Stamping part machining flatness detection equipment

Abstract

The present application relates to the technical fields of flatness laser detection, in particular to a stamping part processing flatness detection equipment; it includes laser detection box and the support setting of conveying frame below the laser detection box; the left and right ends of conveying frame are connected with conveying belt through conveying roller transmission; one of the conveying rollers is driven by motor; the lower surface of laser detection box and the upper surface of conveying belt are left with conveying gap; the inside of laser detection box is provided with laser head along the front and back direction; the front and back ends of conveying gap are provided with side plate which is fixed with laser detection box; the side groove is provided through the left and right sides of side plate; the left and right ends of side groove are expanded; the present application cooperates with positioning seat, elastic positioning strip and positioning spring, so as to adapt to the irregular bottom of special-shaped stamping part, effectively fit and support workpiece, and avoid workpiece suspension deviation, so as to protect the flatness of stamping part and laser detection precision.

Description

Technical Field

[0001] This invention relates to the field of laser flatness testing technology, specifically to a flatness testing device for stamped parts. Background Technology

[0002] Stamped parts are fundamental components in machinery manufacturing, automobiles, and hardware processing. After being formed by stamping, they are prone to defects such as warping and unevenness due to factors such as stamping pressure, mold precision, and material deformation. If unqualified stamped parts flow into the assembly process, they will directly affect the assembly accuracy and overall performance of the product. Therefore, flatness testing must be performed on stamped parts after processing. Currently, the mainstream testing method in the industry is laser testing. This method relies on a conveyor belt to transport the workpiece to the laser testing instrument. The laser head emits a laser and receives the reflected laser. Based on the time data of laser emission and reception, the spatial position of each testing point on the stamped part is calculated. By comparing whether each point is on the same horizontal plane or the same straight line, the flatness of the stamped part can be accurately determined. It has the advantages of non-contact, high testing efficiency, and excellent accuracy, and is widely used in batch testing of stamped parts.

[0003] For stamped parts with irregular or irregular bottom structures, the conveyor belt does not have an effective support and positioning structure that fits against the bottom of the stamped part during the process of transporting the stamped part and passing through the laser head. This causes the stamped part to be prone to problems such as displacement, shaking, and micro-jumping. The poor positioning stability of the workpiece results in deviations in laser ranging and plane fitting data, which greatly reduces the accuracy of the flatness detection of the stamped part and makes it difficult to meet the batch inspection requirements of high-precision stamped parts. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention proposes a flatness testing device for stamped parts. This invention uses a positioning seat, an elastically extendable positioning strip, and a positioning spring to adaptively fit the irregular bottom of irregularly shaped stamped parts, effectively supporting the workpiece and preventing it from being suspended or shifting, thus ensuring the accuracy of laser testing for the flatness of stamped parts.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: A flatness testing device for stamped parts, comprising a laser testing box and a conveyor frame supported below the laser testing box; the left and right ends of the conveyor frame are connected to a conveyor belt via conveyor rollers; one of the conveyor rollers is driven by a motor; a conveying gap is left between the lower surface of the laser testing box and the upper surface of the conveyor belt; laser heads are spaced apart along the front-to-back direction on the inner side of the laser testing box; side plates fixed to the laser testing box are provided at the front and rear ends of the conveying gap; and the side plates are provided with a through-type... Side groove; the left and right ends of the side groove are expanded; the conveyor belt is uniformly and spacedly fixed to the positioning seats along the conveying direction; the length direction of the positioning seat is consistent with the width direction of the conveyor belt; the outer surface of the positioning seat is uniformly provided with positioning grooves along the length direction; the positioning groove is slidably connected to the positioning strip; the positioning strip is connected to the bottom of the positioning groove through the positioning spring; an L-shaped groove is provided on the rear side of the positioning seat; the L-shaped groove is elastically and slidably connected to the L-shaped strip; the inner wall of the positioning groove is provided with a pressure groove communicating with the L-shaped groove; a pressure block fixed to the L-shaped strip is slidably connected in the pressure groove.

