A device and method for detecting the diameter of a circle based on the go-no go end technique

Abstract

The application discloses a device and method for detecting the diameter size of a circle based on a through-end technology, comprising a tool handle, a through-end detection sample plate and a dead-end detection sample plate; the tool handle which can be installed in the main shaft of a machine tool has a central shaft, and the through-end detection sample plate is circumferentially and rotationally connected to the central shaft; the outer convex arc surface of the through-end detection sample plate is a through-end detection surface, and the outer convex arc surface of the dead-end detection sample plate is a dead-end detection surface; an inner cavity with a cavity opening is formed through the through-end detection surface, and the dead-end detection sample plate is slidably fitted in the inner cavity to form a composite detection sample plate structure capable of sliding and switching the through end and the dead end. The through-end detection sample plate and the dead-end detection sample plate are combined into the composite detection sample plate structure capable of sliding and switching the through end and the dead end, the through end and the dead end can be switched freely, and the detection efficiency can be improved while the cost is greatly reduced.

Description

Technical Field

[0001] This invention belongs to the field of workpiece diameter detection technology, and particularly relates to a device and method for detecting the diameter of a circle based on go / no-go end technology. Background Technology

[0002] As the division of labor in the modern manufacturing industry becomes increasingly refined, corresponding inspection methods also need to evolve in order to rationally allocate processing resources, improve product quality and efficiency, and reduce processing costs. In actual manufacturing processes, the precision inspection of parts smaller than 1 / 2 circle often employs coordinate measuring machines (CMMs) or online inspection functions integrated into high-end machine tools, which cannot simultaneously meet the requirements of low cost and high efficiency.

[0003] In coordinate measuring machine (CMM) inspection, the product needs to be unloaded and mounted onto the CMM for inspection. This method cannot guarantee the product's accuracy, and the inspection and processing costs are high. While processing on high-end machine tools with inspection capabilities can guarantee accuracy and shorten processing time, the rates of high-end machine tools are several times higher than those of ordinary machine tools, making it impossible to reduce the product's processing costs. Summary of the Invention

[0004] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a device and method for detecting the diameter of a circle based on the go-no-go end technology. The go-go end detection template and the no-go end detection template are combined to form a composite detection template structure that can slide and switch between the go-go and no-go ends. The go-go and no-go end detections can be switched freely, which can improve the detection efficiency while significantly reducing the cost.

[0005] Technical Solution: To achieve the above objectives, the present invention provides a device for detecting the diameter of a circle based on go / no-go end technology, comprising a tool holder, a go end detection template, and a no-go end detection template; the tool holder, which can be installed into a machine tool spindle, has a central shaft, and the go end detection template is circumferentially rotatably connected to the central shaft; the convex arc surface of the go end detection template is the go end detection surface, and the convex arc surface of the no-go end detection template is the no-go end detection surface; an inner cavity with an opening is formed through the go end detection surface, and the no-go end detection template slides and adapts within the inner cavity, forming a composite detection template structure capable of sliding and switching between go and no-go ends.

[0006] Furthermore, the composite detection template structure capable of sliding and switching between the through and stop ends includes a through end detection structure and a stop end detection structure.

[0007] The through-end detection structure is such that the stop-end detection template slides relative to the through-end detection template until the stop-end detection surface is hidden inside the inner cavity of the through-end detection template;

[0008] The stop-end detection structure is configured such that the stop-end detection template slides to the point where the stop-end detection surface slides out of the cavity opening and exposes the outside of the inner cavity of the through-end detection template;

[0009] The switching between the through-end detection structure and the stop-end detection structure is achieved by the sliding of the stop-end detection template relative to the through-end detection template.

[0010] Furthermore, the end of the stop detection plate that extends into the inner cavity is provided with a plug. The plug and the bottom of the inner cavity form a gas chamber with variable pressure through inflation and deflation. The stop detection plate is driven to perform sliding movement according to the gas pressure change inside the gas chamber.

[0011] Furthermore, an inner limiting block is provided inside the air cavity, and the stop end detection plate is blocked and limited by the inner limiting block when sliding into the inner cavity; the plate surface of the through end detection plate has a guide opening from the cavity opening along the sliding direction of the stop end detection plate, and an outer limiting block is provided on the guide opening. An extension portion extending outward through the guide opening is connected to the stop end detection plate, and the stop end detection plate is limited by the extension portion against the outer limiting block when sliding outward from the inner cavity.

[0012] Furthermore, it includes a pressure sensor spring, which is disposed in a mounting groove opened on the outer limit stop. The pressure sensor spring is partially extended out of the groove towards the extension, and when the stop end detection plate slides outward from the inner cavity, the extension compresses the pressure sensor spring until the pressure sensor spring is compressed into the mounting groove, and the extension abuts against the outer limit stop.

