A multifunctional testing system and method for tin cans

Abstract

This invention belongs to the field of tin can manufacturing technology, specifically relating to a multifunctional tin can testing system and method. The system includes a turnover clamping assembly, an airtightness testing assembly, and a dynamic load pressure resistance and opening force testing assembly. The turnover clamping assembly has multiple stations along its circumference for clamping and transferring tin cans. The airtightness testing assembly includes an anti-collapse mechanism and an airtightness testing mechanism, which can prevent damage to the scoring lines on the can lid and test the airtightness of the double-hook edge structure. The dynamic load pressure resistance and opening force testing assembly can switch between testing the dynamic load pressure resistance of the can lid and the opening force of the spoon mounting groove as a recessed handle. This invention is adapted to improved tin can structures, integrates multiple testing functions, has high testing accuracy and efficiency, avoids can damage during testing, ensures product quality, reduces labor costs, and meets the needs of large-scale production.

Description

Technical Field

[0001] This invention belongs to the field of tin can manufacturing technology, specifically relating to a multifunctional testing system and method for tin cans. Background Technology

[0002] Tin cans are widely used in food, chemical, and pharmaceutical industries due to their excellent sealing, corrosion resistance, and environmental friendliness. Their quality directly affects the safety of the contents, storage stability, and user experience. However, traditional tin can structures have limitations. The lid lacks a spoon mounting slot, requiring an additional plastic cap to hold the spoon and a separate pull ring to open the tear-slotted lid. This design not only increases production steps and costs but also leads to poor compatibility between the plastic cap and can, and the pull ring easily detaches, impacting the overall practicality and cost-effectiveness of the product.

[0003] To address the structural defects of traditional tin cans, our company has designed an improved tin can. The lid of this can integrates a spoon mounting slot, which serves a dual function: firstly, the slot securely holds the spoon without requiring an additional plastic cover; secondly, after the spoon is removed, the slot functions as a recessed handle, allowing users to easily open the tear-slotted lid by gripping it, replacing the traditional pull-ring structure. This improved tin can simplifies the manufacturing process and reduces production costs.

[0004] Existing tin can testing systems are mostly designed for traditional tin can structures and cannot adapt to the special structure of the aforementioned improved tin cans. Specific shortcomings include: First, in the airtightness testing between the can body and lid, the scoring lines on the lid are prone to premature damage and deformation, leading to deviations in the airtightness test results. Second, existing testing systems lack the corresponding detection function for the newly added recessed handle (i.e., spoon mounting groove) on the improved tin cans, and cannot test whether the opening force of the recessed handle meets design standards. Third, existing tin can testing systems cannot test the dynamic load compressive strength of the lid, and cannot comprehensively assess the structural stability of the lid.

[0005] In view of this, the inventors aim to design a multifunctional testing system and method that can adapt to the structure of improved tin cans, integrate multiple testing functions, and improve testing efficiency. Summary of the Invention

[0006] The purpose of this invention is to overcome the above-mentioned problems in the prior art and provide a multifunctional testing system and method for tin cans.

[0007] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution: This invention provides a multi-functional inspection system for tin cans, comprising: A turnover clamping assembly is used to clamp tin cans and drive them to move circumferentially. The turnover clamping assembly is provided with a loading station, an airtightness testing station, a dynamic load pressure resistance and opening force testing station, and a unloading station along the circumferential direction. The tin can is composed of a can body and a can lid. The can lid and the can body are connected by a double hook edge structure. The can lid is provided with an annular reinforcing ring, an annular scoring line, and a spoon mounting groove from the outside to the inside. The two side walls of the spoon mounting groove are symmetrically stamped to form retaining edges. An airtightness testing component is positioned above the airtightness testing station and is used to test the airtightness of the double hook-edge structure. A dynamic load pressure resistance and opening force detection component is installed above the dynamic load pressure resistance and opening force detection station to detect the dynamic load pressure resistance and opening force of the can lid.

[0008] Furthermore, in the aforementioned multifunctional tin can inspection system, the turnover clamping assembly includes a turnover clamping base plate, a horizontal rotary driver, a turntable, an annular positioning seat, and a first vacuum pump. The turnover clamping base plate is supported by the turntable via the horizontal rotary driver. Multiple annular positioning seats that mate with the can body are installed circumferentially on the upper side of the turntable. The annular positioning seat has an annular adsorption cavity inside. The inner wall of the annular positioning seat is evenly distributed with several adsorption holes that communicate with the annular adsorption cavity. The suction pipe of the first vacuum pump is connected to the annular adsorption cavity.

[0009] Furthermore, in the aforementioned multifunctional tin can testing system, the airtightness testing component includes a grooved base plate, on which are installed an anti-collapse mechanism for pre-adsorbing and supporting the inner and outer areas of the annular groove line in the can lid before airtightness testing, and an airtightness testing mechanism for covering the double hook edge structure for airtightness testing.

[0010] Furthermore, in the aforementioned multi-functional tin can testing system, the anti-collapse mechanism includes an anti-collapse bracket, a first lifting push rod, an air guide shaft, a support plate, an inner adsorption ring, an outer adsorption ring, a second vacuum pump, and a first flexible hose. The first lifting push rod and the second vacuum pump are mounted on a grooved base plate via the anti-collapse bracket. The movable end of the first lifting push rod is supported by the support plate via the air guide shaft. The lower side of the support plate is equipped with an inner adsorption ring and an outer adsorption ring distributed in the inner and outer areas of the annular groove line. The air guide shaft, the support plate, the inner adsorption ring, and the outer adsorption ring are internally connected to form an adsorption channel. The suction end of the second vacuum pump is connected to the adsorption channel via the first flexible hose.

