A test platform for testing light-cured resin in hot state deformation

Abstract

The utility model relates to 3D printing technical field especially relates to a kind of test platform for light-cured resin thermal deformation test, to solve the problem of low efficiency of existing equipment caused by motor drive, additional constraint to the movement of compression rod.The test platform for light-cured resin thermal deformation test includes substrate, material loading platform, test component and quick unloading device, wherein, mounting seat is equipped on substrate, material loading platform is installed on the lower side of substrate by support rod, test component includes compression rod, tray, displacement sensor, compression rod is connected tray by mounting seat, quick unloading device includes integrated seat, shaft seat, steering piece, turnover support block and support fork, support state and unloading state are switched by turnover support block, support fork is driven to realize the quick lifting of compression rod.The test platform for light-cured resin thermal deformation test does not need complex motor structure, improves the loading efficiency in test process, also avoids the constraint to compression rod, guarantees the test accuracy and reliability.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, and in particular to a testing platform for testing the thermal deformation of photocurable resin. Background Technology

[0002] With the rapid development of 3D printing technology, photocurable resins have been widely used in aerospace, medical devices, and precision manufacturing due to their advantages such as high molding precision and good surface quality. However, photocurable resin materials often face temperature variations during service, and their thermal deformation properties directly affect the dimensional stability and reliability of the product. Therefore, accurate thermal deformation testing of 3D printing photocurable resin materials is crucial.

[0003] Currently, the core function of thermal deformation testing equipment for photocurable resin materials is to simulate the deformation process of the material under constant mechanical load at a specific temperature and record the deformation data through sensors. In existing testing equipment, a motor-driven lifting structure is typically used to control the raising and lowering of the pressure bar to achieve sample loading and unloading. That is, when it is necessary to place or remove the sample, the motor drives the pressure bar upward through transmission components such as gears and lead screws to detach it from the loading platform. After the sample is installed, the motor drives the pressure bar back to the testing position in reverse.

[0004] However, this method of loading and unloading materials that relies on motor lifting has obvious drawbacks: On the one hand, the motor drive system not only increases the manufacturing cost of the equipment, but its complex transmission structure also reduces the loading and unloading efficiency. The start and stop of the motor and the response delay of the transmission components will prolong the preparation time for a single test. In particular, the problem of low efficiency is more prominent in batch testing scenarios. On the other hand, the mechanical linkage structure between the motor and the pressure bar will impose additional constraints on the movement of the pressure bar. For example, lateral forces during the transmission process and shaking caused by component gaps may interfere with the uniformity of the force applied by the pressure bar to the sample, or affect the accurate capture of deformation data by the displacement sensor, thereby reducing the reliability of the test results.

[0005] Therefore, there is an urgent need for a loading and unloading device for hot deformation testing that can improve loading and unloading efficiency and reduce restrictions on the movement of the pressure bar, in order to overcome the problems existing in the prior art. Utility Model Content

[0006] To overcome the technical problems of low loading and unloading efficiency and movement restriction of pressure bar in the existing technology for hot deformation testing, this utility model provides a test platform for testing the hot deformation of photocurable resin, including a substrate, a loading stage, test components, and a rapid unloading device; The substrate is provided with several mounting seats that penetrate the upper and lower surfaces. Each mounting seat has a through hole in the middle and several mounting holes on the top and bottom surfaces. The material carrier platform is assembled with the mounting holes on the bottom surface of the mounting base via support rods at both ends, and is located on the underside of the substrate; The surface of the loading platform is provided with several protrusions to provide deformation accommodating space; The test components include a pressure bar, a tray, and a displacement sensor; The pressure rod passes through the through hole in the middle of the mounting base, with its lower end extending toward the material loading platform and its upper end extending out of the mounting base to connect with the tray. The displacement sensor includes a sensing module, a mounting bracket, and a load rod; The sensing module is assembled onto the mounting base via a connector; The fixing frame is a pair of clamping structures located on the front side of the sensing module, which clamps the load rod and extends it into the upper space of the tray. The rapid force relief device includes an integrated base, a shaft base, a steering component, a tilting support block, and a support fork; The integrated base includes a flat plate section and a vertical pole section; The rear end of the flat plate is provided with the bearing seat, and the front end is provided with mounting holes for assembly with the mounting seat. The upright part has an L-shaped structure, with its bottom connected to the front end of the flat plate part and a through hole at its head; The steering component includes a rotating shaft, a mating seat, and a rotating lever; One end of the rotating shaft is positioned along the axis of the mating seat, and the other end passes through the through hole in the middle of the shaft seat and is connected to the flipping support block. The rotary lever is located on the side of the mating seat and is perpendicular to the rotating shaft. The flipping support block includes a support body and a hinged engagement part. The distance from the top surface of the support body to the axis of the hinged engagement part is greater than the distance from the outer edge of the hinged engagement part to its axis. The main support body is a cuboid structure with a height dimension greater than the width dimension of the test sample, and its bottom is connected to the semi-cylindrical hinged engagement part; The hinged engagement part is fixedly connected to the rotating shaft. By rotating the rotary lever, the position of the support body can be changed to a supporting state or a stress-relieving state through the rotating shaft. The support fork includes a connecting arm, a transmission plate, and a fork handle; One end of the connecting arm is coaxially assembled with the through hole at the head of the upright part, and the other end is connected to the transmission plate, located on the upper part of the flip support block; The transmission plate is provided with a fork at its end, which extends under the tray and clamps the pressure bar; When the flip support block turns to the support state, the bottom surface of the transmission plate contacts the support body and receives an upward support force, which drives the fork to lift up, and then lifts the pallet to pull the pressure rod up. When the flip support block turns to the unloading state, the bottom surface of the transmission plate contacts the hinged engagement part, and the transmission plate drives the fork to fall back, thereby driving the pressure rod to fall back.

