CN111811906A

CN111811906A - Sample preparation and performance testing device and method for large-size glued joint member

Info

Publication number: CN111811906A
Application number: CN202010754516.0A
Authority: CN
Inventors: 孔谅; 王志远; 张悦; 邵云; 谭天雨; 王敏; 李芳�; 华学明
Original assignee: Shanghai Jiaotong University; Huayu Automotive Body Components Technology Shanghai Co Ltd
Current assignee: Shanghai Jiaotong University; Huayu Automotive Body Components Technology Shanghai Co Ltd
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2020-10-23

Abstract

The invention relates to a sample preparation and performance test device and method for a large-size glued joint member, wherein the device comprises: a frame body; an upper fixing mechanism arranged at the upper part of the frame body; a lower fixing workbench fixedly arranged at the lower part of the frame body; a movable table located directly above the lower stationary table: the lifting driving part is connected with a moving part of a lifting driving part arranged on the upper fixing mechanism and is driven by the lifting driving part to vertically lift above the lower fixing workbench; heating the assembly: the heating device is respectively arranged on the lower fixed workbench and the movable workbench and is used for heating a part to be glued; a vacuum adsorption component: the device is respectively arranged on the lower fixing table and the movable workbench and used for adsorbing and fixing the gluing component to be tested during sample preparation or performance test. Compared with the prior art, the preparation of the sample and the mechanical property test have high precision, and the adaptability and the accuracy of the preparation of the sample of the large-size cementing component and the performance test can be effectively realized.

Description

Sample preparation and performance testing device and method for large-size glued joint member

Technical Field

The invention belongs to the technical field of preparation and performance test of large-size glued joint members, and relates to a device and a method for preparing a sample of a large-size glued joint member and testing the performance of the large-size glued joint member.

Background

The adhesive bonding component is a structural form which connects two objects by using an adhesive and has certain strength. Compared with the traditional connection modes such as welding, riveting and the like, the large-size glue joint structure has continuous surface connection, uniform stress distribution of components, light structure quality, high strength and good fatigue resistance, and is widely applied to the fields of automobiles, ships, aerospace, building materials and the like.

The strength of the adhesive joint member is affected by various factors, wherein the thickness of the adhesive layer has a large influence on the strength of the adhesive joint, the adhesive adopted by the adhesive joint member is various, and each adhesive has a proper thickness range. At present, the commonly used method for confirming the glue layer thickness of the gluing component is as follows: firstly, aiming at a selected adhesive, connecting auxiliary materials are bonded together according to a certain relative position relationship, a small sample overlap joint is adopted to determine the appropriate adhesive layer thickness (generally, the overlap width is 25mm), and then the overlap joint is subjected to mechanical tests of bonding performance such as a pull-shear test or a peeling test, and the corresponding performance index parameters are obtained. The manufacture of the glue joint sample generally adopts the addition of a standard gasket to control the thickness of a glue layer, but the control repetition precision of the thickness of the glue layer is poorer; or the glass beads are arranged between the two gluing pieces to control the thickness of the glue layer, but bubbles or glue shortage caused by the existence of the glass beads exist in the glue layer to influence the gluing strength.

Patent CN110470523A discloses a method for controlling the thickness of a glue layer in the manufacture of a glue joint test sample with a conductive structure, which judges whether the glue layer between the bonded pieces in a shop is filled up by the pressure applied to a glue joint clamp monitored by a pressure sensor, and determines the thickness of the glue layer of the glue joint sample by a displacement sensor. Disclose a frock of gluing in the patent CN108340295B, its adopts the height-adjustable's that has shaft and worm mechanism base, changes the distance between the examination board that glues, through the clearance between the pre-control examination board, the purpose of accurate control gluing thickness is realized to the gluey thickness of active control among the process of gluing. In the bonding device capable of accurately controlling the thickness of the glue layer of the butt joint and the use method disclosed in patent CN107817148A, a method for controlling the thickness precision of the glue layer by adjusting a linearly moving slide block by a screw rod and indicating the sliding displacement by matching with a graduated scale is provided.

The method and the technology for controlling the thickness of the adhesive layer adopt a lap joint form of a small test plate, and subsequent joint performance mechanical tests also adopt test data of a pull-shear test or a peeling test and the like to evaluate the joint performance. In addition, the performance parameters of the glued joint, except for a tension-shear test or a peeling test, are also an important index of the positive tensile mechanical performance of the joint, and because the lap width in the conventional lap joint sample preparation is small (25mm), and the part materials adopted for gluing are relatively thin, the positive tensile mechanical performance test of the glued joint surface is difficult to be carried out by adopting the conventional clamping mode. The interface positive pulling test method of the small sample of the glued joint comprises the following steps: the outer side surface of the small-sized adhesive joint sample is connected with a simple tool capable of being clamped through another adhesive with the strength higher than that of the adhesive to be tested, and then a forward pull test is carried out.

Therefore, the existing glue layer thickness test method for the small-sized sample is not suitable for the test and performance test research of the large-sized glued joint member, and the preparation and mechanical performance test results of the glue layer thickness test method are difficult to comprehensively reflect the integral performance of the joint interface of the large-area glued joint member. Because the gluing contact area of the large-size gluing component is large, even if the glue layers of the identical small samples are adopted to control the process parameters, if the gluing process and the process control measures are improper, the defects of glue shortage, weak connection and the like are easily generated on the large-area gluing surface, and the defects can be expanded during the use of the product, so that the product is scrapped.

Accordingly, the present invention has been made in view of the above problems.

Disclosure of Invention

The invention aims to provide a sample preparation and performance test device and method for a large-size gluing component, which are high in efficiency and accurate and controllable in gluing thickness.

The purpose of the invention can be realized by the following technical scheme:

the sample of the large-size glued component in the invention refers to the glued surface with a larger area in the component, and the size range of the glued surface is as follows: the minimum is 500mm multiplied by 500mm, and the maximum cementing area is 1000mm multiplied by 10000 mm.

One of the technical schemes of the invention provides a sample preparation and performance test device for a large-size cementing component, which comprises:

a frame body;

an upper fixing mechanism arranged at the upper part of the frame body;

a lower fixing workbench fixedly arranged at the lower part of the frame body;

a movable table located directly above the lower stationary table: the lifting driving part is connected with a moving part of a lifting driving part arranged on the upper fixing mechanism and is driven by the lifting driving part to vertically lift above the lower fixing workbench;

heating the assembly: the heating device is respectively arranged on the lower fixed workbench and the movable workbench and is used for heating a part to be glued;

a vacuum adsorption component: the adhesive bonding member is respectively arranged on the lower fixing table and the movable workbench and used for adsorbing and fixing the adhesive bonding member to be tested during performance test.

The sample preparation and performance test device can realize two functions of the sample of the large-size gluing component on one device, one is the preparation function of the sample of the large-size gluing component, and the accurate control of the glue layer thickness of the gluing interface of the sample of the large-size gluing component under the conditions of different gluing temperatures and different pressing forces is realized in the preparation process of the sample of the large-size gluing component; the second is the function of testing the performance of the adhesive joint of the sample of the large-size adhesive member, so that the forward pulling performance test of the two adhered parts of the sample of the large-size adhesive member which is adhered at different adhesive layer temperatures and/or different temperatures is realized.

