Special-shaped eccentric cylindrical grinding tool

Abstract

The utility model relates to a special-shaped eccentric cylindrical grinding tool which comprises a locking cushion block, a core rod and a locking assembly, an eccentric positioning column is formed on any face, facing to each other, of the locking cushion block and the core rod, and a workpiece is arranged on the periphery of the eccentric positioning column in a sleeved mode and located between the locking cushion block and the core rod. The locking assembly is used for driving the locking cushion block and the core rod to be close to each other to lock a workpiece, clamping points are arranged in the centers of the outward faces of the locking cushion block and the core rod, the two clamping points coincide with the axis of the workpiece, clamping, rotating and polishing are facilitated by arranging the clamping points on the surfaces of the locking cushion block and the core rod through an external tool, the surface of the workpiece cannot be damaged, and the workpiece can be conveniently polished. And the problem that the center of the workpiece is difficult to clamp and machine is solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of workpiece external cylindrical grinding equipment, specifically relating to an irregularly shaped eccentric external cylindrical grinding fixture. Background Technology

[0002] Currently, external cylindrical grinding has long been a difficult process for workpieces with eccentric inner holes because it is difficult to accurately clamp the center of the workpiece for rotational grinding during the clamping process. There is a lack of ways to correct the center during the processing. This solution was developed to address this problem. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide an irregularly shaped eccentric external cylindrical grinding fixture, which fixes the workpiece by setting the fixture, and then clamps the fixture onto the equipment for processing, with accurate positioning and fast assembly.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an irregularly shaped eccentric external cylindrical grinding fixture, including a locking pad, a mandrel, and a locking assembly. An eccentric positioning post is formed on either side of the locking pad and the mandrel facing each other. The workpiece is sleeved on the outer periphery of the eccentric positioning post and located between the locking pad and the mandrel. The locking assembly is used to drive the locking pad and the mandrel to move closer to each other to lock the workpiece. The center of the outer side of the locking pad and the mandrel has a clamping point, and the two clamping points coincide with the axis of the workpiece.

[0005] Furthermore, the locking assembly includes a connecting post, the locking pad or core rod has a countersunk hole, the eccentric positioning post has a connecting hole, the countersunk hole and the connecting hole correspond to each other, the countersunk hole of the connecting post extends into the connecting hole for connection, and the head of the connecting post is locked in the countersunk hole.

[0006] Furthermore, the clamping point on the outward-facing side of the locking pad and the core rod is provided with a positioning groove, and the axis of the positioning groove coincides with the clamping point.

[0007] Furthermore, the external cylindrical grinding fixture also includes a base, on both sides of the upper surface of the base, with the upper surfaces of the two support columns being flush, and the lower surfaces of the locking pad and the mandrel being flat.

[0008] Furthermore, the upper surfaces of the locking pad and the core rod are flat.

[0009] Furthermore, the eccentric positioning post can be detachably connected to the locking pad or the mandrel.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] This invention features an eccentric positioning post on either surface of the locking pad and the mandrel, which are facing each other. The eccentric positioning post is used to fit the irregular eccentric hole on the workpiece, thus fixing the workpiece. Then, the locking assembly drives the locking pad and the mandrel to move closer together and clamp the workpiece. The workpiece is then clamped according to the clamping points on the surfaces of the locking pad and the mandrel, allowing it to rotate around an axis on the processing equipment. By using external tooling, clamping points are set on the surfaces of the locking pad and the mandrel, facilitating clamping, rotation, and grinding. This not only avoids damaging the workpiece surface but also solves the problem of difficult center clamping and processing of the workpiece. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of an irregularly shaped, eccentric external cylindrical grinding fixture after the workpiece has been installed according to this utility model.

[0013] Figure 2 This is a three-dimensional structural diagram of an irregularly shaped, eccentric external cylindrical grinding fixture according to the present invention.

[0014] Figure 3 This is a three-dimensional structural diagram of the locking pad and the core rod in this utility model;

[0015] Figure 4 This is a cross-sectional view of the locking pad and the core rod in this utility model;

[0016] Figure 5 This is a cross-sectional view of the eccentric positioning column and the mandrel in this utility model.

[0017] The markings in the diagram are: 1. Locking pad; 11. Countersunk hole; 2. Mandrel; 21. Eccentric positioning post; 211. Connecting hole; 212. Square locking block; 22. Square positioning groove; 3. Connector; 4. Base; 41. Support post; 5. Positioning groove; 6. Workpiece. Detailed Implementation

[0018] To make the above-mentioned features and advantages of this utility model more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings for detailed explanation.

[0019] like Figures 1-4 As shown, this embodiment provides an irregularly shaped eccentric external cylindrical grinding fixture, including a locking pad 1, a mandrel 2, a locking assembly, and a base 4.

[0020] An eccentric positioning post 21 is formed on either side of the locking pad 1 and the core rod 2 facing each other. In this embodiment, the eccentric positioning post 21 is set on the surface of the core rod 2. The shape of the eccentric positioning post 21 is the same as the shape of the irregular eccentric hole on the workpiece 6, and can be adjusted according to the irregular eccentric hole on the workpiece 6.

