Electromagnetic valve automatic assembly test method

Abstract

The application discloses a kind of electromagnetic valve automatic assembly test methods, including assembly workstation, test workstation and the conveying line connected between the two;Assembly workstation includes flow transfer frame, tightening mechanism, gasket assembly mechanism, electromagnetic cover assembly mechanism, nut screwing mechanism, steering adjustment mechanism and clamping transfer mechanism;Wherein, tightening mechanism, gasket assembly mechanism, electromagnetic cover assembly mechanism, nut screwing mechanism and steering adjustment mechanism are sequentially arranged along the side of flow transfer frame, and clamping transfer mechanism is arranged on the other side of flow transfer frame;Test workstation includes high-pressure airtight test mechanism one, low-pressure airtight test mechanism, high-pressure airtight test mechanism two sequentially arranged along the conveying direction, and take and place transfer mechanism is arranged above high-pressure airtight test mechanism one, low-pressure airtight test mechanism, high-pressure airtight test mechanism two.The application can complete the automatic assembly of main parts of electromagnetic valve and can test the performance of electromagnetic valve.

Description

[0001] This patent is a divisional application, application number 2025105012770, application date: April 21, 2025. Technical Field

[0002] This invention relates to the field of automated production line technology, specifically to an automatic assembly and testing method for solenoid valves. Background Technology

[0003] Solenoid valves are widely used in various industries as important fluid control components, such as in automotive oil circuit control and in automatic reagent dosing control in chemical processing. The main components of a solenoid valve include the valve core and the valve body. The valve core mainly consists of the valve core, sleeve, magnetic core, and coil. Because solenoid valves involve many components and require high precision, the automated assembly line for solenoid valves needs a high degree of integration. Currently, production equipment used for solenoid valve assembly generally suffers from low efficiency, low concentration, and excessive manual intervention. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an automatic assembly and testing method for solenoid valves, which can automatically assemble the main components of the solenoid valve and perform performance testing on the solenoid valve.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An automatic assembly and testing method for a solenoid valve includes an assembly workstation, a testing workstation, and a conveyor line connecting the two. The assembly workstation includes a conveyor frame, a tightening mechanism, a washer assembly mechanism, a solenoid cover assembly mechanism, a nut screwing mechanism, a steering adjustment mechanism, and a clamping and transferring mechanism. The tightening mechanism, washer assembly mechanism, solenoid cover assembly mechanism, nut screwing mechanism, and steering adjustment mechanism are sequentially arranged along one side of the conveyor frame, and the clamping and transferring mechanism is located on the other side of the conveyor frame. The testing workstation includes a high-pressure airtightness testing mechanism one, a low-pressure airtightness testing mechanism, and a high-pressure airtightness testing mechanism two, sequentially arranged along the conveying direction, and a pick-and-place transfer mechanism is provided above the high-pressure airtightness testing mechanism one, the low-pressure airtightness testing mechanism one, and the high-pressure airtightness testing mechanism two.

[0006] Furthermore, the tightening mechanism includes a tightening mounting frame, the tightening mounting frame is provided with a longitudinal moving module, the moving seat of the longitudinal moving module is provided with a valve stem tightening gun, and the conveying end of the valve stem tightening gun is provided with a valve stem tightening sleeve adapted to the valve stem. The washer assembly mechanism includes a washer assembly mounting frame, the washer assembly mounting frame is provided with a washer pick-and-place moving module, the moving seat of the washer pick-and-place moving module is provided with a washer pick-and-place lifting cylinder, and the output end of the washer pick-and-place lifting cylinder is provided with a washer pneumatic clamp; The electromagnetic cover assembly mechanism includes an electromagnetic cover assembly mounting frame, the electromagnetic cover mounting frame is provided with an electromagnetic cover pick-and-place moving module, the moving seat of the electromagnetic cover pick-and-place moving module is provided with an electromagnetic cover pick-and-place lifting cylinder, and the output end of the electromagnetic cover pick-and-place lifting cylinder is provided with an electromagnetic cover pneumatic clamp; The nut screwing mechanism includes a nut screwing mounting frame, the nut screwing mounting frame is provided with a nut pick-and-place transverse moving module, the moving seat of the nut pick-and-place transverse moving module is provided with a nut pick-and-place longitudinal module, the moving seat of the nut pick-and-place longitudinal module is provided with a nut tightening gun, and the conveying end of the nut tightening gun is provided with a nut tightening sleeve adapted to the nut; the moving seat of the nut pick-and-place transverse moving module is further provided with an extension frame, the extension frame is provided with a stop rod, and the lower end of the stop rod is provided with a nut stop sleeve; Further, the direction adjusting mechanism includes a direction turning pick-and-place lifting cylinder, the direction turning pick-and-place lifting cylinder is arranged on the fixing plate of the nut pick-and-place transverse moving module, the output end of the direction turning pick-and-place lifting cylinder is provided with a rotating motor, and the output end of the rotating motor is provided with a direction turning pneumatic clamp; The clamping and transferring mechanism includes a clamping mounting frame, a clamping X-axis moving module, and a clamping Y-axis moving module; the clamping X-axis moving module is arranged on the clamping mounting frame, the clamping Y-axis moving module is arranged on the moving seat of the clamping X-axis moving module, the moving seat of the clamping Y-axis moving module is provided with a clamping profile, the clamping profile is provided with a plurality of sets of clamping blocks distributed at intervals along its length, the working end of the clamping block is provided with a clamping bayonet, and the clamping bayonet is adapted to the valve body; the end of the clamping profile is provided with a material pushing plate.

[0007] Further, the assembly workstation further includes a valve body conveying line, a washer vibrating plate, an electromagnetic cover conveying line, a nut vibrating plate, a nut ejecting mechanism supporting the nut vibrating plate, a material pushing and conveying mechanism, and a plurality of sets of positioning cylinders cooperating with the clamping and transferring mechanism; the valve body conveying line is arranged on one side of the input end of the flow conveying frame, the washer vibrating plate is arranged on one side of the washer assembly mechanism, the electromagnetic cover conveying line is arranged on one side of the electromagnetic cover assembly mechanism, the nut vibrating plate is arranged on one side of the nut screwing mechanism, the material pushing and conveying mechanism is arranged between the input end of the flow conveying frame and the output end of the valve body conveying line, the plurality of sets of positioning cylinders are arranged at intervals along the flow conveying frame and located on the opposite side of the clamping and transferring mechanism; The nut ejection mechanism includes a nut ejection mounting plate, which is located on one side of the conveyor frame. A positioning seat is located on the rear side of the mounting plate. The upper part of the positioning seat has a groove communicating with the linear conveying track of the nut vibratory plate. A through hole is provided in the groove, penetrating the entire positioning seat. A T-shaped ejector block is located within the through hole. A lever is also located on the rear side of the mounting plate. The lever is rotatably connected to the mounting plate via a rotating shaft. Rollers are located at both ends of the lever. One roller abuts against the bottom of the T-shaped ejector block, and the other roller abuts against the output end of the ejector cylinder. A ejector block is located at the output end of the ejector cylinder, which is mounted on the nut ejection mounting plate. A nut pneumatic clamp is located on the front side of the mounting plate. The clamping port of the nut pneumatic clamp is located above the nut ejection outlet, and the nut is clamped and fixed through the clamping port of the nut pneumatic clamp. The feeding mechanism includes a feeding mounting frame, the feeding mounting frame is equipped with a feeding cylinder, and the feeding end of the feeding cylinder is equipped with a feeding block; The output end of the positioning cylinder is equipped with a positioning shaft, and the working end of the positioning shaft passes through the side plate of the water conveyor frame, cooperating with the clamping block to position the valve body.

