Water-cooled tool holder with vibration damping function

Abstract

This invention provides a water-cooled tool holder with vibration damping functionality that suppresses vibrations generated during machining, thereby improving machining quality and reducing noise. [Solution] The water-cooled tool holder with vibration damping function comprises a holder body 10, a water supply assembly, a collet 30, a tool contact member 40, a vibration damping assembly 50, and a collar 60 fitted onto the holder body, all located inside the holder body. The holder body has an adjustment screw hole inside, and the tool contact member has a screw portion that screws into the adjustment screw hole, a contact head provided at one end of the screw portion, a communication passage provided inside the tool contact member, and a vibration damping housing chamber provided inside the tool contact member and extending from the contact head to the communication passage. The vibration damping assembly is provided with a vibration damping spring and a vibration damping block located inside the vibration damping housing chamber, the vibration damping spring contacts the tool contact member and the vibration damping block, the vibration damping block is made of tungsten alloy and has a water supply through-hole that communicates with the communication passage.

Description

Technical Field

[0001] The present invention relates to a holder for machining, and particularly to a water-cooled tool holder with a vibration damping function that can suppress vibrations generated during machining.

Background Art

[0002] During the cutting of a workpiece, the tool holder receives a large reaction force, so vibrations are likely to occur during machining. When machining a workpiece with a tool holder, the generation of vibrations is inevitable. In particular, in the case of a long tool holder used for machining large workpieces, the vibrations generated during machining not only reduce the machining efficiency but also cause the machining surface of the workpiece to become rough, leaving significant machining marks, and further cause problems such as generating noise.

[0003] Conventional water-cooled tool holders mainly include a holder body, a water supply assembly, and a tool contact member. The tool for cutting the workpiece is mounted at one end of the holder body. The water supply assembly is provided on the other end side close to the holder body inside the holder body, and the tool contact member is provided inside the holder body and can contact the tool.

[0004] Conventional water-cooled tool holders do not have a configuration for suppressing vibrations. Therefore, there is a problem that the vibrations of the tool holder have a significant adverse effect on the machining quality during the machining of large workpieces or workpieces made of specific materials with high hardness.

Summary of the Invention

[0005] In order to solve the problems such as the reduction of machining efficiency and machining quality and the generation of noise caused by the lack of vibration damping design in conventional water-cooled tool holders, the present invention proposes a water-cooled tool holder with a vibration damping function, thereby suppressing the vibrations of the tool holder generated during machining and aiming to improve the machining quality and reduce noise.

[0006] To achieve the above objective, the technical means employed in this invention is a water-cooled tool holder with vibration damping function, A holder body comprising a first housing chamber and a second housing chamber provided inside and extending to both ends of the holder body, and an adjustment screw hole provided inside and connecting the first housing chamber and the second housing chamber, A water supply assembly is provided in the second storage chamber and connected to the holder body, having a water inlet passage that communicates with the second storage chamber, and a water supply pipe that connects to the holder body. A collet provided in the first storage chamber and having a tool mounting hole communicating with the first storage chamber, A collar fitted onto the holder body, A tool contact member provided in the first housing chamber, comprising: a threaded portion that is screwed into the adjustment screw hole; a contact head provided at one end of the threaded portion and located within the first housing chamber; a connecting passage provided inside and communicating with the water inlet passage; and a vibration-damping housing chamber provided inside and extending from the contact head to the connecting passage, A vibration damping assembly comprising a vibration damping spring and a vibration damping block located in the vibration damping housing chamber, wherein one end of the vibration damping spring abuts against the tool contact member, and the vibration damping block is manufactured from a tungsten alloy, abuts against the other end of the vibration damping spring, and has a water supply through-hole communicating with the communication passage, is a water-cooled tool holder with a vibration damping function.

