Piston trapezoidal ring groove pitch diameter measuring mechanism and measuring method thereof

Abstract

The invention discloses a piston trapezoidal ring groove pitch diameter measuring mechanism and a measuring method thereof. The measuring mechanism comprises a detection table and two oppositely arranged measuring mechanisms, a positioning part used for placing a piston to be measured is arranged between the two measuring mechanisms, the measuring mechanism comprises a measuring device, and the measuring device comprises a measuring needle assembly, a rotation driving assembly, a transverse movement driving assembly and a pneumatic inductance sensor. The measuring needle assembly comprises a measuring needle. The rotation driving assembly is connected with the measuring needle assembly, and the transverse movement driving assembly is connected with the rotation driving assembly. Through the synergistic effect of the transverse movement driving assembly and the rotation driving assembly, the measuring needle can accurately abut against the middle position of the piston trapezoidal ring groove, humanoid measurement action is achieved, the consistency of the measurement process is ensured, meanwhile, the pneumatic inductive sensor is used for obtaining the pitch diameter value of the piston trapezoidal ring groove, the accuracy of the measurement result is ensured, and the measurement accuracy is improved. Therefore, the influence of human factors on the measurement result is effectively reduced, and the reliability and repeatability of measurement are improved.

Description

Technical Field

[0001] The invention relates to the technical field of piston ring groove measurement, and in particular to a piston trapezoidal ring groove middle diameter measurement mechanism and a measurement method thereof. Background Art

[0002] The piston is an indispensable and important component in the engine and one of the core components for achieving power conversion and normal operation of the engine. The piston is designed with ring grooves, which usually include rectangular ring grooves and trapezoidal ring grooves. Among them, trapezoidal ring grooves are more widely used in practical applications due to their unique shape and function. With the continuous advancement of engine technology, higher requirements are placed on the measurement accuracy of piston ring grooves, especially in the measurement of trapezoidal ring grooves. Due to the complexity of its geometric shape and the need for precision, the measurement difficulty has increased significantly.

[0003] In the quality assessment of the trapezoidal ring groove of the piston, the M value (the median diameter of the trapezoidal ring groove) is an important parameter, which directly affects the matching effect between the piston and other parts in the engine. At present, in the prior art, the measurement of the M value is mainly carried out manually through mechanical measuring tools (such as micrometers). Since this measurement process relies on the experience and skills of the operator, improper operation will lead to measurement errors. For example, when measuring with a micrometer, if the applied pressure is uneven or the measuring angle is incorrect, it will affect the accuracy of the measured value. Secondly, the repeatability of manual measurement is poor. Even if the same operator performs multiple measurements at different times, the results may vary significantly due to factors such as operating methods and environmental changes. In addition, subjective judgment deviations are prone to occur when manually reading the measurement results, especially in the case of minor changes, and the possibility of misreading or omission is high.

[0004] Therefore, there is an urgent need to provide a piston trapezoidal ring groove middle diameter measuring mechanism with more accurate measurement results. Summary of the invention

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide a piston trapezoidal ring groove middle diameter measuring mechanism and a piston trapezoidal ring groove middle diameter measuring method using the piston trapezoidal ring groove middle diameter measuring mechanism.

[0006] The technical solution provided by the present invention is as follows: A piston trapezoidal ring groove mid-diameter measuring mechanism comprises a detection platform and two measuring mechanisms arranged opposite to each other, a positioning portion for placing a piston to be measured is arranged between the two measuring mechanisms, the measuring mechanism comprises a measuring device, and the measuring device comprises: A measuring needle assembly, comprising a measuring needle, wherein the measuring needle is used to abut against a middle position of a trapezoidal ring groove of a piston to be measured; A rotation drive assembly, connected to the measuring needle assembly, and used to drive the measuring needle assembly to rotate; A lateral drive assembly, connected to the rotation drive assembly, and used to drive the measuring needle assembly to move laterally toward or away from the piston to be measured; The pneumatic inductive sensor measures the median diameter of the trapezoidal ring groove of the piston to be measured when the measuring needle abuts against the middle position of the trapezoidal ring groove of the piston to be measured.

[0007] Furthermore, the measuring needle assembly also includes a measuring needle clamping member, and the measuring needle clamping member includes two clamping heads arranged opposite to each other, and the measuring needle is clamped between the two clamping heads.