Furthermore, the device also comprises a synchronous lifting assembly, the synchronous lifting assembly comprises a helical rack arranged on the frame body in the vertical direction and four synchronous shafts horizontally arranged on the movable workbench, each synchronous shaft consists of a pair of parallel synchronous driving shafts and a pair of parallel synchronous driven shafts which are oppositely arranged in pairs, the synchronous driving shafts and the synchronous driven shafts are mutually meshed by adopting first helical gears to realize the synchronous and same-angle rotation of the four synchronous shafts, and second helical gears meshed with the helical rack are further arranged on the two synchronous driving shafts. The synchronous lifting assembly can control the synchronous lifting of each plane position in the lifting process of the movable workbench, ensure that the working surface of the movable workbench is parallel to the working surface of the fixed workbench at any position, and inhibit the flatness deviation and torsion between the working surfaces of the two workbenches caused by uneven stress in the up-and-down movement of the large-size workbench; the thickness consistency of the glue layer on the whole large-size gluing contact surface in the pressing preparation process of the sample of the large-size gluing member is ensured, the stress direction of the sample of the large-size gluing member in the whole forward pulling test process is always perpendicular to the interface of the cross-over joint, the error caused by the tearing condition generated on the interface of the cross-over joint due to the deflection of the stress direction is reduced, and the reliability of test data is ensured. The synchronous lifting assembly is of a passive driving structure and is connected with the movable workbench, and when the lifting driving assembly drives the movable workbench to move, the synchronous lifting assembly is lifted together with the movable workbench.

Furthermore, the end part of the synchronous driving shaft is also provided with two rotary encoders (namely two rotary encoders are respectively arranged at the two synchronous driving shaft end angle positions of the synchronous lifting assembly) for monitoring the synchronous running state of the synchronous lifting assembly, thereby ensuring the parallelism between the movable workbench and the working surface of the fixed workbench in the moving or stress process.

Furthermore, the device also comprises a lifting guide assembly which comprises a guide post vertically arranged on the rack body and a guide sleeve fixed on the mobile platform and matched with the guide post in a sliding manner. It can cooperate synchronous lifting unit to control the synchronous lifting effect of the lifting process of the movable working table.

Furthermore, the movable workbench is also provided with a height displacement sensor and is used for monitoring the actual displacement position of the movable workbench. The height displacement sensor can be a linear displacement sensor such as a grating ruler and a pull rope sensor and is used for monitoring and adjusting the actual displacement position of the movable workbench, so that the glue layer thickness of the glue joint interface is controlled, and the height displacement sensor is also used for recording displacement data of the positive tension performance testing process in real time.

Furthermore, a force sensor is arranged between the movable workbench and the lifting driving piece. The force sensor has two modes of tension and pressure. The method is used for obtaining mechanical parameters of sample preparation and performance test of the large-size glued joint member, such as the relation between the pressing force and the glue layer thickness under the specific temperature condition in the preparation process, the relation between the glue layer thickness and the tension and the displacement in the positive tension mechanical performance test process at the specific temperature, the maximum positive tension breaking force in the glue layer thickness and the positive tension mechanical performance test process at the specific temperature and the like.

Furthermore, the device also comprises a plurality of groups of detection displacement sensors which are respectively arranged on the lower fixed workbench and the movable workbench in pairs and correspond to the measuring point positions, namely, each group of detection displacement sensors is arranged on the lower fixed workbench and the movable workbench in a way of corresponding to the measuring point positions. In the sample preparation process, the detection displacement sensor is used for measuring the actual thickness of the part to be glued, the accurate displacement of the movable workbench is determined and controlled through calculation, and the control accuracy of the glue layer thickness of the gluing interface is ensured; the detection displacement sensor is also used for monitoring the fitting state of the sample with the working surfaces of the lower fixed workbench and the movable workbench in the performance test process; the detection sensor is a contact position sensor, so that the influence of air holes, burrs, micro pits and the like on the precision of large-size glued parts is avoided. In addition, the diagonal line of the lower fixed workbench is also provided with 4 contact type displacement sensors for calibrating and calibrating the origin position of the movable workbench. The contact type displacement sensor comprises a body and a measuring head, wherein the measuring head can be elastically compressed into the body within a measuring range in the measuring direction, and the resilience force of the contact type displacement sensor during elastic compression is optimally not less than 1 Newton, so that the influence of burrs on the surface of a workpiece on the detection precision can be avoided.

Furthermore, the heating assembly comprises a heating plate with controllable temperature, which is arranged on the inner side of the working surface of the lower fixed working table or the movable working table, and the working surfaces of the lower fixed working table and the movable working table are made of heat conducting materials. The heating plate is arranged on the inner sides of working surfaces on the lower fixed workbench and the movable workbench and is not in direct contact with the glued parts to be tested, the working surfaces on the lower fixed workbench and the movable workbench are in contact with and attached to the upper glued part and the lower glued part in the using process, the working surfaces on the workbench are heated by the heating assembly, the working surfaces on the workbench are made of materials with good heat conduction and certain wear resistance, such as copper materials, so that the whole working surfaces on the workbench are uniformly heated, the two glued parts are uniformly heated by the working surfaces on the workbench, and the phenomenon of nonuniform heating caused by the fact that the heating assembly directly heats the glued parts is avoided; the temperature is set to adjust and detect the temperature of the upper and lower parts to be glued; in the process of preparing the sample, the temperature of the adhesive in the process of preparing and pressing is indirectly adjusted and detected, and in the process of testing the performance, the temperature of the adhesive layer of the glued component is indirectly adjusted by setting the temperature, so that the method is used for testing the gluing mechanical performance of the adhesive layer and/or the two glued components at different temperatures.

Furthermore, when the sample of the large-size gluing member is prepared, the movable workbench is driven by the linear lifting driving assembly to move downwards, so that the control of the pressing position and the pressing pressure of the large-size gluing member for simulating the sample preparation is realized, and different glue layer thicknesses are obtained. When the positive tension mechanical performance of the sample of the large-size gluing component is tested, the movable workbench is driven by the linear lifting driving assembly to move upwards, so that the positive tension displacement and the positive tension of the simulated sample of the large-size gluing component are controlled, and the positive tension mechanical performance parameters of the simulated sample gluing joint of the large-size gluing component are obtained.

Furthermore, the vacuum adsorption component comprises an adsorption lifting unit arranged on the movable workbench or the lower fixed workbench and vacuum chucks arranged on the adsorption lifting unit, and each vacuum chuck is connected with external vacuum generating equipment through a vacuum pipeline; when the performance test of the glued joint component is carried out, the vacuum chuck is driven by the adsorption lifting unit to extend out to a position exceeding the working surface of the lower fixed workbench or the movable workbench; and in other states, the vacuum chuck is driven by the adsorption lifting unit to return to a position lower than the working surface of the lower fixed workbench or the movable workbench. The vacuum suction assemblies are preferably arranged on the movable worktable and the lower fixed worktable in an array form, each vacuum suction cup is provided with negative pressure by a vacuum pipeline and external vacuum generating equipment, and the vacuum suction cups are preferably independently controlled by a control system so as to be convenient for adapting to tested samples with different sizes.

When the overall performance of a sample of a large-size adhesive member is tested, the sucker on the vacuum adsorption assembly on the lower fixed workbench adsorbs a lower-layer part of the tested sample, the sucker of the vacuum adsorption assembly on the movable workbench adsorbs an upper-layer part of the tested sample, the linear lifting driving assembly drives the movable workbench to move upwards according to a set test speed, a forward-pulling performance test (such as each performance mechanical performance test in claim 2) of the adhesive joint is carried out, and the adhesive performance under each parameter is tested.

