JPH05318164A - Device for positioning pallet in laser beam machine - Google Patents

Abstract

PURPOSE:To simplify working for positioning at the time of carrying-in the pallet by forming two guide parts in the bottom surface of pallet and engaging both guide parts to two guide rollers provided on the working table. CONSTITUTION:A 1st guide part P2 is provided parallel in Y direction on a bottom surface P1 of a pallet P, and a 2nd guide part P3 is provided in the X direction. The pallet P carried-in on a working table 1 is supported parallel in the Y direction. When the pallet P is moved in the right direction, the 1st guide part P2 is separated from a 2nd guide roller 8, a 1st positioning part 10a is brought in contact with a 1st stopper part 11a, and the positioning of X direction of the pallet P is executed. When a free bear 18 is lowered, a leg part member 13 of the pallet P is mounted on the working table 1. When a 2nd cylinder 26 is operated, a 2nd stopper part is brought by pressurizing into pressure-contact with a 2nd positioning part 10b, and the exact positioning of the XY directions of the pallet P on the working table 1 is completed.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pallet positioning device for a laser processing machine, and more particularly to a pallet positioning device for positioning a pallet loaded on a processing table.

2. Description of the Related Art Conventionally, as a pallet positioning device for a laser beam machine, a pallet supporting a workpiece is placed on the X-axis.
Direction movable table, a plurality of supporting members provided on the processing table for movably supporting the pallet in the Y direction orthogonal to the X direction, and a plurality of supporting members provided on the processing table and supported by the supporting members. Positioning means for locating the pallet at a predetermined position on the processing table, the pallet is carried in from the Y direction onto the processing table stopped at the delivery position for delivering the pallet, and the pallet is processed by the positioning means. Those configured for positioning on are known (eg,
(Kaikai Sho 63-174985).

In the above-mentioned conventional apparatus, since a large number of free bears that can be rotated are used as the supporting members, the pallet loaded onto the working table is supported by the free bears and not only in the Y direction, but also in the Y direction. It can be moved in any direction. In the prior art, the pallet is roughly adjusted in the XY direction by an operator immediately after the pallet is loaded onto the processing table, and then the locating means finally positions the pallet in the XY direction. Was going to do. As described above, in the above-described conventional apparatus, the operator needs to roughly adjust the position immediately after the pallet is loaded onto the processing table, and accordingly, the positioning work when the pallet is loaded becomes complicated.

[Means for Solving the Problems] In view of such circumstances,
According to the present invention, in the pallet positioning device described above, a first guide portion and a second guide portion are provided on the bottom surface of the pallet in parallel with the Y direction.
And a first positioning portion and a second positioning portion respectively formed on the bottom surface of the pallet, and the positioning means are arranged in a straight line in the Y direction on the machining table. A plurality of first pallets for engaging the first guide portion of the pallet to guide the pallet in the Y direction.
The guide roller is provided so as to be movable in the X direction, and is biased in the X direction by the biasing means to engage with the second guide portion of the pallet to move the first guide portion of the pallet to the first guide portion.
A plurality of second guide rollers that are pressed into engagement with the guide rollers, and a first first roller that is fixed to the processing table and that faces the first positioning portion of the pallet loaded onto the processing table.
The second positioning portion of the pallet is provided so as to face the stopper portion and the second positioning portion of the pallet loaded on the processing table, and to be movable back and forth in the X direction by the drive mechanism, and to be moved to the forward end. And the entire pallet is moved in the X direction against the biasing means to forcibly release the engaged state between the first guide portion of the pallet and the first guide roller, and at the same time The first positioning part is configured to contact the first stopper part, and the second positioning part of the pallet and the second stopper part of the positioning means are in contact with each other. The second positioning part of the pallet when
It is an uneven surface to be located at a predetermined position in the direction.

According to this structure, when the pallet is carried onto the processing table, the second guide portion of the pallet engages with the second guide roller of the positioning means,
The pallet is supported on the supporting member of the working table in a state parallel to the Y direction. Next, the stoppers of the positioning means are brought into contact with the positioning portions of the pallet to finally position the pallet on the working table at a predetermined position in the XY directions. As described above, since it is not necessary for the operator to roughly adjust the direction of the pallet when loading the pallet onto the processing table, it is possible to simplify the positioning work when loading the pallet as compared with the above-described conventional method. .

