A detection system and method for detecting the passability of a cylindrical product through a caliber

Abstract

This invention provides a bore fitting detection system and method, belonging to the field of product quality inspection technology. The system includes a bore fitting gauge assembly and a product propulsion device. The bore fitting gauge assembly includes a bore fitting gauge body with a preset inner diameter. The product propulsion device includes a frame, a synchronous belt drive mechanism, multiple support blocks, and a clamping device. The synchronous belt drive mechanism drives the multiple support blocks and the clamping device to move synchronously, allowing the cylindrical product to stably enter the bore fitting gauge body axially under multi-point support. The system then judges whether the outer envelope dimensions meet the bore fitting requirements based on the product's passage status. After the inspection is completed, the clamping device holds the tail end of the cylindrical product, and the synchronous belt drive mechanism reverses its direction, causing the cylindrical product to exit the bore fitting gauge body and return to its starting position. This invention has a reasonable structure, stable operation, and can improve inspection efficiency and consistency while reducing equipment maintenance difficulty.

Description

Technical Field

[0001] This invention belongs to the field of product quality inspection technology, specifically relating to an inspection system and method for detecting the passability of cylindrical products in the bore, and more particularly to a bore detection system and method that uses a synchronous belt to drive multiple support blocks to move synchronously, so as to stably push the cylindrical product into the bore of the bore gauge for inspection. Background Technology

[0002] Before processing, assembly, or use, cylindrical products typically require inspection of their straightness, coaxiality, or overall passability to determine if they meet subsequent assembly or usage requirements. Existing inspection methods commonly include contact testing using dial indicators, positioning shafts, or non-contact testing equipment such as optical or electromagnetic induction sensors. Some methods also utilize automated inspection equipment to collect runout data during the cylindrical product's rotation and further analyze its form and position errors.

[0003] While the aforementioned detection methods can perform shape and position detection of cylindrical products to a certain extent, they still have shortcomings. Contact detection methods typically rely on manual clamping, alignment, and reading, making the process cumbersome and inefficient, and unsuitable for batch or continuous testing. Non-contact detection methods and intelligent detection equipment usually require numerous sensors, measurement modules, and data processing units, resulting in relatively complex equipment structures and control logic. They also have high requirements for the operating environment, installation accuracy, and maintenance conditions. In industrial environments with dust, vibration, or limited space, their stability and applicability are easily affected.

[0004] Furthermore, when cylindrical products are pushed into the testing fixture using existing testing equipment, relative sliding, rolling, or posture shifts can easily occur between the product and the supporting components. This leads to instability in the axial posture of the product as it enters the testing fixture, thus affecting the reliability of the testing process. If a single-point or few-point support method is used to push longer cylindrical products, problems such as product sagging, swaying, or uneven force may also occur, further reducing testing efficiency and consistency.

[0005] Therefore, there is an urgent need for a relatively simple structure, easy maintenance, and stable support and synchronous propulsion system for cylindrical products to improve the automation, efficiency and operational stability of cylindrical product passability testing. Summary of the Invention

[0006] In view of this, the purpose of this invention is to provide a bore engagement detection system and method to solve the problems of low efficiency of manual operation, unstable product propulsion posture, complex equipment structure, and high maintenance difficulty in the existing cylindrical product passability detection process. To achieve the above objective, this invention provides the following technical solution: In existing cylindrical product cavity-closing detection technologies, single-point support or fixed support propulsion methods are typically used to move the cylindrical product along the detection cavity. These methods are prone to sagging, rolling, or attitude shifts during propulsion, leading to poor detection consistency. Furthermore, they require manual operation or complex sensor systems to improve stability, resulting in low detection efficiency and automation levels. In contrast, this invention uses a synchronous belt to drive multiple support blocks and clamping devices to move synchronously, ensuring the cylindrical product remains in a multi-point supported state throughout the propulsion process and maintains no relative slippage with the support blocks. This significantly improves the stability of the product's propulsion attitude and the accuracy of cavity-closing detection, while achieving highly automated and continuous detection. This solves the problem of existing technologies being unable to simultaneously achieve stability, efficiency, and ease of operation.

