Threading die structure of handheld threading machine

Abstract

The utility model discloses a threading die structure of a handheld die head threading machine. The threading die structure comprises a threading die base, the plurality of groups of screw die base bodies are annularly arranged on the screw die base, the working end parts of the screw die base bodies are arc-shaped, axially symmetrical cutting edge angles are formed at the two ends of the working end parts of the screw die base bodies, and meanwhile, a first end point and a second end point are formed at the end parts of the working end parts of the screw die base bodies; the rotating paths of the first end point and the second end point are the same during tapping and retreating, the optimized threading die has a front cutting edge angle in the tapping rotating direction, and a rear cutting edge angle is ground in the retreating rotating direction. In the thread retreating process, if the rear cutting edge angle makes contact with part of hindering materials or chipping fragments and the like, the hindering materials or chipping fragments and the like can be immediately removed from the sleeved threads, and therefore the whole threading head retreats smoothly.

Description

Technical Field

[0001] The present application relates to the field of mechanical processing technology, and in particular to a die structure of a handheld threading machine. Background Art

[0002] The electric threading machine is an upgraded and iterative tool that replaces the traditional manual threading method. The use of the electric threading machine can not only improve work efficiency but also reduce the labor intensity of workers. In particular, the handheld electric threading machine is very popular among the majority of plumbing installers because of its easy mobility and flexible operation.

[0003] For example, the patent document with announcement number CN219703737U proposed by the applicant proposes a threading head structure of a handheld threading machine, which can reduce the phenomenon of thread withdrawal and irregularity caused by the gap of the threading head.

[0004] However, the dies of these die structures are generally ground into a cutting angle at one end of the working end face, and the other end is directly ground into a chamfer. When tapping with this die structure, the cutting angle in front of the die can sharply cut off part of the material on the workpiece to form a thread, but when reversing and withdrawing, due to the instantaneous reversal of direction, the original matching state between the workpiece and the die may be changed, which will cause the rear end of the die to have new redundant contact with the workpiece material, making it difficult for the die to withdraw from the thread, and in severe cases, it may be completely blocked and cannot be withdrawn.

[0005] The above contents are only used to assist in understanding the technical solution of the present application, and do not constitute an admission that the above contents are the closest prior art to the present application. Summary of the invention

[0006] Based on this, the present application provides a die structure for a handheld threading machine to solve one of the above-mentioned technical problems.

[0007] The technical solution adopted by the present application to solve its technical problems is to include: a die seat; a die base, a plurality of die bases are arranged in a ring on the die seat, the working end of the die base is arranged in an arc shape, and the two ends of the working end of the die base form axially symmetrical cutting edge angles, and a first end point and a second end point are formed at its end; the first end point and the second end point have the same rotation path during tapping and backing out.

[0008] In some embodiments, the arc of the working end surface of the die base body remains tangent to the rotation path.

[0009] In some embodiments, the die holder includes a die cover, a positioning portion, and a die base. The positioning portion is installed on the die base in four equal parts of 360 degrees, and the die cover is arranged on the positioning portion.

[0010] In some embodiments, the die base is disposed on the positioning portion, and two sides of the die base are positioned by the positioning portion.

[0011] In some embodiments, the die cover is compressed and positioned on the positioning portion by screws.

[0012] In some embodiments, a portion of the die base is pressed and positioned by the die cover.

[0013] In some embodiments, the working end surface of the die base body is a multi-layer thread, and after all the die base bodies are installed, a smoothly connected spiral line can be formed between the different threads.

[0014] The beneficial effect of the present application is that the optimized tapping die not only has a front cutting edge angle in the tapping rotation direction, but also has a rear cutting edge angle ground in the threading rotation direction. During the threading process, if the rear cutting edge angle contacts some obstructing materials or chip fragments, they will be immediately removed from the already threaded threads, thereby allowing the entire threading head to be smoothly withdrawn. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a three-dimensional structural schematic diagram of this application.

[0017] Figure 2 It is a top view schematic diagram of the present application.

[0018] Figure 3 This is a top view of a traditional die.

[0019] Explanation of the accompanying figures: 1. Die seat; 11. Die cover; 12. Positioning part; 13. Die base; 2. Die matrix; 21. First endpoint; 22. Second endpoint; 23. Rotation path; 3. Screw. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to achieve. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that the combination of such technical solutions does not exist and is not within the scope of protection of this application.

