KR20140124698A - An apparatus for examining surface status of metallic and plastic materials - Google Patents

Abstract

The present invention relates to an apparatus for examining the surface status of metallic and plastic materials. More particularly, the present invention relates to apparatus for examining the surface status of metallic and plastic materials to check a surface status by applying a fictional force. An apparatus for examining the surface status of metallic and plastic materials includes a lower support unit formed on a lower surface; a middle support unit installed to face the lower support unit; an upper support unit which connects and fixes them; a first unit and a second unit; a first sensor installed to be attached to part of the first unit; a second sensor which controls a force applied to the first unit; and a control unit which controls a force applied to the first unit and the second unit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus for inspecting surface state of metallic and plastic materials,

This invention relates to an apparatus for inspecting the surface condition of metal materials and plastic materials, and in some countries, this apparatus is also called a buckle test apparatus. Particularly, the present invention relates to a test apparatus for examining the state of deformation such as scratches occurring on the surface of a specimen when a specimen is pulled in a horizontal direction with a vertical force applied to a metal specimen (steel plate) or a plastic specimen will be.

The conventional apparatus for this field is to examine various surface states applied to the surface of the specimen when the specimen is pulled in the direction perpendicular to the direction perpendicular to the specimen as mentioned above for a while Technology. However, in the conventional technique, only a measurement is performed in a state in which a force is applied vertically above the specimen and only a vertical force is applied to the specimen. There was no device that could check the surface condition of pulling the specimen. Therefore, it was necessary to develop a device capable of measuring the surface condition of the specimen.

Prior art documents in this field include KEPCO Registration No. 10-0716902 (registered on June 3, 2007) entitled " Evaluation System for Damage to Metallic Tissue and Evaluation Method for Damage to Metallic Tissue Using the Same. Another prior art document in this field is POSCO's Registered Patent No. 10-1038835 (registered May 27, 2011) "Defect Inspection System for Wire Rod".

It is an object of the present invention to provide a device capable of accurately checking the state of a specimen surface even when the specimen is pulled in various horizontal directions. That is, the object of the present invention is to examine and study the surface state of a metal material, a plastic material, or the like by applying a frictional force to the X-Y axis.

Another object of the present invention is to drive a surface condition inspection apparatus for a metallic material or a plastic material according to the present invention by analyzing the specimen structure and strength in the Y axis and generating a frictional force in a state where an appropriate load is applied to the Y axis And then to examine the surface condition of the specimen by friction by pulling the specimen along the X axis.

Other objects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

According to another aspect of the present invention,

For the specimen material, the structure and strength of the specimen are analyzed on the Y-axis, and friction force is generated on the surface of the specimen under appropriate load on the specimen in the Y-axis according to the analysis result. Then, the specimen is pulled on the X- The apparatus comprising:

A lower support defining a lower surface of the device;

An intermediate support mounted on the upper end of the upper lower support so as to face each other in a columnar manner;

An upper support resting on the upper two intermediate supports to connect and fix them;

A first means installed on an upper surface of the upper upper support for generating a frictional force on the specimen in the X axis direction;

Second means for applying a load to the specimen in the Y-axis direction;

A sample jig for placing the above specimen;

A first sensor for measuring a linear displacement amount of the frictional force by the first means and attached to a part of the first means;

A second sensor for measuring a vertical load by the first means and controlling a force applied to the first means by using the measured value;

A linear guide positioned between the upper intermediate supports and connected to a lower portion of the upper second sensor to guide the upper first means;

Control means for inputting a measurement signal of the second sensor to control a force applied to the first means and the second means of the apparatus;

Means for measuring the presence or absence of a coating applied over the specimen and the friction force when the coating is applied; And

A hydraulic supply means for supplying hydraulic pressure to the above apparatus

Respectively,

At this time, the frictional force is applied in the X-axis direction in the range of 0 ° to 90 ° in a state where a load is applied to the above specimen in the Y-axis direction,

The first material is a linear variable differential transformer (LVDT), the second sensor is a load cell, and the second material is a metal material. .

In this embodiment, a scratch test for examining a scratch on a surface of a specimen and an abrasion resistance evaluation of the specimen are performed. The upper control means includes a digital servo controller and a computer system. The digital servo controller measures data And the force applied to the first means or the second means for controlling the hydraulic pressure by controlling the force of the first means by controlling the servo valve by reading the measurement data of the first sensor.

The effects expected by the practice of the present invention are as follows:

First, the state of the metal or plastic material surface can be examined with the specimen pulled at various horizontal angles.

