CN105618647A

CN105618647A - Cold rolling method of tool blank

Info

Publication number: CN105618647A
Application number: CN201610103881.9A
Authority: CN
Inventors: 唐良能
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-02-25
Filing date: 2016-02-25
Publication date: 2016-06-01
Anticipated expiration: 2036-02-25
Also published as: CN105618647B

Abstract

The invention provides a cold rolling method of a tool blank. The cold rolling method comprises the following steps: (S101) an edge end of a blank material is put in a roller inlet of a rolling mill for primary rolling, so that the thickness of the edge end of the blank material is reduced by 0.3-0.8 mm; and (S102) the edge end of the blank material is put in the roller inlet of the rolling mill for secondary rolling, so that the thickness of the edge end of the blank is reduced by 0.3-0.8 mm. The edge end of the blank material is firstly fed in the rolling mill for rolling; and the blank material is fed by the rolling mill. After the rolling is finished, the thickness of the blank material is trapezoidally distributed; the thickness of the edge end minimally satisfies subsequent machining demands of a tool; a tool sample is closer to the standard; and after two times of rolling, the strength and the hardness of the tool blank are increased, and the toughness plastic index of the tool blank is decreased, so that the strength of the tool blank as the tool can be guaranteed. The secondary rolling can achieve a flattening effect on the surface of the blank.

Description

The cold rolling process of cutter blank

Technical field

The present invention relates to tooling cost field, particularly relate to the cold rolling process of a kind of cutter blank.

Background technology

Existing cutter blank processing method is: adopt belt drop hammer that blank is forged, and makes blank form hilt blank; After blank is carried out high-temperature heating, by belt drop hammer, the blade part of high temperature blank is forged, blank is thinned wide generation just base; Then first base is cut into slices, form cutter blank. But, in technique scheme, when the blade of high temperature blank is forged by belt drop hammer, forge uneven, blade seems uneven because forging. And in forging process, be that the whole plane to blank is processed, causing that the cutter blank after processing is of uniform thickness, the knife back and blade cannot make differentiation. Visible, existing cutter blank processing method there is problems in that the blade of cutter blank seems uneven because forging, and causes that cutter blank passing rate of processing is low; And being of uniform thickness of whole cutter blank, the knife back and blade cannot make differentiation.

Summary of the invention

It is an object of the invention to provide the cold rolling process of cutter blank, it is not necessary to through Overheating Treatment, operation is simple, and blade does not have uneven, and the blade part thickness of cutter blank after processing can be made with knife back portion thin.

In order to achieve the above object, the present invention provides following technical scheme,

The cold rolling process of cutter blank, it comprises the following steps:

Step S101, carries out the first passes by the roll entrance that the blade end of blank puts into milling train, makes the thickness of the blade end of blank reduce 0.3-0.8mm;

Step S102, carries out the second passes by the roll entrance that the blade end of blank puts into milling train, makes the thickness of the blade end of blank reduce 0.3-0.8mm.

In step S101, the blade end of blank is introduced into milling train and rolls, and blank is nipped by milling train. After rolling, the thickness stepped cross distribution of blank, the thickness of blade end is minimum. Carrying out second time rolling then through step S102, the thickness of blade end diminishes further. Cutter blank intensity, hardness after twice passes rise, tough index of moulding declines, it is possible to ensure its intensity as cutter. And, smooth effect can be played in the surface of blank by secondary rolling. It is introduced into the thickness of blade end of mill milling less than knife back end, meets the actually used demand of cutter, reduce follow-up manufacturing procedure.

In a kind of preferred implementation, in step S101, the blade end thickness of described blank reduces 0.5mm. Control in the deflection of 0.5mm, it is possible to ensure that the deformation of whole blank is uniform.

In a kind of preferred implementation, in step s 102, the blade end thickness of described blank reduces 0.5mm.

In a kind of preferred implementation, in step S101, described blank is the steel plate of thick 2-4mm.

In a kind of preferred implementation, in step S101, described blank is the steel plate of thick 3.5mm.

In a kind of preferred implementation, in step S101, the roll-force of milling train is 200-500kN. This roll-force can effectively control blank nip and ensure blank rolling after THICKNESS CONTROL between 0.3-0.8mm.

In a kind of preferred implementation, in step S101, the roll-force of milling train is 350kN.

In a kind of preferred implementation, also included before step S101, step S1001, select suitable rustless steel to roll volume;

Step S1002, rolls rustless steel volume and pulls into straight band, and straight band is carried out horizontal cutting, make straight band be cut into steel plate;

Step S1003, is undertaken being stamped and formed out blank by steel plate.

