JPH10166168A - Material index device in iaser beam machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a material index device in an automatically operable laser beam machine provided with a material detecting means automatically detecting positional deviation or defective installation after installing a material and a power chuck. SOLUTION: In this material index device, a material rotating member 21 is provided in the face plate 19 of a main body frame 15 so as to freely rotate, a servo motor 31 dividing the rotation of the material rotating member 21 and a clamp cylinder 49 pressing and fixing the material W are provided via an accumulator 51, a pair of fixing coupling connected to the clamp cylinder 49 and the accumulator 51 is provided in the material rotating member 21, a pair of transfer coupling attachable and detachable to the fixing coupling is provided in the coupling transfer means provided in the main body frame 15, and the transfer coupling is connected to an air source via a direction control valve.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a material indexing device for a laser beam machine.

[0002]

2. Description of the Related Art In a material indexing device of a laser beam machine, in particular, a chuck of a material indexing device for rotationally positioning a cylindrical material such as a pipe is provided with an air chuck or other material in order to allow the material to pass through the inside of the chuck. It is difficult to employ a power chuck, and a manual three-jaw or four-jaw chuck is used. In a manual chuck, whether or not a material is correctly mounted on the chuck depends on visual observation.

[0003]

In the material indexing apparatus as described above, since the material is manually mounted, a large amount of labor and time are required for mounting, and the automatic operation cannot be performed. In addition, there is no means for automatically detecting if the mounting position of the material is shifted or deviated during processing after mounting the material, so that even if a processing defect occurs, it cannot be detected. is there.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a power chuck and a material detecting means for automatically detecting a displacement or a mounting failure after mounting a material. The object of the present invention is to provide a material indexing device for a laser beam machine which can be automatically operated and has a function of:

[0005]

According to a first aspect of the present invention, there is provided a material indexing device for a laser beam machine, wherein a plurality of rotatable bearings are provided on a face plate of a main body frame for an outer periphery of a material rotating member. A support roller is provided, a gear is provided on the outer periphery of the material rotating member, and two drive gears that engage with the gear are provided on the main body, and the material rotating member has a notch shorter than an axial distance between the two drive gears. Providing a groove, providing a servomotor for rotating and indexing the material rotating member on the face plate via the two drive gears, and providing a clamp cylinder for pressing and fixing the material on the material rotating member via an accumulator, A pair of fixed couplings connected to a clamp cylinder and an accumulator are provided on the material rotating member and detachable from the fixed coupling. Provided such pair of moving couplings to the coupling movement means provided in the main body, it is an Abstract that formed by connecting the mobile coupling to an air source through a directional control valve.

According to a second aspect of the present invention, there is provided a material indexing device for a laser beam machine, wherein the coupling moving means is a fluid pressure cylinder. It is.

According to a third aspect of the present invention, there is provided a material indexing device for a laser beam machine, wherein a plurality of support rollers for rotatably supporting the outer periphery of a material rotating member are provided on a face plate of a main body frame, and a gear is provided on the outer periphery of the material rotating member. The main body is provided with two drive gears that are provided and engaged with the gears, and the material rotating member is provided with a notch groove shorter than the distance between the axes of the two drive gears, and the face plate is provided with the two drive gears through In a material indexing device provided with a servo motor for rotating and indexing the material rotating member, a spring return type single-acting clamp cylinder for pressing and fixing the material to the material rotating member is provided, and the material rotating member is attached to the face plate. A C-shape which is provided in close contact with the rotatable member and which covers substantially the entire area of the material rotating member on the surface of the face plate facing the material rotating member; An accumulator chamber is formed, a flow path communicating from the clamp cylinder to the upper part of the accumulator chamber is formed, and a check valve for preventing the outflow of fluid from the clamp cylinder side is provided at an end of the flow path. The invention is characterized in that a check valve opening / closing means for opening and closing the check valve is provided on the face plate side, and the accumulator chamber is connected to a pressure source via a direction control valve.

According to a fourth aspect of the present invention, there is provided a material indexing device for a laser beam machine, wherein the pressing means is a fluid pressure cylinder. .

Therefore, according to the invention as set forth in claims 1 to 4, in the material indexing device of the laser beam machine, since the power chuck which can be used even during the indexing process is provided, the automatic operation can be performed. Became possible. Also, the material loading can be automated,
The material mounting time can be greatly reduced as compared with the case of manual operation.

