Screw tap with detachable and replaceable cutting part

Abstract

The utility model discloses a screw tap with a detachable and replaceable cutting part, which belongs to the technical field of cutting tools, and is characterized in that the screw tap comprises a main body part and the cutting part, the end part of the cutting part is integrally provided with a connecting part, the main body part is provided with a connecting groove, the connecting part is matched with the connecting groove, and the connecting part is inserted into the connecting groove. A plurality of reinforcing protruding blocks are arranged on the outer side wall of the connecting part, a plurality of positioning grooves are formed in the inner side wall of the connecting groove, the reinforcing protruding blocks are matched with the positioning grooves, the reinforcing protruding blocks are inserted into the positioning grooves respectively, a linkage groove is formed in the outer side wall of the connecting part, a spring is arranged in the linkage groove, and an inserting block is detachably arranged on the main body part. A linkage block is arranged in the main body part in a sliding mode, the insertion block can push the linkage block to be inserted into the linkage groove and extrude the spring, so that the main body part and the cutting part are relatively fixed, the main body part is detachably connected with a fixing piece used for fixing the insertion block, the cutting part can be replaced through the screw tap, and the use cost can be effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of cutting tools, and particularly relates to a tap with a detachable and replaceable cutting part. Background Art

[0002] A tap is a tool for processing internal threads, also known as a screw tap.

[0003] A Chinese patent with announcement number CN208289158U discloses a tap, comprising: a tool handle, a first connecting portion and a processing portion, wherein the first connecting portion is connected between the tool handle and the processing portion; one end of the processing portion is connected to the other end of the first connecting portion, the processing portion has an axial core, a cutting edge is arranged on the axial core, the cutting edge comprises at least two protruding areas and at least two smooth areas, the protruding areas and the smooth areas surround the rotation axis and are alternately arranged, and the diameter of the rotation trajectory formed by the point on the protruding area farthest from the rotation axis is greater than the diameter of the rotation trajectory formed by the point on the smooth area farthest from the rotation axis.

[0004] The above technical solution has the following defects: as the use time increases, the processing part (cutting part) will inevitably wear or be damaged, but since one end of the first connecting part of the tap is fixedly connected to one end of the shank, the other end of the first connecting part is fixedly connected to one end of the second connecting part, and the other end of the second connecting part is fixedly connected to one end of the processing part, when the processing part (cutting part) is damaged, the tap needs to be replaced as a whole, and the use cost is relatively high. Utility Model Content

[0005] The purpose of the utility model is to solve the above problems existing in the prior art and to propose a tap with a detachable and replaceable cutting part. The technical problem to be solved by the utility model is: how to reduce the use cost.

[0006] The above-mentioned technical objectives of the utility model can be achieved through the following technical solutions: a tap with a detachable and replaceable cutting portion, comprising a main body and a cutting portion, the end of the cutting portion being integrally provided with a connecting portion, the main body being provided with a connecting groove, the connecting portion being adapted to the connecting groove, the connecting portion being inserted into the connecting groove, the outer side wall of the connecting portion being provided with a plurality of reinforcing protrusions, the inner side wall of the connecting groove being provided with a plurality of positioning grooves, the reinforcing protrusions being adapted to the positioning grooves, the plurality of reinforcing protrusions being respectively inserted into the plurality of positioning grooves, the outer side wall of the connecting portion being provided with a linkage groove, a spring being provided in the linkage groove, an insert block being detachably provided on the main body, a linkage block being slidably provided in the main body, the insert block being able to push the linkage block to be inserted into the linkage groove and squeeze the spring, so that the main body and the cutting portion remain relatively fixed, and a fixing piece for fixing the insert block being detachably connected to the main body.

[0007] In the above-mentioned tap with a detachable and replaceable cutting portion, a first bevel is provided at the end of the insert block, and a second bevel is provided at the end of the linkage block, and the first bevel can be abutted against the second bevel.

[0008] In the above-mentioned tap with a detachable and replaceable cutting portion, a slot is provided on the end surface of the main body, the opening direction of the slot is parallel to the central axis direction of the main body, and the insert block is inserted into the slot.

[0009] In the above-mentioned tap with a detachable and replaceable cutting portion, a guide hole is opened in the main body, the linkage block is slidably disposed in the guide hole, and the guide hole is aligned with the linkage groove.

