JP2003260584A - Plate machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plate machine which can improve positioning accuracy and machining accuracy by, in a shaft driving part comprising a rack and a pinion, facilitating the regulation of backlash and realizing smooth operation in a backlash-free state and absorbing a parallel slippage caused in use in a two-axis parallel state. <P>SOLUTION: This plate machine includes a shaft driving part comprising a rack 18 and a pinion 17. The rack 18 or the pinion 17 is formed of a plurality of rack members or pinion members. The individual members are mounted through an elastic mechanism in such a state that phases are shifted from each other. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate material processing machine, and more particularly to a plate material processing machine such as a laser processing machine, a plasma processing machine, and a turret punch press equipped with a shaft drive unit composed of a rack and a pinion.

[0002]

2. Description of the Related Art Conventionally, in a plate material processing machine such as a laser processing machine, a plasma processing machine, a turret punch press, etc., a shaft drive section composed of a rack and a pinion is provided.

For example, as shown in FIG. 10, in an optical axis moving type laser processing machine, a rack 40 is provided on one side of a processing table 45, and a carriage having a processing head 44 mounted on the rack 40. A pinion 41 rotatably attached to the gear 42 meshes with it.

With this configuration, when the servomotor Mx is driven to rotate the pinion 41, the pinion 41 rolls on the rack 40, so that the carriage 42 moves in the X-axis direction and the servomotor My. Drive
When the ball screw 43 is rotated, the processing head 44 screwed onto the ball screw 43 moves in the Y-axis direction on the carriage 42 while irradiating the work W with the laser beam.

In this case, the rack 40 and the pinion 41 are
If the backlash between them is appropriate, the two mesh well and the shaft drive section consisting of the rack 40 and the pinion 41 operates smoothly.

Thereby, for example, as shown in the drawing, the work W is cut and processed along the circle α, and the disk W1 is cut out.

[0007]

However, in the above-mentioned conventional technique (FIG. 10), it is difficult to adjust the backlash, so that the rack 40 and the pinion 41 do not mesh well and the servomotor Mx is overloaded. May become.

As a result, the cut surface of the disc W1 is not smooth but wavy (enlarged view β), and the disc W1 has no value as a product.

That is, if the backlash between the rack 40 and the pinion 41 is not proper, the two do not mesh with each other, the shaft drive section comprising the rack 40 and the pinion 41 does not operate smoothly, and the positioning accuracy of the carriage 42 deteriorates. .

Therefore, the consistency between the speed of the carriage 42 (X-axis direction) and the speed of the processing head 44 (Y-axis direction) is lost, and the cutting shape by the laser beam emitted from the processing head 44 is a circle α. As a result, the disc W1 is distorted, and as described above, the disc W1 having a corrugated (enlarged view β) cut surface is cut out, and the processing accuracy is reduced.

On the other hand, when the shaft drive unit comprising the rack 40 and the pinion 41 is used in a two-axis parallel state (for example, the rack 40 and the pinion 41 shown in FIG. 10 are also provided on the left side of the carriage 42), the parallel state. If there is a deviation, the backlash between the rack 40 and the pinion 41, which was initially proper, may increase or, on the contrary, decrease.

As a result, as described above, the rack 40 and the pinion 41 do not mesh well, and the servo motor Mx
May be overloaded, and similarly, the carriage 42 driven by the shaft drive unit including the rack 40 and the pinion 41.
And the disk W1 having a corrugated (enlarged view β) cutting surface is cut out, resulting in a reduction in processing accuracy.

An object of the present invention is to facilitate adjustment of backlash in a shaft drive unit composed of a rack and a pinion,
The positioning accuracy and the processing accuracy are improved by enabling smooth operation without the backlash and absorbing the parallel deviation when used in the two-axis parallel state.

[0014]

In order to solve the above problems, the present invention is directed to a plate material processing machine having an (A) rack 18 and a shaft drive unit composed of a pinion 17, as shown in FIGS. , (B) the rack 18 or the pinion 17
However, the technical means of the plate material processing machine is characterized in that it is constituted by a plurality of rack members or pinion members, and each member is attached via an elastic mechanism while being out of phase with each other.

