Numerical control point-by-point compensation mechanism of bending machine

Abstract

A numerical control point-by-point compensation mechanism of a bending machine, comprising a base (1), wherein push rod supports (4) are arranged in a recess (2) of the base (1); a fixed end of each electric push rod (3) is installed on the corresponding push rod support (4) by means of a hinge pin (8), and a moving end of the electric push rod (3) is hingedly connected to a corresponding lower inclined block (6) by means of a hinge pin (8); the lower inclined blocks (6) are located in the recess (2) and can move in the length direction of the recess (2), and an upper inclined block (5) is located above each lower inclined block (6); vertical guide slots (9) located on two sides of the recess (2) are formed in the upper end face of the base (1); both ends of each upper inclined block (5) are respectively provided with guide cylindrical pins (7); sensor supports (10) are arranged on the outer wall of one side of the base (1), and a displacement sensor (11) is arranged on each sensor support (10); a moving slot (12) is formed in the outer wall of one side of the base (1), a sensor bracket (13) is fixedly arranged on the side surface of each lower inclined block (6), and the sensor bracket (13) passes through the moving slot (12) and is connected to the moving end of the corresponding displacement sensor (11) by means of an adjustable connecting shaft.

Description

A CNC point-by-point compensation mechanism for a bending machine Technical Field

[0001] The present invention relates to a compensation mechanism, in particular to a numerically controlled point-by-point compensation mechanism for a bending machine, and belongs to the technical field of bending machines. Background Art

[0002] The mechanical compensation on the existing bending machine is: 1) composed of a reduction motor, a screw, a base, a pull rod, an upper cover plate, an arc pad, a wedge block and a spacer sleeve; 2) each group of wedge blocks is placed longitudinally, and a longitudinal screw hole is opened on the rightmost wedge block, and a longitudinal through hole with the same center line as the screw hole is opened on the remaining wedge blocks. Hollow spacer sleeves are installed between adjacent wedge blocks so that all wedge blocks can achieve synchronous movement, and a pull rod is installed in the wedge block and the hollow spacer sleeve. The threaded section at the right end of the pull rod is screwed into the rightmost wedge block, and an adjusting screw is installed on the right part of the thread of the right wedge block. The reduction motor is installed on the protruding end of the adjusting screw. Starting the motor can realize equidistant longitudinal movement of each group of wedge blocks, and the holes at both ends of the arc pad plate that cooperates with it limit its left and right movement through the action of the short shaft to ensure its jacking effect. Because the inclination of the wedge block is different, the up and down displacement of the arc pad plate is different, thereby realizing overall deflection compensation. This mechanical compensation structure is relatively complex, has low stability, poor compensation accuracy, and cannot accurately control the compensation amount of each compensation point.

[0003] Summary of the Invention

[0004] In view of the above-mentioned defects, the object of the present invention is to provide a CNC point-by-point compensation mechanism for a bending machine which has a simple structure, can realize independent control of each compensation point, and improve compensation accuracy.

[0005] The technical solution adopted in the present invention is:

[0006] A CNC point-by-point compensation mechanism for a bending machine includes a base, a groove opened along the length direction is provided inside the base, a plurality of drive compensation devices are installed inside the groove, and the drive compensation device includes an electric push rod, a push rod support, an upper inclined block, a lower inclined block and a guide cylindrical pin. The push rod support is fixedly installed at the bottom of the groove, the fixed end of the electric push rod is installed on the push rod support through a hinge pin, and the movable end of the electric push rod is hinged to the lower inclined block through the hinge pin. The lower inclined block is located in the groove and can move along the length direction of the groove. The upper end surface of the lower inclined block is an upper inclined surface. The upper inclined block is located above the lower inclined block, and the lower end surface of the upper inclined block is a lower inclined surface. The upper inclined surface cooperates with the lower inclined surface. The upper end surface of the base is provided with vertical guide grooves on both sides of the groove. The two ends of the upper inclined block are respectively provided with guide cylindrical pins located in the vertical guide grooves. A sensor holder is provided on the outer wall of one side of the base, and a displacement sensor is provided on the sensor holder. A moving groove is opened on the outer wall of one side of the base, and a sensor bracket is fixedly provided on the side of the lower inclined block. The sensor bracket passes through the moving groove and is connected to the moving end of the displacement sensor through an adjustable connecting shaft.

