JPH062293B2 - Metal plate bending roll device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a bending roll device for a metal plate used for manufacturing a metal bending plate such as a rim plate of a brake shoe.

(Prior Art) Conventionally, a urethane roll shown in FIG. 4 has been used for bending a metal plate used for a rim plate of a brake shoe or the like. Reference numeral 11 is a urethane roll, and 12 is a metal roll. The metal plate A is inserted between both rolls 11 and 12, and the urethane roll 11 is elastically deformed to move the metal plate A along the outer peripheral surface of the metal roll 12. Bending is also performed. By using the urethane roll 11, it can be manufactured even if the plate thickness of the metal plate A is slightly changed.

(Problems to be Solved by the Invention) However, in the case of the urethane roll 11, the repulsive force of the urethane roll 11 cannot sufficiently resist the spring back due to the thickness of the metal plate A, There is a problem that straight parts are formed at both ends of the metal plate A and not only correction work is required, but also the surface of the urethane roll 11 is rapidly worn and deteriorated, and a stable and accurate bending plate cannot be manufactured for a long period of time. Atsuta

(Means for Solving the Problems) The present invention is a metal plate capable of producing a bent plate that is stable and accurate for a long period of time without forming straight portions at both ends in forming a bent plate from a metal plate. The present invention provides a bending roll of the present invention, the structure of which is such that a large-diameter first roll that is rotationally driven and a rotatably rotatably supported by a single frame body are concentric with the first roll. A plurality of small-diameter second rolls arranged on the same circumference, and a plurality of second rolls arranged in the circumferential direction of the frame body so that the second roll is in contact with the outer peripheral surface of the first roll body. And an urging means capable of increasing and decreasing the urging force applied to each second roll by the pressing force adjusting means, and the frame body outside the plurality of second rolls. A metal plate on which a body portion arranged in an arc shape with a space capable of supporting the deformation of the second roll is formed Bending roll device.

(Operation) If the tip of the metal plate is inserted between the large-diameter first roll and the small-diameter second roll and the first roll is rotationally driven, the second roll pivotally supported by the frame body The metal plate is elastically urged toward the first roll by the urging means, specifically, an elastic body or hydraulic pressure through the body, so that the metal plate is moved to the first roll by the next second roll. It is pressed and bent according to the outer diameter of the first roll. A plurality of biasing means are arranged in the circumferential direction,
Since the plurality of second rolls come into constant contact with the outer peripheral surface of the first roll by a substantially uniform pressing force, the metal plate is bent substantially uniformly from the time of insertion between both rolls to the time of discharge. Since the force acts, both ends of the metal plate can be bent well. Further, since the pressing biasing force applied to each second roll by the biasing means can be increased / decreased by the pressing force adjusting means, it is possible to favorably bend various metal plates having different thicknesses. is there.

(Example) Examples of a metal bending roll according to the present invention are shown in Figs.
It will be described with reference to the drawings.

Reference numeral 1 denotes a large-diameter first roll of a metal plate, which is rotationally driven in the direction of the arrow by a drive source (not shown). Reference numeral 2 denotes a small-diameter second roll made of metal, which is rotatably supported by a shaft 2a fixed between opposite arms 3a, 3a of the frame body 3, the outer peripheral surface of which is in contact with the outer peripheral surface of the first roll. Thus, they are concentric with the first roll 1 and arranged on the same circumference. The shaft 2a may be fixed to the second roll 2 and rotatably supported by both arms 3a, 3a of the frame body 3.

The frame body 3 includes both body portions 3b and 3b provided with arms 3a.
Are connected by a plurality of connecting rods 4 arranged at intervals in the circumferential direction, and the inner peripheral surface of the body portion 3b is provided with the deformation of the second roll outside the plurality of second rolls 2. The second roll 2 is formed on an arcuate surface that is substantially concentric with the first roll 1 with a small space that can be supported, and regulates excessive displacement of the second roll 2.
Reference numeral 5 is a push rod, and its tip end is loosely fitted to each connecting rod 4. Reference numeral 6 is an elastic body type urging means for elastically urging the frame body 3 toward the first roll 1 by an elastic body, and of the frame body 6a provided with brackets 6a ', 6a' for fixing to the outside. inside,
Opposing push plates 6b and 6b 'are arranged, and both push plates 6b and 6b
Elastic body 6 such as urethane, other rubber, or spring between b '
It is constituted by interposing c. A plurality of elastic body urging means 6 are arranged in the circumferential direction so as to correspond to each connecting rod 4 in one frame body 3. And one push plate 6b
Is connected to the push rod 5, and the other push plate 6b 'is a frame 6a.
Engages with the tip of the adjusting screw 6d that is screwed onto the side wall of
By the adjustment screw 6d being screwed in and out, the elastic force of the elastic body 6c, the pressing force of each second roll with respect to the first roll 1, and the interval when the metal plate A is inserted can be adjusted. With the adjusting screw 6d for pressing the other pressing plate 6b ',
A pressing force adjusting means for increasing / decreasing the pressing force of the elastic body type biasing means 6 is configured.

