Spring detection device and detection method
By using V-block magnetic positioning and collar rotation, the problem of inaccurate measurement caused by low roundness in spring detection was solved, achieving higher measurement precision and accuracy.
Patent Information
- Application Number
- CN202511134485.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-14
- Publication Date
- 2025-10-31
AI Technical Summary
In existing technologies, the roundness accuracy of springs is not high, which leads to differences in the coordinate values of the highest point at different axial detection points, resulting in inaccurate measurement data.
A V-shaped block magnetically positions the spring body. The spring body rotates due to friction caused by the rotation of the collar, which causes the axial position of the high point detection position to change. The height coordinates of multiple different points are recorded, and the average value is taken as the measurement result.
The measurement accuracy of spring testing has been improved. By performing multiple measurements and averaging, measurement errors have been reduced, ensuring the accuracy of the test results.
Smart Images
Figure CN120868932A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of spring testing technology, and more specifically, to a spring testing device and testing method. Background Technology
[0002] Currently, in the testing process for mattress springs, the spring is placed horizontally along its axis, and a laser emitter emits a laser beam from above the spring, hitting its highest point. A visual acquisition system then captures and analyzes the laser image of this highest point to obtain its coordinates, which are used as the dimensional basis for judging whether the spring is qualified. However, due to the low roundness accuracy of the spring, the coordinate values of the highest point vary at different testing points along the spring's axis, resulting in inaccuracies in data obtained from a single measurement. Summary of the Invention
[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a spring detection device and detection method to improve measurement accuracy.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: a spring detection device, which uses a laser emitting device and a vision acquisition system to detect the spring body, includes a positioning seat, which includes two V-shaped positioning surfaces. The positioning surfaces are magnetic, and the spring body is positioned by magnetic attraction through the two positioning surfaces. The detection device also includes a fixing plate, which has a limiting groove. The limiting groove is an annular groove, including a groove extending in a left-right direction and a groove extending in a up-down direction. A baffle is installed on the fixing plate, which is located below the limiting groove. The positioning seat can move left and right. An insert plate is installed on the positioning seat. The insert plate moves left and right synchronously with the positioning seat and can also move up and down. The insert plate is fixedly installed. There is a fixed post that passes through the insert plate and is inserted into the limiting groove. The fixed post can move circumferentially along the inner wall of the limiting groove. The fixed post is rotatably connected to a shaft that passes through the fixed post and can rotate along its own axis. The spring body includes small-diameter portions located at both ends of the axial direction. A collar is installed at one end of the shaft and a hanging plate is installed at the other end. In the initial state, the insert plate is located at the lower limit position, the fixed post is located at the left end of the first groove, the hanging plate is vertically set, the bottom right end of the hanging plate abuts against the left end of the second baffle, and the lower end of the collar abuts against the bottom inner wall surface of the small-diameter portion. When the insert plate moves to the right, the hanging plate rotates and drives the collar to rotate. The collar drives the small-diameter portion to rotate through friction, so that the position of the highest point of the top of the spring body changes axially.
[0005] The invention is further configured such that a slide rail is installed at the bottom of the positioning seat, the positioning seat can slide left and right along the slide rail, a rod is slidably connected to the inner wall of the positioning seat, the rod can move left and right, the rod includes a boss, the boss abuts against the left end of the positioning seat, a spring is sleeved on the rod, one end of the spring abuts against the right end of the positioning seat, and the other end abuts against a fixing block; the detection device includes a cam, the cam can rotate along its own axis, the cam is located on the left side of the rod, and when the cam rotates, its outer wall can push the rod to move to the right.
[0006] The invention is further configured such that the detection device includes a baffle, and a limit block is installed on the rod. When the rod is in the left extreme position, the baffle abuts against the left end of the limit block.
[0007] The invention is further configured such that the positioning seat is equipped with an extension plate, the extension plate has a groove, the insert plate is inserted into the groove, and the insert plate can move up and down along the inner wall of the groove.
