Clamp for flat grinding of shaft parts

Abstract

The invention provides a shaft part plane grinding clamp which comprises a front support, a rear support and a workpiece clamp which are fixed to a bottom plate, a center sleeve is arranged in the front support, a fixed center is installed in the center sleeve, a sliding sleeve is installed in the rear support, a sliding center is installed in the sliding sleeve, and the workpiece clamp comprises an upper clamping block, a lower clamping block and a clamping assembly between the upper clamping block and the lower clamping block. In the fixed center, the center of the sliding center and the center of the clamping assembly coincide. An axial groove is formed in the lower edge of the sliding center, a notch is formed in one end of the groove, a driving rod is arranged in the sliding sleeve, the driving cylinder is in threaded connection with the sliding center, and an operating handle for driving the driving rod is arranged on the sliding sleeve. When the clamp provided by the invention is used, the lower pressing block and the V-shaped block can be replaced as required, and the clamp can be generally used for grinding regular polygonal shaft parts by changing the shapes of the V-shaped positioning groove and the V-shaped block or changing the sizes of the V-shaped positioning groove and the V-shaped block.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation process equipment, and in particular relates to a fixture for flat grinding of shaft parts. Background Art

[0002] In the field of aviation manufacturing, there are many shaft parts with regular polygon structures, and some of the regular polygon parts need to be ground. However, surface grinders cannot rotate parts without fixtures. Some ordinary fixtures in the prior art cannot firmly clamp and fix such parts, and have poor versatility and cannot be applied to the grinding of regular polygon parts of different specifications. Some of them block the grinding area after clamping and fixing the parts, making the processing operation difficult. Therefore, the existing conventional fixtures cannot clamp regular polygons normally, and it is difficult to complete the grinding process. It is necessary to design a special fixture. Summary of the invention

[0003] In view of this, the present invention aims to overcome the defects in the prior art and proposes a fixture for flat grinding of shaft parts, which has high processing efficiency, reliable quality and versatility.

[0004] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0005] A fixture for flat grinding of shaft parts, comprising a front bracket, a rear bracket and a workpiece fixture fixed to a base plate, the workpiece fixture being located between the front bracket and the rear bracket; a center sleeve is provided in the front bracket, and a fixed center is installed in the center sleeve, a sliding sleeve is installed in the rear bracket, and a sliding center is installed in the sliding sleeve, the workpiece fixture comprises an upper clamping block, a lower clamping block and a clamping assembly therebetween, the center of the fixed center, the center of the sliding center and the center of the clamping assembly coincide with each other; a set screw for limiting the axial movement of the sliding sleeve and an outer anti-rotation pin for limiting the circumferential rotation of the sliding sleeve are provided on the rear bracket, an axial groove is provided at the lower edge of the sliding center, an inner anti-rotation pin cooperating with the groove is provided on the sliding sleeve, and a notch is provided at the end of the groove away from the front bracket, and at the same time, a driving rod is provided in the sliding sleeve, the driving cylinder is threadedly connected to the sliding center, and an operating handle for driving the driving rod is provided at the end of the sliding sleeve away from the front bracket.

[0006] Furthermore, the front bracket and the rear bracket are both detachably mounted on the base plate by screws.

[0007] Furthermore, the lower clamping block is mounted on the wedge-shaped clamping block, and the wedge-shaped clamping block is mounted on the bottom plate.

[0008] Furthermore, the upper clamping block and the lower clamping block are fixed by connecting screws.

[0009] Furthermore, a matching groove is provided at the lower part of the upper pressing block, and a matching part matching with the matching groove is provided at the upper part of the lower pressing block.

[0010] Furthermore, the set screw extends upward and outward from the rear bracket, and a rotating ball head handle is installed on the top end thereof.

[0011] Furthermore, the driving rod adopts a screw rod, in the middle of which a slider matching the inner wall of the sliding sleeve is provided, one end of which is threadedly connected to the sliding top, and the other end is threadedly connected to the side wall of one end of the sliding sleeve.