[0007] A bore fitting detection system includes: a bore fitting gauge assembly, comprising a bore fitting gauge body with a preset inner diameter; a product pushing device, disposed on one side of the bore fitting gauge assembly, for pushing a cylindrical product into the bore fitting gauge body along the axial direction of the bore fitting gauge body; the product pushing device includes a frame, a synchronous belt drive mechanism, multiple support blocks, and a clamping device; the synchronous belt drive mechanism is disposed on the frame, the multiple support blocks and the clamping device are all connected to the synchronous belt drive mechanism and can move synchronously under the drive of the synchronous belt drive mechanism; the multiple support blocks are used to provide multi-point support for the cylindrical product during the cylindrical product pushing process and move synchronously with the cylindrical product; the clamping device is used to clamp the tail end of the cylindrical product when the cylindrical product exits the bore fitting gauge body; wherein, the external envelope size of the cylindrical product is determined by the passing state of the cylindrical product into the bore fitting gauge body to determine whether the bore fitting requirements are met.

[0008] In one possible implementation, the plurality of support blocks are spaced apart along the axial direction of the cylindrical product, and include at least a first support block for supporting the front part of the cylindrical product, a second support block for supporting the middle part of the cylindrical product, and a third support block for supporting the rear part of the cylindrical product.

[0009] In one possible implementation, the synchronous belt drive mechanism includes a synchronous belt, a pulley, a servo motor, and a reducer. The servo motor drives the pulley to rotate via the reducer, thereby driving the synchronous belt to run in a cycle.

[0010] In one possible implementation, the timing belt has a straight running section located above the frame, and the plurality of support blocks support the cylindrical product on the straight running section and move forward synchronously with the cylindrical product; the length of the straight running section is not less than the maximum propulsion stroke required for the cylindrical product to enter the bore of the fitting gauge.

[0011] In one possible implementation, the support block is fixed to the timing belt and can rotate back around the pulley with the timing belt to achieve cyclic conveying of the support block.

[0012] In one possible implementation, the support block includes a support block base, on which an arc-shaped support groove for supporting a cylindrical product is provided, and an elastic protective layer for elastic contact with the cylindrical product is provided on the arc-shaped support groove; rollers are respectively provided on both sides of the support block base for rolling support of the support block when the support block moves with the timing belt, so as to improve the stability of the support block's movement.

[0013] In one possible implementation, guide rollers are provided at both ends of the arc-shaped support groove to guide the cylindrical product when it is placed in the arc-shaped support groove.

[0014] In one possible implementation, the clamping device includes a slider seat, two grippers mounted on the slider seat, and two cylinders that drive the two grippers to move respectively; the two grippers are arranged opposite to each other and can clamp or release the tail end of the cylindrical product under the synchronous drive of the two cylinders.

[0015] In one possible implementation, a control system is also included, comprising a first proximity switch disposed at the starting position of the cylindrical product and a second proximity switch disposed at the detection termination position of the cylindrical product; the control system controls the synchronous belt drive mechanism to start and stop according to the detection signals of the first proximity switch and the second proximity switch, and controls the clamping device to clamp or release the cylindrical product.

[0016] In one possible implementation, during the advancement of the cylindrical product, the plurality of support blocks move synchronously with the cylindrical product to maintain a state of no relative sliding or substantially no relative sliding between the cylindrical product and the support blocks.

[0017] In one possible implementation, the clamping device further includes a pusher block disposed between or in front of the two jaws, for pushing the tail end of the cylindrical product toward the bore of the fitting gauge body when the jaws are in the released state.

[0018] In one possible implementation, a connecting rod is provided between the bore gauge assembly and the product propulsion device to maintain the relative position stability between the bore gauge body and the cylindrical product propulsion path.

[0019] The present invention also provides a method for bore detection using the above-mentioned bore detection system, comprising: placing a cylindrical product on multiple support blocks; detecting whether the cylindrical product is in the starting position; when the cylindrical product is in the starting position, controlling the synchronous belt drive mechanism to drive the multiple support blocks and clamping device to move forward synchronously, so that the cylindrical product enters the bore of the bore gauge along the axial direction; during the advancement process, the support blocks and the cylindrical product move synchronously to maintain no relative sliding between the cylindrical product and the support blocks; judging whether the outer envelope size of the cylindrical product meets the bore detection requirements based on the passing state of the cylindrical product entering the bore gauge; when the cylindrical product reaches the detection termination position, controlling the clamping device to clamp the tail end of the cylindrical product, and controlling the synchronous belt drive mechanism to run in reverse, so that the cylindrical product exits the bore gauge and returns to the starting position.

[0020] Based on the above technical solution, the bore detection system and method of the present invention drive multiple support blocks and clamping devices to move synchronously through a synchronous belt drive mechanism, so that the cylindrical product is always in a multi-point support state during the advancement process, and enters the bore of the bore smoothly and continuously along the axial direction of the bore, thereby reducing the sagging, shaking, deviation and relative sliding between the cylindrical product and the support components during the advancement process, and improving the posture stability and detection consistency of the cylindrical product when entering the bore of the bore.

