JP3187194U - Tool holder - Google Patents

Abstract

An object of the present invention is to provide a cutting tool capable of giving an excellent cooling effect and lubricating effect to a cutting member, suppressing vibration due to contact between the cutting member and a workpiece, and further capable of firmly fixing the cutting member. A tool holder is provided.
A first enclosing wall 113 includes a plurality of recesses in a circumferential direction that is a direction along a central axis from an inner peripheral surface on the first chamber 111 side so as to communicate with the first chamber 111. Circumferential grooves 13, 13,... Are formed, and the insertion end 62 of the fixing bolt 6 is obliquely inward from the end surface 621 and radially inward from the outer peripheral surface over the entire circumference so as to communicate with the second chamber 112. A lateral groove 63 having a triangular cross section is formed. A resilient first O-ring 5 and second O-ring 7 are attached to the circumferential groove 13 and the lateral groove 63.
[Selection] Figure 2

Description

  The present invention relates to a tool holder for a cutting tool, and more particularly to a tool holder capable of achieving a cooling function and a vibration preventing function.

  2. Description of the Related Art Conventionally, as a cutting device that cuts, for example, metal or the like, the tool holder includes a cutting member used to perform cutting, drilling, grinding, and the like on a processing target, and a tool holder that holds the cutting member. In addition, there is known one in which two holes are formed from the distal end portion and the outer peripheral surface to the proximal end side (see, for example, Patent Document 1). 6 to 8 show a conventional tool holder 8 for a cutting tool. In order to supply a cooling lubricant to the cutting member 80, the tool holder 8 is connected to a lubricant supply means (not shown), and has a holder body formed in a sleeve shape. A central hole 81 is provided from approximately the center to the base end of the front end of the main body, and a communication hole 82 is provided from the outer peripheral surface to the base end. The central hole 81 has a first chamber 811 for mounting and holding the cutting member 80 and a second chamber 812 having a diameter larger than that of the first chamber 811. A plurality of fixing holes 813 and 814 that spatially communicate with the first chamber 811 are formed in the holder body on the outer peripheral surface and the front end surface. The communication hole 82 accommodates a cooling lubricant and communicates with a lubricant supply means (not shown) as a passage for ejecting the lubricant. The communication hole 82 is provided in parallel with the central hole 81 and is formed on the front end surface of the holder body. A spout 821 is formed. The jet outlet 821 is formed to be recessed from the tip surface. By screwing into the fixing holes 813 and 814 with screws 83 and 86, the shaft portion of the cutting member 80 is positioned in the holder body. A nozzle member 84 formed so as to be rotatable is mounted in a recess in which a spout 821 is formed on the tip surface of the holder body. The nozzle member 84 has an ejection passage 840 formed as a lubricant passage communicating with the communication hole 82. A fixing bolt 85 that abuts against the cutting member 80 from the base end side of the holder main body and fixes the cutting member 80 is inserted into the second chamber 812 from the base end and connected thereto. When the nozzle member 84 is orientated by mounting the screw 86 in the fixing hole 814, lubrication is ejected from the nozzle member 84 toward the contact area formed between the cutting member 80 and the workpiece 87 to be cut. A predetermined angle can be obtained with respect to the central axis X of the holder body so as to eject the agent. When the cutting process of the workpiece 87 is completed, the ejection passage 840 is closed by the nozzle plug 88 (see FIG. 7).

Taiwan registered utility model No. 251483 specification

  As shown in FIG. 8, when the cutting member 80 comes into contact with the work 87 during the cutting of the work 87, it vibrates. For this reason, the cutting edge of the cutting member 80 is worn, which adversely affects the cutting accuracy and causes noise.

  The present invention has been made by solving the above-described problems, and can provide an excellent cooling effect and lubrication effect to the cutting member, and can suppress vibration due to contact between the cutting member and the workpiece. Is intended to provide a tool holder for a cutting tool capable of firmly fixing a cutting member.

