KR101770756B1 - Tensile strength testing system - Google Patents

Tensile strength testing system Download PDF

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Publication number
KR101770756B1
KR101770756B1 KR1020150166405A KR20150166405A KR101770756B1 KR 101770756 B1 KR101770756 B1 KR 101770756B1 KR 1020150166405 A KR1020150166405 A KR 1020150166405A KR 20150166405 A KR20150166405 A KR 20150166405A KR 101770756 B1 KR101770756 B1 KR 101770756B1
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KR
South Korea
Prior art keywords
unit
screw shaft
photographing unit
guide
base frame
Prior art date
Application number
KR1020150166405A
Other languages
Korean (ko)
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KR20170061414A (en
Inventor
우광식
Original Assignee
(주)신우기전
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Priority to KR1020150166405A priority Critical patent/KR101770756B1/en
Publication of KR20170061414A publication Critical patent/KR20170061414A/en
Application granted granted Critical
Publication of KR101770756B1 publication Critical patent/KR101770756B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/0028—Force sensors associated with force applying means
    • G01L5/0033—Force sensors associated with force applying means applying a pulling force
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/04—Chucks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0017—Tensile
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003—Generation of the force
    • G01N2203/005—Electromagnetic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/04—Chucks, fixtures, jaws, holders or anvils
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/04—Chucks, fixtures, jaws, holders or anvils
    • G01N2203/0411—Chucks, fixtures, jaws, holders or anvils using pneumatic or hydraulic pressure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0676—Force, weight, load, energy, speed or acceleration

Abstract

The tensile force testing system includes a base frame, a lower chuck disposed on the base frame for supporting one end of the specimen, a guide portion connected to the base frame and extending in one direction, a crosshead movable along the guide portion, A load cell arranged on the crosshead for detecting a tensile force applied to the specimen, a driving unit for moving the crosshead, a photographing unit movably arranged along the extending direction of the guide unit, And a control unit for controlling the photographing unit driving unit, the driving unit, the load cell, the photographing unit, and the photographing unit driving unit.

Description

{Tensile strength testing system}

Embodiments relate to a tensile force test system, and more particularly, to a tensile force test system capable of accurately securing images and information of a specimen deformed by a tensile force test and capable of stably supporting the specimen.

Generally, a tensile test system is a system that performs tensile force on a specimen and collects data related to deformation of the specimen due to tensile force.

For example, in a conventional tensile testing system such as a tensile test specimen measuring apparatus disclosed in Korean Patent Laid-Open Publication No. 2013-0019648, a method of detecting the size of a tensile force specimen using a light emitting sensor and a light receiving sensor is used. However, in the conventional tensile force testing system having such a configuration, it is difficult to precisely collect images, data, and information related to the breaking point related to the deformation of the specimen during tensile force application.

Korean Patent Laid-Open Publication No. 2013-0019648 (Feb.

An object of the embodiments is to provide a tensile test system that can accurately acquire images and information of a specimen deformed by a tensile force test.

Another object of the embodiments is to provide a tensile testing system in which a specimen can be stably supported during a tensile test.

The tensile force testing system according to one embodiment includes a base frame, a lower chuck disposed on the base frame to support one end of the specimen, a guide portion connected to the base frame and extending in one direction, A load cell connected to the upper chuck and disposed on the crosshead for sensing a tensile force applied to the specimen, a driving unit for moving the crosshead, and a drive unit for moving the crosshead along the extending direction of the guide unit. A photographing unit driving unit for moving the photographing unit, a driving unit, a load cell and a photographing unit, and a control unit for controlling the photographing unit driving unit.

The drive portion may include a first motor disposed in the base frame and a first screw shaft extending parallel to the guide portion and rotatably mounted to the base frame and rotated by the first motor, And a first screw hole screwed into the screw shaft.

The driving unit includes a second screw shaft extending in parallel to the guide unit and rotatably mounted on the base frame and rotated by the first motor, and a first power transmission unit for transmitting the driving force of the first motor to the second screw shaft And the crosshead may further include a second screw hole screwed into the second screw shaft.

The pulling force test system includes an upper frame connected to the other end of the guide portion on the opposite side of one end of the guide portion connected to the base frame, and a photographing unit guide portion extending parallel to the guide portion and connected to the base frame and the upper frame to movably support the photographing unit The photographing unit driving unit includes a photographing unit screw shaft extending parallel to the guide unit and rotatably mounted on the base frame and the upper frame, and a second motor disposed on the upper frame for rotating the photographing unit screw shaft .

The photographing unit may have a photographing unit screw hole screwed into the photographing unit screw shaft.

The photographing unit may further include a guide roller that rotates in contact with the surface of the guide portion.

The tensile force testing system may further comprise a lighting unit movably arranged along the extending direction of the guide portion, wherein the photographing unit driving portion includes a lighting unit screw extending parallel to the guide portion and rotatably mounted on the base frame and the upper frame, And a photographing and lighting unit power transmission unit for transmitting the driving force of the second motor to the lighting unit screw shaft.

The illumination unit may further include an illumination unit screw hole screwed into the illumination unit screw shaft and an illumination guide roller rotating in contact with the surface of the guide unit.

At least one of the upper chuck and the lower chuck includes a piston having one end connected to the base frame or the crosshead and having a hydraulic surface protruding from the outer surface to which hydraulic pressure is applied, and a piston surrounding the other end and the hydraulic surface of the piston, A cylinder tube coupled to the piston so as to be movable and enclosing a hydraulic surface; a cylinder tube having a wedge-shaped groove whose width is narrowed in a direction away from the other end of the piston at one end; A plurality of jaws which are coupled to the wedge-shaped grooves so as to come into contact with the ends of the other ends of the pistons and move toward the ends of the pistons to move away from the ends of the pistons to press the specimens; As shown in FIG.

In the tensile force testing system according to the above-described embodiments, the specimen can be stably supported by the upper and lower chucks while the tensile force is applied to the specimen.

Further, since the photographing unit and the illumination unit can be moved linearly in the direction parallel to the guide portion along the moving direction of the crosshead, an accurate image of the specimen deformed by the tensile force can be secured. In addition, the data related to the change in tensile force applied to the specimen by the load cell disposed on the crosshead can be accurately obtained.

1 is a schematic perspective view of a tensile testing system according to one embodiment.
2 is a perspective view showing the bottom of a portion of the tensile test system shown in Fig.
3 is a perspective view showing an upper surface of a part of the tensile test system shown in Fig.
Fig. 4 is a perspective view showing a part of a photographing unit of the tensile test system shown in Fig. 1. Fig.
Fig. 5 is a perspective view showing another part of the photographing unit of the tensile test system shown in Fig. 1. Fig.
6 is a perspective view showing some components including a crosshead and a lower chuck of the tensile test system shown in Fig.
7 is a perspective view of the lower chuck of the tensile test system shown in Fig.
8 is a cross-sectional view of the lower chuck shown in Fig.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that the terms "comprises" and / or "comprising" used in the specification are intended to be inclusive in a manner similar to the components, steps, operations, and / Or additions. The terms first, second, etc. may be used to describe various elements, but the elements should not be limited by terms. Terms are used only for the purpose of distinguishing one component from another.

Fig. 1 is a schematic perspective view of a tensile test system according to one embodiment, Fig. 2 is a perspective view showing a bottom surface of a part of the tensile test system shown in Fig. 1, Fig. 3 is a part Fig. 4 is a perspective view showing a part of the photographing unit of the tensile test system shown in Fig. 1, and Fig. 5 is a perspective view showing another part of the photographing unit of the tensile test system shown in Fig.

1 to 5 includes a base frame 10, a lower chuck 20 disposed on the base frame 10 to support one end of the test piece, A crosshead 40 capable of moving along the guide portion 30; an upper chuck 50 disposed on the crosshead 40; and an upper chuck 50 connected to the upper chuck 50 A load cell 60 disposed on the crosshead 40 for sensing a tensile force applied to the specimen, a driving unit 70 for moving the crosshead 40, A photographing unit driving unit 90 for moving the photographing unit 80 and a control unit 100 for controlling the driving unit 70, the load cell 60, the photographing unit 80 and the photographing unit driving unit 90, .

The tensile force testing system having the above-described configuration is configured such that the crosshead 40 moves along the guide portion 30 extending in one direction (Z-axis direction) from the base frame 10 to apply tensile force to the specimen, Which is a system capable of precisely performing a tensile test of a specimen.

2, the driving unit 70 includes a first motor 71 disposed in the base frame 10, a second motor 71 extending substantially parallel to the guide unit 30 and rotatable with respect to the base frame 10 And a first screw shaft 72 which is installed and rotated by the first motor 71. The first motor 71 is connected to the first screw shaft 72 by the speed reducer 75 and the driving force of the first motor 71 is transmitted to the first screw shaft 72 through the speed reducer 75, 1 screw shaft 72 rotates.

2, the driving unit 70 includes a second screw shaft 73 that is parallel to the guide unit 30 and is rotatably mounted on the base frame 10 and is rotated by the first motor 71, And a first power transmitting portion 74 for transmitting the driving force of the first motor 71 to the second screw shaft 73. [

A first sprocket 77 is connected to the first screw shaft 72 protruded from the lower portion of the base frame 10 and a second sprocket 73 is connected to the second screw shaft 73 protruded from the lower portion of the base frame 10. [ 78 are connected. Each of the first sprocket 77 and the second sprocket 78 is connected to the first power transmitting portion 74 and rotated by the first power transmitting portion 74.

An idle roller 79 is provided between the first sprocket 77 and the second sprocket 78 at the lower portion of the base frame 10 to adjust the tension of the first power transmitting portion 74. The first power transmission portion 74 is embodied as a belt or chain having gears engageable with the first sprocket 77 and the second sprocket 78, respectively.

1, the crosshead 40 includes a first screw hole 41 which is screwed to the first screw shaft 72 and a second screw hole 42 which is screwed to the second screw shaft 73 do.

The guide portion 30 may include a plurality of guide shafts 31, 32, 33, 34 extending substantially parallel to each other. 2, one end 31a, 32a, 33a, 34a of the guide shafts 31, 32, 33, 34 is connected to the base frame 10.

1 and 3, the other ends of the guide shafts 31, 32, 33 and 34 which are opposite to the ends 31a, 32a, 33a and 34a of the guide shafts 31, 32, 33 and 34 31b, 32b, 33b, and 34b.

Therefore, when the first motor 71 of the driving unit 70 is operated, the first screw shaft 72 rotates by the first motor 71. As the first screw shaft 72 rotates, the crosshead 40 screwed to the first screw shaft 72 can move linearly along one direction (Z-axis direction) in which the guide portion 30 extends have.

The first screw shaft 72 and the second screw shaft 73 protruded upward from the upper frame 15 in FIG. 3 may be coupled to the encoders 15b and 15e, respectively. The signals related to the rotational angles of the first screw shaft 72 and the second screw shaft 73 sensed by the encoders 15b and 15e are transmitted to the controller 100 shown in FIG. The position of the crosshead 40 can be controlled or the specimen can be tensioned based on the received signal.

The control unit 100 shown in FIG. 1 can be implemented in the form of a control computer, a control circuit board, a control computer, or software embedded in a circuit board. The control unit 100 includes a first motor 71 shown in Fig. 2, a second motor 91 shown in Fig. 1, a hydraulic system 120, and a control unit 80 electrically connected to the photographing unit 80 and the lighting unit 110 And can receive signals from such components or control the operation of components.

Referring to FIGS. 3 and 4, a photographing unit guide unit 37 is provided between the upper frame 15 and the base frame 10. The photographing unit guide portion 37 has photographing unit shafts 35 and 36 extending in a direction parallel to the guide portion 30. [ The photographing unit guide unit 37 performs a function of movably supporting the photographing unit 80. [

A photographing unit driving unit 90 is disposed in the upper frame 15. [ The photographing unit driving unit 90 includes a photographing unit screw shaft 92 extending parallel to the guide unit 30 and rotatably mounted on the base frame 10 and the upper frame 15, And a second motor 91 arranged to rotate the photographing unit screw shaft 92.

4, the photographing unit 80 includes a photographing unit frame 81 having a photographing unit screw hole 82 screwed to the photographing unit screw shaft 92. [ Further, the photographing unit frame 81 has a through-hole 87 through which the photographing unit shafts 35 and 36 pass. The photographing unit 80 is provided with a guide roller 83 which contacts and rotates with the surface of the guide portion 30.

The photographing unit frame 81 of the photographing unit 80 is provided with a lens 84 arranged to face the specimen and a camera 85 for receiving the light of the image inputted through the lens 84 to generate an image .

When the photographing unit screw shaft 92 is rotated by the above-described structure, the photographing unit screw shaft 92 is engaged with the photographing unit screw shaft 92 and is restricted to move in one direction only by the photographing unit shafts 35 and 36 80 linearly move along the extending direction of the guide portion 30 and the photographing unit guide portion 37. [

1 and 3, the photographing unit screw shaft 92 and the photographing unit shafts 35 and 36 supporting the photographing unit 80 are installed on one side of the upper frame 15, and the upper frame 15 An illuminating unit screw shaft 93 and illuminating unit shafts 38 and 39 for supporting the illuminating unit 110 are provided on the other side of the illuminating unit.

3, the photographing unit driving unit 90 disposed in the upper frame 15 includes a base frame 10 and a lighting unit (not shown) rotatably mounted on the upper frame 15, A unit screw shaft 93 and a photographing and lighting unit power transmission unit 94 for transmitting the driving force of the second motor 91 to the lighting unit screw shaft 93. [

In the illustrated embodiment, the photographing and lighting unit power transmitting portion 94 is made of a rubber belt and has a first roller 92r provided at the end of the photographing unit screw shaft 92 and a second roller 92r provided at the end of the lighting unit screw shaft 93 And connects the second roller 93r installed and the driving roller 91r rotated by the second motor 91 to each other.

On one side of the upper frame 15, a first support base 37f for rotatably supporting the imaging unit screw shaft 92 is provided. The first support table 37f also supports the imaging unit shafts 35,

3 and 4, illumination unit shafts 38 and 39 extending in a direction parallel to the guide portion 30 are provided between the upper frame 15 and the base frame 10. The illumination unit shafts 38 and 39 serve to movably support the illumination unit 110. [

On the other side of the upper frame 15, a second support table 38f for rotatably supporting the illumination unit screw shaft 93 is provided. The second support 38f also supports the illumination unit shafts 38, 39.

Referring to Fig. 5, the illumination unit 110 has an illumination unit frame 111 having an illumination unit screw housing 112 screwed onto the illumination unit screw shaft 93. Fig. The illumination unit frame 111 also has a through hole 97 through which the illumination unit shafts 38 and 39 pass. The illumination unit 110 has an illumination guide roller 113 that rotates in contact with the shafts 33 and 34 of the guide portion 30. [

The illumination unit frame 111 of the illumination unit 110 is provided with illumination 115 for irradiating illumination toward the specimen.

When the illumination unit screw shaft 93 is rotated by the above-described structure, the illumination unit shaft 93 is rotated by the illumination unit shafts 38, 39 engaged with the illumination unit screw shaft 93, 110 linearly move along a direction parallel to the direction in which the guide portion 30 extends. The photographing unit 80 and the illumination unit 110 are driven by the second motor 91 so that the photographing unit 80 and the illumination unit 110 can be linearly moved along the direction parallel to the extending direction of the guide portion 30. [ So that they can always be positioned facing each other.

6 is a perspective view showing some components including a crosshead and a lower chuck of the tensile test system shown in Fig.

The upper chuck 50 is disposed on the crosshead 40 linearly moving along the guide unit 30 and the lower chuck 20 is disposed on the base frame 10 at a position corresponding to the upper chuck 50 .

When the crosshead 40 moves upward along the guide portion 30 with the specimen connected to the upper chuck 50 and the lower chuck 20, a tensile force is applied to the specimen. In the crosshead 40, a load cell 60 connected to the upper chuck 50 for sensing the tensile force applied to the specimen is disposed.

FIG. 7 is a perspective view of the lower chuck of the tensile test system shown in FIG. 1, and FIG. 8 is a sectional view of the lower chuck shown in FIG. Referring to Figures 7 and 8, the structure of the lower chuck 20 is shown. The upper chuck 50 may have the same structure as the lower chuck 20 shown in Figs.

The lower chuck 20 includes a piston 21, a cylinder tube 25 surrounding the piston 21, jaws 28 coupled to the cylinder tube 25, and a handle 26.

One end (21r) of the piston (21) is connected to the base frame (10) by a flange (29). In the case of the upper chuck 50, one end 21r of the piston 21 is connected to the crosshead 40. The piston (21) has hydraulic surfaces (21a, 21b) protruding from the outer surface to which hydraulic pressure acts.

A cylinder tube (25) is coupled to the piston (21). The cylinder tube 25 can move up and down in FIG. 8 along the longitudinal direction of the piston 21, surrounding the other end 21t of the piston 21 and the hydraulic surfaces 21a and 21b. The cylinder tube 25 has a hydraulic chamber 25c surrounding the hydraulic surfaces 21a and 21b and filled with hydraulic fluid. Hydraulic oil is supplied from the hydraulic system 120 shown in Fig. 1 to the hydraulic chamber 25c.

The cylinder tube 25 also has a wedge-shaped groove 25g at one end portion 25t which is narrowed in the direction away from the other end 21t of the piston 21.

A plurality of jaws 28 having a shape corresponding to the wedge shaped groove 25g and arranged to abut the upper end of the other end 21t of the piston 21 are formed in the wedge shaped groove 25g of the cylinder tube 25 .

Each of the jaws 28 has a shape corresponding to the shape of the wedge shaped groove 25g and includes jaw bodies 28a and 28b contacting the upper end of the other end 21t of the piston 21, 27b which are coupled to the inside of the first, second, The inner surface of the wedge shaped groove 25g presses the jaw bodies 28a and 28b as the cylinder tube 25 moves along the piston 21 so that the jaw bodies 28a and 28b and the engaging portions 27a, 27b may move toward each other or away from each other.

When the hydraulic fluid is supplied to the space in contact with the hydraulic surface 21b on the lower side of the hydraulic chamber 25c shown in Fig. 8 with the specimen inserted between the engaging portions 27a and 27b, the cylinder tube 25 And moves in the direction toward the lower side with respect to the piston (21). The inner surface of the wedge shaped groove 25g of the cylinder tube 25 pushes the jaw bodies 28a and 28b as the cylinder tube 25 moves downward in Fig. The engaging portions 27a and 27b are moved toward each other so that the specimen inserted between the engaging portions 27a and 27b is fixed.

A handle (26) is coupled to the other end of the cylinder tube (25). The handle 26 has a lower cover 26a for supporting the other end of the cylinder tube 25 and a handle 26b attached to the lower cover 26a.

7, the engaging portion guide 29a is engaged with the side surfaces of the engaging portions 27a and 27b and the engaging portion 29a is engaged with the side surfaces of the jaw bodies 28a and 28b by the body fixing portion 29f. Respectively. Further, the body guide 29b is coupled to the side surface of the wedge-shaped groove 25g in the cylinder tube 25. The body guide 29b has a guide rail 29s coupled to a rail groove 28s formed on the side surfaces of the jaw bodies 28a and 28b to guide movement of the jaw bodies 28a and 28b.

The tensile force test system according to the embodiments of the above-described configuration moves the crosshead 40 along the guide portion 30 so that tensile force is applied to the specimen supported between the upper chuck 50 and the lower chuck 20 And the specimen can be stably supported by the upper chuck 50 and the lower chuck 20 while the tensile force is applied to the specimen.

Since the photographing unit 80 can move linearly in a direction parallel to the guide portion 30 along the moving direction of the crosshead 40 while the crosshead 40 is moving, An accurate image can be obtained. Further, the load cell 60 disposed on the crosshead 40 can accurately acquire data related to a change in tensile force applied to the specimen.

The illumination unit 110 moves linearly along a direction parallel to the extending direction of the guide portion 30 along the moving direction of the crosshead 40 while the crosshead 40 moves. The illumination unit 110 can irradiate the illumination light toward the specimen at a position corresponding to the photographing unit 80, so that a good image of the specimen can be obtained.

The construction and effect of the above-described embodiments are merely illustrative, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Accordingly, the true scope of protection of the invention should be determined by the appended claims.

10: base frame 70:
15: upper frame 71: first motor
15b, 15e: encoders 35, 36: photographing unit shafts
20: lower chuck 72: first screw shaft
21: piston 73: second screw shaft
21a, 21b: hydraulic surface 74: first power transmission portion
25: cylinder tube 75: speed reducer
25g: wedge-shaped groove 77: first sprocket
25c: Hydraulic chamber 38, 39: Lighting unit shafts
26b: handle 78: second sprocket
26a: lower cover 79: idler roller
26: Handle 80: photographing unit
28: JOE's 81: Shooting unit frame
27a, 27b: engaging portion 82: photographing unit screw hole
28a, 28b: jaw body 83: guide roller
28s: rail groove 84: lens
29a: Bottom guide 85: camera
29b: Body guide 87: Through hole
29f: Body fixing section 90: Photographing unit driving section
29s: guide rail 91r: drive roller
29: flange 91: second motor
30: guide portion 92r: first roller
31, 32, 33, 34: guide shafts 92: photographing unit screw shaft
31a, 32a, 33a, 34a: one end 93r:
31b, 32b, 33b, 34b: other end 93: lighting unit screw shaft
37f: first support frame 94: photographing and lighting unit power transmission unit
37: photographing unit guide portion 97: through-hole
38f: second support member 100:
40: Crosshead 110: Illumination unit
41: first screw hole 111: illumination unit frame
42: second screw hole 112: illumination unit screw life span
50: upper chuck 113: illumination guide roller
60: Load cell 115: Lighting
33, 34: shafts 120: hydraulic system

Claims (9)

A base frame;
A lower chuck disposed on the base frame to support one end of the specimen;
A guide portion connected to the base frame and extending in one direction;
A crosshead movably arranged along the guide portion;
An upper chuck disposed on the crosshead to support the other end of the specimen;
A load cell connected to the upper chuck and disposed on the crosshead to sense a tensile force applied to the specimen;
A first motor disposed in the base frame, and a first screw shaft extending parallel to the guide unit and rotatably mounted on the base frame, the first screw shaft being rotated by the first motor, ;
A photographing unit movably arranged along an extending direction of the guide portion;
An illumination unit movably disposed along an extending direction of the guide portion;
An upper frame connected to the other end of the guide portion on the opposite side of one end of the guide portion connected to the base frame;
A photographing unit guide unit extending parallel to the guide unit and connected to the base frame and the upper frame to movably support the photographing unit;
A photographing unit driver for moving the photographing unit and the lighting unit; And
And a control unit for controlling the driving unit, the load cell, the photographing unit, and the photographing unit driving unit,
The crosshead having a first screw hole threadably engaged with the first screw shaft,
The photographing unit driving unit includes a photographing unit screw shaft extending parallel to the guide unit and rotatably mounted on the base frame and the upper frame, a second motor disposed on the upper frame for rotating the photographing unit screw shaft, A lighting unit screw shaft extending parallel to the guide unit and provided to be rotatable with respect to the base frame and the upper frame, and a photographing and lighting unit power transmission unit transmitting the driving force of the second motor to the lighting unit screw shaft ,
Wherein the photographing unit includes a photographing unit screw hole screwed to the photographing unit screw shaft and a guide roller rotating in contact with the surface of the guide member,
Wherein the illumination unit includes an illumination unit screw hole screwed into the illumination unit screw shaft and an illumination guide roller which rotates in contact with the surface of the guide unit,
Wherein the screw shaft of the photographing unit supporting the photographing unit is installed at one side of the upper frame and the screw shaft of the lighting unit supporting the lighting unit is installed at the other side of the upper frame, Wherein the photographing unit and the illumination unit are positioned facing each other. delete The method according to claim 1,
The driving unit includes a second screw shaft extending in parallel to the guide unit and rotatably mounted on the base frame, the second screw shaft being rotated by the first motor, and the driving force of the first motor being transmitted to the second screw shaft Further comprising: a first power transmission portion
Wherein the crosshead further comprises a second threaded hole threadably engaged with the second screw shaft. delete delete delete delete delete The method according to claim 1,
At least one of the upper chuck and the lower chuck,
A piston having one end connected to the base frame or the crosshead and having a hydraulic surface protruding from an outer surface to which hydraulic pressure acts,
A hydraulic chamber which surrounds the other end of the piston and the hydraulic surface and is coupled to the piston so as to be movable along the longitudinal direction of the piston and which surrounds the hydraulic surface; A cylinder tube having a narrow wedge-shaped groove,
Shaped groove corresponding to the wedge-shaped grooves of the cylinder tube and being connected to the wedge-shaped grooves so as to come into contact with the ends of the other ends of the pistons and moving in a direction away from the end of the piston, A plurality of jaws,
And a handle coupled to the outside of the piston to support the other end of the cylinder tube.
KR1020150166405A 2015-11-26 2015-11-26 Tensile strength testing system KR101770756B1 (en)

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