CN200970661Y

CN200970661Y - Tapping lengthening sleeve

Info

Publication number: CN200970661Y
Application number: CN 200620099716
Authority: CN
Inventors: 刘著界; 农建军; 韦顺德
Original assignee: China Non-Ferrous Metal Industry Eleventh Metallurgical Installation Engineering
Current assignee: China Non-Ferrous Metal Industry Eleventh Metallurgical Installation Engineering
Priority date: 2006-10-26
Filing date: 2006-10-26
Publication date: 2007-11-07
Anticipated expiration: 2016-10-26

Abstract

A tap lengthening set--a mechanical processing fitting part, consists of a set of a connecting rod (2), a stalk head (3) and a looping (1). The connecting rod (2) is a long cylindrical steel rod, and the stalk head (3) is above the connecting rod (2); said stalk head (3) is a column with a square cross-section. The looping (1) is in the inner part at the bottom of connecting rod (2); said looping (1) is a square blind hole, with 2 to 4 degree taper. Auxiliary with normal tap, the tap lengthening set can solve the problem to process the bottom of deep concave workpieces or special deep workpieces with small inlets.

Description

Screw tap lengthening cover

Technical field:

The utility model relates to a kind of machinery tools accessory, the particularly a kind of and matching used lengthening cover of screw tap.

Background technology:

Common its length of screw tap that is used for the different size of tapping all has fixed dimension, when carrying out tapping or the dark and narrower and small special workpiece of import of depth is carried out tapping adding man-hour to the hole of spill workpiece bottom, screw tap often can not arrive working position, though or arrival but can not enter working position fully, cause trouble and difficulty for the processing of this type of workpiece, therefore have to adopt other special equipment.

The utility model content:

The technical problems to be solved in the utility model is: provide a kind of can with the matching used screw tap of the screw tap of routine lengthening cover, need not to adopt special equipment can solve that top described the narrower and small special workpiece of import carries out the problem of tapping processing to darker spill workpiece bottom or to depth is dark.

The technical scheme that solves the problems of the technologies described above is: a kind of screw tap lengthening cover, be to constitute by loop bar that fuses and button, loop bar is an oval column steel pole, the top of loop bar is a button, described button is that a cross section is square column, the lower inner of loop bar has running-on, and described running-on is a square blind hole, has 2～4 ° of taperings.

The screw tap lengthening nested structure of the utility model is simple, easy to use, the narrower and small special workpiece of import carries out tapping processing and when using general screw tap not arrive working position when need be to darker spill workpiece bottom or to depth is dark, as long as the button of screw tap is packed into running-on, the locking of the screw tap lengthening cover of the utility model, then the button of screw tap lengthening cover is injected the chuck clamping of the wired bar of rig, promptly can carry out tapping processing, need not to use special equipment, this screw tap lengthening cover is manufactured easily in addition, cost is low, economical and practical.

Below, the technical characterictic to the screw tap of the utility model lengthening cover is further described in conjunction with the accompanying drawings and embodiments.

Description of drawings:

Fig. 1～Fig. 3: the screw tap lengthening nested structure schematic diagram of the utility model:

The A-A cutaway view of Fig. 1: Fig. 2, Fig. 2: front view (partly cuing open),

The B of Fig. 3: Fig. 2 is to view;

Fig. 4～Fig. 5: screw tap lengthening cover is installed, working state schematic representation:

Fig. 4: screw tap lengthening cover and screw tap cooperating state,

Fig. 5: screw tap lengthening cover and screw tap exit status from workpiece.

Among the figure:

The 1-running-on, 2-loop bar, 3-button, 4-screw tap lengthening cover, 5-work piece, 6-screw tap.

The specific embodiment:

A kind of screw tap lengthening cover, comprise the loop bar 2 and the button 3 that fuse, loop bar 2 is oval column steel poles, the top of loop bar is a button 3, described button 3 is that a cross section is square column, and the lower inner of loop bar has running-on 1, and described running-on 1 is a square blind hole, have 2～4 ° of taperings, this blind hole dimension series is consistent with the dimension series of standard screw tap button (referring to Fig. 1～Fig. 3).

According to the dimensional requirement of screw tap, select round steel for use with certain degree of hardness, get certain length, it is square short column button that the one end is processed into cross section, at one end processes a square inner bore with 2～4 ° of taperings, promptly makes a screw tap lengthening cover.Can certainly process the loop bar with the square inner bore of 2～4 ° of taperings earlier, be that square short column button is welded and fused with cross section again.

This screw tap lengthening overlaps and is and the supporting use of common screw tap, thereby, can make the screw tap lengthening cover of different size size according to the different size of screw tap, form the screw tap lengthening and overlap series of products, use with convenient.For cross section is that the length of its loop bar also can have different specifications with a kind of screw tap of specification lengthening cover, and its concrete size is decided as required.

Claims

1, a kind of screw tap lengthening cover, it is characterized in that: this screw tap lengthening cover is to be made of loop bar that fuses (2) and button (3), loop bar (2) is an oval column steel pole, the top of loop bar is button (3), described button (3) is that a cross section is square column, the lower inner of loop bar has running-on (1), and described running-on (1) is a square blind hole.

2, screw tap lengthening cover according to claim 1, it is characterized in that: the square inner bore of described running-on (1) has 2～4 ° of taperings.