CN115451779A - Tool for inspecting concave-convex amount of special rivet - Google Patents
Tool for inspecting concave-convex amount of special rivet Download PDFInfo
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- CN115451779A CN115451779A CN202211243446.8A CN202211243446A CN115451779A CN 115451779 A CN115451779 A CN 115451779A CN 202211243446 A CN202211243446 A CN 202211243446A CN 115451779 A CN115451779 A CN 115451779A
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- 239000011521 glass Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 8
- 239000000523 sample Substances 0.000 claims description 7
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 238000005259 measurement Methods 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 238000007689 inspection Methods 0.000 abstract description 24
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 229910001315 Tool steel Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- 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
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- 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
- G01B5/18—Measuring arrangements characterised by the use of mechanical techniques for measuring depth
Abstract
The invention provides a tool for inspecting the concave-convex amount of a special rivet, and belongs to the technical field of aviation product inspection. The tool provided by the invention comprises a ruler body, a height ruler, a depth ruler and a digital display component which is respectively fixed on the height ruler and the depth ruler, wherein the depth ruler is inserted into a T-shaped groove of the height ruler, and then the height ruler provided with the depth ruler is arranged in a through groove of the ruler body, thus completing the assembly of the three rulers. The riveting tool is simple in structure, convenient in digital display operation and convenient to carry, fills the blank of the riveting concave-convex quantity inspection tool, improves the accuracy of the inspection result, can quickly realize quantitative inspection on the riveting quality and improves the working efficiency.
Description
Technical Field
The invention belongs to the technical field of aviation product inspection, and relates to a tool for inspecting the concave-convex amount of a special rivet, which is an inspection tool in the process of inspecting and accepting aviation products and is used for quickly realizing qualitative and quantitative inspection of the concave-convex amount of the special rivet.
Background
The outer surface skin of the aircraft air inlet channel is subjected to single-side compression by special rivets such as high-shear rivets, threaded hollow rivets, self-plugging rivets and the like, the compression force of the rivets and the pneumatic appearance of the air inlet channel are directly influenced by the quality of riveting, and the concave-convex amount of the rivet after riveting relative to the outer edge of the skin is an important index for detecting the quality of riveting; at the present stage, the inspection technicians can only use the feeler gauge to assist in inspection when inspecting the concave-convex quantity, no professional tool is provided, the error is large, and the inspection requirements are difficult to meet.
Disclosure of Invention
In order to solve the problems, the invention provides a tool for inspecting the concave-convex amount of the special rivet, which is convenient for inspection technicians to qualitatively inspect the concave-convex amount of the special rivet and also considers quantitative inspection of the concave-convex amount, and is used for improving the working efficiency of the inspection technicians and the accuracy of inspection results.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a tool for checking the concave-convex amount of a special rivet comprises a digital display frame 1, a digital display movable grid 2, a starting button 3, a reset button 4, a recording button 5, a battery 6, a single chip microcomputer module 7, a ruler body 8, a height ruler 9, a height ruler limiting head 10, a depth ruler 11, a depth ruler probe 12, a tightening screw 13, a digital display frame fixing screw 14, a digital display screen 15, a pressing sheet 16 and a glass fixed grid 17.
The ruler body 8 is a basic supporting structure of a tool and is of a long strip-shaped plate-shaped structure, a through groove is formed in the back of the ruler body along the length direction and used for mounting the height ruler 9, the height ruler 9 and the height ruler are in clearance fit, the length of the ruler body 8 is the same as that of the height ruler 9, the height ruler 9 can freely slide in the ruler body during working, grooves with different widths are formed in the two ends of the ruler body 8 along the central line, the narrow grooves are used for limiting the movement of the depth ruler 11, and the wide grooves are a measuring working area of the height ruler 9; the upper surface and the lower surface of one end, provided with a narrow groove, of the ruler body 8 are respectively provided with a glass fixed grid 17 which is arranged along the length direction, the size conversion is carried out by utilizing the relative displacement generated by the glass fixed grid 17 and the digital display moving grid 2, and the fixed grid is made of glass materials, so that the high precision can be kept; the bottom edge of the through groove at the end, provided with the narrow groove, of the ruler body 8 is provided with a pressing piece 16, the side wall of the through groove beside the ruler body is provided with a through hole, and the tail end of a screwing screw 13 penetrates through the through hole and is matched with the pressing piece 16 to be used for pressing the height ruler 9 at the working position, so that the height ruler can not move, and accurate positioning is realized.
