Drawer type clamp template switching device

Abstract

The utility model relates to the technical field of clamp switching equipment, in particular to a drawer type clamp template switching device which comprises a body, an upper die sealing mechanism and a template switching mechanism, the upper die sealing mechanism and the template switching mechanism are arranged on the body, the template switching mechanism is located behind the upper die sealing mechanism, and a template mounting position is arranged on the upper die sealing mechanism. The template switching mechanism comprises a lifting rack and drawing assemblies arranged on the two sides of the lifting rack, and the drawing assemblies extend to the two sides of the upper die sealing mechanism. A plurality of layers of templates are arranged on the lifting rack in the vertical direction, the drawing assembly is used for drawing any template to a template mounting position of the upper die sealing mechanism, and the upper die sealing mechanism is used for driving the template on the template mounting position of the upper die sealing mechanism to move downwards to block the upper surface of a workpiece. The utility model can solve the technical problem that the existing clamp template is complicated to replace, disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of fixture switching equipment, in particular to a drawer-type fixture template switching device. Background Art

[0002] A fixture is a device used to secure an object during manufacturing, machining, and testing. A fixture template, on the other hand, is a device that conforms to the surface trajectory of the object being clamped, allowing it to completely adhere to the workpiece's surface after clamping. Fixture templates have a wide range of applications and can be used independently or installed on various devices. For example, they are often installed in water-testing equipment as sealing components for airtightness testing of workpieces. During use, the fixture template clamps and seals the through-hole structure on the workpiece. The workpiece is then immersed in water, and air is inflated into the cavity formed after the seal is sealed to observe whether any bubbles escape from the workpiece.

[0003] For example, Chinese invention patent publication number CN106370357A discloses a multifunctional water leak detection device, which includes a frame and a fixture drive mechanism, a tooling fixture mechanism, and a movable water tank mechanism arranged on the frame from top to bottom. This technical solution makes the pressure plate and the base plate detachable to facilitate the replacement of different tooling fixture mechanisms, thereby testing the air tightness of different engine components; however, this method of replacing the fixture template is cumbersome to operate and has low production efficiency.

[0004] Based on this, the present application provides a drawer-type fixture template switching device, which can set at least two different upper templates on the water inspection machine at the same time, so as to switch according to the usage situation, so as to be used to block different cavities to be tested on the same workpiece or block cavities on different surfaces of workpieces to be tested; so as to reduce the frequency of manual template replacement and improve production efficiency. Utility Model Content

[0005] The utility model provides a drawer-type fixture template switching device, which can solve the technical problem of complicated fixture template replacement operation in the prior art.

[0006] This application provides the following technical solutions:

[0007] A drawer-type fixture template switching device includes a main body and an upper mold sealing mechanism and a template switching mechanism arranged on the main body. The template switching mechanism is located behind the upper mold sealing mechanism. A template mounting position is provided on the upper mold sealing mechanism. The template switching mechanism includes a lifting frame and a pulling assembly arranged on both sides of the lifting frame, and the pulling assembly extends to both sides of the upper mold sealing mechanism; several layers of templates are arranged on the lifting frame in the vertical direction, and the pulling assembly is used to pull any one template to the template mounting position of the upper mold sealing mechanism. The upper mold sealing mechanism is used to drive the template on its template mounting position to move downward to seal the upper surface of the workpiece.

[0008] Technical principles and beneficial effects:

[0009] Since several layers of templates are provided on the lifting frame, when in use, a template matching the workpiece to be tested can be selected as needed, and then the lifting frame is driven to move so that the template is lifted and lowered to be flush with the pull-out assembly. At this time, the pull-out assembly can drive the template to move forward, thereby extracting the template stored on the template switching mechanism to the template mounting position of the upper mold sealing mechanism, and then the template is driven downward by the upper mold sealing mechanism to seal the cavity on the upper surface of the workpiece to be tested, so as to facilitate subsequent airtightness water testing.

[0010] By adopting the drawer-type structure design of this application, multiple templates can be set on the template switching mechanism, and the corresponding template can be directly extracted when in use. Compared with the existing technology, there is no need to manually replace and disassemble the template. On the one hand, it reduces the workload of the staff, and on the other hand, it greatly improves the clamping efficiency and detection efficiency, ultimately improving the production efficiency of the enterprise.

