JP2009006444A - Workpiece fixing method and workpiece fixing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a workpiece fixing method on a machine tool capable of regulating a position of a workpiece without manual operation and a workpiece fixing device. <P>SOLUTION: This workpiece fixing device to position and fix the workpiece W by using a positioning mechanism 12 to position the workpiece W on a horizontal surface and a pressurizing and fixing mechanism 13 to pressurize and fix the workpiece W positions the workpiece in the horizontal direction of the workpiece W by the positioning mechanism 12 and pressurizes and fixes the workpiece W. At this time, the pressurizing and positioning mechanism 12 is set in a strong energizing state. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a workpiece fixing method and a workpiece fixing device. More specifically, the present invention relates to a workpiece fixing method and a workpiece fixing device for fixing a workpiece by pressing the workpiece from above.

  2. Description of the Related Art Conventionally, in a machine tool, a work is fixed in order to prevent the work from being displaced during processing. In general, the clamping is performed by clamping a clamp member having a V-shaped workpiece gripping portion and advancing them (for example, Patent Document 1). reference).

  In fixing using such a clamp member, every time the machining position of the workpiece is changed, the clamp member is retracted to release the clamp, and the workpiece position is adjusted.

However, since the position adjustment of the work is performed manually, there is a problem that workability and productivity are poor.
JP-A-6-114615

  The present invention has been made in view of the problems of the prior art, and an object of the present invention is to provide a workpiece fixing method and a workpiece fixing device in a machine tool that can adjust the position of the workpiece without manual intervention.

  The workpiece fixing method of the present invention is a workpiece fixing method that fixes a workpiece using a positioning mechanism that positions the workpiece in a horizontal plane and a pressing / fixing mechanism that presses and fixes the workpiece. A positioning procedure for positioning in a direction, and a pressing / fixing procedure for pressing / fixing a workpiece positioned by the procedure by the pressing / fixing mechanism, wherein the positioning mechanism is in a strongly biased state in the positioning procedure Features.

  In the work fixing method of the present invention, it is preferable that a work rotation procedure for rotating the work by the turntable by a predetermined angle is added, and in the work rotation procedure, the pressing / fixing mechanism is set to a turntable rotatable pressure.

  Moreover, in the workpiece fixing method of the present invention, it is preferable that a procedure for using the pressing / fixing mechanism as a pressing / fixing pressure is added after the workpiece rotation procedure is completed.

  Furthermore, in the work fixing method of the present invention, it is preferable that a procedure for setting the positioning mechanism in a weakly biased state is added.

  Furthermore, in the workpiece fixing method of the present invention, it is preferable that a procedure for changing the positioning mechanism from the weakly biased state to the strongly biased state when the workpiece is processed is added.

  Therefore, the workpiece fixing method is applied to a workpiece machining method.

  The workpiece fixing device of the present invention is a workpiece fixing device comprising a turntable for placing and rotating a workpiece, a positioning mechanism for positioning the workpiece on a horizontal plane, and a pressing / fixing mechanism for pressing and fixing the workpiece. The pressing / fixing mechanism includes a swing boom that can swing between a pressing / fixing position and a retracted position, and a hydraulic cylinder disposed on the swing boom. It is characterized by.

  In the workpiece fixing device of the present invention, it is preferable that the hydraulic cylinder includes a main hydraulic cylinder and an auxiliary hydraulic cylinder.

  Moreover, in the workpiece fixing device of the present invention, it is preferable that the pressure of the main hydraulic cylinder can be adjusted to a pressing / fixing pressure and a turntable rotatable pressure.

  Furthermore, in the workpiece fixing device of the present invention, the positioning mechanism includes a first positioning member that is movable forward and backward with respect to the workpiece, and a second positioning member that is movable in a direction orthogonal to the first positioning member. preferable.

  Furthermore, in the workpiece fixing device of the present invention, it is preferable that the first positioning member can be adjusted between a strong biasing state and a weak biasing state.

  Therefore, the workpiece fixing device of the present invention is applied to a machine tool.

  According to the present invention, it is possible to obtain an excellent effect that the work is positioned and fixed automatically and the work efficiency and productivity are improved.

  According to the preferred embodiment of the present invention, the machining surface can be automatically changed without causing a positional shift in the workpiece, so that an excellent effect of further improving work efficiency and productivity can be obtained.

  Hereinafter, although the present invention is explained based on an embodiment, referring to an accompanying drawing, the present invention is not limited only to this embodiment.

  FIG. 1 is a schematic block diagram showing a hole drilling system S including a workpiece fixing device 10 to which a workpiece fixing method according to an embodiment of the present invention is applied. FIG. A control block diagram is shown.

