Collet unit having a strong bonding effect

Abstract

To provide a collet unit having a strong bonding effect that improves processing efficiency and quality. 【Solution means】The present invention includes a collet 10, a cutter 20, a fixing member 30, a bolt 50, and a lock cover 40. Inside the collet, a communicating tapered hole, a locking groove 11, and a lock hole 13 are provided. The cutter includes an engaging hole 23 having a polygonal contour, and a provided tapered coupling portion 21 is inserted into the tapered hole of the cutter. The fixing member is provided with an engaging portion 33 that is locked to the engaging hole and a locking block 31 that is locked to the locking groove. The bolt passes through the fixing member and is screwed into the lock hole to couple the fixing member and the collet. The lock cover is coupled to the collet. According to the present invention, it is possible to solve the problem that the conventional collet and cutter easily rotate relative to each other, which has an adverse effect on the processing quality.

Description

Technical Field

[0001] The present invention relates to a processing device, and more particularly to a collet unit having a strong bonding effect for improving processing efficiency and quality.

Background Art

[0002] Generally, when performing cutting or drilling of a workpiece, it is necessary to drive a cutter by a processing spindle for processing. However, a collet is required to connect the cutter and the processing spindle.

[0003] A conventional strong bonding device between a collet and a cutter includes a collet and a cutter. The cutter is rod-shaped and has opposite ends. A blade is provided at one end, and the other end is fixed inside the collet. However, in this structure, when the collet and the cutter are driven by the spindle to perform cutting or drilling, since the workpiece to be processed has a strong resistance to the collet and the cutter, the collet and the rod-shaped cutter are likely to rotate relative to each other.

[0004] Such a collet and cutter that are likely to rotate relative to each other not only have poor processing efficiency but also may have an adverse effect on the processing quality of the workpiece. As described above, there is still room for improvement and progress in the conventional strong bonding device between the collet and the cutter.

Summary of the Invention

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a collet unit having a strong bonding effect for improving processing efficiency and quality.

[0006] In order to achieve the above object, the present invention is a collet unit having a strong bonding effect, including a collet, a cutter, a fixing member, a bolt, and a lock cover. The collet includes opposite ends, a locking groove formed inside the collet and having a bottom surface, a tapered hole extending from one end of the collet towards the locking groove and communicating with the locking groove, the width of the tapered hole decreasing as the diameter approaches the locking groove, and a lock hole extending from the bottom surface of the locking groove towards the other end of the collet and including an internal thread. The cutter is tapered and has an abutting end and an insertion end inserted into the tapered hole, a coupling portion with an outer diameter decreasing from the abutting end towards the insertion end, an engaging hole extending from the insertion end towards the abutting end and having a polygonal cross-section, an extension rod protruding from the abutting end and having a machining end away from the coupling portion, and at least one machining member attached to the machining end. The fixing member is located inside the collet and engaged in the locking groove, has a block shape with a first surface and a second surface facing opposite directions respectively, an outer diameter smaller than the diameter of the tapered hole, a locking block with the second surface abutting against the bottom surface of the locking groove, and an engaging portion provided on the first surface of the locking block, having a polygonal cross-section and inserted into and engaged with the engaging hole. The bolt passes through the fixing member and is screwed into the lock hole to couple the fixing member and the collet. The lock cover is coupled to the collet, pressed against the abutting end, and has a through hole through which the extension rod and the machining member pass, and a collet unit having a strong coupling effect. is proposed.

[0007] The effects obtained by the technical means of the present invention are as follows. In the present invention, a fixing member is provided inside the collet. The engaging portion of the fixing member is inserted into and locked with the engaging hole of the cutter, and the locking block of the fixing member is locked with the locking groove of the collet, thereby locking the fixing member, the cutter, and the collet to each other. Therefore, the cutter resists the reaction force during processing and is less likely to rotate relative to the collet, improving the processing efficiency and the processing quality.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0009] To understand the technical features and practical effects of the present invention in more detail and to enable implementation based on the content of the present invention, the following will be described in detail using the illustrated preferred embodiments.

[0010] As shown in FIGS. 1 to 4, a preferred embodiment of a strong coupling structure between a collet and a cutter according to the present invention includes a collet 10, a cutter 20, a fixing member 30, a lock cover 40, and a bolt 50.

[0011] As shown in FIGS. 1 to 4, the collet 10 includes opposite ends, a locking groove 11, a tapered hole 12, a locking hole 13, and a threaded segment 14. Among them, the locking groove 11 is formed inside the collet 10, has a bottom surface 111, and its contour presents a polygon. The tapered hole 12 has a tapered contour, extends from one end of the collet 10 toward the locking groove 11 and communicates with the locking groove 11, and its diameter decreases toward the locking groove 11. The locking hole 13 extends from the bottom surface 111 of the locking groove 11 toward the other end of the collet 10 and includes an internal thread. The threaded segment 14 is provided at the same end of the collet 10 as the tapered hole 12 and has an internal thread 141.

