JP4338286B2 - Transfer type cutting machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transfer type cutting machine for sequentially moving a pallet on which a workpiece is placed to a plurality of processing machines.
[0002]
[Prior art]
2. Description of the Related Art A transfer-type cutting machine that transfers a pallet on which a workpiece is placed to a processing machine for processing a plurality of types of cutting has been conventionally known. An example of a conventional transfer type cutting machine is shown in FIG. The transfer type cutting machine includes a first processing machine 10a and a second processing machine 10b that perform different cutting processes. A pallet fixing jig 12 and positioning pins 14 are provided on the upper surfaces of the first processing machine 10a and the second processing machine 10b. A workpiece (not shown) for processing is placed on the pallet 16 and fixed on the pallet 16 by a fixing device (not shown).
The pallet 16 to which the workpiece is fixed is placed on a pallet fixing jig 12 as a reference surface provided in the first processing machine 10a, and the position of the pallet 16 is prevented from shifting in the horizontal direction by the positioning pins 14. And the pallet 16 is fixed to the 1st processing machine 10a with the clamp apparatus 18, and a predetermined process is performed to a workpiece | work with the 1st processing machine 10a after that.
[0003]
After the processing of the workpiece by the first processing machine 10a is completed, the pallet 16 is detached from the first processing machine 10a by operating the clamp device 18, and the pallet 16 is removed from the first processing machine using a lifting / lowering transfer means (not shown). 10a is lifted vertically above the second processing machine 10b, and then the pallet 16 is moved laterally above the second processing machine 10b, and then the pallet 16 is lowered onto the pallet fixing jig 12 of the second processing machine 10b. The pallet 16 is loaded. When the pallet 16 is placed on the pallet fixing jig 12 of the second processing machine 10b, the positioning pins 14 prevent the position of the pallet 16 from shifting in the horizontal direction. Thereafter, the pallet 16 is fixed to the second processing machine 10b by the clamping device 18, and the workpiece is processed by the second processing machine 10b.
[0004]
[Problems to be solved by the invention]
In the conventional transfer type cutting machine, when the pallet 16 moves from the first processing machine 10a to the second processing machine 10b, the pallet 16 moves away from the pallet fixing jig 12 as a reference surface. For this reason, there is a possibility that chips or the like may enter between the lower surface of the pallet 16 and the upper surface of the pallet fixing jig 12 as a reference surface. There was a problem that the position of the machine shifted and the machining accuracy deteriorated.
[0005]
The present invention has been made in view of the above-mentioned problems. By omitting a conventionally required lifting device, the transfer time is shortened and the cost is reduced, and a chip or the like is caught between the reference surface and the pallet. It is an object of the present invention to provide a transfer type cutting machine that eliminates the fear and prevents the deterioration of machining accuracy.
[0006]
[Means for Solving the Problems]
A transfer-type cutting machine according to the present invention is a transfer-type cutting machine for processing a workpiece placed on a pallet with a plurality of processing machines, for transferring the pallet, and extending over the plurality of processing machines. A first rail to be laid, a holding device for holding each pallet for holding or releasing the pallet, and a holding device for holding each pallet. Is composed of a feeding device for moving in parallel with the first rail.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, the present invention will be described with reference to the drawings.
FIG. 1 is a plan view showing an embodiment of a transfer type cutting machine according to the present invention, and FIG. 2 is a sectional view of FIG. 1, showing a state where a pallet is not held by the machine. 1 and 2, the same reference numerals as those in FIG. 5 denote the same members.
The transfer type cutting machine of the present invention lays two first rails 20 across the upper surface of the first processing machine 10a and the upper surface of the second processing machine 10b. A rail guide 22 that engages with the first rail 20 is provided on the lower surface of the pallet 16. Thereby, the pallet 16 can be easily moved horizontally along the first rail 20 and in one axial direction from the first processing machine 10a to the second processing machine 10b. Although a transfer device that moves horizontally along the first rail 20 of the pallet 16 and moves in one axial direction is not shown, the transfer device has a structure compared to a conventional transfer device with an elevating device that raises and lowers the pallet 16. Can be simple and inexpensive.
[0008]
A groove 24 that penetrates in the direction along the first rail 20 is formed at the center of the lower surface of the pallet 16. On the lower surface of the pallet 16, a first plate member 28 as a held member provided with a positioning fitting hole 26 as a first fitting means, and a second member as a held member having the same thickness as the first plate member. The plate 30 is fixed. The first plate member 28 and the second plate member 30 as the members to be held may be formed integrally with the pallet 16. The first plate member 28 and the second plate member 30 are arranged so as to hide a part of the groove 24 when the groove 24 is viewed from the lower side of the pallet 16. A gap space 32 is formed between the first plate member 28 and the second plate member 30, and the gap space 32 communicates with the groove 24.
