Camshaft arc machining fixing tool

Abstract

The utility model relates to the technical field of workpiece machining, in particular to a camshaft arc machining fixing tool which comprises a fixing base plate, a fixing support is installed on the fixing base plate, the fixing support extends in the horizontal direction to form an upper fixing platform and a lower fixing platform, an upper positioning hole is formed in the upper fixing platform, and a lower positioning hole is formed in the lower fixing platform. A bottom positioning hole is formed in the fixed chassis, the upper positioning hole, the lower positioning hole and the bottom positioning hole are vertically aligned, a fastening bolt is arranged on the upper fixed platform, and an anti-rotation pin shaft is arranged on the lower fixed platform; a to-be-machined cam shaft is sequentially placed into the upper positioning hole, the lower positioning hole and the bottom positioning hole, the cam shaft is rotated to enable a shaft hole of the cam shaft to be aligned with the through hole, the anti-rotation pin shaft is inserted, the fastening bolt is tightened, the anti-rotation pin shaft prevents axial rotation of the cam shaft in the machining process, and in addition, the fastening bolt further abuts against the cam shaft. The cam shaft is fixed from multiple layers, operation is very convenient, the machining precision is guaranteed, and the machining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece processing, in particular to a fixing tool for camshaft arc machining. Background Technique

[0002] The camshaft processing tool is a special tooling equipment for processing camshafts. The camshaft is a key component in the engine, used to control the opening and closing timing of the valves. In order to ensure the accuracy and quality of the camshaft, special tooling is required for processing. The camshaft processing tool usually includes fixtures, positioning blocks, measuring tools, etc. The fixture is used to fix and clamp the camshaft to keep the position of the camshaft stable during processing. However, most of the existing fixtures only rely on the clamping plate to fix the camshaft. During the processing of the camshaft, the camshaft is prone to rotation, resulting in poor fixing effect and affecting the processing accuracy. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a fixing tool for camshaft arc machining that can prevent the camshaft from rotating during processing, has a good fixing effect, and is convenient for disassembly and assembly.

[0004] To solve the above technical problem, the technical solution of the utility model is: a fixing tool for camshaft arc machining, including a fixed chassis, a fixed bracket is installed on the fixed chassis, the fixed bracket extends horizontally with an upper fixed platform and a lower fixed platform, an upper positioning hole is opened on the upper fixed platform, a lower positioning hole is opened on the lower fixed platform, a bottom positioning hole is opened on the fixed chassis, the upper positioning hole, the lower positioning hole and the bottom positioning hole are arranged vertically aligned, a fastening bolt is provided on the upper fixed platform, and an anti-rotation pin shaft is provided on the lower fixed platform.

[0005] As a preferred technical solution, the fixed chassis is a disc, the bottom positioning hole is a circular hole, and the diameter of the bottom positioning hole is equal to the outer diameter of the shaft rod of the camshaft.

[0006] As a preferred technical solution, the upper fixed platform is a rectangular plate-like structure, the upper positioning hole is a circular hole, and the diameter of the upper positioning hole is equal to the outer diameter of the shaft rod of the camshaft.

[0007] As a preferred technical solution, the lower fixed platform is a rectangular plate-like structure, the lower positioning hole is a circular hole, the diameter of the lower positioning hole is equal to the diameter of the upper positioning hole, and the upper positioning hole, the lower positioning hole and the bottom positioning hole are coaxially arranged.

[0008] As a preferred technical solution, the upper positioning hole and the lower positioning hole are polygonal holes, and the axis of the inscribed circle of the polygonal hole is coaxial with the bottom positioning hole.

[0009] As a preferred technical solution, threaded holes are provided on the side of the upper fixed platform, the threaded holes extend into the upper positioning holes, and fastening bolts are threadedly installed in the threaded holes.

[0010] As a preferred technical solution, through holes are provided on the side of the lower fixed platform, the through holes penetrate the lower positioning holes, and anti-rotation pin shafts are detachably installed in the through holes.

[0011] Due to the adoption of the above technical solution, the camshaft arc machining fixing tooling includes a fixed chassis, a fixed bracket is installed on the fixed chassis, the fixed bracket extends horizontally with an upper fixed platform and a lower fixed platform, an upper positioning hole is provided on the upper fixed platform, a lower positioning hole is provided on the lower fixed platform, a bottom positioning hole is provided on the fixed chassis, the upper positioning hole, the lower positioning hole and the bottom positioning hole are arranged vertically in alignment, a fastening bolt is provided on the upper fixed platform, and an anti-rotation pin shaft is provided on the lower fixed platform; the beneficial effect of the present invention is: the camshaft to be machined is sequentially placed into the upper positioning hole, the lower positioning hole and the bottom positioning hole, then the camshaft is rotated to align its shaft hole with the through hole, the anti-rotation pin shaft is inserted, and then the fastening bolt is tightened to machine one side of the cam arc surface. After machining one side of the camshaft, the camshaft is taken out and axially rotated 180 degrees, the anti-rotation pin shaft is inserted again, the fastening bolt is tightened, and the other side of the cam arc surface is machined. Since the camshaft is fixed by the anti-rotation pin shaft, axial rotation of the camshaft during machining is prevented. Since the camshaft is positioned vertically by the upper positioning hole, the lower positioning hole and the bottom positioning hole, shaking of the camshaft is avoided. In addition, the fastening bolt further abuts against the camshaft, fixing the camshaft from multiple levels, and the operation is very convenient, which not only ensures the machining accuracy but also improves the machining efficiency. Description of the Drawings

