CN106466745A - Screwer - Google Patents

Abstract

A kind of screwer, not long in order to solve the problems, such as current screwer service life.The screwer of the present invention comprises：One handle of a knife；And a cutter head, the coaxially connected one end in this handle of a knife of this cutter head, the circumferential surface of this cutter head is provided with least one cutting edge, one chip area passes through this cutting edge and to the extension of this handle of a knife from the free end face of this cutter head, this cutting edge forms a blade farthest away from the ora terminalis of this cutter head center, one end that this blade adjoins this chip area forms a bigger diameter end point, and the other end that this blade adjoins this chip area forms a path end points, and the distance of this blade to this cutter head center is decremented to this path end points by this bigger diameter end point.

Description

Screwer

Technical field

The present invention is with regard to a kind of cutter, especially a kind of screwer in order to work pieces process is gone out with screw thread.

Background technology

Refer to Fig. 1, it is a kind of existing screwer 9, the front end of this existing screwer 9 is correspondingly provided with a chip area 92 in the first-class angular distribution threading tool blade 91 being provided with several same sizes of circumferential surface, respectively this adjacent side of threading tool blade 91；Respectively the outside of this threading tool blade 91 is provided with several cutting threading tools 911.Structure accordingly, during this existing screwer 9 high-speed rotation, can be cut to the surface feed of a workpiece by this several threading tool blade 91, with the surface forming screw thread of this workpiece.An embodiment similar to this existing screwer 9 has been exposed in the middle of TaiWan, China bulletin M497574 Patent Case.

Wherein, after certain cutting number of times, respectively passivation is needed reconditioning so as to sharp once again by several cutting threading tools 911 of this threading tool blade 91；But, due to several threading tool blades 91 of this existing screwer 9 and be not attached to so that reconditioning operation cannot be carried out continuously, and it is intended to respectively this threading tool blade 91 reconditioning one by one.Thus, not only reconditioning operation is not easy to operate, cause grinding efficiency not good, respectively several cutting threading tools 911 of this threading tool blade 91 are also difficult to unanimously by the degree of reconditioning, thus directly affecting cutting quality, therefore this existing screwer 9 can only allow reconditioning mostly once eliminating to secondary, the error amount otherwise cutting will be excessive and affect product yield.

In view of this, existing screwer still has the necessity improved really.

Content of the invention

The present invention provides a kind of screwer, can lift convenience during reconditioning cutting edge, and guarantee that reconditioning is respond well, to maintain good cutting quality.

The present invention provides a kind of screwer, can not reduce cutting quality through multiple reconditioning, can significantly extend the service life of this screwer.

A kind of screwer of the present invention, comprises：One handle of a knife；And a cutter head, the coaxially connected one end in this handle of a knife of this cutter head, the circumferential surface of this cutter head is provided with least one cutting edge, one chip area passes through this cutting edge and to the extension of this handle of a knife from the free end face of this cutter head, this cutting edge forms a blade farthest away from the ora terminalis of this cutter head center, one end that this blade adjoins this chip area forms a bigger diameter end point, and the other end that this blade adjoins this chip area forms a path end points, and the distance of this blade to this cutter head center is decremented to this path end points by this bigger diameter end point.

Wherein, this handle of a knife has a central shaft, and the blade of this cutting edge is coaxial with the central shaft of this handle of a knife.

Wherein, the wall of this chip area has a tangent line at this bigger diameter end point, this tangent line with an angle is had by the radial direction line of this bigger diameter end point；The wall of this chip area has another tangent line at this path end points, this another tangent line with another angle is had by the radial direction line of this path end points；The difference of this two angle is more than or equal to 5 °.

Wherein, the difference of this two angle preferably less than or is equal to 15 °.

Accordingly, the screwer of the present invention, can reach the operation ease of lifting reconditioning operation, lifts grinding efficiency, guarantee respond well, good to the workpiece maintenance cutting quality of reconditioning, extend the service life of this screwer to reduce the multi-efficiencies such as cutter cost depletions.

Brief description

Fig. 1：A kind of structural representation of existing screwer.

Fig. 2：The perspective view of one embodiment of the invention.

Fig. 3：The planar structure schematic diagram of one embodiment of the invention.

Fig. 4：The radial section structural representation of the cutting edge of one embodiment of the invention.

Fig. 5：Another kind of radial section structural representation of the cutting edge of one embodiment of the invention.

The present invention

1 Handle of a knife

2 Cutter head 21 cutting edges

211 Blade 22 chip areas

A Central shaft D1, D2, D3 distance

L1 Connect straight line L2 vertical line

P1 Bigger diameter end point P2 path end points

P3, P4 end points θ 1, θ 2 angle

Prior art

9 Screwer 91 threading tool blades

911 Cutting threading tool 92 chip areas.

Specific embodiment

It is that above and other objects, features and advantages of the invention can be become apparent, presently preferred embodiments of the present invention cited below particularly, and coordinate institute's accompanying drawings, it is described in detail below：

Refer to Fig. 2 and 3, it is an embodiment of screwer of the present invention, this screwer generally comprises a handle of a knife 1 and a cutter head 2, and this cutter head 2 is connected to one end of this handle of a knife 1.

This handle of a knife 1 has a central shaft A, and this handle of a knife 1 is available for folder tug on the chuck of the rotary machining tool machine such as lathe or milling machine, enable the cutter head 2 of this screwer exactly with workpiece para-position, and workpiece is carried out with the processing operation of screw cutting.

The coaxially connected one end in this handle of a knife 1 of this cutter head 2, to be driven and synchronous rotary by this handle of a knife 1.The circumferential surface of this cutter head 2 is provided with least one cutting edge 21, and the quantity of this cutting edge 21 can select according to the screw thread quantity of required machine-shaping, and this is that in this area, tool usually intellectual is appreciated that；The present embodiment schema taking be provided with the cutter head 2 of several cutting edges 21 as a example presents, but is not limited thereto.

This several cutting edge 21 is arranged side by side, and this cutter head 2 is additionally provided with a chip area 22, this chip area 22 is extended from the free end face of this cutter head 2 by this several cutting edge 21 and to this handle of a knife 1, produced crumble during cutting workpiece is enable to exclude by this chip area 22, so as to maintaining the smoothness of machining.

Refer to Fig. 3 and Fig. 4, respectively this cutting edge 21 is farthest away from this cutter head 2 center（This central shaft A passes through place）Ora terminalis formed a blade 211, this blade 211 is also coaxial with the central shaft A of this handle of a knife 1, one end that this blade 211 adjoins this chip area 22 forms a bigger diameter end point P1, the other end that this blade 211 adjoins this chip area 22 forms a path end points P2, and the distance of this blade 211 to this cutter head 2 center is decremented to this path end points P2 by this bigger diameter end point P1.

According to by aforementioned structure, when toolroom machine drives this screwer high-speed rotation, brand-new screwer will be by the bigger diameter end point P1 contact workpiece on its cutting edge 21, and the surface feed to workpiece is cut, with the surface forming screw thread of this workpiece.After certain cutting number of times, will be passivated at the bigger diameter end point P1 of this screwer；Now, as long as operator nearby carry out reconditioning at this bigger diameter end point P1, to reduce this section to the distance at this cutter head 2 center, make on this blade 211 not by reconditioning to section in, the end points P3 of closest this bigger diameter end point P1 becomes the position of protrusion on this cutting edge 21.That is, this end points P3 be located between this bigger diameter end point P1 and this path end points P2, this end points P3 to this cutter head 2 center apart from D3 former less than being more than apart from D2 apart from D1, after reconditioning, this end points P3 to this cutter head 2 center apart from D3 then be more than apart from D1 and apart from D2.Accordingly, this screwer is possible to by the end points P3 contact workpiece on its cutting edge 21, with the surface cut forming thread of this workpiece.

The rest may be inferred, at this end points P3 be passivated after, then again at this end points of reconditioning P3 near, to reduce this section to the distance at this cutter head 2 center, make on this blade 211 not by reconditioning to section in, the end points P4 of closest this bigger diameter end point P1 becomes the position of protrusion on this cutting edge 21.

Wherein, refer to Fig. 5, the wall of this chip area 22 has a tangent line L1 at this bigger diameter end point P1, this tangent line L1 with an angle theta 1 is had by the radial direction line of this bigger diameter end point P1（It is the cutting angle of this screwer）；The wall of this chip area 22 has a tangent line L2 at this path end points P2, this tangent line L2 with an angle theta 2 is had by the radial direction line of this path end points P2.This angle theta 1 is approximately greater than or equal to 5 ° with the difference of this angle theta 2, if this difference is less than 5 °, when this screwer is to workpiece cutting forming screw thread, this screwer is easily interfered with the lead angle of screw thread；Relatively, this two angle theta 1, θ 2 difference bigger, the girth of this blade 211 is then shorter, causes this screwer can be reduced by the number of times of reconditioning, therefore this difference preferably less than or is equal to 15 °.

In sum, the screwer of the present invention, it is available for users to and the position reconditioning of passivation on its cutting edge is fallen, and machining is not proceeded by reconditioning to sharp position, therefore the target of reconditioning is that the position being passivated is removed, rather than the position of passivation is ground to sharp so that reconditioning operation is fairly easy to operate and can be rapidly completed again；For having the screwer of several cutting edges, also relatively easily make each cutting edge consistent by the effect of reconditioning.Therefore, the screwer of the present invention can maintain good cutting quality.

Furthermore, the screwer of the present invention, can not reduce cutting quality through multiple reconditioning, the whole blade of its cutting edge can after the reconditioning of not homogeneous the sequentially position as cutting workpiece, until using the end of this blade（At this path end points）Also after being passivated, this screwer just need to be eliminated, therefore its service life is about more than the decades of times of existing screwer.Therefore, the screwer of the present invention can durable use, and reduces the cost of cutter loss.

Although the present invention has utilized above-mentioned preferred embodiment to disclose; so it is not limited to the present invention; any it is familiar with this those skilled in the art within without departing from the spirit and scope of the present invention; above-described embodiment carries out various changes and modification still belongs to the technology category that the present invention is protected relatively, and therefore protection scope of the present invention is when by being defined that claim is defined.

Claims (4)

1. a kind of screwer is it is characterised in that it comprises：

One handle of a knife；And

One cutter head, the coaxially connected one end in this handle of a knife of this cutter head, the circumferential surface of this cutter head is provided with least one cutting edge, one chip area passes through this cutting edge and to the extension of this handle of a knife from the free end face of this cutter head, this cutting edge forms a blade farthest away from the ora terminalis of this cutter head center, one end that this blade adjoins this chip area forms a bigger diameter end point, the other end that this blade adjoins this chip area forms a path end points, and the distance of this blade to this cutter head center is decremented to this path end points by this bigger diameter end point.

2. it is characterised in that wherein, this handle of a knife has a central shaft to screwer as claimed in claim 1, and the blade of this cutting edge is coaxial with the central shaft of this handle of a knife.

3. it is characterised in that wherein, the wall of this chip area has a tangent line at this bigger diameter end point to screwer as claimed in claim 2, this tangent line with an angle is had by the radial direction line of this bigger diameter end point；The wall of this chip area has another tangent line at this path end points, this another tangent line with another angle is had by the radial direction line of this path end points；The difference of this two angles is more than or equal to 5 °.

4. right wants screwer as described in 3 it is characterised in that wherein, the difference of this two angles is less than or equal to 15 °.