Full-automatic spring plunger height and torsion detection equipment and detection method

Abstract

The invention discloses a full-automatic spring plunger height and torsion detection device and method, and the device comprises an automatic feeding positioning mechanism which is provided with a spring plunger positioning groove; the automatic detection mechanism comprises a lower die assembly, a pressure sensor and a servo lifting driving unit; a detection positioning groove with an opening in the upper end is formed in the lower die assembly; the servo lifting driving unit drives the pressure sensor to move downwards to a first height, the pressure sensor makes contact with the floating head of the spring plunger, the height size is calculated, then the servo lifting driving unit drives the pressure sensor to move downwards continuously to a second height, and the height size is calculated. The torsion of the spring is tested through the counter-acting force of the spring in the spring plunger to the pressure sensor, the torsion data is automatically recorded, and qualified products and defective products are judged; and the automatic carrying mechanism is used for automatically transferring the spring plungers into the detection positioning grooves, and discharging the detected spring plungers to a corresponding qualified product area and a defective product area according to a qualified product area and a defective product area.

Description

Technical Field

[0001] The invention relates to the field of spring column detection technology, in particular to a fully automatic spring plunger height and torque detection device and a detection method. Background Art

[0002] Spring plungers are also called positioning beads, spring wave beads, bump beads, ball head plungers, etc. They are widely used in various industries for positioning. They are widely used in electronic products, sporting goods, furniture accessories, lamp accessories, tools and equipment, mold fixtures, sliding positioning components, rotating positioning components and other products. The spring plunger consists of a main housing, a compression spring, a sphere or a step cylinder, etc. The compression spring is arranged in the main housing, and the sphere or step cylinder is pressed on the top of the compression spring, and the top of the peripheral side wall is riveted inward so that the sphere or step cylinder is limited in the main housing, and can move downward when pressed downward. After reducing or releasing the pressure, it will reset under the upward elastic force of the compression spring. When testing the size (referring to the deformation height size) and spring strength of the spring plunger, the existing testing method is: manually measuring the size with a caliper or micrometer, and using a semi-automatic pressure testing instrument to test the spring strength. The loading method during testing is manual, that is, manually taking the spring plunger for size measurement, and manually taking the spring plunger and placing it on the semi-automatic pressure testing instrument for spring strength testing. This is inefficient, and manual labor is prone to fatigue. Moreover, due to human errors, the accuracy and yield of manual testing are difficult to guarantee. In addition, when using a semi-automatic pressure testing instrument, different fixing fixtures are required for spring plungers of different sizes, which requires the replacement of the fixing fixture.

[0003] Therefore, it is necessary to study a new technical solution to solve the above problems. Summary of the invention

[0004] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide a fully automatic spring plunger height and torque detection device and detection method. Through the setting of an automatic loading and positioning mechanism, an automatic detection mechanism and an automatic conveying mechanism, it realizes automatic detection of the spring plunger height and torque on the automatic detection mechanism, as well as automatic loading and unloading, saving labor and effectively improving detection efficiency, detection accuracy and stability.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: A fully automatic spring plunger height and torque detection device, comprising: An automatic feeding positioning mechanism, which has a spring plunger positioning groove, so that the spring plunger is vertically arranged in the spring plunger positioning groove; The automatic detection mechanism includes a lower mold assembly, a pressure sensor and a servo lifting drive unit; the lower mold assembly is provided with a detection positioning groove with an open upper end, the pressure sensor is located above the detection positioning groove, and the servo lifting drive unit drives the pressure sensor to move up and down; when the servo lifting drive unit drives the pressure sensor to move downward to a first height, the pressure sensor contacts the floating head of the spring plunger and converts the height dimension; when the servo lifting drive unit drives the pressure sensor to continue to move downward to a second height, the spring reaction force inside the spring plunger is used to the pressure sensor to test the spring torque, and at the same time, the torque data is automatically recorded to judge qualified products and defective products; The automatic transport mechanism automatically transfers the spring plunger on the spring plunger positioning groove to the detection positioning groove, and separates the spring plungers after the detection into the corresponding qualified product area and the defective product area according to the qualified product and the defective product.