[0008] The invention is further configured such that the detection device includes a conveyor track, a conveyor seat is mounted on the conveyor track, a base is mounted on the conveyor seat, and a positioning seat is slidably connected to the upper end of the base.
[0009] The invention is further configured such that the collar passes through the two smaller diameter portions.
[0010] The present invention also adopts the following technical solution: a spring detection method, using a spring detection device, the spring body is horizontally arranged axially, the spring body includes a large diameter part, the large diameter part includes a large diameter detection position one located at the highest position; the detection method is as follows: ① The spring body is conveyed until its axis coincides with the laser surface emitted by the laser emitting device, and the laser emitted by the laser emitting device hits the large diameter detection position one; ② The vision acquisition system acquires and analyzes the image of the large diameter detection position one hit by the laser, and obtains the height coordinates of the large diameter detection position one; ③ The collar rotates to drive the spring body to rotate, and records the height coordinates of the large diameter detection position one at multiple different points; ④ The average value of the height values of the large diameter detection position one is taken as the measured height value of the large diameter detection position one; ⑤ The measured height value of the large diameter detection position one is compared with that of a standard part to determine whether it is qualified.
[0011] The present invention is further configured such that the laser emitted by the laser emitting device is a vertical surface.
[0012] The present invention is further configured such that the large-diameter section also includes a second large-diameter detection position, which is located at the lowest position of the large-diameter section. After the laser emitted by the laser emitting device hits the second large-diameter detection position, the height coordinates of the second large-diameter detection position are acquired by the vision acquisition system. The height difference between the first large-diameter detection position and the second large-diameter detection position is added to the diameter of the large-diameter section to obtain the absolute diameter value of the large-diameter section. The absolute diameter value is then compared with the calibrated diameter to determine whether it is qualified.
[0013] The present invention is further configured such that the absolute diameter value is obtained by averaging multiple measurements, and the points of the multiple measurements are obtained by rotating the spring body in step ③.
[0014] In summary, the present invention has the following beneficial effects:
[0015] The V-shaped block positions the spring body, and the V-shaped block magnetically attracts the spring body to form a position. The rotation of the collar causes the spring body to rotate, so that the position of the high point detection position on the axial direction of the spring body changes, and the height coordinates of multiple different points are recorded, thereby improving the measurement accuracy. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the detection of the spring body in the embodiment;
[0017] Figure 2 This is a schematic diagram of the detection device in the embodiment;
[0018] Figure 3 This is a front view of the detection position in the detection device in the embodiment;
[0019] Figure 4 This is a top view of the positioning base and insert plate in the embodiment;
[0020] Figure 5 for Figure 3 Enlarged view of point A in the middle;
[0021] Figure 6 This is a partial rear view of the detection position in the detection device in the embodiment;
[0022] Figure 7 for Figure 6 Enlarged view of point B in the middle;
[0023] Figure 8 This is a schematic diagram of the rotation of the hanging plate in the embodiment;
[0024] Figure 9 This is a schematic diagram of the rotation of the collar in the embodiment;
[0025] Figure 10 This is a diagram showing one position of the fixed column moving upwards in the embodiment.
[0026] Reference numerals: Spring body 1, Small diameter section 11, Small diameter detection position one 111, Small diameter detection position two 112, Large diameter section 12, Large diameter detection position one 121, Large diameter detection position two 122, Conveyor rail 2, Laser emitting device 3, Vision acquisition system 31, Conveyor seat 4, Base 41, Slide rail 411, Baffle one 412, Fixing block 413, Spring seat 414, Spring 415, Positioning seat 5, Positioning surface 51, Extension plate 52, Groove 521, Insert plate 6, Fixing column 61, Shaft 62, Fixing sleeve 621, Fixing shaft 622, Collar 623, Hanging plate 63, Fixing plate 7, Limiting groove 71, Groove one 711, Groove two 712, Baffle two 72, Rod body 8, Boss 81, Limiting block 82, Cam 9, Rotating shaft 91. Detailed Implementation
[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0028] This embodiment discloses a spring detection device, which uses a laser emitting device 3 and a vision acquisition system 31 to detect the spring body 1. Figure 2 As shown, the detection device includes a conveyor track 2, with multiple conveyor seats 4 mounted on the upper end of the conveyor track 2. The conveyor seats 4 are transported from left to right in the direction of the arrow, and each conveyor seat 4 is equipped with a spring body 1. The laser emitting device 3 and the visual acquisition system 31 are both positioned above the conveyor seats 4.
