TWI576201B - Tool clamp device - Google Patents

Description

Knife holder

The invention relates to an automatic tool change mechanism; in particular to a tool holder device suitable for different tool bar structures.

It is known that the arbor used in a processing machine having an automatic tool change mechanism can roughly distinguish between two structures according to different processing requirements, one of which is shown in Fig. 1(a), which is suitable for the rotation speed. In the slower heavy cutting process, in order to avoid the blade 1 being slipped during the machining process, a concave coupling groove 1a is provided at each of the symmetrical positions of the circumferential surface thereof, and each of the coupling grooves 1a serves as a main shaft of the processing machine. The two positioning posts are embedded so that the heavy cutting process can be carried out smoothly; the two cutter bars 2 as shown in Fig. 1(b) have no groove design on the circumferential surface, so the shaft weight is uniform and suitable for For high speed rotary machining.

It is known that the automatic tool change mechanism must have different tool holders in order to smoothly accommodate and hold the different types of tool holders. For example, in the case of the holder of the holder 1 shown in Fig. 1(a), a positioning member must be provided at the inner edge of the holder to be inserted into one of the coupling grooves 1a of the holder 1, in order to position the holder 1. Therefore, the next time the knife is taken smoothly; otherwise, the inner edge of the holder of the holder 2 shown in Fig. 1(b) does not require the positioning member. As can be seen from the above, each of the holders has its own specificity, and does not have interoperability with each other. If the arrangement of the holder and the holder is incorrect, there is a possibility that the holder cannot be stably held and the rod is released.

In view of the above, it is an object of the present invention to provide a tool holder device in which the tool holder is suitable for use with a shank having or without a coupling groove.

In order to achieve the above object, a tool holder device provided by the present invention comprises a base and at least one tool holder, the tool holder is detachably coupled to the base, and includes a second clamp arm extending out of the base a peripheral edge, the front ends of the two clamping arms are separated to form an opening for a cutter bar to enter and exit the tool holder, the two clamping arms are used for clamping the tool holder, and the tool holder has an abutting surface between the two clamping arms, The abutment surface is in contact with the arbor. The tool holder device further includes a top abutting member having an ejector end located between the two clamping arms and located in front of the abutting surface, the ejector end being pushed and retracted to The position where the abutment faces are aligned.

The effect of the invention is that when the tool holder clamps the shank having the coupling groove, the ejector end of the top abutting member is embedded in the coupling groove; when the tool holder is clamped with the arbor that does not have the coupling groove, the abutting member thereof The ejector end is pushed and retracted. This solves the problem that the possible tool holder and the tool bar configuration error are caused by the unstable clamping and the shank is loose.

〔this invention〕

100‧‧‧Tool holder

10‧‧‧ Pedestal

10a‧‧‧ top surface

10b‧‧‧ bottom

10c‧‧‧ fitting slot

10d‧‧‧first screw hole

10e‧‧‧Second screw hole

10f‧‧‧Positioning holes

12‧‧‧ ring frame

14‧‧‧ joint

14a‧‧‧ bearing surface

14b‧‧‧垣

20‧‧‧Knife holder

20a‧‧‧Abutment

20b‧‧‧ rib

20c‧‧‧ dimple

22‧‧‧ base

22a‧‧‧Perforation

22b‧‧‧Positioning column

24‧‧‧ clip arm

30‧‧‧First bolt

30a‧‧‧ head

40‧‧‧second bolt

50‧‧‧Parts

52‧‧‧ first body

52a‧‧‧ first hole

52b‧‧‧second hole

54‧‧‧Second body

54a‧‧‧Out of the end

1, 2‧‧‧Cutter

1a‧‧‧ joint slot

1b, 2a‧‧‧ ring groove

1(a) and 1(b) are perspective views of a cutter bar of a different structure.

2 is a perspective view of a tool holder device in accordance with a preferred embodiment of the present invention.

Figure 3 is a plan view of Figure 2.

Figure 4 is a cross-sectional view taken along line 4-4 of Figure 3;

Figure 5 is a perspective view of a tool holder of the tool holder device of the above preferred embodiment of the present invention.

6(a) and 6(b) are a perspective view and a side view of a top member of the tool holder device according to the above preferred embodiment of the present invention.

In order to explain the present invention more clearly, a preferred embodiment will be described in detail with reference to the drawings. Referring to FIG. 2 to FIG. 4 , a tool holder device 100 according to a preferred embodiment of the present invention includes a base 10 , two tool holders 20 , two first bolts 30 , two second bolts 40 and two tops . Defect 50. The base 10 includes a ring frame 12 and a joint 14 extending from two sides of the ring frame 12. The ring frame 12 is mounted on a rotatable shaft (not shown) which is symmetrical and provides a tool holder 20 detachably coupled thereto. The following is an example of the installation of one of the tool holders 20, a first bolt 30, a second bolt 40 and a top abutment member 50.