[0011] Furthermore, the lifting frame includes a limiting column, a storage rack and a lifting drive component. The top of the limiting column is fixed on the top plate of the main body, the storage rack is slidably installed on the limiting column, and the lifting drive component is used to drive the storage rack to move up and down on the limiting column.

[0012] Beneficial effects: The limiting column is used to limit and guide the storage rack to ensure that the storage rack does not deviate when moving up and down. The lifting drive is used to drive the storage rack to move up and down, so that the templates of different layers are aligned with the pull-out components.

[0013] Furthermore, the pulling assembly includes a linear guide rail, which is arranged at the bottom of the limiting column through a mounting plate; a connector is provided on the slider of the linear guide rail, and the connector is used to cooperate with the template for connection.

[0014] Beneficial effect: By setting up the plug-in connector, when the storage rack moves up and down to the set position, the template corresponding to the pull-out assembly on the storage rack is connected to the plug-in connector. When the pull-out assembly moves, the template is driven by the plug-in connector to gradually leave the storage rack and then moved to the template installation position of the upper mold sealing mechanism.

[0015] Furthermore, several layers of guide frames for placing templates are provided on two opposite side walls of the storage rack, and several first positioning cylinders are provided on the outer side wall of the storage rack, and each layer of guide frames corresponds to a first positioning cylinder.

[0016] Beneficial effects: A multi-layer guide frame is set up to pre-store multiple templates, saving the time of disassembling and replacing templates one by one, and automatically switching the corresponding template when in use; a positioning cylinder is set up to facilitate positioning of the template and ensure that the template is placed accurately.

[0017] Furthermore, a guide limit assembly and a plug-in block are symmetrically provided on the upper surface of each template. The guide limit assembly includes a limit block, on which a guide wheel and a limit ball are provided. The limit ball is located below the guide wheel, and the guide wheel is slidingly provided on the guide frame, and the limit ball is in rolling contact with the side wall of the guide frame; the plug-in block is provided with a U-shaped groove for cooperating with the plug-in part on the linear guide rail, and the plug-in block is also provided with a first positioning hole for cooperating with the first positioning cylinder, and the piston rod of the first positioning cylinder is used to be inserted into the first positioning hole.

[0018] Beneficial effects: A limit block is set on the template, which is used to install the template on the guide frame on the one hand, and to limit the template on the other hand to ensure the accurate position of the template during operation; the plug-in block is used to cooperate with the plug-in on the linear guide rail, so that the template is driven to move to the top of the press-fitting position through the movement of the linear guide rail.

[0019] Furthermore, the lifting drive component is a lifting cylinder or a screw assembly. When the lifting drive component is a lifting cylinder, the cylinder body of the lifting cylinder is set on the top plate of the main body, and the piston rod of the lifting cylinder is connected to the top plate of the storage rack; when the lifting drive component is a screw assembly, the screw assembly includes a screw and a motor, the top of the screw is fixedly set on the top plate of the main body, the storage rack is passed through the sleeve of the screw, and the motor is used to drive the screw to rotate.

[0020] Beneficial effects: When in use, the type of lifting drive component can be selected according to the situation. For example, when the number of templates is 2 groups, a lifting cylinder is used. When the number of templates is greater than 2 groups, a larger vertical movement stroke is required, and a screw assembly is selected as the lifting drive component.

[0021] Furthermore, the upper mold sealing mechanism includes a press-fitting frame, a connecting column and a press-fitting master cylinder. The connecting column is arranged on the main body, the press-fitting frame is slidably mounted on the connecting column through a connecting plate, the press-fitting master cylinder is arranged on the top plate of the main body, and the piston rod of the press-fitting master cylinder is fixedly connected to the connecting plate, which is used to drive the press-fitting frame to move up and down on the connecting column.

[0022] Beneficial effects: Connecting columns are provided to guide and limit the vertical movement of the press frame, thereby improving the stability of operation; when the template is pulled onto the press frame, the press main cylinder is used to drive the press frame downward, thereby pressing the template and sealing the cavity on the upper surface of the workpiece.

