Method for using a comprehensive inspection tool for crankshaft shoulder outer diameter and thickness

Abstract

The present invention discloses a crankshaft shoulder outer diameter and thickness comprehensive inspection tool, which is a long strip plate, and the middle parts of the ends of both ends of the inspection tool are respectively provided with V-shaped grooves parallel to the wide side, and the first, second, third and fourth scale lines parallel to the wide side of the inspection tool are sequentially provided at the same positions of the wide sides of the inspection tool, and the narrow surface of one side of the inspection tool is provided with a first detection block and a second detection block of the same thickness, and the narrow surface of the other side is provided with a third detection block and a fourth detection block of the same thickness, wherein the first detection block is directly opposite to the third detection block, and the second detection block is directly opposite to the fourth detection block. This inspection tool has a simple structure, is easy to operate, has a low manufacturing cost, and has a high recognition accuracy and efficiency. The present invention also discloses a method for using a crankshaft shoulder outer diameter and thickness comprehensive inspection tool.

Description

Technical Field

[0001] The invention relates to automobile parts detection technology, in particular to a method for using a crankshaft shoulder outer diameter and thickness comprehensive detection tool. Background Art

[0002] The crankshaft of a commercial vehicle is one of the engine components, which has a complex shape and is difficult to machine.

[0003] The crankshaft is a key component of the automobile engine, and its assembly requirements are relatively high. The height and thickness of the crankshaft main journal and connecting rod neck steps, especially the height of the main journal step where the thrust stop is located, need to be guaranteed because the thrust plate needs to be installed to prevent the axial movement of the crankshaft. At present, the outer circle of the crankshaft shoulder is usually detected by direct measurement with a vernier caliper in the machining industry. When this detection method detects the thickness of the outer circle of the shoulder, the crankshaft needs to be erected to detect the thickness of the outer circle of the shoulder. The skill requirements of the inspector are high. Affected by the detection technique, this detection method has a large error, is prone to misjudgment, and there is a safety issue in the upright measurement of the crankshaft. In addition, this detection method cannot fully measure the height of any position of the outer circle of the crankshaft shoulder, and cannot identify defective products. Summary of the invention

[0004] The purpose of the present invention is to provide a method for using a crankshaft shoulder outer diameter and thickness comprehensive inspection tool to overcome the shortcomings of the prior art. The inspection tool has a simple structure, convenient operation, low manufacturing cost, high recognition accuracy and efficiency.

[0005] The technical solution for achieving the purpose of the present invention is:

[0006] A crankshaft shoulder outer diameter and thickness comprehensive gauge, the comprehensive gauge is a long strip, the two side surfaces with large areas on the gauge are wide surfaces, the wide surfaces include long sides and wide sides, the two side surfaces with small areas are narrow surfaces, V-shaped grooves parallel to the wide sides of the gauge are respectively provided in the middle of the ends at both ends of the gauge, the first scale line, the second scale line, the third scale line and the fourth scale line parallel to the wide sides of the gauge are sequentially provided at the same position of the wide sides on both sides of the gauge, the first detection block and the second detection block with the same thickness are provided on the narrow surface of one side of the gauge, and the third detection block and the fourth detection block with the same thickness are provided on the narrow surface of the other side, wherein the first detection block is directly opposite to the third detection block, and the second detection block is directly opposite to the fourth detection block.

[0007] The surfaces of the first detection block, the second detection block, the third detection block and the fourth detection block facing outward and parallel to the long sides of the gauge are respectively the first detection surface, the second detection surface, the third detection surface and the fourth detection surface, and the end surfaces of the narrow surface of the gauge are respectively the first contact surface, the second contact surface, the third contact surface and the fourth contact surface.

[0008] 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 rounded corners are arranged at both ends of the gauge.

[0009] The thickness of the first detection block is smaller than the thickness of the third detection block.

[0010] The first scale line is the minimum limit size of the outer diameter of the first crankshaft shoulder, the second scale line is the maximum limit size of the outer diameter of the first crankshaft shoulder, the third scale line is the maximum limit size of the outer diameter of the second crankshaft shoulder, and the fourth scale line is the minimum limit size of the outer diameter of the second crankshaft shoulder.

[0011] The method for using the above-mentioned crankshaft shoulder outer diameter and thickness comprehensive inspection tool comprises the following steps:

[0012] (1) Measure the outer diameter of the first crankshaft shoulder. Fit the inclined surface in the groove close to the first scale line on the inspection fixture tightly against the main journal of the crankshaft to be inspected, and fit the third contact surface tightly against the first shoulder surface of the crankshaft to be inspected. Visually inspect whether the outer edge of the crankshaft shoulder falls within the range between the first scale line and the second scale line. If the outer edge of the crankshaft shoulder falls within the range between the first scale line and the second scale line, the crankshaft shoulder outer diameter is judged to be qualified; if the outer edge of the crankshaft shoulder falls outside the range between the first scale line and the second scale line, the crankshaft shoulder outer diameter is judged to be unqualified.

