Crankshaft hole measurement system, measurement level calibration method of crankshaft hole measurement system

Abstract

The present invention provides a crankshaft hole measurement system and a measurement level calibration method for the crankshaft hole measurement system. The crankshaft hole measurement system includes: a conveying device for conveying a workpiece to be measured; a positioning device including a base and a supporting structure arranged on the base, the supporting structure is used to support the workpiece to be measured, and at least part of the supporting structure is provided with a positioning part, and the positioning part is used to position the workpiece to be measured; a measuring device including a base and a measuring component, the measuring component can be movably arranged on the base, the measuring component includes a mounting structure and a detection element, the mounting structure has a mounting hole, and the detection end of the detection element can be telescopically inserted into the mounting hole to detect the inner diameter of the crankshaft hole of the workpiece to be measured. The present invention effectively solves the problem of low measurement accuracy and measurement efficiency of the existing method for measuring the inner diameter of the spindle hole.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and in particular to a crankshaft hole measurement system and a measurement level calibration method of the crankshaft hole measurement system. Background Art

[0002] At present, the machining accuracy of the main shaft hole of the engine body is required to be high, and the inner diameter measurement of the main shaft hole is usually mainly measured manually using an internal diameter micrometer. However, manual measurement has low measurement accuracy and efficiency, and increases the labor intensity of the staff. Summary of the invention

[0003] The main purpose of the present invention is to provide a crankshaft hole measurement system and a measurement grade calibration method for the crankshaft hole measurement system to solve the problems of low measurement accuracy and measurement efficiency in the prior art for the measurement method of the inner diameter of the spindle hole.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided a crankshaft hole measuring system, comprising: a conveying device for conveying a workpiece to be measured; a positioning device, comprising a base and a supporting structure arranged on the base, the supporting structure being used to support the workpiece to be measured, at least a part of the supporting structure being provided with a positioning portion, the positioning portion being used to position the workpiece to be measured; a measuring device, comprising a base and a measuring assembly, the measuring assembly being movably arranged on the base, the measuring assembly comprising a mounting structure and a detection element, the mounting structure having a mounting hole, the detection end of the detection element being telescopically inserted into the mounting hole, so as to detect the inner diameter of the crankshaft hole of the workpiece to be measured.

[0005] Furthermore, the crankshaft hole measurement system also includes: a calibration ring, which is located between the positioning device and the measuring device and is used to calibrate the detection element; wherein, after the detection element is calibrated, the inner diameter of the crankshaft hole is measured.

[0006] Further, the detection elements are in a group, each group of detection elements includes at least two detection elements arranged oppositely; or, the detection elements are in multiple groups, the multiple groups of detection elements are arranged at intervals around the center line of the mounting structure, and each group of detection elements includes at least two detection elements arranged oppositely.

[0007] Furthermore, the mounting structure includes a hollow rod body and an end cover arranged on the first end of the hollow rod body, the hollow rod body has a mounting hole; the end cover has an exhaust hole, and the measuring component also includes: a blowing structure, at least part of the blowing structure is arranged in the exhaust hole, the air inlet of the blowing structure is connected to the air supply device, and the exhaust port of the blowing structure is connected to the exhaust hole; wherein, the gas discharged from the exhaust hole is blown into the crankshaft hole of the workpiece to be measured.

[0008] Furthermore, the exhaust hole includes: a first hole segment, at least part of the blowing structure extends into the first hole segment; a plurality of second hole segments, the first end of each second hole segment is connected to the first hole segment and extends radially along the first hole segment, and the second end of each second hole segment passes through the outer circumferential surface of the end cover.

[0009] Furthermore, the mounting structure also includes a mounting seat, which is connected to the second end of the hollow rod body, and the seat body includes: a supporting seat; a floating seat, which has a through hole and a mounting portion, and the hollow rod body is inserted into the through hole, and the mounting seat and the mounting portion are connected by fasteners; a first guide rail assembly, which includes a first guide rail and a first slider slidably arranged on the first guide rail, and the floating seat is arranged on the first slider; a second guide rail assembly, which includes a second guide rail and a second slider slidably arranged on the second guide rail, and the first guide rail is arranged on the second slider; an elastic structure, one end of the elastic structure is connected to the supporting seat, and the other end of the elastic structure is connected to the floating seat; wherein the extension directions of the first guide rail and the second guide rail are arranged at an angle.