[0009]
A concave portion 34a and a concave portion 34b are formed inside the upper surfaces of the first processing machine 10a and the second processing machine 10b, and the holding device for holding the pallet 16 and releasing the holding in the concave portion 34a and the concave portion 34b. 36 is provided. The holding device 36 has a base portion 38, and a rail guide 40 is fixed to the lower surface of the base portion 38. A second rail 42 parallel to the first rail 20 is provided in the recess 34a of the first processing machine 10a and the recess 34b of the second processing machine 10b, and the second rail 42 and the rail guide 40 are engaged. . Thereby, the base 38 of the holding device 36 is movable in the direction along the second rail 42 (first rail 20). The second rail 42 is provided for each processing machine 10.
[0010]
As shown in FIGS. 2 and 3, a nut 44 is fixed to the lower surface of the base portion 38 at a position opposite to the position of the rail guide 40, and a ball screw 46 is screwed to the nut 44. The ball screw 46 is disposed so that its axial direction is parallel to the second rail 42. The ball screw 46 is supported at both ends by bearings 48 so as to rotate about the axis but not move in the axial direction. One end of the ball screw 46 is connected to a servo motor 50 as a rotational drive means. When the servo motor 50 is driven, the ball screw 46 is rotated so that the base 38 of the holding device 36 can freely move in the direction along the second rail 42.
[0011]
By driving the servo motor 50, the holding device 36 that holds the pallet 16 connected is moved along the first rail 20 (second rail 42). The holding device 36 is set so that the pallet 16 can be arbitrarily moved to a position where it can be easily processed in each processing machine 10. The nut 44, the ball screw 46, and the servo motor 50 form a moving unit, and the moving unit and the second rail 42 form a feeding device. However, the moving means is not limited to the above-described configuration as long as it can arbitrarily move the holding device 36 to a position where each holding machine 36 can be easily processed.
[0012]
The holding device 36 includes a movable member 52 that is movable in the vertical direction with respect to the base portion 38. The movable member 52 is provided with driving means 58 including, for example, a cylinder member 54 and a cylinder rod 56. The cylinder member 54 of the driving means 58 is fixed to the lower side of the movable member 52, the cylinder rod 56 extends above the movable member 52, and the upper clamping member 60 as the vertical clamping means is fixed to the tip of the cylinder rod 56. The A part of the movable member 52 passes through the base portion 38 and extends to the lower side thereof, and a fixed plate 59 is fixed to the lower end thereof, and a spring 61 is mounted between the fixed plate 59 and the base portion 38. The spring 61 urges the drive unit 58 to always move downward with respect to the base portion 38.
[0013]
In a state where the pallet 16 has moved on the holding device 36 along the first rail 20, the upper clamping member 60 is set to engage with the groove 24 formed in the pallet 16. Further, the cylinder rod 56 is set so as to be positioned in the gap space 32 between the first member 28 and the second member 30 (FIG. 2).
A lower first clamping member 62 as upper and lower clamping means and a lower second clamping member 64 as upper and lower clamping means are fixed to the upper surface of the movable member 52, and the pallet 16 is placed on the holding device 36 along the first rail 20. The lower first clamping member 62 is disposed at a position facing the first plate member 28, and the lower second clamping member 64 is disposed at a position facing the second plate member 30. The lower first clamping member 62 is fixed with a positioning pin 66 as second fitting means that protrudes upward from the lower first clamping member 62.
[0014]
When the pallet 16 moves along the first rail 20 onto the holding device 36 of the first processing machine 10a (10b), the upper clamping member 60 is engaged with the groove 24 of the pallet 16, and the cylinder rod 56 is It is located in the gap space 32 between the one member 28 and the second member 30 (FIG. 2). In this state, the upper clamping member 60 is not in contact with the first plate member 28 or the second plate member 30 fixed to the pallet 16. Thereafter, the driving means 58 is driven so that the cylinder rod 56 is accommodated in the cylinder member 54. Thereby, first, the upper clamping member 60 is lowered, and the upper clamping member 60 comes into contact with the first plate member 28 and the second plate member 30 fixed to the pallet 16. Thereafter, the movable member 52 and the cylinder member 54 rise against the spring 61, the lower first clamping member 62 contacts the first plate member 28, and the lower second clamping member 64 contacts the second plate member 30. At that time, the positioning pin 66 fixed to the lower first clamping member 62 is fitted into the positioning fitting hole 26 formed in the first plate member 28 (FIG. 4).
[0015]
As a result, the first plate 28 and the second plate 30 fixed to the pallet 16 are clamped in the vertical direction by the upper clamping member 60, the lower first clamping member 62, and the lower second clamping member 64 of the holding device 36. The pallet 16 is held without applying a load to the rail 20 or the rail guide 22. Further, since the positioning pin 66 fixed to the lower first clamping member 62 of the holding device 36 is fitted into the positioning fitting hole 26 formed in the first plate member 28 of the pallet 16, the pallet 16 and the holding device 36 move. It will be in the state which does not shift | deviate to a direction (a moving direction is a direction perpendicular | vertical to a paper surface). That is, the pallet 16 is firmly connected to and held by the holding device 36. Thereafter, the servomotor 50 is driven to move the pallet 16 to the most suitable position for processing in each of the processing machines 10a and 10b.
