Device for automatically bonding strain gauges

Abstract

The present invention belongs to the technical field of strain gauge bonding, and is mainly used for preparing samples in the early stage of physical and chemical tests. Specifically, it relates to a device for automatically bonding strain gauges, including a movable base at the bottom, and a sample preparation system is arranged on the top surface of the movable base, characterized in that the sample preparation system has a first linear moving part, a strain gauge box is arranged on one side of the first linear moving part, a second linear moving part parallel to the first linear moving part is connected directly above the first linear moving part, and a sample is arranged on the second linear moving part. The device can realize automatic polishing of samples, and the polishing is more uniform. The samples can be automatically turned over for polishing, ensuring the symmetry of the polishing on both sides, and the quality of the test results is guaranteed; and it avoids excessive manual polishing that causes stress concentration on the samples, affecting the reliability and accuracy of the final test data; the entire sample preparation process is automated, freeing up manpower, improving sample preparation efficiency, and saving time.

Description

Technical Field

[0001] The invention belongs to the technical field of strain gauge bonding, is mainly used for early preparation of samples, and specifically relates to a device for automatically bonding strain gauges. Background Art

[0002] The traditional method of attaching strain gauges is to measure the width and length of the sample with a caliper and then select the midpoint of the sample. Then, use sandpaper to lightly grind the area around the selected midpoint to the size of the strain gauge, and then clean the grinding dust one by one; then turn the sample over and repeat the above steps, measure, select the midpoint, grind, and clean the other side of the sample; then, apply adhesive to the two grinded areas, and then bond the strain gauge to the two glue-coated areas respectively, wait for a certain period of time, and connect it to the strain gauge after it solidifies.

[0003] Through the analysis of this bonding strain gauge method, there are currently several disadvantages:

[0004] 1. Manual operation is affected by human experience and subjectivity, resulting in large errors in finding the points for measuring the specimen, and there is a risk of asymmetric grinding on both sides of the specimen when the points are selected for grinding after turning over (the asymmetry of the strain gauges on both sides has a great impact on the test results);

[0005] 2. When grinding the specimen, the operator's experience is the only factor, and the grinding force cannot be controlled. Excessive grinding will cause stress concentration on the specimen, affecting the reliability and accuracy of the final test data.

[0006] 3. The entire sample preparation process is completed manually by the experimenters, which is extremely cumbersome, time-consuming and inefficient. Summary of the invention

[0007] The purpose of the present invention is to solve the problem that the entire sample preparation process is completed manually by experimenters, the process is extremely cumbersome and time-consuming, and the sample preparation quality cannot be guaranteed.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is:

[0009] A device for automatically bonding strain gauges comprises a movable base at the bottom, a sample preparation system is arranged on the top surface of the movable base, and is characterized in that the sample preparation system has a first linear moving part, a strain gauge box is arranged on one side of the first linear moving part, a second linear moving part parallel to the first linear moving part is connected directly above the first linear moving part, a sample is arranged on the second linear moving part, and a grinding system and a three-axis module are arranged on both sides of the second linear moving part.

[0010] A device for automatically bonding strain gauges of the present application is adopted, and easy movement is achieved by setting a movable base at the bottom. A first linear moving part is arranged in the middle of the sample preparation system, and a second linear moving part parallel to the first linear moving part is connected directly above the first linear moving part, and a sample is arranged on the midline of the width direction of the second linear moving part. The first linear moving part and the second linear moving part above it are both used to drive the sample to reciprocate along the axial direction. The strain gauge box on one side of the first linear moving part is used to centrally store the strain gauges for easy access. A grinding system and a three-axis module are respectively arranged on both sides of the second linear moving part. The grinding system includes a grinding pen and a heat drying gun. The three-axis module includes a glue dispensing pen, an accordion suction cup and a pre-pressing head. The grinding pen is arranged on the midline of the width direction of the sample. The grinding pen is used for automatic grinding of the sample with precise positioning. The glue dispensing pen is used for dispensing glue on the sample. The accordion suction cup is used to absorb the strain gauge in the strain gauge box onto the sample. The pre-pressing head is used to press the strain gauge onto the sample. The heat drying gun is used to heat and cure the glue between the sample and the strain gauge. Therefore, the device can automatically select the midpoint of the sample, automatically grind, automatically dispense glue, automatically absorb strain gauges, automatically bond, automatically pre-press, and automatically cure, thereby avoiding a series of manual sample preparation problems, improving sample preparation efficiency and sample preparation quality, and ensuring the accuracy and reliability of test data.