[0021] Meanwhile, this invention utilizes the passing state of a cylindrical product entering the bore of the fitting gauge to determine whether the outer envelope dimensions of the cylindrical product meet the fitting requirements. This allows for product passability testing in a relatively simple and intuitive mechanical inspection method, avoiding the problems of complex structure, cumbersome debugging, and high maintenance costs associated with using complex sensor systems or high-precision measuring equipment.

[0022] Furthermore, after the inspection is completed, the present invention clamps the tail end of the cylindrical product with a clamping device and runs in reverse with a synchronous belt drive mechanism, so that the cylindrical product can be smoothly withdrawn from the bore of the gauge and returned to the starting position, thereby forming a continuous inspection process of placement, advancement, inspection, clamping and retraction, improving the automation level and work efficiency of the inspection process.

[0023] Therefore, the present invention can solve the problems of low efficiency of manual operation, unstable product propulsion posture, poor detection consistency, complex equipment structure and high maintenance difficulty in the existing cylindrical product passability detection process. It has the beneficial effects of reasonable structure, stable operation, high detection efficiency, convenient maintenance and suitability for batch detection. Attached Figure Description

[0024] Figure 1 This is a front view of the bore detection system in an embodiment of the present invention; Figure 2This is a schematic diagram of the cylindrical product propulsion device in an embodiment of the present invention; Figure 3 This is a side view of the cylindrical product propulsion device in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the servo motor and reducer related parts in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the support block and related parts in an embodiment of the present invention; Figure 6 This is a front view of the support block related parts in an embodiment of the present invention; Figure 7 This is a schematic diagram of the bore gauge assembly in an embodiment of the present invention; Figure 8 This is a partial structural schematic diagram of the bore gauge assembly in an embodiment of the present invention; Figure 9 This is a schematic diagram of the clamping device in an embodiment of the present invention; Figure 10 This is a schematic diagram of the rear structure of the clamping device in an embodiment of the present invention; Figure 11 This is a schematic diagram of the structure of the anchor bolt-related parts in an embodiment of the present invention.

[0025] exist Figures 1 to 11 The reference numerals in the attached figures are explained as follows: 1. Gearbox housing; 2. Connecting rod; 3. Servo motor; 4. Reducer; 5. Synchronous belt; 6. Gearbox assembly frame; 7. Cylindrical product propulsion device frame; 8. Support leg; 9. Anchor bolt; 10. Fixing angle iron; 11. Locking nut; 12. Foot pad; 13. Adjusting screw; 14. Pulley; 15. Support block base; 16. Roller; 17. Rubber guard; 18. Bearing roller; 19. Slider seat; 20. Gripper; 21. Synchronous belt tensioning shaft; 22. Cylinder; 23. Gearbox bracket; 24. Cable chain; 25. Cable chain groove; 26. First proximity switch; 27. Guide rail; 28. Guide rail slider; 29. ​​Optical axis; 30. Mounting plate; 31. Booster block; 32. Cylinder fixing bracket; 33. Gearbox support. Detailed Implementation

[0026] To enable those skilled in the art to more clearly understand the technical solutions, technical features, and beneficial effects of the present invention, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the following embodiments are only for explaining the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0027] like Figures 1 to 11As shown, this embodiment provides a bore-closing detection system and method. This system is mainly used for bore-closing passability testing of cylindrical products. The system provides a detection benchmark through a bore-closing gauge assembly, provides multi-point support and synchronous propulsion of the cylindrical product through a product propulsion device, and coordinates the product placement detection, propulsion detection, and clamping / retraction processes through a control system, thereby achieving automated and stable testing of cylindrical products.

[0028] 1. System Overall Structure Please see Figures 1 to 11 This embodiment provides a bore-fitting inspection system for detecting the bore-fitting passability of cylindrical products to determine whether the outer envelope dimensions of the cylindrical products meet the bore-fitting requirements. The bore-fitting inspection system mainly includes a bore-fitting gauge assembly, a product propulsion device, and a control system. The bore-fitting gauge assembly forms a detection reference cavity, the product propulsion device stably propels the cylindrical product along the axial direction of the bore-fitting gauge assembly to the detection position, and the control system detects and controls the placement state, propulsion position, and retraction action of the cylindrical product.

