JP2002028835A - Tool extracting tool for machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tool extracting tool that in a machine tool with a tool pot type tool magazine, is structurally simple and inexpensively manufacturable, keeps sufficient strength and is free of inoperativeness due to yielding, and is applicable even when a toolholder end face and a front tool pot end face have no or only a narrow clearance in between for a two to three face-bound tool. SOLUTION: The main part of the tool extracting tool 1 comprises an attachment 2 with an engaging portion 2a capable of engagement with a V-groove 21 in a flange part of a toolholder 20 held at an end of a tool pot 10, a forked (U-shaped head) handle 4 for holding the attachment 2 turnable via a pair of pins 3, and a cam follower 6 held rotatable via a cam follower block 5 fixed to a fork portion 4f of the handle 4 so as to be brought into rolling contact with the end face of the tool pot.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool extracting tool for a machine tool having a tool pot type tool magazine.

[0002]

2. Description of the Related Art A tool removing operation of a machine tool provided with a tool magazine of a tool pot type has conventionally been performed as follows. (A) A method of inserting a fork-shaped tool extraction tool into a gap between the end surface of the tool pot and the end surface of the tool holder and extracting the tool from the tool pot using the principle of leverage. (B) A method in which the tool holder is pushed out from the rear end of the tool pot by a fluid pressure cylinder or the like.

[0003]

The tool extracting method of the above item (A) has the following problems. (1) In the two-face or three-face constraint tool, the tool holder end face and the spindle end face are brought into close contact with each other in order to increase the coupling rigidity between the spindle and the tool holder. If the removal tool is inserted and removed, the end face of the tool holder may be damaged and the coupling rigidity and rotation accuracy of the tool may be impaired. (2) If the tool holder end face and the tool pot end face are in close contact with each other or if there is only a small gap between them, the tool extraction tool cannot be used, so the tool holder must be pulled out from the tool pot by hand. There was a safety problem. (3) Since the tool extraction tool is inserted into the gap between the tool holder end face and the tool pot end face, the thickness of the tool extraction tool is thin, and the tool extraction tool yields due to lack of strength, and often becomes unusable. .

[0004] The tool removal method of the above item (B) has the following problems. (A) It is difficult to attach a hydraulic cylinder or the like to a small machine tool. (B) Not applicable to hollow shank tool holders without pull stud bolts. (C) The structure is complicated and the manufacturing cost is high.

Therefore, the present invention solves the above-mentioned problems of the prior art, and enables the tool removing operation of a machine tool having a tool pot type tool magazine to be manufactured with a simple structure at a low cost, and that the strength of the tool is sufficiently improved. It can be used even if there is no gap or only a small gap between the tool holder end face and the tool pot end face, such as a two-face or three-face restraint tool, without yielding and becoming unusable. An object is to provide a tool extraction tool for a machine tool.

[0006]

According to a first aspect of the present invention, there is provided a tool extracting tool for a machine tool having a tool pot type tool magazine, comprising a two-link mechanism. A tool extracting tool for a machine tool, wherein a tool is extracted by leverage using a V-groove of a flange portion of a tool holder as an operating point, a fulcrum for moving an end face of a tool pot, and a base of a handle as a power point. .

With the above construction, the V-groove of the flange portion of the tool holder is used as the point of action and the end face of the tool pot is used as a fulcrum. Applicable even when there is no gap or only a narrow gap with the end face, the thickness of each component of the tool extraction tool can be increased and the strength of the tool extraction tool can be sufficiently obtained, so the life of the tool extraction tool can be extended. It can be long enough. Further, the structure of the tool extracting tool is simple, and the manufacture is easy. Furthermore, since the V-groove of the flange portion of the tool holder is used as the point of action, there is no danger of damaging the end face of the tool holder. Furthermore, since the tool is provided with a two-link mechanism and the lever is used to remove the tool, the tool can be easily removed with a small force.

According to a second aspect of the present invention, which has solved the above-mentioned problem, in the first aspect, an engaging portion is provided for engaging with a V-groove of a flange portion of a tool holder held at an end of a tool pot. An attachment, a fork-like handle (a tip part is formed in a U-shape) for rotatably holding the attachment via a pair of pins, and a cam follower block fixed to the fork of the handle. And a pair of cam followers rotatably held through the end of the tool pot and abutting against the end face of the tool pot.

According to the second aspect, the V-groove of the flange portion of the tool holder is used as a point of action, the end surface of the tool pot (the point of contact with the outer peripheral surface of the cam follower) is used as a fulcrum, and the handle of the tool extracting tool is held. The tool can be pulled out by the leverage with the base portion as a power point, and the same operation as the operation of the first aspect is achieved.

