CN114002088B - Device and method for testing shear strength of welding seam of microwave device - Google Patents

Device and method for testing shear strength of welding seam of microwave device Download PDF

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Publication number
CN114002088B
CN114002088B CN202111299287.9A CN202111299287A CN114002088B CN 114002088 B CN114002088 B CN 114002088B CN 202111299287 A CN202111299287 A CN 202111299287A CN 114002088 B CN114002088 B CN 114002088B
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piece
test piece
measuring
adjusting
test
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CN114002088A (en
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王丹青
徐李刚
王杰
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Beijing Institute of Radio Measurement
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Beijing Institute of Radio Measurement
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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
    • G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
    • G01B5/06—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness
    • G01B5/061—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness height gauges
    • 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
    • G01N2203/0025—Shearing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Physics & Mathematics (AREA)
  • General 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)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention relates to a device and a method for testing the shear strength of a welding seam of a microwave device, which relate to the field of small-size part detection devices and comprise a base, a first adjusting and measuring piece connected with a compression block, a second adjusting and measuring piece and a pressing block. The base is provided with a test piece mounting cavity, the test piece is placed on the lower side of the compression block, the welding line is placed at a position between the compression block and the lower pressing block, the compression block and the second adjusting and measuring piece compress the test piece, meanwhile, the shearing area of the test piece is measured, and the external force acts on the lower pressing block, so that the shearing stress of the welding line of the welding piece is detected.

Description

Device and method for testing shear strength of welding seam of microwave device
Technical Field
The invention relates to the field of small-size part detection devices, in particular to a device and a method for testing the shear strength of a welding line of a microwave device.
Background
The quality of the welding seam directly influences the safety and the service life of the microwave device product, and the welding shear strength of the welding seam is detected by carrying out a shearing test on the welding seam of a welding workpiece of the microwave device.
Because metal materials such as microwave devices in the microwave devices are softer, and the size of a weldment is small, a shearing experiment cannot be directly carried out on welding seams of the welding pieces of the microwave devices, and the welding pieces of the microwave devices are fixed by a tool, so that accurate shearing of the welding seam positions is realized.
In addition, when calculating the shear strength, it is necessary to measure and calculate the area of the fracture surface of the part. Because the part size is small, the measuring tool such as a caliper is inconvenient to take, place and position when being used for measuring, the shearing strength testing process is complex, and the efficiency is low. Particularly, when the welding workpieces are different in size and shape, the welding seams cannot be accurately sheared.
Disclosure of Invention
The invention aims to solve the technical problem of improving the shear strength test efficiency.
The technical scheme for solving the technical problems is as follows: a welding seam shear strength testing device of a microwave device comprises a base, a first adjusting and measuring piece, a lower pressing block and a second adjusting and measuring piece;
the base is provided with a test piece installation cavity, the lower side and the front side in the test piece installation cavity are respectively provided with a first positioning surface and a second positioning surface, the upper side of the test piece installation cavity is provided with a first adjusting and measuring piece installation hole and a lower pressing block track hole which are arranged side by side left and right, the left end or the right end of the first positioning surface is a shearing end, the lower pressing block track hole is correspondingly positioned on the left side or the right side of the shearing end, the first adjusting and measuring piece installation hole is positioned on the other side of the shearing end relative to the lower pressing block track hole, the rear side of the test piece installation cavity is provided with a second adjusting and measuring piece installation hole,
the first regulation measuring part is installed in the first regulation measuring part mounting hole and is used for pressing the measuring part from the upper side, the lower pressing block is arranged in the lower pressing block track hole in a sliding mode, the second regulation measuring part is installed in the second regulation measuring part mounting hole and is used for pressing the measuring part from the rear side, and the side walls of the first regulation measuring part and the second regulation measuring part are provided with measuring scales.
