JP5524695B2 - Tool holder - Google Patents

Description

  The present invention relates to a construction technique of a tool holder for gripping a tool used for machining and providing it for a predetermined machining operation.

  Conventionally, in a tool used for machining, various discharge structures for discharging machining waste such as chips and chips generated during machining have been proposed. For example, Patent Document 1 below discloses a chip discharging mechanism for a turning tool. This chip discharge mechanism has a configuration in which the suction mechanism is externally attached to the chip discharge space of the cutting tool. When this type of discharge structure is employed in a tool holder that holds a tool, the structure is complicated. Therefore, there arises a problem that the cost increases.

JP 10-43988 A

  Therefore, the present invention has been made in view of the above points, and is effective in rationally discharging machining wastes such as chips and chips generated during machining in a tool holder that holds a tool used for machining. The issue is to provide technology.

  The present invention is configured to solve the above problems. Note that the present invention is intended for a tool holder that holds a tool, and the “tool” here includes a wide range of tools used for drilling, grinding, polishing, tightening, and the like. The

  A tool holder according to the present invention is configured as a holder for holding a tool extending in a long axis shape (also referred to as “clamping” or “holding”) and performing a predetermined processing operation. , An air inlet, an air outlet, an air flow path, a throttle channel, and an air suction path. The “predetermined processing operation” here typically includes operations such as drilling, grinding, polishing, and tightening. Note that the tool held by the tool holder may be a component of the tool holder or may be configured as an element different from the tool holder. That is, not only the tool holder in a state where the tool is gripped but also the tool holder in a state before the tool is gripped are included in the category of the “tool holder” of the present invention.

  The holder body forms a housing for the tool holder. The housing may be configured as a housing that forms an outline of the tool holder itself, or, in a state where the tool is attached to the processing machine together with the tool holder, the housing that forms the outline of the tool holder itself and the housing of the processing machine. It may be configured. When using the tool, the tool is gripped via a tool gripping mechanism attached to the holder body.

The air introduction port is provided in the holder body and is configured as an opening portion to which an air supply source is connected. Air supplied from an air supply source is introduced into the holder body through the air inlet. The air outlet is configured as an opening provided in the holder body. Air is discharged from the holder body through the air outlet. The air circulation path is configured as a path that connects the air inlet and the air outlet and through which the air supplied from the air supply source flows from the air inlet to the air outlet. The throttle channel is configured as a region where the channel cross-sectional area is relatively constricted in the air circulation path, that is, a region where the channel cross-sectional area is suppressed more than other areas of the air circulation channel. Thereby, the air flowing through the air flow path has a relatively high flow velocity when passing through the throttle channel. The air suction path connects the throttle flow path of the air flow path and the tool tip area of the tool, and sucks air in the tool tip area into the air flow path by negative pressure generated when air flows through the throttle flow path. Configured as a route. This air suction path may be constituted by a flow path in the tool, or may be constituted by another member attached along the tool. The air flow path communicates with the first flow passage and the first flow passage extending from the air introduction port to the tool gripping mechanism side along the extending direction of the holder main body while penetrating the holder main body. A reversal space, a merge space communicating with the reversal space via the throttle channel, and a second space that communicates with the merge space and extends in a direction opposite to the first flow path while penetrating the holder body. The reversing space, the merging space, and the second flow passage are disposed in the direction opposite to the tool gripping mechanism along the extending direction of the holder.

According to the above configuration, by introducing the air of the air supply source into the holder body from the air inlet when the workpiece is processed by the tool, the processing waste such as chips and chips generated at the time of processing is reduced in the tool tip region. The air can be sucked into the air circulation path through the air suction path and discharged from the air outlet of the holder body through the air circulation path. In this structure, since an air circulation path is comprised using a holder main body, it is rational.
Moreover, it is preferable that the said air suction path is comprised by the through-hole penetrated between the tool front-end | tip part and tool rear-end part of a tool. According to such a configuration, a rational structure using the through hole in the tool is realized with respect to the air suction path.

Moreover, in the tool holder of the further form concerning this invention, the said holder main body is extended elongate along the major axis direction of a tool, and the tool holding mechanism is attached to the holder front end side of the said holder main body, It is preferable that the air inlet is provided on the side opposite to the tool gripping mechanism.

