Device and method for rapidly measuring sphere diameter of incomplete inner spherical surface

Abstract

The invention discloses a device and a method for rapidly measuring the sphere diameter of an incomplete inner spherical surface, which are used for rapidly measuring the incomplete spherical surface of a part and ensuring the stable processing quality of the part, an installation sleeve, a measuring head, an ejector pin, an induction rod and a fixed seat are adopted, the measuring head, the ejector pin and the induction rod are sequentially installed in the installation sleeve, and then a spring is arranged on the fixed seat; after the mounting sleeve is fixedly connected with the fixed seat, a to-be-measured sliding shoe is placed on the measuring head, the inner spherical surface of the to-be-measured sliding shoe is enabled to be in contact with the measuring head, then the to-be-measured sliding shoe is pressed to be in contact with the positioning part at the upper end of the mounting sleeve, the measuring head sensor on the measuring head can acquire the spherical surface section data of the to-be-measured sliding shoe at the moment, and the acquired data are exported and analyzed. The measuring tool is simple in structure, the measuring data of the inner spherical surface of the piston shoe of the motor can be quickly obtained by adopting the measuring head sensor, the problems that the inner spherical surface of the piston shoe is not easy to measure and the coloring inspection efficiency is low are solved, and the measuring tool is simple, convenient and reliable to operate and suitable for machining and measuring similar parts.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical parts processing technology and process equipment thereof, and is mainly used for rapid and precise measurement of the inner spherical diameter size of parts such as plunger pumps and motor shoes, and specifically relates to a device and method for rapid measurement of the diameter of an incomplete inner spherical surface. Background Art

[0002] In modern manufacturing industry, the inner sphere is the key part of many important parts, such as parts in the fields of automobile, aerospace, shipbuilding, machinery, etc. The size and shape accuracy of the inner sphere of these parts have a vital impact on the overall performance and service life of the product. By measuring the inner sphere, it can be ensured that the size and shape of the part meet the design requirements, thereby ensuring the quality and reliability of the product.

[0003] The measurement of the inner spherical surface can also provide an important basis for the optimization of the production process. By accurately measuring the inner spherical surface, we can understand the source and distribution of errors in the production process, and then adjust and improve the production process to improve production efficiency and product quality. For example, in mechanical processing, by measuring the size and shape accuracy of the inner spherical surface, we can adjust the processing parameters of the machine tool, such as cutting speed, feed rate, etc., to obtain better processing results.

[0004] The motor shoe is located at the end of the plunger and is in close contact with the inner wall of the cylinder. It is an important connecting component between the plunger and the cylinder in the hydraulic motor, and plays a supporting, guiding and sealing role. The accuracy of the inner spherical surface of the motor shoe directly affects the working conditions of the plunger and the cylinder in the hydraulic motor. Therefore, it is generally necessary to measure the inner spherical surface of the motor shoe. At present, the measurement of the inner spherical surface generally adopts the measurement and coloring method. The inner spherical surface of the shoe has high accuracy requirements, short ball diameter, and large number of processing per batch. At present, the three-coordinate measurement requires scanning or sampling the surface of the part, which is inefficient and cannot guarantee 100% measurement. The special spherical coloring gauge is a grouping gauge, which requires the operator to color it manually. The human factor has a greater impact, the measurement result is unstable, and the actual measured value cannot be accurately measured. In mass production, these two methods cannot meet the requirements of fast and precise measurement of the inner spherical surface size of parts. Summary of the invention

[0005] The purpose of the present invention is to provide a device and method for quickly measuring the diameter of an incomplete inner spherical surface, so as to overcome the problems of poor measurement accuracy and low efficiency in the prior art for measuring the inner spherical surface of a motor shoe.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A device for quickly measuring the diameter of an incomplete inner spherical surface comprises a mounting sleeve, a probe, an ejector pin, a sensing rod and a fixing seat. Both the mounting sleeve and the fixing seat are of a through structure. The mounting sleeve and the fixing seat are coaxially fixedly connected. The ejector pin and the sensing rod are coaxially nested in the mounting sleeve. The probe sleeve is arranged outside the ejector pin. A spring is arranged between the bottom of the probe and the bottom of the fixing seat. Two probe sensors are symmetrically arranged on both sides of the upper end of the probe. The probe sensors on both sides of the upper end of the probe can contact the inner spherical surface of the sliding shoe to be measured, and the upper end of the ejector pin contacts the inside of the probe.