[0010] In the above-mentioned tap with a detachable and replaceable cutting portion, the fixing part includes a fixing screw, a fixing groove is provided on the side wall of the connecting portion, a countersunk hole is provided on the side wall of the main body portion, the countersunk hole corresponds to the fixing groove, and the fixing screw passes through the countersunk hole and is threadedly connected to the fixing groove.

[0011] In the above-mentioned tap with a detachable and replaceable cutting portion, a guide slot is provided on the inner side wall of the slot, and a guide slide is provided on the outer side wall of the insert block. The guide slide is matched with the guide slot and the two slide in cooperation.

[0012] In the above-mentioned tap with a detachable and replaceable cutting portion, the end of the main body portion has a square neck section.

[0013] In the above-mentioned tap with a detachable and replaceable cutting portion, a plurality of chip removal grooves are formed on the outer side wall of the cutting portion, and the plurality of chip removal grooves are evenly distributed along the circumference of the cutting portion.

[0014] In the above-mentioned tap with a detachable and replaceable cutting portion, the cutting portion is made of high-speed steel or cemented carbide, and the outer surface of the cutting portion is provided with a titanium coating.

[0015] In the above-mentioned tap with a detachable and replaceable cutting portion, a plurality of reinforcing strips are provided on the outer side wall of the main body portion, and the plurality of reinforcing strips are evenly distributed along the axial direction of the main body portion.

[0016] In summary, the beneficial effects of the present invention compared with the prior art are as follows:

[0017] When the cutting part is damaged, first remove the fixing part and then remove the insert block. At this time, the elastic restoring force generated by the elastic deformation of the spring pushes the linkage block away from the linkage groove, and then the connecting part is separated from the connecting groove by external force. The cutting part is separated from the main body and the cutting part can be replaced at this time, thereby reducing the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a cross-sectional view of embodiment 1;

[0019] Figure 2 for Figure 1 A magnified view of part A;

[0020] Figure 3 for Figure 1 A magnified view of part B;

[0021] Figure 4 It is a structural schematic diagram of embodiment 1;

[0022] Figure 5 for Figure 4 Enlarged view of part C;

[0023] Figure 6 is a cross-sectional view from another angle of the first embodiment;

[0024] Figure 7 It is a structural diagram of embodiment 2.

[0025] Figure numerals: 1. main body; 2. cutting part; 3. connecting part; 4. connecting groove; 5. reinforcing protrusion; 6. positioning groove; 7. linkage groove; 8. spring; 9. insert block; 10. linkage block; 11. inclined surface one; 12. inclined surface two; 13. slot; 14. guide hole; 15. fixing screw; 16. fixing groove; 17. countersunk hole; 18. guide slide; 19. guide slide; 20. square neck section; 21. chip removal groove; 22. titanium coating; 23. reinforcing strip. DETAILED DESCRIPTION

[0026] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0027] Embodiment 1:

[0028] A tap with a detachable and replaceable cutting part, such as Figures 1 to 6 As shown, it comprises a main body 1 and a cutting part 2. The end of the main body 1 has a square neck section 20, which is convenient for installation and fixation.

[0029] In this embodiment, the cutting part 2 is made of high-speed steel. As another solution, the cutting part 2 can also be made of cemented carbide. The outer surface of the cutting part 2 is provided with a titanium coating 22 to ensure the hardness and wear resistance of the cutting part 2 and improve the service life and cutting performance of the cutting part 2.

[0030] The outer wall of the cutting portion 2 is provided with a plurality of chip grooves 21, which are evenly distributed along the circumference of the cutting portion 2. Preferably, there are three chip grooves 21, through which the chips generated during the machining process are discharged, thereby improving the stability of the tap during rotation.

[0031] A connecting portion 3 is integrally provided at the end of the cutting portion 2, a connecting groove 4 is provided on the main body 1, the connecting portion 3 is matched with the connecting groove 4, the connecting portion 3 is inserted into the connecting groove 4, a plurality of reinforcing protrusions 5 are provided on the outer wall of the connecting portion 3, a plurality of positioning grooves 6 are provided on the inner wall of the connecting groove 4, the reinforcing protrusions 5 are matched with the positioning grooves 6, and a plurality of reinforcing protrusions 5 are respectively inserted into a plurality of positioning grooves 6.

