A special fixture for milling a sleeve profile

Abstract

The utility model discloses a special fixture of milling cuff shape belongs to mechanical technical field. It includes bottom plate, vertical block, positioning pin and end cover, bottom plate top plane is provided with a circular boss I, in the side of boss I, the vertical direction's blind hole of being provided with in bottom plate, the center of boss I is provided with the vertical direction's through -hole I, and the through -hole I is through in bottom plate, in the side of boss I, the top of bottom plate edge place is provided with the vertical block of rectangular body shape, and the vertical block is welded fixed on bottom plate, and positioning pin cooperation installs in the blind hole on bottom plate, the side of end cover board surface is provided with a circular annular boss II, and end cover places in boss I, and boss II is arranged downward, and the center of end cover is provided with a through -hole II, and boss II and through -hole II all with bottom plate concentric. The utility model has solved the problem of workpiece deformation, unable to process or unable to guarantee the machining accuracy when processing cuff annular curved surface because of clamping difficulty.

Description

Technical Field

[0001] This utility model relates to a special fixture for milling the shape of a sleeve, belonging to the field of mechanical technology. Background Technology

[0002] In the field of machining, as a ring-shaped structural component, the sleeve is difficult to clamp or cannot be clamped by conventional clamping methods such as vises and clamping plates when the curved surface of the part needs to be machined. This makes it difficult to guarantee dimensional requirements and geometric tolerances, resulting in low machining efficiency and even deformation of the part, making it impossible to complete the machining. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, this utility model provides a special fixture for milling the shape of a sleeve. This fixture solves the problem that when machining the annular curved surface of a sleeve, the workpiece is deformed due to the difficulty of clamping, making it impossible to process or guarantee the machining accuracy.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a special fixture for milling the shape of a sleeve, including a base plate, a vertical block, a positioning pin and an end cap. A circular boss I is provided on the top plane of the base plate. A vertical blind hole is provided in the base plate next to the boss I. A vertical through hole I is provided at the center of the boss I. The through hole I penetrates the base plate.

[0005] On one side of boss I, a rectangular block is provided above the edge of the base plate. The block is welded and fixed to the base plate, and the positioning pin is installed in the blind hole on the base plate. On one side of the end cap plate, a circular boss II is provided. The end cap is placed on boss I, with boss II facing downwards. A through hole II is provided at the center of the end cap. Both boss II and through hole II are concentric with the base plate.

[0006] Furthermore, both boss II and through hole II are concentric with boss I.

[0007] Furthermore, boss II, boss I, and the locating pin are fixed in position to each other and jointly position the workpiece.

[0008] Furthermore, the two sides of the upright block are flush with the two sides of the base plate.

[0009] Furthermore, the diameter of boss I is the same as the outer diameter of boss II.

[0010] The beneficial effects of this utility model are: This utility model effectively solves the problems of difficult clamping, inability to guarantee machining accuracy, workpiece deformation, and low machining efficiency when machining on the annular arc of the sleeve. The fixture is fixed on the worktable using screws or a matching vertical plate. The bottom plate boss and the end cover boss are concentric and have the same diameter. The workpiece is fully positioned with the matching locating pin, which facilitates subsequent machining on the annular arc of the sleeve, ensures machining quality, and improves machining efficiency. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the base plate of this utility model.

[0014] Figure 3 This is a schematic diagram of the end cap of this utility model.

[0015] Figure 4 This is a schematic diagram of the present invention in use.

[0016] Figure 5 This is a schematic diagram of a clamp.

[0017] Numbering on the map: 1. Base plate, 101. Boss I, 102. Blind hole, 103. Through hole I, 2. Stand block, 3. Locating pin, 4. End cap, 401. Boss II, 402. Through hole II, 5. Hoop. Detailed Implementation

[0018] like Figure 1 As shown in Figure 5, a special fixture for milling the shape of a sleeve includes a base plate 1, a vertical block 2, a positioning pin 3, and an end cap 4. A circular boss I101 is provided on the top plane of the base plate 1. A vertical blind hole 102 is provided in the base plate 1 next to the boss I101. A vertical through hole I103 is provided at the center of the boss I101, and the through hole I103 penetrates the base plate 1.