[0010] Furthermore, the detection element is a contact displacement sensor; and / or the elastic structure is a tension spring; and / or there are multiple supporting structures, the multiple supporting structures are arranged at intervals along the length direction and / or width direction of the base, and the positioning part is arranged on at least two supporting structures.

[0011] Furthermore, there are two positioning parts, one positioning part is a cylindrical pin shaft, and the other positioning part is a polygonal pin shaft; the multiple supporting structures include: multiple first supporting structures; a second supporting structure, the cylindrical pin shaft is protrudingly arranged on the second supporting structure to extend into the circular hole of the workpiece to be measured; a third supporting structure, the polygonal pin shaft is protrudingly arranged on the third supporting structure to extend into the polygonal hole of the workpiece to be measured; wherein each first supporting structure has a first supporting surface and a second supporting surface connected to each other, the first supporting surface is higher than the second supporting surface, and the first supporting surface is used to support the workpiece to be measured.

[0012] Furthermore, at least one first supporting structure has a third hole segment and a fourth hole segment that are interconnected and arranged at an angle, the third hole segment is connected to the first end of the air supply pipe, and the fourth hole segment passes through the first supporting surface; the positioning device also includes: a pressure detection device, the pressure detection device is arranged at the other end of the air supply pipe, so as to detect the air pressure value in the air supply pipe; a control module, which is electrically connected to the pressure detection device; wherein, after gas is delivered to the first hole segment through the air supply pipe, if the detection value of the pressure detection device is greater than or equal to a preset value, it is judged that the positioning device has completed the positioning of the workpiece to be measured.

[0013] According to another aspect of the present invention, a measurement level calibration method for a crankshaft hole measurement system is provided, which is applicable to the above-mentioned crankshaft hole measurement system; the measurement level calibration method comprises: step S1: calibrating a workpiece and obtaining the actual diameter value of the crankshaft hole of the calibrated workpiece; step S2: using the crankshaft hole measurement system to measure the inner diameter of the crankshaft hole of the calibrated workpiece multiple times to obtain a measurement value y, and according to the formula y=ke±△t and the fitting curve, the variable coefficient k and the compensation value △t are obtained; wherein e is the extension or compression e of the detection end of the crankshaft hole measurement system; step S2: S3: After calculating the variable coefficient k and the compensation value △t, the crankshaft hole measurement system is used to measure the inner diameter of the calibration ring to obtain the measured inner diameter d; Step S4: The measurement grade of the crankshaft hole measurement system is divided according to the grade standard and the measured inner diameter d; wherein the grade standard includes the A-level diameter range, the B-level diameter range and the C-level diameter range, the A-level diameter range is φ62.000~φ62.006mm, the B-level diameter range is φ62.007~φ62.012mm, and the C-level diameter range is φ62.013~φ62.019mm.

[0014] By applying the technical solution of the present invention, the crankshaft hole measurement system includes a conveying device, a positioning device and a measuring device, wherein the conveying device is used to convey the workpiece to be measured. The positioning device includes a base and a support structure arranged on the base, wherein the support structure is used to support the workpiece to be measured, and at least part of the support structure is provided with a positioning part, and the positioning part is used to position the workpiece to be measured. The measuring device includes a base body and a measuring component, wherein the measuring component can be movably arranged on the base body, and the measuring component includes a mounting structure and a detection element, wherein the mounting structure has a mounting hole, and the detection end of the detection element can be telescopically penetrated in the mounting hole to detect the inner diameter of the crankshaft hole of the workpiece to be measured. In this way, when the crankshaft hole (spindle hole) of the workpiece to be measured needs to be measured, the workpiece to be measured is conveyed to the positioning device by the conveying device, and the workpiece to be measured is positioned by the positioning part, and the workpiece to be measured is supported by the support structure, so as to position the workpiece to be measured. Afterwards, the detection end of the detection element is extended into the crankshaft hole to measure the inner diameter of the crankshaft hole.

