KR20100072493A - Multiple measuring point type tension compression testing machine - Google Patents

Multiple measuring point type tension compression testing machine Download PDF

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Publication number
KR20100072493A
KR20100072493A KR1020080130917A KR20080130917A KR20100072493A KR 20100072493 A KR20100072493 A KR 20100072493A KR 1020080130917 A KR1020080130917 A KR 1020080130917A KR 20080130917 A KR20080130917 A KR 20080130917A KR 20100072493 A KR20100072493 A KR 20100072493A
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KR
South Korea
Prior art keywords
tester
movable plate
main body
compressive strength
capacity
Prior art date
Application number
KR1020080130917A
Other languages
Korean (ko)
Inventor
이천주
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이천주
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Filing date
Publication date
Application filed by 이천주 filed Critical 이천주
Priority to KR1020080130917A priority Critical patent/KR20100072493A/en
Publication of KR20100072493A publication Critical patent/KR20100072493A/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
    • G01N3/02—Details
    • 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
    • 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

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The multi-point tensile compressive strength tester of the present invention includes a tester body; A feed screw installed vertically rotatably on both sides of the tester main body; A drive unit installed inside the tester body to rotate the feed screw; A first table fixedly installed in the middle of the main body of the tester and having a coupling part for tension compression formed thereon; A first movable plate screwed to the transfer screw to move up and down by rotation of the transfer screw, and having a large load cell installed at an upper portion thereof, and a coupling portion for tension compression formed at a lower portion thereof; A second table fixed to the first table through an opening formed at one side of the main body of the tester, and having a coupling part for tension compression formed thereon; And a second movable plate fixed to the first movable plate through an opening formed at one side of the tester main body, a small capacity load cell installed at an upper portion thereof, and a coupling part for tension compression formed at a lower portion thereof.

Description

Multiple measuring point type tension compression testing machine

The present invention relates to a multi-point tensile compressive strength tester, and more particularly, to test the tensile and compressive strength of a specimen, a multi-point tensile tester can test both tensile and compressive strength of a large-capacity specimen and a small-capacity specimen with one tester. It relates to a compressive strength tester.

Generally, a tensile tester for testing the tension and a compression tester for testing the compression are used as testers for determining the mechanical and destructive properties of specimens made of materials such as metal, rubber, plastic, ceramic, and fiber.

In recent years, a tensile compression tester capable of simultaneously performing tension and compression has been proposed.

The tensile compression tester has a built-in load cell of a suitable capacity depending on the size of the test capacity of the specimen.

For testing large specimens, a load cell for large volume measurements is built-in, and for testing small specimens, a load cell for small volume measurements is embedded.

When a small-capacity specimen of about 1 ton is tested in a tensile compression tester with a load cell for measuring a large capacity of about 10 tons, it is difficult to obtain a precise test value because there is a large deviation between the capacity of the specimen and the measurement capacity of the load cell. For this reason, although the tensile compression tester for large capacity measurement and the tensile compression tester for small capacity measurement are provided separately, in this case, there is a problem that the economic cost burden is added.

On the other hand, in the tensile compression tester for large capacity measurement, after replacing the large capacity measurement load cell with a small capacity measurement load cell, even a small amount of specimens were tested, but the corresponding load cell must be separated and replaced every time according to the size of the specimen. Separation replacement work takes a long time, there is an inefficient problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has an object of providing a multi-point tensile compression tester having a very convenient and economical advantage because it can test both a small capacity specimen and a large capacity specimen with one tester. .

In order to achieve the above object, the multi-point tensile compressive strength tester according to the present invention includes: a tester body in which a feed screw is rotatably installed vertically on both sides; A large-capacity tensile compressive strength measuring unit installed at the center of the tester main body; A small capacity / extremely small capacity tensile compressive strength measuring unit installed on both sides of the tester body; And a drive unit for rotating the conveying screw to drive the large-capacity tensile compressive strength measuring unit and the small / ultra-capacity tensile compressive strength measuring unit.

