JPS5985355A - Adjustment device for amount of molten metal in automatic charger for die casting machine - Google Patents

Abstract

PURPOSE:To provide a titled device which can easily adjust the amt. of a molten metal with high accuracy and good reproducibility by the constitution wherein the angle of inclination of a ladle is detected with a rotary encoder and a decoder and is compared with a set value and a motor for a ladle driving shaft is controlled. CONSTITUTION:The rotating angle of a driving shaft 3 is converted to a digital signal by a rotary encoder 5 and is fed to a decoder 6 to interpret in an automatic charger for a die casting machine which tilts a ladle 1 supported on an arm 2 via a chain 4 by the rotation of the shaft 3. The current value for the angle of inclination of the ladle 1 is indexed by the decoder and is outputted to a comparator 8. The comparator 8 is inputted with the set value for the inclination of angle from an input circuit 7 and compares the same with said current value. The signal corresponding to the difference thereof is fed to a motor control circuit 9 which controls the motor (not shown) for driving the shaft 3, thereby setting the position of the ladle 1 in either A or B.

Description

[Detailed description of the invention] The present invention is a die-casting machine (an automatic die-casting machine for supplying two-molten metal).
This invention relates to a hot water amount R'M adjusting device in a hot water supply device.

The amount of molten metal supplied to die casting 1k is an important factor that affects the quality of the product. Conventionally, when adjusting the amount of molten metal, a cam is attached to the drive shaft that moves the ladle 11 (i), and the cam turns on the limit switch. -01j'F and tilt the ladle at the required angle (two inclines) to adjust the molten metal scooping dragon.However, with such conventional equipment, the amount of molten metal cannot be quantitatively grasped, so there is no reproducibility, and There is the inconvenience of having to move and adjust the cam or beam switch, and the adjustment itself is difficult and time-consuming, and the accuracy is poor.

In view of the inconvenience and drawback of the conventional device, the present invention solves the inconvenience and drawback of the conventional device by converting the amount of molten metal (amount of pumped up), that is, the angle of inclination of the ladle, into an electric signal and numerically controlling it. The purpose of this invention is to provide a hot water amount adjustment device that can be used to adjust the amount of hot water.

An example of implementing the present invention will be described below with reference to Drawing C2.

Similar to the conventional device, the ladle (1) is supported by the arm (2) and is tilted so that the rotational movement (2) of the drive shaft (6) changes its inclination angle.

The drive shaft (3) is supported by the arm (2), and is rotated by the drive shaft motor (not shown) (2). If you use Radol (],) via Cheno (4) etc.
It is designed to move M tilted.

Therefore, if the rotation of the drive shaft (3) (two-part drive shaft (3)) is
A rotary encoder (5) for converting into a signal is connected, and a decoder 6) is connected to the rotary encoder (5).

As is well known, the rotary encoder (5) is connected to the drive shaft (3).
) converts the rotation angle of
, that is, the current tilt angle (current value) of the ladle (1).

Signal (current value) from decoder (6) and input circuit (7)
The signal (set value) from the comparator is compared by the comparator 6), and the signal from the comparator (from the motor control circuit 0 that controls the drive shaft motor) is activated to drive the drive shaft motor via the drive shaft motor. Q1. Rotate h 1i・+l+(3).

Input circuit (7) is the angle of inclination (set value) of ladle (1)
It is for inputting a set of data, and even if it is a set of digital switches, it will cost $2 (sequence circuit (7a) as shown in Figure 2)
and a memory circuit (7b).

The present invention provides such a drive shaft (2) for tilting the ladle (1).
3) (two connected rotary encoders 6), a decoder (6) that reads the signal of the rotary encoder (5), the current value of signal C from the decoder (6)), and an input circuit (7).
) of the comparator (8), which compares the signal (set value) from the
In the figure, when changing the angle of inclination of the ladle (1) at position (S)C shown by an imaginary line from the current position (E),
The current position (A) of the ladle (1) is input to the comparator (8) through the drive shaft (3) (rotary encoder (5) and decoder (6) connected in series), so the input circuit (7
) to the comparator (8), the comparator (8) compares the current position (current value) of the ladle (1) with the set value and issues a command to the motor control circuit 0). Then, the drive shaft motor operates and the drive shaft G) rotates by the required amount, and when the color of the ladle (1) changes (i.e., the current value of the ladle (1) is 0), the set value CB) When it matches, the drive motor stops and the ladle chain returns to the predetermined position 0.
Stop at 3).

In addition, by using the input circuit (7) as a memory circuit, automatic hot water supply (two necessary points (set inputs A, B, O)) is possible.

...) can all be controlled by this input circuit CI), and at the same time (2) conventional limit switches etc. are almost unnecessary.

In this way, the present invention enables numerical control by converting the amount of molten metal (amount to be pumped), that is, the angle of inclination of the ladle into an electric signal (2), so that the amount of molten metal can be grasped quantitatively (==), and therefore, it is repeatedly reproducible (- 1. Adjustment itself is extremely simple and remote control is possible, and accuracy is greatly improved.

Furthermore, by applying a memory circuit, it becomes possible to store and reproduce the best pattern, and the setup process can be significantly shortened.

Therefore, the intended purpose can be achieved.

[Brief explanation of the drawing]

The drawings are schematic diagrams showing one embodiment of the device of the present invention, and FIG. 2 is a block circuit diagram showing the embodiment on the same side. In the figure, (1) is a ladle, (3) is a drive shaft, (5) is a rotary encoder, (6) is a decoder, (7) is an input circuit, and (8) is a motor control circuit.Patent applicant Fuso Light Alloy Co., Ltd. Figure 2 Kazuo Wakasugi, Commissioner of the Patent Office (Examiner of the Patent Office) 1. Indication of the case: 1982 Patent Application No. 194233 2. Name of the invention: Hot water volume in automatic hot water supply device for die-casting machine adjustment device 3,
Relationship with person making the amendment 1 Patent applicant name (Name 'I (525)) Fuso Light Gokin Co., Ltd. 4, Agent address Hayakawa Pill, 5-14-7 Hakusan, Bunkyo-ku, Tokyo Telephone Tokyo +1) 4810531 (Representative) 1982 2
22nd of the month

Claims (2)

[Claims] (1) Compare the signal (current value) from the rotary encoder connected to the drive shaft that tilts the ladle, the decoder that reads the signal of the rotary encoder, and the 1 and -2 decoders with the signal (set value) from the input circuit. An automatic hot water supply system for a die-casting machine, characterized by comprising a comparator and a motor control circuit for controlling the drive shaft motor based on a signal from the comparator. (2) The hot water amount adjusting device according to claim (1), wherein the input circuit comprises a storage circuit.