High-precision on-line non-contact measurement device and method for external dimension of positioning pin shaft

Abstract

The invention relates to the technical field of measuring devices, and provides a positioning pin shaft external dimension high-precision on-line non-contact measuring device which comprises a supporting frame, an external diameter instrument controller is installed in the middle of one side of the supporting frame, ground feet are installed at the four corners of the bottom of the supporting frame, and a top plate is fixedly installed in the middle of the top of the supporting frame. A material pushing air cylinder is installed on one side of the top of the top plate, a sliding strip is installed on one side of the material pushing air cylinder, outer diameter measuring instruments are symmetrically installed on the two sides of the sliding strip, and a qualified product discharging groove is formed in one end of the sliding strip; according to the high-precision online non-contact measurement device for the external dimension of the positioning pin shaft, the pin shaft is guided to one side of the pushing cylinder through the blanking groove, the pushing cylinder can generate pushing force on the pin shaft, and the pushing force and the pin shaft are continuously accumulated above the sliding strip, so that the sliding of the pin shaft above the sliding strip can be realized; when the pin shaft is located in the middle of the two outer diameter measuring instruments, the outer diameter measuring instruments can measure the size of the pin shaft.

Description

Technical Field

[0001] This invention relates to the field of measuring device technology, and in particular to a high-precision online non-contact measuring device for the external dimensions of a positioning pin. Background Technology

[0002] A pin is a standardized fastener that can be used for static fixed connection or for relative movement with the connected parts. It is mainly used at the hinge joint of two parts.

[0003] A pin dimension detection device described in patent publication number CN212806831U includes a placement cylinder, a lifting cylinder, a detection plate, a motor, grippers, and a discharge trough. First, the pin to be tested is placed in the placement cylinder. Then, the lifting cylinder drives the detection plate to contact the top of the pin, measuring its length. If the length is acceptable, the pin proceeds to diameter detection. The motor then drives the placement cylinder to rotate towards the grippers. If the pin passes smoothly through the grippers, the diameter is acceptable. At this point, the motor continues to drive the placement cylinder towards the grippers, causing the pin to fall from the discharge trough under its own weight, completing the detection. This device can simultaneously detect length and diameter, reducing operational steps, lowering labor intensity, and improving detection efficiency and accuracy, thus increasing the yield.

[0004] The existing inspection methods mostly involve operators using measuring rulers and gauges to measure, or placing the pin into a specially matched caliper to see if it fits perfectly, in order to determine the length and diameter of the pin. This inspection method not only increases the intensity of manual labor, but also has low inspection accuracy, affecting the yield of finished products. Summary of the Invention

[0005] Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a high-precision online non-contact measuring device for the external dimensions of positioning pins. This solves the problem that most existing detection methods rely on operators using measuring rulers or gauges to measure the pins, or placing the pins into specially designed holders to check if they fit properly, in order to determine the length and diameter of the pins. These methods not only increase the intensity of manual labor but also result in low detection accuracy, affecting the yield rate.

[0006] Technical solution To achieve the above objectives, the present invention provides the following technical solution: A high-precision online non-contact measuring device for the outer dimension of a positioning pin includes a support frame. An outer diameter gauge controller is mounted on the center of one side of the support frame. Foot plates are installed at the four corners of the bottom of the support frame. A top plate is fixedly mounted on the center of the top of the support frame. A pusher cylinder is mounted on one side of the top of the top plate. A slide bar is mounted on one side of the pusher cylinder. Outer diameter measuring instruments are symmetrically mounted on both sides of the slide bar. A qualified product discharge trough is mounted at one end of the slide bar. A waste product discharge trough is mounted on the side of the slide bar closest to the outer diameter measuring instrument. A waste product collection mechanism is mounted at the bottom of the waste product discharge trough. A discharge assembly is mounted above one side of the pusher cylinder. An eddy current proximity switch support is mounted at the bottom of the discharge assembly. A waste gas pipe is mounted on one side of the upper end of the waste product discharge trough.