[0007] The enhanced effects obtained by the technical means of this invention are as follows: In other words, the water-cooled tool holder with vibration damping function of this invention is equipped with a vibration damping assembly inside the tool contact member, and the vibration damping block of the vibration damping assembly is made of high-density tungsten alloy and has a higher specific gravity than the holder body, and this vibration damping block works in cooperation with the vibration damping spring to suppress vibrations generated during processing, thereby improving processing quality and reducing noise. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic perspective view of a preferred embodiment of the present invention. [Figure 2] This is a schematic perspective view of a preferred embodiment of the present invention. [Figure 3] This is a schematic perspective view of a preferred embodiment of the present invention, showing a tool contact member and a vibration damping assembly. [Figure 4] This is an exploded schematic diagram of a preferred embodiment of the present invention, showing the tool contact member and the vibration damping assembly. [Figure 5] This is a schematic cross-sectional view of a preferred embodiment of the present invention. [Figure 6] This is a schematic cross-sectional view showing the usage state of a preferred embodiment of the present invention. [Modes for carrying out the invention]

[0009] As shown in Figures 1 and 2, the water-cooled tool holder with vibration damping function of the present invention includes a holder body 10, a water supply assembly 20, a collet 30, a tool contact member 40, a vibration damping assembly 50, and a collar 60.

[0010] As shown in Figures 1, 2, and 5, the holder body 10 includes two opposing ends, a first storage chamber 11, a second storage chamber 12, an adjustment screw hole 13, and a coupling screw hole 14. Each of the first storage chamber 11 and the second storage chamber 12 is located inside the holder body 10 and extends from there to both ends of the holder body 10. The adjustment screw hole 13 is located at an intermediate position inside the holder body 10 and communicates with the first storage chamber 11. The coupling screw hole 14 is located at an intermediate position inside the holder body 10 and connects the adjustment screw hole 13 and the second storage chamber 12. The first storage chamber 11 and the second storage chamber 12 are connected via the adjustment screw hole 13 and the coupling screw hole 14, which communicate with the first storage chamber 11.

[0011] As shown in Figures 1, 2, and 5, the water supply assembly 20 is provided in the second storage chamber 12 and coupled to the holder body 10. The water supply assembly 20 has a coupling screw sleeve 21 and a water supply pipe 22. The coupling screw sleeve 21 has an external thread and is screwed into the coupling screw hole 14 of the holder body 10, while the water supply pipe 22 is inserted through the coupling screw sleeve 21 and has an inlet passage 221 that communicates with the second storage chamber 12.

[0012] As shown in Figures 1, 2, and 5, the collet 30 is provided in the first housing chamber 11 and has a tool mounting hole 31 that communicates with the first housing chamber 11. The tool 70 can be inserted into the tool mounting hole 31 of the collet 30, and a water outlet hole is formed inside the tool 70. In a preferred embodiment of the present invention, the tool 70 is engaged with the collet 30 in the radial direction by an engaging member, but since the engagement by the engaging member is prior art, its explanation will be omitted.

[0013] As shown in Figures 3 to 5, the tool contact member 40 is provided inside the holder body 10 and has a threaded portion 41, an insertion step 42, a contact head 43, a connecting passage 44, a vibration damping housing chamber 45, and an engagement hole 46. The threaded portion 41 is provided at an intermediate position of the tool contact member 40 and has external threads at both opposing ends, and the threaded portion 41 is screwed into the adjustment screw hole 13 of the holder body 10. The insertion step 42 is provided at one end of the threaded portion 41 and is inserted into the water inlet passage 221 of the water supply pipe 22, and its outer diameter is smaller than the outer diameter of the threaded portion 41. The contact head 43 is provided at the other end of the threaded portion 41 at a position opposite to the insertion step 42, and contacts the tool 70, and its outer diameter is larger than the outer diameter of the threaded portion 41.

[0014] As shown in Figures 3 to 5, the connecting passage 44, the vibration-damping housing chamber 45, and the engagement hole 46 are provided inside the tool contact member 40. The connecting passage 44 extends from the threaded portion 41 toward both ends of the tool contact member 40. The vibration-damping housing chamber 45 extends from the contact head portion 43 toward the connecting passage 44 and communicates with the connecting passage 44. The engagement hole 46 has a polygonal contour and extends from the insertion step 42 toward the connecting passage 44 and similarly communicates with the connecting passage 44. In a preferred embodiment of the present invention, the contour of the engagement hole 46 has a hexagonal shape corresponding to the cross-section of a hex wrench.