According to a fifth aspect of the present invention, there is provided a material indexing device for a laser beam machine, wherein the material indexing device of the laser beam machine according to the first or third aspect is configured to detect material loading on the material rotating member. The gist is that a device is provided.

Therefore, even if the mounting position of the material is shifted or deviated during the processing after the mounting of the material, it can be automatically detected. For this reason, it is possible to minimize the occurrence of processing defects.

According to a sixth aspect of the present invention, there is provided a material indexing device for a laser beam machine, wherein the material mounting detecting device is provided on the material rotating member together with the material rotating member. A rotating signal detection ring, two signal detectors provided on a face plate of a main body frame that comes into contact with the signal detection ring at a wider interval than the notch groove, and a contact operated by mounting a material to the material rotating member And an electric circuit provided between the two signal detectors and a power supply. When the contact is ON, at least one of the electric circuits between the signal detector and the power supply conducts. The gist of the present invention is to detect material attachment.

Therefore, even when the material indexing device is rotating, it is possible to automatically detect material loading.

According to a seventh aspect of the present invention, there is provided a material indexing device for a laser beam machine, wherein the contact comprises a movable contact comprising a material contact member and a contact member; The movable contact comprises a fixed contact capable of contacting the movable contact, the movable contact being pivotally supported on the material rotating member, and an elastic machine for protruding one side of the movable contact from the material support surface is used as the movable contact. Along with the provision, a fixed contact provided with an air flow path substantially at the center is provided so as to be able to contact the other side of the movable contact, and when the contact is in a non-contact state, air is ejected from the fixed contact to the material supporting portion. It is an abstract.

Therefore, the material can be accurately mounted on the material supporting portion, and the processing accuracy is improved.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show an example in which a material indexing device of a laser beam machine according to the present invention is used for a cantilever type three-axis optical axis moving type NC laser beam machine. FIG. 1 shows a laser beam machine 1
FIG. 2 is a side view taken along a line II-II in FIG.

Referring now to FIGS. 1 and 2, the laser beam machine 1 is an X-axis carriage which is movable and positionable in the X-axis direction by X-axis driving means driven under the control of an NC device (not shown). The X-axis carriage 3 is provided with a Y-axis drive unit that can be moved and positioned in a Y-axis direction orthogonal to the X-axis direction by a Y-axis drive unit driven under the control of an NC device (not shown). A shaft carriage 5 is provided. Below the Y-axis carriage 5, there is provided a laser processing head 7 which can be moved and positioned in the Z-axis direction orthogonal to the X and Y axes, and the laser processing head 7 has a light-collecting device for laser processing. A nozzle 9 having (not shown) is attached.

Also, on the upper part of the laser beam machine 1,
A carbon dioxide laser oscillator 11 is provided, and a laser beam from the carbon dioxide laser oscillator 11 is guided to the nozzle 9 by a not-shown optical system via a laser processing head 7 provided on the Y-axis carriage 5. Is configured.

In the above-mentioned cantilever type three-axis optical axis moving type NC laser beam machine, the work area below the laser beam head 7 depends on the content of the work, for example, when a plate material is machined, a work table (shown in the figure). Omitted), and when processing a pipe, the material indexing device 13 can be installed as shown in FIGS. The pipe W mounted on the material indexing device 13 can be continuously index-controlled by a pipe rotation servomotor driven under the control of the NC device of the laser beam machine 1. .

Next, a first embodiment of the material indexing device 13 will be described with reference to FIG.
The main body frame 15 having a C-shaped groove of the material indexing device 13A of the first embodiment is constituted by a face plate 19 erected on a base 17. On one side surface of the face plate 19, five support rollers 23 that engage with guide grooves (not shown) provided on the outer periphery and rotatably support the material rotating member 21 are provided at substantially equal intervals. is there. The material rotating member 21 is provided with a C-shaped groove substantially identical to the C-shaped groove of the main body. The support roller 23
Is a rotating shaft 2 fixed to the face plate 19 of the main body frame 15.
5 is provided rotatably.

The material rotating member 21 is provided with, for example, a notch groove 27 having a width L for carrying a pipe W into and out of the material rotating member 21. Therefore, the appearance of the material rotating member 21 is substantially “C-shaped”. Further, a gear 29 is provided on the outer diameter portion of the material rotating member 21, and two driving gears 33 driven by the servomotor 31 are engaged with the gear 29 of the outer diameter portion.

