A type of hood latch spot welding anti-misalignment positioning fixture

Abstract

This application discloses a spot welding anti-misalignment positioning fixture for hood latches, comprising a frame and a positioning assembly. The positioning assembly is disposed on the top surface of the frame, and two support plates are vertically and parallelly arranged on the top surface of the frame. The positioning assembly has one set on each support plate. The positioning assembly includes support rods and positioning pins. Two support rods are vertically arranged on the top edge of each support plate, with the two support rods located at opposite ends of the top edge of the support plate. One positioning pin is disposed on each support plate, and an abutment block is provided on the positioning pin. The top surface of the abutment block is at the same height as the top tip of the support rod. This application improves the processing efficiency of hood latches.

Description

Technical Field

[0001] This application relates to the technical field of hood welding processing, and in particular to a hood latch spot welding anti-misalignment positioning tool. Background Technology

[0002] During the manufacturing process of the hood latches, spot welding is used to weld the workpiece. Spot welding is a welding method that involves directly pressing the workpiece together with upper and lower electrodes, using the resistance heat generated by the current passing through the contact surface to melt the metal and form a weld point. During spot welding, the opposite sides of the part need to be exposed to the machining environment to facilitate welding.

[0003] Regarding the aforementioned technologies, the inventors believe that during the processing of the aforementioned cover latch, the clamping position of the workpiece on the positioning fixture is not fixed each time. Each time, the workpiece and welding device must be re-aligned in order to achieve accurate welding processing of the workpiece. The adjustment process of the workpiece reduces the processing efficiency of the workpiece. In addition, the position adjustment accuracy also depends on the operator's operating experience, which will affect the processing accuracy of the workpiece. Utility Model Content

[0004] To improve the processing efficiency of hood latches, this application provides a spot welding anti-misalignment positioning fixture for hood latches.

[0005] The technical solution of the spot welding anti-misalignment positioning fixture for hood latches provided in this application is as follows:

[0006] A hood latch spot welding anti-misalignment positioning fixture includes a frame and a positioning component. The positioning component is disposed on the top surface of the frame. Two support plates are vertically and parallelly arranged on the top surface of the frame. The positioning component is provided on each of the support plates. The positioning component includes a support rod and a positioning pin. Two support rods are vertically arranged on the top edge of each support plate, and the two support rods are located at opposite ends of the top edge of the support plate. One positioning pin is provided on each support plate. The positioning pin is provided with an abutment block. The top surface of the abutment block is at the same height as the top end of the support rod.

[0007] By adopting the above technical solution, the workpiece is provided with positioning holes corresponding to the positioning pins. During processing, the workpiece is placed on the tops of several support rods simultaneously, and the positioning pins pass through the corresponding positioning holes. The tops of the abutment blocks and the support rods support the workpiece, achieving precise positioning and facilitating subsequent precise processing and welding. Through the cooperation of the frame and positioning components, precise positioning of the workpiece is achieved, which improves the processing efficiency of the cover latch.

[0008] Optionally, the support plate is provided with a stripping cylinder, the output shaft of the stripping cylinder extends vertically upward and is connected to a lifting plate, and the positioning pin is provided on the lifting plate.

[0009] By adopting the above technical solution, the tight connection between the locating pin and the hole in the workpiece may make the unloading process more difficult. During unloading, the output shaft of the unloading cylinder shortens, the bottom surface of the workpiece abuts against the support rod, and the unloading cylinder drives the locating pin to descend and separate from the hole in the workpiece, facilitating the unloading of the workpiece.

[0010] Optionally, the bottom surface of the frame is provided with a number of sliding casters.

[0011] By adopting the above technical solution, the sliding casters facilitate the movement of the machine frame by the operator.

[0012] Optionally, a plurality of lifting cylinders are provided below the frame, the output shaft of the lifting cylinder extends vertically upward and is connected to the frame, a placement frame is provided on the lifting cylinder, a placement plate is horizontally connected to the bottom end of the placement frame, and the bottom surface of the placement plate is flush with the bottom surface of the lifting cylinder.

[0013] By adopting the above technical solution, when the frame is moved to a suitable position, the output shaft of the lifting cylinder extends until the sliding caster separates from the ground and the placement plate abuts against the ground, thus achieving stable support for the frame.

