Grinding machine clamp for machining end faces of shaft sleeve type parts

Abstract

The utility model belongs to the technical field of machining, and discloses a grinding machine clamp for machining the end face of a shaft sleeve part, which comprises a clamp body (1), the outer contour of the clamp body (1) is square, and the middle part of the clamp body (1) is of a hollow triangular structure; square slideways (5) are arranged on the left side surface and the right side surface of the clamp body (1); the fixed plate (2) is arranged in the square slideway (5) of the clamp body (1) and can slide along the square slideway (5); the base plate (3) is adhered to the inner side of the fixing plate (2), a threaded hole is formed in the front side face of the clamp body (1), and the inside hexagonal bolt (6) penetrates through the threaded hole in the front side of the clamp body (1) and is used for pushing the fixing plate (2). The clamp is simple in structure, large in contact area, safe and reliable in clamping, convenient and fast to operate, low in production cost and capable of adapting to grinding machining of the end faces of various shaft sleeve type parts, a plurality of parts can be machined through one-time clamping, and stability and accuracy in the part machining process are guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical processing technology, specifically relating to a grinding machine fixture for processing the end face of bushing-type parts. Background Technology

[0002] A grinding machine is a machine tool used for precision machining. It uses a high-speed rotating grinding wheel to grind the surface of a part, removing tiny layers of material to achieve the required precision and surface roughness. For bushing-type parts with high requirements for end face dimensions and positional tolerances, only horizontal surface grinders can be used for machining. The following two machining methods are commonly used:

[0003] The first method is to place the part directly on the magnetic worktable of the surface grinder when the length-to-diameter ratio is small, and block it around the edges. The disadvantage of this method is that the grinding depth is small each time, the worktable moves slowly, and the grinding force is small, resulting in low production efficiency. It is also necessary to prevent the part from flying out during grinding due to insufficient attraction, which could cause a safety accident.

[0004] The second type is when the length-to-diameter ratio of the part is greater than 5. The part needs to be clamped on a fixture, and then the fixture is placed on the magnetic worktable of the grinding machine. The fixture clamps one part at a time, and the grinding wheel and the part need to be repositioned each time, resulting in low production efficiency and poor part consistency. Alternatively, the fixture can clamp multiple parts at a time, but the fixture structure is complex, the rigidity and strength are insufficient, the fixture is prone to deformation and has low accuracy, and it cannot meet the accuracy requirements such as the size and position tolerance of the parts. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] The technical problem this invention aims to solve is: how to improve production efficiency while ensuring stability and accuracy during the grinding process of parts.

[0007] (II) Technical Solution

[0008] To solve the above-mentioned technical problems, this utility model provides a grinding machine fixture for machining the end face of bushing-type parts, including a fixture body 1. The outer contour of the fixture body 1 is square, and the middle part is set as a hollow triangular structure. The left and right sides of the fixture body 1 are provided with square slide rails 5. The fixing plate 2 is set in the square slide rails 5 of the fixture body 1 and can slide along it. The pad 3 is adhered to the inner side of the fixing plate 2. The front side of the fixture body 1 is provided with a threaded hole, and the internal hex bolt 6 passes through the threaded hole on the front side of the fixture body 1 to push the fixing plate 2.

[0009] The parts to be processed are neatly arranged within the triangular area of ​​the fixture.

[0010] Preferably, the thickness of the fixture is 0.6 times the length of the part to be processed.

[0011] Preferably, the clamping body material is CrWMn with a quenching hardness of HRC58-62.

[0012] Preferably, the two ends of the fixing plate extend 10-20mm beyond the outside of the clamping body.

[0013] Preferably, the gap between the fixing plate and the square slide of the clamp is 0.2-0.4mm.

[0014] Preferably, the pad material is nylon.

[0015] Preferably, the pad is bonded to the fixing plate with epoxy resin adhesive.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, this utility model has the following beneficial effects: by clamping bushing-type parts in the V-shaped area of ​​the fixture, and using the rotating internal hexagonal bolts to push the fixing plate and the pad to clamp the parts, the freedom of the parts is restricted in the radial direction. The fixture has a simple structure, a large contact area, safe and reliable clamping, convenient operation, and low production cost. It can adapt to the end face grinding of various bushing-type parts, and multiple parts can be processed in one clamping. It ensures the stability and accuracy of the parts processing, effectively improves the processing accuracy and part consistency, guarantees the processing quality of parts, and significantly improves production efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a grinding machine fixture structure for machining the end face of bushing-type parts according to the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of a grinding machine fixture for processing the end face of bushing-type parts according to this utility model when clamping the workpiece;

[0020] Explanation of reference numerals in the attached diagram: 1. Clamp body; 2. Fixing plate; 3. Pad plate; 4. Part to be processed; 5. Square slide; 6. Socket head bolt. Detailed Implementation

[0021] To make the objectives, contents, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0022] like Figures 1-2 As shown, this embodiment requires the processing of a bushing-type part. The two end faces of the part need to be ground. The fixture of this utility model uses the outer circle of the part as the radial positioning reference and the lower end face of the part as the axial positioning reference, so that the design reference and the processing reference coincide, ensuring that the size and position accuracy of the part are consistent. The fixture uses V-shaped positioning, and multiple parts can be processed at one time. The positioning is accurate, the clamping is firm and reliable, and the production efficiency is greatly improved.

[0023] This embodiment provides a grinding machine fixture for machining the end face of bushing-type parts. The fixture includes a fixture body 1, which is rectangular in shape and has a hollowed-out triangular structure inside. The left and right sides of the fixture body 1 are provided with square slides 5. A fixing plate 2 is disposed in the square slides 5 of the fixture body 1 and can move along them. A pad 3 is attached to the inner side of the fixing plate 2 (i.e., the side closer to the part). The front side of the fixture body 1 is provided with a threaded hole. The internal hex bolt 6 passes through the threaded hole on the front side of the fixture body 1 to push the fixing plate 2 and the pad 3 to clamp the part.

[0024] Preferably, the fixture body has a rectangular outer shape and a triangular inner structure. The rectangular structure of the fixture body can increase the contact area with the magnetic worktable of the surface grinder, increase the magnetic attraction force, reduce the vibration and shaking of the parts, and eliminate the safety hazard of the parts flying out. The triangular structure of the fixture body used to clamp the parts can effectively distribute and bear the clamping force, improve the stability of the fixture, and quickly position and clamp the parts, reducing the clamping and adjustment time of the parts and improving efficiency.

[0025] Preferably, the thickness of the fixture is determined according to the thickness of the part, generally 0.6 times the thickness of the part; most of the part is clamped in the fixture, the clamping is safe and secure, and a larger grinding force and moving speed can be used for processing, thereby improving processing efficiency.

[0026] Preferably, the precision requirements of the two planes of the fixture and the two sides of the inner triangle are one precision grade higher than those of the workpiece to be processed, and the reliability is verified by the process capability index CPK≥1.67, laying a good foundation for processing parts that meet the precision requirements.

[0027] Preferably, the fixture body material is selected from alloy tool steel such as CrWMn, with a quenching hardness of HRC58-62, which has good strength and toughness, and is wear-resistant and not easily deformed.

[0028] Preferably, the clamp body is provided with a square slide.

[0029] Preferably, the fixing plate is disposed inside the sliding track of the clamping body, with both ends of the fixing plate extending 10-20mm beyond the outer side of the clamping body, and the gap between the fixing plate and the square sliding track of the clamping body is 0.2-0.4mm.

[0030] Preferably, the pad is located on the side of the fixing plate close to the part. The pad is bonded to the fixing plate with epoxy resin. The pad is made of nylon, which is wear-resistant and corrosion-resistant, preventing damage to the surface of the part and eliminating gaps in the outer diameter tolerance of bushing-type parts, thus ensuring stable clamping and accurate positioning of the part.

[0031] Preferably, the internal hex bolt passes through the clamping body and connects with the fixing plate, and rotating the internal hex bolt pushes the fixing plate and the pad to clamp the parts.

[0032] The working process and principle of this utility model are as follows: During clamping, place the fixture on the flat plate, loosen the hexagon socket bolt by turning it counterclockwise, slide the fixing plate and pad to the front end (closest to the bolt), then neatly arrange the parts in the triangular area of ​​the fixture, pre-tighten the hexagon socket bolt clockwise, so that the fixing plate drives the pad to clamp the parts with a little force, gently tap the upper surface of the parts with a copper hammer to make the lower surface of the parts fit tightly with the flat plate, tighten the hexagon socket bolt clockwise again, so that the fixing plate drives the pad to clamp the parts. Using the lower surface and outer circle of the parts as a reference, ensure that the parts to be processed are accurately positioned and firmly clamped. Place the fixture on the magnetic worktable of the surface grinder. After machining the upper surface, rotate the hexagon socket bolt counterclockwise, slide the fixing plate and pad forward, remove the parts, clean the magnetic worktable and fixture, turn the parts around and clamp them, and repeat the above process to machine the other end of the parts. After machining, loosen the hexagon socket bolt and remove the parts.

[0033] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A grinding machine fixture for machining the end face of bushing-type parts, characterized in that, It comprises a clamp body (1), a fixed plate (2), a gasket (3) and an internal hexagonal bolt (6), the clamp body (1) is square in outer contour and is provided with a hollow triangular structure in the middle part; the left and right sides of the clamp body (1) are provided with square slides (5); the fixed plate (2) is arranged in the square slides (5) of the clamp body (1) and can slide along the square slides (5); the gasket (3) is adhered to the inner side of the fixed plate (2); the front side of the clamp body (1) is provided with a threaded hole, and the internal hexagonal bolt (6) passes through the threaded hole of the front side of the clamp body (1) to push the fixed plate (2).

2. The grinder fixture for machining the end face of the shaft sleeve type part according to claim 1, characterized in that, The parts to be machined are arranged in the triangular area of the clamp body in an orderly manner.

3. The grinder fixture for machining the end face of the shaft sleeve type part according to claim 1, characterized in that, The thickness of the clamp body is 0.6 times the length of the parts to be machined.

4. The grinder fixture for machining the end surface of the shaft sleeve part according to claim 1, wherein The material of the clamp body is CrWMn, and the quenching hardness is HRC58-62.

5. The grinder fixture for machining the end surface of the shaft sleeve part according to claim 1, wherein The two ends of the fixed plate extend out of the clamp body by 10-20 mm.

6. The grinder fixture for machining the end surface of the shaft sleeve type part according to claim 1, wherein The gap between the fixed plate and the square slides of the clamp body is 0.2-0.4 mm.

7. The grinder fixture for machining the end surface of the shaft sleeve type part according to claim 1, wherein The material of the gasket is nylon.

8. The grinder fixture for machining the end surface of the shaft sleeve type part according to claim 1, wherein The gasket is bonded to the fixed plate by epoxy resin adhesive.

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