Tool holder

Abstract

The present invention provides a tool holder that can accurately hold the tool position point of a tool attached to a housed tool shank in a set position. [Solution] A tool holder 100 for housing a tool shank 200 having a handle portion 202 provided with a positioning groove 203, comprising a cylindrical body 10 and a positioning button 20. The cylindrical body has a fitting hole 12 and a side hole 14, and the positioning button is provided in the side hole, with one end of the button forming a contact portion 21a and protruding into the fitting hole. When the handle portion of the tool shank is inserted into the fitting hole, the contact portion of the positioning button is positioned in the positioning groove of the tool shank, so that the tool shank cannot rotate relative to the cylindrical body. As a result, the tool position point of the tool attached to the tool shank is held in the set position.

Description

Technical Field

[0001] The present invention relates to equipment related to a composite processing machine, and particularly to a tool holder for accommodating a tool shank.

Background Art

[0002] It is known that a processing machine controlled by a computer can perform processing operations such as drilling, milling, boring, turning, etc. by using different tools. Since different processing methods have different usage requirements for tools, dedicated tool shanks are used for various tools. For example, in the case of a tool used for turning, the tool shank used in combination with it needs to ensure that the tool does not slide during the process of heavy cutting and high-speed machining. That is, it is necessary to ensure the positioning accuracy of the tool position point (usually the tool tip) of the tool, and thus precise machining can be realized.

Summary of the Invention

Problems to be Solved by the Invention

[0003] As described above, the relative position after the tool and the tool shank are combined is related to whether the tool position point of the tool is held at an accurate set position. Therefore, usually, after one tool and one tool shank are combined, they are handled as one unit body. Also, each unit body is respectively accommodated in a corresponding tool holder in the tool magazine, so that it can be accurately taken out in the subsequent tool change operation. For this reason, accurately holding the tool position point of the tool in the unit body accommodated in each tool holder at a preset position is an issue that needs to be solved in the industry.

Means for Solving the Problems

[0004] In view of the above problems, an object of the present invention is to provide a tool holder that can accurately hold the tool position point of a tool attached to an accommodated tool shank at a set position.

[0005] To achieve the above objective, the tool holder according to the present invention is a tool holder for accommodating a tool shank having a handle portion provided with a positioning groove, and comprises a cylindrical body and a positioning button. The cylindrical body has a fitting hole and a side hole, the fitting hole is provided along a virtual axis, and the side hole penetrates the cylindrical body and communicates with the fitting hole. The positioning button is provided in the side hole and has a contact portion that protrudes into the fitting hole. [Effects of the Invention]

[0006] According to this invention, when the handle portion of the tool shank is inserted into the fitting hole, the contact portion of the positioning button engages with the positioning groove of the tool shank. As a result, the tool shank is unable to rotate relative to the cylindrical body about its axis. Therefore, the tool position point of the tool attached to the tool shank can be accurately held at a preset position. [Brief explanation of the drawing]

[0007] [Figure 1] A perspective view showing a tool holder and tool shank according to a preferred embodiment of the present invention. [Figure 2] Figure 1 is a perspective view showing the tool holder and tool shank separated. [Figure 3] Side view of Figure 1. [Figure 4] A cross-sectional view along line 4-4 in Figure 3. [Figure 5] A cross-sectional view along line 5-5 in Figure 3. [Modes for carrying out the invention]

[0008] To explain the present invention more clearly, preferred embodiments will be described in detail below with reference to the drawings. As shown in Figures 1 and 2, a tool holder 100 according to a preferred embodiment of the present invention is for inserting and housing a tool shank 200 used in a multi-tasking machine. The tool holder 100 is installed in a tool magazine (not shown). A flange portion 201 is formed in the central part of the tool shank 200, and the tool is divided into a front portion and a rear portion by the flange portion 201. A tool (not shown) is attached to the front portion of the tool shank 200. The rear portion of the tool shank 200 constitutes a handle portion 202. The handle portion 202 has an end face 202a and an outer peripheral surface 202b. In this embodiment, the tool shank 200 is described as one that is applied to heavy cutting and high-speed machining. For this reason, the outer peripheral surface 202b is designed as a non-circular outer peripheral surface formed by connecting three arcuate surfaces. Furthermore, the tool shank 200 has a positioning groove 203 recessed at a position where one of the arcuate surfaces of the outer circumferential surface 202b connects to the end surface 202a.