  In addition to the workpiece fixing device 10, the hole machining system S includes a hole machining device 20 and a control device 30 that controls the workpiece fixing device 10 and the hole machining device 20.

  As shown in FIGS. 2 and 3, the hole drilling device 20 is a horizontal drilling machine that is movable in two axial directions in the XY directions, and includes a horizontally disposed electric drill 21 and an electric drill 21. A drill moving unit 22 that moves in two axial directions in the XY direction is provided. The electric drill 21 is disposed in the X-axis direction.

  As shown in FIGS. 2 and 3, the work fixing device 10 is disposed to face the hole processing device 20, and as shown in FIGS. 2 and 3, the turntable 11 on which the work W is positioned and placed and fixed, and the work placed on the turntable 11. The positioning mechanism 12 for positioning W and the pressing / fixing mechanism 13 for pressing and fixing the positioned workpiece W are provided.

  The turntable 11 can be a known one, and the configuration is not particularly limited. Note that the workpiece W may be directly placed on the turntable 11, but as shown in FIG. 2, the workpiece table 11a may be provided on the turntable 11 so as to be placed thereon.

  The positioning mechanism 12 is for positioning the workpiece W placed on the turntable (the workpiece placement table 11a when the workpiece placement table 11a is provided) in the XY direction, as shown in FIG. The X-axis direction positioning member 60 that can be moved forward and backward in the X-axis direction, that is, toward the electric drill 21, and positioned in the X-axis direction, and attached to the X-axis direction positioning member 60 and can traverse in the Y-axis direction. And a Y-axis direction positioning member 70 for positioning in the Y-axis direction.

  As shown in FIG. 4, the X-axis direction positioning member 60 has a rectangular parallelepiped main body 61 and a required number (three in the illustrated example) of the main body 61 projecting from the facing surface of the hole machining apparatus 20. It includes a part 62 and an advancing / retracting drive part 63 that moves the main body 61 forward and backward with respect to the hole drilling device 20, more specifically, the workpiece W and causes the positioning part 62 to position in the X-axis direction.

  The main body 61 has sufficient rigidity to resist the urging force applied during processing from the hole processing apparatus 20.

  The reason why the positioning portion 62 is configured as described above is to improve the positioning accuracy by improving the processing accuracy.

  The advancing / retreating drive unit 63 can be any of various known drive mechanisms. For example, the advance / retreat drive unit 63 may be a combination of a ball screw mechanism 64 and linear guides 65 and 65 arranged so as to sandwich the turntable 11 on both sides thereof. Yes (see FIG. 4).

  As shown in FIG. 5, the Y-axis direction positioning member 70 has a rectangular parallelepiped main body 71, a support portion 72 that supports the main body 71, and a base end 72 a of the support portion 72 that is the main body of the X-axis direction positioning member 60. A traversing drive unit 73 that allows the main body 71 to perform positioning in the Y-axis direction and that holds the upper surface 61 in a traversable manner is included.

  The transverse drive unit 73 can be various known drive mechanisms, for example, a ball screw mechanism 74 and linear guides 75 and 75 arranged so as to sandwich the ball screw mechanism 74 on the upper surface of the main body 61 of the X-axis direction positioning member 60. (See FIG. 5).

  The linear guides 75 on the drilling device 20 side are arranged in two rows to improve the rigidity.

  As shown in FIG. 6, the pressing / fixing mechanism 13 includes a swing boom 15 that is rotatable between a press / fixed position and a retracted position, and a turntable at an appropriate position of the swing boom 15, for example, a press / fixed position. 11, a main hydraulic cylinder 16 disposed at a position corresponding to the center of the main hydraulic cylinder 11, and auxiliary hydraulic cylinders 17 and 17 disposed on both sides of the main hydraulic cylinder 16.

  As the turning mechanism 80 for turning the turning boom 15, for example, as shown in FIG. The motor-driven pin-on shaft 82 can be combined with a rack (not shown clearly) 83 that meshes with the pin-on shaft 82. Although not shown, the rack 83 covers at least the pressing / fixing position and the retracted position.

  As shown in FIG. 3, the control device 30 includes a drilling device control block 40 that controls the drilling device 20 and a workpiece fixing device control block 50 that controls the workpiece fixing device 10 as main parts. Is done.

  The drilling device control block 40 includes an electric drill control unit 41 that controls the electric drill 21 and a drill movement unit control unit 42 that controls the drill movement unit 22.

  The work fixing device control block 50 includes a turntable control unit 51 that controls the turntable 11, a positioning mechanism control unit 52 that controls the positioning mechanism 12, and a pressing / fixing mechanism control unit 53 that controls the pressing / fixing mechanism 13. It is supposed to include.