[0021] Preferably, such as Figure 5As shown, the eccentric positioning post 21 and the mandrel 2 are fixed with bolts. Specifically, the surface of the mandrel 2 is provided with a square positioning groove 22, and the end of the eccentric positioning post 21 is provided with a square locking block 212. The surface of the square locking block 212 is provided with a first threaded hole, and the surface of the mandrel 2 is provided with a first through hole extending to the bottom of the square positioning groove 22. The eccentric positioning post 21 is positioned by the square locking block 212 being engaged with the square positioning groove 22, and then the eccentric positioning post 21 is fixed by the bolt being screwed through the first through hole and into the first threaded hole, allowing the eccentric positioning post 21 to be quickly replaced as needed. After the square locking block 212 is engaged with the square positioning groove 22, the surface of the square locking block 212 is flush with or lower than the surface of the mandrel 2.

[0022] The locking pad 1 and the core rod 2 have a clamping point at the center of their outward-facing surfaces. Specifically, to facilitate clamping, a positioning groove 5 is provided at the clamping point of the locking pad 1 and the core rod 2. The axis of the positioning groove 5, the axis of the locking pad 1, the axis of the core rod 2 and the axis of the installed workpiece 6 coincide to ensure coaxial positioning.

[0023] The locking assembly is used to drive the locking pad 1 and the core rod 2 to move closer to each other to lock the workpiece 6. Specifically, the locking assembly includes a connecting post. The locking pad 1 or the core rod 2 has a countersunk hole 11. The eccentric positioning post 21 has a connecting hole 211. The countersunk hole 11 and the connecting hole 211 correspond to each other. The countersunk hole 11 of the connecting post extends into the connecting hole 211 for connection. The head of the connecting post is locked in the countersunk hole 11. The connecting part 3 is a bolt. The connecting hole 211 is a threaded hole.

[0024] Two support columns 41 are formed on both sides of the upper surface of the base 4. The upper surfaces of the two support columns 41 are flush. The lower surfaces of the locking pad 1 and the core rod 2 are flat. The base 4 is set up to facilitate the adjustment and positioning of the workpiece 6. During the installation process, the workpiece 6 is first put on the eccentric positioning column 21. Then the locking pad 1 is brought close and the bolt is screwed in to achieve initial positioning. At this time, the overlap of the axes of the locking pad 1, the core rod 2 and the workpiece 6 has not yet met the requirements. Then the locking pad 1 and the core rod 2 are placed on the upper surface of the two support columns 41. Then the connecting piece 3 is tightened. During the horizontal and transverse screwing of the connecting piece 3, the axes of the locking pad 1, the core rod 2 and the workpiece 6 will gradually overlap under the dual positioning of the eccentric positioning column 21 and the connecting hole 211.

[0025] The upper surfaces of the locking pad 1 and the core rod 2 are flat, which reduces the weight of the locking pad 1 and the core rod 2 and facilitates subsequent clamping. Moreover, the circumferential surfaces on both sides of the locking pad 1 and the core rod 2 are arc-shaped, and the centers of the two arc-shaped surfaces coincide. This is to facilitate clamping the locking pad 1 or the core rod 2 with the arc-shaped clamp and to open the positioning groove 5 on its surface.

[0026] The foregoing has shown and described the basic principles and main features of this invention, as well as its advantages. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this invention. Various changes and modifications can be made to this invention without departing from its spirit and scope. All such changes and modifications fall within the scope of this invention as defined by the appended claims and their equivalents.

Claims

1. An irregularly shaped, eccentric external cylindrical grinding fixture, characterized in that: The device includes a locking pad, a core rod, and a locking assembly. An eccentric positioning post is formed on either side of the locking pad and the core rod facing each other. The workpiece is sleeved on the outer periphery of the eccentric positioning post and located between the locking pad and the core rod. The locking assembly is used to drive the locking pad and the core rod to move closer to each other to lock the workpiece. The center of the outer side of the locking pad and the core rod has a clamping point, and the two clamping points coincide with the axis of the workpiece.

2. The irregularly shaped eccentric external cylindrical grinding fixture according to claim 1, characterized in that: The locking assembly includes a connecting post, the locking pad or core rod has a countersunk hole, the eccentric positioning post has a connecting hole, the countersunk hole and the connecting hole correspond to each other, the countersunk hole of the connecting post extends into the connecting hole for connection, and the head of the connecting post is locked in the countersunk hole.

3. The irregularly shaped eccentric external cylindrical grinding fixture according to claim 1, characterized in that: The locking pad and the mandrel have a positioning groove at the clamping point on their outward-facing sides, and the axis of the positioning groove coincides with the clamping point.

4. The irregularly shaped eccentric external cylindrical grinding fixture according to claim 1, characterized in that: The external cylindrical grinding fixture also includes a base, on which two support columns are formed on both sides of the upper surface of the base. The upper surfaces of the two support columns are flush, and the lower surfaces of the locking pad and the mandrel are flat.

5. The irregularly shaped eccentric external cylindrical grinding fixture according to claim 4, characterized in that: The upper surfaces of the locking pad and the core rod are flat.

6. The irregularly shaped eccentric external cylindrical grinding fixture according to claim 1, characterized in that: The eccentric positioning post can be detachably connected to the locking pad or mandrel.

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