JP2014056537A - Work holding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work holding device that rotates or rotationally moves on two axes and also holds a work in a cantilever fashion.SOLUTION: A work holding device which holds a work to be cut by a machining tool includes: a substantially channel-sectioned frame body which has one of a pair of mutually parallel side members connected and the other made free; support means arranged rotatably on an X axis of an XYZ orthogonal coordinate system by the pair of side members of the frame body; rotation means arranged at the support means and rotated on the X axis by the support means; and work holding means arranged rotatably on a Y axis by the rotation means and holding the work in the cantilever fashion on the free side of the frame body, and also has control means which controls the rotational angle of the support means on the X axis and the rotational angle of the rotation means by controlling the rotation means capable of rotating the work on the Y axis and first driving means for rotating the support means and second driving means for rotating the rotation means.

Description

  The present invention relates to a workpiece holding device, and more particularly to a workpiece holding device capable of holding a workpiece at a predetermined angle with respect to a processing tool.

Conventionally, in a cutting device that cuts a workpiece based on predetermined data by numerical control using a microcomputer or the like, a carriage on which a processing tool is attached and a workpiece holding device that holds the workpiece operate. The workpiece is brought into contact with the processing tool at a predetermined angle, and the workpiece is cut with a cutting tool to cut the workpiece into a desired shape.

Hereinafter, a cutting apparatus provided with a work holding device according to the prior art will be described with reference to FIGS. 1 and 2.

  FIG. 1 is a schematic configuration perspective view of a cutting apparatus provided with a workpiece holding device according to the prior art, and FIG. 2 is a schematic configuration showing a main part of the workpiece holding device according to the prior art. An illustration is shown.

The cutting apparatus 100 includes a fixed base member 102, side members 104L and 104R disposed at right and left ends of the base member 102 and orthogonal to the base member 102, and two left and right side members 104L and 104R. The rear member 106 to be connected, the guide rail 108 whose both ends are supported by the side members 104L and 104R and extended in the X-axis direction in the XYZ orthogonal coordinate system, and the both ends are the side members 104L and 104R, respectively. A shaft 110 that is supported and extended in the X-axis direction so as to be parallel to the guide rail 108, and is slidably mounted on each of the guide rail 108 and the shaft 110 and supported so as to be movable in the X-axis direction. Carriage 112, main shaft 114 arranged to be movable in the Z-axis direction on carriage 112, and workpiece Holds, is configured to have a work holding device 120 to be freely arranged movable in the Y-axis direction on the base member 102.

  The work holding device 120 includes a table 122 slidably provided on a pair of guide rails 116 provided on the base member 102, and a rotating member 124 provided on the table 122 while holding the work. It is comprised by.

  In the following description, rotation in which the rotatable range is set in a range smaller than 360 ° is referred to as “rotation”, and rotation in which the rotatable range is set to 360 ° or more is referred to as “rotation”. ".

The rotating member 124 includes a substantially circular frame body 128 in a frame of a substantially rectangular frame body 126.

  The frame 126 is rotated around the X axis by the motor 134, and the frame 128 is rotated around the Y axis by the motor 130.

  Further, in such a rotating member 124, the rod-like members 126-1 and 126-2 extend in parallel with the X axis so that the central axes thereof coincide with each other from the substantially central portions of the right member 126a and the left member 126b of the frame 126. It is installed.

  The rod-shaped member 126-1 is connected to the motor 134, and the rod-shaped member 126-2 is rotatably connected to a fixed member 136 that is fixedly disposed on the table 122.

Accordingly, the frame body 126 is configured to rotate around the X axis about the central axis O1 of the rod-like members 126-1 and 126-2 by driving the motor 134.

  Further, rod-like members 128-1 and 128-2 are extended in parallel with the Y axis so that the central axes coincide with each other from the substantially central portions of the rear end portion and the front end portion of the frame body 128.

  The rod-shaped member 128-1 passes through the rear member 126c of the frame body 126 and is connected to the motor 130, and the rod-shaped member 128-2 passes through the front member 126d of the frame body 126 and is rotatably connected to the front member 126d. ing.

