Error-proof positioning tool for projection welding of a hood lock catch

Abstract

The application discloses a machine cover lock catch projection welding mistake positioning tool, which comprises a workbench, a first supporting frame, a second supporting frame and a clamping assembly, two first supporting frames are vertically and parallelly arranged on the top surface of the workbench, one second supporting frame is vertically and parallelly arranged on the side of the two first supporting frames away from each other, the clamping assembly comprises a supporting block, a rotating connecting rod, a rotating pressing rod and a pressing block, two supporting blocks are arranged on the top edge of the first supporting frame and the top edge of the second supporting frame, one rotating connecting rod is arranged on the opposite ends of the top edge of the first supporting frame and the opposite ends of the top edge of the second supporting frame, one rotating pressing rod is connected to each rotating connecting rod, one end of the rotating pressing rod is connected with the pressing block, and a plurality of pressing blocks are arranged in one-to-one correspondence with a plurality of supporting blocks. The application has the effect of improving the projection welding operation accuracy.

Description

Technical Field

[0001] This application relates to the technical field of projection welding, and in particular to a positioning tool for preventing errors in projection welding of a hood latch. Background Technology

[0002] Projection welding is a special form of resistance welding, belonging to the pressure welding process. Its core principle is to pre-machine protrusions or other raised structures on the workpiece, and during welding, use concentrated current to generate high heat through the protrusions, melting them and forming a weld joint under pressure.

[0003] Currently, conventional pressure welding requires placing the workpiece on a specific workbench and using a welding device to heat the protrusions. The protrusions melt under high heat, and after the protrusions cool down, the two workpieces form a weld point at the protrusions, thus completing the protrusion welding of the workpieces.

[0004] Regarding the aforementioned technologies, the inventors believe that during the projection welding process, the workpiece will undergo slight movement on the worktable, causing misalignment between projections or between workpieces, thereby reducing welding accuracy. Utility Model Content

[0005] To improve the accuracy of pressure welding operations, this application provides a positioning fixture for preventing errors in the projection welding of machine cover latches.

[0006] The technical solution of the anti-misalignment positioning fixture for the hood latch projection welding provided in this application is as follows: A hood latch anti-misalignment positioning fixture includes a worktable, a first support frame, a second support frame, and a clamping assembly. Two first support frames are vertically parallel to each other on the top surface of the worktable. One second support frame is vertically parallel to each of the two first support frames on opposite sides. The clamping assembly includes support blocks, rotating connecting rods, rotating pressure rods, and pressure blocks. Two support blocks are provided on the top edges of both the first and second support frames. One rotating connecting rod is provided at each opposite end of the top edge of both the first and second support frames. One rotating pressure rod is connected to each rotating connecting rod, and one end of the rotating pressure rod is connected to the pressure block. Several pressure blocks are correspondingly arranged with several support blocks. When the rotating pressure rod rotates to a horizontal position, the pressure block corresponds to the position of the corresponding support block.

[0007] By adopting the above technical solution, the workpiece to be processed is placed on several support blocks on the first and second support frames. Rotating the pressure rod to a horizontal position clamps the workpiece between the support blocks and the pressure blocks, achieving stable clamping of the workpiece and reducing the possibility of displacement during pressure welding, thus facilitating subsequent pressure welding processing. Through the cooperation of the worktable, the first support frame, the second support frame, and the clamping components, stable clamping of the workpiece to be processed is achieved, improving the accuracy of the pressure welding operation.

[0008] Optionally, each of the first support bracket and the second support bracket has a mounting block rotatably connected to its opposite sides. The mounting block is equipped with a rotating cylinder, and the output shaft of the rotating cylinder is rotatably connected to the end of the rotating pressure rod away from the pressure block.

[0009] By adopting the above technical solution, the rotary cylinder is started, which drives the rotary pressure rod to rotate on the first support and the second support, thereby achieving stable clamping of the workpiece.

[0010] Optionally, it also includes a positioning component, which includes a first positioning pin, a first abutting ring, a first moving plate, and a first demolding cylinder. The first demolding cylinder is provided on the first support frame. The output shaft of the first demolding cylinder is vertically upward and is connected to the moving plate in a transmission manner. The first positioning pin is vertically disposed on the first moving plate, and the first abutting ring is disposed on the top surface of the first moving plate and sleeved on the first positioning pin.

[0011] By adopting the above technical solution, the workpiece to be processed has a positioning hole corresponding to the first positioning pin. During processing, the first positioning pin is inserted into the corresponding positioning hole, ensuring the accuracy of the workpiece position and facilitating subsequent precise processing of the workpiece. After the welding of the workpiece is completed, the first positioning pin descends under the action of the first demolding cylinder until it separates from the positioning hole of the workpiece, facilitating the subsequent unloading operation of the workpiece.