The height gauge 9 is used for measuring the height of the rivet head and the rivet heading head, is of a strip-shaped plate structure, the profile of the height gauge is matched with the through groove of the gauge body 8, a T-shaped groove is formed in the middle of the contact surface of the height gauge 9 and the gauge body 8 along the length direction and used for mounting the depth gauge 11, the height gauge and the depth gauge are in clearance fit, and the depth gauge 11 can freely slide in the height gauge 9; the height gauge limiting head 10 is fixed at one end of the height gauge 9 through a tightening screw, the width and the thickness of the height gauge limiting head are larger than those of the height gauge 9, the height gauge 9 is placed in the through groove of the gauge body 8, and the height gauge limiting head 10 abuts against the end face, provided with the narrow groove, of the end face of the gauge body 8 and used for preventing the height gauge 9 from moving downwards.
The depth gauge 11 is used for measuring the depths of a rivet head and a core, and is of a strip-shaped plate structure, a stepped bulge is arranged in the middle of the depth gauge along the length direction, the stepped bulge of the upper half part is higher than the stepped bulge of the lower half part, and the stepped bulge of the upper half part is arranged in a narrow groove of the gauge body 8 and used for limiting the movement of the depth gauge 11; the tail of the depth gauge 11 is connected with a depth gauge probe 12 through threaded connection and used for measuring the depth with a small diameter. The depth gauge 11 is inserted into the T-shaped groove of the height gauge 9, and then the height gauge 9 with the depth gauge 11 is placed in the through groove of the gauge body 8, so that the assembly of the three gauges is completed.
The digital display frame 1, the digital display moving grid 2, the starting button 3, the reset button 4, the recording button 5, the battery 6, the single chip microcomputer module 7 and the digital display screen 15 form digital display parts, and the digital display parts are two groups with the same structure, namely a height digital display part and a depth digital display part, and are respectively used for realizing digital display of height and depth; the digital display frames 1 are used as a supporting structure of a digital display part and are of a plate-shaped structure, the two digital display frames 1 are respectively positioned on the front surface and the back surface of one end, provided with a narrow groove, of the ruler body 8, one digital display frame 1 is fixedly connected with the height ruler 9 through a digital display frame fixing screw 14, the other digital display frame 1 is fixedly connected to the stepped bulge on the upper half part of the depth ruler 11 through a digital display frame fixing screw 14, so that the two digital display frames 1 can respectively slide along with the height ruler 9 and the depth ruler 11, the two digital display frames 1 are mutually independent, a certain gap is reserved between the two digital display frames, and the tightening screw 13 is positioned in the gap between the two digital display frames 1 and is not mutually interfered with the two digital display frames; all be fixed with digital display movable gate 2 through tightening the screw on every digital display frame 1, start button 3, reset button 4, record button 5, battery 6, single chip module 7 and digital display screen 15, wherein, the position of two digital display movable gates 2 and two glass fixed gates 17 one-to-one, start button 3 is used for the switch on and shut down, reset button 4 is used for the zero setting, record button 5 is used for taking notes measuring process numerical value, avoid leading to the numerical value inaccurate because of the operating problem, along with the change of digital display movable gate 2 for glass fixed gate 17 position, single chip module 7 feeds back the numerical value of size and shows on digital display screen 15, battery 6 is used for supplying power for high digital display part and degree of depth digital display part.
Further, the ruler body 8 is made of high-strength tool steel.
Furthermore, the digital display frame 1 is of an alloy steel structure and is high in strength.
