CN111426253A - Use method of comprehensive checking fixture for diameter and thickness of outer circle of crankshaft shoulder - Google Patents
Use method of comprehensive checking fixture for diameter and thickness of outer circle of crankshaft shoulder Download PDFInfo
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- CN111426253A CN111426253A CN202010386139.XA CN202010386139A CN111426253A CN 111426253 A CN111426253 A CN 111426253A CN 202010386139 A CN202010386139 A CN 202010386139A CN 111426253 A CN111426253 A CN 111426253A
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- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000001514 detection method Methods 0.000 claims abstract description 127
- 208000029154 Narrow face Diseases 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000011324 bead Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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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
- G01B5/08—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
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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
- G01B5/003—Measuring of motor parts
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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
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- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a comprehensive checking fixture for the diameter and the thickness of an excircle of a crankshaft shoulder, which is a long strip plate, wherein the middle parts of the end heads at two ends of the checking fixture are respectively provided with a V-shaped groove parallel to a wide edge, a first scribed line, a second scribed line, a third scribed line and a fourth scribed line which are parallel to the wide edge of the checking fixture are sequentially arranged at the same positions of the wide surfaces at two sides of the checking fixture, a first detection block and a second detection block which are the same in thickness are arranged on the narrow surface at one side of the checking fixture, a third detection block and a fourth detection block which are the same in thickness are arranged on the narrow surface at the other side of the checking fixture, wherein the first detection block is just opposite to the third detection block, and the second detection. The checking fixture is simple in structure, convenient to operate, low in manufacturing cost, high in identification accuracy and efficiency. The invention also discloses a use method of the comprehensive checking fixture for the diameter and the thickness of the outer circle of the crankshaft shoulder.
Description
Technical Field
The invention relates to the detection technology of automobile parts, in particular to a using method of a comprehensive checking fixture for the diameter and the thickness of an outer circle of a crankshaft shoulder.
Background
The commercial vehicle crankshaft is one of engine components, and the shape is complex and the machining difficulty is high.
The crankshaft is a key component of an automobile engine, and the assembly requirement of the crankshaft is high. The height and the thickness of the steps of the main journal of the crankshaft and the connecting rod journal, particularly the height of the step of the main journal where the thrust stop is located, can prevent the axial movement of the crankshaft due to the fact that the thrust plate needs to be installed, and therefore the excircle of the shoulder of the crankshaft needs to be guaranteed. At present, the excircle of the shoulder of the crankshaft is generally detected in a mode of direct measurement by a vernier caliper in the machining industry. When this detection mode detects circular bead excircle thickness, need to erect the bent axle and just can detect circular bead excircle thickness, require the school height to the inspector skill, receive the influence of detection gimmick, this detection mode error is great, easily produces the erroneous judgement and the bent axle erects and measures there is the security. In addition, the height of any position of the excircle of the crankshaft shoulder cannot be completely measured by the detection mode, and defective products cannot be identified.
Disclosure of Invention
The invention aims to provide a using method of a comprehensive checking fixture for the diameter and the thickness of an outer circle of a crankshaft shoulder, aiming at the defects of the prior art. The checking fixture is simple in structure, convenient to operate, low in manufacturing cost, high in identification accuracy and efficiency.
The technical scheme for realizing the purpose of the invention is as follows:
the comprehensive checking fixture is a long batten, two side faces with large area on the checking fixture are wide faces, each wide face comprises a long side and a wide side, two side faces with small area are narrow faces, the middle parts of the end heads at the two ends of the checking fixture are respectively provided with a V-shaped groove parallel to the wide sides of the checking fixture, a first scribed line, a second scribed line, a third scribed line and a fourth scribed line which are parallel to the wide sides of the checking fixture are sequentially arranged at the same positions of the wide faces at the two sides of the checking fixture, a first detection block and a second detection block which are the same in thickness are arranged on the narrow face at one side of the scribed line, a third detection block and a fourth detection block which are the same in thickness are arranged on the narrow face at the other side of the checking fixture, the first detection block is right opposite to the third detection block, and the second detection.
The first detection block, the second detection block, the third detection block and the fourth detection block are respectively a first detection surface, a second detection surface, a third detection surface and a fourth detection surface facing outwards and parallel to the long edge of the detection tool, and the end surfaces of the narrow surfaces of the detection tool are respectively a first contact surface, a second contact surface, a third contact surface and a fourth contact surface.
And chamfers are arranged between the first detection surface, the second detection surface, the third detection surface and the fourth detection surface and between the first contact surface, the second contact surface, the third contact surface and the fourth contact surface respectively, and fillets are arranged at two ends of the detection tool.