[0013] Furthermore, the through end detection template has a collar, and the through end detection template is rotatably connected to the central shaft through the collar. The collar is provided with retaining rings and screws installed on the central shaft on both axial sides for axial limiting.

[0014] Furthermore, it includes a rotary drive unit corresponding to the through end detection template; the drive end of the rotary drive unit is connected to a gear, and the collar is provided with partial teeth that mesh with the gear; the rotary drive unit drives the through end detection template through gear transmission, so that the composite detection template structure that can slide and switch through and stop ends rotates, and performs through and stop end tests on the inner circular wall of the workpiece.

[0015] Furthermore, it includes a speed sensor, which is positioned in an orientation toward the gear or a portion of the gear teeth.

[0016] A detection method for a device based on go / no-go end technology to detect the diameter of a circle includes the following steps:

[0017] Step S1: Install the tool holder of the testing device into the machine tool spindle;

[0018] Step S2: Position the machine tool at the center of the workpiece to be inspected;

[0019] Step S3: Adjust the composite test template structure to the pass-through test structure shape, and then drive it to rotate by the rotation drive unit to check whether it can pass;

[0020] Step S4: Adjust the composite test template structure to the stop end test structure shape, drive it to rotate by the rotation drive unit, and check whether it fails;

[0021] Step S5: Workpieces that meet the inspection requirements of the go gauge (go) and no-go gauge (no-go) are qualified products.

[0022] Beneficial effects: The beneficial effects of this invention are as follows:

[0023] 1) The go end test template and the no end test template are combined to form a composite test template structure that can slide and switch between go and no end. The go and no end tests can be switched freely, which can improve the test efficiency while significantly reducing the cost.

[0024] 2) It can perform online real-time measurement, improving processing accuracy and efficiency, and reducing rework rate;

[0025] 3) Simple structure, good stability, and easy to use;

[0026] 4) Significantly reduces processing costs and has strong applicability and wide application range. Attached Figure Description

[0027] Appendix Figure 1 This is a schematic diagram of a structure of one embodiment of the present invention for detecting the diameter of a workpiece circle;

[0028] Appendix Figure 2 This is a schematic diagram of the detection device of the present invention. Figure 1 ;

[0029] Appendix Figure 3 This is a schematic diagram of the detection device of the present invention. Figure 2 ;

[0030] Appendix Figure 4 This is a schematic diagram of the cross-section of the end-test template. Detailed Implementation

[0031] The invention will now be further described with reference to the accompanying drawings.

[0032] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 and appendix Figure 4As shown, the present invention discloses a device for detecting the diameter of a circle based on go / no-go end technology, comprising a tool holder 2, a go-end detection template 3, and a no-go end detection template 4; the tool holder 2, which can be installed into a machine tool spindle, has a central shaft 6, and the go-end detection template 3 is circumferentially rotatably connected to the central shaft 6; the convex arc surface of the go-end detection template 3 is the go-end detection surface 3a, and the convex arc surface of the no-go end detection template 4 is the no-go end detection surface 4a; an inner cavity 30 with an opening 31 is formed through the go-end detection surface 3a, and the no-go end detection template 4 is slidably adapted in the inner cavity 30 to form a composite detection template structure capable of sliding and switching between go and no-go ends.

[0033] More specifically, the composite detection template structure capable of sliding and switching between the through and stop ends includes a through end detection structure and a stop end detection structure.

[0034] The through-end detection structure is such that the stop-end detection template 4 slides relative to the through-end detection template 3 so that the stop-end detection surface 4a is hidden inside the inner cavity 30 of the through-end detection template 3.

[0035] The stop end detection structure is configured such that the stop end detection template 4 slides to the point where the stop end detection surface 4a slides out of the cavity opening 31 and exposes the outside of the inner cavity 30 of the through end detection template 3;

[0036] The through-end detection structure and the stop-end detection structure are switched by sliding the stop-end detection template 4 relative to the through-end detection template 3.

[0037] Therefore, in this invention, the through end detection template 3 and the no-end detection template 4 are combined to form a composite detection template structure that can slide and switch between through and no-end detection. The switching between through and no-end detection is seamless, which improves detection efficiency and significantly reduces costs compared to existing technologies. Furthermore, the through and no-end detections are switchable, eliminating the need to replace the detection template after the through end detection is completed during the testing process. Simply switch the through end detection function to the no-end detection function. Therefore, the entire through and no-end testing process saves a significant amount of time and is highly efficient.