[0007] Preferably, the feeding assembly includes a feeding trough installed on the top of the support frame, an adjusting plate is provided inside the feeding trough, a threaded rod is rotatably mounted on one side of the adjusting plate via a bearing, and a guide rod is installed on one side of the adjusting plate.

[0008] Preferably, the guide rod is slidably engaged with the feeding trough, the threaded rod is threadedly connected to the feeding trough, and the feeding trough is provided with multiple pins inside.

[0009] Preferably, an eddy current proximity switch for monitoring the pin is embedded in the surface of the eddy current proximity switch support.

[0010] Preferably, the waste collection mechanism includes a fixing block installed below the waste discharge chute, a collection bucket is provided on one side of the fixing block, a plug-in block is fixedly installed on the top side of the collection bucket, and a positioning component for fixing the plug-in block is provided on one side of the fixing block.

[0011] Preferably, the positioning component includes a rod inserted into one side of the fixing block, push plates are symmetrically installed on both sides of the rod, and a restoring spring is fixedly connected between the lower push plate and the fixing block.

[0012] Preferably, a connecting plate is fixedly connected to the inner wall of the fixing block, and bolts are threaded into the connecting plate.

[0013] A high-precision online non-contact measurement method for the outer dimension of a positioning pin includes the following steps: S1. Install the waste collection bin: Rotate the bolt of the positioning component to leave enough distance between the bolt and the push plate below. Pull the plug rod to one side to insert the plug block on the top side of the collection bin into the fixed block. Rotate the bolt again to make one end of the bolt abut against the push plate. Use the plug rod to restrict the position of the plug block to complete the fixed installation of the collection bin. S2. Adjust the size of the feeding assembly to match the pin: According to the size of the pin to be measured, rotate the threaded rod of the feeding assembly. The adjusting plate moves along the inside of the feeding groove under the sliding restriction of the guide rod until the adjusting plate and the inner wall of the feeding groove form a channel for the pin to slide, ensuring that the pin slides stably and remains relatively horizontal with the slide bar. S3. Loading and monitoring the supply of pins: Place the multiple pins to be measured into the feeding trough. The pins are guided to one side of the pushing cylinder through the feeding trough. The eddy current proximity switch embedded in the eddy current proximity switch support monitors whether there are pins on one side of the pushing cylinder so as to replenish the pins in time. S4. Start pushing and measure dimensions: Start the pushing cylinder, which generates a thrust that acts on the pin. Under the cumulative thrust of multiple pins, the pin slides along the slide bar. When the pin slides to the middle of the two symmetrically installed outer diameter measuring instruments, the outer diameter measuring instrument performs a high-precision non-contact measurement of the outer dimension of the pin, and the measurement data is transmitted to the outer diameter instrument controller. S5. Sorting and unloading based on measurement results: If the outer diameter gauge controller determines that the pin is a defective product, it controls the waste gas pipe to spray a strong airflow to blow the defective pin into the waste unloading trough. The defective pin slides down the waste unloading trough into the collection bucket to complete the collection. If it is determined to be a qualified product, the pin continues to slide along the slide bar and finally enters the qualified product unloading trough to complete the unloading.

[0014] Beneficial effects Compared with the prior art, the beneficial effects of the present invention are: The pin is guided to one side of the pusher cylinder through the feeding chute. The pusher cylinder can generate a thrust on the pin. As the pin accumulates above the slide bar, it can slide above the slide bar. When the pin is in the middle of the two outer diameter measuring instruments, the outer diameter measuring instruments can measure the size of the pin. If it is unqualified, the waste gas pipe can blow the pin into the waste feeding chute through a strong airflow. Finally, it enters the collection bucket along the direction of the waste feeding chute to collect the waste. If it is qualified, it continues to move along the slide bar and enters the qualified product feeding chute. The eddy current proximity switch can detect whether there is a pin on one side of the pusher cylinder, which can help remind the user to add material.

