JPH0549230U - Tool holding device - Google Patents

Abstract

(57) [Abstract] [Purpose] When the machining direction changes or machining in the machine spindle direction is required in the head body that holds the tool tilted to the machine spindle axis of the machine tool, setup change is required. Save time. A head main body 1 is inclined with respect to a machine spindle 2 to support a tip shaft 10 on one side of the machine spindle 2, and the center position of a tool 15 held by a tool holder 14 at the tip of the tip spindle 10 is set to the machine spindle center. In addition, the main tool holder 5 is attached to the central shaft 3 supported by the head main body 1 on the main shaft center 2 of the machine so that the tool can be held.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for accurately and securely holding a tool in a machine tool.

[0002]

[Prior Art]

 In the conventional machine tool, as shown in FIG. 5, when the tool 31 is attached so as to be inclined with respect to the machine main axis 32, the front spindle 34 is inclined in the head main body 33 with respect to the machine main axis 32. Rotatably mounted on the shaft, a holder 36 is fixed to the tip of the tip shaft 34 by a tension bolt 35 extending from above, a tool 31 is chucked to the holder 36, and a speed increasing mechanism (not shown) in the head body 33 is used. The tool 31 is rotated at an increased speed to perform processing.

However, since the position of the tool center at the tip of the tool 31 is displaced from the machine spindle center 32, when the machining direction of the machine tool changes and the head body 33 is rotated around the machine spindle center 32, Since the position moves in the horizontal direction, it was necessary to re-position the center of the tool, which required a lot of man-hours for setup change. If the head main body 33 is attached to the machine spindle so that the tool 31 is inclined with respect to the machine spindle 32, the tool 31 cannot be arranged in the direction of the machine spindle 32. There is a problem that it is not possible to drill in the direction of, and low-speed tapping processing is performed, and the tool 31 is only held in the holder 36. Therefore, when the processing conditions by the tool 31 are severe, the tool 31 is removed from the holder 36. There was a risk of falling out.

[0004]

[Problems to be solved by the device]

 According to the first aspect of the present invention, when the tool is mounted obliquely with respect to the main axis of the machine, the position of the center of the tool does not move even if the machining direction of the machine tool changes, thereby facilitating the setup change. The second purpose is to enable the tool to be mounted in the machine spindle direction even when the tool is mounted diagonally to the machine spindle, and the tool can be removed from the tool holder. The third purpose is to reliably prevent

[0005]

[Means for Solving the Problems]

 In order to achieve these objects, a tool holding device according to the present invention comprises a head main body and a machine spindle which is tilted at one side of the machine spindle and tilted with respect to the machine spindle so as to be rotatably supported by the machine spindle. Fine adjustment of the driven spindle, the tool holder attached to the tip of the spindle, and the tool center position of the tool mounted on the spindle and held by the tool holder to match the machine spindle center It has an adjusting mechanism.

Further, the tool holding device according to the present invention is rotatably supported by the head body at one side of the head body and the machine spindle, tilted with respect to the machine spindle, and driven by the machine spindle. And a tool holder attached to the tip of the same spindle, and a main tool holder rotatably supported by the head body on the machine spindle and connected to the machine spindle.

Further, the tool holding device according to the present invention is rotatably supported by the head main body so as to be tilted at one side of the head main body and the machine main axis and inclined with respect to the machine main axis, and driven by the machine main axis. A leading shaft, a tool holder attached to the tip of the leading shaft, and a locking member for locking the end of the tool mounted on the leading shaft and held by the tool holder.

[0008]

[Action]

 Therefore, in the tool holding device according to the present invention, even if the tip shaft driven by the machine spindle is tilted and supported with respect to the machine spindle, the tip spindle is supported on one side of the machine spindle. , The tool center position of the tool held in the tool holder can be fine-tuned to match the machine spindle center by the adjustment mechanism attached to the spindle, so the head body is rotated around the machine spindle center for machining. Even if the direction is changed, the position of the tool center does not move, and therefore repositioning work can be completely eliminated.

Further, even if the front shaft driven by the machine main shaft is supported at an inclination with respect to the machine main shaft center, the front shaft is supported on one side of the machine main shaft center and is connected to the machine main shaft. Since the tool holder is rotatably supported by the head body on the machine spindle, if you remove the tool holder tool attached to the tip of the spindle, the tool body will not be removed from the head holder It can be attached and machined in the machine axis direction.

Further, a locking member is attached to a leading shaft that is rotatably supported by the head main body and tilted with respect to the machine main shaft center on one side of the machine main shaft, and is driven by the machine main shaft. Since the end of the tool held by the tool is locked, there is no possibility that the tool will slip out of the tool holder even when the tool is in severe use conditions. Damage to the processing machine is prevented, and stable processing operation can always be ensured.

[0011]

【Example】

 Hereinafter, embodiments of the present invention will be specifically described. In FIG. 1, a center shaft 3 rotatably supported on a machine main shaft center 2 of a head main body 1 attached to a machine tool is connected to a machine main shaft (not shown) via a holder 4, and the machine main shaft is The main tool holder 5 is attached to the lower end of the central shaft 3 by means of a rotary drive.

On the other hand, the intermediate shaft 6 that is rotatably supported by the head main body 1 while being inclined with respect to the machine main axis 2 has a bevel gear 7 and a bevel gear 8 fixed to the central shaft 2 and the intermediate shaft 6, respectively. The front shaft 10 which is speed-enhanced by one step and is rotatably supported by the head body 1 parallel to the intermediate shaft 6 on one side of the machine main shaft center 2 is fixed to the intermediate shaft 6 and the front shaft 10, respectively. The spur gear 11 and the spur gear 12 increase the speed of the second stage, and the shaft center 13 intersects the machine main shaft center 2 at the point A.