[0011] Furthermore, in the aforementioned multifunctional tin can testing system, the airtightness testing mechanism includes a cover, a horizontal worm gear screw jack, a horizontal guide rod, a third vacuum pump, a second hose, and a first pressure sensor. There are two covers, each consisting of a semi-circular cover, an upper half-shaft sleeve, a lower half-shaft sleeve, and a sealing end plate. The upper end of the semi-circular cover has an upper half-shaft sleeve that mates with the air guide shaft, and the lower end of the semi-circular cover has a lower half-shaft sleeve that mates with the can body. The semi-circular cover, upper half-shaft sleeve, and lower half-shaft sleeve have a sealing end plate at their mating surfaces. Each cover is horizontally displaced by a horizontal worm gear screw jack mounted on the corresponding side plate of the slotted base plate. A horizontal guide rod penetrating the corresponding side plate of the slotted base plate is installed on the outer side of each cover. The third vacuum pump is mounted on the web of the slotted base plate, and the suction end of the third vacuum pump is connected to the inner cavity of an adjacent semi-circular cover via a second hose. A first pressure sensor is embedded in one of the semi-circular covers.

[0012] Furthermore, in the aforementioned multifunctional tin can testing system, the dynamic load pressure resistance and opening force testing component includes a pressure resistance testing base plate, a steering drive motor, a rotating plate, a dynamic load pressure resistance testing mechanism, and an opening force testing mechanism. The pressure resistance testing base plate is supported by the steering drive motor and has a rotating plate. One end of the rotating plate is equipped with a dynamic load pressure resistance testing mechanism for testing the dynamic load pressure resistance performance of the area surrounding the annular scoring line in the can lid. The other end of the rotating plate is equipped with an opening force testing mechanism for testing the opening force required to tear open the annular scoring line using a spoon mounting groove as a recessed handle.

[0013] Furthermore, in the aforementioned multifunctional tin can testing system, the dynamic load pressure testing mechanism includes a vertical plate, a vertical rotary actuator, a carrier plate, a hammer box, an adjusting push rod, a connecting plate, a support rod, mechanical grippers, and a combination hammer. The vertical plate is fixed on a rotating plate, and the carrier plate is supported by the vertical rotary actuator. The hammer box and the adjusting push rod are mounted on the carrier plate. The movable end of the adjusting push rod is supported by the connecting plate and the support rod, and a mechanical gripper located in the hammer box is located therein. The mechanical gripper has two locking claws that can move relative to each other. The combination hammer is slidably restricted in the hammer box. The combination hammer is composed of a hammer block, a hammer rod, and a hammer pressure plate connected in sequence. The outer end of the hammer block has a locking groove that cooperates with the locking claws. The two end plates of the hammer box have through holes to facilitate the passage of the support rod and the hammer rod. The outer diameter of the hammer pressure plate is smaller than the maximum diameter of the inner area of ​​the annular scoring line in the can lid.

[0014] Furthermore, in the aforementioned multi-functional tin can detection system, the opening force detection mechanism includes an opening force detection bracket, a second lifting push rod, a rotary joint, a vertical shaft, an opening pull head, a second pressure sensor, a flip motor, and a belt drive. The opening force detection bracket is equipped with the second lifting push rod and the flip motor. The movable end of the second lifting push rod is connected to the upper end of the vertical shaft via the rotary joint. The lower end of the vertical shaft is equipped with an opening pull head. The width of the opening pull head is less than the minimum distance between the two flanges in the can lid, and the length of the opening pull head is less than the width of the spoon mounting groove and greater than the minimum distance between the two flanges. The upper side of the opening pull head is embedded with the second pressure sensor. The output shaft of the flip motor drives the vertical shaft to rotate around its own axis via the belt drive. The outer side of the vertical shaft is symmetrically provided with keyways. The driven pulley of the belt drive is sleeved on the outer side of the vertical shaft and is provided with movable support by the opening force detection bracket. The driven pulley is provided with a protruding key that mates with the keyway on the inner wall of the shaft hole.

[0015] Furthermore, the aforementioned multi-functional tin can testing system also includes a controller, which is connected to the turnover clamping assembly, the airtightness testing assembly, and the dynamic load pressure and opening force testing assembly.