[0008] Furthermore, the rotary drive assembly comprises: Bearings; A rotating shaft is inserted into the bearing and has a connecting hole at the center for connecting the measuring needle assembly; The bearing cover plate comprises a transverse side plate and a longitudinal side plate. The bearing is installed on the longitudinal side plate, and an up and down floating bearing shaft is installed on the transverse side plate.

[0009] Furthermore, the traverse drive assembly comprises: A sliding guide rail is arranged along the relative direction of the two measuring mechanisms; A slider, slidably mounted on the sliding guide rail; The driving member is arranged at the rear end of the sliding block and is used for driving the sliding block to slide on the sliding guide rail so as to drive the measuring needle assembly to approach or move away from the piston to be measured.

[0010] Furthermore, the positioning portion is provided with a positioning component, and the positioning component comprises: Two parallel slide rails, the slide rails are arranged along the relative directions of the two measuring mechanisms; A positioning plate, used for mounting the piston to be measured, and slidably mounted on the two slide rails; The positioning slide groove is arranged in parallel between the two slide rails, and a plurality of limiting holes are arranged along the length direction. The positioning plate is fastened to the positioning slide groove through the cooperation of the limiting member and the limiting holes.

[0011] Furthermore, the positioning assembly further comprises a positioning block, a plurality of positioning holes are provided on the positioning disk, and the positioning block is fastened to the positioning disk through the cooperation of the positioning piece and the positioning holes.

[0012] Furthermore, the two measuring mechanisms are respectively a first measuring mechanism and a second measuring mechanism, and the first measuring mechanism further comprises: An installation slide is arranged along the width direction of the detection table; A first column, slidably mounted on the mounting slot; A first measuring platform is vertically mounted on the first column and has an adjustable height, and the measuring device corresponding to the first measuring mechanism is mounted on the first measuring platform; A cylinder is connected to the first column and is used to drive the first column to slide along the mounting groove so that the measuring device corresponding to the first measuring mechanism forms a piston measuring position and a piston loading and unloading position relative to the detection platform.

[0013] Furthermore, the second measuring mechanism also includes a second column, which is fixedly mounted on a side of the detection platform opposite to the mounting slot, and the measuring device corresponding to the second measuring mechanism is vertically mounted on the second column and has an adjustable height.

[0014] On the other hand, the present invention provides a method for measuring the mid-diameter of a piston trapezoidal ring groove, using the piston trapezoidal ring groove mid-diameter measuring mechanism as described in any one of the above embodiments, and the measuring method comprises the following steps: Measurement of the middle diameter of the trapezoidal ring groove of the piston standard part: Place the piston standard part at the piston measurement position, adjust the lateral drive assembly and the rotation drive assembly so that the measuring needle abuts against the middle position of the trapezoidal ring groove of the piston standard part, and start the pneumatic inductive sensor to measure the middle diameter of the trapezoidal ring groove of the piston standard part; Measurement of the middle diameter of the trapezoidal ring groove of the piston to be measured: Place the piston to be measured at the piston measurement position, adjust the lateral drive assembly and the rotation drive assembly so that the measuring needle abuts against the middle position of the trapezoidal ring groove of the piston to be measured, and start the pneumatic inductive sensor to measure the middle diameter of the trapezoidal ring groove of the piston to be measured; Process benchmarking: Compare and analyze the mid-diameter value of the trapezoidal ring groove of the piston standard part with the mid-diameter value of the trapezoidal ring groove of the piston to be measured to determine the eligibility of the piston to be measured.

[0015] Furthermore, the step of measuring the mid-diameter value of the trapezoidal ring groove of the piston to be measured further includes: After the piston to be measured is placed at the piston measuring position, the cylinder is started to drive the first column to slide along the installation slide groove, so that the measuring device corresponding to the first measuring mechanism moves to the piston measuring position; After the measurement of the middle diameter of the trapezoidal ring groove of the piston to be measured is completed, the cylinder is started to drive the first column to slide along the installation slide groove, so that the measuring device corresponding to the first measuring mechanism moves to the piston loading and unloading position.

