Storage solder paste viscosity tester and testing method based on solder paste production

Abstract

The invention relates to the technical field of solder paste viscosity testing, and discloses a stored solder paste viscosity tester based on solder paste production and a testing method.The stored solder paste viscosity tester based on solder paste production comprises an equipment table, a constant-temperature assembly and a lifting assembly, and the constant-temperature assembly and the lifting assembly are fixedly installed above the equipment table; a control mechanism and a stirring mechanism are arranged above the constant-temperature assembly, through the arranged testing assembly, the control mechanism drives the rigid rotating shaft to rotate, certain shearing force is applied to the solder paste, the viscous resistance of the solder paste is measured and converted into a viscosity value, and therefore the viscosity range of the solder paste is obtained; then the rigid rotating shaft is driven by the control mechanism to move upwards, the flexible rotating shaft is exposed, in the upward moving process of the rigid rotating shaft, the flexible brush can pass through the carding groove in the inner wall of the rigid rotating shaft, the flexible brush can be carded and unfolded through the carding groove, the brush is made to make uniform contact with solder paste to be tested, and the actual use scene is simulated more accurately.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tin paste viscosity testing, in particular to a warehouse tin paste viscosity tester based on tin paste production and a testing method. BACKGROUND

[0002] In tin paste production, tin paste viscosity has a major impact on printing and welding quality. The warehouse environment can change the viscosity of the tin paste. If the viscosity does not meet the requirements, it can cause printing defects, welding defects and other problems. The warehouse tin paste viscosity tester is a device specially used to detect the viscosity of tin paste in the warehouse link. It applies a certain shear force to the tin paste through a specific measurement principle, using a rigid shaft or a flexible shaft, measures the viscous resistance of the tin paste and converts it into a viscosity value. It can help enterprises to real-time master the viscosity state of the warehouse tin paste, ensure its quality stability, and provide a reliable basis for subsequent production and use.

[0003] In the patent with the patent number CN215004828U, a tin paste viscosity testing machine is disclosed, which includes a material table, a material cylinder is placed on the material table, a viscosity detection assembly is arranged above the material cylinder, the viscosity testing assembly includes a lifting frame and a test probe rod fixed on the lifting frame, the test probe rod includes a fixed shaft and a rotating probe, the fixed shaft has a central shaft hole inside, a heating device and a connecting rod are arranged on the cylindrical surface of the fixed shaft, one end of the connecting rod is connected with the cylindrical surface of the fixed shaft, and the other end is provided with a temperature sensor; the rotating probe includes a rotating shaft and a probe, one end of the rotating shaft penetrates through the central shaft hole and is driven by a driving motor, and the other end is connected with the probe. The distance from the probe to the heating device is the same as the distance from the temperature sensor to the heating device. The heating device and the temperature sensor of the patent are arranged on the test probe rod. The heating device can directly heat the tin paste around the probe, and the efficiency is high.

[0004] The existing technology has the following defects: It is unable to maintain the unfolded state of the flexible brush before flexible shaft testing: the existing equipment directly puts the flexible shaft into the test tube containing tin paste when testing the flexible shaft, and the flexible brush of the flexible shaft will be curled and partially bent due to uneven stress, which will cause the brush to not uniformly contact the tested component, and will also squeeze the tin paste and make it unevenly distributed, thus unable to accurately simulate the contact state in actual use, and further affecting the accuracy of the test data, and unable to truly reflect the performance of the flexible shaft in the normal brush unfolded state. Therefore, a structure for maintaining the unfolded state of the flexible brush before flexible shaft testing is needed, so that the brush uniformly contacts the tested component, the brushing process is stable and comprehensive, the actual use scenario is more accurately simulated, and the detection accuracy and the simulation of the actual use contact state are improved.

[0005] The rigid shaft and the flexible shaft cannot be converted during the test process: the existing device can only test the rigid shaft or the flexible shaft, and a large amount of time is consumed for disassembly and installation if the test type needs to be changed, which reduces the efficiency; and the complex actual working conditions, such as the scene containing both rigid and flexible rotation requirements, cannot be simulated, and the test data cannot reflect the real performance; therefore, a structure capable of converting the rigid shaft and the flexible shaft during the test process is needed, so that the test process is smoother, and the complex actual working conditions can be accurately simulated, the test environment is more suitable for the real use scene, the data obtained can more accurately reflect the performance of the shaft under different conditions, and more reliable basis is provided for product research and development and quality evaluation, so that the test efficiency and the simulation of the actual use contact state are improved. SUMMARY

[0006] In view of the problems in the prior art that the unfolded state of the flexible brush cannot be maintained before the flexible shaft test, and the rigid shaft and the flexible shaft cannot be converted during the test process, a warehouse solder paste viscosity tester based on solder paste production and a test method are provided.

[0007] In one aspect of the present application, a warehouse solder paste viscosity tester based on solder paste production is provided, which aims to: by setting the control mechanism and the stirring mechanism, the unfolded state of the flexible brush is maintained before the flexible shaft test, the brush uniformly contacts the component to be tested, the brushing process is stable and comprehensive, the actual use scene is more accurately simulated, the rigid shaft and the flexible shaft can be converted during the test process, the test process is smoother, the complex actual working conditions can be accurately simulated, the test environment is more suitable for the real use scene, the data obtained can more accurately reflect the performance of the shaft under different conditions, more reliable basis is provided for product research and development and quality evaluation, and the detection accuracy, the test efficiency and the simulation of the actual use contact state are improved.