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a plan view of a three-dimensional laser processing machine. This three-dimensional laser processing machine has a pallet P supporting a workpiece W. The processing table 1 is mounted and is movable in the X direction. The workpiece W of this embodiment is supported at the center of the upper surface of the pallet P via a jig (not shown), and therefore a plurality of bolts for fixing the jig to the required positions on the upper surface of the pallet P. Holes and guide grooves are provided. Delivery tables 2 and 3 are provided on both left and right sides of the processing table 1, and these delivery tables 2 and 3 can support the pallet P so as to be movable in the Y direction orthogonal to the X direction. .. Each of the delivery tables 2 and 3 is provided with a delivery means 4 capable of reciprocating in the Y direction. By moving the delivery means 4 back and forth in the Y direction, the delivery table 4 is stopped at the delivery position A shown in FIG. While the pallets P are alternately loaded onto the processing table 1 from the respective delivery tables 2 and 3, the pallets P can be alternately delivered from the processing table 1 stopped at the delivery position A onto the respective delivery tables 2 and 3. ing. A gate-shaped frame 5 is provided on the processing table 1 so as to straddle the processing table 1, and a processing head 6 movable in the Y direction is attached to the gate-shaped frame 5. The processing head 6 can irradiate a laser beam toward the workpiece W on the pallet P carried into the processing table 1 and can tilt itself. Therefore, the workpiece W on the pallet P carried onto the processing table 1 is
Relative movement between the machining head 6 and the machining head 6 and the machining head 6
The required laser processing is performed depending on the inclination of itself. Then, as shown in FIG. 2 and FIG.
The rectangular pallet P is provided with a first guide portion P2 and a second guide portion P3 on the bottom surface P1 thereof in parallel with the Y direction and maintaining a predetermined distance in the X direction. Then, both of these guide portions P2 and P3 are engaged with a first guide roller 8 and a second guide roller 9 provided on the side of the processing table 1 which will be described later, whereby the pallet P is guided in the Y direction. It is supposed to be brought in. In addition, the bottom surface P1 that is on the outer side (left side) than the second guide portion P3
Positioning members 10 are respectively fixed to both corners of the positioning member 10, and as shown in an enlarged view in FIGS. 6 and 7, the positioning member 10 is parallel to the Y direction with its inner side (right side) facing. The flat surface is used as the first positioning portion 10a, and the concave portion having a conical surface with the outer side facing is used as the second positioning portion 10b. By bringing both of these positioning portions 10a and 10b into contact with a first stopper portion 11a and a second stopper portion 12a of the processing table 1 described later and sandwiching them from both sides,
The pallet P on the processing table 1 is accurately positioned at a predetermined position in the XY directions. Further, the leg members 13 are vertically downward at the three corners of the bottom surface P1 on the outer side (right side) of the first guide portion P2 and the central portion of the bottom surface P1 on the positioning member 10 side. It is fixed toward The lower surface of each of these leg members 13 is a flat surface,
Further, the outer peripheral portion of the lower end is enlarged in a flange shape. Then, as will be described later, when the positioning of the pallet P on the working table 1 is completed, the lower surface of the leg member 13 is placed on the upper surface of the working table 1, and the lower end of the leg member 13 in that state is expanded. The diameter portion is fixed by a conventionally known clamp mechanism 14 provided on the processing table 1. Next, the processing table 1 of the present embodiment will be described. On the upper surface of the processing table 1, a pair of supporting means 15 and 15 'are provided in parallel with the Y direction, and the supporting means 15 and 15' serve to support the pallet. The bottom surface P1 of P is supported. That is, the supporting means 15, 1
5'includes rod-shaped brackets 16 and 16 'formed in an L-shaped cross section and fixed to the processing table 1 in the Y direction. Casings 17 and 17 having a rectangular cross section are provided on the upper surfaces of the brackets 16 and 16'. It is fixed parallel to the Y direction. As shown in FIG. 4 and FIG. 5 in an enlarged manner, spherical free bears 18 serving as support members are provided at the equally spaced positions of these casings 17 so as to be retractable. A conduit 19 for supplying and discharging compressed air is provided in the casing 17, and a conduit 19 is supplied from a compressed air supply source (not shown).
When compressed air is supplied to the casing 17 via
Each free bear 18 is floated above the upper surface of the casing 17, and when the compressed air is discharged, each free bear 18 is lowered below the upper surface of the casing 17. .. In the present embodiment, the pallet P is loaded onto the working table 1 from the Y direction in a state where the free bears 18 are floated. Therefore, the pallet P loaded on the working table 1 is loaded.