[0012] Furthermore, the operating handle is installed on one end of the screw rod extending out of the sliding sleeve, and a counterweight handle is arranged on the operating handle.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] The clamp provided by the invention is easy to operate and has high efficiency, and is suitable for small-batch production. In addition, the clamp has strong versatility. When in use, the lower pressing block and the V-block can be replaced as needed. By changing the shapes of the V-shaped positioning groove and the V-block, or the sizes of the V-shaped positioning groove and the V-block, the clamp can be generally used to realize the grinding of regular polygonal shaft parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 A schematic diagram of the structure created by the present invention;

[0017] Figure 2 for Figure 1 Sectional view in the AA direction;

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure created by the present invention. DETAILED DESCRIPTION

[0019] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions 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 cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0021] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0022] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0023] A fixture for flat grinding of shaft parts, such as Figures 1 to 3 As shown, it includes a front bracket 3 fixed to a base plate 1, a rear bracket 9 and a workpiece clamp, and the workpiece clamp is located between the front bracket and the rear bracket; a center sleeve 4 is provided in the front bracket, and a fixed center 2 is installed in the center sleeve, a sliding sleeve 6 is installed in the rear bracket, and a sliding center 5 is installed in the sliding sleeve, and an inner hole is provided at the end of the sliding center away from the fixed center, and an internal thread structure is provided on the side wall of the inner hole.

[0024] The front bracket and the rear bracket are both detachably mounted on the base plate by fixing screws 15, and the front bracket is positioned with the base plate by positioning pins 16 to ensure installation accuracy. As an example, the fixed top is fixed by a Morse taper handle and cannot be moved. The workpiece fixture includes an upper clamping block 11, a lower clamping block 10, and a clamping assembly therebetween, and the center of the fixed top, the center of the sliding top, and the center of the clamping assembly coincide with each other.

[0025] A set screw for limiting the axial movement of the sleeve and an outer anti-rotation pin 23 for limiting the circumferential rotation of the sleeve are provided on the rear bracket, an axial groove is provided on the lower edge of the sliding top, an inner anti-rotation pin 22 cooperating with the groove is provided on the sleeve, and a notch is provided at the end of the groove away from the front bracket. At the same time, a driving rod 7 is provided in the sleeve, the driving cylinder is threadedly connected to the sliding top, and an operating handle 21 for driving the driving rod is provided at the end of the sleeve away from the front bracket.

[0026] The lower clamping block is mounted on the wedge-shaped clamping block 13, and the wedge-shaped clamping block is mounted on the bottom plate. In an optional embodiment, the wedge-shaped clamping block is adjustable in sliding along the direction of the line connecting the two tops on the bottom plate, and is fixed to the bottom plate by magnetic attraction or screws. For example, a slide groove can be set on the bottom plate, and the lower part of the wedge-shaped clamping block slides with the slide groove. In an optional embodiment, a top sleeve flange is provided at one end of the top sleeve facing the sliding rear bracket, and a sleeve flange is provided at one end of the sleeve facing the front bracket.

[0027] The upper clamp block is fixed to the lower clamp block by connecting screws 14. A matching groove is provided at the lower part of the upper pressure block, and a matching portion matching the matching groove is provided at the upper part of the lower pressure block. In an optional embodiment, the clamping assembly includes a V-block 8 installed in the groove at the lower part of the upper clamp block, a clamping screw for clamping the V-block is provided on the upper clamp block, and a V-shaped positioning groove is provided on the lower clamp block corresponding to the V-shaped opening of the V-block for positioning the outer circle of shaft parts. The V-block (on the upper pressure block) and the V-shaped positioning groove (on the lower pressure block) are determined according to the shape of the processed part. The shape of the internal space formed by the V-block and the V-shaped positioning groove is a regular polygon, and the number of sides is consistent with the number of sides of the regular polygon of the part. When processing different parts, it is only necessary to replace the V-block and / or the lower pressure block to adapt to the outer dimensions of the workpiece to achieve grinding processing of parts with different regular polygons and diameters.