[0008] The technical scheme of the present application is: a warehouse solder paste viscosity tester based on solder paste production, comprising a device table, a constant temperature assembly and a lifting assembly fixedly installed above the device table, a control mechanism and a stirring mechanism are arranged above the constant temperature assembly, the stirring mechanism comprises a driving assembly and a sleeve assembly arranged in the control mechanism, and a test assembly arranged below the driving assembly and the sleeve assembly; The driving assembly comprises a driving shaft arranged in the control mechanism, and an inner shaft connecting barrel fixedly connected to the bottom of the driving shaft, and the sleeve assembly comprises an outer shaft connecting barrel arranged outside the driving shaft and the inner shaft connecting barrel; The test assembly comprises a flexible shaft threadedly connected with the inner wall of the inner shaft connecting barrel, and a rigid shaft threadedly connected with the inner wall of the outer shaft connecting barrel, the flexible shaft is arranged in the rigid shaft, a plurality of flexible brushes are fixedly installed on the outer wall of the flexible shaft, and a plurality of combing grooves are formed in the inner wall of the rigid shaft.

[0009] Adopting the above scheme, by setting the test component, the rigid shaft is driven to rotate by the control mechanism, a certain shear force is applied to the solder paste, the viscous resistance of the solder paste is measured and converted into a viscosity value, and thus the viscosity range of the solder paste is obtained; then the rigid shaft is driven to move up by the control mechanism, the flexible shaft is exposed, and in the process of moving up of the rigid shaft, the flexible brush passes through the combing groove of the inner wall of the rigid shaft, the combing groove combs the flexible brush, expands the flexible brush, and makes the brush uniformly contact the solder paste to be tested, so that the actual use scene is simulated more accurately, the control mechanism continues to drive the flexible shaft to rotate, and the viscosity of the solder paste in the proximity of the actual use state is accurately measured by rotating the flexible shaft.

[0010] Further, the sleeve assembly further comprises a plurality of sliding grooves and a plurality of extrusion grooves formed in the inner wall of the outer shaft connecting cylinder, the inner wall of each of the plurality of extrusion grooves is slidingly connected with an extrusion block, and the extrusion block and the outer shaft connecting cylinder are fixedly connected with an extension spring.

[0011] Further, the crossbar assembly comprises a sliding rod slidingly connected to the inner wall of the sliding groove, and a first fixed magnetic block and a second fixed magnetic block fixedly installed on the inner wall of the outer shaft connecting cylinder, the inner wall of the sliding rod is formed with a penetrating groove, the outer wall of the first fixed magnetic block is slidingly connected with the inner wall of the penetrating groove, the inner wall of the sliding rod is fixedly connected with a movable magnetic block, and the movable magnetic block is magnetically connected with the first fixed magnetic block and the second fixed magnetic block respectively.

[0012] Further, the driving assembly further comprises a guide block fixedly connected to the inner wall of the driving shaft, and the outer wall of the guide block abuts against the outer wall of the sliding rod.

[0013] Adopting the above scheme, when the rigid shaft needs to move up, the outer shaft connecting cylinder is lifted by the control mechanism, in the lifting process of the outer shaft connecting cylinder, the sliding rod in the inner part of the outer shaft connecting cylinder is extruded by the driving assembly, so that the movable magnetic block in the sliding rod is disconnected with the first fixed magnetic block, then the sliding rod slides in the sliding groove, when the sliding rod slides to a certain position, the movable magnetic block is attracted by the second fixed magnetic block, so that the outer shaft connecting cylinder is disconnected with the driving shaft; when the rigid shaft needs to move down, the extrusion block on the outer shaft connecting cylinder is pressed down by the control mechanism, after the outer shaft connecting cylinder moves down to contact the control mechanism, the circular pressing ring continues to press down, the extrusion block is pressed into the extrusion groove, so that the movable magnetic block in the sliding rod is disconnected with the second fixed magnetic block, then the sliding rod slides in the sliding groove, when the sliding rod slides to a certain position, the movable magnetic block is attracted by the first fixed magnetic block, so that the rigid shaft is reset.

[0014] Further, the control mechanism comprises a brushless motor, an output shaft of the brushless motor is sleeved outside the driving shaft, an outer wall of the brushless motor is fixedly connected with a control box, an inner wall of the control box abuts against an outer wall of the outer shaft connecting barrel, the inner wall of the control box is provided with an adjusting groove, and the adjusting groove is provided with an adjusting assembly.

[0015] Further, the adjusting assembly comprises an adjusting frame slidingly connected to the inner wall of the adjusting groove, an outer wall of the adjusting frame is fixedly connected with an arc-shaped lifting ring and a circular pressing ring, the arc-shaped lifting ring is located outside the outer shaft connecting barrel, the circular pressing ring is located above the extrusion block, and an end of the adjusting frame away from the outer shaft connecting barrel is fixedly connected with an adjusting push button, and the adjusting push button is arranged outside the control box.

[0016] By adopting the above scheme, the brushless motor is operated, and the output shaft of the brushless motor drives the driving shaft to rotate; when the rigid rotating shaft needs to be moved upward, the adjusting push button is pushed upward, the adjusting push button drives the adjusting frame to slide in the adjusting groove, and the arc-shaped lifting ring on the adjusting frame lifts the outer shaft connecting barrel; when the rigid rotating shaft needs to be moved downward, the adjusting push button is pulled downward, and the circular pressing ring on the adjusting frame presses the extrusion block on the outer shaft connecting barrel.

