Test fixture, fixture adjustment fixture, test equipment and switching test method

Abstract

The present invention provides a test jig, a jig adjustment and fixing device, a test equipment and a switching test method, which relate to the technical field of test equipment, and solve the technical problem in the prior art that the test jig needs to re-select a point to fix the pressure roller when switching products, which is very inconvenient. The test jig includes an upper mold and a lower mold, and the upper mold is fixedly installed with a plurality of upper mold pressing rollers on one side corresponding to the lower mold, and the upper mold has an upper mold positioning structure, and the lower mold has a lower mold positioning structure. The upper mold pressing roller of the present invention is directly fixed to the upper mold, which greatly improves the convenience compared with the prior art method in which the upper mold pressing roller is fixed to the honeycomb board and the upper mold pressing roller needs to be re-selected and fixed each time the test product is changed; and the upper mold and the lower mold can be pre-assembled together through the upper mold positioning structure and the lower mold positioning structure, which prevents the upper mold pressing roller from failing to press the test product when the upper mold is pressed down, resulting in damage to the test components; and the pre-assembly of the jig improves the test efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of testing equipment, and in particular to a testing fixture, a fixture adjusting and fixing device, testing equipment and a switching testing method. Background Art

[0002] With the continuous development of air-conditioning products, air-conditioning controllers tend to be diversified. At present, the number of production line orders is large, the quantity of each order is small, and the switching is frequent, which requires high flexibility of the production test line. Every time the production line changes an order, the test fixture needs to be switched and debugged, that is, the test line needs to switch the fixture.

[0003] The upper mold of the existing test fixture has a honeycomb perforated plate with many holes on it, which is used to fix the upper mold pressure roller. Every time the model is switched, it is necessary to re-select the point to fix the pressure roller, which is very inconvenient; and if the selected point position is deviated, it is easy to interfere with the mainboard components, causing quality problems. In addition, the fixture switching is achieved by the operator replacing the corresponding product needle plate and manually debugging the upper mold pressure roller. This method has high requirements for employees and low switching operation efficiency. It is easy for the upper mold pressure roller to interfere with the components on the controller mainboard, resulting in quality problems such as component damage. Summary of the invention

[0004] The purpose of the present invention is to provide a test fixture, a fixture adjustment and fixing device, a test equipment and a switching test method, which at least solves the technical problem in the prior art that the test fixture needs to reselect a fixed pressure roller when switching products, which is very inconvenient. The many technical effects that can be produced by the preferred technical solution among the many technical solutions provided by the present invention are described in detail below.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides a test fixture, comprising an upper die and a lower die, wherein:

[0007] A plurality of upper mold pressing rods are fixedly installed on one side of the upper mold corresponding to the lower mold, which can press the test product, and the upper mold has an upper mold positioning structure;

[0008] The lower mold has a lower mold positioning structure, and the upper mold positioning structure and the lower mold positioning structure can be pre-assembled together after being matched and connected.

[0009] Optionally, at least two positioning pins are provided on the bottom side of the upper mold to form the upper mold positioning structure, and a corresponding number of bearings are provided on the lower mold to form the lower mold positioning structure; the positioning pins can be fitted and inserted into the bearing holes of the bearings.

[0010] Optionally, at least two of the positioning pins are arranged at the bottom edge of the upper mold, and the bearing is arranged at the corresponding edge of the lower mold.

[0011] The present invention provides a jig adjustment and fixing device, wherein the jig is any of the test jigs described above, and the jig adjustment and fixing device comprises an upper mold fixing assembly, a lower mold fixing assembly and an upper mold adjustment device, wherein the upper mold fixing assembly is located above the lower mold fixing assembly and is used to fix the upper mold, and the upper mold adjustment device is transmission-connected to the upper mold fixing assembly and can drive the upper mold fixing assembly to rise and fall.

[0012] Optionally, the upper mold fixing assembly includes an upper mold fixing plate, an upper mold clamping member and a clamping drive, the upper mold clamping member is transmission connected to the clamping drive, and can clamp and fix the upper mold to the upper mold fixing plate under the drive of the clamping drive.

