JPS62101325A - Angle bender - Google Patents

Abstract

PURPOSE:To prevent the inclination of the axial line of a roll and the band of a work by performing the piping so as to feed the pressure for pushing the 1st jack by distributing to the pressing side of the 2nd, 3rd jacks and by blocking the rear inclination due to the reaction force of the pressing roll. CONSTITUTION:A receiving roll is turned at the equal speed in the same direction when a motor is driven and a pressing roll is turned as well. On the other hand, the press oil is fed to the rear part chamber 6C of the 1st jack 6, the pressing roll is pressed to the work with strong force and the prescribed bending is performed on the work when a hydraulic pump 28 is driven and a change valve 24 is located at the position 24B. Simultaneously the press oil at the front part chamber 6B of the jack 6 acts on the upper part chamber 7B of the 2nd jack 7 and the lower part chamber 9B of the 3rd jack 9 and the both press in the direction that rams 7A, 9A are projecting. In this way, the back part of the moving base is pressed to the upper part by the 2nd jack 7 and the front part of the moving base to the lower part by the 3rd jack 9, and with the reaction force of the pressing force of the pressing roll the trend of the shaft thereof inclining backwards is cancelled and the pressing roll is always maintained in horizontal state.

Description

DETAILED DESCRIPTION OF THE INVENTION 3. Thorough Description of the Invention (Field of Industrial Application) The present invention relates to an angle bender that bends a long material to a predetermined curvature.

[Prior art and its problems] An angle bender used for bending a long metal phase that can be plastically deformed to a predetermined curvature usually has three wooden rolls, and F) two wooden rolls. One roll functions as a receiving roll, and another roll located between these rolls serves as a presser roll, which presses the material against a hydraulic cylinder and rotates to bend the material.

However, the conventional angle bender is
As shown in Figure 0 (A), the movable pressure roll (a) receives the reaction force of the pressure and rotates with its axis (b) tilted as shown by the angle (θ). As a result, the molded product (C) does not become flat as shown in Figure 9 (B) (13 and Figure 10 (B)), and therefore, after bending, it cannot be pressed or hammered. Post-processing is required to correct the flatness of the product.Therefore, the correction process takes a lot of time, and in the case of products that require machine finishing, the material is molded using a material that is thicker than necessary. , there was a lot of material wastage.

[Purpose of the invention]

In view of this, the present invention has been made with the aim of eliminating the drawbacks of the above-mentioned prior art, and it prevents the tilting of the axis of the press roll and other rolls, thereby preventing the bending process from impairing the flatness of the molded product. To provide an angle bender that can.

[Summary of the invention]

In order to achieve the above object, the angle bender of the present invention has the following features:
A moving table is slidably mounted on the machine body, a pair of left and right receiving rolls are rotatably arranged on the upper part of the machine, and a pressure roll located between these receiving rolls is rotatably placed on the upper part of the moving table. In an angle bender that draws a workpiece to a predetermined curvature using a receiving roll and a pressure roll, a first jack that pushes and pulls the movable base in a direction between the receiving rolls, and a back of the movable base. A second jack is interposed between the side of the moving platform and the aircraft side, and is capable of pushing the back of the moving platform upward;
A third jack is provided between the front part of the J stand and the aircraft body side and can press the front part of the movable stand downward, and the pushing pressure of the first jack is applied to the second and second jacks. This is characterized in that the piping is arranged so as to distribute and supply to the pressing side of the jack No. 3, thereby preventing backward tilting due to the reaction force of the pressing roll.

(Embodiments of the Invention) The present invention will be described below with reference to embodiments shown in FIGS. 1 to 8.

The drawings show one embodiment of the angle bender according to the present invention, with FIG. 1 showing a plane view thereof, and FIG. 2 showing a longitudinal side view thereof.

A movable table 2 is mounted on the fuselage 1 so as to be movable in the front and back direction (left and right in the figure) along a guide portion 3.3 (shown in the fifth figure). The pressure roll 5 is provided rotatably within a horizontal plane.