[0008] Furthermore, the conveyor line is equipped with a corner pusher cylinder, an oil level testing mechanism, and a conveying stop mechanism; the output end of the corner pusher cylinder is equipped with a corner pusher block; The oil quantity testing mechanism includes testing components symmetrically arranged on both sides of the conveyor line, and a positioning stop component arranged in the forward direction of the conveyor line; the testing components include a testing mounting frame, the testing mounting frame is provided with a testing module, and a pneumatic mechanism for moving the testing module forward, the working surface of the testing module is provided with a testing shaft connected to the valve body pipeline; the positioning stop component includes a stop mounting frame, the stop mounting frame is provided with a stop cylinder, and the output end of the stop cylinder is provided with a stop block; The conveying stop mechanism includes a first conveying stop mechanism located before the oil quantity testing mechanism and a second conveying stop mechanism located before the high pressure air tightness testing mechanism. The conveying stop mechanism includes a conveying stop cylinder, and the output end of the conveying stop cylinder is provided with a conveying stop rod.

[0009] Furthermore, both the high-pressure airtightness testing mechanism one and the high-pressure airtightness testing mechanism two include a high-pressure testing mounting frame. A high-pressure testing transverse movement module is mounted on the upper part of the high-pressure testing mounting frame. The moving slide rail of the high-pressure testing transverse movement module is equipped with two sets of moving seats I. One moving seat I is equipped with a solenoid valve mounting fixture I, and the other moving seat I is equipped with the high-pressure testing module. The solenoid valve mounting fixture I has a solenoid valve placement position. The working surface of the high-pressure testing module is equipped with a high-pressure airtightness testing shaft I connected to the solenoid valve pipeline. The side of the high-pressure testing mounting frame... The unit is equipped with an air source mounting plate I, which has a high-pressure airtightness testing shaft II. The working end of the high-pressure airtightness testing shaft II passes through the air source mounting plate I and extends into the solenoid valve placement position, working together with the high-pressure airtightness testing shaft I to perform high-pressure airtightness testing on the solenoid valve. A retractable linkage structure I is also provided, which connects the air source mounting plate I, the solenoid valve mounting fixture I, and the side of the high-pressure testing module. Driven by the driving mechanism of the high-pressure testing transverse module, the solenoid valve mounting fixture I and the high-pressure testing module move synchronously in the same direction.

[0010] Furthermore, the low-pressure airtightness testing mechanism includes a low-pressure testing mounting frame. A low-pressure testing transverse movement module is mounted on the upper part of the mounting frame. The transverse movement module has two sets of movable seats II on its sliding rails. One movable seat II is equipped with a solenoid valve mounting fixture II, and the other movable seat II is equipped with the low-pressure testing module. The solenoid valve mounting fixture II has a solenoid valve placement position. The working surface of the low-pressure testing module has a low-pressure airtightness testing shaft I connected to the solenoid valve pipeline. An air source is located on the side of the low-pressure testing mounting frame. Mounting plate II, the air source mounting plate II is equipped with a low-pressure airtightness test shaft II, the working end of the low-pressure airtightness test shaft II passes through the air source mounting plate II and extends into the solenoid valve placement position, and works together with the low-pressure airtightness test shaft I to perform low-pressure airtightness testing on the solenoid valve; a retractable linkage structure II is provided, the retractable linkage structure II is respectively connected to the side of the air source mounting plate II, the solenoid valve mounting fixture II, and the low-pressure test module, and driven by the drive mechanism of the low-pressure test transverse module, the solenoid valve mounting fixture II and the low-pressure test module move synchronously in the same direction.

[0011] Furthermore, the pick-and-place transfer mechanism includes a pick-and-place transfer mounting frame, a pick-and-place X-axis moving module, and a pick-and-place Y-axis moving module; the pick-and-place transfer mounting frame is mounted on the moving seat of the pick-and-place Y-axis moving module, the pick-and-place X-axis moving module is mounted on the pick-and-place transfer mounting frame, the moving seat of the pick-and-place X-axis moving module is provided with a pick-and-place profile, and the pick-and-place profile is provided with pick-and-place transfer component one, pick-and-place transfer component two, and pick-and-place transfer component three at intervals along its length; The pick-and-place transfer assembly includes a pick-and-place mounting plate. The pick-and-place mounting plate is provided with multiple independently operating Z-axis moving modules. Each Z-axis moving module is provided with a pick-and-place assembly. The pick-and-place assembly includes a pick-and-place cylinder on the moving seat of the Z-axis moving module. The output end of the pick-and-place cylinder is provided with a pneumatic clamp. The second pick-and-place transfer component includes a second pick-and-place mounting plate, the second pick-and-place mounting plate is provided with a plurality of second pick-and-place components, the second pick-and-place component includes a second pick-and-place cylinder provided on the second pick-and-place mounting plate, and the output end of the second pick-and-place cylinder is provided with a second pneumatic clamp; The pick-and-place transfer assembly three includes a pick-and-place mounting plate three, which is provided with a lateral moving module and a rotating module. The lateral moving module has a rack on its moving seat. The rotating module includes a rotating mounting seat on the pick-and-place mounting plate three. The rotating mounting seat has multiple rotating components. Each rotating component includes a rotating rod. The upper end of the rotating rod has a gear that meshes with the rack. The lower end of the rotating rod has a connecting block. The connecting block has a pick-and-place cylinder three. The output end of the pick-and-place cylinder three has a pneumatic clamp three.

[0012] Furthermore, the high-pressure airtightness testing mechanism 1, the low-pressure airtightness testing mechanism 2, and the high-pressure airtightness testing mechanism 2 are all equipped with defective product rejection slides and corresponding defective product collection boxes for each slide.

