Supporting clamp structure for part gear shaping machining

Abstract

The invention discloses a supporting clamp structure for part gear shaping machining, which comprises a clamp body, a supporting plate arranged on the clamp body, a Haver cushion block arranged on the supporting plate and a pressing piece used for pressing a part on the Haver cushion block, and the clamp body is provided with an accommodating part used for accommodating a radial plate of the part. A center shaft of a part is arranged in the supporting plate and the Harvard cushion block in a penetrating mode, and the Harvard cushion block abuts against the supporting and locating face on the center shaft. A supporting and positioning mode of combining the supporting plate and the Harvard cushion block is adopted, the design diameter of the Harvard cushion block is reduced, the stress torque of the Harvard cushion block is reduced, the problem that the clamp is poor in rigidity is solved, the gear shaping precision is improved, meanwhile, the size of the Harvard cushion block can be customized according to different parts, and the machining cost is reduced. Different parts of the same type can be clamped by the clamp only by manufacturing auxiliary supports of different Haver cushion blocks, the problem that a gear shaping clamp is not high in universality is solved, multiple purposes can be achieved, the number of clamps is reduced, the production cost is reduced, and the application range is wide.

Description

Technical Field

[0001] The present invention relates to a fixture in mechanical processing, and in particular to a supporting fixture structure for part gear shaping processing, which is suitable for fixing and positioning a part of a disc shaft gear when it needs to avoid a large-diameter thin-spoke plate gear for gear shaping (spline) and other processing support. Background Art

[0002] In existing mechanical processing, for disc shaft gears that need to avoid large-diameter thin spokes and small supporting surfaces, the design of the gear-shafting fixture generally adopts a single Havers block support, a large flat pressure plate design, and is tightened with bolts. The distance between the single Havers block support point and the clamping point is long, the force torque is large, and the deformation is large, resulting in poor fixture rigidity and easy sinking force; while the structure of bolt-clamping the pressure plate will cause the clamping force to be unbalanced due to different bolt tightening sequences, and the parts cannot be compacted, causing the parts to loosen during processing, and the quality of gear-shafting is difficult to guarantee (some high-precision gear shafts have spline quality problems during the spline processing, and the spline tooth direction, accumulation and runout are all unqualified, and the spline qualification rate can only reach 60%, seriously affecting product delivery). If a dedicated gear-shafting fixture is used for each part, the processing cost will be greatly increased due to the small scope of application. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a supporting fixture structure for part gear shaping processing, which is beneficial to reducing the force moment, improving the fixture rigidity and gear shaping accuracy.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A support fixture structure for part gear shaping processing includes a clamp body, a support plate arranged on the clamp body, a Haver pad arranged on the support plate, and a pressing member for pressing the part against the Haver pad. The clamp body is provided with a receiving portion for accommodating a spoke plate of the part, the central axis of the part is passed through the support plate and the Haver pad, and the Haver pad abuts against a supporting positioning surface on the central axis.

[0006] As a further improvement of the above technical solution: the clamping member is a clamping nut, the support plate is provided with a convex portion with an external thread, the clamping nut is connected to the convex portion, and the central axis is passed through the clamping nut.

[0007] As a further improvement of the above technical solution: a clamping washer is provided between the clamping nut and the part.

[0008] As a further improvement of the above technical solution: the support plate and the clamp body are fixedly connected by fasteners.

[0009] As a further improvement of the above technical solution: the support plate is provided with a plurality of waist-shaped grooves along the circumferential direction, the fastener is passed through the waist-shaped grooves, the diameter of one end of the waist-shaped groove is smaller than the outer diameter of the fastener, and the diameter of the other end of the waist-shaped groove is larger than the outer diameter of the fastener.

[0010] As a further improvement of the above technical solution: a handle is provided on the support plate.

[0011] As a further improvement of the above technical solution: a positioning groove is provided on the support plate, and the Haver pad is arranged in the positioning groove.

