JPS58145352A - Measuring device for pressure increasing time in injecting and filling in die casting machine - Google Patents

Abstract

PURPOSE:To provide a titled measuring device which collates data on total pressure and can measure an adequate pressure increasing time with simple constitution, by storing the data on the total pressure from the start up to end of injection in a storage circuit and operating the starting pressure for the pressure increase and the ending pressure for the pressure increase in accordance with the total data stored upon ending of the injection. CONSTITUTION:A pressure sensor for detecting the injection pressure of an injecting and filling material is beforehand provided in the die part of a die casting machine, and the pressure signal detected with the pressure sensor is supplied to a pressure measuring circuit 10, by which the signal is converted to a digital signal. On the other hand, the control signals for controlling a storage circuit 12, an arithmetic circuit 14 and a display circuit 16, respectively, are supplied to a control circuit 18. When the circuit 18 judges the end state of injection from the external signal, the circuit outputs the command for detecting the max. pressure value from the pressure data stored in the circuit 12. On receiving the command, the circuit 14 searches the total pressure data stored in the circuit 12 and detects the max. pressure thereof. A pressure increasing time is then calculated with the circuit 14 and is displayed with a circuit 16.

Description

DETAILED DESCRIPTION OF THE INVENTION This report relates to the #II device for measuring the injection filling external pressure time when pouring the metal into the metal in a die-casting machine.

Generally, the external pressure time at the injection pressure 11 is measured for the purpose of managing die casting production. Conventionally, this type of injection filling pressurization time measuring device measures injection pressure or casting pressure, and compares this measured injection pressure (casting pressure) with preset external pressure start injection pressure and pressure increase end injection pressure. It is known that there are friends that are constructed in this way. That is, K as shown in 1Iis.

It measures the time axis from the time when the injection pressure r value exceeds the pressure increase start value ht until it reaches the pressure increase end value FIK.

However, according to the above-mentioned measuring means, the pressure increase start value? It is required that one slice level preset consisting of * and external pressure end value - is appropriate. If the preset tWA is used, a situation will arise where measurement cannot be performed.

First, if the injection pressure V which is preset and higher than the nine external pressure start value Fs is adjusted before the section where IIK was measured, the external pressure time from that point will be measured.

Therefore, as a result of various studies in order to overcome the above-mentioned problems of the conventional injection filling external pressure time measuring device, the inventors of the present invention have developed an output signal of a pressure sensor that detects the injection pressure or casting pressure of the metal lid. The pressure data is converted into a required digital signal, and this pressure data is stored in a memory circuit over time from the start of injection to the end of injection, and when the injection is finished, the highest pressure value is detected from the nine data stored in the memory circuit. From this detected value, calculate the pressure increase start pressure and the pressure increase end pressure value, and calculate the appropriate pressure increase time by comparing all pressure data in the memory circuit in the reverse order of storage based on the calculation results. 51! Stop nine.

Therefore, it is an object of the present invention to store all pressure data from the start of injection to the end of injection in a memory circuit, and calculate the boost start pressure and boost end pressure based on the stored total pressure data at the end of injection. By comparing the above-mentioned total pressure data with
t - The injection filling external pressure time in the die casting meets the needle adjustment position t - KA.

In order to achieve the above object, the present invention includes a pressure sensor that detects the injection pressure of the mold and a positive pressure, and a pressure measurement circuit that converts the pressure signal 4# of the pressure sensor into a digital signal as a pressure measurement. , a memory circuit that temporarily stores pressure data ti1 from the start of injection to the end of injection obtained by the pressure measurement circuit, and detects the maximum pressure value from the dead metal pressure data stored in the memory circuit and calculates the maximum pressure value from this maximum pressure value. an arithmetic circuit that calculates a predetermined pressure increase start pressure and an external pressure end pressure by calculation, and calculates an external pressure time by comparing with all pressure data in a memory circuit; and a display circuit that displays the nine pressure increase times calculated by the arithmetic circuit. It is assumed that it is composed of t4I mold.

In the above-mentioned injection filling external pressure time measuring device, it is preferable that the storage of the pressure data in the storage circuit is executed by controlling the storage circuit via the control circuit with external signals instructing the start and end of injection, respectively. It is.

First, the arithmetic circuit detects the maximum pressure value from all the pressure data stored in the storage circuit in response to a command from the control 81iII, calculates the pressure increase start pressure and the pressure increase end pressure based on this maximum pressure value, and further calculates the pressure increase start pressure and the pressure increase end pressure. It is preferable to calculate the pressure increase time by comparing the calculated value with all the pressure data in the storage circuit in the opposite direction to the storage order.

Next, an embodiment of the injection filling external pressure time measuring device according to the present invention will be described in detail below with reference to the accompanying drawings.

The gco diagram is a block circular diagram showing one embodiment of the measuring device of the present invention. That is, in Figure 1s1, the measuring device of the present invention measures the injection pressure (lI correction pressure) on the pressure needle side @
@10, a memory circuit /J that stores the nine-pressure kademe measured by this pressure measuring circuit 10, and a memory I! llI/J
An arithmetic circuit 1 which calculates the moth high pressure value, a pressure increase end value and an external pressure start value from the stored data and calculates the pressure increase time, and a display circuit 4 which displays the external pressure time calculated by the arithmetic circuit 1-. , said memory @I3/J.

It is composed of an arithmetic circuit (1), a display (14t), and a control circuit (1) for controlling the display.