[0023] Furthermore, the template mounting position is set at the bottom of the press frame, and the template mounting position is a guide frame; a second positioning cylinder is provided on the outer wall of the press frame, and a positioning block for cooperating with the second positioning cylinder is provided on the template, and a second positioning hole is provided on the positioning block, and the piston rod of the second positioning cylinder is used to be inserted into the second positioning hole.

[0024] Beneficial effect: The template installation position is set as a guide frame, which facilitates the template to move from the guide frame on the rear storage rack to the guide frame of the press rack. The positioning cylinder and the positioning block are used together to ensure the position accuracy of the template when it moves to the press rack.

[0025] Furthermore, a press-fitting station is provided on the main body, which is located directly below the press-fitting frame and is fixed to the bottom of the connecting column through a mounting plate; a plurality of clamping fixtures are provided on the mounting plate, and the clamping fixtures are arranged along the circumference of the press-fitting station for clamping the workpiece to be tested placed on the press-fitting station.

[0026] Beneficial effects: The press-fitting station is used to place the workpiece to be tested, and the clamping fixture is used to fix the workpiece to be tested to ensure that the workpiece does not move during the airtightness water test.

[0027] Furthermore, a lifting water tank is provided on the main body, which includes a water tank and a lifting mechanism. The water tank is located directly below the pressing station, and the lifting mechanism is used to drive the water tank to move upward so that the workpiece to be tested is immersed in the water tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural diagram of a drawer-type fixture template switching device;

[0029] Figure 2 for Figure 1 Structural diagram of the other direction;

[0030] Figure 3 for Figure 1 Schematic diagram of the structure after omitting the main body;

[0031] Figure 4 It is a structural diagram of the template switching mechanism;

[0032] Figure 5 for Figure 4 Left view of;

[0033] Figure 6 It is a schematic diagram of the structure of the template;

[0034] Figure 7 This is a schematic diagram of the installation of the pull-out component;

[0035] Figure 8 Schematic diagram of the structure of the upper die sealing mechanism;

[0036] Figure 9 It is a structural diagram of the press-fit rack;

[0037] Figure 10 This is a structural diagram of the water inspection machine in Example 2;

[0038] Figure 11 for Figure 10Structural diagram of the other direction;

[0039] Figure 12 This is a schematic structural diagram of the press-fit rack in Example 2;

[0040] Figure 13 for Figure 12 Schematic diagram of the structure in another direction. DETAILED DESCRIPTION

[0041] The following is further described in detail through specific implementation methods:

[0042] : The marks in the drawings of the specification include: main body 1, upper mold sealing mechanism 2, press-fitting frame 21, second positioning cylinder 211, connecting column 22, press-fitting main cylinder 23, second connecting plate 24, template switching mechanism 3, lifting frame 31, limiting column 311, storage rack 312, guide frame 3121, avoidance groove 3122, first positioning cylinder 3123, lifting cylinder 313, first connecting plate 314, pulling assembly 32, linear guide rail 321, connector 322, template 4, limiting block 41, guide wheel 411, limiting ball 412, plug-in block 42, first positioning hole 421, U-shaped groove 422, second positioning block 43, second positioning hole 431, air inlet 44, press-fitting station 5, clamping fixture 51, water tank 6, drive assembly 61, lifting bracket 62, sealing cylinder 7, sealing head 71, and inflation port 711.

[0043] Example 1

[0044] like Figure 1-3 As shown, a drawer-type fixture template switching device includes a main body 1 and an upper mold sealing mechanism 2 and a template switching mechanism 3 arranged on the main body 1. The template switching mechanism 3 is located behind the upper mold sealing mechanism 2. A template mounting position is provided on the upper mold sealing mechanism 2. The template switching mechanism 3 includes a lifting frame 31 and a pulling assembly 32 arranged on both sides of the lifting frame 31, and the pulling assembly 32 extends to both sides of the upper mold sealing mechanism 2; several layers of templates 4 are arranged on the lifting frame 31 in the vertical direction, and the pulling assembly 32 is used to pull any one template 4 to the template mounting position of the upper mold sealing mechanism 2, and the upper mold sealing mechanism 2 is used to drive the template 4 on its template mounting position to move downward to seal the upper surface of the workpiece.

