Elastic force testing machine and inspection method thereof

Abstract

The present invention relates to an elastic force testing machine and a spot inspection method thereof, comprising a machine platform and a test platform, a storage bin, a test device, and a moving mechanism arranged on the machine platform. The test platform is provided with materials for elastic force testing, and the elastic force testing is moved between the storage bin and the test platform by the driving of the moving mechanism. The test device comprises a plurality of sensing components distributed in a matrix, the sensing components comprise a force sensor and a probe, the probe is arranged at the sensing end of the force sensor, a plurality of weights for spot inspection of each force sensor are placed in the storage bin, and the probe has a first contact portion that contacts with the material during elastic force testing, and a second contact portion that contacts with the weight during spot inspection and takes the weight out of the storage bin. The present invention separates the spot inspection and the test by the first contact portion that cannot be magnetized and the second contact portion that can be magnetized or has magnetism on the probe, so that all force sensors on the machine platform can be inspected at one time, eliminating the complicated manual hanging of weights and manual confirmation of data.

Description

Technical Field

[0001] The invention relates to the technical field of spring pin production, and in particular to an elastic force testing machine and a spot inspection method thereof. Background Art

[0002] A spring pin is a spring-type probe composed of three basic components: a pin shaft, a spring, and a pin tube. It is widely used in semiconductor devices to provide electrical connections. After the spring pin is assembled, a spring force test is required to ensure its consistency. The test process involves placing multiple spring pins on a tray, and a spring tester performs a spring force test on the spring pins on the tray. Existing spring testers are generally designed with only one or a row of spring force test probes, and can only test one or several spring pins at a time, so the test efficiency needs to be improved. Summary of the invention

[0003] In order to solve the deficiencies of the prior art, the present invention provides an elastic force testing machine, which can inspect all force measuring sensors on the machine at one time, eliminating the complicated manual hanging of weights and manual confirmation of data, and can perform elastic force tests on multiple spring pins at a time.

[0004] In order to solve the deficiencies of the prior art, the present invention also provides a spot inspection method for an elastic force testing machine.

[0005] To achieve the above-mentioned purpose, the technical solution provided by the present invention is: an elastic force testing machine, including a machine platform and a test platform, a storage bin, a test device, and a moving mechanism arranged on the machine platform, the test platform is used to place materials for elastic force testing, and the elastic force testing is moved between the storage bin and the test platform by the drive of the moving mechanism; the test device includes a plurality of sensing components distributed in a matrix, the sensing components include a force sensor and a probe, the probe is arranged at the sensing end of the force sensor, the storage bin is provided with a plurality of weights for spot checking each force sensor, the probe has a first contact portion that contacts the material during elastic force testing, and a second contact portion that contacts the weight during spot checking and lifts the weight out of the storage bin.

[0006] In the above technical solution, the storage bin includes a bin body, a movable plate, and a driving member. The movable plate is movably arranged on the bin body through the driving member. The bin body is provided with a plurality of storage cavities for placing weights along the thickness direction. The movable plate is provided with a locking portion for locking and unlocking the weights in the storage cavity. In the locked state, the locking portion is located in the direction in which the weights are separated from the storage cavity to prevent the weights from separating from the storage cavity; in the unlocked state, the locking portion is not in the direction in which the weights are separated from the storage cavity, and the movable plate is switched between the locked state and the unlocked state through the driving member.

[0007] In the above technical solution, the weight has a neck with a diameter smaller than the diameter of the weight body, and a magnetic part is embedded on the top surface of the weight neck. Correspondingly, the second contact portion is a contact portion that can be magnetized or has magnetism, and the first contact portion is a contact portion that cannot be magnetized; the locking portion is a hole with an inner diameter between the diameter of the weight neck and the diameter of the weight body.

[0008] In the above technical solution, the first contact portion is a non-magnetizable contact piece, the second contact portion is a suction cup, the top surface of the weight body has a plane for the suction cup to adsorb, and the locking portion is a hole with an inner diameter between the suction cup diameter and the weight body diameter.