The use method of the tool comprises the following steps:
the method comprises the following steps: when the protrusion amount of the special rivet is checked, only the height gauge 9 moves, the machine is started by pressing the start button 3 on the height digital display component, and the zero setting is carried out by pressing the corresponding reset button 4; moving the height gauge 9 until the digital display value of the digital display screen 15 reaches the qualified height of the special rivet to be detected, and tightly pressing the height gauge 9 through a tightening screw 13; the end face of one end of the ruler body 8, which is provided with the wide groove, is vertically pressed on the skin, and a gap formed between the height ruler 9 in the wide groove and the skin is the qualified height of the special rivet to be detected; moving the whole tool along the surface of the skin towards the special rivet to be detected, ensuring that a gap between the height gauge 9 and the skin is aligned with the special rivet to be detected, and the gauge body 8 is always vertical to the skin, wherein the special rivet to be detected is qualified if the protrusion amount of the special rivet to be detected can pass through the gap; under the qualified condition, the end of the height gauge 9 can be attached to the top end of the special rivet to be detected, and then the compression screw 13 is screwed down for reading, so that the quantitative inspection of the protrusion amount of the special rivet to be detected is realized.
Step two: when the sinking amount of the special rivet is checked, only the depth gauge 11 moves, the height gauge 11 is vertically attached to the top end of the special rivet to be detected, the special rivet is started by pressing the starting button 3 on the depth digital display component, and the special rivet is zeroed by pressing the reset button 4, so that the tightening screw 13 is ensured to tightly press the height gauge 9, and the movement of the height gauge 9 is avoided; and adjusting the depth gauge 12 to enable the tail end of the depth gauge to be in contact with the bottom of the special rivet core to be detected, reading a depth digital display numerical value, and realizing quantitative inspection of the sinking amount of the special rivet to be detected.
The invention has the beneficial effects that:
the invention provides a special inspection tool for riveting quality inspection, and can realize high-precision digital display quantitative inspection on the basis of realizing qualitative inspection. The riveting tool is simple in structure, convenient in digital display operation and convenient to carry, fills up the blank of the riveting concave-convex quantity inspection tool, improves the accuracy of the inspection result by using the digital display special tool, can quickly realize quantitative inspection on the riveting quality, and improves the working efficiency of inspection personnel.
Drawings
FIG. 1 is a front isometric view of a tool provided by the present invention.
FIG. 2 is a rear isometric view of a tool provided by the present invention.
Fig. 3 is a front view, a rear view and a left side view of the ruler body, wherein, (a) is a front view, (b) is a rear view and (c) is a left side view.
Fig. 4 is a front view, a top view, and a left side view of the depth gauge, wherein (a) is a front view, (b) is a top view, and (c) is a left side view.
Fig. 5 is a front view, a rear view and a left side view of the height gauge, wherein (a) is a front view, (b) is a rear view and (c) is a left side view.
In the figure: 1, digitally displaying a frame; 2, displaying a moving grid digitally; 3, starting up the button; 4 a reset button; 5 a record button; 6 batteries; 7, a singlechip module; 8, a ruler body; 9 height gauge; 10 height gauge limiting head; 11, a depth gauge; a 12-depth gauge probe; 13, screwing down the screw; 14, fixing screws of the digital display frame; 15 digital display screen; 16 a compression tab; 17 glass fixed grid.
Detailed Description
The present invention is further illustrated by the following specific examples.
Examples
A tool for inspecting the concave-convex amount of a special rivet comprises a digital display frame 1, a digital display movable grid 2, a starting button 3, a reset button 4, a recording button 5, a battery 6, a single chip microcomputer module 7, a ruler body 8, a height gauge 9, a height gauge limiting head 10, a depth gauge 11, a depth gauge probe 12, a tightening screw 13, a digital display frame fixing screw 14, a digital display screen 15, a pressing sheet 16 and a glass fixed grid 17, and is shown in fig. 1 and 2.