[0032] By arranging a plurality of reinforcing protrusions 5 on the outer wall of the connecting portion 3, the structural strength of the connecting portion 3 is ensured, which helps to resist the torsional force and impact force generated during the processing, thereby improving the service life; and by cooperating with a plurality of positioning grooves 6, the connection stability between the cutting portion 2 and the main body 1 is enhanced.

[0033] An insert block 9 is detachably provided on the main body 1, a slot 13 is opened on the end face of the main body 1, the opening direction of the slot 13 is parallel to the central axis direction of the main body 1, the insert block 9 is inserted into the slot 13, and a fixing piece for fixing the insert block 9 is detachably connected to the main body 1.

[0034] A guide slot 19 is provided on the inner wall of the slot 13, and a guide slide bar 18 is provided on the outer wall of the insert block 9. The guide slide bar 18 is adapted to the guide slot 19 and the two slide in cooperation. Through the guiding cooperation between the guide slider and the guide slot 19, the insert block 9 is smoother when inserted into the slot 13 or taken out from the slot 13, with reduced resistance, which facilitates the disassembly and assembly of the insert block 9 and also reduces the wear between the insert block 9 and the slot 13.

[0035] Specifically, in this embodiment, the fixing member includes a fixing screw 15, a fixing groove 16 is opened on the side wall of the connecting portion 3, and a countersunk hole 17 is opened on the side wall of the main body 1. The countersunk hole 17 corresponds to the fixing groove 16. The fixing screw 15 passes through the countersunk hole 17 and is threadedly connected to the fixing groove 16. The fixing screw 15 cooperates with the fixing groove 16 and the countersunk hole 17 to ensure the relative stability of the plug 9 and the main body 1.

[0036] A linkage block 10 is slidably arranged in the main body 1, a guide hole 14 is opened in the main body 1, the linkage block 10 is slidably arranged in the guide hole 14, a linkage groove 7 is opened on the outer wall of the connecting part 3, the guide hole 14 is aligned with the linkage groove 7, and the guiding effect of the guide hole 14 on the linkage block 10 ensures that the linkage block 10 can stably enter the linkage groove 7 when sliding.

[0037] A spring 8 is provided in the linkage groove 7, and the insert block 9 can push the linkage block 10 to insert into the linkage groove 7 and squeeze the spring 8, so that the main body 1 and the cutting part 2 remain relatively fixed. Specifically, when the linkage block 10 is inserted into the linkage groove 7, the position of the linkage block 10 is restricted by the cooperation of the insert block 9 and the spring 8, thereby ensuring the stability of the linkage block 10, and the linkage block 10 cooperates with the linkage groove 7 and the guide hole 14, so that the connecting part 3 cannot be separated from the connecting groove 4.

[0038] The end of the insert block 9 is provided with a slope 11, and the end of the linkage block 10 is provided with a slope 2 12. The slope 11 can be abutted against the slope 2 12. Through the cooperation between the slope 11 and the slope 2 12, the insert block 9 pushes the linkage block 10 to insert into the linkage groove 7 and squeeze the spring 8.

[0039] Method for disassembling and assembling the cutting part 2:

[0040] When disassembling the cutting part 2, first turn the fixing screw 15 to remove it, and then take the insert block 9 out of the slot 13. At this time, the elastic restoring force generated by the elastic deformation of the spring 8 pushes the linkage block 10 away from the linkage groove 7, and then the connecting part 3 is separated from the connecting groove 4 by external force. The cutting part 2 and the main body 1 are separated, and the cutting part 2 can be replaced at this time; when installing the cutting part 2, first align the reinforcing protrusion 5 with the positioning groove 6, then insert the connecting part 3 into the connecting groove 4, and then insert the insert block 9 from the slot 13, so that the insert block 9 pushes the linkage block 10 into the linkage groove 7 and squeezes the spring 8, and finally the fixing screw 15 is passed through the countersunk hole 17 and threadedly connected to the fixing groove 16.