The large-capacity tensile compressive strength measuring unit is fixed to the middle of the tester body, the first table is formed in the coupling portion for tensile compression on the top; And a first movable plate which is screwed to the transfer screw to move up and down by rotation of the transfer screw, in which a large-capacity load cell is installed and a coupling part for tension compression is formed at the bottom.

The small capacity / ultra small capacity tensile compressive strength measuring unit may be fixed to the first table through openings formed on both sides of the tester body, and a second table having a coupling portion for tensile compression formed thereon; And a second movable plate fixed to the first movable plate through openings formed at both sides of the tester body, a small capacity load cell installed at an upper portion thereof, and a coupling portion for tension compression formed at a lower portion thereof.

That is, the multi-point tensile compressive strength tester according to an embodiment of the present invention includes a tester body; A feed screw installed vertically rotatably on both sides of the tester main body; A drive unit installed inside the tester body to rotate the feed screw; A first table fixedly installed in the middle of the main body of the tester and having a coupling part for tension compression formed thereon; A first movable plate screwed to the transfer screw to move up and down by rotation of the transfer screw, and having a large load cell installed at an upper portion thereof, and a coupling portion for tension compression formed at a lower portion thereof; A second table fixed to the first table through openings formed at both sides of the tester main body, and a coupling part for tension compression formed thereon; And a second movable plate which is fixed to the first movable plate through openings formed at both sides of the tester main body, a small capacity / mini capacity load cell is installed at an upper portion thereof, and a coupling part for tension compression is formed at a lower portion thereof.

A high capacity test piece is tested between the first table and the first movable plate, and a small / low capacity test piece is tested between the second table and the second movable plate.

Guide rods are installed vertically on both sides of the tester body, and the first movable plate is guided by the guide rods.

In addition, the multi-point tensile compressive strength tester according to another embodiment of the present invention includes a tester body; A feed screw installed vertically rotatably on both sides of the tester main body; A drive unit installed inside the tester body to rotate the feed screw; A first table fixedly installed in the middle of the main body of the tester and having a coupling part for tension compression formed thereon; A first movable plate screwed to the transfer screw to move up and down by rotation of the transfer screw, and having a large load cell installed at an upper portion thereof, and a coupling portion for tension compression formed at a lower portion thereof; A second table fixed to the first table through an opening formed at one side of the main body of the tester, and having a coupling part for tension compression formed thereon; And a second movable plate fixed to the first movable plate through an opening formed at one side of the tester main body, a small capacity load cell installed at an upper portion thereof, and a coupling part for tension compression formed at a lower portion thereof.

As described above, according to the present invention, a large-capacity tensile compressive strength measuring unit is installed at the center of the tester main body, and a small-capacity tensile compressive strength measuring unit is installed at both or one side of the main tester body, thereby providing two or three stages at three measuring points. It is very convenient to use because it can test large-size specimens, small-size specimens and very small specimens together, and it is very economical to test specimens of various capacities with one tester.

Hereinafter, a multi-point tensile compressive strength tester according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a multi-point tensile compressive strength tester according to an embodiment of the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is a plan view of FIG. 1, and FIG. 4 is a left side view of FIG. 1. .

1 to 4, the multi-point tensile compressive strength tester 100 according to an embodiment of the present invention includes a tester main body 110 in which a feed screw 111 is rotatably installed vertically on both sides thereof; A large-capacity tensile compressive strength measuring unit (120) installed at the center of the tester body (110); A small-capacity tensile compressive strength measuring unit 130 installed on the right side of the tester main body 110; And a driving unit 140 for rotating the transfer screw 111 to drive the large-capacity tensile compressive strength measuring unit 120 and the small-capacity tensile compressive strength measuring unit 130.

The large-capacity tensile compressive strength measuring unit 120 is fixed to the middle of the tester body 110, the first table 121 is formed in the coupling portion 121a for tensile compression in the upper portion; And a screw coupled to the transfer screw 111 to move up and down by rotation of the transfer screw 111, and a large load cell 123a is installed at an upper portion thereof, and a coupling portion 123b for tension compression is disposed at a lower portion thereof. And a first movable plate 123 to be formed.