Is movably supported by the respective free bears 18 on its bottom surface P1. On the left side end surface of the right bracket 16 'in FIG. 2, the above-described first guide rollers 8 are rotatably provided at six equally spaced positions. Then, when the pallet P is carried onto the processing table 1, the first guide portions P2 of the pallet P are engaged with the first guide rollers 8 positioned on the straight line in the Y direction. Further, the above-mentioned second guide roller 9 is rotatably provided on the right end surface of the left bracket 16 at six positions at equal intervals via the bracket 20.
The second guide roller 9 is X with respect to the bracket 20.
It is mounted so as to be swingable in any direction, and is constantly urged by the coil spring 21 toward the left in FIG.
Then, when the pallet P is loaded onto the processing table 1, the second guide roller 9 engages with the second guide portion P3 of the pallet P and urges the entire pallet P toward the left side in FIG. Therefore, the first guide portion P2 of the pallet P and the first guide roller 8 which are engaged with each other are further strongly pressed against each other. Therefore, when the pallet P is carried into the working table 1, the pallet P is placed on the working table 1 in a state parallel to the Y direction.
Further, on the upper surface of the processing table 1, a pair of stopper members 11 is fixed at a predetermined position on the left side of the left side supporting means 15, and the left side of the stopper members 11 is directed. The above-mentioned first flat surface parallel to the Y direction
The stopper portion 11a is used. These first stopper parts 1
When the pallet P is carried onto the processing table 1, the la 1a faces both the first positioning portions 10a of the pallet P. Further, a pair of air cylinder mechanisms 24 are provided on the processing table 1 so as to be slightly separated from the stopper members 11 in the X direction, and these air cylinder mechanisms 24 are driven in synchronization. There is.
As shown in an enlarged manner in FIGS. 6 and 7, the air cylinder mechanism 2
4 includes a first cylinder 25 and a second cylinder 26, and a guide member 27 fixed to the working table 1.
The rod 12 slidably penetrated through the guide hole 27a. The tip portion of the rod 12 is formed in a hemispherical shape, which serves as the second stopper portion 12a described above.
Further, the second stopper portion 12a faces the first stopper portion 11a. Then, when the pallet P is loaded onto the processing table 1, the second stopper portion 12a is retracted to the position indicated by the solid line and faces the second positioning portion 12a of the pallet P. The other end of the rod 12 is connected to the piston 25a of the first cylinder 25, and at the same time, the piston 26a of the second cylinder 26 is brought into contact with the end surface of the step formed on the outer peripheral portion of the rod 12. The piston 25a of the first cylinder 25 is adapted to be moved back and forth in the X direction, while the piston 26a of the second cylinder 26 is moved back and forth in the direction of the arrow in FIG. In this embodiment, the first cylinder 25 is first operated and then the second cylinder 26 is operated to advance the rod 12 in two steps to the advance end position. That is, when both cylinders 25 and 26 are in the non-operating state, the rod 1
2 is located at the retracted end indicated by the solid line, and when the pallet P is loaded onto the working table 1 in this state, first the first cylinder 25 is operated to move the rod 12 forward to the right. As a result, the second portion of the tip of the rod 12
The stopper portion 12a is the second positioning portion 10b of the pallet P.
Since the pallet P is moved toward the right by contacting the
As shown by an imaginary line, the first positioning portion 10a of the pallet P
Contacts the first stopper portion 12a. After that, the second cylinder 26 is actuated and pushes the rod 12 toward the right further, so that the second stopper portion 12a is pressed against the second positioning portion 10b of the pallet P more strongly. Both of the cylinders 25 and 26 are a set of two conduits 25.
b, 25b ', 26b, 26b' are connected to a compressed air supply source (not shown), and a solenoid valve (not shown) for switching the flow path of compressed air is provided in the middle of each of the conduits. There is. Then, by supplying compressed air into both cylinders 25, 26 via the conduits 25b, 26b on the left side, the pistons 25a, 26a are moved forward as described above, while compressed by the solenoid valve. Switch the air flow path,
From the right conduits 25b ', 26b' to both cylinders 25, 2
6 by supplying compressed air into each piston 25
A and 26a are retreated to the retracted position.
Further, in this embodiment, both of the guide rollers 8 and 9 described above are used.