[0009] In the above technical solution, the testing device includes a shell, in which at least two layers of sensing components are arranged, the shell includes at least one positioning plate, the positioning plate is provided with at least two positioning grooves with a height difference between each other, and the fixed end of the force sensor is provided with a positioning block installed in the positioning groove.

[0010] In the above technical solution, a pre-positioning structure, a vertical adjustment structure and a horizontal adjustment structure are provided between the positioning slot and the positioning block. The positioning block is movably arranged in the positioning slot through the pre-positioning structure, and the position of the positioning block in the vertical and horizontal directions in the positioning slot is adjusted respectively by the vertical adjustment structure and the horizontal adjustment structure.

[0011] In the above technical scheme, the pre-positioning structure is composed of a first positioning hole arranged on the positioning block, a second positioning hole arranged on the upper and lower side walls of the positioning groove, and a latch, the latch is engaged with the second positioning hole, the latch is passed through the first positioning hole and is loosely matched with the first positioning hole; the vertical adjustment structure is composed of a first fixing hole arranged on the positioning block, an oblong hole arranged on the outer side wall of the positioning groove, and a first fastener, the first fastener is passed through the oblong hole and is threadedly connected to the first fixing hole; the horizontal adjustment structure is composed of a second fixing hole arranged on the positioning block, a through hole arranged on the upper and lower side walls of the positioning groove, and a second fastener, the second fastener is passed through the through hole and is threadedly connected to the second fixing hole; after the positioning block is adjusted to determine the position in the positioning groove along with the force sensor, the first fastener and the second fastener are respectively tightened and fixed to the corresponding side walls of the positioning groove.

[0012] In the above technical solution, the moving mechanism includes a horizontal screw nut assembly, a vertical screw nut assembly and a lifting seat, the testing device is arranged on the lifting seat, the lifting seat is arranged on the vertical screw nut assembly, the vertical screw nut assembly is arranged on the horizontal screw nut assembly, and the horizontal screw nut assembly is arranged on the gantry of the machine.

[0013] In the above technical solution, the machine is provided with a suction component for sucking defective materials, and the suction component includes a linear movable track, a movable seat, a lifting cylinder and a suction nozzle connected to a negative pressure air source. The linear movable track is arranged on the gantry and is located on the other side opposite to the horizontal screw nut, the movable seat is arranged on the linear movable track, the lifting cylinder is arranged on the movable seat, and the suction nozzle is arranged at the driving end of the lifting cylinder.

[0014] To achieve the above object, the present invention provides a technical solution: a spot inspection method of the above elastic testing machine, comprising the following steps:

[0015] Step 1: Unlock the weight, and drive the movable sheet to move by the driving member, so that the locking portion of the movable sheet moves away from the direction in which the weight is separated from the storage cavity;

[0016] Step 2: The test device is reset through the moving mechanism, and the data of each force sensor when no-load is collected, and the collection time is 1S;

[0017] Step 3: suck up the weight, the test device quickly moves to the pre-check position above the storage bin through the moving mechanism, then slowly descends vertically so that the second contact part of the force sensor sucks the weight, and then lifts the weight vertically until it is completely out of the storage cavity;

[0018] Step 5: Stop the test device for 3 seconds to allow the weight to gradually stop shaking and collect data from each force sensor for 1 second.

[0019] Step 6: The testing device vertically lowers the weight into the storage cavity, and uses the driving member to move the locking portion of the movable sheet to the direction in which the weight is separated from the storage cavity, thereby locking the weight;

[0020] Step seven: the test device is lifted vertically to separate the second contact portion of the force sensor from the weight, and the test device is reset through the moving mechanism to complete the spot inspection.