[0006] Preferably, the two L-shaped grooves are symmetrically arranged at the front and rear ends of the positioning seat; the two L-shaped grooves are interconnected; and the ends of the two L-shaped strips are connected by a strip spring.

[0007] Preferably, an arc-shaped seat is fixedly attached to the inner side of the laser detection box; the upper and lower ends of the arc-shaped seat are vertically offset; the upper end of the arc-shaped seat is positioned to the right relative to the lower end of the arc-shaped seat; a downward-facing laser head is fixedly attached to the upper position of the inner side of the arc-shaped seat; an arc-shaped groove is provided at the lower end of the arc-shaped seat; multiple arc-shaped strips are movably connected within the arc-shaped groove; the arc-shaped strips are connected to the bottom of the arc-shaped groove via arc-shaped springs; the multiple arc-shaped strips are evenly arranged and distributed in the front-back direction and are in contact with each other; a trigger plate is fixedly attached to the lower end of each arc-shaped strip; the lower end of the trigger plate is lower than the upper end of the untriggered positioning strip in the vertical direction; the lower end of the trigger plate is higher than the upper end of the triggered positioning strip in the vertical direction; the lower end of the trigger plate is higher than the upper surface of the placed workpiece in the vertical direction; the height of the arc-shaped seat and the arc-shaped strips is higher than the conveying gap.

[0008] Preferably, the positioning strip is n-shaped; the bottom of the positioning groove is provided with a clearance hole for the end of the positioning strip to pass through; one end of the positioning spring is connected to the inner side of the positioning strip, and the other end is connected to the bottom of the positioning groove and is offset from the clearance hole.

[0009] Preferably, the pressure block is composed of a pressing part and a fixing part; the fixing part is fixedly connected to the L-shaped strip; the fixing part is provided with a pressing groove on the side facing the corresponding positioning strip; the pressing part of the pressure block is slidably connected in the pressing groove; the pressing part is connected to the bottom of the pressing groove through a pressing spring; the upper surface of the pressing part is flush with the lower end of the untriggered positioning strip.

[0010] Preferably, the inner wall of the side groove is rotatably connected to a side roller; the outer wall of the side roller is driven to connect to a lateral belt; the end of the lateral belt is arc-shaped; and the distance between the two lateral belts is greater than the distance between the two side plates.

[0011] Preferably, the outer wall of the lateral belt is fixedly connected to the spacer along the transmission direction; the distance between two adjacent spacers is the same as the distance between two adjacent positioning seats.

[0012] Preferably, the inner wall of the arc-shaped groove near the opening is provided with a delay groove facing outward; a delay strip is slidably connected in the delay groove; the delay groove extends outward and is threadedly connected to a bolt; the bolt is rotatably connected to the delay strip.

[0013] Preferably, the inner wall of the conveyor belt is uniformly provided with toothed grooves; the outer wall of the conveyor roller is uniformly provided with teeth that engage with the toothed grooves; the front and rear outer walls of the positioning strip and the side of the pressure block facing the positioning strip are all provided with anti-slip features; a second contactor is provided on the side of the trigger plate facing the positioning seat, and a first contactor corresponding to the second contactor is provided at the lower end of the positioning seat.

[0014] The beneficial effects of this invention are as follows: 1. This invention uses a positioning seat, an elastically retractable positioning strip, and a positioning spring to adaptively fit the irregular bottom of the irregularly shaped stamped part, effectively supporting the workpiece and preventing it from being suspended or shifting, thus ensuring the accuracy of laser detection of the flatness of the stamped part.

[0015] 2. This invention uses an n-shaped positioning bar, a clearance hole structure, an arc-shaped seat, and an elastic trigger structure to adaptively distinguish between the workpiece detection area and the empty area, automatically filter invalid detection data, and thus avoid interference from invalid data, thereby greatly improving the accuracy and effectiveness of flatness detection of stamped parts.

