CN203636081U

CN203636081U - Broach

Info

Publication number: CN203636081U
Application number: CN201320882974.8U
Authority: CN
Inventors: 郭峰
Original assignee: Shaanxi Institute of Technology
Current assignee: Shaanxi Institute of Technology
Priority date: 2013-12-30
Filing date: 2013-12-30
Publication date: 2014-06-11
Anticipated expiration: 2023-12-30

Abstract

The utility model relates to the technical field of tools and discloses a broach. The broach comprises a broach body. A plurality of broach teeth are arranged on the broach body. A scrap containing groove is formed between every two adjacent broach teeth. A main cutting edge of each broach tooth is in a concave shape in the broaching direction. Each main cutting edge is in an arc shape or a V shape. The main cutting edges are symmetrically arranged along the symmetrical plane of the broach body. By the adoption of the broach, on the premise that the service life of the broach is long, the cutting force is reduced, the quality of a machined part is guaranteed, cuttings are made far away from the machining surface, and therefore the high-precision part is obtained through machining.

Description

A kind of broaching tool

Technical field

The utility model relates to cutting-tool engineering field, particularly relates to a kind of broaching tool.

Background technology

Straight-tooth broaching tool is in the time of cutting, and because blade direction is vertical with cutting direction, therefore cutting force is very large, and working angles is unstable, and part crudy is not high; Although helical teeth broaching tool belongs to inclined cutting, on cutting edge, be subject to making a concerted effort of normal direction cutting force, force broaching tool in broaching direction towards the direction identical with its rotation direction compressing, finally cause the part symmetry that processes very low; Although convex sword broaching tool has overcome the defect of above two kinds of broaching tools, in broaching process, point of a knife place is stressed excessive, easily wear and rupture, thereby the life-span of having reduced cutter.In addition, in broaching process, all can there is a kind of defect in above three kinds of broaching tools, the smear metal producing in i.e. broaching process can press to the gap between broaching tool side and part side along chip pocket under the thrust of follow-up smear metal, so both increased broaching resistance, make again smear metal easily scratch machined surface, thereby cause machining accuracy lower, cannot meet the requirement of high accuracy processing.

Utility model content

(1) technical problem that will solve

The technical problems to be solved in the utility model is how to guarantee, on the basis of the cutter life high at one, can reduce cutting force, guarantees the quality of processing parts, can make again smear metal away from finished surface, thereby process high-precision part.

(2) technical scheme

In order to solve the problems of the technologies described above, the utility model provides a kind of broaching tool, comprises bit body, and described bit body is provided with multiple cutters tooth, between adjacent two described cutters tooth, is provided with chip pocket, and the main cutting edge of described cutter tooth is inner concavity along broaching direction.

Wherein, described main cutting edge can be curved.

Or described main cutting edge can be V-shaped.

Wherein, described cutter tooth is along broaching direction inclination certain angle.

Preferably, described cutter tooth is along broaching direction inclination 5-10 degree.

Wherein, described main cutting edge is symmetrical arranged along the symmetrical plane of bit body.

Wherein, the rake face of described chip pocket and described cutter tooth is connected smoothly.

Wherein, the rear knife face of described cutter tooth is the arcwall face of evagination.

Wherein, described bit body also comprises broaching base plate, and multiple described cutters tooth are arranged in a row or arrange more and are arranged on described broaching base plate.

Wherein, described broaching tool also comprises clamping part, and described clamping part is located at the end of described bit body.

(3) beneficial effect

Compared with prior art, the utlity model has following advantage:

A kind of broaching tool that the utility model provides, the main cutting edge of its cutter tooth is inner concavity along broaching direction, make work in-process smear metal flow to zone line from the two ends of cutter tooth and fall in chip pocket, thereby make smear metal away from machined surface, avoid smear metal to scratch machined surface, improve part crudy, guaranteed the machining accuracy of part;

Described main cutting edge is symmetrical arranged along the symmetrical plane of bit body, like this in broaching process, be positioned at the suffered mutual balance of the power perpendicular to symmetrical plane of blade of symmetrical plane both sides, and cancel out each other, make the broaching tool can self-centering, thereby greatly improved the symmetry of part to be processed;

The suffered cutting force of broaching tool of the present utility model is little, and cutter life is high, and cutter use cost is low.

Accompanying drawing explanation

Fig. 1 is the stereogram of mono-one kinds of broaching tools of the utility model embodiment;

Fig. 2 is the top view of mono-one kinds of broaching tools of the utility model embodiment;

Fig. 3 is the structure chart of 21 kinds of broaching tools of the utility model embodiment.

