JPS62101333A - Speed control device for rotary plastic working device - Google Patents

Abstract

PURPOSE:To reduce the burden on an operator and to obtain good rolling result by providing the arithmetic unit which commands the rotary speed of the upper and lower axial rolls and the arithmetic unit which commands the position of the rolling part in the axial direction. CONSTITUTION:The rotary speed control calculates an index value Tx by the mechanically decided constant Ca and the positional signal of the cylinder C4 for measuring the work outer diameter as the sensor to detect the position of the work W. The optimum speed command to motors M2, M3 is performed by performing a multiplication and division at the inner part of an arithmetic unit OP2. The positional control of the axial rolling part is performed by using an arithmetic unit OP1. Namely, a cylinder C2 is driven in the direction in realizing Tx=Cx which is the amplifier for controlling the cylinder 2 by inputting the value given by Tx-Cx from Tx and position designating value Cx to the arithmetic unit OP1. In case of the Tx becoming large with the abutting face with the cylindrical material of the axial roll ARU, ARD being slided to the rear part in the rolling of the cylindrical material, the cylinder 2 is followed thereto and the rolling is performed at the same roll face position all the time.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) □ The present invention relates to a rotary plastic working device, particularly an operation control device for a ring rolling mill.

(Prior Art) There is a rotary plastic processing device known as a ring rolling mill. The specific structure of this device is disclosed, for example, in FIGS. 1 and 4 of the earlier application No. 104697/1983.

The outline of the mechanism of this device is shown in the plan view in Figure 4 (a) and in Figure 11.
It is as follows with reference to the side view of figure (b).

A ring-shaped cylindrical material, that is, a work W, is moved by a motor (M
King roll (KG) with vertical axis arrangement driven by
) and a mandrel roll (
The mandrel roll is held by the king roll from the inside and outside by the driving cylinder (C1), and performs rotational plastic working of the workpiece. These are circumferential rolling sections (9). The workpiece W is rolled in the vertical direction by the axial rolling section (2). In this part, an upper axial roll (ARU) and a lower axial roll (ARD), which are rotationally driven by motors (Ml) and (M5), respectively, hold the workpiece W between the upper and lower sides, and the upper roll is an axial rolling drive cylinder (C5). pressed down by
Further, since the diameter of the workpiece gradually increases during the processing process, the axial rolling section (2) is moved as a whole by the axial rolling section moving cylinder (C2).

Conventionally, the motor (Ml) CM5) used a torque motor etc. to match the work speed, and the motor (Ml) (CM5) was used to match the work speed.
C2) was driven manually based on the operator's judgment.

(Problems to be Solved by the Invention) In the prior art, the axial rolling part needs to be moved at the operator's discretion, so the operator has to monitor the machining state of the workpiece, making the operation complicated. Furthermore, since the motors (Ml) (Ml) (M5) are driven individually, there is a problem in that the rotational speed on the axial roll side cannot be sufficiently matched to the workpiece feeding speed. The object of the present invention is to provide a control device that can eliminate operational disadvantages and inconveniences of a rotary plastic processing device and correct and supplement functional deficiencies.

(Means, operations, and embodiments for solving the problems) In order to achieve the above object, the present invention includes a sensor and a motor (Ml) that detect the position of the rolling part in the longitudinal direction by the stroke of the cylinder (C2), etc. (Ml)
(M5) is provided with a sensor to detect the rotational speed of the king roll and upper and lower axial rolls to control the speed of these rolls, and a servo mechanism is added to the cylinder (C2) to control the stroke. As a result, the feed rate matching and position adjustment of the axial rolling section with the feed rate of the workpiece can be automatically performed. By adding an algorithm for roughly correcting the position of the contact surface of the axial roll and a mechanism for sequentially changing the position of the contact surface, wear on the roll surface can be made uniform.

In order to realize these things, the speed control device of the rotary plastic processing apparatus of the present invention is configured to include a king roll and a mandrel roll arranged along a vertical axis that move relative to each other, and a circumferential rolling portion of the same cylindrical material and a cylindrical A sensor for detecting the position of the axial rolling part, and a cylindrical material in a rotary plastic processing apparatus that includes an axial rolling part consisting of upper and lower axial rolls that roll the material in the vertical direction, and allows relative movement of the rolling part. A sensor for detecting the position of the king roll and a sensor for detecting the rotational speed of the upper and lower axial rolls is provided, and an arithmetic device is provided for commanding the rotational speed of the upper and lower axial rolls by calculation from the king roll rotational speed signal. The present invention is characterized in that a calculation device is provided which commands the position of the axial direction rolling section by calculation based on the position signal of the shaped material.

Hereinafter, the present invention will be specifically explained with reference to embodiments shown in the accompanying drawings.

Since the basic structure of the rotary plastic working apparatus itself is almost the same as that of the conventional one, FIGS. 4(a) and 4(b) and their explanations will be referred to. As a control device of the present invention, FIG. 1 shows a side view showing the arrangement of sensors and a position control system, FIG. 2 shows characteristic values of an axial roll, and FIG. 3 shows a speed control system.