[0012] Optionally, one of the rotating pressure rods on the first support frame is provided with an extension plate, and a first proximity switch is provided on the extension plate. When the rotating pressure rod is rotated to a horizontal state, the sensing end of the first proximity switch is vertically downward.

[0013] By adopting the above technical solution, when the rotating pressure rod is rotated to a horizontal state, the end of the first proximity switch is set vertically downward to detect whether a workpiece is missing below, thus reducing the possibility of workpiece misplacement or omission.

[0014] Optionally, an extension block is connected to one of the support blocks on the second support frame, and a second proximity switch is provided on the extension block, with the sensing end of the second proximity switch vertically upward.

[0015] By adopting the above technical solution, the second proximity switch detects whether a workpiece is missing from the support block. The first proximity switch and the second proximity switch work together to improve the accuracy of workpiece placement detection.

[0016] Optionally, an abutment pad is provided on one side of the rotating pressure rod. When the rotating pressure rod is rotated to a horizontal state, the abutment pad abuts against the top edge of the corresponding first support or second support.

[0017] By adopting the above technical solution, the abutment pad limits the rotation stroke of the rotating pressure rod, and also avoids the possibility of the rotating pressure rod directly colliding with the top of the first support frame and the second support frame, causing damage.

[0018] Optionally, the first support frame is provided with a support assembly, which includes a support plate and a support sleeve. The support sleeve is vertically disposed on one side of the first support frame, and the support plate is horizontally disposed at the top of the support sleeve. During the pressure welding operation, the top surface of the support plate is flush with the top surface of the first abutment ring, and a clearance groove is provided on one side of the support plate for the first positioning pin to pass through.

[0019] By adopting the above technical solution, when the first positioning pin separates from the workpiece, the support plate supports the workpiece, reducing the possibility of local deformation of the middle position of the workpiece when the first positioning pin moves downward.

[0020] Optionally, the support assembly further includes a slide rod, a first magnet, a second magnet, a top support spring, and a support ring. The support ring is connected to the bottom end of the support sleeve. A rotary motor is mounted on the first support frame, and a rotating plate is driven onto the rotary motor. The second magnet is mounted on the rotating plate, and the second magnet and the output shaft of the rotary motor are vertically intersected. The slide rod is slidably mounted in the support sleeve. The top end of the slide rod is connected to the support plate, and the bottom end of the slide rod is connected to the first magnet. The two ends of the top support spring are respectively connected to the support ring and the first magnet. In its natural state, the support plate is pressed against the top end of the support sleeve under the action of the first magnet and the second magnet, and the top support spring is in a compressed state at this time.

[0021] By adopting the above technical solution, during demolding, the first magnet and the second magnet are vertically aligned, and the support plate contacts and supports the bottom surface of the workpiece. After demolding is completed, the rotary motor drives the rotating plate to rotate, the first magnet and the second magnet cross over and lose their mutual attraction, and the support plate moves upward under the action of the top support spring, lifting the workpiece so that the operator can easily remove it.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. Through the cooperation of the worktable, the first support frame, the second support frame and the clamping components, stable clamping of the workpiece to be processed is achieved, which improves the accuracy of pressure welding operation; 2. The positioning components ensure the accuracy of the workpiece position, which helps to facilitate the precise processing of the workpiece in the future; 3. The support components reduce the possibility of local deformation of the workpiece's middle position when the first locating pin moves downward. Attached Figure Description

[0023] Figure 1 This is a schematic diagram illustrating the structure of a machine cover latch anti-misalignment positioning tooling for an embodiment of the present application.

[0024] Figure 2 yes Figure 1 Enlarged view of part A in the middle.

[0025] Figure 3 This is a structural schematic diagram illustrating the positioning component in the embodiments of this application.

[0026] Figure 4 This is a schematic diagram illustrating the structure of the second proximity switch in an embodiment of this application.

[0027] Figure 5 This is a structural schematic diagram used to illustrate the support component in the embodiments of this application.