[0021] The beneficial effects of the present invention are that the present invention has a reasonable structure, a novel design and strong practicality. The first contact part that cannot be magnetized and the second contact part that can be magnetized or has magnetism on the probe are used to separate the inspection and the test, so that the test device can test multiple spring pins at the same time. At the same time, the second contact part of each probe quickly hangs the weights for inspection through magnetism, and multiple force sensors are divided into upper and lower layers, which greatly improves the distribution density of the first contact part. It is very suitable for batch elastic force testing of small components such as spring pins. All force sensors on the machine are inspected at one time, eliminating the complicated manual hanging of weights and manual confirmation of data. Elastic force tests can be performed on multiple spring pins at a time, and inspection and testing are taken into account at the same time, thereby improving the efficiency and accuracy of the spring pin elastic force test; multiple weights can be stably stored on the machine platform of the elastic tester through the warehouse body, and the weights are locked and unlocked by the movable sheet. In the locked state, regardless of whether the weights are subjected to external force, the weights can be stably retained in the storage cavity, and in the unlocked state, the weights can be lifted and separated from the storage cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention.

[0023] Figure 2 is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention ( Figure 1 another viewing direction).

[0024] Figure 3 It is a structural diagram of the storage bin locked state.

[0025] Figure 4 It is a structural diagram of the storage bin unlocked state.

[0026] Figure 5 It is a schematic diagram of the cross-sectional structure of the storage bin in a locked state.

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the weight in the first embodiment.

[0028] Figure 7 It is a schematic diagram of the three-dimensional structure of the weight of the second embodiment.

[0029] Figure 8 It is a schematic diagram of the internal structure of the test device.

[0030] Fig. 9 It is a partial structural diagram of the test device.

[0031] Fig.10 Figure 1 is a schematic diagram of the exploded structure of the sensing component.

[0032] Fig.11 It is a schematic diagram of the three-dimensional structure of the positioning plate.

[0033] Fig.12 It is a schematic diagram of the structure of the magnetic weight during the inspection of the test device.

[0034] Fig.13 It is a schematic diagram of the structure in which the test device is moved above the tray.

[0035] In the figure: 1, machine; 2, storage bin; 21, main body; 211, storage cavity; 212, limiting block; 22, bottom plate; 23, positioning seat; 24, movable sheet; 241, locking part; 242, avoidance hole; 243, connecting end; 244, adsorption plane; 25, weight; 251, main body; 252, neck; 253, magnetic part; 26, driving part; 27, cushion block; 3, testing device; 31, positioning plate; 311, positioning groove; 312, second positioning hole; 313, through hole; 314, oblong hole; 32, sensing component; 321, force sensor; 322, probe; 323, first contact portion; 324, second contact portion; 325, positioning block; 326, first positioning hole; 327, second fixing hole; 33, baffle; 34, connecting plate; 41, horizontal screw nut assembly; 42, vertical screw nut assembly; 43, lifting seat; 51, suction nozzle; 52, moving seat; 53, linear moving track; 6, test bench; 61, tray; 62, screw transmission module. DETAILED DESCRIPTION

[0036] Specific embodiments of the present invention will be described with reference to the accompanying drawings.

[0037] Embodiment 1,

[0038] like Figure 1-6 As shown in 8-13, an elastic force testing machine includes a machine platform 1 and a test platform 6, a storage bin 2, a test device 3, and a moving mechanism arranged on the machine platform 1. The test platform 6 is used to place materials for elastic force testing, and the materials are spring needles. The elastic force test is moved between the storage bin 2 and the test platform 6 by the driving of the moving mechanism; the test device 3 includes a plurality of sensing components 32 distributed in a matrix, and the sensing component 32 includes a force sensor 321 and a probe 322. The probe 322 is arranged at the sensing end of the force sensor 321. The storage bin 2 is provided with a plurality of weights 25 for spot checking each force sensor 321. The probe 322 has a first contact portion 323 for contacting with a spring needle during elastic force testing, and a second contact portion 324 for contacting with the weight 25 and lifting the weight 25 out of the storage bin 2 during spot checking. The contact points of the first contact portion 323 of each force sensor 321 are all located on the same plane. The contact points of the first contact portion 323 are used for contacting with the spring needle, and the contact points of the second contact portion 324 are used for contacting with the spot checking weight 25.

