JP3108254U - Collet with elasticity - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a collet having elasticity that allows a relatively long cutting tool to receive a long force and can hold the cutting tool stably and firmly.
SOLUTION: Both end portions of a main body 10 are a top surface 11 and a bottom surface 12 in a state of being flattened, and a shaft hole 13 is installed through the center of the main body 10. The main body 10 has four first dead grooves 17 and four second dead grooves 18. Between the bottom edge 171 and the shaft hole 13 of each first dead groove 17, there is a bottom surface from the top surface 11. A first opening 172 that is cut over 12 and does not penetrate the bottom surface 12 is provided. Between the bottom edge of the second grooving groove and the shaft hole 13, there is provided a second cut that extends from the bottom surface 12 to the top surface 11 and does not penetrate the top surface 11. The cuts do not penetrate the top surface 11 and the bottom surface 12 at the same time, and the main body 10 has elasticity. By inserting the blade handle of the blade from the bottom surface 12 into the shaft hole 13, the main body 10 holds the blade stably and firmly.
[Selection] Figure 5

Description

  The present invention relates to an elastic collet used for holding a small-sized blade.

  Generally, a collet having elasticity has many kinds of standards for the diameter of the shaft hole into which the upper half of the cutting tool is inserted. However, for a cutting tool having a relatively small size, for example, if a 0.9 mm cutting tool is used, processing of a 0.9 mm hole diameter is not easy. So make it. As shown in FIG. 1, first, the hole diameter d1 of the front portion larger than 0.9 mm is processed, and then the hole diameter d2 of the rear portion equal to or smaller than 0.9 mm is processed.

  However, processing is not easy because of the limitation that the hole diameter of 0.9 mm is very small, and there is a limit to the length that can be manufactured for the hole diameter d2 of the rear portion of 0.9 mm. In other words, the length (that is, the portion where the blade A is held) having a force of 0.9 mm of the blade A is limited, and therefore the axis of the other end where the blade A is not held (ie the machining end). Generates a biased state. When the blade rotates at high speed, the accuracy of the workpiece is affected, and the blade A can be easily torn due to the centrifugal force.

  Speaking of an elastic collet used to hold a cutting tool of a small size, it is not easy to process due to the limitation of the small hole diameter, and it indirectly affects the length received by the force of the cutting tool. In the end, there is definitely a precision processing problem to be created, which allows the creator of this proposal to go through detailed thought and to gain experience in researching and developing in related industries for many years. It was.

  Accordingly, an object of the present invention is to provide a collet having elasticity that allows a relatively long cutting tool to receive a long force, and that can hold the cutting tool stably and firmly.

  In order to achieve the above object, the elastic collet according to the claims of the present invention has a main body having a top surface and a bottom surface, and a shaft hole extends through the main body. In addition, both ends of the shaft hole are connected to the top surface and the bottom surface, respectively, and a predetermined number of dead grooves are connected to the shaft hole. The axial hole diameter is equal to or smaller than 0.9 mm.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 2 is a side view showing an elastic collet according to an embodiment of the present invention.
FIG. 3 is a top view showing an elastic collet according to an embodiment of the present invention.
FIG. 4 is a bottom view showing an elastic collet according to an embodiment of the present invention.
FIG. 5 is a 5-5 autopsy view of FIG. 4 and shows the relative positions of the first autopsy groove and the first mouth.
6 is a 6-6 autopsy view of FIG. 4 and shows the relative positions of the second autopsy groove and the second cut.

    As shown in FIGS. 2 to 6, the elastic collet 1 according to the embodiment of the present invention has a main body 10. Both end portions of the main body 10 become a top surface 11 and a bottom surface 12 in a flat state, and the shaft hole 13 is installed through the center of the main body 10. The shaft hole 13 penetrates the top surface 11 and the bottom surface 12 of the main body 10, and the diameter of the shaft hole 13 is smaller than or equal to 0.9 mm. In the present embodiment, the diameter of the shaft hole 13 is described as an example of 0.9 mm. A hole diameter of 0.9 mm can be manufactured by an electric discharge machining method. A portion of the top surface 11 is a conical covering portion 14 and is placed in a shaft hole (not shown in the drawing) of the arbor of the machine tool. Below the covering portion 14 is a neck shaft 15 with a narrowed neck, and below the neck shaft 15 is a pinching portion 16, and the handle (not shown in the figure) of the working tool is axially opened from the bottom surface 12. 13 can be placed on the bottom.