[0028] Explanation of reference numerals in the attached drawings: 1. Workbench; 2. First support bracket; 3. Second support bracket; 4. Clamping assembly; 41. Support block; 42. Clamping pad; 43. Rotating cylinder; 44. Mounting block; 45. Rotating connecting rod; 46. Rotating pressure rod; 47. Abutment pad; 48. Pressure block; 49. Clamping pad; 5. Positioning assembly; 51. First positioning pin; 52. First abutment ring; 53. First moving plate; 54. First demolding cylinder; 55. Second... 56. Positioning pin; 57. Second abutment ring; 58. Second moving plate; 59. Second demolding cylinder; 60. Support assembly; 61. Rotary motor; 62. Rotating plate; 63. First magnet; 64. Support sleeve; 65. Support ring; 66. Top support spring; 67. Slide rod; 68. Support plate; 69. Relief groove; 70. Support pad; 81. Extension plate; 92. First proximity switch; 10. Extension block; 11. Second proximity switch; 12. Second magnet. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-5 This application will be further described in detail below. Embodiments of this application provide a positioning fixture for preventing errors during the projection welding of a machine cover latch, which improves the accuracy of the pressure welding operation.

[0030] Reference Figure 1 and Figure 2 A mounting bracket anti-misalignment positioning fixture for a machine cover latch includes a worktable 1, a first support bracket 2, a second support bracket 3, a clamping assembly 4, a positioning assembly 5, and a support assembly 6. Two first support brackets 2 are vertically and parallelly arranged on the top surface of the worktable 1, and two second support brackets 3 are also parallelly arranged on the top surface of the worktable 1. The two second support brackets 3 are located on the side of the two first support brackets 2 that are far apart from each other, and the first support brackets 2 are parallel to the second support brackets 3.

[0031] Reference Figure 1 and Figure 2 The clamping assembly 4 includes a support block 41, a clamping pad 42, a rotating cylinder 43, a mounting block 44, a rotating connecting rod 45, a rotating pressure rod 46, an abutment pad 47, a pressure block 48, and a clamping pad 49. Two support blocks 41 are provided on the top edge of each first support bracket 2 and each second support bracket 3, and one clamping pad 42 is provided on the top tube of each support block 41. One rotating connecting rod 45 is rotatably provided on each opposite side of the top edge of the first support bracket 2 and the second support bracket 3. The middle section of the rotating pressure rod 46 is connected to the end of the rotating connecting rod 45 away from its rotation axis. One end of the rotating pressure rod 46 is connected to the pressure block 48, and the end of the pressure block 48 away from the rotating pressure rod 46 is connected to the clamping pad 49. Several pressure blocks 48 are arranged one-to-one with several support blocks 41. When the rotating pressure rod 46 rotates to a horizontal position, the clamping pad 49 and the clamping pad 42 are vertically aligned.

[0032] Reference Figure 1 and Figure 2 One mounting block 44 is rotatably mounted on the opposite side of each first support 2 and each second support 3. A rotating cylinder 43 is mounted on the mounting block 44, and the output shaft of the rotating cylinder 43 is rotatably connected to the end of the rotating pressure rod 46 away from the pressure block 48. One side of the rotating pressure rod 46 is connected to an abutment pad 47, which is made of elastic material. When the rotating pressure rod 46 rotates to a horizontal position, the abutment pad 47 abuts against the top edge of the corresponding first support 2 or second support 3.

[0033] Reference Figure 2 and Figure 3The positioning assembly 5 includes a first positioning pin 51, a first abutting ring 52, a first moving plate 53, a first demolding cylinder 54, a second positioning pin 55, a second abutting ring 56, a second moving plate 57, and a second demolding cylinder 58. One first demolding cylinder 54 is provided on each of the first support brackets 2. The output shaft of the first demolding cylinder 54 extends vertically upward and is connected to the first moving plate 53. The first positioning pin 51 is vertically disposed on the first moving plate 53, and the first abutting ring 52 is sleeved on the first positioning pin 51 and located on the first moving plate 53. One second demolding cylinder 58 is provided on each of the second support brackets 3. The output shaft of the second demolding cylinder 58 extends obliquely upward and is connected to the second moving plate 57. The second positioning pin 55 is connected to the top surface of the second moving plate 57, and the second abutting ring 56 is sleeved on the second positioning pin 55 and located on the top surface of the second moving plate 57. Positioning holes corresponding to the positions of the first positioning pin 51 and the second positioning pin 55 are provided on the workpiece to be processed.

[0034] Reference Figure 2 and Figure 4 An extension plate 7 is connected to one of the rotating pressure rods 46 on the first support frame 2. A first proximity switch 8 is installed on the extension plate 7. When the rotating pressure rod 46 is rotated to a horizontal position, the detection end of the first proximity switch 8 is vertically downward. An extension block 9 is installed on one of the support blocks 41 on the second support frame 3. A second proximity switch 10 is installed on the extension block 9. The sensing end of the second proximity switch 10 is vertically upward.

