CN203696165U

CN203696165U - Tapping device

Info

Publication number: CN203696165U
Application number: CN201320758424.5U
Authority: CN
Inventors: 季建平
Original assignee: ZHENJIANG DAXING MACHINERY MANUFACTURING Co Ltd
Current assignee: ZHENJIANG DAXING MACHINERY MANUFACTURING Co Ltd
Priority date: 2013-11-27
Filing date: 2013-11-27
Publication date: 2014-07-09
Anticipated expiration: 2023-11-27

Abstract

The utility model relates to a tapping device, and belongs to the technical field of metal processing. The tapping device comprises a screw tap cutter arbor and a cutter holder guide sleeve which are in clearance fit. According to the tapping device, the screw tap cutter arbor and the cutter holder guide sleeve are in clearance fit, so that after completion of tapping of a screw tap, as a gap is reserved between the screw tap cutter arbor and the cutter holder guide sleeve, interference cannot be caused between the screw tap and a workpiece during retracting, the working efficiency is greatly improved, quickness in retracting is achieved, and the processing quality of the workpiece is improved. As the further improvement, the outer circumferential surface of the screw tap cutter arbor is partially milled flatly, and a stop block is mounted in the corresponding position of the cutter holder guide sleeve, so that the screw tap cutter arbor can just perform axial movement and cannot rotate.

Description

Chasing bar

Technical field

The utility model belongs to metalworking technology field, relates in particular to a kind of chasing bar.

Background technology

Since machinery tapping is market-oriented, light, flexible, efficient and have advantages of that other similar devices cannot replace, and is subject to users' love deeply with it.It has avoided the limitation of drilling machine or hand tapping, and save time, laborsaving, be difficult for not frangibility etc. of rotten tooth, screw tap, its outstanding feature is subject to user's extensive favorable comment and employing.Be applicable to all machine industries.

Present turret lathe chasing bar, what screw tap knife bar and lathe knife seat guide pin bushing adopted is that gapless coordinates, and after the tapping of screw tap axial feed completes, in the time of withdrawing, often interferes with processing work, causes bad tooth, production efficiency low.

Utility model content

For above-mentioned technical problem, the utility model provides a kind of rapid return, chasing bar that workpiece crudy is good.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is, a kind of chasing bar, comprises screw tap knife bar and tool rest guide pin bushing, and described screw tap knife bar and described tool rest guide pin bushing are matched in clearance.

The utility model chasing bar, described screw tap knife bar and described tool rest guide pin bushing adopt matched in clearance, after tap tapping completes, in the time of withdrawing, because leave gap between screw tap knife bar and tool rest guide pin bushing, screw tap and workpiece can not interfere, thereby have greatly improved operating efficiency, reach the beneficial effect of rapid return, raising workpiece crudy.

Further improve as the utility model, the local milling of outer circumference surface of described screw tap knife bar is flat, in the corresponding position of described tool rest guide pin bushing, block is housed, and screw tap knife bar can only be axially moved and can not rotate.

Brief description of the drawings

Fig. 1 is the utility model chasing bar cross-sectional view;

Fig. 2 is A-A generalized section in Fig. 1.

Detailed description of the invention

Below in conjunction with accompanying drawing, the utility model is made and being further illustrated.

As shown in the figure, the utility model chasing bar comprises screw tap 1, holding screw 2, screw tap knife bar 3, turret lathe tool rest 5 and tool rest guide pin bushing 6, screw tap 1 is assembled with screw tap knife bar 3, fastening by holding screw 2, the screw tap cutter group assembling is inserted in the tool rest guide pin bushing 6 on turret lathe tool rest, screw tap knife bar 3 be matched in clearance with tool rest guide pin bushing 6, and as preferably, the outer circumference surface part milling of screw tap knife bar is flat, in the corresponding position of described tool rest guide pin bushing, block 4 is housed, it can only be moved axially can not rotate.

When work, machine tool chief axis rotates, and screw tap knife bar 3 is made the rectilinear motion of axial feed, and screw tap cuts on instrument, after tapping completes, machine tool chief axis reversion, screw tap knife bar 3 is along moving as withdrawing in the other direction, because screw tap knife bar 3 is matched in clearance with tool rest guide pin bushing, when screw tap exits from processing work, can not interfere with processing work, make the screw thread on processing work intact, also improve production efficiency simultaneously.

As preferably, the axial minimum range L between described block and screw tap knife bar boss should be greater than the degree of depth of workpiece to be processed screw thread, guarantees that screw tap exits completely from workpiece to be processed.

The description of above embodiment is comparatively concrete, detailed; but can not therefore be interpreted as the restriction to this patent scope; it should be noted that; for the person of ordinary skill of the art; without departing from the concept of the premise utility; can also make some distortion and improvement, these all belong to protection domain of the present utility model.

Claims

1. a chasing bar, comprises screw tap knife bar and tool rest guide pin bushing, it is characterized in that: described screw tap knife bar and described tool rest guide pin bushing are matched in clearance.

2. chasing bar according to claim 1, is characterized in that: the local milling of outer circumference surface of described screw tap knife bar is flat, in the corresponding position of described tool rest guide pin bushing, block is housed.

3. chasing bar according to claim 2, is characterized in that: the axial minimum range between described block and screw tap knife bar boss is greater than the degree of depth of workpiece to be processed screw thread.