TW201900980A - Shearing device and method of operating same - Google Patents

Abstract

In one aspect, a method of operation of a shearing device (1) with a shearing cylinder (3) rotating about a longitudinal axis (2) and shearing spirals (13) mounted on the shearing cylinder (3), a lower blade support (4) for supporting a lower blade (5) extending in parallel to the longitudinal axis (2), wherein a condition of the shearing device (1) is measured, and wherein a shearing point (16) on each shearing spiral (13) in which a material to be sheared guided between shearing spiral (13) and lower blade (5) is sheared tangentially to the shearing cylinder (3) moves continuously from an infeed end (6) to an outfeed end (7) of the lower blade (5) is disclosed. Further, a respective shearing device (1) is disclosed. To evaluate the operating condition of the shearing device it is proposed to measure the condition between the lower blade and the lower blade support.

Description

   Shearing device and operation method thereof   

A gist of the present invention relates to a method for operating a shearing device, comprising a shearing cylinder, rotating around a longitudinal axis, and a snail wire, mounted on the shearing cylinder, and a lower knife holder for supporting the lower knife to extend parallel to the longitudinal axis. The state of the shearing device, and it is guided between the snail line and the bottom. The cutting points on each snail line of the material to be cut are cut through the cutting cylinder according to the tangent direction and continuously moved from the feeding end of the lower knife to the discharging. end. The invention relates to a shearing device.

These methods and cutting devices are used to cut textiles, carpets, furs, furs and other fabrics, and in particular, uniform pile heights and fiber lengths can be obtained, respectively. A helical shearing device is installed on the shearing cylinder, and is integrated in the shearing machine. When the shearing machine is in operation, the shearing cylinder and the lower blade are rotated in a tangential direction with the scissors. The snail thread moves on the cutting edge of the lower knife and provides continuous cutting along the cutting distance of the lower knife. The fabric is supplied to the blade using the cutting table of the shearing machine, so that the part of the fabric exceeding the required pile height is guided through the snail thread and the lower blade, and then is cut.

According to known methods, the state of the shearing device is basically evaluated by the operator based on the stroke of the interaction result of the cutting sample, the cutting cylinder and the lower knife, and the operating noise of the shearing machine characteristics. The correction is mainly performed manually by the operator, especially the position of the lower knife relative to the scissors cylinder, which is performed by using pliers, fixing screws, or other mechanical adjustment elements.

WO 95/31596 A1, US 5,379,497 A and US 3,941,986 A propose to measure the height of the knife gap between the lower knife and the scissors cylinder on the cutting device, and adjust the height according to the measurement results.

As a background of the present invention, EP 1 798 011 A proposes to measure the pressure, distance or temperature, and position changes between the cutting and counting rolls of a rotary dresser. EP 1 442 652 B1 and EP 1 080 629 B1 propose to measure the vibration of the lower knife, or the current flowing through the knife gap, because they act separately to determine the height of the shredder and the knife gap, and adjust the height if necessary. EP 0 172 467 A1 recommends using a proximity sensor to measure the height of the harvester and the knife clearance.

Scientific research involves the temperature of the lower knife and the sound of the shears.

The object of the present invention is to measure the operating state of the shearing device.

Based on known methods, the present invention proposes to measure the state between the lower knife and the lower knife holder. In a gist, the measuring element between the lower knife and the lower knife holder is very close to the cutting point between the lower knife and the cutting cylinder, so it is the most important and sensitive position for evaluating the operating status of the cutting device. In another gist, the measuring element between the lower knife and the lower knife holder is isolated from all moving parts and protected from being affected during the cutting operation.

According to the method of the invention, the measurement preferably comprises a vibration measurement. During the shearing operation, when the snail thread mechanically slides above the lower knife, it will generate vibration and be transmitted to the components of the shearing device. These vibrations cause characteristic noise that operators know as they know in the art, and use them to evaluate operating conditions.

According to the vibration form, the balance quality, the number of worms and the cutting characteristics of the scissors can be determined. In addition, the characteristic vibration pattern can recognize the critical state of operation, that is, the slack snail line, before the shearing device is subsequently damaged.

Also, according to the method of the present invention, vibration is preferably measured at the feed end. The feed end is the first end of the shearing cylinder when the snail thread interacts with the lower cutter for the first time in operation. Shear knives are particularly vulnerable here because they interact with the lower knife.