[0011] Preferably, the three-axis module is an A-axis, a B-axis and a C-axis which are perpendicular to each other. The B-axis is fixed on the support frame of the movable base, the A-axis is fixed on the B-axis, a slider and a servo motor module A are provided on the A-axis, the slider can slide back and forth along the A-axis driven by the servo motor module A, the C-axis is fixed on the slider of the A-axis, the C-axis can reciprocate along the A-axis driven by the servo motor module A, a servo motor module C and an integrated block are provided on the C-axis, the integrated block can slide back and forth along the C-axis driven by the servo motor module C, two opposite sides of the integrated block which are not in contact with the C-axis are respectively provided with an accordion suction cup and a glue dispensing pen, and a pre-pressing head is provided at the bottom of the C-axis.

[0012] Preferably, the first linear moving part includes a platform B, and the second linear moving part is provided with a servo motor 1, the servo motor 1 is fixed to the platform B through a fixed support 1, one end of the main shaft of the servo motor is connected to a coupling 1, and the coupling 1 is connected to a forward and reverse screw 1 away from the main shaft end, and both ends of the forward and reverse screw 1 are respectively connected to a bearing support 1, and the bearing support 1 is fixed to the platform B, and a guide rail 1 is provided on each of the two sides parallel to the forward and reverse screw 1, and the guide rail 1 is fixed to the platform B, and two platforms A are connected to the guide rail 1, and the two platforms A are in the same horizontal plane, and the platform A is connected to the forward and reverse screw 1 through a fastener, and the platform A can slide back and forth along the guide rail 1 when driven by the forward and reverse screw 1, and a rotating air claw is arranged on each of the two platforms A, and the rotating air claw clamps the sample.

[0013] Preferably, the two rotating air claws are arranged opposite to each other.

[0014] Preferably, a servo motor 2 is provided in the first linear moving part, and the servo motor 2 is fixed to the movable base through a fixed support 2. A coupling 2 is connected to the main shaft end of the servo motor 2, and the coupling 2 is connected to a forward and reverse screw 2 away from the main shaft end. A bearing support 2 is connected to each of the two ends of the forward and reverse screw 2, and the bearing support 2 is fixed to the top plate of the movable base. A guide rail 2 is provided on each of the two sides parallel to the forward and reverse screw 2, and the guide rail 2 is fixed to the top plate of the movable base. The guide rail 2 is connected to platform B, and the platform B is connected to the forward and reverse screw 2 through a fastener. Driven by the forward and reverse screw 2, the platform B can slide back and forth along the guide rail 2.

[0015] Preferably, the grinding system is fixed to a fixed bracket on the top plate of the movable base through an adapter plate, and the grinding system is provided with a grinding pen, and the grinding pen is fixed to the guide rail three through a slider with a buckle, and the grinding pen can slide on the guide rail three, and the slider with a buckle is connected to the cylinder through a connecting strip, and the slider with a buckle can reciprocate along the guide rail three when driven by the cylinder, and a heat drying gun is provided at the bottom of the connecting strip.

[0016] Preferably, the strain gauge box is fixed on the top plate of the movable base, and the strain gauge box is a rectangular parallelepiped with at least one cavity inside, which centrally stores strain gauges for easy access.