[0007] Preferably, a stop block is provided at the upper end of the mounting sleeve, and the stop block is fixed to the upper end of the mounting sleeve by a first screw.

[0008] Preferably, the outer sleeve of the ejector pin is provided with a valve core, the valve core is arranged between the spring and the probe, the valve core is a stepped shaft structure, the lower end of the probe is sleeved on the valve core, an external boss is arranged on the valve core, the lower end of the probe contacts the outer surface of the external boss on the valve core, and the bottom of the valve core can contact the upper surface of the spring.

[0009] Preferably, a core sleeve is provided on the outer side of the valve core, and the core sleeve is a hollow structure. The probe is nested in the core sleeve, and probe openings are provided on both sides of the upper end of the core sleeve. The probe sensor on the probe contacts the inner spherical surface of the slipper to be measured through the probe opening on the core sleeve for measurement.

[0010] Preferably, a threaded hole is provided on the side wall of the core sleeve, and an adjustment screw for fixing the valve core is arranged in the threaded hole.

[0011] Preferably, a bushing is nested inside the valve core, and the bushing is nested outside the sensing rod.

[0012] Preferably, an ejector pin sensing probe is provided between the sensing rod and the ejector pin.

[0013] Preferably, a mounting base is provided at the lower end of the fixing seat, and the mounting base is fastened to the mounting base by a second screw.

[0014] A method for quickly measuring the diameter of an incomplete inner spherical surface based on the above-mentioned device for quickly measuring the diameter of an incomplete inner spherical surface comprises the following steps: The standard parts of the tested skid are used to calibrate and calibrate the installed incomplete inner spherical surface ball diameter rapid measurement device; The measured slipper is placed on the probe and brought into contact with the positioning portion at the upper end of the mounting sleeve, and the chord length of the measured slipper is obtained through the side head, and at the same time, the height of the probe at the measuring position is obtained; based on the obtained chord length of the measured slipper, the height of the probe at the measuring position, the height of the calibrated probe at the reference position and the chord length of the measured slipper, the change in the radius of the inner spherical surface of the measured slipper relative to the inner spherical surface of the standard part of the measured slipper can be calculated, and the inner spherical surface size of the measured slipper can be obtained.

[0015] Preferably, it is known that the inner spherical radius of the standard part of the tested sliding shoe is , set the height of the probe at the reference position for The chord length 2b on the measured shoe is directly obtained by the probe sensor on the probe, and the height of the probe at the measuring position is for , the height of the probe at the measuring position It can be directly measured, and the radius of the inner spherical surface of the measured shoe can be obtained by final calculation .

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention provides a device for quickly measuring the diameter of an incomplete inner spherical surface, which is used to realize the rapid measurement of the incomplete spherical surface of a part and ensure the stable processing quality of the part. The device adopts a mounting sleeve, a probe, an ejector pin, a sensing rod and a fixing seat. Two probe sensors are symmetrically arranged on both sides of the upper end of the probe. The probe sensors on both sides of the upper end of the probe can contact the inner spherical surface of the sliding shoe to be measured, and the upper end of the ejector pin contacts the inside of the probe. When in use, the probe, the ejector pin and the sensing rod are sequentially installed in the mounting sleeve, and then a spring is arranged on the fixing seat. After the mounting sleeve is fixedly connected to the fixing seat, , and then place the slipper to be measured on the probe so that the inner spherical surface of the slipper to be measured is in contact with the probe, and then press the slipper to be measured to make it contact with the positioning part at the upper end of the mounting sleeve. At this time, the probe sensor on the probe can obtain the cross-sectional data of the spherical surface of the slipper to be measured, and export the obtained data for analysis. The present application has a simple structure and uses a probe sensor to quickly obtain the measurement data of the inner spherical surface of the motor slipper, which solves the problem that the inner spherical surface of the slipper is difficult to measure and the efficiency of coloring inspection is low. The measurement tooling is simple, convenient and reliable to operate and is suitable for the processing and measurement of similar parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the state structure of a device for quickly measuring the diameter of a non-complete inner sphere in an embodiment of the present invention.