[0006] As a preferred embodiment, the automatic feeding and positioning mechanism includes a linear feeding track, a positioning turntable and a lifting drive assembly; the spring plunger positioning grooves are provided in plurality and are respectively arranged on the periphery of the positioning turntable, the positioning turntable is controlled by a rotation drive unit to rotate horizontally, and the output end of the linear feeding track corresponds to the spring plunger positioning groove; and the lifting drive assembly is arranged below the positioning turntable to lift the spring plunger in the spring plunger positioning groove upward and protrude above the positioning turntable.

[0007] As a preferred embodiment, the jacking drive assembly includes a jacking cylinder and a push column driven up and down by the jacking cylinder. The spring plunger positioning groove passes through the upper and lower end surfaces of the positioning turntable. When the push column pushes the spring plunger upward, it will extend upward into the spring plunger positioning groove.

[0008] As a preferred solution, the second height is set and adjusted by a control system.

[0009] As a preferred embodiment, the torque data automatically recorded by the control system, as well as the data for determining qualified products and defective products, form a test history record table. The test history record table can be presented on a display screen connected to the control system, and / or the test history record table can be sent remotely or exported by a data interface.

[0010] As a preferred solution, the automatic handling mechanism includes a left and right lateral movement drive unit, a first automatic gripper unit and a second automatic gripper unit; the automatic loading and positioning mechanism is located on the left side of the automatic detection mechanism, and the qualified product area and the defective product area are located on the right side of the automatic detection mechanism; the left and right lateral movement drive unit drives the first automatic gripper unit and the second automatic gripper unit to translate left and right together, so that the first automatic gripper unit transfers the spring plunger on the spring plunger positioning groove to the detection positioning groove, and the second automatic gripper unit unloads the spring column after detection into the corresponding qualified product area and defective product area according to qualified products and defective products.

[0011] As a preferred solution, the first automatic gripper unit and the second automatic gripper unit both include a gripper assembly that automatically opens and closes left and right, a front-to-back longitudinal movement drive assembly, and an up-and-down lifting drive assembly. The front-to-back longitudinal movement drive assembly drives the gripper assembly to move longitudinally forward and backward, and the up-and-down lifting drive assembly drives the gripper assembly to lift and lower.

[0012] As a preferred solution, the up and down lifting drive assembly drives the front and rear longitudinal movement drive assembly and the clamping jaw assembly to lift up and down together. A detection method, which uses any of the above-mentioned fully automatic spring plunger height and torque detection equipment for detection, comprises the following steps: Step 1: vertically set the spring plunger in the plunger positioning groove of the automatic feeding positioning mechanism with the floating head facing upwards; Step 2: The automatic transport mechanism automatically transfers the spring plunger on the spring plunger positioning groove to the detection positioning groove; Step 3: The servo lifting drive unit drives the pressure sensor to move downward to the first height. The pressure sensor contacts the floating head of the spring plunger and stops descending. The height dimension is converted. Then, the servo lifting drive unit drives the pressure sensor to continue to move downward to the second height. The spring reaction force inside the spring plunger is transmitted to the pressure sensor to test the spring torque. At the same time, the control system automatically records the torque data to determine qualified products and defective products. Step 4: The automatic handling mechanism automatically sorts the spring plungers after the inspection into qualified products and defective products and unloads them into the corresponding qualified product area and defective product area.

[0013] As a preferred embodiment, the spring plunger includes a main shell, a compression spring, and a floating head. The compression spring is arranged in the main shell, the lower end of the floating head is pressed on the top of the compression spring, the upper end of the floating head protrudes outside the upper end of the main shell, and a flange is formed on the periphery of the upper end of the main shell, and the flange extends outwardly beyond the outer peripheral side of the main shell; when the spring plunger is placed in the detection positioning groove, the flange rests on the lower mold assembly.