The vacuum adsorption components on the fixed workbench and the movable workbench are provided with lifting units, when the sample preparation of the large-size gluing component is carried out, the lifting units on the vacuum adsorption components drive the vacuum chuck to return to a working surface lower than the lower fixed workbench or the movable workbench, so that the spatial interference of the sample in the pressing preparation is avoided; when the integral positive tension mechanical performance test of the sample of the large-size glued component is carried out, the lifting unit on the vacuum adsorption assembly drives the vacuum chuck to extend out to a working surface higher than the lower fixed workbench or the movable workbench, after the vacuum chuck of the vacuum adsorption assembly adsorbs an upper layer part and a lower layer part of the tested sample, the lifting unit on the vacuum adsorption assembly drives the vacuum chuck to return, so that the adsorption surfaces of the upper part and the lower part of the tested sample are tightly attached to the working surfaces of the workbenches, and the tension-displacement relation curve is used for carrying out the integral positive tension mechanical performance test process of the sample.

The vacuum adsorption force in the test process and the return holding force of the lifting unit on the vacuum adsorption assembly are 1.3-2 times of the maximum breaking force in the whole forward pulling process of the sample, and the actual mechanical property value of the sample to be tested is independently adjusted.

Optionally, the prepared sample of the large-size gluing member can be cut and sampled according to different areas to obtain small samples, the glue layer thickness of each area is measured, and then the positive tensile property test is performed on each cut small sample to obtain the glue layer thickness of each area and the corresponding positive tensile mechanical property parameter.

Furthermore, the device of the invention can also comprise a control system which can be composed of a PLC controller and upper computer software, wherein the PLC controller controls each movement axis, pneumatic components, sensor data acquisition and data calculation of the device; the upper computer software realizes communication with the PLC, establishment of a measuring point measuring sequence, data entry, parameter setting and selection of a measuring formula; the upper computer software is deployed in the touch screen, and functions of data entry, parameter setting, type selection of preparation or performance test, preparation or performance test step compilation, test result display and the like can be realized through the touch screen.

The second technical scheme of the invention provides a sample preparation method of a large-size cementing component, which is implemented by adopting the sample preparation and performance test device and comprises the following steps:

(1) the method comprises the following steps of firstly, respectively placing an upper layer part and a lower layer part on a working surface of a lower fixed working table, lowering the movable working table to a set height position, measuring the actual thickness of the upper layer part and the lower layer part by using detection displacement sensor sets respectively arranged at measuring point positions on the fixed working table and the movable working table, if the thickness difference fed back by each measuring point is detected to be more than 15%, determining that the thickness of the upper layer part or the lower layer part to be measured is not uniform, and replacing the upper layer part or the lower layer part, if the thickness difference fed back by each measuring point is detected to be less than or equal to 15%, determining that the thickness uniformity of the upper layer part or the lower layer part to be measured is qualified;

(2) gluing the lower layer part with qualified thickness uniformity in a gluing range, then placing the lower layer part subjected to gluing on a working surface on a lower fixed workbench, placing the upper layer part on a corresponding position, and performing a pressing step;

(3) and in the pressing process, the heating assembly is heated to a set temperature, the workbench is moved to contact with the lower layer part to press the upper layer part, the pressing force is maintained at a set value, after the pressing is finished, the workbench returns to the initial position, and the glued component pressed by the upper layer part and the lower layer part is taken out, so that the process is finished.

The third technical scheme of the invention provides a performance test method of a large-size glued joint member, which is implemented by adopting the preparation and performance test device and comprises the following steps:

firstly, processing the prepared large-size cementing component into a sample to be tested;

secondly, placing the sample to be tested on a lower fixing workbench, enabling a vacuum adsorption component on the lower fixing workbench to extend out of the working surface of the sample to be tested, and enabling the sample to be tested to move downwards in an adsorption range after adsorbing and fixing the lower surface of the sample to be tested so that the sample to be tested is tightly attached to the working surface of the lower fixing workbench;

thirdly, starting the movable workbench to descend above the sample to be tested, enabling the vacuum adsorption assembly on the movable workbench to extend out of the working surface of the movable workbench, adsorbing and fixing the upper surface of the sample to be tested, moving upwards in an adsorption range, and meanwhile, continuing to descend until the movable workbench is attached to the sample to be tested;

and (IV) moving the movable workbench upwards at a set tensile test speed until the tested sample is broken or the tested sample reaches a set force value or tensile displacement value, and recording the obtained tension value data and displacement data in the test process to finish the test.

Compared with the prior art, the invention has the following advantages:

(1) the invention discloses a device for sample preparation and performance test of a large-size gluing component suitable for various glued materials and various adhesives, and provides a method for accurately controlling the glue layer thickness of a gluing interface of a sample of the large-size gluing component under the conditions of different gluing temperatures and different pressing forces, and a method for testing the overall forward-pulling performance of the sample of the large-size gluing component.

(2) The invention adopts a plurality of groups of detection displacement sensor groups to detect the actual thickness of the glued parts, and combines the mechanisms of linear lifting driving component driving, lifting guiding, synchronous lifting and the like to effectively control the position of a large-size moving working surface, thereby realizing the accurate preparation method of the glue layer thickness between two glued parts; the adoption adsorbs lift actuating mechanism's multiunit vacuum adsorption subassembly, combines the selectivity of absorption scope to open, satisfies the whole positive tension mechanics capability test of multiple large-size cementing sample.

(3) The invention can obtain various combined glue joint preparation process parameters, process conditions and performance evaluation numbers by accurately correcting and adjusting the temperature of the force sensor, the height displacement sensor, the glued joint sample and the adhesive adopted in the glue joint sample preparation and test processes.

(4) The method is simple and effective, the preparation and mechanical property test precision of the sample is high, the adaptability and accuracy of the large-size adhesive joint component can be effectively realized, and the method can be widely applied to the preparation and performance test research of the samples of various adhesives, non-metal materials (or composite materials) -non-metal materials (or composite materials), non-metal materials (or composite materials) -metal and metal-metal plates in large-area adhesive joint connection, and the process parameter verification and optimization of the large-size component before actual production.

Drawings

FIG. 1 is a schematic structural diagram of a sample preparation and performance testing apparatus according to the present invention;

FIG. 2 is a schematic view of the connection location of the lift drive assembly to the force sensor and upper moving table;

FIG. 3 is a schematic view of a lower stationary platen;

FIG. 4 is a schematic cross-sectional view at the working face;

FIG. 5 is a schematic view of a work surface portion;

FIG. 6 is a schematic view of a vacuum adsorption assembly;

FIG. 7 is a schematic view of the upper portion of the mobile station;

FIG. 8 is a schematic view of a lower perspective of the mobile work table;

FIG. 9 is a schematic view of a synchronous lift assembly;

FIG. 10 is a schematic view of the connection of the synchronizing shaft;

FIG. 11 is a schematic illustration of a press-fit process for sample preparation;

FIG. 12 is a schematic view showing measurement of the actual thickness of a test specimen;

the notation in the figure is:

1-a frame body;

2-upper fixing means;

3-fixing a working table at the lower part;

4-moving the working table;

5-lifting driving piece;

6-a heating assembly;

7-a vacuum adsorption component, 701-a vacuum chuck, 702-an adsorption lifting unit;

8-synchronous lifting component, 801-helical rack, 802-synchronous driving shaft, 803-synchronous driven shaft, 804-first helical gear, 805-second helical gear and 806-rotary encoder;

9-lifting guide assembly, 901-guide column, 902-guide sleeve;

10-a height displacement sensor;

11-a force sensor;

12-a detection displacement sensor;

13-origin calibration sensor;

14-upper component;

15-lower level part.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

In the following embodiments or examples, functional components or structures that are not specifically described are all conventional components or structures in the art for achieving the corresponding functions.