[0013] An automatic assembly and testing method for a solenoid valve includes the following steps: S1: The valve stem is pre-assembled onto the valve body, and the valve body is transported to the input end of the flow conveyor frame via the valve body conveyor line. The pushing cylinder of the pushing mechanism drives the pushing block to push the valve body into the flow conveyor frame. S2: The clamping and transfer mechanism grabs the valve body through the clamping slot of the clamping block and transfers it to the tightening mechanism. The longitudinal moving module drives the valve stem tightening gun to press down, and the valve stem tightening sleeve tightens the valve stem. S3: The washer vibratory feeder transports the washer to the washer assembly mechanism. The washer pick-up and place moving module drives the washer pneumatic clamp to grab the washer. The washer is then assembled to the valve body and valve stem position by the washer pick-up and place lifting cylinder. S4: The electromagnetic cover conveyor line transports the electromagnetic cover to the electromagnetic cover assembly mechanism. The electromagnetic cover picking and placing moving module drives the electromagnetic cover pneumatic clamp to grab the electromagnetic cover, and the lifting cylinder presses the electromagnetic cover onto the valve body. S5: The nut vibratory plate, together with the nut ejection mechanism, sends the nut to the clamping port of the nut pneumatic clamp. The nut tightening gun adjusts its position through the horizontal and vertical modules. The nut tightening sleeve screws the nut into the valve body solenoid cover position. S6: The steering and lifting cylinder drives the rotary motor to descend, the steering pneumatic clamp grabs the solenoid valve, the rotary motor drives the valve body to rotate to the required test direction, and places it on the return water conveyor rack. S7: Driven by the clamping and transfer mechanism, the pusher plate pushes the solenoid valve that has completed the direction change away from the water conveyor frame and falls into the conveyor line. S8: The corner pusher cylinder drives the corner pusher block to push the solenoid valve to the direction of the oil quantity test mechanism; S9: The stop cylinder of the positioning stop assembly extends the stop block to fix the position of the solenoid valve. The pneumatic mechanism of the test assembly drives the test module to move forward, and the test shaft is connected to the solenoid valve pipeline to perform oil quantity testing. The conveying stop mechanism controls the solenoid valve in an orderly manner through the stop rod to enter the oil quantity test and high pressure air tightness test. S10: The pick-and-place transfer assembly grabs the incoming solenoid valve through the pneumatic clamp and places it in the solenoid valve mounting fixture of the high-pressure airtightness testing mechanism. The high-pressure test transverse shift module drives the high-pressure airtightness testing shaft one to cooperate with the high-pressure airtightness testing shaft two to complete the high-pressure airtightness test. S11: The second pick-and-place transfer component transfers the solenoid valve that has completed step S10 to the second solenoid valve mounting fixture of the low-pressure airtightness testing mechanism through the second pneumatic clamp. The low-pressure test transverse movement module drives the first low-pressure airtightness test shaft to cooperate with the second low-pressure airtightness test shaft to complete the low-pressure airtightness test. S12: The second pick-up and transfer component will transfer the solenoid valve that has completed step S11 to the second high-pressure airtightness testing mechanism, repeat the high-pressure testing process, and ensure dual high-pressure testing coverage. S13: The pick-and-place transfer assembly three picks up the solenoid valve that has completed step S12, and drives the rack and pinion gear through the lateral movement module, and the rotating rod adjusts the angle of the solenoid valve. The pneumatic clamp three then transfers the qualified product to the packaging line.

[0014] Compared with the prior art, the present invention has the following advantages: by connecting the assembly workstation and the testing workstation in series, the entire "assembly-testing" process is automated, eliminating the efficiency loss caused by manual handling; the assembly workstation adopts a single-sided multi-station collaborative layout, with five major assembly mechanisms arranged linearly along one side of the conveyor belt, and combined with the clamping and transfer mechanism for cross-sectional pick-and-place operations, reducing the material turnover path; the testing workstation adopts a high-pressure-low-pressure-high-pressure three-level airtightness testing series design, combined with the pick-and-place transfer mechanism for cross-sectional pick-and-place operations, improving the testing efficiency to 99.8%. Attached Figure Description

[0015] Figure 1 The diagram shown is a 3D structural diagram of an automated assembly and testing production line for solenoid valves. Figure 2 The diagram shows the internal structure of the assembly workstation and the test workstation. Figure 3 The diagram shown is a structural diagram of the assembly workstation's actuator. Figure 4 The diagram shown is a structural diagram of the tightening mechanism; Figure 5 The diagram shown is a structural diagram of the washer assembly mechanism; Figure 6 The diagram shown is a structural diagram of the electromagnetic cover assembly mechanism. Figure 7 The diagram shown is a structural diagram of the nut-screwing mechanism. Figure 8 The diagram shown is a structural diagram of the steering adjustment mechanism; Figure 9 The diagram shown is a structural diagram of the clamping and transferring mechanism; Figure 10 The diagram shown is a structural diagram of the assembly workstation's actuators and material conveyor line. Figure 11 The diagram shown is a structural diagram of the nut ejection mechanism; Figure 12 The diagram shown is a structural diagram of the nut ejection mechanism; Figure 13 The diagram shown is a structural diagram of the feeding mechanism; Figure 14 The diagram shown is of the positioning cylinder structure. Figure 15 The diagram shown is a structural diagram of a corner-pushing cylinder. Figure 16 The diagram shows the structure of the conveyor line, oil quantity testing mechanism, and conveyor stop mechanism. Figure 17 The diagram shown is a structural diagram of the test workstation's actuator. Figure 18 The diagram shows the structure of high-pressure airtightness testing mechanism one and high-pressure airtightness testing mechanism two. Figure 19 The diagram shown is a structural diagram of a low-pressure airtightness testing mechanism. Figure 20 The diagram shown is a structural diagram of the pick-and-place transfer mechanism; Figure 21 The diagram shown is a structural diagram of the pick-and-place transfer component. Figure 22 The diagram shown is a structural diagram of the pick-and-place transfer component two; Figure 23 The diagram shown is a three-part structure diagram of the pick-and-place transfer component.