[0015] As shown in Figures 3 to 5, the vibration damping assembly 50 is provided in the vibration damping chamber 45 of the tool contact member 40 and includes a vibration damping spring 51 and a vibration damping block 52. The vibration damping spring 51 is a compression spring with opposing ends, one end of which is in contact with the tool contact member 40. The vibration damping block 52 is a cylindrical body made of tungsten alloy and has opposing ends and water supply through-holes 521 extending to those ends. The water supply through-holes 521 communicate with the communication passage 44 via the vibration damping chamber 45. The water outlet hole of the tool 70 inserted into the tool mounting hole 31 of the collet 30 also communicates with the water supply through-holes 521.

[0016] As shown in Figures 3 to 5, in a preferred embodiment of the present invention, a retaining ring groove 47 is provided on the contact head 43 of the tool contact member 40, and by installing a retaining ring 53 in the retaining ring groove 47, the vibration damping spring 51 and vibration damping block 52 of the vibration damping assembly 50 are restricted to the inside of the vibration damping housing chamber 45 of the tool contact member 40.

[0017] As shown in Figures 1, 2, and 5, the collar 60 is fitted onto the holder body 10 and surrounds the collet 30 of the first housing chamber 11. In a preferred embodiment of the present invention, a bearing is further provided between the collar 60 and the holder body 10, but since this bearing is prior art, its description is omitted.

[0018] As shown in FIGS. 1, 2 and 5, when the cooling liquid is supplied from the water inlet passage 221 of the water supply pipe 22 of the water supply assembly 20, it sequentially flows through the engagement hole 46 and the communication passage 44 of the tool contact member 40 and into the water supply through hole 521 of the vibration damping block 52. Then, the cooling liquid flows from the water supply through hole 521 into the water outlet hole of the tool 70 and is ejected from the tool 70 to cool and lubricate the tool 70 and the workpiece.

[0019] As shown in FIGS. 3 to 5, in order to prevent leakage when the cooling liquid flows from the water supply through hole 521 into the water outlet hole of the tool 70, in the present invention, a seal groove 48 is provided at the end of the contact head 43 of the tool contact member 40, and a seal ring 54 is mounted in the seal groove 48. The seal ring 54 surrounds the water supply through hole 521 of the vibration damping block 52, thereby preventing leakage of the cooling liquid.

[0020] As shown in FIG. 5, in the water supply and cooling type tool holder with a vibration damping function of the present invention, the vibration damping block 52 of the vibration damping assembly 50 is made of a high-density tungsten alloy and has a specific gravity greater than that of the holder body 10. Therefore, the vibration damping block 52 of the vibration damping assembly 50 cooperates with the vibration damping spring 51 to suppress the vibration generated during the processing of the present invention, improving the processing quality and reducing the noise. In addition, the vibration damping block 52 in the preferred embodiment of the present invention is made of a high-density tungsten alloy, but it may also be made of other high-density materials.

[0021] As shown in FIG. 6, when it is desired to adjust the position of the tool 70 in the first accommodation chamber 11 of the holder body 10, first, an operator inserts a hexagon wrench 80 into the second accommodation chamber 12 of the holder body 10, inserts it into the water inlet passage 221 of the water supply pipe 22, and inserts it into the engagement hole 46 of the tool contact member 40. At this time, since the hexagon wrench 80 having a hexagonal cross-section engages with the engagement hole 46 having a hexagonal contour, when the operator rotates the hexagon wrench 80, the tool contact member 40 rotates in conjunction and moves along the adjustment screw hole 13 of the holder body 10, and the tool 70 can be pushed out to a preferable position by the tool contact member 40.