The invention provides a sample preparation and performance test device for a large-size glued joint member, the structure of which is shown in figures 1-10, and the device comprises:

a frame body 1;

an upper fixing mechanism 2 arranged at the upper part of the frame body 1;

a lower fixing workbench 3 fixedly arranged at the lower part of the frame body 1;

a movable table 4 located directly above the lower fixed table 3: which is connected with the moving part of a lifting driving piece 5 arranged on the upper fixing mechanism 2 and is driven by the lifting driving piece 5 to vertically lift above the lower fixing workbench 3;

the heating component 6: which are respectively arranged on the lower fixed workbench 3 and the movable workbench 4 and are used for heating the part to be glued;

vacuum adsorption component 7: which are respectively arranged on the lower fixed table and the movable worktable 4 and are used for adsorbing and fixing the cementing component to be tested during the performance test.

In a specific embodiment of the present invention, please refer to fig. 7 to 10, the apparatus further includes a synchronous lifting assembly 8, which includes a helical rack 801 vertically disposed on the rack body 1, and four synchronous shafts horizontally disposed on the movable table 4, wherein the synchronous shafts are composed of a pair of parallel synchronous driving shafts 802 and a pair of parallel synchronous driven shafts 803 which are disposed opposite to each other in pairs, the synchronous driving shafts 802 and the synchronous driven shafts 803 are engaged with each other by a first helical gear 804 to realize synchronous and same-angle rotation of the four synchronous shafts, and the two synchronous driving shafts 802 are further provided with a second helical gear 805 engaged with the helical rack 801. The synchronous lifting component 8 can control the synchronous lifting of each plane position in the lifting process of the movable workbench 4, ensure that the working surface of the movable workbench 4 is parallel to the working surface of the fixed workbench at any position, and inhibit the flatness deviation and torsion between the working surfaces of the two workbenches caused by uneven stress in the up-and-down movement of the large-size workbench; the thickness consistency of the glue layer on the whole large-size gluing contact surface in the pressing preparation process of the sample of the large-size gluing member is ensured, the stress direction of the sample of the large-size gluing member in the whole forward pulling test process is always perpendicular to the interface of the cross-over joint, the error caused by the tearing condition generated on the interface of the cross-over joint due to the deflection of the stress direction is reduced, and the reliability of test data is ensured. The synchronous lifting component 8 is a passive driving structure and is connected with the movable workbench 4, and when the lifting driving component drives the movable workbench 4 to move, the synchronous lifting component and the movable workbench 4 are lifted together.

Furthermore, a rotary encoder 806 (two in total, namely two synchronous driving shaft end angle positions of the synchronous lifting assembly 8) is further provided at the end of the synchronous driving shaft 802 for monitoring the synchronous operation state of the synchronous lifting assembly 8, so as to ensure the parallelism of the movable table 4 and the working surface of the fixed table during the moving or stressing process.

In an embodiment of the present invention, please refer to fig. 1 and so on, the apparatus further includes a lifting guide assembly 9, which includes a guide column 901 vertically disposed on the frame body 1, and a guide sleeve 902 fixed on the moving platform and slidably engaged with the guide column 901. Which can cooperate with the synchronous lifting component 8 to control the synchronous lifting effect of the lifting process of the movable working platform 4.

In an embodiment of the present invention, please refer to fig. 1 and so on, the movable table 4 is further provided with a height displacement sensor 10 for monitoring an actual displacement position of the movable table 4. The height displacement sensor 10 can be a linear displacement sensor such as a grating ruler and a pull rope sensor, and is used for monitoring and adjusting the actual displacement position of the movable workbench 4, further controlling the thickness of a glue layer of the glue joint interface, and the height displacement sensor 10 is also used for recording displacement data of the positive pull performance test process in real time.

In an embodiment of the present invention, referring to fig. 2, etc., a force sensor 11 is further disposed between the movable table 4 and the lifting driving member 5. The force sensor 11 has two modes of tension and compression. The method is used for obtaining mechanical parameters of sample preparation and performance test of the large-size glued joint member, such as the relation between the pressing force and the glue layer thickness under the specific temperature condition in the preparation process, the relation between the glue layer thickness and the tension and the displacement in the positive tension mechanical performance test process at the specific temperature, the maximum positive tension breaking force in the glue layer thickness and the positive tension mechanical performance test process at the specific temperature and the like.

In a specific embodiment of the present invention, please refer to fig. 3 and so on, the apparatus further includes several sets of detecting displacement sensors 12 respectively disposed at corresponding measuring point positions on the lower fixed workbench 3 and the movable workbench 4 in pairs, that is, each set of detecting displacement sensors 12 is disposed at corresponding measuring point positions on the lower fixed workbench 3 and the movable workbench 4. In the process of preparing the sample, the detection displacement sensor 12 is used for measuring the actual thickness of the part to be glued, and the accurate displacement of the movable worktable 4 is determined and controlled through calculation, so that the control accuracy of the glue layer thickness of the gluing interface is ensured; the detection displacement sensor 12 is also used for monitoring the joint state of the sample and the working surfaces of the lower fixed workbench 3 and the movable workbench 4 in the performance test process; the detection sensor is a contact position sensor, so that the influence of air holes, burrs, micro pits and the like on the precision of large-size glued parts is avoided. In addition, 4 contact type displacement sensors are arranged on the diagonal line of the lower fixed worktable 3 as an origin calibration sensor 13 for calibrating and calibrating the origin position of the movable worktable 4. The contact type displacement sensor comprises a body and a measuring head, wherein the measuring head can be elastically compressed into the body within a measuring range in the measuring direction, and the resilience force of the contact type displacement sensor during elastic compression is optimally not less than 1 Newton, so that the influence of burrs on the surface of a workpiece on the detection precision can be avoided.

In a specific embodiment of the present invention, referring to fig. 4 and 5, the heating assembly 6 includes a temperature-controllable heating plate disposed inside the working surface of the lower fixed platen 3 or the movable platen 4, and the working surfaces of the lower fixed platen 3 and the movable platen 4 are made of a heat-conductive material. The heating plate is arranged on the inner sides of working faces on the lower fixed workbench 3 and the movable workbench 4 and is not in direct contact with a glued part to be tested, the working faces on the lower fixed workbench 3 and the movable workbench 4 are in contact with and attached to an upper glued part and a lower glued part in the using process, the working faces on the workbenches are heated by the heating component 6, the working faces on the workbenches are made of materials with good heat conduction and certain wear resistance, such as copper materials, so that the whole working face on the workbench is uniformly heated, the two glued parts are uniformly heated by the working faces on the workbenches, and the phenomenon of nonuniform heating caused by the fact that the glued parts are directly heated by the heating component 6 is avoided; the temperature is set to adjust and detect the temperature of the upper and lower parts to be glued; in the process of preparing the sample, the temperature of the adhesive in the process of preparing and pressing is indirectly adjusted and detected, and in the process of testing the performance, the temperature of the adhesive layer of the glued component is indirectly adjusted by setting the temperature, so that the method is used for testing the gluing mechanical performance of the adhesive layer and/or the two glued components at different temperatures.