[0016] In the diagram: 1. Assembly workstation; 3. Testing workstation; 4. Conveyor line; 11. Flow conveyor; 12. Tightening mechanism; 13. Washer assembly mechanism; 14. Electromagnetic cover assembly mechanism; 15. Nut tightening mechanism; 16. Steering adjustment mechanism; 17. Clamping and transfer mechanism; 18. Valve body conveyor line; 19. Washer vibratory feeder; 20. Electromagnetic cover conveyor line; 21. Nut vibratory feeder; 22. Nut ejection mechanism; 23. Pushing mechanism; 24. Positioning cylinder; 31a. High-pressure airtightness testing mechanism one; 32. Low-pressure airtightness testing mechanism; 31b. High-pressure airtightness testing mechanism two; 33. Picking and placing transfer mechanism; 34. Defective product rejection slide plate; 35. Defective product collection box; 41. Corner pushing cylinder; 42. Oil level testing mechanism ; 43a. Conveyor Stop Mechanism 1; 43b. Conveyor Stop Mechanism 2; 121. Tightening Mounting Frame; 122. Longitudinal Movement Module; 123. Valve Stem Tightening Gun; 124. Valve Stem Tightening Sleeve; 131. Washer Assembly Mounting Frame; 132. Washer Picking and Placing Movement Module; 133. Washer Picking and Placing Lifting Cylinder; 134. Washer Pneumatic Clamp; 141. Electromagnetic Cover Assembly Mounting Frame; 142. Electromagnetic Cover Picking and Placing Movement Module; 143. Electromagnetic Cover Picking and Placing Lifting Cylinder; 144. Electromagnetic Cover Pneumatic Clamp; 151. Nut Insertion Mounting Frame; 152. Nut Picking and Placing Lateral Movement Module; 153. Nut Tightening Gun; 154. Nut Tightening Sleeve; 155. Extension Frame; 156. Stop Rod; 157. Nut Stop Sleeve; 161. Steering Picking and Placing Lifting 162. Cylinder; 163. Rotary motor; 174. Steering pneumatic clamp; 175. Clamping mounting bracket; 176. Clamping X-axis moving module; 177. Clamping Y-axis moving module; 178. Clamping profile; 179. Clamping block; 170. Clamping bayonet; 171. Push plate; 222. Nut ejection mounting plate; 222. Positioning seat; 2221. Groove; 2222. Through hole; 223. T-shaped ejector block; 224. Lever; 225. Rotating shaft; 226. Roller; 227. Ejector cylinder; 228. Ejector block; 229. Nut pneumatic clamp; 231. Push mounting bracket; 232. Push cylinder; 233. Push block; 241. Positioning shaft; 312. High-pressure test mounting bracket; 313. High-pressure test transverse movement module; 314. 3. Moving base I; 314. Solenoid valve mounting fixture I; 315. High-pressure test module; 316. High-pressure airtightness test shaft I; 317. Air source mounting plate I; 318. High-pressure airtightness test shaft II; 319. Retractable linkage structure I; 321. Low-pressure test mounting frame; 322. Low-pressure test transverse movement module; 323. Moving base II; 324. Solenoid valve mounting fixture II; 325. Low-pressure test module; 326. Low-pressure airtightness test shaft I; 327. Air source mounting plate II; 328. Low-pressure airtightness test shaft II; 329. Retractable linkage structure II; 331. Pick-up and transfer mounting frame; 332a. Pick-up and transfer X-axis moving module; 332b. Pick-up and transfer Y-axis moving module; 333. Pick-up and transfer profile; 334. Pick-up and transfer assembly I;335a. Pick-up and Placement Transfer Component Two; 335b. Pick-up and Placement Transfer Component Two; 336. Pick-up and Placement Transfer Component Three; 3341. Pick-up and Placement Mounting Plate One; 3342. Z-Axis Moving Module; 3343a. Pick-up and Placement Cylinder One; 3343b. Pneumatic Clamp One; 3351. Pick-up and Placement Mounting Plate Two; 3352. Pick-up and Placement Cylinder Two; 3353. Pneumatic Clamp Two; 3361. Pick-up and Placement Mounting Plate Three; 3362. Lateral Moving Module; 3363. Rotating Module; 3 364. Rack; 3365. Rotary mounting base; 3366. Rotating rod; 3367. Gear; 3368. Connecting block; 3369. Pick-and-place cylinder three; 3370. Pneumatic clamp three; 421. Test assembly; 422. Positioning stop assembly; 4211. Test mounting bracket; 4212. Test module; 4213. Pneumatic mechanism; 4214. Test shaft; 4221. Stop mounting bracket; 4222. Stop cylinder; 4223. Stop block. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1-23As shown, the present invention provides a technical solution: an automatic assembly and testing method for a solenoid valve, comprising an assembly workstation 1, a testing workstation 3, and a conveyor line 4 connecting the two; the assembly workstation 1 includes a conveyor frame 11, a tightening mechanism 12, a washer assembly mechanism 13, an electromagnetic cover assembly mechanism 14, a nut screwing mechanism 15, a steering adjustment mechanism 16, and a clamping and transfer mechanism 17; wherein, the tightening mechanism 12, the washer assembly mechanism 13, the electromagnetic cover assembly mechanism 14, the nut screwing mechanism 15, and the steering adjustment mechanism 16 are arranged sequentially along one side of the conveyor frame 11, and the clamping and transfer mechanism 17 is located on the other side of the conveyor frame 11; the testing workstation 3 includes a high-pressure airtightness testing mechanism 31a, a low-pressure airtightness testing mechanism 32, and a high-pressure airtightness testing mechanism 31b arranged sequentially along the conveying direction, and a pick-and-place transfer mechanism 33 is provided above the high-pressure airtightness testing mechanism 31a, the low-pressure airtightness testing mechanism 32, and the high-pressure airtightness testing mechanism 31b. By connecting assembly workstation 1 and testing workstation 4 in series, the entire assembly-testing process is automated, eliminating efficiency losses caused by manual handling. The assembly workstation adopts a single-sided multi-station collaborative layout, with five major assembly mechanisms arranged linearly along one side of the conveyor belt. Combined with the gripping and transfer mechanism, it performs cross-sectional pick-and-place operations, reducing material turnover paths and significantly improving assembly efficiency. The testing workstation adopts a high-pressure-low-pressure-high-pressure three-level airtightness testing series design, combined with the pick-and-place transfer mechanism 33, which performs cross-sectional pick-and-place operations, significantly improving testing efficiency.

[0019] Please see Figure 4 As shown, the tightening mechanism 12 includes a tightening mounting frame 121, which is equipped with a longitudinal moving module 122. A valve stem tightening gun 123 is mounted on the moving seat of the longitudinal moving module 122, and a valve stem tightening sleeve 124 adapted to the valve stem is mounted on the conveying end of the valve stem tightening gun 123. The tightening mechanism 12 enables continuous tightening and assembly of the valve stem and valve body, while avoiding deviations in tightening and assembly caused by human operation, significantly improving assembly quality and efficiency. The longitudinal moving module 122 uses a high-precision linear guide and a servo motor / pneumatic drive to ensure the coaxiality of the valve stem tightening gun 123 with the valve body axis during its downward movement.

[0020] Please see Figure 5As shown, the washer assembly mechanism 13 includes a washer assembly mounting frame 131, which is equipped with a washer pick-and-place moving module 132. The moving seat of the washer pick-and-place moving module 132 is equipped with a washer pick-and-place lifting cylinder 133, and the output end of the washer pick-and-place lifting cylinder 133 is equipped with a washer pneumatic clamp 134. The washer assembly mechanism 13 significantly improves the quality and efficiency of washer assembly through modular design and precision motion control. The washer pick-and-place moving module 132 adopts a high-precision ball screw driven by a servo motor / pneumatic drive, and the washer pneumatic clamp 134 adopts a split-type contour gripper with an embedded silicone buffer layer, which is compatible with electromagnetic covers with different surface finishes and has a gripping success rate of >99.9%. By assembling the washer mechanically, continuous operation is achieved and positioning accuracy is guaranteed, solving the coaxiality deviation problem of traditional manual assembly.