The beneficial effects of the invention are as follows: the height value and the width value of the test piece are measured through the first adjusting measuring piece and the second adjusting measuring piece, so that the shearing area of the test piece with a rectangular or parallelogram cross section can be obtained easily, and the shearing stress of the welding seam of the workpiece can be obtained quickly under the condition that the pressing force is known. The first adjusting measuring piece and the second adjusting measuring piece are used for positioning the testing piece, so that the detection is more convenient and quick, and the testing difficulty caused by different sizes and shapes of the testing piece is solved. The sectional area detection and the shearing test can be realized by clamping the test piece once, the operation steps are reduced, and the detection efficiency is improved.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the front side of the test piece installation cavity is provided with a test piece taking and placing opening, a limiting block is arranged in the test piece taking and placing opening, and the limiting block is provided with the second positioning surface.
The beneficial effects of adopting the further scheme are as follows: the test piece is convenient and quick to take and place.
Further, the test piece mounting cavity is provided with a first adjusting and measuring piece, and the first adjusting and measuring piece is provided with a first adjusting and measuring piece.
The beneficial effects of adopting the further scheme are as follows: increase the area of contact of first regulation measuring part and test piece, guarantee that the small-size test piece can be by firm compaction.
Further, the testing device further comprises a first clamping piece and a second clamping piece, wherein the left side and the right side in the testing piece installation cavity are respectively provided with a second clamping piece installation hole and a first clamping piece installation hole, and the first clamping piece and the second clamping piece are respectively installed in the first clamping piece installation hole and the second clamping piece installation hole and are used for pressing the testing piece from the left side and the right side.
The beneficial effects of adopting the further scheme are as follows: after the welding line position of the test piece is placed, the test piece is clamped by adopting the first clamping piece and the second clamping piece, so that the test piece is prevented from moving left and right.
Further, the first adjusting and measuring piece comprises a first threaded section, a first scale section and a first operation section which are sequentially connected from bottom to top, and the first threaded section is in threaded connection with the first adjusting and measuring piece mounting hole.
The beneficial effects of adopting the further scheme are as follows: the first operating section is rotated, the first threaded section is in threaded connection with the first adjusting and measuring piece mounting hole and is in transmission, so that the first adjusting and measuring piece moves along the axis of the first adjusting and measuring piece mounting hole, and the end part of the first threaded section presses or loosens the measuring piece. The height c of the test piece can be obtained according to the scale of the first scale section.
Further, the second adjusting and measuring part comprises a second threaded section, a second scale section and a second operating section which are sequentially connected from front to back, and the second threaded section is in threaded connection with the second adjusting and measuring part mounting hole.
The beneficial effects of adopting the further scheme are as follows: and the second operating section is rotated, the second threaded section is in threaded connection with the second adjusting and measuring part mounting hole and is in transmission, so that the second adjusting and measuring part moves along the axis of the second adjusting and measuring part mounting hole, and the end part of the second threaded section presses or releases the measuring part. According to the graduations of the second graduation segment, the width b of the test piece can be obtained.
The invention also provides a weld joint shear strength testing method, which is realized by adopting the microwave device weld joint shear strength testing device and comprises the following steps:
step 1: placing a test piece into the test piece mounting cavity;
step 2: the first adjusting measuring piece and the second adjusting measuring piece are respectively pressed against the test piece from the upper side and the rear side, and the height c and the width b of the test piece are respectively read according to the measuring scales;
step 3: the lower pressing block is pressed down under the action of the pressure device until the welding seam of the test piece is broken, and the lower pressure F of the pressure device in breaking is recorded.
The test piece is positioned fast, and the detection is more convenient and quick, and the test difficulty brought by different sizes and shapes of the test piece is solved. The sectional area detection and the shearing test can be realized by clamping the test piece once, the operation steps are reduced, and the detection efficiency is improved.
Further, the step 2 further includes: and adjusting the welding seam of the test piece to be between the first adjusting and measuring piece and the lower pressing block.
The beneficial effects of adopting the further scheme are as follows: when the size and the shape of the test piece are different, the position of the welding line can be adjusted, and the welding line can be accurately sheared.
Further, the step 2 further includes: and pressing the test piece from the left side and the right side of the test piece.
The beneficial effects of adopting the further scheme are as follows: and positioning the test piece to avoid the left and right movement of the test piece.
