JP3653857B2 - Table machine for plate processing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a table device equipped in a plate processing machine such as a punch press machine, a laser processing machine, a right angle shear or the like.
[0002]
[Prior art and problems to be solved by the invention]
Conventionally, a table apparatus shown in FIG. 8 is used in a plate material processing machine. This figure shows an example of a punch press, and as a means for feeding the plate material W to the processing position P, a table device 83 is provided which grips the plate material W by the work holder 81 and sends it on the table 82. The table 82 includes a fixed table 82a at the center and slide tables 82b on both sides, and both the slide tables 82b are assembled integrally with the carriage 84 and fed back and forth (in the Y-axis direction). The carriage 84 has a cross slide 85 mounted so as to be movable laterally (X-axis direction), and each work holder 81 is attached to the cross slide 85.
[0003]
In this type of table device 83, since the slide table 82b moves, the entire area of the table 82 can be reduced. However, on the other hand, there are many parts that move together with the carriage 84, the inertia of the whole moving part increases, and the time required for acceleration / deceleration increases. For this reason, it is difficult to improve machining accuracy in high-speed machining. In recent years, plate materials have been processed at higher speeds, and improvement of positioning accuracy when plate material feed is increased is an important issue.
[0004]
In addition to this, a table device of a type in which the entire table is fixedly installed is also used. FIG. 9 shows an example. The carriage 91 includes a carriage unit 91 a that is installed on a pair of rails 93 of the base 92 so as to be movable forward and backward, and an upper frame unit 91 b that is installed on the carriage unit 91 a via a support member 94 and moves above the table 95. Consists of. The carriage 91a is driven forward and backward by a ball screw 96 at the center thereof.
[0005]
In this type of table device 97, since the entire table 95 is fixed, the mass of the moving part is light, and stop positioning during high-speed feeding can be performed with high accuracy. However, since the upper frame portion 91b of the carriage 91 extends in a cantilevered manner from the portion placed on the carriage portion 91a, in order to ensure the rigidity of the upper frame portion 91b, the cross-sectional shape of the upper frame portion 91b is changed. It needs to be bigger. Insufficient rigidity leads to a decrease 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 is increased, and accordingly, the position of the center of gravity is separated from the axis of the ball screw 96 on which the feeding force is applied, so that the moment is increased and smooth feeding is prevented.
[0006]
The present invention solves the above-mentioned problems, and the carriage can be made light and stiff, and the inertia of the movable part is small, so the acceleration / deceleration time is shortened, and the machining speed is further improved. It is an object of the present invention to provide a table device for a plate material processing machine capable of improving accuracy.
[0007]
[Means for Solving the Problems]
In the table processing apparatus of the present invention, the table on which the plate material is placed is fixedly installed, and a long carriage that can be moved back and forth is provided in a direction orthogonal to the forward and backward direction. This carriage is composed of an upper frame that supports the gripping means of the plate material 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 substantially the full width of the table, or may have a length that does not reach the full width.
According to this configuration, since the table is fixedly installed and only the carriage is moved, the inertia of the movable part is reduced. In this case, since the carriage is composed of upper and lower frames, and the lower frame reinforces the upper frame over substantially the entire length, the rigidity of the carriage is ensured even if it has a small cross-sectional shape as a whole. For this reason, the weight of the carriage can be further reduced, the acceleration / deceleration time can be further shortened, and the processing accuracy associated therewith can be expected. In addition, since the upper frame of the carriage is small enough to be lightweight, the position of the center of gravity is lowered, the carriage is stabilized, and the distance between the point where the carriage is fed with a feed screw or the like and the center of gravity is shortened. More stable driving can be expected.
[0008]
In the above structure, almost the same length Satoshi the upper and lower frame of the carriage, are connected by a connecting member in the longitudinal direction a plurality of locations of the upper and lower frames. In particular, it is preferable that both ends and the middle of the upper and lower frames are connected by a connecting member, and the carriage is configured 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.
[0009]
Further, in this configuration, by dividing the table into multiple division table arranged in the direction perpendicular to the moving direction and the moving path of the connecting member a gap between the alignment. Thereby, the movement path | route of a connection member is easily obtained in the intermediate part of a table.
Further, the carriage has a ladder-like front shape in which a lattice-like space through which each of the divided tables can pass during movement is formed between the upper and lower frames and the connecting material .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
An 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 upper and lower turrets 3 are installed on a side face-shaped C-shaped frame 2. A punch driving device 4 for driving a punch tool (not shown) installed on the turret 3 at a machining position P is installed on the upper portion of the frame 2, and the entire frame 2 is covered with a body cover. The punch driving device 4 uses a mechanical device that converts the rotation of the servo motor 4a into a lifting operation by a toggle mechanism, but may be a crank type or a hydraulic type.