[0021] In the embodiments of this application, please refer to Figure 1-3 As shown, the present application provides a die structure of a handheld threading machine, which mainly includes: a die seat 1; a die base 2, a plurality of which are arranged in a ring on the die seat 1, and the working end of the die base 2 is arranged in a circular arc shape, and an axially symmetrical cutting edge angle is formed at both ends of the working end of the die base 2, and a first endpoint 21 and a second endpoint 22 are formed at its end; the first endpoint 21 and the second endpoint 22 have the same rotation path 23 during tapping and threading.

[0022] Specifically, the die blocks are used in groups, and the die blocks are installed in the 360-degree four-equal-divided installation grooves of the die block seat 1. The die blocks are pressed and positioned axially with the die cover 11 and the screws 3, and are positioned circumferentially by the two sides of the installation grooves. After the die blocks are installed on the die block seat 1, they are installed on the threading machine, which drives the die block seat 1 to rotate. The group of die bases 2 on the die block seat 1 can cut out the required external threads, and finally the machine rotates in the opposite direction to withdraw. During the withdrawal process of the optimized die base 2, if the second end point 22 contacts some obstructing materials or cutting fragments, they will be immediately removed from the threaded threads that have been withdrawn, so that the entire threading head can be withdrawn smoothly.

[0023] Some preferred / improved embodiments based on the above embodiments will be described below. Any one of the following embodiments may be selected, or multiple embodiments may be selected and combined.

[0024] As an illustration, Figure 3 The traditional die structure shown in the figure has a front cutting edge angle only in the tapping rotation direction, and no cutting edge angle in the withdrawal rotation direction. Such a die can smoothly cut out threads, but when reversing and withdrawing, the matching state between the original workpiece and the die may be changed due to the instantaneous reversal of direction, which will cause the rear end of the die to have new redundant contact with the workpiece material and the chips generated during the previous tapping, making it difficult for the die to withdraw from the thread, and in severe cases, it may be completely blocked and unable to withdraw.

[0025] Specifically, in order to prevent the die base 2 from having unnecessary contact with the cutting part during the tooth removal process, the arc of the working end surface of the die base 2 is kept tangent to the rotation path 23 .

[0026] Reference Figure 1 As shown, the die seat 1 includes a die cover 11, a positioning portion 12, and a die base 13. The positioning portion 12 is installed on the die base 13 in four equal parts of 360 degrees, and the die cover 11 is arranged on the positioning portion 12. This arrangement can effectively optimize the force of each die base 2 and improve the service life of the die.

[0027] Specifically, in order to facilitate the installation and disassembly of the die base 2 , the die base 2 is arranged on the positioning portion 12 , and two sides of the die base 2 are positioned by the positioning portion 12 .

[0028] Preferably, in order to make the overall structure of the die base 13 more stable, the die cover 11 is pressed and positioned on the positioning portion 12 by means of screws 3 .

[0029] Reference Figure 2 As shown, in order to fix the die base 2 under the die cover 11, a part of the die base 2 is pressed and positioned by the die cover 11.

[0030] Specifically, in order to enable the die base 2 to perform complete tapping, the working end face of the die base 2 is a multi-layer thread, and after all the die bases 2 are installed, a smoothly connected spiral line can be formed between the different threads.

[0031] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present application, and the aforementioned embodiments are only used to illustrate the technical solution of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not drive the essence of the corresponding technical solutions away from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A die structure of a handheld threading machine, characterized in that: include: Die seat; A die base body is annularly arranged in multiple groups on the die seat, the working end of the die base body is arranged in an arc shape, the two ends of the working end of the die base body form axially symmetrical cutting edge angles, and a first end point and a second end point are formed at the end thereof; The first end point and the second end point have the same rotation path during tapping and during backing.

2. The die structure of a handheld threading machine according to claim 1, characterized in that: The circular arc of the working end surface of the die base body is kept tangent to the rotation path.

3. The die structure of a handheld threading machine according to claim 1, characterized in that: The die seat comprises a die cover, a positioning part, and a die base. The positioning part is installed on the die base in four equal parts of 360 degrees, and the die cover is arranged on the positioning part.

4. The die structure of a handheld threading machine according to claim 3, characterized in that: The die base is arranged on the positioning portion, and two sides of the die base are positioned by the positioning portion.

5. The die structure of a handheld threading machine according to claim 3, characterized in that: The die cover is compressed and positioned on the positioning portion by means of screws.

6. The die structure of a handheld threading machine according to claim 3, characterized in that: A portion of the die base is pressed and positioned by the die cover.

7. The die structure of a handheld threading machine according to claim 1, characterized in that: The working end surface of the die base body is a multi-layer thread. After all the die base bodies are installed, a smoothly connected spiral line can be formed between the different thread teeth.

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