According to the present invention, for example, the pinion 17
(FIG. 1) is composed of a first pinion 17A and a second pinion 17B, and both pinions 17A and 17B (FIG. 2) are coaxial A
These are mounted rotatably on top of each other and are biased by respective built-in springs 28 (FIG. 3 (B)) in a state where the phases in the angular directions are shifted from each other (phase difference θ (FIG. 4)).
And a rack 18, for example, a carriage 1
6 (FIGS. 1 and 2).

As a result, the backlash can be adjusted simply by shifting the phase of both pinions 17A and 17B (FIG. 4), which facilitates the adjustment of the backlash, and by shifting the phase in this way, By engaging only one of the pinions 17A or 17B with the rack 18, the carriage 16 can be moved to the right or left, and the pinion 17 as a whole can be smoothly operated without backlash with the rack 18. In addition, even when the shaft drive unit composed of the rack 18 and the pinion 17 is used in a two-axis parallel state, when a parallel displacement occurs, it is fixed by the spring 28 (FIG. 3 (B)). Can be absorbed.

Therefore, the rack 18 and the pinion 17 are engaged with each other so that the positioning accuracy of the carriage 16 moving in the X-axis direction (FIG. 2) is improved, whereby the speed of the carriage 16 (X-axis direction). And the speed (Y-axis direction) of the processing head 26 are maintained, and the disk W1 having a cut surface along the smooth circle α is cut out from the work W, and the processing accuracy is improved. .

That is, according to the present invention, in the shaft drive unit composed of the rack and the pinion, the backlash can be easily adjusted, the smooth operation can be performed without the backlash, and the parallelism when used in the two-axis parallel state can be achieved. By absorbing the deviation, it is possible to improve the positioning accuracy and the processing accuracy.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to the accompanying drawings by way of embodiments.

FIG. 1 is an overall view of an embodiment of the present invention,
The illustrated example is an optical axis movement type laser processing machine.

The laser beam machine has a machining table 9 on which a work W is placed, and a guide base 13 and a rail base 23 having the same length in the X-axis direction as those of the machining table 9 are provided on both sides of the machining table 9. There is.

These guide base 13 and processing table 9
A carriage 16 is provided across the rail base 23 and extending in the Y-axis direction.

One of the carriages 16 is attached to the X-axis guide 12 laid on the guide base 13, and the other is attached to the X-axis rail 10 laid on the rail base 23.
Are slip-coupled to each other.

A rack 18 is provided on the side surface of the guide base 13.
The pinion 17 rotated by an X-axis motor Mx (for example, a servomotor) attached to the carriage 16 is meshed with the rack 18, and the shaft drive unit is configured by this (FIGS. 3 and 4 ( First Embodiment), FIG.
FIG. 6 (second embodiment), FIG. 7, FIG. 8 and FIG. 9 (third embodiment)).

Further, a Y-axis guide 22 is laid on the front surface of the carriage 16 (FIG. 1), and the Y-axis slider 5 is slidably coupled to the Y-axis guide 22, and the Y-axis slider 5 is processed. A head 26 is attached.

On the upper surface of the carriage 16, a Y-axis motor M
A ball screw 8 that is rotated by y (for example, a servomotor) is provided, and the ball screw 8 has a Y of the processing head 26.
The shaft slider 5 is screwed.

With this configuration, the NC device 20 controls the X-axis motor Mx and the Y-axis motor My (control signals S1 and S2) to move the carriage 16 in the X-axis direction on the carriage 16. 26 is moved in the Y-axis direction respectively, and the machining head 26 is driven in the Z-axis direction (control signal S3) to irradiate the work W with a laser beam, for example, to perform cutting along the circle α (FIG. 2). It is designed to go and cut out the disk W1.

In such a laser beam machine, the details of the shaft drive portion comprising the rack 18 and the pinion 17 are shown in FIG. 3, for example.

In FIG. 3, the carriage 16 includes
The axis drive unit is mounted via the carriage connection unit 25, and X
The rotational movement of the shaft motor Mx is reduced by the speed reducer 29 and transmitted to the pinion 17, and the rotational movement of the pinion 17 is
The rack 18 meshing with it converts it into a linear motion, and as described above, the carriage 16 moves in the X-axis direction (FIGS. 1 and 2).