[0016] Compared with the prior art, the piston trapezoidal ring groove mid-diameter measuring mechanism provided by the embodiment of the present invention has at least the following technical effects: The piston trapezoidal ring groove middle diameter measuring mechanism includes a detection table and two measuring mechanisms arranged opposite to each other, and a positioning portion for placing the piston to be measured is arranged between the two measuring mechanisms. Each measuring mechanism includes a measuring device, and the measuring device includes a measuring needle assembly, a rotation drive assembly, a lateral drive assembly and a pneumatic inductive sensor. Specifically, the measuring needle assembly includes a measuring needle, and the measuring needle can abut against the middle position of the trapezoidal ring groove of the piston to be measured. The rotation drive assembly is connected to the measuring needle assembly and can drive the measuring needle assembly to rotate so that the measuring needle can accurately abut against the middle position of the trapezoidal ring groove of the piston to be measured. The lateral drive assembly is connected to the rotation drive assembly and can control the lateral movement of the measuring needle assembly so that the measuring needle assembly is laterally close to or away from the piston to be measured. When the measuring needle abuts against the middle position of the trapezoidal ring groove of the piston to be measured, the pneumatic inductive sensor measures the middle diameter value of the trapezoidal ring groove of the piston to be measured. Through the coordinated action of the transverse drive assembly and the rotary drive assembly, the measuring needle can accurately abut the middle position of the piston trapezoidal ring groove, realizing anthropomorphic measuring action and ensuring the consistency of the measurement process. At the same time, the pneumatic inductive sensor is used to obtain the middle diameter value of the piston trapezoidal ring groove, ensuring the accuracy of the measurement results, thereby effectively reducing the impact of human factors on the measurement results and improving the reliability and repeatability of the measurement.

[0017] The piston trapezoidal ring groove middle diameter measuring method uses the piston trapezoidal ring groove middle diameter measuring mechanism in the above-mentioned embodiment, and therefore has the technical effects possessed by the piston trapezoidal ring groove middle diameter measuring mechanism embodiment, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of a piston trapezoidal ring groove middle diameter measuring mechanism according to an embodiment of the present invention; Figure 2 It is a schematic diagram of the overall structure of a measuring mechanism in one embodiment of the present invention; Figure 3 for Figure 2 Schematic diagram of the local structure; Figure 4 It is a schematic flow chart of a method for measuring the middle diameter of a trapezoidal ring groove of a piston according to an embodiment of the present invention; Figure 5 for Figure 4 Schematic diagram of the process of step S20.

[0020] Reference numerals: 1. Inspection table; 2. Measuring mechanism; 21. Measuring device; 211. Measuring needle assembly; 2111. Measuring needle; 2112. Measuring needle clamp; 2121. Bearing; 2122. Rotating shaft; 2123. Bearing cover plate; 2124. Connecting hole; 2125. Up and down floating bearing shaft; 2131. Sliding guide rail; 2132. Sliding block; 2133. Driving member; 214. Pneumatic inductive sensor; 22. Mounting slide; 23. First column; 24. First measuring platform; 25. Second column; 26. Column screw rod; 27. Guide rod; 28. Locking member; 31. Slide rail; 32. Positioning plate; 33. Positioning slide; 34. Positioning block; 4. Piston to be measured. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0023] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0025] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0026] Please refer to the attached Figure 1 To Attachment Figure 3 As shown, an embodiment of the present invention provides a piston trapezoidal ring groove middle diameter measuring mechanism 2, the measuring mechanism 2 comprises a detection platform 1 and two measuring mechanisms 2 arranged opposite to each other, a positioning portion for placing a piston 4 to be measured is arranged between the two measuring mechanisms 2, the measuring mechanism 2 comprises a measuring device 21, the measuring device 21 comprises a measuring needle assembly 211, a rotation drive assembly, a lateral drive assembly and a pneumatic inductive sensor 214. It can be explained that the trapezoidal ring groove refers to the piston ring groove having a trapezoidal structure.

[0027] Specifically, the measuring needle assembly 211 includes a measuring needle 2111, which is replaceable and used to abut against the middle position of the trapezoidal ring groove of the piston 4 to be measured; the diameter specification of the measuring needle 2111 is adapted to the specification of the trapezoidal ring groove of the piston 4 to be measured. Different models and specifications of the piston 4 to be measured can be replaced with measuring needles 2111 of different diameters, so that the measuring needle 2111 can just abut against the middle position of the trapezoidal ring groove of the piston 4 to be measured.