[0039] The storage bin 2 includes a bin body, a movable sheet 24, and a driving member 26; 20 weights 25 are placed in the bin body, so that 20 probes 322 on the elastic testing machine platform 1 can be inspected at one time, which is particularly suitable for the inspection operation of multiple probes 322, greatly improving the efficiency of the inspection. The movable sheet 24 is movably arranged on the bin body through the driving member 26, and the bin body is provided with multiple storage cavities 211 for placing the weights 25 along the thickness direction. The movable sheet 24 is provided with a locking portion 241 for locking and unlocking the weights 25 in the storage cavity 211. In the locked state, the locking portion 241 is located in the direction in which the weight 25 is separated from the storage cavity 211 to prevent the weight 25 from separating from the storage cavity 211; in the unlocked state, the locking portion 241 is not in the direction in which the weight 25 is separated from the storage cavity 211, and the movable sheet 24 switches between the locked state and the unlocked state through the driving member 26.

[0040] The bin body includes a main body 21 and a bottom plate 22, the main body 21 is fixed on the bottom plate 22, and a storage cavity 211 is arranged between the main body 21 and the bottom plate 22; the driving member 26 is arranged on the bottom plate 22 through a cushion block 27. The movable sheet 24 is movably arranged on the top surface of the main body 21, and a limiting block 212 is arranged on the top surface of the main body 21 to limit the movement of the movable sheet 24. The locking portion 241 of the movable sheet 24 is located at the opening of the storage cavity 211. One side edge of the movable sheet 24 is bent to form a connecting end 243, and the connecting end 243 is connected to the driving end of the driving member 26.

[0041] The weight 25 has a neck 252 whose diameter is smaller than the diameter of the weight 25 body 251. The top surface of the neck 252 of the weight 25 is embedded with a magnetic member 253. The corresponding second contact portion 324 is a contact member that can be magnetized or has magnetism, and the first contact portion 323 is a contact member that cannot be magnetized. The locking portion 241 is a hole whose inner diameter is between the diameter of the neck 252 of the weight 25 and the diameter of the weight 25 body 251. The magnetic member 253 is a cylindrical magnet, and the magnetic member 253 is used to quickly connect magnetically with the second contact portion 324, so that the test device 3 can quickly magnetically attract the weight 25 for spot inspection.

[0042] There are iron parts in the spring pin, and the first contact part 323 must be guaranteed not to be magnetized, so as to avoid the first contact part 323 magnetically attracting the spring pin when the spring force of the spring pin is tested. Multiple spring pins are placed on the tray 61 in a matrix distribution manner, and the tray 61 is detachably arranged on the test table 6 of the machine 1. The first contact part 323 and the second contact part 324 are both columnar contact parts.

[0043] In the locked state, the neck 252 of the weight 25 is located in the locking portion 241. When the weight 25 is subjected to an external force that causes it to detach, the end surface where the weight 25 body 251 and the neck 252 of the weight 25 are connected will abut against one side of the locking portion 241, so that the weight 25 is blocked by the movable sheet 24, thereby causing the weight 25 to remain in the storage cavity 211 and remain locked.

[0044] One side of the locking portion 241 is connected to a position-avoiding hole 242, and the inner diameter of the position-avoiding hole 242 is larger than the diameter of the body 251 of the weight 25. When the movable piece 24 is acted upon by the driving member 26, the locking portion 241 moves away from above the weight 25 and enters an unlocked state, and the position-avoiding hole 242 moves above the weight 25, and the position-avoiding hole 242 does not interfere with the weight 25, so that the weight 25 can be taken out of the storage cavity 211 under the action of an external force.

[0045] The bin body is mounted on the machine platform 1 via a positioning seat 23 , and the positioning seat 23 is fixedly connected to the bottom plate 22 .