  In order to achieve the above object, the present invention is for holding a cutting member for machining a workpiece to be machined, and has a hollow sleeve shape along an axial direction which is a direction along its own central axis. A holder main body formed, the holder main body having a distal end portion that is the upper side in the axial direction and a proximal end portion that is the lower side in the axial direction, and extending from the distal end portion to the proximal end portion side. A central hole defined to surround the central axis of the holder main body, and a communication hole disposed parallel to the central hole and disposed from the outer peripheral surface of the holder main body toward the tip end side, are formed. Defines a first chamber having a first chamber for mounting and holding the cutting member on the tip side, and a second chamber extended from the first chamber. 1 enclosing wall and the second wall And a second surrounding wall defining a chamber, and the first surrounding wall has a central axis from an inner peripheral surface on the first chamber side so as to communicate with the first chamber. A plurality of circumferential grooves are formed in a circumferential direction that is a direction along the circumference, and a plurality of elastic first O-rings are inserted into the first chamber in the circumferential groove. A plurality of fixing holes extending in a radial direction perpendicular to the central axis are formed on the outer peripheral surface so as to be in spatial communication with the first chamber. A plurality of fixing members are inserted and mounted in the fixing holes so as to localize the shaft portion of the cutting member inserted into the first chamber, and are formed in the tip portion to be depressed downward in the axial direction. And has an opening communicating with the communication hole and the outside. A surface portion is formed, and the spherical surface portion is formed into a spherical shape, and a nozzle that can be rotated by the spherical surface portion is attached to the nozzle, and the lubricant passes through the opening and communicates with the communication hole. Thus, a through-hole that is ejected to the outside is formed, and the second surrounding wall is provided with a supporting means that abuts against the shaft portion of the cutting member inserted from the tip end side to position the cutting member. The support means includes a fixing bolt and an elastic second O-ring, and the fixing bolt is inserted into the second chamber from the base end side of the holder body so as to be able to advance and retreat in the axial direction. A main shaft portion that is inserted through the second chamber, and an insertion end portion that has an end surface that abuts against the shaft portion of the cutting member that is inserted from the tip end side, and the insertion end portion. Communicates with the second chamber So as to have a transverse groove formed by being cut out obliquely from the end surface over the entire circumference and radially inward from the outer peripheral surface, inward in the radial direction from the outer peripheral surface of the insertion end portion. A contact portion that is notched and has a diameter that decreases downward in the axial direction is provided, and in the lateral groove, the shaft portion of the cutting member in which the second O-ring is inserted into the first chamber beyond the end face And the second O-ring is inserted into the first chamber beyond the end face when the second O-ring is mounted in the transverse groove. It has the outer peripheral part which can contact the axial part of a member and the internal peripheral surface of the said 2nd surrounding wall, It is characterized by the above-mentioned.

  In the tool holder according to the present invention, a plurality of circumferential grooves communicating with the first chamber are formed on the first surrounding wall, and a lateral groove communicating with the second chamber is formed at the insertion end of the fixing bolt. The first and second O-rings having elasticity are attached to the circumferential grooves and the lateral grooves. If it does in this way, the vibration by the contact of a cutting member and a process target can be suppressed as much as possible. Therefore, a processed product having excellent cutting accuracy can be obtained, and the cutting member can be used for a long time.

It is a perspective view showing one embodiment of a tool holder for cutting tools concerning the present invention. It is a longitudinal cross-sectional view of FIG. It is a longitudinal cross-sectional view which shows the state which is contacting with a workpiece | work using the cutting tool and performing the cutting operation. A state where the lubricant supply path communicates with the outside through the lubricant communication hole is shown. The lubricant supply path is shown in a state where the lubricant communication hole is blocked without communicating with the outside. It is a perspective view which shows the tool holder for the conventional cutting tool. It is a longitudinal cross-sectional view of the conventional tool holder. It is a longitudinal cross-sectional view which shows the prior art example of the state which is contacting with a workpiece | work using the cutting tool and performing the cutting operation.

  Hereinafter, an embodiment for carrying out the present invention will be described with reference to the drawings. However, the embodiments described below are provided with various technically preferable limitations for carrying out the present invention, but the scope of the invention is not limited to the following embodiments and illustrated examples.

  The tool holder is for holding a cutting member 100 (see FIG. 3) having a cutting portion and a shaft portion that are cutting blades for cutting, drilling, and grinding of the workpiece 105 that is a processing target, for example. And has a holder body 1 formed in a hollow sleeve shape along an axial direction which is a direction along its own central axis.

  The holder main body 1 has a distal end portion 101 that is the upper side in the axial direction and a proximal end portion 102 that is the lower side in the axial direction. The holder main body 1 has a center of the holder main body 1 from the distal end portion 101 to the proximal end side. A central hole 11 is formed that surrounds the shaft, and a communication hole 15 that is displaced parallel to the central hole 11 and is installed from the outer peripheral surface to the tip side.

  The central hole 11 has a first chamber 111 for mounting and holding the cutting member 100 on the distal end 101 side, and a second chamber 112 having a diameter larger than that of the first chamber 111 following the first chamber 111. The first surrounding wall 113 defining the first chamber 111 and the second surrounding wall 114 defining the second chamber 112 are defined by the inner peripheral surface of the first surrounding wall 113. The axially downward shoulder 115 is formed between the inner peripheral surface of the second surrounding wall 114 and the first surrounding wall 113 is formed between the first surrounding wall 113 and the second surrounding wall 114. And the collar part protruded over the perimeter from the outer peripheral surface so that it may be larger diameter than the 2nd surrounding wall 114 is formed.

