JPH11123613A - Gripping device for work tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably prevent generation of a defective generated in the final stage of work by slidably installing a support main body in the shaft direction through an elastic member on an installing member to be installed in a work machine. SOLUTION: A support main body 20 fitted to a front half part of a slide bar 10, can retreat against a spring 24 when shaft directional force acts by the coil spring 24 interposed between a rear end surface 31 of a tool holding body 30 to be installed in a large diameter part 25 on its tip and a tip surface 16 of the slide bar 10. An attachment 50 for a die is fitted from the tip in the tool holding body 30 installed in the support main body 20, and when an installed die 50 is slightly pushed against a work chucked to a main spindle of a lathe, the die 50 familiarly contacts with the work by the coil spring 24. Next, while rotating the work in this condition, required screw cutting work is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gripping device for a working tool used in a lathe or a drilling machine.

[0002]

2. Description of the Related Art When a workpiece is threaded by using a die or a tap, the work is fixed to a chuck of a lathe and the core is pressed while rotating in order to reduce an operator's labor associated with a screw diameter. 2. Description of the Related Art Threading is performed while a threading tool such as a die or a tap held on a table is moved toward a workpiece.

However, when such a machining method is employed, if the feed amount of the thread cutting tool becomes large in the final stage of machining, the thread cutting tool hits the end face of the work and a large amount of work is transferred from the work to the thread cutting tool. As a result of the torque, the workpiece and the threading tool may be damaged, and due to this, the feed amount of the threading tool is insufficient at the final stage of machining and the thread of the workpiece is incomplete. It also creates defective products.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem.
An object of the present invention is to provide a new processing tool holding device that does not cause the above-mentioned inconvenience even in the final stage of processing.

[0005]

That is, in order to achieve the above object, the present invention provides an elastic member for a mounting member mounted on a processing machine as a gripping device for a processing tool used in a processing machine such as a lathe. A support body is slidably mounted in the axial direction through the support body, and a grip portion for chucking a working tool is provided on the support body.

[0006]

Embodiments of the present invention will be described below. Fig. 1 shows the case of performing die work on a lathe.
FIG. 2 shows an embodiment of the present invention in the case of performing a tap operation on a lathe.

In the drawing, reference numeral 10 denotes a slide bar for transmitting the rotation of the spindle 1 to a die or a tap supported at the tip, and a rear end portion 11 of the slide bar 10 can be fitted in the tapered hole 2 of the spindle 1 closely. It is formed in a tapered shape as much as possible, and a tongue 12 for a slide bar is screwed to this end.

The slide bar tongue 12 has a structure shown in FIG.
As shown in the figure, a slanted screw hole 13 is formed, and at the time of tapping operation with a drilling machine, a metal shell portion 15 at the tip of a screw 14 screwed into the screw hole 13 is equidistant inside the spindle 1. It is configured so that it can be firmly fixed by being in contact with the inner wall of the hole 3.

The front half of the slide bar 10 is axially slidably inserted into a cylindrical support body 30. This part is integrated with the support body 20 during drilling work. A fitting hole 17 into which the tip of a fixing screw 21 screwed into the fitting hole is fitted is formed, and an axial direction provided on the support body 20 is provided so that it can escape in the axial direction at the time of tapping work with a lathe. A bolt 18 slidably engaged with a long hole 22 of
Work and tap attachment 56 after tapping is completed
In order to reduce the frictional force caused by biting, a pin 19 that engages with a slide groove 23 provided in the support body 20 is implanted.

On the other hand, the support body 20 fitted on the front half of the slide bar 10 is located between the rear end face 31 of the tool holder 30 attached to the large-diameter section 25 at the front end and the front end face 16 of the slide bar 10. Is configured to be able to retreat against the spring 24 when a force in the axial direction is applied by the coil spring 24 interposed between the slide bar 10 and the body of the support body 20. An elongated hole 22 guided by the bolt 18 and the pin 19 implanted in the hole 22 and a slide groove 23 are provided.

On the other hand, the tool holder 30 for holding the die 50 and the tap 55 is fitted into a step 27 provided on the distal end surface 26 of the support member 20 and has a common axial through hole 28, It is integrally mounted by a mounting bolt 40 inserted through the base 31.

As shown in FIG. 1 (b), the tool holder 30 has a C-shape having a slit 32 on a part of its peripheral surface, and is screwed so as to clamp the slit 32. It is configured to fix a C-shaped metal 34 made of gunmetal with a bolt 33 by reducing the diameter thereof.
A bolt 35 for preventing rotation is screwed into the tool holder 30. When a large-diameter thread is cut, the bolt 35 is tightened, so that the die attachment 51 is further strengthened by a gunmetal 36 at the tip. It is configured so that it can be fixed to. Reference numeral 38 in the figure denotes a detent pin that is screwed between the support main body 30 and the metal 34 to suppress blind movement of the metal 34.

The tool holder 30 is formed for dies and taps. The tool holder 30 for dies is shown in FIG.
As shown in (a), the attachment 5 fixed to the tip of the tool holder 30 by reducing the diameter of the metal 34.
The fitting 50 is configured to fit the die 50 into the fitting recess 52, and to prevent the die 51 from rotating by a screw 54 screwed onto the peripheral surface. The tool holder 30 for tapping is shown in FIG. As shown in FIG. 3, the metal attachment 34 is gripped and fixed by reducing the diameter of the metal 34, and the taps 55 are prevented from coming off and rotating by the screws 57 screwed from the peripheral surface of the attachment 56. Is configured. The reference numeral 41 in the drawing indicates a detent pin for the mounting bolt 40.