The base 10 has a top surface 10a and a bottom surface 10b opposite to each other. Each of the joints 14 has a recessed portion from the top surface 10a. The bottom of the recessed portion is a bearing surface 14a, and each side of the bearing surface 14a is a dam 14b. The bottom surface 10b of the base 10 is recessed to form a fitting groove 10c, and one end of the fitting groove 10c communicates with the side surface of the coupling seat 14. The base 10 further has a first screw hole 10d, a second screw hole 10e and two positioning holes 10f. The first screw hole 10d and the second screw hole 10e extend through the bearing surface 14a and the fitting groove 10c. The two positioning holes 10f penetrate the bearing surface 14a and the bottom surface 10b.

As shown in FIG. 5, the tool holder 20 of the present embodiment is formed by injection molding a composite material containing plastic, and includes a base body 22 and two clamp arms 24. The base 22 has a through hole 22a, and the bottom surface protrudes from the two positioning posts 22b. When the holder 20 is placed on the carrying surface 14a with its base 22, the two positioning posts 22b are aligned with the two positioning holes 10f of the base 10. Then, the tool holder 20 is fixed to the base 10 by the second bolt 40 passing through the through hole 22a and locked into the second screw hole 10e, and the tool holder 20 is subjected to the second gear. The limitation of the crucible 14b and the cooperation of the positioning post 22b and the positioning hole 10f cannot be arbitrarily left and right. It is worth mentioning that one end of the second bolt 40 is further exposed through the second screw hole 10e.

The two clamp arms 24 of the holder 20 are connected to the base 22 at one end and extend from the periphery of the base 10 at the other end. The two clamp arms 24 are slightly elastic, and the front ends are spaced apart to form an opening for a cutter bar to enter and exit the tool holder 20. The tool holder 20 defines an abutting surface 20a between the base body 22 and the two clamping arms 24, and a rib 20b is raised on the abutting surface 20a. Further, the holder 20 has a recess 20c formed concavely from the abutting surface 20a, the recess 20c being located in the direction in which the holder enters and exits the holder 20, more specifically, the recess 20c is located The base 22 is located below the rib 20b.

As shown in FIG. 6(a) and FIG. 6(b), the abutting member 50 is a rectangular elastic piece including a first piece 52 and a second piece 54 in this embodiment, in an application example. The shrapnel is made of spring steel plate. The shrapnel thickness is between 0.3 mm and 0.7 mm, and preferably 0.5 mm. The first piece 52 of the elastic piece is connected to the second piece 54 in an L shape, and the angle between them is an obtuse angle of 95 to 120 degrees. Further, the first body 52 has a first hole 52a and a second hole 52b, and one end of the second piece 54 constitutes an ejector end 54a.

When assembled, the first piece 52 of the elastic piece is embedded in the fitting groove 10c of the base 10, and the exposed end of the second bolt 40 protrudes into the second hole 52b; A bolt 30 passes through the first hole 52a from bottom to bottom, and then locks into the first screw hole 10d of the base 10, and presses the first piece 52 on a head 30a of the first bolt 30. At this time, the elastic piece is fixed to the base 10. The assembled elastic piece, the ejector end 54a of one end of the second piece 54 is located in the space surrounded by the base 22 and the two clamping arms 24, and is located in front of the dimple 20c. It is worth mentioning that the elastic piece is limited by the fitting groove 10c, and the first bolt 30 and the second bolt 40 provide a two-point positioning effect, and cannot be yawed to the base 10.

Hereinafter, the tool holder device 100 of the present embodiment will be applied to the holder 1 having the coupling groove 1a as shown in Fig. 1(a), or the holder 2 having no coupling groove as shown in Fig. 1(b). use. First, when the shank 1 or the shank 2 is clamped, the abutting surface 20a of the tool holder 20 of the present embodiment is in contact with the peripheral surface of the arbor, and the rib 20b is embedded in the shank circumference. In an annular groove 1b (or 2a) of the face to prevent the knife bar from falling. Of course, the peripheral surface of the arbor is not limited to the contact with the abutting surface 20a, and a slight spacing is required if necessary.

