CN203448734U

CN203448734U - Compound tool

Info

Publication number: CN203448734U
Application number: CN201320496427.6U
Authority: CN
Inventors: 林柄达
Original assignee: TOPGREEN TECHNOLOGY Co Ltd
Current assignee: TOPGREEN TECHNOLOGY Co Ltd
Priority date: 2013-08-14
Filing date: 2013-08-14
Publication date: 2014-02-26
Anticipated expiration: 2023-08-14

Abstract

The utility model discloses a compound tool which comprises a handle part and a tool head part, wherein the handle part is made of stainless steel or carbon steel, the tool head part is made of tungsten steel, a clamping stem body and a tool bar body are respectively formed at the two ends of the handle part, the outer diameter of the tool bar body is smaller than the outer diameter of the clamping stem body, a convex column is formed in the center of the end face of the handle part, the centers of the two end faces of the tool head part are penetrated so as to form a penetrated hole, and one end face of the tool head part is attached to the end face of the tool bar body, the inner circumferential surface of the penetrated hole is attached to the outer circumferential surface of the convex column of the tool bar body, therefore, when the tool is used for tapping or milling, the tool bar body made of stainless steel or carbon steel has small possibility of breaking, and the bonding strength of the joint of the handle part and the tool head part is increased.

Description

Composite cutter

Technical field

The utility model relates to a kind of cutter, espespecially a kind of composite cutter for tapping or milling.

Background technology

General cutter for cutting can form different cutter head forms according to the difference of function, for example: cutter head is tip shape person and mostly is and on machined object, forms boring cutter, cutter head and be flat-head shape person and mostly be and on machined object, in established hole, form the cutter that thread or milling are used.The existing a kind of screw tap cutter that forms internal screw thread on machined object in hole of take is example, as shown in Figure 5, it includes a stainless steel or carbon steel grip shank 51 processed and wolfram steel knife bar 52 processed, knife bar body 520 rear ends of knife bar 52 with welding manner secure bond in one end of grip shank 51, the front end of knife bar body 520 is formed with cutter head 521, on cutter head 521 outer peripheral faces, be formed with the thread that tapping is used, and extend to the outer peripheral face of knife bar body 520 from cutter head 521, be formed with the spiral helicine chip area 522 of multiple tracks.

Existing internal screw thread screw tap cutter is when using, first grip shank 51 is clamped and fastened on board, with the cutter head 521 of knife bar 52, aim at the hole of wanting tapping on machined object again, by board, rotate grip shank 51, and then make cutter head 521 tapping internal screw thread on the hole wall of hole of knife bar 52, during tapping, the complementary thread thread form that becomes is discharged or pushed to the bits material of unnecessary machined object by chip area 522.

Because internal screw thread screw tap cutter must the application of force reverse grip shank 51 when the tapping, therefore the employing more than 51 of existing grip shank can be born stainless steel or the carbon steel material of larger torsion, again for ease of to the thread clearly of tapping on the hole wall of hole on machined object, knife bar more than 52 adopts the higher wolfram steel material of hardness, whereby so that good internal screw thread quality and the life-span to be provided.

Yet, although existing internal screw thread screw tap cutter is with stainless steel or the resistance to torsion of carbon steel and the hard characteristic of wolfram steel, but the knife bar body of knife bar 52 520 is for coordinating hole aperture on machined object, must possess certain length, and with the hard crisp made knife bar body of wolfram steel of quality, in the process of merit tooth, how cannot bear the torsion that cutter High Rotation Speed produces, the easy process Fracture in tapping, not only cause the loss of tapping bad and cutter, also easily increase the danger in operation simultaneously.

Because above existing screw tap or milling cutter are in to the process of machined object work, the knife bar body of cutter easily ruptures, therefore causing the problem of thread or milling bad and cutter loss, is head it off, the utility model proposes a kind of composite cutter.

Utility model content

The purpose of this utility model is to propose a kind of composite cutter, in to the tapping of machined object work or formation milling process, can make the not composite cutter of easy fracture of knife bar body, to improve thread or milling quality and life-span, reduce the loss of cutter whereby simultaneously.

Composite cutter of the present utility model, includes:

The handle of a knife portion of one stainless steel or carbon steel system, its two ends form respectively a grip shank body and a knife bar body, and the external diameter of this knife bar body is less than the external diameter of this grip shank body, and forms a projection in end face central authorities; And

The cutter head portion of one wolfram steel system, it runs through and forms a through hole in both ends of the surface central authorities, and this cutter head portion is engaged on the end face of this knife bar body with an end face, and the inner peripheral surface of this through hole is engaged on the projection outer peripheral face of this knife bar body.

Preferably, the axial length of cutter head portion be less than knife bar body and cutter head portion axial length summation 1/2nd, and knife bar body is formed with multiple tracks knife bar chip area on outer peripheral face, cutter head portion is formed with multiple tracks cutter head chip area on outer peripheral face, and cutter head chip area correspondence is communicated in this knife bar chip area.

By above-mentioned structure, composite cutter of the present utility model is convexly equipped with projection on the knife bar body end face of handle of a knife portion, with projection, inserting in the through hole of cutter head portion, knife bar body and the cutter head portion of handle of a knife portion are not only bonded with each other with end face, the inner peripheral surface of through hole and the outer peripheral face of projection are also bonded with each other, therefore, more can increase bond strength and the steadiness of joint.