[0028] The rotary drive assembly is connected to the measuring needle assembly 211, and is used to drive the measuring needle assembly 211 to rotate, so that the measuring needle 2111 can accurately abut against the middle position of the trapezoidal ring groove of the piston 4 to be measured. The lateral drive assembly is connected to the rotary drive assembly, and is used to drive the measuring needle assembly 211 to move laterally closer to or farther away from the piston 4 to be measured; when the measuring needle 2111 abuts against the middle position of the trapezoidal ring groove of the piston 4 to be measured, the pneumatic inductive sensor 214 measures the middle diameter value of the trapezoidal ring groove of the piston 4 to be measured. Among them, the pneumatic inductive sensor 214 is an imported pneumatic pen-type inductive sensor with a measuring range of 10mm and a displacement resolution of 0.1um, which can meet the detection requirements. The pneumatic inductive sensor 214 adopts the IPAM-2505 digital input relay output module based on the RS-485 bus interface, and controls the solenoid valve through the relay output to realize the drive of the pneumatic inductive sensor 214. The pneumatic inductive sensor 214 is equipped with a dedicated RS232 serial port processing module, which supports a maximum baud rate of 115200 bit / s, ensuring fast and stable data transmission. The pneumatic sensor directly collects data through a computer, which is convenient for real-time monitoring and analysis.

[0029] The piston trapezoidal ring groove middle diameter measuring mechanism 2 of the present embodiment includes a detection table 1 and two measuring mechanisms 2 arranged opposite to each other, and a positioning portion for placing the piston 4 to be measured is arranged between the two measuring mechanisms 2. Each measuring mechanism 2 includes a measuring device 21, and the measuring device 21 includes a measuring needle assembly 211, a rotation drive assembly, a lateral drive assembly and a pneumatic inductance sensor 214. Specifically, the measuring needle assembly 211 includes a measuring needle 2111, and the measuring needle 2111 can abut against the middle position of the trapezoidal ring groove of the piston 4 to be measured. The rotation drive assembly is connected to the measuring needle assembly 211, and can drive the measuring needle assembly 211 to rotate so that the measuring needle 2111 can accurately abut against the middle position of the trapezoidal ring groove of the piston 4 to be measured. The lateral drive assembly is connected to the rotation drive assembly, and can control the lateral movement of the measuring needle assembly 211, so that the measuring needle assembly 211 is laterally close to or away from the piston 4 to be measured. When the measuring needle 2111 of the pneumatic inductive sensor 214 abuts against the middle position of the trapezoidal ring groove of the piston 4 to be measured, the middle diameter value of the trapezoidal ring groove of the piston 4 to be measured is measured. Through the coordinated action of the lateral drive component and the rotation drive component, the measuring needle 2111 can accurately abut against the middle position of the trapezoidal ring groove of the piston, realizing a humanized measurement action, ensuring the consistency of the measurement process, and at the same time, the pneumatic inductive sensor 214 is used to obtain the middle diameter value of the trapezoidal ring groove of the piston, ensuring the accuracy of the measurement result, thereby effectively reducing the influence of human factors on the measurement result and improving the reliability and repeatability of the measurement.

[0030] In some optional embodiments, the measuring needle assembly 211 also includes a measuring needle clamp 2112, and the measuring needle clamp 2112 includes two clamping heads arranged opposite to each other, and the measuring needle 2111 is clamped between the two clamping heads. Fasteners are provided on both clamping heads, and the installation and removal of the measuring needle 2111 can be achieved by the fasteners. The fasteners can be, but are not limited to, bolts. The measuring needle assembly 211 also includes a mounting seat for mounting the measuring needle clamp 2112, and the measuring needle clamp 2112 can be, but is not limited to, clamped on the mounting seat by a clamping method.