[0018] Figure 2 It is a schematic diagram of the three-dimensional exploded structure of the device for quickly measuring the diameter of a non-complete inner sphere in an embodiment of the present invention.

[0019] Figure 3 Schematic diagram of the principle structure of rapid measurement of the diameter of a non-complete inner sphere in an embodiment of the present invention.

[0020] In the figure, 1 is the sliding shoe to be tested; 2 is the stop block; 3 is the first screw; 4 is the mounting sleeve; 5 is the core sleeve; 6 is the measuring head; 7 is the ejector pin; 8 is the valve core; 9 is the ejector sensing probe; 10 is the sensing rod; 11 is the bushing; 12 is the fixed base; 13 is the adjusting screw; 14 is the spring; 15 is the second screw; 16 is the mounting base; 17 is the supporting rod. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. 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 this field without creative work should fall within the scope of protection of the present invention.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention 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 data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0023] like Figure 1As shown, the present invention provides a device for quickly measuring the diameter of an incomplete inner spherical surface, which is used to quickly measure the incomplete spherical surface of a part and ensure the stable processing quality of the part. The device specifically comprises a mounting sleeve 4, a probe 6, an ejector pin 7, a sensing rod 10 and a fixing seat 12. The mounting sleeve 4 and the fixing seat 12 are both through structures. The mounting sleeve 4 and the fixing seat 12 are coaxially fixedly connected. The ejector pin 7 and the sensing rod 10 are coaxially nested in the mounting sleeve 4. The probe 6 is sleeved on the outside of the ejector pin 7. A spring 14 is provided between the bottom of the probe 6 and the inner bottom of the fixing seat 12. Two probe sensors are symmetrically provided on both sides of the upper end of the probe 6. The probe sensors on both sides of the upper end of the probe 6 can contact the inner spherical surface of the sliding shoe 1 to be measured. The upper end of the ejector pin 7 contacts the inside of the probe 6. When in use, , install the probe 6, the ejector pin 7, and the sensing rod 10 into the mounting sleeve 4 in sequence, then set a spring on the fixing seat 12, and after the mounting sleeve 4 is fixedly connected to the fixing seat 12, place the skid 1 to be measured on the probe 6, so that the inner spherical surface of the skid 1 to be measured is in contact with the probe 6, and then press the skid 1 to be measured to make it contact with the positioning part at the upper end of the mounting sleeve 4. At this time, the probe sensor on the probe 6 can obtain the spherical cross-sectional data of the skid 1 to be measured, and the obtained data can be exported and analyzed. The structure of the present application is simple, and the probe sensor can quickly obtain the measurement data of the inner spherical surface of the motor skid, which solves the problem that the inner spherical surface of the skid is difficult to measure and the coloring inspection efficiency is low. The measurement tooling is simple, convenient and reliable to operate, and is suitable for the processing and measurement of similar parts.

[0024] Specifically, in the specific implementation manner of the present application, a stop block 2 is provided at the upper end of the mounting sleeve 4, which serves as a contact portion for pressing and positioning the slipper 1 to be tested. The stop block 2 is fixed to the upper end of the mounting sleeve 4 by a first screw 3. Stop blocks 2 of different sizes can be replaced according to different models of the slipper 1 to be tested. The structure is simple and inconvenient and quick.

