JPH04328445A - Monitoring apparatus for amount of abrasion of clutch friction plate - Google Patents

Abstract

PURPOSE:To easily detect the abrasion amount of a liner or the like without performing disassembling and inspecting operations by comparing and computing the measured driving time of a crank with a set time, and generating an abnormality alarm when the driving time exceeds the set time. CONSTITUTION:A cutter 1 drives a crank mechanism via a V belt, 3, a flywheel 4, a clutch mechanism 5 and a reduction gear 6 in accordance with the rotation of a motor 2, thereby to cut a steel material M through the rotation of the crank. Meanwhile, a timer is provided at the surface of a monitoring device 21 in the operating room to measure and digitally display the necessary driving time of the clutch mechanism 5 and a brake mechanism 15 and the necessary driving time for one rotation of the crank, and to set a reference time. When the measured time exceeds the set reference time, an abnormality indicating lamp is turned ON and at the same time, a warning signal is generated to an abnormality warning device 24. Accordingly, the driving situation of each mechanism part of the cutter 1 can be monitored at all times, making it easy to know the presence/absence of an abnormality.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a wear amount monitoring device for a friction plate of a clutch/brake (hereinafter simply referred to as a clutch) of a cutting machine or the like that cuts long steel materials into predetermined dimensions. In detail, the amount of wear on the friction plate is determined by the clutch mechanism and brake.
This invention relates to a monitoring device that enables electrical measurement without disassembling the key mechanism.

0002

[Prior Art] The clutch and brake device of a cutting machine, which is the object of the present invention, is built into the machine body, so in order to know the wear status of the clutch or brake liner, it is necessary to Parts and covers must be removed. This disassembly work requires the handling of heavy objects and work at heights, which requires many workers. Furthermore, it is only after the liners of the clutches and brakes have worn out that the machine malfunctions after the wear has progressed considerably.

[0003] In order to examine the amount of wear on liners, the thickness of several liners and the gaps between liners are measured one by one using calipers, gap gauges, and the like. In order to make measurements, it was necessary to operate the clutch, and it was also time-consuming to reinstall previously removed air piping.

As mentioned above, the only way to know the amount of wear on the liner is to perform an extremely time-consuming overhaul and inspection. Even if it still had some life left in it, it was replaced with a new one. Furthermore, as the liner wears and the gap becomes wider, the impact shock when the clutch or brake is activated increases, causing abnormal wear of the liner and shortening its lifespan, causing sudden stoppages during production. This was hindering economic efficiency and productivity.

[0005]

[Problems to be Solved by the Invention] The present invention enables the wear amount of the clutch and brake liners of the cutting machine and the malfunction of the machine to be easily detected without carrying out overhaul work. The purpose is to improve economic efficiency and productivity by developing monitoring equipment that can monitor information.

[0006]

[Means for Solving the Problems] A clutch friction plate wear amount monitoring device according to the present invention operates a crank mechanism from a drive motor for a cutting machine for steel materials, etc. via a clutch mechanism to apply driving force to a cutting blade. transmits the driving force and brakes the driving force.
In a cutting machine that is braked by a key mechanism, there is a rotary limit switch that detects the position at each point in the rotation of the crank, and the required time between each point in the rotation of the crank by turning on the start switch and the detection signal of the rotary limit switch. a timer that measures and displays the time; and a monitoring device that compares and calculates the time required between each point of rotation of the crank set in advance and the measured time, and issues an abnormality alarm if the measured time exceeds the set time; It is equipped with an alarm device.

That is, the present invention provides a clutch/brake (hereinafter simply referred to as a clutch) device that transmits or brakes driving force from an electric motor to a load such as a cutting machine, which includes a crank mechanism driven by the rotation of the electric motor, , a limit switch that comes into contact with the crank and detects its rotation and outputs it as an electric signal, a clutch mechanism that transmits driving force to the crank mechanism, and a pressure member in the clutch mechanism that connects the clutch. a pressure mechanism to be connected to the clutch mechanism, a starting switch to start the clutch mechanism, a liner attached to the power transmission side of the clutch, and an output of the limit switch for the time required from starting the starting switch to operating the crank mechanism. A timer that measures based on a signal, a device that sets the time required from activation of the start switch to operation of the crank mechanism in advance, and a comparison calculation between the crank operation time and the set time, and if the operation time exceeds the set time. This is a clutch friction plate wear amount monitoring device characterized in that it is equipped with an alarm device that issues an abnormality alarm at the time of the clutch friction plate.

