Reusable multi-blade extrusion tap

Abstract

The utility model provides a reusable multi-edge extrusion tap, which comprises a handle part and a cutting part which are connected with each other, the cutting part comprises a plurality of cutting units, each cutting unit comprises a cutting edge and a correction edge which are sequentially arranged along the direction of the cutting part pointing to the handle part, and every two adjacent cutting units are arranged at intervals. The reusable multi-blade extrusion tap is simple and ingenious in structural design, and the overall service life of the extrusion tap can be effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of tap tools, and more specifically, to a reusable multi-edge extrusion tap. Background Art

[0002] Traditional extrusion taps all include a shank and a cutting part, and the cutting part has one and only one cutting edge and a finishing edge; the cutting edge includes a plurality of cutting pieces, and the finishing edge includes a plurality of finishing edges. The diameter of each cutting piece gradually increases in the direction from the cutting part to the shank until it is the same as the diameter of the finishing edge. During the cutting process, drilling is performed through the cutting pieces, and then the subsequent thread holes are cut to the same radius through the finishing edge to realize the tapping process.

[0003] However, the overall service life of the extrusion tap with this structure is relatively short. Once the cutting pieces at the head are damaged or worn, on the one hand, it is very difficult to ensure the cutting accuracy and cutting efficiency, affecting the processing effect; on the other hand, the whole tap needs to be scrapped, and the service life of the finishing edge cannot be fully utilized, resulting in a great waste of resources.

[0004] In view of this, the applicant has proposed a reusable multi-edge extrusion tap with a simple and ingenious structural design that can effectively improve the overall service life of the extrusion tap. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a reusable multi-edge extrusion tap with a simple and ingenious structural design that can effectively improve the overall service life of the extrusion tap.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A reusable multi-edge extrusion tap includes a shank and a cutting part connected to each other. The cutting part includes a plurality of cutting units, and each cutting unit includes a cutting edge and a finishing edge arranged in sequence in the direction from the cutting part to the shank, and there is an interval between every two adjacent cutting units.

[0008] As a further improvement, the number of the cutting units is two.

[0009] As a further improvement, the distance between the two cutting units ranges from 0.5 to 2 mm.

[0010] As a further improvement, the ratio of the length of the finishing edge of the cutting unit far from the shank to the length of the finishing edge of the other cutting unit is 0.3 to 0.7.

[0011] As a further improvement, a plurality of the cutting units are concentrically arranged and the diameters of the finishing edges are all equal.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. For the reusable multi-edge extrusion tap of the present utility model, through the structure of arranging multiple cutting units and setting intervals between every two adjacent cutting units, it can effectively achieve that after the cutting edge at the very head is damaged, the damaged cutting unit can be completely removed by cutting at the interval position, so that the original second cutting unit becomes the first one to realize the cutting function; when there are multiple cutting units, and so on, to effectively achieve the effect of repeatedly using an extrusion tap. Compared with the traditional extrusion tap, under the same tap consumables situation, the service life of the extrusion tap is greatly improved.

[0014] 2. The reusable multi-edge extrusion tap of the present utility model adopts the number of two cutting units. On the one hand, because the total length of the tap is about 10 cm and the shank part occupies most of the length. If too many cutting units are set, the minimum length of the shank part cannot be guaranteed; on the other hand, because the calibration edge also has a service life, and during cutting, its calibration edge is constantly in use and wearing. Therefore, if too many cutting units are set, it may also lead to the service life of the calibration edge not keeping up.

[0015] 3. For the reusable multi-edge extrusion tap of the present utility model, by setting the length ratio in the case of two cutting units, on the one hand, it can effectively protect the cutting edge at the very head through the shorter calibration edge in the first section, and at the same time ensure the overall cutting strength through the longer calibration edge in the latter section; on the other hand, without affecting the protection effect on the cutting edge at the very head, the length of the calibration edge in the first section should not be too long to ensure that after removing the calibration edge in the first section, the overall tap strength is still sufficient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of a reusable multi-edge extrusion tap of the present utility model.

