Automatic testing system for hardness of clamping piece

Abstract

The invention relates to the technical field of test equipment, in particular to a clamping piece hardness automatic test system, a distribution module comprises a lifting device matched with a discharge port of a material arrangement disc, the tail end of the lifting device is provided with a material distribution mechanism, the material distribution mechanism is provided with a plurality of discharge ports matched with a plurality of hardness testing machines, and the hardness testing machines are connected with the lifting device. A feeding channel is arranged between the discharging port and the corresponding hardness testing machine, the clamping pieces are conveyed to the material distributing mechanism after being arranged by the material arranging disc, are distributed to the discharging port through the material distributing mechanism and then are conveyed to the hardness testing machine through the feeding channel, compared with a mechanical arm, the clamping pieces to be subjected to hardness testing can be distributed more rapidly, and the hardness testing efficiency is improved. A plurality of hardness testing machines can be accommodated in the system, the cost is reduced, the testing efficiency is improved, and a position correcting device is arranged between the hardness testing machines and the feeding channel, so that the clamping pieces can be accurately placed on positioning bosses of the hardness testing machines.

Description

Technical Field

[0001] The invention relates to the technical field of testing equipment, and in particular to an automatic testing system for clip hardness. Background Art

[0002] The clip is a part used to clamp the anchor cable in conjunction with the anchor. It directly bears the tension of the anchor cable, so it needs sufficient structural strength to ensure stability in use.

[0003] In order to ensure the stable use of the clips, the technical personnel in this field have formulated corresponding national standards and continuously optimized the materials and preparation processes to improve the performance. After the clips are manufactured, hardness tests are required, usually sampling tests. The test standard is that the number of samples in each batch is not less than 3% of the amount of each heat treatment furnace and not less than 6 pieces, and then judge whether the hardness of the clips meets the standard. Due to the large amount of clips used, an automatic test system is used for testing. The existing automatic test system includes a material sorting module, a distribution module, a test module, a recovery module and a central control module, wherein the material sorting module includes a feeding conveyor belt, and a material sorting tray is connected to the end of the feeding conveyor belt to sort the clips and test them. The testing module includes multiple hardness testing machines, which are connected to the central control module, so that multiple clips can be tested simultaneously to improve the test efficiency. The distribution module conveys the clips output from the material tray to the hardness testing machine. In the prior art, the distribution module usually uses a robot, and the recycling module includes a recycling box. The robot takes the clips out of the material tray and places them in the hardness testing machine, and takes the clips out of the hardness testing machine and places them in the recycling box. The duration of a single test of the hardness testing machine is 90 pieces per hour. When the number of hardness testing machines is 5, the robot can meet the speed requirements. When the number of hardness testing machines exceeds 5, the robot cannot meet the usage requirements. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a clamp hardness automatic testing system capable of accommodating multiple hardness testing machines.

[0005] The present invention is realized by the following technical scheme: a clip hardness automatic testing system, comprising a material sorting module, a distribution module, a testing module, a recycling module and a central control module, The material sorting module comprises a material sorting tray, The test module includes a plurality of hardness testing machines, and the plurality of hardness testing machines are connected to a central control module. The distribution module delivers the clips output from the material sorting tray to the hardness testing machine. Multiple hardness testing machines are distributed around the distribution module, the material sorting tray has multiple discharge ports, the distribution module includes a distribution mechanism that cooperates with the discharge port, any of the distribution mechanisms is connected to a feeding channel that cooperates with at least one hardness testing machine, and a position correction device is arranged between the hardness testing machine and the feeding channel.

[0006] Furthermore, the hardness testing machine is connected to a sheet ejecting device for ejecting the clip after the test is completed.

[0007] Furthermore, the feeding channel is connected to an anti-blocking device, and the anti-blocking device includes a vibration disturbance component arranged on the feeding channel.

[0008] Furthermore, a guiding device for guiding the clip is also provided in the feeding channel, and the guiding device includes a positioning ridge provided at the bottom of the feeding channel, and the positioning ridge extends along the length direction of the feeding channel.

[0009] Furthermore, the material dividing mechanism includes a material storage trough connected to the material sorting plate, and the clips are arranged and distributed in the material storage trough. The material storage trough is arranged on a flipping drive device, and the flipping drive device can drive the material storage trough to flip, thereby discharging the clips from the material storage trough. The flipping drive device is arranged on a rotating seat, and during the rotation of the rotating seat, the material storage trough is caused to correspond to multiple feeding channels in sequence.