[0016] 3. In this invention, the end of the L-shaped strip will contact the side roller and lateral belt that are rotatably installed inside the side groove and drive the lateral belt synchronously by relying on friction. This can effectively avoid direct rigid contact friction between the L-shaped strip and the side groove wall, and greatly reduce sliding wear and transmission resistance. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a perspective view of the present invention; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 yes Figure 1 Enlarged view of point B in the middle; Figure 4 This is a partial sectional view of the present invention; Figure 5 yes Figure 4 Enlarged view of point C in the middle; Figure 6 yes Figure 4 Enlarged view at point D; Figure 7 This is a perspective view of the laser detection box in this invention; Figure 8 This is a perspective view of the lateral band in this invention; Figure 9 This is a perspective view of the positioning strip and the L-shaped strip in this invention; Figure 10 This is a cross-sectional view of the positioning seat in this invention; Figure 11 This is a schematic diagram of the pressing part and the fixing part in this invention.

[0019] In the diagram: Laser detection box 1, conveying gap 11, conveying frame 2, conveying roller 21, conveying belt 22, motor 23, toothed groove 24, tooth 25, arc-shaped seat 3, laser head 31, arc-shaped groove 32, arc-shaped strip 33, arc-shaped spring 34, trigger plate 35, delay groove 36, delay strip 37, bolt 38, side plate 4, side groove 41, side roller 42, lateral belt 43, partition block 44, positioning seat 5, positioning groove 51, positioning strip 52, positioning spring 53, L-shaped groove 54, L-shaped strip 55, pressure groove 56, pressure block 57, pressing part 571, fixing part 572, pressing groove 573, pressing spring 574, strip spring 58, clearance hole 59, second contactor 6, first contactor 61. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0021] like Figures 1 to 11 As shown, the present invention includes the following embodiments: Example 1: A flatness testing device for stamped parts includes a laser testing box 1 and a conveyor frame 2 supported below the laser testing box 1; the left and right ends of the conveyor frame 2 are connected to a conveyor belt 22 via conveyor rollers 21; one of the conveyor rollers 21 is driven by a motor 23; a conveying gap 11 is left between the lower surface of the laser testing box 1 and the upper surface of the conveyor belt 22; laser heads 31 are spaced along the front-back direction on the inner side of the laser testing box 1; side plates 4 are fixed to the laser testing box 1 at the front and rear ends of the conveying gap 11; side grooves 41 are provided through the side plates 4 on the left and right sides; the left and right ends of the side grooves 41 are expanded. The conveyor belt 22 is uniformly and intermittently fixed to the positioning seats 5 along the conveying direction; the length direction of the positioning seats 5 is consistent with the width direction of the conveyor belt 22; the outer surface of the positioning seats 5 is uniformly provided with positioning grooves 51 along the length direction; the positioning grooves 51 are slidably connected to the positioning strips 52; the positioning strips 52 are connected to the bottom of the positioning grooves 51 by positioning springs 53; an L-shaped groove 54 is provided on the rear side of the positioning seats 5; the L-shaped groove 54 is elastically and slidably connected to the L-shaped strips 55; the inner wall of the positioning groove 51 is provided with a pressure groove 56 communicating with the L-shaped groove 54; a pressure block 57 fixed to the L-shaped strips 55 is slidably connected in the pressure groove 56.

[0022] In this embodiment, the two L-shaped grooves 54 are symmetrically arranged at the front and rear ends of the positioning seat 5; the two L-shaped grooves 54 are interconnected; and the ends of the two L-shaped bars 55 are connected by a bar spring 58.

[0023] After the stamping process is completed, the worker places it on the positioning seat 5 of the conveyor belt 22. The length direction of the positioning seat 5 is the width direction of the conveyor belt 22. Multiple positioning strips 52 in the length direction are squeezed by the bottom of the stamped part and retract into the positioning groove 51 to overcome the elastic force of the positioning spring 53. The positioning strips 52 that are not squeezed remain in the initial state, which is adapted to the bottom structure of the irregularly shaped stamped part. The bottom of the stamped part is supported by the reaction force of the positioning spring 53. Then the motor 23 drives the conveyor roller 21 to rotate, which drives the conveyor belt 22 to transport smoothly from left to right. In order to improve the transmission anti-slip performance between the conveyor roller 21 and the conveyor belt 22, corresponding meshing teeth 25 and tooth grooves 24 are provided on the inner side of the conveyor belt 22 and the outer side of the conveyor roller 21. The positioning seat 5 carrying the stamped part enters the conveying gap 11 between the laser detection box 1 and the conveyor belt 22 with the conveyor belt 22 and gradually enters the detection area between the two side plates 4.