[0013] (2) Measure the outer diameter thickness of the first crankshaft shoulder. Fit the inclined surface in the groove near the first engraved line on the gauge closely to the main journal of the crankshaft to be inspected, and fit the third inspection surface closely to the second shoulder surface of the crankshaft to be inspected. Visually inspect the first shoulder surface and the third inspection surface of the crankshaft to be inspected. If the first shoulder surface and the third contact surface of the crankshaft to be inspected fit together, the outer diameter thickness dimension of the shoulder is qualified. If the first shoulder surface and the third contact surface of the crankshaft to be inspected do not fit together, rotate the gauge 180° along the long side. The inclined surface in the groove near the first engraved line on the gauge is still closely to the main journal of the crankshaft to be inspected. At the same time, the first contact surface is closely to the first shoulder surface of the crankshaft to be inspected. Visually inspect the first inspection surface and the second shoulder surface of the crankshaft to be inspected. If the first inspection surface fits together with the second shoulder surface of the crankshaft to be inspected, the outer diameter thickness dimension of the shoulder is qualified. If the first inspection surface does not fit together with the second shoulder surface of the crankshaft to be inspected, the outer diameter thickness dimension of the shoulder is unqualified.

[0014] (3) To measure the outer diameter and thickness of the second crankshaft shoulder, it is only necessary to rotate the gauge 180° along the wide side based on the measurement of the outer diameter and thickness of the first crankshaft shoulder. The remaining operating steps are the same as those for measuring the outer diameter and thickness of the first crankshaft shoulder.

[0015] The thickness of the first detection block is 0.65 +0.10 mm, the thickness of the third test block is 1.05 0 -0.1 mm.

[0016] The distances between the first scale line and the second scale line and the wide side of the gauge close to the first scale line are 4.75 respectively. +0.1 0mm and 5.55 0 -0.1 mm, the distances between the third and fourth scale lines and the wide side of the gauge close to the fourth scale line are 13.3 0 -0.1 mm and 12.5 +0.1 0mm.

[0017] The intersection of the two inclined surfaces in the groove is 90 degrees, and the depth of the groove is 2mm.

[0018] The width of the gauge is less than or equal to 35 mm to prevent the gauge from interfering with the crankshaft journal shoulder.

[0019] The gauge is engraved with the maximum and minimum limit values ​​corresponding to the crankshaft shoulder outer diameter and the letters and values ​​corresponding to the crankshaft shoulder outer thickness to distinguish the two crankshaft shoulder outer diameters and thicknesses.

[0020] The roughness of all surfaces on the inspection fixture is Ra0.4 to prevent the journal from being scratched when the inspection fixture contacts the finished crankshaft journal surface.

[0021] The inspection fixture has a simple structure, is easy to operate, has a low manufacturing cost, and has a high recognition accuracy and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an embodiment;

[0023] Figure 2 It is a left side view of the embodiment;

[0024] Figure 3 A schematic diagram of detecting the outer diameter and thickness of a crankshaft shoulder in an embodiment;

[0025] Figure 4 for Figure 3 Enlarged view of point P in .

[0026] In the figure, 1. first scale line 2. second scale line 3. third scale line 4. fourth scale line 5. first detection block 51. first detection surface 52. first contact surface 6. second detection block 61. second detection surface 62. second contact surface 7. third detection block 71. third detection surface 72. third contact surface 8. fourth detection block 81. fourth detection surface 82. fourth contact surface H. gauge width a. first detection block thickness b. third detection block thickness 9. groove 10. crankshaft 11. crankshaft journal shoulder 12. crankshaft main journal 13. crankshaft first shoulder surface 14. crankshaft second shoulder surface. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the present invention is not limited thereto.

[0028] Example:

[0029] Reference Figure 1-Figure 2 A comprehensive inspection tool for the outer diameter and thickness of a crankshaft shoulder, the comprehensive inspection tool is a long strip, the two sides with large areas on the inspection tool are wide sides, the wide sides include long sides and wide sides, the two sides with small areas are narrow sides, V-shaped grooves 9 parallel to the wide sides of the inspection tool are respectively provided in the middle of the ends at both ends of the inspection tool, the first scale line 1, the second scale line 2, the third scale line 3 and the fourth scale line 4 parallel to the wide sides of the inspection tool are sequentially provided at the same position of the wide sides on both sides of the inspection tool, a first inspection block 5 and a second inspection block 6 with the same thickness are provided on the narrow side of one side of the inspection tool, and a third inspection block 7 and a fourth inspection block 8 with the same thickness are provided on the narrow side of the other side, wherein the first inspection block 5 is directly opposite to the third inspection block 7, and the second inspection block 6 is directly opposite to the fourth inspection block 8.