The small-capacity tensile compressive strength measuring unit 130 is fixed to the first table 121 through an opening 101 formed at one side of the tester main body 110, and a tensile compression coupling part 131a is formed at an upper portion thereof. Second table 131; And fixed to the first movable plate 123 through the opening 101 formed on both sides of the tester main body 110, a small capacity load cell 133a is installed on the upper side, the tension compression coupling portion 133b at the bottom A second movable plate 133 is formed.

In detail, the multi-point tensile compressive strength tester 100 according to an embodiment of the present invention includes a tester body 110.

On both sides of the tester main body 110, a feed screw 111 is installed vertically to be rotatable. The transfer screw 111 is coupled to the female screw nut 112 to be transportable.

The driving unit 140 is installed inside the tester body 110 to rotate the transfer screw 111.

The driving unit 140 includes a driving motor (servo motor) 141 for generating a driving force, a reduction gear 142 installed on the driving motor 141, the reduction gear 142, and one side feed screw 111. ) Is installed at the lower portion of the first table 121 and the coupling belt 145 for connecting the coupling 143, the pulley 144 fixed to the lower end of the transfer screw 111, and each other. And a guide roller 146 for guiding the timing belt 145.

A pedestal 103 and a caster 105 are installed on the bottom surface of the tester main body 110.

The pedestal 103 can adjust the horizontal and the height of the tester body 110, the caster 105 is installed to move the tester body 110.

A first table 121 is fixedly installed in the middle of the tester main body 110, and a coupling part 121a for tension compression is formed on the first table 121.

Above the first table 121, the first movable plate 123 is screwed to the transfer screw 111 so as to be elevated by the rotation of the transfer screw 111.

A large load cell 123a is installed on an upper portion of the first movable plate 123, and a coupling portion 123a for tensile compression is formed on a lower portion of the first movable plate 123.

Guide rods 115 are vertically installed on both sides of the tester main body 110, and the first movable plate 123 is guided by the guide rods 115.

In addition, the second table 131 is fixed to the first table 121 by the bolt B through the opening 101 formed at one side of the tester main body 110. Tensile compression coupling portions 131a are formed on the second table 131.

The second movable plate 133 is fixed to the first movable plate 123 by bolts B through openings 101 formed at both sides of the tester main body 110.

A small capacity load cell 133a is installed at an upper portion of the second movable plate 133, and a coupling portion 133b for tensile compression is formed at a lower portion of the second movable plate 133.

Tensile chuck 4 or compression chuck 7 may be selectively mounted on the tensile compression coupling parts 121a, 123a, 131a, and 133a according to a tensile or compression test.

The large-capacity specimen is tested using the first table 121 and the first movable plate 123, and the small-capacity specimen is tested using the second table 131 and the second movable plate 133.

Here, the criterion for distinguishing the large-capacity test from the small-capacity test is, for example, 5 to 10 tons or less is defined as a large capacity test, and 1 to 5 tons is defined as the small capacity test.

Referring to the operation of the multi-point tensile compressive strength tester 100 according to an embodiment of the present invention configured as described above are as follows.

When a large-capacity specimen of 5 to 10 tons or less is to be tensile or compression tested, the large-scale tensile compressive strength measuring unit 120 is used. That is, the tension chuck 4 or the compression chuck 7 is selectively coupled to the tension compression coupler 121a of the first table 121 according to the tension or compression test.

When the feed screw 111 is rotated by the operation of the driving unit 150, the first movable plate 123 is lifted and the large-capacity specimen is tensioned or compressed.

When the small-capacity specimens of 1 to 5 tons or less are to be tensile or compression tested, the small-capacity tensile compressive strength measuring unit 130 is used. That is, the tension chuck 4 or the compression chuck 7 is selectively coupled to the tension compression coupler 131a of the second table 131 according to the tension or compression test.

