CN216541263U

CN216541263U - Extrusion screw tap

Info

Publication number: CN216541263U
Application number: CN202122918333.0U
Authority: CN
Inventors: 彭展里
Original assignee: Guiyang Ruixin Machining Co ltd
Current assignee: Guiyang Ruixin Machining Co ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-05-17
Anticipated expiration: 2031-11-25

Abstract

The utility model provides an extrusion screw tap which comprises a tapping part, a connecting part, a tool shank and a clamping handle, wherein the tapping part is arranged on the connecting part; tapping portion, connecting portion, handle of a knife, centre gripping handle connect gradually, the end processing of tapping portion has the edge of a knife that expands, expands and process on the outer wall of edge of a knife and tapping portion for continuous screw thread, expand the edge of a knife for the round platform type, the big diameter end that expands the edge of a knife is the same with the minimum diameter of tapping portion and is connected with tapping portion, the little diameter end that expands the edge of a knife is the same with location head bottom diameter, and the location head is conical, and location head lateral wall inclination is less than the inclination that expands the edge of a knife lateral wall. According to the utility model, the positioning tool bit is used for reaming the blind hole to be processed into the smooth inner wall, and the deformation times generated by extruding the workpiece when the reaming edge is cut in are reduced, so that the smooth thread is obtained.

Description

Extrusion screw tap

Technical Field

The present invention relates to an extrusion tap.

Background

Threaded fasteners are used on almost all mechanical devices, and therefore, threaded coupling technology is one of the most important technologies to ensure reliability of mechanical systems. The manufacturing quality of the threaded fastener is the most important guarantee of the reliability of a mechanical system, the internal thread blind hole tapping is generally carried out by adopting a common cutting tap, metal scraps are difficult to clean due to the fact that the common cutting tap can leave metal scraps in the blind hole, and particularly, internal threads with M being less than or equal to 6 or MJ being less than or equal to 6 are more difficult to clean after cutting.

The extrusion tapping is to form internal threads by a method of deforming a preformed hole extruded by a screw tap, metal chips are not generated in the processing process, the processed internal threads are higher in precision, small in roughness, continuous in metal flow line and longer in fatigue life of a workpiece.

Extrusion tapping mainly makes the blind hole inner wall shape change at the blind hole internal rotation through the screw tap, and present screw tap makes the work piece produce deformation many times in the twinkling of an eye easily, influences the surface smoothness of work piece, is as disclosing the number: CN213104273U discloses a four-line thread pressing tap, wherein four cutting edge access points are arranged at the top end of the pressing part, and four parallel thread cutting edges are arranged on the four access points, although the machining lead is increased, the four thread cutting edges will deform the inside of the blind hole for many times in the lead process, which affects the flatness of the workpiece. For example, publication numbers are: CN 104107966A's a four arris extrusion tap, it sets up the extrusion tap part as the rough machining part for the taper type, if there is the blank that the blind hole is too little, its tap also can produce deformation extrusion many times to the blind hole inside, is unfavorable for the level and smooth of work piece.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an extrusion tap.

The utility model is realized by the following technical scheme.

The utility model provides an extrusion tap which comprises a tapping part, a connecting part, a tool shank and a clamping handle; tapping portion, connecting portion, handle of a knife, centre gripping handle connect gradually, the end processing of tapping portion has the edge of a knife that expands, and processing is continuous screw thread on the outer wall of the edge of a knife and tapping portion, expand the edge of a knife and be the round platform type, expand the edge of a knife and be connected with tapping portion smooth transition, the minor diameter end that expands the edge of a knife is the same with location head bottom diameter, and the location head is conical, and location head lateral wall inclination is less than the inclination that expands the edge of a knife lateral wall.

The connecting portion comprises two round tables with different sizes, one ends of the two round tables are connected in a mode that the same diameter is formed, and the other ends of the two round tables are connected with the tapping portion and the cutter handle respectively in a mode that the diameters of the tapping portion and the cutter handle are the same.

The diameter of the tapping part is smaller than that of the cutter handle, and the height of the round table connected with the tapping part is larger than that of the round table connected with the cutter handle.

The tapping part is also provided with a plurality of diamond edges.

The clamping handle is rectangular.

And a TIN coating is arranged on the surface of the tap.

The utility model has the beneficial effects that: the blind hole to be processed is reamed into a smooth inner wall through the positioning cutter head, and the deformation times generated by extruding the workpiece when the reamer is cut in are reduced, so that a smooth thread is obtained.

