JP3152267U - Collet chuck - Google Patents

Abstract

An object of lathe machining is appropriately gripped regardless of the outer shape and diameter, and is disposed at the center of a position where the object of lathe machining is machined. A collet chuck A includes a substantially annular fastening member 2 having a plurality of recesses 4 on an inner periphery 8 and a radial cut 20 extending from the inner periphery 8 to the outer periphery where the recesses 4 are not provided. It consists of a plurality of jigs 3 that abut and grip the object 1 at the front end, and the front end of each jig 3 is formed to fit the outer periphery of the object 1. The rear end portion 6 of each jig 3 is fitted into each concave portion 4 of the substantially annular fastening member 2 so that the front end portion faces the center direction of the substantially annular fastening member 2. The objects 1 to be lathe are gripped with each other. [Selection] Figure 1

Description

  The present invention relates to a collet chuck that is fitted to a chuck of a lathe machine or the like and grips an object to be turned.

  Conventionally, a collet chuck has been used to hold a lathe object. The conventional collet chuck grips the object to be turned by almost the entire inner surface (large contact area) of the cylinder divided into three parts, so that the object is not easily scratched, and thin pipes, copper, silver, Suitable for gripping soft materials such as aluminum and already finished parts.

  However, if the diameter of the object to be turned is large, each end of the three-piece piece of the collet chuck and the object are damaged. On the other hand, if the diameter of the object is small, the central portion of the three-piece piece of the collet chuck is damaged. In addition, depending on the outer shape of the lathe processing object, such as when the outer shape of the lathe processing object is an ellipse or a trapezoid, the conventional collet chuck may not be able to properly grip. Therefore, in order to properly hold the object and place it at the center of the position where the object is processed, the inner peripheral shape of the collet chuck, etc. for each object according to the outer shape and diameter of the object. It was necessary to process.

  Therefore, the present invention takes the above-described conventional technology into consideration, and appropriately holds a lathe object to be processed regardless of the outer shape and diameter of the object and arranges it at the center of the position to be processed. An object is to provide a collet chuck.

In order to achieve the object, according to the invention of claim 1, in a collet chuck for gripping a lathe object,
The collet chuck is provided with a plurality of recesses on the inner periphery, and a substantially annular fastening member having a radial cut from the inner periphery to the outer periphery where the recess is not provided,
The front end portion comprises a plurality of jigs that contact and grip the object,
The front end portion of each jig is formed to fit the outer periphery of the object, and the substantially annular fastening member is arranged such that the front end portion of each jig faces the central direction of the substantially annular fastening member. A rear end portion of each jig is fitted in each of the recesses, and a collet chuck is used to hold the objects to be turned on each other at the front end portions of the jig.

  In the invention of claim 2, the collet according to claim 1, wherein a convex portion is provided at a rear end portion of each jig, and each convex portion and each concave portion of the substantially annular fastening member are fitted. A chuck was used.

In the invention of claim 3, in a collet chuck for gripping a lathe object,
The collet chuck includes a substantially annular fastening member having a radial cut from the inner periphery to the outer periphery,
It has a similar inner circumference slightly larger than the outer circumference of the object, and comprises a jig having a radial cut from the inner circumference to the outer circumference,
The jig is a collet chuck that is fitted to the inner circumference of the substantially annular fastening member, and the object is fitted to the inner circumference of the jig.

The device of claim 4 is an auxiliary tool joined to the substantially annular fastening member,
The auxiliary tool has a disc shape and has an outer periphery substantially the same as the outer periphery of the substantially annular fastening member, and an abutting portion that comes into contact with the substantially annular fastening member on a concentric circle;
A cylindrical bearing provided on one side of the contact portion;
A shaft member,
A through hole into which the shaft member can be inserted is provided in the center from the contact portion to the bearing portion, and the shaft member can be fixed at any position of the through hole. The collet chuck described in any one of 3 was used.

  According to the first to fourth aspects of the present invention, the collet chuck is composed of a substantially annular fastening member and a plurality of jigs. Regardless of the diameter, it can be appropriately held by the collet chuck, and a lathe can be processed by placing the object at the center of the processing position.

  In particular, in the invention according to claim 2, since a convex portion is provided at the rear end portion of each jig, and the convex portion and the concave portion of the substantially annular fastening member are fitted, the fitting force Can be reliably fitted, and the jigs can be prevented from being detached from the substantially annular fastening member during the lathe processing.