Specifically, a limit switch is installed near the crank mechanism of the cutting machine, operates in conjunction with the rotation of the crank, detects the point of rotation of the crank, and generates an electric signal to know the point of rotation of the crank. Send.

The clutch mechanism is provided on the input shaft of the reducer located in front of the crank mechanism of the cutting machine, and includes a plurality of disk-shaped friction plates (hereinafter simply referred to as clutch liners).
and a plurality of disk-shaped clutch plates (hereinafter simply referred to as clutch plates); and a plurality of disc-shaped clutch plates (hereinafter simply referred to as clutch plates); It consists of an air tube, etc., and provides intermittent driving force to the cutting blade from a constantly rotating electric motor.

[0010] The brake mechanism is provided on a side auxiliary shaft portion of the reducer located in front of the crank mechanism of the cutting machine,
Its structure is similar to the clutch mechanism described above, and after cutting the steel material, the clutch is released and then activated to brake the inertia of the crank mechanism, cutting blade, etc., and stop them at the stop position.

[0011] The start switch is a push button switch that is provided on the cutting machine operation console in the operator's cab and starts the cutting operation of the cutting machine.

[0012] The timer is installed in the following monitoring device in the driver's cab, and receives the electrical signal from the rotary limit switch to determine the operating time of the clutch mechanism and brake mechanism and the operating time of one crank rotation. Measure time. This timer digitally displays the measurement time with an accuracy of 1/100 seconds, and can also set a reference time, and if the measurement time exceeds the reference time, it will issue an alarm signal and turn on the abnormality indicator light. It has the function of lighting up. It is also possible to display the reference setting time. The set time is set to the time required to operate the clutch and brake parts, which is related to the thickness of the clutch liner of the clutch mechanism and the brake liner of the brake mechanism, and the time required for one rotation of the crank. .

[0013] The operating status indicator light is attached to the following monitoring device installed in the driver's cab, and displays the operating status of the clutch and brake and the status at the time of crank rotation.
It is lit by electrical signals from the electric circuit built into the tally limit switch, the pressure switch described below, and the monitoring device to display the operating status of each part of the cutting machine.

The monitoring device is installed in the driver's cab, has the timer and operating status indicator light on its surface, and has a built-in electric circuit necessary for controlling the device of the present invention, so that the driver can always check the disconnection. The operating status of each part of the machine can be monitored. It also sends an abnormality signal to the following abnormality alarm device.

[0015] The abnormality alarm device is installed in the operator's cab, etc., and is comprised of a rotating light and a buzzer, and notifies the operator of the occurrence of an abnormality in the operation of each part of the cutting machine.

The pressure switch is installed in the air piping that introduces compressed air to the clutch member and brake member, and controls that the pressure of the supplied compressed air is at a normal value.

[0017]

[Embodiment] An embodiment of the present invention will be described below. That is, in the apparatus of the present invention, as shown in FIG. 1, numeral 1 is a cutting machine that cuts a long steel material M into predetermined dimensions. It is driven via a mechanism 5 and a reduction gear 6. The cutting machine 1 also drives a crank mechanism 7 shown in FIG. 3 via a speed reducer 6, and the rotation of the crank 8 raises and lowers the lower blades 9A and 9B to cut a long steel material M into a predetermined size. It is something to do.

In the clutch mechanism 5, a liner 12 made of a friction material is attached to the power transmission side with the clutch plate 11 shown in FIG. 2 in between. Further, there is an air tube 13 as a member for connecting the clutch mechanism 5, and compressed air is introduced into the air tube 13 through a solenoid valve 14A to connect the clutch plate 11 and liner 12 to the air tube 13.
The expansion force presses the clutch to connect the clutch, or removes the compressed air from the air tube 13 to open the clutch.

The start switch 25 is a push button switch that is provided on the cutting machine operation console in the operator's cab shown in FIG. 1 and starts the cutting operation of the cutting machine 1. 1 opens, compressed air is introduced into the air tube 13 in the clutch mechanism 5, the clutch is connected, and the cutting machine 1 starts cutting operation. Further, at the same time as the activation switch 25 is pressed, a timer 22A shown in FIG. 4 for measuring the time required for connection of the clutch mechanism 5 starts measurement.