[0013] Optionally, the upper mold clamping member includes a lifting rotating claw, and the clamping drive is installed on the upper mold fixing plate; the lifting rotating claw is transmission-connected to the bottom side of the clamping drive, and can be rotated and lifted by the clamping drive to approach the upper mold fixing plate or rotated and dropped away from the upper mold fixing plate.

[0014] Optionally, the clamping drive is a cylinder, and the cylinder is transmission-connected to the lifting and rotating claw.

[0015] Optionally, the upper mold adjustment device includes a guide rod and a lifting drive, the upper mold fixing assembly can be slidably arranged on the guide rod, and the upper mold fixing assembly is transmission-connected to the lifting drive.

[0016] Optionally, the lower mold fixing assembly includes a base, the base is provided with a fixing groove, and the lower mold can be placed in the fixing groove and limited in the horizontal direction.

[0017] The present invention provides a testing device, comprising a needle plate and any one of the above-mentioned fixture adjustment and fixing devices, and each test product corresponds to one of the needle plates and one of the upper molds.

[0018] Optionally, the testing device further comprises a control unit, which is electrically connected to a drive of the upper die fixing assembly and a drive of the upper die adjusting device respectively.

[0019] Optionally, the testing device further comprises a sensor, and the sensor is mounted on the upper mold fixing assembly.

[0020] The present invention provides a switching test method, which uses any of the above-mentioned test devices to perform product switching test, including the following steps:

[0021] S1 fixture pre-installation, assemble the upper die and lower die together;

[0022] S2 fixture placement: put the pre-assembled fixture into the test equipment;

[0023] S3 test: put the test product into the fixture and fix it before testing;

[0024] S4 switches the fixture, takes out the original fixture and puts in the pre-installed new fixture, and repeats step S3.

[0025] Optionally, the S3 test step includes:

[0026] S31 is an upper die lifting step, in which the upper die fixing assembly is controlled to clamp the upper die and then the upper die adjusting device is controlled to lift the upper die;

[0027] S32 is a step of placing a test product, placing the test product on a carrier plate of the lower mold;

[0028] S33 is a test product fixing step, controlling the upper mold adjusting device to descend so that the upper mold pressing roller presses the test product;

[0029] S34 is a step for returning the upper die fixing assembly to its original position, and after the test is completed, the upper die adjusting device is controlled to lift the upper die fixing assembly to its original position.

[0030] The present invention provides a test fixture, comprising an upper die and a lower die, wherein a plurality of upper die pressing rods capable of pressing a test product are fixedly installed on one side of the upper die corresponding to the lower die. The upper die pressing rods of the present invention are directly fixed to the upper die, which greatly improves convenience compared with the prior art method in which the upper die pressing rods are fixed to a honeycomb panel and a point needs to be reselected for fixing the upper die pressing rods each time the test product is changed. The upper die and the lower die can be preassembled together through an upper die positioning structure and a lower die positioning structure, thereby preventing the upper die pressing rods from failing to press the test product when the upper die is pressed downward, thereby causing damage to the test components. Furthermore, the preassembly of the fixture improves the test efficiency.

[0031] The jig adjustment and fixing device provided by the present invention comprises an upper mold fixing component, a lower mold fixing component and an upper mold adjusting device. After the upper mold fixing component fixes the upper mold, the upper mold adjusting device can drive the upper mold fixing component that clamps the upper mold to rise and fall, thereby conveniently lifting or pressing down the upper mold, thereby realizing the placement, testing and removal of the test product, which is convenient and quick.

[0032] In the test equipment provided by the present invention, each test product corresponds to a needle plate and an upper mold, that is, the number and position of the multiple upper mold pressing rods on the upper mold also correspond to the test product, thereby avoiding the safety risk of interference between the upper mold pressing rods and the test product and affecting the product quality.