[0016] This invention also provides a multi-functional testing method for tin cans, based on the aforementioned multi-functional testing system for tin cans, comprising the following steps: S1. An empty tin can is used as the test object, with a hole pre-drilled in the lower part of the can body; S2. Place the tin can in the annular positioning seat of the loading station. Start the first vacuum pump and use the annular adsorption chamber and adsorption holes to adsorb and fix the outer wall of the can, thus completing the positioning and clamping of the tin can. Then, start the horizontal rotary drive to drive the turntable to rotate and transfer the positioned tin can to the airtightness testing station. S3. The anti-collapse mechanism is activated. The first lifting push rod drives the support plate, inner adsorption ring, and outer adsorption ring to descend, so that the inner adsorption ring fits the inner area of ​​the annular groove line on the can cover, and the outer adsorption ring fits the outer area of ​​the annular groove line. The second vacuum pump is activated, and pre-adsorption support is applied to the corresponding area of ​​the can cover through the adsorption channel. Immediately afterwards, two horizontal worm gear screw lifts are activated simultaneously, driving the two semi-circular covers to approach and dock with each other. The upper half-shaft sleeve seals with the air guide shaft, and the lower half-shaft sleeve seals with the outer wall of the can body. The sealing end plate achieves the sealing of the docking surface of the two semi-circular covers, forming a sealed cavity covering the double hook edge structure. Then, the third vacuum pump is activated to evacuate the sealed cavity. The first pressure sensor detects the pressure value in the sealed cavity in real time and transmits the data to the controller. The controller judges whether the air tightness of the double hook edge structure is qualified based on the pressure value change. After the test is completed, the anti-collapse mechanism and the air tightness detection mechanism are reset, the turntable continues to rotate, and the tin can is transferred to the dynamic load pressure resistance and opening force detection station. S4. When dynamic load pressure test is selected, the steering drive motor starts, driving the rotating plate to rotate, so that the dynamic load pressure test mechanism is aligned with the inner area of ​​the annular scoring line on the can cover; the vertical rotation drive starts, the angle of the carrier plate is adjusted to a suitable position, the push rod is adjusted to adjust the hammering height of the combined hammer, the mechanical gripper is unlocked, and the combined hammer falls under the action of gravity, impacting the inner area of ​​the annular scoring line on the can cover through the hammer pressure plate to complete the dynamic load pressure test; When the opening force detection is selected, the steering drive motor starts again, driving the rotating plate to rotate, so that the opening force detection mechanism is aligned with the spoon mounting slot of the can lid; the second lifting push rod drives the opening pull head to descend and insert into the spoon mounting slot between the two stops, the flip motor starts, and drives the vertical shaft to rotate through the belt drive, so that the opening pull head rotates 90 degrees and is located below the stops; then the second lifting push rod slowly retracts, driving the opening pull head to pull upward, and the second pressure sensor detects the opening force data in real time during the lifting process and transmits it to the controller.

[0017] The beneficial effects of this invention are: This invention provides a multi-functional testing system and method for improved tin cans with integrated spoon mounting slots and recessed handles. The system incorporates an anti-collapse mechanism to pre-adsorb and support the inner and outer areas of the can lid's scoring lines during airtightness testing, effectively preventing premature breakage or deformation of the can lid and ensuring the accuracy of airtightness test results for the double-hook structure. Simultaneously, it innovatively integrates dynamic load compressive strength and opening force testing functions, enabling standardized testing of the impact resistance of the inner area of ​​the can lid's annular scoring lines and the opening force required to tear open the can lid using the spoon mounting slot as a handle. Furthermore, the system utilizes a turnover clamping assembly to automate the multi-station workflow, including loading, airtightness testing, dynamic load compressive strength and opening force testing, and unloading, significantly improving testing efficiency and automation. This allows for a comprehensive evaluation of the structural stability and practical performance of the improved tin can, providing a reliable guarantee for product quality.

