CN202845970U

CN202845970U - Hard alloy screw tap

Info

Publication number: CN202845970U
Application number: CN 201220503060
Authority: CN
Inventors: 李志芬
Original assignee: CHANGZHOU NAIZHILI TOOLMAKING Co Ltd
Current assignee: CHANGZHOU NAIZHILI TOOLMAKING Co Ltd
Priority date: 2012-09-27
Filing date: 2012-09-27
Publication date: 2013-04-03
Anticipated expiration: 2022-09-27

Abstract

The utility model relates to a cutting tool used in machining, in particular to a hard alloy screw tap. The hard alloy screw tap comprises a cutter handle body and a tapping part which is arranged at one end of the cutter handle body. The tapping part comprises a plurality of tapping threads. A straight line chip removal groove is arranged between each two adjacent tapping threads and arranged along axis direction of the cutter handle body. The front end of the tapping part is a cone-shaped body. The conical degree alpha of the cone-shaped body is 40 degrees to 50 degrees. Due to the fact that conical degree of the cone-shaped body is designed to be 40 degrees to 50 degrees, when the screw tap is used for tapping, the center of the hole to be machined can easily and accurately found. Along with the gradually increasing of the diameter of the cone-shaped body, the large-diameter part of the cone-shaped body can form a certain bearing force to the screw tap, so that the screw tap can easily and stably enter the to-be-tapped hole and stable tapping is stably carried out. Metal filing produced in a tapping process can be smoothly discharged from the straight line chip removal grooves. The hard alloy screw tap can guarantee the tapping precision, and products with high percent of pass can be tapped out.

Description

Tungsten carbide tap

Technical field

The utility model relates to the cutter that uses in the machining, is specifically related to a kind of tungsten carbide tap.

Background technology

In machining, when adopting screw tap to carry out tapping, the front end of screw tap need to enter to be threaded in the hole and position, guarantee accurate positioning with this, the existing employing is arranged to cone shape at the front end of screw tap, but since the angle of centrum arrange when excessive or too small, all be not easy the center of finding accurately, the unsettled phenomenon of normal appearance, thus the yarn quality of tapping reduces, even can cause scrapping of product.

Summary of the invention

For above-mentioned technical problem, the utility model provides a kind of tungsten carbide tap, and it can find the center of tapping easily accurately, and tapping is stable, guarantees Tapping Quality.

The realization the technical solution of the utility model is as follows:

Tungsten carbide tap, comprise the handle of a knife body, be arranged on the tapping section of handle of a knife body one end, described tapping section comprises a plurality of tapping threads, between adjacent tapping thread, be provided with the straight line chip area of arranging along handle of a knife body axis direction, the front end of described tapping section is bullet, and the tapering α of bullet is 40 °-50 °.

The pitch of described tapping thread is 1.25mm-2mm.

The external diameter of described tapping section is greater than the external diameter of handle of a knife body.When tapping depth surpassed the length of tapping section, the handle of a knife body entered and is threaded in the hole, can not be sprayed onto hole wall, guaranteed the normal operation of tapping.

Adopted such scheme, the tapering of bullet is arranged to 40 °-50 °, when screw tap carries out tapping, can find easily the center in processed hole accurately by bullet, along with the gradually increase of bullet diameter, the large diameter portion of bullet can form to screw tap the gesture of certain supporting, like this when tapping, screw tap just can be stable enter and be threaded in the hole, and stable carry out tapping; The metal fillings that produces in the tapping process can be discharged from the straight line chip area smoothly.The utility model can be guaranteed the precision of tapping, the product that the tapping qualification rate is high.

Description of drawings

Fig. 1 is structural representation of the present utility model;

Among the figure, 1 is the handle of a knife body, and 2 are tapping section, and 3 is tapping thread, and 4 is the straight line chip area, and 5 is bullet.

The specific embodiment

Below in conjunction with the drawings and specific embodiments the utility model is further specified.

Referring to Fig. 1, tungsten carbide tap comprises handle of a knife body 1, is arranged on the tapping section 2 of handle of a knife body one end, and the external diameter of tapping section is greater than the external diameter of handle of a knife body; Tapping section comprises a plurality of tapping threads 3, between adjacent tapping thread, be provided with the straight line chip area 4 of arranging along handle of a knife body axis direction, the front end of tapping section is bullet 5, the tapering α of bullet is 40 °-50 °, in the implementation, tapering α can be 40 °, 41 °, 42 °, 43 °, 44 °, 45 °, 46 °, 47 °, 48 °, 49 °, 50 °.

Wherein, the pitch of tapping thread is 1.25mm-2mm, and according to the needs of different screw threads, pitch can be 1.25mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm.

Claims

1. tungsten carbide tap, comprise the handle of a knife body, be arranged on the tapping section of handle of a knife body one end, it is characterized in that: described tapping section comprises a plurality of tapping threads, between adjacent tapping thread, be provided with the straight line chip area of arranging along handle of a knife body axis direction, the front end of described tapping section is bullet, and the tapering α of bullet is 40 °-50 °.

2. tungsten carbide tap according to claim 1, it is characterized in that: the pitch of described tapping thread is 1.25mm-2mm.

3. tungsten carbide tap according to claim 1 is characterized in that: the external diameter of described tapping section is greater than the external diameter of handle of a knife body.