[0045] like Figure 3-5As shown, the lifting frame 31 includes a limiting column 311, a storage rack 312 and a lifting drive component. The top of the limiting column 311 is fixed on the top plate of the main body 1, and the storage rack 312 is slidably passed through the limiting column 311. The lifting drive component is used to drive the storage rack 312 to perform a lifting movement on the limiting column 311; specifically, in this embodiment, in order to facilitate installation, a first connecting plate 314 is also provided on the top of the limiting column 311. During installation, the first connecting plate 314 is fixed to the top plate of the main body 1 by bolts. The limiting column 311 is set to four groups, which are respectively passed through the four corners of the storage rack 312.

[0046] Specifically, the lifting drive can be a lifting cylinder 313 or a screw assembly. When the lifting drive is a lifting cylinder 313, the cylinder body of the lifting cylinder 313 is fixed to the top plate of the first connecting plate 314, and the piston rod of the lifting cylinder 313 is connected to the top plate of the storage rack 312. In specific use, the lifting cylinder 313 can be a pneumatic cylinder or an oil cylinder. When the lifting drive is a screw assembly (not shown in the figure), the screw assembly includes a screw and a servo motor. The top of the screw is fixed to the top plate of the first connecting plate 314, the storage rack 312 is inserted into the sleeve of the screw, and the servo motor is used to drive the screw to rotate. In actual use, the type of lifting drive can be selected according to the situation. For example, when the number of templates 4 is 2, the lifting cylinder 313 is used. When the number of templates 4 is greater than 2, a larger vertical motion is required, and the screw assembly is selected as the lifting drive. This embodiment takes the setting of two layers of templates 4 as an example for detailed installation instructions.

[0047] The two opposite side walls of the storage rack 312 are provided with several layers of guide racks 3121 for placing the template 4. Specifically, in this embodiment, two layers of guide racks 3121 are provided, and in order to place the template 4, a U-shaped avoidance groove 3122 is also provided on the side wall of the storage rack 312; Figure 5 As shown, two first positioning cylinders 3123 are provided on the outer wall of the storage rack 312 through a bracket, and each layer of the guide rack 3121 corresponds to a first positioning cylinder 3123. The first positioning cylinder 3123 is used to position the template 4 after placing it to ensure that the template 4 is placed accurately.

[0048] Specific examples Figure 6As shown, the upper surface of each template 4 is symmetrically provided with a guide limit assembly and a plug-in block 42, the guide limit assembly includes a limit block 41, the limit block 41 is an inverted L-shape, and can be fixed to the upper surface of the template 4 by screws, pins or bolts, and at least two or three pairs of limit blocks 41 are provided on each template 4; each limit block 41 is provided with a guide wheel 411 and a limit ball 412, the limit ball 412 is located below the guide wheel 411, the guide wheel 411 is used to be slidably set on the guide frame 3121, and the limit ball 412 is in rolling contact with the side wall of the guide frame 3121; during installation, the template 4 is horizontally inserted into the storage rack 312, so that the guide wheel 411 is located above the guide frame 3121, and the template 4 is guided and limited. The limit balls 412 on both sides limit the template 4 to the left and right, thereby ensuring that the template 4 is accurately positioned after placement.

[0049] The plug-in block 42 is fixed to both sides of the template 4 by bolts. The plug-in block 42 is provided with a first positioning hole 421 for cooperating with the first positioning cylinder 3123. When the template 4 is placed, the piston rod of the first positioning cylinder 3123 is inserted into the first positioning hole 421 to ensure that the template 4 is placed in the correct position; the plug-in block 42 is also provided with a U-shaped groove 422 for cooperating with the pulling assembly 32.

[0050] like Figure 7 As shown, the pulling assembly 32 includes a linear guide rail 321. Specifically, the linear guide rail 321 is arranged at the bottom of the limit column 311 through a mounting plate. In this embodiment, two sets of linear guide rails 321 are arranged. The two sets of linear guide rails 321 are located on both sides of the storage rack 312 and extend to both sides of the upper mold sealing mechanism 2; a plug-in component 322 is provided on the slider of each linear guide rail 321, and the plug-in component 322 is used to cooperate with the plug-in block 42 on the template 4. Specifically, the plug-in component 322 is a friction plate. When the template 4 moves up and down, the friction plate can be inserted into the U-shaped groove 422 of the plug-in block 42. At this time, driving the slider on the linear guide rail 321 to move can drive the entire template 4 to move back and forth, thereby realizing pulling the template 4 from the storage rack 312 to the template mounting position of the upper mold sealing mechanism 2; the linear guide rail 321 in this embodiment is a prior art. When in use, the slider is driven to move by a servo motor, which will not be described in detail here.