Referring to FIG. 2 to FIG. 4, in the process of displace the tool holder 20, a coupling groove 1a on the circumferential surface of the holder 1 faces the second piece 54 of the elastic piece, and When the shank 1 is clamped by the two clamping arms 24 and reaches the positioning position, the ejector end 54a of the second piece 54 is inserted into the coupling groove because it is not subjected to pressing or the pressing force is small. In the state of 1a, this situation helps the position of the holder 1 to be fixed, so that the knife can be smoothly taken next time. When the other holder 2 displaces the holder 20, since the holder 2 does not have the structure of the coupling groove, the ejection end 54a of the second piece 54 receives the pressing force from the holder 2 The deformation is retracted into the dimple 20c and is substantially aligned with the abutment surface 20a. Therefore, the arrangement of the tool holder 20 and the abutting member 50 in the embodiment can avoid the problem that the clamping of the tool holder 20 and the tool bar is not stable, resulting in the looseness of the tool bar, and is also suitable for the combination. The slot or the arbor without the coupling groove can be used for clamping, which can reduce the cost.

In the above, the base 10 only provides two tool holders 20 for installation. However, in practice, the base can also be a disc structure according to different processing machines, and the periphery thereof can be arranged for arranging a plurality of tool holders 20 .

The above description is only for the preferred embodiments of the present invention, and equivalent changes to the scope of the present application and the scope of the patent application are intended to be included in the scope of the present invention.

100‧‧‧Tool holder

10‧‧‧ Pedestal

10a‧‧‧ top surface

10b‧‧‧ bottom

10c‧‧‧ fitting slot

10d‧‧‧first screw hole

10e‧‧‧Second screw hole

10f‧‧‧Positioning holes

12‧‧‧ ring frame

14‧‧‧ joint

14a‧‧‧ bearing surface

14b‧‧‧垣

20‧‧‧Knife holder

22‧‧‧ base

22a‧‧‧Perforation

22b‧‧‧Positioning column

24‧‧‧ clip arm

30‧‧‧First bolt

30a‧‧‧ head

40‧‧‧second bolt

50‧‧‧Parts

1, 2‧‧‧Cutter

1a‧‧‧ joint slot

Claims (9)

A tool holder device includes a base and at least one tool holder, the tool holder is detachably coupled to the base, and includes two clamping arms extending from a periphery of the base, the front ends of the two clamping arms being separated Forming an opening for a cutter bar to enter and exit the tool holder, the two clamp arms are for clamping the cutter bar, and the tool holder has an abutting surface between the two clamp arms, the abutment surface is in contact with the cutter bar; The utility model is characterized in that it comprises a top abutting member, the top abutting member has an ejector end located between the two clamping arms and located in front of the abutting surface, wherein when the arbor entering the tool holder has a coupling groove The ejector end of the abutting member is embedded in the coupling groove. When the shank entering the tool holder does not have a coupling groove, the ejector end is retracted by the arbor and is retracted to be aligned with the abutting surface. position. The tool holder device of claim 1, wherein the tool holder has a recess formed concavely from the abutting surface, the dimple being located in a direction in which the tool bar enters and exits the tool holder; the top abutting member includes a spring piece The spring piece is fixed to the base at one end, and the other end constitutes the ejector end, and the ejector end is retracted into the recess when being pressed. The tool holder device of claim 2, wherein the elastic piece comprises a first piece body and a second piece body, wherein the first piece body and the second piece body are connected by an obtuse angle, wherein the first piece is connected The sheet body is fixed to the base, and the second sheet body is located in front of the abutting surface of the tool holder and has the ejector end. The tool holder device of claim 3, comprising a first bolt; wherein the base has a bottom surface and a fitting groove formed by the bottom surface, and a first screw hole is located at the bottom of the fitting groove The first piece of the elastic piece is embedded in the fitting groove, and the first piece has a first hole for the first bolt to pass through and lock into the first screw hole. The tool holder device of claim 4, comprising a second bolt; wherein the base has a bearing surface opposite to the bottom surface thereof and a second screw hole, the second screw hole penetrating the bearing surface a groove bottom of the fitting groove; the holder is placed on the bearing surface and has a through hole; the first piece of the elastic piece further has a second hole; the second bolt passes through the holder After being perforated and locked into the second screw hole, the second hole is protruded into the second hole of the first piece. The tool holder device of claim 5, wherein the base further has at least one positioning hole on the bearing surface thereof; the bottom surface of the tool holder has at least one positioning post, and the positioning post is inserted into the positioning hole. The tool holder device of claim 3, wherein an obtuse angle between the first body and the second body is between 95 and 120 degrees. The tool holder device of claim 3, wherein the first sheet and the second sheet have a thickness of between 0.3 mm and 0.7 mm. The tool holder device of claim 2, wherein the tool holder is injection molded from a composite material comprising plastic.