[0029] Combination Figure 2 , Figure 3 The conveyor seat 4 includes a base 41, with a slide rail 411 mounted on its upper end. A positioning seat 5 is slidably connected to the slide rail 411 and can move left and right. Specifically, a rod 8 is slidably connected to the inner wall of the positioning seat 5 and can move left and right. The rod 8 includes a boss 81 that abuts against the left end of the positioning seat 5. A spring 415 is fitted on the right side of the rod 8, with one end abutting against the right end of the positioning seat 5 and the other end abutting against a fixing block 413. The detection device includes a cam 9, with a rotating shaft 91 mounted on it. The rotating shaft 91 is driven to rotate by a motor, causing the cam 9 to rotate along its own axis. The cam 9 is located on the left side of the rod 8, and its outer wall can push the rod 8 to the right when it rotates. A spring seat 414 is mounted on the left side of the fixing block 413, and the right side of the spring 415 is inserted into the spring seat 414 to form a limit.
[0030] The base 41 is equipped with a baffle 412, and the left side of the rod 8 is equipped with a limit block 82. When the rod 8 is in the left extreme position, the baffle 412 abuts against the left end of the limit block 82.
[0031] like Figure 3 , Figure 4 As shown, the positioning base 5 includes two V-shaped positioning surfaces 51. The positioning surfaces 51 are magnetic, and the outer periphery of the spring body 1 is positioned by magnetic attraction through the two positioning surfaces 51.
[0032] like Figure 3 , Figure 6As shown, a fixing plate 7 is fixedly installed on the base 41. The fixing plate 7 has a limiting groove 71 that passes through the fixing plate 7. The limiting groove 71 is an annular groove and includes a groove 711 extending in the left-right direction and a groove 712 extending in the up-down direction. To be precise, the groove 711 is a straight groove arranged horizontally, and the groove 712 is an arc-shaped groove. There are two grooves 711 arranged vertically and horizontally, and two grooves 712 arranged horizontally. The two grooves 711 are connected through the groove 712 and form an ellipse.
[0033] like Figure 6 As shown, the fixing plate 7 is equipped with a second baffle 72, which is located below the limiting groove 71.
[0034] The positioning base 5 is equipped with a mounting plate 6. The mounting plate 6 moves left and right synchronously with the positioning base 5, and the mounting plate 6 can also move up and down. Specifically, as follows... Figure 3 , Figure 4 As shown, the positioning base 5 is equipped with an extension plate 52, the extension plate 52 has a groove 521, the insertion plate 6 is inserted into the groove 521, and the insertion plate 6 can move up and down along the inner wall of the groove 521. Figure 3 (Directions shown).
[0035] Combination Figure 3 , Figure 6 The insert plate 6 is fixedly installed with a fixing post 61. The fixing post 61 is a long rod structure. The fixing post 61 passes through the insert plate 6 and is inserted into the limiting groove 71. The fixing post 61 can move circumferentially along the inner wall of the limiting groove 71.