[0016]
After the processing by the first processing machine 10a and the second processing machine 10b is completed, the driving means 58 is driven so that the cylinder rod 56 protrudes from the inside of the cylinder member 54 to the outside. As a result, the movable member 52 and the cylinder member 54 are lowered by the spring 61, the lower first clamping member 62 is separated from the first plate member 28, and the lower second clamping member 64 is separated from the second plate member 30, so that the lower first clamping member is removed. The positioning pin 66 fixed to the member 62 is separated from the positioning fitting hole 26 formed in the first plate member 28. When the movable member 52 descends and comes into contact with the base 38, the descending of the movable member 52 and the cylinder member 54 stops. Thereafter, when the driving means 58 is further driven, the upper clamping member 60 is raised and the upper clamping member 60 is separated from the first plate member 28 and the second plate member 30. When the upper clamping member 60 is separated from the first plate member 28 and the second plate member 30 by a predetermined distance, the drive of the driving means 58 is stopped (state shown in FIG. 2). In the state of FIG. 2, the pallet 16 can freely move along the first rail 20.
[0017]
In the above embodiment, the number of processing machines is two, the first processing machine 10a and the second processing machine 10b. However, the number of the processing machines is three or more, and the first rail 20 is laid on these processing machines. It doesn't matter. Further, although the number of the first rails 20 is two, other numbers may be used. Furthermore, although the number of the second rails 42 is one, it may be more than that.
[0018]
【The invention's effect】
As described above, according to the transfer type cutting machine according to the present invention, the pallet can be moved horizontally along the rail in one axial direction between the plurality of processing machines. As a result, the conventional pallet can be kept away from the reference plane of the processing machine, and chips and the like are not caught between the pallet and its support member, resulting in poor processing accuracy. Thus, it is possible to prevent the conventional problem. Also, since the pallet can be moved horizontally along the rail from one processing machine to the next, it is simpler than conventional transfer devices with lifting devices that raise and lower the pallet. The size can be reduced, and the cost can be greatly reduced.
[Brief description of the drawings]
FIG. 1 is a plan view showing an embodiment of a transfer type cutting machine according to the present invention.
FIG. 2 is a cross-sectional view showing an embodiment of a transfer type cutting machine according to the present invention, and shows a state in which a pallet is not connected to and held by the processing machine.
FIG. 3 is a plan view of an essential part of a base feeding device used in the present invention.
4 is a view corresponding to FIG. 2, showing a state in which the pallet is connected and held to the processing machine.
FIG. 5 is a front view showing a movement state of a pallet in a conventional transfer type cutting machine.
[Explanation of symbols]
10a first processing machine 10b second processing machine 16 pallet 20 rail 22 rail guide 26 positioning fitting hole 28 first plate material 30 second plate material 36 holding device 38 base 44 nut 46 ball screw 50 servo motor 52 movable member 58 drive means 60 Upper clamping member 62 Lower first clamping member 64 Lower second clamping member 66 Positioning pin

Claims (7)

In a transfer type cutting machine that processes a workpiece placed on a pallet with a plurality of processing machines, a first rail for transferring the pallet and laying over the plurality of processing machines, and each of the processes A holding device for holding the pallet and releasing the holding, and a moving device which is provided for each processing machine and moves the holding device in parallel with the first rail. A transfer type cutting machine characterized by comprising a feeding device for the purpose. The feeding device is provided in the processing machine and is provided in a second rail arranged in parallel with the first rail, and is provided in each processing machine, and the holding device is provided in the second rail. 2. The transfer type cutting machine according to claim 1, further comprising a moving means for moving along. The moving means includes a nut provided in the holding device, a screw that is screwed to the nut and rotates without moving in the axial direction at the position, and a rotation driving means for rotating the screw. The transfer type cutting machine according to claim 2, wherein the transfer type cutting machine is configured. The pallet is provided with first fitting means, the holding device is provided with second fitting means for fitting with the first fitting means, and the first fitting is performed when the pallet is held by the holding device. The transfer type cutting machine according to any one of claims 1 to 3 , wherein said means and said second fitting means are fitted so that the horizontal position of said pallet does not shift. A movable member provided in the processing machine to be movable in the vertical direction; a vertical clamping means for clamping the part of the pallet from the vertical direction; The transfer type cutting machine according to any one of claims 1 to 4 , further comprising a driving means for driving the upper and lower clamping means to clamp a part of the pallet by the upper and lower clamping means. The upper and lower clamping means comprises an upper clamping member and a lower clamping member for clamping a part of the pallet. When the driving means is driven, the upper clamping member and the lower clamping member come close to each other. 6. The transfer type cutting machine according to claim 5, wherein a part of the pallet is sandwiched between. A part of the pallet comprises a held member fixed to the lower side of the pallet, the held member includes the first fitting means, and the lower holding member includes the second fitting means. The transfer type cutting machine according to claim 6.

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