The pinion 17 is the first pinion 17A.
And the second pinion 17B.
A and 17B are rotatably attached on the coaxial A (FIG. 3 (B)).

The first pinion 17A and the second pinion 1
7B has a built-in elastic mechanism, for example, a spring 28, by which both pinions 17A, 17B are biased in the longitudinal direction (X-axis direction), and each pinion 17A, 1B.
A predetermined pressure is applied to 7B.

Furthermore, the pinions 17A and 17B (FIG. 4) are out of phase with each other in the angular direction about the coaxial A, for example, and the phase difference between them is, for example, θ.

That is, both pinions 17A and 17B are rotatably attached on the coaxial A as described above, and for example, the first pinion 17A and the second pinion 1 are attached.
As shown in the drawing, the phase of 7B is shifted by θ, and in the state in which the phase is shifted, both pinions 17A and 17B are urged by a spring 28 (FIG. 3B).

Therefore, according to the present invention, both pinions 17
The backlash between the rack 18 and the rack 18 can be adjusted only by shifting the phases of A and 17B, which facilitates the adjustment of the backlash.

In this case, without incorporating the spring 28, for example, a bolt for phase adjustment is attached, and after adjusting the phase of both pinions 17A and 17B with the bolt loosened,
Since the phase can be shifted only by tightening the bolts and fixing them, the backlash can be adjusted more easily.

Then, instead of the spring 28, the first pinion 17A and the second pinion 17A are connected via a pneumatic or hydraulic cylinder.
Attach the pinion 17B, each pinion 17A, 17B
Can be applied with a predetermined pressure.

Further, by adjusting the backlash in this way, the pinion 17 as a whole can smoothly operate without backlash with the rack 18.

That is, when the X-axis motor Mx is rotated counterclockwise in the state of FIG. 4, the entire pinion 17 also rotates in the same direction.

However, at this time, only the first pinion 17A arranged above meshes with the rack 18 and rolls to the right by pressing it, so that this rack 1
Carriage 1 by the action of the first pinion 17A meshing with
6 can be moved to the right.

When the X-axis motor Mx is rotated clockwise in the state shown in FIG. 4, the entire pinion 17 also rotates in the same direction.

However, at this time, only the second pinion 17B arranged below meshes with the rack 18 and rolls to the left by pressing it, so that the action of the second pinion 17B meshing with the rack 18 acts. The carriage 16 can be moved to the left.

Therefore, as described above, the pinion 17 as a whole can operate smoothly without backlash with the rack 18.

Further, when the shaft drive portion comprising the rack 18 and the pinion 17 shown in FIG. 3 is used in a two-axis parallel state (for example, the rack 18 and the pinion 17 in FIG. 3 are provided on both sides of the carriage 16). , The two pinions 17 are connected by a timing belt or the like for synchronous rotation), and even if parallel displacement occurs, it can be absorbed by the spring 28.

Therefore, by taking the above-mentioned means, according to the present invention, the rack 18 and the pinion 17 are engaged with each other exactly, and the positioning accuracy of the carriage 16 which moves in the X-axis direction (FIG. 2) is improved. Therefore, the consistency between the speed of the carriage 16 (X-axis direction) and the speed of the processing head 26 (Y-axis direction) is maintained, and the disc W1 having a smooth cutting surface along the circle α. Is cut out from the work W, and the processing accuracy is improved.

FIG. 5 is a diagram showing a second embodiment of the present invention, in which the pinion 17 is different from the first pinion 17A in FIG.
The second pinion 17B is the same as the second pinion 17B, but the two pinions 17A and 17B are different from each other in that they are rotatably mounted on the different axes B and C synchronously.

In FIG. 5, the first pinion 17A is X
The second pinion 17B is attached to the shaft motor Mx side.
Are attached with a predetermined distance in the longitudinal direction (X-axis direction) via the mounting plate 30 (FIGS. 5B and 5C).

The first pinion 17A and the second pinion 1
7B are connected by a belt 27, for example, a timing belt, whereby both pinions 17A and 17B are
It is designed to rotate synchronously on the mounting plate 30.