[0036] like Figure 5 As shown, a fixed column 61 is rotatably connected to a shaft 62, which passes through the fixed column 61 and is capable of rotating along its own axis. Figure 5 , Figure 7 A fixed sleeve 621 is installed at one end of the shaft 62, and a fixed shaft 622 is installed on the fixed sleeve 621. The fixed shaft 622 is a long rod and passes through the spring body 1 and the two small diameter portions 11. A collar 623 is installed on the fixed shaft 622. The collar 623 is a cylindrical structure and made of elastic material, such as sponge. When the collar 623 is in the lower limit position, the collar 623 abuts against the bottom inner wall of the small diameter portion 11. The collar 623 touches the bottom inner wall of the small diameter portion 11 lightly to ensure that the small diameter portion 11 does not deform much. At the same time, there is a contact force between the collar 623 and the bottom inner wall of the small diameter portion 11. When the collar 623 rotates, it can drive the small diameter portion 11 to deflect at an angle.
[0037] like Figure 6As shown, a hanging plate 63 is installed at the other end of the shaft 62. The hanging plate 63 rotates synchronously with the shaft 62, that is, the hanging plate 63 rotates synchronously with the ring 623. In the initial state, the insert plate 6 is located at the lower limit position, the fixing post 61 is located at the left end of the groove 1 711, the hanging plate 63 is set vertically, the bottom right end of the hanging plate 63 abuts against the left end of the baffle 2 72, and the lower end of the collar 623 abuts against the bottom inner wall of the small diameter part 11. When the insert plate 6 moves to the right, the fixing post 61 moves to the right along the groove 1 711. Since the bottom right end of the hanging plate 63 is blocked by the baffle 2 72, the hanging plate 63 rotates, and the rotation of the hanging plate 63 drives the collar 623 to rotate. The collar 623 drives the small diameter part 11 to rotate through friction, so that the position of the highest point of the top of the spring body 1 changes axially. At the same time, the height coordinates of the highest position point are recorded by the laser emitting device 3 and the vision acquisition system 31 for measurement purposes.
[0038] like Figure 9 As shown, after the collar 623 drives the small diameter portion 11 to rotate through friction, the collar 623 disengages from the inner wall of the small diameter portion 1. Figure 8 As shown, when the fixing post 61 moves to the rightmost position of slot two 712, the insert plate 6 will move to the left and drive the fixing post 61 to the left. Under the upward inertia, the fixing post 61 will be inserted into the upper annular groove of slot two 712 and finally enter the slot one 711 located above. At this time, as Figure 10 As shown, the collar 623 is located above the inner wall of the bottom of the small diameter portion 11. When the fixing post 61 moves to the left to the slot 712 on the left side, the insert plate 6 falls down due to gravity, the fixing post 61 falls down at the same time, and the collar 623 falls back to... Figure 5 state.
[0039] like Figure 1 As shown, this embodiment also discloses a detection method. The spring body 1 is horizontally mounted on the positioning seat 5. The spring body 1 includes a large-diameter portion 12 and small-diameter portions 11 located at both ends in the axial direction. The large-diameter portion 12 is helical, and the small-diameter portions 11 are annular structures. The large-diameter portion 12 is located between the two small-diameter portions 11. The diameter of the large-diameter portion 12 is denoted as D1, and the diameter of the small-diameter portion 11 is denoted as D2.
[0040] The large-diameter section 12 includes a large-diameter detection position 121 located at the highest position. The specific method for detecting the height of the large-diameter detection position 121 is as follows:
[0041] ① The laser surface emitted by the laser emitting device 3 is a vertical surface. The spring body 1 is transmitted to the point where its axis coincides with the laser surface emitted by the laser emitting device 3, and the laser emitted by the laser emitting device 3 hits the large diameter detection position 121.
[0042] ② The vision acquisition system 31 acquires and analyzes the image of the large-diameter detection position 121 being hit by the laser, and obtains the height coordinates of the large-diameter detection position 121.