Therefore, in the present invention, the injection filling pressure increase time can be measured by the following method using a measuring device having the above-described circuit configuration.
llK accordingly.

First, a pressure sensor (not shown) for detecting the injection pressure (casting pressure) t of the injection filling material is installed in the metal moat part of the die-casting machine.The pressure signal detected by this pressure sensor is a pressure measurement. The signal is supplied to a circuit 10 and converted into a digital signal. On the other hand, for the control circuit ltK, the memory circuit /J
.

Appropriate external signals are supplied to generate control signals for controlling the arithmetic circuit l- and the display circuit 14t, respectively.

However, when the control circuit 11 determines the injection start state based on an external signal, it performs control to sequentially store the pressure data measured over time from the pressure gauge 111 [1 path 10 in the memory circuit/JK. When the control path determines the injection completion state t by an external signal, the Soki storage circuit/
A command for detecting the maximum pressure value from the 9 pressure data stored in JK is output to the calculation circuit 1. Thereby, the arithmetic circuit 14I searches all the pressure data stored in the memory circuit 1 and detects the highest pressure value. For convenience of explanation, dead metal pressure data stored in the storage circuit/co along with changes in time t is shown in a graph.
As shown in the figure.

Therefore, when the maximum pressure value is detected by the calculation circuit 14I- from all the pressure data stored in the storage circuit 1, the calculation circuit 1# detects the external pressure starting pressure PpK based on this maximum pressure value PpK. - and the pressure increase end pressure F are calculated based on the following equation (see Fig. 3).

Pressure increase starting pressure Pi - maximum pressure value Fp
1) External pressure end pressure Fl-4 high pressure value Pp X W II
...(2) However, X*1/ is set to the ninth appropriate value for measurement.In this way, the external pressure start pressure F@ and the boost end pressure Fl are calculated in the arithmetic circuit 1. Then, the arithmetic circuit /# is under the action of the control circuit /I, the Kido circuit /
JK Over time K11 The data storage order is reversed from the last stored data side to the first stored total pressure data.
Chi. As a result, the previously calculated 9 pressure increase end pressure FIK
External pressure starting pressure 1 was detected from the 9th point after detecting the rumbling pressure data.
The time up to the point in time when pressure data corresponding to FsK is detected, ie, the pressure increase time, can be measured. In this case, in the memory circuit /J, by setting a predetermined address tmm in the memory for each unit time, the nine-pressure cadence and time stored in each address can be related to the capacity crystal.

In this way, the nine boosting times tsI calculated by the arithmetic circuit 14I- can be immediately displayed on the display circuit 14.

As is clear from the nine embodiments described above, the measuring device of the present invention temporarily stores the total pressure data ti1 of the injection pressure (casting pressure) at the injection pressure 11 from the start of injection to the end of injection. The maximum pressure value is calculated from all the pressure data stored at the end of injection, and based on this maximum pressure value, the pressure increase start pressure and the pressure increase end pressure are calculated,
Next, the dead metal pressure data stored in the memory circuit is searched by iIK in a direction opposite to the storage order, and is compared with the calculation result to achieve an appropriate total external pressure time t1m. 4! In addition, as shown in FIG. 3, for example, as shown in FIG. Even if the pressure increase start pressure F. has previously been exceeded (4), accurate measurement of the pressure increase time can always be achieved without causing erroneous measurements.

The measuring 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 measurements caused by conventional preset paths. This makes it possible to improve the properties and reliability of this seed needle side device.

Although the preferred embodiment of the present invention has been described above, it goes without saying that various design changes can be made without departing from the spirit of the present invention.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram showing the measurement procedure of a conventional injection filling pressure increase time measuring device, Figure J is a block circuit diagram showing an embodiment of the injection filling pressure increasing time measuring device according to the present invention, and Figure 113 is a diagram showing the measurement procedure of the conventional injection filling pressure increase time measuring device. FIG. 3 is an explanatory diagram showing a measurement procedure of the device. 10...Pressure measurement circuit...Memory circuit...Arithmetic circuit...Display circuit/l...Control circuit

Claims (1)

[Scope of Claims] (1) A pressure sensor that detects the injection pressure or casting pressure of the mold, a pressure gauge AT circuit that converts the pressure signal of the pressure sensor into a digital signal as pressure data, and a pressure needle side circuit. A memory circuit that stores pressure data obtained from the start of injection to the end of injection over time, and detects a maximum pressure value from the dead metal pressure data stored in the memory circuit, and sets a predetermined external pressure starting pressure from this maximum pressure value. It consists of an arithmetic circuit that calculates the end pressure of boosting by calculation and calculates the boosting time by comparing it with the stored m1ss total pressure data, and a display circuit that displays the nine boosting times calculated by the calculation Fm1iI. An injection filling external pressure time meter is installed in die casting. (2. Claims 1) In the injection filling pressure boost time hand #Mtl described in 1, the storage of pressure data in the storage circuit is performed via the papermaking control circuit in response to an external signal that commands the start and end of injection. An injection filling external pressure time measuring device in die casting which is executed by controlling a memory circuit. The highest pressure value is detected from all the pressure data stored in the memory circuit according to a command from the memory circuit, the external pressure start pressure and the external pressure end pressure are calculated based on this highest pressure value, and the A device for measuring external pressure time for injection filling in die casting, which calculates pressure increase time by comparing pressure data in the opposite direction to the storage order.