[0014] Optionally, one of the support rods is provided with a proximity switch, the detection end of which is vertically upward and flush with the top of the support rod.

[0015] By adopting the above technical solution, the proximity switch detects the workpiece, reducing the possibility of omissions or misplacements during processing.

[0016] Optionally, the support plate is provided with an anti-fall component, which includes a mounting plate, a driven plate, and an anti-fall plate. The mounting plate is vertically arranged on one side of each of the two support plates, which are far apart from each other. Two driven plates are horizontally slidably arranged on the side of the mounting plate away from the support plates. A second sliding groove is opened along the horizontal direction on the driven plate. Two second waist-shaped blocks are provided on the mounting plate. The two second waist-shaped blocks correspond one-to-one with the two driven plates and are slidably arranged in the corresponding second sliding grooves. The anti-fall plate is arranged on the driven plate and above the support rod.

[0017] By adopting the above technical solution, when placing the workpiece, the two driven plates are pushed in a direction away from each other, causing the anti-fall plate to move away from the support rod. After the workpiece is placed, the two driven plates are pulled in a direction closer to each other, causing the anti-fall plate to reset. When using the stripping cylinder for stripping, at the instant the positioning pin separates from the positioning hole of the workpiece, the workpiece will bounce upward under the force, and the anti-fall plate will limit the workpiece, reducing the possibility of it falling off the support plate.

[0018] Optionally, the anti-fall component further includes a drive plate and a linkage gear. Two drive plates are horizontally slidably arranged on one side of the mounting plate. A first groove is formed on the drive plate along the horizontal direction. Two first waist-shaped blocks are connected to the mounting plate. The two first waist-shaped blocks correspond one-to-one with the two first grooves and slide in cooperation. The two drive plates correspond one-to-one with the two driven plates. A first rack is provided on the side of the drive plate near the driven plate. A second rack is provided on the side of the driven plate near the drive plate. The linkage gear is rotatably connected to the mounting plate and located between the corresponding drive plate and driven plate. The linkage gear meshes with both the first rack and the second rack. A connecting handle is provided on the drive plate.

[0019] By adopting the above technical solution, when driving the fall arrestor, pulling the two connecting handles towards each other or away from each other causes the first rack to drive the linkage gear to rotate, and the linkage gear to drive the second rack to move. This causes the two fall arrestors to move towards each other or away from each other, thus achieving the driving of the fall arrestor.

[0020] Optionally, a return spring is connected between the two drive plates, and in its natural state, the anti-fall plate corresponds to the support rod in the vertical direction under the action of the return spring.

[0021] By adopting the above technical solution, the return spring realizes the automatic reset of the anti-drop plate, reducing the possibility that the anti-drop plate will slide off the support rod during the welding process.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. Through the cooperation of the frame and positioning components, the workpiece is accurately positioned and placed, which improves the processing efficiency of the cover latch;

[0024] 2. Proximity switches detect workpieces, reducing the possibility of omissions or misplacements during processing;

[0025] 3. The anti-fall plate limits the workpiece and reduces the possibility of the workpiece falling off the support plate during the unloading process. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a hood latch spot welding anti-misalignment positioning tool, which is used in Embodiment 1 of this application.

[0027] Figure 2 yes Figure 1 Enlarged view of part A in the middle.

[0028] Figure 3 This is a schematic diagram of the structure of a hood latch spot welding anti-misalignment positioning tool, which is used in Embodiment 2 of this application.

[0029] Figure 4 yes Figure 3 Enlarged view of section B in the middle.

[0030] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Positioning assembly; 21. Proximity switch; 22. Positioning pin; 23. Abutment block; 24. Support rod; 25. Support plate; 26. Lifting plate; 27. Unloading cylinder; 28. First connecting block; 29. ​​Second connecting block; 3. Anti-fall assembly; 31. Mounting plate; 32. Drive plate; 321. First slide groove; 33. First connecting plate; 34. Driven plate; 341. Second slide groove; 35. Second connecting plate; 36. Return spring; 37. Anti-fall plate; 38. Linkage gear; 4. Sliding caster; 5. Lifting cylinder; 6. Placement rack; 7. Placement plate; 8. Base plate; 9. Moving track; 10. First waist-shaped block; 11. First limiting block; 12. Connecting handle; 13. Second waist-shaped block; 14. Second limiting block; 15. Buffer pad; 16. First rack; 17. Second rack. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-4 This application will be further described in detail below. Embodiments of this application provide a spot-welding anti-misalignment positioning fixture for hood latches, which improves the processing efficiency of hood latches.