[0021] Please see Figure 6 As shown, the electromagnetic cover assembly mechanism 14 includes an electromagnetic cover assembly mounting frame 141, an electromagnetic cover picking and placing moving module 142, an electromagnetic cover picking and placing lifting cylinder 143 on the moving seat of the electromagnetic cover picking and placing moving module 142, and an electromagnetic cover pneumatic clamp 144 at the output end of the electromagnetic cover picking and placing lifting cylinder 143. The electromagnetic cover assembly mechanism 14 significantly improves the quality and efficiency of electromagnetic cover assembly through modular design and precision motion control. The electromagnetic cover picking and placing moving module 142 adopts a high-precision ball screw driven by a servo motor / pneumatic. The electromagnetic cover pneumatic clamp 144 adopts a split-type contour gripper with an embedded silicone buffer layer, which is suitable for electromagnetic covers with different surface finishes and has a gripping success rate of >99.9%. By assembling electromagnetic covers mechanically, continuous operation is achieved while ensuring positioning accuracy, solving the problem of low efficiency in traditional manual assembly.

[0022] Please see Figure 7As shown, the screwing-in nut mechanism 15 includes a screwing-in nut mounting bracket 151, which is equipped with a nut picking and placing transverse module 152. The movable seat of the nut picking and placing transverse module 152 is equipped with a nut picking and placing longitudinal module 152. The movable seat of the nut picking and placing longitudinal module 152 is equipped with a nut tightening gun 153. The conveying end of the nut tightening gun 153 is equipped with a nut tightening sleeve 154 that is compatible with the nut. The movable seat of the nut picking and placing transverse module 152 is also equipped with an extension frame 155. The extension frame 155 is equipped with a stop bar 156. The lower end of the stop bar 156 is equipped with a nut stop sleeve 157. The nut-screwing mechanism 15, through modular design and precision motion control, significantly improves the quality and efficiency of nut assembly onto the electromagnetic cover. The nut pick-and-place horizontal movement module 152 and the nut pick-and-place vertical movement module 152 utilize high-precision linear guides and servo motors / pneumatic drives to achieve rapid nut pick-and-place operations while ensuring precise nut placement onto the electromagnetic cover. The tightening gun 153 integrates a high-resolution torque sensor and a rotary encoder to achieve synchronous torque-angle control, with torque fluctuation <±1%, compared to ±5% for traditional electric wrenches. Mechanized nut assembly enables continuous operation and ensures screwing accuracy, solving the problem of low efficiency associated with traditional manual assembly.

[0023] Please see Figure 8 As shown, the steering adjustment mechanism 16 includes a steering pick-and-place lifting cylinder 161, which is mounted on the fixing plate 158 of the nut pick-and-place lateral movement module 152. A rotary motor 162 is installed at the output end of the steering pick-and-place lifting cylinder 161, and a steering pneumatic clamp 163 is installed at the output end of the rotary motor 162. The steering pick-and-place lifting cylinder 161 and the rotary motor 162 work together to achieve high-precision attitude adjustment of the solenoid valve.

[0024] Please see Figure 9As shown, the clamping and transfer mechanism 17 includes a clamping mounting frame 171, a clamping X-axis moving module 172, and a clamping Y-axis moving module 173. The clamping X-axis moving module 172 is mounted on the clamping mounting frame 171, and the clamping Y-axis moving module 173 is mounted on the moving seat of the clamping X-axis moving module 172. The moving seat of the clamping Y-axis moving module 173 is provided with a clamping profile 174. The clamping profile 174 is provided with multiple sets of spaced clamping blocks 175 along its length. The working end of the clamping block 175 is provided with a clamping slot 1751, which is adapted to the valve body. The end of the clamping profile 174 is provided with a pusher plate 176. The clamping X-axis moving module 172 and clamping Y-axis moving module 173 adopt high-precision linear guides and servo motors / pneumatic drives to achieve nanometer-level trajectory planning for valve body transfer paths. Five sets of clamping blocks 175 are evenly distributed on the clamping profile 174, which can clamp five valve bodies at the same time. The spacing is adjustable from 50 to 200 mm, ensuring synchronous transfer of multiple workpieces and greatly improving efficiency. The pusher plate 176 is linked with the pick-up and put-down action of the clamping blocks 175. Through the lateral movement of the clamping X-axis moving module 172, the processed valve body is accurately pushed into the conveyor line, avoiding the cycle time caused by manual intervention. There is no need to add a pusher plate drive mechanism. By linking with the pick-up and put-down action, the solenoid valve that has completed the attitude adjustment can be pushed away, realizing automated unloading and eliminating the bottleneck of manual intervention.

[0025] Please see Figure 10 As shown, the assembly workstation 1 also includes a valve body conveyor line 18, a washer vibratory feeder 19, an electromagnetic cover conveyor line 20, a nut vibratory feeder 21, a nut ejection mechanism 22 and a pushing mechanism 23 that are matched with the nut vibratory feeder 21, and multiple sets of positioning cylinders 24 that cooperate with the clamping and transfer mechanism 17. The valve body conveyor line 18 is located on one side of the input end of the flow conveyor frame 11, the washer vibratory feeder 19 is located on one side of the washer assembly mechanism 13, the electromagnetic cover conveyor line 20 is located on one side of the electromagnetic cover assembly mechanism 14, the nut vibratory feeder 21 is located on one side of the nut screwing mechanism 15, the pushing mechanism 23 is located between the input end of the flow conveyor frame 11 and the output end of the valve body conveyor line 18, and multiple sets of positioning cylinders 24 are spaced along the flow conveyor frame 11 and located on the opposite side of the clamping and transfer mechanism 17. Multiple positioning cylinders 24 cooperate with clamping blocks 175 on the clamping and transfer mechanism 17 to position the valve body. When the valve body completes the current process, the positioning shafts of the multiple positioning cylinders 24 retract, and the valve body is transferred by the clamping blocks 175. The positioning cylinders 24 and clamping blocks 175 are linked to form a bidirectional clamping force field during valve body processing, suppressing displacement caused by vibration. The valve body conveyor line 18, washer vibratory feeder 19, electromagnetic cover conveyor line 20, and nut vibratory feeder 21 adopt a distributed layout and are uniformly scheduled by PLC to achieve synchronous feeding of multiple materials.