[0017] Further, the lifting assembly comprises a lifting frame fixedly installed on the outer wall of the control box, an inner wall of the lifting frame is threadedly connected with a lifting threaded rod, an outer wall of the lifting threaded rod is rotatably connected with a lifting table, and a bottom of the lifting table is fixedly connected with a top of the equipment table.

[0018] Further, the constant-temperature assembly comprises a constant-temperature box fixedly installed above the equipment table, an inner wall of the constant-temperature box is fixedly connected with a clamping seat, the clamping seat is clamped with a test tube, and the test tube is located directly below the rigid rotating shaft and the flexible rotating shaft.

[0019] By adopting the above scheme, the lifting assembly and the constant-temperature assembly are arranged, in operation, the test tube filled with the solder paste is placed on the clamping seat in the constant-temperature box, the constant-temperature box is operated, the solder paste is kept in a stable temperature environment, and the stable temperature can ensure the accuracy of the test result; the lifting table is operated, the lifting table drives the lifting frame through the lifting threaded rod, and then the control box is moved downward until the rigid rotating shaft is immersed in the solder paste in the test tube.

[0020] In another aspect of the present application, a test method of a warehouse solder paste viscosity tester based on solder paste production is provided, comprising the following steps: Step one: placing the test tube filled with the solder paste on the clamping seat in the constant-temperature box and operating the constant-temperature box; Step two: operating the lifting table to move the control box downward so that the rigid rotating shaft is immersed in the test tube; Step three: operating the brushless motor to drive the rigid rotating shaft to rotate for preliminary testing and obtaining the viscosity range of the solder paste. Step four: push the adjusting push button, and lift the outer shaft connecting cylinder through the arc-shaped lifting ring; Step five: when the outer shaft connecting cylinder is lifted, disconnect the outer shaft connecting cylinder from the driving shaft through the cross bar assembly and the guide block; Step six: the rigid rotating shaft is lifted, the flexible rotating shaft is exposed from the rigid rotating shaft, and the flexible brush is combed and unfolded through the combing groove; Step seven: the viscosity of the flexible rotating shaft in the actual use state is accurately measured through rotation; Step eight: if the viscosity performance of the solder paste under stable high shear force needs to be detected, the outer shaft connecting cylinder can be pressed down to reset the rigid rotating shaft.

[0021] According to the above scheme, the test tube filled with solder paste is placed on the clamping seat in the thermostat, the thermostat is operated, the lifting platform is operated, the lifting platform drives the lifting frame through the lifting threaded rod, and then the control box is lowered until the rigid rotating shaft is immersed in the solder paste in the test tube, then the brushless motor is operated, the output shaft of the brushless motor drives the driving shaft to rotate, and the driving shaft rotates to drive the outer shaft connecting cylinder to rotate, thereby driving the rigid rotating shaft to rotate; then the adjusting push button is pushed up, the adjusting push button drives the adjusting frame to slide in the adjusting groove, the arc-shaped lifting ring on the adjusting frame lifts the outer shaft connecting cylinder, and the sliding rod in the outer shaft connecting cylinder is extruded by the guide block during the lifting process of the outer shaft connecting cylinder, so that the movable magnetic block in the sliding rod is disconnected from the first fixed magnetic block, then the sliding rod slides in the sliding groove, and when the sliding rod slides to a certain position, the movable magnetic block is attracted by the second fixed magnetic block, so that the outer shaft connecting cylinder is disconnected from the driving shaft; when the outer shaft connecting cylinder is lifted, the rigid rotating shaft is lifted, thereby exposing the flexible rotating shaft, and in the process of lifting the rigid rotating shaft, the flexible brush passes through the combing groove on the inner wall of the rigid rotating shaft, the combing groove combs the flexible brush to unfold it, so that the brush uniformly contacts the solder paste to be tested; if the viscosity performance of the solder paste under stable high shear force needs to be detected, the adjusting push button can be pulled down, the circular pressing ring on the adjusting frame presses the extrusion block on the outer shaft connecting cylinder, and after the outer shaft connecting cylinder is lowered to contact the control box, the circular pressing ring continues to be pressed down, the extrusion block is pressed into the extrusion groove, so that the movable magnetic block in the sliding rod is disconnected from the second fixed magnetic block, then the sliding rod slides in the sliding groove, and when the sliding rod slides to a certain position, the movable magnetic block is attracted by the first fixed magnetic block, so that the rigid rotating shaft is reset; and the rigid rotating shaft and the flexible rotating shaft can be replaced below the outer shaft connecting cylinder and the inner shaft connecting cylinder respectively, so that the cleaning operation is more convenient and simple.

[0022] The beneficial effects of the present application are as follows: 1. By setting the test component, the rigid shaft is driven to rotate by the control mechanism, a certain shear force is applied to the solder paste, the viscosity of the solder paste is measured and converted into viscosity value, and thus the viscosity range of the solder paste is obtained; then the rigid shaft is driven to move up by the control mechanism, the flexible shaft is exposed, and in the process of moving up of the rigid shaft, the flexible brush passes through the combing groove of the inner wall of the rigid shaft, the combing groove combs the flexible brush, expands it, and makes the brush uniformly contact the solder paste to be tested, more accurately simulates the actual use scene, and the control mechanism continues to drive the flexible shaft to rotate, and the viscosity of the solder paste in the proximity of the actual use state is accurately measured through the rotation of the flexible shaft.

