Clamping tool for radial punching of cam

Abstract

The utility model provides a cam radial punching clamping tool which comprises a tool body and a countersunk bolt, and the tool body is provided with a circular groove, a countersunk threaded hole, a side face positioning plane, a pre-machining positioning hole and a bottom face positioning hole. The circular groove extends from one bottom face of the tool body to the other bottom face of the tool body. The countersunk threaded hole extends from the other bottom face of the tool body to one bottom face of the tool body, and the countersunk bolt is matched with the countersunk threaded hole. The side face positioning plane is located on the side face of the tool body. The pre-machined positioning hole is formed in the side face of the tool body; the bottom surface positioning hole extends from the other bottom surface of the tool body to one bottom surface of the tool body; the threaded blind hole in the cam workpiece is utilized, so that the cam workpiece is positioned on the tool body, and it is guaranteed that the center line of the to-be-machined hole which is vertically punched is at a specific angle relative to the datum line.

Description

Technical Field

[0001] The utility model relates to the technical field of cam processing, in particular to a cam radial punching and clamping tool. Background Art

[0002] In the processing technology of some cam workpieces, it is necessary to process holes on the cylindrical surface of the cam according to the purpose of the cam to ensure that the holes are at a specific angle relative to the reference line set by the cam. This requires designing specific tooling based on the structure of the cam. It only requires positioning the cylindrical bottom surface of the cam, which is simple to clamp and easy to disassemble and assemble. Summary of the invention

[0003] In view of the shortcomings of the prior art, the utility model provides a cam radial punching and clamping fixture, which adopts a fixture of a specific shape. The cam workpiece can be positioned by simply screwing the countersunk bolt into the countersunk threaded hole and the threaded blind hole. The operation is simple, the positioning accuracy is high, and the disassembly and assembly are convenient. The technical solution adopted by the utility model is:

[0004] A cam radial punching fixture is used to locate the hole to be processed on the cam workpiece, comprising a fixture body and a countersunk bolt, wherein the fixture body is provided with

[0005] A circular groove extending from one bottom surface of the tool body to another bottom surface thereof;

[0006] a countersunk threaded hole extending from the other bottom surface of the tool body to one bottom surface thereof, the countersunk bolt being adapted to fit into the countersunk threaded hole;

[0007] A side positioning plane, located on the side of the tooling body;

[0008] Pre-machined positioning holes are located on the side of the tooling body;

[0009] A bottom surface positioning hole extending from the other bottom surface of the tool body to one bottom surface thereof;

[0010] Among them, the circular groove is connected with the bottom surface positioning hole, and the center line of the circular groove and the center line of the bottom surface positioning hole are respectively located on the first axis, the center line of the countersunk threaded hole is parallel to the first axis, the side positioning plane is parallel to the first axis, and the center line of the pre-machined positioning hole is perpendicular to the side positioning plane.

[0011] Further, the cam workpiece comprises a cylindrical portion and a rectangular parallelepiped portion connected in sequence, and a threaded blind hole is provided on the bottom surface of the cylindrical portion away from the rectangular parallelepiped portion;

[0012] The circular groove can accommodate the cylindrical body, and the countersunk bolt can be threadedly connected with the countersunk threaded hole and the threaded blind hole in sequence;

[0013] The center line of the to-be-machined hole of the cam workpiece coincides with the center line of the pre-machined positioning hole.

[0014] Furthermore, two adjacent right-angled sides of the rectangular parallelepiped portion of the cam workpiece are respectively provided with chamfers.

[0015] Furthermore, the diameter of the hole to be processed is smaller than the diameter of the pre-processed positioning hole.

[0016] Furthermore, a workpiece positioning hole is provided through the cam workpiece, and the workpiece positioning hole and a center line thereof are located on the first axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structural composition of the utility model.

[0018] Figure 2 It is a schematic diagram of positioning of the cam workpiece of the utility model.

[0019] In the figure: 100-tool body, 110-circular groove, 120-countersunk threaded hole, 130-side positioning plane, 140-pre-processed positioning hole, 150-bottom positioning hole, 200-countersunk bolt, 300-cam workpiece, 310-cylindrical part, 320-rectangular part, 330-threaded blind hole, 340-hole to be processed, 350-workpiece positioning hole. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] Please refer to the attached Figure 1-2The utility model provides a cam radial punching fixture, which is used to locate the to-be-processed hole 340 on the cam workpiece 300, and includes a fixture body 100 and a countersunk bolt 200. The fixture body 100 is provided with a circular groove 110, a countersunk threaded hole 120, a side positioning plane 130, a pre-processed positioning hole 140, and a bottom surface positioning hole 150; the circular groove 110 extends from one bottom surface of the fixture body 100 to the other bottom surface thereof; the countersunk threaded hole 120 extends from the other bottom surface of the fixture body 100 to one bottom surface thereof, and the countersunk bolt 200 is adapted to fit the countersunk threaded hole 120; The side positioning plane 130 is located on the side of the tooling body 100; the pre-machined positioning hole 140 is located on the side of the tooling body 100; the bottom positioning hole 150 extends from the other bottom surface of the tooling body 100 to one bottom surface thereof; wherein the circular groove 110 is connected to the bottom positioning hole 150, and the center line of the circular groove 110 and the center line of the bottom positioning hole 150 are respectively located on the first axis, the center line of the countersunk threaded hole 120 is parallel to the first axis, the side positioning plane 130 is parallel to the first axis, and the center line of the pre-machined positioning hole 140 is perpendicular to the side positioning plane 130.