[0009] Referring to Figure 2, and further to Figures 3 to 5, the tool holder 100 of this embodiment comprises a cylindrical body 10, a positioning button 20, and a pressing member 30. The cylindrical body 10 is formed by injection molding of molten aluminum and has the advantages of being lightweight and resistant to deformation.

[0010] The cylindrical body 10 is provided with a fitting hole 12 along a virtual axis L, and a tool fixing assembly 40 is installed inside the fitting hole 12. The initial outer shape of the cylindrical body 10 is circular, and the hole wall of the fitting hole 12 corresponds to the outer contour of the handle portion 202 of the tool shank 200. Specifically, three arcuate surfaces are connected to form a non-circular hole that is roughly triangular in shape. As a result, the thickness of the cylindrical wall of the cylindrical body 10 forms a narrow section T1 at the connection point between adjacent arcuate surfaces, and a thick section T2 between the two narrow sections T1, as shown in Figure 5. Furthermore, the cylindrical body 10 is provided with a side hole 14 and a screw hole 16. The side hole 14 penetrates one of the thick sections T2 of the cylindrical body 10 and communicates with the fitting hole 12. In addition, another thick section T2 of the cylindrical body 10 is provided with a spare side hole 14' and a spare screw hole (not shown).

[0011] The positioning button 20 is installed in the side hole 14. The pressing member 30 in this embodiment is a bolt and is screwed into the threaded hole 16. The pressing member 30 holds the positioning button 20 in the side hole 14 so that the positioning button 20 does not detach from the cylindrical body 10. In a specific application example, the side hole 14 is a stepped hole having a large diameter hole 14a and a small diameter hole 14b. The positioning button 20 comprises a rod portion 21 and a head portion 22, the rod portion 21 passing through the small diameter hole 14b and one end thereof connected to the head portion 22. The head portion 22 abuts against the large diameter hole 14a. The other end of the rod portion 21 protrudes into the fitting hole 12 and constitutes a contact portion 21a. After the pressing member 30 is fastened to the cylindrical body 10, a part of it abuts against the outside of the head portion 22, thereby restricting the position of the positioning button 20.

[0012] The method for holding the positioning button 20 in a predetermined position is not limited to the structure described above. For example, the side hole 14 can be formed as a screw hole, the rod portion 21 of the positioning button 20 can be formed as a threaded rod portion, and one end thereof can be configured as the contact portion. The purpose of holding the positioning button 20 in a predetermined position can be achieved by screwing the screw hole and the threaded rod portion together. In this case, the pressing member 30 can be omitted.

[0013] The above describes the structure of a tool holder 100 according to a preferred embodiment of the present invention. When the handle portion 202 of the tool shank 200 is inserted into the fitting hole 12 of the cylindrical body 10 in a predetermined and correct position, the positioning groove 203 provided in the handle portion 202 corresponds to the contact portion 21a of the positioning button 20, thereby smoothly pushing the tool shank 200 into the cylindrical body 10. When the flange portion 201 of the tool shank 200 is inserted until it contacts the front edge of the cylindrical body 10, the contact portion 21a of the positioning button 20 is located within the positioning groove 203 of the tool shank 200. As a result, the tool shank 200 cannot rotate relative to the cylindrical body 10 about the axis L. At the same time, the tool shank 200 is securely fixed to the cylindrical body 10 by the tool fixing assembly 40.