[0026] Please see Figure 11-12As shown, the nut ejection mechanism 22 includes a nut ejection mounting plate 221, which is located on one side of the conveyor frame 11. A positioning seat 222 is provided on the rear side of the nut ejection mounting plate 221. The upper part of the positioning seat 222 has a groove 2221 that communicates with the linear conveying track of the nut vibrating plate 21. A through hole 2222 penetrating the entire positioning seat 222 is provided in the groove 2221. A T-shaped ejector block 223 is provided in the through hole 2222. A lever 224 is also provided on the rear side of the nut ejection mounting plate 221. The lever 224 is rotatably connected to the [unclear - possibly a component or component] via a rotating shaft 225. On the nut ejection mounting plate 221, both ends of the lever 224 are equipped with rollers 226. One roller 226 of the lever 224 abuts against the bottom of the T-shaped ejector block 223, and the other roller 226 abuts against the output end of the ejector cylinder 227. The output end of the ejector cylinder 227 is equipped with a top block 228. The ejector cylinder 227 is mounted on the nut ejection mounting plate 221. A nut pneumatic clamp 229 is provided on the front side of the nut ejection mounting plate 221. The clamping port of the nut pneumatic clamp 229 is located above the nut ejection outlet, and the nut is clamped and fixed through the clamping port of the nut pneumatic clamp 229. The positioning seat 222 and the groove 2221 guide the nut from the vibratory plate into the predetermined position. The T-shaped ejector block 223 in the through hole 2222 is driven out by the lever mechanism. The lever 224 has rollers at both ends, which contact the T-shaped ejector block 223 and the ejector block 228 respectively. This design is used to amplify the stroke or force of the cylinder to achieve more precise control. The ejector cylinder 227 pushes the lever through the ejector block 228, which in turn drives the T-shaped ejector block 223 to eject the nut. The nut stop sleeve 157 prevents the nut from being pushed away from the groove 2221, ensuring the stability of the nut during ejection. Then, the nut is clamped and fixed by the clamping port of the nut pneumatic clamp 229, so that the nut tightening gun 153 on the nut tightening mechanism 15 can quickly and accurately screw the nut in.

[0027] Please see Figure 13 As shown, the feeding mechanism 23 includes a feeding mounting frame 231, a feeding cylinder 232 is provided on the feeding mounting frame 231, and a feeding block 233 is provided on the conveying end of the feeding cylinder 232; the feeding mechanism 23 is used to push the valve body into the water conveyor frame 11.

[0028] Please see Figure 14 As shown, the output end of the positioning cylinder 24 is equipped with a positioning shaft 241. The working end of the positioning shaft 241 passes through the side plate of the flow conveyor frame 11 and cooperates with the clamping block 175 to position the valve body. When the valve body completes the current process, the positioning shafts 241 of the multiple positioning cylinders 24 retract. Please see Figure 15-16 As shown, the conveyor line 4 is equipped with a corner pusher cylinder 41, an oil quantity testing mechanism 42, and a conveyor stop mechanism; the output end of the corner pusher cylinder 41 is equipped with a corner pusher block 411. The oil quantity testing mechanism 42 includes testing components 421 symmetrically arranged on both sides of the conveyor line 4, and a positioning stop component 422 arranged in the forward direction of the conveyor line 4. The testing components 421 include a testing mounting frame 4211, on which a testing module 4212 is mounted, and a pneumatic mechanism 4213 for moving the testing module 4212 forward. The working surface of the testing module 4212 is provided with a testing shaft 4214 connected to the valve body pipeline. The positioning stop component 422 includes a stop mounting frame 4221, on which a stop cylinder 4222 is mounted, and a stop block 4223 is provided at the output end of the stop cylinder 4222. The two testing components 421 synchronously drive the testing shaft 4214 through the pneumatic mechanism 4213 to apply symmetrical pressure, eliminating valve body deformation caused by unilateral testing. The testing module 4212 integrates a pressure sensor to provide real-time feedback of oil pressure data and trigger dynamic adjustment of the pneumatic pressure. The stop block 4223 is used to stop and position the solenoid valve, ensuring the stability and accuracy of the oil quantity test.

[0029] The conveying stop mechanism includes a first conveying stop mechanism 43a located before the oil quantity testing mechanism 42 and a second conveying stop mechanism 43b located before the high-pressure airtightness testing mechanism 31. Conveying stop mechanisms 43a and 43b include a conveying stop cylinder 431, and a conveying stop rod 432 is provided at the output end of the conveying stop cylinder 431. By setting up the first conveying stop mechanism 43a and the second conveying stop mechanism 43b, the solenoid valves are ensured to enter the corresponding mechanisms for testing in an orderly manner.

[0030] Please see Figure 17-19As shown, both the high-pressure airtightness testing mechanism 31a and the high-pressure airtightness testing mechanism 31b include a high-pressure testing mounting frame 311. A high-pressure testing transverse movement module 312 is mounted on the upper part of the high-pressure testing mounting frame 311. The moving slide rail of the high-pressure testing transverse movement module 312 is equipped with two sets of moving seats I 313. One moving seat I 313 is equipped with a solenoid valve mounting fixture I 314, and the other moving seat I 313 is equipped with a high-pressure testing module 315. The solenoid valve mounting fixture I 314 has a solenoid valve placement position. The working surface of the high-pressure testing module 315 is equipped with a high-pressure airtightness testing shaft I 316 connected to the solenoid valve pipeline. The side of the high-pressure testing mounting frame 311 is equipped with... The system includes a gas source mounting plate I 317, which is equipped with a high-pressure airtightness testing shaft II 318. The working end of the high-pressure airtightness testing shaft II 318 passes through the gas source mounting plate I 317 and extends into the solenoid valve placement position, working in conjunction with the high-pressure airtightness testing shaft I 316 to perform high-pressure airtightness testing on the solenoid valve. A retractable linkage structure I 319 is also included, connecting the sides of the gas source mounting plate I 317, the solenoid valve mounting fixture I 314, and the high-pressure testing module 315. Driven by the driving mechanism of the high-pressure testing transverse module 312, the solenoid valve mounting fixture I 314 and the high-pressure testing module 315 move synchronously in the same direction. The high-pressure airtightness testing shaft I 316 and the high-pressure airtightness testing shaft II 318 simultaneously apply high-pressure gas from the input / output ends of the solenoid valve, forming a closed-loop pressure field to eliminate micro-leakage at the sealing surface caused by unilateral pressure application. By rigidly connecting the solenoid valve mounting fixture 314 and the high-pressure test module 315 with a retractable linkage structure I319, synchronous and unified directional movement of the two stations is achieved under the drive mechanism of the transverse module 312. The high-pressure test module 315 integrates a pressure sensor, a flow meter, and a temperature compensation module, and synchronously collects data on pressure attenuation, leakage flow, and temperature drift.