[0015] Compared with the manual measurement of the inner diameter of the crankshaft hole in the prior art, the crankshaft hole measurement system in the present application can replace manual measurement of the crankshaft hole of the workpiece to be measured, thereby solving the problem of low measurement accuracy and efficiency of the measurement method of the inner diameter of the spindle hole in the prior art, improving the online measurement efficiency and accuracy, facilitating intelligent management, and reducing the labor intensity of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a crankshaft hole measurement system according to the present invention is shown;

[0018] Figure 2 Shows Figure 1 A cross-sectional view of a measuring component of a crankshaft bore measuring system;

[0019] Figure 3 Shows Figure 2 An enlarged schematic diagram of the measurement component at point A;

[0020] Figure 4 Shows Figure 2 A side view of the measuring assembly in FIG.

[0021] Figure 5 Shows Figure 1 A schematic diagram of the three-dimensional structure of the seat of the crankshaft hole measurement system;

[0022] Figure 6 Shows Figure 1 A schematic diagram of the three-dimensional structure of the positioning device of the crankshaft hole measurement system;

[0023] Figure 7 Shows Figure 6 A cross-sectional view of the first support structure of the positioning device in FIG.

[0024] The above drawings include the following reference numerals:

[0025] 10. Conveying device;

[0026] 20. Positioning device; 21. Base; 22. Support structure; 221. First support structure; 2211. First support surface; 2212. Second support surface; 2213. Third hole section; 2214. Fourth hole section; 222. Second support structure; 223. Third support structure; 23. Positioning part; 231. Cylindrical pin; 232. Polygonal pin;

[0027] 30. Measuring device; 31. seat body; 311. supporting seat; 312. floating seat; 313. elastic structure; 32. measuring assembly; 321. mounting structure; 3211. hollow rod body; 3212. end cover; 3213. exhaust hole; 32131. first hole section; 32132. second hole section; 3214. mounting seat; 322. detecting element; 3221. detecting end; 323. blowing structure;

[0028] 40. Calibration ring;

[0029] 50. Feed system;

[0030] 60. Machine base. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0033] In the present invention, unless otherwise specified, the directional words used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0034] In order to solve the problem of low measurement accuracy and efficiency in the prior art for measuring the inner diameter of a spindle hole, the present application provides a crankshaft hole measurement system and a measurement grade calibration method for the crankshaft hole measurement system.

[0035] like Figures 1 to 7 As shown, the crankshaft hole measuring system includes a conveying device 10, a positioning device 20 and a measuring device 30. The conveying device 10 is used to convey the workpiece to be measured. The positioning device 20 includes a base 21 and a support structure 22 arranged on the base 21, the support structure 22 is used to support the workpiece to be measured, and at least a part of the support structure 22 is provided with a positioning portion 23, and the positioning portion 23 is used to position the workpiece to be measured. The measuring device 30 includes a base body 31 and a measuring component 32, the measuring component 32 can be movably arranged on the base body 31, the measuring component 32 includes a mounting structure 321 and a detection element 322, the mounting structure 321 has a mounting hole, and the detection end 3221 of the detection element 322 can be telescopically penetrated in the mounting hole to detect the inner diameter of the crankshaft hole of the workpiece to be measured.

[0036] By applying the technical solution of this embodiment, when the crankshaft hole (spindle hole) of the workpiece to be measured needs to be measured, the workpiece to be measured is transported to the positioning device 20 by the transport device 10, and the workpiece to be measured is positioned by the positioning portion 23 and supported by the support structure 22, so as to position the workpiece to be measured. After that, the detection end 3221 of the detection element 322 is extended into the crankshaft hole to measure the inner diameter of the crankshaft hole.

[0037] Compared with the manual measurement of the inner diameter of the crankshaft hole in the prior art, the crankshaft hole measurement system in this embodiment can replace manual measurement of the crankshaft hole of the workpiece to be measured, thereby solving the problem of low measurement accuracy and efficiency of the measurement method of the inner diameter of the spindle hole in the prior art, improving the online measurement efficiency and accuracy, facilitating intelligent management, and reducing the labor intensity of the staff.

[0038] like Figure 1 As shown, the crankshaft hole measurement system further includes a calibration ring 40. The calibration ring 40 is located between the positioning device 20 and the measuring device 30, and is used to calibrate the detection element 322. After the detection element 322 is calibrated, the inner diameter of the crankshaft hole is measured. In this way, before the detection element 322 is used to measure the inner diameter of the crankshaft hole, the calibration ring 40 is used to calibrate the detection element 322 to ensure the measurement accuracy of the measurement system.