[0018] MAIN ELEMENT SYMBOL DESCRIPTION

[0019] 10. Shank part; 20. Cutting part; 21. Cutting unit; 211. Cutting edge; 212. Calibration edge. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figure 1 , a reusable multi-edge extrusion tap, comprising a shank portion 10 and a cutting portion 20 connected to each other. The cutting portion 20 includes a plurality of cutting units 21. Each cutting unit 21 includes a cutting edge 211 and a relieving edge 212 arranged in sequence in the direction from the cutting portion 20 to the shank portion 10. There is an interval between every two adjacent cutting units 21.

[0023] By setting a structure with a plurality of cutting units 21 and an interval between every two adjacent cutting units 21 in the integral extrusion tap, it can effectively achieve that after the cutting edge 211 at the very head is damaged, the damaged cutting unit 21 is entirely removed by cutting at the interval position, so that the originally second cutting unit 21 becomes the first one to achieve the cutting effect; when there are multiple cutting units 21, and so on, to effectively achieve the function of repeatedly using an extrusion tap. Compared with the traditional extrusion tap, under the same tap consumables, the service life of the extrusion tap is greatly improved.

[0024] Please refer to Figure 1 , preferably, the number of the cutting units 21 is two. The reason for adopting the number of two cutting units 21 is that on the one hand, since the total length of the tap is about 10 cm and the shank portion 10 occupies most of the length, if too many cutting units 21 are set, the minimum length of the shank portion 10 cannot be guaranteed; on the other hand, since the relieving edge 212 also has a service life, and during cutting, its relieving edge 212 is constantly in use and wear, so if too many cutting units 21 are set, it may also lead to the service life of the relieving edge 212 not being able to keep up.

[0025] Please refer to Figure 1 , the distance between the two cutting units 21 ranges from 0.5 to 2 mm, and its specific examples can be flexibly adjusted according to taps of different specifications and lengths. On the one hand, by reserving enough distance, it is ensured that it is not easy to accidentally cut the next cutting edge 211 to be used during cutting. On the other hand, the distance is not too far, which not only ensures the overall strength of the tap but also ensures that the length of the cutting edge part is sufficient.

[0026] Please refer to Figure 1 , the ratio of the length of the correcting edge 212 of one cutting unit 21 away from the shank 10 to the length of the correcting edge 212 of the other cutting unit 21 is 0.3 to 0.7. Preferably, the ratio is 0.5. By setting the length ratio in the case of two cutting units 21, on the one hand, the first shorter correcting edge 212 can effectively protect the cutting edge 211 at the very head, and at the same time, the overall cutting strength is ensured by the later longer correcting edge 212; on the other hand, without affecting the protection effect on the cutting edge 211 at the very head, the length of the first correcting edge 212 should not be too long to ensure that the overall strength of the tap is still sufficient for use after removing the first correcting edge 212.

[0027] Please refer to Figure 1 , several cutting units 21 are concentrically arranged and the diameters of the correcting edges 212 are all equal. Through the structure of concentric and same-diameter correcting edges 212, the cutting stability during the whole cutting process can be effectively ensured.

[0028] Please refer to Figure 1 , the diameter of each cutting piece increases sequentially along the direction from the cutting part 20 to the shank 10 until it is the same as the diameter of the correcting edge 212. During the cutting process, drilling is carried out by the cutting pieces of the cutting part 20, and then the subsequent tooth holes are cut to the same radius by the correcting edge 212 to realize the tapping process.

[0029] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A reusable multi-edge extrusion tap, characterized in that: It includes a connected handle part (10) and a cutting part (20), the cutting part (20) includes a number of cutting units (21), and each cutting unit (21) includes a cutting edge (211) and a correction edge (212) arranged in sequence along the direction from the cutting part (20) to the handle part (10), and every two adjacent cutting units (21) are arranged at intervals.

2. The reusable multi-edge extrusion tap according to claim 1, wherein: The number of the cutting units (21) is two.

3. The reusable multi-edge extrusion tap according to claim 2, wherein: The distance range between the two cutting units (21) is 0.5 - 2 mm.

4. The reusable multi-edge extrusion tap according to claim 2, wherein: The ratio of the length of the correction edge (212) of one cutting unit (21) far from the handle part (10) to the length of the correction edge (212) of the other cutting unit (21) is 0.3 - 0.

7.

5. The reusable multi-edge extrusion tap according to claim 1, wherein: A number of the cutting units (21) are concentrically arranged and the diameters of the correction edges (212) are all equal.

Images