[0031] Please see Figure 20As shown, the low-pressure airtightness testing mechanism 32 includes a low-pressure testing mounting frame 321. A low-pressure testing transverse movement module 322 is mounted on the upper part of the low-pressure testing mounting frame 321. Two sets of movable seats II 323 are mounted on the sliding rails of the low-pressure testing transverse movement module 322. One movable seat II 323 is equipped with a solenoid valve mounting fixture II 324, and the other movable seat II 323 is equipped with a low-pressure testing module 325. The solenoid valve mounting fixture II 324 has a solenoid valve placement position. A low-pressure airtightness testing shaft I 326, connected to the solenoid valve pipeline, is mounted on the working surface of the low-pressure testing module 325. An air source mounting plate II 3 is mounted on the side of the low-pressure testing mounting frame 321. 27. The gas source mounting plate II 327 is equipped with a low-pressure airtightness test shaft II 328. The working end of the low-pressure airtightness test shaft II 328 passes through the gas source mounting plate II 327 and extends into the solenoid valve placement position. It works in conjunction with the low-pressure airtightness test shaft I 326 to perform low-pressure airtightness testing on the solenoid valve. A retractable linkage structure II 329 is provided, which connects to the sides of the gas source mounting plate II 327, the solenoid valve mounting fixture II 324, and the low-pressure test module 325. Driven by the drive mechanism of the low-pressure test transverse module 322, the solenoid valve mounting fixture II 324 and the low-pressure test module 325 move synchronously in the same direction. The low-pressure airtightness test shaft I 326 and the low-pressure airtightness test shaft II 328 apply low-pressure gas synchronously from the inlet and outlet of the solenoid valve, forming a bidirectional balanced pressure field for accurate testing of micro-leakage. The low-pressure test module 325 integrates a micro-pressure sensor, a mass spectrometer interface, and a humidity compensation module, simultaneously analyzing the effects of pressure decay, gas composition, and humidity. The moving modules on the high-pressure airtightness test mechanism 31a, the low-pressure airtightness test mechanism 32, and the high-pressure airtightness test mechanism 31b employ high-precision linear guides and servo motors / pneumatic drives.

[0032] Please see Figure 21 As shown, the pick-and-place transfer mechanism 33 includes a pick-and-place transfer mounting frame 331, a pick-and-place X-axis moving module 332a, and a pick-and-place Y-axis moving module 332b. The pick-and-place transfer mounting frame 331 is mounted on the moving seat of the pick-and-place Y-axis moving module 332b, and the pick-and-place X-axis moving module 332a is mounted on the pick-and-place transfer mounting frame 331. The moving seat of the pick-and-place X-axis moving module 332a is provided with a pick-and-place profile 333. The pick-and-place profile 333 is provided with pick-and-place transfer component one 334, pick-and-place transfer component two (335a, 335b), and pick-and-place transfer component three 336 at intervals along its length. Please see Figure 22As shown, the pick-and-place transfer assembly 334 includes a pick-and-place mounting plate 3341. The mounting plate 3341 is equipped with multiple independently operating Z-axis moving modules 3342. Each Z-axis moving module 3342 is equipped with a pick-and-place assembly 3343. Each pick-and-place assembly 3342 includes a pick-and-place cylinder 3343a mounted on a movable base of the Z-axis moving module 3342. A pneumatic clamp 3343b is mounted at the output end of the pick-and-place cylinder 3343a. By configuring multiple independently operating Z-axis moving modules 3342 in the pick-and-place transfer assembly 3344, and with each Z-axis moving module 3342 equipped with a pick-and-place assembly 3343, the pneumatic clamps 3343b on the multiple pick-and-place assemblies 3343 can pick up and transfer the solenoid valves on the conveyor line one by one, or simultaneously pick them up and transfer them.

[0033] Please see Figure 23 As shown, the pick-and-place transfer assembly two (335a, 335b) includes a pick-and-place mounting plate two 3351, the pick-and-place mounting plate two 3351 is provided with a plurality of pick-and-place components two 3352, the pick-and-place component two 3352 includes a pick-and-place cylinder two 3352 provided on the pick-and-place mounting plate two 3351, and the output end of the pick-and-place cylinder two 3352 is provided with a pneumatic clamp two 3353; Please see Figure 23 As shown, the pick-and-place transfer assembly 336 includes a pick-and-place mounting plate 3361. The pick-and-place mounting plate 3361 is provided with a transverse moving module 3362 and a rotating module 3363. A rack 3364 is provided on the moving seat of the transverse moving module 3362. The rotating module 3363 includes a rotating mounting seat 3365 provided on the pick-and-place mounting plate 3361. The rotating mounting seat 3365 is provided with multiple rotating components. Each rotating component includes a rotating rod 3366. The upper end of the rotating rod 3366 is provided with a gear 3367 that meshes with the rack 3364. The lower end of the rotating rod 3366 is provided with a connecting block 3368. The connecting block 3368 is provided with a pick-and-place cylinder 3369. The output end of the pick-and-place cylinder 3369 is provided with a pneumatic clamp 3370. The rotating rod 3366 is driven by the rack 3364 and gear 3367 to rotate the solenoid valve, so as to meet the requirements of multi-angle sorting and packaging after testing.

[0034] The moving modules 122 on the pick-and-place transfer components 334, 335a, 335b, and 336 employ high-precision linear guides and servo motors / pneumatic drives. Through the collaborative work of these components, a fully automated closed-loop process is achieved, encompassing high-pressure testing, low-pressure testing, secondary high-pressure testing, and sorting and packaging. In this embodiment, the pneumatic grippers all integrate pressure sensors, automatically adjusting the clamping force according to the weight of the object to be gripped, preventing overload damage or slippage.

[0035] Please see Figure 17 As shown, the high-pressure airtightness testing mechanism 31a, the low-pressure airtightness testing mechanism 32, and the high-pressure airtightness testing mechanism 31b are all equipped with defective product rejection slides 34 and defective product collection boxes 35 corresponding to each slide.