[0007] In one embodiment, the flipping support block further includes a ball-head support foot, disposed on the outer edge of the hinged engagement portion, opposite to the support body; When the flip support block is in the supported state, the ball joint foot contacts the top surface of the mounting base to provide auxiliary support.

[0008] Furthermore, the steering component also includes a support foot, which is disposed on the side of the integrated base, perpendicular to the rotating shaft and the rotary lever, and parallel to the ball joint support foot; When the rotary lever is rotated to put the flip support block in a supported state, the bottom of the support leg contacts the base plate to provide auxiliary support.

[0009] In one embodiment, on both sides of the hinged engagement portion in the vertical direction of the axis, one side is flush with the support body, and the other side protrudes relative to the support body, forming a step with the sidewall of the support body on that side.

[0010] In one embodiment, the fork is tilted upward relative to the transmission plate and opens to both sides.

[0011] In one embodiment, the pressure bar includes a bar body and a pressure block; The pressure block includes a connecting seat and a pressure head; The connecting seat has a cubic structure, and the center of the structure is collinear with the axis of the rod. The pressure head has a trapezoidal prism structure, with the base dimension of the trapezoid being the same as the edge length of the connecting seat, and the top dimension being smaller than the edge length of the connecting seat.

[0012] Furthermore, the test assembly also includes a limiting rod; The top of the limiting rod is connected to the bottom of the mounting base, and the lower part is provided with a limiting groove, which can accommodate the sliding rod provided on the side of the rod body to realize the rotation limit of the pressure rod.

[0013] Furthermore, the length of the limiting rod is no more than 70% of the length of the pressure rod, and the length of the limiting groove is no more than 70% of the length of the limiting rod.

[0014] In one embodiment, the tray has a retaining edge on its upper periphery and an isolation sleeve at its lower center; The inner side of the isolation sleeve is fitted onto the top of the pressure rod, while the outer side can contact the fork handle, thus isolating the fork handle from the direct action of the pressure rod.

[0015] In one embodiment, the substrate is further provided with lugs on both sides, which can be connected to linear guide rods for controlling the lifting and lowering of the test platform.

[0016] In summary, compared with the prior art, the utility model has the following beneficial effects: The testing platform for testing the thermal deformation of photocurable resin provided by this utility model effectively overcomes the problems of low loading and unloading efficiency and additional constraints on the movement of pressure rods caused by the reliance on motor drive in the prior art.

[0017] Among them, the flip support block of the quick unloading device can quickly switch between the support state and the unloading state through the structural design of the support body and the hinged engagement part, and with the operation of the rotating lever, it can drive the fork of the support fork to realize the rapid lifting and lowering of the pressure bar. It does not require a complex motor transmission structure, which greatly improves the sample loading and unloading efficiency, and is especially suitable for batch testing scenarios.