In the method of the present invention, the measurement preferably includes temperature measurement. The lower knife uses frictional heating at the shear point between the lower knife and the snail wire in the operation of the shearing machine. At this point, the temperature may be much higher than 100 ° C, causing adverse effects on the fabric and damage to the knife. Temperature is also an important characteristic of the most suitable shearing device. The temperature of the lower knife may be too high, especially due to excessive contact force between the lower knife and the snail wire, the snail wire travels too wide above the lower knife, insufficient or missing lubrication of the contact line above the lower knife, and the cutting of the cutter barrel Caused by too fast.

Furthermore, according to the method of the invention, the temperature is measured at the discharge end. Here, the lack of lubrication is an initial effect.

In the method of the present invention, the measurement preferably includes a force measurement. By using the compression force between the lower knife and the lower knife holder, it is possible to identify the static imbalance of the shear tube relative to the lower knife, and the horizontal or vertical deviation of the longitudinal axis of the shear tube from the parallel position relative to the cutting stroke. Measurement of compressive force simplifies adjustments during initial start-up, maintenance, repair, and reactivation after repair and shutdown.

The dynamic measurement of the compression force makes it possible to evaluate the state of the shearing device during operation. Combining the measured values of temperature change, mechanical vibration and torque, you can determine the cutting behavior to the accurate data required for use.

Also, in these inventive methods, the force is measured at the feed end, the discharge end, and between the feed and discharge ends. Combining these three measurements provides the parallel relationship between the cutting cylinder and the lower knife, as well as the curvature of the cutting stroke. The state of the shearing device can be described in more detail by measuring the force elsewhere.

In the method of the invention, the measured state is preferably transmitted to an evaluation device. The data is transmitted to the usual evaluation device, which allows correlation of different measured values, storage of measured values, analysis of development over time, and generation of expectations.

Further, in such an inventive method, the status is transmitted wirelessly by analog or numerical values. In particular, mobile networks are used to wirelessly transmit to a central server to take advantage of the dense structures available in industrialized countries.

The evaluation device preferably can also evaluate the state in the method of the invention, and generate an instruction to change the geometric position of the scissors cylinder and / or the lower knife. The measurement data and operation instructions to the operator thus obtained can be prepared to be output on the screen of the machine control system. Static and dynamic operating states can be described and visualized based on measurement data.

Further, in such a method of the present invention, the position is automatically changed. Machine control can be controlled in accordance with the state of the defined target, and based on the measurement data, the machine is kept within specified limits.

In the evaluation of the method of the present invention, it is preferred to include measuring the driving torque of the rotary shear. In the conventional shearing machine, the shearing cylinder is driven by an electric motor. The driving power is controlled and adjusted by the transmission, often recording and testifying, and providing further processing of deviations or fluctuations in power consumption. This data can be read out quickly and easily through the hardware and software interfaces. In particular, it allows the combination of the aforementioned measurement of vibration state, temperature, and the compression force between the lower knife and the lower knife holder to comprehensively summarize the operating state.

Starting from the conventional shearing device, the invention proposes to position the measuring element between the lower knife and the lower knife holder. The shearing device of the present invention can realize the method of the present invention, and is also characterized by the advantages of the above method.

The measuring element of the shearing device of the present invention is attached to the lower knife holder. As long as the lower knife holder is made of machine steel, the mounting of the measuring element on the rack involves more effort than installing the measuring element on the hardened lower knife.

The method of the present invention and the shearing device of the present invention can simplify tasks such as initial activation, start-up after maintenance, calibration maintenance, repair and use, monitoring of static and dynamic conditions, optimization of cutting parameters and cutting efficiency, and prevention of static and dynamic damage And collision or damage monitoring.

1‧‧‧Shearing device

2‧‧‧ longitudinal axis

3‧‧‧ scissors

4‧‧‧ Lower knife rest

5‧‧‧ under the knife

6‧‧‧feed side

7‧‧‧ discharge end

8‧‧‧ Swing Bearing

9‧‧‧ hole

10‧‧‧ Pressure Sensor

11‧‧‧Acceleration sensor

12‧‧‧ temperature sensor

13‧‧‧ snail cut

14‧‧‧ adjusting screw

15‧‧‧Side

16‧‧‧cut point

The present invention will be described in accordance with specific examples. In the drawings: FIG. 1 is a cutting device of the present invention; and FIG. 2 is a detailed view of the cutting device of the present invention.

As shown in FIG. 1, the shearing device 1 of the present invention includes a longitudinal axis 2, a shear tube 3, a lower blade holder 4, and a lower blade 5. The scissors cylinder 3 is pivotally mounted around the longitudinal axis 2 at each of the feeding end 6 and the output end 7 of the bearing seat (not shown in the figure) by using a swing bearing.