[0046] The testing device 3 includes a shell, and two layers of sensing components 32 are arranged in the shell. The shell includes two positioning plates 31, two baffles 33 and a connecting plate 34. The positioning plate 31 is provided with two positioning grooves 311 with a height difference between each other, and the fixed end of the force sensor 321 is provided with a positioning block 325 installed in the positioning groove 311. Five force sensors 321 are arranged in one positioning groove 311, and there are four rows of twenty force sensors 321 in the shell, and the twenty force sensors 321 are divided into two layers. The two positioning plates 31 and the two baffles 33 are fixedly mounted below the connecting plate 34 by bolts, and the connecting plate 34 is connected to the lifting seat 43.

[0047] The height of the contact point of the first contact portion 323 is lower than the height of the contact point of the second contact portion 324. The first contact portion 323 of the probe 322 of the upper force sensor 321 is longer than the first contact portion 323 of the probe 322 of the lower force sensor 321, and the second contact portion 324 of the probe 322 of the upper force sensor 321 is longer than the second contact portion 324 of the probe 322 of the lower force sensor 321.

[0048] There are pre-positioning structures, vertical adjustment structures and horizontal adjustment structures between the positioning slot 311 and the positioning block 325. The positioning block 325 is movably arranged in the positioning slot 311 through the pre-positioning structure, and the position of the positioning block 325 in the vertical direction and the horizontal direction in the positioning slot 311 is adjusted respectively by the vertical adjustment structure and the horizontal adjustment structure.

[0049] The pre-positioning structure is composed of a first positioning hole 326 arranged on the positioning block 325, a second positioning hole 312 arranged on the upper and lower side walls of the positioning groove 311, and a latch, the latch is engaged with the second positioning hole 312, the latch is passed through the first positioning hole 326 and is clearance-matched with the first positioning hole 326; the vertical adjustment structure is composed of a first fixing hole arranged on the positioning block 325, an oblong hole 314 arranged on the outer side wall of the positioning groove 311, and a first fastener, the first fastener is passed through the oblong hole 314 and is threadedly connected to the first fixing hole; the horizontal adjustment structure is composed of a second fixing hole 327 arranged on the positioning block 325, a through hole 313 arranged on the upper and lower side walls of the positioning groove 311, and a second fastener, the second fastener is passed through the through hole 313 and is threadedly connected to the second fixing hole 327; after the positioning block 325 is adjusted to determine the position in the positioning groove 311 with the force sensor 321, the first fastener and the second fastener are respectively tightened and fixed to the corresponding side walls of the positioning groove 311. The first fastener and the second fastener are both screws.

[0050] The moving mechanism includes a horizontal screw nut assembly 41, a vertical screw nut assembly 42 and a lifting seat 43. The testing device 3 is arranged on the lifting seat 43, the lifting seat 43 is arranged on the vertical screw nut assembly 42, the vertical screw nut assembly 42 is arranged on the horizontal screw nut assembly 41, and the horizontal screw nut assembly 41 is arranged on the gantry of the machine platform 1.

[0051] The installation of multiple force sensors 321 is more difficult because it is necessary to ensure that the contact points of the first contact parts 323 of the probes 322 of the multiple force sensors 321 must be kept in the same plane. For this reason, the positioning groove 311 is designed as a C-shaped positioning groove 311, which can facilitate the installation of the force sensor 321 and ensure the stability of the installation of the force sensor 321. The direction of the oblong hole 314 is set in the vertical direction, so that the position of the positioning block 325 in the vertical direction can be adjusted through the oblong hole 314. The aperture of the through hole 313 is larger than the outer diameter of the threaded end of the second fastener, so that the positioning block 325 can be adjusted in the horizontal direction. The aperture of the first positioning hole 326 on the positioning block 325 is larger than the outer diameter of the pin, so that the positioning block 325 can move up, down, left and right.