[0039] In this embodiment, during the process of calibration of the detection element 322 by the calibration ring 40, if the detection end 3221 of the detection element 322 shrinks or elongates, the shrinkage or elongation is recorded. In the subsequent actual measurement process, the above-mentioned elongation is subtracted or the above-mentioned contraction is added to ensure the accuracy of the subsequent actual measurement.

[0040] Optionally, the calibration ring 40 is a median calibration ring.

[0041] Optionally, the detection elements 322 are in a group, and each group of detection elements 322 includes at least two detection elements 322 arranged opposite to each other; or, the detection elements 322 are in multiple groups, and multiple groups of detection elements 322 are arranged at intervals around the center line of the mounting structure 321, and each group of detection elements 322 includes at least two detection elements 322 arranged opposite to each other. In this way, the above arrangement makes the selection of the number of groups of the detection elements 322 more flexible to meet different usage requirements and working conditions, and also improves the processing flexibility of the staff.

[0042] In this embodiment, there are three groups of detection elements 322, and the three groups of detection elements 322 are evenly distributed. Each group of detection elements 322 includes two detection elements 322 arranged opposite to each other. The three groups of measurement results are averaged to obtain the actual measurement value of the measurement system. In this way, the six detection elements 322 are distributed in a cross shape, and each group of detection elements 322 detects a diameter, and the detection accuracy is ±0.2um.

[0043] It should be noted that the number of groups of the detection elements 322 is not limited thereto and can be adjusted according to working conditions and usage requirements. Optionally, the detection elements 322 are two groups, or four groups, or five groups, or six groups, or more groups.

[0044] like Figure 2 and Figure 3 As shown, the mounting structure 321 includes a hollow rod body 3211 and an end cap 3212 disposed on the first end of the hollow rod body 3211, and the hollow rod body 3211 has a mounting hole. The end cap 3212 has an exhaust hole 3213, and the measuring assembly 32 also includes a blowing structure 323, at least part of the blowing structure 323 is disposed in the exhaust hole 3213, the air inlet of the blowing structure 323 is connected to the air supply device, and the exhaust port of the blowing structure 323 is connected to the exhaust hole 3213. The gas discharged from the exhaust hole 3213 is blown into the crankshaft hole of the workpiece to be measured. In this way, before the detection element 322 measures the crankshaft hole, the blowing structure 323 is first used to blow air into the crankshaft hole to clean the dust and impurities attached to the crankshaft hole. At the same time, the hollow cavity of the hollow rod body 3211 is convenient not only for the cable of the detection element 322 to pass through, but also for the connecting pipeline between the blowing structure 323 and the air supply device to pass through, making the exterior of the measuring device 30 tidier and avoiding leakage of cables and pipelines.

[0045] In this embodiment, an end cap 3212 is disposed on the first end of the hollow rod body 3211, and the detection element 322 is disposed on the hollow rod body 3211 and close to the first end thereof. Thus, when the measuring device 30 is required to measure the crankshaft hole, it is only necessary to extend the first end of the hollow rod body 3211 into the crankshaft hole.

[0046] In this embodiment, the above arrangement of the hollow rod body 3211 can reduce the overall weight of the mounting structure 321 and achieve a lightweight design.

[0047] Specifically, the mounting holes are arranged on the outer circumference of the hollow rod body 3211 and penetrate the outer circumference. There are three groups of mounting holes, and the three groups of mounting holes are arranged in a one-to-one correspondence with the three groups of detection elements 322 .

[0048] like Figure 3 As shown, the exhaust hole 3213 includes a first hole section 32131 and a plurality of second hole sections 32132. Among them, at least a portion of the blowing structure 323 extends into the first hole section 32131. The first end of each second hole section 32132 is connected to the first hole section 32131 and extends radially along the first hole section 32131, and the second end of each second hole section 32132 penetrates the outer peripheral surface of the end cover 3212. In this way, the above arrangement ensures that the gas entering the blowing structure 323 can be blown onto the hole wall of the crankshaft hole through the first hole section 32131 and each second hole section 32132 in sequence, thereby improving the gas flow smoothness in the measuring device 30; on the other hand, the structure of the exhaust hole 3213 is simpler, easier to process and realize, and the processing cost and difficulty of the exhaust hole 3213 are reduced.

