CN203993246U - Elongate cylinder workpiece clamp for machining - Google Patents

Abstract

A processing fixture for a slender cylindrical workpiece includes a fixture base, a pressure block, and a locking piece. The fixture base is provided with two recesses for respectively accommodating a slender cylindrical workpiece. The two recesses are parallel to each other and staggered from each other. The side faces away from each other form a first limiting surface, and the bottom surface of the concave position forms a second limiting surface; the two sides of the pressing block respectively form a pressing inclined surface for pressing the elongated cylindrical workpiece in the two concave positions, The pressing inclined surface gradually inclines toward the middle part of the pressing block from top to bottom, and the locking piece is used to fix the pressing block on the clamp base. The utility model can expose the upper part of the slender cylindrical workpiece on the upper surface of the pressing block and the fixture base, the fixture will not interfere with the movement of the tool, and the pressing blocks are respectively arranged at different axial positions of the slender cylindrical workpiece, which can effectively prevent The slender cylindrical workpiece moves, vibrates and deforms during processing; multiple workpieces can be processed in one clamping, which improves production efficiency several times.

Description

Fixture for Slender Cylindrical Workpiece Processing

technical field

The utility model relates to a fixture, in particular to a fixture for processing a slender cylindrical workpiece.

Background technique

At present, milling is used to process the longitudinally extending rack tooth profile, plane and guide groove structure on the surface of the slender cylinder. Before cutting, the slender cylindrical workpiece needs to be fixed on the fixture with a fixture. Currently used fixtures, in order to avoid interference between the milling cutter and the workpiece fixture, there are two ways of clamping, one is to fix the two ends of the workpiece, and the other is to fix the middle of the workpiece; Due to the relatively low rigidity of the slender workpiece when the milling cutter mills the surface of the workpiece, when the tool applies a large processing force to the workpiece surface, the workpiece will vibrate or even bend and deform, which seriously affects the processing. accuracy and the yield of the workpiece; while using the processing method of clamping the middle of the workpiece, the clamping block will interfere with the movement of the tool. Although it can reduce the vibration and bending deformation of the workpiece, it still cannot meet the requirements, and At least two times of clamping are required to complete the processing of the workpiece; since only one workpiece can be clamped and processed at a time, the production efficiency is very low.

Utility model content

In view of the deficiencies in the prior art, the purpose of this utility model is to provide a slender cylindrical workpiece processing fixture, which can effectively prevent the vibration or bending deformation of the workpiece when processing the cylindrical workpiece, and improve the precision and production efficiency of workpiece processing .

In order to achieve the above object, the utility model adopts the following technical solutions:

A processing fixture for a slender cylindrical workpiece includes a fixture base, a pressure block, and a locking piece. The fixture base is provided with two recesses for respectively accommodating a slender cylindrical workpiece. The two recesses are parallel to each other and staggered from each other. The side faces away from each other form a first limiting surface, and the bottom surface of the concave position forms a second limiting surface; the two sides of the pressing block respectively form a pressing inclined surface for pressing the elongated cylindrical workpiece in the two concave positions, The pressing inclined surface gradually inclines toward the middle part of the pressing block from top to bottom, and the locking piece is used to fix the pressing block on the clamp base.

The part of the fixture base between the two recesses is provided with a groove capable of at least accommodating the lower part of the pressing block.

The locking piece is a locking bolt that passes through the pressure block and is fixed on the fixture base through threads.

A threaded insert is detachably installed on the clamp base, and the locking bolt is threaded into the threaded insert.

The angle between the first limiting surface and the second limiting surface is 90 degrees.

The two pressing slopes are symmetrically arranged on both sides of the pressing block, and the angle between the two pressing slopes is 30 degrees.

The end surface of the concave position is also provided with a positioning stop pin which stops at one end of the elongated cylindrical workpiece.