[0014] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that it mainly realizes automatic detection of spring plunger height and torque on the automatic detection mechanism and automatic loading and unloading through the setting of automatic feeding and positioning mechanism, automatic detection mechanism and automatic conveying mechanism, thus saving labor and effectively improving detection efficiency, detection accuracy and stability.

[0015] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional diagram of a fully automatic spring plunger height and torque detection device according to an embodiment of the present invention; Figure 2 is another three-dimensional diagram of the fully automatic spring plunger height and torque detection device according to an embodiment of the present invention (the upper frame is not shown); Figure 3 It is another three-dimensional diagram of the fully automatic spring plunger height and torque detection device according to an embodiment of the present invention (the upper frame and the lower frame are not shown); Figure 4 yes Figure 3 Middle K-direction view; Figure 5 yes Figure 3 Cross-section at AA; Figure 6 yes Figure 2 A partial enlarged view of point B in the middle; Figure 7 It is a three-dimensional diagram of the automatic loading and positioning mechanism, the lower mold assembly, the automatic transport mechanism, and the qualified product area and the defective product area of ​​the embodiment of the present invention; Figure 8 yes Figure 7 Middle M-direction view; Fig. 9 It is another three-dimensional diagram of the automatic loading and positioning mechanism, the lower mold assembly, the automatic transport mechanism, and the qualified product area and the defective product area of ​​the embodiment of the present invention; Fig.10 It is a partial three-dimensional diagram of the automatic loading and positioning mechanism of the embodiment of the present invention; Fig.11 is a side view of an automatic transport mechanism according to an embodiment of the present invention; Fig.12 It is a cross-sectional view of a spring plunger at minimum load; Fig.13 It is a cross-sectional view of a spring plunger at maximum load; Fig.14It is a control connection block diagram of a fully automatic spring plunger height and torque detection device according to an embodiment of the present invention; Fig.15 It is a step diagram of a detection method of a fully automatic spring plunger height and torque detection device according to an embodiment of the present invention.

[0017] Description of the accompanying drawings: spring plunger 1, main housing 1a, compression spring 1b, floating head 1c, flange 1d, automatic feeding positioning mechanism 100, automatic conveying mechanism 200, automatic detection mechanism 300, qualified product area 401, defective product area 402, frame 500, lower frame 501, upper frame 502, control system 600, spring plunger positioning groove 101, linear feeding track 102, positioning turntable 103, jacking drive assembly 104, jacking cylinder 1041, jacking column 1042, adjustment Section plate 1043, longitudinal adjustment slot 1044, sensor 105, left and right lateral movement drive unit 201, first automatic clamping jaw unit 202, second automatic clamping jaw unit 203, clamping jaw assembly 21', clamping jaw cylinder 211', clamping jaw 212', front and rear longitudinal movement drive assembly 22', up and down lifting drive assembly 23', detection positioning slot 301', lower mold assembly 301, stand 302, pressure sensor 303, servo lifting drive unit 304, lower mold frame 3011, top plate 3012. DETAILED DESCRIPTION

[0018] Please refer to Figures 1 to 15 As shown, it shows the specific structure of an embodiment of the present invention.

[0019] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0020] A fully automatic spring plunger height and torque detection device comprises an automatic feeding and positioning mechanism 100, an automatic conveying mechanism 200, an automatic detection mechanism 300, a frame 500, a control system 600, a qualified product collection box and a defective product collection box.

[0021] The frame 500 includes a lower frame 501 and an upper frame 502. The automatic loading and positioning mechanism 100, the automatic detection mechanism 300, and the automatic conveying mechanism 200 are arranged on the lower frame 501. The upper frame 502 is connected to the top of the lower frame 501 to cover the automatic loading and positioning mechanism 100, the automatic conveying mechanism 200, and the automatic detection mechanism 300. The control system 600 is arranged on the upper frame 502. The control system 600 includes a PLC and a touch screen. The control system 600 is provided with a communication interface, such as a USB interface. Usually, the control system 600 is also connected to an audible and visual alarm, etc. For example, when the equipment fails or the spring plunger product is out of material, the audible and visual alarm can be used to give a prompt.