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 a 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). And a plurality of work holders 10 which are plate material gripping means attached to the cross slide 9.
[0011]
The table 7 has a rectangular shape spreading to the front and both sides of the turret 3, and the range in which the entire plate material W can be placed even if an arbitrary portion of the plate material W having a predetermined size is at the processing position P. Is provided. The table 7 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. Each division table 7a is divided into a front range a and a rear range b with the machining position P as a substantial boundary, and a general range c is set in front of the front range a. A part of the split table 7a adjacent to one side of the frame 2 is an open / close table 7b, and can be opened and closed up and down by a hinge 12 (FIG. 7B) on one side. By opening the opening / closing table 7b downward, the operator approaches the vicinity of the frame 2 and can easily perform maintenance such as tool change for the turret 3 of FIG. Further, the table 7 is provided with a large number of free bearings 13 distributed over the entire surface so that the plate material W on the table 7 can be smoothly moved back and forth and right and left.
[0012]
The carriage 8 includes an upper frame 8a that guides and supports the cross slide 9 above the table 7, and a lower frame 8b that reinforces the upper frame 8a over substantially the entire length below the table 7. The upper and lower frames 8a and 8b have substantially the same length, and a plurality of positions in the longitudinal direction, in this example, six positions are connected by a plate-shaped connecting member 8c. Thereby, the front shape of the carriage 8 is a ladder shape. That is, the carriage 8 is formed as a lattice space between the upper and lower frames 8a and 8b and the connecting member 8c so that the space through which each divided table 7a can pass during movement is formed. Each connecting member 8 c is provided at a position that coincides with the gap 11 between each divided table 7 a of the table 7, and the gap 11 serves as a movement path of the connecting member 8 c as the carriage 8 advances and retreats.
[0013]
As shown in FIG. 2, the carriage 8 is installed on a plurality of rails 15, 16 installed on the base 5 so as to be able to advance and retract through a guide member 17 formed of a linear motion bearing. Of the rails 15, 16, the two rails 15 are directly installed on both sides of the base 5, and the remaining two rails 16 are respectively installed on the support arms 18 on both sides that extend laterally from the base 5. Has been. The carriage 8 is driven forward and backward by a feed screw 20 made of a ball screw through 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).
6A and 6B 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 support members 8d on both sides near the center of the lower frame 8b, and the central guide member 17 (FIG. 2) is installed on the lower surface thereof.
As shown in FIG. 5, 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), and is driven forward and backward through a motor 21 and a feed screw 22 mounted on the upper frame 8a. Is done. Each work holder 10 sandwiches the end portion of the plate material W between arms that can be opened and closed vertically.
[0014]
The support frame 25 of the table 7 will be described with reference to FIGS. The support arms 18 described above with reference to FIG. 2 extend to both sides of the base 5 three by three in the table front range a of FIG. 1 as shown in FIG. It is inherited. 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 are arranged at the front and rear ends, that is, near the front and rear ends of the table front portion range a (FIG. 1) as shown in FIG. A front and rear frame 28 extending in the direction (X-axis direction) is provided. A large number of table plate support frames 29 extending in the front-rear direction are installed between the upper surfaces of the pair of front and rear frames 28, 28, and the table plate 30 of FIG. 2 is installed on the table plate support frame 29.
[0015]
The table plate 30 and the table plate support 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. The vertical frame 27 is located below the lower frame 8 b of the carriage 8. The upper frame 8a of the carriage 8 is a square pipe as a main material and provided with accessory parts, and the lower frame 8b is constituted by a square pipe.
[0016]
Note that the rear range b of the table 7 does not need to be inserted through the carriage 8 and has an arbitrary support structure. Further, among the free bearings 13 (FIG. 1) of the table 7, those in the table front part range a are retracted to the lowered position as shown in FIG. 7B when the work holder 10 approaches to avoid interference. Further, it can be moved up and down by the lifting mechanism 14. The elevating mechanism 14 includes a lever 14a that supports a free bearing 13, an ascending return spring 14b, and a cam 14c that is provided on the carriage 8 or the cross slide 9 and lowers the lever 14a.