[0032] Example 1

[0033] Reference Figure 1 and Figure 2 A hood latch spot welding anti-misalignment positioning fixture includes a frame 1 and a positioning component 2. The bottom end of the frame 1 is equipped with several sliding casters 4, and several lifting cylinders 5 are located below the frame 1. The output shafts of the lifting cylinders 5 extend vertically upwards and are connected to the frame 1. A placement frame 6 is connected to the output shaft of the lifting cylinder 5, and a placement plate 7 is horizontally connected to the bottom end of the placement frame 6. The bottom surface of the placement plate 7 is flush with the bottom end of the cylinder body of the lifting cylinder 5. A base plate 8 is located below the placement plate 7, and two parallel moving rails 9 are arranged below the frame 1, with the sliding casters 4 slidably positioned within the moving rails 9.

[0034] Reference Figure 2Two support plates 25 are vertically and parallelly arranged on the top surface of the frame 1. A positioning assembly 2 is provided on each support plate 25. The positioning assembly 2 includes a proximity switch 21, a positioning pin 22, an abutment block 23, a support rod 24, a support plate 25, a lifting plate 26, a stripping cylinder 27, a first connecting block 28, and a second connecting block 29. One support rod 24 is vertically arranged at each end of the top edge of the support plate 25, and the top heights of the support rods 24 are consistent. The stripping cylinder 27 is located on the side of the two support plates 25 that is far apart from each other. The output shaft of the stripping cylinder 27 extends vertically upward and is horizontally connected to the lifting plate 26. The lifting plate 26 is provided with the first connecting block 28, and the first connecting block 28 is connected to the second connecting block 29. The positioning pin 22 is vertically arranged on the second connecting block 29 and located between the corresponding two support rods 24. A stop block 23 is fixedly connected to the positioning pin 22. In the working state, the top surface of the stop block 23 is flush with the top of several support rods 24. A proximity switch 21 is provided on one of the support rods 24. The detection end of the proximity switch 21 is set vertically upward and flush with the top of the support rod 24.

[0035] Reference Figure 1 and Figure 2 The workpiece to be processed has positioning holes corresponding to the two positioning pins 22 (not shown in the attached diagram). During inspection, the workpiece is placed above several support rods 24, and the positioning pins 22 pass through the corresponding positioning holes to achieve rapid and accurate positioning of the workpiece, which helps improve the efficiency and accuracy of subsequent welding operations. After the welding process of the workpiece is completed, because the positioning pins 22 are tightly connected to the positioning holes of the workpiece, the ejector cylinder 27 is activated, which drives the positioning pins 22 to move downward. The support rods 24 support the workpiece, realizing the rapid separation of the positioning pins 22 from the workpiece, which helps to further improve the processing efficiency of the workpiece.

[0036] Reference Figure 1 and Figure 2 The sliding casters 4 facilitate the operator's movement of the frame 1 as needed. Once the frame 1 is moved to a suitable position, the output shaft of the lifting cylinder 5 extends until the sliding casters 4 separate from the ground, and the placement plate 7 is stably supported on the base plate 8, achieving stable support for the frame 1 and reducing the possibility of slippage during processing. The proximity switch 21 detects the workpiece on the support rod 24, reducing the possibility of workpiece omission or misplacement during welding.

[0037] The implementation principle of the anti-misalignment positioning fixture for the spot welding of the hood latch in Embodiment 1 of this application is as follows: During inspection, the workpiece is placed above several support rods 24, and the positioning pin 22 passes through the corresponding positioning hole to achieve rapid and accurate positioning of the workpiece, which helps to improve the efficiency and accuracy of subsequent welding operations. After the welding process of the workpiece is completed, the stripping cylinder 27 is activated to drive the positioning pin 22 to move downward, realizing the rapid separation of the positioning pin 22 from the workpiece.