Drawings

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

FIG. 2 is a schematic view of the structure of the tapping portion of the present invention;

FIG. 3 is a schematic view of the clamp shank configuration of the present invention;

in the figure: 1-positioning head, 2-expanding knife edge, 3-tapping part, 4-connecting part, 5-knife handle and 6-clamping handle.

Detailed Description

The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.

An extrusion tap comprises a tapping part 3, a connecting part 4, a tool shank 5 and a clamping shank 6; tapping portion 3, connecting portion 4, handle of a knife 5, centre gripping handle 6 connect gradually, the end processing of tapping portion 3 has the edge of a knife 2 that expands, expands and to process for continuous screw thread on the outer wall of edge of a knife 2 and tapping portion 3, the edge of a knife 2 is the round platform type, expands the edge of a knife and is connected with tapping portion smooth transition, and the big diameter end that expands edge of a knife 2 is the same with tapping portion 3's minimum diameter and is connected and expand the continuous smooth connection of screw thread on the edge of a knife and the tapping portion with tapping portion 3, the little diameter end that expands edge of a knife 2 is the same with location head 1 bottom diameter, and location head 1 is conical, and location head 1 lateral wall inclination is less than the inclination that expands edge of a knife 2 lateral walls. The blind hole to be processed is reamed into a smooth inner wall through the positioning cutter head, and the deformation times generated by extruding the workpiece when the reamer is cut in are reduced, so that a smooth thread is obtained.

The connecting portion 4 comprises two round platforms with different sizes, one ends of the two round platforms have the same diameter and are connected, and the other ends of the two round platforms are respectively connected with the tapping portion 3 and the cutter handle 5 with the same diameter. The two round tables are in transition between the threaded end and the handle, so that the tangential force transmitted by the threaded end can be relieved.

The diameter of the tapping part 3 is smaller than that of the tool shank 5, and the height of the circular truncated cone connected with the tapping part 3 is larger than that of the circular truncated cone connected with the tool shank 5. Through round platform structural connection between tapping portion and the handle of a knife, when the tangential force of tapping portion was transmitted to the handle of a knife, the characteristic handle of a knife that utilizes the round platform can carry out better support to the tapping portion, prevents that the screw tap fracture.

The tapping part 3 is also provided with a plurality of diamond edges. In the actual use process, the three-corner diamond type LED lamp is generally a triangular circular diamond type and a four-corner circular diamond type. The triangular round rhombuses are mainly used for common thread processing, and the four-corner round rhombuses are used for reinforcing thread processing.

The clamping handle 6 is rectangular.

And a TIN coating is arranged on the surface of the tap. The titanium nitride coating can enhance the surface strength of the screw tap, slow down the wear consumption of the screw tap and better prolong the fatigue life of the screw tap.

Claims

1. The utility model provides an extrusion tap, includes tapping portion (3), connecting portion (4), handle of a knife (5), centre gripping handle (6), its characterized in that: tapping portion (3), connecting portion (4), handle of a knife (5), centre gripping handle (6) connect gradually, the end processing of tapping portion (3) has and expands edge of a knife (2), expands and processes for continuous screw thread on the outer wall of edge of a knife (2) and tapping portion (3), it is the round platform type to expand edge of a knife (2), expands edge of a knife (2) and tapping portion (3) smooth transition and is connected, the small diameter end that expands edge of a knife (2) is the same with location head (1) bottom diameter, and location head (1) is conical, and location head (1) lateral wall inclination is less than the inclination that expands edge of a knife (2) lateral wall.

2. The extrusion tap according to claim 1, wherein: the connecting portion (4) comprises two round tables with different sizes, one ends of the two round tables are connected in a mode that the diameters of the two round tables are the same, and the other ends of the two round tables are connected with the tapping portion (3) and the cutter handle (5) respectively in a mode that the diameters of the two round tables are the same.

3. The extrusion tap according to claim 2, wherein: the diameter of the tapping part (3) is smaller than that of the tool shank (5), and the height of the circular truncated cone connected with the tapping part (3) is larger than that of the circular truncated cone connected with the tool shank (5).

4. The extrusion tap according to claim 1, wherein: the tapping part (3) is also provided with a plurality of diamond edges.

5. The extrusion tap according to claim 1, wherein: the clamping handle (6) is rectangular.

6. The extrusion tap according to claim 1, wherein: and a TIN coating is arranged on the surface of the tap.