Further, a spring 28 is wound around the first pinion 17A and the second pinion 17B (FIG. 5 (B)), whereby both the pinions 17A and 17B are moved in the longitudinal direction (X-axis direction). Energized, each pinion 17A, 17
A predetermined pressure is applied to B.

Further, the pinions 17A and 17B (FIG. 6) are out of phase with each other in the longitudinal direction (X-axis direction), and the phase difference between them is L, for example.

That is, both pinions 17A and 17B are connected by the timing belt 27 and are rotatably attached in synchronization on the different axes B and C, as described above.
For example, for the first pinion 17A, the second pinion 17B
As shown in the drawing, the phase is shifted by L, and in the state in which the phase is shifted, both pinions 17A and 17B are biased by the spring 28.

Therefore, according to this second embodiment, the first
Similar to the embodiment (FIG. 3), both pinions 17A, 17B
Since the backlash with the rack 18 can be adjusted only by shifting the phase of, the backlash can be easily adjusted.

Further, by adjusting the backlash in this manner, the pinion 17 as a whole can smoothly operate without backlash with the rack 18.

That is, when the X-axis motor Mx is rotated counterclockwise in the state of FIG. 6, the first pinion 17A coupled to the X-axis motor Mx rotates in the same direction, and its rotational movement is the timing belt. 2nd pinion 17B via 27
And the second pinion 17B also rotates in the same direction.

However, at this time, as shown in the drawing, only the second pinion 17B on the right side meshes with the rack 18 and rolls to the right by pressing it, so the second pinion 17B meshing with the rack 18 is engaged. By the action of
The carriage 16 can be moved to the right through the first pinion 17A that rotates synchronously on the left side.

When the X-axis motor Mx is rotated in the clockwise direction in the state of FIG. 6, the first pinion 17A also rotates in the same direction, and the rotational movement is caused by the timing belt 2.
It is transmitted to the second pinion 17B via 7, and the second pinion 17B also rotates in the same direction.

At this time, however, as shown in the drawing, only the first pinion 17A on the left side meshes with the rack 18 and rolls to the left by pressing it, so that the first pinion 17A meshing with this rack 18 is engaged. By the action of
The carriage 16 can be moved to the left with the second pinion 17B that rotates synchronously on the right side.

Therefore, as described above, the pinion 17 as a whole can operate smoothly without backlash with the rack 18.

Further, the rack 18 and the pinion 1 shown in FIG.
When the shaft driving unit composed of 7 is used in the two-axis parallel state, as in the case of FIG. 3, even if the parallel displacement occurs, it can be absorbed by the spring 28.

FIG. 7 is a diagram showing a third embodiment of the present invention. In FIG. 3 (first embodiment) and FIG. 5 (second embodiment), the rack 18 side is the first rack 18A and the first rack 18A. 2 racks 1
8B is remarkably different.

That is, in FIG. 7, the rack 18 is composed of, for example, a first rack 18A arranged above and a second rack 18B arranged below, and both racks 18A, 1A.
Either one of 8B is attached so as to be slightly displaceable in the longitudinal direction (X-axis direction), and the phases of both are shifted in the longitudinal direction as described later (FIG. 8).

Similarly, for example, a spring 28 (see FIG. 7) is provided on the first rack 18A and the second rack 18B.
(B)) It is built in, so that both racks 18
A and 18B are biased in the longitudinal direction (X-axis direction), and a predetermined pressure is applied to each rack 18A and 18B.

Further, the racks 178 and 18B (FIG. 8) have their phases shifted in the longitudinal direction as described above, and the phase difference between them is, for example, M.

Alternatively, both the first rack 18A and the second rack 18B are attached so as to be slightly displaceable in the direction (Y-axis direction) orthogonal to the longitudinal direction (X-axis direction), as will be described later. , One of the racks 18B or 18A is slightly displaced toward the pinion 17 side due to the difference in the moving direction of the carriage 16 (FIG. 9A or FIG. 9B), and the phase of both racks 18A and 18B is Y-axis. It is designed to shift in the direction.

In this case also, both racks 18A, 18B have springs 28 (orientated in the Y-axis direction in FIG. 7) incorporated therein, so that both racks 18A, 1B are mounted.
8B is urged in the Y-axis direction, and each rack 18A, 18B
Is applied with a predetermined pressure.