  The first surrounding wall 113 has a plurality of circumferential grooves 13 that are recessed in a circumferential direction that is around the central axis from the inner circumferential surface on the first chamber 111 side so as to communicate with the first chamber 111. Are formed on the outer peripheral surface so as to be in spatial communication with the first chamber 111 extending along the radial direction perpendicular to the central axis. Has been. A plurality of elastic first O-rings 5, 5,... Are mounted corresponding to the circumferential grooves 13 so as to be in frictional contact with the shaft portion of the cutting member 100 inserted into the first chamber 111. Yes. A plurality of fixing members 2 are inserted into the fixing holes 12 and screwed so that the shaft portion of the cutting member 100 is fixed in place. The fixing member 2 is a screw, for example, and the fixing hole 12 is a screw hole.

  The communication hole 15 is provided in parallel with the central hole 11 so as to communicate with the outside from the tip of the first surrounding wall 113 to the second surrounding wall 114 so as to accommodate the lubricant.

  A spherical portion 151 having an opening communicating with the communication hole 15 and the outside is formed in the tip portion 101 so as to be recessed downward in the axial direction. A nozzle 3 that can be rotated by the spherical portion 151 is attached to the spherical portion 151, and the nozzle 3 has a spherical shape.

  The nozzle 3 is formed with a through hole 31 that communicates with the communication hole 15 through the opening of the spherical portion 151 and through which the lubricant passes and is ejected to the outside. The through-hole 31 has a truncated cone shape when the nozzle 3 rotates and the communication hole 15 communicates with the outside.

  The second surrounding wall 114 is provided with a supporting means that abuts against the shaft portion of the cutting member 100 inserted from the front end side of the tool holder 1 so that the cutting member 100 is positioned. In this embodiment, the support means is composed of a fixing bolt 6 and a second O-ring 7. The fixing bolt 6 is inserted and connected to the second chamber 112 from the base end side of the holder body 1 so as to be able to advance and retreat in the axial direction, and the fixing bolt 6 includes a main shaft portion 61 inserted into the second chamber 112, And an insertion end portion 62 having an end surface 621 that abuts against the shaft portion of the cutting member 100 inserted from the tip end side of the tool holder 1. The insertion end 62 has a lateral groove 63 that is cut away from the end surface 621 at an angle and radially inward from the outer peripheral surface so as to communicate with the second chamber 112 and has a triangular cross section. A conical portion having a reverse truncated cone shape is provided so as to be notched inward in the radial direction from the outer peripheral surface of the insertion end portion 62 and become smaller in diameter in the downward direction in the axial direction. The lateral groove 63 is elastic so as to come into contact with the shaft portion of the cutting member 100 inserted into the first chamber 111 beyond the end surface 621 so as to abut against the shoulder portion 115 and the inner peripheral surface of the second surrounding wall 114. A second O-ring 7 is provided. The second O-ring 7 has an outer peripheral portion 71 that can come into contact with the shoulder 115 and the inner peripheral surface of the second surrounding wall 114 when mounted in the lateral groove 63.

  A positioning hole 17 extending along the axial direction is provided adjacent to the spherical surface portion 151 at the tip of the first surrounding wall 113, and a positioning member 4 for positioning the nozzle 3 is attached to the positioning hole 17. ing. In this embodiment, the localization member 4 is a screw composed of a large-diameter head and a screw shaft having a smaller diameter than the head, and the localization hole 17 is a screw hole into which the screw is screwed.

  When the head of the screw serving as the localization member 4 is screwed into the screw hole serving as the localization hole 17 adjacent to the nozzle 3, the communication position (see FIG. 4) and the communication hole 15 can be rotated and held at the blocking position (FIG. 5) that blocks the communication hole 15 from the outside.

  Next, the operation of the tool holder according to the present invention will be described with reference to FIGS.

  When the cutting member 100 is integrally attached to the tool holder according to the present invention and the workpiece 105 is cut, when the nozzle 3 is rotated from the blocking position of FIG. 5 to the communication position of FIG. The communication hole 15 communicates with the outside through the. At this time, the lubricant is ejected toward the workpiece 105 through the communication hole 15 and the through hole 31. For example, as shown in FIG. 2 and FIG. 3 (FIG. 4), the rotating position of the nozzle 3 can be held by the positioning member 4, so that the direction of the through hole 31 toward the work outlet is directed to Can be adjusted. When the cutting process on the workpiece 105 is finished, the nozzle 3 is rotated from the communication position in FIG. 4 to the blocking position in FIG. 5, and the through hole 31 is closed by the first surrounding wall 113. Thus, the communication hole 15 can be prevented from communicating with the outside.