  In particular, in the invention of claim 3, the collet chuck is composed of a substantially annular fastening member and one jig, and has a similar inner periphery slightly larger than the outer periphery of the object to be turned, Since it is configured to grip the object to be turned, if you prepare jigs with various inner peripheral shapes in advance, the outer shape that is difficult to grip, such as when the cross-sectional shape of the object to be turned is oval or trapezoidal Even so, it can be appropriately held by the collet chuck, and a lathe can be processed by placing the object at the center of the position to be processed.

  Further, in the invention of claim 4, by adopting a configuration in which the auxiliary tool is joined to the substantially annular fastening member, the auxiliary tool plays a role as a stopper, and the lathe processing target is appropriately set at the front and rear positions. And an appropriate lathe process can be applied to an appropriate portion of a short object or a long object.

  In a collet chuck for gripping an object to be turned, the collet chuck of the present invention has a plurality of recesses on the inner periphery, and a substantially annular shape having a radial cut from the inner periphery to the outer periphery where the recess is not provided. A fastening member and a plurality of jigs that abut and grip the object at the front end, and the front end of each jig is formed to fit the outer periphery of the object, The rear end portions of the jigs are fitted into the concave portions of the substantially annular fastening member so that the front end portions of the jig are directed toward the center of the substantially annular fastening member. In this case, the lathes can be properly gripped regardless of the outer shape and diameter, and the lathes can be placed at the center of the position where the object is machined. Can be processed

  1 (a) is a front view showing a state in which a lathe 1 is fitted to a collet chuck A according to the present invention, and FIG. 1 (b) is a right side view showing the same state. is there. Three jigs 3 are detachably fitted to the inner periphery of the substantially annular fastening member 2. Then, the lathe object 1 is held at the approximate center of the collet chuck A by the three jigs 3.

  FIG. 2 is a front view showing the substantially annular fastening member 2. Concave portions 4 are provided at three locations on the inner periphery 8 of the substantially annular fastening member 2. Further, cuts 19 and 20 are provided at equal intervals from the inner periphery 8 toward the outer periphery of the portion where the recess 4 is not provided, and in particular, the cut 20 extends from the inner periphery to the outer periphery. These notches 19 and 20 are play for tightening when the collet chuck A is mounted on a lathe in a state where the object 1 to be lathe is gripped by the jig 3. FIG. 3 is a front view showing three jigs 3. As shown in FIG. 1A, the front end portions 5 of the jigs 3 hold the front end portions 5 of the three jigs 3 and hold the objects 1 to be turned together. Therefore, it is necessary to form the front end portion 5 so that the front end portion 5 of each jig 3 fits the outer periphery of the object 1. For example, in the present embodiment, since the object 1 to be turned is cylindrical, the front end portion 5 of the jig 3 is formed so as to form a substantially circle when the front end portions 5 of the three jigs 3 are combined. It is formed in an arc shape of about 120 °. Thus, by forming the shape of the front end 5 and the jig 3 so that the front end 5 of each jig 3 fits the outer periphery of the object 1, as shown in FIGS. An object 1 having various shapes such as an ellipse, a triangle, and a square, and an object 1 having various diameters such as a cylinder having a diameter of 1 mm and a cylinder having a diameter of 30 mm as shown in FIGS. While being able to hold | grip appropriately, it can arrange | position to the center of the position which processes the target object 1, and can perform a lathe process.

  Moreover, as shown in FIG. 3, the convex part 6 which protruded in the both sides is formed in the rear-end part of each jig | tool 3. As shown in FIG. And as shown to Fig.1 (a), the convex part 6 of each jig | tool 3 is fitted by each recessed part 4 of the substantially cyclic | annular fastening member 2. As shown in FIG. Furthermore, as shown in FIG. 6, the convex part 6 of each jig | tool 3 is fitted by the substantially cyclic | annular fastening member 2 using a ball plunger. Specifically, the ball plunger 23 is inserted from the outer periphery of the substantially annular fastening member 2 in the eight directions of the inner periphery, and the ball provided at the tip of the ball plunger 23 is one side of the convex portion 6 of the jig 3. It is urged by a spring and press-fitted into a hemispherical recess 24 provided in the. As described above, since the convex portion 6 of the jig 3 is fitted to the concave portion 4 provided on the inner periphery of the substantially annular fastening member 2 by using the ball plunger 23, the substantially annular fastening member 2 is provided. The fitting force between the jigs 3 and the jigs 3 can be further increased, and the jigs 3 can be reliably fitted, and the jigs 3 can be prevented from being detached from the substantially annular fastening member 2 during the lathe process.