Accordingly, the frame 128 is configured to rotate around the Y axis around the central axis O2 of the rod-shaped members 128-1 and 128-2 by driving the motor 130.

  For this reason, in the cutting device 100 provided with the workpiece holding device 120, cutting can be performed while adjusting the contact angle of the processing tool 132 with respect to the workpiece 200 within a predetermined range, and cutting of a complicated shape is possible.

The cutting device 100 includes a motor (not shown) that moves the carriage 112 in the X-axis direction, a motor (not shown) that moves the workpiece holding device 120 in the Y-axis direction, and the main shaft 114 in the Z-axis direction. The entire operation including the driving of the moving motor (not shown), the motor 130 and the motor 134 is controlled by a microcomputer (not shown).

  In the above configuration, when the cutting device 100 performs the cutting process on the workpiece 200, the operator attaches the processing tool 132 to the spindle 114 and holds the workpiece 200 on the frame 128 of the workpiece holding device 120. Then, cutting data is input to a microcomputer (not shown).

  Thereafter, in the cutting apparatus 100, when an operator instructs the start of the cutting process by an operation using an operator (not shown), the cutting apparatus 100 moves the table 122 in the Y-axis direction based on the input cutting data. At the same time, the carriage 112 is moved in the X-axis direction, and the main shaft 114 is moved in the Z-axis direction (see FIG. 2).

  As a result, the relative positional relationship between the workpiece 200 held by the frame 128 of the rotating member 124 and the machining tool 132 attached to the main shaft 114 changes three-dimensionally.

  Further, in the cutting apparatus 100, the frame body 126 is rotated around the X axis by the motor 134 based on the input cutting data, and the frame body 128 is rotated around the Y axis by the motor 130 (FIG. 2). To see.)

Thereby, in the processing apparatus 100, the processing tool 132 attached to the main shaft 114 can be brought into contact with the workpiece 200 held by the frame body 128 at a predetermined angle, and a complicated shape can be cut. .

  However, in such a work holding device 120, the work 200 is held in the frame 128, and the dimensions of the work 200 must be processed in accordance with the diameter of the frame 128 and the like, which increases the work process. However, it has been pointed out that the cutting work becomes complicated.

  As a means for solving such a problem, a technique of holding the work from one side, that is, a technique of holding the work by cantilevering, can be considered. In such a technique, the X axis and the Y axis as described above are used. No work holding device capable of rotating or rotating has been realized so far.

  Therefore, there has been a demand for a work holding device that can be rotated or rotated about two axes and that holds the work in a cantilever manner.

EP 2247405 Specification

  The present invention has been made in view of the above-mentioned demands of the prior art, and the object of the present invention is that it can be rotated or rotated around two axes and the workpiece can be cantilevered. An object of the present invention is to provide a work holding device for holding.

  To achieve the above object, the present invention provides a work holding device for holding a work to be cut by a processing tool, wherein one of a pair of side members parallel to each other is connected and the other is opened. A U-shaped frame body, and a pair of side members of the frame body, the support means disposed so as to be rotatable around the X axis of an XYZ orthogonal coordinate system, the support means, Rotating means that can be rotated around the X axis by the supporting means, and disposed so as to be rotatable around the Y axis in the rotating means, and the work is held by cantilever on the open side of the frame body A rotating means capable of rotating the work around the Y axis, a first driving means for rotating the supporting means, and a second driving means for rotating the rotating means. Control the above support means Is obtained as a control means for controlling the rotation angle and the rotation angle of the rotation means about the X axis.

  In the present invention, the support means is rotated by the first drive means via a first worm gear, and the rotation means is the second worm gear via a second worm gear. It is made to rotate with a drive means.

  Since the present invention is configured as described above, it has an excellent effect that it can be rotated or rotated around two axes and the work can be held by cantilever.

FIG. 1 is a schematic configuration perspective view of a cutting apparatus provided with a work holding device according to the prior art. FIG. 2 is a schematic configuration explanatory view showing a main part of a conventional work holding device. FIG. 3 is an explanatory diagram of a schematic configuration of the work holding device according to the present invention. 4 is a cross-sectional explanatory view taken along the line II of FIG.