In a specific embodiment of the present invention, when preparing a sample of a large-sized adhesive member, the movable worktable 4 is driven by the linear lifting driving assembly to move downward, so as to control the pressing position and pressing pressure of the large-sized adhesive member simulating sample preparation, thereby obtaining different adhesive layer thicknesses. When the positive tension mechanical performance of the sample of the large-size gluing component is tested, the movable workbench 4 is driven by the linear lifting driving assembly to move upwards, so that the positive tension displacement and the positive tension of the simulated sample of the large-size gluing component are controlled, and the positive tension mechanical performance parameters of the simulated sample gluing joint of the large-size gluing component are obtained.

In a specific embodiment of the present invention, referring to fig. 4 and fig. 6 again, the vacuum suction assembly 7 includes a suction lifting unit 702 disposed on the movable table 4 or the lower fixed table 3, and vacuum chucks 701 disposed on the suction lifting unit 702, wherein each vacuum chuck 701 is connected to an external vacuum generating device through a vacuum pipeline; when the performance of the adhesive member is tested, the vacuum chuck 701 is driven by the adsorption lifting unit 702 to extend to a position beyond the working surface of the lower fixed workbench 3 or the movable workbench 4; in other states, the vacuum chuck 701 is driven by the suction lifting unit 702 to return to a position lower than the working surface of the lower fixed table 3 or the movable table 4. The vacuum suction assemblies 7 are preferably arranged in an array on the moving table 4 and the lower stationary table 3, and each vacuum chuck 701 is provided with a negative pressure by a vacuum line and an external vacuum generating device, which are preferably individually controlled by a control system, so as to be adapted to samples to be tested of different sizes.

When the overall performance test of a sample of a large-size adhesive member is performed, the suction cup on the vacuum adsorption component 7 on the lower fixed workbench 3 adsorbs the lower part 15 of the sample to be tested, the suction cup on the vacuum adsorption component 7 on the movable workbench 4 adsorbs the upper part 14 of the sample to be tested, the linear lifting driving component drives the movable workbench 4 to move upwards according to the set test speed, the forward-pulling performance test of the adhesive joint (such as the various performance mechanical performance tests in claim 2) is performed, and the adhesive performance under various parameters is tested.

The vacuum adsorption components 7 on the fixed workbench and the movable workbench 4 are provided with lifting units, when sample preparation of large-size cementing components is carried out, the lifting units on the vacuum adsorption components 7 drive the vacuum sucker 701 to return to a working surface lower than the lower fixed workbench 3 or the movable workbench 4, and space interference of the samples in press-fitting preparation is avoided; when the overall positive tension mechanical performance test of the sample of the large-size glued component is carried out, the lifting unit on the vacuum adsorption component 7 drives the vacuum sucker 701 to extend out to a position higher than the working surface of the lower fixed workbench 3 or the movable workbench 4, after the vacuum sucker 701 of the vacuum adsorption component 7 adsorbs the upper layer part 14 and the lower layer part 15 of the sample to be tested, the lifting unit on the vacuum adsorption component 7 drives the vacuum sucker 701 to return, so that the adsorption surfaces of the upper part and the lower part of the sample to be tested are tightly attached to the working surfaces of the workbenches, and the tensile force-displacement relation curve is used for carrying out the overall positive tension mechanical performance test process of the sample.

The vacuum adsorption force in the test process and the return holding force of the lifting unit on the vacuum adsorption assembly 7 are 1.3-2 times of the maximum breaking force in the whole forward pulling process of the sample, and the actual mechanical property value of the sample to be tested is independently adjusted.

In a specific embodiment of the present invention, the apparatus of the present invention may further include a control system, which may be composed of a PLC controller and upper computer software, wherein the PLC controller controls each motion axis, pneumatic component, sensor data acquisition and data calculation of the apparatus; the upper computer software realizes communication with the PLC, establishment of a measuring point measuring sequence, data entry, parameter setting and selection of a measuring formula; the upper computer software is deployed in the touch screen, and functions of data entry, parameter setting, type selection of preparation or performance test, preparation or performance test step compilation, test result display and the like can be realized through the touch screen.

Based on the device in the above embodiment, the present invention further provides a sample preparation method for a large-sized adhesive member, as shown in fig. 11, including the following steps:

(1) firstly, respectively placing an upper layer part 14 and a lower layer part 15 on the working surface of a lower fixed working table 3, lowering a movable working table 4 to a set height position, then measuring the actual thickness of the upper layer part 14 and the lower layer part 15 by a detection displacement sensor 12 group respectively arranged at each measuring point position on the fixed working table and the movable working table 4, if the thickness difference deviation fed back by each measuring point is detected to be more than 15%, determining that the thickness of the upper layer part 14 or the lower layer part 15 to be measured is not uniform, and replacing the upper layer part 14 or the lower layer part 15 to be measured, if the thickness difference deviation fed back by each measuring point is detected to be less than or equal to 15%, determining that the thickness uniformity of the upper layer part 14 or the lower layer part 15 to be measured;

(2) gluing the lower layer component 15 with qualified thickness uniformity within a gluing range, then placing the lower layer component 15 which is glued on a working surface on the lower fixed workbench 3, placing the upper layer component 14 on a corresponding position, and performing a pressing step;

(3) and in the pressing process, the heating assembly 6 is heated to a set temperature, the workbench 4 is moved to contact with the lower layer part 14 to press the upper layer part, the pressing force is maintained at a set value, after the pressing is finished, the workbench 4 is moved back to the initial position, and the adhesive bonding member pressed by the upper layer part 14 and the lower layer part 15 is taken out, so that the process is finished.

Based on the apparatus in the above embodiment, the present invention further provides a performance testing method for a large-sized adhesive member, please refer to fig. 12, which includes the following steps:

secondly, a sample to be tested is placed on the lower fixing workbench 3, the vacuum adsorption component 7 on the lower fixing workbench 3 extends out of the working surface of the sample to be tested, and the sample to be tested moves downwards in an adsorption range after the lower surface of the sample to be tested is adsorbed and fixed, so that the sample to be tested is tightly attached to the working surface of the lower fixing workbench 3;

thirdly, starting the movable workbench 4 to descend above the sample to be tested, enabling the vacuum adsorption component 7 on the movable workbench 4 to extend out of the working surface of the movable workbench, adsorbing and fixing the upper surface of the sample to be tested, moving upwards in an adsorption range, and meanwhile, continuing to descend to be attached to the sample to be tested;

and (IV) moving the movable worktable 4 upwards at a set tensile test speed until the tested sample is broken or the tested sample reaches a set force value or tensile displacement value, and recording the obtained tension value data and displacement data in the test process to finish the test.

The above embodiments may be implemented individually, or in any combination of two or more.

The above embodiments will be described in more detail with reference to specific examples.

Example 1:

the present embodiment provides a sample preparation and performance testing apparatus for a large-sized adhesive member, the structure of which is shown in fig. 1-10, including:

a frame body 1;

an upper fixing mechanism 2 arranged at the upper part of the frame body 1;

The sample preparation and performance test device of the embodiment can simultaneously realize two functions of the sample of the large-size gluing member on one device, wherein one function is the preparation function of the sample of the large-size gluing member, and the accurate control of the glue layer thickness of the gluing interface of the sample of the large-size gluing member under the conditions of different gluing temperatures and different pressing forces is realized in the preparation process of the sample of the large-size gluing member; the second is the function of testing the performance of the adhesive joint of the sample of the large-size adhesive member, so that the forward pulling performance test of the two adhered parts of the sample of the large-size adhesive member which is adhered at different adhesive layer temperatures and/or different temperatures is realized.