Next, the operation will be described.

If the metal plate A is inserted between the first roll 1 and the second roll 2 which are rotating in the direction of the arrow, the second roll 2 is made of an elastic material.
It retreats against the elastic force of c and receives the metal plate A between itself and the first roll 1. With the resilience increased by retreating,
The second roll 2 presses the metal plate A against the outer peripheral surface of the first roll 1, and the rotation of the first roll 1 and the rotation of the second roll 2 on the shaft 2a cause the metal plate A to successively move to the next position. It is sent between the second roll 2 and the first roll 1 to be bent and discharged from between the two rolls 1 and 2.

In this way, the elastic force of the elastic body is adjusted by adjusting the adjusting screw 6d, and the second roll 2 is adjusted according to the plate thickness of the metal plate A.
By adjusting the pressing force due to, the end portion of the metal plate A can be bent well.

FIG. 3 shows hydraulic urging means 7 for urging the frame body 3 by hydraulic pressure toward the first roll 1. A push rod 5 is connected to a piston in the cylinder 7a. Each 7b is a bracket for fixing the cylinder 7a to the outside. Reference numeral 7c is a pipe connected to a hydraulic pressure source (not shown), and 8 is a relief valve. Therefore, by setting the relief pressure of the relief valve 8 according to the plate thickness of the metal plate A, the metal plate A is set to the second position.
The force applied to the first roll 1 by the roll 2 can be adjusted. The relief valve 8 constitutes pressing force adjusting means for increasing / decreasing the pressing force of the hydraulic biasing means 7.

(Effects of the Invention) As can be understood from the above description, the metal plate bending roll according to the present invention has the following effects.

(1) Since the pressing force of each second roll by the urging device is adjusted by the pressing force adjusting device, the bending force according to the plate thickness of the metal plate can be continuously and appropriately generated. Along with urging the frame body by a plurality of urging means in the same direction, it becomes possible to apply an appropriate bending force according to the plate thickness of the metal plate, and both end parts of the metal plate are also good. Now you can bend it.

(2) By using a metal roll, wear of the roll surface,
It has become possible to manufacture a bending plate that is stable and has good accuracy over the long term without causing deterioration unlike urethane rolls.

(3) An arc-shaped body is formed on the frame body that axially supports a plurality of second rolls, and excessive displacement of each second roll is suppressed, so durability is improved by a simple structure. It can be significantly improved.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of a bending roll of a metal plate according to the present invention, FIG. 2 is a partial sectional view showing the second roll, and FIG. 3 is a hydraulic pressure urging means of the same frame. Figures and 4 are schematic views of urethane rolls. 1: 1st roll, 2: 2nd roll, 2a: axis, 3: frame, 3a: both arms, 3b: trunk, 4: connecting rod, 5: push rod, 6: elastic body type biasing means (attachment) Urging means), 6c: elastic body, 6b, 6b ': push plate, 6d: adjusting screw (pressing force adjusting means), 7: hydraulic urging means (urging means), 7a: cylinder, 8: relief valve ( Pressing force adjusting means)

Claims (1)

[Claims] 1. A large-diameter first roll made of metal which is rotationally driven, and rotatably supported by one frame body, and is arranged concentrically and on the same circumference as the first roll. A plurality of second rolls having a small diameter, and a plurality of second rolls arranged in the circumferential direction of the frame,
The frame is elastically biased so that the second rolls come into contact with the outer peripheral surface of the first roll, and the second force is adjusted by the pressing force adjusting means.
Urging means capable of increasing and decreasing the urging force applied to the rolls, and the frame body is formed in an arc shape with an interval capable of supporting the deformation of the second rolls outside the plurality of second rolls. A bending roll device for a metal plate, wherein a body part to be arranged is formed.