[0030] 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 outward and parallel to the long sides of the gauge are respectively the first detection surface 51, the second detection surface 61, the third detection surface 71 and the fourth detection surface 81, and the end surfaces of the narrow surface of the gauge are respectively the first contact surface 52, the second contact surface 62, the third contact surface 72 and the fourth contact surface 82.

[0031] Chamfers are provided between the first detection surface 51, the second detection surface 61, the third detection surface 71 and the fourth detection surface 81 and the first contact surface 52, the second contact surface 62, the third contact surface 72 and the fourth contact surface 82 respectively. Chamfers are provided at both ends of the gauge, and the radius of the chamfer is 8 mm.

[0032] The thickness of the first detection block 5 is smaller than the thickness of the third detection block 7 .

[0033] The first scale line 1 is the minimum limit size of the outer diameter of the first crankshaft shoulder, the second scale line 2 is the maximum limit size of the outer diameter of the first crankshaft shoulder, the third scale line 3 is the maximum limit size of the outer diameter of the second crankshaft shoulder, and the fourth scale line 4 is the minimum limit size of the outer diameter of the second crankshaft shoulder.

[0034] like Figure 3 , Figure 4 As shown, the method for using the above-mentioned crankshaft shoulder outer diameter and thickness comprehensive inspection tool comprises the following steps:

[0035] (1) Measure the outer diameter of the shoulder of the first crankshaft 10. Fit the inclined surface in the groove 9 close to the first scale line 1 on the inspection fixture tightly with the main journal 12 of the crankshaft to be inspected, and fit the third contact surface 72 tightly with the first shoulder surface 13 of the crankshaft to be inspected. Visually inspect whether the outer edge of the crankshaft shoulder falls within the range between the first scale line 1 and the second scale line 2. If the outer edge of the crankshaft shoulder falls within the range between the first scale line 1 and the second scale line 2, the outer diameter of the crankshaft shoulder is determined to be qualified; if the outer edge of the crankshaft shoulder falls outside the range between the first scale line 1 and the second scale line 2, the outer diameter of the crankshaft shoulder is determined to be unqualified.

[0036] (2) Measure the outer diameter thickness of the shoulder of the first crankshaft 10. Fit the inclined surface in the groove 9 near the first scale line 1 on the inspection fixture tightly with the main journal 12 of the inspected crankshaft, and fit the third inspection surface 71 tightly with part of the second shoulder surface 14 of the inspected crankshaft. Visually inspect the first shoulder surface 13 and the third inspection surface 71 of the inspected crankshaft. If the first shoulder surface 13 and the third contact surface 72 of the inspected crankshaft fit, the outer diameter thickness of the shoulder is qualified. If the first shoulder surface 13 and the third contact surface 72 of the inspected crankshaft do not fit, move the inspection fixture along the The long side is rotated 180°, and the inclined surface in the groove 9 close to the first engraved line 1 on the inspection fixture is still tightly fitted with the main journal 12 of the crankshaft to be inspected, and the first contact surface 52 is tightly fitted with the first shoulder surface 13 of the crankshaft to be inspected. Visually inspect the first inspection surface 51 and the second shoulder surface 14 of the crankshaft to be inspected. If the first inspection surface 51 fits with the second shoulder surface 14 of the crankshaft to be inspected, the outer diameter thickness dimension of the shoulder is qualified. If the first inspection surface 51 does not fit with the second shoulder surface 14 of the crankshaft to be inspected, the outer diameter thickness dimension of the shoulder is unqualified.

[0037] (3) To measure the outer diameter and thickness of the shoulder of the second type crankshaft 10, it is only necessary to rotate the gauge 180° along the wide side based on the measurement of the outer diameter and thickness of the shoulder of the first type crankshaft. The remaining operating steps are the same as those for measuring the outer diameter and thickness of the shoulder of the first type crankshaft.

[0038] The thickness a of the first detection block 5 is 0.65 +0.1 0 mm, the thickness b of the third detection block 7 is 1.05 0 -0.1mm, in this example, the thickness a of the first detection block is 0.65 mm, and the thickness b of the third detection block is 1.05 mm.

[0039] The distances between the first score line 1 and the second score line 2 and the wide side close to the first score line 1 are 4.75 respectively. +0.1 0mm and 5.55 0 -0.1 mm, in this case 4.75 mm and 5.55 mm, the distances between the third scale line 3 and the fourth scale line 4 and the wide side close to the fourth scale line 4 are 13.3 mm and 13.3 mm, respectively. 0 -0.1 mm and 12.5 +0.1 0mm, in this case 13.3mm and 12.5mm.

[0040] The intersection of the two inclined surfaces in the groove 9 is 90 degrees, and the depth of the groove 9 is 2mm.