[0018] Of course, any product implementing this invention does not necessarily need to achieve all of the above advantages at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a schematic diagram of the structure of the tin can in this invention; Figure 3 This is a cross-sectional view of the tin can from one angle according to the present invention; Figure 4 This is a cross-sectional view of the tin can from another angle in this invention; Figure 5 This is a schematic diagram of the structure of the turnover clamping component in this invention; Figure 6 This is a schematic diagram of the airtightness detection component in this invention; Figure 7 This is a schematic diagram of the anti-collapse mechanism in this invention; Figure 8 This is a bottom view of the inner and outer adsorption rings in this invention; Figure 9 This is a schematic diagram of the airtightness detection mechanism in this invention; Figure 10 This is a schematic diagram of the structure of the cover in this invention; Figure 11 This is a schematic diagram of the dynamic load compressive strength and opening force detection component in this invention; Figure 12 This is a schematic diagram of the dynamic load compressive strength testing mechanism in this invention; Figure 13 This is a schematic diagram of the composition of the combined hammer in this invention; Figure 14 This is a schematic diagram of the opening force detection mechanism in this invention; In the attached diagram, the components represented by each number are as follows: 1-Turnaround clamping assembly, 11-Turnaround clamping base plate, 12-Horizontal rotary driver, 13-Turntable, 14-Annular positioning seat, 15-Annular adsorption chamber, 16-Adsorption hole, 17-First vacuum pump; 2-Air tightness testing component, 21-Slotted base plate, 22-Anti-collapse mechanism, 221-Anti-collapse bracket, 222-First lifting push rod, 223-Air guide shaft, 224-Support plate, 225-Inner adsorption ring, 226-Outer adsorption ring, 227-Adsorption channel, 228-Second vacuum pump, 229-First hose, 23-Air tightness testing mechanism, 231-Covering cover, 231a-Semi-circular cover, 231b-Upper half-shaft sleeve, 231c-Lower half-shaft sleeve, 231d-Sealing end plate, 232-Horizontal worm gear screw jack, 233-Horizontal guide rod, 234-Third vacuum pump, 235-Second hose, 236-First pressure sensor; 3-Dynamic load compressive strength and opening force detection component; 31-Compression detection base plate; 32-Steering drive motor; 33-Rotating plate; 34-Dynamic load compressive strength detection mechanism; 341-Upright plate; 342-Vertical rotation drive; 343-Carrier plate; 344-Hammer box; 345-Adjusting push rod; 346-Connecting plate; 347-Support rod; 348-Mechanical gripper; 349-Combined hammer; 349a-Hammer block; 349b-Hammer rod; 349c-Hammer pressure plate; 349d-Lock groove; 35-Opening force detection mechanism; 351-Opening force detection bracket; 352-Second lifting push rod; 353-Rotary joint; 354-Vertical shaft; 355-Opening pull head; 356-Second pressure sensor; 357-Tilting motor; 358-Belt drive component; 4- Tin can, 41- Can body, 42- Can lid, 43- Double hook edge structure, 44- Ring reinforcing ring, 45- Ring scoring line, 46- Spoon mounting slot, 47- Edge guard. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figures 1-4 As shown, this embodiment provides a multi-functional testing system for tin cans, including a turnover clamping component 1, an airtightness testing component 2, and a dynamic load compressive strength and opening force testing component 3. The turnover clamping assembly 1 is used to clamp the tin can 4 and drive it to move circumferentially. The turnover clamping assembly 1 is provided with a loading station, an airtightness testing station, a dynamic load pressure resistance and opening force testing station, and a unloading station along the circumferential direction. The tin can 4 is composed of a can body 41 and a can lid 42. The can lid 42 and the can body 41 are connected by a double hook edge structure 43. The can lid 42 is provided with an annular reinforcing ring 44, an annular scoring line 45, and a spoon mounting groove 46 from the outside to the inside. The spoon mounting groove 46 is eccentrically set, and the length direction of the spoon mounting groove 46 is the radial direction of the can lid 42. The two side walls of the spoon mounting groove 46 are symmetrically stamped to form retaining edges 47. The airtightness testing assembly 2 is set above the airtightness testing station and is used to test the airtightness of the double hook edge structure 43. The dynamic load pressure resistance and opening force testing assembly 3 is set above the dynamic load pressure resistance and opening force testing station and is used to test the dynamic load pressure resistance and opening force of the can lid 42 respectively.

[0023] like Figure 5As shown, the turnover clamping assembly 1 includes a turnover clamping base plate 11, a horizontal rotary driver 12, a turntable 13, an annular positioning seats 14, and a first vacuum pump 17. The turnover clamping base plate 11 is supported by the turntable 13 via the horizontal rotary driver 12. Multiple annular positioning seats 14 that mate with the can body 41 are mounted circumferentially on the upper side of the turntable 13. The annular positioning seats 14 have an annular adsorption chamber 15 inside, and the inner wall of the annular positioning seats 14 is evenly distributed with a number of adsorption holes 16 that communicate with the annular adsorption chamber 15. The suction pipe of the first vacuum pump 17 is connected to the annular adsorption chamber 15.

[0024] The working principle of the turnover clamping assembly 1 is as follows: After the first vacuum pump 17 is started, the air in the annular adsorption chamber 15 inside the annular positioning seat 14 is drawn out through the suction pipe, so that the annular adsorption chamber 15 forms a negative pressure. The negative pressure acts on the outer wall of the can body 41 through the adsorption holes 16 evenly distributed on the inner wall, so as to achieve stable adsorption and fixation of the can body 41. The horizontal rotary driver 12 drives the turntable 13 to rotate at a uniform speed, so that the tin can 4 on the annular positioning seat 14 passes through the four stations of feeding, air tightness test, dynamic load pressure and opening force test, and unloading in sequence, so as to complete the orderly connection of each link of the test and ensure the continuous and efficient test process.

[0025] like Figure 6 As shown, the airtightness testing component 2 includes a grooved base plate 21, on which are mounted an anti-collapse mechanism 22 for pre-adsorption support of the inner and outer areas of the annular groove line 45 in the can lid 42 before airtightness testing, and an airtightness testing mechanism 23 for covering the double hook edge structure 43 for airtightness testing.

[0026] like Figures 7-8 As shown, the anti-collapse mechanism 22 includes an anti-collapse bracket 221, a first lifting push rod 222, an air guide shaft 223, a support plate 224, an inner adsorption ring 225, an outer adsorption ring 226, a second vacuum pump 228, and a first flexible hose 229. The first lifting push rod 222 and the second vacuum pump 228 are mounted on the grooved base plate 21 via the anti-collapse bracket 221. The movable end of the first lifting push rod 222 is supported by the support plate 224 via the air guide shaft 223. The inner adsorption ring 225 and the outer adsorption ring 226, distributed in the inner and outer areas of the annular groove line 45, are installed on the lower side of the support plate 224. The air guide shaft 223, the support plate 224, the inner adsorption ring 225, and the outer adsorption ring 226 are internally connected to form an adsorption channel 227. The suction end of the second vacuum pump 228 is connected to the adsorption channel 227 via the first flexible hose 229.