Referring to fig. 7 to 10 again, the apparatus further includes a synchronous lifting assembly 8, which includes a helical rack 801 vertically disposed on the frame body 1, and four synchronous shafts horizontally disposed on the movable table 4, wherein the synchronous shafts include a pair of parallel synchronous driving shafts 802 and a pair of parallel synchronous driven shafts 803, the synchronous driving shafts 802 and the synchronous driven shafts 803 are disposed opposite to each other, and are engaged with each other by a first helical gear 804 to realize synchronous and same-angle rotation of the four synchronous shafts, and the two synchronous driving shafts 802 are further provided with a second helical gear 805 engaged with the helical rack 801. The synchronous lifting component 8 can control the synchronous lifting of each plane position in the lifting process of the movable workbench 4, ensure that the working surface of the movable workbench 4 is parallel to the working surface of the fixed workbench at any position, and inhibit the flatness deviation and torsion between the working surfaces of the two workbenches caused by uneven stress in the up-and-down movement of the large-size workbench; the thickness consistency of the glue layer on the whole large-size gluing contact surface in the pressing preparation process of the sample of the large-size gluing member is ensured, the stress direction of the sample of the large-size gluing member in the whole forward pulling test process is always perpendicular to the interface of the cross-over joint, the error caused by the tearing condition generated on the interface of the cross-over joint due to the deflection of the stress direction is reduced, and the reliability of test data is ensured. The synchronous lifting component 8 is a passive driving structure and is connected with the movable workbench 4, and when the lifting driving component drives the movable workbench 4 to move, the synchronous lifting component and the movable workbench 4 are lifted together.

The end of the synchronous drive shaft 802 is further provided with a rotary encoder 806 (two in total, namely at two synchronous drive shaft end angle positions of the synchronous lifting assembly 8 respectively) for monitoring the synchronous operation state of the synchronous lifting assembly 8, thereby ensuring the parallelism of the movable table 4 and the working surface of the fixed table in the moving or stressing process.

Referring to fig. 1, the device further includes a lifting guide assembly 9, which includes a guide column 901 vertically disposed on the frame body 1, and a guide sleeve 902 fixed on the moving platform and slidably engaged with the guide column 901. Which can cooperate with the synchronous lifting component 8 to control the synchronous lifting effect of the lifting process of the movable working platform 4.

Referring to fig. 1, the moving table 4 is further provided with a height displacement sensor 10 for monitoring an actual displacement position of the moving table 4. The height displacement sensor 10 can be a linear displacement sensor such as a grating ruler and a pull rope sensor, and is used for monitoring and adjusting the actual displacement position of the movable workbench 4, further controlling the thickness of a glue layer of the glue joint interface, and the height displacement sensor 10 is also used for recording displacement data of the positive pull performance test process in real time.

Referring to fig. 2, a force sensor 11 is further disposed between the movable table 4 and the lifting driving member 5. The force sensor 11 has two modes of tension and compression. The method is used for obtaining mechanical parameters of sample preparation and performance test of the large-size glued joint member, such as the relation between the pressing force and the glue layer thickness under the specific temperature condition in the preparation process, the relation between the glue layer thickness and the tension and the displacement in the positive tension mechanical performance test process at the specific temperature, the maximum positive tension breaking force in the glue layer thickness and the positive tension mechanical performance test process at the specific temperature and the like.

Referring to fig. 3, etc., the device further includes a plurality of sets of detecting displacement sensors 12 respectively disposed at corresponding measuring point positions on the lower fixed workbench 3 and the movable workbench 4 in pairs, that is, each set of detecting displacement sensors 12 is disposed at corresponding measuring point positions on the lower fixed workbench 3 and the movable workbench 4. In the process of preparing the sample, the detection displacement sensor 12 is used for measuring the actual thickness of the part to be glued, and the accurate displacement of the movable worktable 4 is determined and controlled through calculation, so that the control accuracy of the glue layer thickness of the gluing interface is ensured; the detection displacement sensor 12 is also used for monitoring the joint state of the sample and the working surfaces of the lower fixed workbench 3 and the movable workbench 4 in the performance test process; the detection sensor is a contact position sensor, so that the influence of air holes, burrs, micro pits and the like on the precision of large-size glued parts is avoided. In addition, 4 contact type displacement sensors are arranged on the diagonal line of the lower fixed workbench 3 and used for calibrating and calibrating the origin position of the movable workbench 4. The contact type displacement sensor comprises a body and a measuring head, wherein the measuring head can be elastically compressed into the body within a measuring range in the measuring direction, and the resilience force of the contact type displacement sensor during elastic compression is optimally not less than 1 Newton, so that the influence of burrs on the surface of a workpiece on the detection precision can be avoided.

Referring to fig. 4 and 5, the heating assembly 6 includes a temperature-controllable heating plate disposed inside the working surface of the lower stationary platen 3 or the movable platen 4, and the working surface of the lower stationary platen 3 and the movable platen 4 are made of a heat-conductive material. The heating plate is arranged on the inner sides of working faces on the lower fixed workbench 3 and the movable workbench 4 and is not in direct contact with a glued part to be tested, the working faces on the lower fixed workbench 3 and the movable workbench 4 are in contact with and attached to an upper glued part and a lower glued part in the using process, the working faces on the workbenches are heated by the heating component 6, the working faces on the workbenches are made of materials with good heat conduction and certain wear resistance, such as copper materials, so that the whole working face on the workbench is uniformly heated, the two glued parts are uniformly heated by the working faces on the workbenches, and the phenomenon of nonuniform heating caused by the fact that the glued parts are directly heated by the heating component 6 is avoided; the temperature is set to adjust and detect the temperature of the upper and lower parts to be glued; in the process of preparing the sample, the temperature of the adhesive in the process of preparing and pressing is indirectly adjusted and detected, and in the process of testing the performance, the temperature of the adhesive layer of the glued component is indirectly adjusted by setting the temperature, so that the method is used for testing the gluing mechanical performance of the adhesive layer and/or the two glued components at different temperatures.

When a sample of the large-size gluing component is prepared, the movable workbench 4 is driven by the linear lifting driving assembly to move downwards, so that the control of the pressing position and the pressing pressure of the large-size gluing component for simulating sample preparation is realized, and different glue layer thicknesses are obtained. When the positive tension mechanical performance of the sample of the large-size gluing component is tested, the movable workbench 4 is driven by the linear lifting driving assembly to move upwards, so that the positive tension displacement and the positive tension of the simulated sample of the large-size gluing component are controlled, and the positive tension mechanical performance parameters of the simulated sample gluing joint of the large-size gluing component are obtained.