[0018] Meanwhile, the isolation sleeve design of the support fork can avoid the direct action of the fork handle on the pressure bar. The cooperation between the limit rod and the slide rod restricts the rotation of the pressure bar without affecting its up and down movement, reducing additional constraints on the movement of the pressure bar, ensuring that the pressure bar applies force evenly to the sample, ensuring the accuracy of the displacement sensor in capturing deformation data, and improving the reliability of the test results. Attached Figure Description

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

[0020] Figure 1 This is a schematic diagram of the test platform for testing the thermal deformation of photocurable resin according to the present invention; Figure 2 This is a schematic diagram of the assembly of the mounting base and the base plate described in this utility model; Figure 3 This is a schematic diagram of the material carrier platform described in this utility model; Figure 4 This is a schematic diagram of the structure of the test component described in this utility model; Figure 5 This is a schematic diagram of the structure of the rapid force unloading device described in this utility model; Figure 6 This is a schematic diagram of the steering component described in this utility model; Figure 7 This is a schematic diagram of the structure of the flipping support block described in this utility model; Figure 8 This is an assembly diagram of the rapid force unloading device in its initial state according to this utility model; Figure 9 This is an assembly diagram showing the working state of the rapid force relief device described in this utility model.

[0021] Figure label: 110-Substrate; 111-Mounting base; 111a-Upper part of the board; 111b-Lower part of the board; 112-Ear seat; 120-Material loading platform; 121-Support rod; 122-Boss; 200-Test assembly; 210-Pressure rod; 211-Rod body; 212-Pressure block; 212a-Connecting seat; 212b-Pressure head; 213-Slide rod; 220-Pattern; 221-Side guard; 222-Isolation sleeve; 230-Displacement sensor; 231-Sensing module; 232-Fixing bracket; 233- 240-Limit rod; 241-Limit groove; 300-Quick unloading device; 310-Integrated seat; 311-Plate section; 312-Upright section; 320-Shaft seat; 330-Steering component; 331-Rotating shaft; 332-Matching seat; 333-Rotating lever; 334-Foot support; 340-Flipping support block; 341-Support body; 342-Hinged engagement section; 343-Ball head foot; 350-Support fork; 351-Connecting arm; 352-Transmission plate; 353-Fork handle. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] In the description of this utility model, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "top surface", "bottom surface", "upper part", "lower part", "top", "bottom", "above", "below", "lower side", "upper side", "front end", "rear end", "head", "tail", "both sides", "both ends", "middle part", "center", "side", "periphery", "outer edge", "inner side", "outer side", "front side", "rear side", "vertical direction", "axial direction", "horizontal", "vertical", "opposite", "facing", "towards", "closer", "away from", "through", "extend", "reach in", "extend", "sleeve", "contact", "connect", "assemble", "clamp", "fork clamp", "form" are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Example 1 This embodiment provides a testing platform for testing the thermal deformation of photocurable resins. (See attached document.) Figure 1 As shown, it includes a substrate 110, a loading stage 120, a test assembly 200, and a rapid unloading device 300.

[0025] The substrate 110 is provided with a plurality of mounting bases 111, each mounting base 111 having a through hole in the center and a plurality of mounting holes on its upper and lower surfaces, providing an assembly base for the material loading platform 120, the test assembly 200 and the quick unloading device 300. For more details, please refer to Figure 2 As shown, the mounting base 111 includes an upper plate 111a and a lower plate 111b, wherein the projected area of ​​the upper plate 111a is larger than that of the lower plate 111b, the upper plate 111a is entirely located on the upper side of the substrate 110, and the lower plate 111b is partially located inside the substrate 110 and partially extends out of the bottom surface of the substrate 110 and is located below it. The base plate 110 has symmetrical ear seats 112 on both sides, which can ensure the force balance during the lifting process when connected to the linear guide rod, and avoid the test reference shift due to off-center load.

[0026] The loading platform 120 is suspended from the mounting base 111 by the support rods 121 at both ends, ensuring that the surface of the loading platform 120 remains parallel to the substrate 110; See Figure 3 As shown, the surface of the loading stage 120 is provided with several protrusions 122 at intervals, which are evenly distributed on both sides of the loading stage 120. The middle part is a space for accommodating the hot deformation of the strip sample. The space can prevent the sample from having too much contact with the surface of the loading stage 120 during the deformation process, thus affecting the test results.

[0027] See Figure 4 As shown, the test assembly 200 includes a pressure bar 210, a tray 220, a displacement sensor 230, and a limit bar 240; Among them, the top of the rod body 211 of the pressure rod 210 passes through the through hole in the center of the mounting base 111 and is connected to the tray 220, and the bottom is provided with a pressure block 212; The pressure block 212 includes a cubic connecting seat 212a and a trapezoidal prism pressure head 212b; Preferably, the indenter 212b is an isosceles trapezoidal prism structure. For strip-shaped samples, the smaller top edge size can accurately act on the test area of ​​the sample, while the gradually expanding bottom edge allows the force to be transmitted evenly through the connecting seat 212a, avoiding stress concentration.