Further, the step 3 further includes a step 4: calculating the shear stress sigma of the welding line:
drawings
FIG. 1 is a front view of a base of a microwave device weld shear strength testing apparatus of the present invention;
FIG. 2 is a left side cross-sectional view of a second adjustment gauge mounting hole of the present invention;
FIG. 3 is a block diagram of a first adjustment measurement member of the present invention;
FIG. 4 is a block diagram of a device for testing the shear strength of a weld joint of a microwave device according to the present invention;
fig. 5 is a left side cross-sectional view of the microwave device weld shear strength testing apparatus of the present invention at a second adjustment measurement.
In the drawings, the list of components represented by the various numbers is as follows:
10. a base; 101. a test piece mounting cavity; 102. a first adjustment measurement mounting hole; 103. pressing the block track hole down; 104. a first positioning surface; 105. a second clamp mounting hole; 106. a first clamp mounting hole; 107. a second adjustment measurement mounting hole;
11. a compaction block; 12. a first adjustment measurement; 121. a first thread segment; 122. a first scale segment; 123. a first operating section; 13. pressing the block; 14. a first clamping member; 15. a second clamping member; 16. a second adjustment measurement; 17. a limiting block;
20. and (3) a test piece.
Detailed Description
The principles and features of the present invention are described below with examples given for the purpose of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1 to 5, the embodiment provides a device for testing the shear strength of a welding seam of a microwave device, which comprises a base 10, a first adjusting and measuring piece 12, a lower pressing block 13 and a second adjusting and measuring piece 16;
the base 10 has a test piece mounting cavity 101, a first positioning surface 104 and a second positioning surface are respectively disposed on the lower side and the front side in the test piece mounting cavity 101, a first adjustment measurement piece mounting hole 102 and a lower press block track hole 103 are disposed side by side on the upper side of the test piece mounting cavity 101, the left end or the right end of the first positioning surface 104 is a shearing end, the lower press block track hole 103 is correspondingly disposed on the left side or the right side of the shearing end, the first adjustment measurement piece mounting hole 102 is disposed on the other side of the shearing end relative to the lower press block track hole 103, a second adjustment measurement piece mounting hole 107 is disposed on the rear side of the test piece mounting cavity 101,
the first adjusting and measuring part 12 is installed in the first adjusting and measuring part installation hole 102 and used for pressing the measuring part 20 from the upper side, the lower pressing block 13 is slidably arranged in the lower pressing block track hole 103, the second adjusting and measuring part 16 is installed in the second adjusting and measuring part installation hole 107 and used for pressing the measuring part 20 from the rear side, and the side walls of the first adjusting and measuring part 12 and the second adjusting and measuring part 16 are provided with measuring scales.
When in use, the test piece 20 is placed in the test piece mounting cavity 101, the placing position of the test piece 20 is adjusted, preferably, the welding seam is aligned with the shearing end, the positions of the first adjusting measuring piece 12 and the second adjusting measuring piece 16 are adjusted, the end parts of the first adjusting measuring piece 12 and the second adjusting measuring piece 16 are abutted with the side wall of the test piece 20, and the bottom surface and the front surface of the test piece 20 are respectively abutted with the first positioning surface 104 and the second positioning surface. On the one hand, the positioning function of the test piece 20 is achieved, and on the other hand, the height c and the width b of the test piece 20 can be obtained through the measuring scales of the side walls of the first adjusting and measuring piece 12 and the second adjusting and measuring piece 16 respectively. Optionally, the second adjustment measuring member 16 may be released after measurement, although it may not be released. The pressing block 13 is then pressed down by the pressing means until the test piece 20 breaks. The shearing stress of the test piece 20 can be calculated by taking the pressing force F at the time of fracture by the pressing means in combination with the height c and the width b.
The height and width values of the test piece 20 are measured by the first and second adjustment measuring pieces 12 and 16, so that the shearing area of the test piece 20 with a rectangular or parallelogram cross section can be easily obtained, and the shearing stress of the welding seam of the workpiece can be quickly obtained under the condition of known pressing force. The first adjusting measuring piece 12 and the second adjusting measuring piece 16 position the testing piece 20, so that the detection is more convenient and quick, and the testing difficulty caused by different sizes and shapes of the testing pieces is solved. The test piece 20 is clamped once, so that the sectional area detection and the shearing test can be realized, the operation steps are reduced, and the detection efficiency is improved.