[0015] When measuring pins of different sizes, the position of the adjusting plate can be adjusted to prevent the pin from sliding off the surface of the feed chute and to make it more stable so that the pin and the slide bar are in a relatively horizontal state. Specifically, by rotating the threaded rod, the adjusting plate can be adjusted in position under the restriction of the guide rod, thereby restricting the position of the pin.

[0016] When installing the collection bucket, first turn the bolt until there is a sufficient distance between the push plate and the bolt. Then, pull the plug rod to one side to insert the plug block into the fixing block to install the collection bucket. Turn the bolt again so that one end of the bolt abuts against the push plate, which will restrict the position of the plug rod and thus enhance the fixing effect of the collection bucket. Attached Figure Description

[0017] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the following describes the preferred embodiments of the present invention in detail with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure in an embodiment of the present invention; Figure 2 This is a side view of the structure in an embodiment of the present invention; Figure 3 This is a partial structural schematic diagram of an embodiment of the present invention; Figure 4 As described in the embodiments of the present invention Figure 2 A magnified structural diagram of the structure; Figure 5 As described in the embodiments of the present invention Figure 3 A magnified structural diagram of the structure; Figure 6 As described in the embodiments of the present invention Figure 4 A schematic diagram of the positioning component; Legend: 11. Support frame; 12. Outer diameter gauge controller; 13. Foot; 14. Top plate; 15. Push cylinder; 16. Sliding bar; 17. Eddy current proximity switch support; 18. Outer diameter measuring instrument; 19. Qualified product unloading chute; 10. Scrap product unloading chute; 2. Unloading assembly; 21. Unloading chute; 22. Adjusting plate; 23. Threaded rod; 24. Guide rod; 25. Pin; 26. Eddy current proximity switch; 3. Scrap collection mechanism; 31. Fixing block; 32. Insertion block; 33. Collection bucket; 34. Positioning assembly; 341. Insert rod; 342. Push plate; 343. Restoration spring; 344. Connecting plate; 345. Bolt; 4. Waste gas pipe. Detailed Implementation

[0019] The technical solution in this application embodiment effectively addresses the problem that existing detection methods mostly rely on operators using measuring rulers or gauges to measure the length and diameter of the pin, or placing the pin into a specially designed holder to check if it fits properly. This method not only increases manual labor intensity but also results in low accuracy, affecting the yield rate. The overall approach is as follows: like Figures 1 to 6To address the problems existing in the prior art, the present invention provides a high-precision online non-contact measuring device for the outer dimension of a positioning pin, comprising a support frame 11, an outer diameter gauge controller 12 installed in the middle of one side of the support frame 11, feet 13 installed at the four corners of the bottom of the support frame 11, a top plate 14 fixedly installed in the middle of the top of the support frame 11, a pusher cylinder 15 installed on one side of the top of the top plate 14, a slide bar 16 installed on one side of the pusher cylinder 15, an outer diameter measuring instrument 18 symmetrically installed on both sides of the slide bar 16, a qualified product unloading trough 19 installed at one end of the slide bar 16, a waste product unloading trough 10 installed on the side of the slide bar 16 near the outer diameter measuring instrument 18, a waste product collection mechanism 3 installed at the bottom of the waste product unloading trough 10, a feeding assembly 2 installed above one side of the pusher cylinder 15, an eddy current proximity switch support 17 installed at the bottom of the feeding assembly 2, and a waste gas pipe 4 installed on one side of the upper end of the waste product unloading trough 10.