Moreover, in the tool holder of the further form concerning this invention, it is preferable that the said air flow path is the structure containing a 3rd flow path. The third flow path is provided as a flow path provided in communication with the second flow path and extending in the radial direction of the holder body while penetrating the holder body.
In such a configuration, processing is performed by transferring the air introduced from the air introduction port on the rear end side of the holder, which is separated from the tool, out of the elongated holder body to a position close to the through hole of the tool. After the scrap is sucked, the air containing the processing scrap is transferred to a position away from the tool and discharged out of the holder body. As a result, it is possible to suck and discharge the processing waste with a relatively simple structure. Moreover, it becomes possible to give a freedom degree to the discharge destination of the air containing the processing waste with respect to the extending direction of the holder body.

Moreover, in the tool holder of the further form concerning this invention, the said holder main body is connected to the drive part by the side of a processing machine, and is comprised as a rotary body rotated around the major axis of a tool by the said drive part. Is preferred. Moreover, it is preferable that a tool holder is a structure provided with a fixing member, a discharge port, and a guidance | induction part. The fixing member is configured as a member that is fixed to the processing machine side and supports the holder body so as to be able to rotate around the long axis of the tool. The discharge port is configured as an opening provided in the fixing member. The guide portion is attached to the fixed member and is configured as a member that guides (guides) the air led out from the air lead-out port to the discharge port.
According to such a configuration, in the tool holder of the type in which the holder main body is rotationally driven during processing of the workpiece, the air including the machining waste led out from the air outlet port of the holder main body as the rotation side member, It becomes possible to discharge in a fixed direction through the discharge port provided in the fixed side member.

In another form of the tool holder according to the present invention, it is preferable that the air flow path includes a discharge port. The discharge port is configured as an opening provided in communication with the second flow path on the air inlet side of the holder body.
In such a configuration, processing is performed by transferring the air introduced from the air introduction port on the rear end side of the holder, which is separated from the tool, out of the elongated holder body to a position close to the through hole of the tool. After the scraps are sucked, the air containing the processing scraps is transferred to a position away from the tool, particularly to a discharge port on the air inlet side of the holder body, and is discharged out of the holder body. As a result, it is possible to suck and discharge the processing waste with a relatively simple structure. Moreover, it becomes possible to give a freedom degree to the discharge destination of the air containing the processing waste with respect to the extending direction of the holder body.

  As described above, according to the present invention, in the tool holder that holds a tool used for machining, it is possible to rationally discharge machining waste such as chips and chips generated during machining.

It is a figure which shows the longitudinal cross-section of the tool holder 100 of one Embodiment concerning the "tool holder" of this invention. It is a figure which shows the cross-section regarding the AA line of the tool holder 100 in FIG. FIG. 3 is a perspective view of a regulating member 170 in FIGS. 1 and 2.

  Below, the concrete structure and effect of the tool holder of one Embodiment in this invention are demonstrated based on drawing.

  FIG. 1 shows a longitudinal sectional structure of a tool holder 100 according to an embodiment of the “tool holder” of the present invention, and FIG. 2 relates to the line AA of the tool holder 100 in FIG. A cross-sectional structure is shown. FIG. 3 is a perspective view of the regulating member 170 in FIGS. 1 and 2.

  As shown in FIG. 1, the tool holder 100 according to the present embodiment is configured as a holder for gripping (also referred to as “holding” or “holding”) a tool 200 that performs a predetermined processing operation of a workpiece (not shown). Is done. The tool holder 100 holds the long-axis tool 200 and is attached to the processing machine 10 together with the tool 200. The “predetermined processing operation” here typically includes operations such as drilling, grinding, polishing, and tightening.

  The processing machine 10 is configured as a well-known machine tool body, and includes a frame 12, a spindle 14, and a bearing 16. The spindle 14 has a tapered mounting hole 15, and a spindle 110 described later of the tool holder 100 is mounted in the mounting hole 15. The spindle 14 is rotationally driven around the axis of the tool 200 via a bearing 16 with respect to the frame 12 as a fixed side member. The spindle 14 here corresponds to the “drive unit on the processing machine side” in the present invention.

  In the present specification, the side on which the tool 200 is gripped in the extending direction of the tool holder 100, that is, the right side in the drawing indicated by the symbol “FR” in FIG. The side, that is, the left side in the figure is defined as the “holder rear end side”.