The shearing end is shown as the left end or the right end of the first positioning surface 104 is cut off, and a vertically downward step is formed, so that the test piece 20 breaks along the shearing end under the combined action of the shearing end and the lower pressing block 13 when sheared.
The lower pressing block track hole 103 is located at the left side or the right side of the first adjusting and measuring part mounting hole 102, and the position of the lower pressing block track hole corresponds to the left-right direction of the shearing end. Specifically, the shear end is shown in fig. 1 as being on the right side of the first locating surface 104, and the lower press block track hole 103 is located on the right side of the first adjustment gauge mounting hole 102. Alternatively, the shearing end is at the left end of the first positioning surface 104, and the lower pressing block track hole 103 is located at the left side of the first adjustment measuring member mounting hole 102.
The lower end of the first adjusting and measuring piece 12 extends into the testing piece mounting cavity 101 and is abutted with the top surface of the testing piece 20, so that compression is achieved. The first adjustment measuring piece 12 may be mounted and pressed in the following manner: the first adjustment measuring piece 12 is in threaded transmission connection with the first adjustment measuring piece mounting hole 102, and the first adjustment measuring piece 12 is rotated, so that the position of the first adjustment measuring piece along the axis of the first adjustment measuring piece mounting hole 102 is adjusted; alternatively, the first adjustment measuring member 12 may slide along the first adjustment measuring member mounting hole 102, and the first adjustment measuring member 12 is connected to the linear power mechanism and is driven by the linear power mechanism to reciprocate linearly along the first adjustment measuring member mounting hole 102, so as to compress or loosen the test piece 20. The linear power mechanism can be an air cylinder, a hydraulic cylinder, a linear motor or the like.
The front end of the second adjusting and measuring member 16, like the first adjusting and measuring member 12, extends into the test member mounting cavity 101 and abuts against the rear surface of the test member 20, so that compression is achieved. The second adjustment measuring piece 16 may be mounted and pressed in the following manner: the second adjusting and measuring piece 16 is in threaded transmission connection with the second adjusting and measuring piece mounting hole 107, and the second adjusting and measuring piece 16 is rotated, so that the position of the second adjusting and measuring piece along the axis of the second adjusting and measuring piece mounting hole 107 is adjusted; alternatively, the second adjustment measuring member 16 may slide along the second adjustment measuring member mounting hole 107, and the second adjustment measuring member 16 is connected to the linear power mechanism and is driven by the linear power mechanism to reciprocate linearly along the second adjustment measuring member mounting hole 107, so as to compress or loosen the test piece 20. The linear power mechanism can be an air cylinder, a hydraulic cylinder, a linear motor or the like.
Wherein the first adjustment measuring piece 12 and the second adjustment measuring piece 16 need to be calibrated to mark the measuring graduations on their side walls. Specifically:
first, the position of the first adjustment measuring piece 12 is adjusted, and when the end of the first adjustment measuring piece 12 abuts against the inner wall of the test piece mounting cavity 101, a scale 0 is marked at the boundary line between the side wall of the first adjustment measuring piece 12 and the top wall of the base 10. Similarly, when the position of the second adjusting and measuring member 16 is adjusted and the end of the second adjusting and measuring member 16 abuts against the second positioning surface, the boundary line between the side wall of the second adjusting and measuring member 16 and the rear wall of the base 10 is marked with a scale 0.
Next, referring to fig. 4 and 5, a standard block is placed in the test piece mounting chamber 101, the position of the first adjustment measuring piece 12 is adjusted, and when the end of the first adjustment measuring piece 12 abuts against the top surface of the standard block and the bottom surface of the standard block abuts against the first positioning surface 104, the standard block height (the distance between the bottom surface and the top surface) is known to be c 0 Marked as scale c at the boundary line between the side wall of the first adjustment measuring piece 12 and the top wall of the base 10 0 0 and c on the side wall of the first adjustment measuring part 12 0 The scale marks are measured and marked by a standard measuring ruler.