[0049] like Figure 2 and Figure 5As shown, the mounting structure 321 also includes a mounting seat 3214, which is connected to the second end of the hollow rod body 3211. The seat body 31 includes a support seat 311, a floating seat 312, a first guide rail assembly, a second guide rail assembly and an elastic structure 313. The floating seat 312 has a through hole and a mounting portion, the hollow rod body 3211 is inserted into the through hole, and the mounting seat 3214 is connected to the mounting portion by a fastener. The first guide rail assembly includes a first guide rail and a first slider slidably arranged on the first guide rail, and the floating seat 312 is arranged on the first slider. The second guide rail assembly includes a second guide rail and a second slider slidably arranged on the second guide rail, and the first guide rail is arranged on the second slider. One end of the elastic structure 313 is connected to the support seat 311, and the other end of the elastic structure 313 is connected to the floating seat 312. Among them, the extension direction of the first guide rail and the second guide rail is arranged at an angle. In this way, the hollow rod body 3211 is installed on the floating seat 312, so that the floating seat 312 drives the measuring device 30 to float in the up and down and left and right directions relative to the support seat 311, thereby preventing the detection element 322 from being stuck by the reaction force due to the misalignment when measuring the crankshaft hole. At the same time, the elastic structure 313 is used to apply elastic tension to the floating seat 312 to prevent the hollow rod body 3211 from tilting and affecting its measurement accuracy.

[0050] In this embodiment, the above-mentioned arrangement of the mounting seat 3214 can support the second end of the hollow rod body 3211 to prevent the hollow rod body 3211 from being completely deformed.

[0051] Optionally, the extension directions of the first guide rail and the second guide rail are arranged perpendicular to each other.

[0052] Optionally, the detection element 322 is a contact displacement sensor; and / or the elastic structure 313 is a tension spring; and / or there are multiple support structures 22, and the multiple support structures 22 are arranged at intervals along the length direction and / or width direction of the base 21, and the positioning portion 23 is arranged on at least two support structures 22.

[0053] In this embodiment, the detection element 322 is a contact displacement sensor, which contacts the wall of the crankshaft hole through the extended detection end 3221, thereby detecting the inner diameter of the crankshaft hole. In this way, the measurement value of the detection element 322 is averaged as the measurement value, and the detection element 322 enters the calibration ring 40 for calibration, which is used as the reference value of the contact displacement sensor. The diameter of the calibration ring 40 is φ62 and the calibration ring 40 is used as the reference, and the measurement value of the contact displacement sensor is adjusted to be consistent with the value of the calibration ring.

[0054] In this embodiment, the elastic structure 313 is a tension spring, and two ends of the tension spring are respectively hung on the support seat 311 and the floating seat 312 .

[0055] In this embodiment, there are two groups of support structures 22, and the two groups of support structures 22 are arranged at intervals along the width direction of the base 21. Each group of support structures 22 includes three support structures 22, and the three support structures 22 are arranged at intervals along the length direction of the base 21. Among them, the positioning parts 23 are arranged on the two support structures 22, thereby improving the positioning accuracy of the positioning device 20 for the workpiece to be measured.

[0056] It should be noted that the number of the support structures 22 is not limited thereto and can be adjusted according to working conditions and usage requirements. Optionally, the number of the support structures 22 is two, three, four, five, seven, eight, or more.

[0057] like Figure 6 As shown, there are two positioning parts 23, one positioning part 23 is a cylindrical pin 231, and the other positioning part 23 is a polygonal pin 232. The multiple support structures 22 include multiple first support structures 221, second support structures 222 and third support structures 223. The cylindrical pin 231 is protrudingly arranged on the second support structure 222 to extend into the circular hole of the workpiece to be measured. The polygonal pin 232 is protrudingly arranged on the third support structure 223 to extend into the polygonal hole of the workpiece to be measured. Among them, each first support structure 221 has a first support surface 2211 and a second support surface 2212 connected to each other, the first support surface 2211 is higher than the second support surface 2212, and the first support surface 2211 is used to support the workpiece to be measured. In this way, the above-mentioned setting of the first support surface 2211 reduces the processing accuracy on the one hand; on the other hand, it ensures that the first support structure 221 can support and position the workpiece to be measured, thereby improving the positioning accuracy of the positioning device 20. At the same time, the above-mentioned setting of the positioning device 20 realizes the "one side, two pins" positioning method for the workpiece to be measured, constraining 6 degrees of freedom.