[0022] The automatic loading and positioning mechanism 100 has a spring plunger positioning groove 1011, so that the spring plunger 1 is vertically arranged in the spring plunger positioning groove 101; The automatic detection mechanism 300 includes a lower mold assembly 301, a pressure sensor 303 and a servo lifting drive unit 304; the lower mold assembly 301 is provided with a detection positioning groove 301' with an open upper end, the pressure sensor is located above the detection positioning groove 301', and the servo lifting drive unit 304 drives the pressure sensor 303 to move up and down; when the servo lifting drive unit 304 drives the pressure sensor 303 to move downward to a first height, the pressure sensor 303 contacts the floating head of the spring plunger and stops descending, and the height dimension is calculated (because the upper end surface of the detection positioning groove, that is, the height of the placement and positioning surface of the spring plunger is known and determined, the distance that the servo lifting drive unit controls the pressure sensor to move downward can be calculated, so in the control The height of the spring plunger, also referred to as the highest value of the floating head protrusion, can be easily calculated in the control system). When the servo lifting drive unit drives the pressure sensor to continue to move downward to a second height (the second height is set and adjusted by the control system), the spring reaction force inside the spring plunger is transmitted to the pressure sensor to test the spring torque. At the same time, the control system automatically records the torque data, determines qualified products and defective products, and forms a test history record table, which can be exported via USB. Preferably, the torque data automatically recorded by the control system, as well as the data for determining qualified products and defective products, form a test history record table, which can be presented on a display screen connected to the control system, and / or the test history record table can be sent remotely or exported by a data interface.

[0023] The automatic transport mechanism 200 automatically transfers the spring plunger on the spring plunger positioning groove to the detection positioning groove, and separates the spring plungers after detection into the corresponding qualified product area and defective product area (in this embodiment, specifically refers to the qualified product collection box and the defective product collection box) according to qualified products and defective products.

[0024] Specifically: The automatic loading and positioning mechanism 100 includes a linear loading track 102, a positioning turntable 103 and a lifting drive assembly 104 for sorting and outputting spring plungers; the automatic loading and positioning mechanism 100 has a spring plunger positioning groove 101, so that the spring plunger 1 is vertically arranged in the spring plunger positioning groove, and the spring plunger positioning groove 101 is provided with a plurality of and is evenly arranged around the positioning turntable 103, which is equivalent to the positioning turntable 103 having a notch around it. The spring plunger positioning groove 101 is arranged through The upper and lower ends of the positioning turntable 103 and the outer peripheral side of the positioning turntable 103 are passed through, and the positioning turntable 103 is controlled by a rotation drive unit to rotate horizontally. The output end (for example, the front end) of the linear feeding track 102 is located at the outer periphery of the positioning turntable 103 and corresponds to the spring plunger positioning groove 101; and the lifting drive assembly 104 is arranged below the positioning turntable 103 to lift the spring plunger in the spring plunger positioning groove 101 upward and protrude above the positioning turntable 103. The spring plunger is a relatively regular small object, and it is easy to arrange it in a true line output, for example, using a vibrator, similar to a screw machine feeder. When one of the spring plunger positioning grooves 101 of the positioning turntable 103 is aligned with the output end of the linear feeding track 102, a spring plunger enters the spring plunger positioning groove 101 and changes its position as the positioning turntable 103 rotates. When the next spring plunger positioning groove 101 is aligned with the output end of the linear feeding track 102, another spring plunger enters the spring plunger positioning groove 101 and changes its position as the positioning turntable 103 rotates... and so on. Accordingly, when the spring plunger on the positioning turntable 103 rotates to just above the jacking drive assembly 104, the jacking drive assembly 104 lifts the spring plunger upward and protrudes from the positioning turntable 103. The first automatic gripper unit is positioned above the disk 103 for gripping. The first automatic gripper unit moves vertically backward to the top of the spring plunger, then descends to clamp the spring plunger, then rises away from the positioning turntable 103, then moves vertically forward a short distance, and then moves horizontally to the right to the detection station, and places the spring plunger in the detection positioning groove 301' of the detection station. The lifting drive assembly 104 includes a lifting cylinder 1041 and a pushing column 1042 driven up and down by the lifting cylinder 1041. The spring plunger positioning groove 101 passes through the upper and lower end surfaces of the positioning turntable 103. When the pushing column 1042 pushes the spring plunger upward, it will extend upward into the spring plunger positioning groove 101. In this embodiment, the push column 1042 is connected to an adjustment plate 1043 , and a longitudinal adjustment groove 1044 is provided on the adjustment plate 1043 . The adjustment plate 1043 is detachably and adjustably connected to the top of the piston of the lifting cylinder 1041 through the longitudinal adjustment groove 1044 .Furthermore, sensors 105 are respectively disposed on the left and right sides of the positioning turntable 103 to detect when the clamping jaw assembly of the first automatic clamping jaw unit reaches the material picking position.