The thickness of the first detection block is smaller than that of the third detection block.
The first scribing line is the minimum limit size of the diameter of the outer circle of the first crankshaft shoulder, the second scribing line is the maximum limit size of the diameter of the outer circle of the first crankshaft shoulder, the third scribing line is the maximum limit size of the diameter of the outer circle of the second crankshaft shoulder, and the fourth scribing line is the minimum limit size of the diameter of the outer circle of the second crankshaft shoulder.
The use method of the comprehensive checking fixture for the diameter and the thickness of the outer circle of the crankshaft shoulder comprises the following steps:
(1) measuring the diameter of the excircle of the first crankshaft shoulder, closely attaching an inclined plane in a groove close to the first scribed line on the detection tool to a main journal of the detected crankshaft, closely attaching a third contact surface to the first shoulder surface of the detected crankshaft, visually observing whether the excircle sideline of the crankshaft shoulder falls in the range between the first scribed line and the second scribed line, and judging that the excircle diameter of the crankshaft shoulder is qualified if the excircle sideline of the detected crankshaft shoulder falls in the range between the first scribed line and the second scribed line; if the excircle boundary line of the detected crankshaft shoulder falls outside the range between the first scribed line and the second scribed line, judging that the excircle diameter of the crankshaft shoulder is unqualified;
(2) measuring the thickness of the excircle of the first crankshaft shoulder, closely attaching an inclined plane in a groove close to a first groove on a detection tool to a main journal of a detected crankshaft, closely attaching a third detection surface to a second shoulder surface part of the detected crankshaft, visually observing the first shoulder surface and the third detection surface of the detected crankshaft, ensuring that the thickness of the excircle of the shoulder is qualified if the first shoulder surface and the third contact surface of the detected crankshaft are attached, rotating the detection tool by 180 degrees along the long edge if the first shoulder surface and the third contact surface of the detected crankshaft are not attached, still closely attaching the inclined plane in the groove close to the first groove on the detection tool to the main journal of the detected crankshaft, simultaneously closely attaching the first contact surface to the first shoulder surface of the detected crankshaft, visually observing the first detection shoulder surface and the second shoulder surface of the detected crankshaft, and ensuring that the thickness of the excircle is qualified if the first detection surface is attached to the second shoulder surface of the detected crankshaft, if the first detection surface is not attached to the second shoulder surface of the detected crankshaft, the thickness dimension of the outer circle of the shoulder is unqualified;
(3) the diameter and the thickness of the excircle of the second crankshaft shoulder are measured by rotating the checking fixture along the wide edge by 180 degrees on the basis of measuring the diameter and the thickness of the excircle of the first crankshaft shoulder, and the diameter and the thickness of the excircle of the first crankshaft shoulder are measured in other operation steps.
The thickness of the first detection block is 0.65+0.1 0mm, the thickness of the third detection block is 1.050 -0.1mm。
The distances between the first scribed line and the wide edge of the gauge, close to the first scribed line, and the distances between the second scribed line and the wide edge of the gauge, close to the first scribed line, are respectively 4.75+0.1 0mm and 5.550 -0.1mm, the distances between the third scribed line and the wide edge of the gauge, close to the fourth scribed line, and the distances between the fourth scribed line and the wide edge of the gauge, close to the fourth scribed line, are respectively 13.30 -0.1mm and 12.5+0.1 0mm。
The joint of the two inclined planes in the groove is 90 degrees, and the depth of the groove is 2 mm.
The width of the checking fixture is smaller than or equal to 35mm, and the checking fixture is prevented from interfering with a shoulder of a crankshaft journal.
The maximum limit value and the minimum limit value corresponding to the excircle diameter of the crankshaft shoulder and the letter and the numerical value corresponding to the excircle thickness of the crankshaft shoulder are carved on the checking fixture so as to distinguish the excircle diameters and thicknesses of the two crankshaft shoulders.
All the plane roughness of the checking fixture is Ra0.4, so that the journal is prevented from being scratched when the checking fixture is in contact with the surface of the finish-machined crankshaft journal.
The checking fixture is simple in structure, convenient to operate, low in manufacturing cost, high in identification accuracy and efficiency.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment;
FIG. 2 is a left side view of the embodiment;
FIG. 3 is a schematic diagram illustrating the detection of the diameter and thickness of the outer circle of the crankshaft shoulder according to the embodiment;
fig. 4 is an enlarged view of fig. 3 at P.
