Hole positioning clamp for automobile parts
By designing a hole positioning fixture, the workpiece is internally clamped using the machined holes. Combined with a telescopic limiting structure and hole clamping, the problem of accuracy and integrity in machining the outer contour of traditional fixtures is solved, achieving efficient clamping and low-cost production.
Patent Information
- Application Number
- CN202423319791.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In the existing technology, traditional fixtures cannot ensure accuracy and integrity when machining the outer contour of a workpiece, especially when the entire outer contour needs to be milled precisely after drilling the workpiece, as there is a lack of effective positioning and clamping methods.
A hole positioning fixture for automotive parts was designed. It utilizes the pre-machined hole structure of the workpiece for internal clamping, and combines a telescopic limiting structure and a hole clamping structure to ensure the correct relative position of the workpiece and the tool, avoiding interference. The clamping effect is achieved through an elastic structure and an arc-shaped locking element.
It improves the accuracy and efficiency of workpiece machining, reduces the scrap rate, simplifies the fixture structure, reduces production and operating costs, ensures the correct position of the workpiece and the tool, and avoids manual positioning errors.
Smart Images
Figure CN223684908U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of fixture, especially a hole positioning fixture of automobile accessories. BACKGROUND
[0002] In the field of precision machining, the machining quality of a workpiece depends largely on the design and application of a fixture. The workpiece has a hole structure drilled in a previous step. Further, the workpiece needs to have an entire outer contour milled accurately. Since the entire outer contour is a region to be machined, traditional external clamping and positioning methods will no longer be applicable. Therefore, in order to ensure the accuracy of the machining process and the integrity of the workpiece, a special fixture must be customized. SUMMARY
[0003] The utility model discloses at least solve one of the prior art technical problems. Therefore, the utility model provides a hole positioning fixture of automobile accessories, and the structure is simple, and clamping effect is good.
[0004] To achieve the above object, the utility model provides the following technical scheme:
[0005] A hole positioning fixture of automobile accessories, comprising: a work platform, a plurality of bosses matched with the shape of a workpiece arranged on the work platform, a hole position clamping structure arranged in the boss, and a telescopic limiting structure arranged on the work platform and abutting against the outer side edge of the boss, the telescopic limiting structure can extend out of the work platform or retract into the work platform; the hole position clamping structure comprises an adjusting piece screwed with the work platform, a plurality of arc-shaped locking pieces arranged around the outer side of the adjusting piece, and an elastic structure arranged on one side of the arc-shaped locking piece; the elastic structure is used for applying an acting force to the arc-shaped locking piece to make the arc-shaped locking piece retract inward; when the adjusting piece is screwed downward, the adjusting piece pushes the arc-shaped locking piece to expand outward.
[0006] According to some embodiments of the utility model, the adjusting piece comprises a tapered portion on the upper portion and abutting against each arc-shaped locking piece, and a threaded rod on the lower portion and screwed with the work platform, the tapered portion has a first groove for rotating the adjusting rod as a whole.
[0007] According to some embodiments of the utility model, the inner side of the arc-shaped locking piece is an arc surface matched with the tapered portion, and the outer side is an arc surface matched with the shape of the hole structure of the workpiece.
[0008] According to some embodiments of the utility model, the work platform is provided with an outer convex ring, one end of the elastic structure abuts against the outer convex ring, and the other end abuts against the arc-shaped locking piece.
[0009] According to some embodiments of the utility model, the arc locking piece includes an arc-shaped protrusion arranged on the bottom and close to one side of the threaded rod, and the arc-shaped protrusion is in abutment with the elastic structure on the outside.
[0010] According to some embodiments of the utility model, the working platform is provided with a first limiting block between the arc locking piece and the threaded rod.
[0011] According to some embodiments of the utility model, the upper part of the boss is a sector block, and the lower part is a circular arc block, the hole clamping structure is arranged in the middle of the circular arc block, and the telescopic limiting structure is arranged at the lower side edge of the sector block.
