JPS5851005A - Clamping device of tool - Google Patents

Abstract

PURPOSE:To smoothly tighten and loosen a tool, by screwing a stepped bolt into a diagonally provided clamping hole with a stepped difference and always applying stable force of tightening to the tool. CONSTITUTION:A tool 14 is set by positioning adjustment, and then a member, in which a stepped bolt 18 is inserted into a piece 17, is inserted into a diagonally provided clamping hole with a step difference, and fixed by screwing an external thread 18a in the point end of the stepped bolt 18 to an internal thread 16b in the clamping hole 16. Further the stepped bolt 18 is rotated, if its tightening is continued, component force, generated by a slope of the clamping hole 16, is transmitted to the tool 14 through the piece 17, and the tool 14 is tightened and fixed by downward pressing force of the piece 17.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a bite clamp device for general machine tools. In contrast to the blade anastomosis conventionally provided in a position opposite to the headstock to which a workpiece of lathes and other machine tools is fixed. When firmly fixing various cutting blades, that is, cutting tools,
), and as shown in the cross-sectional view of (b), insert the tool 3 into the tool insertion hole 2 provided in the tool holder 1, and then insert the round piece 5 into the clamp hole 4 at the top of the tool. When mated, K.

Insert the tightening bolt 7 into the screw hole 6 made in the round frame 5.
The i*m element 7' at the tip of the tightening bolt 7 is screwed into the female screw 1' on the side of the tool holder 1, and the tightening force of the tightening box 7 is applied to the screw hole. 6 is transmitted to the round piece 5 as a component force generated by the inclination of the round piece 5, and as a downward pressing force of the round piece 5, the cutting tool 3 is tightened and clamped. As shown in (a), it is necessary to provide the same clamp mechanism at two locations, and the bite 5 due to both clamp mechanisms is required.
The clamping force of both clamp mechanisms is required to be uniform. If the clamping force of both clamp mechanisms is uneven, it will not be possible to maintain the balance of the cutting tool 5 well, resulting in an unstable condition. Therefore, the tightening strength of both tightening bolts 7.7 should always be maintained at a constant level, since there is a risk of causing problems in machining accuracy and operation soil when cutting the workpiece as it is. In addition to this, it is essential that the bolt 7.7 is tightened very tightly, and when the tightening bolt 7.7 is loosened due to replacement of the cutting tool or other requests, the bolt 7.7 with the - and the bolt 5 may bite into each other. The tool holder also has the disadvantage of not being able to be loosened smoothly, so it can be said that the construction of the tool holder leaves a drawback that users are having trouble with. The purpose is to eliminate various drawbacks, and to realize a tool clamping device that has stable and well-balanced tightening force on the tool, and allows for extremely smooth tightening and loosening operations. In order to achieve the above purpose,
A piece with a stepped inclined clamp hole provided with a threaded portion at one inner end thereof is provided in the tool holder, and one end of the piece forms a horseshoe-shaped cross section, and a nine-step bolt is inserted into the piece, and the stepped inclined clamp hole is inserted into the piece. The present invention aims to provide a tool clamping device which is characterized in that it clamps a tool tool located at the lower part of the piece by inserting a screw into the tool.Examples of the present invention will be described below with reference to the drawings. ◎ 11 is a cutting tool holder, which is fixed to the turret 13 with bolts 12 and 12. ◎ 14 is a cutting tool. Then insert the tool insertion hole 1 in the tool holder 11.
5 and is fixed in place. 15m is a bolt for setting the bite position.

A stepped inclined clamp hole 16 serves as a special feature for the tool holder 11 located IBK above the cutting tool 14. The stepped inclined clamp hole 16 has a substantially circular front face, and a diameter 0 hole portion 16 m smaller than the middle part. The force is the seri, and the tip is the female screw 1.
4b is engraved so that the tip of the bolt described later can be screwed into the stepped inclined clamp hole 16, a piece 17 whose one end has a horseshoe-shaped cross section, and a stepped bolt inserted into the wrinkled piece 17. 18 is inserted, and the male screw 18m carved at the tip of the stepped bolt 18 is inserted into the stepped inclined clamp hole 1.
It is screwed together with a female screw 16b provided at the tip of 6.

Figure 4 shows the stepped bolt 1 whose one end cross section forms a horseshoe shape.
(2) Perspective view showing the inserted state of B and (2) Perspective view of piece 17, (Q Perspective view of stepped bolt 1B. @ is also provided with a hexagonal hole 18b, and with a wrench etc.
b is configured so that it can be rotated.

The lower side of the electrically shaped part of the piece 17 is divided into parts 17m and 17b, and by contacting and pressing the cutting tool 14, the same effect as when clamped at two places is produced. Case 17! It is amazing that the clamping forces of 1 and 17b are equal. When using the tool clamping device according to the present invention, first set the tool 14 and adjust the position, and then
7, insert the stepped port 18 into the stepped inclined clamp hole -6^, and connect the male screw 18 at the tip of the stepped bolt 1B with the female screw 1db in the stepped inclined clamp hole 16. When screwed together and continued to be fixed, the component force generated by the inclination of the stepped inclination clamp will be transmitted through the piece 17) 14
K is transmitted, and the piece 17 acts as a downward pressing force to tighten and fix the bite 14. At this time, the piece 17 is separated into two pieces with a horseshoe-shaped cross section at the contacting part. Because of the shape, the component force caused by the inclination is applied to the lower side 17117b of the piece 17 as described above.
Since the cutting tool 14 is equally divided and pressed, the tooling tool 14 receives the effect of being supported at two points due to the even component force, and can maintain an extremely well-balanced storm or ramp state.Additionally, from an operational perspective. It also has the advantage that it does not require complicated operations such as tightening and fixing separately by using two round pieces that can be used in conventional equipment. When loosening the stepped bolt 18 for replacement, loosen the stepped bolt by inserting a wrench into the hexagonal hole 18b provided at the tip of the stepped bolt 18 in the opposite direction to the tightening direction. This allows for rotational force that could not be obtained with conventional rotational tightening from the - direction, allowing extremely good operation not only when clamping the tool but also when replacing it. ◎ As described in detail above, the tool clamping device according to the present invention not only provides well-balanced and stable tool clamping performance, but also reduces the tightening and loosening of stepped bolts when replacing tools. It provides a mechanism that allows extremely smooth tightening, and when the cutting tool is long, the setup operation time is shorter than using multiple devices of the present invention, and the same tightening effect as before can be obtained. , which can be used in the turrets of various machine tools to great effect.

[Brief explanation of drawings]

Figure 1 is a front view and (B) side sectional view showing a conventional tool clamp device, and Figure 2 is a perspective view showing an embodiment of the present invention. ...Bolt, 15.
...Turret, 14...Bite, 15...Bite insertion hole, 16...Stepped inclined clamp hole, 17...Piece, 18...Stepped bolt Patent applicant Hitachi Seiki Co., Ltd. No. 1 (a) Figure (b). Figure 3

Claims (2)

[Claims] (1) Inside - A piece with a stepped inclined clamp hole with a deep threaded part inserted into the tool holder, one end of which has a horseshoe-shaped cross section, and a stepped bolt inserted into the piece.
A tool clamp device, characterized in that the tool is screwed into the stepped inclined clamp hole to clamp a tool located at the bottom of the piece. (2) The stepped bolt inserted into the piece has holes for tightening and loosening that are compatible with a wrench or a screwdriver at the front end and at the rear 1m11 of the bolt. Bite clamp device 0 described in )