[0020] A high-precision online non-contact measurement method for the outer dimension of a positioning pin includes the following steps: S1. Install the waste collection bin: Rotate the bolt 345 of the positioning component 34 to leave a sufficient distance between the bolt 345 and the lower push plate 342. Pull the insertion rod 341 to one side to insert the insertion block 32 on the top side of the collection bin 33 into the fixing block 31. Rotate the bolt 345 again to make one end of the bolt 345 abut against the push plate 342. The insertion rod 341 restricts the position of the insertion block 32 to complete the fixed installation of the collection bin 33. S2. Adjust the size of the feeding assembly to match the pin: According to the size of the pin 25 to be measured, rotate the threaded rod 23 of the feeding assembly 2. The adjusting plate 22 moves along the inside of the feeding groove 21 under the sliding restriction of the guide rod 24 until the adjusting plate 22 and the inner wall of the feeding groove 21 form a channel to match the sliding of the pin 25, ensuring that the pin 25 slides stably and remains relatively horizontal with the slide bar 16. S3. Loading and monitoring the supply of pins: Place multiple pins 25 to be measured into the feeding groove 21. The pins 25 are guided to one side of the pushing cylinder 15 through the feeding groove 21. The presence of pins 25 on one side of the pushing cylinder 15 is monitored by the eddy current proximity switch 26 embedded in the eddy current proximity switch support 17 so as to replenish the pins 25 in time. S4. Start pushing and measure dimensions: Start the pushing cylinder 15, which generates a thrust on the pin 25. Under the cumulative thrust of multiple pins 25, the pin 25 slides along the slide bar 16. When the pin 25 slides to the middle of the two symmetrically installed outer diameter measuring instruments 18, the outer diameter measuring instrument 18 performs high-precision non-contact measurement of the outer dimension of the pin 25, and the measurement data is transmitted to the outer diameter instrument controller 12. S5. Sorting and unloading according to measurement results: If the outer diameter gauge controller 12 determines that the pin 25 is a defective product, it controls the waste gas pipe 4 to spray a strong airflow to blow the defective pin 25 into the waste unloading trough 10. The defective pin 25 slides down the waste unloading trough 10 into the collection bucket 33 to complete the collection. If it is determined to be a qualified product, the pin 25 continues to slide along the slide bar 16 and finally enters the qualified product unloading trough 19 to complete the unloading.

[0021] By adopting the above technical solution, during use, the pin 25 is guided to one side of the pusher cylinder 15 through the feeding groove 21. The pusher cylinder 15 can generate a pushing force on the pin 25. Since the pin 25 accumulates continuously above the slide bar 16, the pin 25 can slide above the slide bar 16. When the pin 25 is located in the middle of the two outer diameter measuring instruments 18, the outer diameter measuring instrument 18 can measure the size of the pin 25. If it is unqualified, the waste gas pipe 4 can blow the pin 25 into the waste feeding groove 10 through a strong airflow. Finally, it enters the collection bucket 33 along the direction of the waste feeding groove 10 to collect the waste. If it is qualified, it continues to move along the slide bar 16 and enters the qualified product feeding groove 19. The eddy current proximity switch 26 can detect whether there is a pin 25 on one side of the pusher cylinder 15.

[0022] Specifically, the feeding assembly 2 includes a feeding trough 21 installed on the top of the support frame 11. An adjusting plate 22 is provided inside the feeding trough 21. A threaded rod 23 is rotatably installed on one side of the adjusting plate 22 via a bearing. A guide rod 24 is installed on one side of the adjusting plate 22. The guide rod 24 is slidably engaged with the feeding trough 21. The threaded rod 23 is threadedly connected to the feeding trough 21. Multiple pins 25 are provided inside the feeding trough 21. An eddy current proximity switch 26 for monitoring the pins 25 is embedded on the surface of the eddy current proximity switch support 17.

[0023] By adopting the above technical solution, when measuring pins 25 of different sizes, the position of the adjusting plate 22 can be adjusted to prevent the pins 25 from sliding more stably from the surface of the feed groove 21, so that the pins 25 and the slide bar 16 are in a relatively horizontal state. Specifically, by rotating the threaded rod 23, the adjusting plate 22 can be adjusted in position under the restriction of the guide rod 24, thereby achieving the position restriction of the pins 25.

[0024] Specifically, the waste collection mechanism 3 includes a fixed block 31 installed below the waste discharge trough 10. A collection bucket 33 is provided on one side of the fixed block 31. A plug-in block 32 is fixedly installed on the top side of the collection bucket 33. A positioning component 34 for fixing the plug-in block 32 is provided on one side of the fixed block 31. The positioning component 34 includes a plug rod 341 inserted into one side of the fixed block 31. Push plates 342 are symmetrically installed on both sides of the plug rod 341. A restoring spring 343 is fixedly connected between the push plate 342 located below and the fixed block 31. A connecting plate 344 is fixedly connected to the inner wall of the fixed block 31. A bolt 345 is threadedly connected to the inside of the connecting plate 344.

