CN109877366B

CN109877366B - Composite cutter

Info

Publication number: CN109877366B
Application number: CN201910163578.1A
Authority: CN
Inventors: 江炳宏; 苏业健; 陈小全
Original assignee: Guangdong Evenwin Precision Technology Co Ltd; Shenzhen Everwin Precision Technology Co Ltd
Current assignee: Guangdong Evenwin Precision Technology Co Ltd; Shenzhen Everwin Precision Technology Co Ltd
Priority date: 2019-03-05
Filing date: 2019-03-05
Publication date: 2020-09-08
Anticipated expiration: 2039-03-05
Also published as: CN109877366A

Abstract

The invention relates to a composite tool, comprising: a knife handle; one end of the milling groove part is connected with one end of the cutter handle, and the milling groove part is used for milling a groove in a workpiece; one end of the connecting part is connected with one end of the milling groove part, which is far away from the cutter handle; one end of the chamfering part is connected with one end, far away from the milling groove part, of the connecting part, and the chamfering part is used for chamfering a workpiece; and one end of the drilling part is connected with one end of the chamfering part, which is far away from the connecting part, and the other end of the drilling part can drill a workpiece. The composite cutter has multiple processing functions, can process different structures of products, reduces the number of cutters, improves the processing efficiency and reduces the use cost of the cutters.

Description

Composite cutter

Technical Field

The invention relates to the technical field of machining, in particular to a composite cutter.

Background

In the field of 3C electronic products today, products are continuously innovated, so that the product structure is more and more complex. For the processing of products, in order to ensure the dimensional accuracy and processing stability of the products, different types of structures are processed in one process, and more processing steps exist.

As more and more structures to be machined in a single process are needed, more machining tools need to be equipped, and the number of tools stored in a tool magazine of the existing machine tool is limited, so that frequent tool mounting and tool changing are needed when a workpiece is machined, the machining efficiency is low, the use cost of the tools is high, and the requirement for quick machining cannot be met.

Disclosure of Invention

Therefore, the composite cutter which can process different structures of products, has higher processing efficiency and lower use cost is needed to solve the problems of low processing efficiency and high use cost of cutters when the products with different structures are processed.

A composite cutting tool, comprising:

a knife handle;

one end of the milling groove part is connected with one end of the cutter handle, and the milling groove part is used for milling a groove in a workpiece;

one end of the connecting part is connected with one end of the milling groove part, which is far away from the cutter handle;

one end of the chamfering part is connected with one end, far away from the milling groove part, of the connecting part, and the chamfering part is used for chamfering a workpiece; and

and one end of the drilling part is connected with one end of the chamfering part, which is far away from the connecting part, and the other end of the drilling part can drill a workpiece.

Above-mentioned compound tool can carry out point drilling processing to the work piece through drilling portion, and chamfer portion can carry out the processing of anti-chamfer to the work piece, and milling flutes portion can carry out milling flutes processing to the work piece. The cutter can meet various processing functions, can process products with different structures, reduces the number of required cutters, reduces the time for installing and changing the cutters, improves the processing efficiency and saves the use cost of the cutter.

In one embodiment, the milling groove portion includes a first cutting member and a second cutting member, opposite ends of the first cutting member are respectively connected with one end of the tool shank and one end of the second cutting member, and the other end of the second cutting member is connected with the connecting portion. T-shaped grooves may be machined by the first cutter in cooperation with the second cutter.

In one embodiment, the first cutting element is frustoconical and includes a first end portion and a second end portion, the first end portion having a cross-sectional area smaller than a cross-sectional area of the second end portion, the first end portion being connected to the shank, the second end portion being connected to one end of the second cutting element. The structure of the first cutting piece can enable the T-shaped groove to be machined more smoothly, and the connecting position of the bottom surface and the side surface of the machined T-shaped groove is excessively better.

In one embodiment, the second cutter is cylindrical, and the cross-sectional area of the second cutter is equal to the cross-sectional area of the second end. The structural strength of the milling groove part is better, and when the milling groove part mills the groove of the workpiece, the cylindrical second cutting piece can better control the processing depth of the T-shaped groove. In one embodiment, the chamfered portion is in a circular truncated cone shape and includes a third end portion and a fourth end portion, the cross-sectional area of the third end portion is smaller than that of the fourth end portion, the third end portion is connected to an end of the connecting portion away from the milling groove portion, and the fourth end portion is connected to an end of the drilling portion. Can carry out the processing of anti-chamfer through the part between third tip and the fourth tip to the work piece, it is more convenient to process, and the processing effect is better.