[0029] Specifically, the bore gauge assembly includes a bore gauge body 1, a bore gauge assembly frame 6, and a bore gauge support 33. The bore gauge body 1 is a cylindrical structure with a preset inner diameter, and its inner cavity is designed for cylindrical products to enter. The bore gauge body 1 is mounted on the bore gauge assembly frame 6 via the bore gauge support 33, which keeps the bore gauge body 1 at a predetermined height and a predetermined axial position. By observing the passage of a cylindrical product into the bore gauge body 1, it can be determined whether the outer envelope dimensions of the cylindrical product meet the bore gauge fitting requirements.

[0030] The product propulsion device is located on one side of the bore fitting assembly and includes a cylindrical product propulsion device frame 7, a synchronous belt drive mechanism, multiple support blocks, and a clamping device. The synchronous belt drive mechanism is mounted on the cylindrical product propulsion device frame 7. The multiple support blocks and the clamping device are all connected to the synchronous belt drive mechanism and can move synchronously under the drive of the synchronous belt drive mechanism. The multiple support blocks are arranged at intervals along the axial direction of the cylindrical product to provide multi-point support for the cylindrical product during propulsion, so that the cylindrical product maintains a relatively stable posture before and after entering the bore fitting assembly 1.

[0031] The synchronous belt drive mechanism includes a servo motor 3, a reducer 4, a synchronous belt 5, a pulley 14, and a synchronous belt tensioning shaft 21. The servo motor 3 outputs power through the reducer 4, driving the synchronous belt 5 to circulate. The synchronous belt 5 drives multiple support blocks and clamping devices to move synchronously along the direction of the cylindrical product's advance, allowing the cylindrical product to enter the bore of the gauge 1 along its axial direction under multi-point support. Because the support blocks and the cylindrical product advance synchronously, the cylindrical product and the support blocks remain essentially stationary relative to each other, thereby reducing slippage, rolling, shaking, or attitude deviation during the advance process and improving the stability and consistency of the inspection process.

[0032] A clamping device is positioned at the tail end of the cylindrical product to hold the tail end after the cylindrical product completes the bore detection. Once the cylindrical product enters the bore chamber 1 and completes the detection, the control system controls the clamping device to clamp the tail end of the cylindrical product, while simultaneously controlling the synchronous belt drive mechanism to reverse, causing the cylindrical product to exit the bore chamber 1 and return to its starting position. Thus, the system can form a continuous operation process of cylindrical product placement, synchronous advancement, bore detection, clamping, and retraction.

[0033] The control system includes proximity switches, a controller, and an execution control unit connected to the servo motor 3 and the clamping device. The proximity switches may include a first proximity switch 26 located at the starting position of the cylindrical product and a second proximity switch located at the detection termination position. The first proximity switch 26 detects whether the cylindrical product is in place, and the second proximity switch detects whether the cylindrical product has reached the detection termination position. The controller controls the start and stop of the servo motor 3, the forward and reverse operation of the synchronous belt 5, and the clamping or releasing action of the clamping device based on the detection signals from the proximity switches.

[0034] In this embodiment, the bore gauge assembly and the product propulsion device can be connected by a connecting rod 2 to maintain a stable relative position between them, avoiding deviations between the bore gauge chamber 1 and the cylindrical product propulsion path caused by equipment vibration or stress during the testing process. Both the bore gauge assembly frame 6 and the cylindrical product propulsion device frame 7 can be installed, fixed, and height-adjusted using support legs 8, anchor bolts 9, fixing angle irons 10, foot pads 12, and adjusting screws 13, thus facilitating the alignment of the cylindrical product's propulsion axis with the axis of the bore gauge chamber 1 during installation and commissioning.

[0035] Through the aforementioned overall structure, the bore engagement detection system of this embodiment integrates the bore engagement gauge assembly, synchronous propulsion mechanism, multi-point support mechanism, clamping and retraction mechanism, and position detection and control mechanism into one unit, enabling cylindrical products to complete bore engagement passability testing under stable support and controlled propulsion. Compared with detection methods relying on manual propulsion or single-point support propulsion, this embodiment can effectively improve the stability of the product's propulsion posture, reduce manual intervention, improve detection efficiency and consistency, and reduce equipment structural complexity and maintenance difficulty.

[0036] 2. Fitting gauge assembly In this invention, the bore alignment gauge assembly is a key component for detecting the bore alignment passability of cylindrical products. Its main function is to provide a standardized cavity reference for the product, ensuring its stable posture during propulsion and accurately determining whether its external envelope dimensions meet predetermined requirements. Please refer to [link to relevant documentation]. Figure 1 , Figure 7 and Figure 8 .