[0038] As attached Figure 2 and attached Figure 4As shown, the end of the stop detection plate 4 that extends into the inner cavity 30 is provided with a plug 7. The plug 7 and the bottom of the inner cavity 30 form a gas chamber 30b with variable pressure achieved by filling and deflating the gas. The stop detection plate 4 is pneumatically driven to perform sliding operation according to the pressure change inside the gas chamber 30b. An inner limiting block 15 is provided in the gas chamber 30b. When the stop detection plate 4 slides into the inner cavity 30, it is blocked and limited by the inner limiting block 15. The surface of the through detection plate 3 has a guide port 32 from the cavity opening 31 along the sliding direction of the stop detection plate 4. An outer limiting block 13 is provided on the guide port 32. An extension 8 is connected to the stop detection plate 4 and extends outward through the guide port 32. When the stop detection plate 4 slides outward from the inner cavity 30, it is limited by the extension 8 against the outer limiting block 13. Considering the high dimensional accuracy requirements when performing end-sliding detection by sliding the end-sliding test template 4, the sliding distance of the end-sliding test template 4 must be precise. The existing push-drive or screw-drive methods have relatively large errors. Therefore, this invention takes into account the precise position of the comprehensive limit and uses air drive to provide sliding driving force for the end-sliding test template. The air drive and the limit of the sliding of the end-sliding test template 4 are combined to improve accuracy.

[0039] More specifically, the through-end testing sample 3 is provided with an air interface, which connects to the air chamber 30b and is connected to an air valve 20. The air valve 20 is connected to an air pump through an air pipe. The air chamber 30b is also equipped with an air pressure sensor 21 for detecting air pressure.

[0040] This invention includes a pressure sensor spring disposed within a mounting groove on an outer limiting stop 13. The pressure sensor spring extends partially out of the groove towards the extension portion 8. When the stop end detection plate 4 slides outward from the inner cavity 30, the extension portion 8 compresses the pressure sensor spring until it is compressed into the mounting groove, and the extension portion 8 abuts against the outer limiting stop 13. The pressure sensor spring is used to detect whether the pneumatic sliding of the stop end detection plate 4 is complete. If a fault occurs, it can be detected promptly, preventing unexpected detection. Under normal circumstances, the pressure sensor spring is pushed and compressed into the mounting groove by the extension portion 8 each time, so its stable pressure detection value is constant. When insufficient pneumatic drive causes the stop end detection plate 4 to not slide out completely, the pressure sensor spring will not be fully pressed into the mounting groove, thus its pressure detection value will decrease, indicating a fault, and timely repair is necessary.

[0041] The through end detection template 3 has a collar 9, and the through end detection template 3 is rotatably connected to the central shaft 6 through the collar 9. The two axial sides of the collar 9 are respectively provided with a retaining ring 14 and a screw 12 installed on the central shaft 6 for axial limiting.

[0042] This invention includes a rotary drive unit 23 corresponding to the through-end detection template 3, preferably a servo motor, which is mounted on a base plate 22 on a central shaft 6. The drive end of the rotary drive unit 23 is connected to a gear 24, and a collar 9 has partial teeth 11 that mesh with the gear 24. The rotary drive unit 23 drives the through-end detection template 3 via gear transmission, causing the composite detection template structure, capable of sliding and switching between through and stop ends, to rotate and perform through and stop end tests on the inner circular wall 10 of the workpiece 1. A speed sensor 25 is included, which is positioned facing the gear 24 or the partial teeth 11. The speed sensor 25 is mounted on the base plate 22 via a matching mounting bracket. Besides visual observation, in this invention, the speed sensor 25 allows for direct and intuitive detection of whether the through-end test is passed and whether the stop end test is failed. In this embodiment, the workpiece 1 is the pump casing of a vacuum pump, and the inner circular wall 10 is the pump cavity wall of this pump casing.

[0043] A detection method for a device based on go / no-go end technology to detect the diameter of a circle includes the following steps:

[0044] Step S1: Install the tool holder 2 of the detection device into the machine tool spindle;

[0045] Step S2: Position the machine tool at the center of the workpiece 1 to be inspected;

[0046] Step S3: Adjust the composite test template structure to the pass-through test structure shape, and then drive it to rotate through the rotation drive unit 23 to check whether it can pass;

[0047] Step S4: Adjust the composite test template structure to the stop end test structure shape, drive it to rotate by the rotation drive unit 23, and check whether it fails;

[0048] Step S5: Workpiece 1 that meets the inspection requirements of the go gauge (go) and no-go gauge (no-go) is a qualified product.

[0049] The advantages of this invention are as follows:

[0050] 1) The go end test template and the no end test template are combined to form a composite test template structure that can slide and switch between go and no end. The go and no end tests can be switched freely, which can improve the test efficiency while significantly reducing the cost.

