JPS6317008B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a metal material forming apparatus for bending and forming metal materials such as metal plates and metal cylindrical bodies into desired product shapes.

(Prior art and its problems) Conventionally, presses have been used to form large molded products such as large impeller side plates, hoppers, expansion joints, jackets, etc. by molding materials such as metal plates. Processing, manual hammering, or drawing by spinning are used.

However, press working and hammer working have the problem that unevenness and scratches caused by the mold, etc. occur on the molding surface because it is a partial pressing process, and it takes time and effort to correct these scratches. ,
Mold costs are high, and only products with shapes that fit the mold can be obtained.

Further, if the plate thickness exceeds 6 mm, it cannot be formed without heat processing, and such hot processing has the problem of shrinkage due to heat, which deteriorates the dimensional accuracy of the product.

On the other hand, according to the conventional spinning method, the material is constantly pressed against the mold by rolls, which causes the material to stretch and reduce the thickness of the material, resulting in a decrease in mechanical design strength. In addition, there are shapes that cannot be bent using rolls and molds, and only simple forming can be performed, and furthermore, hot spinning causes the problem of dimensional accuracy as described above.

(Objective of the Invention) The present invention has been made in view of the above-mentioned problems, and it is possible to perform molding with high precision by cold working without using a mold, and the finish is beautiful. An object of the present invention is to provide a metal material forming apparatus that can easily and reliably perform bending into a complex shape without creating any thin parts.

(Structure of the Invention) In order to achieve the above object, a metal material forming apparatus according to the present invention has a support provided on one side of a rotatable horizontal table, and a sliding member is moved up and down along the support. In addition to being movably disposed, a supporting stand is attached to this sliding member so as to be freely rotatable in the vertical direction, and a pair of forming rolls are supported in parallel on the supporting stand, and one forming roll is connected to the other forming roll. The horizontal table can move toward and away from the roll in the horizontal and vertical directions, and the horizontal table can be moved toward the forming roll. is moved to a position where the material can be formed, and the height position of the forming rolls is adjusted according to the height of the material, so that the upper edge of the material is compressed from the inside and outside by the pair of forming rolls. However, these forming rolls are configured to perform the forming process by moving them in accordance with the bending shape to be formed.

(Description of Embodiments) Embodiments of the present invention will be explained with reference to the drawings.
is a horizontal table disposed on a rectangular horizontal fixed base 2, the center of which is pivotably supported 4 at the center of the upper surface of a sliding base 3 that is slidably provided along the fixed base 2. A screw rod 6 rotated by a motor 5 installed at one end of the fixed table 2 is screwed into a screw tube 7 fixed to the lower surface of the sliding table 3, and the horizontal table 1 is suspended by rotating the screw rod 6 from side to side. can be moved and adjusted in the length direction of the fixed base 2.

Reference numeral 8 denotes a vertical support erected along the center of one side edge of the fixed base 2, and a sliding member 9 is attached to the front side of the vertical support so as to be vertically slidable. Similarly, a screw rod 11 is screwed through a screw cylinder 10 fixed to the back side of the support column 8, and the screw rod 11 is rotated by a motor 12 with a speed reducer installed at the upper end of the support column 8 to move it up and down.

Reference numeral 13 denotes a support base rotatably supported at the tip of the sliding member 9. A gear 14 is integrally provided on the inner circumferential surface of the cylindrical portion fitted into the sliding member 9. A pinion 16 fixed to the rotating shaft of a motor 15 installed in the motor 15 is engaged with the rotating shaft of the motor 15, and the support base 13 is rotated in a vertical plane with respect to the sliding member 9 by driving the motor 15.

Reference numeral 17 denotes a vertical shaft rotatably supported on one side of the support base 13, which is rotationally driven via a reducer 19 by a motor 18 installed on the upper surface of one side of the support base 13. A forming roll 20 is detachably fixed to the lower end protruding from the lower surface of the roller.

A sliding frame 21 is disposed between the opposing inner surfaces of the support base 13, and is supported by the support base 13 so as to be able to slide left and right.A hydraulic cylinder 22 is fixed inside the sliding frame, and the roll mounting bar 23 can be moved up and down. The upper horizontal bent portion 23a of the roll mounting bar 23 is connected to the tip of the rod of the hydraulic cylinder 22.

24 is a forming roll that is rotatably supported on the lower end of the roll mounting bar 23;
0, and this forming roll 24 is also detachably attached.

25 is a hydraulic cylinder disposed at the other end of the support base 13, and its piston rod is connected to the sliding frame 21, and the frame 21 is connected to one of the forming rolls 2.
This is to adjust the movement in the direction toward and away from zero.

Note that the line connecting the centers of both forming rolls is aligned with the horizontal table movement direction passing through the center of the horizontal table 1.

The method of forming, for example, a large hopper using the metal material forming apparatus configured as described above will be explained.

First, a truncated conical cylindrical hopper material a is placed in the fourth
As shown in the figure, the material is placed on the horizontal table 1 with its large diameter side facing downward, and the center of the material is aligned with the rotation center of the horizontal table 1. a horizontal table 1
Weld and fix.

