CN106583534A

CN106583534A - CNC cutting tool and CNC machining method

Info

Publication number: CN106583534A
Application number: CN201611195943.XA
Authority: CN
Inventors: 张锐
Original assignee: Guangdong Evenwin Precision Technology Co Ltd
Current assignee: Guangdong Evenwin Precision Technology Co Ltd
Priority date: 2016-12-22
Filing date: 2016-12-22
Publication date: 2017-04-26

Abstract

The invention discloses a CNC cutting tool. The CNC cutting tool comprises an integrated body and a cutting edge. One end of the body is the fixing end of the cutting tool, and the other end of the body is the cutting end; and the outer contour of the cutting end is the same with the contour of a to-be-machined aperture, the cutting edge is the last edge of the cutting end, and the end face of the cutting end is an internal concave hook face. According to the CNC cutting tool, the invention further provides a CNC machining method. The CNC machining method comprises the following steps that (1), through a common drill or a milling cutter, a to-be-machined part is subjected to rough treatment; (2), main shaft rotation is stopped, the CNC cutting tool is switched, and the orientation of the CNC cutting tool is positioned; (3), the cutting tool falls quickly to conduct punching; and (4), the cutting tool is raised up, and machining is finished. According to the CNC cutting tool and CNC machining method, tool breaking is not prone to happening, so that a defective product owing to tool breaking is not produced, the machining speed is quick, and the service life of the cutting tool is long.

Description

A kind of CNC cutters and CNC processing methods

Technical field

The present invention relates to the CNC process tools of field of machining, more particularly to small size R angle and right angle and CNC processing Method.

Background technology

The processing of common hole class formation, due to being the tool sharpening using at a high speed rotation, typically cannot process as The wedge angle pore structure of square opening shown in Fig. 1, due to breaking and the problem of working (machining) efficiency, it is also difficult to process as shown in Figures 2 and 3 Small size R corner apertures（Refer generally to R≤0.3mm）.

The content of the invention

The main object of the present invention is to propose a kind of CNC cutters and CNC processing methods, it is intended to solve to carry small size R angle Product aperture processing.

For achieving the above object, the present invention proposes a kind of CNC cutters, and it includes integrally formed body and cutting edge, institute The fixing end that body one end is cutter is stated, the other end is the cutting end of cutter；The outline of the cutting end and hole to be processed Footpath profile is identical, and the cutting edge is the seamed edge of the cutting end, and the end face of the cutting end is inner sunken face.

Preferably, the body is quadrangular, and the cutting edge is four curves of cutting end.

Preferably, the scope for going straight up to side and the angle a of the inscribed circle arc tangent line of the cutting edge of the body be 60 °≤ a≤70°。

Preferably, the side of going straight up to of the body is 66 ° with the angle a of the inscribed circle arc tangent line of the cutting edge.

Preferably, the cross section of the body is surrounded by regular polygon and circular arc, and the center of circle of the circular arc is regular polygon Summit.

Preferably, the cutting edge is in Hardmetal materials, high-speed steel, carbon tool steel, diamond or carborundum It is a kind of.

According to aforesaid CNC cutters, the present invention also proposes a kind of CNC processing methods, and it comprises the steps：

Step one：Bulk processing is opened to parts to be processed using normal drill bit or milling cutter；

Step 2：After the completion of opening bulk processing, the CNC cutters are changed to, and position CNC tool orientations；

Step 3：Cutter hurtles down, and completes puncture motion；

Step 4：Cutter is lifted, and completes processing.

Preferably, the scope of the thickness H of the parts to be processed be 1mm-10mm, the maximum dimension D of the cutting edge with The relation of thickness H is 2D<H.

Preferably, the cutter falling speed in the step 3 is 10000mm/min-48000mm/min.

The CNC cutters and CNC processing methods of the present invention is difficult breaking, therefore also will not cause defective products because of breaking, and Completed by roughing and the step of punching two, process velocity is fast, cutting edge is in inner sunken face, cutter life is long.

Description of the drawings

Fig. 1 is the square opening schematic diagram in existing product；

Fig. 2 is the small size R corner structure schematic diagram in existing product；

Fig. 3 is another kind of small size R corner structure schematic diagram in existing product；

Fig. 4 is the cutter structure schematic diagram of the preferred embodiment of the present invention；

Fig. 5 is the cutter structure schematic diagram of another kind preferred embodiment of the invention；

Fig. 6 is the course of processing schematic diagram of CNC processing methods of the present invention；

Fig. 7 is the side view of the CNC tool sharpening products of the present invention.

Specific embodiment

Below in conjunction with accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that institute The embodiment of description a part of embodiment only of the invention, rather than the embodiment of whole.Based on the enforcement in the present invention Example, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made is belonged to The scope of protection of the invention.

If it is to be appreciated that directivity instruction is related in the embodiment of the present invention（Such as up, down, left, right, before and after ...）, Then directionality indicates to be only used for explaining in a certain particular pose（As shown in drawings）Under relative position relation between each part, Motion conditions etc., if the particular pose changes, directionality indicates also correspondingly to change therewith.

As Figure 4-Figure 6, CNC cutters of the invention include integrally formed body 2 and cutting edge 1, the body 2 one The fixing end for cutter is held, the other end is the cutting end of cutter；The outline of the cutting end and aperture outline phase to be processed Together, the cutting edge 1 is the seamed edge of the cutting end, and the end face of the cutting end is inner sunken face, makes the more cutting edge of a knife or a sword of cutting edge 1 Profit.