[0012] As shown in FIGS. 1 to 4, the cutter 20 includes a connecting portion 21, an extension rod 22, an engaging hole 23, an inlet flow path 24, a communicating flow path 25, and two processing members 27. Among them, the connecting portion 21 has a tapered shape corresponding to the tapered hole 12 with a tapered contour, and has an abutting end 211 and an insertion end 212 inserted into the tapered hole 12. The outer diameter of the connecting portion 21 decreases from the abutting end 211 toward the insertion end 212. The extension rod 22 is a cylindrical rod, protrudes from the abutting end 211, and has a processing end 221 away from the connecting portion 21. The engaging hole 23 extends from the insertion end 212 toward the abutting end 211 and has a contour presenting a polygon. The inlet flow path 24 extends from the bottom of the engaging hole 23 toward the processing end 221 of the extension rod 22. The communicating flow path 25 communicates with the inlet flow path 24, extends toward the processing end 221 of the extension rod 22, and communicates with the outside of the processing end 221 of the extension rod 22. The two processing members 27 are attached to the processing end 221 of the extension rod 22.

[0013] As shown in FIGS. 1 to 4, the engaging hole 23, the inlet flow path 24, and the communicating flow path 25 communicate with each other on the same axis.

[0014] As shown in FIGS. 1 to 4, the fixing member 30 is located inside the collet 10 and includes a locking block 31, a receiving groove 32, an engaging portion 33, and a through hole 34. The locking block 31 is in a block shape and has a polygonal cross section corresponding to the contour of the locking groove 11, and has a first surface 311 and a second surface 312 facing opposite directions respectively. The engaging portion 33 is provided on the first surface 311 of the locking block 31 and has a polygonal cross section corresponding to the contour of the engaging hole 23. The receiving groove 32 is provided inside the fixing member 30 and extends from the engaging portion 33 toward the locking block 31. The through hole 34 is formed inside the fixing member 30 and extends from the bottom of the receiving groove 32 to the second surface 312 of the locking block 31, and the diameter of the through hole 34 is smaller than the inner diameter of the receiving groove 32.

[0015] As shown in FIGS. 1 to 4, the locking block 31 is engaged in the locking groove 11, and the second surface 312 is abutted against the bottom surface 111 of the locking groove 11, thereby locking the fixing member 30 and the collet 10 to each other. The engaging portion 33 is inserted into the engaging hole 23 of the cutter 20, thereby engaging the cutter 20 and the fixing member 30. By engaging the locking block 31 and the locking groove 11 and engaging the engaging portion 33 and the engaging hole 23, the fixing member 30, the collet 10, and the cutter 20 are engaged with each other.

[0016] As shown in FIGS. 1 to 4, in the present invention, by making the outer diameter of the locking block 31 of the fixing member 30 smaller than the diameter of the tapered hole 12 of the collet 10, the locking block 31 of the fixing member 30 can be smoothly locked in the locking groove 11 of the collet 10, and the second surface 312 of the locking block 31 can be abutted against the bottom surface 111 of the locking groove 11.

[0017] As shown in FIGS. 1 to 6, specifically, the cross-section of the locking block 31 of the fixing member 30 is hexagonal, and the contour of the locking groove 11 is hexagonal corresponding to the cross-section of the locking block 31, so that the locking block 31 and the locking groove 11 are engaged. Also, the cross-section of the engaging portion 33 of the fixing member 30 is hexagonal, and the contour of the engaging hole 23 of the cutter 20 is hexagonal corresponding to the cross-section of the engaging portion 33, so that the engaging portion 33 and the engaging hole 23 can be engaged. In this way, the purpose of engaging the three members of the fixing member 30, the collet 10, and the cutter 20 can be achieved.

[0018] As shown in FIGS. 1 to 4, the lock cover 40 includes an external thread 41 and a through hole. The lock cover 40 is screwed to the threaded segment 14 of the collet 10 by the external thread 41, abuts against the abutting end 211 of the connecting portion 21 of the cutter 20, and the extension rods 22 of the cutter 20 and the two processing members 27 penetrate through the through hole of the lock cover 40.

[0019] As shown in FIGS. 1 to 4, the bolt 50 penetrates through the receiving groove 32 and the through hole 34 of the fixing member 30 and is screwed into the locking hole 13 of the collet 10 to couple the fixing member 30 and the collet 10.

[0020] Compared with the conventional strong coupling device between the collet and the cutter, in the present invention, the fixing member 30 is firmly provided inside the collet 10, and the fixing member 30 having the engaging portion 33 with a polygonal cross-section is installed. An engaging hole 23 having a polygonal contour corresponding to the insertion end 212 is formed at the insertion end 212 of the connecting portion 21 of the cutter 20. Further, since the locking block 31 of the fixing member 30 has a polygonal cross-section, the contour of the locking groove 11 of the collet 10 is also polygonal corresponding to the cross-section of the locking block 31. The engaging portion 33 and the engaging hole 23 are engaged, and the locking block 31 and the locking groove 11 are engaged. By engaging the three members of the fixing member 30, the collet 10, and the cutter 20, relative rotation between the cutter 20 and the collet 10 is prevented. In this way, when machining a workpiece in the present invention, since the cutter 20 resists the reaction force from the workpiece, the machining efficiency is improved, and thus the machining quality is also improved.