[0028] As an example, the upper surface of the wedge-shaped clamping block has an inclination angle of 10° and has a self-locking effect. It is used together with the upper and lower pressing blocks to limit the angular direction of the parts, so as to complete the grinding of the faces of the regular polygons. It should be noted that the present invention can also replace the lower pressing block and the V-shaped block. When the diameter and regular polygon of the parts are different, the V-groove shape of the lower pressing block and the shape of the V-shaped block, or the size of the V-shaped structure of the two, can be changed to achieve the grinding of parts with different diameters and regular polygons. Preferably, the V-shaped block can be made of copper to prevent the outer circle of the part from being crushed and to ensure the quality of the finished product.

[0029] The set screw extends outwardly from the rear bracket, and a rotating ball handle 19 is installed on the top of the set screw. The rotating ball handle can be fixed to the set screw by a fixing pin 18, and the set screw can be conveniently screwed by rotating the ball handle. The drive rod adopts a screw rod, and a slider matching the inner wall of the sleeve is provided in the middle thereof, one end of which is threadedly connected to the sliding top, and the other end is threadedly connected to the side wall of one end of the sleeve. The operating handle is installed on one end of the screw rod extending out of the sleeve, and a counterweight handle 20 is provided on the operating handle. The driving rod can be conveniently screwed by the operating handle, and the position of the sliding top can be changed by changing the screwing length between the driving rod and the sliding top, so that the sliding top can be displaced and adjusted along the axial direction in the sleeve.

[0030] The clamp provided by the invention is easy to operate and has high efficiency, and is suitable for small-batch production. In addition, the clamp has strong versatility. When in use, the lower pressing block and the V-block can be replaced as needed. By changing the shapes of the V-shaped positioning groove and the V-block, or the sizes of the V-shaped positioning groove and the V-block, the clamp can be generally used to realize the grinding of regular polygonal shaft parts.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fixture for flat grinding of shaft parts, characterized by: It includes a front bracket, a rear bracket and a workpiece clamp fixed to a base plate, and the workpiece clamp is located between the front bracket and the rear bracket; a center sleeve is provided in the front bracket, and a fixed center is installed in the center sleeve, a sliding sleeve is installed in the rear bracket, and a sliding center is installed in the sliding sleeve, and the workpiece clamp includes an upper clamping block, a lower clamping block and a clamping assembly therebetween, and the center of the fixed center, the center of the sliding center and the center of the clamping assembly coincide with each other; a locking screw for limiting the axial movement of the sliding sleeve and an outer anti-rotation pin for limiting the circumferential rotation of the sliding sleeve are provided on the rear bracket, an axial groove is provided at the lower edge of the sliding center, an inner anti-rotation pin cooperating with the groove is provided on the sliding sleeve, and a notch is provided at the end of the groove away from the front bracket, and at the same time, a driving rod is provided in the sliding sleeve, the driving cylinder is threadedly connected to the sliding center, and an operating handle for driving the driving rod is provided at the end of the sliding sleeve away from the front bracket.

2. The fixture for flat grinding of shaft parts according to claim 1, characterized in that: The front bracket and the rear bracket are both detachably mounted on the bottom plate by screws.

3. The fixture for flat grinding of shaft parts according to claim 1, characterized in that: The lower clamping block is installed on the wedge-shaped clamping block, and the wedge-shaped clamping block is installed on the bottom plate.

4. The fixture for flat grinding of shaft parts according to claim 1, characterized in that: The upper clamping block and the lower clamping block are fixed by connecting screws.

5. The fixture for flat grinding of shaft parts according to claim 1, characterized in that: A matching groove is provided at the lower part of the upper pressing block, and a matching part matching with the matching groove is provided at the upper part of the lower pressing block.

6. The fixture for flat grinding of shaft parts according to claim 1, characterized in that: The set screw extends upward and outward from the rear bracket, and a rotating ball head handle is installed on the top end thereof.

7. The fixture for flat grinding of shaft parts according to claim 1, characterized in that: The driving rod adopts a screw rod, in the middle of which a sliding block is provided which matches with the inner wall of the sliding sleeve, one end of which is threadedly connected with the sliding top, and the other end of which is threadedly connected with the side wall of one end of the sliding sleeve.

8. The fixture for flat grinding of shaft parts according to claim 7, characterized in that: The operating handle is installed on one end of the screw rod extending out of the sliding sleeve.

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