JPH05212453A - Device for bending long size member with asymmetrical cross-sectional shape - Google Patents

Abstract

PURPOSE:To correct distortion such as kink in a long member and to form the member in a uniform shape at a required radius of curvature without need of a skilled worker. CONSTITUTION:A pressure cylinder 13 is arranged on the center line of a pedestal; a movable pressure base 16, in which supporting rollers 25 making a pair horizontally rotatably with a prescribed space are provided, is connected to the cylinder; a press roll 27 is provided horizontally rotatably via a supporting shaft on the center line opposite to the supporting rollers; a supporting base that is symmetrical in a projecting manner forward is provided on the left and right of the pressure movable base; on the left and right supporting bases, a correcting roller 33 is rotatably supported and one end of the roller supporting base 32 is attached via hinges of the supporting base. Then, on the other end, adjusting bolts 40 are vertically arranged movably forwards and backwards with screws so as to be capable of supporting the left and right ends of the long member W; against the long member that is moved left and right through the rotation of the supporting roller, the adjusting bolts are adjusted, the correcting roller 33 is held slanted, and the long member W is straightened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending apparatus for bending an asymmetric member, for example, a long member such as an angle steel into a predetermined radius of curvature, and more particularly to a bending apparatus equipped with a strain straightening device.

[0002]

2. Description of the Related Art Conventionally, when bending an asymmetrical shape of this kind, for example, a long angle steel W to a predetermined radius of curvature, there is a processing apparatus 1 shown in FIG. 7, and this processing apparatus 1 has a predetermined diameter. Support rollers 2 and 3 having the above are rotatably provided on a base in a horizontal manner at predetermined intervals, and a pressure cylinder 4 is horizontally provided in a central portion between the support rollers 2 and 3. A pressure roller 6 having a predetermined diameter is rotatably attached to the tip of the piston rod 5 of the cylinder 4, and the support roller 2
One piece Wa of the angle steel W is shown between the rollers 3 shown in FIG.
Is attached to the outer surfaces of the rollers 2 and 3 while the other piece Wb is attached to the outer surfaces of the rollers 2 and 3, and the pressure cylinder 4 is extended to bring the pressure roller 6 into contact with the piece Wb at a predetermined pressure. In this state, the driving sources 7 of the supporting rollers 2 and 3 are operated in the forward and reverse directions to alternately move the angle steel W to the left and right, and in the course of this movement, the pressing cylinder 4 gives a predetermined pressing amount to the pressing roller 6. Bending was performed to the required radius of curvature.

[0003]

However, when bending is performed by the above-mentioned apparatus 1, as shown in FIG. 8, in the piece WB pressed by the pressure roller 6 of the angle steel W, the portion indicated by the triangle mark. The compressive stress acts on the part indicated by ▲, the tensile stress acts on the part indicated by ▲, the compressive stress also acts on the part indicated by △ on the piece Wa, and the tensile stress acts on the part indicated by ▲. There is a problem that the steel W cannot be uniformly bent and twists.
Further, there is a problem that requires a skilled worker, and in addition to this, the angle steel W was formed into a predetermined radius of curvature by hot forging, but in this case, fuel consumption and processing time are required, There was a problem that a uniform product of the same shape could not be secured.

The present invention has been made to solve the above-mentioned problems of the prior art, and can correct distortion such as twisting of a long member without requiring an expert, and has a uniform shape. An object of the present invention is to provide a bending device that can be formed into a radius of curvature.

[0005]

SUMMARY OF THE INVENTION In order to solve the above technical problems, the present invention is a bending apparatus for bending an asymmetrical long member to a predetermined radius of curvature, which is located on the center line of a base. The pressurizing cylinder is provided, and the pressurizing movable base is connected to the piston rod of the pressurizing cylinder, and a pair of supporting rollers is provided at symmetrical positions with respect to the center line so as to be horizontally rotatable at predetermined intervals. The roller is appropriately connected to the driving means so as to be able to rotate in the same direction, and a pressing roller is provided on the center line on the opposite side of the supporting roller so as to be horizontally rotatable via a support shaft. On the left and right sides of the table, symmetrically extending support bases are provided in the front, and on the left and right support bases, correction rollers are rotatably supported, and one end of the roller support base is inserted through a hinge of the support base. And install the adjustment bolt on the other end. The lengthwise member is vertically installed so as to be able to advance and retreat so as to support the left and right ends of the elongated member, and the adjustment bolt is adjusted with respect to the elongated member that is moved left and right by the rotation of the support roller to hold the correction roller in a tilted state. The present invention resides in an apparatus for bending a long member having an asymmetrical cross-sectional shape, which is configured to correct the same long member.