[0027] The working principle of the anti-collapse mechanism 22 is as follows: Before the airtightness test, the first lifting push rod 222 extends, driving the air guide shaft 223, the support plate 224 and the inner adsorption ring 225 and the outer adsorption ring 226 below to descend, so that the inner adsorption ring 225 fits into the inner area of ​​the annular etched line 45 of the can cover 42, and the outer adsorption ring 226 fits into the outer area of ​​the etched line; then the second vacuum pump 228 starts, and draws air from the adsorption area through the first hose 229 and the adsorption channel 227 (through the air guide shaft 223, the support plate 224 and the inner and outer adsorption rings) to form a negative pressure adsorption, which pre-supports the etched line area of ​​the can cover 42 to prevent the can cover 42 from collapsing and the etched line from breaking during the subsequent vacuum test, thus ensuring the stability of the test.

[0028] like Figures 9-10 As shown, the airtightness testing mechanism 23 includes a cover 231, a horizontal worm gear screw jack 232, a horizontal guide rod 233, a third vacuum pump 234, a second hose 235, and a first pressure sensor 236. There are two covers 231, each consisting of a semi-circular cover 231a, an upper half-shaft sleeve 231b, a lower half-shaft sleeve 231c, and a sealing end plate 231d. The upper end of the semi-circular cover 231a is provided with an upper half-shaft sleeve 231b that mates with the air guide shaft 223. 1b. The lower end of the semicircular cover 231a is provided with a lower half-shaft sleeve 231c that mates with the tank body 41. The semicircular cover 231a, the upper half-shaft sleeve 231b, and the lower half-shaft sleeve 231c are provided with sealing end plates 231d at the mating surfaces. Each cover 231 is driven to move horizontally by a horizontal worm gear screw jack 232 installed on the corresponding side plate of the grooved base plate 21. A horizontal guide rod 233 penetrating the corresponding side plate of the grooved base plate 21 is installed on the outside of each cover 231. A third vacuum pump 234 is installed on the web of the grooved base plate 21. The suction end of the third vacuum pump 234 is connected to the inner cavity of the adjacent semicircular cover 231a through a second hose 235. A first pressure sensor 236 is embedded in one of the semicircular covers 231a.

[0029] The working principle of the airtightness testing mechanism 23 is as follows: After the anti-collapse support is completed, the two horizontal worm gear screw jacks 232 start synchronously, driving the two semi-circular covers 231a to move towards each other and dock along the horizontal guide rod 233. The upper half bushing 231b is sealed to the air guide shaft 223, and the lower half bushing 231c is sealed to the outer wall of the tank body 41. The sealing end plate 231d seals the docking surface of the two semi-circular covers 231a, forming a sealed cavity covering the double hook edge structure 43. The third vacuum pump 234 starts to evacuate the sealed cavity. The first pressure sensor 236 collects the pressure data in the sealed cavity in real time and transmits it to the controller. If the pressure value remains stable, it indicates that the airtightness of the double hook edge structure 43 is qualified. If the pressure value drops, it indicates that there is a leak, thus achieving accurate airtightness testing.

[0030] like Figure 11As shown, the dynamic load pressure resistance and opening force detection assembly 3 includes a pressure resistance detection base plate 31, a steering drive motor 32, a rotating plate 33, a dynamic load pressure resistance detection mechanism 34, and an opening force detection mechanism 35. The pressure resistance detection base plate 31 is supported by the rotating plate 33 via the steering drive motor 32. One end of the rotating plate 33 is equipped with a dynamic load pressure resistance detection mechanism 34 for detecting the dynamic load pressure resistance of the inner area of ​​the annular scoring line 45 in the can lid 42. The other end of the rotating plate 33 is equipped with an opening force detection mechanism 35 for detecting the opening force required to tear open the annular scoring line 45 using the spoon mounting groove 46 as a recessed handle.

[0031] like Figures 12-13 As shown, the dynamic load compressive strength testing mechanism 34 includes a vertical plate 341, a vertical rotary drive 342, a carrier plate 343, a hammer box 344, an adjusting push rod 345, a connecting plate 346, a support rod 347, a mechanical gripper 348, and a combined hammer 349. The upright plate 341 is fixed on the rotating plate 33. The upright plate 341 is supported by the carrier plate 343 via the vertical rotary drive 342. The carrier plate 343 is equipped with a hammer box 344 and an adjusting push rod 345. The movable end of the adjusting push rod 345 is supported by the mechanical gripper 348 located in the hammer box 344 via the connecting plate 346 and the support rod 347. The mechanical gripper 348 is provided with two locking claws that can move relative to each other. The hammer box 344 has a sliding restriction of the combined hammer 349. The combined hammer 349 is composed of a hammer block 349a, a hammer rod 349b and a hammer pressure plate 349c connected in sequence. The outer end of the hammer block 349a is provided with a locking groove 349d that cooperates with the locking claws. The two end plates of the hammer box 344 are respectively provided with through holes to facilitate the passage of the support rod 347 and the hammer rod 349b. The outer diameter of the hammer pressure plate 349c is smaller than the maximum diameter of the inner area of ​​the annular scoring line 45 in the can lid 42.