The invention have the benefit that

The blade end of blank is introduced into milling train and rolls, and blank is nipped by milling train. After rolling, the thickness stepped cross distribution of blank; The minimum follow-up process requirements meeting cutter of the thickness of blade end, cutter sample is closer to standard; Cutter blank intensity, hardness after twice passes rise, tough index of moulding declines, it is possible to ensure its intensity as cutter. And, smooth effect can be played in the surface of blank by secondary rolling.

Accompanying drawing explanation

In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the flow chart of one embodiment of the present invention.

Detailed description of the invention

Below in conjunction with the accompanying drawing of the present invention, technical scheme is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments. Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.

The cold rolling process of cutter blank provided by the invention, it comprises the following steps, such as Fig. 1,

Step S1001, selects martensitic stain less steel to roll volume as processing raw material.

Step S1002, rolls rustless steel volume and pulls into straight band, and straight band is carried out horizontal cutting, make straight band be cut into steel plate.

Step S1003, is undertaken being stamped and formed out blank by plate. Blank is of a size of wide 8cm, long 16cm, thick 0.35cm. Tool dimension according to processing, the size of blank can also be adjusted correspondingly, and as adjusted in the scope of 0.2-0.4cm, can meet the demand of processing cutter blank.

Step S101, the roll entrance that the blade end of blank is put into double-roll rolling mill carries out the first passes, and controlled rolling power, between 200-500kN, makes the thickness of the blade end of blank reduce 0.3-0.8mm through rolling. Preferably, controlled rolling power, between 350kN, makes the thickness of the blade end of blank reduce 0.5mm through rolling.

Step S102, the roll entrance that the blade end of blank is put into double-roll rolling mill carries out the second passes, and controlled rolling power, between 200-500kN, makes the thickness of the blade end of blank reduce 0.3-0.8mm through rolling. Preferably, controlled rolling power, between 350kN, makes the thickness of the blade end of blank reduce 0.5mm through rolling.

Cutter blank intensity, hardness after twice passes rise, tough index of moulding declines, it is possible to ensure its intensity as cutter. And, smooth effect can be played in the surface of blank by secondary rolling. Adopting cold rolling method, the cutter material surface smoothness after processing is significantly larger than hot rolling, and the material density of cutter material is evenly, and hardness is higher. Meanwhile, it is introduced into the thickness of blade end of mill milling less than knife back end, meets the actually used demand of cutter, reduce follow-up manufacturing procedure.

The cutter blank that the cutter blank made by above-described embodiment and prior art are made carries out performance test, concrete data such as table one. Visible, that the present embodiment is made cutter blank, its surface smoothness is significantly larger than the cutter blank that existing hot rolling mode is made, and the uniform situation of its density is also better than existing cutter blank; And, the material density and hardness of cutter blank is all higher than existing cutter blank. In this enforcement, operation is simple, it is not necessary to through Overheating Treatment, the surface of cutter blank will not because being thermally formed oxide-film; And operation easier is lower, the cutter blank made is closer to the standard of cutter.

Table one

The above; being only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope that the invention discloses; change can be readily occurred in or replace, all should be encompassed within protection scope of the present invention. Therefore, protection scope of the present invention should described be as the criterion with scope of the claims.

Claims

1. the cold rolling process of cutter blank, it is characterised in that comprise the following steps:

2. the cold rolling process of cutter blank according to claim 1, it is characterised in that: in step S101, the blade end thickness of described blank reduces 0.5mm.

3. the cold rolling process of cutter blank according to claim 1 or claim 2, it is characterised in that: in step s 102, the blade end thickness of described blank reduces 0.5mm.

4. the cold rolling process of cutter blank according to claim 1 or claim 2, it is characterised in that: in step S101, described blank is the steel plate of thick 2-4mm.

5. the cold rolling process of cutter blank according to claim 4, it is characterised in that: in step S101, described blank is the steel plate of thick 3.5mm.

6. the cold rolling process of cutter blank according to claim 1 or claim 2, it is characterised in that: in step S101, the roll-force of milling train is 200-500kN.

7. the cold rolling process of cutter blank according to claim 6, it is characterised in that: in step S101, the roll-force of milling train is 350kN.

8. the cold rolling process of cutter blank according to claim 1, it is characterised in that: also included before step S101, step S1001, select suitable rustless steel to roll volume;

Step S1003, is undertaken being stamped and formed out blank by steel plate.