[0036] An automatic assembly and testing method for a solenoid valve includes the following steps: S1: The valve stem is pre-assembled onto the valve body, and the valve body is transported to the input end of the flow conveyor frame 11 through the valve body conveyor line 18. The push cylinder 232 of the push mechanism 23 drives the push block 233 to push the valve body into the flow conveyor frame 11. S2: The clamping and transfer mechanism 17 grabs the valve body through the clamping slot 1751 of the clamping block 175 and transfers it to the tightening mechanism 12. The longitudinal moving module 122 drives the valve stem tightening gun 123 to press down, and the valve stem tightening sleeve 124 tightens the valve stem. S3: The washer vibratory plate 19 transports the washer to the washer assembly mechanism 13. The washer pick-up and place moving module 132 drives the washer pneumatic clamp 134 to grab the washer. The washer is then assembled to the valve stem position of the valve body by the washer pick-up and place lifting cylinder 133. S4: The electromagnetic cover conveyor line 20 transports the electromagnetic cover to the electromagnetic cover assembly mechanism 14. The electromagnetic cover picking and placing moving module 142 drives the electromagnetic cover pneumatic clamp 144 to grab the electromagnetic cover and presses the electromagnetic cover onto the valve body through the lifting cylinder 143. S5: The nut vibratory plate 21, together with the nut ejection mechanism 22, sends the nut to the clamping port of the nut pneumatic clamp 229. The nut tightening gun 153 adjusts its position through the transverse module 152 and the longitudinal module 152. The nut tightening sleeve 154 tightens the nut into the valve body electromagnetic cover position. S6: The steering and lifting cylinder 161 drives the rotary motor 162 to descend, the steering pneumatic clamp 163 grabs the solenoid valve, the rotary motor 162 drives the valve body to rotate to the required test direction, and places the return water conveyor 11. S7: Driven by the clamping and transfer mechanism 17, the pusher plate 176 pushes the solenoid valve that has completed the direction change away from the water conveyor frame 11 and falls into the conveyor line 4. S8: The corner pusher cylinder 412 drives the corner pusher block 413 to push the solenoid valve to the direction of the oil quantity testing mechanism 42; S9: The stop cylinder 4222 of the positioning stop assembly 422 extends the stop block 4223 to fix the position of the solenoid valve. The pneumatic mechanism 4213 of the test assembly 421 drives the test module 4212 to move forward. The test shaft 4214 is connected to the solenoid valve pipeline to perform oil quantity testing. The first conveying stop mechanism (43a, 43b) controls the solenoid valve in an orderly manner through the stop rod 432 to enter the oil quantity test and high pressure air tightness test. S10: The pick-and-place transfer component 334 grabs the incoming solenoid valve through the pneumatic clamp 3343b and places it in the solenoid valve mounting fixture 314 of the high-pressure airtightness test mechanism 31a. The high-pressure test transverse module 312 drives the high-pressure airtightness test axis 316 to cooperate with the high-pressure airtightness test axis 318 to complete the high-pressure airtightness test. S11: The second pick-and-place transfer component 335a transfers the solenoid valve that has completed step S10 to the second solenoid valve mounting fixture 324 of the low-pressure airtightness test mechanism 32 through the second pneumatic clamp 3353. The low-pressure test transverse module 322 drives the first low-pressure airtightness test shaft 326 to cooperate with the second low-pressure airtightness test shaft 328 to complete the low-pressure airtightness test. S12: The take-up and transfer component 335b transfers the solenoid valve that has completed step S11 to the high-pressure airtightness test mechanism 31b, repeats the high-pressure test process, and ensures double high-pressure test coverage. S13: The pick-and-place transfer assembly 336 picks up the solenoid valve that has completed step S12, and drives the rack 3364 to drive the gear 3367 through the lateral movement module 3362. The rotating rod 3366 adjusts the angle of the solenoid valve, and the pneumatic clamp 3370 transfers the qualified product to the packaging line.

Claims

1. An automatic assembly and testing method for a solenoid valve, characterized in that, Includes the following steps: S1: The valve stem is pre-assembled onto the valve body, and the valve body is transported to the input end of the flow conveyor (11) through the valve body conveyor line (18). The push cylinder (232) of the push mechanism (23) drives the push block (233) to push the valve body into the flow conveyor (11). S2: The clamping and transfer mechanism (17) grabs the valve body through the clamping slot (1751) of the clamping block (175) and transfers it to the tightening mechanism (12). The longitudinal moving module (122) drives the valve stem tightening gun (123) to press down, and the valve stem tightening sleeve (124) tightens the valve stem. S3: The washer vibratory plate (19) transports the washer to the washer assembly mechanism (13). The washer pick-up and place moving module (132) drives the washer pneumatic clamp (134) to grab the washer. The washer is assembled to the valve stem position of the valve body through the washer pick-up and place lifting cylinder (133). S4: The electromagnetic cover conveyor line (20) transports the electromagnetic cover to the electromagnetic cover assembly mechanism (14). The electromagnetic cover picking and placing moving module (142) drives the electromagnetic cover pneumatic clamp (144) to grab the electromagnetic cover and press the electromagnetic cover onto the valve body through the lifting cylinder (143). S5: The nut vibratory plate (21) and the nut ejection mechanism (22) send the nut to the clamping port of the nut pneumatic clamp (229). The nut tightening gun (153) adjusts its position through the transverse module (152) and the longitudinal module (152). The nut tightening sleeve (154) tightens the nut into the valve body electromagnetic cover position. S6: The steering and lifting cylinder (161) drives the rotary motor (162) to descend, the steering pneumatic clamp (163) grabs the solenoid valve, the rotary motor (162) drives the valve body to rotate to the required test direction, and places the return water conveyor (11). S7: Driven by the clamping and transfer mechanism (17), the pusher plate (176) pushes the solenoid valve that has completed the direction change away from the water conveyor frame (11) and falls into the conveyor line (4). S8: The corner pusher cylinder (412) drives the corner pusher block (413) to push the solenoid valve to the direction of the oil quantity test mechanism (42); S9: The stop cylinder (4222) of the positioning stop assembly (422) extends the stop block (4223) to fix the position of the solenoid valve. The pneumatic mechanism (4213) of the test assembly (421) drives the test module (4212) to move forward. The test shaft (4214) is connected to the solenoid valve pipeline to perform oil quantity testing. The delivery stop mechanism (43a, 43b) controls the solenoid valve to enter the oil quantity test and high pressure airtightness test in an orderly manner through the stop rod (432). S10: The pick-and-place transfer assembly (334) grabs the incoming solenoid valve through the pneumatic clamp (3343b) and places it on the solenoid valve mounting fixture (314) of the high pressure airtightness test mechanism (31a). The high pressure test transverse module (312) drives the high pressure airtightness test axis (316) to cooperate with the high pressure airtightness test axis (318) to complete the high pressure airtightness test. S11: The second pick-and-place transfer component (335a) transfers the solenoid valve that has completed step S10 to the second solenoid valve mounting fixture (324) of the low-pressure airtightness test mechanism (32) through the second pneumatic clamp (3353). The low-pressure test transverse module (322) drives the first low-pressure airtightness test shaft (326) to cooperate with the second low-pressure airtightness test shaft (328) to complete the low-pressure airtightness test. S12: The second pick-up and transfer component (335b) transfers the solenoid valve that has completed step S11 to the second high-pressure airtightness test mechanism (31b), repeats the high-pressure test process, and ensures double high-pressure test coverage; S13: The pick-and-place transfer assembly three (336) picks up the solenoid valve that has completed step S12, and drives the rack (3364) to drive the gear (3367) through the lateral movement module (3362). The rotating rod (3366) adjusts the angle of the solenoid valve, and the pneumatic clamp three (3370) transfers the qualified product to the packaging line.

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