Second, the specimen can be pulled at an angle by a desired angle in the horizontal direction as well as in the horizontal direction, which allows inspection of the surface condition of the specimen much more than before.

Third, hydraulic actuators, digital servo motors and a combination of them are possible depending on the state of the specimen.

Fourth, the apparatus of the present invention has its own control, measurement and operation functions, and has compatibility to operate in conjunction with the automatic test measurement apparatus.

Fifth, the apparatus of the present invention can be manufactured in consideration of the stability of the operation duration and the device durability for each function.

1 is a perspective view of a preferred embodiment of an apparatus for inspecting the surface state of a metal material and a plastic material according to the present invention.
Fig. 2 is a configuration diagram of the inspection apparatus of Fig. 1; Fig.
3 is a block diagram of a control apparatus circuit of the inspection apparatus of FIG.

The pulling force of the specimen in the horizontal direction can be pulled only in the direction of 90 ° in the conventional case. However, according to the present invention, since the specimen can be pulled in a desired direction freely between 0 and 90 degrees, various specimen surface states can be measured compared with the conventional one. In this case, since the modulus of elasticity of the specimen becomes large, the pulling force of the specimen may be more severe than when the force is fixed in the horizontal direction.

Now, the construction and operation principle of the surface state inspection apparatus for a metal material and a plastic material according to the present invention will be described in detail with reference to the accompanying drawings.

1. Configuration of the Invention

According to the present invention, the specimen structure and strength are analyzed on the Y-axis of the specimen material, and friction force is generated on the surface of the specimen in a state where an appropriate load is applied to the specimen on the Y-axis according to the analysis result. To an apparatus for inspecting and analyzing the surface state of a specimen by friction. The apparatus of the present invention comprises: a lower support for forming a lower surface of the device; An intermediate support mounted on the upper end of the upper lower support so as to face each other in a columnar manner; An upper support resting on the upper two intermediate supports to connect and fix them; A first means installed on the upper surface of the upper upper support for generating a frictional force on the specimen in the Y-axis direction; Second means for generating a frictional force on the specimen in the X-axis direction; A sample jig for placing the above specimen; A first sensor for measuring a linear displacement amount of the frictional force by the first means and attached to a part of the first means; A second sensor for measuring a vertical load by the first means and controlling a force applied to the first means by using the measured value; A linear guide positioned between the upper intermediate supports and connected to a lower portion of the upper second sensor to guide the upper first means; Control means for inputting a measurement signal of the second sensor to control a force applied to the first means and the second means of the apparatus; Means for determining the presence or absence of a coating applied over the specimen and the friction force used when the coating is applied; And a hydraulic pressure supply means for supplying a hydraulic pressure to the apparatus. The direction of the frictional force applied to the upper specimen in the X-axis direction is adjustable in a range of 0 to 90 degrees.

Now, with reference to the accompanying drawings, the principle of operation of the present invention will be described in more detail.

The apparatus for inspecting the surface state of a metal material according to the present invention is a device for generating a load on the Y-axis X-axis, and the magnitude of force applied to the specimen may vary depending on the strength and structure of the specimen. That is, when a high load is required, a hydraulic actuator is used as a load generating device, an electric servomotor is used when the load is low, a case where the frictional force of the specimen is excellent or a hydraulic actuator type and an electric servomotor are mixed It is possible to do. That is, according to the present invention, an electric servomotor is used or removed, and a hydraulic actuator is mounted or used in combination, if necessary. Particularly, in the present invention, when the test specimen has good lubricity, it is preferable to use an electric servomotor when applying a load in the vertical and horizontal directions. When changing these load generators according to specimen characteristics, it is necessary to change the controller accordingly.

In order to carry out the test for the surface condition inspection apparatus for a metal material according to the present invention, a suitable sample jig suitable for the size of the test specimen (sample) is required.

In order to obtain control and measurement values of the inspection apparatus according to the present invention, a PLC control and an analog controller can be used. However, in order to obtain precise control and measurement values, Patent Registration No. 10-0697587 " Device "is preferably used.

In order to control and measure the surface condition of the metal material according to the present invention, a load cell for measuring the load of each part is used, and a linear variable differential transformer (LVDT) Alternatively, a differential sensor DTF (differential transformer) sensor may be used. In the case of hydraulic pressure control, a servo valve is preferably used. In the case of controlling the servo motor, an inverter or a similar controller is preferably used.

When a hydraulic actuator is used, a hydraulic device having a proper capacity is required.