The brake mechanism 15 has the same structure as the clutch mechanism 5, and is provided on the side auxiliary shaft portion of the reducer 6, and after the clutch is released, the solenoid valve 14 is closed.
Compressed air is introduced through B to brake and stop the inertia operation after the speed reducer.

The device of the present invention is installed in contact with the crank 8 shown in FIG. 3, rotates in conjunction with the rotation of the crank 8, detects the rotation angle of the crank 8, and outputs it as an electrical signal. - A tally limit switch 10 is provided and its output signal is sent to a monitoring device 21 shown in FIGS. 1 and 4.

Timers 22A, 22B, 22C shown in FIG.
is provided on the surface of the monitoring device 21 in the driver's cab, and receives the electrical signal from the rotary limit switch 10 to determine the required operation time of the clutch mechanism 5 and brake mechanism 15 shown in FIG. 1 and FIG. 3. The time required for one rotation of the crank 8 is measured and displayed. This timer digitally displays the measurement time with an accuracy of 1/100 seconds, and can also set a reference time.If the measurement time exceeds the reference setting time, it lights up an error indicator and issues an alarm. It has the function of transmitting signals. It is also possible to display the reference setting time.

The operating status indicator light 23 shown in FIG. 4 is attached to a monitoring device 21 installed in the driver's cab, and monitors the operating status of the clutch mechanism 5, brake mechanism 15, and crank 8 shown in FIG. 1, as well as the pressure switch. Displays the operating status of 16A and 16B.

The monitoring device 21 is installed in the driver's cab, has the timers 22A, 22B, 22C and the operating status indicator light 23 attached to its surface, and has a built-in electric circuit necessary for controlling the device of the present invention. This allows the operator to constantly monitor the operating status of each mechanical part of the cutting machine 1. Further, an abnormality signal is transmitted to an abnormality alarm device 24 shown in FIGS. 1 and 4 below.

The abnormality alarm device 24 shown in FIGS. 1 and 4 is installed in the operator's cab, etc., and is composed of a rotating light and a buzzer, and alerts the driver to the occurrence of abnormal operation of each mechanical part of the cutting machine 1. This system allows the operator to immediately take appropriate abnormality measures, such as stopping the following material.

Pressure switches 16A and 16B shown in FIG.
is installed in the air piping that introduces compressed air to the clutch mechanism 5 and brake mechanism 15, and when the pressure of the supplied compressed air fluctuates, it affects the operating time of the clutch mechanism 5 and brake mechanism 15. Therefore, the pressure is controlled to be a normal value.

The method of knowing the amount of wear of the clutch liner 12 in the clutch mechanism 5 without carrying out an overhaul operation using the device of the present invention is as follows: This is done by measuring the time from when the button is pressed until the crank 8 starts rotating. That is, the start switch 25 is turned on, the solenoid valve 14A is opened, and the compressed air is introduced into the air tube 13 for press-connecting the clutch plate 11 and the clutch liner 12 in the clutch mechanism 5. is connected, the power from the electric motor 2 is transmitted via the reducer 6 and the crank mechanism 7, and the crank 8 begins to rotate, and the rotary limit switch 10, which is linked to this, detects that the crank 8 has moved out of the stop position. This is done by measuring the time until the electric signal is transmitted using a timer 22A.

Therefore, as the clutch liner 12 wears, the gap between the clutch plate 11 and the clutch plate 11 widens, so that the clutch engagement stroke increases, and the time measured by the timer 22A increases as the clutch liner 12 wears. A graph has been created that correlates the measurement time and wear amount when the liner thickness is new and at the wear limit, and the amount of wear on the liner can be determined by converting it from the measurement time of timer 22A. .

If the set time of the timer 22A is set to a time corresponding to the time when the liner thickness reaches the wear limit, the timer 22A will turn on the abnormality light and send an alarm signal when the liner thickness reaches the wear limit. The abnormality alarm device 24 is activated. By the way, the thickness of the new clutch liner in this example is 13.0mm.
The thickness at the wear limit is 4.0 mm, and the standard setting time is 0.60 seconds. If the measured time exceeds this time, the clutch liner is replaced with a new one by the above-mentioned alarm. In addition, since the device of the present invention allows the amount of wear on the liner to be determined without carrying out overhaul work, the gap between the liner and the clutch plate can be adjusted appropriately, which eliminates abnormal wear on the liner and extends its lifespan. It has increased about 5 times.

