Fixture for machining inclined holes evenly distributed in circumference of workpiece

Abstract

The utility model provides a clamp for machining inclined holes uniformly distributed on the circumference of a workpiece, so that the inclined holes uniformly distributed on the circumference of the workpiece can be conveniently and quickly machined in a common machining center, the machining strength is reduced, and the working efficiency is improved. The clamp comprises a positioning disc and angle iron which are adjacently arranged, a to-be-machined workpiece is fixedly arranged on the periphery of the positioning disc in a sleeving mode, a plurality of first positioning holes evenly distributed along the circumference are formed in the end face of the side, facing the angle iron, of the positioning disc, and the number and the angle of the first positioning holes are the same as those of to-be-machined inclined holes in the to-be-machined workpiece. Second positioning holes are formed in the angle iron, and the positioning disc and the angle iron are positioned through a positioning pin which penetrates through the second positioning holes and then is inserted into one of the first positioning holes. One end of the screw rod penetrates through the positioning disc and the angle iron and then is connected with the rocker, the screw rod is fixedly connected with the positioning disc, and the screw rod is in clearance fit with the angle iron; and the first positioning hole opposite to the second positioning hole serves as a target hole, and inclined hole machining is conducted on the position, opposite to the target hole, of the workpiece to be machined.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a clamp for processing oblique holes evenly distributed on the circumference of a workpiece. Background Art

[0002] In mechanical processing, inclined hole processing is a very common operation. Generally, a tool with an inclined angle is used to fix the part, or a dividing head is used to clamp and adjust the workpiece angle, or a vertical milling machine is used to adjust the feed angle. The processing is completed by making the inclined hole angle coincide with the tool feed angle. However, when the inclined holes are evenly distributed on the processing circle, the part needs to be rotated in the circumferential direction while being tilted. The previous processing methods are inappropriate. Each hole needs to be re-clamped, which is labor-intensive and inefficient. Although a five-axis machining center can also be used for processing in the prior art, the five-axis machining center has a high processing cost and a small stroke, and cannot process medium and large parts. Utility Model Content

[0003] In view of this, the purpose of the utility model is to overcome the defects in the prior art and provide a fixture for realizing the processing of evenly distributed oblique holes on the circumference of a workpiece, so that the workpiece can be evenly distributed with oblique holes on the circumference of the workpiece conveniently and quickly in an ordinary machining center, thereby reducing machining intensity and improving work efficiency.

[0004] The technical solution of the utility model is:

[0005] The utility model provides a fixture for machining evenly distributed oblique holes on the circumference of a workpiece, comprising:

[0006] A positioning plate and an angle iron are arranged adjacent to each other; the workpiece to be processed is fixedly sleeved on the outer circumference of the positioning plate, and a plurality of first positioning holes evenly distributed along the circumference are arranged on the end surface of the positioning plate facing the angle iron, and the number and angle of the first positioning holes are the same as the number and angle of the inclined holes to be processed on the workpiece to be processed; a second positioning hole is arranged on the angle iron, and the positioning plate and the angle iron are positioned by a positioning pin that passes through the second positioning hole and is inserted into one of the first positioning holes;

[0007] A screw rod, one end of which passes through the positioning plate and the angle iron and is connected to the rocker, the screw rod is fixedly connected to the positioning plate, and the screw rod and the angle iron are clearance-matched;

[0008] The first positioning hole opposite to the second positioning hole is used as a target hole, and the position on the workpiece to be processed opposite to the target hole is subjected to oblique hole processing.

[0009] Preferably, the positioning plate comprises a first positioning portion and a second positioning portion connected in an arc transition, and the outer diameter of the first positioning portion is smaller than the outer diameter of the second positioning portion;

[0010] The workpiece to be processed is sleeved on the outer periphery of the first positioning portion;

[0011] A plurality of first positioning holes are arranged on an end surface of the second positioning portion facing the angle iron.

[0012] Preferably, an oil filling hole connected to the central hole inside the angle iron is provided on the outer surface of the angle iron.

[0013] Preferably, one end of the screw rod passes through the positioning plate and the angle iron and is screwed to a nut, and is indirectly connected to the rocker arm through the nut.

[0014] Preferably, the screw rod is welded to the positioning plate.

[0015] The beneficial effects of the utility model are:

[0016] The screw and the positioning plate are fixedly connected, and the screw and the angle iron are designed to be clearance-fitted. By rotating the rocker, the rocker will drive the screw and the positioning plate to rotate together, thereby driving the workpiece to be processed to rotate. The rocker drives the first positioning hole on the positioning plate to rotate to the relative position to be processed, so that the processing position of the workpiece to be processed is aligned with the position of the milling cutter, so that the processing position of the workpiece to be processed is processed. With the fixture in this scheme, the workpiece to be processed only needs to be clamped once, and the workpiece to be processed installed by the fixture can be processed using a conventional horizontal milling machine or an ordinary horizontal machining center. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a clamp provided in an embodiment of the utility model;

[0018] Figure 2 for Figure 1 D-section diagram. DETAILED DESCRIPTION

[0019] like Figure 1-Figure 2 As shown, a fixture for machining circumferentially uniformly distributed oblique holes in this embodiment includes a positioning plate 1, an angle iron 2, a rocker 3, a nut 4, a screw 5, and a positioning pin 6. The positioning plate 1 and the angle iron 2 are arranged adjacent to each other, and can be arranged in close contact with each other or with a certain gap therebetween.