[0051] like Figure 8As shown, the upper mold sealing mechanism 2 includes a press-fitting frame 21, a connecting column 22 and a press-fitting master cylinder 23. The connecting column 22 is arranged on the main body 1, and the connecting column 22 is specifically arranged in four groups. The press-fitting frame 21 is slidably mounted on the connecting column 22 through the second connecting plate 24. The top plate of the press-fitting frame 21 is connected to the second connecting plate 24 by bolts. The press-fitting master cylinder 23 is arranged on the top plate of the main body 1. The piston rod of the press-fitting master cylinder 23 passes through the top plate of the main body 1 and is fixedly connected to the second connecting plate 24. The press-fitting master cylinder 23 is used to drive the press-fitting frame 21 to perform lifting movements on the connecting column 22.

[0052] Specific examples Figure 9 As shown, the template mounting position of the upper mold sealing mechanism 2 is set at the bottom of the press frame 21, and the template mounting position is the guide frame 3121. When any group of templates 4 is raised or lowered to be flush with the guide frame 3121 of the press frame 21, it stops. At this time, the guide frame 3121 on the storage rack 312 is flush with the guide frame 3121 on the press frame 21, which facilitates the transfer of the template 4 from the rear guide frame 3121 to the front guide frame 3121.

[0053] like Figure 9 As shown, a second positioning cylinder 211 is provided on the outer wall of the pressing frame 21, and a second positioning block 43 for cooperating with the second positioning cylinder 211 is provided on the template 4. The second positioning block 43 is provided with a second positioning hole 431, and the piston rod of the second positioning cylinder 211 is used to be inserted into the second positioning hole 431. When the template 4 is transferred to the pressing frame 21, the piston rod of the second positioning cylinder 211 extends out and is inserted into the second positioning hole 431 of the second positioning block 43 on the template 4 to ensure that the position of the template 4 is accurate. At the same time, when the pressing frame 21 drives the template 4 to move up and down, the second positioning cylinder 211 is inserted into the second positioning hole 431 to limit the template 4 to prevent the template 4 from horizontal displacement during the lifting process.

[0054] A method of using a drawer-type fixture template switching device is as follows:

[0055] Step 1. Pre-place the template: insert the template 4 to be used horizontally into the guide frame 3121 of the storage rack 312 in turn, and insert the piston cylinder of the first positioning cylinder 3123 of the corresponding layer into the first positioning hole 421 of the template 4 to ensure that the template 4 is placed in the correct position and limit the template 4 to prevent the template 4 from sliding horizontally.

[0056] Step 2. Select the template to be used: Select a matching template 4 according to the cavity shape of the surface of the workpiece to be inspected, and then use the lifting cylinder 313 to drive the storage rack 312 to rise and fall, so that the guide frame 3121 of the corresponding layer of the storage rack 312 is flush with the guide frame 3121 on the press frame 21. At this time, the connector 322 on the linear guide rail 321 is inserted into the U-shaped groove 422 of the template 4.

[0057] Step 3, pull the template onto the press-fitting frame: first retract the piston rod of the first positioning cylinder 3123, cancel the horizontal limit on the template 4, and then drive the slider on the linear guide rail 321 to move, the slider drives the connector 322 to move, and the connector 322 drives the template 4 to slide horizontally on the guide frame 3121, thereby moving the template 4 from the storage rack 312 to the guide frame 3121 of the press-fitting frame 21. After moving into place, the piston rod of the second positioning cylinder 211 is inserted into the second positioning hole 431 of the template 4 to position the template 4 to ensure the accuracy of the moving position, while limiting the template 4 from continuing to slide in the horizontal direction.

[0058] Step 4: Use the press-fitting frame to drive the template to move up and down to seal the workpiece to be tested below: When in use, the press-fitting main cylinder 23 drives the press-fitting frame 21 to move downward, causing the template 4 to move downward, thereby pressing and sealing the cavity on the surface of the workpiece to be tested, facilitating subsequent airtight and watertight testing operations.