Explanation of Signs

[0022] 10 Holder body 11 First accommodation chamber 12 Second accommodation chamber 13 Adjustment screw hole 14 Coupling screw hole 20 Water supply assembly 21 Coupling screw sleeve 22 Water supply pipe 221 Water inlet passage [[ID= Twenty-five ]]30 Collet 31 Tool mounting hole 40 Tool contact member 41 Screw portion 42 Insertion step 43 Contact head 44 Communication passage 45 Vibration damping accommodation chamber 46 Engagement hole 47 Retaining ring groove 48 Seal groove 50 Vibration damping assembly 51 Vibration damping spring 52 Vibration damping block 521 Water supply through hole 53 Retaining ring 54 Seal ring 60 Collar 70 Tool 80 Hexagon wrench

Claims

1. A water-cooled tool holder with vibration damping function, A holder body comprising a first housing chamber and a second housing chamber provided inside, each extending to both ends of the holder body, and an adjustment screw hole provided inside, connecting the first housing chamber and the second housing chamber, A water supply assembly is provided in the second storage chamber and connected to the holder body, having a water inlet passage that communicates with the second storage chamber, and a water supply pipe that connects to the holder body. A collet provided in the first storage chamber and having a tool mounting hole communicating with the first storage chamber, A collar fitted onto the holder body, A tool contact member provided in the first housing chamber, comprising: a threaded portion that is screwed into the adjustment screw hole; a contact head provided at one end of the threaded portion and located within the first housing chamber; a communication passage provided inside and communicating with the water inlet passage; and a vibration-damping housing chamber provided inside and extending from the contact head to the communication passage, A vibration damping assembly comprising a vibration damping spring and a vibration damping block located within the vibration damping housing chamber, wherein one end of the vibration damping spring abuts against the tool contact member, and the vibration damping block is manufactured from a tungsten alloy, abuts against the other end of the vibration damping spring, and has a water supply through-hole communicating with the communication passage, A water-cooled tool holder with vibration damping function, characterized by the above features.

2. The water-cooled tool holder with vibration damping function according to claim 1, characterized in that the tool contact member is provided at one end of the threaded portion and includes an insertion step opposite to the position of the contact head, and the insertion step is inserted into the water inlet passage so as to connect the communication passage and the water inlet passage.

3. The water-cooled tool holder with vibration damping function according to claim 2, characterized in that an engagement hole having a polygonal contour is provided inside the tool contact member, extending from the insertion step to the communication passage and communicating with the communication passage.

4. The water-cooled tool holder with vibration damping function according to claim 3, characterized in that a retaining ring groove is formed on the contact head of the tool contact member, for which a retaining ring is provided to restrict the vibration damping spring and the vibration damping block to the vibration damping housing chamber.

5. The water-cooled tool holder with vibration damping function according to claim 4, characterized in that a seal groove is formed at the end of the contact head, and a seal ring surrounding the water supply through-hole is provided therein.

6. A water-cooled tool holder with vibration damping function according to any one of claims 2 to 5, characterized in that the outer diameter of the contact head is larger than the outer diameter of the threaded portion.

7. The water-cooled tool holder with vibration damping function according to claim 6, characterized in that the outer diameter of the insertion step is smaller than the outer diameter of the threaded portion.

8. The holder body is provided at an intermediate position inside the holder body and has a connecting screw hole that connects the adjustment screw hole and the second housing chamber. The water supply assembly is characterized by comprising a coupling screw sleeve that is screwed into the coupling screw hole and through which the water supply pipe is inserted, as described in claim 7, for a water supply cooling tool holder with vibration damping function.

9. The holder body is provided at an intermediate position inside the holder body and has a connecting screw hole that connects the adjustment screw hole and the second housing chamber. The water supply assembly is characterized by comprising a coupling screw sleeve that is screwed into the coupling screw hole and through which the water supply pipe is inserted, as described in claim 1, for a water supply cooling tool holder with vibration damping function.

10. The water-cooled tool holder with vibration damping function according to claim 1, characterized in that the outer diameter of the contact head is larger than the outer diameter of the threaded portion.

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