[0024] The L-shaped strips 55, symmetrically arranged at the front and rear ends of the positioning seat 5, are guided into the side groove 41 of the side plate 4 by the expanding ends of the side groove 41. The groove wall of the side groove 41 presses the L-shaped strips 55, causing them to slide elastically inward along the L-shaped groove 54. During the sliding process, the pressure block 57 fixed to it slides along the pressure groove 56, pressing the corresponding retracted positioning strip 52. At the same time, anti-slip grooves can be provided on the contact surface between the positioning strip 52 and the pressure block 57 to increase the friction of the contact surface, thereby locking and fixing the positioning strip 52 and preventing the positioning strip 52 from moving vertically during the testing process. Simultaneously, the two sets of symmetrical L-shaped strips 55 are simultaneously inserted into the side groove 41, and the side groove 41 presses against the L-shaped strips 52. The L-shaped strip 55 forms a vertical limit, which, together with the strip spring 58 between the ends of the two L-shaped strips 55, further improves the overall structural stability and prevents the positioning seat 5 from fluctuating up and down or shifting left and right. At this time, the stamped part is stably supported and positioned without shaking or slight jumping, and is smoothly transported to the bottom of the laser inspection box 1. The laser heads 31 arranged at intervals inside the laser inspection box 1 emit lasers. Multiple sets of laser heads 31 are in the same straight line and emit laser beams. The laser irradiates the upper surface of the stamped part and receives the reflected laser. The spatial position of each inspection point is calculated by measuring the laser transmission and reception time data, and the position of each point is compared to see if they are in the same straight line. This completes the flatness data collection and qualification judgment of the stamped part.

[0025] After the inspection is completed, the positioning seat 5 continues to be conveyed to the right along the conveyor belt 22. The L-shaped strip 55 gradually moves out of the side groove 41. The external extrusion pressure disappears, and the elastic structure of the strip spring 58 and the L-shaped groove 54 drives the L-shaped strip 55 to reset. This causes the pressure block 57 to move away from the positioning strip 52, releasing the pressure and locking of the positioning strip 52. After the stamped part is removed, the positioning spring 53 pushes the positioning strip 52 to reset outward. All positioning strips 52 return to a uniform height, and the equipment can continue to carry out the next batch of stamped part inspection operations.

[0026] The present invention uses a positioning seat 5, an elastically retractable positioning strip 52 and a positioning spring 53 to cooperate in order to adaptively fit the irregular bottom of the irregular stamped part, effectively fit and support the workpiece, thereby avoiding the workpiece from being suspended and shifting, and ensuring the accuracy of laser detection of the flatness of the stamped part.

[0027] The present invention uses a front and rear symmetrical L-shaped limiting structure, a bar spring 58 and a side groove 41 to lock the positioning bar 52 and limit the positioning seat 5. This ensures that the transmission belt will not shake during transmission, and that the positioning bar 52 is clamped in both directions, making the stamped part more stable.

[0028] Example 2: An arc-shaped seat 3 is fixedly attached to the inner side of the laser detection box 1; the upper end and the lower end of the arc-shaped seat 3 are vertically offset; the upper end of the arc-shaped seat 3 is positioned to the right relative to the lower end of the arc-shaped seat 3; a downward-facing laser head 31 is fixedly attached to the upper position of the inner side of the arc-shaped seat 3; an arc-shaped groove 32 is provided at the lower end of the arc-shaped seat 3; multiple arc-shaped strips 33 are movably connected within the arc-shaped groove 32; the arc-shaped strips 33 are connected to the bottom of the arc-shaped groove 32 by arc-shaped springs 34; multiple arc-shaped strips 33 are movably connected within the arc-shaped groove 32. The arc-shaped strips 33 are evenly arranged in the front-to-back direction and are in contact with each other; the lower end of the arc-shaped strips 33 is fixedly connected to the trigger piece 35; the lower end of the trigger piece 35 is lower than the upper end of the untriggered positioning strip 52 in the vertical direction; the lower end of the trigger piece 35 is higher than the upper end of the triggered positioning strip 52 in the vertical direction; the lower end of the trigger piece 35 is higher than the upper surface of the placed workpiece in the vertical direction; the height of the arc-shaped seat 3 and the arc-shaped strips 33 is higher than the conveying gap 11.