[0017] Preferably, the movable base is provided with four wheels for easy transportation and movement.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0019] 1. The rotating air claw is used to automatically locate the midpoint of the sample and automatically turn the sample over for grinding, which reduces positioning errors and avoids asymmetric grinding points, uncontrollable grinding force, excessive grinding, and local stress concentration of the sample when manually grinding the two symmetrical sides of the sample. The sample can be ground quickly, accurately, and with high quality, and the symmetry of the strain gauges on both sides of the sample is also improved, ensuring the quality of sample preparation and the reliability and accuracy of the final test data;

[0020] 2. It can accurately grind and automatically turn over, accurately dispense glue, absorb strain gauges, and bond strain gauges. The whole process is highly automated and does not require human participation, thus avoiding errors caused by human operation and improving the efficiency and accuracy of the sample preparation process;

[0021] 3. No need to manually grind the sample, avoiding harm to the operator's body due to accidents, dust and noise during the grinding process;

[0022] 4. The whole machine has a compact structure, occupies a small space, and has four wheels for easy movement and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the automatic bonding strain gauge device of the present invention;

[0024] Figure 2 is a schematic diagram of a second linear moving portion of the present invention;

[0025] Figure 3 is a schematic diagram of a first linear moving portion of the present invention;

[0026] Figure 4 is a schematic diagram of a grinding system of the present invention;

[0027] Figure 5 is a schematic diagram of a three-axis module of the present invention;

[0028] Icons: 1- movable base; 2- sample preparation system; 3- first linear moving part; 301- servo motor 2; 302- fixed support 2; 303- coupling 2; 304- bearing support 2; 305- forward and reverse screw 2; 306- guide rail 2; 307- platform B; 4- second linear moving part; 401- servo motor 1; 402- fixed support 1; 403- coupling 1; 404- bearing support 1; 405- forward and reverse screw 1; 406- guide rail 1; 407- platform A; 408- rotating air claw; 5- three-axis module; 501- B axis; 502- servo motor module A; 503- A axis; 504- servo motor module C; 505- C axis; 506-integrated block; 507-organ suction cup; 508-glue dispensing pen; 509-pre-pressing head; 6-grinding system; 601-grinding pen; 602-guide rail three; 603-slider with snap-on; 604-connecting strip; 605-cylinder; 606-heat drying gun; 7-sample; 8-strain gauge box. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] Example 1

[0032] like Figure 1 As shown, a device for automatically bonding strain gauges comprises a movable base 1 at the bottom, a sample preparation system 2 is arranged on the top plate of the movable base 1, a first linear moving part 3 is arranged in the middle of the sample preparation system 2, a strain gauge box 8 is arranged on one side of the first linear moving part 3, a second linear moving part 4 parallel to the first linear moving part 3 is connected directly above the first linear moving part 3, a sample 7 is arranged on the midline of the second linear moving part 4 in the width direction, and a grinding system 6 and a three-axis module 5 are arranged on both sides of the second linear moving part 4.

[0033] like Figure 5As shown, the three-axis module 5 is provided with an A-axis 503, a B-axis 501 and a C-axis 505 which are perpendicular to each other. The B-axis 501 is fixed on the support frame on the top plate of the movable base 1. The A-axis 503 is fixed on the B-axis 501. The A-axis 503 is provided with a slider and a servo motor module A502. The C-axis 505 is fixed on the slider of the A-axis 503. The position relationship is as follows: the C-axis 505 is perpendicular to the A-axis 503 and perpendicular to the B-axis 501. The servo motor module A502 drives the slider and its C-axis 505 to reciprocate along the A-axis 503. The C-axis 505 is provided with a servo motor module C504 and an integrated block 506. The servo motor module C504 drives the integrated block 506 to slide back and forth along the C-axis 505. An accordion suction cup 507 and a dispensing pen 508 are provided on both sides of the integrated block 506. Figure 2 As shown, the servo motor 401 in the second linear moving part 4 is fixed on the platform B307 through the fixed support 402. One end of the main shaft of the servo motor 401 is connected with a coupling 403, a forward and reverse screw 405, and two bearing supports 404 in sequence. The bearing support 404 is fixed on the platform B307. A guide rail 406 is provided on each of the parallel sides of the forward and reverse screw 405. The guide rail 406 is fixed on the platform B307. Two platforms A407 are connected to the guide rail 406. The platform A407 is connected to the forward and reverse screw 405 through a fastener. The forward and reverse screw 405 can drive the platform A407 to slide back and forth on the guide rail 406. A rotating air claw 408 is arranged on each of the two platforms A407. They are arranged relatively to each other and the sample 7 is clamped on the rotating air claw 408. Figure 3 As shown, the servo motor 2 301 in the first linear moving part 3 is fixed to the movable base 1 through the fixed support 2 302, the main shaft end of the servo motor 2 301 is connected with the coupling 2 303, the coupling 2 303 is connected with the forward and reverse screw 2 305 away from the main shaft end, the two ends of the forward and reverse screw 2 305 are each connected with a bearing support 2 304, the bearing support 2 304 is fixed to the top plate of the movable base 1, and the two sides parallel to the forward and reverse screw 2 305 are each provided with a guide rail 2 306 fixed to the top plate of the movable base 1, the guide rail 2 306 is connected with a platform B307, and the platform B307 is connected to the forward and reverse screw 2 305 through a fastener, so that the platform B307 can slide back and forth along the guide rail 2 306 driven by the forward and reverse screw 2 305. Figure 4As shown, the grinding system 6 is fixed to the fixed bracket on the top plate of the movable base 1 through an adapter plate, and the grinding system 6 is provided with a grinding pen 601, and the grinding pen 601 is fixed to the guide rail 3 602 through a buckle slider 603, so that the grinding pen 601 can slide on the guide rail 3 602, and the buckle slider 603 is connected to the cylinder 605 through a connecting strip 604, so that the buckle slider 603 can reciprocate along the guide rail 3 602 driven by the cylinder 605. The strain gauge box is fixed to the top plate of the movable base 1, and the strain gauge box 8 is a rectangular parallelepiped with at least one cavity inside, which centrally stores strain gauges for easy access. The movable base 1 is provided with four wheels for easy transportation and movement.