[0007] As a further improvement of the above technical solution, two limit switches are provided on an outer wall of one side of the base, and the sensor bracket is located between the two limit switches.

[0008] As a further improvement of the above technical solution, the length of the movable slot is greater than the distance between the two limit switches.

[0009] As a further improvement of the above technical solution, the upper end surface of the base is provided with an upper cover plate, the front and rear sides of the base are provided with steps, the front and rear sides of the upper cover plate are provided with flanges matching the steps, and a number of countersunk holes are provided on the upper cover plate, limiting washers are provided in the countersunk holes, countersunk bolts are provided in the countersunk holes, passing through the limiting washers and the countersunk holes and connected to the upper end surface of the base.

[0010] As a further improvement of the above technical solution, a plurality of slots are provided on the upper end surface of the base, and rectangular springs are provided in the slots and located between the base and the upper cover.

[0011] As a further improvement of the above technical solution, side covers are provided at both ends of the base.

[0012] The advantages of the present invention are:

[0013] The present invention has a simple structure. The electric push rod pushes the lower inclined block to move, thereby driving the upper inclined block to move up and down under the limit of the guide cylindrical pin. The sensor bracket on the side of the lower inclined block drives the moving end on the displacement sensor, thereby accurately detecting the up and down movement of the upper inclined block, and feeding back the detected displacement of the displacement sensor to the control system, and then controlling the movement of the electric push rod through the control system to realize closed-loop control of the compensation amount. The compensation amount of each compensation point is accurately controlled according to the different pushing distances of the electric push rod of each compensation point, and finally accurate compensation is achieved. It can realize independent control of each compensation point and improve compensation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG1 is a schematic structural diagram of the present invention.

[0015] FIG2 is a schematic diagram of the structure of FIG1 with the upper cover removed.

[0016] FIG. 3 is a top view of FIG. 1 .

[0017] FIG. 4 is a cross-sectional view taken along line AA in FIG. 1 .

[0018] FIG5 is a schematic structural diagram of BB in FIG2 .

[0019] FIG6 is a schematic structural diagram of a drive compensation device.

[0020] FIG7 is a schematic diagram of the installation structure of the displacement sensor and the base.

[0021] In the figure, 1 is the base, 2 is the groove, 3 is the electric push rod, 4 is the push rod support, 5 is the upper inclined block, 6 is the lower inclined block, 7 is the guide cylindrical pin, 8 is the hinge pin, 9 is the vertical guide groove, 10 is the sensor support, 11 is the displacement sensor, 12 is the moving groove, 13 is the sensor bracket, 14 is the limit switch, 15 is the upper cover, 16 is the limit washer, 17 is the countersunk bolt, 18 is the rectangular spring, and 19 is the side cover. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] A CNC point-by-point compensation mechanism for a bending machine includes a base 1, wherein the base 1 is provided with a groove 2 opened along the length direction, and a plurality of drive compensation devices are installed inside the groove 2, wherein the drive compensation device includes an electric push rod 3, a push rod support 4, an upper inclined block 5, a lower inclined block 6 and a guide cylindrical pin 7, wherein the push rod support 4 is fixedly installed at the bottom of the groove 2, and the fixed end of the electric push rod 3 is installed on the push rod support 4 through a hinge pin 8, and the movable end of the electric push rod 3 is hinged to the lower inclined block 6 through the hinge pin 8, and the lower inclined block 6 is located in the groove 2 and can move along the length direction of the groove 2, and the upper end surface of the lower inclined block 6 is an upper inclined surface, and the upper inclined surface is a cylindrical guide pin 7. Block 5 is located above the lower inclined block 6. The lower end surface of the upper inclined block 5 is a lower inclined surface, and the upper inclined surface cooperates with the lower inclined surface. The upper end surface of the base 1 is provided with vertical guide grooves 9 located on both sides of the groove 2. The two ends of the upper inclined block 5 are respectively provided with guide cylindrical pins 7 located in the vertical guide grooves 9. A sensor support 10 is provided on the outer wall of one side of the base 1. A displacement sensor 11 is provided on the sensor support 10. A moving groove 12 is opened on the outer wall of one side of the base 1. A sensor bracket 13 is fixed to the side of the lower inclined block 6. The sensor bracket 13 passes through the moving groove 12 and is connected to the moving end of the displacement sensor 11 through an adjustable connecting shaft.

[0024] 1] As a further improvement of the above technical solution, two limit switches 14 are provided on one side outer wall of the base 1, and the sensor bracket 13 is located between the two limit switches 14.

