocks 42, the chip-blocking assembly can effectively block chips from both sides of the positioning pin 31, better preventing the workpiece from being difficult to remove from the positioning pin 31 due to weld slag adhesion.

[0045] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of the present invention.

Claims

1. A spot welding fixture for automotive sheet metal, characterized in that: include: Base; A spot welding assembly, comprising a lower spot welding head disposed on the base, a swing driver disposed on the base, and an upper spot welding head that swings up and down driven by the swing driver; A positioning component, the positioning component including a positioning pin disposed on the base; A chip-blocking assembly includes a linear actuator mounted on the base, a chip-blocking block moved by the linear actuator to the side of the positioning pin, and a magnetic suction plate connected to the chip-blocking block. The magnetic suction plate is located on the side of the chip-blocking block facing away from the positioning pin. The chip-blocking block is hollow and has a cavity for containing coolant. The magnetic suction plate is disposed within the cavity, with the wall of the chip-blocking block facing away from the positioning pin serving as the chip-blocking wall. The chip-blocking wall has a thin-walled portion. The chip-blocking assembly also includes a chip scraper mounted on the base, the shape of which is similar to that of the chip-blocking block. The chip blocking blocks are shaped to match each other. The chip scraper is used to scrape off the welding chips attached to the surface of the chip scraper. The chip blocking assembly also includes a connecting plate, which is connected to the output end of the linear drive. There are two chip blocking blocks, both of which are connected to the connecting plate. The two chip blocking blocks are spaced apart on the side of the connecting plate facing away from the linear drive. A clearance groove is formed between the two conveyor belt chip blocking blocks to avoid the positioning pin. An inlet and an outlet communicating with the cavity are provided on the chip blocking blocks. The inlet and outlet are located at the top and bottom of the chip blocking blocks, respectively. Both the inlet and outlet are provided with caps.

2. The automotive sheet metal welding fixture according to claim 1, characterized in that: The thickness of the thin-walled portion is 0.4 to 0.8 times the thickness of the chip-blocking block.

3. The automotive sheet metal welding fixture according to claim 1, characterized in that: The chip-blocking wall is inclined along the vertical direction, with its upper end tilting towards the positioning pin.

4. The automotive sheet metal welding fixture according to claim 1, characterized in that: The chip-blocking assembly also includes a collection box located below the chip scraper.

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