As shown in fig. 3, the blade 8 is a basic supporting structure of a tool, is made of high-strength tool steel, is in a strip-shaped plate-shaped structure, and has a through groove formed in the back surface thereof along the length direction for mounting the height gauge 9, the height gauge 9 and the height gauge are in clearance fit, the length of the blade 8 is the same as that of the height gauge 9, the height gauge 9 can freely slide in the blade during operation, grooves with different widths are formed in the two ends of the blade 8 along the center line, the narrow groove is used for limiting the movement of the depth gauge 11, and the wide groove is a measuring working area of the height gauge 9; the upper surface and the lower surface of one end, provided with a narrow groove, of the ruler body 8 are respectively provided with a glass fixed grid 17 which is arranged along the length direction, the size conversion is carried out by utilizing the relative displacement generated by the glass fixed grid 17 and the digital display moving grid 2, and the fixed grid is made of glass materials, so that the high precision can be kept; the bottom edge of the through groove at the end, provided with the narrow groove, of the ruler body 8 is provided with a pressing piece 16, the side wall of the through groove beside the ruler body is provided with a through hole, and the tail end of a screwing screw 13 penetrates through the through hole and is matched with the pressing piece 16 to be used for pressing the height ruler 9 at the working position, so that the height ruler can not move, and accurate positioning is realized.
As shown in fig. 5, the height gauge 9 is used for measuring the height of the rivet head and the rivet heading head, and has a strip-shaped plate structure, the profile of the strip-shaped plate structure is matched with the through groove of the gauge body 8, a T-shaped groove is arranged in the middle of the contact surface between the height gauge 9 and the gauge body 8 along the length direction and is used for installing the depth gauge 11, and the depth gauge 11 and the depth gauge are in clearance fit, and the depth gauge 11 can freely slide in the height gauge 9; the height gauge limiting head 10 is fixed at one end of the height gauge 9 through a screwing screw, the width and the thickness of the height gauge limiting head are larger than those of the height gauge 9, the height gauge 9 is arranged in the through groove of the gauge body 8, and the height gauge limiting head 10 abuts against the end face, at one end of the gauge body 8, of the narrow groove and is used for preventing the height gauge 9 from moving downwards.
As shown in fig. 4, the depth gauge 11 is used for measuring the depth of the rivet head and the core, and has a strip-shaped plate structure, wherein a stepped protrusion is arranged in the middle of the depth gauge along the length direction, the stepped protrusion in the upper half part is higher than the stepped protrusion in the lower half part, and the stepped protrusion in the upper half part is arranged in a narrow groove of the gauge body 8 and used for limiting the movement of the depth gauge 11; the tail of the depth gauge 11 is connected with a depth gauge probe 12 through threaded connection and used for measuring the depth with smaller diameter. The depth gauge 11 is inserted into the T-shaped groove of the height gauge 9, and then the height gauge 9 with the depth gauge 11 is placed in the through groove of the gauge body 8, so that the assembly of the three gauges is completed.
As shown in fig. 1 and fig. 2, the digital display frame 1, the digital display moving grid 2, the start button 3, the reset button 4, the recording button 5, the battery 6, the single chip microcomputer module 7 and the digital display screen 15 constitute digital display components, and the digital display components are two groups with the same structure, namely a height digital display component and a depth digital display component, which are respectively used for realizing digital display of height and depth; the digital display frames 1 are used as supporting structures of digital display parts, alloy steel structures are adopted, the digital display frames are of plate-shaped structures, the two digital display frames 1 are respectively positioned on the front surface and the back surface of one end, provided with a narrow groove, of the ruler body 8, one of the digital display frames 1 is fixedly connected with the height ruler 9 through the digital display frame fixing screws 14, the other digital display frame 1 is fixedly connected to the stepped bulge on the upper half part of the depth ruler 11 through the digital display frame fixing screws 14, the two digital display frames 1 can respectively slide along with the height ruler 9 and the depth ruler 11, the two digital display frames 1 are mutually independent, a certain gap is reserved between the two digital display frames, and the tightening screws 13 are positioned in a gap between the two digital display frames 1 and are mutually not interfered with the two digital display frames; all be fixed with digital display movable grid 2 through tightening the screw on every digital display frame 1, start button 3, reset button 4, record button 5, battery 6, single chip module 7 and digital display screen 15, wherein, the position of two digital display movable grids 2 and two glass fixed grids 17 one-to-one, start button 3 is used for the switch on and shut down, reset button 4 is used for zeroing, record button 5 is used for taking notes measuring process numerical value, avoid leading to the numerical value inaccurate because of the operating problem, along with the change of digital display movable grid 2 for glass fixed grid 17 position, single chip module 7 feeds back the numerical value of size and shows on digital display screen 15, battery 6 is used for supplying power for high digital display part and degree of depth digital display part.