[0012] As a further improvement of the above technical solution: the clamp body is installed on the machine tool through fasteners.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] The present invention discloses a support fixture structure for part gear shaping processing, wherein a support plate is installed on a fixture body, and a Haver pad is installed on the support plate. A supporting and positioning method combining the support plate and the Haver pad is adopted to reduce the design diameter of the Haver pad, reduce the force moment of the Haver pad, solve the problem of poor fixture rigidity, and improve the gear shaping accuracy. Meanwhile, the size of the Haver pad can be customized according to different parts. Different parts of the same type only need to be supported by auxiliary supports of different Haver pads to be suitable for clamping by the fixture, which solves the problem of low versatility of the gear shaping fixture and can achieve multiple uses of one fixture, thereby reducing the number of fixtures, reducing production costs, and having a wide range of applications.

[0015] Furthermore, the supporting fixture structure for part gear shaping processing disclosed in the present invention adopts a clamping method of a clamping nut, which can avoid the problem of unbalanced clamping force and failure to compact parts caused by different clamping sequences and clamping forces implemented during manual operation when a traditional screw clamping structure is clamped. The clamping force of the clamping nut is automatically perpendicular to the clamping end face of the part, and the clamping force is stable and reliable.

[0016] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic cross-sectional view of a supporting fixture structure used for part gear shaping processing according to the present invention.

[0018] Figure 2 It is a schematic diagram of the main structure of the clamp in the present invention.

[0019] Figure 3 It is a schematic diagram of the main structure of the support plate in the present invention.

[0020] Figure 4It is a schematic diagram of the main structure of the Haversian washer in the present invention.

[0021] The symbols in the figure represent:

[0022] 1. Clamping body; 11. Accommodating part; 2. Support plate; 21. Protrusion; 22. Waist-shaped groove; 23. Positioning groove; 3. Haversian pad; 4. Parts; 41. Radial plate; 42. Center axis; 43. Support and positioning surface; 5. Clamping piece; 51. Clamping washer; 6. Fastener. DETAILED DESCRIPTION

[0023] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "assemble", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Figures 1 to 4An embodiment of a support fixture structure for part gear shaping processing of the present invention is shown. The support fixture structure for part gear shaping processing of this embodiment includes a clamp body 1, a support plate 2 arranged on the clamp body 1, a Havers pad 3 arranged on the support plate 2 and a clamping member 5 for pressing the part 4 onto the Havers pad 3. The clamp body 1 is provided with a receiving portion 11 for accommodating a spoke plate 41 of the part 4. The central axis 42 of the part 4 is penetrated by the support plate 2 and the Havers pad 3, and the Havers pad 3 abuts against a supporting positioning surface 43 on the central axis 42.

[0028] The support fixture structure for part gear shaping processing of this embodiment has a support plate 2 installed on a fixture body 1, and a Haver pad 3 installed on the support plate 2. A supporting and positioning method combining the support plate 2 and the Haver pad 3 is adopted to reduce the design diameter of the Haver pad 3, and the force torque of the Haver pad 3 becomes smaller, thereby solving the problem of poor fixture rigidity and being beneficial to improving the gear shaping accuracy. At the same time, the size of the Haver pad 3 can be customized according to the different parts 4. Different parts 4 of the same type only need to make different Haver pads 3 to be suitable for clamping of the fixture, which solves the problem of low versatility of the gear shaping fixture and can achieve multiple uses of one clamp, thereby reducing the number of fixtures, reducing production costs, and having a wide range of applications.

[0029] Furthermore, in this embodiment, the clamping member 5 is a clamping nut, a convex portion 21 with external threads is provided on the support plate 2, the clamping nut is connected to the convex portion 21, and the central axis 42 is passed through the clamping nut.

[0030] The support fixture structure for part gear shaping processing of the present embodiment adopts a clamping method of a clamping nut, which can avoid the problem of unbalanced clamping force and failure to compact part 4 caused by different clamping sequences and clamping forces implemented during manual operation when a traditional screw clamping structure is clamped. The clamping force of the clamping nut is automatically perpendicular to the clamping end face of part 4, and the clamping force is stable and reliable.

[0031] Furthermore, in this embodiment, a compression washer 51 is provided between the compression nut and the part 4. By assembling the compression washer 51 between the compression nut and the part 4, the friction force can be increased and the part 4 can be prevented from being crushed.

[0032] As a preferred embodiment, the support plate 2 is fixedly connected to the clamp body 1 by fasteners 6 (such as bolts, screws, etc.). The fasteners 6 are used to fix the support plate 2 to the clamp body 1, which has good reliability and is convenient for replacing the support plate 2 and the Haval pad 3 thereon.

