CN212042699U

CN212042699U - Arc turning tool for processing optical mold

Info

Publication number: CN212042699U
Application number: CN201922290516.5U
Authority: CN
Inventors: 陈朋跃; 沈巳暐
Original assignee: Shenzhen Xin Jinquan Diamond Cutting Tool Co ltd
Current assignee: Shenzhen Xinjinquan Precision Technology Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-12-01
Anticipated expiration: 2029-12-19

Abstract

The utility model relates to the technical field of cutting tool, especially a circular arc lathe tool for optical mold processing, be in including cutter body and setting the tool bit of cutter body one end, the tool bit is triangle-shaped, knife face intersects in the tool bit top formation back knife face behind two sides of tool bit, back knife face is the toper arc surface, the circular arc radius precision of back knife face is 0.001mm, and the circular arc profile degree is less than 40 nm. The utility model discloses an improve the circular arc radial precision of back knife face to within +/-0.001 mm to process the circular arc profile degree to 40nm, make the optical mold mirror surface effect of processing out better, the precision is higher.

Description

Arc turning tool for processing optical mold

Technical Field

The utility model relates to a cutter technical field, especially a circular arc lathe tool for optical mold processing.

Background

The optical mold is a fixture for injection molding of optical products, and the requirement on the surface smoothness of the optical mold is high for forming optical products with good quality. However, in the prior art, the optical mold is generally machined by using the circular arc lathe tool which is commonly used for machining the optical mold, but the circular arc R value of the circular arc lathe tool which is commonly used for machining the optical mold is poor in precision, so that the precision of the machined mold is not high. Through the optical die of the circular arc lathe tool processing that is commonly used for optical die processing, with the observation of microscope magnification 500 times, there is slight vestige on the surface, and the surface of mould does not reach better mirror surface effect.

SUMMERY OF THE UTILITY MODEL

The utility model provides a circular arc lathe tool for optical mold processing aims at solving the circular arc lathe tool circular arc precision that is used for optical mold processing and hangs down, the optical mold mirror surface effect poor problem of processing out.

The utility model provides a technical scheme that its technical problem adopted is: including the cutter body and setting be in the tool bit of cutter body one end, the tool bit is triangle-shaped, two side back knife faces of tool bit intersect and form the back knife face on the tool bit top, the back knife face is the toper arc surface, the circular arc radius precision of back knife face is 0.001mm, and the circular arc profile degree is less than 40 nm.

Further, the rake face of the tool bit is inclined downwards from the vertex to form a rake angle with the base surface of the tool body, and the rake angle is 0 degree; the front tool face inclines downwards from the front edge of the tool bit to the welding surface of the tool bit and forms a back angle with the cutting surface of the tool, and the angle of the back angle is 7-25 degrees.

Furthermore, the arc radius of the front edge of the cutter head is 0.003-0.1 mm.

Further, the front edge arc profile degree of the tool bit is 10-40 nm.

Furthermore, the circular arc radius of the back edge of the cutter head is 0.003-0.1 mm.

Further, the circular arc profile degree of the rear edge of the tool bit is 10-40 nm.

Further, the roughness of the rake face and the flank face is less than 0.002 μm.

Further, the tool bit is a diamond.

Further, the rake face 111 crystal face and the flank face are the diamond 100 crystal face.

Further, the cutter body is made of tungsten steel.

Have fine trace for the optical mold surface that ordinary circular arc lathe tool processed out among the prior art, the mirror surface effect is relatively poor, has consequently provided an circular arc lathe tool for optical mold processing, the tool bit is triangle-shaped, two side flank of tool bit intersect and form the back knife face in the tool bit top, the back knife face is the toper arc surface, the circular arc radius precision of back knife face is 0.001mm, and the circular arc profile degree is less than 40 nm. And the utility model discloses an improve the circular arc radial precision of back knife face to within +/-0.001 mm to process the circular arc profile degree to 40nm, make the optical mold mirror surface effect of processing out better, the precision is higher.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic structural diagram of a circular arc lathe tool for processing an optical mold according to the present invention;

FIG. 2 is an enlarged schematic view of part A of FIG. 1;

fig. 3 is a schematic front projection view of the turning tool for machining optical molds according to the present invention;

FIG. 4 is an enlarged view of part B of FIG. 2;

fig. 5 is another schematic orthographic projection view of the turning tool for machining the optical mold according to the present invention;

FIG. 6 is an enlarged partial view of portion C of FIG. 3;

10. a cutter body; 11. a base surface; 20. a cutter head; 21. a flank face; 22. a side flank relief surface; 23. a rake face; 24. welding a surface; 25. a front edge; 26. a rear edge; r1, nose edge arc radius; r2, trailing edge arc radius, β, relief angle.