[0014] As described above, the tool shank 200 can be smoothly pushed into the cylindrical body 10 only when the positioning groove 203 of the handle portion 202 corresponds to the contact portion 21a of the positioning button 20. Conversely, if the handle portion 202 of the tool shank 200 is inserted into the fitting hole 12 of the cylindrical body 10 in the wrong position for any reason, the end face 202a of the handle portion 202 will come into contact with the contact portion 21a of the positioning button 20, thereby preventing the handle portion 202 of the tool shank 200 from being fully inserted into the fitting hole 12. Thus, the structural design of the present invention prevents the tool shank 200 from being inserted into the tool holder 100 in the wrong position, thereby preventing the problem of the tool position point of the tool attached to the tool shank 200 not being held in the correct setting position.

[0015] In this embodiment, the cylindrical body 10 is pre-equipped with the pre-prepared side hole 14' and the pre-prepared screw hole. These are designed to accommodate different types of tool shanks with positioning grooves at different locations, thereby increasing the variety of tool shanks to which the tool holder 100 can be applied.

[0016] Preferred embodiments of the present invention have been described above, but the present invention is not limited thereto. Any equivalent changes and modifications made based on the specification and the scope of the utility model registration of the present invention shall all be included in the scope of the utility model registration claims of the present invention. [Explanation of Symbols]

[0017] 100: Tool holder 10: Cylindrical body 12: Fitting hole 14: Side hole 14a: Large diameter hole 14b: Small diameter hole 14': Reserve side hole 16: Screw hole 20: Positioning button 21: Rod 21a: Contact part 22: Head 30: Pressing member 40: Tool fixing assembly 200: Tool shank 201: Flange part 202: Shank 202a: End face 202b: Outer peripheral surface 203: Positioning groove L: Axis T1: Narrow part T2: Thick part

Claims

1. A tool holder for housing a tool shank having a handle portion provided with a positioning groove, A cylindrical body comprising a fitting hole provided along a virtual axis, and a side hole that penetrates the cylindrical body and communicates with the fitting hole, A positioning button provided within the side hole and having a contact portion that protrudes into the fitting hole, Equipped with, A tool holder configured such that when the handle portion of the tool shank is inserted into the fitting hole, the contact portion of the positioning button is positioned within the positioning groove of the tool shank, thereby preventing the tool shank from rotating relative to the cylindrical body about its axis.

2. The tool holder according to claim 1, further comprising a pressing member fixed to the cylindrical body, which restricts the position of the positioning button so that the positioning button does not detach from the cylindrical body.

3. The side holes of the cylindrical body are stepped holes having a large diameter hole and a small diameter hole. The positioning button comprises a rod and a head, The rod portion is inserted into the small-diameter hole, and one end of the rod portion constitutes the contact portion. The head portion abuts against the large diameter hole, The tool holder according to claim 2, wherein a part of the pressing member is configured to abut against the outside of the head.

4. The side hole of the cylindrical body is a screw hole. The positioning button is equipped with a threaded rod, The tool holder according to claim 1, wherein the threaded rod portion is screwed into the threaded hole, and one end thereof constitutes the contact portion.

5. The hole wall of the fitting hole in the cylindrical body is a non-circular hole formed by the connection of three arcuate surfaces. The thickness of the cylindrical body's wall is such that a narrow section is formed at the connection point between adjacent arcuate surfaces, and a thick section is formed between the two narrow sections. The tool holder according to any one of claims 1 to 4, wherein the side hole is configured to penetrate one of the thick portions of the cylindrical body.

6. The tool shank is provided with a flange portion. The handle portion is connected to the flange portion and has an outer circumferential surface formed by connecting the end face and three arcuate surfaces. The positioning groove is formed at the connection point between the end face and one of the three arcuate surfaces. The tool holder according to claim 5, wherein when the handle portion of the tool shank is inserted into the fitting hole and the flange portion abuts against the cylindrical body, the contact portion of the positioning button is positioned within the positioning groove of the tool shank.

7. The tool holder according to claim 1, wherein the cylindrical body is formed by injection molding of molten aluminum.

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