[0041] The width H of the gauge is less than or equal to 35 mm, and in this case is 35 mm, to prevent the gauge from interfering with the crankshaft journal shoulder.

[0042] The gauge is engraved with the maximum and minimum limit values ​​corresponding to the crankshaft shoulder outer diameter and the letters and values ​​corresponding to the crankshaft shoulder outer thickness to distinguish the two crankshaft shoulder outer diameters and thicknesses.

[0043] The roughness of all surfaces on the inspection fixture is Ra0.4 to prevent the journal from being scratched when the inspection fixture contacts the finished crankshaft journal surface.

Claims

1. A method for using a crankshaft shoulder outer diameter and thickness comprehensive inspection tool, characterized in that: The comprehensive inspection tool is a long strip, the two sides with large areas on the inspection tool are wide sides, the wide sides include long sides and wide sides, the two sides with small areas are narrow sides, the middle of the ends of both ends of the inspection tool are respectively provided with V-shaped grooves parallel to the wide sides of the inspection tool, the first scale line, the second scale line, the third scale line and the fourth scale line parallel to the wide sides of the inspection tool are sequentially provided at the same position of the wide sides of the inspection tool, the first detection block and the second detection block with the same thickness are provided on the narrow side of one side of the inspection tool, and the third detection block and the fourth detection block with the same thickness are provided on the narrow side of the other side, wherein the first detection block is directly opposite to the third detection block, and the second detection block is directly opposite to the fourth detection block; The surfaces of the first detection block, the second detection block, the third detection block and the fourth detection block facing outwards and parallel to the long sides of the gauge are respectively the first detection surface, the second detection surface, the third detection surface and the fourth detection surface, and the end surfaces of the narrow surface of the gauge are respectively the first contact surface, the second contact surface, the third contact surface and the fourth contact surface; The method for using the comprehensive inspection tool comprises the following steps: (1) Measure the outer diameter of the first crankshaft shoulder. Fit the inclined surface in the groove close to the first scale line on the inspection fixture tightly against the main journal of the crankshaft to be inspected, and fit the third contact surface tightly against the first shoulder surface of the crankshaft to be inspected. Visually inspect whether the outer edge of the crankshaft shoulder falls within the range between the first scale line and the second scale line. If the outer edge of the crankshaft shoulder falls within the range between the first scale line and the second scale line, the crankshaft shoulder outer diameter is judged to be qualified; if the outer edge of the crankshaft shoulder falls outside the range between the first scale line and the second scale line, the crankshaft shoulder outer diameter is judged to be unqualified. (2) Measure the outer diameter thickness of the first crankshaft shoulder. Fit the inclined surface in the groove near the first engraved line on the gauge closely to the main journal of the crankshaft to be inspected, and fit the third inspection surface closely to the second shoulder surface of the crankshaft to be inspected. Visually inspect the first shoulder surface and the third inspection surface of the crankshaft to be inspected. If the first shoulder surface and the third contact surface of the crankshaft to be inspected fit together, the outer diameter thickness dimension of the shoulder is qualified. If the first shoulder surface and the third contact surface of the crankshaft to be inspected do not fit together, rotate the gauge 180° along the long side. The inclined surface in the groove near the first engraved line on the gauge is still closely to the main journal of the crankshaft to be inspected. At the same time, the first contact surface is closely to the first shoulder surface of the crankshaft to be inspected. Visually inspect the first inspection surface and the second shoulder surface of the crankshaft to be inspected. If the first inspection surface fits together with the second shoulder surface of the crankshaft to be inspected, the outer diameter thickness dimension of the shoulder is qualified. If the first inspection surface does not fit together with the second shoulder surface of the crankshaft to be inspected, the outer diameter thickness dimension of the shoulder is unqualified. (3) To measure the outer diameter and thickness of the second crankshaft shoulder, it is only necessary to rotate the gauge 180° along the wide side based on the measurement of the outer diameter and thickness of the first crankshaft shoulder. The remaining operating steps are the same as those for measuring the outer diameter and thickness of the first crankshaft shoulder.

2. The method for using the crankshaft shoulder outer diameter and thickness comprehensive inspection tool according to claim 1 is characterized in that: 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 rounded corners are arranged at both ends of the gauge.

3. The method for using the crankshaft shoulder outer diameter and thickness comprehensive inspection tool according to claim 1, characterized in that: The thickness of the first detection block is smaller than the thickness of the third detection block.

4. The method for using the crankshaft shoulder outer diameter and thickness comprehensive inspection tool according to claim 1, characterized in that: The first scale line is the minimum limit size of the outer diameter of the first crankshaft shoulder, the second scale line is the maximum limit size of the outer diameter of the first crankshaft shoulder, the third scale line is the maximum limit size of the outer diameter of the second crankshaft shoulder, and the fourth scale line is the minimum limit size of the outer diameter of the second crankshaft shoulder.

Images