[0033] After using the above-mentioned testing equipment to switch and test the fixture, employees only need to perform the following three fool-proof operations, namely, aligning the pre-installed upper and lower molds, placing them into the lower mold cavity, switching the fixtures as needed, and connecting the needle plate wires to the test equipment interface to complete the switching of the product fixture. The fixture switching is efficient and convenient, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 It is a schematic diagram of the explosion structure of a test fixture provided in a specific embodiment of the present invention;

[0036] Figure 2 is a schematic diagram of a three-dimensional structure of a test device provided by a specific embodiment of the present invention from a first viewing angle;

[0037] Figure 3 is a schematic diagram of a three-dimensional structure of a testing device provided by a specific embodiment of the present invention from a second viewing angle;

[0038] Figure 4 It is a structural schematic diagram of the top plate of the upper mold fixing plate;

[0039] Figure 5 It is a structural schematic diagram of the pressing plate of the upper die fixing plate;

[0040] Figure 6 It is a structural diagram of the pad.

[0041] In the figure, 1 is the upper die; 11 is the positioning pin; 12 is the top plate; 13 is the pressure plate; 14 is the backing plate;

[0042] 2. Lower die; 21. Bearing;

[0043] 3. Upper mold pressing rod;

[0044] 4. Base; 41. Fixing slot;

[0045] 5. Guide rod;

[0046] 6. Operation panel;

[0047] 7. Clamping cylinder; 71. Lifting rotating claw;

[0048] 8. Lifting cylinder; 81. Solenoid valve;

[0049] 9. Photoelectric switch. DETAILED DESCRIPTION

[0050] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0051] Embodiment 1:

[0052] like Figure 1 As shown, the present invention provides a test fixture, comprising an upper die 1 and a lower die 2, wherein:

[0053] A plurality of upper die pressing rods 3 are fixedly installed on one side of the upper die 1 corresponding to the lower die 2, which can press the test product, and the upper die 1 has an upper die positioning structure;

[0054] The lower die 2 has a lower die positioning structure, and the upper die positioning structure and the lower die positioning structure are matched and connected to each other so that the upper die 1 and the lower die 2 can be pre-assembled together.

[0055] The method in which the upper mold pressing rod 3 is directly fixed to the upper mold 1 greatly improves convenience compared with the method in the prior art in which the upper mold pressing rod is fixed to the honeycomb panel and a new point needs to be selected to fix the upper mold pressing rod each time the test product is changed; and the upper mold 1 and the lower mold 2 can be pre-assembled together through the upper mold positioning structure and the lower mold positioning structure, eliminating the situation in which the upper mold pressing rod fails to press the test product when the upper mold is pressed down, resulting in damage to the test components; and the pre-assembly of the fixture improves the test efficiency.

[0056] As an optional embodiment, at least two locating pins 11 are provided on the bottom side of the upper mold 1 to form an upper mold positioning structure, and a corresponding number of bearings 21 are provided on the lower mold 2 to form a lower mold positioning structure; the locating pins 11 can be fitted and inserted into the bearing holes of the bearings 21.

[0057] As an optional embodiment, at least two positioning pins 11 are arranged at the bottom edge of the upper mold 1 , and the bearing 21 is arranged at the corresponding edge of the lower mold 2 .

[0058] Embodiment 2:

[0059] The present invention provides a jig adjustment and fixing device, wherein the jig is any of the above test jigs, and the jig adjustment and fixing device comprises an upper mold fixing component, a lower mold fixing component and an upper mold adjustment device, wherein the upper mold fixing component is located above the lower mold fixing component and is used to fix the upper mold 1, and the upper mold adjustment device is transmission-connected to the upper mold fixing component and can drive the upper mold fixing component to rise and fall.

[0060] After the upper mold fixing assembly fixes the upper mold 1, the upper mold adjusting device can drive the upper mold fixing assembly that clamps the upper mold 1 to rise and fall, thereby conveniently lifting or pressing down the upper mold 1, realizing the placement, testing and removal of the test product, which is convenient and quick.

[0061] As an optional implementation, the upper mold fixing assembly includes an upper mold fixing plate, an upper mold clamping member and a clamping drive. The upper mold clamping member is transmission-connected to the clamping drive and can clamp and fix the upper mold 1 to the upper mold fixing plate under the drive of the clamping drive.