[0025] The automatic handling mechanism 200 includes a left and right lateral movement drive unit 201 (such as a linear module or a cylinder), a first automatic clamping jaw unit 202 and a second automatic clamping jaw unit 203; the first automatic clamping jaw unit 202 and the second automatic clamping jaw unit 203 both include a pair of clamping jaw assemblies 21' that automatically open and close left and right (usually two clamping jaws 212' are installed on a clamping jaw cylinder 211', and the opposite surfaces of the two clamping jaws 212' are designed with clamping arc surfaces to better match the outer peripheral surface of the spring plunger to form a reliable clamping), a front and rear longitudinal movement drive assembly 22' and an up and down lifting drive assembly 23', the front and rear longitudinal movement drive assembly 22' drives the clamping jaw assembly 21' to move longitudinally forward and backward, the up and down lifting drive assembly 23' drives the clamping jaw assembly 21' to move up and down, and the up and down lifting drive assembly 23' drives the front and rear longitudinal movement drive assembly 22' and the clamping jaw assembly 21' to move up and down together. The left and right lateral movement driving unit 201 drives the first automatic gripper unit 202 and the second automatic gripper unit 203 to move horizontally, so that the first automatic gripper unit 202 transfers the spring plunger on the spring plunger positioning slot 101 to the detection station for detection, and the second automatic gripper unit 203 removes the spring plunger that has been detected on the detection station. It should be noted that the front and rear longitudinal movement driving assembly 22' and the up and down lifting driving assembly 23' mentioned in this embodiment are driven by cylinders, and the front and rear longitudinal movement driving assembly 22' drives the lateral movement seat to move horizontally, and the first automatic gripper unit 202 and the second automatic gripper unit 203 are installed on the lateral movement seat with a left and right spacing. Specifically, the up and down lifting driving assembly 23' is installed on the lateral movement seat, and the up and down lifting driving assembly 23' drives the rear longitudinal movement driving assembly 22' to move up and down, and the front and rear longitudinal movement driving assembly 22' drives the longitudinal movement seat to move forward and backward, and the gripper cylinder 211' is installed on the longitudinal movement seat; in other embodiments, it is also possible to change the cylinder drive to a motor drive. The clamping jaw assembly 21 ′ is designed as a spring clamping jaw, which can adapt to spring plungers of different diameters.