[0043] ③ The cam 9 drives the rod 8 to move to the right, and the fixed column 61 moves to the right along the groove 711. Since the bottom right end of the hanging plate 63 is blocked by the baffle 72, the hanging plate 63 rotates, and the rotation of the hanging plate 63 drives the collar 623 to rotate. The collar 623 drives the small diameter part 11 to rotate through friction, so that the position of the highest point of the top of the spring body 1 changes axially.
[0044] When the fixing post 61 moves to the rightmost position of slot two 712, the insert plate 6 will move to the left, causing the fixing post 61 to move to the left as well. Under the upward inertia, the fixing post 61 will engage with the upper annular groove of slot two 712 and eventually enter slot one 711 located above. At this time, if... Figure 10 As shown, the collar 623 is located above the inner wall of the bottom of the small diameter portion 11. When the fixing post 61 moves to the left to the slot 712 on the left side, the insert plate 6 falls down due to gravity, the fixing post 61 falls down at the same time, and the collar 623 falls back to... Figure 5 state.
[0045] Repeat this step and record the height coordinates of the large diameter detection position 121 at multiple different points.
[0046] ④ Take the average value of the height values of the large diameter detection position 121 as the measured height value of the large diameter detection position 121.
[0047] ⑤ Compare the measured height value of the large diameter detection position 121 with the measured height value of the standard part to determine whether it is qualified.
[0048] The above detection is a relative comparison method. This embodiment also discloses the following detection method, which mainly improves step ①. The large diameter part 12 also includes a large diameter detection position 2 122. The large diameter detection position 2 122 is located at the lowest position of the large diameter part 12. After the laser emitted by the laser emitting device 3 hits the large diameter detection position 2 122, the height coordinate of the large diameter detection position 2 122 is acquired by the vision acquisition system 31. The height difference between the large diameter detection position 1 121 and the large diameter detection position 2 122 is added to the diameter of the large diameter part 12 to obtain the absolute diameter value of the large diameter part 12. The absolute diameter value is compared with the calibrated diameter to determine whether it is qualified.
[0049] The absolute diameter value is obtained by averaging multiple measurements, and the measurement points are obtained by rotating spring body 1 in step ③.
[0050] like Figure 1 As shown, the small diameter section 11 includes a small diameter detection position 111 located at a high point and a small diameter detection position 112 located at a low point. Both the small diameter detection position 111 and the small diameter detection position 112 can be detected by the two detection methods described above.
[0051] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.
Claims
1. A spring detection device, which uses a laser emitting device (3) and a vision acquisition system (31) to detect a spring body (1), characterized in that, The spring body (1) includes a positioning seat (5), which includes two V-shaped positioning surfaces (51). The positioning surfaces (51) are magnetic, and the spring body (1) is positioned by magnetic attraction through the two positioning surfaces (51). The detection device also includes a fixing plate (7), the fixing plate (7) is provided with a limiting groove (71), the limiting groove (71) is an annular groove, the limiting groove (71) includes a groove one (711) extending in the left and right direction and a groove two (712) extending in the up and down direction, the fixing plate (7) is equipped with a baffle two (72), the baffle two (72) is located below the limiting groove (71); The positioning seat (5) can move left and right. The positioning seat (5) is equipped with a plug plate (6). The plug plate (6) moves left and right synchronously with the positioning seat (5) and can move up and down. The plug plate (6) is fixedly equipped with a fixing post (61). The fixing post (61) passes through the plug plate (6) and is inserted into the limiting groove (71). The fixing post (61) can move circumferentially along the inner wall of the limiting groove (71). The fixing post (61) is rotatably connected to a shaft (62). The shaft (62) passes through the fixing post (61). The shaft (62) can rotate along its own axis. The spring body (1) includes small diameter portions (11) located at both ends of the axial direction. The shaft (62) is equipped with a collar (623) at one end of the axial direction and a hanging plate (63) at the other end. In the initial state, the insert plate (6) is located at the lower limit position, the fixing post (61) is located at the left end of the first groove (711), the hanging plate (63) is vertically set, the bottom right end of the hanging plate (63) abuts against the left end of the second baffle (72), and the lower end of the collar (623) abuts against the bottom inner wall of the small diameter part (11). When the insert plate (6) moves to the right, the hanging plate (63) rotates and drives the collar (623) to rotate. The collar (623) drives the small diameter part (11) to rotate through friction, so that the position of the highest point of the top of the spring body (1) changes axially.
