CS265822B1 - Apparatus for checking elements controlling movement of a working machine - Google Patents

Abstract

The device is suitable for checking the elements controlling the movement of a working machine, especially in forming machines. The device consists of registers, a comparison circuit and evaluation circuits. The first terminal of the device is connected to the first input of the comparison circuit and simultaneously with the first inputs of the registers, the outputs of which are connected to the second inputs of the comparison circuit, the outputs of which are connected to the first inputs of the timing circuits, the outputs of which are connected to the inputs of the evaluation circuits. The second terminal of the device is connected to the second inputs of the registers.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for controlling the movement control elements of a working machine comprising registers, a comparator circuit and an evaluation circuit.

At present, a mechanical brake clutch system or an additional brake is used to control the movement of the working parts of the rigid parts provided especially in the forming machines.

The brakes and the clutch are controlled by a pressure medium such as air or oil. The outflow and inflow to the control parts is controlled by means of electro-pneumatic or electro-hydraulic valves, controlled by control systems via output circuits, most often power contact or contactless switches. Through this chain, the movement of the machine is started and blocked. Failure of any of the controls may result in machine movement or continuation, which may result in danger to the operator and to the machine itself. Often, the controls are duplicated to control the movement of working parts of machines with hazardous movements. Examples include hydraulic and pneumatic valves for clutch and brake control at the press. Nevertheless, there are dangerous uncontrollable failures of the controls that endanger the operator of the machine. These include, for example, the movement of the switching elements of the control system, interruption of the connection of the control elements to the control system, wear of various parts of the device, which may increase the reaction times of the control elements gradually.

The aforementioned disadvantages of the prior art are largely eliminated by the device control apparatus according to the invention, characterized in that the first terminal of the device is connected to the first input of the comparator circuit and simultaneously to the first register inputs whose outputs are interconnected. with the second inputs of the comparator circuit, the outputs of which are connected to the first inputs of the timing circuits, the outputs of which are connected to the inputs of the evaluation circuits. The second device terminal is connected to the second register inputs. Another object of the invention is that the second terminal of the device is connected to the second inputs of the timer circuits.

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- 2 The advantage of the machine control elements according to the invention is to significantly increase the control of all parts involved in the control of the working machine and thus to increase the safety of work and reduce the possibility of machine failure. condition of the machine's operating parts, eg brake wear etc. ·

BRIEF DESCRIPTION OF THE DRAWINGS The invention is illustrated in greater detail by the accompanying drawing, in which a device for controlling the movement control elements of a working machine is shown in block.

The element inspection device is provided with first and second terminals 1, 2. The first terminal 1 of the device is connected on the one hand to the first register inputs 3a. 3b ... 3n. the outputs of which are connected to the second inputs of the comparator circuit 4 and to the first input of the comparator circuit 4. The outputs of the comparator circuit 6 are connected to the first inputs of the Timer Circuits 5a. 5b .... 5n «whose outputs are connected to the inputs of the evaluation circuits 6». 6b. ... 6n. The second terminal 2 of the device is connected to the second register inputs 3a. 3b. ... 3n. Preferably, the second device terminal 2 is connected to the second inputs of the timer circuits 5a. 5b, ... 5a.

The instantaneous machine speed signal is applied to the first terminal 1 of the machine. The control pulse at the second terminal 2 of the device writes the instantaneous speed to the registers 3a ' 3b. 5b. The control impulses at the second terminal 2 of the device are derived from the control signal of the machine which actuates the electrical and mechanical parts of the machine, which results in a change in speed. The speed change is evaluated by the comparator circuit 6 based on the signals from the registers 3a outputs. 3b ... »3n ^{and the} signal on the first terminal 1.

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Once this rate change is evaluated, it evaluates the evaluation circuits 6a. 6b .... 6n state of the timing circuits 5a-5b ... 5n. If the state of the timing circuits 5a. 5b ...> 5_n outside the desired tolerance, evaluates the evaluation circuits 6a. 6b .... 6n this condition as a malfunction. When the timing circuits reach 5a. 5b .... 5n evaluates the evaluation circuits 6a, 6b, ... 6n if the desired speed change evaluated by the comparison circuit £ £ has occurred. operation of timing circuits 5a. 5b ... »5n and subsequent evaluation of the state by the evaluation circuits 6a, 6b .... 6n.

The device is suitable for inspecting the elements controlling the movement of working parts of machinery, especially in forming machines.

Claims (2)

SUBJECT OF THE INVENTION A device for monitoring the movement control elements of a working machine, comprising registers, a comparator circuit and an evaluation circuit, characterized in that the first terminal (1) of the device is connected to the first input of the comparator circuit (4) and simultaneously to the first register inputs (3a) , 3b, ... 3n), the outputs of which are connected to the second inputs of the comparator circuit (4), whose outputs are connected to the first inputs of the timing circuits (5a, 5b,. ». 5n), the outputs of which are connected to the inputs of the evaluation circuits. (6a, 6b, ... 6n), wherein the second device terminal (2) is coupled to the second register inputs (3a, 3b, ... 3n). Device for monitoring the movement control elements of a working machine according to claim 1, characterized in that the second device terminal (2) is connected to the second inputs of the timing circuits.