[0029] In this embodiment, the positioning strip 52 is n-shaped; the bottom of the positioning groove 51 is provided with a clearance hole 59 for the end of the positioning strip 52 to pass through; one end of the positioning spring 53 is connected to the inner side of the positioning strip 52, and the other end is connected to the bottom of the positioning groove 51 and is offset from the clearance hole 59.

[0030] In this embodiment, the n-shaped positioning strip 52 can achieve end-to-end extension and retraction through the clearance hole 59 at the bottom of the positioning groove 51. Combined with the staggered positioning spring 53, it achieves a long and stable elastic extension and retraction. When the stamped part is placed on the positioning seat 5, the pressed positioning strip 52 can move down smoothly and the end passes through the clearance hole 59, effectively reducing the height of the upper surface of the stamped part after placement. This makes the height of the upper surface of the stamped part lower than the height of the top of the unpressed positioning strip 52, leaving sufficient space for the stamped part. After locking, the positioning strip 52 carries the stamped part smoothly into the laser detection box 1 along with the conveyor belt 22. The staggered arc-shaped seat 3 inside the laser detection box 1 and the elastically arranged arc strip 33 and trigger piece 35 in the arc groove 32 at its bottom participate in the work simultaneously. The top of the positioning bar 52, which is not covered by the stamped part and remains in a high position, will contact and press against the trigger plate 35, causing the arc-shaped bar 33 to slide along the arc-shaped groove 32 against the elastic force of the arc-shaped spring 34. This blocks the detection space below the corresponding laser head 31 or triggers the corresponding laser head 31 to close, automatically filtering out invalid laser detection data from the high-positioned empty positioning bar 52. Meanwhile, the low-positioned positioning bar 52, which carries the stamped part, cannot contact the pressing trigger plate 35, and the corresponding laser head 31 remains in a normal working state, performing laser acquisition and detection only on the surface of the stamped part, accurately selecting the effective detection area. Furthermore, the stamped part can be placed arbitrarily in the width direction of the conveyor belt 22, which can trigger the corresponding laser head 31 to open and close invalid laser heads 31, making laser detection more accurate.

[0031] This invention uses the n-shaped positioning strip 52, the clearance hole 59 structure, the arc-shaped seat 3, and the elastic trigger structure to adaptively distinguish the workpiece detection area from the empty area, automatically filter invalid detection data, and thus avoid interference from invalid data, thereby greatly improving the accuracy and effectiveness of flatness detection of stamped parts.

[0032] Example 3: The pressure block 57 is composed of a pressing part 571 and a fixing part 572; the fixing part 572 is fixedly connected to the L-shaped strip 55; the fixing part 572 is provided with a pressing groove 573 on the side facing the corresponding positioning strip 52; the pressing part 571 of the pressure block 57 is slidably connected in the pressing groove 573; the pressing part 571 is connected to the bottom of the pressing groove 573 through a pressing spring 574; the upper surface of the pressing part 571 is flush with the lower end of the untriggered positioning strip 52.

