JPS6153190B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a computer-controlled positioning device for a work table used for positioning a drilling machine or a labor-saving machine. Conventionally, for a workpiece set on a worktable, the hole position is determined in advance through a scribing process, and when a center hole is punched, the workpiece is moved with the hole targeted, or the table drive system is controlled by a computer. The table was controlled and the table was automatically moved to perform processing such as drilling holes and boring. However, in the former case, when there were multiple workpieces, each workpiece had to be marked individually. The marking process takes time and causes variations, making it impossible to achieve uniform processing.

The latter method is accurate and has no variations, but the device itself is very expensive, so it is generally difficult to use due to the cost. In view of such problems, the present invention focuses on low-cost production, and has made it possible to eliminate the inaccurate and time-consuming marking process using a simple method and structure, and without incurring large costs. The device is as follows.

A pair of brake cylinders are mounted parallel to each other on the upper surface of the base, and a sliding cylinder fixed to the lower surface of a movable plate that is manually moved is fitted to a sliding shaft integrally provided at the upper end of each brake cylinder. A pair of brake cylinders are mounted in parallel on the top surface of the movable plate so as to be orthogonal to the above-mentioned sliding shafts, and these brake cylinders are fixed to the bottom surface of the work table, which can be manually moved by sliding shafts provided integrally at the top end of each brake cylinder. Fit the sliding cylinders, attach a pulse transmitter to the base and the movable plate, and connect the outer circumferential surface of the roller provided at the shaft end of the pulse transmitter to the rail provided on the underside of the movable plate or work table. Piston cylinders that are brought into contact with each other and are activated when the movable board or work table reaches a position programmed in the computer in advance by the output of the pulse transmitter are attached to the lower surfaces of the movable board and the work table, respectively, and the piston shafts of the piston cylinders are connected to each other. One end of the link is pivotally supported, and the other end of the link is pivotally connected to a stopper stand provided between the link and the brake body, and a stopper shaft is provided on the stopper stand so as to be slidable by being pressed by a spring. The link is pressed by

Embodiments of the present invention will now be described with reference to the drawings.

In the figure, reference numeral 1 denotes a base, and a pair of brake cylinders 3a, 3a having cylindrical sliding shafts 2a, 2a integrally attached to their upper ends are attached in parallel to the upper surface of the base.

4 is a movable plate, and sliding tubes 5a, 5a,
5a, 5a are fixedly attached, and these sliding tubes 5
a, 5a, 5a, 5a onto the sliding shafts 2a, 2a provided on the base 1, attach stopper plates 6, 6 to both ends of the sliding shafts 2a, 2a, and move the movable plate 4 onto the base 1 in a straight line. It is designed so that it can be moved freely in only one direction. Further, on the upper surface of the movable platen 4, there is a pair of brake cylinders 3 having a cylindrical sliding shaft 2b attached to the upper end.
b, 3b are parallel and a sliding shaft 2 provided on the base 1
It is attached in a direction perpendicular to a and 2a.

7 is a work table, with sliding tubes 5b, 5 on the bottom.
b, 5b, 5b are fixedly attached, and the sliding shafts 2b, 2b provided on the movable platen 4 are fitted, so that it can be moved onto the movable platen 4 in a direction perpendicular to the moving direction of the movable platen 4. There is.

8a and 8b are piston cylinders disposed at the bottom of the work table 7 and the movable plate 4, one end of which is inserted into a groove provided in the fixed base 9 to lock the piston shaft, and the piston shafts 10a and 10b protruding from the other end. the end,
One end is pivoted to the stopper bases 11a, 11b, and the other ends of links 12a, 12b are coupled to each other by being pivoted. Moreover, the brake cylinders 3a, 3b and the link 12a,
The stopper stand 11a provided between the
The stopper shafts 13a, 13b are slidably inserted into the stopper shafts 11b.
Coil springs 14a, 14b having a smaller diameter than the heads of the stopper shafts 13a, 13b are attached to the outer periphery of the stopper shafts 13a, 13b, and the heads of the stopper shafts 13a, 13b are always pressed against the links 12a, 12b.

Reference numerals 15 and 15 refer to rails whose lower end surfaces protrude lower than the movable platen 4 to the side walls of the sliding tubes 5b and 5b attached to the bottom surface of the work table 7, and which extend parallel to the sliding shaft 2b. They are each attached to the bottom in parallel with the sliding shaft 2a.

Reference numerals 16 and 16 indicate pulse generators attached to the movable platen 4 and the base 1, respectively, and rollers 1 are attached to the ends of their shafts.
7 is pivotally mounted, and the peripheral surface of the roller 17 is connected to the rail 1.
It is provided so that it contacts 5.

18 is a computer, a pulse generator 16,
16 and the piston cylinder 8a,
It is connected to the operating part of the switching valve 8b (not shown) and is provided so that the switching operation can be performed in response to a command from the computer 18.