[0010] Furthermore, the position correction device includes a receiving seat arranged on the hardness testing machine, and the receiving seat is connected to the end of the feeding channel. The hardness testing machine is also provided with a grasping device for moving the clip on the receiving seat to the positioning boss. The hardness testing machine is also provided with a qualified clip discharge channel and an unqualified clip discharge channel. The grasping device can drive the clip to flow between the receiving seat, the qualified clip discharge channel, and the unqualified clip discharge channel.

[0011] Furthermore, a mobile inspection platform is arranged on the base of the hardness testing machine, a mobile cylinder and a support plate are arranged on the mobile inspection platform, a positioning boss is arranged on the support plate, the receiving seat, the qualified clip discharge channel, and the unqualified clip discharge channel are all separated from the mobile inspection platform, and the positioning boss is driven to correspond to the receiving seat, the qualified clip discharge channel, and the unqualified clip discharge channel in sequence during the movement of the mobile inspection platform, and the grasping device includes a grasping working head arranged at the end of the piston rod of the mobile cylinder.

[0012] The beneficial effects of the present invention are: 1. Multiple hardness testing machines are distributed around a distribution module. The material sorting disk has multiple discharge ports. The distribution module includes a material dividing mechanism matched with the discharge port. Any of the material dividing mechanisms is connected to a feeding channel matched with at least one hardness testing machine. The material sorting disk sorts the clips and then transports them to the material dividing mechanism, which distributes them to the discharge port through the material dividing mechanism, and then transports them to the hardness testing machine through the feeding channel. Compared with a manipulator, it can distribute the clips to be tested for hardness more quickly, and thus can accommodate more hardness testing machines in the system, reducing costs and increasing test efficiency. A position correction device is provided between the hardness testing machine and the feeding channel, so as to ensure that the clips are accurately placed on the positioning boss of the hardness testing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the layout of each device in Example 1; Figure 2 This is a schematic diagram of the allocation module structure; Figure 3 It is a main view schematic diagram of the allocation module; Figure 4 It is a schematic diagram of the needle-type cylinder structure; Figure 5 This is a schematic diagram of the feeding channel structure of Example 1; Figure 6 It is the structural diagram of the hardness testing machine; Figure 7 This is a schematic diagram of the driving structure of the mobile detection table; Figure 8 It is a schematic diagram of the structure of the mobile detection table; Fig. 9 This is a schematic diagram of the matching relationship between the qualified clip discharge channel and the testing table; Fig.10 This is a schematic diagram of the feeding channel structure of Example 2.

[0014] 1. Material sorting module; 101. Support frame; 102. Material sorting box; 103. Discharging slideway; 104. Needle cylinder; 2. Material distribution mechanism; 201. Rotation drive motor; 202. Rotation seat; 203. Turning table; 204. Material storage tank; 205. Support legs; 206. Turning cylinder; 3. Feeding channel; 301. Blocking strip; 302. Profile groove; 303. Positioning convex ridge; 304. Air cavity; 305. Air hole; 306. Vibration motor; 4. Hardness testing machine; 401. Machine base; 402. Testing table; 403. Discharging channel for unqualified clips; 404. Discharging channel for qualified clips; 405. Receiving seat; 406. Moving cylinder; 407. Support plate; 408. Positioning boss; 409. Support table; 410. Linear guide rail; 411. Rack; 412. Grasping work head.

[0015] 5. Assembly platform; 6. Loading conveyor belt. DETAILED DESCRIPTION

[0016] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] The following will be combined with the drawings in the embodiments of the invention to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments of the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0018] Example 1 like Figure 1-9 As shown, a clip hardness automatic testing system includes a material sorting module 1, a distribution module, a testing module, a recovery module and a central control module.