In one embodiment, the connecting portion is cylindrical, and two opposite ends of the connecting portion are respectively connected with the milling groove portion and the third end portion. The structural connection of the processing part is more stable and firm.

In one embodiment, the cross-sectional area of the third end portion is equal to the cross-sectional area of the connecting portion.

In one embodiment, the drilling portion is conical, and the drilling portion includes a disc end connected to the fourth end portion and a tip end capable of drilling a workpiece. The workpiece can be directly drilled through the tip, and the portion between the disc end and the tip can be chamfered.

In one embodiment, the cross-sectional area of the disc end is equal to the cross-sectional area of the fourth end portion.

In one embodiment, the cross-sectional shape of the drilling portion is an isosceles right triangle. The drilling and chamfering effects are better.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the composite cutting tool of the present invention;

FIG. 2 is a front view of the composite cutting tool shown in FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a schematic view of the operation of the compound cutting tool shown in FIG. 1 in use to machine a workpiece.

In the drawings, the components represented by the respective reference numerals are listed below:

10. a compound cutter; 11. a knife handle; 111. transition surface; 112. a connecting rod; 12. milling a groove part; 121. a first cutting member; 1211. a first end portion; 1212. a second end portion; 122. a second cutting member; 13. a connecting portion; 14. chamfering the corner; 141. a third end portion; 142. a fourth end portion; 15. drilling a hole part; 151. a disc end; 152. a tip; 16. a reinforcing portion; 20. and (5) a workpiece.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

Referring to fig. 1 and 2, in one embodiment, a compound cutting tool 10 includes a cylindrical shank 11, a groove milling portion 12, a connecting portion 13, a chamfer portion 14, and a drilling portion 15. The compound tool 10 is connected to a drive apparatus via a shank 11, whereby the compound tool 10 is mounted to the drive apparatus. The driving apparatus may drive the compound tool 10 to move and rotate to machine the workpiece 20. The compound cutting tool 10 is arranged along the vertical direction, the top end of the tool shank 11 is connected with a driving device, and the bottom end of the tool shank 11 is sequentially connected with a milling groove part 12, a connecting part 13, a chamfering part 14 and a drilling part 15. Referring to fig. 4, the workpiece 20 may be point-drilled through the drilling portion 15, the chamfer portion 14 may be reverse-chamfered, and the milling groove portion 12 may be milling groove of the workpiece 20. Further, the positions of the milling groove portion 12, the chamfer portion 14, and the drilling portion 15 ensure that the spot drilling, chamfering, and milling can be performed in order or individually without interference. One cutter can meet various processing functions, the workpieces 20 can be processed in different structures, the number of required cutters is reduced, the time for installing and changing the cutters is shortened, the processing efficiency is improved, and the use cost of the cutter is saved.

Referring to fig. 3, in an embodiment, the groove milling portion 12 includes a first cutting member 121 and a second cutting member 122. The top end of the first cutting member 121 is connected to the bottom end of the tool shank 11, the bottom end of the first cutting member 121 is connected to the top end of the second cutting member 122, and the bottom end of the second cutting member 122 is connected to the connecting portion 13. T-shaped grooves may be machined by the first cutter 121 in cooperation with the second cutter 122.

When a T-shaped groove with a front surface is machined in the workpiece 20, the bottom surface of the T-shaped groove can be machined by the second cutting member 122, and the side surface of the T-shaped groove can be machined by the first cutting member 121; when a reverse T-shaped groove is machined in the workpiece 20, the bottom surface of the T-shaped groove may be machined by the first cutting member 121, and the side surface of the T-shaped groove may be machined by the second cutting member 122.

Referring to fig. 3, in one embodiment, the first cutting member 121 is in the shape of a circular truncated cone and includes a first end 1211 and a second end 1212. The first end 1211 has a cross-sectional area that is less than the cross-sectional area of the second end 1212, the first end 1211 being connected to the bottom end of the shank 11, and the second end 1212 being connected to the top end of the second cutting member 122. The second cutter 122 is cylindrical and the cross-sectional area of the second cutter 122 is equal to the cross-sectional area of the second end 1212. The structure of the first cutting member 121 can make the reverse T-shaped groove more smooth, and the joint between the bottom surface and the side surface of the processed reverse T-shaped groove is excessively better. The cylindrical second cutting member 122 can enable the structural strength of the milling groove portion 12 to be better, and when the milling groove portion 12 mills the groove of the workpiece 20, the cylindrical second cutting member 122 can better control the processing depth of the reverse T-shaped groove.