[0025] By adopting the above technical solution, when installing the collection bucket 33, first rotate the bolt 345 until a sufficiently large distance is left between the push plate 342 and the bolt 345, then pull the insertion rod 341 to one side to insert the insertion block 32 into the fixing block 31 to install the collection bucket 33. Then rotate the bolt 345 again so that one end of the bolt 345 abuts against the push plate 342, which can restrict the position of the insertion rod 341, thereby strengthening the fixing effect of the collection bucket 33.

[0026] Working principle: During use, the pin 25 is guided to one side of the pusher cylinder 15 through the feeding chute 21. The pusher cylinder 15 can generate a pushing force on the pin 25. As the pin 25 continuously accumulates above the slide bar 16, it can slide above the slide bar 16. When the pin 25 is located in the middle of the two outer diameter measuring instruments 18, the outer diameter measuring instruments 18 can measure the size of the pin 25. If it is unqualified, the waste gas pipe 4 can blow the pin 25 into the waste feeding chute 10 through a strong airflow. Finally, it enters the collection bucket 33 along the direction of the waste feeding chute 10 to collect the waste. If it is qualified, it continues to move along the slide bar 16 and enters the qualified product feeding chute 19. The eddy current proximity switch 26 can detect whether there is a pin 25 on one side of the pusher cylinder 15, which can help remind the user to add material. When measuring the pin 25, the position of the adjusting plate 22 can be adjusted to prevent the pin 25 from sliding off the surface of the feed trough 21 and to make it more stable so that the pin 25 and the slide bar 16 are in a relatively horizontal state. Specifically, by rotating the threaded rod 23, the adjusting plate 22 can be adjusted in position under the restriction of the guide rod 24, thereby restricting the position of the pin 25. When installing the collection bucket 33, first rotate the bolt 345 until a sufficient distance is left between the push plate 342 and the bolt 345, then pull the insertion rod 341 to one side to insert the insertion block 32 into the fixing block 31 to install the collection bucket 33. Rotate the bolt 345 again so that one end of the bolt 345 abuts against the push plate 342, thereby restricting the position of the insertion rod 341 and strengthening the fixing effect of the collection bucket 33.

[0027] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A high-precision online non-contact measuring device for the outer dimensions of a positioning pin, comprising a support frame (11), characterized in that: An outer diameter gauge controller (12) is installed in the middle of one side of the support frame (11). Footplates (13) are installed at the four corners of the bottom of the support frame (11). A top plate (14) is fixedly installed in the middle of the top of the support frame (11). A pusher cylinder (15) is installed on one side of the top of the top plate (14). A slide bar (16) is installed on one side of the pusher cylinder (15). An outer diameter measuring instrument (18) is symmetrically installed on both sides of the slide bar (16). 6) One end is equipped with a qualified product unloading trough (19), the slide bar (16) is equipped with a waste product unloading trough (10) on the side near the outer diameter measuring instrument (18), the bottom end of the waste product unloading trough (10) is equipped with a waste product collection mechanism (3), the upper side of the pusher cylinder (15) is equipped with a feeding assembly (2), the bottom end of the feeding assembly (2) is equipped with an eddy current proximity switch support (17), and the upper side of the waste product unloading trough (10) is equipped with a waste gas pipe (4).

2. The high-precision online non-contact measuring device for the outer dimension of a positioning pin as described in claim 1, characterized in that: The feeding assembly (2) includes a feeding trough (21) installed on the top of the support frame (11). An adjustment plate (22) is provided inside the feeding trough (21). A threaded rod (23) is rotatably installed on one side of the adjustment plate (22) via a bearing. A guide rod (24) is installed on one side of the adjustment plate (22).