In figure: 1: cutter tooth; 2: main cutting edge; 3: chip pocket; 4: rear knife face; 5: cutter tooth both sides; 6: symmetrical plane.

The specific embodiment

Below in conjunction with drawings and Examples, the specific embodiment of the present utility model is described in further detail.Following instance is used for illustrating the utility model, but is not used for limiting scope of the present utility model.

Embodiment mono-

As depicted in figs. 1 and 2, a kind of broaching tool providing for the utility model, this broaching tool is mainly used to process keyway and plane, it comprises bit body, described bit body is provided with multiple cutters tooth 1, between adjacent two described cutters tooth 1, be provided with chip pocket 3, described chip pocket 3 is connected smoothly with the rake face of described cutter tooth 1, for holding the smear metal that broaching process produces, the main cutting edge 2 of described cutter tooth 1 is the arc of indent in broaching direction, direction in figure shown in arrow is broaching direction, design this broaching tool form, can in process, guarantee that smear metal flows to zone line from main cutting edge 2 two ends of cutter tooth 1 and falls in described chip pocket 3, avoid smear metal to flow out and scratch machined surface from cutter tooth both sides 5, improve part crudy, guarantee the machining accuracy of part.

For fear of broaching tool in cutting because cutter tooth 1 is cut into and cut out the vibration causing, reduce cutting force, described cutter tooth 1, along broaching direction inclination certain angle, is considered from complexity and the force analysis of tool sharpening, described cutter tooth 1 edge broaching direction preferred angled 5-10 degree.

Described main cutting edge 2 is symmetrical arranged along the symmetrical plane 6 of bit body, like this in broaching process, be positioned at 2 suffered mutual balances of the power perpendicular to symmetrical plane 6 symmetrical on the blade of symmetrical plane 6 both sides, and cancel out each other, make the broaching tool can self-centering, thereby greatly improved the symmetry of part to be processed.

For the structural strength that guarantees that cutter tooth 1 is enough, preferably the rear knife face 4 of described cutter tooth 1 is arranged to the arcwall face of evagination, the weakening to structural strength while being arranged to indent to make up rake face.

Described bit body also comprises broaching base plate, multiple described cutters tooth 1 are arranged in a row or arrange more according to the size of processing plane and are arranged on described broaching base plate, in the time of the thin and long plane of processing or keyway, multiple cutters tooth 1 can be arranged in a row and be arranged on base plate, in the time of the wide plane of processing or keyway, described broaching tool can be lined up two rows, three rows or many rows and be arranged on described base plate.

Described broaching tool also comprises clamping part, and described clamping part is located at the end of described bit body, and described clamping part is used for being arranged on broaching machine, for broaching tool is positioned, plays supplemental support effect.

Embodiment bis-

As shown in Figure 3, the difference of the present embodiment and embodiment mono-is only: the main cutting edge 2 of described cutter tooth 1 also can be the V-arrangement of indent, the opening of described V-arrangement is towards broaching direction, direction in figure shown in arrow is broaching direction, to adapt to different use occasions, described main cutting edge 2 also can be the shape of other indents.

The utility model is suitable for processing characteristic face wide and that precision is high, be applicable to the processing that symmetry is had relatively high expectations, surface roughness requires lower high-precision part, and the suffered cutting force of broaching tool is little, and cutter life is high, and cutter use cost is low.

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.

Claims

1. a broaching tool, comprises bit body, and described bit body is provided with multiple cutters tooth, between adjacent two described cutters tooth, is provided with chip pocket, it is characterized in that, the main cutting edge of described cutter tooth is inner concavity along broaching direction.

2. broaching tool as claimed in claim 1, is characterized in that, described main cutting edge is curved.

3. broaching tool as claimed in claim 1, is characterized in that, described main cutting edge is V-shaped.

4. broaching tool as claimed in claim 2 or claim 3, is characterized in that, described cutter tooth is along broaching direction inclination certain angle.

5. broaching tool as claimed in claim 4, is characterized in that, described cutter tooth is along broaching direction inclination 5-10 degree.

6. broaching tool as claimed in claim 5, is characterized in that, described main cutting edge is symmetrical arranged along the symmetrical plane of bit body.

7. broaching tool as claimed in claim 6, is characterized in that, the rake face of described chip pocket and described cutter tooth is connected smoothly.

8. broaching tool as claimed in claim 7, is characterized in that, the rear knife face of described cutter tooth is the arcwall face of evagination.

9. broaching tool as claimed in claim 8, is characterized in that, described bit body also comprises broaching base plate, and multiple described cutters tooth are arranged in a row or arrange more and are arranged on described broaching base plate.

10. broaching tool as claimed in claim 9, is characterized in that, it also comprises clamping part, and described clamping part is located at the end of described bit body.