TWI663007B - Adapter collet - Google Patents

Abstract

The invention relates to a conversion collet, which is mainly used for locking a cutting insert and sleeved on the front end of a handle for locking. The collet includes a collet and a cutter bar. The collet is provided with a first cone portion and a second cone portion. It is placed in the handle and pushed by the nut when it is locked. The collet is provided with an internal screw hole on the side of the first cone and the collet is provided with an accommodation hole on the other side of the collet. For the arbor accommodating, a positioning hole is provided between the internal screw hole and the accommodating hole, and a positioning surface is provided on the side of the positioning hole adjacent to the internal screw hole. The positioning surface and the internal screw hole have a vertical tolerance of 90 degrees. Limitation, the cutter rod includes a rod body, one end of the rod body is provided with a cutter seat, a rod extends on the end surface of the rod body at the other end of the rod body, and a 90 degree vertical tolerance limit is provided between the end surface of the rod body and the screw. .

Description

Adapter collet

The invention is an innovative design of a collet, in particular, a conversion collet that can replace a conventional elastic collet and has a short rotational elongation of a clamping tool, which helps to improve rigidity.

The conventional elastic collet 6 is shown in Figs. 9 and 10. It is installed in the front end of the tool holder 4. The tool holder 4 is installed in the main shaft of the processing machine. The main function of the elastic collet 6 is as a clamp. In terms of the specifications of the ER-20 elastic clamp, the size of the shank 51 of various cutters 5 ranges from 1 to 13 mm. The maximum size of the shank 51 of the cutter 5 is 13 mm. It is limited by the design of the structure, and the tapered size of the tapered end of the rear end limits the space for the maximum limit of the device blade 51, which cannot accommodate a larger size blade 51. In addition, the disposable blade 50 is installed in In the case of the cutter 5, the length L overhanging from the nut 42 to the end of the discarded blade 50 is as much as 45 mm. The longer the overhang elongation, the larger the deviation of the end of the discarded blade 50 from the center will be, and the rigidity of the cutter 5 will decrease. This will affect the processing accuracy of the disposable blade 50 and increase the wear of the disposable blade 50. This lack of improvement needs to be improved by the industry.

Due to the structural and functional design of the conventional elastic collet, the space for accommodating the tool holder is limited, and the length of the overhang from the blade end is too long. Machining accuracy of blades and increased blade wear.

The conversion collet of the present invention is mainly used to lock the cutting insert and sleeve it on the handle The front end is locked and includes a collet and a knife rod. The collet is provided with a first cone portion and a second cone portion, which are accommodated in the handle and pushed by the nut when the nut is locked. An inner screw hole is located on the side of the first cone, and an accommodation hole is provided on the other side of the collet. The accommodation hole is used for receiving the tool rod, and a positioning hole is provided between the inner screw hole and the accommodation hole. The positioning hole is provided with a positioning surface adjacent to the inner screw hole side. The positioning surface and the inner screw hole have a 90-degree vertical tolerance limit. The tool bar includes a rod body. One end of the rod body is provided with a tool holder. A screw is extended on the end surface of the rod body at the other end of the body, and a 90-degree vertical tolerance limit is set between the end surface of the rod body and the screw.

When the collet and cutter bar sleeve of the present invention are placed inside the handle, the blade 43 of the locking blade is exposed outside the nut, so the locking or disassembly of the disposable blade will not be affected. When the disposable blade is worn out, , Still will not affect the removal and replacement of the discarded blade, in addition, the end of the discarded blade extends the length of the nut L is only 1 / 2.73 times the conventional size blade, the shorter the overhang, the more the end of the tool is off-center The smaller the error, and the better the rigidity of the tool, which is conducive to the cutting performance of discarded inserts.

10‧‧‧ Collets

11‧‧‧ the first cone

12‧‧‧ second cone

13‧‧‧Internal screw hole

14‧‧‧ Receiving hole

15‧‧‧ positioning hole

151‧‧‧Positioning surface

20‧‧‧tool bar

21‧‧‧ shaft

22‧‧‧Blade holder

221‧‧‧face of rod body

23‧‧‧Screw

4‧‧‧ knife handle

41‧‧‧ taper hole

42‧‧‧nut

43‧‧‧Screw

5‧‧‧ cutter

51‧‧‧tool bar

6‧‧‧ Elastic Collet

Figure 1 is a perspective view of the present invention

Figure 2 is a combined sectional view of the present invention

Figure 3 is a sectional view of the present invention combined with a knife handle

Figure 4 is a sectional view of the assembly tool of the present invention

Fig. 5 is an embodiment of using a engraving blade in the holder of the arbor of the present invention

FIG. 6 is an embodiment of using the chamfered blade of the tool holder of the present invention.