[0012] According to some embodiments of the utility model, the top surface of the working platform is provided with a receiving hole, the telescopic limiting structure includes a second limiting block arranged in the receiving hole and a telescopic rod arranged vertically, the second limiting block is connected to the upper end of the telescopic rod, the telescopic rod can drive the second limiting block to extend out of the working platform or retract into the working platform, and the second limiting block is in abutment with the outer side edge of the boss after the second limiting block extends out of the working platform.
[0013] According to some embodiments of the utility model, one side of the working platform is provided with a blowing structure.
[0014] According to some embodiments of the utility model, the blowing structure includes a plurality of blowing pipes arranged on one side of the boss.
[0015] The utility model has at least the following beneficial effects:
[0016] The hole clamping structure utilizes the machined hole structure of a workpiece to clamp internally, and does not contact a milling cutter, and the telescopic limiting structure ensures that the relative position of the workpiece and the cutter is correct, the telescopic limiting structure is retracted into the working platform before machining starts, and does not interfere with milling cutter machining, the structure of the clamp is simple, and the clamping effect is good. BRIEF DESCRIPTION OF DRAWINGS
[0017] Fig. 1 It is a structural schematic view of one embodiment of the utility model;
[0018] Fig. 2 It is a partial sectional view of one embodiment of the utility model. DETAILED DESCRIPTION
[0019] This invention provides the following description with reference to the accompanying drawings to aid in a comprehensive understanding of the various embodiments of the invention as defined by the claims and their equivalents. The description includes various specific details to aid understanding, but these details should be considered exemplary only. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the invention.
[0020] In the description of this utility model, 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 utility model 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 limitations on this utility model.
[0021] It should be understood that when one element (e.g., the first element) is “connected” to another element (e.g., the second element), the element may be directly connected to the other element, or there may be an intervening element (e.g., the third element) between the element and the other element.
[0022] An embodiment of this utility model provides a hole positioning fixture for automotive parts, such as... Figs. 1-2 As shown, it includes: a working platform 101, multiple bosses 102 on the working platform 101 that match the shape of the workpiece, a hole clamping structure 201 in the bosses 102, and a telescopic limiting structure 301 on the working platform 101 that abuts against the outer edge of the bosses 102. The telescopic limiting structure 301 can extend out of the working platform 101 or retract into the working platform 101. The hole clamping structure 201 includes an adjusting member 202 screwed to the working platform 101, multiple arc-shaped locking members 203 surrounding the outside of the adjusting member 202, and an elastic structure 204 on one side of the arc-shaped locking members 203. The elastic structure 204 is used to apply a force to the arc-shaped locking members 203 to cause the arc-shaped locking members 203 to retract inward. When the adjusting member 202 is screwed downward, the adjusting member 202 pushes the arc-shaped locking members 203 to expand outward.
[0023] A plurality of bosses 102 are arranged on a work platform 101, the shape of the bosses 102 is consistent with the shape of the processed workpiece, and each boss 102 places a workpiece to be processed. A plurality of bosses can process several workpieces at the same time, which can shorten the processing time of a single piece and improve production efficiency. When the workpiece is processed in a hole structure, it is necessary to be clamped and positioned on at least one side. The telescopic limiting structure 301 is arranged on the side of the workpiece in one process positioning. The telescopic limiting structure 301 can be provided with one or more according to the shape. In the embodiment, only one telescopic limiting structure 301 is needed to cooperate with the hole clamping structure 201 to complete the positioning, avoiding excessive structure, simplifying the clamp, reducing production cost and operation cost, and avoiding the error caused by manual positioning on the boss 102 in the past. The relative position of the workpiece and the tool is correct, the product quality is stable, and the scrap rate is reduced. When placing the workpiece, the hole structure of the workpiece is correspondingly sleeved on the arc-shaped locking piece 203, the workpiece is moved to abut against one side of the telescopic limiting structure 301 for positioning, and at the same time, the arc-shaped locking piece 203 is outwardly ejected and locked by rotating the adjusting piece 202. At the same time, the elastic structure 204 is compressed. Before the processing starts, the telescopic limiting structure 301 is lowered into the work platform 101 and does not interfere with the milling cutter processing.