  Note that the work fixing device control block 50 including the control units 51, 52, and 53 is realized by storing a program corresponding to each operation described later in a computer, for example.

  Next, the operation in the hole machining system S including the workpiece fixing device 10 having such a configuration will be described focusing on workpiece fixation.

  Procedure 1: The work W is placed on the turntable (work placement table 11a when the work placement table 11a is provided) 11.

  Procedure 2: Under the control of the positioning mechanism control unit 52 of the control device 30, the X-axis direction positioning member 60 of the positioning mechanism 12 is advanced, and the workpiece W is positioned in the X-axis direction. In this specification, the biasing state of the X-axis direction positioning member 60 at this time is defined as a “strong biasing state”.

  Procedure 3: Under the control of the positioning mechanism control unit 52 of the control device 30, the Y-axis direction positioning member 70 of the positioning mechanism is traversed (advanced), and the workpiece W is positioned in the Y-axis direction. In this specification, the urging state of the Y-axis direction positioning member 70 at this time is defined as a “strong urging state”. The procedure 3 may be performed simultaneously with the procedure 2.

  Procedure 4: The turning boom 15 is turned by the control of the pressing / fixing mechanism control unit 53 of the control device 30 and positioned from the retracted position to the pressing / fixing position.

  Procedure 5: The main hydraulic cylinder 16 and the auxiliary hydraulic cylinder 17 are driven by the control of the pressing / fixing mechanism control unit 53 of the control device 30 to press and fix the workpiece W. In this specification, the pressure at this time is defined as “pressing / fixing pressure”. When the workpiece W is not larger than the predetermined size, only the main hydraulic cylinder 16 is driven.

  Thereby, the fixing of the workpiece W is completed, and then predetermined processing is performed by the hole processing device 20 on the surface of the workpiece W on the hole processing device 20 side.

  By the way, depending on the workpiece W, not only processing on one side but also processing on the other side may be required. Therefore, it is necessary to change the machining surface of the workpiece W by rotating the turntable 11. Next, the procedure for that will be described.

  Procedure 11: Under the control of the positioning mechanism control unit 52 of the control device 30, the X-axis direction positioning member 60 of the positioning mechanism 12 is retracted, and the Y-axis direction positioning member 70 is traversed (retracted) to return to the initial position. To do.

  Procedure 12: Under the control of the pressing / fixing mechanism control unit 53 of the control device 30, the auxiliary hydraulic cylinder 17 is set to the initial position, and the pressing / fixing by the auxiliary hydraulic cylinder 17 is released. Note that this procedure is omitted when the work size is small and the auxiliary hydraulic cylinder 17 is not pressed and fixed.

  Procedure 13: The pressure of the main hydraulic cylinder 16 is reduced to such an extent that the turntable 11 can rotate under the control of the pressing / fixing mechanism control unit 53 of the control device 30. For example, the pressure is reduced to about 30% of the pressing / fixing pressure. In this specification, the pressure at this time is defined as “turntable rotation pressure”.

  Procedure 14: The turntable 11 is rotated by a predetermined angle under the control of the turntable control unit 51 of the control device 30. In addition, the rod of the main hydraulic cylinder 16 rotates together with the rotation of the work W by the rotation of the turntable 11.

  Step 15: The pressure of the main hydraulic cylinder 16 is increased to the pressing / fixing pressure by the control of the pressing / fixing mechanism control unit 53 of the control device 30.

  Procedure 16: Under the control of the pressing / fixing mechanism control unit 53 of the control device 30, the auxiliary hydraulic cylinder 17 is boosted to a pressing / fixing pressure. Note that this procedure is omitted when the work size is small and the auxiliary hydraulic cylinder 17 is not pressed and fixed.

  Procedure 17: The X-axis direction positioning member 60 of the positioning mechanism 12 is advanced and brought into contact with the workpiece W under the control of the positioning mechanism control unit 52 of the control device 30. In this case, if the X-axis direction positioning member 60 is strongly brought into contact with the workpiece W, there is a possibility that the workpiece W is displaced. In this specification, the biasing state of the X-axis direction positioning member 60 at this time is defined as a “weak biasing state”.

  Procedure 18: The Y-axis direction positioning member 70 of the positioning mechanism 12 is driven and brought into contact with the workpiece W under the control of the positioning mechanism control unit 52 of the control device 30. In this case, as described above, if the Y-axis direction positioning member 70 is brought into strong contact with the workpiece W, the workpiece W may be displaced. Therefore, the biasing force is adjusted to the extent that the workpiece W is lightly contacted. In this specification, the biasing state of the Y-axis direction positioning member 70 at this time is defined as a “weak biasing state”. The procedure 18 may be performed simultaneously with the procedure 17.