Similarly, when the position of the second adjustment measuring member 16 is adjusted, the end of the second adjustment measuring member 16 abuts against the rear face of the standard block, and the front face of the standard block abuts against the second positioning face, the width (the distance between the front face and the rear face) of the standard block is known as b 0 Marked as scale b at the boundary line between the side wall of the second adjustment measuring part 16 and the rear wall of the base 10 0 0 and b on the side wall of the second adjustment measuring part 16 0 The scale marks are measured and marked by a standard measuring ruler.
On the basis of the above scheme, as shown in fig. 5, the front side of the test piece installation cavity 101 is provided with a test piece taking and placing port, a limiting block 17 is arranged in the test piece taking and placing port, and the limiting block 17 is provided with the second positioning surface.
The test piece taking and placing port is used for placing or taking out the test piece 20 into or from the test piece mounting cavity 101, and the test piece 20 is convenient and quick to take and place.
On the basis of the scheme, the device further comprises a compression block 11, wherein the compression block 11 is positioned in the test piece mounting cavity 101 and is connected with the first adjustment measuring piece 12.
The contact area of the first adjusting measuring piece 12 and the test piece 20 is increased by the compressing block 11, so that the test piece 20 with small size can be firmly compressed.
The compression block 11 has at least the following two mounting modes: the first installation mode is as follows: the compression block 11 is fixedly connected with the lower end of the first adjusting and measuring piece 12; and the second installation mode is as follows: the first adjustment measuring member 12 has an annular protrusion, the pressing block 11 has an annular groove, or the first adjustment measuring member 12 has an annular groove, the pressing block 11 has an annular protrusion, the lower end of the first adjustment measuring member 12 is sleeved with the pressing block 11, and the annular protrusion is caught in the annular groove, the pressing block 11 can coaxially rotate with respect to the first adjustment measuring member 12, so that when the first adjustment measuring member 12 is screwed with the base 10, the first adjustment measuring member 12 is rotated, and the pressing block 11 can only move up and down without rotating with respect to the test member 20. The limit on the test piece 20 is more accurate.
On the basis of the scheme, the test piece mounting cavity 101 further comprises a first clamping piece 14 and a second clamping piece 15, wherein the left side and the right side in the test piece mounting cavity 101 are respectively provided with a second clamping piece mounting hole 105 and a first clamping piece mounting hole 106, and the first clamping piece 14 and the second clamping piece 15 are respectively arranged in the first clamping piece mounting hole 106 and the second clamping piece mounting hole 105 and are used for pressing the test piece 20 from the left side and the right side.
After the weld joint positions of the test pieces 20 are placed, the test pieces 20 are clamped by the first clamping piece 14 and the second clamping piece 15, so that the test pieces 20 are prevented from moving left and right.
The first clamping member 14 may be mounted and pressed in the following manner: the first clamping member 14 is in threaded driving connection with the first clamping member mounting hole 106, and the first clamping member 14 is rotated so as to adjust the position of the first clamping member along the axis of the first clamping member mounting hole 106; alternatively, the first clamping member 14 may slide along the first clamping member mounting hole 106, and the first clamping member 14 is connected to the clamping member linear power mechanism and is driven by the clamping member linear power mechanism to reciprocate linearly along the first clamping member mounting hole 106, so as to compress or loosen the test piece 20. The clamping piece linear power mechanism can be an air cylinder, a hydraulic cylinder or a linear motor and the like.
Similarly, the second clamping member 15 may be mounted and compressed in the following manner: the second clamping piece 15 is in threaded transmission connection with the second clamping piece mounting hole 105, and the second clamping piece 15 is rotated, so that the position of the second clamping piece along the axis of the second clamping piece mounting hole 105 is adjusted; alternatively, the second clamping member 15 may slide along the second clamping member mounting hole 105, and the second clamping member 15 is connected to the clamping member linear power mechanism and linearly reciprocates along the second clamping member mounting hole 105 under the driving of the clamping member linear power mechanism, thereby compressing or releasing the test piece 20. The clamping piece linear power mechanism can be an air cylinder, a hydraulic cylinder or a linear motor and the like.
On the basis of the above scheme, the first adjusting and measuring part 12 comprises a first threaded section 121, a first scale section 122 and a first operating section 123 which are sequentially connected from bottom to top, and the first threaded section 121 is in threaded connection with the first adjusting and measuring part mounting hole 102.
The first operating section 123 is rotated, and the first threaded section 121 is screwed and driven with the first adjustment measuring member mounting hole 102, so that the first adjustment measuring member 12 moves along its axis within the first adjustment measuring member mounting hole 102, and the end of the first threaded section 121 presses or releases the test piece 20. The first scale 122 has the measuring scale, and the height c of the test piece 20 can be obtained from the scale of the first scale 122.
On the basis of the above scheme, the second adjusting and measuring part 16 comprises a second threaded section, a second scale section and a second operating section which are sequentially connected from front to back, and the second threaded section is in threaded connection with the second adjusting and measuring part mounting hole 107.
The second operating section is rotated, and the second threaded section is screwed and driven with the second adjustment measuring member mounting hole 107, so that the second adjustment measuring member 16 moves along its axis within the second adjustment measuring member mounting hole 107, and the end of the second threaded section presses or releases the test piece 20. The second operating section has a measuring scale, and the width b of the test piece 20 can be obtained from the scale of the second scale section.
When the device for testing the shear strength of the welding seam of the microwave device in this embodiment is used, the test piece 20 is placed in the test piece mounting cavity 101, the placement position of the test piece 20 is adjusted, and preferably, the welding seam is aligned with the shear end. The positions of the first adjustment measuring piece 12 and the second adjustment measuring piece 16 are adjusted so that the end parts of the first adjustment measuring piece 12 and the second adjustment measuring piece are abutted with the side wall of the test piece 20, and the bottom surface and the front surface of the test piece 20 are abutted with the first positioning surface 104 and the second positioning surface respectively. On the one hand, the positioning function of the test piece 20 is achieved, and on the other hand, the height c and the width b of the test piece 20 can be obtained through the measuring scales of the side walls of the first adjusting and measuring piece 12 and the second adjusting and measuring piece 16 respectively. The second adjustment measuring piece 16 can be released after the measurement. The first clamping member 14 and the second clamping member 15 are adjusted to clamp the left and right sides of the test piece 20. The pressing block 13 is then pressed down by the pressing means until the test piece 20 breaks. The shearing stress of the test piece 20 can be calculated by taking the pressing force F at the time of fracture by the pressing means in combination with the height c and the width b.
The embodiment also provides a weld shear strength testing method, which is realized by adopting the microwave device weld shear strength testing device and comprises the following steps:
step 1: placing the test piece 20 into the test piece mounting cavity 101;
step 2: pressing the first and second adjustment measuring pieces 12 and 16 against the test piece 20 from the upper and rear sides, respectively, and reading the height c and width b of the test piece 20 according to the measurement scales, respectively;
specifically, the first adjustment measuring member 12 presses the top surface of the test piece 20, the bottom surface of the test piece 20 abuts against the first positioning surface 104, the second adjustment measuring member 16 presses the rear surface of the test piece 20, and the front surface of the test piece 20 abuts against the second positioning surface.
Step 3: the lower pressing block 13 is pressed down under the action of the pressure device until the welding seam of the test piece 20 is broken, and the lower pressure F of the pressure device in the breaking process is recorded.
The test piece 20 is positioned fast, detects more convenient and fast, has solved the test difficulty that the different and bringing of test piece size shape. The test piece 20 is clamped once, so that the sectional area detection and the shearing test can be realized, the operation steps are reduced, and the detection efficiency is improved.
On the basis of the above scheme, the step 2 further includes: the weld of the test piece 20 is adjusted between the first adjustment measuring piece 12 and the lower press 13.
When the size and shape of the test piece 20 are different, the welding seam position can be adjusted, and the welding seam can be accurately sheared.
The step 2 specifically may be:
step 2a: pressing the first and second adjustment measuring pieces 12 and 16 against the test piece 20 from the upper and rear sides, respectively, and reading the height c and width b of the test piece 20 according to the measurement scales, respectively; then, the first adjustment measuring member 12 is loosened, the welding seam of the test member 20 is adjusted between the first adjustment measuring member 12 and the lower pressing block 13, and the first adjustment measuring member 12 is tightened again.
Alternatively, step 2b: adjusting the weld of the test piece 20 to a position between the first adjustment measuring piece 12 and the lower pressing block 13; then, the first adjustment measuring piece 12 and the second adjustment measuring piece 16 are pressed against the test piece 20 from the upper side and the rear side, respectively, and the height c and the width b of the test piece 20 are read, respectively, according to the measurement scale.
On the basis of the above scheme, the step 2 further includes: the test piece 20 is pressed from both left and right sides of the test piece 20. The test piece 20 is positioned so as to avoid its lateral movement.
The step 2 specifically may be:
step 2c: pressing the first and second adjustment measuring pieces 12 and 16 against the test piece 20 from the upper and rear sides, respectively, and reading the height c and width b of the test piece 20 according to the measurement scales, respectively; then, the first adjustment measuring member 12 is loosened, the welding seam of the test member 20 is adjusted between the first adjustment measuring member 12 and the lower pressing block 13, and the first adjustment measuring member 12 is tightened again. Subsequently, the test piece 2 is pressed from the left and right sides of the test piece 20.
Alternatively, step 2d: adjusting the weld of the test piece 20 to a position between the first adjustment measuring piece 12 and the lower pressing block 13; compressing the test piece 20 from both left and right sides of the test piece 20; then, the first adjustment measuring piece 12 and the second adjustment measuring piece 16 are pressed against the test piece 20 from the upper side and the rear side, respectively, and the height c and the width b of the test piece 20 are read, respectively, according to the measurement scale.
Alternatively, step 2e: adjusting the weld of the test piece 20 to a position between the first adjustment measuring piece 12 and the lower pressing block 13; then, the first and second adjustment measuring pieces 12 and 16 are pressed against the test piece 20 from the upper and rear sides, respectively, and the height c and width b of the test piece 20 are read according to the measurement scales, respectively; the test piece 20 is pressed from both left and right sides of the test piece 20.
On the basis of the scheme, the step 3 further comprises a step 4: calculating the shear stress sigma of the welding line:
in the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims (10)

1. The device for testing the shear strength of the welding seam of the microwave device is characterized by comprising a base (10), a first adjusting and measuring piece (12), a lower pressing block (13) and a second adjusting and measuring piece (16);
the base (10) is provided with a test piece installation cavity (101), a first positioning surface (104) and a second positioning surface are respectively arranged on the lower side and the front side in the test piece installation cavity (101), a first adjusting and measuring piece installation hole (102) and a lower pressing piece track hole (103) which are arranged side by side left and right are arranged on the upper side of the test piece installation cavity (101), the left end or the right end of the first positioning surface (104) is a shearing end, the lower pressing piece track hole (103) is correspondingly positioned on the left side or the right side of the shearing end, the first adjusting and measuring piece installation hole (102) is positioned on the other side of the shearing end relative to the lower pressing piece track hole (103), a second adjusting and measuring piece installation hole (107) is arranged on the rear side of the test piece installation cavity (101),
the first regulation measuring piece (12) install in first regulation measuring piece mounting hole (102) and be used for follow upside compression test piece (20), lower briquetting (13) slide set up in lower briquetting track hole (103), second regulation measuring piece (16) install in second regulation measuring piece mounting hole (107) and be used for follow rear compression test piece (20), first regulation measuring piece (12) with the lateral wall of second regulation measuring piece (16) all has the measurement scale, first regulation measuring piece (12) with second regulation measuring piece (16) are used for follow upside and rear side compression test piece (20) respectively to read respectively according to the measurement scale high c and the width b of test piece (20).
2. The device for testing the shear strength of the welding seam of the microwave device according to claim 1, wherein a test piece taking and placing port is formed in the front side of the test piece mounting cavity (101), a limiting block (17) is arranged in the test piece taking and placing port, and the limiting block (17) is provided with the second positioning surface.
3. The device according to claim 1, further comprising a compression block (11), wherein the compression block (11) is located in the test piece mounting cavity (101) and is connected to the first adjustment measuring piece (12).
4. The device for testing the shear strength of a welding seam of a microwave device according to claim 1, further comprising a first clamping piece (14) and a second clamping piece (15), wherein a second clamping piece mounting hole (105) and a first clamping piece mounting hole (106) are respectively formed in the left side and the right side in the mounting cavity (101), and the first clamping piece (14) and the second clamping piece (15) are respectively mounted in the first clamping piece mounting hole (106) and the second clamping piece mounting hole (105) and are used for pressing a test piece (20) from the left side and the right side.
5. A device according to any one of claims 1-4, wherein the first adjustment measuring element (12) comprises a first threaded section (121), a first scale section (122) and a first operating section (123) connected in sequence from bottom to top, the first threaded section (121) being in threaded connection with the first adjustment measuring element mounting hole (102).
6. A device according to any one of claims 1-4, wherein the second adjustment measuring element (16) comprises a second threaded section, a second scale section and a second operating section connected in sequence from front to back, the second threaded section being threadedly connected with the second adjustment measuring element mounting hole (107).
7. A method for testing the shear strength of a weld joint, which is characterized by being realized by the microwave device weld joint shear strength testing device according to any one of claims 1-6, and comprising the following steps:
step 1: placing a test piece (20) into the test piece mounting cavity (101);
step 2: pressing the first and second adjustment measuring members (12, 16) against the test member (20) from the upper and rear sides, respectively, and reading the height c and width b of the test member (20) according to the measurement scales, respectively;
step 3: the pressing block (13) is pressed down under the action of the pressure device until the welding seam of the test piece (20) is broken, and the pressing force F of the pressure device in breaking is recorded.
8. The method of claim 7, wherein step 2 further comprises: the welding seam of the test piece (20) is adjusted between the first adjusting and measuring piece (12) and the lower pressing piece (13).
9. The method of claim 8, wherein step 2 further comprises: the test piece (20) is pressed from the left side and the right side of the test piece (20).
10. The method for testing shear strength of a weld according to claim 7, further comprising step 4: calculating shear stress of weld：
。
CN202111299287.9A 2021-11-04 2021-11-04 Device and method for testing shear strength of welding seam of microwave device Active CN114002088B (en)

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Citations (6)

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Publication number Priority date Publication date Assignee Title
CN103196755A (en) * 2013-03-28 2013-07-10 清华大学 Method for measuring combination strength of investment casting shells
CN108844811A (en) * 2018-06-19 2018-11-20 哈尔滨工业大学（威海） A kind of fixture and test method of measurement sandwich type connection test specimen cutting performance
CN209992322U (en) * 2019-04-24 2020-01-24 武汉中科岩土工程有限责任公司 Rock shear force test device
CN112730045A (en) * 2020-12-21 2021-04-30 中南大学 Shearing clamp and application method thereof
CN214427186U (en) * 2021-03-22 2021-10-19 深圳市蔚来芯科技有限公司 Chip bonding interface shear strength test equipment
CN214538923U (en) * 2021-01-20 2021-10-29 铁科腾跃科技有限公司 Composite sleeper shear strength detection device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103196755A (en) * 2013-03-28 2013-07-10 清华大学 Method for measuring combination strength of investment casting shells
CN108844811A (en) * 2018-06-19 2018-11-20 哈尔滨工业大学（威海） A kind of fixture and test method of measurement sandwich type connection test specimen cutting performance
CN209992322U (en) * 2019-04-24 2020-01-24 武汉中科岩土工程有限责任公司 Rock shear force test device
CN112730045A (en) * 2020-12-21 2021-04-30 中南大学 Shearing clamp and application method thereof
CN214538923U (en) * 2021-01-20 2021-10-29 铁科腾跃科技有限公司 Composite sleeper shear strength detection device
CN214427186U (en) * 2021-03-22 2021-10-19 深圳市蔚来芯科技有限公司 Chip bonding interface shear strength test equipment

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