[0025] In the specific implementation of the present application, the outer sleeve of the ejector pin 7 is provided with a valve core 8, which is arranged between the spring 14 and the probe 6. The valve core 8 is a stepped shaft structure, and the lower end of the probe 6 is sleeved on the valve core 8. The valve core 8 is provided with an outer boss, and the lower end of the probe 6 contacts the outer surface of the outer boss on the valve core 8. The bottom of the valve core 8 can contact the upper surface of the spring 14. When the inner spherical surface of the tested sliding shoe 1 contacts the surface of the probe 6 and is pressed downward, the valve core 8 can be forced to squeeze the spring 14. After use, the probe 6 can be restored to its initial position under the action of the spring 14. The present application adopts the valve core 8 as the outer sleeve structure of the ejector pin 7, which can increase the linear motion accuracy of the ejector pin 7.

[0026] In another embodiment of the present application, in order to prevent the probe 6 and the valve core 8 from falling along the other end of the mounting sleeve 4, a core sleeve 5 is provided on the outer side of the valve core 8. The core sleeve 5 is a hollow structure. The probe 6 is nested in the core sleeve 5. Probe openings are provided on both sides of the upper end of the core sleeve 5. The probe sensor on the probe 6 contacts the inner spherical surface of the slipper 1 to be measured through the probe opening on the core sleeve 5 for measurement.

[0027] The probe openings opened on both sides of the upper end of the core sleeve 5 can limit the upper end of the probe 6.

[0028] A detachable stop block 2 is provided at the upper end of the mounting sleeve 4, and the upper end of the core sleeve 5 can contact with the inner bottom of the stop block 2, thereby preventing the core sleeve 5 from falling along the other end of the mounting sleeve 4, and under the action of the spring 14, the probe 6 is in a compressed state in the initial state, and the upper end of the probe 6 is against the bottom of the stop block 2 through the core sleeve 5. When measurement is required, the slipper 1 to be measured is placed on the probe 6 so that the inner spherical surface of the slipper 1 to be measured is in contact with the probe 6, and then the slipper 1 to be measured is pressed to make it contact with the upper end of the stop block 2 at the upper end of the mounting sleeve 4. At this time, the probe sensor on the probe 6 can obtain the spherical cross-section data of the slipper 1 to be measured, and after the measurement is completed, the probe 6 returns to its original position along with the core sleeve 5 under the action of the spring 4.

[0029] In a specific embodiment of the present application, a threaded hole is opened on the side wall of the core sleeve 5, and an adjusting screw 13 is arranged in the threaded hole. The valve core 8 nested therein is fixed by the adjusting screw 3, so that the core sleeve 5 and the valve core 8 are an integrated structure. When the measured slipper 1 is used to press the probe 6, the valve core 8 and the core sleeve 5 can move synchronously to prevent friction between the two, thereby improving the service life of the overall measuring structure.

[0030] In a specific embodiment of the present application, a bushing 11 is nested inside the valve core 8, and the bushing 11 is nested outside the sensing rod 10. The bushing 11 is arranged between the sensing rod 10 and the valve core 8. During the measurement process, the wear of the sensing rod 10 is reduced and the service life of the sensing rod 10 is increased.

[0031] In a specific embodiment of the present application, an ejector sensing probe 9 is provided between the sensing rod 10 and the ejector 7 for measuring the moving position of the ejector 7, so as to obtain the moving dimension of the tested sliding shoe 1 during measurement.

[0032] In order to improve the stability of the overall equipment measurement, a mounting base 16 is provided at the lower end of the fixed base 12. The mounting base 16 is fastened to the mounting base 12 by a second screw 15. A plurality of support rods 17 are provided at the lower end of the mounting base 12 to form a stable support structure at the bottom of the mounting base 12.

[0033] The probe sensors and the ejector pin sensing probe 9 on the sensing rod 10 provided on both sides of the upper end of the probe 6 are connected to the data acquisition device, and the ejector pin sensing probe 9 on the sensing rod 10 is used to collect the movement of the probe 6; the spherical chord length data obtained by the probe sensor at the upper end of the probe 6 is obtained by the data acquisition device, and the ball diameter value of the ball inside the measured slipper can be quickly obtained.