In the figure, 1, a first scribed line 2, a second scribed line 3, a third scribed line 4, a fourth scribed line 5, a first detection block 51, a first detection surface 52, a first contact surface 6, a second detection block 61, a second detection surface 62, a second contact surface 7, a third detection block 71, a third detection surface 72, a third contact surface 8, a fourth detection block 81, a fourth detection surface 82, a fourth contact surface H, a gauge width a, a first detection block thickness b, a third detection block thickness 9, a groove 10, a crankshaft journal shoulder 12, a crankshaft main journal 13, a crankshaft first shoulder surface 14 and a crankshaft second shoulder surface.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples, but the invention is not limited thereto.
Example (b):
referring to fig. 1-2, the comprehensive checking fixture for the diameter and the thickness of the outer circle of the crankshaft shoulder is a long strip, two side faces with large area on the checking fixture are wide faces, each wide face comprises a long side and a wide side, two side faces with small area are narrow faces, the middle parts of the end heads at two ends of the checking fixture are respectively provided with a V-shaped groove 9 parallel to the wide sides of the checking fixture, a first scribed line 1, a second scribed line 2, a third scribed line 3 and a fourth scribed line 4 parallel to the wide sides of the checking fixture are sequentially arranged at the same positions of the wide faces at two sides of the checking fixture, a first detecting block 5 and a second detecting block 6 which are the same in thickness are arranged on the narrow face at one side of the checking fixture, a third detecting block 7 and a fourth detecting block 8 which are the same in thickness are arranged on the narrow face at the other side of the checking fixture, wherein the first detecting block 5 is opposite to the.
The surfaces of the first detection block 5, the second detection block 6, the third detection block 7 and the fourth detection block 8 facing outwards and parallel to the long sides of the detection tool are respectively a first detection surface 51, a second detection surface 61, a third detection surface 71 and a fourth detection surface 81, and the end surfaces of the narrow surfaces of the detection tool are respectively a first contact surface 52, a second contact surface 62, a third contact surface 72 and a fourth contact surface 82.
And chamfers are arranged between the first detection surface 51, the second detection surface 61, the third detection surface 71 and the fourth detection surface 81 and between the first contact surface 52, the second contact surface 62, the third contact surface 72 and the fourth contact surface 82 respectively, two ends of the detection tool are provided with fillets, and the radius of each fillet is 8 mm.
The thickness of the first detecting block 5 is smaller than that of the third detecting block 7.
As shown in fig. 3 and 4, the use method of the comprehensive crankshaft shoulder excircle diameter and thickness gauge comprises the following steps:
(1) measuring the diameter of the outer circle of the shoulder of the first crankshaft 10, closely attaching an inclined plane in a groove 9 close to the first scribed line 1 on a detection tool to a main journal 12 of the detected crankshaft, closely attaching a third contact surface 72 to a first shoulder surface 13 of the detected crankshaft, visually observing whether the outer circle sideline of the shoulder of the crankshaft falls in the range between the first scribed line 1 and the second scribed line 2, and if the outer circle sideline of the shoulder of the detected crankshaft falls in the range between the first scribed line 1 and the second scribed line 2, judging that the diameter of the outer circle of the shoulder of the crankshaft is qualified; if the excircle sideline of the detected crankshaft shoulder falls outside the range between the first reticle 1 and the second reticle 2, judging that the excircle diameter of the crankshaft shoulder is unqualified;
(2) measuring the thickness of the outer circle of a shoulder of a first crankshaft 10, closely attaching an inclined plane in a groove 9 close to a first scribed line 1 on a detection tool to a main journal 12 of the detected crankshaft, closely attaching a third detection surface 71 to a second shoulder 14 of the detected crankshaft, visually observing the first shoulder 13 and the third detection surface 71 of the detected crankshaft, if the first shoulder 13 and the third contact surface 72 of the detected crankshaft are attached, the thickness of the outer circle of the shoulder is qualified, if the first shoulder 13 and the third contact surface 72 of the detected crankshaft are not attached, rotating the detection tool by 180 degrees along the long edge, still closely attaching the inclined plane in the groove 9 close to the first scribed line 1 on the detection tool to the main journal 12 of the detected crankshaft, meanwhile, closely attaching a first contact surface 52 to the first shoulder 13 of the detected crankshaft, visually observing the first detection surface 51 and the second shoulder 14 of the detected crankshaft, and if the first detection surface 51 is attached to the second shoulder 14 of the detected crankshaft, the thickness dimension of the outer circle of the shoulder is qualified, and if the first detection surface 51 is not attached to the second shoulder surface 14 of the detected crankshaft, the thickness dimension of the outer circle of the shoulder is unqualified;
(3) the second measurement of 10 bent axle circular bead excircle diameters of 10, thickness only needs will examine utensil along the broadside rotation 180 on the basis of measuring first bent axle circular bead diameter, thickness, and other operation steps are with measuring first bent axle circular bead diameter, thickness.