The use method of the tool comprises the following steps:
the method comprises the following steps: when the protrusion amount of the special rivet is checked, only the height gauge 9 moves, the machine is started by pressing the start button 3 on the height digital display component, and the zero setting is carried out by pressing the corresponding reset button 4; for example, the protruding amount of the high shear resistant rivet is required to be +0.15mm, the height gauge 9 is moved until the digital display value of the digital display screen 15 reaches 0.15mm, and the height gauge 9 is tightly pressed by screwing the screw 13; the end face of the end, provided with the wide groove, of the ruler body 8 is vertically pressed on the skin, and a gap formed between the height ruler 9 in the wide groove and the skin is the qualified height of the special rivet to be detected; the whole tool is moved along the surface of the skin towards the special rivet to be detected, so that the gap between the height gauge 9 and the skin is aligned with the special rivet to be detected, the gauge body 8 is always perpendicular to the skin, and the special rivet to be detected is qualified if the protrusion amount of the special rivet to be detected can pass through the gap.
Step two: when the sinking amount of the special rivet is checked, only the depth gauge 11 moves, the height gauge 11 is vertically attached to the top end of the special rivet to be detected, the machine is started by pressing the starting button 3 on the depth digital display component, the reset button 4 is pressed for zero setting, and at the moment, the tightening screw 13 is required to be ensured to tightly press the height gauge 9, so that the movement of the height gauge 9 is avoided; and adjusting the depth gauge 12 to enable the tail end of the depth gauge to be in contact with the bottom of the special rivet core to be detected, reading a depth digital display numerical value, and measuring the sinking amount of the high shear rivet core to be-1.5 mm.
The above-mentioned embodiments only express the embodiments of the present invention, but not should be understood as the limitation of the scope of the invention patent, it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the concept of the present invention, and these all fall into the protection scope of the present invention.
Claims (4)
1. The tool for checking the concave-convex amount of the special rivet is characterized by comprising a digital display frame (1), a digital display movable grid (2), a starting button (3), a reset button (4), a recording button (5), a battery (6), a single chip microcomputer module (7), a ruler body (8), a height ruler (9), a height ruler limiting head (10), a depth ruler (11), a depth ruler probe (12), a tightening screw (13), a digital display screen (15), a pressing sheet (16) and a glass fixed grid (17);
the height gauge is characterized in that the gauge body (8) is a basic supporting structure of a tool and is of a long strip-shaped plate-shaped structure, a through groove is formed in the back of the gauge body along the length direction and used for mounting the height gauge (9), the height gauge and the height gauge are in clearance fit, the length of the gauge body (8) is the same as that of the height gauge (9), the height gauge (9) can freely slide in the gauge body during working, grooves with different widths are formed in the two ends of the gauge body (8) along the central line, the narrow grooves are used for limiting the movement of the depth gauge (11), and the wide grooves are the measuring working area of the height gauge (9); the upper surface and the lower surface of one end, provided with a narrow groove, of the ruler body (8) are respectively provided with a glass fixed grid (17) which is arranged along the length direction, and the size conversion is carried out by utilizing the relative displacement generated by the glass fixed grid (17) and the digital display moving grid (2); a pressing piece (16) is arranged at the edge of the bottom surface of the through groove at one end of the ruler body (8) provided with the narrow groove, a through hole is arranged on the side wall of the through groove beside the ruler body, and the tail end of a tightening screw (13) is matched with the pressing piece (16) after penetrating through the through hole and is used for pressing the height ruler (9) at the working position;