[0028] The top of the limiting rod 240 is connected to the mounting base 111, and the lower part is provided with a limiting groove 241; In this embodiment, preferably, the limiting groove 241 is a through groove; In practical use, the cooperation between the limiting groove 241 and the sliding rod 213 on the rod body 211 not only restricts the rotational freedom of the pressure rod 210, ensuring that the pressure head 212b is always facing the test position of the sample, but also restricts the vertical movement space of the pressure rod 210 by the length of the limiting groove 241. During assembly, the pressure rod 210 is passed through the through hole in the middle of the mounting base 111, the slide rod 213 on the side of the rod 211 is oriented toward the mounting point of the limiting rod 240, the lower pressure block 212 is aligned with the center area of ​​the loading platform 120, and the upper end is connected and fixed to the tray 220. After the limiting groove 241 is engaged with the slide rod 213, the limiting rod 240 is then assembled onto the mounting point at the bottom of the mounting base 111.

[0029] In this embodiment, more preferably, the upper periphery of the tray 220 is provided with a retaining edge 221, and the lower center is provided with an isolation sleeve 222. The inner side of the isolation sleeve 222 is fitted with the top of the pressure rod 210, and the outer side can contact the fork handle 353, thus isolating the fork handle 353 from direct impact on the pressure rod 210.

[0030] The displacement sensor 230 includes a sensing module 231, a fixing frame 232, and a load rod 233; The fixing frame 232 adopts a clamping structure, which can clamp the load bar 233, extend into the upper space of the tray 220, and keep the load bar 233 vertically aligned with the tray 220; In practical use, weights are usually placed on the tray 220, and the bottom of the load rod 233 contacts the weights. As the sample softens and deforms, the load rod 233 will move accordingly, and the displacement information will be captured and analyzed by the sensing module 231.

[0031] The rapid stress relief device 300 can significantly improve the efficiency of sample replacement. (See attached document.) Figure 5 As shown, it includes an integrated base 310, a shaft base 320, a steering component 330, a flip support block 340, and a support fork 350.

[0032] The flat plate portion 311 and the upright portion 312 of the integrated base 310 not only meet the integrated installation requirements of the bearing 320, the steering component 330, and the flip support block 340 in the horizontal direction, but also provide the installation base for the support fork 350 in the vertical direction. Specifically, the upright part 312 has an L-shaped structure, and the head is coaxially assembled with the rotation axis of the support fork 350, so that the support fork 350 can rotate around the axis when adjusted by the flip support block 340. Preferably, the top height of the upright part 312 is the same as the top height of the flip support block 340 when it is in the supported state.

[0033] See Figure 6 As shown, the steering component 330 includes a rotating shaft 331, a mating seat 332, a rotary lever 333, and a support leg 334. The rotary lever 333, the rotating shaft 331, and the support leg 334 form a perpendicular orthogonal position on the mating seat 332. The operator can switch the state of the flip support block 340 by rotating the rotary lever 333.

[0034] See Figure 7 As shown, the flip support block 340 includes a support body 341, a hinged engagement part 342, and a ball-head support leg 343. The support body 341 is a cuboid structure, and its height is greater than the width of the test sample. The distance from the top surface to the axis of the hinged engagement part 342 is greater than the distance from the outer edge of the hinged engagement part 342 to its axis. This ensures that it can provide sufficient support height for the transmission plate 352 in the supported state, so that the pressure rod 210 can be completely separated from the loading platform 120, which facilitates the loading and unloading of the sample. In the unloading state, it generates a sufficient height difference to achieve unloading. In this embodiment, when the flip support block 340 is in the supported state, refer to... Figure 8 As shown, ball joint feet 343 and 334 contact the top surface of mounting base 111 and the surface of substrate 110 respectively, forming auxiliary support, distributing the load borne by the flip support block 340 to substrate 110, and avoiding local structural fatigue of the rotating shaft 331 due to long-term use. The hinged engagement part 342 has a semi-cylindrical structure, which can form a line contact with the transmission plate 352 when the force is unloaded, reducing the contact area and frictional resistance, and the pressure rod 210 can fall back smoothly by its own weight. In this embodiment, more preferably, one side of the hinged engagement portion 342 is further provided with a stepped structure that retracts towards the axis, which can further increase the turning angle of the flip support block 340 when it is in the stress-relieving state. See details. Figure 9 As shown.

