JPS58145351A - Die opening and closing device - Google Patents

Abstract

PURPOSE:To provide a die opening and closing device which enables smooth automatic control, by so constituting the device that the die opening and closing operations of die opening and closing mechanisms in a die casting machine are accomplished by presetting the data relating to adequate flow rates of pressure oil and stroke positions. CONSTITUTION:A solenoid valve 14 and a proportional electromagnetic control valve 12 as a flow rate control valve are provided to hydraulic systems for operation of a hydraulic operator 10. On the other hand, the stroke position of the operator 10 is detected with a position sensor 22 and the data relating to flow rates, etc. of pressure oil is beforehand preset in a data setter 30. The above-described hydraulic systems are arithmetically controlled with an operating device 32 from the preset data and the data on stroke positions. As a result, the automatic die opening and closing are always accomplished smoothly without giving any impact upon the dies on starting or stopping of the die opening and closing operations.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for controlling the opening/closing operation of a die casting machine using its own weight.

Generally, a hydraulic operation S is used for the shutter closing mechanism in a die-casting machine. Therefore, when controlling the lid opening/closing operation of the door opening/closing mechanism using this hydraulic actuator, a large number of limit switches are provided to detect the opening/closing position of the metal while adjusting the throttle of the hydraulic opening circuit, etc. ζO-nime,
Regarding the conventional lid opening/closing control K11I, there is one point that makes the hydraulic circuit complicated during position adjustment of the limit switch. Hydraulic circuit Oa amount control in omii closing control may be 4 using a solenoid pulp and a manual throttle valve. That's the one thing that really shocks me.

Therefore, the inventors of the present invention have conducted various studies in order to overcome the problems of interlayer closing control in the conventional O*M opening/closing mechanism, and as a result, they have installed a solenoid pulp in the hydraulic system of a hydraulic actuator that performs a 1m closing operation. and a flow rate control valve, and on the other hand, a position (11) for detecting the stroke position for the hydraulic actuator is provided, and the general setting 1! ! Preset the data tube regarding the hydraulic flow rate and stroke I position of the hydraulic system, and perform the calculation to set the data before operation. By calculating the appropriate hydraulic flow rate from the preset data and the detected stroker position data, and adjusting the valve opening of the flow rate control valve based on the calculation result*, m 5I that the opening/closing control can be smoothly and automatically controlled and the above problems can be solved! I stopped it.

Accordingly, an object of the present invention is to provide an opening/closing control device that can smoothly and automatically control the closing operation of the mold opening/closing mechanism 0Il in a die-casting machine by presetting data regarding an appropriate hydraulic flow stroke position.

In order to achieve the above object, in the present invention, IIi
A position sensor detects the stroke position of the hydraulic actuator that performs the excitation operation, and a stroke sensor detects one-stroke position data based on the detection signal of the position sensor. A detector, a data setter that presets data related to the hydraulic flow rate and stroke position of the hydraulic system, and a data setter that compares the optical data preset in the data setter with the stroke position data detected from the stroke detector. and a calculator for calculating the hydraulic flow rate of the hydraulic pressure flow rate calculated by the calculator, and is configured to control a solenoid valve provided in the hydraulic system of the hydraulic operating device and control the opening of the flow rate control valve based on the hydraulic flow rate calculated by the calculator. Characterized by jin.

In the above-mentioned lid opening/closing control device, the data is generally fixed! sK is
It is preferable to prevent shock by presetting the rise data of the hydraulic pressure flow rate at the start of the test run and the data of the brake position and hydraulic flow rate at the time of stop.

Further, it is preferable to provide a flow rate sensor in the hydraulic system and perform feed-batter control of the hydraulic flow rate.

Further, it is preferable that the flow rate control valve is configured as a proportional electromagnetic control valve, and a valve opening detector tube is provided to perform feedback control of the valve opening. An embodiment of the control device will be described in detail below with reference to the attached 5ort.