[0037] The bore gauge assembly mainly includes the bore gauge body 1, the bore gauge assembly frame 6, and the bore gauge support 33. The bore gauge body 1 is cylindrical, with its inner diameter slightly larger than the outer diameter of the cylindrical product being inspected, and its length sufficient to accommodate the entire product to ensure that the product enters the bore smoothly without tilting or shaking. The bore gauge body can be made of steel, aluminum alloy, or hard plastic to meet different wear resistance and strength requirements.

[0038] The bore of the bore gauge 1 is fixed to the bore gauge assembly frame 6 via a bore gauge support 33. The support can be either fixed or adjustable. During installation and commissioning, the position of the bore can be finely adjusted to ensure accurate alignment between the bore axis and the product propulsion axis, thereby guaranteeing inspection accuracy. The bore gauge assembly frame 6 is constructed from welded square tubing or assembled profiles, providing stable support for the bore and reserving an installation interface for docking with the product propulsion device.

[0039] The bore gauge assembly is also equipped with a height adjustment mechanism, which allows for overall height and level adjustment via the support legs 8, foot blocks 12, and adjusting screws 13, enabling the bore to accommodate cylindrical products of different diameters and lengths. Furthermore, the bore material and support type can be replaced or adjusted according to the operating environment and maintenance requirements. For example, a steel bore and adjustable supports can be used in high-wear environments, while aluminum alloy or plastic materials can be used in lightweight or portable testing scenarios.

[0040] Through the above structural design, the bore gauge assembly provides a reliable testing benchmark in the system, while ensuring the flexibility of installation and debugging and the convenience of maintenance. It provides a guarantee for the stable advancement and efficient testing of cylindrical products, and at the same time provides full support for the relevant protection points in the claims.

[0041] 3. Product propulsion device Please see Figures 1 to 6 , Figure 9 and Figure 10 The product propulsion device is located on one side of the bore gauge assembly. It is mainly used to carry the cylindrical product and propel the cylindrical product in a straight line along the axial direction of the bore gauge chamber 1, so that the cylindrical product can stably enter the bore gauge chamber 1 to complete the bore passability test.

[0042] The product propulsion device includes a cylindrical product propulsion device frame 7, a synchronous belt drive mechanism, multiple support blocks, and a clamping device. The cylindrical product propulsion device frame 7, serving as the basic load-bearing structure of the product propulsion device, can be formed by welding square tubing or by assembling profiles. The cylindrical product propulsion device frame 7 is used to install and support components such as the servo motor 3, reducer 4, synchronous belt 5, pulley 14, guide rail 27, guide rail slider 28, support blocks, and clamping device.

[0043] like Figures 2 to 4 As shown, the synchronous belt drive mechanism includes a servo motor 3, a reducer 4, a synchronous belt 5, a pulley 14, and a synchronous belt tensioning shaft 21. The servo motor 3 is powered by the reducer 4, and the output end of the reducer 4 is connected to the synchronous belt tensioning shaft 21 via a coupling. The synchronous belt tensioning shaft 21 drives the synchronous belt 5. By cooperating to drive the synchronous belt 5 with the servo motor 3 and the reducer 4, speed and position control can be achieved during the propulsion process of cylindrical products, improving the stability and response accuracy of the propulsion action.

[0044] like Figure 2 , Figure 5 and Figure 6 As shown, multiple support blocks are spaced apart along the axial direction of the cylindrical product and connected to the synchronous belt 5. When the synchronous belt 5 is running, the multiple support blocks can move synchronously with the synchronous belt 5 to provide multi-point support for the cylindrical product during its advancement. Since the multiple support blocks move synchronously with the cylindrical product, the cylindrical product and the support blocks remain essentially stationary relative to each other, thereby reducing the sliding, rolling, sagging, or attitude deviation of the cylindrical product during its advancement.

[0045] The support block includes a support block base 15, with rollers 16 on both sides of the base 15. The rollers 16 roll on the cylindrical product propulsion device frame 7 to support the support block, allowing for smooth movement. The upper end of the support block base 15 has an arc-shaped groove for supporting the cylindrical product. A rubber guard 17 is installed on the arc-shaped groove, providing elastic contact with the cylindrical product to reduce impact or scratches to its surface. Bearing rollers 18 are also installed at both ends of the arc-shaped groove. These rollers guide the cylindrical product when it is placed on the support block, making it easier for the product to enter the support position within the arc-shaped groove.

[0046] In a preferred embodiment, three support blocks can be provided, respectively for supporting the front, middle, and rear of the cylindrical product. This three-point support improves the stress distribution on the long cylindrical product during propulsion, reducing the likelihood of sagging and swaying. It is understood that the number of support blocks is not limited to three; two, four, or more can be used depending on the length, weight, and detection accuracy requirements of the cylindrical product.