[0026] The automatic detection mechanism 300 includes a lower mold assembly 301, a stand 302, a pressure sensor 303 (a standard pressure sensor can be used), and a servo lifting drive unit 304; the lower mold assembly 301 is arranged on the front side of the stand 302, and the lower mold assembly 301 includes a lower mold frame 3011 and a top plate 3012 connected to the lower mold frame 3011, and the detection positioning groove 301' is opened on the top plate, and the top plate is detachably connected to the lower mold frame. When the spring plunger 1 is placed in the detection positioning groove 301', the flange edge (or flange) of the spring plunger 1 rests on the top of the top plate, so that the detection positioning groove can be slightly larger than the outer diameter of the peripheral side wall of the main shell, which meets the requirements of spring plungers within a certain size range. For products with large differences in outer diameter, the detection positioning groove can also be changed by replacing the top plate 3012 of the lower mold base. The servo lifting drive unit 304 is a servo electric cylinder, which is installed on the stand 302. The pressure sensor 303 is connected to the output end of the servo electric cylinder. The servo lifting drive unit 304 drives the pressure sensor 303 to move up and down. It can also be understood that: the servo lifting drive unit drives the detection head to move up and down, and the pressure sensor is set on the detection head. Fig.12 and Fig.13 As shown, the servo lifting drive unit 304 drives the pressure sensor 303 to move downward to a first height, that is, the pressure sensor contacts the floating head of the spring plunger, stops descending, and converts the height dimension (because the upper end surface of the detection positioning groove, that is, the height of the placement positioning surface of the spring plunger is known and determined, the distance that the servo lifting drive unit controls the pressure sensor to move downward can be calculated, so it is easy to calculate the height of the spring plunger in the control system, which also refers to the highest value of the floating head protrusion), and the PLC connected to the control system automatically records the size data. Then, the servo lifting drive unit drives the pressure sensor to continue to move downward to a second height (the second height is controlled by System settings are adjusted), the second height refers to the descent to the limit position of the floating head, and the spring reaction force inside the spring plunger is transmitted to the pressure sensor to test the spring torque. At the same time, the control system (generally recorded by the PLC connected to the control system) automatically records the torque data, determines the qualified products and defective products and forms a test history record table, which can be exported via USB; preferably, the torque data automatically recorded by the control system, as well as the data for determining qualified products and defective products, all form a test history record table, which can be presented on a display screen connected to the control system, and / or the test history record table can be sent remotely or exported by a data interface.

[0027] The qualified product area 401 and the defective product area 402 are arranged on the right side of the automatic inspection mechanism. The qualified product area 401 and the defective product area 402 are arranged side by side in the longitudinal direction. After the second automatic clamping claw unit 203 removes the spring plunger that has completed the inspection on the inspection station, the front and rear longitudinal movement drive assembly drives the clamping claw assembly to move longitudinally in the front and rear direction to place the spring plunger in the qualified product area or the defective product area accordingly. The automatic loading and positioning mechanism 100, the inspection station and the qualified product area (and the defective product area) are arranged in sequence from left to right, and the automatic transport mechanism 200 is connected between the automatic loading and positioning mechanism 100, the inspection station and the qualified product area (and the defective product area).

[0028] And, provide a detection method, combined with Fig.14 and Fig.15 As shown, the detection is performed using the fully automatic spring plunger height and torque detection equipment described above, including the following steps: Step 1: vertically arrange the spring plunger 1 in the plunger positioning groove 101 of the automatic feeding positioning mechanism 100 with the floating head facing upwards; this is specifically accomplished by the automatic feeding positioning mechanism 100; Step 2, the automatic transport mechanism 200 automatically transfers the spring plunger on the spring plunger positioning groove 101 to the detection positioning groove 301'; specifically, it is completed by the automatic transport mechanism 200; Step 3, the servo lifting drive unit 304 drives the pressure sensor 303 to move downward to the first height, that is, the pressure sensor 303 contacts the floating head of the spring plunger, stops descending, and converts the height dimension. Subsequently, the servo lifting drive unit 304 drives the pressure sensor 303 to continue to move downward to the second height (i.e., the floating head pressure limit position), and the spring (such as a compression spring) inside the spring plunger reacts to the pressure sensor 303 to test the spring torque. At the same time, the control system 600 automatically records the torque data to determine qualified products and defective products; specifically, it is completed by the automatic detection mechanism; Step 4: The automatic transport mechanism automatically sorts and unloads the tested spring plungers into the corresponding qualified product area 401 and the defective product area 402 according to qualified products and defective products. This is specifically accomplished by the automatic transport mechanism.