In addition, in order to control the apparatus for inspecting the surface state of the metal material according to the present invention, an industrial PC is used to create software to control the speed and load on the XY axis, and to measure data, load, displacement, , The displacement graph, the compressive force and the frictional force are measured and the frictional force value is determined.

1 is a perspective view of a preferred embodiment of an apparatus 1000 for inspecting the surface state of a metal material and a plastic material according to the present invention, Fig. 2 is a configuration diagram of the inspection apparatus of Fig. 1, Fig.

1, a left part is a perspective view of a specimen surface state inspection apparatus 1000 according to the present invention, a right upper part is a digital servo controller 1200 used in the apparatus 1000 of the present invention, (1100) used in the apparatus (1000).

That is, in FIG. 1, the vertical load applied to the specimen 300 by the load is measured through the thin cylindrical bar 500, and the measured value is transmitted to the digital servo controller 1200. When the hydraulic servo 1100 is operated, And controls the amount of hydraulic pressure applied to the linear actuator 700 of the apparatus 1000 to control the force in the vertical direction applied to the specimen. In order to control the force in the horizontal direction on the same principle, the amount of hydraulic pressure applied to the linear actuator 800 is controlled through another hydraulic servo valve 1320. Then, the fluid after the application of the force in the vertical and horizontal directions to the specimen 300 is collected and sent to the hydraulic feeder 1100, whereby the hydraulic feeder 1100 controls the hydraulic servo valves 1310 and 1320 by control, The amount of hydraulic pressure of the actuators 700, 800 of the device 1000 of the apparatus 1000 is adjusted.

When the force in the vertical and horizontal directions is small, digital servo motors 700 and 800 '(not shown) may be used without using the hydraulic actuators 700 and 800. In this case, the servo motors 700 and 800' .

The linear guide 400 acts to disperse the force due to eccentricity when applying a vertical and horizontal load.

A sample jig 900 is placed on the lower support 100 and the sample 300 to be tested is placed on the sample jig 900. 200 is an intermediate support, and 600 is an upper support.

An elongation sensor LVDT 710 and a load cell 720 control load in the vertical direction on the upper side of the actuator 700 and a servo valve The linear actuator 700 is controlled by the linear actuator 1310.

2, according to the present invention, the linear actuator 800 is directly coupled to the sample jig 900 to apply a load in the horizontal direction, and the elongation sensor LVDT 810 and the load cell 820 control the load in the horizontal direction And controls the linear actuator 800 with the Servo Valve 1320. That is, in this invention, the linear actuator in the horizontal and vertical directions has the same structure. Therefore, the force in the vertical direction and the force in the horizontal direction are functionally the same except for the position.

A load cell 720 is connected to the linear actuator 700 through the upper support 600 between the intermediate supports 200. Therefore, the load cell 720 measures a vertical load applied to the test piece 300 and uses the measured vertical load to control the actuator 700.

Meanwhile, since the state of the surface of the oil coating material coated on the specimen 300 through the apparatus 1000 of the present invention is highly affected by the horizontal force, this is a very important surface evaluation factor. The apparatus 1000 of the present invention also tests for scratches on the surface of the specimen. That is, scratching of the surface of the test piece 300 is tested. Currently, the standard value for scratching is different depending on the researcher. This is because there is no standard for this part yet.

And wear resistance of friction wear is very important in surface inspection. There is no specific standard for this part yet.

Since the control circuit of the present invention corresponds to a known technology, a further description will be omitted. A detailed description thereof can be readily implemented by anyone skilled in the art with reference to the applicant's patent registration number 10-0697587 "Multi-channel digital feedback controller ".

It should be understood by those skilled in the art that the present invention has been mainly described by taking metal materials as an example, but the device of the present invention can be applied not only to metal materials but also to plastic or similar materials.

<Examples>

The construction and operation principle of the present invention have been described above, and implementation of the embodiment based on the technical idea can be achieved by the following specifications. It should be noted, however, that this is merely one example according to the spirit of the present invention.

1. Device Overview

(1) This device has two axes X and Y, the X axis is a hydraulic actuator or a servo motor, and the Y axis is precisely controlled by a hydraulic actuator or a servo motor.

(2) The X axis measures the pulling force of the tool by controlling the load and displacement constantly. The Y axis is measured by applying a load perpendicular to the specimen and controlling the load and displacement. If special tests are necessary, the X and Y axes can be controlled by the program.

(3) The controller is programmed and controlled by a computer as a digital controller.

(4) The apparatus of the present invention includes a system for measuring the coefficient of friction and an additional apparatus accordingly.