  When cutting the workpiece 105, it vibrates when the cutting member 100 contacts the workpiece 105. In the tool holder according to the present invention, elastic O-rings 5, 5,..., 7 are attached to the plurality of circumferential grooves 13, 13,. Contact vibration with the workpiece 105 can be greatly suppressed. Thereby, noise due to contact vibration can be greatly reduced, and wear of the cutting edge of the cutting member 100 can be suppressed as much as possible. Accordingly, a processed product having excellent cutting accuracy can be obtained, and the cutting member 100 can be used for a long time.

  The tool holder according to the present invention is useful for a cutting tool that reduces machining noise and is intended to be used for a long time.

105 Workpiece 115 Shoulder portion 5 First O-ring 100 Cutting member 12 Fixing hole 6 Fixing bolt 1 Holder body 13 Circumferential groove 61 Main shaft portion 101 Tip portion 15 Communication hole 62 Insertion end portion 102 Base end portion 151 Spherical surface portion 621 End surface 11 Center Hole 17 Orientation hole 63 Horizontal groove 111 First chamber 2 Fixing member 7 Second O-ring 112 Second chamber 3 Nozzle 71 Outer peripheral portion 113 First surrounding wall 31 Through hole 114 Second surrounding wall 4 Localizing member

Claims (5)

It is for holding a cutting member for processing a workpiece to be processed, and has a holder body formed in a hollow sleeve shape along an axial direction that is a direction along its own central axis,
The holder body has a distal end portion that is the upper side in the axial direction and a proximal end portion that is the lower side in the axial direction, and surrounds the central axis of the holder body from the distal end portion to the proximal end portion side. A defined central hole, and a communication hole installed parallel to the central hole and disposed from the outer peripheral surface of the holder body to the tip end side, are formed,
The central hole defines the first chamber so as to have a first chamber for mounting and holding the cutting member on the tip end side, and a second chamber extended from the first chamber. A first enclosure wall formed and a second enclosure wall defining the second chamber;
The first surrounding wall has a plurality of peripheral grooves that are recessed in a circumferential direction that is a direction along the central axis from an inner peripheral surface on the first chamber side so as to communicate with the first chamber. Formed,
A plurality of elastic first O-rings are attached to the circumferential groove so as to be in frictional contact with the shaft portion of the cutting member inserted into the first chamber,
A plurality of fixing holes extending along a radial direction that is a direction perpendicular to the central axis are formed in the outer peripheral surface so as to communicate spatially with the first chamber, and a plurality of fixing members are the first fixing member. Inserted into the fixing hole so as to localize the shaft portion of the cutting member inserted in the chamber of
The tip portion is formed to be depressed downward in the axial direction, and a spherical portion having an opening communicating with the communication hole and the outside is formed,
The spherical surface portion has a spherical shape and is mounted with a nozzle that can be rotated by the spherical surface portion. The nozzle is in communication with the communication hole through the opening and the lubricant passes through and is ejected to the outside. Through-holes are formed,
The second enclosing wall is provided with a supporting means for abutting the shaft portion of the cutting member inserted from the tip end side to position the cutting member,
The support means is composed of a fixing bolt and a resilient second O-ring,
The fixing bolt is inserted and connected to the second chamber from the proximal end side of the holder main body so as to be capable of moving back and forth in the axial direction, and a main shaft portion that is inserted into the second chamber; And an insertion end portion having an end surface that abuts against the shaft portion of the cutting member inserted from above, and the insertion end portion is inclined from the end surface over the entire circumference so as to communicate with the second chamber, and Cut out radially inward from the outer peripheral surface of the insertion end and become smaller in diameter in the axial direction so as to have a lateral groove formed by cutting inward in the radial direction from the outer peripheral surface. A conflicting part is provided,
In the lateral groove, the second O-ring is provided so as to contact the shaft portion of the cutting member inserted into the first chamber beyond the end surface and the inner peripheral surface of the second surrounding wall,
When the second O-ring is mounted in the lateral groove, the second O-ring is in contact with the shaft portion of the cutting member inserted into the first chamber beyond the end surface and the inner peripheral surface of the second surrounding wall. A tool holder characterized by having an outer peripheral portion that can be used.   The tool holder according to claim 1, wherein the contact portion is formed in an inverted truncated cone shape so that a cross section of the lateral groove is formed in a triangular shape. The first chamber is formed smaller in diameter than the second chamber,
A downward shoulder portion in the axial direction is formed between the first surrounding wall and the second surrounding wall,
The tool holder according to claim 1 or 2, wherein the second O-ring is attached to the lateral groove so as to contact the shoulder portion beyond the end face.   The tool holder according to any one of claims 1 to 3, wherein the through-hole is formed in a truncated cone shape.   Furthermore, it has a localization member attached so that it might insert from the front end side of the said 1st surrounding wall adjacent to the said nozzle for localizing the rotation position of the said nozzle. The tool holder of any one of Claims.

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