[0035] The support fork 350 includes a connecting arm 351, a transmission plate 352, and a fork handle 353. The tail end of the connecting arm 351 is rotatably connected to the head of the upright part 312, and the other end is connected to the transmission plate 352. In this embodiment, preferably, the transmission plate 352 has a transition slope on the side near the connecting arm 351, which not only provides space for the assembly of the connecting arm 351, but also avoids local rigidity deficiency and increases the service life of the structure. See Figure 8 As shown, the fork handle 353 adopts a structural design that tilts upward relative to the transmission plate 352 and opens to both sides, so that it can be easily fitted under the pallet 220, while reducing rigid collisions with the pressure bar 210.

[0036] During the actual test, the operator rotates the rotary lever 333, which drives the rotating support block 340 to rotate via the rotating shaft 331. This causes the support body 341 to gradually contact the bottom surface of the transmission plate 352. As the rotation angle increases, the support body 341 lifts the transmission plate 352 upward. Through the lever action of the connecting arm 351, the fork arm 353 drives the tray 220 and the pressure bar 210 to rise synchronously. At this time, the pressure head 212b is completely detached from the loading platform 120, and the operator can easily place the strip sample. After the sample is placed, the rotary lever 333 is rotated in the opposite direction, and the rotating support block 340 rotates to the unloaded state. The support body 341 is detached from the transmission plate 352, and the transmission plate 352 falls back under the action of gravity. The pressure bar 210 falls naturally, allowing the pressure head 212b to smoothly contact the sample surface, which greatly improves the loading and unloading efficiency.

[0037] Although this document frequently uses terms such as substrate, mounting base, ear seat, loading platform, support rod, boss, test assembly, pressure rod, rod body, pressure block, connecting seat, pressure head, slide rod, tray, edge, isolation sleeve, displacement sensor, sensing module, fixing frame, load rod, limit rod, limit groove, quick unloading device, integrated base, flat plate part, upright part, shaft seat, steering component, rotating shaft, mating seat, rotary lever, support leg, flip support block, support body, hinged engagement part, ball head support leg, support fork, connecting arm, transmission plate, fork handle, upper plate, lower plate, support state, unloading state, deformation accommodating space, mounting hole position, through hole, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A testing platform for testing the thermal deformation of photocurable resins, characterized in that: Includes a substrate (110), a loading stage (120), a test assembly (200), and a rapid unloading device (300). The substrate (110) is provided with a plurality of mounting seats (111) that penetrate the upper and lower surfaces. The mounting seat (111) has a through hole in the middle and a plurality of mounting holes on the top and bottom surfaces respectively. The material carrier (120) is assembled with the mounting holes on the bottom surface of the mounting base (111) by the support rods (121) at both ends, and is located on the underside of the substrate (110). The surface of the loading platform (120) is provided with a plurality of protrusions (122) for providing deformation accommodating space; The test assembly (200) includes a pressure bar (210), a tray (220), and a displacement sensor (230). The pressure bar (210) passes through the through hole in the middle of the mounting base (111), with its lower end extending toward the material carrier (120) and its upper end extending out of the mounting base (111) to connect with the tray (220); The displacement sensor (230) includes a sensing module (231), a fixing frame (232), and a load rod (233). The sensing module (231) is assembled on the mounting base (111) via a connector; The fixing frame (232) is a pair of clamping structures, located on the front side of the sensing module (231), clamping the load rod (233) and extending into the upper space of the tray (220); The rapid unloading device (300) includes an integrated base (310), a shaft base (320), a steering component (330), a flip support block (340), and a support fork (350); The integrated base (310) includes a flat plate (311) and a vertical pole (312). The rear end of the flat plate (311) is provided with the bearing seat (320), and the front end is provided with mounting holes to be assembled with the mounting seat (111); The upright part (312) has an L-shaped structure, with its bottom connected to the front end of the flat plate part (311), and a through hole at its head; The steering component (330) includes a rotating shaft (331), a mating seat (332), and a rotating lever (333). One end of the rotating shaft (331) is located on the axial direction of the mating seat (332), and the other end passes through the through hole in the middle of the shaft seat (320) and is connected to the flip support block (340); The rotary lever (333) is located on the side of the mating seat (332) and is perpendicular to the rotating shaft (331); The flip support block (340) includes a support body (341) and a hinged engagement part (342). The distance from the top surface of the support body (341) to the axis of the hinged engagement part (342) is greater than the distance from the outer edge of the hinged engagement part (342) to its axis. The supporting body (341) is a cuboid structure with a height dimension greater than the width dimension of the test sample, and its bottom is connected to the semi-cylindrical hinged part (342); The hinged engagement part (342) is fixedly connected to the rotating shaft (331). By rotating the rotary lever (333), the position of the support body (341) can be changed to a supporting state or a stress-relieving state through the rotating shaft (331). The support fork (350) includes a connecting arm (351), a transmission plate (352), and a fork handle (353); One end of the connecting arm (351) is coaxially assembled with the through hole at the head of the upright part (312), and the other end is connected to the transmission plate (352), located on the upper part of the flip support block (340); The transmission plate (352) is provided with a fork (353) at its end. The fork (353) extends under the tray (220) and clamps the pressure bar (210). When the flip support block (340) turns to the support state, the bottom surface of the transmission plate (352) contacts the support body (341) and is subjected to an upward support force, which drives the fork handle (353) to lift up, and then pulls the pressure rod (210) to lift up by lifting the pallet (220); When the flip support block (340) turns to the unloading state, the bottom surface of the transmission plate (352) contacts the hinged engagement part (342), the transmission plate (352) drives the fork (353) to fall back, and then drives the pressure rod (210) to fall back.

