High-precision sealing testing device adopting robot for feeding and discharging and sealing testing method

Abstract

The invention relates to the technical field of high-precision sealing testing devices, and discloses a high-precision sealing testing device adopting a robot for feeding and discharging, a sealing testing method and a sealing testing machine, a sealing testing clamp is arranged in the sealing testing machine, and a display screen is arranged on the front side of the top face of the sealing testing machine; the density testing clamp comprises a bottom plate, a first cylinder and a movable pressing plate, the bottom plate is fixedly arranged in the density testing machine, stand columns are fixed to the four corners of the top face of the bottom plate, a top plate is arranged in the portion, above the bottom plate, of the density testing machine, and the top face of each stand column is fixed to the bottom face of the top plate; detection is carried out by comparing the air pressure of the standard body and the air pressure of the detected body, if the air pressure of the standard body and the air pressure of the detected body are equal, the detected body is good in sealing performance, the problems that in an existing sealing testing process, efficiency is not high, the active degree is not enough are solved, production efficiency and product quality are improved, defective products are prevented from flowing out, automation, informatization and intellectualization are integrated, and production cost is reduced. The device has the characteristics of high automation degree, stable quality, high precision and the like.

Description

Technical Field

[0001] The present invention application relates to the technical field of high-precision leak testing methods, and specifically to a high-precision leak testing device and a leak testing method using a robot for loading and unloading workpieces. Background Art

[0002] With the advancement of Industry 4.0, the manufacturing industry, especially the automotive industry, is transforming towards automation, informatization, and intelligence. The market has higher and higher requirements for product quality. During the high-pressure die-casting production process, due to reasons such as die structure and die-casting machine, the involved gas or the evolved gas from molten aluminum finally causes pores inside the workpiece. Through machining, the pores of the casting are exposed on the outside of the machining surface. Under the action of a certain pressure, the liquid inside the machine equipment will finally leak out through the pores of the casting, resulting in equipment abnormalities. Therefore, the leak detection of workpieces becomes particularly important to correctly judge the sealing performance of workpieces and ensure the efficiency and quality of workpiece processing.

[0003] Complex leak tests have always troubled engineering technicians because the leak test must ensure that every normally breathable part of the workpiece is blocked, otherwise the test cannot proceed. Currently, many automotive parts require leak tests, but some product structures are relatively complex, not only with many through holes, but also with unformed notches, and a leak testing fixture with reliable, stable, and strong operability is needed.

[0004] Currently, most are manual loading and unloading, with low automation, low efficiency, unreliable quality, etc. Moreover, during the airtightness detection of automotive parts, environmental factors have a greater impact on the detection results. It is necessary to solve the problem of how to achieve accurate and reliable detection under different environmental conditions, and currently, the airtightness detection process of most automotive parts is time-consuming. Summary of the Invention

[0005] In order to solve the problems of low efficiency, poor reliability, non-environmental friendliness during the water leak test of existing workpieces, and long manual assistance time, large in-line inventory, and low automation during the air leak test, the present invention provides a high-precision leak testing device and a leak testing method using a robot for loading and unloading workpieces to solve the problems of water leak testing and manual loading and unloading.

[0006] To achieve the above object, the present invention provides the following technical solution: It includes a leak testing machine, a leak testing fixture is arranged inside the leak testing machine, and a display screen is arranged on the front side of the top surface of the leak testing machine; The leak test fixture includes a bottom plate, a first cylinder, and a movable pressure plate. The bottom plate is fixedly arranged inside the leak test machine, and columns are fixed at the four corners of the top surface of the bottom plate. A top plate is arranged inside the leak test machine above the bottom plate, and the top surface of each column is fixedly connected to the bottom surface of the top plate. A first cylinder is arranged on the top surface of the top plate. The output end of the first cylinder is fixedly connected to a connection and fixing block, and a movable pressure plate is fixedly connected to the bottom surface of the connection and fixing block. A mechanical seal assembly is arranged on the bottom surface of the movable pressure plate. Guide columns are fixedly arranged on the top surfaces of both sides of the connection and fixing block. A bottom sealing ring is fixedly arranged on the top surface of the bottom plate. One side of the bottom sealing ring is provided with a third cylinder, and a dotting needle is fixedly connected to the output end of the third cylinder. A second cylinder is arranged at the bottom of the movable pressure plate behind the third cylinder, and a side plug is fixedly connected to the output end of the second cylinder. A fourth cylinder is arranged on the other side of the bottom plate, and a side sealing ring is fixedly connected to the output end of the fourth cylinder. The purpose is to completely replace manual loading and unloading with a robot to avoid personal injuries caused by accidents, and use a pneumatic leak test machine instead of the original water tight bench for leak testing, that is, the leak test device, to achieve the purpose of high efficiency, strong reliability, and environmental protection.