[0038] Example 2

[0039] Reference Figure 3 and Figure 4 The difference between Embodiment 2 and Embodiment 1 is that Embodiment 2 also includes a fall-prevention component 3, with one set of fall-prevention components 3 provided on each support plate 25. The fall-prevention component 3 includes a mounting plate 31, a drive plate 32, a first connecting plate 33, a driven plate 34, a second connecting plate 35, a return spring 36, a fall-prevention plate 37, and a linkage gear 38. The mounting plate 31 is vertically positioned on the side of the support plate 25 away from the other support plate 25. Two drive plates 32 are horizontally positioned on the side of the mounting plate 31 away from the support plate 25, and a first sliding groove 321 is formed on the drive plate 32 along the horizontal direction. Two first waist-shaped blocks 10 are provided on the mounting plate 31, and the two first waist-shaped blocks 10 correspond one-to-one with the two first sliding grooves 321 and are slidably connected. A first limiting block 11 is provided on the side of the first waist-shaped block 10 away from the mounting plate 31, and the first limiting block 11 is fitted against the side of the drive plate 32 away from the mounting plate 31. One first connecting plate 33 is vertically connected to the bottom edge of each drive plate 32, and a connecting handle 12 is provided on the side of the first connecting plate 33 away from the mounting plate 31. A return spring 36 is connected between the two drive plates 32.

[0040] Reference Figure 4 Two driven plates 34 are horizontally arranged on the side of the mounting plate 31 away from the support plate 25, and two sliding grooves are formed on the driven plates 34 along the horizontal direction. Two second waist-shaped blocks 13 are provided on the mounting plate 31, and the two second waist-shaped blocks 13 correspond one-to-one with the two second sliding grooves 341 and are slidably connected. A second limiting block 14 is provided on the side of the second waist-shaped block 13 away from the mounting plate 31, and the second limiting block 14 is fitted to the side of the driven plate 34 away from the mounting plate 31. A second connecting plate 35 is vertically connected to the top edge of each drive plate 32, and a fall arrestor 37 is horizontally connected to the top of the second connecting plate 35. A buffer pad 15 is connected to the bottom surface of the fall arrestor 37. In the natural state, the fall arrestor 37 corresponds one-to-one with the support rod 24 under the action of the return spring 36, and the fall arrestor 37 is set above the corresponding support rod 24.

[0041] Reference Figure 4Two drive plates 32 and two driven plates 34 are arranged in a one-to-one correspondence. A linkage gear 38 is rotatably mounted on the mounting plate 31 and is positioned between the corresponding drive plate 32 and driven plate 34. A first rack 16 is provided on the top edge of the drive plate 32, and a second rack 17 is provided on the bottom edge of the driven plate 34. The linkage gear 38 meshes with both the first rack 16 and the second rack 17.

[0042] Reference Figure 3 and Figure 4 During welding, the anti-fall plate 37 is positioned above the workpiece. When the workpiece is removed after welding, the locating pin 22 is tightly connected to the locating hole of the workpiece, causing the workpiece to bounce upwards under force the instant it separates from the locating pin 22. The anti-fall plate 37 limits the workpiece, reducing the possibility of it falling directly from the support plate 25. When it is necessary to remove the workpiece, the two connecting handles 12 are pulled towards each other, compressing the return spring 36 and accumulating elastic potential energy. The first rack 16 drives the linkage gear 38 to rotate, and the linkage gear 38 drives the second rack 17 to move, thus driving the anti-fall plate 37. The anti-fall plate 37 moves away from the support rod 24, releasing the limitation on the workpiece. The return spring 36 enables the automatic reset of the two drive plates 32, reducing the possibility of the anti-fall plate 37 moving away from the support rod 24 during welding.