The stopper member 11 and both air cylinder mechanisms 24 constitute a positioning means 28. Further, on the processing table 1, in addition to the supporting means 15 and 15 ′ and the positioning means 28, the above-mentioned clamping mechanism 14 for fixing the pallet P which has been positioned on the processing table 1 is provided. The structure of the clamp mechanism 14 is known in the related art, and is operated by supplying compressed air, and when actuated, the claw portion 14a is projected, and the claw portion 14a causes the pallet P to move. The outer peripheral portion of the lower end of the leg member 13 is clamped (FIG. 3). (Operation) The operation from the loading of the pallet P onto the processing table 1 based on the above-described configuration to the positioning will be described with reference to FIGS. First, the processing table 1 stopped at the delivery position A before carrying in the pallet P is the support means 1.
While the free bears 5 and 15 'are floated while the cylinders 25 and 26 of the air cylinder mechanism 24 are not operated, the rod 12 provided with the second stopper portion 12a is located at the retracted end. Further, since the clamp mechanism 14 is not operated, the claw portion 14a is retracted (A in FIG. 8). In this state, the pallet P is loaded onto the processing table 1 from the Y direction orthogonal to the paper surface. At this time, the pallet P has its bottom surface P1 movably supported by the floating free bear 18, and
The guide portions P2, P3 are carried onto the working table 1 while being engaged with the guide rollers 8, 9. Therefore, the pallet P loaded on the processing table 1 is already supported on the processing table 1 at this point in a state parallel to the Y direction. Further, in the pallet P loaded on the processing table 1 in this manner, both positioning portions 10a and 10b are located between both stopper portions 11a and 12a of the processing table 1 and face them (FIG. 8). A). Next, since the first cylinder 25 is operated to move the rod 12 forward to the right, the second stopper portion 12a formed on the rod 12 is moved.
Contacts the second positioning portion 10b of the pallet P, and moves the pallet P toward the right against the spring 21 while maintaining the contact state. As a result, the first guide portion P2 of the pallet P is forcibly separated from the second guide roller 8 and the first positioning portion 10a of the pallet P contacts the first stopper portion 11a of the working table 1, so that the pallet P Is positioned in the X direction. At this point, the second stopper portion 12a is in contact with the second positioning portion 10b of the pallet P, so that the positioning of the pallet P in the Y direction on the working table 1 is almost completed. Even at this point,
Since the bottom surface P1 of the pallet P is movably supported by the free bear 18, the pallet P can be easily moved (B in FIG. 8). Next, since the free bear 18 is lowered, the bottom surface P1 of the pallet P is placed on the upper surface of the casing 17, and the leg members 13 of the pallet P are placed on the upper surface of the processing table 1. Then, after this, the second cylinder 26 is operated and the rod 12 is further urged toward the right side, so that the second stopper portion 12a is strongly pressed against the second positioning portion 10b of the pallet P. As shown in FIG. 6, the second positioning portion 10b of the pallet P has a conical concave surface, while the second stopper portion 12a has a concave shape.
Have a hemispherical shape, so that they are pressed against each other to complete the accurate positioning of the pallet P on the processing table 1 in the XY directions (C in FIG. 8). Finally, since the clamp mechanism 14 is operated, the claw portion 14
The lower end of the leg member 13 of the pallet P is fixed on the working table 1 by a (D in FIG. 8). Through the operation process described above, the loading of the pallet P onto the processing table 1 and the positioning work in the XY directions are completed. And after this,
The processing table 1 is moved in the X direction, and the required laser processing is performed on the workpiece W on the pallet P supported on the processing table 1, and the laser processing ends and the processing is performed again. When the table 1 is returned to the delivery position A shown in FIG. 1, the pallet P is unloaded from the working table 1 through an operation process reverse to that of the loading of the pallet P shown in FIG. As described above, according to this embodiment, the pallet P is provided with both guide portions P2 and P3, and the machining table 1
Since the positioning means 28 has both guide rollers 8 and 9, the pallet P is already guided in the Y direction at the time when the pallet P is loaded on the processing table 1. Therefore, immediately after this, the pallets P are immediately moved to both cylinders. The final positioning in the XY directions can be performed by means of 25 and 26. Therefore, the operator of the laser beam machine does not need to roughly adjust the position of the pallet P carried into the processing table 1 in the XY directions before the positioning by the positioning means 28, and the pallet P is correspondingly adjusted.
The positioning work of is simplified. In the embodiment described above, the positioning member 10 formed of a single member is
Although the first positioning portion 10a and the second positioning portion 10b are formed, the positioning member 10 is divided into two, the first positioning portion 10a is formed on one side, and the second positioning portion 10b is formed on the other side. Is also good.