[0019] The material sorting module 1 includes a loading conveyor belt 6, and a material sorting tray is connected to the end of the loading conveyor belt 6. In the present embodiment, the material sorting tray is installed in the material sorting box 102, thereby forming an isolation, reducing the influence of the vibration of the material sorting tray on the hardness testing machine 4, and the material sorting box 102 is elevated by the support frame 101, thereby increasing the potential energy of the clips, providing a basis for feeding the feeding channel 3, and conveying the clips to be tested for hardness to the material sorting tray through the loading conveyor belt 6. The clips are sorted by the material sorting tray. To ensure the material sorting efficiency of the material sorting tray, the number of clips loaded to the material sorting tray is greater than the number of clips to be tested for hardness. A downward sloping discharge slide 103 is installed at the outlet of the material sorting box 102. The material sorting tray is a multi-channel vibration tray with multiple discharge ports, specifically four discharge ports. Four discharge ports are processed on the material sorting box, so as to be conveniently connected to the distribution module, and the distribution module corresponds There are four groups, and a needle cylinder 104 is installed at the discharge end of the discharge chute 103. Under normal circumstances, the needle cylinder 104 blocks the discharge chute, thereby arranging the clips on the discharge chute 103. The needle cylinder 104 moves to lower one clip at a time. Since the groove depth of the clip gradually increases from the small end to the large end, the movement speed of the needle cylinder 104 is controlled so that the needle cylinder 104 is reset when the lowered clip has not completely passed, thereby blocking the small end of the clip and lowering the clips one by one. During the test, it was found that this method of controlling the lowering of a single clip is simple, but there is a situation where the needle cylinder 104 presses against the clip thread. A vibration motor can be installed on the discharge chute 103. After each operation of the needle cylinder 104, the vibration motor works for 2s to slide down the initial rear clip and prevent the needle cylinder 104 from pressing against the clip thread. The test module includes a plurality of hardness testing machines 4, which are connected to the central control module. The plurality of testing machines are distributed on the same circumference, so as to facilitate the delivery of the clips from the middle position to the plurality of hardness testing machines 4. In this embodiment, the hardness testing machine 4 includes a machine base 401, on which there are a detection machine head and a detection table 402. In this embodiment, the detection table 402 is a mobile detection table 402, on which there is a support table 409, on which the mobile detection table 402 is supported by a linear guide 410, so that the mobile detection table can move along the linear guide 410, and the linear guide 410 uses a dovetail guide. The rails ensure the support strength of the mobile detection table and the stability of the hardness test. A rack 411 parallel to the linear guide rail 410 is installed on the mobile detection table 402. A servo motor (not shown in the figure) is installed on the support table 409. The output shaft of the servo motor is connected to the gear meshing with the rack 411 to control the movement of the mobile detection table. The receiving seat 405, the qualified clip discharge channel 404, and the unqualified clip discharge channel 403 are all separated from the mobile detection table. During the movement of the mobile detection table, the mobile cylinder 406 and the support plate 407 are driven to move, thereby driving the positioning boss 408 to sequentially connect with the receiving seat 405, the qualified clip discharge channel 404, and the unqualified clip discharge channel 403. The clip discharge channel 404 and the unqualified clip discharge channel 403 correspond to each other, and a position correction device is provided between the hardness tester 4 and the feeding channel 3. In this embodiment, the receiving seat 405 is connected to the end of the feeding channel 3, and itself forms a position correction device to limit the position of the clip, thereby facilitating the grasping of the grasping device. The hardness tester 4 is also equipped with a grasping device for moving the clip on the receiving seat 405 to the positioning boss 408. The mobile cylinder 406 uses a servo cylinder to control the stroke. Specifically, the grasping device includes a grasping working head installed at the end of the piston rod of the mobile cylinder 406, and the grasping working head is installed on the mobile The magnetic head at the end of the piston rod of the cylinder 406 removes the clip from the receiving seat 405 and moves the clip to the qualified clip discharge channel 404 and the unqualified clip discharge channel 403. The unqualified clip discharge channel 403, the qualified clip discharge channel 404 and the receiving seat 405 are also installed on the test table 402. During the test, it was found that when the clip slides from the feeding channel 3 to the receiving seat 405, there is a difference in the position on the receiving seat 405. The profiled groove with a frosted surface is installed in the receiving seat 405 to increase the friction force. At the same time, the length value of the receiving seat 405 is controlled to be 2-2 of the clip length value.5 times, the position of the clip can be controlled, the magnetic head can absorb the clip, and then move to the positioning boss to perform hardness testing. It was also found in the test that when pushing the material to the unqualified clip discharge channel 403 and the qualified clip discharge channel 404, the clip cannot be well separated from the magnetic head. When the magnetic head uses an electromagnet, the clip can be controlled to be separated from the magnetic head, but the cable of the electromagnet is easily damaged. The joints of the unqualified clip discharge channel 403, the qualified clip discharge channel 404 and the detection table 402 are improved. Specifically, the unqualified clip discharge channel 403 and the qualified The clip discharge channel 404 is inclined, and the feed ends of the unqualified clip discharge channel 403 and the qualified clip discharge channel 404 are lower than the detection table 402, thereby forming a drop step. When the clip is pushed through the drop step, the end of the clip automatically swings down. During the reset process of the moving cylinder 406, the clip is blocked by the drop step and then separated from the magnetic head. The magnetic head can use a permanent magnet. The receiving seat 405 is connected to the distribution module, and the unqualified clip discharge channel 403 is connected to the unqualified box, and the qualified clip discharge channel 404 is connected to the qualified box, and then the subsequent processing is carried out.