[0031] In some optional embodiments, the rotary drive assembly includes a bearing 2121, a rotary shaft 2122, and a bearing cover plate 2123. The rotary shaft 2122 is inserted into the bearing 2121, and a connecting hole 2124 for connecting the measuring needle assembly 211 is provided in the center. Specifically, a connecting member (such as a screw, etc.) is sequentially inserted into the mounting seat and the connecting hole 2124 so that the measuring needle assembly 211 is fastened and installed on the rotary drive assembly, and the rotation of the rotary shaft 2122 can drive the measuring needle assembly 211 to rotate. The bearing cover plate 2123 includes a transverse side plate and a longitudinal side plate, the longitudinal side plate is installed with a bearing 2121, and the transverse side plate is installed with an up-and-down floating receiving shaft 2125. Specifically, the transverse side plate is symmetrically installed with an up-and-down floating receiving shaft 2125 on both sides of the rotary shaft 2122. Under the drive of the rotary drive assembly, the measuring needle assembly 211 can rotate, and at the same time, the up-and-down floating receiving shaft 2125 guides the measuring needle assembly 211 to float up and down, thereby realizing human-like movements. This design ensures that the measuring needle 2111 of the measuring needle assembly 211 can accurately abut against the middle position of the trapezoidal ring groove of the piston 4 to be measured, thereby improving the accuracy of the measurement. During manual measurement, it is generally necessary to manually move up and down and swing left and right to allow the measuring needle 2111 to smoothly enter the trapezoidal ring groove, and the measuring mechanism 2 is provided with a rotating drive assembly and an up and down floating bearing shaft 2125, precisely to achieve the up and down movement and left and right swing during manual measurement.

[0032] In some optional embodiments, the transverse driving assembly includes a sliding rail 2131, a slider 2132 and a driving member 2133. The sliding rail 2131 is arranged along the relative direction of the two measuring mechanisms 2; the slider 2132 is slidably mounted on the sliding rail 2131; the driving member 2133 is arranged at the rear end of the slider 2132, and is used to drive the slider 2132 to slide on the sliding rail 2131 to drive the measuring needle assembly 211 to approach or move away from the piston 4 to be measured, wherein the driving member 2133 is a micro cylinder, and the micro cylinder drives the slider 2132 to drive the measuring needle assembly 211 to approach or move away from the piston 4 to be measured. The micro cylinder adopts the IPAM-2505 digital quantity input relay output module based on the RS-485 bus interface, and controls the solenoid valve through the relay output to realize the driving of the micro cylinder. After the measuring needle assembly 211 approaches the middle position of the trapezoidal ring groove of the piston 4 to be measured, the slider 2132 is locked on the sliding rail 2131 by the locking nut.

[0033] In some optional embodiments, the positioning part is provided with a positioning assembly, which includes two parallel slide rails 31, a positioning plate 32 and a positioning slot 33. The two parallel slide rails 31 are arranged along the relative direction of the two measuring mechanisms 2; the positioning plate 32 is used to install the piston 4 to be measured, and is slidably installed on the two slide rails 31; the positioning slot 33 is arranged in parallel between the two slide rails 31, and is provided with a plurality of limiting holes along the length direction, and the positioning plate 32 is fastened to the positioning slot 33 through the cooperation of the limiting member and the limiting hole. The setting of the positioning slot 33 is intended to control the sliding distance of the positioning plate 32 on the slide rail 31 to adapt to different models and specifications of the piston 4 to be measured. The limiting hole is designed as a screw hole, and the sliding distance of the positioning plate 32 can be flexibly adjusted by cooperating with the connection between the limiting member (such as a screw) and the screw hole. Specifically, the user can select a suitable screw hole position according to different piston sizes, so as to ensure that the piston 4 to be measured on the positioning plate 32 can accurately slide to the piston measurement position.

[0034] In some optional embodiments, the positioning assembly further includes a positioning block 34, which is used to fix the stop plate, and the outer wall of the piston 4 to be measured can abut against the side wall of the stop plate. The positioning plate 32 is provided with a plurality of positioning holes, and the positioning block 34 is fastened to the positioning plate 32 through the cooperation of the positioning member and the positioning hole. The positioning member can be connected to the positioning holes at different positions, so that stop plates of different models and specifications can be flexibly installed on the positioning plate 32. Specifically, the positioning hole is a screw hole, and the positioning member is a screw adapted to the screw hole.