The thickness a of the first detecting block 5 is 0.65+0.1 0mm, and the thickness b of the third detection block 7 is 1.050 -0.1mm, in this example the thickness a of the first test piece is 0.65mm and the thickness b of the third test piece is 1.05 mm.
The distances between the first scribed line 1 and the wide edge of the second scribed line 2 close to the first scribed line 1 are respectively 4.75+0.1 0mm and 5.550 -0.1mm, in this case 4.75mm and 5.55mm, the third score line 3 and the fourth score line 4 are at a distance of 13.3mm from the broad side of the fourth score line 4, respectively0 -0.1mm and 12.5+0.1 0mm, in this case 13.3mm and 12.5 mm.
The joint of the two inclined planes in the groove 9 is 90 degrees, and the depth of the groove 9 is 2 mm.
The width H of the checking tool is smaller than or equal to 35mm, in this case 35mm, and the checking tool is prevented from interfering with a shoulder of a crankshaft journal.
The maximum limit value and the minimum limit value corresponding to the excircle diameter of the crankshaft shoulder and the letter and the numerical value corresponding to the excircle thickness of the crankshaft shoulder are carved on the checking fixture so as to distinguish the excircle diameters and thicknesses of the two crankshaft shoulders.
All the plane roughness of the checking fixture is Ra0.4, so that the journal is prevented from being scratched when the checking fixture is in contact with the surface of the finish-machined crankshaft journal.
Claims (6)
1. The comprehensive detection tool is characterized in that the comprehensive detection tool is a long strip plate, two side faces with large area on the detection tool are wide faces, each wide face comprises a long edge and a wide edge, two side faces with small area are narrow faces, the middle parts of the end heads at two ends of the detection tool are respectively provided with a V-shaped groove parallel to the wide edges of the detection tool, a first scribed line, a second scribed line, a third scribed line and a fourth scribed line which are parallel to the wide edges of the detection tool are sequentially arranged at the same positions of the wide faces at two sides of the detection tool, a first detection block and a second detection block which are the same in thickness are arranged on the narrow face at one side of the detection tool, a third detection block and a fourth detection block which are the same in thickness are arranged on the narrow face at the other side of the detection tool, the first detection block is right opposite to the third detection block, and.
2. The crankshaft shoulder excircle diameter and thickness comprehensive detection tool according to claim 1, wherein the outward surfaces of the first detection block, the second detection block, the third detection block and the fourth detection block, which are parallel to the long side of the detection tool, are respectively a first detection surface, a second detection surface, a third detection surface and a fourth detection surface, and the end surfaces of the narrow surface of the detection tool are respectively a first contact surface, a second contact surface, a third contact surface and a fourth contact surface.
3. The comprehensive detection tool for the diameter and the thickness of the excircle of the crankshaft shoulder according to claim 2, wherein chamfers are arranged between the first detection surface, the second detection surface, the third detection surface and the fourth detection surface and the first contact surface, the second contact surface, the third contact surface and the fourth contact surface respectively, and fillets are arranged at two ends of the detection tool.
4. The crankshaft shoulder outer circle diameter and thickness comprehensive detection tool according to claim 1, wherein the thickness of the first detection block is smaller than that of the third detection block.
5. The crankshaft shoulder excircle diameter and thickness comprehensive testing fixture of claim 1, wherein said first score line is a minimum limit dimension of a first crankshaft shoulder excircle diameter, said second score line is a maximum limit dimension of a first crankshaft shoulder excircle diameter, said third score line is a maximum limit dimension of a second crankshaft shoulder excircle diameter, and said fourth score line is a minimum limit dimension of a second crankshaft shoulder excircle diameter.