[0020] The distribution module conveys the clips output by the material sorting tray to the hardness testing machine 4. Specifically, the distribution module includes a distribution mechanism 2 that cooperates with the material outlet of the material sorting tray. The distribution mechanism 2 includes a storage trough 204 connected to the material sorting tray. The clips are temporarily stored in the storage trough 204. The storage trough 204 is installed on a flipping drive device through a flipping table 203. The flipping drive device can drive the storage trough 204 to flip, thereby causing the clips to be discharged from the storage trough 204 and enter the feeding channel 3. In some embodiments, a push rod or other structure can also be used to push the clips in the storage trough 204 into the feeding channel 3, but the structure is relatively complex and requires regular maintenance. The flipping drive device is installed on a rotating seat. The flipping drive device uses a flipping cylinder 206. The rotating seat 202 is connected to a rotating drive motor 201. By controlling the rotation angle of the rotating drive motor 201, the storage trough 204 is caused to correspond to multiple feeding channels 3 in sequence during the rotation of the rotating seat, specifically 3-4 feeding channels 3, to enter. The clips in the storage trough 204 are transported to the feeding channel 3, slide through the feeding channel 3 to the receiving seat 405, and are grabbed by the grasping work head and then placed on the positioning boss 408. Compared with the manipulator, it can distribute the clips to be tested for hardness more quickly, and thus can accommodate a larger number of hardness testers 4 in the system, reducing costs, increasing test efficiency, and eliminating the number limit of hardness testers 4. It is suitable for large-scale testing centers, and its cost is greatly reduced compared with that of the manipulator. For the convenience of installation, the hardness testers corresponding to the same distribution module are installed on an assembly platform, so that the position and height can be accurately controlled, and pre-installation can be performed. A position correction device is installed between the hardness tester 4 and the feeding channel 3, so as to ensure that the clips are accurately placed on the positioning boss 408 of the hardness tester 4, and the rotating drive motor 201 is connected to the support leg 205, so as to control the height so that the storage trough 204 corresponds to the position of the discharge chute 103.

[0021] The feeding channel 3 is connected with an anti-blocking device, which includes a disturbance device installed in the middle position of the feeding channel 3. The disturbance device is a pneumatic disturbance device. A guide device for guiding the clip is also installed in the feeding channel 3. The guide device includes a positioning convex rib 303 installed at the bottom of the feeding channel 3. The positioning convex rib 303 extends along the length direction of the feeding channel 3. A blocking strip 301 is integrally formed at the upper end of the side wall of the feeding channel 3. A profiling groove 302 is formed between the blocking strip 301 and the positioning convex rib 303. The posture of the clip is limited by the profiling groove 302, thereby ensuring that the posture of the clip entering the hardness tester 4 is stable. The pneumatic disturbance device includes an air pipe connected to the middle position of the feeding channel 3, an air cavity 304 is formed in the positioning convex rib 303, and an air hole 305 is processed on the positioning convex rib 303. The air hole 305 is connected with the air cavity 304. The feeding channel 3 is disturbed by a pulse airflow. Due to the positioning convex rib 303 The length is relatively long, and correspondingly, the length of the air cavity 304 is also relatively long. A plurality of joints connected to the air cavity 304 are installed at intervals on the feeding channel 3. The joints are connected to the high-pressure air source through air pipes, and then the airflow is distributed to the air cavity 304 to ensure the disturbance effect. In the test process, it is found that the pulse airflow causes the feeding channel 3 to vibrate, which promotes the clip to slide down. The timing of triggering the disturbance device is to install detection sensor 1 at the entrance of the feeding channel 3 and detection sensor 2 at the outlet of the feeding channel 3. The time for the test clip to move from detection sensor 1 to detection sensor 2 is measured, and the time range t for the clip to move from detection sensor 1 to detection sensor 2 is calculated. When detection sensor 1 is triggered and detection sensor 2 is not triggered within the time range t, it is judged as material blockage, and the disturbance device works until detection sensor 2 is triggered. The disturbance device stops working. It is worth noting that the number of times detection sensor 2 is triggered is recorded as the corresponding number of tests of hardness tester 4.

[0022] In this embodiment, detection sensor three is installed at the inlet end of the material storage trough 204. Detection sensor three is triggered to determine that a clip has entered the material storage trough 204. Detection sensor one, detection sensor two, and detection sensor three all select photoelectric switches. After detection sensor one is triggered, the flip cylinder is reset, and then the rotation drive motor 201 is reset. After the rotation drive motor 201 is reset, the material sorting tray continues to work until detection sensor three is triggered again.