2. The testing platform for testing the thermal deformation of photocurable resin according to claim 1, characterized in that: The flip support block (340) also includes a ball head support (343), which is located on the outer edge of the hinged engagement part (342) and opposite to the support body (341); When the flip support block (340) is in the supported state, the head of the ball-head support (343) contacts the top surface of the mounting base (111) to provide auxiliary support.

3. The testing platform for testing the thermal deformation of photocurable resin according to claim 2, characterized in that: The steering component (330) also includes a support foot (334), which is located on the side of the mating seat (332), perpendicular to the rotating shaft (331) and the rotary lever (333), and parallel to the ball head support foot (343); When the rotary lever (333) is rotated to put the flip support block (340) in a supported state, the bottom of the support leg (334) contacts the base plate (110) to provide auxiliary support.

4. The testing platform for testing the thermal deformation of photocurable resin according to claim 1, characterized in that: On both sides of the hinged engagement part (342) in the vertical direction of the axis, one side is flush with the support body (341), and the other side protrudes relative to the support body (341), forming a step with the side wall of the support body (341).

5. The testing platform for testing the thermal deformation of photocurable resin according to claim 1, characterized in that: The fork handle (353) is tilted upward relative to the transmission plate (352) and opens to both sides.

6. The testing platform for testing the thermal deformation of photocurable resin according to claim 1, characterized in that: The pressure bar (210) includes a bar body (211) and a pressure block (212); The pressure block (212) includes a connecting seat (212a) and a pressure head (212b); The connecting seat (212a) is a cubic structure, and the center of the structure is collinear with the axis of the rod (211); The pressure head (212b) is a trapezoidal prism structure. The size of the base of the trapezoid is the same as the length of the edge of the connecting seat (212a), and the size of the top edge is smaller than the length of the edge of the connecting seat (212a).

7. The testing platform for testing the thermal deformation of photocurable resin according to claim 6, characterized in that: The test assembly (200) also includes a limiting rod (240); The top of the limiting rod (240) is connected to the bottom of the mounting base (111), and the lower part is provided with a limiting groove (241) to accommodate the sliding rod (213) provided on the side of the rod body (211) to realize the rotation limit of the pressure rod (210).

8. The testing platform for testing the thermal deformation of photocurable resin according to claim 7, characterized in that: The length of the limiting rod (240) is no greater than 50% of the length of the pressure rod (210), and the length of the limiting groove (241) is no greater than 50% of the length of the limiting rod (240).

9. The testing platform for testing the thermal deformation of photocurable resin according to claim 1, characterized in that: The tray (220) has a retaining edge (221) on the upper periphery and an isolation sleeve (222) at the lower center. The inner side of the isolation sleeve (222) is fitted onto the top of the pressure rod (210), and the outer side can contact the fork handle (353) to isolate the direct action of the fork handle (353) on the pressure rod (210).

10. The testing platform for testing the thermal deformation of photocurable resin according to claim 1, characterized in that: The substrate (110) is also provided with ear seats (112) on both sides, which can be connected to linear guide rods for controlling the lifting and lowering of the test platform.

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