When the feed screw 111 is rotated by the operation of the driving unit 150, the first movable plate 123 is lifted and the small-capacity test piece is tensioned or compressed.

Looking at the power transmission process of the drive unit 140, when the drive motor (servo motor) 141 is rotated, the reduction gear 142 moderately slows the rotation of the drive motor 141, one side feed screw Rotate 111. At this time, the other side feed screw 111 is rotated by the timing belt 145 at the same speed.

When the feed screw 111 rotates in the forward or reverse direction, the first movable plate 123 and the second movable plate 133 are elevated.

On the other hand, Figure 5 is a front view showing a multi-point tensile compressive strength tester according to another embodiment of the present invention.

Referring to FIG. 5, the multi-point tensile compressive strength tester 200 according to another embodiment of the present invention includes a tester main body 210 in which feed screws 211 are vertically rotatably installed on both sides thereof; A large-capacity tensile compressive strength measuring unit 220 installed at the center of the tester main body 210; Left and right small-capacity tensile compressive strength measuring units 230 and 230 'installed at both sides of the tester main body 210; And a driving unit 240 for rotating the feed screw 211 to drive the large-capacity tensile compressive strength measuring unit 220 and the left and right small-capacity tensile compressive strength measuring units 230 and 230 ′.

The large-capacity tensile compressive strength measuring unit 220 is fixed to the middle of the tester body 210, the first table 221 is formed in the coupling portion 221a for tensile compression on the upper; And a first screw coupled to the transfer screw 211 to move up and down by the rotation of the transfer screw 211, wherein a large load cell 223a is installed at an upper portion thereof, and a coupling portion 223b for tension compression is formed at a lower portion thereof. A movable plate 223 is provided.

The left small-capacity tensile compressive strength measuring unit 230 is fixed to the first table 221 through an opening 201 formed on the left side of the tester main body 210, and a tensile compression coupling portion 231a is formed on the upper portion thereof. A second table 231; And fixed to the first movable plate 223 through the opening 201 formed on the left side of the tester main body 210, a small capacity load cell 233a is installed on the upper portion, the tension compression coupling portion 233b at the bottom It is provided; a second movable plate 233 is formed.

Here, the left small capacity tensile compressive strength measuring unit 230 is used to tensile or compression test a small capacity specimen of more than 1 to 5 tons.

The right small-capacity tensile compressive strength measuring unit 230 ′ is fixed to the first table 221 through an opening 201 formed at the right side of the tester main body 210, and a coupling portion 231a for tensile compression thereon. A second table 231 ′ in which is formed; And fixed to the first movable plate 223 through the opening 201 formed on the right side of the tester main body 210, a small capacity load cell 233a is installed on the upper side, the tension compression coupling portion 233b at the bottom Is provided with a second movable plate 233 '.

The right small-capacity tensile compressive strength measuring unit 230 ′ is used here for tensile or compression testing of very small specimens of at least 100 kilograms and less than 1 tonne.

Referring to the operation of the multi-point tensile compressive strength tester 200 according to another embodiment of the present invention configured as described above are as follows.

When a large-capacity specimen of 5 to 10 tons or less is to be tensile or compression tested, the large-scale tensile compressive strength measuring unit 220 is used. That is, the tension chuck 4 or the compression chuck 7 is selectively coupled to the tension compression coupler 221a of the first table 221 according to tension or compression.

When the feed screw 211 is rotated by the operation of the drive unit 250, the first movable plate 223 is raised and lowered or subjected to a tensile test or compression test.

If you want to tensile or compression test small-capacity specimens of more than 1 to less than 5 tons, the left small capacity tensile compressive strength measuring unit 230 is used. That is, the tension chuck 4 or the compression chuck 7 is selectively coupled to the tension compression coupler 231a of the second table 231 according to the tension or compression test.

When the feed screw 211 is rotated by the operation of the drive unit 150, the first movable plate 223 is raised and lowered to test the small capacity specimen.