The drive gear 33 is mounted on the body frame 1.
The rotation shaft 35 provided on the front side of the face plate 19 of No. 5 is provided for rotation. The rotating shaft 35 extends through the face plate 19 and extends to the back side of the face plate. A pulley (not shown) such as a toothed pulley is rotatable around the rotating shaft 35 extending to the back side. It is provided in. Similarly, an output shaft (not shown) of the servo motor 31 provided on the front side of the face plate 19 is also provided so as to protrude on the back side of the face plate 19, and a drive pulley provided on the output shaft (not shown) of the servo motor 31. A belt 37 such as a toothed belt is wound around a pulley (not shown) provided on the rotation shaft 35 of the drive gear 33 (not shown).

The center distance between the two drive gears is set to be larger than the width L of the cutout groove 27 provided in the material rotating member 21. Further, a tension adjusting means 39 for adjusting the tension (tension) of the belt 37 for driving the driving gear 33 to an appropriate tension is provided.

Various types of tension adjusting means can be adopted. In the tension adjusting means 39 of this embodiment, a swing arm 41 is provided on the back side of the face plate 19 by a rotating shaft. A rotating roller 45 is provided at the other end of the swing arm 41 so as to press and engage with the belt 37 at an appropriate angle range around the center 43.

In the above configuration, if the servo motor 31 is driven under the control of the NC unit, the material rotating member 2
1 can be rotationally driven by the two drive gears 33 at the designated rotational speed in the designated rotational direction by the designated rotational angle.

At the bottom of the cutout groove 27 of the material rotating member 21, a material support portion 47 for holding and fixing a material W such as a pipe is provided. The material supporting portion 47 on one side of the notch groove 27 at the front of the material rotating member 21 has a material W
Is provided with a clamp cylinder 49 for pressing and fixing. It should be noted that a pneumatic or hydraulic cylinder can be used as the clamp cylinder, and in the present embodiment, an example in which a pneumatic cylinder is used as the clamp cylinder will be described.

Referring to FIGS. 3 and 4, an accumulator 51 for supplying compressed air to the clamp cylinder 49 is provided on the other side of the notch groove 27 at the front of the material rotating member 21. is there. This accumulator 5
1 and the piston side of the clamp cylinder 49 are connected by a pipe 53. In order to supply compressed air to the pipe 53, a coupling 57 is provided at the end of the pipe 53 on the back side of the material rotating member 21 so that the pipe 53 can be connected to the air pressure source 55 with one touch. Similarly, a pipe 59 is provided for supplying compressed air to the rod side of the clamp cylinder 49, and a coupling 61 capable of connecting the pipe 59 to the pneumatic source 55 with one touch at the end of the pipe 59. Are provided on the back side of the material rotating member 21. The material W is attached to the end of the piston rod of the clamp cylinder 49.
And a pressing plate 52 for holding the material W in cooperation with the pressing plate 50 is provided on the side facing the pressing plate 50.

When the material rotating member 21 is located at the origin position (the position shown in FIG. 3), the air pressure source 55 and the pair of couplings 57, 61 provided on the back side of the material rotating member 21.
And a pair of movable couplings 6 that can be connected with one touch
Reference numerals 3 and 65 are provided on the body frame 15 of the material indexing device 13A so as to be able to advance and retreat. The moving couplings 63 and 65 are held by a coupling holding body 69 which moves forward and backward by a coupling moving cylinder 67 provided on the main body frame 15. It should be noted that either pneumatic or hydraulic pressure may be used for the coupling moving cylinder 67, but in the description of the present embodiment, an example using a pneumatic cylinder cylinder is described.

The moving coupling 63 is connected to the A port of the first electromagnetic directional control valve 73 via a line 71, and the moving coupling 65 is connected to the first electromagnetic directional control valve via a line 75. 73 is connected to the B port. And
The P port of the first electromagnetic directional control valve 73 is connected to the pneumatic source 55. The piston side of the coupling moving cylinder 67 is connected to the A port of the second electromagnetic directional control valve 79 via a pipe 77, and the rod side is connected to the B port via a pipe 81. . The P port of the second electromagnetic directional control valve 79 is connected to the pneumatic source 55.
Connected to

In the above configuration, the material rotating member 21 rotates about the rotation center O and the origin position (the state shown in FIG. 3).
Is returned to the position where the pair of couplings 57 and 61 provided on the material rotating member 21 and the movable couplings 63 and 65 provided on the main body frame 15 side can be connected. The material rotating member 21 returns to the original position (the state shown in FIG. 3) by a known detecting means (not shown) such as a proximity switch or a limit switch. Can be detected.