[0058] In this embodiment, the cylindrical pins 231 and the polygonal pins 232 are arranged at intervals along the length direction of the base 21, and there are four first support structures 221. The first support surface 2211 is a circular surface, and the second support surface 2212 is an annular surface, and the annular surface is arranged around the circular surface.

[0059] Optionally, at least one first support structure 221 has a third hole section 2213 and a fourth hole section 2214 that are interconnected and set at an angle, the third hole section 2213 is connected to the first end of the air supply pipe, and the fourth hole section 2214 passes through the first support surface 2211; the positioning device 20 also includes a pressure detection device and a control module. The pressure detection device is arranged at the other end of the air supply pipe to detect the air pressure value in the air supply pipe. The control module is electrically connected to the pressure detection device. After the gas is delivered to the first hole section 32131 through the air supply pipe, if the detection value of the pressure detection device is greater than or equal to the preset value, it is judged that the positioning device 20 has completed the positioning of the workpiece to be measured. In this way, the above-mentioned setting of the pressure detection device realizes the gas detection function of the positioning device 20, and only when the detection value of the pressure detection device is greater than or equal to the preset value, the positioning device 20 completes the positioning of the workpiece to be measured.

[0060] Optionally, the third hole segment 2213 and the fourth hole segment 2214 are perpendicular to each other, and an extending direction of the fourth hole segment 2214 is perpendicular to the first supporting surface 2211 and is vertically upward.

[0061] In this embodiment, the two oppositely disposed first supporting structures 221 have a third hole segment 2213 and a fourth hole segment 2214 that are interconnected and disposed at an angle.

[0062] Optionally, the crankshaft hole measurement system further includes a marking device, which is used to mark the measurement grade on the surface of the machine body for easy manual identification.

[0063] like Figure 1 As shown, the crankshaft hole measuring system further includes a feeding system 50 , which is drivingly connected to the measuring device 30 to realize the feeding movement of the measuring device 30 .

[0064] like Figure 1 As shown, the crankshaft hole measuring system further includes a machine base 60, on which the measuring device 30 and the positioning device 20 are both arranged. The machine base 60 is cast and fixed by embedding in concrete with anchor bolts.

[0065] The present application also provides a measurement level calibration method for a crankshaft hole measurement system, which is applicable to the above-mentioned crankshaft hole measurement system; the measurement level calibration method includes:

[0066] Step S1: calibrating the workpiece and obtaining the actual diameter value of the crankshaft hole of the calibrated workpiece;

[0067] Step S2: Use the crankshaft hole measurement system to measure the inner diameter of the crankshaft hole of the calibration workpiece multiple times to obtain a measurement value y, and obtain a variable coefficient k and a compensation value △t according to the formula y=ke±△t and the fitting curve; wherein e is the extension or compression e of the detection end of the crankshaft hole measurement system;

[0068] Step S3: After the variable coefficient k and the compensation value △t are calculated, the inner diameter of the ring to be calibrated is measured using a crankshaft hole measurement system to obtain a measured inner diameter d;

[0069] Step S4: The crankshaft hole measurement system is divided into measurement grades according to the grade standard and the measured inner diameter d. The grade standard includes the A-grade diameter range, the B-grade diameter range and the C-grade diameter range. The A-grade diameter range is φ62.000~φ62.006mm, the B-grade diameter range is φ62.007~φ62.012mm, and the C-grade diameter range is φ62.013~φ62.019mm.

[0070] Specifically, the crankshaft hole diameter of the calibration workpiece is measured using three-coordinate measurement to obtain the value and ensure the accuracy of the measured data, start the feed system of the crankshaft hole measurement equipment until the detection end of the detection element contacts the hole wall of the crankshaft hole for measurement, and compare the detection element with the reference value to obtain the compression or extension amount e. Among them, according to the formula: the measured value y=ke±△t, the variable coefficient k and the compensation value △t are obtained. The variable coefficient k is related to the characteristics of the sensor, the compression or extension amount is e, and the extension is taken as a positive value, and the compensation value △t is related to the ambient temperature, vibration, etc.