A method for extracting a tool from a machine tool provided with a tool magazine of a tool pot type using a tool extracting tool configured as in the second aspect is provided by a flange portion of a tool holder held at an end of the tool pot. Engaging the pair of left and right engagement portions of the attachment with the V-groove of the attachment, and abutting the cam follower against the end face of the tool pot, and pressing the base of the fork-shaped handle to move the cam follower along the end face of the tool pot. Removing the tool holder with the attachment engaged with the V-groove from the tool pot while rolling, even if there is almost no gap between the tool holder end face and the tool pot end face, securely and safely. The tool holder can now be removed. As a result, the step of inserting into the gap as in the case of a conventional thin flat fork-shaped tool removing tool is not required, and the end face of the tool pot is not damaged and the tool itself is not damaged.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a tool extracting tool for a machine tool according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front view showing a state in which a tool extracting tool according to an embodiment is set between a tool holder and a tool pot, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a top view of an attachment. FIG. 4 is a side view showing the process of extracting the tool holder from the tool pot using the tool extraction tool of the present embodiment, together with the tool pot and the tool holder.

As shown in the figure, the tool extracting tool 1 of the present embodiment has an engaging portion 2a which engages with a V groove 21 of a flange portion of a tool holder 20 held at an end of a tool pot 10. Attachment 2, and a fork-shaped (a U-shaped tip) handle 4 for rotatably holding the attachment 2 via a pair of pins 3, 3.
And a cam follower 6 rotatably held via a cam follower block 5 fixed to a fork portion (U-shaped portion) 4f of the handle 4 and abutting and rolling on the end face of the tool pot. The main part is configured.

The engaging portion 2a of the attachment 2 in the present embodiment is formed as a trapezoidal projection so as to engage with half the circumference of the V-groove 21 of the flange portion of the tool holder 20, but it is not necessarily formed on the half circumference. It need not be formed to engage.

A pair of right and left cam follower blocks 5 are fixed by bolts 7 so that the fork portion 4f of the handle 4 is opposed to the tool pot end face 10a at the base side of the handle 4 with respect to the pins 3 and 3 respectively. Have been. The cam follower 6 is rotatably held by a pin 9 having a threaded portion at the tip at a position spaced apart from the pin 3 of the cam follower block 5 by a predetermined distance, and is screwed to the tip of the pin 9. The nut 9a prevents it from falling off.

Next, the operation of the embodiment of the tool extracting tool configured as described above and a tool extracting method using the tool extracting tool 1 will be described. (1) As shown in FIG. 2, the trapezoidal projection 2 a of the attachment 2 of the tool extracting tool 1 is
The outer peripheral surface of the cam follower 6 is brought into contact with the end surface 10a of the tool pot 10 by engaging with the groove.

(2) In the state shown in FIG. 2, hold the base of the handle 4 of the tool extracting tool by hand and push it in the direction of arrow a. Then, the V-groove 21 in the flange portion of the tool holder 20
Is used as a point of action, the end face 10a of the tool pot 10 as a fulcrum, and the base of the handle 4 as a point of force, the tool holder 20 is pulled out of the tool pot 10 by leverage (see FIG. 4). At this time, the cam follower 6 moves upward while rolling on the end surface 10a of the tool pot 10, and the fulcrum (the contact point between the outer peripheral surface of the cam follower 6 and the end surface 10a of the tool pot 10) also moves upward. Therefore, unlike the conventional tool extracting tool which may damage the end face 10a of the tool pot 10 without moving the fulcrum, there is no possibility of damaging the end face 10a of the tool pot 10.

Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment. The present invention is not limited to this. Fulcrum that moves the end face of
The present invention is applicable to any tool that pulls out the tool by leverage with the base of the handle as a power point.

[0018]

The present invention has the following excellent effects. When performing tool extraction work on a machine tool equipped with a tool pot type tool magazine, (1) the tool extraction tool can be manufactured at a low cost with a simple structure, yields sufficient strength and becomes unusable due to yielding Nor. (2) Even if there is no gap or only a narrow gap between the tool holder end face and the tool pot end face as in a two-face or three-face restraint tool, the tool holder end face is not damaged. (3) Since the leverage principle is used, the tool can be easily extracted with a small force.

[Brief description of the drawings]

FIG. 1 is a front view showing a state where a tool extracting tool according to an embodiment of the present invention is set between a tool holder and a tool pot.

FIG. 2 is a side view of FIG.

FIG. 3 is a top view of the attachment.

FIG. 4 is a side view showing a process of extracting the tool holder from the tool pot using the tool extracting tool of the present embodiment, together with the tool pot and the tool holder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tool extraction tool 2 Attachment 2a Engagement part 3 Pin 4 Handle 4f Fork part 5 Cam follower block 6 Cam follower 10 Tool pot 10a End face 20 Tool holder 21 V groove

Claims (2)

[Claims] 1. A tool extracting tool for a machine tool having a tool pot type tool magazine, comprising a two-link mechanism, moving a V-groove of a flange portion of a tool holder, and moving an end face of a tool pot. Fulcrum, the base of the handle as the emphasis,
A tool extraction tool for a machine tool, wherein the tool is extracted by leverage. 2. A tool extracting tool for a machine tool having a tool pot type tool magazine, comprising: an attachment having an engaging portion which engages with a V groove of a flange portion of a tool holder held at an end of the tool pot. A fork-shaped handle rotatably holding the attachment via a pair of pins, and a tool follower rotatably held via a cam follower block fixed to the fork portion of the handle. 2. A tool extracting tool for a machine tool according to claim 1, further comprising: a pair of cam followers rolling in contact with end faces of the tool.