[0052] The leveling steps of the first contact part 323 of the probe 322 of the multiple force sensors 321 are as follows: firstly, the probe 322 is installed on the sensing end of the force sensor 321, and the positioning block 325 is fixed on the fixed end, and the positioning block 325 is placed in the positioning groove 311, and two latches are passed through the second positioning hole 312 at the top, the first positioning hole 326, and the second positioning hole 312 at the bottom in sequence, and the first fastener is passed through the oblong hole 314 and then screwed into the first fixing hole, and the second fastener is passed through the through hole 313 and then screwed into the second fixing hole 327, and the first fastener and the second fastener do not need to be tightened. At this time, the moving range of the positioning block 325 is limited by the oblong hole 314 and the through hole 313, and the positioning block 325 and the force sensor 321 are completely pre-positioned. When the twenty force sensors 321 in the housing are all pre-positioned. Install the shell together with multiple force sensors 321 on the lifting base 43, control the lifting base 43, drive the shell and multiple force sensors 321 to move to a standard plane, so that the contact points of the first contact parts 323 all contact the standard plane, and then tighten all the first fasteners and the second fasteners to fix all the force sensors 321 and ensure that the first contact parts 323 of all the force sensors 321 are located on the same plane.

[0053] The machine 1 is provided with a suction component for sucking defective products of the spring pin elastic force test. The suction component includes a linear moving track 53, a moving seat 52, a lifting cylinder and a suction nozzle 51 connected to a negative pressure air source. The linear moving track 53 is arranged on the gantry and is located on the other side opposite to the horizontal screw nut. The moving seat 52 is arranged on the linear moving track 53, the lifting cylinder is arranged on the moving seat 52, and the suction nozzle 51 is arranged at the driving end of the lifting cylinder. After the test device 3 has tested all the spring pins on the test bench 6, when the elastic force and elastic force curve of the spring pin do not meet the standard, the suction component will work to suck away the corresponding defective spring pins through negative pressure.

[0054] Two test tables 6 are arranged on the machine 1 . The test tables 6 are moved by a screw drive module 62 . A tray 61 is clamped on the test table 6 . The tray 61 is provided with a plurality of fine holes for placing spring pins.

[0055] In the specific use process, the weight 25 is usually placed in the storage cavity 211, and the locking portion 241 of the movable sheet 24 locks the weight 25, and a part of the weight 25 is covered by the locking portion 241, which not only locks the weight 25 but also protects the weight 25; when the elastic force testing machine needs to be inspected (generally, an inspection is performed once a day at the beginning and end of work), the movable sheet 24, under the action of the driving member 26, moves the locking portion 241 away to release the lock and enter the unlocked state, and the test platform 1 of the elastic force testing machine moves to the top of the warehouse body, and the second contact portion 324 of the probe 322 of the force sensor 321 is in contact with the neck of the weight 25. 252 contacts, under the action of magnetism, the weight 25 is magnetically attracted under the probe 322, and the weight 25 is lifted to completely detach from the warehouse body, so that the weight 25 only contacts with the probe 322, so that the probe 322 of the force sensor 321 is inspected to detect the accuracy of the force sensor 321, and then the weight 25 is sent back to the storage cavity 211, and the movable sheet 24 under the action of the driving member 26 moves the locking portion 241 to the neck 252 of the weight 25 to lock the weight 25, and then the testing device 3 moves up to disconnect the probe 322 and the weight 25, and the weight 25 can only stay in the storage cavity 211 under the blocking and locking of the movable sheet 24.

[0056] Embodiment 2:

[0057] like Figure 7 As shown, the difference from the first embodiment is that the second contact portion 324 is a suction cup, the top surface of the weight 25 body 251 has a plane 244 for the suction cup to adsorb, and the locking portion 241 is a hole with an inner diameter between the suction cup diameter and the diameter of the weight 25 body 251; the first contact portion 323 is also a contact piece that cannot be magnetized; the weight 25 is sucked up by a suction cup.