[0007] Further, a fifth cylinder is arranged behind the top plate, and a clamping plate column is arranged behind the fifth cylinder. An infrared sensor is arranged on the top surface of the bottom plate in front of the third cylinder. A product guide block is arranged inside the bottom sealing ring. A limit base is arranged on the top surface of the bottom plate on the side of the fourth cylinder, and a limit column fixing block is arranged on the top surface of the limit base.

[0008] Further, the mechanical seal assembly includes a sleeve, a pressure rod, a spring, and a pressure head. A plurality of sleeves are fixedly connected to the bottom surface of the movable pressure plate by screws, and a pressure rod is slidably inserted into the sleeve. One end of the pressure rod extending outside the sleeve is fixedly connected to the pressure head. A spring is sleeved outside the pressure rod at the bottom of the sleeve, and the upper and lower ends of the spring are respectively fixedly connected to the sleeve and the pressure rod.

[0009] Further, guide shafts are fixedly arranged at the four corners of the top surface of the movable pressure plate, and the guide shafts all slidably penetrate to the top surface of the top plate. Hoisting rings are fixedly arranged in the middle of both sides of the top surface of the top plate.

[0010] Further, a high-precision leak test method using a robot for loading and unloading, the high-precision leak test method includes the following steps: In step A, the robot places the workpiece into the leak test machine; In step B, the workpiece is pressure-sealed; In step C, the cavity of the workpiece is inflated and balanced, and detected by a leak detector; In step D, the result is marked and the workpiece is taken out for unloading.

[0011] Further, in the step A, the robot grabs the workpiece from the feeding conveyor belt and places the workpiece into the 1# airtightness testing machine; in the step B, after the 1# airtightness testing machine senses that the workpiece has been placed in place, the main cylinder and the auxiliary cylinder operate to press and seal the workpiece in place, press the main pressing cylinder to press downwards, press the left sealing cylinder to seal forward, press the rear sealing cylinder to seal forward, press the dotting cylinder to dot forward, and press the airtightness detector to start.

[0012] Further, in the step C, during the inflation detection, the airtightness detector start cavity should reach the set range value of the cavity pressure gauge within the set time, and the set time range is 60 - 99 MS. In the step C, when the main oil cylinder, the left sealing cylinder, the rear sealing cylinder, the dotting cylinder, and the anti-falling cylinder are performing the detection, the main oil cylinder, the left sealing cylinder, the rear sealing cylinder, the dotting cylinder, and the anti-falling cylinder should reach the forward position switch or the original position switch within the set time, and the set time range is 60 - 99 MS.

[0013] Further, in the step C, when the dotting cylinder is detected, the number of dotting times is set, and the range of the number of dotting points is 3 - 99 times. In the step C, the hydraulic delay sets the time for the hydraulic motor to turn off without running delay in the automatic mode, and the delay range is 9990 - 9999 MS. The time range for opening the seal after the detection completion exhaust delay is set to 30 - 99 MS. In the step C, during the test, the test air pressure is 200 - 220 Kpa, the leakage rate is ±20 pa, and the test time is 42 seconds.

[0014] Further, when the workpiece is tested and qualified in the step D, a qualified mark is punched on the workpiece through laser engraving, then the main and auxiliary cylinders are loosened, the fixation of the workpiece is released, the robot takes out the workpiece from the 1# airtightness testing machine, and the robot places the qualified workpiece on the discharging conveyor belt. If the workpiece is unqualified, the robot places it on the unqualified product discharging conveyor belt, and it is taken away manually.