[0034] The method for measuring the inner spherical surface of a sliding shoe based on the above-mentioned device for quickly measuring the diameter of an incomplete inner spherical surface specifically comprises the following steps: The standard part of the tested shoe is used to calibrate and calibrate the installed incomplete inner spherical surface ball diameter rapid measurement device. The standard part is used to press the installed incomplete inner spherical surface ball diameter rapid measurement device so that the standard part contacts the positioning part at the upper end of the installation sleeve 4. At this time, the probe 6 is located at the reference position. The data obtained by the two probe sensors on the probe is the standard chord length 2a on the standard part. The height of the probe 6 at the reference position is set to ; Then, the measured shoe is placed on the probe 6 and is brought into contact with the positioning portion at the upper end of the mounting sleeve 4. At this time, the chord length 2b on the measured shoe is obtained through the side head 6, and the height of the probe 6 at the measuring position can also be obtained. According to the obtained standard chord length 2a, the height of the probe 6 at the reference position is , the chord length 2b on the measured shoe and the height of the probe 6 The change in the radius of the inner spherical surface of the tested shoe relative to the inner spherical surface of the standard part of the tested shoe can be calculated, and the size of the inner spherical surface of the tested shoe can be obtained.

[0035] During the use of this application, two standard parts of the upper and lower limits of the measured shoe are used to calibrate and calibrate the installed incomplete inner spherical surface ball diameter rapid measurement device; the standard chord length 2a on the calibrated standard part and the height of the probe 6 at the reference position are All are known numbers.

[0036] like Figure 3 As shown, the inner spherical radius of the standard part of the tested sliding shoe is , set the height of the probe 6 at the reference position for The chord length 2b on the measured shoe is directly obtained by the probe sensor on the probe 6. The height of the probe 6 at the measuring position is for , the height of the probe 6 at the measuring position It can be directly measured, and the radius of the inner spherical surface of the measured shoe can be obtained by final calculation .

[0037] The present invention proposes a method for rapid measurement of the ball diameter of an incomplete inner spherical surface, which is simple to operate, accurate in measurement, and fast in speed. It can meet the requirements of rapid measurement of parts in trial and batch production, and ensure the stable processing quality of parts. The probe is used to measure and collect the required position point dimensions of the inner spherical surface of the sliding shoe, and the ball diameter dimension of the inner spherical surface of the sliding shoe to be measured can be obtained through the measurement data, and the ball diameter value can be directly read through the electronic column display device. The device for rapid measurement of the ball diameter of an incomplete inner spherical surface adopts the comparison method for measurement, and the inspection fixture is designed to accurately measure the cross-sectional dimensions of the inner spherical surface at the height position, and the ball diameter value is obtained through function calculation. It is calibrated and calibrated with two standard parts of the upper and lower limits of the measured ball diameter size. The inner spherical surface diameter measurement system of the present invention uses standard parts for repeated measurement, and the repeated measurement accuracy is no more than 0.003mm, and the difference compared with the detection and comparison of the three-coordinate measuring machine is no more than the spherical profile tolerance. This measurement method and its special device can accurately and quickly measure the inner spherical diameter, replacing the metrology and coloring inspection methods. It has high measurement accuracy and ensures stable part processing quality, meeting the measurement requirements of mass part production.

Claims

1. A device for quickly measuring the diameter of an incomplete inner sphere, characterized in that: The invention comprises a mounting sleeve (4), a probe (6), an ejector pin (7), a sensing rod (10) and a fixing seat (12); the mounting sleeve (4) and the fixing seat (12) are both of a through-hole structure; the mounting sleeve (4) and the fixing seat (12) are coaxially fixedly connected; the ejector pin (7) and the sensing rod (10) are coaxially nested and arranged in the mounting sleeve (4); the probe (6) is sleeved on the outside of the ejector pin (7); a spring (14) is arranged between the bottom of the probe (6) and the inner bottom of the fixing seat (12); two probe sensors are symmetrically arranged on both sides of the upper end of the probe (6); the probe sensors on both sides of the upper end of the probe (6) can contact the inner spherical surface of the sliding shoe (1) to be measured; and the upper end of the ejector pin (7) contacts the inside of the probe (6).