[0029] In other embodiments, the detection of spring torque is not limited to the lowering limit position of the floating head; more than two heights can be set by the control system, for example: the first torque height and the second torque height. After the size is detected, the servo lifting drive unit drives the pressure sensor to continue to move downward to the first torque height, and the spring reaction force inside the spring plunger is sent to the pressure sensor to test the spring torque at the first torque height. At the same time, the control system automatically records the torque data of the current height, and then continues to descend to the second torque height, and the spring reaction force inside the spring plunger is sent to the pressure sensor to test the spring torque at the first torque height. At the same time, the control system automatically records the torque data of the current height. In this way, the load of the floating head at different heights can be detected. Since the pressure sensor and the servo electric cylinder are used in the present invention to realize the test height and torque size, the torque value under different heights can be tested in theory. According to the application scenario requirements of the spring plunger product, the corresponding load of the floating head under different pressure conditions can be detected as needed.

[0030] The elastic plunger 1 shown in the figure is only used as an example of a specific product shape, and is not intended to limit the spring plunger products applicable to the spring plunger positioning and automatic handling mechanism of the present invention. Usually, the spring plunger 1 (also called positioning bead, spring wave bead, bump bead, ball head plunger, etc.) includes a main housing 1a, a compression spring 1b, and a floating head 1c (generally a sphere or a stepped cylinder), the compression spring 1b is arranged in the main housing 1a, the lower end of the floating head 1c is pressed on the top of the compression spring 1b, and the upper end of the floating head 1c protrudes outside the upper end of the main housing 1a. The detection method of this embodiment is mainly applicable to spring plungers with flange edges, that is: the upper end periphery of the main housing 1a is formed with a flange 1d, and the flange 1d extends outward beyond the outer peripheral side of the main housing 1a; in this way, when the spring plunger 1 is placed in the detection positioning groove 301', the flange 1d rests on the lower mold assembly 301.

[0031] The design emphasis of the present invention is: 1. Through the setting of automatic feeding and positioning mechanism, automatic detection mechanism and automatic handling mechanism, the height and torque of the spring plunger can be automatically detected on the automatic detection mechanism, which saves labor and effectively improves the detection efficiency, detection accuracy and stability.

[0032] Second, through the structural setting of the automatic loading and positioning mechanism 100 and the automatic handling mechanism 200, the spring plunger is vertically arranged in the spring plunger positioning groove on the automatic loading and positioning mechanism 100, and the spring plunger on the spring plunger positioning groove 101 is transferred to the inspection station for inspection by the first automatic clamping jaw unit 202, and the spring plunger that has completed the inspection at the inspection station is removed by the second automatic clamping jaw unit 203, so as to realize automatic loading and unloading, and the clamping jaw automatic handling mechanism 200 can adapt to spring plungers of different sizes and diameters. 3. The pressure sensor and servo electric cylinder cooperate to realize the height dimension test and torque size test of the spring plunger. The PLC and touch screen adjust the test specifications, record the test data and realize the fully automated test of the action logic. It has a high degree of intelligence, can save manpower, and can better meet the testing needs of different products.

[0033] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight 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. A fully automatic spring plunger height and torque detection device, characterized in that: Included are: An automatic feeding positioning mechanism, which has a spring plunger positioning groove, so that the spring plunger is vertically arranged in the spring plunger positioning groove; The automatic detection mechanism includes a lower mold assembly, a pressure sensor and a servo lifting drive unit; the lower mold assembly is provided with a detection positioning groove with an open upper end, the pressure sensor is located above the detection positioning groove, and the servo lifting drive unit drives the pressure sensor to move up and down; when the servo lifting drive unit drives the pressure sensor to move downward to a first height, the pressure sensor contacts the floating head of the spring plunger and converts the height dimension; when the servo lifting drive unit drives the pressure sensor to continue to move downward to a second height, the spring reaction force inside the spring plunger is used to the pressure sensor to test the spring torque, and at the same time, the torque data is automatically recorded to judge qualified products and defective products; The automatic transport mechanism automatically transfers the spring plunger on the spring plunger positioning groove to the detection positioning groove, and separates the spring plungers after the detection into the corresponding qualified product area and the defective product area according to the qualified product and the defective product.