[0012] The following drawings are only intended to illustrate and explain the present invention schematically and do not limit the scope of the present invention. Among them:

[0013] Figure 1 is a schematic structural view of the camshaft arc machining fixing tooling of the present invention;

[0014] Figure 2 is Figure 1 the view from direction A in

[0015] Figure 3 is Figure 1 the view from direction B in

[0016] Figure 4 is Figure 3 the sectional view taken along line D-D in

[0017] Figure 5 is Figure 1 the view from direction C in

[0018] Figure 6 This is the usage effect diagram after the present utility model is installed with a camshaft;

[0019] Figure 7 is Figure 6 a sectional view of.

[0020] In the figure: 1 - fixed chassis; 2 - fixed bracket; 3 - upper fixed platform; 4 - lower fixed platform; 5 - upper positioning hole; 6 - lower positioning hole; 7 - bottom positioning hole; 8 - fastening bolt; 9 - anti-rotation pin shaft; 10 - camshaft. Specific implementation manner

[0021] The present utility model will be further described below in conjunction with the drawings and embodiments. In the following detailed description, only some exemplary embodiments of the present utility model are described by way of illustration. Undoubtedly, those of ordinary skill in the art can recognize that various different ways can be used to modify the described embodiments without departing from the spirit and scope of the present utility model. Therefore, the drawings and the description are illustrative in nature and are not used to limit the protection scope of the claims.

[0022] Embodiment 1:

[0023] As Figures 1 to 7 collectively shown, the fixed tooling for camshaft arc machining includes a fixed chassis 1, a fixed bracket 2 is installed on the fixed chassis 1, the fixed bracket 2 extends horizontally with an upper fixed platform 3 and a lower fixed platform 4, an upper positioning hole 5 is provided on the upper fixed platform 3, a lower positioning hole 6 is provided on the lower fixed platform 4, a bottom positioning hole 7 is provided on the fixed chassis 1, the upper positioning hole 5, the lower positioning hole 6 and the bottom positioning hole 7 are arranged vertically aligned, a fastening bolt 8 is provided on the upper fixed platform 3, and an anti-rotation pin shaft 9 is provided on the lower fixed platform 4; the camshaft 10 to be processed is sequentially placed into the upper positioning hole 5, the lower positioning hole 6 and the bottom positioning hole 7, then the camshaft 10 is rotated to align its shaft hole with the through hole, the anti-rotation pin shaft 9 is inserted, and then the fastening bolt 8 is tightened to perform the cam machining on one side. After machining one side of the camshaft 10, the camshaft 10 is taken out and axially rotated 180 degrees, then the anti-rotation pin shaft 9 is inserted, and the fastening bolt 8 is tightened to perform the cam machining on the other side. Since the camshaft 10 is fixed by the anti-rotation pin shaft 9, axial rotation during machining is prevented. Since the camshaft 10 is positioned vertically by the upper positioning hole 5, the lower positioning hole 6 and the bottom positioning hole 7, the shaking of the camshaft 10 is avoided. In addition, the fastening bolt 8 further abuts against the camshaft 10 to fix the camshaft 10 from multiple levels, and the operation is very convenient, which not only ensures the machining accuracy but also improves the machining efficiency.

[0024] As Figure 1 and Figure 6As shown together, the fixed chassis 1 is a disc, the bottom positioning hole 7 is a round hole, and the diameter of the bottom positioning hole 7 is equal to the outer diameter of the shaft rod of the camshaft 10. The fixed chassis 1 being a disc is not only easy to machine but also has strong stability. The bottom positioning hole 7 being a round hole is for positioning the bottom of the camshaft 10, and the diameter of the bottom positioning hole 7 being adapted to the outer diameter of the camshaft 10 can more effectively clamp the camshaft 10 and prevent it from shaking.

[0025] As Figure 1 and Figure 2 As shown together, the upper fixed platform 3 is a rectangular plate-like structure, the upper positioning hole 5 is a round hole, and the diameter of the upper positioning hole 5 is equal to the outer diameter of the shaft rod of the camshaft 10. The upper fixed platform 3 extends the fixed bracket 2 to provide space for the installation of the camshaft 10. The upper positioning hole 5 being a round hole is convenient for machining and for positioning the upper part of the camshaft 10.