[0015] Further, in the step D, the fixture for the unqualified parts maintains the working state and gives an automatic alarm. It is necessary to press the emergency stop button to reset and take out the workpiece. After taking out, it is directly placed on the discharging conveyor belt. The alarm sound should be as loud as possible under the condition of meeting the noise requirements to remind the staff to take away the unqualified products.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the present invention, the detection is carried out by comparing the air pressures of the standard body and the measured body. If the air pressures of the two are equal, it indicates that the measured body is well sealed, solving the problems of low efficiency, insufficient automation degree, improving production efficiency and product quality, avoiding the outflow of defective products in the existing airtightness testing process, integrating automation, informatization, and intelligence, and having the characteristics of high automation degree, stable quality, and high precision.

[0017] 2. In the present invention, a sealing and clamping fixture is used to block and seal the workpiece to be detected, ensuring that the workpiece is in a sealed state during the airtightness test, thereby guaranteeing the accuracy of the detection. Moreover, a robot is used to replace manual loading and unloading, and airtightness detection replaces water tightness detection. There is no need for water testing, nor does it require staff to monitor the airtightness test process, reducing labor costs and reducing the inventory at the production line side. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 is a front view schematic diagram of the airtightness testing device structure according to an embodiment of the present application; Figure 2 is a three-dimensional schematic diagram of the fixture structure in the airtightness testing device according to an embodiment of the present application; Figure 3 is a side view schematic diagram of the fixture structure in the airtightness testing device according to an embodiment of the present application; Figure 4 is a bottom-up sectional view schematic diagram of the fixture structure in the airtightness testing device according to an embodiment of the present application; Figure 5 is a bottom-up and top-down schematic diagram of the fixture structure in the airtightness testing device according to an embodiment of the present application; Figure 6 is a bottom-up sectional view schematic diagram of the fixture structure in the airtightness testing device according to an embodiment of the present application; Figure 7 is a three-dimensional structure schematic diagram of a radar bracket according to an embodiment of the present application Figure 8 is a three-dimensional structure schematic diagram of a radar bracket according to an embodiment of the present application; Figure 9 is Figure 1 a schematic diagram of the plane layout of the airtightness testing machine in the illustrated embodiment; The meanings of the reference numerals in the drawings: 1, airtightness testing machine; 2, display screen; 3, bottom plate; 4, column; 5, top plate; 6, cylinder one; 7, guide shaft; 8, lifting ring; 9, movable pressure plate; 10, connection and fixing block; 11, bottom sealing ring; 12, product guide block; 13, side plug; 14, limit column fixing block; 15, limit base; 16, cylinder two; 17, cylinder three; 18, dotting needle head; 19, cylinder four; 20, sleeve; 21, pressure rod; 22, spring; 23, pressure head; 24, guide post; 25, cylinder five; 26, clamping plate column; 27, infrared sensor. Detailed implementation manners

[0020] To make the application objectives, features, and advantages of the present application more obvious and understandable, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the embodiments described below are only a part of the embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application. Embodiment

[0021] Refer to Figure 1 and Figure 2 A high-precision airtightness testing device using a robot for loading and unloading includes an airtightness testing machine 1. An airtightness testing fixture is arranged inside the airtightness testing machine 1, and a display screen 2 is arranged on the front side of the top surface of the airtightness testing machine 1; The airtightness testing fixture includes a bottom plate 3, a cylinder 1 6, and a movable pressing plate 9. The bottom plate 3 is fixedly arranged inside the airtightness testing machine 1. The bottom plate 3 serves as the bottom support of the airtightness detection device to build the airtightness detection platform. Four corners of the top surface of the bottom plate 3 are fixedly provided with columns 4. The columns 4 are the support devices for airtightness detection to realize the entire airtightness detection space. Inside the airtightness testing machine 1 above the bottom plate 3, a top plate 5 is arranged. The top surface of each column 4 is fixedly connected to the bottom surface of the top plate 5. The main function of the top plate 5 is to serve as the upper support of the airtightness detection device. A cylinder 1 6 is arranged on the top surface of the top plate 5. A connecting and fixing block 10 is fixed to the output end of the cylinder 1 6, and a movable pressing plate 9 is fixed to the bottom surface of the connecting and fixing block 10. A mechanical seal assembly is arranged on the bottom surface of the movable pressing plate 9. Guide columns 24 are fixedly arranged on the top surfaces of both sides of the connecting and fixing block 10. A bottom sealing ring 11 is fixedly arranged on the top surface of the bottom plate 3. A cylinder 3 17 is installed on one side of the bottom sealing ring 11, and a dotting needle 18 is fixed to the output end of the cylinder 3 17. The dotting needle 18 provides point support for the part to prevent the part from skewing during the detection process. A cylinder 2 16 is installed at the bottom of the movable pressing plate 9 behind the cylinder 3 17, and a side plug 13 is fixed to the output end of the cylinder 2 16. A cylinder 4 19 is arranged on the other side of the bottom plate 3, and a side sealing ring is fixed to the output end of the cylinder 4 19. Embodiment