Further, in this case, both racks 18A, 1
8B (FIG. 9) has a phase shift in the Y-axis direction as described above, and the phase difference between them is N, for example.

That is, the racks 18A and 18B are in the longitudinal direction (FIG. 8) or in the direction orthogonal to the longitudinal direction (FIG. 9).
Are deviated in phase from each other and are biased by the springs 28 incorporated therein.

Therefore, according to the third embodiment, it is only necessary to shift the phases of the racks 18A and 18B.
Since the backlash between 7 and 7 can be adjusted, similarly, the backlash can be easily adjusted.

Further, by adjusting the backlash in this way, the rack 18 as a whole can smoothly operate without backlash with the pinion 17.

That is, as shown in FIG. 8, for example, the lower second rack 18B is slightly displaced to the left and the phase relative to the upper first rack 18A is shifted by M, and in this state, the X-axis motor Mx is reversed. When rotated in the clockwise direction, the pinion 17 also rotates in the same direction.

However, at this time, as shown in the drawing, the pinion 17 meshes only with the upper first rack 18A and rolls to the right by pressing it, so that the pinion 17 meshes with the first rack 18A. By the action of, the carriage 16 can be moved to the right.

When the X-axis motor Mx is rotated clockwise in the state shown in FIG. 8, the pinion 17 also rotates in the same direction.

However, at this time, as shown in the drawing, the pinion 17 meshes only with the lower second rack 18B and rolls to the left by pressing it, so that the pinion 17 meshes with the second rack 18B. By the action of, the carriage 16 can be moved to the left.

Therefore, as described above, the rack 18 as a whole can operate smoothly without backlash between the rack 18 and the pinion 17.

On the other hand, in the case of FIG. 9, due to the difference in the moving direction of the carriage 16 (FIG. 9 (A) or FIG. 9 (B)),
This is different from the case of FIG. 8 in that both racks 18B or 18A are slightly displaced toward the pinion 17 side to shift the phase (phase difference N).

That is, as shown in FIG. 9A, for example, the lower second rack 18B is slightly displaced to the pinion 17 side, and the phase relative to the upper first rack 18A is shifted by N,
When the X-axis motor Mx is rotated counterclockwise in this state, the pinion 17 also rotates in the same direction.

At this time, however, as shown in the drawing, the pinion 17 meshes only with the lower second rack 18B and rolls to the right by pressing it, so that the pinion 17 meshes with the second rack 18B. By the action of, the carriage 16 can be moved to the right.

In this way, after moving the carriage 16 to the right and immediately before reversing it to the left, this time, as shown in FIG.
As shown in (B), the lower second rack 18B is returned to its original position, and the upper first rack 18A is slightly displaced to the pinion 17 side, so that the phase of the lower second rack 18B is the same. It is shifted by N.

When the X-axis motor Mx is rotated clockwise in this state, the pinion 17 also rotates in the same direction.

However, at this time, as shown in the figure, the pinion 17 meshes with only the upper first rack 18A and rolls to the left by pressing it, so that the pinion 17 meshes with the first rack 18A. By the action, the carriage 16 can be moved to the left.

Therefore, as in FIG. 8, the rack 18 as a whole can operate smoothly without backlash between the rack 18 and the pinion 17.

Further, the rack 18 and the pinion 1 shown in FIG.
Similarly, when the shaft drive unit composed of 7 is used in a two-axis parallel state, even if parallel displacement occurs, it can be absorbed by the spring 28.

The operation of the present invention having the above configuration will be described below.

In this case, for example, in the laser processing machine (FIG. 1), the X-axis motor Mx is controlled by controlling the NC device 20.
And driving the Y-axis motor My (control signals S1, S2),
While moving the carriage 16 in the X-axis direction and the processing head 26 in the Y-axis direction on the carriage 16,
The machining head 26 is driven in the Z-axis direction (control signal S
3), irradiating the work W with a laser beam to circle α (Fig. 2)
It is assumed that the disk W1 is cut out by cutting along the line.

Hereinafter, the operation of the shaft drive unit including the rack 18 and the pinion 17 for moving the carriage 16 in the X-axis direction will be described in detail.

(1) Operation of the first embodiment (FIGS. 3 and 4).