The lower knife 5 includes twelve holes 9, each of which is inserted with a pressure sensor 10. The pressure sensor 10 is closely attached to the lower knife 5, and each measurement measures the compression force between the lower knife 5 and the lower knife holder 4.

The lower knife 5 is provided with an acceleration sensor 11 at a feeding end 6 and a temperature sensor 12 at a discharging end 7. The acceleration sensor 11 measures vibration, and the temperature sensor 12 measures the temperature of the shearing device 1.

The 24 spiral-shaped snail wires 13 are fixed to the cutting cylinder 3 at the feeding end 6 and the discharging end 7 by adjusting screws 14 fixed by the side plate 15.

When the shearing device 1 is operated, the shearing cylinder 3 and the snail wire 13 are rotated about the longitudinal axis 2 so that the shear point 16 where the snail wire 13 contacts the lower knife 5 is continuously moved from the feeding end 6 to the discharging end 7.

According to the measured values of the pressure sensor 10, the acceleration sensor 11, and the temperature sensor 12, and according to the driving torque and rotation speed of the shearing cylinder 3, the shearing device 1 can be obtained in the static and dynamic operation state and stored in the machine. The controller is transmitted to the server via the mobile network, where it is interpreted by a professional system. Machine controllers, mobile networks and servers are not shown in the figure.

The professional system decides the parameters that optimize the cutting performance and general state of the cutting device 1 according to the interpretation of the state values, and sends the setting parameters back to the machine controller. The machine controller automatically adjusts the rotation speed of the cutting cylinder 3 and the geometric position of the cutting cylinder 3 and / or the lower knife 5 according to the set parameters.

Claims (14)

    A method for operating a shearing device (1), the shearing device (1) has a shearing cylinder (3) rotating about a longitudinal axis (2), a snail wire (13) mounted on the shearing cylinder (3), and a lower A knife holder (4) supports the lower knife (5) and the lower knife holder (4) extending parallel to the longitudinal axis (2), wherein the method includes measuring the state of the shearing device (1) and cutting the snail line (13) And the lower knife (5) that cuts through the cutting cylinder (3) according to the tangential direction, guide the cutting point (16) on each snail wire (13) of the material to be cut, and continuously feed from the lower knife (5) The end (6) moves to the discharge end (7), which is characterized in that the state is measured between the lower knife (5) and the lower knife holder (4).         The method as claimed in the preceding paragraph, wherein the measurement includes a vibration measurer.         The method as claimed in the previous patent application, wherein the vibration is measured at the feed end (6).         A method as described in the foregoing patent application, wherein the measurement includes a temperature measurer.         The method as described in the previous patent application, wherein the temperature is measured at the discharge end (7).         A method as described in the foregoing patent application, wherein the measurement includes a force measurer.         The method as described in the previous patent application, wherein the force is measured between the feeding end (6), the discharging end (7), and between the feeding end (6) and the discharging end (7).         A method as in the aforementioned patent application, wherein the measurement status is transmitted to the evaluation device.         The method as described in the preceding patent application, wherein the status is transmitted wirelessly.         For example, the method of claim 8 or 9, wherein the evaluation device evaluates the status and generates instructions to change the geometric position of the scissors (3) and / or the lower knife (5).         The method of applying for the patent scope as mentioned in the previous paragraph, wherein the position is automatically changed.         A method as in the scope of the aforementioned patent application, wherein the driving torque of the shear cylinder (3) is measured by rotation and included in the evaluation.         A shearing device (1) having a bracket device, a shear tube (3) rotatable around the longitudinal axis (2) in the bracket device, and a snail wire (13) mounted on the shear tube (3), having The lower knife support (4) supports the lower knife (5) to extend parallel to the longitudinal axis (2), and has a measuring element to measure the state of the shearing device (1). When the shearing cylinder (3) rotates, the shearing wire ( 13) Between the lower knife (5) and the lower knife (5) that cut through the cutting cylinder (3) according to the tangent direction, guide the cutting point (16) of the material to be cut on each of the snail wires (13), and continue from the lower knife (5). The feeding end (6) moves to the discharging end (7), which is characterized in that the measuring element is arranged between the lower knife (5) and the lower knife holder (4).         The shearing device (1), such as the scope of the aforementioned patent application, wherein the measuring element is arranged on the lower knife holder (4).