[0022] Refer to Figure 1 and Figure 2, A high-precision airtight testing device with robot loading and unloading, including an airtight testing machine 1. Inside the airtight testing machine 1, there is an airtight testing fixture. On the front side of the top surface of the airtight testing machine 1, there is a display screen 2FF0C. An airtight testing machine is used instead of the original water-tight table for airtight testing, that is, the airtight testing device. At the rear side of the top plate 5, there is a cylinder five 25, and at the rear side of the cylinder five 25, there is a clamping plate column 26. On the top surface of the bottom plate 3 in front of the cylinder three 17, there is an infrared sensor 27. Inside the bottom sealing ring 11, there is a product guiding block 12. On the top surface of the bottom plate 3 at the side of the cylinder four 19, there is a limit base 15, and on the top surface of the limit base 15, there is a limit column fixing block 14. The mechanical seal assembly includes a sleeve 20, a pressure rod 21, a spring 22, and a pressure head 23. On the bottom surface of the movable pressing plate 9, several sleeves 20 are fixed by screws, and inside the sleeve 20, a pressure rod 21 is slidably inserted. One end of the pressure rod 21 extending outside the sleeve 20 is fixed with a pressure head 23. A spring 22 is sleeved on the outside of the pressure rod 21 at the bottom of the sleeve 20, and the upper and lower ends of the spring 22 are respectively fixed on the sleeve 20 and the pressure rod 21 to prevent any tiny leakage of gas under high pressure. The main function of the pressing and clamping assembly is to keep the parts inside the device stable during the detection process and prevent the air pressure in the detection area from causing the parts to shift or leak air. At the four corners of the top surface of the movable pressing plate 9, guiding shafts 7 are fixed, and the guiding shafts 7 all slide through to the top surface of the top plate 5. At the middle parts on both sides of the top surface of the top plate 5, lifting rings 8 are fixed. Embodiment

[0023] A high-precision airtight testing method with robot loading and unloading, the high-precision airtight testing method includes the following steps: Step (A), the robot places the workpiece into the airtight testing machine; Step (B), press and seal the workpiece; Step (C), inflate and balance the workpiece cavity, and detect with a leak detector; Step (D), mark the result and take out the workpiece for unloading.

[0024] In step (A), the robot grabs the workpiece from the loading conveyor belt and places the workpiece into the No. 1 airtight testing machine. The fuselage mainly includes an aluminum alloy frame structure, as well as an internally assembled motor drive controller, connecting wires, and valves related to cylinders. The protective cover is composed of transparent acrylic plates. In step (B), after the No. 1 airtight testing machine senses that the workpiece has been placed in place, the main cylinder and the auxiliary cylinder operate to press and seal the workpiece in place. Press the main pressing cylinder to press down tightly, press the left sealing cylinder to seal forward, press the rear sealing cylinder to seal forward, press the dotting cylinder to dot forward, and press the airtight tester to start. The clamping and pressing assembly includes a top plate, a bottom plate, a top plate, straight holes, a sealing strip, and a dotting assembly. Among them: The main function of the top plate is to serve as the upper support of the airtightness detection device, the main function of the bottom plate is to serve as the bottom support of the airtightness detection device to build the airtightness detection platform, the function of the support column is to be the support device for airtightness detection to achieve the straight holes in the entire airtightness detection space, the function of the straight hole and inclined hole sealing components is to seal the holes for airtightness detection, the function of the pressing component is to support the airtightness detection device to prevent the parts from skewing during the airtightness detection process, the sealing strip seals the detection position of the parts to prevent air leakage, and the dotting component mainly provides point support for the parts to prevent the parts from skewing during the detection process.