[0071] In this embodiment, in step S4, if the measured inner diameter d is not within the grade standard, an alarm is given.

[0072] In this embodiment, the measurement level calibration method further includes step S5:

[0073] Use a marking device to mark the measurement grade results on the body.

[0074] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0075] The crankshaft hole measurement system includes a conveying device, a positioning device and a measuring device. The conveying device is used to convey the workpiece to be measured. The positioning device includes a base and a support structure arranged on the base. The support structure is used to support the workpiece to be measured. At least part of the support structure is provided with a positioning part, and the positioning part is used to position the workpiece to be measured. The measuring device includes a base and a measuring component. The measuring component can be movably arranged on the base. The measuring component includes a mounting structure and a detection element. The mounting structure has a mounting hole. The detection end of the detection element can be telescopically penetrated in the mounting hole to detect the inner diameter of the crankshaft hole of the workpiece to be measured. In this way, when it is necessary to measure the crankshaft hole (spindle hole) of the workpiece to be measured, the workpiece to be measured is conveyed to the positioning device by the conveying device, and the workpiece to be measured is positioned by the positioning part and supported by the support structure to position the workpiece to be measured. Afterwards, the detection end of the detection element is extended into the crankshaft hole to measure the inner diameter of the crankshaft hole.

[0076] Compared with the manual measurement of the inner diameter of the crankshaft hole in the prior art, the crankshaft hole measurement system in the present application can replace manual measurement of the crankshaft hole of the workpiece to be measured, thereby solving the problem of low measurement accuracy and efficiency of the measurement method of the inner diameter of the spindle hole in the prior art, improving the online measurement efficiency and accuracy, facilitating intelligent management, and reducing the labor intensity of the staff.

[0077] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0078] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0079] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A crankshaft hole measurement system, characterized in that: include: A conveying device (10) for conveying a workpiece to be measured; A positioning device (20), comprising a base (21) and a support structure (22) arranged on the base (21), the support structure (22) being used to support the workpiece to be measured, and at least a portion of the support structure (22) being provided with a positioning portion (23), the positioning portion (23) being used to position the workpiece to be measured; A measuring device (30), comprising a base (31) and a measuring assembly (32), wherein the measuring assembly (32) is movably arranged on the base (31), the measuring assembly (32) comprising a mounting structure (321) and a detection element (322), the mounting structure (321) having a mounting hole, and a detection end (3221) of the detection element (322) being telescopically arranged in the mounting hole, so as to detect the inner diameter of the crankshaft hole of the workpiece to be measured; The mounting structure (321) comprises a hollow rod body (3211) and an end cover (3212) arranged on a first end of the hollow rod body (3211), the hollow rod body (3211) having the mounting hole; the end cover (3212) having an exhaust hole (3213), and the measuring assembly (32) further comprises: an air blowing structure (323), wherein at least a portion of the air blowing structure (323) is disposed in the exhaust hole (3213), an air inlet of the air blowing structure (323) is communicated with an air supply device, and an exhaust port of the air blowing structure (323) is communicated with the exhaust hole (3213); Wherein, the gas discharged from the exhaust hole (3213) is blown into the crankshaft hole of the workpiece to be measured; The exhaust hole (3213) comprises: a first hole section (32131), wherein at least a portion of the air blowing structure (323) extends into the first hole section (32131); a plurality of second hole segments (32132), wherein the first end of each second hole segment (32132) is connected to the first hole segment (32131) and extends radially along the first hole segment (32131), and the second end of each second hole segment (32132) passes through the outer circumferential surface of the end cover (3212); The support structure (22) comprises: A plurality of first support structures (221), each of the first support structures (221) having a first support surface (2211) and a second support surface (2212) connected to each other, the first support surface (2211) being higher than the second support surface (2212), and the first support surface (2211) being used to support the workpiece to be measured; At least one of the first supporting structures (221) has a third hole segment (2213) and a fourth hole segment (2214) which are connected to each other and arranged at an angle, the third hole segment (2213) is connected to the first end of the air supply pipe, and the fourth hole segment (2214) passes through the first supporting surface (2211); the positioning device (20) further comprises: A pressure detection device, which is arranged at the other end of the air supply pipeline to detect the air pressure value in the air supply pipeline; A control module, electrically connected to the pressure detection device; Wherein, after gas is delivered to the first hole section (32131) through the gas delivery pipeline, if the detection value of the pressure detection device is greater than or equal to a preset value, it is determined that the positioning device (20) has completed positioning the workpiece to be measured.