19 is a direction indicator that indicates the direction of the programmed machining position for the next process;
It is attached at a suitable location on the periphery of the

Reference numeral 20 denotes mounting screw holes for attaching this device to a machine tool, which are bored at each corner of the base 1.

Since the present invention is configured as described above, now,
The usage status of this device is as follows. Input the dimensions of the machining position and the program of the machining order into the computer 18 in advance, and
After setting the programmed target workpiece on the work table 7, set the 0 point at the location of the ruler attached to the work table 7 according to the work order, or set the 0 point at the location of the workpiece. If you set the base point and move the work table 7 manually from this point,
Rollers 17, 17 attached to the shaft ends of the pulse generators 16, 16 run while rotating along rails 15, 15 attached to the work table 7 and the movable platen 4, and the movement signals are transmitted to the computer 18.
The computer 18 calculates the amount of movement from the movement signal, and when the computer 18 reaches the preprogrammed position, switches the piston cylinders 8a, 8b, pushes out the piston shafts 10a, 10b of the piston cylinders 8a, 8b, and links. Stopper shaft 1 via 12a, 12b
3a, 13b, and then push in the brake cylinders 3a, 3b.
Positioning is performed by pressing the stopper shafts 13a and 13b, but the work table 7 and movable plate 4
deviate from the programmed predetermined position due to inertia, so after keeping the work table 7 and movable plate 4 in a locked state for several seconds, the piston cylinders 8a and 8b are automatically switched. The piston shafts 10a, 10b move back and the stopper shafts 13a, 13b are pushed back by the coil springs 4, and the lock between the work table 7 and the movable platen 4 is released, so the work table 7 can be moved manually. For example, the computer 18 which has once again caught the machining position by signals from the pulse oscillators 16, 16 immediately switches the piston cylinders 8a, 8b, brakes the machining table 7 and the movable platen 4, and locks them. Since the re-locked position is only slightly away from the initial lock position, it is hardly affected by inertia, and the shift position is within a fraction of a fraction to a few tenths of a second, and the work table is 7 and the movable plate 4 are completely locked, and after the machining at that position is completed, a completion signal is sent to the computer 1.
If you send it to 8, the lock status will be released and the direction indicator 1 will be released.
If the work table 7 is manually moved in the direction of the machining position indicated by 9, the above operation is repeated again to perform positioning.

In the present invention, when the movable platen or work table which is manually moved as described above reaches a position programmed in advance by a computer, a piston cylinder attached to the lower surface of the movable platen or work table operates to move the stopper shaft. By pressing against the brake body, the positioning of the movable platen or work table is automatically performed, so the conventional scribing process can be omitted, resulting in a significant time reduction and accuracy. It is even better than anything that has come before.

In addition, the tolerance range of the program can be increased or decreased as necessary, and it is not only useful for eliminating the marking process, but also for tightening screws in the assembly process and for other labor-saving machine-related purposes. Since it can also be used for a wide range of applications, it can make a great contribution to this industry in the future.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an apparatus according to the present invention. FIG. 2 is a partially cutaway plan view of the same as above. Figure 3 is a side view of the same as above. FIG. 4 is a partially cutaway plan view of the same as the above, and FIG. 5 is a partially cutaway slope view of the same. In the figure, 1 is the base, 2a, 2b are sliding shafts, 3
a, 3b are brake bodies, 4 is a moving board, 5a, 5b
is a sliding tube, 7 is a work table, 8a and 8b are piston cylinders, 10a and 10b are piston shafts,
11a, 11b are stopper stands, 12a, 12b
is a link, 13a and 13b are stopper shafts, 14
a, 14b are coil springs, 15 is a rail,
16 is a pulse generator, 17 is a roller, and 18 is a computer.

Claims (1)

[Claims] 1. A pair of brake cylinders are mounted parallel to each other on the upper surface of the base, and sliding cylinders fixed to the lower surface of a movable plate that is manually moved are fitted to sliding shafts provided integrally at the upper ends of the brake cylinders, respectively. A pair of brake cylinders are mounted in parallel on the upper surface of the movable plate so as to be orthogonal to the sliding shaft, and a pair of brake cylinders are attached to the lower surface of the work table which are manually moved by sliding shafts integrally provided at the upper ends of the brake cylinders. A fixed sliding tube is fitted, a pulse transmitter is attached to the base and a movable board, respectively, and the outer peripheral surface of the roller provided at the shaft end of the pulse transmitter is connected to a rail provided under the movable board or work table. in contact with
Piston cylinders that are activated when the movable board or work table reaches a position programmed in advance by the computer by the output of the above pulse transmitter are attached to the lower surfaces of the movable board and the work table, respectively, and one end is connected to the piston shaft of the piston cylinder. The other end of the pivoted link is pivoted to a stopper stand provided between the link and the brake body, and the stopper stand is provided with a stopper shaft that is slidably pressed by a spring, and the link is pressed by this stopper shaft. A computer-controlled positioning device for the work table.