[0062] As an optional embodiment, the upper mold clamping member includes a lifting rotating claw 71, and the clamping cylinder 7 serving as a clamping drive is installed on the upper mold fixing plate; the lifting rotating claw 71 is transmission-connected to the bottom side of the clamping cylinder 7, and can be driven by the clamping cylinder 7 to rotate and lift closer to the upper mold fixing plate or rotate and fall away from the upper mold fixing plate.

[0063] The clamping cylinder 7 is used as the clamping drive, and the clamping cylinder 7 can quickly drive the lifting and rotating claw 71 connected thereto to move.

[0064] As an optional embodiment, the upper mold adjustment device includes a guide rod 5 and a lifting drive, the upper mold fixing assembly can be slidably arranged on the guide rod 5, and the upper mold fixing assembly is in transmission connection with the lifting drive. The lifting drive is a lifting cylinder 8, and the lifting cylinder 8 is controlled by a solenoid valve 81.

[0065] As an optional implementation, the lower mold fixing assembly includes a base 4 , and a fixing groove 41 is provided on the base 4 . The lower mold 2 can be placed in the fixing groove 41 and limited in the horizontal direction.

[0066] Embodiment 3:

[0067] like Figure 2 and Figure 3 As shown, the present invention provides a PCBA test device, including a needle plate and any of the above jig adjustment and fixing devices, each test product corresponds to a needle plate and an upper mold 1. Each test product corresponds to a needle plate and an upper mold 1, that is, the number and position of multiple upper mold pressing rods 3 on the upper mold 1 also correspond to the test product, thereby avoiding the risk of interference between the upper mold pressing rods 3 and the test product and affecting the product quality.

[0068] As an optional implementation, the testing device further comprises a control unit, which is electrically connected to a drive of the upper die fixing assembly and a drive of the upper die adjusting device respectively.

[0069] As an optional implementation, the testing device further includes a sensor, and the sensor is mounted on the upper mold fixing assembly.

[0070] like Figure 1As shown, the needle plate on the bottom side of the lower mold 2 is used to fix the test probe; the carrier plate of the lower mold 2 is used to place the PCBA, and there are two high-precision bearings 21 on the carrier plate for aligning with the locating pins 11 of the upper mold 1. The double-precision locating pins 11 of the upper mold 1 are used to align with the carrier plate to complete the assembly of the upper mold 1 and the lower mold 2. The integrated upper mold fixing assembly includes an upper mold fixing plate, and the upper mold clamping assembly includes four lifting and rotating claws 71 with rotation and lifting functions, which can fix the test upper mold 1 of different products. The fixing groove 41 on the base 4 can position the test needle plates of different products, and the needle plate positioning is achieved through the four edges in the device, see Figure 3 .

[0071] The upper mold fixing plate includes a top plate 12 and a pressing plate 13. The structures of the top plate 12 and the pressing plate 13 are shown in FIG. Figure 4 and Figure 5 In a specific embodiment of the present invention, a pad 14 is also installed on the upper mold fixing plate, so that the test equipment is suitable for two test modes, one is to use the new fixture of the present invention for testing, and the other is to use the pad 14 to install the old pressure rod temporarily when the upper mold 1 of the new fixture needs maintenance or replacement to ensure normal testing. Figure 6 , install the old upper mold pressing rod in the hole on the backing plate 14 that is adapted to the product, and the test can be achieved without installing the upper mold 1 of the present invention.

[0072] The test equipment includes a PLC control unit. The operator only needs to take out the test fixture and put it down. The rest is achieved by clicking buttons on the test equipment operation panel 6, so that the employee can switch the fixtures (upper mold 1 and lower mold 2) in a simple way.

[0073] The clamping drive and the lifting drive are both cylinders, and the cylinders that can move up and down replace manual labor to lift and press down the upper mold 1 of the test fixture through quick clamps.

[0074] It also includes a photoelectric switch 9, and the grating sensor is electrically connected to the control unit to prevent employees' limbs from being crushed by the press. When an object is detected, the machine is stopped and the press remains inactive.