[0022] In this embodiment, the specific structure of the cam workpiece 300 is as follows: the cam workpiece 300 includes a cylindrical portion 310 and a rectangular portion 320 connected in sequence, and a threaded blind hole 330 is provided on the bottom surface of the cylindrical portion 310 away from the rectangular portion 320 .

[0023] When the tooling body 100 and the cam workpiece 300 are assembled, the specific connection relationship between the two is: the circular groove 110 can accommodate the cylindrical portion 310, and the countersunk bolt 200 can be threadedly connected with the countersunk threaded hole 120 and the threaded blind hole 330 in sequence; the center line of the to-be-processed hole 340 of the cam workpiece 300 coincides with the center line of the pre-processed positioning hole 140.

[0024] According to the above description, please refer to the attached Figure 2, the tooling body 100 is fixed on its side, and the side positioning plane 130 is in a horizontal state. First, insert the cylindrical part 310 of the cam workpiece 300 into the circular groove 110, and then screw the countersunk bolt 200 into the countersunk threaded hole 120 and the threaded blind hole 330 in turn, and screw the cam workpiece 300 and the tooling body 100 to fix them. At this time, the line between the center of the threaded blind hole 330 and the center of the circular groove 110 is the first straight line. A reference line is radially arranged on the cam workpiece 300, and the first straight line is the reference line rotated counterclockwise by α°. After the cam workpiece 300 is positioned, the side positioning plane 130 is used as a reference, and the drilling is performed vertically downward perpendicular to the side positioning plane 130 to form a hole 340 to be processed. At this time, the center line of the hole 340 to be processed intersects with the first axis, and the second straight line can be understood as being obtained by rotating the reference line counterclockwise by β. It can be seen that, by only utilizing the outer shape of the cam workpiece 300 and the processed threaded blind hole 330 , the bottom and side surfaces of the cam workpiece 300 can be simultaneously positioned, thereby realizing rapid processing of the hole 340 to be processed.

[0025] In this embodiment, the hole 340 to be processed may be a through hole or a threaded hole.

[0026] In this embodiment, the structure of the cam workpiece 300 further includes: two adjacent right-angled sides of the rectangular parallelepiped portion 320 of the cam workpiece 300 are respectively provided with chamfers.

[0027] In order to reserve enough cutting space for the tool and avoid the tool interfering with the tool body 100 , the diameter of the hole to be processed 340 is smaller than the diameter of the pre-processed positioning hole 140 .

[0028] The cam workpiece 300 is penetrated by a workpiece positioning hole 350, and the center line of the workpiece positioning hole 350 is located on the first axis. In addition, the bottom surface positioning hole 150 and the workpiece positioning hole 350 can be utilized. When the tooling body 100 is placed on its side, a horizontal axis is used to penetrate the bottom surface positioning hole 150 and the workpiece positioning hole 350. The axis of the horizontal axis is the first axis, thereby playing the dual role of secondary positioning and workpiece support.

[0029] In summary, the present application utilizes the threaded blind hole in the cam workpiece to position the cam workpiece on the tooling body, ensuring that the center line of the vertically punched hole to be processed is at a specific angle relative to the reference line.

[0030] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A cam radial punching fixture, used for positioning a hole (340) to be processed on a cam workpiece (300), characterized in that: The invention comprises a tool body (100) and a countersunk bolt (200), wherein the tool body (100) is provided with A circular groove (110) extending from one bottom surface of the tool body (100) to another bottom surface thereof; A countersunk threaded hole (120) extending from the other bottom surface of the tool body (100) to one bottom surface thereof, the countersunk bolt (200) being adapted to fit into the countersunk threaded hole (120); A side positioning plane (130) located on a side of the tool body (100); A pre-machined positioning hole (140) is located on a side of the tool body (100); A bottom surface positioning hole (150) extending from the other bottom surface of the tool body (100) to one bottom surface thereof; The circular groove (110) is connected to the bottom surface positioning hole (150), and the center line of the circular groove (110) and the center line of the bottom surface positioning hole (150) are respectively located on the first axis, the center line of the countersunk threaded hole (120) is parallel to the first axis, the side positioning plane (130) is parallel to the first axis, and the center line of the pre-machined positioning hole (140) is perpendicular to the side positioning plane (130).

2. The cam radial punching fixture according to claim 1, characterized in that: The cam workpiece (300) comprises a cylindrical portion (310) and a rectangular parallelepiped portion (320) connected in sequence, and a threaded blind hole (330) is provided on the bottom surface of the cylindrical portion (310) away from the rectangular parallelepiped portion (320); The circular groove (110) can accommodate the cylindrical portion (310), and the countersunk bolt (200) can be threadedly connected with the countersunk threaded hole (120) and the threaded blind hole (330) in sequence; The center line of the to-be-machined hole (340) of the cam workpiece (300) coincides with the center line of the pre-machined positioning hole (140).

3. The cam radial punching fixture according to claim 2, characterized in that: Two adjacent right-angled sides of the rectangular parallelepiped portion (320) of the cam workpiece (300) are respectively provided with chamfers.

4. The cam radial punching fixture according to claim 2, characterized in that: The diameter of the hole to be processed (340) is smaller than the diameter of the pre-processed positioning hole (140).

5. The cam radial punching and clamping tool according to claim 2, characterized in that: A workpiece positioning hole (350) is provided through the cam workpiece (300), and the workpiece positioning hole (350) and a center line thereof are located on a first axis.

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