FIG. 1 is a block circuit diagram showing one embodiment of the control device of the present invention. That is, in FIG. 311, reference numeral 1
0 indicates a hydraulic operating device that performs an interlayer closing operation, and for this hydraulic operating device IQK.

A hydraulic system 16 comprising a proportional electromagnetic control valve 12 and a solenoid valve 14 is connected. The hydraulic operating device 10 includes:
Ritter switches 1B and 20 are provided for setting backward and forward settings for the moving part, and a position center t22 is provided for detecting the stroke position. In front, a part of the hydraulic system 16 detects the hydraulic flow rate. Sui flow rate sensor 24 [
establish.

Hydraulic operation configured like this! In contrast to a10, the inventor's opening/closing control device includes a limit switch input detector 26 that detects the input state of the limit switch 18° 20 and a stroke detector 2B that detects the stroke position sound based on the detection signal of the 1st position upper 922. , a data setting device 30 that presets data for setting appropriate interlayer closing operation characteristics, a switch input detector 26, a stroke detector 28 . Data setting device 60 and flow rate sensor 2
Operation 11JS2 calculates the control value 1s for controlling the hydraulic pressure JllilS from the data IK from 4.

The solenoid valve operator 34 controls the solenoid valve 14 using the control value calculated by the calculator 62, and the proportional solenoid control valve 12t- uses the control value calculated by the calculator 32.
and a control valve operator 36 for controlling the valve. In addition, reference numeral 38 is.

This is the ninth external output interface that outputs the calculation results of the calculation unit 32 to an external device.

Therefore, in the present invention, the mold opening/closing control is performed by the control device having the above-mentioned circular-path configuration according to the following manual procedure.

First, the wrinkle opening/closing control is started by inputting a wrinkle opening/closing command from an external device to the nine arithmetic unit 32. Here, the arithmetic unit 32 controls the rise as follows.

- The solenoid valve 14 is turned on via the solenoid pulp operation @54f according to the command from the computing unit 32.

(2) The proportional electromagnetic control valve 12 is gradually opened ft-increased in proportion to the change in time or stroke position via the control valve operator 36 in accordance with the command of the calculation @[.

In this case, the data setter 5DK data is preset so that the valve opening 1e of the proportional electromagnetic control valve 12 has a predetermined slope at the target angle, as shown in FIG. 92, for example.

- At the same time as adjusting the valve opening degree of the proportional electromagnetic control valve 12, the hydraulic flow rate of the hydraulic system 16 is detected by the flow rate center t24, and the valve opens vertically at a time suitable for the predetermined flow rate preset in the data setting device 30! It-stop.

As described above, by controlling the start-up of the hydraulic operating device 10 using the computing unit 32, it is possible to effectively prevent a shock at the time of starting.

Next, during #1 opening/closing, the following keys preset in the data setting device 30 and the stroke detection! ! #28 Calculate the detected b stroke position data I! Control the hydraulic system 16 as described above while comparing with 32. Data setter SOK Preset data - ■ N speed switching stroke - / (n is 1 to arbitrary) ■ 47
2071m force (tc4kyyp@) In this case, the lIK in which the preset data and the stroker position data are intermittent performs the next sensing layer, that is, the data
For example, as shown in II 3 ■, perform 2 appropriate exchanges, change the hydraulic flow rate 4L <, change the solenoid valve 14. , and output through the corresponding external output signal tube external output interface 38t.

After that, when the brake position preset in the data setting @30 matches the stroke I position data, and at the moment of death, the hydraulic flow rate is proportional to the time or the change in the stroke 1 position, as shown in 4@. In this case, similarly to the above-mentioned rise control, the fall control to close the valve is performed by operation -s2.