2. According to claim 1, a device for quickly measuring the diameter of a non-complete inner sphere, characterized in that: A stop block (2) is provided at the upper end of the mounting sleeve (4), and the stop block (2) is fixed to the upper end of the mounting sleeve (4) by a first screw (3).

3. The device for quickly measuring the diameter of a non-complete inner sphere according to claim 1, characterized in that: The outer sleeve of the ejector pin (7) is provided with a valve core (8), the valve core (8) is arranged between the spring (14) and the probe (6), the valve core (8) is a stepped shaft structure, the lower end of the probe (6) is sleeved on the valve core (8), an external boss is arranged on the valve core (8), the lower end of the probe (6) contacts the outer surface of the external boss on the valve core (8), and the bottom of the valve core (8) can contact the upper surface of the spring (14).

4. The device for quickly measuring the diameter of a non-complete inner sphere according to claim 1, characterized in that: The outer sleeve of the valve core (8) is provided with a core sleeve (5), the core sleeve (5) is a hollow structure, the probe (6) is nested in the core sleeve (5), and probe openings are provided on both sides of the upper end of the core sleeve (5). The probe sensor on the probe (6) contacts the inner spherical surface of the sliding shoe (1) to be measured through the probe opening on the core sleeve (5) to perform measurement.

5. The device for quickly measuring the diameter of a non-complete inner sphere according to claim 1, characterized in that: A threaded hole is provided on the side wall of the core sleeve (5), and an adjustment screw (13) for fixing the valve core (8) is arranged in the threaded hole.

6. The device for quickly measuring the diameter of a non-complete inner sphere according to claim 1, characterized in that: A bushing (11) is nested inside the valve core (8), and the bushing (11) is nested outside the sensing rod (10).

7. The device for quickly measuring the diameter of an incomplete inner sphere according to claim 1, characterized in that: An ejector pin sensing probe (9) is provided between the sensing rod (10) and the ejector pin (7).

8. The device for quickly measuring the diameter of a non-complete inner sphere according to claim 1, characterized in that: A mounting base (16) is provided at the lower end of the fixing seat (12), and the mounting base (16) is fastened to the mounting base (12) by a second screw (15).

9. A method for quickly measuring the diameter of an incomplete inner sphere based on the device for quickly measuring the diameter of an incomplete inner sphere according to claim 1, characterized in that: The following steps are involved: The standard parts of the tested skid are used to calibrate and calibrate the installed incomplete inner spherical surface ball diameter rapid measurement device; The measured slipper is placed on the probe and brought into contact with the positioning portion at the upper end of the mounting sleeve, and the chord length of the measured slipper is obtained through the side head, and at the same time, the height of the probe at the measuring position is obtained; based on the obtained chord length of the measured slipper, the height of the probe at the measuring position, the height of the calibrated probe at the reference position and the chord length of the measured slipper, the change in the radius of the inner spherical surface of the measured slipper relative to the inner spherical surface of the standard part of the measured slipper can be calculated, and the inner spherical surface size of the measured slipper can be obtained.

10. The method for rapid measurement of the diameter of an incomplete inner sphere according to claim 9, characterized in that: It is known that the inner spherical radius of the standard part of the tested sliding shoe is , set the height of the probe at the reference position for The chord length 2b on the measured shoe is directly obtained by the probe sensor on the probe, and the height of the probe at the measuring position is for , the height of the probe at the measuring position It can be directly measured, and the radius of the inner spherical surface of the measured shoe can be obtained by final calculation .

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