  Hereinafter, an example of an embodiment of a work holding device according to the present invention will be described in detail with reference to the accompanying drawings.

In the following description, the same or equivalent components as those of the conventional work holding device described with reference to FIGS. 1 and 2 are indicated by the same reference numerals as those used above. The detailed configuration and description of the function and effect will be omitted as appropriate.

  FIG. 3 shows a schematic configuration explanatory view of the work holding device according to the present invention, and FIG. 4 shows a cross-sectional explanatory view taken along line II of FIG.

3 is fixed to the front surface 12a of the standing member 12 and the standing member 12 standing upright so that the front surface 12a is perpendicular to the upper surface 122a of the table 122 on the rear side of the table 122. The substantially U-shaped frame body 14 disposed in a row, the rotation member 16 rotatably supported by the frame body 14 and rotatably supporting a rotation member 18 (described later), and the rotation member 16 and a rotating member 18 provided with a workpiece fixing member 20 for fixing the workpiece 200 to the front surface 18a.

  More specifically, the frame body 14 is fixed to the front surface 12a of the standing member 12 and is extended at a fixing portion 14-1 extending in the X-axis direction and a left side end portion of the fixing member 14-1. The side member 14-2L extending from the front surface 12a of the installation member 12 substantially vertically to the front side is parallel to the side member 14-2L, and stands at the right side end of the fixing member 14-1. The side member 14-2R extended from the front surface 12a of the installation member 12 to the front side substantially perpendicularly is comprised.

  That is, the frame body 14 has a pair of side members, and when viewed from the upper side, the frame body 14 is fixed to the standing member 12 on the rear side and has a substantially U shape with the front side open.

  The frame body 14 is provided with a support member 22 that supports the rotating member 16 on the front side.

  The support member 22 is rotatably disposed so as to connect the side member 14-2L and the side member 14-2R.

  Here, in the frame 14, a motor 26 is provided on the left side surface 14-2La of the side member 14-2L, and a worm 24a that is rotated by the motor 26 is provided in the motor 26.

  In the support member 22, a worm wheel 24 b that meshes with the worm 24 a is provided in the vicinity of the left side end.

  For this reason, the support member 22 is configured to be rotatable by a worm gear 24 configured by a worm 24a and a worm wheel 24b.

  For example, when the worm 24a is rotated in a predetermined direction by the motor 26, the worm wheel 24b is rotated in the direction of arrow A, whereby the support member 22 is rotated in the direction of arrow B. Further, when the worm 24a is rotated in the direction opposite to the predetermined direction by the motor 26, the worm wheel 24b is rotated in the arrow C direction, whereby the support member 22 is rotated in the arrow D direction.

  Thus, the support member 22 can be rotated around the X axis about the central axis O <b> 3 by driving the motor 26. In addition, as a range of the angle which can rotate the support member 22, it is set to 25 degrees, for example.

  The driving of the motor 26 is controlled by a microcomputer (not shown).

In addition, as a specific structure for the support member 22 to be rotatably disposed on the side member 14-2L and the side member 14-2R, for example, the support member 22 is disposed laterally via a ball bearing. What is necessary is just to arrange | position to the member 14-2L and the side member 14-2R, and as such a structure, you may make it use another well-known technique suitably.

  Further, the rotating member 16 is fixedly disposed at a substantially central position of the support member 22 on the lower side. In the present embodiment, as shown in FIG. 3, the rotating member 16 is disposed at a substantially central position of the support member 22, but the rotating member 16 is arranged on one side member side. It may be arranged close to.

  Then, as the support member 22 rotates, the rotation member 16 rotates in the arrow C direction and the arrow D direction.

  That is, when the support member 22 rotates in the arrow B direction, the rotation member 16 rotates in the arrow E direction, and when the support member 22 rotates in the arrow D direction, the rotation member 16 rotates in the arrow F direction. Thus, the inclination angle of the rotation member 16 is determined in accordance with the rotation angle of the support member 22.

  That is, the rotation member 16 has an inclination angle changed according to the direction and angle of rotation of the support member 22, and the X axis about the central axis O <b> 3 is driven by the motor 26 driven by the support member 22. It will turn around.

