JPH09267141A - Table device for finishing machine of metal plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a stop precision with weak inertia in a moving a part, also to make a carriage light weight and have high rigidity, and to make the carriage travel stably with a low vibration. SOLUTION: The table 7 placing the metal plate W is fixed and installed. The carriage 8 movable back and forth, which extends in the orthogonal direction to a moving direction back and forth, is provided. This carriage 8 is constituted in a ladder type of an upper frame 8a supporting a work holder 10 in the upside of the table 7, a lower frame 8b reinforcing the upper frame 8a over almost the whole length in the lower part of the table, and connecting members 8c. The table 7 is divided into plural split tables 7a, and gaps 11 among the rows of the split tables 7a, are made the moving paths of the connecting members 8c of the carriage 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a table device mounted on a plate material processing machine such as a punch press machine, a laser processing machine, or a right angle shear.

[0002]

2. Description of the Related Art Conventionally, a table apparatus shown in FIG. 8 has been used in a plate material processing machine. This figure shows an example of a punch press machine, and as a means for feeding the plate material W to the processing position P, a table device 83 for holding the plate material W by the work holder 81 and feeding it on the table 82 is provided. The table 82 is composed of a fixed table 82a in the center and slide tables 82b on both sides, and both slide tables 82b are assembled together with a carriage 84 and sent forward and backward (Y-axis direction). Carriage 84
Is a cross slide 85 movably mounted laterally (X axis direction), and each work holder 81 is attached to the cross slide 85.

In this type of table device 83, since the slide table 82b moves, the entire area of the table 82 can be small. However, on the other hand, the carriage 8
There are many parts that move together with No. 4, the inertia of the whole moving part is large, and the time required for acceleration / deceleration becomes long. For this reason,
It is difficult to improve the processing accuracy in high-speed processing. In recent years, plate materials are being processed at high speed, and it is an important issue to improve the positioning accuracy when the plate materials are fed at high speed.

In addition to this, conventionally, a table device of a type in which the entire table is fixedly installed is also used. FIG. 9 shows an example thereof. The carriage 91 includes a carriage portion 91a installed on a pair of rails 93 of a base 92 so as to be able to move back and forth.
It is composed of an upper frame portion 91b which is installed on the carriage portion 91a via a support member 94 and moves above the table 95. The trolley portion 91a is driven back and forth by the ball screw 96 at the center thereof.

In the table device 97 of this type, since the entire table 95 is fixed, the mass of the moving part is light, and the stop positioning can be performed with high accuracy during high speed feeding. However, the upper frame portion 91b of the carriage 91 is
Since it extends cantileveredly from the portion mounted on 1a, it is necessary to increase the cross-sectional shape of the upper frame portion 91b in order to secure the rigidity of the upper frame portion 91b. The lack of rigidity leads to a reduction in processing accuracy, and therefore, there is a limit to the weight reduction of the carriage 91. In addition, the position of the center of gravity becomes higher, and accordingly, the position of the center of gravity moves away from the axis of the ball screw 96 that acts on the feed force, increasing the moment and hindering smooth feeding.

The present invention solves the above-mentioned problems, and the carriage can be made lightweight and have high rigidity, and since the inertia of the movable portion is small, the acceleration / deceleration time can be shortened.
It is an object of the present invention to provide a table device of a plate material processing machine that can further improve the processing speed and the processing accuracy.

[0007]

A table device of a plate material processing machine according to the present invention has a table on which a plate material is placed fixedly installed,
A long carriage capable of moving forward and backward is provided in a direction orthogonal to the moving direction. This carriage is composed of an upper frame that supports the plate gripping means above the table, and a lower frame that reinforces the upper frame over substantially the entire length below the table. The carriage may have a length that extends over substantially the entire width of the table, or may have a length that does not reach the full width. According to this configuration, the table is fixedly installed and only the carriage is moved, so that the inertia of the movable portion is reduced. In this case, the carriage is composed of upper and lower frames, and the lower frame reinforces the upper frame over substantially the entire length, so that the rigidity of the carriage is ensured even if it has a small cross section as a whole. Therefore, the weight of the carriage can be further reduced, the acceleration / deceleration time can be further shortened, and the machining accuracy can be expected to be improved accordingly. Also, since the upper frame of the carriage has a small cross section and can be lightened, the position of the center of gravity is lowered, the carriage becomes stable, and the distance between the point where the feed force is given to the carriage by the feed screw etc. and the center of gravity is shortened. You can expect more stable driving.