[0025] As a further improvement of the above technical solution, the length of the movable slot 12 is greater than the distance between the two limit switches 14, ensuring sufficient moving distance of the sensor bracket.

[0026] As a further improvement of the above technical solution, the upper end surface of the base 1 is provided with an upper cover plate 15, the front and rear sides of the base 1 are provided with steps, the front and rear sides of the upper cover plate 15 are provided with flanges matching the steps, and the upper cover plate 15 is provided with a plurality of countersunk holes, and the countersunk holes are provided with limiting washers 16, and the countersunk holes are provided with countersunk bolts 17 that pass through the limiting washers 16 and the countersunk holes and are connected to the upper end surface of the base 1 to limit the up and down movement distance of the upper cover plate.

[0027] As a further improvement of the above technical solution, a plurality of slots are provided on the upper end surface of the base 1 , and rectangular springs 18 are provided in the slots and located between the base 1 and the upper cover 15 for supporting the upper cover.

[0028] As a further improvement of the above technical solution, side covers are provided at both ends of the base.

[0029] The present invention has a simple structure. The electric push rod pushes the lower inclined block to move, thereby driving the upper inclined block to move up and down under the limit of the guide cylindrical pin. The sensor bracket on the side of the lower inclined block drives the moving end on the displacement sensor, thereby accurately detecting the up and down movement of the upper inclined block, and feeding back the detected displacement of the displacement sensor to the control system, and then controlling the movement of the electric push rod through the control system to realize closed-loop control of the compensation amount. The compensation amount of each compensation point is accurately controlled according to the different pushing distances of the electric push rod of each compensation point, and finally accurate compensation is achieved. It can realize independent control of each compensation point and improve compensation accuracy.

[0030] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A CNC point-by-point compensation mechanism for a bending machine, characterized in that: The invention comprises a base, wherein a groove is provided inside the base along the length direction, and a plurality of driving compensation devices are installed inside the groove, wherein the driving compensation device comprises an electric push rod, a push rod support, an upper inclined block, a lower inclined block and a guide cylindrical pin, wherein the push rod support is fixedly installed at the bottom of the groove, the fixed end of the electric push rod is installed on the push rod support through a hinge pin, the movable end of the electric push rod is hinged with the lower inclined block through the hinge pin, the lower inclined block is located in the groove and can move along the length direction of the groove, the upper end surface of the lower inclined block is an upper inclined surface, and the upper inclined block is located at Above the lower inclined block, the lower end surface of the upper inclined block is a lower inclined surface, and the upper inclined surface cooperates with the lower inclined surface. The upper end surface of the base is provided with vertical guide grooves located on both sides of the groove, and the two ends of the upper inclined block are respectively provided with guide cylindrical pins located in the vertical guide grooves. A sensor holder is provided on the outer wall of one side of the base, and a displacement sensor is provided on the sensor holder. A moving groove is opened on the outer wall of one side of the base, and a sensor bracket is fixedly provided on the side of the lower inclined block. The sensor bracket passes through the moving groove and is connected to the moving end of the displacement sensor through an adjustable connecting shaft.

2. The CNC point-by-point compensation mechanism for a bending machine according to claim 1 is characterized in that: Two limit switches are arranged on an outer wall of one side of the base, and the sensor bracket is located between the two limit switches.

3. The CNC point-by-point compensation mechanism for a bending machine according to claim 2 is characterized in that: The length of the moving slot is greater than the distance between the two limit switches.

4. The CNC point-by-point compensation mechanism for a bending machine according to claim 1 is characterized in that: An upper cover plate is provided on the upper end surface of the base, steps are provided on the front and rear sides of the base, flanges matching the steps are provided on the front and rear sides of the upper cover plate, a plurality of countersunk holes are provided on the upper cover plate, limiting washers are provided in the countersunk holes, countersunk bolts are provided in the countersunk holes, penetrating the limiting washers and the countersunk holes and connected to the upper end surface of the base.

5. The CNC point-by-point compensation mechanism for a bending machine according to claim 4 is characterized in that: A plurality of slots are arranged on the upper end surface of the base, and rectangular springs are arranged in the slots and located between the base and the upper cover plate.

6. The CNC point-by-point compensation mechanism for a bending machine according to claim 4 is characterized in that: Side cover plates are arranged at both ends of the base.

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