[0032] The working principle of the dynamic load pressure testing mechanism 34 is as follows: the steering drive motor 32 drives the rotating plate 33 to rotate, so that the dynamic load pressure testing mechanism 34 is aligned with the inner area of ​​the annular scoring line 45 of the can cover 42; the vertical rotary drive 342 adjusts the angle of the carrier plate 343 so that the hammering direction of the combined hammer 349 is in contact with the testing area; the adjusting push rod 345 extends or retracts, and drives the mechanical gripper 348 to move through the connecting plate 346 and the support rod 347, thereby adjusting the height of the combined hammer 349 in the hammer box 344 to determine the hammering force; after the mechanical gripper 348 is unlocked, the combined hammer 349 slides down along the hammer box 344 under the action of gravity, and impacts the inner area of ​​the scoring line of the can cover 42 through the hammer pressure plate 349c, simulating the dynamic load pressure in actual use, and completing the dynamic load pressure performance test. Then, the vertical rotary drive 342 drives the hammer box 344 to rotate at a certain angle, so that the combined hammer 349 slowly slides back to its original position.

[0033] like Figure 14As shown, the opening force detection mechanism 35 includes an opening force detection bracket 351, a second lifting push rod 352, a rotary joint 353, a vertical shaft 354, an opening pull head 355, a second pressure sensor 356, a tilting motor 357, and a belt drive component 358. The second lifting push rod 352 and the tilting motor 357 are mounted on the opening force detection bracket 351. The movable end of the second lifting push rod 352 is connected to the upper end of the vertical shaft 354 via the rotary joint 353, and the opening pull head 355 is mounted on the lower end of the vertical shaft 354. The width of the pull tab 355 is less than the minimum distance between the two flanges 47 in the lid 42. The length of the pull tab 355 is less than the width of the spoon mounting groove 46 and greater than the minimum distance between the two flanges 47. A second pressure sensor 356 is embedded in the upper side of the pull tab 355. The output shaft of the flip motor 357 drives the vertical shaft 354 to rotate around its own axis via the belt drive 358. Keyways are symmetrically provided on the outer side of the vertical shaft 354. The driven pulley of the belt drive 358 is sleeved on the outer side of the vertical shaft 354 and is provided with movable support by the opening force detection bracket 351. The driven pulley has a convex key that mates with the keyway on the inner wall of the shaft hole.

[0034] The working principle of the opening force detection mechanism 35 is as follows: the steering drive motor 32 drives the rotating plate 33 to rotate, so that the opening force detection mechanism 35 is aligned with the spoon mounting slot 46 of the can lid 42; the second lifting push rod 352 extends, driving the vertical shaft 354 and the opening pull head 355 to descend, inserting the opening pull head 355 between the two flanges 47 of the spoon mounting slot 46; the flip motor 357 starts, driving the vertical shaft 354 to rotate 90 degrees through the belt drive component 358, so that the opening pull head 355 is engaged below the flange 47; then the second lifting push rod 352 slowly retracts, driving the opening pull head 355 to lift upwards, and the second pressure sensor 356 detects the opening force data in real time during the lifting process and transmits it to the controller to determine whether the opening force meets the design standard, thus achieving accurate detection of the opening force.

[0035] In this embodiment, the system also includes a controller, which is connected to the turnover clamping component 1, the airtightness detection component 2, and the dynamic load compressive strength and opening force detection component 3, respectively.

[0036] This embodiment also provides a multi-functional testing method for tin cans, including the following steps: S1. An empty tin can 4 is used as the test object, and a hole is pre-drilled in the lower part of the can body 41. S2. Place the tin can 4 in the annular positioning seat 14 of the loading station. Start the first vacuum pump 17. The outer wall of the can body 41 is adsorbed and fixed through the annular adsorption chamber 15 and adsorption hole 16 to complete the positioning and clamping of the tin can 4. Then, start the horizontal rotary drive 12 to drive the turntable 13 to rotate and transfer the positioned tin can 4 to the airtightness test station. S3. The anti-collapse mechanism 22 is activated. The first lifting push rod 222 drives the support plate 224, the inner adsorption ring 225, and the outer adsorption ring 226 to descend, so that the inner adsorption ring 225 fits into the inner area of ​​the annular groove line 45 of the can cover 42, and the outer adsorption ring 226 fits into the outer area of ​​the annular groove line 45. The second vacuum pump 228 is activated, and pre-adsorption support is performed on the corresponding area of ​​the can cover 42 through the adsorption channel 227. Immediately afterwards, the two horizontal worm gear screw jacks 232 are activated simultaneously, driving the two semi-circular covers 231a to approach and dock with each other. The upper half shaft sleeve 231b is sealed with the air guide shaft 223, and the lower half shaft... The sleeve 231c is sealed to the outer wall of the can body 41, and the sealing end plate 231d seals the mating surfaces of the two semi-circular covers 231a, forming a sealed cavity covering the double hook structure 43. Then, the third vacuum pump 234 is started to evacuate the sealed cavity. The first pressure sensor 236 detects the pressure value in the sealed cavity in real time and transmits the data to the controller. The controller judges whether the airtightness of the double hook structure 43 is qualified based on the pressure value change. After the test is completed, the anti-collapse mechanism 22 and the airtightness detection mechanism 23 are reset, and the turntable 13 continues to rotate, transferring the tin can 4 to the dynamic load pressure resistance and opening force detection station. S4. When dynamic load pressure test is selected, the steering drive motor 32 starts, driving the rotating plate 33 to rotate, so that the dynamic load pressure test mechanism 34 is aligned with the inner area of ​​the annular scoring line 45 of the can cover 42; the vertical rotation drive 342 starts, the angle of the carrier plate 343 is adjusted to a suitable position, the push rod 345 adjusts the hammering height of the combined hammer 349, the mechanical gripper 348 unlocks, and the combined hammer 349 falls under the action of gravity, impacting the inner area of ​​the annular scoring line 45 of the can cover 42 through the hammer pressure plate 349c, thus completing the dynamic load pressure test; When the opening force detection is selected, the steering drive motor 32 starts again, driving the rotating plate 33 to rotate, so that the opening force detection mechanism 35 is aligned with the spoon mounting slot 46 of the can lid 42; the second lifting push rod 352 drives the opening pull head 355 to descend and insert into the spoon mounting slot 46 between the two flanges 47, the flip motor 357 starts, and drives the vertical shaft 354 to rotate through the belt drive component 358, so that the opening pull head 355 rotates 90 degrees and is located below the flange 47; then the second lifting push rod 352 slowly retracts, driving the opening pull head 355 to pull upward, and the second pressure sensor 356 detects the opening force data in real time during the lifting process and transmits it to the controller.