[0058] A method for inspecting the elastic force testing machine comprises the following steps:

[0059] Step 1: Unlock the weight 25, and drive the movable piece 24 to move by the driving member 26, so that the locking portion 241 of the movable piece 24 moves away from the direction in which the weight 25 is separated from the storage cavity 211;

[0060] Step 2: The testing device 3 is reset by the moving mechanism, and the data of each force sensor 321 is collected when it is unloaded, and the collection time is 1 second;

[0061] Step 3: suck the weight 25, the testing device 3 quickly moves to the pre-check position above the storage bin 2 through the moving mechanism, and then slowly descends vertically to make the second contact portion 324 of the force sensor 321 suck the weight 25, and then lifts the weight 25 vertically until it is completely out of the storage cavity 211;

[0062] Step 5: the testing device 3 stops for 3 seconds, so that the weight 25 gradually stops shaking and stops, and the data of each force sensor 321 is collected, and the collection time is 1 second;

[0063] Step 6: The testing device 3 vertically lowers the weight 25 into the storage cavity 211, and uses the driving member 26 to move the locking portion 241 of the movable piece 24 to the direction in which the weight 25 is separated from the storage cavity 211, thereby locking the weight 25;

[0064] Step seven: the testing device 3 is vertically raised to separate the second contact portion 324 of the force sensor 321 from the weight 25 , and the testing device 3 is reset through the moving mechanism to complete the spot inspection.

[0065] The above-mentioned force sensor 321 refers to a cantilever beam type force sensor 321 .

[0066] Among them, the inspection data can be obtained by subtracting the no-load data collected in step 2 from the data collected by each force sensor 321 in step 5. The inspection data is compared with the preset standard value of machine 1. The normal accuracy of the force sensor 321 requires that the difference between the inspection data and the standard value is within 1g. If the difference exceeds 1g, it means that the accuracy of the force sensor 321 is abnormal and the force sensor 321 needs to be replaced or repaired.

[0067] The present invention has reasonable structure, novel design and strong practicality. The first contact part 323 that cannot be magnetized and the second contact part 324 that can be magnetized or has magnetism on the probe 322 are used to separate the inspection and the test, so that the test device 3 can test multiple spring pins at the same time. At the same time, the second contact part 324 of each probe 322 quickly suspends the weight 25 for inspection through magnetism, and divides the multiple force sensors 321 into two layers, which greatly improves the distribution density of the first contact part 323. It is very suitable for batch elastic force testing of small components such as spring pins, and takes into account both inspection and testing, thereby improving the efficiency and accuracy of the spring pin elastic force testing. The multiple weights 25 can be stably stored on the machine table 1 of the elastic force testing machine through the warehouse body, and the weights 25 are locked and unlocked by the movable sheet 24. In the locked state, regardless of whether the weights 25 are subjected to external force, the weights 25 can be stably retained in the storage cavity 211. In the unlocked state, the weights 25 can be lifted and separated from the storage cavity 211.

[0068] The above does not limit the technical scope of the present invention in any way. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An elastic force testing machine, characterized in that: The invention comprises a machine platform and a test platform, a storage bin, a test device and a moving mechanism arranged on the machine platform. The test platform is provided with materials for elastic force testing. The test device is moved between the storage bin and the test platform by the driving of the moving mechanism. The test device comprises a plurality of sensing components distributed in a matrix. The sensing components comprise a force sensor and a probe. The probe is arranged at the sensing end of the force sensor. The storage bin is provided with a plurality of weights for spot checking each force sensor. The probe has a first contact portion for contacting with the material during elastic force testing and a second contact portion for contacting with the weight and lifting the weight out of the storage bin during spot checking. The storage bin comprises a bin body, a movable sheet and a driving member. The movable sheet is movably arranged on the bin body by the driving member. The bin body is provided with a plurality of storage cavities for placing weights along the thickness direction. The movable sheet is provided with a locking portion for locking and unlocking the weights in the storage cavity. In the locked state, the locking portion is located in the direction in which the weights are separated from the storage cavity to prevent the weights from separating from the storage cavity. In the unlocked state, the locking portion is not in the direction where the weight is separated from the storage cavity, and the movable sheet is switched between the locked state and the unlocked state by the driving member; The testing device comprises a shell, at least two layers of sensing components are arranged in the shell, the shell comprises at least one positioning plate, the positioning plate is provided with at least two positioning grooves with a height difference between each other, and the fixed end of the force sensor is provided with a positioning block installed in the positioning groove; a pre-positioning structure, a vertical adjustment structure and a horizontal adjustment structure are provided between the positioning groove and the positioning block, the positioning block is movably arranged in the positioning groove through the pre-positioning structure, and the position of the positioning block in the vertical direction and the horizontal direction in the positioning groove is adjusted respectively by the vertical adjustment structure and the horizontal adjustment structure; the pre-positioning structure is composed of a first positioning hole arranged on the positioning block, a second positioning hole arranged on the upper and lower side walls of the positioning groove, and a latch. The latch is engaged with the second positioning hole, the latch is inserted into the first positioning hole and is loosely matched with the first positioning hole; the vertical adjustment structure is composed of a first fixing hole arranged on the positioning block, an oblong hole arranged on the outer wall of the positioning groove, and a first fastener, the first fastener is inserted into the oblong hole and is threadedly connected to the first fixing hole; the horizontal adjustment structure is composed of a second fixing hole arranged on the positioning block, a through hole arranged on the upper and lower side walls of the positioning groove, and a second fastener, the second fastener is inserted into the through hole and is threadedly connected to the second fixing hole; after the positioning block is adjusted to determine the position in the positioning groove with the force sensor, the first fastener and the second fastener are respectively screwed and fixed to the corresponding side walls of the positioning groove.