[0026] As Figure 1 and Figure 2 As shown together, the lower fixed platform 4 is a rectangular plate-like structure, the lower positioning hole 6 is a round hole, the diameter of the lower positioning hole 6 is equal to the diameter of the upper positioning hole 5, and the upper positioning hole 5, the lower positioning hole 6, and the bottom positioning hole 7 are coaxially arranged. The lower fixed platform 4 extends the fixed bracket 2 to provide space for the installation of the camshaft 10. The lower positioning hole 6 being a round hole is convenient for machining and for positioning the lower part of the camshaft 10. The camshaft 10 sequentially passes through the upper positioning hole 5, the lower positioning hole 6, and the bottom positioning hole 7 arranged up and down, and is firmly fixed in the tooling and will not shake during machining.

[0027] As Figure 1 As shown, a threaded hole is provided on the side of the upper fixed platform 3, the threaded hole extends into the upper positioning hole 5, and a fastening bolt 8 is threadedly installed in the threaded hole. The fastening bolt 8 abuts against the camshaft 10 from the side to further fix the camshaft 10 and prevent it from moving up and down.

[0028] As Figure 1 As shown, a through hole is provided on the side of the lower fixed platform 4, the through hole penetrates the lower positioning hole 6, and an anti-rotation pin shaft 9 is detachably installed in the through hole. The anti-rotation pin shaft 9 penetrates the camshaft 10 and is fixed on the lower fixed platform 4 to avoid its axial rotation and up and down movement during machining.

[0029] Embodiment 2:

[0030] The technical solution of this embodiment is basically the same as that of Embodiment 1, and the difference lies in:

[0031] As Figure 1 and Figure 5As commonly shown, the upper positioning hole 5 and the lower positioning hole 6 are polygonal holes, and the axis of the inscribed circle of the polygonal hole is coaxial with the bottom positioning hole 7. The upper positioning hole 5 and the lower positioning hole 6 can also be polygonal, which is more convenient for the installation of the camshaft 10, reduces the frictional resistance during installation, and the inner wall of the polygonal hole is tangent to the outer wall of the camshaft 10, making the up-and-down installation of the camshaft 10 more convenient without affecting positioning.

[0032] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 construed as a limitation to the present invention.

[0033] Only some exemplary embodiments of the present invention have been described by way of illustration above. Without doubt, for those of ordinary skill in the art, various different ways can be used to modify the described embodiments without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as a limitation to the scope of protection of the claims of the present invention.

Claims

1. Fixed tooling for camshaft arc machining, characterized in that: It includes a fixed chassis (1), on which a fixed bracket (2) is installed. The fixed bracket (2) extends horizontally to have an upper fixed platform (3) and a lower fixed platform (4). An upper positioning hole (5) is formed on the upper fixed platform (3), and a lower positioning hole (6) is formed on the lower fixed platform (4). A bottom positioning hole (7) is formed on the fixed chassis (1). The upper positioning hole (5), the lower positioning hole (6), and the bottom positioning hole (7) are arranged vertically aligned. A fastening bolt (8) is provided on the upper fixed platform (3), and an anti-rotation pin shaft (9) is provided on the lower fixed platform (4).

2. The fixture for fixing the machining of the camshaft arc according to claim 1, wherein: The fixed chassis (1) is a disc, the bottom positioning hole (7) is a round hole, and the diameter of the bottom positioning hole (7) is equal to the outer diameter of the shaft rod of the camshaft (10).

3. The fixed tooling for machining the circular arc of the camshaft according to claim 2, characterized in that: The upper fixed platform (3) is a rectangular plate-like structure, the upper positioning hole (5) is a round hole, and the diameter of the upper positioning hole (5) is equal to the outer diameter of the shaft rod of the camshaft (10).

4. The fixture for fixing the machining of the camshaft arc according to claim 3, characterized in that: The lower fixed platform (4) is a rectangular plate-like structure, the lower positioning hole (6) is a round hole, the diameter of the lower positioning hole (6) is equal to the diameter of the upper positioning hole (5), and the upper positioning hole (5), the lower positioning hole (6), and the bottom positioning hole (7) are coaxially arranged.

5. The fixture for fixing the camshaft arc machining according to claim 2, wherein: The upper positioning hole (5) and the lower positioning hole (6) are polygonal holes, and the axis of the inscribed circle of the polygonal hole is coaxial with the bottom positioning hole (7).

6. The fixed tooling for camshaft arc machining according to claim 1, characterized in that: A threaded hole is formed on the side surface of the upper fixed platform (3), the threaded hole extends into the upper positioning hole (5), and the fastening bolt (8) is threadedly installed in the threaded hole.

7. The fixture for fixing the machining of the camshaft arc according to any one of claims 1 to 6, characterized in that: A through hole is formed on the side surface of the lower fixed platform (4), the through hole penetrates through the lower positioning hole (6), and the anti-rotation pin shaft (9) is detachably installed in the through hole.

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