[0023] 2. By setting the sleeve assembly and the cross rod assembly, when the rigid shaft needs to move up, the outer shaft connecting cylinder is lifted by the control mechanism, the sliding rod in the outer shaft connecting cylinder is extruded by the driving assembly in the lifting process, the movable magnetic block in the sliding rod is disconnected with the first fixed magnetic block, then the sliding rod slides in the sliding groove, when the sliding rod slides to a certain position, the movable magnetic block is attracted by the second fixed magnetic block, so that the outer shaft connecting cylinder is disconnected with the driving shaft; when the rigid shaft needs to move down, the extrusion block on the outer shaft connecting cylinder is pressed down by the control mechanism, the outer shaft connecting cylinder is moved down to contact the control mechanism, then the circular pressing ring continues to press down, the extrusion block is pressed into the extrusion groove, so that the movable magnetic block in the sliding rod is disconnected with the second fixed magnetic block, then the sliding rod slides in the sliding groove, when the sliding rod slides to a certain position, the movable magnetic block is attracted by the first fixed magnetic block, so that the rigid shaft is reset.

[0024] 3. By setting the control mechanism, the brushless motor is operated, and the output shaft of the brushless motor drives the driving shaft to rotate; when the rigid shaft needs to move up, the adjusting push button is pushed up, the adjusting push button drives the adjusting frame to slide in the adjusting groove, and the arc-shaped lifting ring on the adjusting frame lifts the outer shaft connecting cylinder; when the rigid shaft needs to move down, the adjusting push button is pulled down, and the circular pressing ring on the adjusting frame presses down the extrusion block on the outer shaft connecting cylinder, so that the conversion of the rigid shaft and the flexible shaft can be realized when the equipment is running. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the structure of the lifting assembly of the present application; Figure 3 It is a schematic diagram of the structure of the constant temperature assembly of the present application; Figure 4 It is a schematic diagram of the structure of the control mechanism of the present application; Figure 5 It is a schematic diagram of the structure of the stirring mechanism of the present application; Figure 6 It is a schematic diagram of the structure of the adjusting assembly of the present application; Figure 7Structure schematic view of the sleeve assembly of the application; Figure 8 Structure schematic view of the sleeve assembly of the application; Figure 7 Structure schematic view of the sleeve assembly of the application; Figure 9 Structure schematic view of the sleeve assembly of the application; Figure 10 Structure schematic view of the sleeve assembly of the application; Figure 11 Structure schematic view of the sleeve assembly of the application; Figure 10 Structure schematic view of the sleeve assembly of the application; Figure 12 Process state schematic view of the rigid rotating shaft upward movement of the application.

[0026] 1, equipment table; 2, constant temperature assembly; 21, constant temperature box; 22, clamping seat; 23, test tube; 3, lifting assembly; 31, lifting table; 32, lifting threaded rod; 33, lifting frame; 4, control mechanism; 41, brushless motor; 42, control box; 43, adjusting groove; 44, adjusting assembly; 441, adjusting push button; 442, adjusting frame; 443, arc-shaped lifting ring; 444, circular pressing ring; 5, stirring mechanism; 51, driving assembly; 511, driving shaft; 512, guide block; 513, inner shaft connecting cylinder; 52, sleeve assembly; 521, outer shaft connecting cylinder; 522, sliding groove; 523, extrusion groove; 524, extension spring; 525, extrusion block; 53, test assembly; 531, rigid rotating shaft; 532, flexible rotating shaft; 533, combing groove; 534, flexible brush; 54, crossbar assembly; 541, sliding rod; 542, penetrating groove; 543, movable magnetic block; 544, first fixed magnetic block; 545, second fixed magnetic block. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the application more obvious and easy to understand, the specific embodiments of the application will be described in detail below with reference to the accompanying drawings.

[0028] Example 1, refer to Figure 1 - Figure 12 The first embodiment of the application provides a warehouse tin paste viscosity tester based on tin paste production, which comprises an equipment table 1, a constant temperature assembly 2 and a lifting assembly 3 fixedly installed above the equipment table 1, a control mechanism 4 and a stirring mechanism 5 arranged above the constant temperature assembly 2, the stirring mechanism 5 comprising a driving assembly 51 and a sleeve assembly 52 arranged inside the control mechanism 4, and a test assembly 53 arranged below the driving assembly 51 and the sleeve assembly 52.

[0029] Refer to Figure 5 - Figure 11 ​The drive assembly 51 includes a drive shaft 511 disposed inside the control mechanism 4, and an inner shaft connecting cylinder 513 is fixedly connected to the bottom of the drive shaft 511. The housing assembly 52 includes an outer shaft connecting cylinder 521 disposed outside the drive shaft 511 and the inner shaft connecting cylinder 513. The test assembly 53 includes a flexible rotating shaft 532 threadedly connected to the inner wall of the inner shaft connecting cylinder 513, and a rigid rotating shaft 531 threadedly connected to the inner wall of the outer shaft connecting cylinder 521. The flexible rotating shaft 532 is disposed inside the rigid rotating shaft 531. Multiple flexible brushes 534 are fixedly installed on the outer wall of the flexible rotating shaft 532, and multiple combing grooves 533 are opened on the inner wall of the rigid rotating shaft 531.