[0051] 2) It can perform online real-time measurement, improving processing accuracy and efficiency, and reducing rework rate;

[0052] 3) Simple structure, good stability, and easy to use;

[0053] 4) Significantly reduces processing costs and has strong applicability and wide application range.

[0054] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for detecting the diameter of a circle based on go / no-go end technology, characterized in that: The device includes a tool holder (2), a through end detection template (3), and a stop end detection template (4). The tool holder (2), which can be installed in the machine tool spindle, has a central shaft (6). The through end detection template (3) is circumferentially rotated and connected to the central shaft (6). The convex arc surface of the through end detection template (3) is the through end detection surface (3a), and the convex arc surface of the stop end detection template (4) is the stop end detection surface (4a). An inner cavity (30) with a cavity opening (31) is formed through the through end detection surface (3a). The stop end detection template (4) slides and adapts to the inner cavity (30), forming a composite detection template structure that can slide and switch between through and stop ends. The composite detection template structure capable of sliding and switching between the through and stop ends includes a through end detection structure and a stop end detection structure. The through-end detection structure is such that the stop-end detection template (4) slides relative to the through-end detection template (3) so that the stop-end detection surface (4a) is hidden inside the inner cavity (30) of the through-end detection template (3); The stop detection structure is such that the stop detection template (4) slides to the point where the stop detection surface (4a) slides out of the cavity (31) and exposes the outside of the inner cavity (30) of the through detection template (3); The through-end detection structure and the stop-end detection structure are switched by the sliding of the stop-end detection template (4) relative to the through-end detection template (3); The end of the stop detection plate (4) that extends into the inner cavity (30) is provided with a plug (7). The plug (7) and the bottom of the inner cavity (30) are limited to form an air chamber (30b) that can achieve variable air pressure by filling and deflating air. The stop detection plate (4) is driven to perform sliding operation according to the air pressure change inside the air chamber (30b). An inner limiting stop (15) is provided inside the air cavity (30b). When the stop end detection plate (4) slides into the inner cavity (30), it is blocked and limited by the inner limiting stop (15). The plate surface of the through end detection plate (3) is provided with a guide port (32) from the cavity opening (31) along the sliding direction of the stop end detection plate (4). An outer limiting stop (13) is provided on the guide port (32). An extension (8) that extends outward through the guide port (32) is connected to the stop end detection plate (4). When the stop end detection plate (4) slides outward from the inner cavity (30), it is limited by the extension (8) against the outer limiting stop (13).

2. The device for detecting the diameter of a circle based on go / no-go end technology according to claim 1, characterized in that: Includes a pressure sensor spring, which is disposed in a mounting groove opened on the outer limit stop (13). The pressure sensor spring is partially extended out of the groove towards the extension (8). When the stop end detection plate (4) slides outward from the inner cavity (30), the extension (8) compresses the pressure sensor spring until the pressure sensor spring is compressed into the mounting groove, and the extension (8) abuts against the outer limit stop (13).

3. The device for detecting the diameter of a circle based on go / no-go end technology according to claim 1, characterized in that: The through end detection template (3) has a collar (9), and the through end detection template (3) is rotatably connected to the central shaft (6) through the collar (9). The collar (9) is provided with a retaining ring (14) and a screw (12) installed on the central shaft (6) on its two axial sides for axial limiting.

4. The device for detecting the diameter of a circle based on go / no-go end technology according to claim 3, characterized in that: It includes a rotary drive unit (23) corresponding to the through end detection template (3); the drive end of the rotary drive unit (23) is connected to a gear (24), and the collar (9) is provided with a partial tooth (11) that meshes with the gear (24); the rotary drive unit (23) drives the through end detection template (3) through gear transmission, so that the composite detection template structure that can slide and switch through and stop ends rotates, and performs through and stop end tests on the inner circular wall (10) of the workpiece (1).

5. The device for detecting the diameter of a circle based on go / no-go end technology according to claim 4, characterized in that: Includes a speed sensor (25) which is positioned toward the gear (24) or a partial tooth (11).

6. A detection method based on the device for detecting the diameter of a circle using the go / no-go end technology described in claim 5, characterized in that: The specific steps are as follows: Step S1: Insert the tool holder (2) of the detection device into the machine tool spindle; Step S2: Position the machine tool at the center of the workpiece (1) to be inspected; Step S3: Adjust the composite test template structure to the pass-through test structure shape, and then drive it to rotate through the rotation drive unit (23) to check whether it can pass; Step S4: Adjust the composite test template structure to the stop end test structure shape, drive it to rotate by the rotation drive unit (23), and check whether it cannot pass; Step S5: Workpieces (1) that meet the inspection requirements of the go gauge (go) and no-go gauge (no-go) are qualified products.

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