As is clear from the nine embodiments described above, according to the present invention,
The hydraulic system for operating the hydraulic operation S is equipped with a solenoid valve and a proportional electromagnetic control valve as a flow rate control valve.On the other hand, a position sensor detects the stroke position of the hydraulic hydraulic actuator, and a data setting device is set in advance to determine the hydraulic flow rate, etc. By presetting the date and using the arithmetic unit to control the hydraulic system based on the preset date and the stroke position data, the interlayer closing operation can be started at the time of dark stop. Impact at-
Smooth automatic opening/closing control can be achieved at all times without causing any damage.

In the embodiment described above, seven data to be preset in the data setter are listed as follows.

t Each switching stroke in n continuous 2, each hydraulic flow rate 5 up to n speed, selection 4 of either low speed or high speed in J1, each rising date in n speed normal 5, brake position and falling shift data &Other External Outputs - A stroker that outputs an output from the rotor.In addition, in the present invention, feedback control of the hydraulic flow rate can be performed using the flow rate center and the stroke detector. In addition, a valve detector is provided in the proportional electromagnetic control valve 12, and a longitudinal signal obtained from this detector is fed back to the control valve operator 66 (indicated by a rupture in the iris 1m1). It is preferable to configure the device to perform feed-batter control.

Furthermore, the control device of the present invention has a memory function, an arithmetic function, and a control function, and can be easily configured using a microcomputer, etc., and prevents erroneous operation of the tube due to manual operation as in the past. Unfortunately, this kind of control device
It is natural that as performance improves, credibility also improves.

Although preferred examples of the present invention have been described above, it goes without saying that the design of the spears may be changed without departing from the spirit of the present invention.

[Brief explanation of the drawing]

Figure 1 is a block circuit diagram showing an embodiment of the interlayer closure control device according to the present invention, and Figure 182 is a block circuit diagram showing an example of the interlayer closure control device according to the present invention. 111 is a diagram of the operating characteristic curve of the hydraulic system at the time of 4-closed start,
SaW is an operating characteristic curve diagram of the hydraulic system during warm opening/closing using the control device of the present invention. Figure 4 is an operating characteristic curve diagram of the hydraulic system during interlayer closing operation using the control device of the present invention. 10... Hydraulic actuator 12... Proportional electromagnetic control valve 14... Solenoid valve 16... Hydraulic pressure
System 18.20... Liit switch 22... Position sensor? 24...Flow rate sensor 26.
... Lint switch input detector 28 ... Stroke detector 3o ... Data setting device 32 ... Calculator 34 ... Solenoid pulp operator 36 ... Control valve operator 3 days ... External output interface 7 Ace FIG, 1 External output FIG, 2 J [m ml

Claims (1)

[Claims] Yama A straw for a hydraulic operating device that opens and closes the lid! To detect the position, use the position t and 1 position centimeter. A stroke detector detects the stroke I position data from the detection signal, a data general electric appliance presets data related to the hydraulic flow rate and stroke position of the hydraulic system, and a data general electric appliance that presets data regarding the stroke position of the hydraulic system; The hydraulic flow rate of the hydraulic system is calculated by comparing the data detected from -I detection- with the strobe position data. A solenoid was provided to control the pulp and a weight control valve O valve JI
! A mold opening/closing control device, characterized in that it is configured to control a pipe. (In the opening/closing control device described in Section 1 of Section S of the 214I claim, the data I setter contains data on the rise of the hydraulic pressure flow rate at the start of the opening/closing operation, and data on the brake position and hydraulic flow rate at the time of stop. A waterfall opening/closing control device configured to prevent impact by presetting a fall data. B) Scope of Claims 41 In the mold opening/closing control device according to claim 1, a hydraulic system Kfjll amount 7t is provided, A mold closing control device not configured to perform feed-batter control of hydraulic flow rate. η) 4I Claims Iris In the Maro opening/closing control device described in item 1, the flow rate control valve is constituted by a proportional electromagnetic control valve, and is configured to provide a valve opening degree detection alt to perform feedback control of the valve opening degree. mold opening/closing control device.