In the above structure, it is preferable that the upper and lower frames of the carriage have substantially the same length and that the upper and lower frames are connected at a plurality of longitudinal positions by connecting members. In particular, it is preferable that the upper and lower frames are connected at both ends and the middle with a connecting member to form the carriage in a ladder shape. By connecting the upper and lower frames in this manner, the carriage can be easily configured to be lightweight and highly rigid.

Further, in the case of this configuration, it is preferable that the table is divided into a plurality of divided tables and the gap between the rows is used as the movement path of the connecting member. Thereby, the movement path of the connecting member can be easily obtained in the middle portion of the table.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. The plate material processing machine 1 is composed of a punch press machine, and the upper and lower turrets 3 are installed on a frame 2 having a C-shaped side surface. A punch drive device 4 that drives a punch tool (not shown) installed on the turret 3 at the processing position P is installed on the upper part of the frame 2.
Is covered with a fuselage cover. Punch drive 4
Uses a mechanical type in which the rotation of the servo motor 4a is converted into a lifting operation by a toggle mechanism, but a crank type or hydraulic type may be used. A base 5 is installed in front of the frame 2, and a table device 6 is installed on the base 5. The table device 6 includes a fixed table 7 installed on the base 5, a carriage 8 that moves back and forth (Y axis direction), and a cross slide 9 that is mounted on the carriage 8 and moves in the width direction (X axis direction). , A plurality of work holders 10 which are plate material holding means attached to the cross slide 9.

The table 7 has a rectangular shape that spreads forward and on both sides of the turret 3 and has a plate W of a predetermined size.
Even if the arbitrary position is at the processing position P, it is provided over the range in which the entire plate material W can be placed. Table 7 is
It is divided into seven divided tables 7a in the width direction (X direction), and a gap 11 having a predetermined width is formed between the divided tables 7a. Further, each division table 7a is divided into a front range a and a rear range b with the machining position P as a substantially boundary, and a general range c is installed further in front of the front range a. The division table 7a adjacent to one side of the frame 2
Is part of the open / close table 7b, and the hinge 12 is provided on one side.
As shown in FIG. 7 (B), it can be opened and closed vertically. By opening the open / close table 7b downward, the operator approaches the frame 2 and can easily perform maintenance such as tool exchange on the turret 3 of FIG. In addition, the table 7 has a large number of free bearings 1 dispersed over the entire surface.
3 is provided so that the plate material W on the table 7 can be smoothly moved back and forth and left and right.

The carriage 8 comprises an upper frame 8a which guides and supports the cross slide 9 above the table 7, and a lower frame 8b which reinforces the upper frame 8a below the table 7 over substantially the entire length. Upper and lower frames 8
a and 8b have substantially the same length, and a plurality of points in the longitudinal direction, six points in this example, are connected by a plate-shaped connecting member 8c. As a result, the carriage 8 has a ladder-like front shape. That is, in the carriage 8, the spaces through which the respective division tables 7a can pass during movement are formed as lattice-shaped spaces between the upper and lower frames 8a and 8b and the connecting member 8c. Each connecting member 8c is provided at a position that matches the gap 11 between each divided table 7a of the table 7, and the gap 11 serves as a moving path of the connecting member 8c as the carriage 8 advances and retracts.