Next, by driving the motor 5 and rotating the screw rod 6, the horizontal table 1 is moved along the fixed base 2 to below the support base 13, and the front surface of the outer periphery of the upper end opening of the material a is preliminarily The sliding member 9, whose height is adjusted according to the material a by driving a motor 15 disposed at the upper end, is stopped in a state in which it is brought into contact with one of the forming rolls 20.

Thereafter, the hydraulic cylinder 22 is operated to move the other forming roll 24 downward, and the left-right moving hydraulic cylinder 25 is actuated to move the forming roll 24 to the one forming roll 20 side. The inner and outer peripheral surfaces of the material a are held between the forming rolls 20 and 24.

After the upper end opening front part of the material a is sandwiched between the two forming rolls 20 and 24 in this way, when the support base 13 on which these rolls 20 and 24 are provided is rotated by a small angle, both forming rolls 20 and 24 The part of the material held between the two is bent. At this time, when the motor 18 is driven to rotate one of the forming rolls 20 via the reducer 19, the material a rotates together with the horizontal table 1 due to its rotational force.
The material portion sandwiched between the forming rolls 20 and 24 is bent at the same angle over its entire circumference.

Furthermore, if the support base 13 provided with both forming rolls 20 and 24 is gradually raised or lowered by driving the motor 12 with a speed reducer disposed at the upper end of the support column 8, The material clamping portion moves from the open end of the material a to a desired height portion to bend and form the portion.

In this way, the work of bending and forming the material a to a desired degree of curvature by changing the inclination angle of the pair of forming rolls 20 and 24 by rotating and tilting the support base 13, and the rotation of one forming roll 20 are performed. The material a is rotated in the circumferential direction by sliding on this roll 20,
A process of bending the entire circumference of the material to a desired degree of curvature, and a desired bending process in the length (height) direction of the material a is performed by moving both forming rolls 20 and 24 together in the vertical direction. The opening of the material a is processed into a uniformly curved surface by combining the above operations.

At this time, one forming roll 20 receives the outer peripheral surface of the material a, and the other forming roll 24
from the state where the material a is brought close to the inner circumferential surface of the material a.
3, the other forming roll 24 comes into contact with the inner surface of the material a during its rotation, and from this state it further rotates to transfer the material a to the one forming roll 2.
0, and can be bent along the surface of the roll 20. According to such cold bending, bending can be performed without substantially reducing the thickness of the forming part of the material a. be able to.

The product thus subjected to the bending process is removed from the horizontal table 1 by removing its welded and fixed piece piece 26.

In the same way, various bending processes such as impeller side plates, expansion joints, jackets, etc. can be performed, and by replacing the forming rolls with different surface shapes, the desired forming process can be carried out efficiently and accurately. It is something.

(Effects of the Invention) As described above, according to the metal material forming apparatus of the present invention, a support is provided on one side of a rotatable horizontal table, and a sliding member can be moved up and down along the support. At the same time, a supporting stand is attached to the sliding member so as to be freely rotatable in the vertical direction, and a pair of forming rolls are supported in parallel on the supporting stand, and one forming roll is connected to the other forming roll. The horizontal table can be moved toward and away from the metal material in the horizontal and vertical directions, and the horizontal table can be moved toward the forming roll, so that the horizontal table can be moved according to the size of the shape of the metal material fixed on the horizontal table. By this, the part to be formed can be accurately aligned with the position of the pair of forming rolls, and in addition, the support base on which the pair of forming rolls are arranged can be moved up and down along the support column via the sliding member. Since it is movable, the position of the forming roll can be easily adjusted according to the height of the metal material, and
Since the support table can be moved up and down and rotated on a vertical plane, it is possible to perform cold bending of the metal material at the desired height of the opening to the desired degree of curvature with high precision. Coupled with the fact that the molding roll is movable and adjustable in the horizontal and vertical directions with respect to the other molding roll, complex bending can be performed easily and accurately with almost no reduction in thickness.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and Fig. 1 is a front view, Fig. 2 is a side view, Fig. 3 is a plan view, and Fig. 4 is a plan view.
The figure is a cross-sectional view of a metal material attached to a horizontal table.
Figure 5 is a sectional view of the rotation mechanism of the support base, Figures 6 and 7 are front views of the support base when it is rotated from a horizontal state to a vertical position, and Figures 8 and 9 are bending work. Front view of the state in which the
FIG. 1 is a sectional view showing a processing state of another metal material. DESCRIPTION OF SYMBOLS 1... Horizontal table, 2... Fixed base, 3... Sliding base, 8... Support column, 9... Sliding member, 13... Supporting material, 20 and 24... Roll for forming.

Claims (1)

[Claims] 1 A support is erected on one side of a rotatable horizontal table, a sliding member is arranged to be movable up and down along the support, and a support is attached to the sliding member so as to be rotatable in the vertical direction. , a pair of forming rolls are supported in parallel on the support base, and one forming roll can be freely moved toward and away from the other forming roll in the horizontal and vertical directions, and the horizontal table is connected to the forming rolls. A metal material forming device characterized by being movable to the side.