Referring to fig. 4 and 6 again, the vacuum suction assembly 7 includes a suction lifting unit 702 disposed on the movable table 4 or the lower fixed table 3, and vacuum chucks 701 disposed on the suction lifting unit 702, wherein each vacuum chuck 701 is connected to an external vacuum generating device through a vacuum pipeline; when the performance of the adhesive member is tested, the vacuum chuck 701 is driven by the adsorption lifting unit 702 to extend to a position beyond the working surface of the lower fixed workbench 3 or the movable workbench 4; in other states, the vacuum chuck 701 is driven by the suction lifting unit 702 to return to a position lower than the working surface of the lower fixed table 3 or the movable table 4. The vacuum suction assemblies 7 are preferably arranged in an array on the moving table 4 and the lower stationary table 3, and each vacuum chuck 701 is provided with a negative pressure by a vacuum line and an external vacuum generating device, which are preferably individually controlled by a control system, so as to be adapted to samples to be tested of different sizes.

Example 2:

based on the apparatus of embodiment 1, the present embodiment further provides a method for preparing a sample of a large-sized adhesive member, comprising the following steps:

(1) determining the pressing travel position range D of the moving table 4 during the preparation and pressing of the glued parts_P: taking the working surface of the lower fixed worktable 3 as a working reference surface, as shown in fig. 11, respectively determining the thickness of the two parts to be glued and the thickness of the glue layer required by sample preparation; the nominal thickness of the component is H, the nominal thickness of the upper layer component 14 is H1, and the nominal thickness of the lower layer component 15 is HDegree H2, the preset thickness of the glue layer after pressing; then D is_PS + H1+ H2 +; and S is the height position of the reserved pressing stroke, and is determined according to the conditions of gluing height, part deformation and the like, wherein the S is 10-20 mm generally.

(2) Calibrating the displacement precision of the movable workbench 4: the working surface of the lower fixed worktable 3 is used as a working reference surface, and the position is calibrated as the displacement origin D of the movable worktable 4₀When the measured value of the contact type displacement sensor calibrated at the position of the original point of the movable workbench 4 is 0, the movable workbench 4 is attached to the lower fixed workbench 3, and the height displacement sensor 10 is set to be 0 through the control system, so that the calibration of the original point of the displacement is completed; the movable working table 4 is in the pressing stroke position range D_PIs monitored and adjusted in real time by the height displacement sensor 10.

(3) Calibrating the pressing force: according to the performance of the adhesive and the pressing force data obtained by the small sample, the pressing force range required by preparation is estimated, and a high-precision standard dynamometer matched with the pressing force range is adopted to prepare the pressing stroke position range D_PCalibrating the pressing force of the pressing device; the movable worktable 4 slowly descends to prepare a pressing travel position range D_PAnd respectively taking four groups of pressure data of 100%, 75%, 50% and 25% in the range of the standard dynamometer, comparing the reading of the force sensor 11 on the movable worktable 4 with the measured value (standard value) of the high-precision standard force measurement, recording the deviation value into a control system, and fitting and calculating the pressing force by adopting a linear proportion method for outputting the pressing force data of the subsequent preparation result.

And after the calibration of the pressing force is finished, withdrawing the high-precision standard dynamometer and entering the subsequent step.

(4) Measurement of actual thickness of the part to be glued: respectively placing an upper layer component 14 and a lower layer component 15 on a working surface of a lower fixed workbench 3, moving the movable workbench 4 to a corresponding H position according to a corresponding nominal thickness, arranging detection displacement sensors 12 on the lower fixed workbench 3 and the movable workbench 4, detecting the actual thickness of the components, comparing the difference value of each pair of detection sensor values, and calculating the difference value to obtain the actual measurement thickness H of the measured component (the actual measurement thickness H1 of the upper layer component 14 and the actual measurement thickness H2 of the lower layer component 15), as shown in FIG. 12; if the difference deviation of each measuring point is more than 15%, the thickness of the measured part is considered to be uneven, the consistency of the thickness of the glue layer of the obtained sample is difficult to ensure, and the measured part is not suitable for preparing the sample of a large-size gluing component and needs to be replaced.

(5) Gluing and pre-assembling: according to parameters such as gluing amount, gluing track and the like set in the test, gluing is carried out in the whole gluing range of the lower part 15, and automatic gluing is generally adopted for large-size gluing components, so that corresponding gluing parameters are convenient to control.

The lower layer member 15 after the completion of the glue application is placed on the working surface of the lower fixed table 3, and the upper layer member 14 is placed on the corresponding position, and the press-fitting preparation step is performed.

The rubberized lower section 15 has length and width dimensions greater than those of the non-rubberized upper section 14 (single-sided dimension no less than 5mm) for receiving adhesive extruded during the press-fit preparation.

Optionally, the upper layer component 14 and the lower layer component 15 may be placed on the lower fixed workbench 3 in pairs according to the relative position, the movable workbench 4 descends to a position (about 2mm) above the upper surface of the upper layer component 14, the vacuum adsorption components 7 on the lower fixed workbench 3 and the movable workbench 4 extend out of the vacuum devices to be started, the upper layer component 14 and the lower layer component 15 are respectively adsorbed and attached to the working surface of the workbench, the upper layer component 14 and the lower layer component 15 are respectively heated by setting the temperature and the heating time, then the heated lower layer component 15 is taken down to be subjected to glue coating, then the lower layer component 15 subjected to glue coating is placed at the corresponding position, and the pressing preparation step is performed; in the process of gluing the lower layer part 15 after heating, the temperature of the adhesive should be correspondingly controlled, the gluing of the lower layer part 15 and the preassembling of the lower layer part 15 and the upper layer part 14 should be completed in a short time, and the performance of the prepared sample is prevented from being influenced by the overlarge temperature variation difference of the adhesive or the lower layer part 15.

(6) And (3) pressing and preparing a sample: when the movable workbench 4 is at a position above the pressing stroke position range D, the descending speed is high-speed descending, and when the movable workbench reaches the pressing stroke position range D, the descending speed is slow descending; according to the setting of the pressing preparation, when the sample preparation of the corresponding relation between the pressing force and the adhesive layer thickness is carried out, the control system adopts a torque control mode, when the movable workbench 4 descends to reach the set pressing force value, the movable workbench 4 stops moving and starts to keep at the set pressing force value, and at the moment, the force sensor 11 of the movable workbench 4 monitors and adjusts the pressing force value to be at the set value in real time; when the sample preparation of accurate control of the glue layer thickness is carried out, the control system adopts a displacement control mode, the movable workbench 4 stops moving after slowly descending to the position (h1+ h2+) of the actually measured part thickness, the position is kept, and at the moment, the height displacement sensor 10 monitors and adjusts the position of the movable workbench 4 at a set value in real time.

The holding time of the press preparation (press force holding or press position holding) is determined by the kind of the adhesive and the temperature of the adhesive; in the maintaining stage of the pressing preparation, the heating assemblies 6 on the lower fixed workbench 3 and the movable workbench 4 respectively heat the lower part 15 and the upper part 14 and indirectly heat the adhesive for testing the relationship between the curing temperature of the adhesive and the preparation time of the sample and/or the pressing force and other parameters.

After the pressing preparation reaches the set value, the movable workbench 4 returns to the initial position of the high point; and taking out a sample of the prepared large-size cementing component.

Optionally, after the pressing, the large-size gluing component connected by some adhesives needs to be subjected to aging curing under a non-pressure condition, and the like, so that the preparation of the large-size gluing component can be completed.

Example 3:

based on the device in embodiment 1, the present embodiment further provides a method for testing the performance of a sample of a large-sized adhesive member, which includes the following steps:

(1) the performance of the test specimen is: processing the prepared sample of the large-size adhesive joint member into a sample for performance test on machining equipment; for a performance test sample subjected to the overall positive tensile mechanical performance test, the allowance not less than 3mm is machined and removed in a single-side mode according to the original length size and width size of the upper layer part 14, and the allowance is used for preparing residual overflowing adhesive on the periphery of the sample and preparing defects at the periphery; removing adhesive residues on the upper surface and the lower surface of the prepared thickness sample; the thickness of the glue layer at each position of the sample of the large-size gluing member is measured.