Detailed Description

The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in fig. 1-6, the utility model provides an arc lathe tool for optical mold processing, be in including cutter body 10 and setting the tool bit 20 of cutter body 10 one end, the tool bit is triangle-shaped, two side back knife faces of tool bit intersect and form the back knife face on the tool bit top, the back knife face is the toper arc surface, the circular arc radius precision of back knife face is 0.001mm, and the circular arc profile degree is less than 40 nm. The arc radius precision of the rear tool face of the arc turning tool is improved, and the arc profile degree is within 40nm, so that the mirror surface effect of the processed optical mold is good, and the precision is high. The contour degree refers to the variation of the measured actual contour relative to the ideal contour, and the concept is used for describing the accuracy of the curved surface or the curve shape.

The rake surface 23 of the tool tip 20 is inclined downward from the apex to form a rake angle with the base surface 11 of the tool body 10, and the rake angle is 0 °; the size of the rake angle affects the sharpness and firmness of the cutting edge, and determines the cutting performance of the tool. The rake angle of the cutter is reasonably increased, the plastic deformation of a cutting layer can be reduced, and the friction resistance when chips flow is reduced; the sharpness of the cutting edge is improved, so that the cutting force, the cutting heat and the cutting power are reduced, the milling precision and the quality of a processed surface are improved, and the durability of the cutter is improved. Theoretically, if the rake angle is positive, i.e., greater than 0 °, the edge strength will be weakened, and if it is negative, i.e., less than 0 °, the edge cutting force will be reduced, so the median value of 0 ° is selected to both ensure the edge strength and stabilize the edge cutting force. The rake surface 23 is inclined downward from the front edge 25 of the tool bit to the welding surface 24 of the tool bit 20 to form a clearance angle with the cutting surface of the tool, and the clearance angle is 7-25 degrees. The tool relief angle is primarily to reduce friction between the cutting edge and the tool flank 21, and the workpiece machining surface. The relief angle is too large, which weakens the strength of the cutting edge and the blade portion, reduces the durability of the tool, and causes chipping, but since the relief angle is larger, the cutting force is larger, the heat generated during cutting is smaller, and the heat dissipation effect is better. The selected back angle is 7 degrees to 25 degrees, the friction between the cutting edge and the rear tool face 21 of the cutter and the workpiece processing surface is not too large, the strength and the heat dissipation condition of the cutting edge and the cutting edge are excellent, the durability of the cutter is enhanced, and the cutter is not easy to break.

Wherein, the radius of the arc of the front edge 25 of the cutter head 20 is 0.003-0.1mm, and the profile of the arc of the front edge 25 of the cutter head 20 is 10-40 nm; the radius of the arc of the back edge 26 of the cutter head 20 is 0.003-0.1mm, and the profile of the arc of the back edge 26 of the cutter head 20 is 10-40 nm. The rear edge 26 of the arc turning tool is cylindrical, so that the subsequent grinding of the tool is convenient, the arc is not required to be reground, and only the surface is reduced for grinding.

Furthermore, the roughness of the front rake face 23 and the back rake face 21 is less than 0.002 μm, so that the mirror surface effect of the processed optical die is good.

Further, since the cutting tip 20 is made of diamond, the 111 crystal plane of diamond is the hardest and most wear-resistant plane of diamond, the 100 crystal plane is the second order of diamond, and both have polished characteristics, the 111 crystal plane and the 100 crystal plane of diamond are selected from the rake face 23 and the flank face 21.

Further, the cutter body 10 is made of tungsten steel, and the tungsten steel material is selected as the cutter base body, because the tungsten steel has the characteristics of high hardness, good rigidity and high strength, and is not easy to deform.

It should be understood that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some technical features; and all such modifications and alterations should fall within the scope of the appended claims.

Claims

1. The arc turning tool for processing the optical die is characterized by comprising a tool body and a tool bit arranged at one end of the tool body, wherein the tool bit is triangular, two side rear tool faces of the tool bit are intersected at the top end of the tool bit to form a rear tool face, the rear tool face is a conical arc surface, the arc radius precision of the rear tool face is +/-0.001 mm, and the arc profile degree is less than 40 nm;

the rake face of the cutter head is inclined downwards from the top to form a rake angle with the base surface of the cutter body, and the rake angle is 0 degree; the front tool face inclines downwards from the front edge of the tool bit to the welding surface of the tool bit and forms a back angle with the cutting surface of the tool, and the angle of the back angle is 7-25 degrees.

2. The turning tool for optical mold machining according to claim 1, wherein the radius of the front edge of the tool bit is 0.003-0.1 mm.

3. The turning tool for optical mold machining according to claim 1, wherein the front edge of the tool bit has a radius profile of 10-40 nm.

4. The turning tool for optical mold machining according to claim 1, wherein the radius of the back edge of the tool bit is 0.003-0.1 mm.

5. The turning tool for optical mold machining according to claim 1, wherein the back edge of the tool bit has a radius profile of 10-40 nm.

6. The turning tool for optical mold machining according to claim 1, wherein the roughness of the rake face and the flank face is less than 0.002 μm.

7. The turning tool for optical mold machining according to claim 1, wherein the tool bit is diamond.

8. The turning tool for optical mold machining according to claim 2, wherein the rake face 111 and the flank face are diamond 100 crystal faces.

9. The turning tool for the optical mold machining according to any one of claims 1 to 3, wherein the tool body is made of tungsten steel.