[0034] During sample preparation, the sample 7 is clamped on the rotating air gripper 408. Due to the particularity of the position of the rotating air gripper 408, it is located on two horizontal platforms B307, and the center line in the width direction is automatically and accurately positioned. Then the servo motor 2 301 works to drive the forward and reverse screw rods to rotate, so as to achieve precise movement of the platform B307, thereby driving the second linear moving part 4 thereon to move, so as to adjust the center area of ​​the sample 7 to just below the grinding pen 601. The grinding pen 601 then moves downward under the push of the cylinder 605 to start grinding the sample 7. After the grinding is completed, the cylinder 605 retracts, the grinding pen 601 is lifted up, and the two rotating air grippers 408 rotate 180° synchronously to turn over the sample 7. The grinding pen 601 then moves downward under the push of the cylinder 605 to grind the other side. After the grinding is completed, the cylinder 605 retracts to lift the grinding pen 601. Driven by servo motor 2 301, sample 7 is moved to the glue dispensing pen 508, and servo motor module C504 drives integrated block 506 to move up and down on C axis 505, and glue dispensing pen 508 moves down to start glue dispensing. After glue dispensing is completed, servo motor module C504 drives integrated block 506 to drive glue dispensing pen 508 to return to the center position; with the cooperation of servo motor modules of each axis of three-axis module 5, integrated block 506 is moved to drive the accordion suction cup 507 thereon to move to the strain gauge box 8 to absorb the strain gauge, and bond the strain gauge to the glue dispensing position of sample 7, and then use pre-pressing head 509 to press the strain gauge; rotate the rotary air claw 408, turn over sample 7, repeat the above steps, and finally move sample 7 to the bottom of hot drying gun 606, heat and cure the strain gauge on one side, and then the two rotary air claws 408 rotate 180° synchronously, heat and cure the strain gauge on the other side, and complete the preparation of sample 7.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for automatically bonding strain gauges, comprising a movable base (1) at the bottom, a sample preparation system (2) being arranged on the top surface of the movable base (1), characterized in that: The sample preparation system (2) comprises a first linear moving part (3), a strain gauge box (8) is provided on one side of the first linear moving part (3), a second linear moving part (4) parallel to the first linear moving part (3) is connected directly above the first linear moving part (3), a sample (7) is provided on the second linear moving part (4), and a grinding system (6) and a three-axis module (5) are provided on both sides of the second linear moving part (4); The three-axis module (5) comprises an A-axis (503), a B-axis (501) and a C-axis (505) which are perpendicular to each other. The B-axis (501) is fixed on a support frame of the movable base (1). The A-axis (503) is fixed on the B-axis (501). A slider and a servo motor module A (502) are provided on the A-axis (503). The slider can slide back and forth along the A-axis (503) when driven by the servo motor module A (502). The C-axis (505) is fixed on the slider of the A-axis (503). The C-axis (505) can be moved back and forth when the servo motor module A (502) is driven. The servo motor module A (502) is driven to realize reciprocating motion along the A axis (503); the C axis (505) is provided with a servo motor module C (504) and an integrated block (506); the integrated block (506) is driven by the servo motor module C (504) to slide reciprocatingly along the C axis (505); two opposite sides of the integrated block (506) not in contact with the C axis (505) are respectively provided with an accordion suction cup (507) and a glue pen (508); and a pre-pressing head (509) is provided at the bottom of the C axis (505); The polishing system (6) is fixed to a fixed bracket on the top plate of the movable base (1) via an adapter plate. The polishing system (6) is provided with a polishing pen (601). The polishing pen (601) is fixed to the guide rail three (602) via a slider with a buckle (603). The polishing pen (601) can slide on the guide rail three (602). The slider with a buckle (603) is connected to the cylinder (605) via a connecting strip (604). The slider with a buckle (603) can reciprocate along the guide rail three (602) driven by the cylinder (605). A heat drying gun (606) is provided at the bottom of the connecting strip (604).

