CN211889321U

CN211889321U - Screw tap for sheet metal processing

Info

Publication number: CN211889321U
Application number: CN202020504850.6U
Authority: CN
Inventors: 区传森; 区传彬
Original assignee: Dongguan Yize Precision Cutting Tools Co ltd
Current assignee: Dongguan Yize Precision Cutting Tools Co ltd
Priority date: 2020-04-08
Filing date: 2020-04-08
Publication date: 2020-11-10
Anticipated expiration: 2030-04-08

Abstract

The utility model discloses a screw tap for panel beating, including stalk portion and the cutting part that connects gradually, the length LA of stalk portion and the length LB of cutting part satisfy following condition: LA is more than or equal to 13 mm and less than or equal to 17 mm, LB is more than or equal to 7 mm and less than or equal to 9 mm; the handle part is respectively provided with a circumferential limiting structure and an axial limiting structure; the axial limiting structure is a lug protruding out of the outer surface of the handle part or a groove formed in the outer surface of the handle part. By shortening the handle part, compared with the prior art, the handle part has better coaxiality relative to the blade part, and the shaking is greatly reduced; by shortening the edge part, the time for manufacturing the screw tap can be shortened, the production efficiency of the screw tap is improved, and precious metal materials can be saved; through setting up lug or recess for the axial of screw tap is spacing, avoids the axial origin of screw tap to change, thereby avoids being damaged by processing part and screw tap.

Description

Screw tap for sheet metal processing

Technical Field

The utility model belongs to the technical field of the metalworking cutter, concretely relates to screw tap for panel beating.

Background

The tap is a tool for machining internal threads. At present, the specification of the screw tap is standardized, the blade part and the handle part of the standardized screw tap are both longer, and the blade part is not required to be very long for parts with thinner thickness, such as sheet metal and the like; the handle part is longer, so that the coaxiality of the handle part relative to the blade part is poorer, the vibration is larger during processing, and the vibration is more increased because the sheet metal part is usually made of materials with higher hardness, such as stainless steel and the like; secondly, the standard screw tap is clamped by the elastic chuck, the axial displacement of the standard screw tap is limited by the friction force between the elastic chuck and the handle, and when a material with high hardness such as stainless steel is machined, the screw tap can loosen, so that the axial origin of the screw tap is changed, and the machined part and the screw tap are easily damaged.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems that the standard screw tap in the prior art has large shake during machining and the axial displacement is limited by friction force, the utility model aims at providing a screw tap for sheet metal machining, which shortens the handle part, and compared with the prior art, the coaxiality of the handle part relative to the cutting part is better, and the shake is greatly reduced; by shortening the edge part, the time for manufacturing the screw tap can be shortened, the production efficiency of the screw tap is improved, and precious metal materials can be saved; through setting up lug or recess for the axial of screw tap is spacing, avoids the axial origin of screw tap to change, thereby avoids being damaged by processing part and screw tap.

The utility model discloses the technical scheme who adopts does:

the screw tap for the sheet metal working comprises a handle part and a cutting part which are connected in sequence, wherein the length LA of the handle part and the length LB of the cutting part meet the following conditions: LA is more than or equal to 13 mm and less than or equal to 17 mm, LB is more than or equal to 7 mm and less than or equal to 9 mm; the handle part is respectively provided with a circumferential limiting structure and an axial limiting structure; the axial limiting structure is a lug protruding out of the outer surface of the handle part or a groove formed in the outer surface of the handle part.

As a further alternative of the tap for sheet metal working, the length LA =15.7 mm of the shank.

As a further alternative of the sheet metal working tap, the length LB of the blade portion =8 mm.

As a further alternative of the sheet metal working screw tap, the axial limiting structure is an annular groove formed in the outer surface of the handle.

As a further alternative of the sheet metal working screw tap, the cross section of the annular groove is V-shaped.

As a further alternative of the tap for sheet metal working, an included angle of the V-shape is 120 °.

As a further alternative of the screw tap for sheet metal working, the circumferential limiting structures are two planes which are both arranged on the handle part; the two planes are oppositely arranged.

The utility model has the advantages that:

by shortening the handle part, compared with the prior art, the handle part has better coaxiality relative to the blade part, and the shaking is greatly reduced; by shortening the edge part, the time for manufacturing the screw tap can be shortened, the production efficiency of the screw tap is improved, and precious metal materials can be saved; through setting up lug or recess, realize the axial of screw tap spacing, avoid the axial initial point of screw tap to change to avoid being damaged by processing part and screw tap.