[0047] like Figure 2 and Figure 3 As shown, the synchronous belt 5 can be configured as a ring-shaped synchronous belt, forming a straight running section above the cylindrical product propulsion device frame 7. Multiple support blocks support the cylindrical product on this straight running section and move towards the bore chamber 1 along with the synchronous belt 5. After the synchronous belt 5 passes around the pulley 14, it forms a return section, where the support blocks can rotate back around the pulley 14 with the synchronous belt 5, thus achieving cyclical conveying of the support blocks. This structure reduces the need for a separate return mechanism, making the product propulsion device structure more compact.

[0048] like Figure 9 and Figure 10 As shown, the clamping device includes a slider seat 19, grippers 20, cylinders 22, an optical axis 29, a mounting plate 30, a pusher block 31, and a cylinder mounting bracket 32. The slider seat 19 cooperates with the guide rail 27 via a guide slider 28, enabling the clamping device to move linearly along the feeding direction of the cylindrical product. Two grippers 20 are positioned opposite each other on both sides of the tail end of the cylindrical product and are driven by corresponding cylinders 22. The cylinders 22 are mounted on the cylinder mounting bracket 32, and the optical axis 29 guides the movement of the grippers 20 and improves the stability of the grippers 20's movement during clamping.

[0049] During the process of pushing the cylindrical product into the bore of the gauge housing 1, the clamping device can move forward synchronously with the timing belt 5, but the gripper 20 can be in a released state. The cylindrical product is mainly supported by multiple support blocks and pushed forward by the booster block 31. When the cylindrical product enters the bore of the gauge housing 1 and reaches the detection termination position, the cylinder 22 drives the gripper 20 to clamp the tail end of the cylindrical product; then the timing belt 5 runs in reverse, the clamping device clamps the tail end of the cylindrical product, and pulls the cylindrical product back from the bore of the gauge housing 1 to the starting position.

[0050] In addition, the product propulsion device may also be equipped with a cable chain 24 and a cable chain groove 25. The cable chain 24 is used to accommodate air tubes, sensor harnesses, or control cables, and the cable chain groove 25 is used to support the cable chain 24 and define its movement path. When the clamping device moves forward or backward with the timing belt 5, the cable chain 24 can move with the clamping device, thereby avoiding the tangling of air tubes and harnesses, improving the reliability of system operation and the convenience of maintenance.

[0051] In alternative embodiments, the servo motor 3 can be replaced with a stepper motor or other controllable rotary drive; the synchronous belt 5 can be replaced with a chain, toothed belt or rack and pinion transmission mechanism, as long as it can achieve synchronous linear movement of multiple support blocks and clamping devices; the cylinder 22 can also be replaced with an electric push rod, electric gripper or hydraulic clamping mechanism; the rubber protection 17 can be replaced with a polyurethane pad, nylon pad or other elastic wear-resistant protective parts.

[0052] With the above structure, the product propulsion device can achieve stable support, synchronous propulsion and clamping retraction during the inspection of cylindrical products. This not only ensures the posture stability of the cylindrical product when it enters the bore of the gauge body 1, but also improves the degree of automation and continuous operation efficiency of the inspection.

[0053] 4. Control System In this invention, the control system is the core component of the cavity-closing detection system, enabling automation, precise advancement, and clamping / retraction. The control system monitors the placement, advancement, and retraction status of the cylindrical product throughout the entire detection process and coordinates the actions of the product advancement and clamping devices. Please refer to [link to relevant documentation]. Figure 1 , Figure 2 and Figure 9 .

[0054] The control system mainly includes a controller, proximity switches, signal lines, an execution control unit, and a drive device connected to the servo motor 3 and the clamping device. The controller can be a PLC, a microcontroller, or an embedded industrial controller. By receiving signals from the proximity switches, it sends control commands to the servo motor 3, the cylinder 22, and other actuators to achieve automated coordination of product advancement, clamping, and retraction.

[0055] In this embodiment, the first proximity switch 26 is positioned at the initial placement position of the cylindrical product to detect whether the product is correctly placed on the support block. The second proximity switch is positioned at the detection termination position to detect whether the product has successfully entered the bore chamber 1 and completed the detection. After the proximity switches detect the product's arrival signal, the controller controls the servo motor 3 to start the synchronous belt 5, causing the support block and clamping device to advance synchronously. When the product reaches the detection termination position, the controller controls the cylinder 22 to drive the gripper 20 to clamp the tail end of the cylindrical product, while simultaneously controlling the synchronous belt 5 to run in reverse, smoothly pulling the product back to the starting position.