[0035] Reference Figure 2 and Figure 5 Each support assembly 6 is provided on each of the first support brackets 2. The support assembly 6 includes a rotary motor 61, a rotating plate 62, a first magnet 63, a support sleeve 64, a support ring 65, a top support spring 66, a sliding rod 67, a support plate 68, and a support pad 69. The support sleeve 64 is vertically mounted on the first support bracket 2, and the support ring 65 is connected to the bottom opening of the support sleeve 64. The sliding rod 67 is slidably mounted in the support sleeve 64, with one end extending out of the support sleeve 64 and connected to the support plate 68. The bottom end of the sliding rod 67 is connected to the first magnet 63, and the bottom end of the first magnet 63 is connected to one end of the top support spring 66. The end of the top support spring 66 away from the first magnet 63 is connected to the top surface of the support ring 65. The support plate 68 is located at the top of the slide rod 67. The top surface of the support plate 68 is connected to the support pad 69. The support plate 68 has a clearance groove 681 through which the first positioning pin 51 passes.

[0036] Reference Figure 2 and Figure 5A rotary motor 61 is mounted on the first support frame 2. The output axis of the rotary motor 61 extends upward and connects to the rotating plate 62. A second magnet 11 is mounted on the rotating plate 62. When the rotating plate 62 rotates to a certain angle, the first magnet 63 and the second magnet 11 are vertically aligned, and the top surface of the rotating plate 62 is flush with the bottom end of the support sleeve. At this time, the first magnet 63 and the second magnet 11 attract each other, the top support spring 66 is compressed, and the top surface of the support plate 68 is flush with the top surface of the first abutment ring 52.

[0037] Reference Figure 1 and Figure 2 When processing and welding the workpiece, the workpiece is placed on several support blocks 41 at the same time, and two first positioning pins 51 and two second positioning pins 55 pass through the corresponding positioning holes on the workpiece. The setting of the positioning component 5 improves the accuracy of workpiece placement and helps to perform precise welding on the workpiece in the future.

[0038] Reference Figure 2 The rotary cylinder 43 is activated, driving the rotary connecting rod 45 and the rotary pressure rod 46 to rotate until the abutment pad 47 abuts against the top edge of the corresponding first support 2 or second support 3. The abutment pad 47 limits the rotation stroke of the rotary pressure rod 46 and also prevents the rotary pressure rod 46 from being damaged by impact during rotation. The clamping pad 42 on the support block 41 and the pressing pad 49 on the pressure block 48 simultaneously clamp the workpiece, achieving stable clamping of the workpiece and further reducing the possibility of it shaking during welding.

[0039] Reference Figure 2 , Figure 4 and Figure 5 The first proximity switch 8 and the second proximity switch 10 simultaneously detect the placement of the workpiece from both sides, reducing the possibility of misplacement or omission. After welding is completed, the output shaft of the first demolding cylinder 54 shortens, causing the first positioning pin 51 to move downwards and separate from the positioning hole of the workpiece. At this time, the support plate 68 supports the bottom surface of the workpiece, reducing the possibility of deformation of its middle part when separating from the first positioning pin 51. After separation from the first positioning pin 51, the rotating cylinder 43 drives the rotating pressure rod 46 to rotate in the opposite direction until it separates from the top surface of the workpiece. At this time, the rotary motor 61 drives the rotating plate 62 to rotate, and the first magnet 63 and the second magnet 11 are crossed in the vertical direction and lose their attraction force. The slide rod 67 moves upward under the action of the top support spring 66 and drives the support plate 68 to move upward. The support plate 68 lifts the workpiece, making it easier for the operator to remove the workpiece.

[0040] The implementation principle of the anti-misalignment positioning fixture for the machine cover latch projection welding in this embodiment is as follows: When processing and welding the workpiece, the workpiece is placed on several support blocks 41 simultaneously, and two first positioning pins 51 and two second positioning pins 55 pass through the corresponding positioning holes on the workpiece. When the rotating cylinder 43 is activated, the clamping pads 42 on the support blocks 41 and the pressing pads 49 on the pressure blocks 48 simultaneously clamp the workpiece, achieving stable clamping of the workpiece.

[0041] After welding is completed, the output shaft of the first demolding cylinder 54 shortens, causing the first locating pin 51 to move downwards and separate from the locating hole of the workpiece. At this time, the support plate 68 supports the bottom surface of the workpiece, reducing the possibility of deformation of its middle part when separating from the first locating pin 51. After separation from the first locating pin 51, the slide rod 67 moves the support plate 68 upwards. The support plate 68 lifts the workpiece, making it easier for the operator to remove it.