[0030] Specifically, the constant temperature component 2 provides stable temperature conditions for the testing environment. Since temperature has a significant impact on the viscosity of solder paste, only by conducting tests at a constant temperature can the accuracy and reliability of the test results be ensured. The lifting component 3 can flexibly adjust the height of the test component, making it easy to accurately place the test component 53 into the solder paste to be tested. The flexible rotating shaft 532 is located inside the rigid rotating shaft 531, allowing the tester to flexibly switch between the flexible rotating shaft 532 and the rigid rotating shaft 531 according to different testing needs. The flexible brush 534 can fully contact the solder paste during the test, more accurately simulating the flow state of the solder paste in actual use. The inner wall of the rigid rotating shaft 531 has multiple combing grooves 533. When the rigid rotating shaft 531 and the flexible rotating shaft 532 move relative to each other, the combing grooves 533 can comb the flexible brush 534, keeping it in a good unfolded state and ensuring the accuracy of the test results.

[0031] The rigid shaft 531 is driven to rotate by the control mechanism 4 through the set test component 53, applying a certain shear force to the solder paste, measuring the viscous resistance of the solder paste and converting it into a viscosity value, thereby obtaining the viscosity range of the solder paste; then the rigid shaft 531 is driven to move upward by the control mechanism 4, exposing the flexible shaft 532. During the upward movement of the rigid shaft 531, the flexible brush 534 will pass through the combing groove 533 on the inner wall of the rigid shaft 531. The combing groove 533 will comb the flexible brush 534, making it spread out and allowing the brush to evenly contact the solder paste to be tested, more accurately simulating the actual use scenario. The control mechanism 4 continues to drive the flexible shaft 532 to rotate, and the viscosity of the solder paste under near-actual use conditions is accurately measured by the rotation of the flexible shaft 532.

[0032] Reference Figure 5 - Figure 10The housing assembly 52 also includes multiple sliding grooves 522 and multiple extrusion grooves 523 formed on the inner wall of the outer shaft connecting cylinder 521. Each extrusion groove 523 has an extrusion block 525 slidably connected to its inner wall. A telescopic spring 524 is fixedly connected between the extrusion block 525 and the outer shaft connecting cylinder 521. Each sliding groove 522 has a crossbar assembly 54 on its inner wall. The crossbar assembly 54 includes a sliding rod 541 slidably connected to the inner wall of the sliding groove 522, and a first fixing magnet fixedly installed on the inner wall of the outer shaft connecting cylinder 521. The slide rod 541 has a through groove 542 on its inner wall. The outer wall of the first fixed magnetic block 544 is slidably connected to the inner wall of the through groove 542. The inner wall of the slide rod 541 is fixedly connected to a movable magnetic block 543. The movable magnetic block 543 is magnetically connected to the first fixed magnetic block 544 and the second fixed magnetic block 545 respectively. The drive assembly 51 also includes a guide block 512 fixedly connected to the inner wall of the drive shaft 511. The outer wall of the guide block 512 abuts against the outer wall of the slide rod 541.

[0033] Specifically, the movable magnetic block 543 is magnetically connected to the first fixed magnetic block 544 and the second fixed magnetic block 545 respectively. When the slide rod 541 slides to different positions in the slide groove 522, the movable magnetic block 543 will attract the first fixed magnetic block 544 or the second fixed magnetic block 545, causing the slide rod 541 to move to both ends of the slide groove 522.

[0034] With the sleeve assembly 52 and crossbar assembly 54 in place, when the rigid rotating shaft 531 needs to move upward, the outer shaft connecting cylinder 521 is lifted by the control mechanism 4. During the lifting process, the slide rod 541 inside the outer shaft connecting cylinder 521 is squeezed by the drive assembly 51, causing the movable magnetic block 543 inside the slide rod 541 to disconnect from the first fixed magnetic block 544. Then, the slide rod 541 slides in the slide groove 522. When the slide rod 541 slides to a certain position, the movable magnetic block 543 is attracted by the second fixed magnetic block 545, causing the outer shaft connecting cylinder 521 to connect with the drive shaft 51. 1. Disconnection: When the rigid shaft 531 needs to move down, the control mechanism 4 presses down the pressing block 525 on the outer shaft connecting cylinder 521. After the outer shaft connecting cylinder 521 moves down to contact the control mechanism 4, the circular pressing ring 444 continues to press down, and the pressing block 525 is pressed into the pressing groove 523, so that the movable magnetic block 543 in the slide rod 541 is disconnected from the second fixed magnetic block 545. Then the slide rod 541 slides in the slide groove 522. When the slide rod 541 slides to a certain position, the movable magnetic block 543 is attracted by the first fixed magnetic block 544, so that the rigid shaft 531 is reset.

[0035] Reference Figure 4 - Figure 7The control mechanism 4 comprises a brushless motor 41, an output shaft of the brushless motor 41 is sleeved outside the driving shaft 511, an outer wall of the brushless motor 41 is fixedly connected with a control box 42, an inner wall of the control box 42 abuts against an outer wall of the outer shaft connecting barrel 521, the inner wall of the control box 42 is provided with an adjusting groove 43, and the adjusting groove 43 is provided with an adjusting assembly 44. The adjusting assembly 44 comprises an adjusting frame 442 which is slidingly connected to the inner wall of the adjusting groove 43, an outer wall of the adjusting frame 442 is fixedly connected with an arc-shaped lifting ring 443 and a circular pressing ring 444, the arc-shaped lifting ring 443 is located outside the outer shaft connecting barrel 521, the circular pressing ring 444 is located above the extrusion block 525, and an end of the adjusting frame 442 away from the outer shaft connecting barrel 521 is fixedly connected with an adjusting push button 441. The adjusting push button 441 is arranged outside the control box 42.