Moreover, the axial length of cutter head portion be less than knife bar body and cutter head portion axial length summation 1/2nd, it is high that the cutter head portion of the wolfram steel system of adding has hardness, with the knife bar body of stainless steel or carbon steel system, can bear high torsion, therefore, cutter is in to the process of machined object work, even if large torsion bears in portion of handle of a knife portion, knife bar body is also not easy thereby ruptures, therefore good and stable thread or milling quality and the life-span can be provided.

Accompanying drawing explanation

Fig. 1 is stereoscopic figure of the present utility model.

Fig. 2 is part sectioned view of the present utility model.

Fig. 3 is local amplification profile of the present utility model.

Fig. 4 is the local combination section that amplifies of the present utility model.

Fig. 5 is the stereoscopic figure of existing cutter.

Main element label declaration:

10 cutter 11 handle of a knife portions

110 grip shank body 111 knife bar bodies

112 projection 113 knife bar chip areas

12 cutter head portion 120 through holes

121 cutter head chip areas

The axial length of L1 cutter head portion

The axial length summation of L2 knife bar body and cutter head portion

51 grip shank 52 knife bars

520 knife bar body 521 cutter heads

522 chip areas

The specific embodiment

For technical characterictic of the present utility model, object and effect being had more clearly, understand, now contrast accompanying drawing the specific embodiment of the present utility model is described.

Composite cutter of the present utility model, please refer to Fig. 1 and Fig. 2, cutter 10 includes a handle of a knife portion 11 and a cutter head portion 12, wherein, this handle of a knife portion 11 is for stainless steel or carbon steel material is one-body molded makes, two ends form respectively a columned grip shank body 110 and a knife bar body 111, this knife bar body 111 is extended to form by one end of this grip shank body 110, and external diameter is less than the external diameter of this grip shank body 110, in the end face central authorities of this knife bar body 111, protrude and form a projection 112, this projection 112 can be and on outer peripheral face, is formed with the cylindric of at least one abutment face or is polygon column, and this knife bar body 111 is formed with the spiral helicine knife bar chip area 113 of multiple tracks in outer peripheral face.

This cutter head portion 12 is that wolfram steel material is made, in the both ends of the surface central authorities of this cutter head portion 12, run through and form a through hole 120, and be formed with multiple tracks helical form cutter head chip area 121 in outer peripheral face, cutter head chip area 121 correspondences are communicated in the knife bar chip area 113 of this knife bar body 111, moreover, the axial length of this cutter head portion 12 is L1, this knife bar body 111 is L2 with the axial length summation of this cutter head portion 12, and the axial length L 1 of this cutter head portion 12 is less than 1/2nd (being L1<1/2L2) of the axial length summation L2 of this knife bar body 111 and this cutter head portion 12.

Please refer to Fig. 3 and Fig. 4, above-mentioned cutter head portion 12 is sheathed on the projection 112 of knife bar body 111 with through hole 120, and utilize the technological means secure bond such as welding, wherein, the end joined of this cutter head portion 12 is in the end face of this knife bar body 111, through hole 120 inner peripheral surfaces of this cutter head portion 12 are engaged in projection 112 outer peripheral faces of this knife bar body 111, and the through hole 120 interior expansions of when welding gas can be discharged by through hole 120, cutter head portion 12 can more closely engage with the joint of knife bar body 111 whereby.

Composite cutter of the present utility model, due to the axial length L 1 of cutter head portion 12 be less than knife bar body 111 and cutter head portion 12 axial length summation L2 1/2nd, add cutter head portion 12 for wolfram steel material, and it is high to have hardness, and the knife bar body 111 of handle of a knife portion 11 adopts stainless steel or carbon steel material, and have, can bear high torsion characteristic, therefore, cutter 10 of the present utility model in use, even if large torsion bears in handle of a knife portion 11, the knife bar body 111 of stainless steel or carbon steel system is also not easy fracture, therefore good and stable thread or milling quality and the life-span can be provided.

Moreover, the joint of knife bar body 111 of the present utility model and cutter head portion 12, except utilizing both end faces to be welded to each other combination, in the through hole 120 of the projection 112 insertion cutter head portions 12 that are convexly equipped with in knife bar body 111 end faces, be bonded with each other fixing, therefore, more can increase bond strength and the steadiness of joint.

The foregoing is only the schematic specific embodiment of the utility model, not in order to limit scope of the present utility model.Any those skilled in the art, is not departing from equivalent variations and the modification of doing under the prerequisite of design of the present utility model and principle, all should belong to the scope of the utility model protection.

Claims

1. a composite cutter, is characterized in that, described composite cutter includes:

The handle of a knife portion of one stainless steel or carbon steel system, its two ends form respectively a grip shank body and a knife bar body, and the external diameter of described knife bar body is less than the external diameter of described grip shank body, and forms a projection in end face central authorities; And

The cutter head portion of one wolfram steel system, it runs through and forms a through hole in both ends of the surface central authorities, and described cutter head portion is engaged in an end face on the end face of described knife bar body, and the inner peripheral surface of described through hole is engaged on the projection outer peripheral face of described knife bar body.

2. composite cutter as claimed in claim 1, is characterized in that, the axial length of described cutter head portion be less than described knife bar body and described cutter head portion axial length summation 1/2nd.

3. composite cutter as claimed in claim 1 or 2, it is characterized in that, described knife bar body is formed with multiple tracks knife bar chip area on outer peripheral face, and described cutter head portion is formed with multiple tracks cutter head chip area on outer peripheral face, and described cutter head chip area correspondence is communicated in described knife bar chip area.