  The tool holder 100 generally includes a main shaft 110, a tool gripping mechanism 120, a case 130, a suction mechanism 140, a discharge member 160, a regulating member 170 and a positioning mechanism 180.

  The main shaft 110 is a member configured as a holder main body that forms a housing of the tool holder 100, and is a metal member that extends in a long shape along the axial direction of the tool 200 as a whole. The main shaft 110 has a rear end portion 110a on the rear end side of the holder mounted in a mounting hole 15 provided in the spindle 14 of the processing machine 10, and is rotationally driven by the spindle 14 when processing a workpiece. The tool gripping mechanism 120 is integrally attached to the front end portion 110b (holder front end side) of the main shaft 110.

  The main shaft 110 includes an accommodation space 112 and a communication hole 114. The accommodation space 112 is formed so as to extend in the elongated direction in the extending direction of the main shaft 110 in the intermediate portion 110 c of the main shaft 110, and is configured as an accommodation space for accommodating the suction mechanism 140. The communication hole 114 is configured as a communication hole that communicates between the first opening 114 a on the spindle 14 side and the second opening 114 b on the accommodation space 112 side at the rear end portion 110 a of the main shaft 110. In a state where the main shaft 110 is mounted on the processing machine 10, the first opening 114a of the communication hole 114 is connected to an air supply source (not shown). The first opening 114 a is an opening portion for introducing air from an air supply source into the main shaft 110, and is provided at the rear end portion 110 a on the opposite side of the main shaft 110 from the tool gripping mechanism 120. The first opening 114a referred to here corresponds to an “air inlet” in the present invention.

  The tool gripping mechanism 120 is configured as a mechanism for gripping the tool rear end portion 202 of the tool 200 configured in a long axis shape. The tool 200 includes a through-hole 210 extending in a long shape between the tool front end portion 201 and the tool rear end portion 202 along the long axis direction. The through-hole 210 here corresponds to a “through-hole” in the present invention, and constitutes an “air suction path” to be described later. The tool tip 201 of the tool 200 is configured as a part facing the tool tip region B on the workpiece side among the parts of the tool 200, and the tool rear end 202 is the suction mechanism 140 among the parts of the tool 200. It is configured as a part facing the surface. The tool tip 201 is configured as a processing blade for processing a workpiece. The tool 200 typically includes a tool used for drilling, grinding, polishing, tightening, and the like. The tool gripping mechanism 120 here corresponds to a “tool gripping mechanism” in the present invention. Further, the tool 200 gripped by the tool gripping mechanism 120 corresponds to a “tool” in the present invention.

  The case 130 is configured as a cylindrical member fixed to the processing machine 10 side, and accommodates the intermediate portion 110c of the main shaft 110 via a bearing 131 in the cylinder. By the case 130, the intermediate portion 110c of the main shaft 110 is supported so as to be able to rotate around the long axis of the tool 200.

  The suction mechanism 140 is configured as a suction mechanism that sucks solid processing waste such as chips and chips generated in the tool tip region B during processing of the workpiece, and is integrated into the main shaft 110 integrally. The suction mechanism 140 includes an air circulation member 141 and a throttle member 150. This suction mechanism 140 constitutes a housing portion of the main shaft 110 by being incorporated in the main shaft 110, and constitutes the “holder body” in the present invention together with the main shaft 110.

  As shown in FIGS. 1 and 2, the air circulation member 141 includes an introduction space 142, a first flow passage 143, an inversion space 144, a merge space 145, a second flow passage 146, and a lead-out space 147.

  The introduction space 142 is configured as an opening portion connected to the second opening 114 b of the communication hole 114 formed in the main shaft 110. The air flowing through the communication hole 114 of the main shaft 110 is introduced into the first flow passage 143 through the introduction space 142.

  The first flow path 143 is connected to the holder front end side of the introduction space 142 and is a flow path extending along the extending direction of the main shaft 110 between the introduction space 142 and the inversion space 144. The first flow passage 143 is indicated by a broken line in FIG. 1 and is indicated by a solid line in FIG. The first flow passage 143, along with the communication hole 114 and the introduction space 142 described above, flows through the main shaft 110 or the air flow member 141 and extends toward the tool gripping mechanism 120 along the extending direction of the main shaft 110. The first flow passage 143, the communication hole 114, and the introduction space 142 constitute the “first flow passage” in the present invention.