As shown in FIG. 2, the carriage 8 is installed on a plurality of rails 15 and 16 installed on the base 5 so as to be movable back and forth via a guide member 17 composed of a linear motion bearing. Of the rails 15 and 16, two rails 1
5 are directly installed on both sides of the base 5, and the remaining two rails 16 are installed on support arms 18 on both sides extending laterally from the base 5. Also, the carriage 8
Is driven forwards and backwards by a feed screw 20 formed of a ball screw via a nut attached to a central attachment portion 19 of the lower frame 8b. The feed screw 20 is installed on the base 5 and is rotationally driven by a motor (not shown). FIG.
(A) and (B) show a plan view and a front view of the carriage 8, respectively. As shown in the figure, the carriage 8 is provided with guide supporting members 8d on both sides in the vicinity of the center of the lower frame 8b.
(Fig. 2) is installed. A cross slide 9 is installed on the upper frame 8a of the carriage 8 so as to be movable back and forth in the lateral direction (X-axis direction) as shown in FIG. 5, and is driven forward and backward via a motor 21 and a feed screw 22 mounted on the upper frame 8a. To be done. Each work holder 10 sandwiches the end portion of the plate material W between arms that can be opened and closed vertically.

The support frame 25 of the table 7 will be described with reference to FIGS. The support arms 18 described above with FIG. 2 extend in the table front region a of FIG. 1 by three pieces on both sides of the base 5 as shown in FIG. 3 (A), and each in the longitudinal direction at the intermediate joint portion 18a. It has been inherited. In addition, each support arm 18 is provided with support legs 26 that are grounded to the floor surface at a plurality of locations near the tip and in the middle. A plurality of vertical frames 27 extending in the front-rear direction are provided side by side on the support arm 18, and the width thereof is provided at the front-rear ends thereof, that is, near the front-rear ends of the table front portion range a (FIG. 1) as shown in FIG. The front and rear frames 28 extending in the direction (X-axis direction) are installed. This pair of front and rear frames 2
A large number of table board support frames 29 extending in the front-rear direction are provided between the upper surfaces of the reference numerals 8 and 28, and the table board 30 shown in FIG.

The table plate 30 and the table plate supporting frame 29 are inserted into the space between the upper frame 8a and the lower frame 8b of the carriage 8 as shown in FIG. 2 (B). The vertical frame 27 is located below the lower frame 8b of the carriage 8. The upper frame 8a of the carriage 8 is made of a square pipe as a main material with attached parts, and the lower frame 8b is made of a square pipe.

The rear range b of the table 7 does not need to be inserted into the carriage 8 and has an arbitrary supporting structure. Further, among the free bearings 13 (FIG. 1) of the table 7, those having the table front range a are
As the work holder 10 approaches, ascending / descending mechanism 14 is retracted to the lowered position to avoid interference as shown in FIG. 7 (B).
It can be raised and lowered with. The elevating mechanism 14 includes a lever 14a supporting the free bearing 13, an ascending return spring 14b thereof, and a cam 14c provided on the carriage 8 or the cross slide 9 for lowering the lever 14a.

According to the table device 6 of this construction, the plate material W on the table 7 is gripped by the work holder 10, and the arbitrary position is moved to the processing position P by the forward and backward movement of the carriage 8 and the lateral movement of the cross slide 9. To be made. In this case, since the table 7 is fixedly installed and only the carriage 8 is moved, the inertia of the movable portion is small and the acceleration / deceleration time can be shortened. Further, the carriage 8 is the upper and lower frames 8
Since a and 8b are connected to each other by a plurality of connecting members 8c to form a ladder shape, even if the upper and lower frames 8a and 8b have a small cross-sectional shape, the upper and lower frames 8a and 8b can extend long in the entire width direction of the table 7. Even if there is, the rigidity of the carriage 8 is secured. Therefore, the weight of the carriage 8 is further reduced, and it is expected that the machining accuracy is improved accordingly. Also, the carriage 8
Since the upper frame 8a having a small cross section is sufficient for weight reduction, the position of the center of gravity is lowered, the carriage 8 is stably moved forward and backward, and the distance between the point at which the feed screw 20 gives a feeding force to the carriage 8 and the center of gravity is set. It can be easily shortened, more stable running can be expected, and vibration is reduced. Further, the table 7 is divided into a plurality of divided tables 7a, and the gap 11 between them is used as the moving path of the connecting member 8c of the carriage 8. Therefore, the moving path of the connecting member 8c can be obtained in the middle portion of the table 7 with a simple configuration. be able to. Table 7
Is only required to ensure the movement path of the connecting member 8c, and does not necessarily have to be a divided type.