Next, each working mode of the apparatus configured as described above will be described. When performing the die work by using a lathe, first, the fixing screw 21 is loosened so that the support body 20 and the slide bar 10 can slide in the axial direction. Is inserted into the tapered hole 2 of the spindle 1 of the lathe tailstock, and these are joined by friction to be integrated.

Next, the die attachment 50 is inserted into the tool holder 30 attached to the support body 20 by the attachment bolt 40 from the tip, and the fastening bolt 33 is inserted.
The diameter of the tool holder 30 is reduced by tightening the torso 53 of the attachment 51, and the attachment 51
The required die 50 is fitted into the hole and is stopped by the screw 54.

When the die 50 assembled as described above is lightly pressed against the workpiece chucked on the main shaft of the lathe, the die 50 comes into good contact with the workpiece by the coil spring 24. Perform necessary thread cutting while rotating.

When the required threading is completed, the work may be reversed to release the screwing of the die 50. At this time, the work and the die 50 are strongly bitten by friction due to the elastic action of the coil spring 24 and come off. In the case where the workpiece is lost, the spindle 1 is moved by the length of the long hole 22 to separate the work and the die 50 by moving the support body 20 in a direction in which the support body 20 is removed by a handle (not shown) provided on the tailstock of the lathe. be able to.

On the other hand, in order to perform a tapping operation with a lathe, an attachment 56 to which a required tap 55 is attached is fastened and fixed to the tool holder 30 by a fastening bolt 35 as shown in FIG.

When the tap 55 is pressed against the rotating work in this state, the tap 55 bites into the work according to the screw lead, and the tapping is automatically performed.
When the tapping is completed in this manner, the end face of the attachment 56 comes into contact with the work and idles, so that damage on the tap 56 side is avoided. Then, the tap 55 can be removed by reversing the work. In the case where the work has been bitten, the work may be separated by the same operation as described above.

On the other hand, when a tapping operation is performed with a drilling machine, the slide bar 10 is inserted into the spindle 1 of the drilling machine main spindle, so that the metal shell portion 15 of the screw 14 screwed into the oblique screw hole 13 of the tongue 12 is tapered. The slide bar 10 is firmly fixed in contact with the inner wall of the hole 3 having the same diameter following the hole 2.

Then, in this state, the tap 55 attached to the attachment 56 is brought into contact with the rotating work to perform thread cutting, and after the machining is completed, the end face of the attachment 56 comes into contact with the work. , And the tap 55 can be released from the work by pulling up the spindle 1.

Further, when a window is opened with a lathe and a drilling machine, the tip of the fixing screw 21 is fitted into a fitting hole 17 provided on the peripheral surface of the slider 10 by screwing the fixing screw 21 so that the slider 10 is engaged with the slider 10. The support body 20 was prevented from sliding in the axial direction, and in that state, as shown in FIG. 3, a required drill 60 was attached to another drill attachment 61 that was tightened and fixed by the tightening bolt 35. An arbitrary window opening operation is performed by fitting the member 62.

[0023]

As described above, according to the present invention, an abutment member for supporting a processing tool is slidably mounted in an axial direction on a member mounted on a processing machine such as a lathe via an elastic member. Therefore, even if excessive feed occurs to the machining tool in the final stage of threading work using a lathe, etc., it is possible to prevent the workpiece and the machining tool from abutting strongly and prevent them from being damaged, It is also possible to reliably prevent the occurrence of defective products at the final stage.

In addition, since the engaging member that engages with the fitting hole provided in the mounting member is attached to the above-mentioned supporting member so as to be able to freely move in and out, the two members are held non-slidably in the axial direction. Can also be provided with a drilling function at the same time.

[Brief description of the drawings]

FIGS. 1 (a) and 1 (b) are a side view of an apparatus according to an embodiment of the present invention and a cross-sectional view taken along line AA, showing a state of a die operation.

FIG. 2 is a side view of the same device showing a state in a tapping operation.

FIG. 3 is a side view of a main part of the same device showing a state in a drilling operation.

[Explanation of symbols]

 Reference Signs List 1 spindle 10 slide bar 12 tongue for slide bar 17 fitting hole 20 support body 21 fixing screw 22 long hole 24 coil spring 30 tool gripper 34 reduced-diameter metal 50 dice 51, 56 attachment 55 tap 60 drill

Claims (4)

[Claims] 1. As a gripping device for a working tool used in a processing machine such as a lathe, a supporting body is slidably mounted in an axial direction via an elastic member on a mounting member to be mounted on the processing machine. A gripping device for a processing tool, further comprising a gripper for chucking the processing tool. 2. The apparatus according to claim 1, wherein the mounting member and the support body are slidably coupled in the axial direction via a guide elongated hole extending in the axial direction and a pin member engaged with the guide elongated hole. The gripping device for a processing tool according to claim 1. 3. A fitting hole provided in a corresponding portion of the mounting member is fitted to a part of a peripheral surface of the support body to hold the support body and the mounting member so as not to slide in the axial direction. The gripping device for a processing tool according to claim 1, wherein the engaging member is provided so as to be able to enter and exit. 4. The method according to claim 1, wherein the supporting member is provided with a gripping member for a processing tool having a slit, and a screw member acting on the slit to reduce the diameter of the gripping member is provided. Item 2. A gripping device for a processing tool according to Item 1.