2. The fully automatic spring plunger height and torque detection device according to claim 1, characterized in that: The automatic feeding and positioning mechanism includes a linear feeding track, a positioning turntable and a lifting drive assembly; the spring plunger positioning grooves are provided in plurality and are respectively provided on the periphery of the positioning turntable, the positioning turntable is controlled by a rotation drive unit to rotate horizontally, and the output end of the linear feeding track corresponds to the spring plunger positioning groove; and the lifting drive assembly is provided below the positioning turntable to lift the spring plunger in the spring plunger positioning groove upward and protrude above the positioning turntable.

3. The fully automatic spring plunger height and torque detection device according to claim 2, characterized in that: The lifting drive assembly includes a lifting cylinder and a pushing column driven up and down by the lifting cylinder. The spring plunger positioning groove passes through the upper and lower end surfaces of the positioning turntable. When the pushing column pushes the spring plunger upward, it will extend upward into the spring plunger positioning groove.

4. The fully automatic spring plunger height and torque detection device according to claim 1, characterized in that: The second height is set and adjusted by a control system.

5. The fully automatic spring plunger height and torque detection device according to claim 1, characterized in that: The torque data automatically recorded by the control system, as well as the data for determining qualified products and defective products, form a test history record table. The test history record table can be presented on a display screen connected to the control system, and / or the test history record table can be sent remotely or exported by a data interface.

6. The fully automatic spring plunger height and torque detection device according to claim 1, characterized in that: The automatic handling mechanism includes a left and right lateral movement driving unit, a first automatic gripper unit and a second automatic gripper unit; the automatic loading and positioning mechanism is located on the left side of the automatic detection mechanism, and the qualified product area and the defective product area are located on the right side of the automatic detection mechanism; the left and right lateral movement driving unit drives the first automatic gripper unit and the second automatic gripper unit to translate left and right together, so that the first automatic gripper unit transfers the spring plunger on the spring plunger positioning groove to the detection positioning groove, and the second automatic gripper unit unloads the spring column after detection into the corresponding qualified product area and defective product area according to qualified products and defective products.

7. The fully automatic spring plunger height and torque detection device according to claim 6, characterized in that: The first automatic gripper unit and the second automatic gripper unit both include a gripper assembly that automatically opens and closes left and right, a front-to-back longitudinal movement drive assembly, and an up-and-down lifting drive assembly. The front-to-back longitudinal movement drive assembly drives the gripper assembly to move forward and backward longitudinally, and the up-and-down lifting drive assembly drives the gripper assembly to lift and lower.

8. The fully automatic spring plunger height and torque detection device according to claim 7, characterized in that: The up and down lifting drive assembly drives the front and rear longitudinal movement drive assembly and the clamping claw assembly to lift up and down together.

9. A detection method, characterized in that: The detection is performed using the fully automatic spring plunger height and torque detection device described in any one of claims 1 to 8, comprising the following steps: Step 1: vertically set the spring plunger in the spring plunger positioning groove of the automatic feeding positioning mechanism with the floating head facing upwards; Step 2: The automatic transport mechanism automatically transfers the spring plunger on the spring plunger positioning groove to the detection positioning groove; Step 3: The servo lifting drive unit drives the pressure sensor to move downward to the first height. The pressure sensor contacts the floating head of the spring plunger and stops descending. The height dimension is converted. Then, the servo lifting drive unit drives the pressure sensor to continue to move downward to the second height. The spring reaction force inside the spring plunger is transmitted to the pressure sensor to test the spring torque. At the same time, the control system automatically records the torque data to determine qualified products and defective products. Step 4: The automatic handling mechanism automatically sorts the spring plungers after the inspection into qualified products and defective products and unloads them into the corresponding qualified product area and defective product area.

10. The detection method according to claim 9, characterized in that: The spring plunger includes a main shell, a compression spring, and a floating head. The compression spring is arranged in the main shell, the lower end of the floating head is pressed on the top of the compression spring, and the upper end of the floating head is exposed outside the upper end of the main shell. A flange is formed on the periphery of the upper end of the main shell, and the flange extends outwardly beyond the outer peripheral side of the main shell. When the spring plunger is placed in the detection positioning groove, the flange rests on the lower mold assembly.

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