[0036] By arranging the control mechanism 4, the brushless motor 41 is operated, and the output shaft of the brushless motor 41 drives the driving shaft 511 to rotate. When the rigid rotating shaft 531 needs to be moved upward, the adjusting push button 441 is pushed upward, the adjusting push button 441 drives the adjusting frame 442 to slide in the adjusting groove 43, and the arc-shaped lifting ring 443 on the adjusting frame 442 lifts the outer shaft connecting barrel 521. When the rigid rotating shaft 531 needs to be moved downward, the adjusting push button 441 is pulled downward, and the circular pressing ring 444 on the adjusting frame 442 presses the extrusion block 525 on the outer shaft connecting barrel 521.

[0037] Referring to Figure 2 Figure 10 The lifting assembly 3 comprises a lifting frame 33 which is fixedly installed on the outer wall of the control box 42, the inner wall of the lifting frame 33 is threadedly connected with a lifting threaded rod 32, the outer wall of the lifting threaded rod 32 is rotationally connected with a lifting table 31, and the bottom of the lifting table 31 is fixedly connected with the top of the equipment table 1. The constant-temperature assembly 2 comprises a constant-temperature box 21 which is fixedly installed above the equipment table 1, the inner wall of the constant-temperature box 21 is fixedly connected with a clamping seat 22, and the clamping seat 22 is clamped with a test tube 23. The test tube 23 is located directly below the rigid rotating shaft 531 and the flexible rotating shaft 532.

[0038] By arranging the lifting assembly 3 and the constant-temperature assembly 2, when in operation, the test tube 23 filled with tin paste is placed on the clamping seat 22 in the constant-temperature box 21, the constant-temperature box 21 is operated, so that the tin paste is in a stable temperature environment, and the stable temperature can ensure the accuracy of the test result. The lifting table 31 is operated, the lifting table 31 drives the lifting frame 33 through the lifting threaded rod 32, and then the control box 42 is moved downward until the rigid rotating shaft 531 is immersed in the tin paste in the test tube 23.

[0039] ​During use, the test tube 23 filled with tin paste is placed on the clamping seat 22 in the thermostat 21, the thermostat 21 is operated, the lifting platform 31 is operated, the lifting platform 31 drives the lifting frame 33 through the lifting threaded rod 32, and then the control box 42 is lowered until the rigid rotating shaft 531 is immersed in the tin paste in the test tube 23, then the brushless motor 41 is operated, the output shaft of the brushless motor 41 drives the driving shaft 511 to rotate, and the driving shaft 511 rotates to drive the outer shaft connecting barrel 521 to rotate through the slide rod 541, thereby driving the rigid rotating shaft 531 to rotate; then the adjusting push button 441 is pushed up, the adjusting push button 441 drives the adjusting frame 442 to slide in the adjusting groove 43, and the arc-shaped lifting ring 443 on the adjusting frame 442 lifts the outer shaft connecting barrel 521; during the lifting process of the outer shaft connecting barrel 521, the slide rod 541 in the outer shaft connecting barrel 521 is extruded by the guide block 512, so that the movable magnetic block 543 in the slide rod 541 is disconnected from the first fixed magnetic block 544, and then the slide rod 541 slides in the sliding groove 522; when the slide rod 541 slides to a certain position, the movable magnetic block 543 is attracted by the second fixed magnetic block 545, so that the outer shaft connecting barrel 521 is disconnected from the driving shaft 511; when the outer shaft connecting barrel 521 moves upwards, the rigid rotating shaft 531 moves upwards, thereby exposing the flexible rotating shaft 532; during the upward movement of the rigid rotating shaft 531, the flexible brush 534 passes through the combing groove 533 in the inner wall of the rigid rotating shaft 531, the combing groove 533 combs the flexible brush 534, so that the flexible brush 534 is unfolded and the brush uniformly contacts the tin paste to be tested; if it is necessary to detect the viscosity performance of the tin paste under stable high shear force, the adjusting push button 441 can be pulled down, the circular pressing ring 444 on the adjusting frame 442 presses the extrusion block 525 on the outer shaft connecting barrel 521, and after the outer shaft connecting barrel 521 moves downwards to contact the control box 42, the circular pressing ring 444 continues to press downwards, the extrusion block 525 is pressed into the extrusion groove 523, so that the movable magnetic block 543 in the slide rod 541 is disconnected from the second fixed magnetic block 545, and then the slide rod 541 slides in the sliding groove 522; when the slide rod 541 slides to a certain position, the movable magnetic block 543 is attracted by the first fixed magnetic block 544, so that the rigid rotating shaft 531 is reset; and the rigid rotating shaft 531 and the flexible rotating shaft 532 can be replaced below the outer shaft connecting barrel 521 and the inner shaft connecting barrel 513 respectively, so that the cleaning operation is more convenient and simple.

