A printing press accessory laser detection device

Abstract

This invention discloses a laser inspection device for printing press parts, relating to the field of printing press parts manufacturing technology. It includes a tooling base plate and a laser inspection assembly. The laser inspection assembly is disposed below the tooling base plate and includes a cylinder bolted to the back end of the tooling base plate. A connecting plate is fixedly connected to the telescopic end of the cylinder, and a lifting rod is fixedly connected to the bottom end of the connecting plate. Gear rings are radially and evenly spaced along the middle of the lifting rod, and a prism is fixedly installed at the end of the lifting rod. This application utilizes a non-contact measurement scheme based on a laser displacement sensor. The laser displacement sensor measures the position of the inner wall of the roller, the prism changes the direction of the laser, and the host computer software processes and displays the data. Compared to traditional laser coaxial displacement gauges, the laser displacement sensor is not only lower in cost but also avoids physical contact with the inner wall of the roller throughout the measurement process, thus preventing contact damage.

Description

Technical Field

[0001] This invention relates to the field of printing press parts manufacturing technology, specifically a laser inspection device for printing press parts. Background Technology

[0002] In the field of printing machinery manufacturing, the precise measurement of the inner diameter of the roller is directly related to core performance indicators such as printing pressure uniformity and registration accuracy.

[0003] The measurement technologies commonly used in the industry have the following significant drawbacks: (1) Although mechanical contact measurement (such as micrometers and pneumatic measuring instruments) can achieve an accuracy of ±5μm, the physical contact between the measuring head and the inner wall of the roller can easily cause scratches on the chrome plating layer, and the single-point measurement takes as long as 3-5 minutes per piece; (2) Although existing non-contact solutions such as laser coaxial displacement gauges avoid contact damage, their complex optical path system leads to high equipment costs; (3) Traditional methods cannot simultaneously achieve 360° full circumference detection, requiring multiple clamping and positioning, resulting in a large cumulative error. Summary of the Invention

[0004] The purpose of this invention is to provide a laser inspection device for printing press parts to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a laser inspection device for printing press accessories, comprising a tooling base plate and a laser inspection component. The laser inspection component is disposed below the tooling base plate. The laser inspection component includes a cylinder bolted to the back end of the tooling base plate. A connecting plate is fixedly connected to the telescopic end of the cylinder, and a lifting rod is fixedly connected to the bottom end of the connecting plate. Gear rings are fixedly fixed radially at equal intervals in the middle of the lifting rod, and a prism is fixedly installed at the end of the lifting rod. Laser displacement sensors are fixedly installed on both sides of the lifting rod, and both laser displacement sensors are electrically connected to a host computer via signal cables.

[0006] Furthermore, the two laser displacement sensors are positioned side-by-side and perpendicular to both sides of the prism, and the laser beams emitted by the two laser displacement sensors are bent at a 90-degree angle to illuminate both sides of the inner wall of the roller.

[0007] Furthermore, a mounting plate is fixedly installed at one end of the tooling base plate, and a motor is bolted to the bottom of the mounting plate.

[0008] Furthermore, a drive pulley is fixedly connected to the rotating end of the motor, and a synchronous belt is sleeved on the outer circle of the drive pulley.

[0009] Furthermore, the synchronous belt has a driven pulley rotating at one end away from the drive pulley, and the driven pulley is rotatably mounted on the other end of the tooling base plate via a bottom slewing support.

[0010] Furthermore, a sleeve is coaxially connected to the bottom of the driven pulley, and the inner diameter of the sleeve is larger than the outer diameter of the lifting rod.

[0011] Furthermore, the sleeve is connected to a U-shaped plate at the end opposite to the driven pulley, and guide grooves are symmetrically opened on both sides of the top of the U-shaped plate.

[0012] Furthermore, a linkage assembly is provided inside the U-shaped plate recess. The linkage assembly includes a bidirectional lead screw rotatably mounted on the inner wall of the U-shaped plate recess, and the two sides of the bidirectional lead screw have opposite helical directions.

[0013] Furthermore, the linkage assembly also includes a gear coaxially fixed to the middle of the bidirectional lead screw, and the outer edge teeth of the gear mesh with a gear ring radially arranged in the middle of the lifting rod.

[0014] Furthermore, the linkage assembly also includes sliding sleeves threaded to both sides of the bidirectional lead screw. A guide rod is fixedly connected to the top of the sliding sleeve, and the two guide rods slide in cooperation with the corresponding guide grooves. A centering clamp is fixedly connected to the bottom of the sliding sleeve, and the "V" shaped notches of the two centering clamps are centered in cooperation with the outer wall of the roller.