  In addition, the jig 3 needs to form the front end part 5 so as to fit the outer periphery of the object 1 or to fit the convex part 6 at the rear end part to the concave part 4 of the substantially annular fastening member 2. For this reason, it is desirable to use a material that is softer and easier to process than the substantially annular fastening member 2. Further, in the present embodiment, the configuration in which the lathe machining target object 1 is gripped using the three jigs 3 is shown. However, the present invention is not limited to this. It is good also as a structure which hold | grips the target object 1 using the four jig | tools 3. FIG.

  FIG. 7 is a front view showing the collet chuck B. FIG. The jig 7 (a) has a disk shape, and the inner periphery is formed in a substantially trapezoidal cross section. Moreover, it has the notches 21 and 22 toward the outer periphery from the inner periphery of the jig | tool 7 (a), and especially the notch 22 has reached from the inner periphery to the outer periphery. As with the jig 3, the jig 7 (a) is preferably made of a material that is softer and easier to process than the substantially annular fastening member 2. An object having a trapezoidal cross-sectional outer shape (not shown) is fitted to the inner periphery of the jig 7 (a) to hold the object. In addition, as shown in FIG. 7, the jig 7 (a) is fitted to the inner periphery 8 of the substantially annular fastening member 2.

  FIGS. 8A to 8B are front views of various jigs 7 (a) to 7 (d) formed so as to be adapted to each outer shape of the object to be turned. In this way, by forming the inner periphery of the jig 7 so as to conform to each cross-sectional outline of the object to be turned, it is possible to appropriately grasp the object having various outer shapes and to process the object. Lathe processing can be performed by placing it at the center of the position.

  Other configurations and operations in the present embodiment are the same as those in the first embodiment.

  Fig.9 (a) is a right view which shows the contact part 10 and the bearing part 11 of the auxiliary tool 9, FIG.9 (b) is the same front view. FIG. 10 is a front view showing the shaft member 12 of the auxiliary tool 9. The auxiliary tool 9 includes an abutting portion 10, a bearing portion 11, and a shaft member 12, and the abutting portion 10 of the substantially annular fastening member 2 is concentrically contactable with the substantially annular fastening member 2. The bearing portion 11 is formed in a cylindrical shape on one side of the contact portion 10. The bearing portion 11 is formed in a disc shape having substantially the same diameter as the outer periphery. The contact portion 10 and the bearing portion 11 of the auxiliary tool 9 are joined and integrated, and a through hole 13 into which the shaft member 12 can be inserted is formed at the center from the contact portion 10 to the bearing portion 11 of the auxiliary tool 9. Is provided. The shaft member 12 is formed in a rod shape, and the outer diameter is divided into three parts, a large diameter part 12 (a), a medium diameter part 12 (b), and a small diameter part 12 (c).

  FIGS. 11A and 11B are conceptual views showing the collet chuck C in a state in which the auxiliary tool 9 is attached to the substantially annular fastening member 2. By screwing a screw (not shown) into the hole 14 of the auxiliary tool 9 and the hole 15 of the substantially annular fastening member 2, the contact portion 10 of the auxiliary tool 9 and the substantially annular fastening member 2 are concentrically arranged. Abutted. The shaft member 12 is inserted into the through-hole 13 and supports a lathe object 16 or 17 from the back. A screw (not shown) is screwed into the hole 18, and the screw is brought into contact with the side surface of the shaft member 12, so that the shaft member 12 is adjusted to the size of the object and placed at an appropriate position of the through hole 13. Fix it. As shown in FIGS. 10 (a) and 10 (b), the shaft member 12 can be used by being inserted into the through-hole 13 from either the front or rear direction according to the outer diameter of the object.

  By attaching the auxiliary tool 9 to the substantially annular fastening member 2 in this way, the auxiliary tool 9 serves as a stopper, and the lathe machining objects 16 and 17 can be appropriately arranged at the front and rear positions. In addition, it is possible to perform an appropriate lathe process on an appropriate portion of a short object or a long object.