A tool holder 14 is attached to the tip of the tip shaft 10, and a tool 15 can be detachably attached to the tool holder 14. A screw hole 16 is penetrated through the tip shaft 10 along an axis 13. However, by removing the cap 20 of the head body 1, the adjusting screw 21 can be screwed in and removed from above the screw hole 16 as will be described later, and the outer diameter is smaller than the inner diameter of the screw hole 16. A pull bolt 18 having a screw 17 at its tip can be inserted into the screw hole 16 from above.

When mounting the tool 15 in the tool holding device, first, the cap 20 of the head main body 1 is removed, and as shown in FIG. 2, the hexagonal head 23 at the tip of the bolt 22 is moved in the axial direction of the adjusting screw 21. The adjustment screw 21 is screwed into the screw hole 16 from above by fitting it into the hexagonal recess 24 extending to the upper end, and the end face 25 of the tool 15 inserted into the tool holder 14 is attached to the lower end face 26 of the adjustment screw 21. It is brought into contact with each other, and fine adjustment of the adjusting screw 21 is performed so that the tool center position of the tool 15 is accurately aligned with the point A on the machine spindle 2.

Next, the tool 15 is held in that position by the tool holder 14, and then the adjusting screw 21 is taken out upward from the screw hole 16 by rotating the bolt 22 in the opposite direction, and then the tension bolt 18 is screwed into the screw hole 16. 16 is inserted from above, and a screw 17 at the tip thereof is screwed into a screw hole 27 extending in the axial direction of the tool 15, and the tool 15 is fixed to the front shaft 10 at that position.

That is, since the tool center position of the tool 15 held by the tool holder 14 exactly coincides with the point A on the machine spindle center 2, in order to change the machining direction, as shown by an arrow B in FIG. Even when the head main body 1 is rotated on the machine spindle 2, the tool center position of the tool 15 is always at the point A on the machine spindle 2, and therefore the tool conventionally required each time the machining direction is changed. It is not necessary to position the center of the tool 15 and the setup change time can be easily shortened.

Further, although the shaft center 13 of the tip shaft 10 is tilted with respect to the machine main shaft center 2, the front shaft 10 is arranged on one side of the machine main shaft center 2 and the tool 15 held by the tool holder 14 Since the center position of the tool is located at the point A on the machine spindle 2, if the tool 15 is removed from the tool holder 14 and the tool 30 is attached to the main tool holder 5 as shown in FIG. With the head body 1 attached, the tool 30 can immediately perform machining in the two directions of the machine main axis, and the setup time for attaching and detaching the attachments such as the head body 1 can be greatly shortened.

Further, since the tool 17 is fixed to the tip shaft 10 by screwing the screw 17 of the tension bolt 18 into the screw hole 27 of the tool 15, the machining conditions by the tool 15 are strict, and the tool holder 14 causes the tool 15 to move. Even if the holding force is insufficient, the tool 15 does not come out of the tool holder 14 at all, and therefore the tool 15 comes out of the tool holder 14 during machining and damages the work piece or the machine tool. Such a thing can be surely prevented.

[0019]

[Effect of the device]

 In the tool holding device according to the present invention, the position of the tool center of the tool held in the tool holder does not move from the machine spindle center even when the head body is rotated around the machine spindle axis to change the machining direction. This eliminates the need for repositioning the center of the tool and allows the tool to be attached to the main tool holder without removing the head body to perform machining in the machine spindle direction. Can be performed very easily and in a short time.

Further, since the end member of the tool held by the tool holder is locked by attaching the locking member to the tip shaft, the tool may not come out of the tool holder even when the usage condition of the tool is severe. Therefore, it is possible to reliably prevent the work piece or the processing machine from being damaged by the tool that has come out of the tool holder.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view of a main part of the above embodiment.

FIG. 3 is an explanatory view of the operation of the above embodiment.

FIG. 4 is a diagram for explaining another operation of the above embodiment.

FIG. 5 is a side view of a conventional device.

[Explanation of symbols]

 1 Head Main Body 2 Machine Spindle Center 3 Center Shaft 5 Main Tool Holder 10 Lead Axis 13 Lead Axis Shaft Center 14 Tool Holder 15 Tool 16 Screw Hole 17 Screw 18 Tension Bolt 21 Adjusting Screw 22 Bolt 27 Screw Hole A Shaft Center Crossing Point

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Toshihiko Takagi, 5-3-33 Shiba, Minato-ku, Tokyo Inside Mitsubishi Motors Corporation (72) Kunihiko Tanabe 5-33-8 Shiba, Minato-ku, Tokyo Mitsubishi Automotive Industry Co., Ltd.

Claims (3)

[Scope of utility model registration request] 1. A head main body, a front shaft that is rotatably supported in the head main body by being tilted with respect to the machine main shaft on one side of the machine main shaft, and is driven by the machine main shaft. And a tool holding device having an adjusting mechanism for finely adjusting the tool center position of the tool mounted on the tip shaft and held by the tool holder so as to match with the machine spindle center. 2. A head main body, a front shaft that is rotatably supported by the head main body at one side of the machine main shaft and inclined with respect to the machine main shaft, and is driven by the machine main shaft. A tool holding device having a tool holder and a main tool holder rotatably supported by the head main body on the machine spindle center and connected to the machine spindle. 3. A head main body, a front shaft that is rotatably supported by the head main body at one side of the machine main shaft and inclined with respect to the machine main shaft, and is driven by the machine main shaft. A tool holding device having a tool holder and a locking member which is mounted on the tip shaft and locks an end of a tool held by the tool holder.