[0033] When the positioning seat 5 carrying the stamped part moves into the side groove 41 of the side plate 4 along the conveyor belt 22, the side groove 41 squeezes the L-shaped strip 55, causing it to slide along the L-shaped groove 54. This, in turn, drives the pressure block 57, composed of the fixing part 572 and the pressing part 571, to move towards the positioning strip 52. The lower end of the pressure-bearing positioning strip 52, which carries the stamped part, moves downwards due to pressure, passing the position of the pressure block 57 in the vertical direction. The pressing part 571, after moving with the pressure block 57, directly contacts the front and rear side walls of the positioning strip 52. The pressing part 571, under the pressure of the positioning strip 52, overcomes the elastic force of the pressing spring 574 and contracts into the pressing groove 573, fitting and pressing against the fixing part 572, thus achieving the positioning of the workpiece-carrying positioning strip 52. The stable clamping and locking mechanism 2 is used for the empty positioning bar 52 that does not support the stamped part. The lower end of the bar is flush with the upper surface of the pressure block 57. The clamping part 571 moves with the pressure block 57 to the lower end of the empty positioning bar 52, forming a vertical downward limit on the empty positioning bar 52 to prevent it from accidentally moving downward. This achieves stable contact with the trigger piece 35. When the positioning seat 5 moves out of the side groove 41 with the conveyor belt 22, the L-shaped bar 55 resets and drives the pressure block 57 to reset as a whole. The clamping part 571 then releases the clamping and locking mechanism on the positioning bar 52 that supports the workpiece, and simultaneously disengages from the lower end of the empty positioning bar 52, releasing the limiting constraint on the empty positioning bar 52, thus completing a single locking and unlocking cycle.

[0034] The present invention uses a split pressure block 57, a pressure spring 574 and a pressure groove 573 to lock the load-bearing and empty positioning strip 52 differently, adapt to the workpiece under pressure deformation, and thus prevent the positioning strip 52 from moving abnormally, effectively improving the stability of stamping parts during inspection.

[0035] Example 4: The inner wall of the side groove 41 is rotatably connected to the side roller 42; the outer wall of the side roller 42 is driven to connect to the side belt 43; the end of the side belt 43 is arc-shaped; the distance between the two side belts 43 is greater than the distance between the two side plates 4.

[0036] In this embodiment, the outer wall of the lateral belt 43 is fixedly connected to the spacer 44 along the transmission direction; the distance between two adjacent spacers 44 is the same as the distance between two adjacent positioning seats 5.

[0037] When the positioning seat 5 is conveyed by the conveyor belt 22 and the L-shaped strip 55 enters the side groove 41 of the side plate 4, the end of the L-shaped strip 55 will contact the side roller 42 and the lateral belt 43 rotatably installed inside the side groove 41 and drive the lateral belt 43 synchronously by friction. This can effectively avoid direct rigid contact friction between the L-shaped strip 55 and the groove wall of the side groove 41, greatly reducing sliding wear and transmission resistance. At the same time, the partitions 44 evenly distributed on the outer wall of the lateral belt 43 can limit and isolate the end of a single L-shaped strip 55 between two adjacent partitions 44, effectively increasing the contact friction between the end of the lateral belt 43 and the end of the L-shaped strip 55. Through the limiting and supporting effect of the partitions 44, a reverse force is formed, so that the lateral belt 43, the L-shaped strip 55 and the positioning seat 5 maintain synchronous transmission, eliminating relative sliding, transmission lag or offset problems, and ensuring the consistency and stability of the overall conveying and positioning action of the equipment.

[0038] Example 5: The inner wall of the arc-shaped groove 32 near the groove opening is provided with a delay groove 36 facing outward; a delay strip 37 is slidably connected in the delay groove 36; the delay groove 36 extends outward and is threadedly connected to a bolt 38; the bolt 38 is rotatably connected to the delay strip 37.

[0039] According to the actual conveying speed of the conveyor belt 22, the operator can adjust the tightness of the delay bar 37 by rotating the bolt 38. Tightening the bolt 38 will push the delay bar 37 outward to increase the contact friction with the arc-shaped bar 33, while loosening the bolt 38 will reduce the frictional resistance between the delay bar 37 and the arc-shaped bar 33. Tightening the bolt 38 will increase the frictional resistance between the delay bar 37 and the arc-shaped bar 33. This allows for adjustable control of the reset speed and rebound sensitivity of the arc-shaped bar 33, ensuring that the reset speed of the arc-shaped bar 33 is adapted to the contact timing between the adjacent positioning bar 52 and the trigger plate 35. This is done as the conveyor belt 22 conveys the stamped parts into the laser inspection box 1. During the process, the empty positioning strip 52 that does not support the stamping part squeezes the trigger plate 35, causing the arc strip 33 to block the corresponding laser head 31. The frictional damping effect of the delay strip 37 can effectively delay the elastic return speed of the arc strip 33, so that before the arc strip 33 returns to its original position, the upper end of the next adjacent positioning strip 52 will contact the trigger plate 35 again, keeping the arc strip 33 blocking the corresponding laser head 31 in a normally closed state. If the positioning strip 52 that supports the stamping part passes the trigger plate 35, the trigger plate 35 can reset with the arc strip 33 without the squeezing of the upper end of the positioning strip 52, so that the laser head 31 is opened.