  As shown in FIG. 4, the main body 10 also has four first dead grooves 17 and four second dead grooves 18. As shown in FIG. 5, between the bottom edge 171 of each first autopsy groove 17 and the shaft hole 13, there is a first opening 172 that is cut from the top surface 11 to the bottom surface 12 and does not penetrate the bottom surface 12. Is provided. As shown in FIG. 6, between the bottom edge 181 and the shaft hole 13 of each second dead groove 18, there is a second cut 182 that is cut from the bottom surface 12 to the top surface 11 and does not penetrate the top surface 11. Is provided. That is, each of the first opening 172 and the second cutting edge 182 does not penetrate the top surface 11 and the bottom surface 12 at the same time, and the main body 10 has elasticity and can exert a pinching force. By inserting the blade handle of the cutting tool into the shaft hole 13 from the bottom surface 12, the main body 10 can stably hold the cutting tool firmly.

  The advantage of this embodiment is that the shaft hole 13 has a single small hole diameter and penetrates the main body 10 to increase the contact between the blades. That is, the length of the force received by the blade can be increased, and when the blade handle of the blade is inserted into the shaft hole 13, the blade portion of the blade can be completely held. This increases the pinching force and is effective in reducing the occurrence of the problem that the blade is idle. Compared with the shaft hole of the conventional collet with elasticity, it is easy to process and manufacture, and it is a two-stage structure consisting of connected small and large hole diameters, and by sandwiching the cutting tool with a slightly small hole diameter part, The structure of the collet having the above-described elasticity can easily avoid a state of idling due to a shortage of holding force.

  In summary, the embodiments of the present invention have a very practical utility and are convenient to use among similar products. In addition, the embodiment of the present invention has never been seen or publicly used in the publication of the same article before the application, so the present invention already has the requirements of the new patent and is subject to the law. Submit the application.

  However, the above-described embodiment is only a comparatively excellent embodiment of the present invention. Therefore, the structural changes similar to those in the description and the scope of patent application to which the present invention is applied are naturally in the present invention. Included in the claims.

It is a figure which shows the cutting tool provided with the collet of the conventional small hole diameter. 1 is a side view showing a collet having elasticity according to an embodiment of the present invention. 1 is a top view showing a collet having elasticity according to an embodiment of the present invention. 1 is a bottom view showing a collet having elasticity according to an embodiment of the present invention. FIG. 5 is a 5-5 autopsy view of FIG. 4 showing the relative positions of the first autopsy groove and the first mouth. FIG. 6 is a 6-6 autopsy view of FIG. 4 showing the relative positions of the second autopsy groove and the second cut.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Collet which has elasticity, 10 main body, 11 top face, 12 bottom face, 13 axial hole, 14 covering part, 15 neck axis, 16 pinching part, 17 1st dead groove, 18 second dead groove, 171 first dead line Bottom edge of the groove, 172 No.1 mouth, 181 Bottom edge of the second autopsy groove, 182 Second cut

Claims (6)

A collet having elasticity,
The main body has a top surface and a bottom surface, the shaft hole penetrates the main body, both ends of the shaft hole are connected to the top surface and the bottom surface, and a predetermined number of dead grooves are connected to the shaft hole. A collet having elasticity characterized by being 9 mm.   There are a predetermined number of first grooving grooves and a predetermined number of second grooving grooves, each having a first mouth between the bottom edge of each first grooving groove and the shaft hole. 2. The collet having elasticity according to claim 1, wherein the second cut is provided between the edge and the shaft hole.   3. An elastic collet according to claim 2, wherein the width of the cut is smaller than the diameter of the shaft hole. A collet having elasticity,
The main body has a top surface and a bottom surface, the shaft hole penetrates the main body, both ends of the shaft hole are connected to the top surface and the bottom surface, a predetermined number of grooving grooves are connected to the shaft hole, and the diameter of the shaft hole is 0. An elastic collet characterized by being smaller than 9 mm.   It has a predetermined number of first grooving grooves and a predetermined number of second grooving grooves, and has one first mouth between each first grooving groove bottom edge and shaft hole, and each second grooving groove bottom 5. The collet having elasticity according to claim 4, wherein the second cut is provided between the edge and the shaft hole.   The elastic collet according to claim 5, wherein the width of the cut is smaller than the diameter of the shaft hole.

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