It will be appreciated that the first cutter 121 may be provided in a cylindrical shape and the second cutter 122 may be provided in a truncated cone shape, including a small head end and a large head end. The top end of the first cutting member 121 is connected to the bottom end of the tool shank 11, the bottom end of the first cutting member 121 is connected to the large head end of the second cutting member 122, the small head end of the second cutting member 122 is connected to the connecting portion 13, and the cross-sectional area of the large head end of the second cutting member 122 is equal to that of the first cutting member 121. The structure of the second cutting member 122 can make the front T-shaped groove smoother, and the junction between the bottom surface and the side surface of the front T-shaped groove is excessively better. The cylindrical first cutting member 121 can enable the structural strength of the milling groove portion 12 to be better, and when the milling groove portion 12 mills the groove of the workpiece 20, the cylindrical first cutting member 121 can better control the processing depth of the front T-shaped groove.

Of course, the first cutting member 121 and the second cutting member 122 may be both configured in a circular truncated cone shape, the small end of the first cutting member 121 is connected to the bottom end of the tool holder 11, the large end of the first cutting member 121 is connected to the large end of the second cutting member 122, the small end of the second cutting member 122 is connected to the connecting portion 13, and the cross-sectional area of the large end of the first cutting member 121 is equal to that of the large end of the second cutting member 122.

Referring to fig. 3, in an embodiment, the chamfered portion 14 is in a circular truncated cone shape and includes a third end 141 and a fourth end 142. The cross-sectional area of the third end portion 141 is smaller than that of the fourth end portion 142, the third end portion 141 is connected to the bottom end of the connection portion 13, and the fourth end portion 142 is connected to the top end of the bore portion 15. The reverse chamfer processing can be performed on the workpiece 20 through the part between the third end 141 and the fourth end 142, so that the processing is more convenient and the processing effect is better. The connecting portion 13 is cylindrical, and the two opposite ends of the connecting portion 13 are connected to the bottom end of the second cutting member 122 and the third end 141, respectively, so that the structural connection of the machining portion is more stable and firm. The cross-sectional area of the third end portion 141 may be equal to that of the connecting portion 13, so that it is more convenient to reverse-chamfer the workpiece 20.

Referring to fig. 3, in another embodiment, the drilling portion 15 is conical and includes a disk end 151 and a tip 152. The disk end 151 is connected to the fourth end 142 and the tip 152 is capable of drilling the workpiece 20. The workpiece 20 can be directly drilled by the tip 152, and the portion between the disc end 151 and the tip 152 can be subjected to the front chamfer processing of the workpiece 20. The cross-sectional area of the disc end 151 may be equal to the cross-sectional area of the fourth end portion 142, and an annular reinforcing portion 16 is disposed between the disc end 151 and the fourth end portion 142, so that the connection structure of the drilling portion 15 and the chamfered portion 14 is more stable and has better strength. The diameter of the reinforcement 16 is smaller than the diameter of the milling groove 12, which ensures that the drilling and milling can be performed sequentially or separately. If the diameter of the reinforcement 16 is greater than the diameter of the milling slot 12, then at certain locations in the workpiece 20, the milling slot 12 may be blocked by the larger area of the reinforcement 16, thereby preventing the milling operation from being performed.

It should be noted that, during a specific drilling operation, after the tip 152 is pressed against the workpiece 20 and the composite cutting tool 10 is driven to rotate, the drilling portion 15 performs a feeding motion on the surface of the workpiece 20, the tapered surface of the drilling portion 15 presses the surface of the workpiece 20, the surface of the workpiece 20 is locally deformed, and thus the surface of the workpiece 20 is desquamated. The drilling portion 15 can drill a hole with a depth not exceeding the disc end 151, and a chip channel can be arranged on the conical surface of the drilling portion 15 along the circumferential direction for facilitating chip removal during drilling of the workpiece 20.