[0040] This invention uses the delay bar 37, the delay groove 36 and the adjusting bolt 38 to flexibly adjust the return damping and trigger sensitivity of the arc bar 33, adapt to different conveying speeds of the conveyor belt 22, and thus stably achieve the normal closure of the laser head 31 in the empty area and the normal opening of the laser head 31 in the workpiece area, eliminating detection errors under high-speed conveying conditions and greatly improving the accuracy of flatness detection.

[0041] Example 6: The conveyor belt 22, positioning seat 5, side belt 43, partition block 44 and other structures are all made of rigid materials; the inner wall of the conveyor belt 22 is uniformly provided with toothed grooves 24; the outer wall of the conveyor roller 21 is uniformly provided with teeth 25 that engage with the toothed grooves 24; the front and rear outer walls of the positioning strip 52 and the side of the pressure block 57 facing the positioning strip 52 are all provided with anti-slip features; the trigger plate 35 is provided with a second contactor 6 facing the positioning seat 5, and a first contactor 61 corresponding to the second contactor 6 is provided at the lower end of the positioning seat 5.

[0042] During equipment operation and testing, the outer teeth 25 of the conveyor roller 21 and the inner teeth 24 of the conveyor belt 22 precisely engage and mesh throughout the entire transmission process, replacing ordinary friction transmission. This effectively eliminates slippage, swaying, and uneven speed of the conveyor belt 22 under high-speed conveying and load fluctuation conditions, ensuring a constant and uniform conveying rhythm between the conveyor belt 22 and the positioning seat 5. Simultaneously, the contact surfaces between the front and rear outer walls of the positioning strip 52 and the pressure block 57 are treated with anti-slip material, significantly improving the frictional adhesion during clamping and locking, preventing slight slippage of the positioning strip 52 under force, and ensuring the stability of positioning and locking. As the positioning seat 5 enters the detection area of ​​the laser detection box 1 along with the conveyor belt 22, when the first contactor 61 of the positioning seat 5 and the second contactor 6 on the trigger plate 35 come into contact with each other, the circuit is turned on and the corresponding laser head 31 is triggered to start working, and laser detection is performed on the surface of the stamped part above. When the positioning seat 5 continues to convey and the first contactor 61 and the second contactor 6 separate and disconnect, the corresponding laser head 31 immediately turns off, realizing the linkage control effect of the laser head 31 accurately starting and stopping with the workpiece in place and automatically turning off when in an empty position.