In the above state, the solenoids (electromagnetic coils) SOL1, SOL2 and SOL3 of the first electromagnetic directional control valve 73 and the second electromagnetic directional control valve 79 are all in a non-excited state. Therefore, the first electromagnetic directional control valve 73 is at the neutral position, and the second electromagnetic directional control valve 79 is in a state where the P port and the B port are in communication. Therefore, the high pressure air is not supplied to the moving couplings 63 and 65 from the pneumatic source 55, and the high pressure air is supplied to the rod side of the coupling moving cylinder 67 through the pipe 81. The piston rod of the coupling movement cylinder 67 is in the retracted position.

In the above state, if the solenoid SOL3 of the second electromagnetic directional control valve 79 is excited, high pressure air is supplied from the pneumatic source 55 to the piston side of the coupling moving cylinder 67, and the rod side communicates with the atmosphere. In this state, the piston rod moves forward to move the coupling 63,
65 and the couplings 57 and 61 are connected. Therefore, the solenoid SOL1 of the first electromagnetic directional control valve 73
Is excited, high-pressure air is supplied from the pneumatic source 55 through the pipe 71 to the accumulator 51 and the clamp cylinder 4.
9, the clamp cylinder 49 is advanced to fix the material W.

In the above process, when the material W is fixed, the solenoid SOL3 of the second electromagnetic directional control valve 79 is de-energized, and the coupling moving cylinder 67 is retracted.
Moving couplings 63 and 65 and couplings 57 and 61
At the same time as disconnecting the solenoid, the solenoid SOL1 of the first electromagnetic directional control valve 73 is de-energized,
The supply of high-pressure air from the pneumatic source 55 to 3, 65 is cut off.

In the above state, the material rotating member 21
Since the material W is rotatable while holding the material W, the laser processing can be performed while rotating the material W to an arbitrary position by driving the material rotating member 21 by the servo motor 31. As the air is supplied from the accumulator 51 to the slight leakage of air from the clamp cylinder 49 while the material rotating member 21 is rotating, the clamping force of the clamp cylinder 49 does not decrease. In addition, since the rotation of the material rotating member 21 is driven by two drive gears having an inter-axis distance larger than the width L of the notch groove 27 of the material rotating member 21, the material rotating member 21 is rotated within a range of 360 degrees. Can be driven. Further, since the cutout groove 27 is provided in the material rotating member 21, the material W can be loaded and unloaded from above the material indexing device, so that the material can be easily attached to and detached from the material indexing device.

When the laser processing of the material W is completed, the material rotating member 21 is returned to the home position, the solenoid SOL3 of the second electromagnetic directional control valve 79 is excited, and the coupling moving cylinder 67 is moved forward to move. At the same time that the couplings 63 and 65 are connected to the couplings 57 and 61, the solenoid SOL2 of the first electromagnetic directional control valve 73 is set to the excited state, and the first electromagnetic directional control valve 73 is set.
When the port P and the pipe 75 are communicated with each other and the port B and the pipe 71 are opened to the atmosphere via the port A, the clamp cylinder 49 retracts to release the fixing of the material W and release the material W.
Can be removed. If there is a new processing, the next processing can be performed by fixing the material W through the above-described steps.

Next, a material indexing device 13B of a laser beam machine according to a second embodiment will be described with reference to FIGS. 5, 6, and 7. FIG. The main body frame 15 of the material indexing device 13B of the second embodiment and the drive mechanism of the material rotating member 21 are the same as those of the material indexing device 13A of the first embodiment, and will not be described. The same parts as those of the material indexing device 13A are denoted by the same reference numerals.

In the material indexing device 13B, a so-called single-acting clamp cylinder 83 having a spring return is provided on the material rotating member 21 instead of the double-acting clamp cylinder 49 in the material indexing device 13A. It should be noted that a pneumatic or hydraulic cylinder can be used as the clamp cylinder, and the present embodiment has been described using an example in which a pneumatic cylinder is used.

The material rotating member 21 is provided in close contact with the face plate 19 of the main body frame 15 so as to be rotatable, and the face plate 19 is provided on a surface facing the material rotating member 21 in a C-shape covering substantially the entire area of the material rotating member 21. The accumulator chamber 85 is formed. A seal member 87 keeps airtight between the material rotating member 21 and the C-shaped accumulator chamber 85.