2. The spring detection device according to claim 1, characterized in that, The bottom of the positioning seat (5) is equipped with a slide rail (411), and the positioning seat (5) can slide left and right along the slide rail (411). The inner wall of the positioning seat (5) is slidably connected to a rod (8), and the rod (8) can move left and right. The rod (8) includes a boss (81), which abuts against the left end of the positioning seat (5). The rod (8) is fitted with a spring (415), one end of which abuts against the right end of the positioning seat (5), and the other end abuts against a fixing block (413). The detection device includes a cam (9), which is rotatable along its own axis. The cam (9) is located on the left side of the rod (8). When the cam (9) rotates, its outer wall can push the rod (8) to the right.
3. The spring detection device according to claim 2, characterized in that, The detection device includes a baffle (412), and a limit block (82) is installed on the rod (8). When the rod (8) is in the left extreme position, the baffle (412) abuts against the left end of the limit block (82).
4. The spring detection device according to claim 1, characterized in that, The positioning seat (5) is equipped with an extension plate (52), the extension plate (52) is provided with a groove (521), the insert plate (6) is inserted into the groove (521), and the insert plate (6) can move up and down along the inner wall of the groove (521).
5. A spring detection device according to claim 1, characterized in that, The detection device includes a conveyor track (2), a conveyor seat (4) is installed on the conveyor track (2), a base (41) is installed on the conveyor seat (4), and the positioning seat (5) is slidably connected to the upper end of the base (41).
6. A spring detection device according to claim 1, characterized in that, The collar (623) passes through the two small diameter portions (11).
7. A spring detection method, using the spring detection device according to any one of claims 1-6, characterized in that, The spring body (1) is arranged horizontally along the axis. The spring body (1) includes a large diameter portion (12), and the large diameter portion (12) includes a large diameter detection position (121) located at the highest position. The detection method is as follows: ① The spring body (1) is transmitted to a point where its axis coincides with the laser surface emitted by the laser emitting device (3), and the laser emitted by the laser emitting device (3) hits the large-diameter detection position (121); ②The visual acquisition system (31) acquires and analyzes the image of the large-diameter detection position (121) being hit by the laser, and obtains the height coordinates of the large-diameter detection position (121); ③ The collar (623) rotates repeatedly, causing the spring body (1) to rotate repeatedly, and the height coordinates of the large diameter detection position (121) at multiple different points are recorded; ④ Take the average value of the height values of the first large-diameter detection position (121) as the measured height value of the first large-diameter detection position (121); ⑤ Compare the measured height value of the large diameter detection position (121) with the standard part to determine whether it is qualified.
8. A spring detection method according to claim 7, characterized in that, The laser emitted by the laser emitting device (3) is a vertical surface.
9. A spring detection method according to claim 7, characterized in that, The large-diameter section (12) also includes a large-diameter detection position two (122). The large-diameter detection position two (122) is located at the lowest position of the large-diameter section (12). After the laser emitted by the laser emitting device (3) hits the large-diameter detection position two (122), the height coordinates of the large-diameter detection position two (122) are acquired by the vision acquisition system (31). The height difference between the large-diameter detection position one (121) and the large-diameter detection position two (122) is added to the diameter of the large-diameter section (12) to obtain the absolute diameter value of the large-diameter section (12). The absolute diameter value is compared with the calibrated diameter to determine whether it is qualified.
10. A spring detection method according to claim 7, characterized in that, The absolute diameter value is obtained by averaging multiple measurements, and the measurement points are obtained by rotating the spring body (1) in step ③.