[0006]

With the above structure, the pressing cylinder is extended to give a predetermined feed amount to the support roller, and the support roller is rotated forward and backward to hold the long member by the pressing roller. It can be plastically deformed to a predetermined radius of curvature by moving it to the left and right, and in the process of left and right movement of this long member, the adjusting bolts of the correction devices arranged on the left and right are adjusted to prevent twisting that is likely to occur due to plastic deformation. Twist can be corrected by tilting the correction roller so as to apply a reaction force.

[0007]

1 is a plan view of a bending apparatus 11 and FIG. 2 is a front view of the bending apparatus 11 of the present invention. On the base 12 of the pressurizing cylinder 13, the press movable base 1
6 and the pressing roller 27 are arranged along the center line C of the base 12.

The pressurizing cylinder 13 has a predetermined pressurizing ability, and is arranged along the center line C of the base 12 so that the piston rod 14 is directed toward the pressing roller 27. A pressing movable table 16 is attached to the tip.

The pressing movable base 16 is reciprocally moved on the sliding base 15 mounted on the base 12 along the center line C to the left and right in the figure, and is formed in a substantially rectangular box shape. As shown in FIG. 5, the movable table 16 has a rotating shaft 19 rotatably supported between the upper frame 17 and the lower frame 18 at a predetermined distance from the center line C to the left and right, and also has a left and right rotation. The shaft 19 projects from the upper frame 17 by a predetermined length. Worm wheels 20 are keyed to the rotary shafts 19 at predetermined positions in the movable base 16 respectively. A drive shaft 22 is rotatably supported near the pressurizing cylinders 13 of the left and right frames 21 of the movable table 16, and worms 23 meshing with and linked to the left and right worm wheels 20 are keyed to the drive shaft 22, respectively. Has been done. A hydraulic motor 24 is attached to one end of the drive shaft 22. A support roller 25 having a predetermined diameter and a predetermined thickness is detachably attached to a predetermined position corresponding to the left and right rotary shafts 19 protruding from the upper frame 17. Further, on the side of the pressing roller 27 of the movable table 16, an escape recess 26 for the pressing roller 17 with respect to the center line C is formed. The pressing movable base 16 thus formed is attached to the sliding base 15 so as to be prevented from floating and slidable along the center line C, and is connected to the piston rod 14 of the pressure cylinder 13. There is.

Further, the pressing roller 27 is provided with a support shaft 28 erected at a predetermined position on the center line C of the base 12 near the right end in the figure.
It is rotatably and detachably attached, has a predetermined diameter, and is formed to have a thickness slightly higher than that of the support roller 25.

Further, support bases 30 are attached to the left and right of the above-mentioned pressing movable base 16 symmetrically with respect to the center line C, and a pair of right and left correction devices 31 are attached on the left and right support bases 30. ..

The straightening device 31 has the same structure,
The roller support 32 includes a roller support 32 and a correction roller 33. The roller support 32 is formed in a substantially rectangular plate shape, and bearing portions 34 are provided on the upper surface of the roller support 32 at predetermined intervals to rotate the correction roller 33. It is supported as much as possible. In addition, a bifurcated hinge himeme 35 formed on the support base 30 side and a hinged mail 37 pivotally mounted by a pin 36 are projectingly provided at the center of one end side on the lower surface side of the roller abutment 32, and the other end. A scale plate 38 provided with a scale (for example, an angle scale within a range of +20 degrees and -5 degrees with respect to the horizontal state of the straightening roller 23 of 0 degree) is attached to the central portion of the lower surface of the side. Three
It is provided so as to extend below the support base 30 from between the adjustment abutments 39 which are attached at a predetermined interval to 0. Further, an adjusting bolt 40 is vertically installed at a predetermined interval at the end portion on the side where the scale plate 38 is provided so as to be able to advance and retreat. As the roller support 32 is screwed back and forth, the roller support 32 is tilted at a predetermined angle around the pin 36 to adjust the angle of the correction roller 33. The left and right straightening devices 31 formed in this way
Is mounted at a predetermined angle with respect to the center line C as shown in the drawing, and the straightening roller 33 is provided in a horizontal state with a predetermined gap between the outer periphery thereof and the lower surface of the support roller 25.