  The inversion space 144 is configured as a space portion connected to the holder front end side of the first flow passage 143 and connected to the holder front end side of the inversion space 144. Accordingly, the air flowing through the first flow passage 143 to the holder front end side (right side in FIG. 1) is reversed in the flow direction in the reversing space 144 and flows to the holder rear end side (left side in FIG. 1). After that, it moves to the merge space 145.

  The merge space 145 is configured as a space portion that is connected to the inversion space 144 and a through-hole 151 (described later) of the throttle member 150 and connected to the tip end side of the holder of the second flow passage 146. In addition, a constricted flow path 152 described later is formed in the merge space 145. With such a configuration, the air that has flowed through the reversing space 144 and the air that has flowed through the through hole 151 of the throttle member 150 merge in the merge space 145 toward the second flow passage 146 (see FIG. 1). Flows to the middle left).

  The second flow path 146 is connected to the holder rear end side of the merge space 145, and serves as a flow path extending along the extending direction of the main shaft 110 between the merge space 145 and the lead-out space 147. The second flow passage 146 is indicated by a solid line in FIG. 1 and FIG. The second flow passage 146 forms a flow passage that extends along the extending direction of the main shaft 110 to the side opposite to the tool gripping mechanism 120 while penetrating the air circulation member 141 together with the above-described merge space 145. The second flow passage 146 and the merge space 145 constitute the “second flow passage” in the present invention.

  The lead-out space 147 is configured as a space portion connected to the holder rear end side of the second flow passage 146 and connected to the lead-out opening 116 formed in the main shaft 110. The lead-out space 147 is configured as a space portion extending in the radial direction. The lead-out space 147 extends from the second flow passage 146 to the radially outer side (radial direction) of the main shaft 110 while passing through the air circulation member 141 (extending in a direction intersecting with the extending direction of the main shaft 110). ) The flow path, and the derived space 147 constitutes the “third flow path” in the present invention.

  The lead-out opening 116 of the main shaft 110 is disposed on the radially outer side of the lead-out space 147 and is configured as a flow passage that connects the lead-out space 147 and a discharge port 161 (described later) of the discharge member 160. Therefore, the air that has flowed through the second flow passage 146 flows to the discharge port 161 of the discharge member 160 through the discharge space 147 and the discharge opening 116. The lead-out opening 116 here is an opening portion through which the air flowing through the main shaft 110 is led out of the main shaft 110, and the lead-out opening 116 corresponds to an “air lead-out port” in the present invention.

  The aperture member 150 is configured as a cylindrical member having a through hole 151 in the cylinder. One end of the through hole 151 is connected to the through hole 210 of the tool 200 at the tool rear end portion 202, and the other end is connected to the merge space 145 of the air circulation member 141. Further, the throttle member 150 is inserted into the merge space 145 in a state where a throttle channel 152 is formed between the throttle member 150 and the air circulation member 141. The throttle channel 152 is a facing space formed by the inner peripheral surface of the air flow member 141 and the outer peripheral surface of the throttle member 150 facing each other. The throttle channel 152 is configured as a channel whose channel cross-sectional area is relatively throttled (suppressed) compared to the first flow channel 143 and the inversion space 144. The throttle channel 152 here corresponds to the “throttle channel” in the present invention.

  With the above configuration, the air introduced from the air supply source into the main shaft 110 through the first opening 114a of the communication hole 114 has the communication hole 114, the introduction space 142, the first flow passage 143, the inversion space 144, the merge space 145, the first It is led out of the main shaft 110 through a series of air flow paths constituted by the two flow passages 146 and the lead-out space 147. This series of air flow paths connects the first opening 114a as the air inlet and the outlet opening 116 as the air outlet, and the air supplied from the air supply source passes from the first opening 114a to the outlet opening 116. An air distribution path that circulates and constitutes an “air distribution path” in the present invention.

  In addition, with the above configuration, the path formed by the through hole 151 of the throttle member 150 and the through hole 210 of the tool 200 is configured as a path that connects the merge space 145 of the air flow member 141 and the tool tip region B of the tool 200. Is done. The path is an air suction path for sucking the air in the tool tip region B into the merge space 145 by the negative pressure generated when air flows through the throttle channel 152 of the air flow member 141. "Suction path" is configured.