[0035] In some optional embodiments, the two measuring mechanisms 2 are respectively a first measuring mechanism and a second measuring mechanism. Figure 2As shown, the first measuring mechanism includes, in addition to the measuring device 21 of the above-mentioned embodiment, a mounting slot 22, a first column 23, a first measuring platform 24 and a cylinder. The mounting slot 22 is arranged along the width direction of the detection platform 1; the first column 23 is slidably mounted on the mounting slot 22; the first measuring platform 24 is vertically mounted on the first column 23, and the height is adjustable, and the measuring device 21 corresponding to the first measuring mechanism is mounted on the first measuring platform 24; the cylinder is connected to the first column 23, and is used to drive the first column 23 to slide along the mounting slot 22, so that the measuring device 21 corresponding to the first measuring mechanism forms a piston measuring position and a piston loading and unloading position relative to the detection platform 1. It should be further explained that the first measuring mechanism also includes a column screw 26, a guide rod 27 and a locking member 28. The first measuring platform 24 can achieve height adjustment through the column screw 26. The guide rod 27 is arranged in parallel with the column screw 26, and plays a guiding role in the up and down movement of the first measuring platform 24. The locking member 28 allows the first measuring platform 24 to be locked to the first column 23 after adjusting to the target height. Specifically, the locking member 28 includes a locking knob, and the first column 23 is provided with a long hole bar along its height direction. The locking knob can lock the first measuring platform 24 into the long hole bar of the first column 23. The cylinder adopts the IPAM-2505 digital input relay output module based on the RS-485 bus interface, and controls the solenoid valve through the relay output to realize the drive of the cylinder. The piston loading and unloading position can refer to the cylinder driving the first column 23 and the measuring device 21 corresponding to the first measuring mechanism to slide to the edge position of the detection table 1 to facilitate the loading and unloading of the piston.

[0036] It should be further explained that the first measuring mechanism also includes a column screw 26, a guide rod 27 and a locking member 28. These components work together to enable the first measuring platform 24 to achieve a height-adjustable function. Specifically, the column screw 26 is used to adjust the height of the first measuring platform 24, and the guide rod 27 is arranged in parallel with the column screw 26. During the up and down movement of the first measuring platform 24, the guide rod 27 plays a guiding role to ensure that the platform remains stable during lifting and is not prone to shaking or offset. After reaching the target height, the locking member 28 is used to firmly lock the first measuring platform 24 on the first column 23 to ensure stability during the measurement process. Specifically, the locking member 28 includes a locking knob, and a long hole bar is designed in the height direction of the first column 23. The user can fix the first measuring platform 24 in an appropriate position in the long hole bar by rotating the locking knob, thereby achieving a locking effect.

[0037] In some optional embodiments, the second measuring mechanism further includes a second column 25, which is fixedly mounted on the side of the inspection platform 1 opposite to the mounting slot 22, and the measuring device 21 corresponding to the second measuring mechanism is vertically mounted on the second column 25, and the height is adjustable. Among them, the second measuring mechanism may also include a second measuring platform, which is vertically mounted on the second column 25, and the height is adjustable (refer to the height-adjustable structure of the first measuring platform 24, which will not be described in detail here), and the measuring device 21 corresponding to the second measuring mechanism is mounted on the second measuring platform.

[0038] On the other hand, please see the attached Figure 4 As shown, an embodiment of the present invention provides a method for measuring the middle diameter of a piston trapezoidal ring groove. The method uses the piston trapezoidal ring groove middle diameter measuring mechanism of any one of the above embodiments. The method comprises the following steps: S10: Measurement of the middle diameter of the trapezoidal ring groove of the piston standard part: Place the piston standard part at the piston measurement position, adjust the lateral drive assembly and the rotary drive assembly so that the measuring needle abuts against the middle position of the trapezoidal ring groove of the piston standard part, and start the pneumatic inductive sensor to measure the middle diameter of the trapezoidal ring groove of the piston standard part; S20: Measuring the middle diameter of the trapezoidal ring groove of the piston to be measured: placing the piston to be measured at the piston measurement position, adjusting the lateral drive assembly and the rotation drive assembly so that the measuring needle abuts against the middle position of the trapezoidal ring groove of the piston to be measured, and starting the pneumatic inductive sensor to measure the middle diameter of the trapezoidal ring groove of the piston to be measured; S30: Process benchmarking: Compare and analyze the mid-diameter value of the trapezoidal ring groove of the piston standard part with the mid-diameter value of the trapezoidal ring groove of the piston to be measured to determine the eligibility of the piston to be measured.