[0059] Step 5: Pull the template back to the storage rack and reset it: After use, the main pressing cylinder 23 drives the pressing rack 21 to move upward and reset. At this time, the connector 322 on the linear guide 321 is inserted into the U-shaped groove 422 of the template 4 again. Then, the piston rod of the second positioning cylinder 211 is retracted to cancel the horizontal limit of the template 4. The linear guide 321 is then activated, and the slider of the linear guide 321 moves backward, pulling the template 4 to the guide frame 3121 of the storage rack 312. Finally, the first positioning cylinder 3123 is used to position and fix the template 4, limiting the horizontal displacement of the template 4. If another template 4 is needed, the storage rack 312 is raised and lowered again so that the template 4 is aligned with the guide frame 3121 of the pressing rack 21 and the connector 322 on the linear guide 321 is inserted into the U-shaped groove 422 of the template 4. Then, the other template 4 can be switched to the pressing rack 21.

[0060] Example 2

[0061] The difference between this embodiment and the first embodiment is that Figure 10-11 As shown, this embodiment also provides a water inspection machine with a drawer-type fixture template switching device, the water machine parts include a main body 1, an upper mold sealing mechanism 2 arranged on the main body 1, a template switching mechanism 3, a press-fitting station 5 and a lifting water tank 6; specifically, the press-fitting station 5 is located directly below the press-fitting frame 21, and the press-fitting station 5 is fixed to the bottom of the connecting column 22 through a mounting plate; a plurality of groups of clamping fixtures 51 are arranged on the mounting plate, and the clamping fixtures 51 are arranged along the circumference of the press-fitting station 5, for clamping the workpiece to be tested placed on the press-fitting station 5.

[0062] The lifting water tank 6 includes a water tank 6 and a lifting mechanism. The water tank 6 is located directly below the pressing station 5. The lifting mechanism is used to drive the water tank 6 to move upward so that the workpiece to be tested is immersed in the water tank 6; specifically, the lifting mechanism includes a lifting bracket 62 and a driving assembly 61. One side of the lifting bracket 62 is fixedly connected to the water tank 6, and the top of the lifting bracket 62 is passed through the connecting column 22 of the main body 1 through an extension bracket. When the lifting bracket 62 drives the water tank 6 to move up and down, the connecting column 22 guides and limits it; the outer side of the lifting bracket 62 is connected to the driving assembly 61, and the lifting bracket 62 is driven to move up and down by the driving assembly 61; specifically, the driving assembly 61 used in this embodiment adopts the existing chain-type lifting mechanism to drive the water tank 6 to move up and down. This embodiment does not improve this device and will not be described in detail here.

[0063] In order to perform airtightness detection on the workpiece to be tested, the interior of the template 4 is provided with an air passage for communicating with the chamber of the workpiece to be tested, and the top of the template 4 is provided with an air inlet 44; Figure 12-13 As shown, a sealing cylinder 7 is also provided on the outer wall of the pressing frame 21, and a sealing head 71 is provided on the piston rod of the sealing cylinder 7. The sealing head 71 is provided with an inflation port 711 and an air duct. When the piston rod of the sealing cylinder 7 moves downward, the sealing head 71 rests on the template 4, and the air duct of the sealing head 71 is connected to the air inlet 44 on the template 4.

[0064] When the workpiece to be tested is immersed in the water tank 6, air is inflated into the inflation port 711 of the sealing head 71. The gas follows the air channel of the sealing head 71, passes through the air inlet 44 of the template 4 and the air channel inside the template 4 in turn, and enters the cavity of the workpiece to be tested. Then observe whether there are bubbles in the water. If there are bubbles, it indicates that the workpiece is leaking. If there are no bubbles, it means that the workpiece has good air tightness and is a qualified product.