Referring to fig. 3, in the embodiment, the cross-sectional shape of the drilling portion 15 is an isosceles right triangle, the cross-sectional shape of the chamfering portion 14 is an isosceles trapezoid, and the extension lines of the two side edges of the isosceles trapezoid intersect to form an included angle of 90 °. The spot drilling, the front chamfering and the back chamfering can be guaranteed to be processed with better processing quality.

Referring to fig. 1 and 2, in order to facilitate the machining and to make the connection strength between each cutting portion and the tool shank 11 better, the bottom end of the tool shank 11 is connected to the top end of the groove milling portion 12 through a cylindrical connecting rod 112, the diameter of the connecting rod 112 is smaller than that of the tool shank 11, and a conical transition surface 111 is formed at the connection position of the tool shank 11 and the connecting rod 112 in the length direction of the tool shank 11.

The composite cutter 10 of the present invention is useful in applications such as: the total order of the project is 200 thousands, four structures are processed by the CNC machine tool in the process, 1.7 thousands of products are produced every day, and the total processing time of a single product is 10 minutes. 1. The utilization rate of the machine table is as follows: without the use of the composite cutter 10 of the present invention, CNC machining of numerically controlled machine tools would require 190 stands, each tool magazine having a tool count of 20, and one process would need to be performed by two machines. After the compound tool 10 of the invention is used, the number of tools of the tool magazine of the machine tool is 16, and only 170 machines are needed to be erected, the expenditure of 20 machines is reduced one day, the profit of one machine per hour is 20 multiplied by 30 to 600 yuan, and 20 multiplied by 600 multiplied by 365 to 43.8 ten thousand can be saved one year; 2. the cost of the cutter is as follows: 25 yuan/branch of central drill, 28 yuan/branch of chamfer cutter, 45 yuan/branch of dovetail cutter (reverse chamfer angle), 48 yuan/branch of T-shaped cutter, 65 yuan/branch of compound cutter, the life-span of the cutter is reduced by 80%, then a compound cutter can save: (25+28+45+48-65) × 80% ═ 64 membered. Per 200 million orders, the entire project can be saved: 85.3 ten thousand; 3. the processing qualification rate of the product and the dimensional stability of the product are improved by 5 percent.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A composite cutting tool, comprising:

a knife handle;

the milling groove part is connected with one end of the cutter handle, and is used for milling a groove on a workpiece, the milling groove part comprises a first cutting piece and a second cutting piece which are arranged along the axial direction of the cutter handle, the first cutting piece is in a circular truncated cone shape, and the second cutting piece is in a cylindrical shape;

one end of the drilling part is connected with one end of the chamfering part far away from the connecting part, and the other end of the drilling part can drill a hole in a workpiece;

the milling groove part, the connecting part, the chamfering part and the drilling part are sequentially arranged along the axial direction of the cutter handle.

2. The compound tool as in claim 1, wherein opposite ends of the first cutting member are connected to one end of the shank and one end of the second cutting member, respectively, and the other end of the second cutting member is connected to the connecting portion.

3. The compound tool as defined in claim 2, wherein the first cutting member includes a first end portion and a second end portion, the first end portion having a smaller cross-sectional area than the second end portion, the first end portion being connected to the shank, the second end portion being connected to one end of the second cutting member.

4. The composite tool of claim 3, wherein the cross-sectional area of the second cutting element is equal to the cross-sectional area of the second end portion.

5. The compound tool as claimed in claim 1, wherein the chamfered portion is frustoconical and includes a third end portion and a fourth end portion, the third end portion having a smaller cross-sectional area than the fourth end portion, the third end portion being connected to an end of the connecting portion remote from the milling flute portion, and the fourth end portion being connected to an end of the drilling portion.

6. The composite cutter according to claim 5, wherein the connecting portion is cylindrical, and opposite ends of the connecting portion are connected to the milled groove portion and the third end portion, respectively.

7. The compound tool as in claim 6, wherein the cross-sectional area of the third end portion is equal to the cross-sectional area of the connecting portion.

8. The composite tool of claim 5 wherein the bore portion is conical in shape, the bore portion including a disc end and a tip end, the disc end being connected to the fourth end portion, the tip end being capable of drilling a workpiece.

9. The compound tool as in claim 8, wherein the cross-sectional area of the disc end is equal to the cross-sectional area of the fourth end portion.

10. The composite tool as set forth in claim 8, wherein the cross-sectional shape of the bore portion is an isosceles right triangle.