[0019] On one side of the boss I 101, a rectangular block 2 is provided above the edge of the base plate 1. The two sides of the block 2 are flush with the two sides of the base plate 1. The block 2 is welded and fixed to the base plate 1. The positioning pin 3 is installed in the blind hole 102 on the base plate 1. A circular boss II 401 is provided on one side of the end cover 4. The end cover 4 is placed on the boss I 101, with the boss II 401 facing downward. A through hole II 402 is provided at the center of the end cover 4. Both the boss II 401 and the through hole II 402 are concentric with the base plate 1. At the same time, both the boss II 401 and the through hole II 402 are also concentric with the boss I 101.

[0020] The diameter of boss I 101 is the same as the outer diameter of boss II 401; boss II 401, boss I 101 and locating pin 3 are fixed in position to each other and are used together as the sleeve 5 of the workpiece for positioning.

[0021] The base plate 1 and end cap 4 are made of 25CrMnSiA material, and the material standard is GB / T11251-2020. The positioning pin 3 is made of 40Cr material, and the material standard is GB / T3077-2015.

[0022] How to use: 1) During machining, first fix the fixture to the boring machine worktable using pressure plates and screws, or fix it to the milling machine worktable using a vertical plate, ensuring that the fixture is parallel to the machine tool's x-axis; 2) Install the positioning pin 3 in the blind hole 102 on the base plate 1, ensuring a tight fit; 3) Install the workpiece on the base plate 1 according to the position of the boss 101 and the positioning pin 3. The boss 101 is fitted into the ring of the sleeve 5, and the small round hole below the corner of the sleeve 5 is fitted to pass through the positioning pin 3. 4) Install end cap 4, and insert boss II 401 into the ring body of sleeve 5. The screw passes through the through hole 402 on end cap 4 and the through hole I103 on boss I 101 and is tightened. The two bosses and the positioning pin 3 completely position the workpiece. 5) Machining the arc-shaped groove of sleeve 5; 6) After processing, unscrew the clamping nut, remove end cap 4, and unload the workpiece.

[0023] This fixture makes full use of the workpiece itself for positioning. By using two bosses and pins for positioning, it reduces the deformation problem caused by the thin wall thickness of the sleeve 5 during processing, and avoids the traditional process of multiple alignments, effectively ensuring processing accuracy and improving production efficiency.

Claims

1. A special fixture for milling the shape of a sleeve, characterized in that: Includes a base plate (1), a stand (2), a positioning pin (3) and an end cap (4). A circular boss I (101) is provided on the top plane of the base plate (1). A vertical blind hole (102) is provided in the base plate (1) on one side of the boss I (101). A vertical through hole I (103) is provided at the center of the boss I (101). The through hole I (103) penetrates the base plate (1). On one side of the boss I (101), a rectangular block (2) is provided above the edge of the base plate (1). The block (2) is welded and fixed on the base plate (1). The positioning pin (3) is installed in the blind hole (102) on the base plate (1). On one side of the end cap (4), a circular boss II (401) is provided. The end cap (4) is placed on the boss I (101) with the boss II (401) facing downward. A through hole II (402) is provided at the center of the end cap (4). Both the boss II (401) and the through hole II (402) are concentric with the base plate (1).

2. The special fixture for milling the shape of a sleeve according to claim 1, characterized in that: Both boss II (401) and through hole II (402) are concentric with boss I (101).

3. A special fixture for milling the shape of a sleeve according to claim 1, characterized in that: The boss II (401), boss I (101) and locating pin (3) are fixed in position to each other and jointly position the workpiece.

4. A special fixture for milling the shape of a sleeve according to claim 1, characterized in that: The two sides of the upright block (2) are flush with the two sides of the base plate (1).

5. A special fixture for milling the shape of a sleeve according to claim 1, characterized in that: The diameter of boss I (101) is the same as the outer diameter of boss II (401).

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