Optionally, the sample of the large-size adhesive member may be obtained by cutting and sampling the prepared sample of the large-size adhesive member according to different regions, measuring the thickness of the adhesive layer in each region, and then performing a forward tensile property test on each cut small-size sample.

(2) Determining the travel position range D of the moving table 4 during the testing of the positive tensile properties_S: measuring the thickness T of the sample to be tested, and setting the stretching lengths L and D of the positive tension mechanical property test_ST + L, for the glued joint component, take L10 ~ 100 mm.

(3) 4 displacement accuracy calibration and tensile force calibration of the movable workbench: refer to example 2.

(4) The tested sample for performance test is fixed on the lower fixing workbench 3 by positioning and adsorption: after the length and width of the sample to be tested are determined, setting the adsorption range of the vacuum chuck 701 of the vacuum adsorption component 7 on the lower fixed workbench 3 corresponding to the length and width of the sample to be tested, wherein the adsorption range of the vacuum chuck 701 is larger than the length and width of the sample to be tested; the adsorption lifting unit 702 of the vacuum adsorption component 7 on the lower fixed workbench 3 drives the vacuum chuck 701 in the adsorption range to move upwards, and the vacuum chuck 701 is higher than the working surface on the lower fixed workbench 3; placing a tested sample on a vacuum chuck 701 on a lower fixed workbench 3, and starting negative pressure by the vacuum chuck 701 in an adsorption range to generate vacuum adsorption on the lower surface of the tested sample; the vacuum chuck 701 in the adsorption range is driven by the adsorption lifting unit 702 of the vacuum adsorption assembly 7 to move downwards, so that the lower surface of the sample to be tested is tightly attached to the working surface on the lower fixed workbench 3; the detection-use movable sensor group on the lower fixed table 3 monitors the bonding state of the sample to be detected and the lower fixed table 3.

(5) The positioning and adsorption of the tested sample for performance test on the movable worktable 4 are fixed: the movable workbench 4 descends to a position 2-5 mm above the thickness T of the sample to be tested, and stops, the adsorption lifting unit 702 of the vacuum adsorption assembly 7 on the movable workbench 4 drives the vacuum chuck 701 in the adsorption range to move downwards, and the vacuum chuck 701 is higher than the working surface on the lower fixed workbench 3; the vacuum chuck 701 in the adsorption range starts negative pressure, the detection displacement sensor on the movable workbench 4 measures the distance between the working surface of the movable workbench 4 and the upper surface of the sample to be tested, the movable workbench 4 slowly descends according to the measurement data of the detection displacement sensor 12 until the measurement value of the detection displacement sensor 12 group is 0, and the movable workbench 4 stops moving; the adsorption lifting unit 702 of the vacuum adsorption component 7 on the movable workbench 4 drives the vacuum chuck 701 in the adsorption range to move upwards, so that the upper surface of the sample to be tested is ensured to be tightly attached to the working surface on the movable workbench 4;

(6) performance test of the tested sample: after the step (5) is finished, the movable workbench 4 moves upwards at a set positive pulling test speed until the tested sample is broken and broken, or the tested sample reaches a set force value and/or a set tensile displacement value; in the performance test process, the force sensor 11 records tensile force value data in real time, the height displacement sensor 10 is also used for recording displacement data in the positive tensile performance test process in real time, and the force value data and the displacement data are stored in the control system and used for subsequent related test analysis.

The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.

Claims

1. A sample preparation and performance test device for a large-size glued joint member is characterized by comprising:

a frame body;

an upper fixing mechanism arranged at the upper part of the frame body;

a lower fixing workbench fixedly arranged at the lower part of the frame body;

a vacuum adsorption component: the adhesive bonding component is respectively arranged on the lower fixed table and the movable workbench and used for adsorbing and fixing the adhesive bonding component to be tested during performance test;

the device can simultaneously realize two functional modes of the sample of the large-size gluing member during specific work, one is the preparation function of the sample of the large-size gluing member, namely, the accurate control of the glue layer thickness of the gluing interface of the sample of the large-size gluing member under the conditions of different gluing temperatures and/or different pressing forces in the preparation process of the sample of the large-size gluing member, and the other is the function of the performance test of the gluing joint of the sample of the large-size gluing member, namely, the forward pulling performance test of two glued parts of the sample of the glued large-size gluing member under different gluing glue layer temperatures.

2. The apparatus for preparing and testing the sample of the large-size gluing component according to claim 1, further comprising a synchronous lifting assembly, which comprises a helical rack arranged on the frame body along the vertical direction, and four synchronous shafts horizontally arranged on the movable worktable, wherein the synchronous shafts comprise a pair of parallel synchronous driving shafts and a pair of parallel synchronous driven shafts which are arranged in pairs and oppositely, the synchronous driving shafts and the synchronous driven shafts are mutually meshed by adopting first helical gears to realize synchronous and same-angle rotation of the four synchronous shafts, and second helical gears meshed with the helical rack are further arranged on the two synchronous driving shafts.

3. The apparatus for sample preparation and performance test of a large-sized adhesive member according to claim 2, wherein a rotary encoder is further provided on the synchronous driving shaft.

4. The apparatus for sample preparation and performance test of a large-sized glued joint member according to claim 1, further comprising a lifting guide assembly including a guide post vertically disposed on the frame body and a guide sleeve fixed on the movable platform and slidably engaged with the guide post.

5. The apparatus for sample preparation and performance test of a large-sized glued joint member according to claim 1, wherein the movable table is further provided with a height displacement sensor for monitoring the actual displacement position of the movable table;

and a force sensor is also arranged between the movable workbench and the lifting driving piece.

6. The apparatus for sample preparation and performance testing of a large-sized glued joint member according to claim 1, further comprising a plurality of sets of detecting displacement sensors disposed in pairs at corresponding measuring points on the lower fixed stage and the movable stage, respectively.

7. The apparatus for sample preparation and performance test of a large-sized adhesive member according to claim 1, wherein the heating unit comprises a temperature-controllable heating plate disposed inside the working surface of the lower stationary stage or the movable stage, and the working surfaces of the lower stationary stage and the movable stage are made of a heat-conductive material.

8. The apparatus for sample preparation and performance test of a large-sized glued joint member according to claim 1, wherein the vacuum suction assembly comprises a suction elevating unit disposed on the movable table or the lower fixed table, and vacuum chucks disposed on the suction elevating unit, each vacuum chuck being connected to an external vacuum generating device through a vacuum line, respectively; when the performance test of the glued joint component is carried out, the vacuum chuck is driven by the adsorption lifting unit to extend out to a position exceeding the working surface of the lower fixed workbench or the movable workbench; and in other states, the vacuum chuck is driven by the adsorption lifting unit to return to a position lower than the working surface of the lower fixed workbench or the movable workbench.

9. A sample preparation method for a large-sized adhesive member, which is implemented by using the sample preparation and performance testing apparatus according to any one of claims 1 to 8, comprising the steps of:

10. A performance testing method of a large-sized glued joint member, which is implemented by using the preparation and performance testing device according to any one of claims 1 to 8, and is characterized by comprising the following steps: