CN201154471Y

CN201154471Y - Back-screwing type screwdriver

Info

Publication number: CN201154471Y
Application number: CNU2008200105592U
Authority: CN
Inventors: 王世伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-01-31
Filing date: 2008-01-31
Publication date: 2008-11-26
Anticipated expiration: 2018-01-31

Abstract

The utility model relates to a derotation-type tap extracter of a broken-tap processing device in the mechanical production, processing and maintenance. The tap starter extracter is essentially composed of a derotation square head, an extracter body and meshing claws; the meshing claws are arranged at the upper part of the extracter body, the derotation square head is arranged at the lower part of the extracter body, thereby the three parts forming an integrated structure; the meshing claw parts are three or four which are distributed in the shape of circumference. Compared with the prior art, the derotation-type tap extracter of the utility model has the advantages that: the derotation-type tap extracter is composed of the derotation square head, the extracter body and the meshing claws, has simple and reasonable integral structure and high success rate in processing broken taps, saves time, can carry out processing on site and causes no discarded work piece.

Description

Derotation formula screw tap opens

Technical field

The utility model relates to a kind of machine-building, machining, the disconnected awl treating apparatus in the flight-line maintenance process.

Background technology

In machining manufacturing and maintenance process, the processing method of endoporus silking be with the machine of national standard with or set tap carry out, because screw tap is in metal cutting process, the material purposes of workpiece changes, the material requested quality is also changing, and the material of screw tap is certain, so its stressed size is also changing.This multiple force request adds the difference of skilled worker's technical merit, the factors such as machining tolerance of screw tap in heat treatment process, fracture, the disrepair phenomenon of screw tap in metal cutting process often appears, this phenomenon in machining manufacturing, maintenance process, carry out see not bright.

Occur in the prior art at present adopting following several method to handle usually after the disconnected awl phenomenon;

1) with little the dashing of self-control, shovel, cut a hole, knock, make disconnected awl loosening, short awl is taken out in the progressive derotation, and difficulty is big in this process, and service time is long, and success rate only accounts for less than 30%.

2) the disconnected awl of electricity consumption soldering defective is portalled, use the spanner derotation, this method is because the welding rod material is different with the screw tap quality of materials, frangibility more after the welding, and require skilled worker's solder technology height, one may cause the sticking connection of disconnected awl and workpiece accidentally slightly, prove an abortion, scrap workpiece, this method required time is long, success rate is low, and can't weld the derotation to little screw tap.

3) destroy disconnected awl with the galvano-cautery of spark-erosion machine tool, this method can guarantee the quality of workpiece fully, but the working range of spark-erosion machine tool is subjected to certain restriction, can't process for big workpiece, and spark-erosion machine tool is professional extremely strong, service efficiency is low, and the time is long, and the fault workpiece need be transported to spark machined from processing site.

4) abandon hole after the existing processing, cloth hole again, this method is to use reluctantly, only limits to plant maintenance.

5) workpiece is scrapped.

Summary of the invention

The purpose of this utility model is to solve the deficiencies in the prior art parts, provides a kind of manual specific purpose tool derotation formula screw tap to open, and it is by reversing and shearing force, and adopts the material of certain intensity and toughness; Make its disconnected awl derotation taking-up and guaranteed that workpiece is intact.

For achieving the above object, the utility model is by the following technical solutions:

Derotation formula screw tap opens, and it is characterized in that: it by derotation square toes, open body and the engaged claw three parts are formed, engaged claw is on the top of opening body, derotation square toes are in the bottom of opening body, three parts are structure as a whole.

Described engaged claw is three or four and is circle distribution.

Compared with prior art, the beneficial effects of the utility model are:

Derotation formula screw tap of the present utility model opens by derotation square toes, opens body and the engaged claw three parts are formed, the overall structure advantages of simple, and its handles disconnected awl success rate height, saves time, and handle on the spot at the scene, and workpiece does not have the advantage of scrapping.

Description of drawings

Fig. 1 is that engaged claw that derotation formula screw tap opens is four a structural representation.

Fig. 2 is the right view of Fig. 1.

Fig. 3 is the A-A cutaway view of Fig. 1.

Fig. 4 is that engaged claw that derotation formula screw tap opens is three a structural representation.

Fig. 5 is the right view of Fig. 4.

Fig. 6 is the B-B cutaway view of Fig. 4.

Among the figure: 1, derotation square toes 2, open body 3, engaged claw

The specific embodiment

See Fig. 1-Fig. 4, derotation formula screw tap opens, by derotation square toes 1, open body 2 and engaged claw 3 three parts are formed.Engaged claw 3 is on the top of opening body 2, and derotation square toes 1 are in the bottom of opening body 2, and three parts are structure as a whole.

Model according to fracture of wire awl is different with shape, and the engaged claw 3 that the derotation formula awl of employing opens is also different, and as Fig. 1 and Fig. 4, engaged claw 3 can be described engaged claw and is three or four and is circle distribution.When awl is broken in processing, the disconnected appearance of boring of engaged claw 3 insertions that derotation formula screw tap opens is cut in the groove, will twist hand and be contained on the derotation square toes 1, get final product (firmly method is identical with the hand tapping method of operating) with the derotation of tapping direction rightabout.

Claims

1, derotation formula screw tap opens, and it is characterized in that: it by derotation square toes, open body and the engaged claw three parts are formed, engaged claw is on the top of opening body, derotation square toes are in the bottom of opening body, three parts are structure as a whole.

2, derotation formula screw tap according to claim 1 opens, and it is characterized in that: described engaged claw is three or four and is circle distribution.