[0033] Furthermore, in this embodiment, the support plate 2 is provided with three waist-shaped grooves 22 along the circumferential direction, and the fasteners 6 are inserted into the waist-shaped grooves 22. The diameter of one end of the waist-shaped grooves 22 is smaller than the outer diameter of the fasteners 6, and the diameter of the other end of the waist-shaped grooves 22 is larger than the outer diameter of the fasteners 6. When replacing the parts 4, it is not necessary to screw out all the fasteners 6 in the waist-shaped grooves 22. It is only necessary to loosen the fasteners 6 until the support plate 2 can be rotated, and then rotate the support plate 2 so that the fasteners 6 are located at the end with a larger diameter of the waist-shaped grooves 22. At this time, the support plate 2 can be taken out upwards to achieve quick replacement. At the same time, the waist-shaped grooves 22 are also conducive to reducing the weight of the support plate 2 and facilitating the disassembly and assembly of the support plate 2.

[0034] Furthermore, in this embodiment, a handle (not shown in the figure) is provided on the support plate 2. The operator can use the handle to disassemble and assemble the support plate 2, which is more convenient and labor-saving.

[0035] Furthermore, in this embodiment, a positioning groove 23 is provided on the support plate 2, and the Haver pad 3 is arranged in the positioning groove 23, so that the Haver pad 3 can be quickly and accurately positioned on the support plate 2, and the structure is simple and effective.

[0036] As a preferred embodiment, the clamp body 1 is installed on the machine tool through fasteners 6 (such as bolts, screws, etc.), which fixes the entire clamp and has a simple and reliable structure.

[0037] The supporting fixture structure for part gear shaping processing of the present invention solves the problems of low gear shaping precision and high processing cost, and the actual feedback from production shows that the processing qualification rate is increased to 100%. The specific usage method is as follows:

[0038] (1) Manufacture the gear shaping fixture as required and inspect it to be qualified;

[0039] (2) Installation: Install the fixture body 1 on the machine tool, align the fixture support surface to no more than 0.01, and then install the bolts;

[0040] (3) Clamping parts: Install part 4 into the clamp body 1, and support and position it through the support plate 2 and the Haver pad 3, and tighten the clamping nut to fix part 4.

[0041] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A support fixture structure for part gear shaping, characterized in that: The invention comprises a clamp body (1), a support plate (2) arranged on the clamp body (1), a Haver pad (3) arranged on the support plate (2), and a pressing member (5) for pressing a part (4) onto the Haver pad (3); the clamp body (1) is provided with a receiving portion (11) for receiving a spoke plate (41) of the part (4); a central axis (42) of the part (4) is passed through the support plate (2) and the Haver pad (3); and the Haver pad (3) abuts against a supporting positioning surface (43) on the central axis (42).

2. The supporting fixture structure for part gear shaping according to claim 1 is characterized in that: The clamping member (5) is a clamping nut. A convex portion (21) with an external thread is provided on the support plate (2). The clamping nut is connected to the convex portion (21), and the central axis (42) is passed through the clamping nut.

3. The supporting fixture structure for part gear shaping according to claim 2 is characterized in that: A compression washer (51) is provided between the compression nut and the part (4).

4. The support fixture structure for part gear shaping according to any one of claims 1 to 3, characterized in that: The support plate (2) and the clamp body (1) are fixedly connected via a fastener (6).

5. The supporting fixture structure for part gear shaping according to claim 4 is characterized in that: The support plate (2) is provided with a plurality of waist-shaped grooves (22) along the circumferential direction, the fastener (6) is inserted into the waist-shaped grooves (22), the diameter of one end of the waist-shaped groove (22) is smaller than the outer diameter of the fastener (6), and the diameter of the other end of the waist-shaped groove (22) is larger than the outer diameter of the fastener (6).

6. The supporting fixture structure for part gear shaping processing according to claim 4 is characterized in that: The support plate (2) is provided with a handle.

7. The supporting fixture structure for part gear shaping according to any one of claims 1 to 3, characterized in that: The support plate (2) is provided with a positioning groove (23), and the Haversian pad (3) is arranged in the positioning groove (23).

8. The supporting fixture structure for part gear shaping according to any one of claims 1 to 3, characterized in that: The clamp body (1) is mounted on a machine tool via a fastener (6).

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