In the present invention, as shown in FIG. 1, a workpiece outer diameter measuring cylinder (C4) is provided as a sensor for detecting the position of the workpiece W, and its position signal is used as a sensor. An axial rolling section moving cylinder (C2) is used as a sensor for detecting the position of the axial rolling section (4), and its position signal is set to 02. The motor (Ml) is used as a sensor to detect the rotational speed of the king roll (KG), upper and lower axial rolls (ARU) (ARD).
(M5) is provided with a sensor such as an octopus generator, and its speed signals are designated as r+, rtake, and r3, respectively.

As shown in FIG. 3, an M1 speed command device (SV) is provided to command the speed r1 of the motor (Ml), and the speed r1 is inputted to an arithmetic unit (OF2).
The zero rotational speed control is performed in the following manner by inputting and calculating the speeds r1, r to the motors (Ml) (M5).

The index value Tx is calculated by Tx = Oa - (E4.

Ca is a mechanically determined constant. Using this Tx, the appropriate rotational speed r of the motors (M2) (M5)
z, rsl''l, the relational expression between the workpiece speed on the king roll and the workpiece speed on the axial roll shown in FIG. 2 is given by rx (rs) = Tx (13rr).

Here, since DKG is the diameter of the king roll and θ is 1/2 of the cone angle of the axial roll, appropriate speed commands can be given to the motors (M2') and (M5') by performing multiplication and division.

The position control of the axial rolling section (4) is performed using a calculation device (API).
) is used as follows. In Figure 2 (E
Tx, which is also a function of 2.04, and position specification value Ox to Tx
- Input the value given by Ox to the arithmetic unit (OPI). The arithmetic unit (OPl) is an amplifier for controlling the cylinder (C2), and drives the cylinder (C2) in a direction to realize Tx=CX. When the cylindrical material is rolled, the contact surface of the axial roll (ARU) (ARD) with the cylindrical material shifts backward, and as Tx increases, the cylinder (C2) moves in a direction to follow this. In this way, rolling is always performed at the same roll surface position.

By the above two control operations, the axial rolling section is automatically driven according to the processing of the cylindrical material, and the rotation speed of each motor for processing the cylindrical material is automatically adjusted, so that the operator can This reduces the burden on users and improves the processing quality of cylindrical materials.

Modifications of the present invention include the following aspects.

(I) As mentioned above, keeping the contact surface of the roll against the cylindrical material constant is advantageous in terms of motor speed controllability, but there is a problem in that it causes uneven wear of the roll surface. Therefore, this problem can be solved by adding a program that sequentially changes the position Ox of the contact surface of the cylindrical material.

(Il) In the above embodiment, a tacho generator is used to measure the actual speed of the motor (Ml) with respect to the MI speed command (SV).
If there is a slippage etc. between the aircraft and the aircraft, it will not be possible to accurately measure the speed.This problem can be solved by installing a non-contact speed sensor on the aircraft side to detect the speed. can.

(Effect of the invention) According to the present invention, the following effects can be obtained.

The rotational speed of the axial roll motor can be matched to the feeding speed of the cylindrical material.

This is the rotation speed of the king roll motor and the cylinder (0
This is realized by giving an appropriate speed command to the axial roll motor using the index value Tx calculated from the stroke of 2XO4).

Further, by giving a command signal calculated from the strokes of the cylinders C02 and (04) to the servo mechanism of the cylinder (C2), the position of the axial rolling portion can always be maintained at an appropriate position. As a result, the burden on the operator is reduced and good rolling results can be achieved.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the side view and position control system of the rotary plastic processing apparatus showing the sensor arrangement in the present invention, Fig. 2 is a diagram showing the characteristic values of the axial roll, and Fig. 5 is a diagram showing the speed control system in the present invention. Figure 4 (a) is a plan view showing an overview of the mechanism of the rotary plastic processing device of the prior art, and Figure 4 (b)
is its side view. W...Work, (Ml) (M2) (M5)...
Motor, (KG) number/King roll, (MR)...Mandrail roll, (ARU)...Upper axial roll,
(ARD)-・lower axial roll, (cl) (C
2) (O3) (C4)...Cylinder, (2)...Circumferential rolling part, (4)...Axial rolling part, (SV
) -- Speed command device, (OPl) (OF2)...Arithmetic device.

Claims (1)

[Claims] A circumferential rolling section for cylindrical material consisting of a king roll and a mandrel roll arranged along a vertical axis that move relative to each other, and an axial rolling section consisting of conical upper and lower axial rolls for vertically rolling the cylindrical material. A rotary plastic processing apparatus capable of relative movement of the rotary plastic processing apparatus is provided with a sensor for detecting the position of the axial rolling part, a sensor for detecting the position of the cylindrical material, and a sensor for detecting the rotational speed of the king roll and the upper and lower axial rolls, In addition to providing a calculation device that commands the rotation speed of the upper and lower axial rolls by calculation from the king roll rotation speed signal, a calculation device is provided that commands the position of the axial direction rolling part by calculation from the position signal of the cylindrical material. Features: Speed control device for rotary plastic processing equipment.