[0056] The control system can also use cable carrier 24 to route cables and air pipes, neatly managing signal lines, cylinders 22, servo motors 3, and proximity switches to ensure the safety and reliability of system operation. The controller can be set with stroke limits, speed adjustment, and emergency stop functions to accommodate cylindrical products of different sizes, weights, or materials, while ensuring safe operation of the system under abnormal conditions.

[0057] In alternative implementations, the proximity switch can be a photoelectric sensor, Hall sensor or pressure sensor, the controller can be an industrial PLC or embedded control module of different brands, and the cylinder 22 can also be replaced with an electric clamping mechanism, as long as it can achieve accurate detection and synchronous pushing, clamping and retraction of cylindrical products.

[0058] Through the design of the above control system, the present invention realizes the automated propulsion and clamping retraction of cylindrical products, ensuring the stability of product posture, the smoothness of propulsion action and the continuity of the detection process, while improving the automation level and detection efficiency of the system.

[0059] 5. Testing Method and Procedure In this invention, the cavity detection method for cylindrical products achieves fully automated detection through a systematic operation process, ensuring that the product maintains a stable posture and reliable detection results throughout the entire process of advancing, detecting, and retracting.

[0060] First, the cylindrical product is placed on multiple support blocks, ensuring support at the front, middle, and rear, while the tail end is in contact with the pusher block. At this point, the first proximity switch, located at the starting position, detects whether the product is correctly placed and transmits the detection signal to the control system.

[0061] Once the control system receives the product arrival signal, the servo motor starts, and the synchronous belt drives the support block and clamping device to move synchronously along the axial direction of the cylindrical product. Supported by multiple points, the cylindrical product remains stable and will not slip, roll, or deviate during the advancement process, thus ensuring its smooth entry into the bore of the fitting gauge.

[0062] During the process of the product entering the cavity of the fitting gauge, the system uses mechanical limits or sensors to determine whether the product passes through the cavity smoothly. When a cylindrical product enters smoothly, it can be determined that its outer envelope size meets the fitting requirements, and the detection result is recorded by the control system for subsequent quality statistics or traceability.

[0063] After the inspection is completed, the clamping device holds the tail end of the cylindrical product and moves in the opposite direction with the synchronous belt to smoothly withdraw the product from the bore of the gauge. During the retraction process, the support block continues to support the product to ensure stability and prevent shaking or falling.

[0064] Once the product returns to its starting position, the clamping device releases its tail end, preparing for the inspection of the next product. Through this continuous process, the entire inspection operation achieves automated advancement, multi-point support, and orderly collaboration of clamping and retraction. This not only improves inspection efficiency and consistency but also reduces the difficulty of manual operation and maintenance, enabling the system to operate reliably in a mass production environment.

[0065] This invention is particularly suitable for inspecting cylindrical products with a large length-to-diameter ratio, such as gun barrels, rods, shafts, and tubular parts. Because multiple support blocks move synchronously with the cylindrical product, the product maintains a stable posture during inspection, thereby improving the accuracy and consistency of the inspection results.

[0066] As can be seen from the above embodiments, the bore-closing detection system and method provided by the present invention can organically combine the support, propulsion, bore-closing detection, and clamping and retraction processes of cylindrical products. This allows the cylindrical product to stably enter the bore-closing gauge body under multi-point support and synchronous propulsion, and smoothly exit after detection. This solution can improve the automation level, detection efficiency, and detection consistency of bore-closing passability detection of cylindrical products, while reducing the complexity of equipment structure and maintenance difficulty, making it suitable for batch detection scenarios of cylindrical products.

[0067] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various modifications, equivalent substitutions, combinations, or improvements can be made to the above embodiments without departing from the concept and principles of the present invention; any modifications, equivalent substitutions, combinations, or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0068] Furthermore, identical or similar parts among the various embodiments in the specification can be referred to mutually, and technical features in each embodiment can be combined with each other where there is no contradiction. The directional terms, quantitative limitations, and structural descriptions used in the specification are for ease of understanding of the invention only and should not be construed as limiting the scope of protection of the invention. The scope of protection of the invention should be determined by the claims.