  A rotating member 18 is rotatably disposed above the rotating member 16.

  The rotating member 16 is provided with a motor 28 on the rear surface 16 a, and the motor 28 is provided with a worm 30 a that is rotated by the motor 28. The worm 30a meshes with a worm wheel 30b (described later) provided on the rotating member 18.

The driving of the motor 28 is controlled by a microcomputer (not shown).

  A worm wheel 30b is provided on the rear surface 18b of the rotating member 18, and a work fixing member 20 is provided on the front surface 18a.

  Specifically, the rotating member 18 is formed in a substantially cylindrical shape whose central axis extends in the Y-axis direction.

  A rear surface 18b of the rotating member 18 is formed with a substantially cylindrical convex portion 18-1 having a central axis coinciding with the central axis O3 of the rotating member 18, and the worm wheel 30b is formed on the convex portion 18-1. The rotating member 18 is rotated through the convex portion with the rotation of the worm wheel 30b.

  Further, on the front surface 18 b of the rotating member 18, a substantially columnar workpiece fixing member 20 is provided that has a central axis that coincides with the central axis O3 of the rotating member 18. The workpiece fixing member 20 has a shape that holds the workpiece 200, and the workpiece 200 held by the workpiece holding member 20 rotates as the rotating member 18 rotates.

  For example, when the worm 30 a by the motor 28 rotates in the direction of arrow H, the worm wheel 30 b rotates in the direction of arrow I, whereby the workpiece 200 rotates in the direction of arrow J via the rotating member 18. Further, when the worm 30a is rotated in the arrow K direction by the motor 28, the worm wheel 30b is rotated in the arrow L direction, whereby the workpiece 200 is rotated in the arrow M direction via the rotating member 18.

  That is, the rotating member 18 rotates around the Y axis around the central axis O4 by driving the motor 28, and thereby the workpiece 200 held by the workpiece holding member 20 provided on the front surface 18a of the rotating member 18. Will rotate around the Y axis about the central axis O4. The range of the rotatable angle of the rotating member 18 is, for example, 360 °.

  As a configuration for rotatably supporting the rotating member 18 by the rotating member 16, for example, the rotating member 18 may be supported by the rotating member 16 via a ball bearing. Other known techniques may be used.

Moreover, the front-end | tip of the workpiece | work holding member 20 becomes a set screw, for example, You may make it use the other well-known technique suitably as such a structure.

  In the above configuration, when a cutting process is performed in the cutting apparatus provided with the work holding device 10, the operator attaches the processing tool 132 to the spindle 114 and holds the work 200 on the work holding member 20 of the work holding device 10. The cutting data is input to a microcomputer (not shown).

  Thereafter, in the cutting device, when the operator instructs the start of the cutting process by an operation not shown, the cutting device moves the table 112 in the Y-axis direction based on the input cutting data. The carriage 112 is moved in the X-axis direction, and the main shaft 114 is moved in the Z-axis direction.

  As a result, the relative positional relationship between the workpiece 200 held by the workpiece holding member 20 and the processing tool 132 attached to the spindle changes three-dimensionally.

  In the cutting apparatus, based on the input cutting data, the rotating member 16 is rotated around the Y axis by the motor 26 and the rotating member 18 is rotated around the Y axis by the motor 28.

Thereby, in the cutting device provided with the workpiece holding device 10, the machining tool 132 attached to the main spindle 114 is brought into contact with the workpiece 200 held by the workpiece holding member 10 at an arbitrary angle at an arbitrary position. It is something that can be done.

  The workpiece holding device 10 according to the present invention fixes the workpiece 200 only from one side by the workpiece holding member 20 provided on the rotating member 18 (that is, holds the workpiece 200 by cantilever). In addition, the rotating member 18 that can rotate about the Y axis is rotatably supported by the rotating member 16 that can rotate about the X axis.

  Thereby, in the workpiece holding device 10 according to the present invention, the workpiece can be rotated or rotated about two axes, and the workpiece can be held in a cantilever manner.