2. Additional Facilities

Power: AC220V / 380V / 440V, 60Hz, 3ph.

3. Details

3-1 Mainframe

(1) Hydraulic actuator (compression)

- Capacity: 1 ~ 300Ton

(2) Servo motor (compressed)

- Capacity: 10g ~ 30ton

* It is selected according to load capacity and speed in hydraulic actuator or servo motor type.

(3) Hydraulic actuator for friction (friction)

- Capacity: 1 ~ 300Ton

(4) Servo motor for friction (compression)

- Capacity: 10g ~ 30ton

* It is selected according to load capacity and speed in hydraulic actuator or servo motor type.

(5) Load Cell (compression)

- Capacity: 10g ~ 300Ton

(6) Load cell for friction (friction)

- Capacity: 10g ~ 300Ton

(7) LVDT (compression)

- Range: 30 ~ 100mm

(8) LVDT (friction)

- Range: 10 ~ 300mm

(9) Main Body

- Type: 2 column type or 4 column type

* Selected according to load and speed

(10) Hydraulic Power Unit

- Related Oil Pressure: 10 ~ 500 l / min

(11) Inverter

- Capacity: 100W ~ 50KW

* It is selected according to load and speed in hydraulic actuator or servo motor type.

(12) Full Digital Feed Back Control System

- Control CPU: 2 Load system

- Amp For Servo Feed Back Control: 2 system

- Amp For D / C: 2 system

(13) Control & Software

- Operating & Measuring System

- Time-Load, Displacement graph

- PC: Dual core processor or higher

- Monitor: 17 "LED or more

(14) Jig & Tool set

As such, the present invention can be variously modified and can take various forms, and the detailed description of the present invention only describes specific embodiments thereof. It is to be understood, however, that this invention is not limited to the particular forms set forth in the foregoing description, but rather includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims. .

The technique of the present invention is applicable to a place where a bead of various materials occurs. And it is a device that is also used indispensably in steel mills. Therefore, this invention corresponds to a technology which is highly industrially applicable.

100: Lower support
200: intermediate support
300: The Psalms
400: Linear guide
500: bar for load addition
600: upper support
700,800: Linear actuator
710,810: Elongation Sensor LVDT
720,820: Load Cell
900: Sample jig
1000: Surface condition test equipment for metal and plastic materials
1100: Hydraulic feeder (hydraulic unit)
1200: Digital servo controller and measuring device
1310, 1320: Hydraulic servo valve

Claims (3)

For the specimen material, the structure and strength of the specimen are analyzed on the Y-axis, and friction force is generated on the surface of the specimen under appropriate load on the specimen in the Y-axis according to the analysis result. Then, the specimen is pulled on the X- The apparatus comprising:
A lower support defining a lower surface of the device;
An intermediate support mounted on the upper end of the upper lower support so as to face each other in a columnar manner;
An upper support resting on the upper two intermediate supports to connect and fix them;
A first means installed on an upper surface of the upper upper support for generating a frictional force on the specimen in the X axis direction;
Second means for applying a load to the specimen in the Y-axis direction;
A sample jig for placing the above specimen;
A first sensor attached to a part of the first means for measuring a linear displacement amount of the frictional force by the first means;
A second sensor for measuring a vertical load by the first means and controlling a force applied to the first means by using the measured value;
A linear guide positioned between the upper intermediate supports and connected to a lower portion of the upper second sensor to guide the upper first means;
Control means for inputting a measurement signal of the second sensor to control a force applied to the first means and the second means of the apparatus;
Means for measuring the presence or absence of a coating applied over the specimen and the friction force when the coating is applied; And
A hydraulic supply means for supplying hydraulic pressure to the above apparatus
Respectively,
At this time, the frictional force is applied in the X-axis direction in the range of 0 to 90 degrees in a state where a load is applied to the above specimen in the Y-axis direction,
The above sample material is composed of one of many materials including metal and plastic. In the case of this sample, various beads are applied. The first sensor is a linear variable differential transformer (LVDT) Wherein the load cell is a load cell. 2. The apparatus according to claim 1, wherein the first means is a linear actuator or a servo motor, and the second means is a linear actuator or a servo motor. The digital servo controller includes a digital servo controller and a computer system. The digital servo controller controls the load of the load cell based on the measurement data of the load cell, And control means for controlling the force applied to the first means or the second means for using the hydraulic pressure by controlling the force of the first means and controlling the servo valve by reading the measurement data of the first sensor, State check device.

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