Claims

1. A bore-closing detection system, characterized in that, include: A bore gauge assembly, including a bore gauge body with a preset inner diameter; A product propulsion device is disposed on one side of the fitting gauge assembly and is used to push a cylindrical product into the fitting gauge cavity along the axial direction of the fitting gauge cavity. The product propulsion device includes a frame, a synchronous belt drive mechanism, multiple support blocks, and a clamping device. The synchronous belt drive mechanism is mounted on the frame, and the plurality of support blocks and the clamping device are all connected to the synchronous belt drive mechanism and can move synchronously under the drive of the synchronous belt drive mechanism. The multiple support blocks are used to provide multi-point support for the cylindrical product during its advancement and move synchronously with the cylindrical product. The clamping device is used to clamp the tail end of the cylindrical product when the cylindrical product exits the bore of the fitting gauge. Specifically, the external envelope dimensions of the cylindrical product are determined by the passage status of the cylindrical product into the bore of the fitting gauge to determine whether the bore fitting requirements are met.

2. The bore-closing detection system according to claim 1, characterized in that, The plurality of support blocks are spaced apart along the axial direction of the cylindrical product, and include at least a first support block for supporting the front part of the cylindrical product, a second support block for supporting the middle part of the cylindrical product, and a third support block for supporting the rear part of the cylindrical product.

3. The bore-closing detection system according to claim 1, characterized in that, The synchronous belt drive mechanism includes a synchronous belt, pulleys, a servo motor, and a reducer. The servo motor drives the pulleys to rotate via the reducer, thereby driving the synchronous belt to run in a cycle.

4. The bore inspection system of claim 3, wherein, The synchronous belt has a straight running section located above the frame, and the plurality of support blocks support the cylindrical product on the straight running section and move forward synchronously with the cylindrical product; the length of the straight running section is not less than the maximum propulsion stroke required for the cylindrical product to enter the bore of the fitting gauge.

5. The bore inspection system of claim 3, wherein, The support block is fixed to the synchronous belt and can rotate back around the pulley with the synchronous belt to realize the cyclic conveying of the support block.

6. The bore inspection system of claim 1, wherein, The support block includes a support block base, on which an arc-shaped support groove for supporting cylindrical products is provided, and an elastic protective layer for elastic contact with the cylindrical products is provided on the arc-shaped support groove; rollers are respectively provided on both sides of the support block base, for rolling support of the support block when the support block moves with the timing belt, so as to improve the stability of the support block movement.

7. The bore inspection system of claim 6, wherein, Guide rollers are provided at both ends of the arc-shaped support groove to guide the cylindrical product smoothly into the arc-shaped support groove.

8. The bore inspection system of claim 1, wherein, The clamping device includes a slider seat, two grippers mounted on the slider seat, and two cylinders that drive the two grippers to move respectively; the two grippers are arranged opposite to each other and can clamp or release the tail end of the cylindrical product under the synchronous drive of the two cylinders.

9. The bore-closing detection system according to claim 1, characterized in that, It also includes a control system, which includes a first proximity switch located at the starting position of the cylindrical product and a second proximity switch located at the detection termination position of the cylindrical product; the control system controls the synchronous belt drive mechanism to start and stop according to the detection signals of the first proximity switch and the second proximity switch, and controls the clamping device to clamp or release the cylindrical product.

10. The bore inspection system of claim 1, wherein, During the advancement of the cylindrical product, the plurality of support blocks move synchronously with the cylindrical product to maintain a state of no relative sliding or essentially no relative sliding between the cylindrical product and the support blocks.

11. The bore inspection system of claim 8, wherein, The clamping device also includes a pusher block, which is disposed between or in front of the two jaws and is used to push the tail end of the cylindrical product toward the bore of the fitting gauge when the jaws are in the released state.

12. The bore inspection system of claim 6, wherein, Rollers are provided on both sides of the support block base to improve the stability of the support block's movement on the frame.

13. The bore inspection system of claim 1, wherein, A connecting rod is provided between the bore gauge assembly and the product propulsion device to maintain the relative position stability between the bore gauge body and the cylindrical product propulsion path.

14. A method of detecting a bore using the bore detection system of any one of claims 1 to 13, characterized in that, Includes the following steps: Place the cylindrical product on multiple support blocks and check if the cylindrical product is in the starting position; When the cylindrical product is in the starting position, the control synchronous belt drive mechanism drives multiple support blocks and clamping devices to move forward synchronously, so that the cylindrical product enters the bore of the bore along the axial direction of the bore. At the same time, during the advancement process, the support blocks and the cylindrical product move synchronously so that the cylindrical product and the support blocks maintain a state of no relative sliding. Based on the passage status of the cylindrical product into the bore of the fitting gauge, determine whether the outer envelope dimensions of the cylindrical product meet the fitting requirements. When the cylindrical product reaches the detection termination position, the clamping device is controlled to hold the tail end of the cylindrical product, and the synchronous belt drive mechanism is controlled to run in reverse, so that the cylindrical product is smoothly withdrawn from the bore of the gauge and returns to the starting position.

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