2. The crankshaft hole measurement system according to claim 1, characterized in that: The crankshaft hole measurement system also includes: A calibration ring (40), the calibration ring (40) being located between the positioning device (20) and the measuring device (30) and being used to calibrate the detection element (322); wherein after the detection element (322) has been calibrated, the inner diameter of the crankshaft hole is measured.

3. The crankshaft hole measurement system according to claim 1, characterized in that: The detection elements (322) are in a group, and each group of the detection elements (322) includes at least two detection elements (322) arranged opposite to each other; or, the detection elements (322) are in a plurality of groups, and the plurality of groups of the detection elements (322) are arranged at intervals around a center line of the mounting structure (321), and each group of the detection elements (322) includes at least two detection elements (322) arranged opposite to each other.

4. The crankshaft hole measurement system according to claim 1, characterized in that: The mounting structure (321) further comprises a mounting seat (3214), wherein the mounting seat (3214) is connected to the second end of the hollow rod body (3211), and the seat body (31) comprises: Support seat (311); The floating seat (312) has a through hole and a mounting portion, the hollow rod body (3211) is inserted into the through hole, and the mounting seat (3214) is connected to the mounting portion via a fastener; A first guide rail assembly comprises a first guide rail and a first slider slidably arranged on the first guide rail, and the floating seat (312) is arranged on the first slider; A second guide rail assembly comprises a second guide rail and a second slider slidably arranged on the second guide rail, wherein the first guide rail is arranged on the second slider; An elastic structure (313), one end of the elastic structure (313) being connected to the support seat (311), and the other end of the elastic structure (313) being connected to the floating seat (312); Wherein, the extension directions of the first guide rail and the second guide rail are arranged at an angle.

5. The crankshaft hole measurement system according to claim 4, characterized in that: The detection element (322) is a contact displacement sensor; and / or, The elastic structure (313) is a tension spring; and / or, There are a plurality of the support structures (22), and the plurality of the support structures (22) are arranged at intervals along the length direction and / or the width direction of the base (21), and the positioning portion (23) is arranged on at least two of the support structures (22).

6. The crankshaft hole measurement system according to claim 4, characterized in that: There are two positioning parts (23), one positioning part (23) is a cylindrical pin shaft (231), and the other positioning part (23) is a polygonal pin shaft (232); the plurality of support structures (22) further include: A second supporting structure (222), the cylindrical pin shaft (231) being protrudingly arranged on the second supporting structure (222) so as to extend into the circular hole of the workpiece to be measured; A third supporting structure (223), wherein the polygonal pin shaft (232) is protrudingly arranged on the third supporting structure (223) so as to extend into the polygonal hole of the workpiece to be measured.

7. A method for calibrating the measurement level of a crankshaft hole measurement system, characterized in that: Applicable to the crankshaft hole measurement system according to any one of claims 1 to 6; the measurement level calibration method comprises: Step S1: calibrating a workpiece and obtaining an actual diameter value of a crankshaft hole of the calibrated workpiece; Step S2: Use the crankshaft hole measurement system to measure the inner diameter of the crankshaft hole of the calibration workpiece multiple times to obtain a measurement value y, and obtain a variable coefficient k and a compensation value △t according to the formula y=ke±△t and a fitting curve; wherein e is the extension or compression of the detection end of the crankshaft hole measurement system; Step S3: after calculating the variable coefficient k and the compensation value Δt, use the crankshaft hole measurement system to measure the inner diameter of the ring to be calibrated to obtain the measured inner diameter d; Step S4: classifying the crankshaft hole measurement system into measurement grades according to the grade standard and the measured inner diameter d; Among them, the grade standard includes grade A diameter range, grade B diameter range and grade C diameter range, the grade A diameter range is φ62.000~φ62.006mm, the grade B diameter range is φ62.007~φ62.012mm, and the grade C diameter range is φ62.013~φ62.019mm.

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