[0037] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-functional inspection system for tin cans, characterized in that, include: A turnover clamping assembly is used to clamp tin cans and drive them to move circumferentially. The turnover clamping assembly is provided with a loading station, an airtightness testing station, a dynamic load pressure resistance and opening force testing station, and a unloading station along the circumferential direction. The tin can is composed of a can body and a can lid. The can lid and the can body are connected by a double hook edge structure. The can lid is provided with an annular reinforcing ring, an annular scoring line, and a spoon mounting groove from the outside to the inside. The two side walls of the spoon mounting groove are symmetrically stamped to form retaining edges. An airtightness testing component is positioned above the airtightness testing station and is used to test the airtightness of a double-hook-edge structure. The airtightness testing component includes a grooved base plate on which are mounted an anti-collapse mechanism for pre-adsorption support of the inner and outer areas of the annular groove line in the can lid before airtightness testing, and an airtightness testing mechanism for covering and testing the double-hook-edge structure. The anti-collapse mechanism includes an anti-collapse bracket, a first lifting push rod, a gas guide shaft, a support plate, an inner adsorption ring, an outer adsorption ring, a second vacuum pump, and a first flexible hose. The first lifting push rod and the second vacuum pump are mounted on the grooved base plate via the anti-collapse bracket. The movable end of the first lifting push rod is supported by the support plate via the gas guide shaft. The lower side of the support plate is equipped with inner and outer adsorption rings distributed in the inner and outer areas of the annular groove lines. The internal connections of the air guide shaft, support plate, inner adsorption rings, and outer adsorption rings form an adsorption channel. The suction end of the second vacuum pump is connected to the adsorption channel via a first flexible hose. The airtightness detection mechanism includes a cover, a horizontal worm gear screw jack, a horizontal guide rod, a third vacuum pump, a second flexible hose, and a first pressure sensor. There are two covers, each consisting of a semi-circular cover, an upper half-shaft sleeve, a lower half-shaft sleeve, and a sealing end plate. The upper end of the semi-circular cover is provided with an upper half-shaft sleeve that mates with the air guide shaft, and the lower end of the semi-circular cover is provided with a lower half-shaft sleeve that mates with the tank body. The semi-circular cover, upper half-shaft sleeve, and lower half-shaft sleeve are provided with a sealing end plate at their mating surfaces. A dynamic load pressure resistance and opening force detection component is installed above the dynamic load pressure resistance and opening force detection station to detect the dynamic load pressure resistance and opening force of the can lid.

2. The multi-functional inspection system for tin cans according to claim 1, characterized in that, The turnover clamping assembly includes a turnover clamping base plate, a horizontal rotary driver, a turntable, an annular positioning seat, and a first vacuum pump. The turnover clamping base plate is supported by the turntable via the horizontal rotary driver. Multiple annular positioning seats that mate with the can body are installed circumferentially on the upper side of the turntable. The annular positioning seat has an annular adsorption cavity inside. The inner wall of the annular positioning seat is evenly distributed with a number of adsorption holes that communicate with the annular adsorption cavity. The suction pipe of the first vacuum pump is connected to the annular adsorption cavity.

3. The multi-functional testing system for tin cans according to claim 2, characterized in that, Each of the enclosing covers is driven to move horizontally by a horizontal worm gear screw jack installed on the corresponding side plate of the slotted substrate. A horizontal guide rod penetrating the corresponding side plate of the slotted substrate is installed on the outside of each of the enclosing covers. The third vacuum pump is installed on the web of the slotted substrate. The suction end of the third vacuum pump is connected to the inner cavity of the adjacent semi-circular cover via a second hose. A first pressure sensor is embedded in one of the semi-circular covers.

4. The multi-functional inspection system for tin cans according to claim 3, characterized in that, The dynamic load compressive strength and opening force detection assembly includes a compressive strength detection base plate, a steering drive motor, a rotating plate, a dynamic load compressive strength detection mechanism, and an opening force detection mechanism. The compressive strength detection base plate is supported by the steering drive motor and has a rotating plate. One end of the rotating plate is equipped with a dynamic load compressive strength detection mechanism for detecting the dynamic load compressive strength of the area surrounding the annular scoring line in the can lid. The other end of the rotating plate is equipped with an opening force detection mechanism for detecting the opening force required to tear open the annular scoring line using a spoon mounting groove as a recessed handle.