In the case of the first embodiment, as described above, the pinion 17 (FIG. 3) has the first pinion 17A and the second pinion 17B rotatably mounted on the coaxial A.
And the phases of both pinions 17A and 17B (FIG. 4) are shifted in the angular direction by, for example, θ.

When the X-axis motor Mx is rotated counterclockwise, for example, in this state, the entire pinion 17 also rotates in the same direction, and at this time, only the upper first pinion 17A meshes with the rack 18.

As a result, the first pinion 17A rolls to the right by pressing the rack 18, and the carriage 16 moves to the right due to the action of the first pinion 17A meshing with the rack 18.

Thereafter, when the carriage 16 is reversed, when the X-axis motor Mx is rotated in the clockwise direction, the entire pinion 17 also rotates in the same direction, and at this time, only the second pinion 17B below the rack 18 is moved. Mesh with each other.

As a result, the second pinion 17B rolls leftward by pressing the rack 18, so that the carriage 16 moves leftward by the action of the second pinion 17B meshing with the rack 18.

(2) Operation of the second embodiment (FIGS. 5 and 6).

In the case of the second embodiment, as described above, the pinion 17 (FIG. 5 (B)) and the first pinion 17A mounted rotatably in synchronization on the different axes B and C are provided. It is composed of the second pinion 17B, and both pinions 17A, 1
The phase of 7B (FIG. 6) is shifted by, for example, L in the longitudinal direction (X-axis direction).

When the X-axis motor Mx is rotated counterclockwise, for example, in this state, both pinions 17A and 17B are rotated counterclockwise synchronously via the timing belt 27. Only the second pinion 17B meshes with the rack 18.

As a result, the second pinion 17B rolls to the right by pressing the rack 18, so that the carriage 16 moves to the right by the action of the second pinion 17B meshing with the rack 18.

Thereafter, when the carriage 16 is reversed, when the X-axis motor Mx is rotated clockwise, both pinions 17A and 17B also rotate synchronously in the clockwise direction. Only one pinion 17A meshes with the rack 18.

As a result, the first pinion 17A rolls leftward by pressing the rack 18, and the carriage 16 moves leftward by the action of the first pinion 17A meshing with the rack 18.

As described in (1) and (2) above, either one of the pinions 17A (17B) or 17B (17) is used.
Since the carriage 16 can be moved to the right or left by engaging only A) with the rack 18, the pinion 17 as a whole operates smoothly without backlash with the rack 18. Carriage 16
Can be positioned with high accuracy.

(3) Operation of the third embodiment (FIGS. 7 and 8)
(Figure 9).

In the case of the third embodiment, the rack 18 (FIG. 7) is composed of a first rack 18A and a second rack 18B, and the phases of both racks 18A and 18B (FIGS. 8 and 9) are long. For example, M or N is deviated in the direction (X-axis direction) or the direction (Y-axis direction) orthogonal thereto.

(3) -A phase is in the longitudinal direction (X-axis direction)
Operation when M is deviated by (FIG. 8).

In FIG. 8, when the X-axis motor Mx is rotated counterclockwise, for example, the pinion 17 also rotates in the same direction, and at this time, the pinion 17 moves above the first rack 18a.
It only engages A.

As a result, the pinion 17 rolls to the right by pressing the first rack 18A, and the carriage 16 moves to the right by the action of the pinion 17 that meshes with the first rack 18A.

After that, when the carriage 16 is reversed, when the X-axis motor Mx is rotated clockwise, the pinion 17 also rotates in the same direction. At this time, the pinion 17 is rotated.
Engages only with the second rack 18B below.

As a result, the pinion 17 rolls leftward by pressing the second rack 18B, so that the carriage 16 moves leftward by the action of the pinion 17 meshing with the second rack 18B.

(3) -B Operation when the phase is shifted by N in the direction orthogonal to the longitudinal direction (Y-axis direction) (FIG. 9).

Operation for moving the carriage 16 to the right (FIG. 9 (A)).

In FIG. 9A, the second lower rack 18 is provided.
B is slightly displaced to the pinion 17 side, and the first rack 1 above
The phase for 8A is shifted by N, and in this state,
For example, when the X-axis motor Mx is rotated counterclockwise,
The pinion 17 also rotates in the same direction, and at this time, the pinion 1
7 meshes only with the second rack 18B below.