When using, this cutter adopts the CNC processing methods of following steps：

Step one：Bulk processing is opened parts to be processed using normal drill bit or milling cutter, initial processing goes out aperture to be processed substantially Profile；

Step 3：Cutter hurtles down, and completes puncture motion（Down arrow direction in Fig. 6 c）, the aperture size for making processing is Default size；

Step 4：Cutter is lifted（The direction of arrow upwards in Fig. 6 d）, complete processing.

The cutter and method of the present invention is applied to the special-shaped through hole of punching, or abnormally-structured has the blind of a segment distance with bottom Hole.Hardness, drawing velocity and Product Precision by stamping material is limited, the cutter and method punching using the present invention When, no more than 30mm, the cutter falling speed in step 3 should be greater than 10000mm/min to the thickness H of parts to be processed, most preferably Scope is 10000mm/min-48000mm/min.To ensure machining accuracy and tool life, thickness H should be maintained at Between 1mm-20mm, and the maximum dimension D of the cutting edge 1 should meet 2D with the thickness H of parts to be processed<The relation of H.

The cutter of the present invention is compared with universal cutter, and the cutting edge portion of only cutting edge 1 is different.Due to the outline of cutting end It is identical with aperture outline to be processed, therefore can be with one-shot forming；The end face of cutting end is inner sunken face, and raised edge is sword Mouthful.The factors such as the degree of crook of its curved surface and aperture size to be processed, material hardness to be processed, the hardness of cutter are related. In general, the hardness of processed product is harder, and the inner sunken face degree of crook of cutting end end face is less, to increase the strong of cutting edge Degree.

As shown in fig. 7, the degree of crook of cutting edge curved surface can be by the cutting edge inscribed circle arc for going straight up to side and cutting edge 1 of body 2 The angle a of tangent line draws；The size of angle a affects the sharp keen firmness of blade, before its selection principle and tradition CNC cutters Angle selection principle is identical, for example：

1st, the strength of materials of workpiece to be processed, hardness are high, and angle a should be larger；

2nd, during working plastic material, angle a should be smaller；During processing fragile material, angle a should be larger；

3rd, when cutter material is high-speed steel, bending strength, toughness are good, and angle a can be smaller；Carbide tool it is anti- Curved intensity and toughness are weaker, then angle a should be larger；

4th, when lathe rigidity, underpower, angle a should be smaller, it is possible to decrease the cutting force in the course of processing, to mitigate vibration.

The preferred embodiments of the present invention use high-speed steel tool, and Material Processing is AL7075 aluminium alloys, and angle a can be with Take 66 °.

The process of the cutter fixed form, feeding feeding manner and waste material in the present invention can adopt traditional CNC to process Processing mode, will not be described here.

As shown in figure 4, the cross section of the body 2 is surrounded by regular polygon and circular arc, the center of circle of the circular arc is just many The summit of side shape, can process the little R corner apertures of Fig. 3.As shown in figure 4, described circular arc is outside from the summit of regular polygon That part of protrusion；It is of course also possible to be that a part of circular arc concaved from apex（Justify with the outline in Fig. 4 Arc encloses conglobate that part）, then another kind of profiled holes can be processed.As shown in figure 5, the body 2 of the preferred embodiment is Quadrangular, the cutting edge 1 for cutting end four curves, can time processing go out right angle aperture as shown in Figure 1.Also dependent on Situation is designed as the variously-shaped of needs, and this is no longer going to repeat them.

Cutter material in the present invention, that is, cut Hardmetal materials, high-speed steel, carbon, C that edge material can be commonly used One kind in steel, diamond or carborundum.

To ensure the processing effect of the present invention, the cutter and processing mode of the present invention are applied to relatively thin product, especially Cellphone Accessories class product, its product aperture is little, and thickness is not high, and universal cutter is difficult to again.

The preferred embodiments of the present invention are the foregoing is only, the scope of the claims of the present invention is not thereby limited, it is every at this Under the inventive concept of invention, the equivalent structure transformation made using description of the invention and accompanying drawing content, or directly/use indirectly It is included in the scope of patent protection of the present invention in other related technical fields.

Claims

1. a kind of CNC cutters, it is characterised in that：It includes integrally formed body and cutting edge, and described body one end is cutter Fixing end, the other end for cutter cutting end；The outline of the cutting end is identical with aperture outline to be processed, described to cut The seamed edge that sword is the cutting end is cut, and the end face of the cutting end is inner sunken face.

2. CNC cutters as claimed in claim 1, it is characterised in that：The body is quadrangular, and the cutting edge is cutting end Four curves.

3. CNC cutters as claimed in claim 2, it is characterised in that：Going straight up in side and the cutting edge for the body connects The scope of the angle a of circular arc tangential line is 60 °≤a≤70 °.

4. CNC cutters as claimed in claim 3, it is characterised in that：Going straight up in side and the cutting edge for the body connects The angle a of circular arc tangential line is 66 °.

5. CNC cutters as claimed in claim 1, it is characterised in that：Enclosed by regular polygon and circular arc the cross section of the body Into the center of circle of the circular arc is the summit of regular polygon.

6. CNC cutters as claimed in claim 1, it is characterised in that：The cutting edge is Hardmetal materials, high-speed steel, carbon One kind in plain tool steel, diamond or carborundum.

7. a kind of CNC processing methods of employing claim 1-6 any one CNC cutter, it is characterised in that：It includes following step Suddenly：

Step 3：Cutter hurtles down, and completes puncture motion；

Step 4：Cutter is lifted, and completes processing.

8. CNC processing methods as claimed in claim 7, it is characterised in that：The scope of the thickness H of the parts to be processed is 1mm-10mm, the maximum dimension D of the cutting edge is 2D with the relation of thickness H<H.

9. CNC processing methods as claimed in claim 7, it is characterised in that：Cutter falling speed in the step 3 is 10000mm/min-48000mm/min。