[0018]

According to the table device of the plate material processing machine of the present invention, the table is fixedly installed, and the carriage is composed of an upper frame above the table and a lower frame for reinforcing the upper frame over substantially the entire length below the table. Since it is configured, the inertia of the movable part is small, and the acceleration / deceleration time can be shortened. In addition, the carriage can be made lightweight and highly rigid,
It is possible to further improve the processing speed and the processing accuracy. Also, since the upper frame of the carriage has a small cross section and can be lightened, the position of the center of gravity is lowered, the carriage becomes stable, and the distance between the point where the feed force is given to the carriage by the feed screw etc. and the center of gravity is shortened. You can expect more stable driving. In particular, when the upper and lower frames have substantially the same length and a plurality of longitudinal positions of the upper and lower frames are connected by connecting members, the carriage can be easily configured to be lightweight and highly rigid. Further, when the table is divided into a plurality of divided tables arranged side by side with a predetermined gap and the gap is used as the movement path of the connecting member due to the advance / retreat of the carriage, the movement path of the connecting member is easily located in the middle portion of the table. Can be obtained.

[Brief description of drawings]

FIG. 1A is a schematic plan view of a plate material processing machine equipped with a table device according to an embodiment of the present invention, FIG. 1B is a schematic sectional view of the table device, and FIG. 1C is a side view of the plate material processing machine. It is a figure.

FIG. 2A is a partially omitted front view mainly showing a table support frame in a table device, and FIG. 2B is a partially cutaway side view showing the same part slightly enlarged.

3A to 3C are a plan view, a front view, and a side view, respectively, showing a lower structure of the table support frame.

FIG. 4 is a plan view showing the table support frame.

5A and 5B are a plan view and a front view showing a relationship between a carriage and a cross slide.

FIG. 6 is a plan view and a front view of a carriage.

7A is a side view of the elevating / lowering means of the free bearing, and FIG. 7B is an operation explanatory view of the open / close table.

FIG. 8 is a plan view of a conventional example.

FIG. 9 is a cutaway front view of another conventional example.

[Explanation of symbols]

1 ... Plate processing machine, 5 ... Base, 6 ... Table device, 7 ...
Table, 7a ... Division table, 8 ... Carriage, 8a
... upper frame, 8b ... lower frame, 8c ... connecting member, 9
... Cross slide, 10 ... Work holder (grasping means),
11 ... Gap, 15, 16 ... Rail, 17 ... Guide member,
18 ... Support arm, 25 ... Support frame, 27 ... Vertical frame, 28 ... Front / rear frame, 29 ... Table plate support frame, 30 ... Table plate, a ... Front range, b ... Rear range, P ... Processing position, W ... Plate material

Claims (3)

[Claims] 1. A table on which a plate material is placed is fixedly installed, and a long carriage capable of advancing and retracting in a direction orthogonal to the advancing and retracting direction is provided, and the carriage is an upper frame for supporting a gripping means of the plate material above the table. A table device for a plate processing machine, which comprises a lower frame that reinforces the upper frame over substantially the entire length below the table. 2. The table device for a plate material processing machine according to claim 1, wherein the upper and lower frames of the carriage have substantially the same length, and a plurality of longitudinal positions of the upper and lower frames are connected by connecting members. 3. A table for a plate material processing machine according to claim 2, wherein the table is divided into a plurality of divided tables arranged side by side with a predetermined gap, and the gap is used as a movement path of the connecting member accompanying the advance / retreat of the carriage. apparatus.