The beneficial effects of the utility model are:

Compared with the prior art, the utility model adopts the pressing block to exert an inclined force on the side of the slender cylindrical workpiece to press the slender cylindrical workpiece in the concave position, therefore, the upper part of the slender cylindrical workpiece can be exposed to the pressure. The upper surface of the block and the fixture base is about to expose the processed part of the slender cylindrical workpiece, so that the fixture will not interfere with the movement of the tool, and the pressure blocks are set at different axial positions of the slender cylindrical workpiece, which can effectively prevent the slender The cylindrical workpiece moves, vibrates and deforms during processing. The utility model adopts the way of clamping the workpieces in pairs and setting them in groups, so that multiple workpieces can be processed in one clamping, and the production efficiency is improved several times.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the top view of Fig. 1;

Among them: 10. Fixture base; 11. Concave position; 111. First limit surface; 112. Second limit surface; 113. Positioning pin; 12. Groove; 13. Thread nesting; 20. Press block; 21. Top pressure slope; 30. Locking bolt; 40. Slender cylindrical workpiece.

Detailed ways

Below, in conjunction with accompanying drawing and specific embodiment, the utility model is described further:

As shown in Figures 1 and 2, it is a slender cylindrical workpiece processing fixture of the present invention, which is suitable for machining such as grinding and milling, and includes a fixture base 10, a pressure block 20 and a locking bolt 30, wherein , the fixture base 10 is provided with two recesses 11 respectively used to limit the movement of the slender cylindrical workpiece, the two recesses 11 are parallel to each other and have the same depth, and at the same time, the two recesses 11 are separated by a certain distance and distributed on the same horizontal plane; The side surface of the recess 11 forms a first limit surface 111, and the bottom surface of the recess 11 forms a second limit surface 112. The first limit surface 111 and the second limit surface 112 together form a 90-degree V-shaped surface. The elongated cylindrical workpiece 40 is placed behind the recess 11 , and the 90-degree V-shaped surface defines four degrees of freedom of the elongated cylindrical workpiece 40 . The first limiting surface 111 and the second limiting surface 112 can be in a mutually perpendicular relationship as shown in FIG. The size and angle combination, as shown in Figure 1, on the opposite side of the two recesses 11, only need to ensure that the parts to be processed of the two elongated cylindrical workpieces 40 respectively located in the recesses 11 are exposed. The two sides of the pressing block 20 respectively form a pressing inclined surface 21 for pressing the elongated cylindrical workpiece 40 in the two recesses 11, that is, the two pressing inclined surfaces 21 are respectively used for pressing the exposed surface of the above-mentioned elongated cylindrical workpiece 40 , the two pressing slopes 21 gradually incline toward the middle part of the pressing block 20 from top to bottom, and the pressing slopes 21 are tangent to the circumferential surface of the elongated cylindrical workpiece 40 when pressing against the surface of the elongated cylindrical workpiece 40, that is, the lower When pressing the block 20, the direction of the pressure applied by the top pressure slope 21 to the circumferential surface of the corresponding elongated cylindrical workpiece 40 is perpendicular to the top pressure slope 21 and the center of circle of the elongated cylindrical workpiece 40, that is to say, the top pressure slope 21 applies The force on the slender cylindrical workpiece 40 will form two component forces that are horizontally outward and vertically downward, so that the slender cylindrical workpiece 40 is clamped on the pressing inclined surface 21, the first limiting surface 111 and the second The area surrounded by the limiting surface 112 is fixed in the recess 11 . The above-mentioned locking bolt 30 is threaded through the pressing block 20 from top to bottom, and the part of the locking bolt 30 passing through the lower surface of the pressing block 20 is fixed on the clamp base 10 in a threaded manner, and the locking bolt 30 is tightened, that is, Pressing force may be provided to the pressing block 20 and fix the pressing block 20 . Of course, the locking bolt 30 can also be replaced by other locking elements, as long as it can provide a pressing force and fix the pressing block 20 on the fixture base 10 .