FIG. 7 is a diagram showing an embodiment in which the accommodating hole of the collet of the present invention and the shank of the arbor are set to taper

FIG. 8 is a combination diagram of a collet and a cutter bar of the taper design of the present invention

Figure 9 is a plan view of a conventional elastic collet

Figure 10 is a plan view of a conventional elastic collet

Please refer to FIG. 1 and FIG. 2. The conversion collet of the present invention is mainly used for locking cutting tools and sleeved on the front end of the handle 4 for locking. The collet 10 includes a collet 10 and a shank 20. A first taper portion 11 and a second taper portion 12 are provided at both ends of the outer end, and are accommodated in the handle 4 and pushed by the nut 42 when the nut 42 is locked. The design of this structure is similar to the traditional elastic collet Similarly, the collet 10 is provided with an internal screw hole 13 on the side of the first cone 11, and the collet 10 is provided with an accommodation hole 14 on the other side. The accommodation hole 14 is used for receiving the cutter bar 20. A positioning hole 15 is provided between the internal screw hole 13 and the accommodation hole 14. A positioning surface 151 is provided on the side of the positioning hole 15 adjacent to the internal screw hole 13. The positioning surface 151 and the center of the internal screw hole 13 have a 90-degree vertical. The tolerance is limited to ensure that the yaw error between the shank 20 and the collet 10 can be ensured when the shank 20 is locked.

The cutter bar 20 includes a rod body 21. One end of the rod body 21 is provided with a knife holder 22. The shape of the knife holder 22 is set according to the shape of the installed blade. The other end of the rod body 21 extends on the end surface 221 of the rod body. A screw 23 is provided, and a 90-degree vertical tolerance limit is set between the rod end surface 22 and the center of the screw 23.

Please refer to FIG. 2 and FIG. 3. The cutter bar 20 of the present invention is accommodated in the accommodation hole 14 of the collet 10, and the screw 23 at one end of the cutter bar 20 is screwed into the inner screw hole 13 of the collet 10. Locking, at the same time, the end surface 211 of the rod body 21 and the positioning surface 151 of the positioning hole 15 are abutted and combined, so that the cutter bar 20 and the collet 10 are assembled to ensure accurate verticality and the amount of deflection is affected. limit. The combined collet 10 and cutter bar 20 are put into the taper hole 41 of the handle 4 and locked by the nut 42 as shown in Figure 4. As shown, when the disposable blade 50 is assembled in the knife seat 22, the length L of the nut 42 extending from the end of the disposable blade 50 is only 16.5mm, which is compared with the traditional elastic collet 6 (as shown in FIG. 10). The length L of the extended nut 42 is 45mm, a difference of 2.73 times. The shorter the overhang, the smaller the deviation of the end of the tool 5 from the center will be, and the better the rigidity of the tool 5 will be, which is conducive to the disposable blade 50. Cutting performance.

Please refer to FIG. 4, when the collet 10 and the arbor 20 are inserted into the handle 4 and locked, the screw 43 of the locking blade 50 is exposed outside the nut 42, so the discarded blade 50 is locked. Or the disassembly will not be affected. When the disposable blade 50 is worn out, the operation of disassembling and replacing the disposable blade 50 will not be affected, and the practicality is excellent.

Please refer to FIG. 5 and FIG. 6, which are examples of using the blade 50 mounted on the tool holder 22 of the tool holder 20 of the present invention. The blade 50 locked by the tool holder 22 can be set as a disposable center drill. It can be set as the engraving blade 50, which can be used for engraving work, or as the chamfering blade 50, etc., and has a wide range of practicability.

Please refer to FIG. 7, which is a plane system diagram of an embodiment of an accommodation hole 14 provided inside the collet 10 of the present invention. The accommodation hole 14 is used for accommodating the shank 20, and the accommodation hole 14 is provided with The taper value of the taper, the taper value of the receiving hole 14 is set to 1:10 according to this embodiment, and the rod body 21 corresponding to the receiving hole 14 is also set to taper. The taper setting of this embodiment is It is 1:10. When the cutter bar 20 is placed in the collet 10 and screwed, as shown in FIG. 8, the rod body 21 is gradually tightly engaged with the accommodation hole 14 while moving toward the collet 10 and is pressing. Together, the tighter the knife bar 20 and collet 10 are locked, the more tight the bar body 21 and the receiving hole 14 are due to the taper relationship, achieving the effect of tightening.

In summary, the conversion collet of the present invention improves the disadvantages of the traditional elastic collet, reduces the overhang of the cutter, and increases the rigidity of the cutter. At the same time, the cutter rod of the collet device is not penetrated. The design allows the maximum limit space to be increased, which can accommodate larger size tool holders, and has a practical and progressive design.

Claims (5)

A conversion collet, comprising a collet and a cutter bar, wherein the collet is provided with a first taper portion and a second taper portion at both ends of the outer end, which are accommodated in a handle and pushed up when the nut is locked. It is urgent that an internal screw hole is provided inside the collet and located on the side of the first cone, and an accommodation hole is provided on the other side of the collet, and the accommodation hole is for the knife rod to be accommodated between the internal screw hole and the accommodation. A positioning hole is provided between the holes, and the positioning hole is provided with a positioning surface adjacent to the inner screw hole side; the cutter rod includes a rod body, one end of the rod body is provided with a cutter seat, and the end surface of the rod body at the other end is extended. There is a screw. The conversion collet as described in item 1 of the scope of patent application, wherein the positioning surface and the inner screw hole have a vertical limit of 90 degrees. The conversion collet according to item 1 of the scope of patent application, wherein a 90-degree vertical limit is provided between the end surface of the rod body and the screw. The conversion collet according to item 1 of the scope of patent application, wherein the shape of the knife seat is set according to the shape of the disposable blade installed. The conversion collet as described in item 1 of the scope of patent application, wherein the receiving hole and the shank of the collet are provided with a corresponding taper.