2. The device for automatically bonding strain gauges according to claim 1, characterized in that: The first linear moving part (3) comprises a platform B (307), and the second linear moving part (4) is provided with a servo motor 1 (401), and the servo motor 1 (401) is fixed on the platform B (307) via a fixed support 1 (402), and one end of the main shaft of the servo motor 1 (401) is connected to a coupling 1 (403), and the coupling 1 (403) is connected to a forward and reverse screw rod 1 (405) away from the main shaft end, and the two ends of the forward and reverse screw rod 1 (405) are respectively connected to a bearing support 1 (404), and the bearing support 1 (404) is fixed on the platform B (307) and is connected to the forward and reverse screw rod 1 A guide rail (406) is provided on each of the two parallel sides of (405), and the guide rail (406) is fixed on the platform B (307). Two platforms A (407) are connected to the guide rail (406), and the two platforms A (407) are in the same horizontal plane. The platform A (407) is connected to the forward and reverse screw (405) through fasteners. The platform A (407) can slide back and forth along the guide rail (406) driven by the forward and reverse screw (405). A rotating air gripper (408) is arranged on each of the two platforms A (407), and the rotating air gripper (408) clamps the sample (7).

3. The device for automatically bonding strain gauges according to claim 2, characterized in that: The two rotating air claws (408) are arranged opposite to each other.

4. The device for automatically bonding strain gauges according to claim 1, characterized in that: A servo motor 2 (301) is provided in the first linear moving part (3), and the servo motor 2 (301) is fixed to the movable base (1) via a fixed support 2 (302). A coupling 2 (303) is connected to the main shaft end of the servo motor 2 (301), and the coupling 2 (303) is connected to a forward and reverse screw rod 2 (305) away from the main shaft end. The two ends of the forward and reverse screw rod 2 (305) are each connected to a bearing support 2 (304), and the bearing support 2 (304) is fixed to the A second guide rail (306) is provided on each side of the top plate of the movable base (1) parallel to the second forward and reverse screw rod (305). The second guide rail (306) is fixed to the top plate of the movable base (1). The second guide rail (306) is connected to a platform B (307). The platform B (307) is connected to the second forward and reverse screw rod (305) via a fastener. The platform B (307) can slide back and forth along the second guide rail (306) driven by the second forward and reverse screw rod (305).

5. The device for automatically bonding strain gauges according to claim 1, characterized in that: The strain gauge box (8) is fixed on the top plate of the movable base (1), and the strain gauge box (8) is in the shape of a rectangular parallelepiped with at least one cavity inside.

6. The device for automatically bonding strain gauges according to claim 1, characterized in that: The movable base (1) is provided with four wheels.

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