Auxiliary clamp for machining shaft workpieces

Abstract

The utility model belongs to the technical field of shaft machining, and particularly relates to an auxiliary clamp for shaft workpiece machining. An auxiliary clamp for shaft workpiece machining comprises a bottom plate, a fixed part and a movable part are arranged on the two sides of the bottom plate, the fixed part and the movable part are arranged in a spaced mode in the left-right direction, an avoiding groove is formed between the fixed part and the movable part, and arc-shaped grooves with opposite openings are formed in the opposite faces of the fixed part and the movable part. The distance between the middles of the two arc-shaped grooves is larger than the distance between the upper ends and the lower ends of the two arc-shaped grooves, a containing groove used for containing the shaft workpieces is formed between the two arc-shaped grooves, and the containing groove is located on the upper side of the receding groove and communicates with the receding groove. A movable block capable of moving in the vertical direction is arranged between the two movable parts, and the movable parts move close to the fixed part under the extrusion action of the movable block; and the fixed part and the movable part are provided with a cavity which is convenient for the deformation of the movable part below the avoiding groove. The device has the advantage of improving the machining effect of shaft workpieces.

Description

Technical Field

[0001] The utility model belongs to the technical field of shaft processing, in particular to an auxiliary clamp for processing shaft workpieces. Background Art

[0002] Some shaft workpieces need to be clamped by a fixture when drilling, milling planes or milling keyways. For example, Chinese patent application number 202010425153.6 discloses an auxiliary device for drilling on a shaft, which places the shaft workpiece into a slot and cooperates with the retaining ring groove on the shaft through a positioning plate to achieve axial positioning of the shaft workpiece. However, there is a gap between the shaft workpiece and the inner wall of the slot in this solution. When drilling a hole in the shaft workpiece, the shaft workpiece may vibrate, resulting in poor processing effect on the shaft workpiece. Utility Model Content

[0003] The utility model aims to provide an auxiliary fixture for machining shaft workpieces, which can improve the machining effect of shaft workpieces.

[0004] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: an auxiliary fixture for processing shaft workpieces, comprising a base plate, both sides of the base plate are provided with a fixed part and a movable part symmetrically arranged on the left and right sides, the fixed part and the movable part are spaced apart in the left and right directions and an avoidance groove is formed therebetween, and arc grooves with relatively openings are provided on the opposite surfaces of the fixed part and the movable part, the distance between the middle of the two arc grooves is greater than the distance between the upper ends and the distance between the lower ends of the two arc grooves, and a placement groove for placing shaft workpieces is formed between the two arc grooves, the placement groove is located on the upper side of the avoidance groove and is connected to the avoidance groove; a movable block movable in the up and down directions is provided between the two movable parts, and the movable part moves close to the fixed part under the squeezing action of the movable block; the fixed part and the movable part are provided with a cavity below the avoidance groove to facilitate deformation of the movable part.

[0005] In actual use, the operator places the shaft workpiece to be processed in the placement slot, and then the movable block moves downward to squeeze the movable part. The movable part will move toward the fixed part and deform, so that the aperture between the placement slots becomes smaller to clamp the shaft workpiece. After that, the shaft workpiece can be milled or drilled.

[0006] Some shaft workpieces need to be machined with radially penetrating grooves or holes; wherein, the setting of the avoidance groove can make way for the machining device, thereby facilitating the machining of the grooves or holes.

[0007] Among them, a cavity is provided below the avoidance groove to facilitate the deformation of the movable part, which can facilitate the deformation of the movable part, thereby facilitating the placement of the groove to clamp the shaft workpiece.

[0008] Among them, the distance between the middle of the two arc grooves is greater than the distance between the upper ends and the distance between the lower ends of the two arc grooves, and the two arc grooves constitute a placement groove for clamping shaft workpieces, which can ensure that when the placement groove clamps the shaft workpiece, the shaft workpiece will not be squeezed out from the upper or lower end of the placement groove.

[0009] This solution enables the placement slot to clamp or loosen the shaft workpiece by moving the movable block up and down, thereby reducing the vibration of the shaft workpiece during processing and improving the processing effect of the shaft workpiece.

[0010] Preferably, the movable part includes an oblique section and a vertical section from top to bottom, the side of the oblique section facing the movable block is an inclined surface, the distance between the inclined surfaces of the two movable blocks gradually decreases from top to bottom, and the movable block is provided with an oblique portion cooperating with the oblique section and a vertical portion cooperating with the vertical section.

[0011] The cooperation between the oblique part of the movable block and the two oblique sections enables the movable block to squeeze the oblique sections of the two movable parts during the downward movement, so that the movable block moves toward the fixed block side. At the same time, the vertical section is straightly arranged to cooperate with the vertical part of the movable block, thereby guiding the movable block when it moves up and down, so that the movable block will not deviate.

[0012] Preferably, the oblique section, vertical section, fixing portion and bottom plate enclose the cavity, the circumferential inner edge cross-section of the cavity is rectangular, and the cavity extends toward the vertical section so that the thickness of the vertical section is smaller than that of the oblique section.

[0013] One side wall of the cavity is also one side wall of the vertical section, and the thickness of the vertical section is smaller than that of the oblique section, so that when the movable block squeezes the movable part, the oblique section can be easily deformed to clamp the shaft workpiece.

[0014] Preferably, a driver is provided at the lower end of the base plate, an output end of the driver passes upward through the base plate and is connected to the movable block, and the movable block moves up and down under the action of the driver.

[0015] The driver is set at the lower end of the base plate and will not interfere with processing components such as drills and milling cutters, making it easier to process shaft workpieces.

[0016] Preferably, a positioning piece is provided on the axial side of the placement groove, and the positioning piece is used to contact the end face of the shaft workpiece.

[0017] By providing the positioning piece, the axial position of the shaft workpiece in the placement groove can be ensured, so that the hole or groove processed in the shaft workpiece will not be offset.

[0018] Preferably, the positioning piece is arranged on a positioning plate, the positioning plate is provided with a guide hole that slides with the positioning piece, the positioning plate is provided with a locking hole that extends radially along the guide hole, the locking hole is connected to the guide hole, and the locking hole is threadedly fitted with a locking piece.

[0019] The thread of the locking piece can be screwed to compress the positioning piece. When the locking piece is loosened, the position of the positioning piece in the guide hole can be moved, thereby adapting to the processing of shaft workpieces of different lengths.

[0020] Preferably, the distance between the lower end openings of the two arc-shaped grooves is equal to the width of the avoidance groove.

[0021] The distance between the lower end openings of the two arc-shaped grooves is equal to the width of the avoidance groove, which facilitates the processing of the avoidance groove.

[0022] The utility model has the advantages of being able to quickly clamp shaft workpieces, reducing vibration of the shaft workpieces during processing, and thus improving the processing effect of the shaft workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the present utility model.

[0024] Figure 2 It is a structural diagram of the fixed part and the movable part.

[0025] Figure 3 It is a structural diagram of the fixed part, the movable part and the pressing block.

[0026] Figure numbers: 1. Base; 2. Bottom plate; 3. Driver; 31. Output end of driver; 4. Fixed part; 41. Placement groove; 42. Avoidance groove; 43. Cavity; 5. Movable part; 51. Oblique section; 511. Inclined surface; 52. Vertical section; 6. Positioning piece; 61. Positioning plate; 62. Locking hole; 7. Movable block; 71. Oblique part; 72. Vertical part; 100. Shaft workpiece. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] In this embodiment, the shaft workpiece 100 is processed as a flat key.

[0029] like Figures 1 to 3As shown, this embodiment discloses an auxiliary fixture for machining shaft-type workpieces, comprising a base 1, on which two bottom plates 2 are fixed. A fixed portion 4 and a movable portion 5 are symmetrically arranged on the left and right sides of the bottom plates 2. The two fixed portions 4 and the two movable portions 5 on the bottom plates 2 are symmetrically arranged in the left-right direction, and the fixed portions 4 and the movable portions 5 are spaced apart in the left-right direction. The opposing surfaces of the fixed portions 4 and the movable portions 5 are provided with arcuate grooves with opposing openings. The arcuate grooves of the fixed portions 4 and the movable portions 5 form a placement groove 41 for placing the shaft-type workpiece 100. The distance between the two arcuate grooves is greater than the distance between the upper and lower openings of the two arcuate grooves. The left-right spacing of the fixed portions 4 and the movable portions 5 results in an avoidance groove 42 between them. The avoidance groove 42 is located below the placement groove 41 and is connected to the placement groove 41. The width of the avoidance groove 42 is the same as the width of the lower opening of the placement groove 41.

[0030] like Figures 1 to 3 As shown, a movable block 7 is disposed between the two movable portions 5. The movable portion 5 comprises, from top to bottom, an oblique section 51 and a vertical section 52. The oblique section 51 faces the movable block 7 on a side thereof that is an oblique surface 511. The distance between the oblique surfaces 511 of the two movable blocks 7 gradually decreases from top to bottom. The movable block 7 comprises an oblique portion 71 that cooperates with the oblique section 51 and a vertical portion 72 that cooperates with the vertical section 52. A driver 3 is fixed to the underside of the base 1. The driver 3 is a pneumatic cylinder. The output end 31 of the driver extends upward through the base 1 and the bottom plate 2 to be fixedly connected to the movable block 7. Under the action of the driver, the movable block 7 moves up and down to press the movable portion 5 toward the fixed portion 4. A cavity 43 is disposed below the placement slot 41 between the movable portion 5 and the fixed portion 4. The circumferential inner edge of the cavity 43 has a rectangular cross-section. One sidewall of the cavity 43 also forms a sidewall of the vertical section 52. The cavity 43 extends toward the vertical section 52, making the thickness of the vertical section 52 less than that of the oblique section 51.

[0031] like Figure 1 and Figure 3 As shown, a positioning plate 61 is provided on the base 1, and the positioning plate 61 is located on the axial side of the placement groove 41. A guide hole is provided on the positioning plate 61, and the guide hole is located on the axial side of the placement groove 41. A positioning member 6 is slidably fitted in the guide hole, and the end of the positioning member 6 is used to contact the end of the shaft workpiece 100. The upper end of the positioning plate 61 is provided with a locking hole 62 extending in the up and down directions and connected to the guide hole. The locking hole 62 is threadedly fitted with a locking member (not shown in the figure), and the locking member is a bolt. Tighten the locking member to limit the movement of the positioning member 6 in the guide hole.

[0032] During actual operation, the operator first adjusts the position of the positioning part 6 in the placement groove 41 according to the length of the shaft workpiece 100 and the position of the flat key to be processed, and then places the shaft workpiece 100 in the placement groove 41. Then, the driver 3 is started to lower the movable block 7. The movable block 7 squeezes the movable parts 5 on both sides. The movable parts 5 are deformed and move closer to the side of the fixed part 4 to achieve clamping of the shaft workpiece 100. Then, the processing of the flat key on the shaft workpiece 100 is completed through the processing device.

Claims

1. An auxiliary fixture for machining shaft workpieces, characterized by: The movable part is spaced apart from the fixed part and is spaced apart from the movable part in a left-right symmetrical manner. The fixed part and the movable part are spaced apart in the left-right direction and an avoidance groove is formed therebetween. The opposite surfaces of the fixed part and the movable part are provided with arcuate grooves with relatively openings. The distance between the middles of the two arcuate grooves is greater than the distance between the upper ends and the distance between the lower ends of the two arcuate grooves. A placement groove for placing shaft workpieces is formed between the two arcuate grooves. The placement groove is located on the upper side of the avoidance groove and is connected to the avoidance groove. A movable block that can move in the up and down directions is provided between the two movable parts, and the movable part moves close to the fixed part under the squeezing action of the movable block. The fixed part and the movable part are provided with a cavity below the avoidance groove to facilitate deformation of the movable part.

2. The auxiliary fixture for machining shaft workpieces according to claim 1, characterized in that: The movable part includes an oblique section and a vertical section from top to bottom. The side of the oblique section facing the movable block is an inclined surface. The distance between the inclined surfaces of the two movable blocks gradually decreases from top to bottom. The movable block is provided with an oblique portion cooperating with the oblique section and a vertical portion cooperating with the vertical section.

3. The auxiliary fixture for machining shaft workpieces according to claim 2, characterized in that: The cavity is formed between the oblique section, the vertical section, the fixing portion and the bottom plate. The circumferential inner edge cross-section of the cavity is rectangular. The cavity extends toward the vertical section so that the thickness of the vertical section is smaller than that of the oblique section.

4. The auxiliary fixture for machining shaft workpieces according to claim 1, characterized in that: A driver is provided at the lower end of the base plate, and an output end of the driver passes upward through the base plate and is connected to the movable block. The movable block moves up and down under the action of the driver.

5. The auxiliary fixture for machining shaft workpieces according to any one of claims 1 to 4, characterized in that: A positioning piece is provided on the axial side of the placement groove, and the positioning piece is used to contact the end surface of the shaft workpiece.

6. The auxiliary fixture for machining shaft workpieces according to claim 5, characterized in that: The positioning piece is arranged on the positioning plate, the positioning plate is provided with a guide hole that is slidably matched with the positioning piece, the positioning plate is provided with a locking hole that extends radially along the guide hole, the locking hole is connected to the guide hole, and the locking hole is threadedly matched with the locking piece.

7. The auxiliary fixture for machining shaft workpieces according to any one of claims 1 to 4, characterized in that: The distance between the lower end openings of the two arc-shaped grooves is equal to the width of the avoidance groove.

Images