5. The multifunctional inspection system for tin cans according to claim 4, characterized in that, The dynamic load compressive strength testing mechanism includes a vertical plate, a vertical rotary actuator, a carrier plate, a hammer box, an adjusting push rod, a connecting plate, a support rod, mechanical grippers, and a combination hammer. The vertical plate is fixed on a rotating plate, and the carrier plate is supported by the vertical rotary actuator. The hammer box and the adjusting push rod are mounted on the carrier plate. The movable end of the adjusting push rod is supported by the connecting plate and the support rod, and a mechanical gripper located in the hammer box is located therein. The mechanical gripper has two locking claws that can move relative to each other. The combination hammer is slidably restricted in the hammer box. The combination hammer is composed of a hammer block, a hammer rod, and a hammer pressure plate connected in sequence. The outer end of the hammer block has a locking groove that cooperates with the locking claws. The two end plates of the hammer box have through holes to facilitate the passage of the support rod and the hammer rod. The outer diameter of the hammer pressure plate is smaller than the maximum diameter of the inner area of ​​the annular scoring line in the can lid.

6. The multi-functional inspection system for tin cans according to claim 5, characterized in that, The opening force detection mechanism includes an opening force detection bracket, a second lifting push rod, a rotary joint, a vertical shaft, an opening pull head, a second pressure sensor, a flip motor, and a belt drive. The opening force detection bracket is equipped with the second lifting push rod and the flip motor. The movable end of the second lifting push rod is connected to the upper end of the vertical shaft via the rotary joint. The lower end of the vertical shaft is equipped with an opening pull head. The width of the opening pull head is less than the minimum distance between the two flanges in the can lid, and the length of the opening pull head is less than the width of the spoon mounting groove and greater than the minimum distance between the two flanges. The upper side of the opening pull head is embedded with the second pressure sensor. The output shaft of the flip motor drives the vertical shaft to rotate around its own axis via the belt drive. The outer side of the vertical shaft is symmetrically provided with keyways. The driven pulley of the belt drive is sleeved on the outer side of the vertical shaft and is provided with movable support by the opening force detection bracket. The driven pulley has a protruding key on the inner wall of the shaft hole that mates with the keyway.

7. The multi-functional inspection system for tin cans according to claim 6, characterized in that, It also includes a controller, which is connected to the turnover clamping assembly, the airtightness detection assembly, and the dynamic load compressive strength and opening force detection assembly, respectively.

8. A multi-functional testing method for tin cans, implemented based on the multi-functional testing system for tin cans as described in claim 7, characterized in that, Includes the following steps: S1. An empty tin can is used as the test object, with a hole pre-drilled in the lower part of the can body; S2. Place the tin can in the annular positioning seat of the loading station. Start the first vacuum pump and use the annular adsorption chamber and adsorption holes to adsorb and fix the outer wall of the can, thus completing the positioning and clamping of the tin can. Then, start the horizontal rotary drive to drive the turntable to rotate and transfer the positioned tin can to the airtightness testing station. S3. The anti-collapse mechanism is activated. The first lifting push rod drives the support plate, inner adsorption ring, and outer adsorption ring to descend, so that the inner adsorption ring fits the inner area of ​​the annular groove line on the can cover, and the outer adsorption ring fits the outer area of ​​the annular groove line. The second vacuum pump is activated, and pre-adsorption support is applied to the corresponding area of ​​the can cover through the adsorption channel. Immediately afterwards, two horizontal worm gear screw lifts are activated simultaneously, driving the two semi-circular covers to approach and dock with each other. The upper half-shaft sleeve seals with the air guide shaft, and the lower half-shaft sleeve seals with the outer wall of the can body. The sealing end plate achieves the sealing of the docking surface of the two semi-circular covers, forming a sealed cavity covering the double hook edge structure. Then, the third vacuum pump is activated to evacuate the sealed cavity. The first pressure sensor detects the pressure value in the sealed cavity in real time and transmits the data to the controller. The controller judges whether the air tightness of the double hook edge structure is qualified based on the pressure value change. After the test is completed, the anti-collapse mechanism and the air tightness detection mechanism are reset, the turntable continues to rotate, and the tin can is transferred to the dynamic load pressure resistance and opening force detection station. S4. When dynamic load pressure test is selected, the steering drive motor starts, driving the rotating plate to rotate, so that the dynamic load pressure test mechanism is aligned with the inner area of ​​the annular scoring line on the can cover; the vertical rotation drive starts, the angle of the carrier plate is adjusted to a suitable position, the push rod is adjusted to adjust the hammering height of the combined hammer, the mechanical gripper is unlocked, and the combined hammer falls under the action of gravity, impacting the inner area of ​​the annular scoring line on the can cover through the hammer pressure plate to complete the dynamic load pressure test; When the opening force detection is selected, the steering drive motor starts again, driving the rotating plate to rotate, so that the opening force detection mechanism is aligned with the spoon mounting slot of the can lid; the second lifting push rod drives the opening pull head to descend and insert into the spoon mounting slot between the two stops, the flip motor starts, and drives the vertical shaft to rotate through the belt drive, so that the opening pull head rotates 90 degrees and is located below the stops; then the second lifting push rod slowly retracts, driving the opening pull head to pull upward, and the second pressure sensor detects the opening force data in real time during the lifting process and transmits it to the controller.

Images