CN212470093U

CN212470093U - Spiral flute tap with gradually-increased thread width

Info

Publication number: CN212470093U
Application number: CN202021486183.XU
Authority: CN
Inventors: 徐和平; 陈伦; 何刚
Original assignee: Chengdu Xincheng Tools Co ltd
Current assignee: Chengdu Xincheng Tools Co ltd
Priority date: 2020-03-05
Filing date: 2020-07-24
Publication date: 2021-02-05
Anticipated expiration: 2030-07-24
Also published as: CN111745234A

Abstract

The utility model discloses a gradual increase helicla flute screw tap of tooth width, include: the cutting edge part, the clamping part and the cutting cone; the front end of the edge part is provided with a cutting cone, the edge part comprises a cutting edge zone and a groove, the cutting edge zone comprises a cutting part and a correcting part, the number of the cutting edge zone is the same as that of the groove, the cutting edge zone and the groove are distributed at intervals, and the cutting edge zone is in a forward cone shape from front to back. The problem of the internal thread quality that the tap was processed out on the lathe that machining precision is not high such as rocking arm brill, vertical drill, bench drill is not high is solved, the only end can not live when detecting with the screw plug gauge is solved, improved tap tapping quality, when using the plug gauge to detect the internal thread that has processed, can satisfy the requirement of leading to the only end, improved the qualification rate of product.

Description

Spiral flute tap with gradually-increased thread width

Technical Field

The utility model relates to a cutting tool technical field, concretely relates to screw tap.

Background

A spiral fluted tap is often used in the processing of a blind hole with an internal thread, and the corrected portion of the cutting edge is substantially uniform in width from front to back after the conventional spiral fluted tap is manufactured.

The internal thread that the screw tap processed out can use the screw plug gauge to detect, because current a lot of producers can appear the screw tap and rock in using lathe that machining precision is not high such as rocking arm drill, vertical drill, bench drill, the course of working, and spiral flute screw tap itself can receive a decurrent pulling force when adding man-hour and lead to the screw hole to cut excessively, and the internal thread that uses present screw tap processing to come out often can not reach the required precision, the nonconforming phenomenon that the end stop can not live when the inspection of screw plug gauge appears.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a gradual increase helicla flute screw tap of tooth width solves the internal thread that ordinary screw tap processed out on the lathe that machining precision is not high such as rocking arm is bored, is bored immediately, bench drill and can appear ending the problem that can not live, and the internal thread that makes the processing out leads to ending qualified and the precision is higher, improves screw tap tapping quality.

In order to achieve the above object, the utility model provides a gradual increase helicla flute tap of tooth width which characterized in that includes: a blade part and a clamping part; the front part of the blade part is a cutting cone, and the rear part of the blade part is a correcting part; the cutting edge part comprises cutting edge zones and grooves, the number of the cutting edge zones is the same as that of the grooves, the cutting edge zones and the grooves are distributed at intervals, and the cutting edge zones are in a forward conical shape from front to back.

Preferably, the taper of the positive cone is 0.05-0.4.

Preferably, there are at least two of each of said cutting lands and grooves.

Furthermore, each cutting edge is the same, each groove is the same, and the cutting edges and the grooves are uniformly distributed on the edge part at intervals.

Preferably, the blade portion and the clamping portion are integral.

Furthermore, the tail end of the clamping part is provided with a square tail.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. on a machine tool with low processing precision, such as a rocker arm drill, a vertical drill, a bench drill and the like, the internal thread processed by the utility model can reach qualified communication and stop and higher precision;

2. the tapping quality of the tap is improved.

Drawings

FIG. 1 is a schematic structural view of the spiral fluted tap of the present invention;

FIG. 2 is a schematic view of a conventional spiral fluted tap;

in the figure: 1-blade part, 2-cutting cone, 3-cutting blade zone, 4-groove and 5-clamping part.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings.

The utility model discloses a gradual increase helicla flute screw tap of tooth width, a serial communication port, include: a blade part 1 and a clamping part 5; the front part of the blade part 1 is a cutting cone 2, and the rear part is a correction part; the edge part 1 comprises cutting blade zones 3 and grooves 4, the number of the cutting blade zones 3 is the same as that of the grooves 4, the cutting blade zones 3 and the grooves 4 are distributed at intervals, and the cutting blade zones 3 are in a forward conical shape from front to back.

Preferably, the taper of the positive cone is 0.05-0.4.

Preferably, there are at least two of each of the cutting lands 3 and flutes 4.

Further, the cutting blade zones 3 are all the same, the grooves 5 are all the same, and the cutting blade zones 3 and the grooves 5 are uniformly distributed on the blade part 1 at intervals.

Preferably, the blade 1 and the holder 5 are integral.

Furthermore, the tail end of the clamping part 5 is provided with a square tail.

As shown in figures 1 and 2, the front and back widths of the cutting edge of the cutting correction part of the tap of the invention are different, the cutting edge is in a forward conical shape from front to back, A2 is more than A1,

the value of (A) is 0.05-0.4, while the A1 and A2 of the conventional spiral fluted tap have no significant difference.

Use the utility model discloses a helicla flute screw tap carries out the tapping, can carry out synchronous tapping on machining center or digit control machine tool, also can be used to carry out asynchronous tapping and process out qualified internal thread on the ordinary machine tool.

Because the width of the cutting edge zone 3 of the spiral fluted tap is gradually increased from front to back, namely the cutting edge zone 3 is in a forward cone shape, the forward cone enables the stress of the spiral fluted tap to be upward, downward pulling force received by the spiral fluted tap in the processing process is balanced, thereby avoiding the internal thread over-cutting of the tap, solving the problem that the internal thread dead end processed by the common spiral fluted tap cannot be stopped, improving the tapping quality of the spiral fluted tap, and when the internal thread processed by using a plug gauge is detected, the requirement of the passing-through dead end can be met, and the qualification rate of products is improved.

Of course, the present invention may have other embodiments, and those skilled in the art may make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, and these corresponding changes and modifications should fall within the protection scope of the appended claims.

Claims

1. A spiral fluted tap with an increasing thread width, comprising: a blade part (1) and a clamping part (5); the front part of the blade part (1) is a cutting cone (2), and the rear part of the blade part is a correcting part; the cutting edge part (1) comprises cutting edge zones (3) and grooves (4), the number of the cutting edge zones (3) is the same as that of the grooves (4), the cutting edge zones (3) and the grooves (4) are distributed at intervals, and the cutting edge zones (3) are in a forward conical shape from front to back.

2. A spiral fluted tap according to claim 1, wherein the thread width is gradually increased: the taper of the positive cone is 0.05-0.4.

3. A spiral fluted tap according to claim 1, wherein the thread width is gradually increased: at least two cutting blade zones (3) and at least two grooves (4) are arranged.

4. A spiral fluted tap according to claim 1, wherein the thread width is gradually increased: the cutting edge zones (3) are all the same, the grooves (4) are all the same, and the cutting edge zones (3) and the grooves (4) are uniformly distributed on the blade part (1) at intervals.

5. A spiral fluted tap according to claim 1, wherein the thread width is gradually increased: the blade part (1) and the clamping part (5) are integrated.

6. A spiral fluted tap according to claim 1 or 5, wherein: the tail end of the clamping part (5) is provided with a square tail.