3. The high-precision online non-contact measuring device for the outer dimension of a positioning pin as described in claim 2, characterized in that: The guide rod (24) is slidably engaged with the feed groove (21), the threaded rod (23) is threadedly connected to the feed groove (21), and the feed groove (21) is provided with multiple pins (25).

4. The high-precision online non-contact measuring device for the outer dimension of a positioning pin as described in claim 3, characterized in that: The surface of the eddy current proximity switch support (17) is inlaid with an eddy current proximity switch (26) for monitoring the pin (25).

5. The high-precision online non-contact measuring device for the outer dimension of a positioning pin according to claim 1, characterized in that: The waste collection mechanism (3) includes a fixing block (31) installed below the waste discharge trough (10). A collection bucket (33) is provided on one side of the fixing block (31). A plug-in block (32) is fixedly installed on the top side of the collection bucket (33). A positioning component (34) for fixing the plug-in block (32) is provided on one side of the fixing block (31).

6. The high-precision online non-contact measuring device for the outer dimension of a positioning pin according to claim 5, characterized in that: The positioning component (34) includes a rod (341) inserted into one side of the fixing block (31), and push plates (342) are symmetrically installed on both sides of the rod (341). A restoring spring (343) is fixedly connected between the push plate (342) located below and the fixing block (31).

7. The high-precision online non-contact measuring device for the outer dimension of a positioning pin according to claim 6, characterized in that: The inner wall of the fixing block (31) is fixedly connected to a connecting plate (344), and the connecting plate (344) is internally threaded with bolts (345).

8. A high-precision online non-contact measurement method for the outer dimension of a positioning pin, based on the high-precision online non-contact measurement device for the outer dimension of a positioning pin according to claim 6, characterized in that: The method includes the following steps: S1. Install the waste collection bin: Rotate the bolt (345) of the positioning component (34) to make a sufficient distance between the bolt (345) and the push plate (342) below. Pull the plug rod (341) to one side to insert the plug block (32) on the top side of the collection bin (33) into the fixed block (31). Rotate the bolt (345) again to make one end of the bolt (345) abut against the push plate (342). The position of the plug block (32) is restricted by the plug rod (341) to complete the fixed installation of the collection bin (33). S2. Adjust the size of the feeding assembly to match the pin: According to the size of the pin (25) to be measured, rotate the threaded rod (23) of the feeding assembly (2). The adjusting plate (22) moves along the inside of the feeding groove (21) under the sliding restriction of the guide rod (24) until the adjusting plate (22) and the inner wall of the feeding groove (21) form a channel for the sliding of the matching pin (25), ensuring that the pin (25) slides stably and remains relatively horizontal with the slide bar (16); S3. Loading and monitoring the supply of pins: Place the multiple pins (25) to be measured into the feeding groove (21). The pins (25) are guided to the side of the pushing cylinder (15) through the feeding groove (21). The eddy current proximity switch (26) embedded in the eddy current proximity switch support (17) monitors whether there are pins (25) on the side of the pushing cylinder (15) so as to replenish the pins (25) in time. S4. Start the pusher and measure the dimensions: Start the pusher cylinder (15), the pusher cylinder (15) generates a thrust acting on the pin (25), under the cumulative thrust of multiple pins (25), the pin (25) slides along the slide bar (16); when the pin (25) slides to the middle of the two symmetrically installed outer diameter measuring instruments (18), the outer diameter measuring instrument (18) performs high-precision non-contact measurement of the outer dimension of the pin (25), and the measurement data is transmitted to the outer diameter instrument controller (12). S5. Sorting and unloading according to measurement results: If the outer diameter meter controller (12) determines that the pin (25) is a defective product, it controls the waste gas pipe (4) to spray out a strong airflow to blow the defective pin (25) into the waste unloading trough (10). The defective pin (25) slides down the waste unloading trough (10) into the collection bucket (33) to complete the collection. If it is determined to be a qualified product, the pin (25) continues to slide along the slide bar (16) and finally enters the qualified product unloading trough (19) to complete the unloading.

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