[0075] Use any of the above test equipment to perform product switching test. The switching test includes the following steps:

[0076] S1 fixture is pre-installed to assemble the upper mold 1 and the lower mold 2 together;

[0077] S2 fixture placement: put the pre-assembled fixture into the test equipment;

[0078] S3 test: put the test product into the fixture and fix it before testing;

[0079] S4 switches the fixture, takes out the original fixture and puts in the pre-installed new fixture, and repeats step S3.

[0080] Among them, the S3 test steps include:

[0081] S31 upper die lifting step, controlling the upper die fixing assembly to clamp the upper die 1 and then controlling the upper die adjusting device to lift the upper die 1;

[0082] S32 is a step of placing a test product, placing the test product on the carrier plate of the lower mold 2;

[0083] S33 is a test product fixing step, in which the upper mold adjusting device is controlled to descend so that the upper mold pressing roller 3 presses the test product tightly;

[0084] S34 is a step for returning the upper die fixing assembly to its original position, and after the test is completed, the upper die adjusting device is controlled to lift the upper die fixing assembly to its original position.

[0085] The steps to switch the fixture are as follows:

[0086] 1. Assemble the upper mold 1 and the lower mold 2 together and place them into the positioning cavity (fixing groove 41) of the lower mold 2. Use the double precision positioning pins 11 of the upper mold 1 to cooperate with the bearings 21 on the carrier plate of the lower mold 2 to complete the pre-assembly of the upper mold 1 and the lower mold 2;

[0087] 2. Press the press control start button on the test equipment, and the press automatically descends; click the upper die clamping button on the operation panel 6, the four lifting and rotating claws 71 rotate 90°, and then lift up to clamp the upper die 1, and then the entire upper die fixing assembly automatically lifts the upper die 1 to the initial state position;

[0088] 3. Insert the probe connection cable on the needle board into the communication interface of the test equipment for testing;

[0089] 4. Take the test fixture and follow the above steps 3, 2, 1 to complete a new round of testing.

[0090] In the actual production process, due to the uncertainty of orders, as the product amount is frequently switched, the test fixture must also be replaced. In the process of switching lines, the fixture adjustment and fixing device of the present invention can solve the problems of low switching efficiency and damage to test components caused by the fixture after switching:

[0091] Before switching the line, this device aligns the locating pin 11 of the upper mold 1 of the corresponding product into the bearing 21 sleeve of the lower mold 2 carrier plate with a gap of 0.5mm, so that the upper mold 1 and the lower mold 2 are precisely assembled together, eliminating the risk of the PCBA being lifted up by the probe due to the inaccurate alignment of the locating pin and the locating sleeve when the upper mold 1 is pressed down, and there is a risk that the probe will break the components on the PCBA; it can also determine in advance whether there is interference between the pressing rod of the upper mold and the PCBA product on the lower mold carrier plate; through this device, employees only need three steps of fool-proof operation to complete the switching of product fixtures, which is efficient and convenient.

[0092] By designing the needle plate and upper mold 1 corresponding to each other on the PCBA, the upper mold pressing rod is prevented from interfering with the components on the PCBA, thus eliminating such quality problems.

[0093] By using the test equipment of the present invention, the time for switching product fixtures is shortened from 5 minutes to 30 seconds, and the efficiency is improved by 10 times, thus meeting the efficiency of product switching of the production line and avoiding affecting the production of the entire production line.

[0094] The extremely simple, efficient and flexible device of the present invention realizes extremely simple, efficient and safe disassembly and installation of product test fixtures in a line with frequent line changes, solving the pain point problem of low efficiency and quality risks in current product test fixture switching.

[0095] In the description of the invention, it should be noted that, unless otherwise specified, the meaning of "plurality" is two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0096] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0097] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A test fixture, characterized in that: It includes an upper die and a lower die, wherein: A plurality of upper mold pressing rods are fixedly installed on one side of the upper mold corresponding to the lower mold, which can press the test product, and the upper mold has an upper mold positioning structure; The lower mold has a lower mold positioning structure, and the upper mold positioning structure and the lower mold positioning structure are matched and connected to each other so that the upper mold and the lower mold can be pre-assembled together; Each test product corresponds to a needle plate and an upper mold. The number and position of the multiple upper mold pressing rods on the upper mold correspond to the test product. The needle plate on the bottom side of the lower mold is used to fix the test probe; the carrier plate of the lower mold is used to place the PCBA.