[0024] In some embodiments, as shown in Figs. 1-2 The adjusting piece 202 includes a tapered portion 205 located at the upper part and abutting against each arc-shaped locking piece 203, and a threaded rod 206 located at the lower part and screwed with the work platform 101. The tapered portion 205 has a first groove 207 for rotating the adjusting rod as a whole. By screwing the tool into the first groove 207, the threaded rod 206 moves up and down on the work platform 101 through the thread, and the tapered portion 205 slides relative to each arc-shaped locking piece 203 on the outside. The tapered surface forms a guide surface, which can make each arc-shaped locking piece 203 relatively close or relatively far away while moving up and down.
[0025] Further, the inner side of the arc-shaped locking piece 203 is an arc surface matched with the tapered portion 205, and the outer side is an arc surface matched with the shape of the workpiece hole structure. Specifically, in the embodiment, the arc-shaped locking piece 203 has four parts, and the arc surfaces of the four arc-shaped locking pieces 203 combine to form a circular shape on the outside. When the inner side is pressed by the tapered portion 205, the four arc-shaped locking pieces 203 split and the outer sides of each are pressed towards one side of the workpiece hole structure, achieving clamping of the workpiece.
[0026] In some embodiments, the work platform 101 is provided with an outer convex ring 208, and the elastic structure 204 abuts against the outer convex ring 208 at one end and abuts against the arc-shaped locking piece 203 at the other end.
[0027] Specifically, the outer convex ring 208 can be multi-segmented or a whole circle, and a space for placing the elastic structure 204 is formed between the outer convex ring 208 and the arc-shaped locking piece 203, and the elastic structure 204 is compressed and released in the space. The outer convex ring 208 of the embodiment is a whole circle arranged at the bottom of the arc-shaped locking piece 203, and has a dustproof effect.
[0028] Further, the arc-shaped locking piece 203 includes an arc-shaped protrusion 209 arranged at the bottom and close to one side of the threaded rod 206, and the outer side of the arc-shaped protrusion 209 abuts against the elastic structure 204. After processing is completed, the adjusting piece 202 is rotated upward, the arc-shaped protrusion 209 of the arc-shaped locking piece 203 is pushed inward by the elastic structure 204 such as a spring or an elastic block, and a gap is formed between the arc-shaped protrusion 209 and the workpiece, facilitating the taking of the workpiece.
[0029] Further, the work platform 101 is provided with a first limiting block 210 between the arc-shaped locking piece 203 and the threaded rod 206. The arc-shaped locking piece 203 is prevented from being excessively pressed by the elastic structure 204 and generating friction with the threaded rod 206.
[0030] In some embodiments, as shown in Figs. 1-2 the upper part of the boss 102 is a fan-shaped block 211, the lower part is a circular arc-shaped block 212, the hole clamping structure 201 is arranged in the middle of the circular arc-shaped block 212, and the telescopic limiting structure 301 is arranged at the lower side edge of the fan-shaped block 211. The fan-shaped block 211 and the circular arc-shaped block 212 are consistent with the shape of the workpiece after processing is completed, the boss 102 protrudes from the work platform 101, and the boss 102 is easier to clean fine chips than opening an avoidance recess. In practice, a work procedure of opening a hole structure on a workpiece is positioned according to the lower side edge of the fan-shaped block, and the telescopic limiting structure 301 arranged at this position can ensure the consistency of positioning.
[0031] In some embodiments, as shown in Fig. 1 the top surface of the work platform 101 is provided with a receiving hole 103, the telescopic limiting structure 301 includes a second limiting block 302 arranged in the receiving hole 103 and a telescopic rod 303 arranged vertically, the second limiting block 302 is connected to the upper end of the telescopic rod 303, and the telescopic rod 303 can drive the second limiting block 302 to extend out of the work platform 101 or retract into the work platform 101; after the second limiting block 302 extends out of the work platform 101, the second limiting block 302 abuts against the outer side edge of the boss 102. The second limiting block 302 is used for positioning the workpiece, the telescopic rod 303 is arranged to facilitate the extension of the second limiting block 302 during positioning, and the second limiting block 302 is retracted into the work platform 101 during processing to prevent collision with a milling cutter.