[0039] Since the measuring method uses the piston trapezoidal ring groove middle diameter measuring mechanism of any one of the above-mentioned embodiments, it has the technical effects possessed by the piston trapezoidal ring groove middle diameter measuring mechanism embodiments, which will not be described in detail here.

[0040] In some optional embodiments, the step S20 of measuring the mid-diameter value of the trapezoidal ring groove of the piston to be measured further includes: After the piston to be measured is placed at the piston measuring position, the cylinder is started to drive the first column to slide along the installation slide groove, so that the measuring device corresponding to the first measuring mechanism moves to the piston measuring position; After the measurement of the middle diameter of the trapezoidal ring groove of the piston to be measured is completed, the cylinder is started to drive the first column to slide along the installation slide groove, so that the measuring device corresponding to the first measuring mechanism moves to the piston loading and unloading position.

[0041] Specifically, the step S20 of measuring the mid-diameter value of the trapezoidal ring groove of the piston to be measured includes the following steps: S201: placing the piston to be measured at the piston measurement position; S202: Start the cylinder to drive the first column to slide along the installation groove, so that the measuring device corresponding to the first measuring mechanism moves horizontally to the piston measuring position; S203: Start the column screw to move the measuring device corresponding to the first measuring mechanism longitudinally to the piston measuring position; S204: adjusting the lateral drive assembly and the rotation drive assembly respectively corresponding to the first measuring mechanism and the second measuring mechanism, so that the measuring needles respectively corresponding to the first measuring mechanism and the second measuring mechanism abut against two sides of the middle position of the trapezoidal ring groove of the piston to be measured; S205: starting the pneumatic inductance sensors corresponding to the first measuring mechanism and the second measuring mechanism respectively to measure the middle diameter value of the trapezoidal ring groove of the piston to be measured; S206: Start the cylinder to drive the first column to slide along the installation groove, so that the measuring device corresponding to the first measuring mechanism moves horizontally to the piston loading and unloading position.

[0042] It should be specifically noted that the specific steps for measuring the mid-diameter value of the trapezoidal ring groove of the piston standard part can refer to the mid-diameter value measuring steps S201 to S206 of the trapezoidal ring groove of the piston to be measured, and will not be described in detail here.

[0043] In addition, an embodiment of the present invention provides a measurement system applicable to the piston trapezoidal ring groove middle diameter measurement method in the above embodiment, and the measurement system includes a parameter input module, a process benchmarking module, and a measurement result output module. Specifically, the parameter input module is used to input relevant parameters of the piston standard part and the piston to be measured, and the process benchmarking module includes a measurement data acquisition module, a measurement data storage module, a measurement data analysis module, and a measurement data judgment module. In some optional embodiments, the measurement system also includes an SPC (statistical process control) analysis module.

[0044] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A piston trapezoidal ring groove mid-diameter measuring mechanism, characterized in that: The invention comprises a detection platform and two measuring mechanisms arranged opposite to each other, a positioning part for placing a piston to be measured is arranged between the two measuring mechanisms, and the measuring mechanism comprises a measuring device, and the measuring device comprises: A measuring needle assembly, comprising a measuring needle, wherein the measuring needle is used to abut against a middle position of a trapezoidal ring groove of a piston to be measured; A rotation drive assembly, connected to the measuring needle assembly, and used to drive the measuring needle assembly to rotate; A lateral drive assembly, connected to the rotation drive assembly, and used to drive the measuring needle assembly to move laterally toward or away from the piston to be measured; The pneumatic inductive sensor measures the median diameter of the trapezoidal ring groove of the piston to be measured when the measuring needle abuts against the middle position of the trapezoidal ring groove of the piston to be measured.

2. The piston trapezoidal ring groove mid-diameter measuring mechanism according to claim 1, characterized in that: The measuring needle assembly also includes a measuring needle clamping piece, which includes two clamping heads arranged opposite to each other, and the measuring needle is clamped between the two clamping heads.

3. The piston trapezoidal ring groove mid-diameter measuring mechanism according to claim 1, characterized in that: The rotary drive assembly comprises: Bearings; A rotating shaft is inserted into the bearing and has a connecting hole at the center for connecting the measuring needle assembly; The bearing cover plate comprises a transverse side plate and a longitudinal side plate. The bearing is installed on the longitudinal side plate, and an up and down floating bearing shaft is installed on the transverse side plate.