A flow passage 89 communicating from the clamp cylinder 83 to the upper part of the accumulator chamber 85 is provided in the material rotating member 21, and an end of the flow passage 89 communicating the flow passage 89 and the accumulator chamber 85. Is a check valve 91 for preventing air from flowing out from the clamp cylinder 83 side.
Is provided. Also, the face plate 19 of the body frame 15
A fluid pressure cylinder 93 is provided on the side as a check valve opening / closing means for opening and closing the check valve 91 freely. Further, the accumulator chamber 85 is provided with an air supply port 95 connected to a pneumatic source via a direction control valve (not shown). It should be noted that a pneumatic or hydraulic cylinder can be used as the fluid pressure cylinder 93, and in the present embodiment, an example using the pneumatic cylinder 93 has been described.

In the normal state, the check valve 91 is normally closed because the ball 99 is pressed by the spring 101 against the valve seat at the end of the flow path 89. On the other hand, the piston rod 97 advances to the piston rod 97 of the pneumatic cylinder 93 and the ball 99 of the check valve 91 moves forward.
Is pressed, the accumulator chamber 85 and the clamp cylinder 83 communicate with the discharge port 103 through the flow path 105.
Is provided.

In the above configuration, the directional control valve (not shown) connected to the air supply port 95 is appropriately operated to cut off the air supply from the directional control valve, and the pneumatic cylinder 93 as the check valve opening / closing means. By appropriately operating a directional control valve (not shown) to advance the piston rod 97 and press the ball 99 of the check valve 91, the accumulator chamber 85 and the clamp cylinder 83 are moved.
Is communicated to the outlet 103 through the flow path 105, and the air in the clamp cylinder 83 and the accumulator chamber 85 is exhausted to the atmosphere through the outlet 103.

As a result, the clamp cylinder 83 is retracted by the spring, and the fixing of the material W is released. When fixing the material W, the material W is mounted between the pressing plate 50 provided at the end of the piston rod of the clamp cylinder 83 and the pressing plate 52 provided on the material rotating member 21 in this state, and The check valve 91 is closed by retracting the pneumatic cylinder 93 serving as a stop valve opening / closing means, and a direction control valve (not shown) connected to the air supply port 95 is appropriately operated to allow the air supply port 95 to operate. When air is supplied to the accumulator chamber 85 from above, the air is supplied from the accumulator chamber 85 to the clamp cylinder 83 through the check valve 91 to fix the material.

In the above state, the servo motor 31 is driven under the control of the NC unit to drive the material rotating member 21.
Can be rotated to perform laser processing of a desired shape on the material W. While the material rotating member 21 is passing over the accumulator chamber 85, the pressure from the accumulator chamber 85 is applied to the clamp cylinder 83 via the check valve 91, and the air leaks from the clamp cylinder 83. Can be covered. Further, when the check valve 91 provided on the material rotating member 21 is located at a position outside the accumulator chamber 85, the check valve 91 is closed and air does not leak from the clamp cylinder 83.

FIGS. 8, 9 and 10 show a 13C of a third embodiment of the material indexing device of the laser beam machine.
Is shown. Most of 13C of the third embodiment is the same as the first embodiment, and is common except for the material loading detection device 107 provided on the material rotating member 21 of the material indexing device. Illustration and explanation of parts not required for this embodiment are omitted.

Referring to FIGS. 8, 9 and 10, a C-shaped signal detection ring 109 is fixed to the outer periphery of the material rotating member 21 by an appropriate means such as screwing or bonding. The outer periphery of the signal detection ring 109 is made of a good electric conductor, and the conductor and the material rotating member 2
1 is electrically insulated.

The material loading detecting device 107 is composed of an electrical contact which operates according to the weight of the material W when the material W is loaded on the material supporting portion 47, and an electrical circuit which operates according to the ON state of the contact. is there.

The electrical contact is provided by providing a box-shaped housing 113 opened upward on the lower surface of the material support plate 111 at the bottom of the material support portion 47.
A movable contact 123 formed by integrally connecting a material contact member 117 contacting the material W and a contact member 119 contacting the fixed contact 127 to the swing shaft 115 provided on the movable shaft 123 so that the movable contact 123 can swing. At the same time, the air flow path 12
5 is provided on the housing 113, and one end of the movable contact 123 is provided on the fixed contact 127 so as to be freely contactable. Also, the fixed contact 127
Is connected to the pipe 53 between the clamp cylinder 49 and the piston via a pipe joint 142. The fixed contact 127 is provided electrically insulated from the pipe joint 142.