[0042] 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 machine cover latch anti-misalignment positioning fixture with projection welding, characterized in that: The assembly includes a workbench (1), a first support frame (2), a second support frame (3), and a clamping assembly (4). Two first support frames (2) are vertically and parallelly arranged on the top surface of the workbench (1). One second support frame (3) is vertically and parallelly arranged on each side of the two first support frames (2) that are far apart from each other. The clamping assembly (4) includes a support block (41), a rotating connecting rod (45), a rotating pressure rod (46), and a pressure block (48). The support block (41) is located on the top edge of the first support frame (2) and the top edge of the second support frame (3). Two of each are provided. The rotating connecting rod (45) is provided at both ends opposite to the top edge of the first support frame (2) and at both ends opposite to the top edge of the second support frame (3). The rotating pressure rod (46) is connected to each of the rotating connecting rods (45). One end of the rotating pressure rod (46) is connected to the pressure block (48). Several pressure blocks (48) are arranged in a one-to-one correspondence with several support blocks (41). When the rotating pressure rod (46) rotates to a horizontal state, the pressure block (48) corresponds to the position of the corresponding support block (41).

2. The anti-misalignment positioning fixture for a machine cover latch according to claim 1, characterized in that: The first support bracket (2) and the second support bracket (3) are rotatably connected to a mounting block (44) on opposite sides. A rotating cylinder (43) is provided on the mounting block (44). The output shaft of the rotating cylinder (43) is rotatably connected to the end of the rotating pressure rod (46) away from the pressure block (48).

3. The anti-misalignment positioning fixture for the machine cover latch according to claim 1, characterized in that: It also includes a positioning component (5), which includes a first positioning pin (51), a first abutting ring (52), a first moving plate (53), and a first demolding cylinder (54). The first support frame (2) is provided with the first demolding cylinder (54). The output shaft of the first demolding cylinder (54) is vertically upward and is connected to the moving plate in a transmission manner. The first positioning pin (51) is vertically disposed on the first moving plate (53). The first abutting ring (52) is disposed on the top surface of the first moving plate (53) and sleeved on the first positioning pin (51).

4. The anti-misalignment positioning fixture for the machine cover latch according to claim 2, characterized in that: An extension plate (7) is provided on one of the rotating pressure rods (46) on the first support frame (2), and a first proximity switch (8) is provided on the extension plate (7). When the rotating pressure rod (46) rotates to a horizontal state, the sensing end of the first proximity switch (8) is vertically downward.

5. The anti-misalignment positioning fixture for the machine cover latch according to claim 4, characterized in that: An extension block (9) is connected to one of the support blocks (41) on the second support frame (3). A second proximity switch (10) is provided on the extension block (9), and the sensing end of the second proximity switch (10) is set vertically upward.

6. The anti-misalignment positioning fixture for the machine cover latch according to claim 2, characterized in that: A contact pad (47) is provided on one side of the rotating pressure rod (46). When the rotating pressure rod (46) rotates to a horizontal state, the contact pad (47) abuts against the top edge of the corresponding first support (2) or second support (3).

7. The anti-misalignment positioning fixture for the machine cover latch according to claim 3, characterized in that: The first support frame (2) is provided with a support assembly (6), which includes a support plate (68) and a support sleeve (64). The support sleeve (64) is vertically disposed on one side of the first support frame (2), and the support plate (68) is horizontally disposed at the top of the support sleeve (64). During the pressure welding operation, the top surface of the support plate (68) is flush with the top surface of the first abutment ring (52). A clearance groove (681) is provided on one side of the support plate (68) for the first positioning pin (51) to pass through.

8. The anti-misalignment positioning fixture for the machine cover latch according to claim 7, characterized in that: The support assembly (6) further includes a slide rod (67), a first magnet (63), a second magnet (11), a top support spring (66), and a support ring (65). The support ring (65) is connected to the bottom end of the support sleeve (64). A rotary motor (61) is mounted on the first support frame (2), and a rotating plate (62) is driven onto the rotary motor (61). The second magnet (11) is mounted on the rotating plate (62), and the second magnet (11) and the output shaft of the rotary motor (61) are staggered in the vertical direction. The slide rod (67) is slidably disposed in the support sleeve (64). The top end of the slide rod (67) is connected to the support plate (68), and the bottom end of the slide rod (67) is connected to the first magnet (63). The two ends of the top support spring (66) are respectively connected to the support ring (65) and the first magnet (63). In the natural state, the support plate (68) is pressed against the top end of the support sleeve (64) under the action of the first magnet (63) and the second magnet (11), and the top support spring (66) is in a compressed state at this time.

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