FIG. 4 is a hydraulic piping diagram of the pressurizing cylinder 13 and the hydraulic motor 24. The supply pipe 42 from the hydraulic pressure source 41 is a P port of an electromagnetic switching valve 43 for switching the pressurizing cylinder 13. Connected to the electromagnetic switching valve 43
Port A of the pressurizing cylinder 13 and the piston chamber 13a of the pressurizing cylinder 13 are connected by a high-pressure pipe 44.
B port and piston rod chamber 13 of pressure cylinder 13
It is connected to b by a low pressure line 45. In addition, pilot type check valves 46 and 47 are arranged in the high pressure line 44 and the low pressure line 45, respectively.

The supply branch pipe 48 branched from the supply pipe 42 is connected to the P port of an electromagnetic switching valve 49 for switching the hydraulic motor 24 in the forward and reverse directions, and the electromagnetic switching valve 49 is connected.
The A and B ports of the hydraulic motor 2 via the high pressure hose 50.
4, solenoids SOL2a, SO of solenoid control valve 49
The hydraulic motor 24 is rotated in the normal and reverse directions by switching L2b.

Since this embodiment is constructed as described above, first, when the solenoid SOL1b of the electromagnetic switching valve 43 of the pressurizing cylinder 13 is excited, the oil flows into the piston rod chamber 13b and the piston rod 14 is moved. The pressure movable table 16 is shortened to retract and stand by at the initial return position, for example, the extension 0 position of the piston rod 14. In this state, one piece Wa side of the angle steel W is placed so as to straddle the correction rollers 33 of the left and right straightening devices 31, and the piece Wa is inserted into the lower surface side of the support roller 25 to form the angle steel. Align the center of the length of W with the centerline C.

Thereafter, the solenoid SO of the solenoid operated directional control valve 43 is
The L1a is excited to feed oil into the piston chamber 13a to extend the piston rod 14 to bend the angle steel W against the pressing roller 27 on the supporting roller 25 arranged on the pressing movable base 16 with a predetermined radius of curvature. Give the feed amount for. As a result, the angle steel W is bent and deformed at the center between the left and right support rollers 25 and the pressing rollers 27. In this state, the solenoid of the electromagnetic switching valve 49 of the hydraulic motor 24
As the SOL2a and SOL2b are alternately switched, the hydraulic motor 24 is rotated in the forward and reverse directions, and the left and right support rollers 25 pass through the drive shaft 22, the worm 23, and the worm wheel 20, and the solid line arrow and the broken line as shown in FIG. Alternately rotated by arrows,
As a result, the angle steel W is moved left and right, and the left and right ends are guided and supported by the straightening rollers 33 of the right and left straightening devices 31 and plastically deformed in the length direction to a predetermined radius of curvature.

In the process of plastically deforming the supporting roller 25 and the pressing roller 26 to a predetermined radius of curvature, the angle steel W is formed.
In the same manner as in the prior art, the tensile stress and the compressive stress act on the pieces Wa and Wb to cause torsional deformation, but the adjustment bolts 40 of the straightening device 31 are provided on the left and right moving sides of the angle steel W.
It is possible to correct the deformation by visually confirming the twisting deformation on the moving side and adjusting the screw forward / backward according to the deformation to impart the inclination of the correction roller 33 to give a reaction force to the deformation side. By confirming and recording the angle of the roller abutment 32 at this time by the scale plate 38, the correction angle for the radius of curvature of the angle steel W of the same size is selected, and the angle of curvature of the angle steel of the size steel of the same size is selected. Molding becomes possible.

When the molding is completed, the electromagnetic switching valve 49 of the hydraulic motor 24 is set to the neutral position to stop the rotation, and when the solenoid SOL1b of the electromagnetic switching valve 43 of the pressurizing cylinder 13 is illustrated, the oil flows into the piston rod chamber 13b. The piston rod 14 is shortened and the pressing movable base 16 is also integrally retracted, and the bent angle steel W is taken out. Less than,
Bending is performed in the same procedure.