[0032] In some embodiments, as shown in Fig. 1As shown, the working platform 101 is provided with a blowing structure 401 on one side. Due to the residual cutting chips after machining, the blowing structure 401 can be automatically cleaned, reducing manual operation.
[0033] Further, the blowing structure 401 comprises a plurality of blowing pipes 402 arranged on one side of the boss 102. Compared with large-scale blowing, the blowing pipes 402 arranged on one row of workstations can facilitate accurate blowing cleaning, and also reduce blowing cost.
[0034] The terms and words used in the above description and claims are not limited by the literal meaning, but are merely used by the applicant to enable a clear and consistent understanding of the present application. Therefore, it should be clear to those skilled in the art that the above description of various embodiments of the present application is provided only for illustration, not for limitation of the present application as defined by the appended claims and their equivalents.
Claims
1. A hole positioning jig for an automobile component, characterized by, The utility model relates to a work platform (101), a plurality of convex platforms (102) matched with the workpiece contour are arranged on the work platform (101), a hole position clamping structure (201) is arranged in the convex platform (102), and a telescopic limiting structure (301) abutting with the outside edge of the convex platform (102) is arranged on the work platform (101), the telescopic limiting structure (301) can extend out of the work platform (101) or retract into the work platform (101), the hole position clamping structure (201) includes an adjusting part (202) screwed with the work platform (101), a plurality of arc locking parts (203) are arranged around the outside of the adjusting part (202), and an elastic structure (204) is arranged on one side of the arc locking part (203); the elastic structure (204) is used for exerting an acting force on the arc locking part (203) to make the arc locking part (203) retract inwardly; when the adjusting part (202) is screwed downward, the adjusting part (202) pushes the arc locking part (203) to expand outwardly. The adjusting part (202) includes a tapered part (205) abutting with each arc locking part (203) on the upper part and a threaded rod (206) screwed with the work platform (101) on the lower part, and the tapered part (205) is provided with a first groove (207) for rotating the whole adjusting part (202).
2. A hole positioning fixture for an automotive component according to claim 1, wherein: The inner side of the arc locking part (203) is an arc surface matched with the tapered part (205), and the outer side is an arc surface matched with the shape of the workpiece hole structure.
3. A hole positioning fixture for an automotive component according to claim 2, wherein: The work platform (101) is provided with an outer convex ring (208), one end of the elastic structure (204) abuts with the outer convex ring (208), and the other end abuts with the arc locking part (203).
4. A hole positioning fixture for an automotive component according to claim 2, wherein: The arc locking part (203) includes an arc-shaped protrusion (209) arranged on the bottom near one side of the threaded rod (206), and the outer side of the arc-shaped protrusion (209) abuts with the elastic structure (204).
5. A hole positioning fixture for an automotive component according to claim 4, wherein: The work platform (101) is provided with a first limiting block (210) between the arc locking part (203) and the threaded rod (206).
6. A hole positioning fixture for an automotive component according to claim 4, wherein: The upper part of the convex platform (102) is a sector block (211), and the lower part is a circular arc block (212), the hole position clamping structure (201) is arranged in the middle of the circular arc block (212), and the telescopic limiting structure (301) is arranged at the lower side edge of the sector block (211).
7. A hole positioning fixture for an automotive component according to claim 1, wherein: 8. The hole positioning fixture for an automobile part according to claim 1, characterized by: The top surface of the working platform (101) is provided with a containing hole (103), the telescopic limiting structure (301) comprises a second limiting block (302) arranged in the containing hole (103) and a telescopic rod (303) vertically arranged, the second limiting block (302) is connected with the upper end of the telescopic rod (303), and the telescopic rod (303) can drive the second limiting block (302) to extend out of the working platform (101) or retract into the working platform (101); after the second limiting block (302) extends out of the working platform (101), the second limiting block (302) abuts against the outer edge of the boss (102).
9. The hole positioning fixture for an automobile part according to claim 1, characterized by: One side of the working platform (101) is provided with a blowing structure (401).
10. A hole positioning fixture for an automotive component according to claim 9, wherein: The blowing structure (401) comprises a plurality of blowing pipes (402) arranged on one side of the boss (102).