As a result, the pinion 17 rolls to the right by pressing the second rack 18B, so that the carriage 16 moves to the right by the action of the pinion 17 meshing with the second rack 18B.

Operation when the carriage 16 is moved to the left (FIG. 9B).

In FIG. 9B, immediately before the carriage 16 is reversed to the left, the lower second rack 18B is returned to its original position and the upper first rack 18A is slightly displaced to the pinion 17 side. , The phase with respect to the lower second rack 18B is shifted by N.

When the X-axis motor Mx is rotated clockwise in this state, the pinion 17 also rotates in the same direction, and at this time, the pinion 17 meshes only with the upper first rack 18A.

As a result, the pinion 17 rolls leftward by pressing the first rack 18A, and the carriage 16 moves leftward by the action of the pinion 17 that meshes with the first rack 18A.

As described in (3) -A and (3) -B, either one of the racks 18A (18B) or 18B is used.
By engaging only (18A) with the pinion 17, the carriage 16 can be moved to the right or left, so that the rack 18 as a whole operates smoothly without backlash with the pinion 17. The carriage 16 can be positioned with high accuracy.

In the present embodiment, the case where the shaft driving unit composed of the rack 18 and the pinion 17 is applied to the laser processing machine has been described in detail, but the present invention is not limited to this and other embodiments are possible. It is also applied to a plate processing machine such as a plasma processing machine and a turret punch press (for example, when the shaft drive part of a carriage equipped with a clamp for gripping a work is composed of a rack 18 and a pinion 17) and the like, and the same action and effect are obtained. Of course to play.

[0115]

As described above, according to the present invention, the backlash in the shaft drive portion composed of the rack and the pinion can be easily adjusted, and the backlash can be smoothly operated without the backlash. By absorbing the parallel deviation in the case of performing, there is an effect that the positioning accuracy and the processing accuracy are improved.

[0116]

[Brief description of drawings]

FIG. 1 is an overall perspective view showing an embodiment of the present invention.

FIG. 2 is an overall plan view showing an embodiment of the present invention.

FIG. 3 is a diagram showing a first embodiment of the present invention.

FIG. 4 is an operation explanatory diagram of FIG. 3;

FIG. 5 is a diagram showing a second embodiment of the present invention.

FIG. 6 is an operation explanatory diagram of FIG. 5;

FIG. 7 is a diagram showing a third embodiment of the present invention.

FIG. 8 is an operation explanatory diagram of FIG. 7;

9 is another operation explanatory diagram of FIG. 7. FIG.

FIG. 10 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

5 Y-axis slider 8 Y-axis ball screw 9 Processing table 9 10 X-axis rail 12 X-axis guide 13 Guide base 16 carriage 17 pinion 17A 1st pinion 17B Second pinion 18 racks 18A 1st rack 18B 2nd rack 20 NC device 21 wheels 22 Y-axis guide 23 Rail base 25 Carriage connection 26 Processing head 28 springs 29 reducer 30 mounting plate W work

Claims (5)

[Claims] 1. A plate material processing machine having a shaft drive unit composed of a rack and a pinion, wherein the rack or the pinion is composed of a plurality of rack members or pinion members, and the members are elastic mechanisms in a state of being out of phase with each other. A plate material processing machine characterized by being installed via. 2. The pinion comprises a first pinion and a second pinion, both pinions being rotatably mounted coaxially or rotatably synchronously on different axes. The plate material processing machine according to 1. 3. The pinions, when the two pinions are rotatably mounted on the same axis, are biased by respective built-in springs in a state in which the phases in the angular directions are deviated from each other. Plate material processing machine. 4. When the two pinions are rotatably mounted on different shafts in synchronization with each other, they are connected by a belt and are out of phase with each other in the longitudinal direction. The plate material processing machine according to claim 2, wherein the plate material processing machine is biased by a spring wound around. 5. The rack is composed of a first rack and a second rack, and both racks are biased by respective built-in springs in a state where their phases are out of phase with each other in a longitudinal direction or a direction orthogonal to the longitudinal direction. The plate material processing machine according to claim 1.