[0043] The implementation principle of the anti-misalignment positioning fixture for spot welding of the hood latch in Embodiment 2 of this application is as follows: During welding, the anti-fall plate 37 is positioned above the workpiece. During unloading, the workpiece will bounce upward under force the instant it separates from the positioning pin 22. The anti-fall plate 37 limits the workpiece, reducing the possibility of the workpiece falling directly from the support plate 25. When it is necessary to remove the workpiece, the two connecting handles 12 are pulled towards each other, and the anti-fall plate 37 is removed from the support rod 24, releasing the limitation on the workpiece.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A spot-welded anti-misalignment positioning fixture for a machine cover latch, characterized in that: The device includes a frame (1) and a positioning component (2). The positioning component (2) is disposed on the top surface of the frame (1). Two support plates (25) are vertically and parallelly disposed on the top surface of the frame (1). The positioning component (2) is disposed on each of the support plates (25). The positioning component (2) includes a support rod (24) and a positioning pin (22). Two support rods (24) are vertically disposed on the top edge of each support plate (25). The two support rods (24) are located at opposite ends of the top edge of the support plate (25). One positioning pin (22) is disposed on each support plate (25). An abutment block (23) is disposed on the positioning pin (22). The top surface of the abutment block (23) is at the same height as the top end of the support rod (24).

2. The anti-misalignment positioning fixture for the hood latch spot welding according to claim 1, characterized in that: The support plate (25) is provided with a stripping cylinder (27), the output shaft of the stripping cylinder (27) extends vertically upward and is connected to a lifting plate (26), and the positioning pin (22) is provided on the lifting plate (26).

3. The anti-misalignment positioning fixture for the hood latch spot welding according to claim 1, characterized in that: The bottom surface of the frame (1) is provided with several sliding casters (4).

4. The anti-misalignment positioning fixture for the hood latch spot welding according to claim 3, characterized in that: Several lifting cylinders (5) are provided below the frame (1). The output shaft of the lifting cylinder (5) extends vertically upward and is connected to the frame (1). A placement rack (6) is provided on the lifting cylinder (5). A placement plate (7) is horizontally connected to the bottom end of the placement rack (6). The bottom surface of the placement plate (7) is flush with the bottom surface of the lifting cylinder (5).

5. The anti-misalignment positioning fixture for the hood latch spot welding according to claim 1, characterized in that: One of the support rods (24) is provided with a proximity switch (21), the detection end of the proximity switch (21) is set vertically upward and flush with the top of the support rod (24).

6. The anti-misalignment positioning fixture for the hood latch spot welding according to claim 2, characterized in that: The support plate (25) is provided with a fall prevention component (3). The fall prevention component (3) includes a mounting plate (31), a driven plate (34), and a fall prevention plate (37). The mounting plate (31) is vertically arranged on one side of each of the two support plates (25) away from each other. The driven plate (34) is horizontally slidably arranged on the side of the mounting plate (31) away from the support plate (25). The driven plate (34) is provided with a second sliding groove (341) along the horizontal direction. The mounting plate (31) is provided with two second waist-shaped blocks (13). The two second waist-shaped blocks (13) correspond one-to-one with the two driven plates (34) and are slidably arranged in the corresponding second sliding groove (341). The fall prevention plate (37) is arranged on the driven plate (34) and above the support rod (24).

7. The anti-misalignment positioning fixture for the hood latch spot welding according to claim 6, characterized in that: The anti-fall component (3) further includes a drive plate (32) and a linkage gear (38). Two drive plates (32) are horizontally slidably arranged on one side of the mounting plate (31). A first groove (321) is formed on the drive plate (32) along the horizontal direction. Two first waist-shaped blocks (10) are connected to the mounting plate (31). The two first waist-shaped blocks (10) correspond one-to-one with the two first grooves (321) and slide in cooperation. The two drive plates (32) correspond one-to-one with the two driven plates (34). The drive plate (32) has a first rack (16) on its side near the driven plate (34), and the driven plate (34) has a second rack (17) on its side near the drive plate (32). The linkage gear (38) is rotatably connected to the mounting plate (31) and located between the corresponding drive plate (32) and driven plate (34). The linkage gear (38) meshes with both the first rack (16) and the second rack (17). The drive plate (32) has a connecting handle (12).

8. The anti-misalignment positioning fixture for the hood latch spot welding according to claim 7, characterized in that: A return spring (36) is connected between the two drive plates (32). In its natural state, the anti-fall plate (37) corresponds to the support rod (24) in the vertical direction under the action of the return spring (36).

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