2. The test fixture according to claim 1, characterized in that: At least two positioning pins are arranged on the bottom side of the upper die to form the upper die positioning structure, and a corresponding number of bearings are arranged on the lower die to form the lower die positioning structure; the positioning pins can be fitted and inserted into the bearing holes of the bearings.

3. The test fixture according to claim 2, characterized in that: At least two of the positioning pins are arranged at the bottom edge of the upper mold, and the bearing is arranged at the corresponding edge of the lower mold.

4. A fixture adjustment and fixing device, wherein the fixture is a test fixture as described in any one of claims 1 to 3, characterized in that: The jig adjustment and fixing device includes an upper mold fixing component, a lower mold fixing component and an upper mold adjustment device. The upper mold fixing component is located above the lower mold fixing component and is used to fix the upper mold. The upper mold adjustment device is transmission-connected to the upper mold fixing component and can drive the upper mold fixing component to rise and fall.

5. The fixture adjustment and fixing device according to claim 4, characterized in that: The upper die fixing assembly includes an upper die fixing plate, an upper die clamping member and a clamping drive. The upper die clamping member is transmission-connected to the clamping drive and can clamp and fix the upper die to the upper die fixing plate under the drive of the clamping drive.

6. The fixture adjustment and fixing device according to claim 5, characterized in that: The upper mold clamping member includes a lifting and rotating claw, and the clamping drive is installed on the upper mold fixing plate; the lifting and rotating claw is transmission-connected to the bottom side of the clamping drive, and can be rotated and lifted by the clamping drive to approach the upper mold fixing plate or rotated and dropped away from the upper mold fixing plate.

7. The fixture adjustment and fixing device according to claim 6, characterized in that: The clamping drive is a cylinder, and the cylinder is drivingly connected to the lifting and rotating claw.

8. The fixture adjustment and fixing device according to claim 4, characterized in that: The upper mold adjusting device comprises a guide rod and a lifting drive, the upper mold fixing assembly can be slidably arranged on the guide rod, and the upper mold fixing assembly is transmission-connected with the lifting drive.

9. The fixture adjustment and fixing device according to claim 4, characterized in that: The lower mold fixing assembly comprises a base, and a fixing groove is arranged on the base. The lower mold can be placed in the fixing groove and limited in the horizontal direction.

10. A testing device, characterized in that: It comprises a needle plate and a jig adjusting and fixing device as described in any one of claims 4 to 9, and each test product corresponds to one needle plate and one upper mold.

11. The testing device according to claim 10, characterized in that It also includes a control unit, which is electrically connected to the drive of the upper mold fixing assembly and the drive of the upper mold adjusting device respectively.

12. The testing device according to claim 10, characterized in that It also includes a sensor, which is installed on the upper mold fixing component.

13. A switching test method, characterized in that: Using the test equipment described in any one of claims 10 to 12 to perform a product switching test comprises the following steps: S1 fixture pre-installation, assemble the upper die and lower die together; S2 fixture placement: put the pre-assembled fixture into the test equipment; S3 test: put the test product into the fixture and fix it before testing; S4 switches the fixture, takes out the original fixture and puts in the pre-installed new fixture, and repeats step S3.

14. The switching test method according to claim 13, characterized in that: The S3 test steps include: S31 is an upper die lifting step, in which the upper die fixing assembly is controlled to clamp the upper die and then the upper die adjusting device is controlled to lift the upper die; S32 is a step of placing a test product, placing the test product on a carrier plate of the lower mold; S33 is a test product fixing step, controlling the upper mold adjusting device to descend so that the upper mold pressing roller presses the test product; S34 is a step for returning the upper die fixing assembly to its original position, and after the test is completed, the upper die adjusting device is controlled to lift the upper die fixing assembly to its original position.

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