  The discharge member 160 is configured as a cylindrical member that is attached and fixed to the case 130 together with the regulating member 170, and accommodates the intermediate portion 110c of the main shaft 110 in the cylinder. The discharge member 160 includes a discharge port 161 extending in the radial direction. The discharge port 161 is configured as a discharge port for discharging the air flowing from the lead-out space 147 of the air circulation member 141 to the lead-out opening 116 of the main shaft 110 to the atmosphere side. Here, the discharge member 160 is configured to be attached and fixed to the case 130, and constitutes a “fixing member” in the present invention together with the case 130. Further, the discharge port 161 provided in the discharge member 160 corresponds to the “discharge port” in the present invention.

As shown in FIG. 3, the restricting member 170 is provided in a cylindrical main body 171 attached to the case 130 and connected to the main body 171, and disposed in the outlet opening 116 of the main shaft 110. And a guiding unit 172. The guiding portion 172 further includes a first arc surface 172a and a second arc surface 172b.

  The first arc surface 172a is configured as an arc surface extending in a direction intersecting with the extending direction of the outlet opening 116. Therefore, the first arcuate surface 172a has a function of converting the air flow that flows radially outward (radial direction) through the outlet opening 116 of the main shaft 110 into a swirling air flow along the circumferential direction of the main body 171. Fulfill. On the other hand, the second arc surface 172b is configured as an arc surface extending in a direction intersecting the circumferential direction of the main body portion 171. Accordingly, the second arc surface 172b has a function of converting the swirling air flow converted by the first arc surface 172a into an air flow radially outward (radial direction) of the discharge port 161 of the discharge member 160. Fulfill. The guide portion 172 (regulating member 170) here corresponds to the “guide portion” in the present invention. Thus, the guiding portion 172 includes both the first arc surface 172a and the second arc surface 172b, so that the air flowing through the outlet opening 116 of the main shaft 110 as the rotating body can be discharged from the discharging member 160 as the fixed body. The function of smoothly guiding to the outlet 161 is achieved.

  The positioning mechanism 180 is a mechanism for positioning the main shaft 110 and includes a locking pin 181 that prevents the rotation of the main shaft 110 with respect to the case 130. In a state before the main shaft 110 is mounted on the processing machine 10, the main shaft 110 is prevented from rotating by engaging the locking pin 181 with the locking member 115 attached to the main shaft 110, thereby positioning the main shaft 110. Is made. On the other hand, when the main shaft 110 is mounted on the processing machine 10, the engagement between the locking member 115 and the locking pin 181 is released. Thereby, in a state where the main shaft 110 is mounted on the processing machine 10, the rotation of the main shaft 110 with respect to the case 130 is allowed.

  Next, the effect of the tool holder 100 having the above-described configuration will be described with reference to FIGS. 1 and 2.

  During the machining operation for machining the workpiece with the tool 200, the spindle 14 of the processing machine 10 is rotationally driven, so that the main shaft 110 mounted on the spindle 14 is similarly rotationally driven around the long axis of the tool 200. The During this rotational driving of the spindle 14, the tool holder 100 is divided into a rotating side member that is rotationally driven together with the main shaft 110 and a stationary side member that is stationary along with the case 130. Examples of the rotation side member include the main shaft 110, the locking member 115, the tool gripping mechanism 120, the suction mechanism 140, and the tool 200. On the other hand, examples of the stationary member include a case 130, a discharge member 160, a regulating member 170, and a positioning mechanism 180.

  In addition, air is supplied from an air supply source on the processing machine 10 side during processing of the workpiece. After this air is introduced into the first opening 114a of the main shaft 110, it continuously flows in accordance with the first air flow indicated by the black arrows in FIG. Specifically, the air that has flowed from the communication hole 114 toward the tip of the holder (right side in FIG. 1) up to the second opening 114 b is then introduced into the introduction space 142 of the air circulation member 141. In the air circulation member 141, the air further flows through the first flow passage 143 to the holder front end side (the right side in FIG. 1) and is then introduced into the inversion space 144. In the inversion space 144, the air flow direction is reversed in the opposite direction, and then flows toward the merge space 145 toward the holder rear end side (left side in FIG. 1).