  Further, the holding device 10 according to the present invention realizes the rotation of the support member 22 and the rotation of the rotation member 18 by worm gears.

For this reason, in the workpiece holding device 10 according to the present invention, no matter what load is applied to the workpiece 200, the support member 22 and the rotating member 18 are not rotated or rotated by the load.

  The embodiment described above may be modified as shown in the following (1) to (5).

  (1) In the above-described embodiment, in the work holding device 10, the motor 26 and the worm gear 24 are provided on the left side of the side member 14-2L in the frame body 14, but the present invention is not limited to this. Of course, the motor 26 and the worm gear 24 may be provided on the right side of the side member 14-2L.

  By providing the motor 26 and the worm gear 24 on the right side of the side member 14-2L, there are no constituent members outside the frame body 14, and the work holding device can be downsized.

  (2) In the above-described embodiment, the fixing member 14-1 of the frame body 14 is fixedly disposed on the front surface 12a of the standing member 12 erected on the upper surface of the table 122, and the fixing member 14-1 The side member 14-2L is disposed on the left side of the fixing member 14-1, and the side member 14-2R is disposed on the right side of the fixing member 14-1. However, the present invention is not limited to this. Of course not.

  That is, the fixing member 14-1 may be deleted, and the side member 14-2L and the side member 14-2R may be directly formed on the standing member 12.

  Thereby, size reduction and weight reduction of a workpiece holding device can be promoted.

  (3) In the above-described embodiment, the table 122 on which the workpiece holding member 10 that holds the workpiece is moved moves in the Y-axis direction, and the machining tool 132 is moved in the X-axis direction and Z through the carriage 112 and the main shaft 114. Although it is configured to move in the axial direction, the cutting device on which the workpiece holding member 10 is mounted is not limited to this.

  That is, as a cutting device on which the workpiece holding device 10 is mounted, the table 122 on which the workpiece holding device 10 is installed is fixed, and the processing tool 132 is moved in the X axis direction, the Y axis direction, and the Z axis direction. Also good. Further, the table 122 on which the workpiece holding device 10 is installed may be moved in the X-axis direction and the Y-axis direction, and the processing tool 132 may be moved in the Z-axis direction. In short, as a cutting device on which the workpiece holding device 10 is mounted, any cutting device may be used as long as the positional relationship between the workpiece 200 held by the workpiece holding device 10 and the processing tool 132 changes three-dimensionally. It may be.

  (4) Although not particularly described in the above-described embodiment, the processing device on which the work holding device 10 is mounted may be a processing device that cuts dental ceramics into a desired shape, for example. .

  (5) You may make it combine suitably the embodiment shown above and the modification shown in said (1) thru | or (4).

  The present invention is suitable for use when holding a workpiece in a cutting device or the like.

  10, 120 Work holding device, 12 Standing member, 14 Frame, 16 Rotating member, 18 Rotating member, 20 Work holding member, 22 Support member, 24, 30 Worm gear, 26, 28 Motor

Claims (3)

In a work holding device that holds a work to be cut by a processing tool,
A substantially U-shaped frame body in which one of a pair of side members parallel to each other is connected and the other is opened;
In the pair of side members of the frame, support means arranged to be rotatable around the X axis of an XYZ orthogonal coordinate system;
A rotation means disposed on the support means and rotatable about the X axis by the support means;
The rotating means is disposed so as to be rotatable around the Y axis, and further includes a work holding means for holding the work by cantilever on the open side of the frame, and the work can be rotated around the Y axis. Rotating means,
The first drive means for rotating the support means and the second drive means for rotating the rotation means are controlled so that the rotation angle around the X axis of the support means and the rotation means And a control means for controlling the rotation angle. The work holding apparatus according to claim 1,
The support means is rotated by the first drive means via a first worm gear,
The work holding device, wherein the rotating means is rotated by the second driving means via a second worm gear. In a work holding device in a processing device for processing dental ceramics,
A work holding means for holding a ceramic work piece by cantilever is provided.
A work holding device comprising: a rotating means rotatable around an X axis of an XYZ orthogonal coordinate system; and a rotating means rotatable around a Y axis.

Images