[0025] In step (C), during the inflation detection, the airtightness detector cavity should reach the set range value of the cavity pressure gauge within the set time. The set time range is 60 - 99 MS. When the main oil cylinder, left sealing cylinder, rear sealing cylinder, dotting cylinder, and anti-falling cylinder are performing the detection, the main oil cylinder, left sealing cylinder, rear sealing cylinder, dotting cylinder, and anti-falling cylinder should reach the forward position switch or the original position switch within the set time. The set time range is 60 - 99 MS.

[0026] In step (C), when the dotting cylinder is detecting, set the number of dotting times. The dotting number range is 3 - 99 times. In step (C), for the hydraulic delay, set the time for the hydraulic motor to turn off without running delay in the automatic mode. The delay range is 9990 - 9999 MS. Set the time range for opening the seal during the exhaust delay after the detection is completed to be 30 - 99 MS. In step (C), during the test, the test air pressure is 200 - 220 Kpa, the leakage amount is ±20 pa, and the test time is 42 seconds.

[0027] In step (D), when the workpiece passes the test, a qualified mark is punched on the workpiece through laser engraving, then the main and auxiliary cylinders are loosened to release the fixation of the workpiece, and the robot takes the workpiece out of the No. 1 airtightness tester. The robot places the qualified workpiece on the blanking conveyor belt. If the workpiece is unqualified, the robot places it on the unqualified product blanking conveyor belt and it is taken away manually. The detection steps of the No. 2 airtightness tester are the same as those of the No. 1 airtightness tester. Ultimately, the detection steps of the No. 2, No. 3, No. 4, etc. airtightness testers with the same batch number are all the same as those of the No. 1 airtightness tester, and the cycle steps are processed to form an airtightness testing process.

[0028] In step (D), the fixture of the unqualified part maintains the working state and gives an automatic alarm. It is necessary to press the emergency stop button to reset and take out the workpiece. After taking it out, it is directly placed on the blanking conveyor belt. The alarm sound should be as loud as possible under the condition of meeting the noise requirements to remind the staff to take away the unqualified products. At the same time, if a certain workpiece fails the airtightness test, the corresponding airtightness tester will give feedback to the robot through the program to mark this part as unqualified, and then the robot will automatically place this part on the NG product blanking conveyor belt (it can hold 1, 2, 3....N pieces). At this time, there is no need to alarm, and the staff will take it away according to the regulations during the patrol inspection.

[0029] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes within the meaning and scope of the equivalent elements of the claims be included in the present application. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0030] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A high-precision testing device using a robot for loading and unloading, characterized in that: It comprises a seal testing machine (1), wherein a seal testing fixture is arranged inside the seal testing machine (1), and a display screen (2) is arranged on the front side of the top face of the seal testing machine (1); The sealing test fixture comprises a bottom plate (3), a cylinder 1 (6) and a movable pressure plate (9); the bottom plate (3) is fixedly arranged inside the sealing test machine (1), and columns (4) are fixed at four corners of the top surface of the bottom plate (3); a top plate (5) is arranged inside the sealing test machine (1) above the bottom plate (3), and the top surface of each column (4) is fixed to the bottom surface of the top plate (5); the top surface of the top plate (5) is provided with a cylinder 1 (6); a connecting fixed block (10) is fixed to the output end of the cylinder 1 (6), and a movable pressure plate (9) is fixed to the bottom surface of the connecting fixed block (10); and a mechanical seal assembly is arranged on the bottom surface of the movable pressure plate (9). The connecting and fixing blocks (10) on both sides of the connecting and fixing blocks (10) are both fixed with guide columns (24), the top surface of the bottom plate (3) is fixedly provided with a bottom sealing ring (11), a cylinder three (17) is installed on the side of one end of the bottom sealing ring (11), and a dotting needle (18) is fixed on the output end of the cylinder three (17), a cylinder two (16) is installed on the bottom of the movable pressure plate (9) on the rear side of the cylinder three (17), and a side plug (13) is fixed on the output end of the cylinder two (16), and a cylinder four (19) is provided on the other side of the bottom plate (3), and a side sealing ring is fixed on the output end of the cylinder four (19).

2. According to claim 1, a high-precision precision testing device using a robot for loading and unloading, characterized in that: The top plate (5) is provided with a cylinder five (25) at the rear side, and a card plate column (26) is provided at the rear side of the cylinder five (25); an infrared sensor (27) is provided on the top surface of the bottom plate (3) at the front side of the cylinder three (17); a product guide block (12) is provided inside the bottom sealing ring (11); a limit base (15) is provided on the top surface of the bottom plate (3) at the side of the cylinder four (19), and a limit column fixing block (14) is provided on the top surface of the limit base (15).