  Since the flow path cross-sectional area is narrowed by the throttle channel 152, the air flows in the confluence space 145 in a high speed state in which the flow velocity is relatively increased when flowing through the throttle channel 152 (see FIG. (Leftward direction in 1) toward the second flow passage 146. At this time, the air flow from the merge space 145 to the second flow passage 146 causes a negative pressure state (also referred to as “vacuum state”) of air in the region on the through hole 151 side of the merge space 145. As a result, the air in the through hole 151 of the throttle member 150 is sucked to the merge space 145 side by negative pressure, and the air in the through hole 210 of the tool 200 is also sucked to the merge space 145 side through the through hole 151 accordingly. Is done. As a result, a second air flow indicated by a white arrow in FIG. 1 is continuously formed between the merge space 145 of the air flow member 141 and the tool tip 201 of the tool 200. Therefore, the chips C generated in the tool tip region B during machining are sucked from the tool tip part 201 side to the tool rear end part 202 side together with the air of the second air flow and introduced into the merge space 145. Is done.

  The air of the first air flow and the air of the second air flow (air containing the chips C) that merged in the merge space 145 flow through the second flow passage 146 to the holder rear end side, and then are led out. The flow is converted into a radially outward flow of the main shaft 110 at 147 and the outlet opening 116. Then, the air (air containing the swarf C) flowing through the outlet opening 116 is guided to the discharge port 161 of the discharge member 160 by the guide portion 172 of the restricting member 170 and is released from the discharge port 161 into the atmosphere. .

  At this time, on the first circular arc surface 172 a of the guide portion 172, the air flow that flows radially outward through the lead-out opening 116 of the main shaft 110 is converted into a swirling air flow along the circumferential direction of the main body portion 171. . Further, on the second arc surface 172 b of the guide portion 172, the swirling air flow converted by the first arc surface 172 a is converted into an air flow radially outward of the discharge port 161 of the discharge member 160. Thus, the air that flows through the outlet opening 116 of the main shaft 110 (air that includes the chips C) is guided to the discharge port 161 of the discharge member 160 by the guide portion 172 by both the first arc surface 172a and the second arc surface 172b. Is smoothly guided and discharged to the atmosphere through the discharge port 161 in a certain direction.

  As described above, according to the tool holder 100 of the present embodiment, air of the air supply source is introduced from the first opening 114a into the holder main body (the main shaft 110 and the air flow member 141) when the workpiece 200 is processed by the tool 200. By doing so, it is possible to suck the processing waste generated during the processing together with the air in the tool tip region B and discharge it from the outlet opening 116 of the holder body. In this structure, since an air circulation path is comprised using a holder main body, it is rational.

  Moreover, according to the said embodiment, regarding the air suction path | route which attracts | sucks the processing waste produced at the time of processing with the air of the tool front-end | tip area | region B, the rational structure using the through-hole 210 in the tool 200 is implement | achieved.

  Further, according to the above-described embodiment, the air introduced from the first opening 114 a on the rear end side of the holder, which is separated from the tool 200, in the elongated main shaft 110 is brought close to the through hole 210 of the tool 200. After the machining waste is sucked by being transferred to the position, the air containing the machining waste is transferred to a position separated from the tool 200 and discharged to the outside of the spindle 110. As a result, it is possible to suck and discharge the processing waste with a relatively simple structure. Further, with respect to the extending direction of the main shaft 110, it is possible to give a degree of freedom to the discharge destination of the air containing the machining waste.

  Moreover, according to the said embodiment, in the tool holder of the type by which the main axis | shaft 110 is rotationally driven in the case of the process of a workpiece, the processing waste led out from the 1st opening 114a of the main axis | shaft 110 as a rotation side member is included. The air can be discharged in a certain direction through the discharge port 161 provided in the discharge member 160 which is a fixed member.

[Other Embodiments]
In addition, this invention is not limited only to said embodiment, A various application and deformation | transformation can be considered. For example, each of the following embodiments to which the above embodiment is applied can be implemented.

  In the said embodiment, although the case where the air suction path | route of the process waste produced at the time of a process of a workpiece was comprised using the through-hole 210 in the tool 200 was described, in this invention, it is air by members other than the tool 200. A suction path can also be configured. For example, the structure which connects the tool tip area | region B and the through-hole 151 or the confluence | merging space 145 of the throttle member 150 by the tubular member adhere | attached along the extension direction of the tool 200 is also employable.