[0021] Furthermore, when adopting the present invention, as long as the engaging portion 33 and the engaging hole 23 can be engaged with each other, there are no particular restrictions on the cross-section of the engaging portion 33 and the shape of the contour of the engaging hole 23. Similarly, as long as the locking block 31 and the locking groove 11 can be engaged with each other, there are no particular restrictions on the cross-section of the locking block 31 and the shape of the contour of the locking groove 11. Also, the above-mentioned cross-section and contour shapes may be triangular, quadrilateral, pentagonal or hexagonal, and the processing members 27 in the present invention are respectively cutting edges for processing.

Explanation of Reference Numerals

[0022] 10 Collet 11 Locking Groove 111 Bottom Surface 12 Tapered Hole 13 Locking Hole 14 Threaded Segment 141 Internal Thread 20 Cutter 21 Coupling Portion 211 Contact End 212 Insertion End 22 Extension Rod 221 Processing End 23 Engaging Hole 24 Inlet Flow Path 25 Communication Flow Path 27 Processing Member 30 Fixed Member 31 Locking Block 311 First Surface 312 Second Surface 32 Receiving Groove 33 Engaging Portion 34 Through Hole 40 Locking Cover 41 External Thread 50 Bolt

Claims

1. A collet unit having a strong bonding effect, including a collet, a cutter, a fixing member, a bolt, and a lock cover, The collet includes opposite ends, a locking groove formed inside the collet and having a bottom surface, a tapered hole extending from one end of the collet toward the locking groove and communicating with the locking groove, the width of the tapered hole decreasing as the diameter approaches the locking groove, and a lock hole extending from the bottom surface of the locking groove toward the other end of the collet and including an internal thread, The cutter has a tapered shape and has an abutting end and an insertion end inserted into the tapered hole, a coupling portion whose outer diameter decreases from the abutting end toward the insertion end, an engaging hole extending from the insertion end toward the abutting end and having a polygonal contour, an extension rod protruding from the abutting end and having a machining end away from the coupling portion, and at least one machining member attached to the machining end, The fixing member is located inside the collet and engaged in the locking groove, has a block shape, has a first surface and a second surface facing opposite directions respectively, an outer diameter smaller than the diameter of the tapered hole, a locking block whose second surface abuts against the bottom surface of the locking groove, and an engaging portion provided on the first surface of the locking block, having a polygonal cross-section and inserted into and engaged with the engaging hole, The bolt passes through the fixing member and is screwed into the lock hole to couple the fixing member and the collet, The lock cover is coupled to the collet, pressed against the abutting end, and has a through hole through which the extension rod and the machining member pass, and is characterized in that it is a collet unit having a strong bonding effect.

2. The fixing member has a receiving groove and a through hole. The receiving groove is provided inside the fixing member and extends from the engaging portion toward the locking block. The through hole is formed inside the fixing member and extends from the bottom of the receiving groove to the second surface of the locking block. The bolt passes through the receiving groove and the through hole. The collet unit having a strong bonding effect according to Claim 1 is characterized in that.

3. The collet is provided at the same end of the collet together with the tapered hole and includes a screwing segment having an internal thread. The collet unit having a strong coupling effect according to claim 2, wherein the lock cover has an external thread that is screwed with the threaded segment.

4. The collet unit having a strong coupling effect according to claim 3, wherein the cutter includes an inlet flow path extending from the bottom of the engaging hole toward the processing end, and a communication flow path communicating with the inlet flow path, extending toward the processing end, and communicating with the outside of the processing end.

5. The collet unit having a strong coupling effect according to claim 4, wherein the processing members are each a cutting edge.

6. The collet unit having a strong coupling effect according to claim 5, wherein the extension rod is a cylindrical rod.

7. The collet unit having a strong coupling effect according to any one of claims 1 to 6, wherein the cross section of the locking block is hexagonal, and the contour of the locking groove is hexagonal so as to correspond to the cross section of the locking block.

8. The collet unit having a strong coupling effect according to any one of claims 1 to 6, wherein the cross section of the locking block is pentagonal, and the contour of the locking groove is pentagonal so as to correspond to the cross section of the locking block.

9. The collet unit having a strong coupling effect according to any one of claims 1 to 6, wherein the cross section of the locking block is quadrilateral, and the contour of the locking groove is quadrilateral so as to correspond to the cross section of the locking block.

10. The collet unit having a strong coupling effect according to any one of claims 1 to 6, wherein the cross section of the engaging portion is hexagonal, the contour of the engaging hole is hexagonal so as to correspond to the cross section of the engaging portion, the cross section of the locking block is hexagonal, and the contour of the locking groove is hexagonal so as to correspond to the cross section of the locking block.

Images