[0020] In this embodiment, Figure 1As shown, a threaded hole is drilled on the side of the positioning plate 1 facing the workpiece to be processed, and the workpiece can be fixed by a bolt pressure plate. A plurality of first positioning holes evenly distributed along the circumference are provided on the end face of the positioning plate 1 facing the angle iron 2, and the number and angle of the first positioning holes are the same as the number and angle of the inclined holes to be processed on the workpiece to be processed. A second positioning hole is provided on the angle iron 2, and the positioning plate 1 and the angle iron 2 are positioned by a positioning pin 6 that passes through the second positioning hole and is inserted into one of the first positioning holes. The positioning plate 1 processes the first positioning hole at the corresponding angular position of the circumference according to the processing hole angle of the workpiece to be processed, which serves as the angular positioning reference for processing the inclined hole of the product.

[0021] In this embodiment, the head of the screw rod 5 is welded and fixed to the positioning plate 1, the middle outer circle of the screw rod 5 is gap-matched with the middle hole of the angle iron 2, the external thread at one end of the tail of the screw rod 5 is connected with the internal thread of the nut 4, and the rocker arm 5 and the nut 4 are welded and fastened. Therefore, when the rocker arm 5 rotates, it can drive the screw rod 5 and the positioning plate 1 to rotate together.

[0022] In this embodiment, the positioning plate 1 is configured to include a first positioning portion and a second positioning portion connected in a circular arc transition, the outer diameter of the first positioning portion is smaller than the outer diameter of the second positioning portion; the workpiece to be processed is mounted on the outer periphery of the first positioning portion; and a plurality of the first positioning holes are provided on the end face of the second positioning portion facing the angle iron 2.

[0023] In this embodiment, Figure 2 As shown, the positioning pin 6 passes through the second positioning hole on the angle iron 2 and then is inserted into the first positioning hole on the positioning plate 1, thereby limiting the positioning plate 1 and the angle iron 2.

[0024] In this embodiment, an oil filling hole connected to the central hole inside the angle iron 2 is provided on the outer surface of the angle iron 2. Lubricating oil is injected through the oil filling hole provided on the top of the angle iron 2 to reduce the friction resistance caused by rotation. Each pin hole of the positioning plate 1 corresponds to the inclined hole processed by the workpiece. By rotating the rocker 3 and the nut 4, the screw 5 and the positioning plate 1 are driven to rotate, the rotation angle is adjusted, the other first positioning holes are adjusted relative to the second positioning holes, and the positioning pin 6 is inserted to limit the position.

[0025] In this embodiment, the screw rod 5 and the positioning plate 1 are fixedly connected, and the screw rod 5 and the angle iron 2 are designed to be clearance-fitted. By rotating the rocker 3, the rocker 3 will drive the screw rod 5 and the positioning plate 1 to rotate together, thereby driving the workpiece to be processed to rotate. The rocker 3 drives the first positioning hole on the positioning plate 1 to rotate to the relative position to be processed, so that the position to be processed of the workpiece to be processed is aligned with the position of the milling cutter, thereby performing relevant processing on the position to be processed of the workpiece to be processed. Using the clamp in this solution, the workpiece to be processed only needs to be clamped once, and the workpiece to be processed installed by the clamp can be processed using a conventional horizontal milling machine or an ordinary horizontal machining center.

Claims

1. A fixture for machining evenly distributed oblique holes on a workpiece, characterized in that: include: Positioning plates and angle irons arranged adjacently; The workpiece to be processed is fixedly sleeved on the outer circumference of the positioning plate, and a plurality of first positioning holes evenly distributed along the circumference are arranged on one end surface of the positioning plate facing the angle iron, and the number and angle of the first positioning holes are the same as the number and angle of the inclined holes to be processed on the workpiece to be processed; the angle iron is provided with a second positioning hole, and the positioning plate and the angle iron are positioned by a positioning pin that passes through the second positioning hole and is inserted into one of the first positioning holes; A screw rod, one end of which passes through the positioning plate and the angle iron and is connected to the rocker, the screw rod is fixedly connected to the positioning plate, and the screw rod and the angle iron are in clearance fit; The first positioning hole opposite to the second positioning hole is used as the target hole, and the position opposite to the target hole on the workpiece to be processed is subjected to oblique hole processing.

2. The fixture for machining evenly distributed oblique holes on a workpiece according to claim 1 is characterized in that: The positioning plate comprises a first positioning portion and a second positioning portion connected in a circular arc transition, wherein the outer diameter of the first positioning portion is smaller than the outer diameter of the second positioning portion; The workpiece to be processed is sleeved on the outer periphery of the first positioning portion; A plurality of first positioning holes are arranged on an end surface of the second positioning portion facing the angle iron.

3. The fixture for machining evenly distributed oblique holes on a workpiece according to claim 1, characterized in that: An oil filling hole connected to the central hole inside the angle iron is arranged on the outer surface of the angle iron.

4. The fixture for machining evenly distributed oblique holes on a workpiece according to claim 1, characterized in that: One end of the screw rod passes through the positioning plate and the angle iron and is screwed to the nut, and is indirectly connected to the rocker through the nut.

5. The fixture for machining evenly distributed oblique holes on a workpiece according to claim 1, characterized in that: The screw rod is welded to the positioning plate.

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