And if you want to tensile or compression test the ultra-small capacity specimens of more than 100 kilograms and less than 1 ton, the ultra-low capacity tensile compressive strength measuring unit 230 ′ is used. That is, the tension chuck 4 or the compression chuck 7 is selectively coupled to the tension compression coupler 231a of the second table 231 according to the tension or compression test.

When the feed screw 211 is rotated by the operation of the drive unit 150, the first movable plate 223 is raised and lowered or tested for a very small amount of specimen.

As such, the rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and those skilled in the art can make various modifications within the scope of the claims. It is self evident.

1 is a perspective view showing a multi-point tensile compressive strength tester according to an embodiment of the present invention

FIG. 2 is a front view of FIG. 1

3 is a plan view of FIG.

4 is a right side view of FIG.

5 is a front view showing a multi-point tensile compressive strength tester according to another embodiment of the present invention

* Description of main parts

4: tension chuck

7: compression chuck

100: multi-point tensile compressive strength testing machine

101: opening

103: pedestal

105: caster

110: body

111: feed screw

112: female nut

115: guide rod

120: large-capacity tensile compressive strength measuring unit

121: the first table

121a: joint for tensile compression

123a: large load cell

123b: tension compression joint

123: first movable plate

130: small-capacity tensile compressive strength measuring unit

131: second table

131a: joint for tensile compression

133: second movable plate

133a: small capacity load cell

133b: tension compression joint

140: drive unit

141: drive motor

142: reduction gear

143: coupling

144: pulley

145: timing belt

146: guide roller

B: bolt

Claims (7)

Tester body; A feed screw installed vertically rotatably on both sides of the tester main body; A drive unit installed inside the tester body to rotate the feed screw; A first table fixedly installed in the middle of the main body of the tester and having a coupling part for tension compression formed thereon; A first movable plate screwed to the transfer screw to move up and down by rotation of the transfer screw, and having a large load cell installed at an upper portion thereof, and a coupling portion for tension compression formed at a lower portion thereof; A second table fixed to the first table through openings formed at both sides of the tester main body, and a coupling part for tension compression formed thereon; And A multi-point tensile compressive strength tester including a second movable plate fixed to the first movable plate through openings formed at both sides of the tester body, a small capacity load cell installed at an upper portion thereof, and a coupling portion for tension compression formed at a lower portion thereof; . The method of claim 1, Test a large-capacity specimen between the first table and the first movable plate, A multi-point tensile compressive strength tester for testing a small capacity specimen between the second table and the second movable plate. The method of claim 1, Guide rods are installed vertically on both sides of the tester body, and the first movable plate is guided by the guide rods. A tester main body in which a feed screw is vertically rotatably installed at both sides; A large-capacity tensile compressive strength measuring unit installed at the center of the tester main body; Small-capacity tensile compressive strength measuring units installed on both sides of the tester body; And And a drive unit for rotating said feed screw to drive said high capacity tensile compressive strength measuring unit and said small capacity tensile compressive strength measuring unit. The method of claim 4, wherein The large-capacity tensile compressive strength measuring unit A first table fixedly installed in the middle of the main body of the tester and having a coupling part for tension compression formed thereon; And And a first movable plate screwed to the transfer screw to move up and down by rotation of the transfer screw, and having a large load cell installed at an upper portion thereof and a coupling portion for tension compression formed at a lower portion thereof. Strength tester. The method of claim 4, wherein The small capacity tensile compressive strength measuring unit A second table fixed to the first table through openings formed at both sides of the tester main body, and a coupling part for tension compression formed thereon; And A multi-point tensile compressive strength tester including a second movable plate fixed to the first movable plate through openings formed at both sides of the tester body, a small capacity load cell installed at an upper portion thereof, and a coupling portion for tension compression formed at a lower portion thereof; . Tester body; A feed screw installed vertically rotatably on both sides of the tester main body; A drive unit installed inside the tester body to rotate the feed screw; A first table fixedly installed in the middle of the main body of the tester and having a coupling part for tension compression formed thereon; A first movable plate screwed to the transfer screw to move up and down by rotation of the transfer screw, and having a large load cell installed at an upper portion thereof, and a coupling portion for tension compression formed at a lower portion thereof; A second table fixed to the first table through an opening formed at one side of the main body of the tester, and having a coupling portion for tension compression formed thereon; And A second movable plate fixed to the first movable plate through an opening formed at one side of the main body of the tester, a second movable plate having a small capacity load cell installed at an upper portion thereof, and a coupling portion for tension compression formed at a lower portion thereof; Testing machine.
KR1020080130917A 2008-12-22 2008-12-22 Multiple measuring point type tension compression testing machine KR20100072493A (en)