[0065] The above is only an embodiment of the present invention. The present invention is not limited to the field involved in this implementation case. Common knowledge such as the specific structure and characteristics of the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A drawer-type fixture template switching device, characterized in that: It includes a main body, and an upper mold sealing mechanism and a template switching mechanism arranged on the main body. The template switching mechanism is located behind the upper mold sealing mechanism. A template mounting position is provided on the upper mold sealing mechanism. The template switching mechanism includes a lifting frame and a pulling assembly arranged on both sides of the lifting frame, and the pulling assembly extends to both sides of the upper mold sealing mechanism; several layers of templates are arranged on the lifting frame in the vertical direction, and the pulling assembly is used to pull any template to the template mounting position of the upper mold sealing mechanism. The upper mold sealing mechanism is used to drive the template on its template mounting position to move downward to seal the upper surface of the workpiece.

2. A drawer-type fixture template switching device according to claim 1, characterized in that: The lifting frame includes a limiting column, a storage rack and a lifting drive component. The top of the limiting column is fixed on the top plate of the main body, the storage rack is slidably installed on the limiting column, and the lifting drive component is used to drive the storage rack to move up and down on the limiting column.

3. The drawer-type fixture template switching device according to claim 2, characterized in that: The pulling assembly includes a linear guide rail, which is arranged at the bottom of the limit column through a mounting plate; a connector is provided on the slider of the linear guide rail, and the connector is used to cooperate with the template for connection.

4. The drawer-type fixture template switching device according to claim 3, characterized in that: Several layers of guide frames for placing templates are arranged on two opposite side walls of the storage rack, and several first positioning cylinders are arranged on the outer side wall of the storage rack, and each layer of guide frames corresponds to a first positioning cylinder.

5. The drawer-type fixture template switching device according to claim 4, characterized in that: The upper surface of each template is symmetrically provided with a guide limit assembly and a plug-in block. The guide limit assembly includes a limit block. The limit block is provided with a guide wheel and a limit ball. The limit ball is located below the guide wheel. The guide wheel is slidingly provided on the guide frame. The limit ball is in rolling contact with the side wall of the guide frame. The plug-in block is provided with a U-shaped groove for cooperating with the plug-in part on the linear guide rail. The plug-in block is also provided with a first positioning hole for cooperating with the first positioning cylinder. The piston rod of the first positioning cylinder is used to be inserted into the first positioning hole.

6. The drawer-type fixture template switching device according to claim 5, characterized in that: The lifting drive component is a lifting cylinder or a screw assembly. When the lifting drive component is a lifting cylinder, the cylinder body of the lifting cylinder is set on the top plate of the main body, and the piston rod of the lifting cylinder is connected to the top plate of the storage rack; when the lifting drive component is a screw assembly, the screw assembly includes a screw and a motor, the top of the screw is fixedly set on the top plate of the main body, the storage rack is passed through the sleeve of the screw, and the motor is used to drive the screw to rotate.

7. A drawer-type fixture template switching device according to any one of claims 1 to 6, characterized in that: The upper mold sealing mechanism includes a press-fitting frame, a connecting column and a press-fitting master cylinder. The connecting column is arranged on the main body. The press-fitting frame is slidably mounted on the connecting column through a connecting plate. The press-fitting master cylinder is arranged on the top plate of the main body. The piston rod of the press-fitting master cylinder is fixedly connected to the connecting plate and is used to drive the press-fitting frame to move up and down on the connecting column.

8. The drawer-type fixture template switching device according to claim 7, characterized in that: The template mounting position is set at the bottom of the press-fitting frame, and the template mounting position is a guide frame; a second positioning cylinder is set on the outer side wall of the press-fitting frame, and a positioning block for cooperating with the second positioning cylinder is set on the template, and a second positioning hole is set on the positioning block, and the piston rod of the second positioning cylinder is used to be inserted into the second positioning hole.

9. The drawer-type fixture template switching device according to claim 8, characterized in that: The main body is also provided with a press-fitting station, which is located directly below the press-fitting frame and is fixed to the bottom of the connecting column through a mounting plate; a plurality of sets of clamping fixtures are provided on the mounting plate, and the clamping fixtures are arranged along the circumference of the press-fitting station for clamping the workpiece to be tested placed on the press-fitting station.

10. The drawer-type fixture template switching device according to claim 9, characterized in that: The main body is also provided with a lifting water tank, which includes a water tank and a lifting mechanism. The water tank is located directly below the press-fitting station, and the lifting mechanism is used to drive the water tank to move upward so that the workpiece to be tested is immersed in the water tank.

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