3. According to claim 1, a high-precision precision testing device using a robot for loading and unloading, characterized in that: The mechanical seal assembly comprises a sleeve (20), a pressure rod (21), a spring (22) and a pressure head (23); a plurality of sleeves (20) are fixed to the bottom surface of the movable pressure plate (9) by screws, and a pressure rod (21) is slidably inserted inside the sleeve (20); a pressure head (23) is fixed to one end of the pressure rod (21) extending to the outside of the sleeve (20); a spring (22) is sleeved on the outside of the pressure rod (21) at the bottom of the sleeve (20), and the upper and lower ends of the spring (22) are respectively fixed to the sleeve (20) and the pressure rod (21).

4. According to claim 1, the high-precision precision testing device using robot loading and unloading is characterized in that: Guide shafts (7) are fixed at the four corners of the top surface of the movable pressure plate (9), and the guide shafts (7) are slidably penetrated to the top surface of the top plate (5), and hanging rings (8) are fixed at the middle of both sides of the top surface of the top plate (5).

5. A high-precision precision testing method using a robot for loading and unloading obtained from a high-precision precision testing device using a robot for loading and unloading according to any one of claims 1 to 4, characterized in that: The high-precision test method comprises the following steps: In the step (A), the robot places the workpiece into the sealing test machine; The step (B) is to press-seal the workpiece; In the step (C), the workpiece cavity is inflated and balanced, and a leak meter is used for detection; In the step (D), the result is marked and the material is removed.

6. A high-precision testing method using robot loading and unloading according to claim 5, characterized in that: In the step (A), the robot grabs the workpiece from the feeding conveyor belt and puts the workpiece into the No. 1 sealing tester. In the step (B), after the No. 1 sealing tester senses that the workpiece has been placed in place, the main cylinder and the auxiliary cylinder are operated to press and seal the workpiece in place, the main pressing cylinder is pressed downward, the left sealing cylinder is pressed forward to seal, the rear sealing cylinder is pressed forward to seal, the dotting cylinder is pressed forward to dot, and the airtightness tester is pressed to start.

7. A high-precision testing method using robot loading and unloading according to claim 5, characterized in that: In the step (C), during the inflation test, the airtightness instrument starts the cavity to reach the actual range value of the cavity pressure gauge within the set time, and the set time range is 60-99MS. In the step (C), when the main oil cylinder, the left sealing cylinder, the rear sealing cylinder, the dot cylinder and the anti-drop cylinder are being tested, the main oil cylinder, the left sealing cylinder, the rear sealing cylinder, the dot cylinder and the anti-drop cylinder must reach the front position switch or the original position switch within the set time, and the set time range is 60-99MS.

8. The high-precision testing method using robot loading and unloading according to claim 5 is characterized in that: In the step (C), when the dotting cylinder is tested, the number of dotting times is set, and the dotting number range is 3-99 times. In the step (C), the hydraulic delay is set to delay the motor shutdown time of the hydraulic motor in the automatic mode without running, and the delay range is 9990-9999MS. The exhaust delay opening seal time range after the test is completed is set to 30-99MS. In the step (C), during the test, the test air pressure is 200-220Kpa, the leakage is ±20pa, and the test time is 42 seconds.

9. The high-precision testing method using robot loading and unloading according to claim 5 is characterized in that: When the workpiece is qualified in the step (D), a qualified mark is marked on the workpiece by laser engraving, and then the main and auxiliary cylinders are released to release the fixation of the workpiece. The robot takes the workpiece out of the No. 1 tightness tester and puts the qualified workpiece into the unloading conveyor belt. If the workpiece is unqualified, the robot puts it into the unqualified product unloading conveyor belt and takes it away manually.

10. The high-precision testing method using robot loading and unloading according to claim 5 is characterized in that: In the step (D), the unqualified part fixture maintains the working state and automatically alarms. The emergency stop button must be pressed to reset and remove the workpiece. After taking it out, it is directly placed on the unloading conveyor belt. The alarm sound is as loud as possible while meeting the noise requirements to remind the staff to take away the unqualified products.

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