[0023] The recycling module includes a qualified box (not shown in the figure) and an unqualified box (not shown in the figure). The qualified box is connected to the qualified clip discharge channel 404 through a slide, and the unqualified box is connected to the unqualified clip discharge channel 403 through a slide. The moving cylinder 406 and the gripping device also form a film ejection device.

[0024] The automatic testing system for the hardness of a clip provided in this embodiment has the following testing method: The information of the clip to be tested is input into the central control module, and then the clip is transported to the material sorting tray through the feeding conveyor belt. After the material sorting tray sorts the clip, the clip is transported to multiple hardness testing machines 4 through the distribution module. The hardness testing machine 4 tests the hardness data of the clip and uploads it to the central control module. The central control module determines whether the hardness value of the clip is qualified and outputs the judgment result.

[0025] Among them, the hardness data of the clip tested by the hardness testing machine is in accordance with GB / T230.1. The hardness testing machine first applies 98.07N to the clip and then applies a total test force of 588.4N. By detecting the difference in the initial indentation depth h, the Rockwell hardness is calculated according to the formula: Rockwell hardness = 100-h / 0.002. The scale selects HRA, detects three points, and records the average value of the three points as the test result of the sample. The average value of the three points is calculated. If the average value is within the qualified range, the clip is judged to be qualified and sent to the qualified box. If the average value is not within the qualified range, the clip is judged to be unqualified and sent to the unqualified box.

[0026] Example 2 like Fig.10 As shown, a clip hardness automatic testing system is provided. The difference from Example 1 is that the vibration disturbance device is a vibration motor 306 installed in the middle position of the feeding channel 3. The number of vibration motors 306 can be multiple to ensure the disturbance amplitude.

[0027] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A clip hardness automatic testing system, comprising a material sorting module, a distribution module, a testing module, a recycling module and a central control module, The material sorting module comprises a material sorting tray, The test module includes a plurality of hardness testing machines, and the plurality of hardness testing machines are connected to a central control module. The distribution module delivers the clips output from the material sorting tray to the hardness testing machine. It is characterized in that Multiple hardness testing machines are distributed around the distribution module, the material sorting tray has multiple discharge ports, the distribution module includes a distribution mechanism that cooperates with the discharge port, any of the distribution mechanisms is connected to a feeding channel that cooperates with at least one hardness testing machine, and a position correction device is arranged between the hardness testing machine and the feeding channel.

2. The automatic test system for clip hardness according to claim 1, characterized in that: The hardness testing machine is connected to a sheet ejecting device for ejecting the clip after the test is completed.

3. The automatic testing system for clip hardness according to claim 1 is characterized in that: The feeding channel is connected with an anti-blocking device, and the anti-blocking device includes a vibration disturbance component arranged on the feeding channel.

4. The automatic testing system for clip hardness according to claim 1 is characterized in that: A guiding device for guiding the clip is also arranged in the feeding channel, and the guiding device includes a positioning convex ridge arranged at the bottom of the feeding channel, and the positioning convex ridge extends along the length direction of the feeding channel.

5. The automatic testing system for clip hardness according to claim 1 is characterized in that: The material dividing mechanism includes a material storage trough connected to the material sorting plate, and the clips are arranged and distributed in the material storage trough. The material storage trough is arranged on a flipping drive device, and the flipping drive device can drive the material storage trough to flip, thereby discharging the clips from the material storage trough. The flipping drive device is arranged on a rotating seat, and during the rotation of the rotating seat, the material storage trough is caused to correspond to multiple feeding channels in sequence.

6. The automatic test system for clip hardness according to claim 1, characterized in that: The position correction device includes a receiving seat arranged on the hardness testing machine, and the receiving seat is connected to the end of the feeding channel. The hardness testing machine is also provided with a grasping device for moving the clip on the receiving seat to the positioning boss. The hardness testing machine is also provided with a qualified clip discharge channel and an unqualified clip discharge channel. The grasping device can drive the clip to flow between the receiving seat, the qualified clip discharge channel, and the unqualified clip discharge channel.

7. The automatic test system for clip hardness according to claim 6, characterized in that: A mobile testing platform is arranged on the base of the hardness testing machine, a mobile cylinder and a support plate are arranged on the mobile testing platform, a positioning boss is arranged on the support plate, the receiving seat, the qualified clip discharge channel, and the unqualified clip discharge channel are all separated from the mobile testing platform, and the positioning boss is driven to correspond to the receiving seat, the qualified clip discharge channel, and the unqualified clip discharge channel in sequence during the movement of the mobile testing platform, and the grasping device includes a grasping working head arranged at the end of the piston rod of the mobile cylinder.

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