The other end of the movable contact 123 is urged upward by a resilient device 129 such as a coil spring or a urethane spring provided in the housing 113, and a material support plate on the upper surface of the housing 113. 1
A hole 131 is provided in 13 so that a part of the movable contact 123 can protrude and retract to a position above the material support plate 111.

As shown in the electric circuit of FIG. 10, the above-mentioned electric contact mechanism includes the above-mentioned oscillating shaft 115 having an appropriate resistor 133 and
Power supply 1 via normally open relay contact 137 of relay 135
It is connected to the-(minus) side of 39 and to the electric conductor on the outer periphery of the signal detection ring 109. One end of the fixed contact 127 is connected to the + (plus) side of the power supply 139, and two signal detectors 141 provided at the other end are connected to an electric conductor on the outer periphery of the signal detection ring 109. . The interval between the positions where the two signal detectors 141 are in contact with the signal detection ring 109 is the rotation member 2.
1 is larger than the width L of the notch groove 27. Also, the relay 135, the movable contact 123 and the relay contact 1
37 is connected to the power supply 141 in series.

In the above configuration, when the material W is not mounted on the material supporting portion 47, the left end of the movable contact 123 is pressed upward by the bullet 129, so that the right end of the movable contact 123 is fixed. 127. Therefore, in the electric circuit shown in FIG. 10, the relay 135 is excited, the relay contact 137 is closed, and the current from the power supply 139 is supplied to the resistor via the two signal detectors 141 and the signal detection ring 109. 133
Is formed.

When the material W is mounted on the material support portion 47, the weight of the material W causes the left end of the movable contact 123 to be pushed down against the upward urging force of the bullet 129, and the movable contact 123 And the fixed contact 127 are separated from each other. Therefore, the relay 135 is de-energized, the relay contact 137 is opened, and the power supply 13
The current from 9 stops flowing through the resistor 133.

As described above, the state of whether or not a current is flowing through the resistor 133 is detected by, for example, the presence or absence of a voltage or the presence or absence of a current at both ends of the resistor 133. It is possible to detect whether or not the material W is mounted. In addition, two signal detectors 1
Since the position 41 is provided larger than the width L of the notch groove 27 provided in the rotating member 21, whether the material W is mounted at any position of 360 degrees even while the rotating member 21 is rotating. Can be detected.

When it is detected that the movable contact 123 and the fixed contact are not in contact with each other, air is blown out to the material supporting portion 47 from an air flow path 125 provided substantially at the center of the fixed contact. It is provided in.

[0054]

According to the first to fourth aspects of the present invention, since the power chuck which can be used even during the index processing is provided, the automatic operation can be performed. Further, since the material mounting can be automated, the material mounting time can be significantly reduced as compared with the case of manual operation, and the production efficiency is improved.

According to the fifth aspect of the present invention, even if the mounting position of the material is shifted or deviated during the processing after the mounting of the material, it can be automatically detected. For this reason, it is possible to minimize the occurrence of processing defects.

According to the invention described in claim 6, since the material indexing device can automatically detect material loading even during rotation, the reliability of automatic operation is further improved.

According to the seventh aspect of the present invention, since the material can be accurately mounted on the material supporting portion, the processing accuracy is improved.

[Brief description of the drawings]

FIG. 1 is a front view of an example in which a material indexing device of a laser beam machine according to the present invention is used for an NC laser beam machine.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a first embodiment of a material indexing device for a laser beam machine according to the present invention.

FIG. 4 is a pneumatic circuit diagram according to the first embodiment.

FIG. 5 is a front view of a material rotating member of a second embodiment of the material indexing device of the laser beam machine according to the present invention.

FIG. 6 is a side view of FIG. 5;

FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6;

FIG. 8 is a view showing a material attachment detecting device in a third embodiment of the material indexing device of the laser beam machine according to the present invention.