A ram of a first jack 6, which is supported in a horizontal position by the body 1, is connected to the back of the moving table 2 (on the right side in the figure), so that the moving table 2 can be pushed and pulled in the direction of the arrow. .

A second vertical jack 7 is interposed between the jaw 2A on the back of the movable table 2 and the pedestal 2B on the body 1 side.

Further, an arm portion 2C extends from the upper part of the front part (left side in the figure) of the movable platform 1, and a vertical groove is formed between this arm portion 2C and a slide plate 8 disposed on the upper and lower surface of the body 1. 3 jacks 9 are interposed.

On the other hand, on the upper part of the machine body 1, there are left and right receiving rolls 10 and 10 with bearings 11 and 10 located at the same level as the pressure roll 5 and in a substantially equilateral triangle shape with the axis of the pressure roll 5 as the apex.
11 and a vertical shaft 12, so as to be freely rotatable.

The drive system includes a reducer 1 of a motor 13 mounted on the aircraft 1.
The rotation of the motor 13 is transmitted from the gear 15 on the output shaft 14A of No. 4 to the intermediate gear 16, and from this intermediate gear X716 to the gear 17. It is designed to rotate at a constant speed. Further, the pressure roll 5 is transmitted from one gear 17 to a gear 20 on the shaft 4 through an intermediate gear 18.19,
The pressure roll 5 is adapted to be rotated in the opposite direction to the receiving roll 10.10.

In the figure, 21 indicates a workpiece being bent.

FIG. 7 shows an example of a hydraulic circuit that controls the operation of each of the above-mentioned jacks 6, 7, and 9. The front chamber 6B of the first jack 6 and the upper chamber 7B1 on the pressurizing side of the second jack 7 are shown in FIG.
The lower chamber 9B on the pressurizing side of the third jack 9 is connected by the same pipe 22, and this pipe 22 is connected to a switching valve 24 via a check valve 23. Further, the rear chamber 6C of the first jack 6 is connected to the switching valve 24 through a pipe 25 with a check valve 26 opened.

This switching valve 24 is a solenoid valve having a lock position 24Δ and positions 24B and 24C for switching the oil L' between forward and reverse directions. A pipe 29 for supplying pressure oil is connected to the pipe 28 via a check valve 30.
The branch pipe 31 is connected to a two-position electromagnetic switching valve 32,
A relief valve 33 is connected between the two pipes and the branch pipe 31.

In the figure, 34 is a pressure gauge, 35 is a pressure gauge stop valve, and 36 is a pressure gauge.
is a pump drive motor, 37 is a chain coupling ring, 38
indicates a strainer.

Next, the operation of the above embodiment will be explained.

When the motor 13 is started, the receiving rolls 10° 10 are rotated in the same direction at a constant speed through the reducer 14, the gear 15, and the intermediate gear 16, and the intermediate gears t718 and 19 are rotated from the gear 17 to the intermediate gears t718 and 19.
, the press roll 5 is rotated through the gear 20.

On the other hand, when the hydraulic pump 28 is driven and the switching valve 24 is moved to the 248th position, pressure oil is supplied to the rear chamber 6C of the first jack 6 through the piping 29.25, and the moving table 2 is moved to the left in the figure. The press roll 5 is pressed against the workpiece 21 with a strong force, and bending is performed to give the workpiece 21 a predetermined curvature.

At the same time, the pressure oil in the front chamber 6B of the first jack 6 is
It acts on the upper chamber 7B of the second jack 7 and the lower chamber 9B of the third jack 9, both of which are rams 7A.