[0041] Embodiment 2:

[0042] The difference between the second embodiment and the first embodiment is that Figure 7As shown, the outer wall of the main body 1 is provided with a plurality of reinforcing strips 23, and the plurality of reinforcing strips 23 are evenly distributed along the axial direction of the main body 1. By providing a plurality of reinforcing strips 23 on the outer wall of the main body 1, the structural strength of the main body 1 is improved and the service life is improved. Moreover, since the plurality of reinforcing strips 23 are evenly distributed along the axial direction of the main body 1, the spacing between the reinforcing strips 23 can be used as a reference scale for processing, which is convenient for determining the processing depth.

[0043] The specific embodiments described in this article are merely examples of the spirit of the utility model; technicians in the technical field to which the utility model belongs can make various modifications or additions to the described specific embodiments or replace them in a similar manner, but will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.

Claims

1. A tap with a detachable and replaceable cutting portion, characterized in that: The invention comprises a main body (1) and a cutting part (2), wherein the end of the cutting part (2) is integrally provided with a connecting part (3), the main body (1) is provided with a connecting groove (4), the connecting part (3) is matched with the connecting groove (4), the connecting part (3) is inserted into the connecting groove (4), the outer side wall of the connecting part (3) is provided with a plurality of reinforcing protrusions (5), the inner side wall of the connecting groove (4) is provided with a plurality of positioning grooves (6), the reinforcing protrusions (5) are matched with the positioning grooves (6), and the plurality of reinforcing protrusions (5) are respectively inserted into the plurality of reinforcing protrusions (5). The outer wall of the connecting portion (3) is provided with a linkage groove (7) in each of the positioning grooves (6), a spring (8) is provided in the linkage groove (7), an insert block (9) is detachably provided on the main body (1), a linkage block (10) is slidably provided in the main body (1), the insert block (9) can push the linkage block (10) to be inserted into the linkage groove (7) and squeeze the spring (8), so that the main body (1) and the cutting portion (2) remain relatively fixed, and a fixing piece for fixing the insert block (9) is detachably connected to the main body (1).

2. A tap with a detachable and replaceable cutting portion according to claim 1, characterized in that: The end of the insert block (9) is provided with a first inclined surface (11), and the end of the linkage block (10) is provided with a second inclined surface (12), and the first inclined surface (11) can be in contact with the second inclined surface (12).

3. A tap with a detachable and replaceable cutting portion according to claim 1, characterized in that: A slot (13) is provided on the end surface of the main body (1), the opening direction of the slot (13) is parallel to the central axis direction of the main body (1), and the insert block (9) is inserted into the slot (13).

4. A tap with a detachable and replaceable cutting portion according to claim 1, characterized in that: A guide hole (14) is provided in the main body (1), the linkage block (10) is slidably disposed in the guide hole (14), and the guide hole (14) is aligned with the linkage groove (7).

5. A tap with a detachable and replaceable cutting portion according to claim 1, characterized in that: The fixing member comprises a fixing screw (15), a fixing groove (16) is provided on the side wall of the connecting portion (3), a countersunk hole (17) is provided on the side wall of the main body (1), the countersunk hole (17) corresponds to the fixing groove (16), and the fixing screw (15) passes through the countersunk hole (17) and is threadedly connected to the fixing groove (16).

6. A tap with a detachable and replaceable cutting portion according to claim 3, characterized in that: The inner wall of the slot (13) is provided with a guide slot (19), and the outer wall of the insert block (9) is provided with a guide slide bar (18). The guide slide bar (18) is adapted to the guide slot (19) and the two slide in cooperation.

7. A tap with a detachable and replaceable cutting portion according to claim 1, characterized in that: The end of the main body (1) has a square neck section (20).

8. The tap with a detachable and replaceable cutting portion according to claim 1, characterized in that: The outer side wall of the cutting portion (2) is provided with a plurality of chip removal grooves (21), and the plurality of chip removal grooves (21) are evenly distributed along the circumference of the cutting portion (2).

9. A tap with a detachable and replaceable cutting portion according to claim 1, characterized in that: The cutting portion (2) is made of high-speed steel or hard alloy, and the outer surface of the cutting portion (2) is provided with a titanium coating (22).

10. A tap with a detachable and replaceable cutting portion according to claim 1, characterized in that: The outer side wall of the main body (1) is provided with a plurality of reinforcement strips (23), and the plurality of reinforcement strips (23) are evenly distributed along the axial direction of the main body (1).

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