A groove 12 is formed on the part between the two recesses 11 on the clamp base 10, and the groove 12 is used for inserting the lower part of the pressure block 20, that is, the groove 12 can at least accommodate the lower part of the pressure block 20, so as to avoid The pressing block 20, in this way, the pressing block 20 can be increased in thickness according to the strength requirement, so as to increase the strength, so as not to deform when pressing the elongated cylindrical workpiece 40 .

In order to improve the service life of the clamp base 10, a detachable threaded insert 13 is provided on the above-mentioned clamp base 10. The threaded insert 13 is specifically located in the middle of the bottom of the groove 12, and the locking bolt 30 is connected to the threaded insert. 13 and locked with the threaded insert 13, after a long time of use, the threaded insert 13 can not meet the locking requirements due to wear and tear, and a new threaded insert 13 can be replaced.

The above two pressing slopes 21 are symmetrically arranged on both sides of the pressing block 20, and the angle between the two pressing slopes 21 is 30 degrees, that is, the angle between the pressing slopes 21 and the vertical direction is 15 degrees.

A positioning pin 113 for restricting the axial movement of the elongated cylindrical workpiece is also provided on the end surface of the above-mentioned recess 11, and is used for limiting the axial position of the elongated cylindrical workpiece 40 during clamping.

When the utility model is in use, since the pressure block 20 is used to exert an inclined force on the side of the elongated cylindrical workpiece 40 to compress the elongated cylindrical workpiece 40 in the concave position 11, the upper part of the elongated cylindrical workpiece 40 can be exposed On the upper surface of the pressing block 20 and the clamp base 10, the part to be processed of the slender cylindrical workpiece 40 is exposed, so that the clamp will not interfere with the movement of the tool, and the pressing blocks are respectively arranged at different axial positions of the slender cylindrical workpiece 40 20. It can effectively prevent the movement, vibration and deformation of the slender cylindrical workpiece during processing.

As shown in Fig. 2 again, the utility model is provided with four recesses 11 for accommodating the slender cylindrical workpiece 40 on the clamp base 10, and every two recesses 11 are arranged oppositely, thereby realizing the paired clamping of the workpiece Arranged tightly and in groups; four elongated cylindrical workpieces 40 can be processed at one time in production.

Those skilled in the art can make other corresponding changes and deformations according to the above-described technical solutions and ideas, and all these changes and deformations should fall within the protection scope of the claims of the present invention.

Claims (7)

1. elongate cylinder workpiece clamp for machining, it is characterized in that, comprise clip base, briquetting and locking member, in clip base, be provided with two recess that are respectively used to hold elongate cylinder workpiece, this two recess is parallel to each other and mutually stagger, and the bottom surface that two recess side away from each other forms one first confined planes, recess forms the second confined planes; The both sides of briquetting form respectively one for pushing up the pressure inclined-plane, top of the elongate cylinder workpiece of pressing two recess, and this pressure inclined-plane, top from top to bottom tilts towards the pars intermedia of briquetting gradually, and locking member is for being fixed on clip base by briquetting.

2. elongate cylinder workpiece clamp for machining as claimed in claim 1, is characterized in that, the part in clip base between two recess is provided with one at least can hold the groove of briquetting bottom.

3. elongate cylinder workpiece clamp for machining as claimed in claim 1, is characterized in that, locking member is one to be connected on briquetting and by screw thread and to be fixed on the clamping screw in clip base.

4. elongate cylinder workpiece clamp for machining as claimed in claim 3, is characterized in that, dismountable in clip base that a screw thread is installed is nested, clamping screw be threadedly connected to screw thread nested in.

5. elongate cylinder workpiece clamp for machining as claimed in claim 1, is characterized in that, the angle of the first confined planes and the second confined planes is 90 degree.

6. elongate cylinder workpiece clamp for machining as claimed in claim 1, is characterized in that, the both sides that are arranged at briquetting of inclined-plane symmetry are pressed on two tops, and the angle on two pressure inclined-planes, top is 30 degree.

7. elongate cylinder workpiece clamp for machining as claimed in claim 1, is characterized in that, the end face of recess is also provided with a backstop in the location backing pin of elongate cylinder workpiece one end.