Apply pressure in the direction in which 9A protrudes. As a result, the back of the moving table 2 is pressed upward by the second jack 7, and the front part of the moving table 2 is pressed downward by the third jack 9. The tendency of the shaft 4 to tilt backward is offset, and the press roll 5 is always held in a horizontal state. This force increases in proportion to the greater the pressure applied to the first shaft 1:6, and matches the pressing force of the pressing roll 5 to prevent the shaft 4 of the pressing roll 5 from tilting. It turns out.

When locking the jacks 6.7.9 during processing, bending can be performed with a constant force by switching the switching valve 24 to the lock position 24A.

The reaction force at this time is received by the second and third jacks 7.9.

After processing, when the switching valve 24 is returned to the 240 position, the pressure oil is returned to the tank 27, the ram 6A of the first jack 6 is pulled back, the movable table 2 is moved backward, and the pressure roll 5 and receiving roll 10. 10 and the workpiece 21 can be taken out.

As a result, the workpiece 21 to be formed is as shown in FIG. 8(A).
As shown in (B), it is formed into a flat shape, and by post-processing, 6
There is no need to apply pressure.

〔Effect of the invention〕

As explained above, the angle bender according to the present invention is
A first jack that receives the moving table and pushes and pulls it in the direction between the rolls; a second jack that is interposed between the back of the moving table and the machine body side and can press the back of the moving table upward; It is interposed between the front part and the fuselage side and presses the front part of the moving platform downward.
A third jack is provided, and the pushing pressure of the first jack is distributed to the pressing sides of the second and third jacks.The piping is arranged in this way, so that the force of pressing the pressure roll against the workpiece is reduced. The larger the tension, the greater the push-up force on the back of the moving platform and the push-down force on the front, which prevents the axis of the press roll from tilting backwards due to reaction force, and keeps the press roll always horizontal. This eliminates the need for post-processing correction work, as well as eliminating the need to increase plate thickness when cutting is required during post-processing. It has various effects.

[Brief explanation of drawings]

Fig. 1 is a plan view showing one embodiment of the present invention, and Fig. 2 is a plan view showing an embodiment of the present invention.
Fig. 3 is a side view of the moving platform in Fig. 1, Fig. 4 is a sectional view taken along the line rv - rv in Fig. 1, and Fig. 5 is a sectional view taken along the line v - v in Fig. 2. The cross-sectional view, Fig. 6, is the vi of Fig. 2.
- New section of the Vl line enlargement, Figure 7 is a piping diagram showing an example of a hydraulic circuit, and Figure 8 is (A). (B) is an explanatory diagram of the relationship between each roll and the workpiece according to the present invention, and FIG. 9 is (A), (B), and FIG. 10 (A).
, (B) are 11 explanatory diagrams showing the case according to the prior art. 1... Airframe, 2... Moving table, 3... Guide section, 4
...shaft, 5...press roll, 6...first jack, 7...second jack, 8...slide plate, 9
...Third jack, 10...Uke roll, 12.
...Axis, 13...Motor, 14...Reducer, 15,
17.20...Gear, 16°18.19...Intermediate gear, 21...Workpiece, 24...Switching valve, 27...
Tank, 28...hydraulic pump. TCIM Figure 1 Figure 9P32 Figure 4 Go to Party Figure 5 Figure 6

Claims (1)

[Claims] A moving table is slidably mounted on the machine body, a pair of left and right receiving rolls are rotatably arranged on the upper part of the machine body, and a press roll located between these receiving rolls is rotatably arranged on the upper part of the moving table. In an angle bender that bends a workpiece to a predetermined curvature using these receiving rolls and pressing rolls, a first jack that pushes and pulls the movable base in the direction between the receiving rolls, a back of the movable base, and a machine body are used. A second jack is interposed between the side of the movable base and can press the back of the movable base upward; and a second jack is interposed between the front of the movable base and the aircraft side and can press the front of the movable base downward. A third jack is provided, and piping is provided so that the pushing pressure of the first jack is distributed and supplied to the pressing sides of the second and third jacks to prevent backward tilting due to the reaction force of the pressure roll. An angle bender characterized by the following features.