Other advantageous effects of the present invention will be described in detail in the detailed description of the invention.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings required for the description of the embodiments will be briefly introduced below, it should be understood that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a tap for sheet metal working according to a first embodiment;

FIG. 2 is a top view of FIG. 1;

fig. 3 is a schematic structural view of a sheet metal working tap according to a second embodiment;

fig. 4 is a schematic structural view of a tap for sheet metal working according to a third embodiment;

fig. 5 is a schematic structural view of a sheet metal working tap according to a fourth embodiment.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention. It is to be understood that the drawings are designed solely for the purposes of illustration and description and not as a definition of the limits of the invention. The connection relationships shown in the drawings are for clarity of description only and do not limit the manner of connection.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

The first embodiment is as follows:

as shown in fig. 1 and 2, the tap for sheet metal working according to the present embodiment includes a shank 1 and a blade 2 connected in series, and the length LA of the shank 1 and the length LB of the blade 2 satisfy the following conditions: LA is more than or equal to 13 mm and less than or equal to 17 mm, LB is more than or equal to 7 mm and less than or equal to 9 mm; the handle part 1 is respectively provided with a circumferential limiting structure 11 and an axial limiting structure 12; the axial limiting structure 12 is an annular groove formed on the outer circular surface of the handle 1.

The thickness of the sheet metal is generally 2mm-3mm and not more than 5mm, so that the length LB of the blade part 2 can meet the production requirements of most sheet metal parts. The sheet metal part is made of stainless steel generally, and the hardness of the sheet metal part is higher, so that the blade part 2 is made of hard alloy generally, the length LB of the blade part 2 is shortened, the consumption of the hard alloy can be reduced, and the cost is saved; secondly, the length LB of the blade part 2 is shortened, so that the processing time of the screw tap can be reduced, and the production efficiency can be improved.

The length LA of the handle part 1 is shortened, so that the coaxiality of the handle part 1 relative to the blade part 2 is better, the vibration generated during processing is reduced, and the processing quality is improved.

The circumferential limiting structure 11 can be implemented by using existing structures such as keys, and in the embodiment, as shown in fig. 1 and 2, the circumferential limiting structure 11 is two planes which are both arranged on the handle part 1; the two planes are oppositely arranged.

The axial displacement of the tap in this embodiment can be limited by providing a protrusion on the chuck (not shown) against the side wall of the annular groove, thereby avoiding the axial play of the tap, which may cause the axial origin of the tap to shift and damage the machined part or the tap. The axial origin of the tap means a relative position of the tap with respect to a reference object which is relatively stationary after the tap is mounted in a tapping apparatus (not shown).

In this embodiment, as shown in fig. 1, the cross section of the annular groove is V-shaped, on one hand, the side wall of the annular groove is inclined relative to the vertical surface, so that no gap exists between the convex object and the annular groove; on the other hand, less material is removed, avoiding an excessive reduction in the strength of the shank 1.

In this embodiment, as shown in fig. 1, the included angle of the V-shape is 120 °.

In the present embodiment, the length LA =15.7 mm of the shank 1 and the length LB =8 mm of the blade 2.

Example two:

as shown in fig. 3, the present embodiment is different from the first embodiment in that the axial limiting structure 12 in the present embodiment is an annular rib sleeved outside the handle 1, and the annular rib is integrally formed with the handle 1. The axial displacement of the tap in this embodiment is limited by providing an annular groove in the collet (not shown) that mates with the annular ridge.

Example three:

as shown in fig. 4, the present embodiment is different from the first embodiment in that the axial limiting structure 12 in the present embodiment is a blind hole formed on the handle 1. The axial displacement of the tap in this embodiment is limited by providing a pin in the chuck (not shown) that fits into the blind hole.

Example four:

as shown in fig. 5, the present embodiment is different from the first embodiment in that the axial limiting structure 12 in the present embodiment is a protrusion protruding out of the handle 1, and the protrusion is integrally formed with the handle 1. The axial displacement of the tap in this embodiment is limited by providing a socket in the collet (not shown) that mates with the projection.

The clamping structure of the utility model can be provided with a component without a standard elastic chuck, the component is provided with a matching hole matched with the handle part 1, and the hole bottom of the matching hole is provided with a square hole matched with the circumferential limiting structure 11; the hole wall of the matching hole is provided with a convex object, such as a screw, matched with the annular groove or the blind hole; or the matching hole is provided with a groove matched with the annular convex rib or the convex block.

The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.

Claims

1. Screw tap for panel beating, including stalk portion and the cutting part that connects gradually, its characterized in that: the length LA of the handle part and the length LB of the blade part meet the following conditions: LA is more than or equal to 13 mm and less than or equal to 17 mm, LB is more than or equal to 7 mm and less than or equal to 9 mm; the handle part is respectively provided with a circumferential limiting structure and an axial limiting structure; the axial limiting structure is a lug protruding out of the outer surface of the handle part or a groove formed in the outer surface of the handle part.

2. The tap for sheet metal working according to claim 1, wherein: the length of the handle LA =15.7 mm.

3. The tap for sheet metal working according to claim 1, wherein: the length LB =8 mm of the blade part.

4. The tap for sheet metal working according to claim 1, wherein: the axial limiting structure is an annular groove formed in the outer surface of the handle.

5. The tap for sheet metal working according to claim 4, wherein: the cross section of the annular groove is V-shaped.

6. The tap for sheet metal working according to claim 5, wherein: the included angle of the V-shaped structure is 120 degrees.

7. The tap for sheet metal working according to claim 1, wherein: the circumferential limiting structures are two planes which are arranged on the handle part; the two planes are oppositely arranged.