  Other configurations and operations in the present embodiment are the same as those in the first and second embodiments. Further, in this embodiment, the screw (not shown) is screwed into the hole 18 and the shaft member 12 is fixed to an appropriate portion of the through hole 13. However, the shaft member 12 is fixed to the through hole 13. The configuration of fixing at an appropriate position is not limited to this, and for example, a screw may be cut on the outer periphery in the longitudinal direction of the shaft member 12 so that the shaft member 12 is screwed into the through hole 13.

(a) It is a front view which shows the state by which the target object of lathe processing is fitted by the collet chuck of Example 1 which concerns on this invention. (b) It is a right view which shows the state by which the target object of lathe processing is fitted by the collet chuck of Example 1 which concerns on this invention. It is a front view which shows the substantially cyclic | annular fastening member of Example 1 which concerns on this invention. It is a front view which shows the jig | tool of Example 1 which concerns on this invention. (A)-(2) is a front view which shows the jig | tool which hold | gripped the object of the lathe process of the various external shapes of Example 1 which concerns on this invention. (A)-(f) is a front view which shows the jig | tool which hold | gripped the target object of the lathe process of various diameters of Example 1 which concerns on this invention. It is a partial cross section figure which shows the state by which the jig | tool is fitted by the substantially cyclic | annular fastening member of the collet chuck which concerns on this invention. It is a front view which shows the collet chuck of Example 2 which concerns on this invention. (A)-(2) is a front view which shows the jig | tool of Example 2 which concerns on this invention. (a) is a right view which shows the contact part and bearing part of the auxiliary tool of Example 3 which concern on this invention. (b) is a front view which shows the contact part and bearing part of the auxiliary tool of Example 3 which concern on this invention. It is a front view which shows the shaft member of the auxiliary tool of Example 3 which concerns on this invention. (a) is a front view which shows the state by which the target object of lathe processing is fitted by the collet chuck using the auxiliary tool of Example 3 which concerns on this invention. (b) is a front view which shows the state by which the other target object of lathe processing is fitted by the collet chuck using the auxiliary tool of Example 3 which concerns on this invention.

A: Collet chuck, B: Collet chuck, C: Collet chuck, 1: Object, 2: A substantially annular fastening member, 3: Jig, 4: Concavity, 5: Front end, 6: Convex, 7: Osamu Tool: 8: Inner circumference, 9: Auxiliary tool, 10: Contact part, 11: Bearing part, 12: Shaft member, 12 (a): Large diameter part, 12 (b): Medium diameter part, 12 (c) : Small diameter part, 13: Through hole, 14: Hole, 15: Hole, 16: Object, 17: Object, 18: Hole, 19: Notch, 20: Notch, 21: Notch, 22: Notch, 23: Ball Plunger, 24: depression

Claims (4)

In a collet chuck that holds a lathe object,
The collet chuck is provided with a plurality of recesses on the inner periphery, and a substantially annular fastening member having a radial cut from the inner periphery to the outer periphery where the recesses are not provided,
The front end portion comprises a plurality of jigs that contact and grip the object,
The front end portion of each jig is formed to fit the outer periphery of the object, and the substantially annular fastening member is arranged such that the front end portion of each jig faces the central direction of the substantially annular fastening member. A collet chuck characterized in that a rear end portion of each jig is fitted in each of the recesses, and the objects to be lathe are gripped by the front end portions of the jig.   The collet chuck according to claim 1, wherein a convex portion is provided at a rear end portion of each jig, and the convex portions and the concave portions of the substantially annular fastening member are fitted. In a collet chuck that holds a lathe object,
The collet chuck includes a substantially annular fastening member having a radial cut from the inner periphery to the outer periphery,
It has a similar inner circumference slightly larger than the outer circumference of the object, and comprises a jig having a radial cut from the inner circumference to the outer circumference,
The collet chuck is characterized in that the jig is fitted to an inner circumference of the substantially annular fastening member, and the object is fitted to the inner circumference of the jig. An auxiliary tool joined to the substantially annular fastening member,
The auxiliary tool has a disc shape and has an outer periphery substantially the same as the outer periphery of the substantially annular fastening member, and an abutting portion that comes into contact with the substantially annular fastening member on a concentric circle;
A cylindrical bearing provided on one side of the contact portion;
A shaft member,
A through hole into which the shaft member can be inserted is provided in the center from the contact portion to the bearing portion, and the shaft member can be fixed at any position of the through hole. The collet chuck according to claim 1.

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