2. The elastic force testing machine according to claim 1, characterized in that: The weight has a neck with a diameter smaller than the diameter of the weight body, and a magnetic part is embedded in the top surface of the weight neck. Correspondingly, the second contact part is a contact part that can be magnetized or has magnetism, and the first contact part is a contact part that cannot be magnetized; the locking part is a hole with an inner diameter between the diameter of the weight neck and the diameter of the weight body.

3. The elastic force testing machine according to claim 1, characterized in that: The first contact portion is a contact piece that cannot be magnetized, the second contact portion is a suction cup, the top surface of the weight body has a plane for the suction cup to adsorb, and the locking portion is a hole with an inner diameter between the suction cup diameter and the weight body diameter.

4. The elastic force testing machine according to claim 1, characterized in that: The moving mechanism includes a horizontal screw nut assembly, a vertical screw nut assembly and a lifting seat, the testing device is arranged on the lifting seat, the lifting seat is arranged on the vertical screw nut assembly, the vertical screw nut assembly is arranged on the horizontal screw nut assembly, and the horizontal screw nut assembly is arranged on the gantry of the machine.

5. The elastic force testing machine according to claim 4, characterized in that: The machine is provided with a suction component for sucking defective materials, and the suction component includes a linear movable track, a movable seat, a lifting cylinder and a suction nozzle connected to a negative pressure air source. The linear movable track is arranged on the gantry and is located on the other side opposite to the horizontal screw nut, the movable seat is arranged on the linear movable track, the lifting cylinder is arranged on the movable seat, and the suction nozzle is arranged at the driving end of the lifting cylinder.

6. A method for inspecting an elastic force testing machine according to any one of claims 1 to 5, characterized in that: The following steps are included: Step 1: Unlock the weight, and drive the movable sheet to move by the driving member, so that the locking portion of the movable sheet moves away from the direction in which the weight is separated from the storage cavity; Step 2: The test device is reset through the moving mechanism, and the data of each force sensor when no-load is collected, and the collection time is 1S; Step 3: suck up the weight, the test device quickly moves to the pre-check position above the storage bin through the moving mechanism, then slowly descends vertically so that the second contact part of the force sensor sucks the weight, and then lifts the weight vertically until it is completely out of the storage cavity; Step 5: Stop the test device for 3 seconds to allow the weight to gradually stop shaking and collect data from each force sensor for 1 second. Step 6: The testing device vertically lowers the weight into the storage cavity, and uses the driving member to move the locking portion of the movable sheet to the direction in which the weight is separated from the storage cavity, thereby locking the weight; Step seven: the test device is lifted vertically to separate the second contact portion of the force sensor from the weight, and the test device is reset through the moving mechanism to complete the spot inspection.

Images