Since the bending apparatus 11 of this embodiment is constructed as described above, the pressurizing cylinder 13 is extended to give a predetermined feed amount to the supporting roller 25, and the supporting roller 25 is rotated forward and backward. When the angle steel W is clamped by the pressing roller 27 and left and right in the state of being left and right by being given, it can be plastically deformed to a predetermined radius of curvature. The adjustment bolt 40 of 31 is adjusted so that the twist can be corrected by tilting the correction roller 33 so as to give a reaction force to the twist that is about to occur due to plastic deformation. It is possible to efficiently produce a product having the same predetermined uniform radius of curvature without requiring

In the above embodiment, the feed amount corresponding to the radius of curvature is given to the support roller 25 by the pressure cylinder 13 at one time. However, in this case, it is applied when the radius of curvature is large. When the radius is small, slipping occurs when the feed amount is given at one time, so the feed amount is given several times for processing. Further, in the above embodiment, the driving of the support roller 25 is performed by the hydraulic motor 2.
However, the present invention is not limited to this, and may be driven by a reversible electric motor, for example.

[0021]

According to the present invention, a pressurizing cylinder is arranged on the center line of the base, and a pair of piston rods of the pressurizing cylinder are horizontally rotatable at predetermined intervals at symmetrical positions with respect to the center line. The support roller provided with a supporting roller is connected to the drive means so that the support roller can be rotated forward and backward in the same direction, and a support shaft is provided on the center line on the opposite side of the support roller. The press roller is provided so that it can rotate horizontally.
Further, symmetrical support bases extending forward are provided on the left and right sides of the pressing movable base, and correction rollers are rotatably supported on the left and right support bases to support the roller abutment at one end thereof. A long member that is attached via a hinge of a stand and is vertically installed on the other end side so as to be capable of screwing forward and backward so as to support the left and right ends of the long member, and that moves left and right by rotation of the support roller. On the other hand, the adjustment member is adjusted so that the straightening roller can be tilted and held to straighten the same long member, so that the same length and uniform predetermined radius of curvature can be obtained without requiring a skilled person as in the prior art. The product can be produced efficiently.

[Brief description of drawings]

FIG. 1 is a plan view of a bending device.

FIG. 2 is a front view of a bending apparatus.

FIG. 3 is an enlarged side view of a pressing movable base, a pressing roller, and a straightening device.

FIG. 4 is a hydraulic piping diagram of a pressurizing cylinder and a hydraulic motor.

FIG. 5 is a partially cutaway plan view illustrating a set of long members.

FIG. 6 is a plan view illustrating pressure molding of a long member.

FIG. 7 is a schematic view of a conventional bending apparatus.

FIG. 8 is a cross-sectional view illustrating a stress that occurs when bending a long member.

[Explanation of symbols]

 11 Bending Device 12 Base 13 Pressure Cylinder 14 Piston Rod 16 Pushing Movable Base 25 Support Roller 27 Presser Roller 28 Support Shaft 30 Support Stand 31 Straightening Device 32 Roller Abutment 33 Straightening Roller 35 Hinge Hemer 36 Pins 37 Hinge Mail 40 Adjustment bolt W Long member

Claims (1)

[Claims] 1. A bending apparatus for bending an asymmetrical long member to a predetermined radius of curvature, wherein a pressurizing cylinder is arranged on the center line of a base, and a piston rod of the pressurizing cylinder is provided. A pressing movable base provided with a pair of supporting rollers capable of horizontally rotating at a predetermined interval at left-right symmetric positions with respect to the center line is connected to the supporting roller, which is appropriately connected to driving means to enable forward and reverse rotation in the same direction. Further, a pressing roller is provided on the center line on the opposite side of the supporting roller so as to be horizontally rotatable via a support shaft, and further, on the left and right sides of the pressing movable table, symmetrical supporting tables extending forward are formed. A straightening roller is rotatably supported on the left and right supporting bases, one end of which is attached via the hinge of the supporting base, and an adjusting bolt can be screwed back and forth on the other end side. Can be installed vertically to support the left and right ends of the long member Bending of a long member having an asymmetric cross-section, which is provided to adjust the adjusting bolt with respect to a long member that moves left and right by rotation of the support roller to tilt and hold the correction roller to correct the same long member. Processing equipment.