FIG. 9 is an enlarged detail view of a portion A in FIG. 8;

FIG. 10 is an electric circuit in a material loading detection device according to a third embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 laser processing machine 3 X-axis carriage 5 Y-axis carriage 7 laser processing head 9 nozzle 11 gas laser oscillator 13 (A, B, C) material indexing device 15 body frame 17 base 19 face plate 21 material rotating member 23 support roller 25, 35 rotation Shaft 27 Notch groove 29 Gear 31 Servo motor 33 Drive gear 37 Belt 39 Tension adjusting means 41 Swing arm 43 Rotating shaft 45 Rotating roller 47 Material support 49, 83 Clamp cylinder 50, 52 Press plate 51 Accumulator 53, 59 , 71, 75, 77, 81 Pipeline 55 Pneumatic source 57, 61 Coupling 63, 65 Moving coupling 67 Coupling moving cylinder 69 Coupling holder 73, 79 Electromagnetic directional control valve 85 Accumulator chamber 87 Seal Material 89, 105, 125 Flow path 91 Check valve 93 Fluid pressure cylinder 95 Air supply port 97 Piston rod 99 Ball 101 Spring 103 Discharge port 107 Material loading detector 109 Signal detection ring 111 Material support plate 113 Housing 115 Swing shaft 117 Material contact member 119 Contact member 121 Screw 123 Movable contact 127 Fixed contact 129 Ammunition 131 Hole 133 Resistance 135 Relay 137 Relay contact 139 Power supply 141 Signal detector 142 Pipe joint

Claims (7)

[Claims] 1. A plurality of support rollers for rotatably supporting the outer periphery of a material rotating member are provided on a face plate of a main body frame, and two driving gears provided with gears on the outer periphery of the material rotating member and engaging with the gears are provided. A servo motor is provided on the main body, the material rotating member is provided with a cutout groove shorter than the center distance between the two drive gears, and the face plate is provided with a servomotor for rotationally indexing the material rotating member via the two drive gears. A clamp cylinder for pressing and fixing the material to the material rotating member is provided via an accumulator; a pair of fixed couplings connected to the clamp cylinder and the accumulator are provided on the material rotating member; A pair of movable couplings which are detachably mounted on the main body; A material indexing device for a laser beam machine, wherein the material indexing device is connected to an air source via a laser beam. 2. The material indexing device according to claim 1, wherein the coupling moving means is a hydraulic cylinder. 3. A plurality of support rollers for rotatably supporting an outer periphery of a material rotating member are provided on a face plate of a main body frame, and a gear is provided on an outer periphery of the material rotating member, and two driving gears engaged with the gear are provided. A servo motor is provided on the main body, the material rotating member is provided with a cutout groove shorter than the center distance between the two drive gears, and the face plate is provided with a servomotor for rotationally indexing the material rotating member via the two drive gears. In the provided material indexing device, a spring return type single-acting clamp cylinder for pressing and fixing the material is provided on the material rotating member, and the material rotating member is rotatably adhered to the face plate, and provided on the material rotating member. A C-shaped accumulator chamber over substantially the entire area of the material rotating member is formed on the surface of the face plate on the facing side, and the accumulator chamber is formed from the clamp cylinder. A flow path communicating with the upper part of the accumulator chamber is formed, and a check valve for preventing the outflow of fluid from the clamp cylinder side is provided at an end of the flow path, and the check valve is opened and closed on the face plate side. A material indexing device for a laser beam machine, wherein a free check valve opening / closing means is provided, and the accumulator chamber is connected to a pressure source via a direction control valve. 4. The material indexing device according to claim 3, wherein the pressing means is a hydraulic cylinder. 5. The material indexing device for a laser beam machine according to claim 1, wherein a material loading detecting device for detecting material loading is provided on the material rotating member. 6. The material mounting detecting device is provided on a signal detecting ring that rotates with the material rotating member together with the material rotating member, and on a face plate of a main body frame that contacts the signal detecting ring at a wider interval than the notch groove. Two signal detectors, a contact operated by the mounting of the material on the material rotating member, and an electric circuit provided between the two signal detectors and a power supply, wherein the contact is ON. 6. The apparatus according to claim 5, wherein when the electrical circuit between at least one of the signal detectors and the power supply is turned on, the material mounting is detected.
2. A material indexing device for a laser beam machine according to item 1. 7. The contact comprises a movable contact composed of a material contact member and a contact member, and a fixed contact capable of contacting the movable contact. The movable contact is pivotally supported by the material rotating member. The movable contact is provided with a resilient device that protrudes one side of the movable contact from the material supporting surface, and a fixed contact provided with an air flow path substantially at the center is provided so as to be able to contact the other side of the movable contact, 7. The material indexing device of a laser beam machine according to claim 6, wherein when the contact is in a non-contact state, air is ejected from the fixed contact to the material support.