[0040] Embodiment 2, refer to Figure 1 Figure 12 The second embodiment of the present application provides a test method of a warehouse tin paste viscosity tester based on tin paste production, which comprises the following steps: Step one: place the test tube 23 filled with tin paste on the clamping seat 22 in the thermostat 21, and operate the thermostat 21; Step two: operate the lifting platform 31 to lower the control box 42, and make the rigid rotating shaft 531 inserted into the test tube 23; ​Step three: run the brushless motor 41 to drive the rigid rotating shaft 531 to rotate for preliminary test, and obtain the viscosity range of the solder paste; Step four: push up the adjusting push button 441, and lift the outer shaft connecting cylinder 521 through the arc-shaped lifting ring 443; Step five: when the outer shaft connecting cylinder 521 is lifted, the outer shaft connecting cylinder 521 is disconnected with the driving shaft 511 through the horizontal rod assembly 54 and the guide block 512; Step six: the rigid rotating shaft 531 is lifted, the flexible rotating shaft 532 is exposed from the rigid rotating shaft 531, and the flexible brush 534 is combed and unfolded through the combing groove 533; Step seven: rotate the flexible rotating shaft 532 to accurately measure the viscosity in the actual use state; Step eight: if it is necessary to detect the viscosity performance of the solder paste under stable high shear force, the outer shaft connecting cylinder 521 can be pressed down, so that the rigid rotating shaft 531 is reset.

[0041] Working principle of the present application: When operating, the test tube 23 filled with the solder paste is placed on the clamping seat 22 in the thermostat 21, and the thermostat 21 is operated, so that the solder paste is in a stable temperature environment, and the stable temperature can ensure the accuracy of the test result.

[0042] The lifting platform 31 is operated, the lifting platform 31 drives the lifting frame 33 through the lifting screw rod 32, and then the control box 42 is lowered until the rigid rotating shaft 531 is immersed in the solder paste in the test tube 23, then the brushless motor 41 is operated, the output shaft of the brushless motor 41 drives the driving shaft 511 to rotate, and when the driving shaft 511 rotates, the outer shaft connecting cylinder 521 is driven to rotate through the slide rod 541, so that the rigid rotating shaft 531 is driven to rotate, a certain shear force is applied to the solder paste, the viscous resistance of the solder paste is measured and converted into a viscosity value, and thus the viscosity range of the solder paste is obtained.

[0043] Then the adjusting push button 441 is pushed up, the adjusting push button 441 drives the adjusting frame 442 to slide in the adjusting groove 43, the arc-shaped lifting ring 443 on the adjusting frame 442 lifts the outer shaft connecting cylinder 521, and in the lifting process, the slide rod 541 in the outer shaft connecting cylinder 521 is extruded by the guide block 512, so that the movable magnetic block 543 in the slide rod 541 is disconnected with the first fixed magnetic block 544, then the slide rod 541 slides in the sliding groove 522, and when the slide rod 541 slides to a certain position, the movable magnetic block 543 is attracted by the second fixed magnetic block 545, so that the outer shaft connecting cylinder 521 is disconnected with the driving shaft 511.

[0044] When the outer shaft connecting cylinder 521 moves up, the rigid rotating shaft 531 moves up, thereby exposing the flexible rotating shaft 532. During the movement of the rigid rotating shaft 531, the flexible brush 534 passes through the combing groove 533 on the inner wall of the rigid rotating shaft 531. The combing groove 533 combs the flexible brush 534, expands it, and makes the brush evenly contact the solder paste to be tested, so as to more accurately simulate the actual use scenario. The driving shaft 511 continues to drive the flexible rotating shaft 532 to rotate, and the viscosity of the solder paste under the condition close to the actual use state is accurately measured through the rotation of the flexible rotating shaft 532.

[0045] If it is necessary to detect the viscosity performance of the solder paste under stable high shear force, the push button 441 is pulled down to adjust the circular pressing ring 444 on the adjusting frame 442 to press the extrusion block 525 on the outer shaft connecting cylinder 521. After the outer shaft connecting cylinder 521 moves down to contact the control box 42, the circular pressing ring 444 continues to press down, the extrusion block 525 is pressed into the extrusion groove 523, the movable magnetic block 543 in the slide rod 541 is disconnected from the second fixed magnetic block 545, then the slide rod 541 slides in the sliding groove 522, when the slide rod 541 slides to a certain position, the movable magnetic block 543 is attracted by the first fixed magnetic block 544, so that the rigid rotating shaft 531 is reset. The viscosity of the solder paste under this condition is measured by rotating the rigid rotating shaft 531 again to apply high shear force to the solder paste.

[0046] During the resetting of the rigid rotating shaft 531, the combing groove 533 on the inner wall of the rigid rotating shaft 531 combs the flexible brush 534 and extrudes the solder paste between the flexible brushes 534, so as to avoid the change of the capacity of the solder paste. The rigid rotating shaft 531 and the flexible rotating shaft 532 can be replaced below the outer shaft connecting cylinder 521 and the inner shaft connecting cylinder 513 respectively, so that the cleaning operation is more convenient and simple.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A tin paste viscosity tester based on tin paste production, comprising a device table (1), a constant temperature assembly (2) and a lifting assembly (3) fixedly installed above the device table (1), characterized in that: The constant temperature assembly (2) is provided with a control mechanism (4) and a stirring mechanism (5) above, the stirring mechanism (5) comprises a driving assembly (51) and a sleeve assembly (52) arranged inside the control mechanism (4), and a test assembly (53) arranged below the driving assembly (51) and the sleeve assembly (52); The driving assembly (51) comprises a driving shaft (511) arranged inside the control mechanism (4), and the bottom of the driving shaft (511) is fixedly connected with an inner shaft connecting barrel (513); the sleeve assembly (52) comprises an outer shaft connecting barrel (521) arranged outside the driving shaft (511) and the inner shaft connecting barrel (513); The test assembly (53) comprises a flexible rotating shaft (532) threadedly connected with the inner wall of the inner shaft connecting barrel (513), and a rigid rotating shaft (531) threadedly connected with the inner wall of the outer shaft connecting barrel (521); the flexible rotating shaft (532) is arranged inside the rigid rotating shaft (531); the outer wall of the flexible rotating shaft (532) is fixedly provided with a plurality of flexible brushes (534); and the inner wall of the rigid rotating shaft (531) is provided with a plurality of combing grooves (533).