the height gauge (9) is used for measuring the height of the rivet head and the rivet heading head, is of a strip-shaped plate structure, the profile of the height gauge is matched with the through groove of the gauge body (8), a T-shaped groove is arranged in the middle of the contact surface of the height gauge (9) and the gauge body (8) along the length direction and is used for installing the depth gauge (11), the height gauge and the gauge are in clearance fit, and the depth gauge (11) can freely slide in the height gauge (9); the height gauge limiting head (10) is fixed at one end of the height gauge (9), the width and the thickness of the height gauge limiting head are larger than those of the height gauge (9), the height gauge (9) is placed in the through groove of the gauge body (8), and the height gauge limiting head (10) abuts against the end face, provided with the narrow groove, of one end of the gauge body (8) and is used for preventing the height gauge (9) from moving downwards;
the depth gauge (11) is used for measuring the depths of a rivet head and a core and is of a strip-shaped plate structure, a stepped bulge is arranged in the middle of the depth gauge along the length direction, the stepped bulge of the upper half part is higher than the stepped bulge of the lower half part, and the stepped bulge of the upper half part is arranged in a narrow groove of the gauge body (8) and used for limiting the movement of the depth gauge (11); the tail of the depth gauge (11) is connected with a depth gauge probe (12) by adopting threaded connection and is used for realizing the measurement of the depth with smaller diameter;
the digital display device comprises a digital display frame (1), a digital display moving grid (2), a starting button (3), a reset button (4), a recording button (5), a battery (6), a single chip microcomputer module (7) and a digital display screen (15), wherein the digital display frame, the digital display moving grid, the starting button (3), the reset button (4), the recording button (5), the battery, the single chip microcomputer module (7) and the digital display screen (15) form digital display components, and the digital display components are provided with two groups with the same structure and are respectively used for realizing digital display of height and depth; the digital display frames (1) are used as supporting structures of the digital display parts and are of plate-shaped structures, the two digital display frames (1) are respectively positioned on the front surface and the back surface of one end, provided with the narrow groove, of the ruler body (8), one digital display frame (1) is fixedly connected with the height ruler (9), the other digital display frame (1) is fixedly connected to the stepped bulge on the upper half part of the depth ruler (11), so that the two digital display frames (1) can respectively slide along with the height ruler (9) and the depth ruler (11), the two digital display frames (1) are mutually independent, a certain gap is reserved between the two digital display frames, the tightening screws (13) are positioned in the gap between the two digital display frames (1) and do not interfere with the two digital display frames; all be fixed with digital display movable grid (2) on every digital display frame (1), start button (3), reset button (4), record button (5), battery (6), single chip module (7) and digital display screen (15), wherein, the position and two glass fixed grids (17) one-to-one of two digital display movable grid (2), start button (3) are used for the switching on and shutting down, reset button (4) are used for the zero setting, record button (5) are used for taking notes measuring process numerical value, single chip module (7) show the numerical value feedback of size on digital display screen (15), battery (6) are used for the power supply.
2. The tool for inspecting the concave-convex amount of the special rivet according to claim 1, wherein the two digital display frames (1) are fixedly connected with the height gauge (9) and the depth gauge (11) through digital display frame fixing screws (14) respectively.
3. A tool for inspecting the concavo-convex amount of a special rivet according to claim 1, wherein the blade (8) is made of steel.
4. The tool for inspecting the concave-convex amount of the special rivet according to claim 1, wherein the digital display frame (1) is made of alloy steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211243446.8A CN115451779B (en) | 2022-10-12 | 2022-10-12 | Tool for checking concave-convex amount of special rivet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211243446.8A CN115451779B (en) | 2022-10-12 | 2022-10-12 | Tool for checking concave-convex amount of special rivet |
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| CN115451779B CN115451779B (en) | 2024-04-16 |
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| SU1345051A1 (en) * | 1986-01-08 | 1987-10-15 | Предприятие П/Я А-7760 | Device for checking depth of location of inner grooves in parts |
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