6. The use method of the comprehensive checking fixture for the diameter and the thickness of the outer circle of the crankshaft shoulder according to any one of claims 1 to 5 is characterized by comprising the following steps of:
(1) measuring the diameter of the excircle of the first crankshaft shoulder, closely attaching an inclined plane in a groove close to the first scribed line on the detection tool to a main journal of the detected crankshaft, closely attaching a third contact surface to the first shoulder surface of the detected crankshaft, visually observing whether the excircle sideline of the crankshaft shoulder falls in the range between the first scribed line and the second scribed line, and judging that the excircle diameter of the crankshaft shoulder is qualified if the excircle sideline of the detected crankshaft shoulder falls in the range between the first scribed line and the second scribed line; if the excircle boundary line of the detected crankshaft shoulder falls outside the range between the first scribed line and the second scribed line, judging that the excircle diameter of the crankshaft shoulder is unqualified;
(2) measuring the thickness of the excircle of the first crankshaft shoulder, closely attaching an inclined plane in a groove close to a first groove on a detection tool to a main journal of a detected crankshaft, closely attaching a third detection surface to a second shoulder surface part of the detected crankshaft, visually observing the first shoulder surface and the third detection surface of the detected crankshaft, ensuring that the thickness of the excircle of the shoulder is qualified if the first shoulder surface and the third contact surface of the detected crankshaft are attached, rotating the detection tool by 180 degrees along the long edge if the first shoulder surface and the third contact surface of the detected crankshaft are not attached, still closely attaching the inclined plane in the groove close to the first groove on the detection tool to the main journal of the detected crankshaft, simultaneously closely attaching the first contact surface to the first shoulder surface of the detected crankshaft, visually observing the first detection shoulder surface and the second shoulder surface of the detected crankshaft, and ensuring that the thickness of the excircle is qualified if the first detection surface is attached to the second shoulder surface of the detected crankshaft, if the first detection surface is not attached to the second shoulder surface of the detected crankshaft, the thickness dimension of the outer circle of the shoulder is unqualified;
(3) the diameter and the thickness of the excircle of the second crankshaft shoulder are measured by rotating the checking fixture along the wide edge by 180 degrees on the basis of measuring the diameter and the thickness of the excircle of the first crankshaft shoulder, and the diameter and the thickness of the excircle of the first crankshaft shoulder are measured in other operation steps.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010386139.XA CN111426253A (en) | 2020-05-09 | 2020-05-09 | Use method of comprehensive checking fixture for diameter and thickness of outer circle of crankshaft shoulder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010386139.XA CN111426253A (en) | 2020-05-09 | 2020-05-09 | Use method of comprehensive checking fixture for diameter and thickness of outer circle of crankshaft shoulder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137904A (en) * | 2021-05-27 | 2021-07-20 | 桂林福达曲轴有限公司 | Crankshaft crank arm chamfer checking fixture and detection method thereof |
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|---|---|---|---|---|
| JPH1183413A (en) * | 1997-09-03 | 1999-03-26 | Komatsu Koki Kk | Automatic measuring device for crankshaft and its measuring method |
| CN207365841U (en) * | 2017-07-04 | 2018-05-15 | 重庆美心翼申机械股份有限公司 | A kind of bent axle Woodruff key slots and keyways detection cubing |
| CN207688800U (en) * | 2017-12-16 | 2018-08-03 | 江西腾勒动力有限公司 | Engine crankshaft thrust device side fillet measures go-no go gauge |
| CN110345840A (en) * | 2019-08-28 | 2019-10-18 | 桂林福达曲轴有限公司 | A kind of the detection template and its application method of crankshaft shoulder outside diameter |
| CN211977781U (en) * | 2020-05-09 | 2020-11-20 | 桂林福达曲轴有限公司 | Comprehensive checking fixture for diameter and thickness of outer circle of crankshaft shoulder |
-
2020
- 2020-05-09 CN CN202010386139.XA patent/CN111426253A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1183413A (en) * | 1997-09-03 | 1999-03-26 | Komatsu Koki Kk | Automatic measuring device for crankshaft and its measuring method |
| CN207365841U (en) * | 2017-07-04 | 2018-05-15 | 重庆美心翼申机械股份有限公司 | A kind of bent axle Woodruff key slots and keyways detection cubing |
| CN207688800U (en) * | 2017-12-16 | 2018-08-03 | 江西腾勒动力有限公司 | Engine crankshaft thrust device side fillet measures go-no go gauge |
| CN110345840A (en) * | 2019-08-28 | 2019-10-18 | 桂林福达曲轴有限公司 | A kind of the detection template and its application method of crankshaft shoulder outside diameter |
| CN211977781U (en) * | 2020-05-09 | 2020-11-20 | 桂林福达曲轴有限公司 | Comprehensive checking fixture for diameter and thickness of outer circle of crankshaft shoulder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137904A (en) * | 2021-05-27 | 2021-07-20 | 桂林福达曲轴有限公司 | Crankshaft crank arm chamfer checking fixture and detection method thereof |
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