  Thereby, the change of the processed surface of the workpiece W is completed, and then the changed surface is processed. In this case, when the hole processing by the hole processing device 20 is started so that the workpiece W is not displaced due to the urging force of the hole processing by the hole processing device 20, the control of the positioning mechanism control unit 52 of the control device 30 The X-axis direction positioning member 60 is in a strong biased state. That is, the work position is held by the pressing / fixing mechanism 13 and the X-axis direction positioning member 60.

  As described above, according to the present embodiment, just by placing the workpiece W on the turntable 11 or the like, not only the positioning, pressing and fixing are performed, but also the machining surface is automatically changed. Workability and productivity are improved.

  As mentioned above, although this invention has been demonstrated based on embodiment, this invention is not limited only to this embodiment, A various change is possible. For example, in the embodiment, the hole processing apparatus 20 is described as an example of the processing apparatus. However, the application of the present invention is not limited to the hole processing apparatus 20, but can be applied to various processing apparatuses. Applicable. In the case of the cutting device, the Y-axis direction positioning member 70 is also in a strong biased state.

  The present invention can be applied to machine tools.

It is a schematic block diagram of the hole drilling system containing the workpiece | work fixing apparatus of this invention. It is the schematic of the hole drilling apparatus and workpiece | work fixing apparatus of the system, Comprising: (a) shows a top view, (b) shows a front view. It is a control block diagram of the system. It is the schematic of the X-axis direction position member of the positioning mechanism of the workpiece fixing device, wherein (a) shows a plan view and (b) shows a front view. It is the schematic of the Y-axis direction position member of the positioning mechanism of the workpiece fixing device, wherein (a) shows a plan view and (b) shows a front view. It is the schematic of the press and fixing mechanism of the work fixing device, wherein (a) shows a plan view and (b) shows a front view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Work fixing device 11 Turntable 12 Positioning mechanism 13 Pressing / fixing mechanism 20 Hole processing device 21 Electric drill 22 Drill moving unit 30 Control device 40 Hole processing control block 50 Work fixing device control block 51 Turntable control unit 52 Positioning mechanism control 53 A pressing / fixing mechanism control unit 60 X-axis direction positioning member 61 Main body 62 Positioning unit 63 Advancing / retreating driving unit 70 Y-axis direction positioning member 71 Main body 72 Support unit 73 Traverse driving unit 80 Turning mechanism 81 Turning post 81 Pinion shaft 83 Rack S Hole machining system W Workpiece

Claims (12)

A workpiece fixing method for fixing a workpiece using a positioning mechanism for positioning the workpiece in a horizontal plane and a pressing / fixing mechanism for pressing / fixing the workpiece,
A positioning procedure for positioning the workpiece in the horizontal direction by the positioning mechanism;
A pressing / fixing procedure for pressing / fixing the workpiece positioned by the above procedure by the pressing / fixing mechanism,
In the positioning procedure, the workpiece fixing method is characterized in that the positioning mechanism is in a strongly biased state. A work rotation procedure for rotating the work by the turntable by a predetermined angle is added,
2. The work fixing method according to claim 1, wherein, in the work rotation procedure, the pressing / fixing mechanism is a turntable rotatable pressure.   The work fixing method according to claim 2, further comprising a step of setting the pressing / fixing mechanism to a pressing / fixing pressure after the work rotation procedure is completed.   The work fixing method according to claim 3, further comprising a step of placing the positioning mechanism in a weakly biased state.   5. The work fixing method according to claim 4, wherein a procedure for changing the positioning mechanism from a weakly biased state to a strongly biased state is added during processing of the workpiece.   A workpiece machining method using the workpiece fixing method according to claim 1. A work fixing device comprising: a turntable for placing and rotating a work; a positioning mechanism for positioning the work in a horizontal plane; and a pressing / fixing mechanism for pressing and fixing the work,
The pressing / fixing mechanism includes a swing boom that can swing between a pressing / fixing position and a retracted position, and a hydraulic cylinder disposed on the swing boom. Work fixing device.   8. The workpiece fixing device according to claim 7, wherein the hydraulic cylinder includes a main hydraulic cylinder and an auxiliary hydraulic cylinder.   9. The work fixing device according to claim 8, wherein the pressure of the main hydraulic cylinder is adjustable to a pressing / fixing pressure and a turntable rotating pressure.   8. The workpiece fixing apparatus according to claim 7, wherein the positioning mechanism includes a first positioning member that is movable forward and backward with respect to the workpiece, and a second positioning member that is movable in a direction orthogonal to the first positioning member. .   The work fixing device according to claim 10, wherein the first positioning member is adjustable between a strong biasing state and a weak biasing state.   A machine tool comprising the workpiece fixing device according to any one of claims 7 to 11.

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