As described above, according to the present invention, it is possible to obtain an effect that the positioning work at the time of carrying in a pallet can be simplified as compared with the prior art.

[Brief description of drawings]

FIG. 1 is a plan view of a laser processing machine showing an embodiment of the present invention.

FIG. 2 is a detailed plan view of the processing table 1 shown in FIG.

FIG. 3 is a front view of FIG.

FIG. 4 is an enlarged view of a main part of FIG.

5 is an enlarged view of the main part of FIG.

6 is an enlarged view of the main part of FIG.

7 is a side view taken along the arrow VII in FIG.

FIG. 8 is a diagram showing an operation process of the present embodiment.

[Explanation of symbols]

1 Processing Table 8 First Guide Roller 9 Second Guide Roller 10a First Positioning Part 10b Second Positioning Part 11a First Stopper Part 12a Second Stopper Part 18 Free Bear (Supporting Member) 21 Spring 24 Air Cylinder Mechanism 28 Positioning Means W Covered Workpiece P pallet

Claims (1)

[Claims] 1. A processing table on which a pallet supporting a workpiece is placed and movable in the X direction, and a pallet provided on the processing table and movably supported in the Y direction orthogonal to the X direction. A plurality of supporting members and a positioning means provided on the processing table for positioning the pallet supported by the supporting member at a predetermined position on the processing table, and on the processing table stopped at the delivery position for delivering the pallet. In a pallet positioning device of a laser processing machine configured to carry in a pallet from the Y direction and to position the pallet on a processing table by the positioning means, a pallet positioning device is provided on the bottom surface of the pallet in parallel with the Y direction. The second guide part is formed, and the first positioning part and the second positioning part are respectively formed on the bottom surface of the pallet. A plurality of first guides, which are arranged in a straight line in the Y direction on the processing table and engage with the first guide portions of the pallet to guide the pallet in the Y direction. The roller is provided so as to be movable in the X direction, and is biased in the X direction by the biasing means to engage with the second guide portion of the pallet to move the first guide portion of the pallet to the first guide roller. A plurality of second guide rollers that are pressed into engagement with each other;
A first stopper portion fixedly provided on the processing table and facing a first positioning portion of the pallet loaded on the processing table, and a second stopper portion of the pallet loaded on the processing table.
The pallet is provided so as to face the positioning part and to be movable back and forth in the X direction by a drive mechanism, and when the pallet is moved to the forward end, contacts the second positioning part of the pallet and resists the urging means to the entire pallet. Second stopper for forcibly releasing the engagement state between the first guide portion of the pallet and the first guide roller by moving the first positioning portion of the pallet to the first stopper portion at the same time by moving the pallet in the X direction. Each of the abutting portions of the second positioning portion of the pallet and the second stopper portion of the positioning means, and the second positioning portion of the pallet in the Y direction when they abut each other. A pallet positioning device for a laser processing machine, which has an uneven surface to be positioned at a predetermined position.