4. The piston trapezoidal ring groove mid-diameter measuring mechanism according to claim 1, characterized in that: The traverse drive assembly comprises: A sliding guide rail is arranged along the relative direction of the two measuring mechanisms; A slider, slidably mounted on the sliding guide rail; The driving member is arranged at the rear end of the sliding block and is used for driving the sliding block to slide on the sliding guide rail so as to drive the measuring needle assembly to approach or move away from the piston to be measured.

5. The piston trapezoidal ring groove mid-diameter measuring mechanism according to claim 1, characterized in that: The positioning portion is provided with a positioning component, and the positioning component comprises: Two parallel slide rails, the slide rails are arranged along the relative directions of the two measuring mechanisms; A positioning plate, used for mounting the piston to be measured, and slidably mounted on the two slide rails; The positioning slide groove is arranged in parallel between the two slide rails, and a plurality of limiting holes are arranged along the length direction. The positioning plate is fastened to the positioning slide groove through the cooperation of the limiting member and the limiting holes.

6. The piston trapezoidal ring groove mid-diameter measuring mechanism according to claim 5, characterized in that: The positioning assembly further comprises a positioning stopper, and a plurality of positioning holes are arranged on the positioning disk. The positioning stopper is fastened to the positioning disk through the cooperation between the positioning piece and the positioning holes.

7. The piston trapezoidal ring groove mid-diameter measuring mechanism according to claim 1, characterized in that: The two measuring mechanisms are respectively a first measuring mechanism and a second measuring mechanism, and the first measuring mechanism further comprises: An installation slide is arranged along the width direction of the detection table; A first column, slidably mounted on the mounting slot; A first measuring platform is vertically mounted on the first column and has an adjustable height, and the measuring device corresponding to the first measuring mechanism is mounted on the first measuring platform; A cylinder is connected to the first column and is used to drive the first column to slide along the mounting groove so that the measuring device corresponding to the first measuring mechanism forms a piston measuring position and a piston loading and unloading position relative to the detection platform.

8. The piston trapezoidal ring groove mid-diameter measuring mechanism according to claim 7, characterized in that: The second measuring mechanism also includes a second column, which is fixedly mounted on a side of the detection platform opposite to the mounting slot, and the measuring device corresponding to the second measuring mechanism is vertically mounted on the second column and is height-adjustable.

9. A method for measuring the mid-diameter of a piston trapezoidal ring groove, characterized in that: The piston trapezoidal ring groove mid-diameter measuring mechanism according to any one of claims 1 to 8 is used, and the measuring method comprises the following steps: Measurement of the middle diameter of the trapezoidal ring groove of the piston standard part: Place the piston standard part at the piston measurement position, adjust the lateral drive assembly and the rotation drive assembly so that the measuring needle abuts against the middle position of the trapezoidal ring groove of the piston standard part, and start the pneumatic inductive sensor to measure the middle diameter of the trapezoidal ring groove of the piston standard part; Measurement of the middle diameter of the trapezoidal ring groove of the piston to be measured: Place the piston to be measured at the piston measurement position, adjust the lateral drive assembly and the rotation drive assembly so that the measuring needle abuts against the middle position of the trapezoidal ring groove of the piston to be measured, and start the pneumatic inductive sensor to measure the middle diameter of the trapezoidal ring groove of the piston to be measured; Process benchmarking: Compare and analyze the mid-diameter value of the trapezoidal ring groove of the piston standard part with the mid-diameter value of the trapezoidal ring groove of the piston to be measured to determine the eligibility of the piston to be measured.

10. The method for measuring the mid-diameter of a piston trapezoidal ring groove according to claim 9, characterized in that: The step of measuring the mid-diameter value of the trapezoidal ring groove of the piston to be measured also includes: After the piston to be measured is placed at the piston measuring position, the cylinder is started to drive the first column to slide along the installation slide groove, so that the measuring device corresponding to the first measuring mechanism moves to the piston measuring position; After the measurement of the middle diameter of the trapezoidal ring groove of the piston to be measured is completed, the cylinder is started to drive the first column to slide along the installation slide groove, so that the measuring device corresponding to the first measuring mechanism moves to the piston loading and unloading position.

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