Furthermore, the method for determining the amount of wear on the brake liner in the brake mechanism 15 is the same as the method for determining the amount of wear on the clutch liner. That is, the rotary limit switch 10 detects that the cutting machine 1 has cut the cutting material M and the crank 8 has rotated to the point where the brake operation starts, operates the brake mechanism 15, and then starts the crank 8.
The timer 22B measures the time until the rotary limit switch 10 again detects that the rotation of the rotary limit switch 10 has been braked and has reached the stop position. Timer 22B
The functions such as issuing an alarm are the same as those of the timer 22A. By the way, the thickness of the brake liner in this example was 17.8 mm when it was new, and the thickness at the wear limit was 4.0 mm.The standard setting time was 2.00 seconds, and the measurement time exceeded this time. If this happens, replace the brake liner with a new one based on the above warning. Additionally, the life of the brake liner has been approximately doubled.

Furthermore, the device of the present invention also monitors the time required for one rotation of the crank 8 using a timer 22C. That is, the timer 22C measures the time from when the start switch 25 is pressed and the crank 8 begins to rotate until it completes one rotation and reaches the stop position, and if this time exceeds the reference setting time, the shear Mechanical defects such as poor bearings in each mechanical part, insufficient lubrication, etc. can be detected. timer 22
The function of C is similar to that of the timers 22A and 22B. Incidentally, the standard setting time in this embodiment is 4.00 seconds.

[0032]

Effects of the Invention As explained above, the clutch friction plate wear amount monitoring device of the present invention allows the wear amount of the clutch and brake liner of a cutting machine to be known and constantly monitored without any disassembly and inspection work. Since an alarm can be issued, it is no longer necessary to carry out disassembly and inspection work that requires multiple people. Since the gap between the liners can be determined from the amount of liner wear, it is possible to adjust it to an appropriate value, eliminating abnormal liner wear and extending the life of expensive liners by several times. In addition, since it is possible to know whether the operating status of the cutting machine is going well or not, the number of sudden breakdowns is reduced, which greatly contributes to improving economic efficiency and productivity, and is highly practical in industry.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view of the arrangement of a steel cutting machine and its auxiliary equipment according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of the inside of a clutch mechanism and a brake mechanism of a steel cutting machine according to an embodiment of the present invention.

FIG. 3 is a schematic side view of a steel cutting machine according to an embodiment of the present invention.

FIG. 4 is a schematic diagram showing the appearance of the arrangement of equipment of a monitoring device and the configuration of an abnormality alarm device according to an embodiment of the present invention.

[Explanation of symbols]

1 Cutting machine 2 Electric motor 3 V-belt 4 Flywheel 5 Clutch mechanism 6 Reducer 7 Crank mechanism 8 Crank 9A Upper blade 9B Lower blade M Cutting material 10 Rotary limit switch 11 Clutch plate (brake plate) 12 Liner 13 Air tube 14A Solenoid valve 14B Solenoid valve 15 Brake mechanism 16A Pressure switch 16B Pressure switch 21 Monitoring device 22A Timer 22B Timer 22C Timer 23 Operating status indicator 24 Abnormality alarm device 25 Starting switch

Claims (1)

[Claims] 1. A clutch/brake (hereinafter simply referred to as a clutch) device that transmits or brakes driving force from an electric motor to a load such as a cutting machine, comprising: a crank mechanism driven by the rotation of the electric motor; A limit switch that contacts and detects its rotation and outputs it as an electric signal, a clutch mechanism that transmits driving force to the crank mechanism, and a pressure member in the clutch mechanism that connects the clutch are connected by pressure contact. a pressure mechanism, a starting switch for starting the clutch mechanism, a liner attached to the power transmission side of the clutch, and a time required from starting the starting switch to actuating the crank mechanism based on the output signal of the limit switch. A timer measures the time, and a device that sets the time required from activation of the start switch to activation of the crank mechanism, compares and calculates the crank operation time with the set time, and issues an abnormality alarm if the operation time exceeds the set time. A wear amount monitoring device for a clutch friction plate, characterized in that it is provided with an alarm device that emits an alarm.