[0017]
According to the table device 6 having this configuration, the plate material W on the table 7 is gripped by the work holder 10, and an arbitrary portion is moved to the processing position P by moving the carriage 8 back and forth and moving the cross slide 9 left and right. In this case, since the table 7 is fixedly installed and only the carriage 8 is moved, the inertia of the movable part is small and the acceleration / deceleration time can be shortened. Further, since the carriage 8 is formed in a ladder shape by connecting the upper and lower frames 8a and 8b with a plurality of connecting members 8c, even if the upper and lower frames 8a and 8b have a small cross-sectional shape, The rigidity of the carriage 8 is ensured even if it extends long in the entire length in the width direction. For this reason, the carriage 8 is further reduced in weight, and it can be expected that the processing accuracy is improved. Further, since the upper frame 8a of the carriage 8 has a small cross section and can be reduced in weight, the position of the center of gravity is lowered, the advancement and retraction of the carriage 8 is stabilized, and the feed force is applied to the carriage 8 by the feed screw 20 and the center of gravity. It is also easy to shorten the distance to the motor, and further stable running can be expected, resulting in low vibration.
Further, since 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, the moving path of the connecting member 8c is obtained in a simple configuration at the intermediate portion of the table 7. be able to. Note that the table 7 only needs to secure the movement path of the connecting member 8c, and is not necessarily divided.
[0018]
【The invention's effect】
In the table 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 that reinforces the upper frame over the entire length below the table, so that the movable part , And the acceleration / deceleration time can be shortened. In addition, the carriage can be light and have high rigidity, so that the processing speed can be further improved and the processing accuracy can be improved. In addition, since the upper frame of the carriage is small enough to be lightweight, the position of the center of gravity is lowered, the carriage is stabilized, and the distance between the point where the carriage is fed with a feed screw or the like and the center of gravity is shortened. More stable driving can be expected.
In particular, substantially the same length Satoshi the upper and lower frames, for the longitudinal direction a plurality of locations of the upper and lower frames and connected by a connecting member, can be easily configured to stuff the highly rigid carriage lightweight.
Further, by dividing the table into a plurality of divided tables arranged via a predetermined gap, the gap, due to the movement path of the connecting member with the advancing and retracting the carriage, simply an intermediate portion of the movement path of the connecting member table can get.
[Brief description of the drawings]
1A is a schematic plan view of a plate processing machine equipped with a table device according to an embodiment of the present invention, FIG. 1B is a schematic cross-sectional view of the table device, and FIG. 1C is a side view of the plate processing machine. FIG.
FIG. 2A is a partially omitted front view mainly showing a table support frame in the table apparatus, and FIG. 2B is a partially broken side view showing the same part slightly enlarged.
FIGS. 3A to 3C are a plan view, a front view, and a side view showing a lower structure of the table support frame, respectively.
FIG. 4 is a plan view showing the table support frame.
FIGS. 5A and 5B are a plan view and a front view showing a relationship between a carriage and a cross slide. FIGS.
FIG. 6 is a plan view and a front view of a carriage.
7A is a side view of a lifting means for a free bearing, and FIG. 7B is an operation explanatory view of an opening / closing 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]
DESCRIPTION OF SYMBOLS 1 ... Plate material processing machine, 5 ... Base, 6 ... Table apparatus, 7 ... Table, 7a ... Dividing table, 8 ... Carriage, 8a ... Upper frame, 8b ... Lower frame, 8c ... Connection member, 9 ... Cross slide, 10 ... Work holder (gripping means), 11 ... gap, 15, 16 ... rail, 17 ... guide member, 18 ... support arm, 25 ... support frame, 27 ... vertical frame, 28 ... front and rear frame, 29 ... table plate support frame, 30 ... Table plate, a ... front range, b ... rear range, P ... processing position, W ... plate material

Claims (1)

A table for placing a plate fixed installation, set a retractable carriage is elongated in the direction perpendicular to the moving direction only, the plurality of divided tables arranged in a direction perpendicular to the moving direction through the table given clearance The carriage is divided into an upper frame that supports the gripping means of the plate material above the table, and a lower frame that reinforces the upper frame over the entire length below the table, and the upper and lower frames of the carriage are substantially omitted. A plurality of longitudinal portions of the upper and lower frames having the same length are connected by connecting members, and a lattice-like space through which each of the divided tables can pass when the carriage is moved is formed between the upper and lower frames and the connecting material. has been, and that of the ladder-like front shape, said predetermined gap, said connection table of the movement path and the plate material processing machine member with the reciprocating carriage Apparatus.

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