[0043] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention. In addition, the terms "first," "second," "third," etc. are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of the present invention, "fixed connection" refers to a fixed connection. In the description of the present invention, "sliding connection" refers to a connection where the two parts can only slide and cannot be separated. Specifically, the groove can be set to be concave and the block can be set to be convex, and the specific design can be adjusted according to the actual situation. "Sliding fit" refers to a connection where the two parts can slide and separate. In the description of the present invention, "rotational connection" refers to a connection where the two parts can only rotate and cannot produce axial displacement. Specifically, an annular groove can be set on the inner wall of the hole, and a ring that is rotatably connected to the groove can be fixed to the outer wall of the shaft.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flatness testing device for stamped parts, comprising a laser testing box and a conveyor frame supported below the laser testing box; the left and right ends of the conveyor frame are connected to a conveyor belt via conveyor rollers; one of the conveyor rollers is driven by a motor; a conveying gap is left between the lower surface of the laser testing box and the upper surface of the conveyor belt; characterized in that: Laser heads are spaced out along the front-to-back direction inside the laser detection box; side plates are fixed to the laser detection box at the front and rear ends of the conveying gap; side grooves are provided through the side plates on both sides; the left and right ends of the side grooves are expanded; positioning seats are evenly and spacedly fixed to the conveyor belt along the conveying direction; the length direction of the positioning seat is consistent with the width direction of the conveyor belt; positioning grooves are evenly provided along the length direction on the outer surface of the positioning seat; positioning strips are slidably connected to the positioning grooves; the positioning strips are connected to the bottom of the positioning grooves by positioning springs; an L-shaped groove is provided on the rear side of the positioning seat; an L-shaped strip is elastically slidably connected to the L-shaped groove; a pressure groove communicating with the L-shaped groove is provided on the rearward side of the positioning groove; a pressure block fixed to the L-shaped strip is slidably connected in the pressure groove. An arc-shaped base is fixedly attached to the inner side of the laser detection box; the upper and lower ends of the arc-shaped base are vertically offset; the upper end of the arc-shaped base is positioned to the right relative to the lower end of the arc-shaped base; a downward-facing laser head is fixedly attached to the upper position of the inner side of the arc-shaped base; an arc-shaped groove is provided at the lower end of the arc-shaped base; multiple arc-shaped strips are movably connected within the arc-shaped groove; the arc-shaped strips are connected to the bottom of the arc-shaped groove via arc-shaped springs; the multiple arc-shaped strips are evenly arranged in the front-back direction and are in contact with each other; a trigger plate is fixedly attached to the lower end of each arc-shaped strip. The lower end of the trigger piece is lower than the upper end of the untriggered positioning strip in the vertical direction; the lower end of the trigger piece is higher than the upper end of the triggered positioning strip in the vertical direction; the lower end of the trigger piece is higher than the upper surface of the placed workpiece in the vertical direction; the height of the arc-shaped seat and the arc-shaped strip is higher than the conveying gap.

2. The stamping part flatness testing equipment according to claim 1, characterized in that: The two L-shaped grooves are symmetrically arranged at the front and rear ends of the positioning seat; the two L-shaped grooves are interconnected; and the ends of the two L-shaped bars are connected by a bar spring.

3. The stamping part flatness testing equipment according to claim 1, characterized in that: The positioning strip is n-shaped; the bottom of the positioning groove is provided with a clearance hole for the end of the positioning strip to pass through; one end of the positioning spring is connected to the inside of the positioning strip, and the other end is connected to the bottom of the positioning groove and is offset from the clearance hole.

4. The stamping part flatness testing equipment according to claim 1, characterized in that: The pressure block is composed of a pressing part and a fixing part; the fixing part is fixedly connected to the L-shaped strip; the fixing part is provided with a pressing groove on the side facing the corresponding positioning strip; the pressing part of the pressure block is slidably connected in the pressing groove; the pressing part is connected to the bottom of the pressing groove through a pressing spring; the upper surface of the pressing part is flush with the lower end of the untriggered positioning strip.

5. The stamping part flatness testing equipment according to claim 2, characterized in that: The inner wall of the side groove is rotatably connected to the side roller; the outer wall of the side roller is driven to connect to the lateral belt; the end of the lateral belt is arc-shaped; the distance between the two lateral belts is greater than the distance between the two side plates.

6. The stamping part flatness testing equipment according to claim 5, characterized in that: The outer wall of the lateral belt is fixedly connected to the spacer along the transmission direction; the distance between two adjacent spacers is the same as the distance between two adjacent positioning seats.

7. The stamping part flatness testing equipment according to claim 1, characterized in that: The inner wall of the arc-shaped groove near the opening is provided with a delay groove facing outward; a delay strip is slidably connected in the delay groove; the delay groove extends outward and is threadedly connected to a bolt; the bolt is rotatably connected to the delay strip.

8. The stamping part flatness testing equipment according to claim 4, characterized in that: The inner wall of the conveyor belt is uniformly provided with toothed grooves; the outer wall of the conveyor roller is uniformly provided with teeth that engage with the toothed grooves; the front and rear outer walls of the positioning strip and the side of the pressure block facing the positioning strip are all provided with anti-slip features; a second contactor is provided on the side of the trigger plate facing the positioning seat, and a first contactor corresponding to the second contactor is provided at the lower end of the positioning seat.

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