2. The warehouse tin paste viscosity tester based on tin paste production according to claim 1, characterized in that: The sleeve assembly (52) further comprises a plurality of sliding grooves (522) and a plurality of extrusion grooves (523) formed in the inner wall of the outer shaft connecting barrel (521); the inner wall of each of the plurality of extrusion grooves (523) is slidably connected with an extrusion block (525); the extrusion block (525) and the outer shaft connecting barrel (521) are fixedly connected with an elastic spring (524); and the inner wall of each of the plurality of sliding grooves (522) is provided with a cross rod assembly (54).

3. The warehouse tin paste viscosity tester based on tin paste production according to claim 2, characterized in that: The cross rod assembly (54) comprises a sliding rod (541) slidably connected with the inner wall of the sliding groove (522), a first fixed magnetic block (544) and a second fixed magnetic block (545) fixedly arranged on the inner wall of the outer shaft connecting barrel (521); the inner wall of the sliding rod (541) is provided with a penetrating groove (542); the outer wall of the first fixed magnetic block (544) is slidably connected with the inner wall of the penetrating groove (542); the inner wall of the sliding rod (541) is fixedly connected with a movable magnetic block (543); and the movable magnetic block (543) is magnetically connected with the first fixed magnetic block (544) and the second fixed magnetic block (545) respectively.

4. The warehouse tin paste viscosity tester based on tin paste production according to claim 3, characterized in that: The driving assembly (51) further comprises a guide block (512) fixedly connected with the inner wall of the driving shaft (511); and the outer wall of the guide block (512) abuts against the outer wall of the sliding rod (541).

5. The warehouse tin paste viscosity tester based on tin paste production according to claim 4, characterized in that: The control mechanism (4) comprises a brushless motor (41); the output shaft of the brushless motor (41) is sleeved outside the driving shaft (511); the outer wall of the brushless motor (41) is fixedly connected with a control box (42); the inner wall of the control box (42) abuts against the outer wall of the outer shaft connecting barrel (521); the inner wall of the control box (42) is provided with an adjusting groove (43); and the adjusting groove (43) is provided with an adjusting assembly (44).

6. The warehouse tin paste viscosity tester based on tin paste production according to claim 5, characterized in that: The adjusting assembly (44) comprises an adjusting frame (442) slidably connected to the inner wall of the adjusting groove (43), the outer wall of the adjusting frame (442) is fixedly connected with an arc-shaped lifting ring (443) and a circular pressing ring (444), the arc-shaped lifting ring (443) is located outside the outer shaft connecting barrel (521), the circular pressing ring (444) is located above the extrusion block (525), and the end of the adjusting frame (442) away from the outer shaft connecting barrel (521) is fixedly connected with an adjusting push button (441), and the adjusting push button (441) is arranged outside the control box (42).

7. The warehouse tin paste viscosity tester based on tin paste production according to claim 6, characterized in that: The lifting assembly (3) comprises a lifting frame (33) fixedly installed on the outer wall of the control box (42), the inner wall of the lifting frame (33) is threadedly connected with a lifting threaded rod (32), the outer wall of the lifting threaded rod (32) is rotatably connected with a lifting table (31), and the bottom of the lifting table (31) is fixedly connected with the top of the equipment table (1).

8. The warehouse tin paste viscosity tester based on tin paste production according to claim 7, characterized in that: The constant-temperature assembly (2) comprises a constant-temperature box (21) fixedly installed above the equipment table (1), the inner wall of the constant-temperature box (21) is fixedly connected with a clamping seat (22), the inner wall of the clamping seat (22) is clamped with a test tube (23), and the test tube (23) is located directly below the rigid rotating shaft (531) and the flexible rotating shaft (532).

9. A test method of a tin paste viscosity tester for tin paste production based on the tin paste viscosity tester for tin paste production based on claim 8, characterized by, The method comprises the following steps: Step one: place the test tube (23) filled with tin paste on the clamping seat (22) in the constant-temperature box (21), and run the constant-temperature box (21); Step two: run the lifting table (31) to move the control box (42) downward, so that the rigid rotating shaft (531) is immersed in the test tube (23); Step three: run the brushless motor (41) to drive the rigid rotating shaft (531) to rotate for preliminary testing, and obtain the viscosity range of the tin paste; Step four: push the adjusting push button (441) upward, and lift the outer shaft connecting barrel (521) through the arc-shaped lifting ring (443); Step five: when the outer shaft connecting barrel (521) is lifted, the outer shaft connecting barrel (521) and the driving shaft (511) are disconnected through the horizontal rod assembly (54) and the guide block (512); Step six: the rigid rotating shaft (531) is lifted upward, the flexible rotating shaft (532) is exposed from the rigid rotating shaft (531), and the flexible brush (534) is combed to be unfolded through the combing groove (533); Step seven: rotate the flexible rotating shaft (532) to accurately measure the viscosity in the actual use state; Step eight: if it is necessary to detect the viscosity performance of the tin paste under stable high shear force, the outer shaft connecting barrel (521) can be pressed downward, so that the rigid rotating shaft (531) is reset.

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