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Application Number Priority Date Filing Date Title
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103528890A (en) * 2013-11-08 2014-01-22 清华大学苏州汽车研究院（相城） Stretching and unloading testing device
CN103698213A (en) * 2013-12-29 2014-04-02 河北联合大学 Tension and compression test device and method for steel bar connection test piece
KR101425004B1 (en) * 2012-12-21 2014-08-13 강원대학교산학협력단 Horizontal type tension-compression tester
CN104142239A (en) * 2014-08-22 2014-11-12 苏州昌飞自动化设备厂 Buffer pressurization mechanism of axle spring composite test device
KR20160066758A (en) 2014-12-03 2016-06-13 주식회사 포스코 Apparatus for supplying test specimen of tention tester
KR101649451B1 (en) 2015-10-21 2016-08-18 정재성 Universal testing machine with muti-axis
KR101654685B1 (en) * 2015-10-15 2016-09-22 신한산업 (주) Inspect equipment keg filler strain
CN109374412A (en) * 2018-11-06 2019-02-22 刘娟 A kind of new fiber materials strength test device
KR20190134140A (en) 2018-05-25 2019-12-04 주식회사 메이크순 Tensile and Compression Tester for 4 Directional bracing
CN114235608A (en) * 2021-12-27 2022-03-25 苏州美山子制衣有限公司 Static stretching device
KR102390945B1 (en) 2022-01-20 2022-04-28 피앤피테스터 주식회사 Universal testing machine
CN114544327A (en) * 2022-03-03 2022-05-27 常州迪合精密机械有限公司 Detection device for tensile strength of tool bit and use method thereof

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101425004B1 (en) * 2012-12-21 2014-08-13 강원대학교산학협력단 Horizontal type tension-compression tester
CN103528890A (en) * 2013-11-08 2014-01-22 清华大学苏州汽车研究院（相城） Stretching and unloading testing device
CN103698213A (en) * 2013-12-29 2014-04-02 河北联合大学 Tension and compression test device and method for steel bar connection test piece
CN104142239A (en) * 2014-08-22 2014-11-12 苏州昌飞自动化设备厂 Buffer pressurization mechanism of axle spring composite test device
KR20160066758A (en) 2014-12-03 2016-06-13 주식회사 포스코 Apparatus for supplying test specimen of tention tester
KR101654685B1 (en) * 2015-10-15 2016-09-22 신한산업 (주) Inspect equipment keg filler strain
KR101649451B1 (en) 2015-10-21 2016-08-18 정재성 Universal testing machine with muti-axis
KR20190134140A (en) 2018-05-25 2019-12-04 주식회사 메이크순 Tensile and Compression Tester for 4 Directional bracing
CN109374412A (en) * 2018-11-06 2019-02-22 刘娟 A kind of new fiber materials strength test device
CN109374412B (en) * 2018-11-06 2020-12-01 清远市毅通织造有限公司 Novel fiber material strength test device
CN114235608A (en) * 2021-12-27 2022-03-25 苏州美山子制衣有限公司 Static stretching device
KR102390945B1 (en) 2022-01-20 2022-04-28 피앤피테스터 주식회사 Universal testing machine
CN114544327A (en) * 2022-03-03 2022-05-27 常州迪合精密机械有限公司 Detection device for tensile strength of tool bit and use method thereof

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