  Further, in the above embodiment, the first flow path extending toward the tool gripping mechanism 120 side along the extending direction of the main shaft 110, the tool along the extending direction of the main shaft 110 while penetrating the air circulation member 141. An air flow path is configured using a second flow path extending to the opposite side of the gripping mechanism 120 and a third flow path extending in the radial direction of the main shaft 110 while penetrating the air flow member 141. Although the case has been described, the extending direction of the flow path constituting the air flow path, the cross-sectional area of the flow path, the number of the flow paths, and the like can be appropriately changed as necessary. For example, instead of providing the third flow passage, the second flow passage of the embodiment shown in FIG. 1 is extended to be the second flow passage on the air inlet side of the holder body (main shaft 110). It is also possible to employ a configuration in which a communicating discharge port (an opening corresponding to the “discharge port” in the present invention) is provided and air containing processing waste is discharged to the processing machine 10 side through this discharge port.

  Moreover, in the said embodiment, although described about the tool holder 100 provided with the main axis | shaft 110 rotated at the time of processing of a workpiece, with respect to the tool holder of a structure where a holder main body is reciprocated at the time of processing of a workpiece, The present invention can also be applied.

DESCRIPTION OF SYMBOLS 10 ... Processing machine 12 ... Frame 14 ... Spindle 15 ... Mounting hole 16 ... Bearing 100 ... Tool holder 110 ... Main shaft 110a ... Rear end part 110b ... Front end part 110c ... Intermediate part 112 ... Storage space 114 ... Communication hole 114a ... First opening 114b ... second opening 115 ... locking member 116 ... leading opening 120 ... tool gripping mechanism 130 ... case 140 ... suction mechanism 141 ... air flow member 142 ... introducing space 143 ... first flow passage 144 ... reversing space 145 ... merging space 146 ... second flow passage 147 ... leading space 150 ... throttle member 151 ... through hole 152 ... throttle channel 160 ... discharge member 161 ... discharge port 170 ... regulating member 171 ... main body 172 ... guide portion 172a ... first arc surface 172b ... 2nd circular arc surface 180 ... positioning mechanism 181 ... locking pin 200 ... tool 201 ... tool front end 202 ... tool rear end 210 ... penetrating

Claims (5)

A tool holder for holding a tool extending in a long axis shape and providing it to a predetermined processing operation,
A holder body forming a housing of the tool holder;
A tool gripping mechanism attached to the holder body and gripping the tool;
An air inlet provided in the holder body to which an air supply source is connected;
An air outlet provided in the holder body;
An air flow path that connects the air inlet and the air outlet, and the air supplied from an air supply source flows from the air inlet to the air outlet;
A throttle channel whose channel cross-sectional area is relatively throttled in the air flow path;
The throttle flow path of the air flow path is connected to the tool tip area of the tool, and air in the tool tip area is sucked into the air flow path by negative pressure generated when air flows through the throttle flow path. An air suction path to
Including
The air flow path is
A first flow path extending from the air inlet to the tool gripping mechanism along the extending direction of the holder body while penetrating the holder body;
An inversion space communicating with the first flow path;
A merging space communicating with the inversion space via the throttle channel;
A second flow path provided in communication with the merge space and extending in a direction opposite to the first flow path while penetrating the holder body;
With
The reversal space, the merge space, and the second flow path are arranged in the direction opposite to the tool gripping mechanism along the extending direction of the holder,
The tool holder, wherein the air suction path is constituted by a through-hole penetrating between a tool front end portion and a tool rear end portion of the tool. The tool holder according to claim 1,
The holder body extends in a long shape along the long axis direction of the tool, the tool gripping mechanism is attached to a holder tip side of the holder body, and the air introduction is performed on the opposite side of the tool gripping mechanism. A tool holder characterized in that a mouth is provided. The tool holder according to claim 1 or 2 ,
The air flow path is configured to include a third flow path provided in communication with the second flow path and extending in the radial direction of the holder body while penetrating the holder body. Tool holder to be used. A tool holder according to any one of claims 1 to 3 ,
The holder body is connected to a driving unit on the processing machine side, and is configured as a rotating body that is driven to rotate about the long axis of the tool by the driving unit,
A fixing member fixed to the processing machine side and supporting the holder body so as to be able to rotate around the long axis of the tool;
An outlet provided in the fixing member;
A guiding portion attached to the fixing member and guiding the air led out from the air outlet to the outlet;
A tool holder comprising: a tool holder. The tool holder according to claim 1,
The tool holder according to claim 1, wherein the air flow path includes a discharge port provided in communication with the second flow path on the air inlet side of the holder body.

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