[0015] This invention provides a laser inspection device for printing press parts, which has the following beneficial effects;

[0016] 1. This application is based on a non-contact measurement scheme using a laser displacement sensor. The laser displacement sensor is responsible for measuring the position of the inner wall of the drum, the prism is used to change the direction of the laser, and the host computer software is responsible for data processing and display. Compared with traditional laser coaxial displacement gauges, laser displacement sensors are not only cheaper, but also do not require physical contact with the inner wall of the drum during the entire measurement process, thus avoiding contact damage.

[0017] 2. In use, this application links the stroke of the lowering rod driven by the cylinder with the centering clamp on the outer wall of the drum. While driving the prism at the end of the lifting rod to penetrate into the drum component to be tested to measure its inner diameter, it also drives the sliding sleeves on both sides of the double-sided lead screw to close in opposite directions through the meshing of the gear teeth on the outer edge of the gear with the radially arranged gear ring in the middle of the lifting rod, thereby achieving centering and clamping of the outer wall of the drum.

[0018] 3. In use, due to the structural design where the inner diameter of the sleeve is larger than the outer diameter of the lifting rod, when the rotating end of the motor drives the driven pulley via the synchronous belt, the rotation of the U-shaped plate does not interfere with the lifting rod. This allows the roller component held by the centering plates on both sides inside the U-shaped plate recess to rotate under the motor drive. During this time, the prism and the two laser displacement sensors that work with it remain stationary, allowing for dynamic acquisition of the inner diameter roundness data of the roller component. Through multi-beam synchronous scanning and adaptive prism compensation technology, the equipment cost is reduced while supporting dynamic roundness analysis, which better reflects the circumferential uniformity of the roller component. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention;

[0020] Figure 2 This is a cross-sectional view of the device of the present invention;

[0021] Figure 3 This is a schematic cross-sectional view of the U-shaped plate structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the laser detection component structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the linkage component structure of the present invention;

[0024] Figure 6 This is a schematic diagram of light refraction in the laser displacement sensor of the present invention.

[0025] In the diagram: 1. Tooling base plate; 2. Laser detection assembly; 201. Cylinder; 202. Connecting plate; 203. Lifting rod; 204. Gear ring; 205. Prism; 206. Laser displacement sensor; 3. Mounting plate; 4. Motor; 5. Drive pulley; 6. Synchronous belt; 7. Driven pulley; 8. Slewing bearing; 9. Sleeve; 10. U-shaped plate; 11. Guide groove; 12. Linkage assembly; 1201. Bidirectional lead screw; 1202. Gear; 1203. Sliding sleeve; 1204. Guide rod; 1205. Centering clamp. Detailed Implementation

[0026] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0027] Please see Figures 3 to 4 The present invention provides a technical solution: a laser detection device for printing machine parts, including a tooling base plate 1 and a laser detection component 2. The laser detection component 2 is arranged below the tooling base plate 1. The laser detection component 2 includes a cylinder 201 bolted to the back end of the tooling base plate 1. A connecting plate 202 is fixedly connected to the telescopic end of the cylinder 201. A lifting rod 203 is fixedly connected to the bottom end of the connecting plate 202. A toothed ring 204 is fixedly fixed radially at equal intervals in the middle of the lifting rod 203. A prism 205 is fixedly installed at the end of the lifting rod 203. Laser displacement sensors 206 are fixedly installed on both sides of the lifting rod 203. Both laser displacement sensors 206 are electrically connected to the host computer through signal cables. The two laser displacement sensors 206 are parallel and perpendicular to the two sides of the prism 205. The laser beams emitted by the two laser displacement sensors 206 are bent at ninety degrees and irradiate the two sides of the inner wall of the roller.

[0028] The specific operation is as follows: the lifting rod 203 continues to descend, causing the prism 205 at its end to penetrate into the inside of the roller accessory to be tested. Two laser displacement sensors 206 are placed side by side and vertically illuminated on both sides of the prism 205. Then, the laser beams emitted by the two laser displacement sensors 206 are bent at ninety degrees and illuminate both sides of the inner wall of the roller. The inner diameter of the roller is obtained by adding the A value and B value collected by the two laser displacement sensors 206 to the fixed C value. This application is based on a non-contact measurement scheme of laser displacement sensor 206. In this scheme, laser displacement sensor 206 is responsible for measuring the position of the inner wall of the roller, prism 205 is used to change the direction of the laser, and host computer software is responsible for data processing and display. Compared with traditional laser coaxial displacement gauges, laser displacement sensor 206 is not only cheaper, but also does not require physical contact with the inner wall of the roller during the entire measurement process, thus avoiding contact damage.

[0029] Please see Figures 1 to 2 A mounting plate 3 is fixedly installed at one end of the tooling base plate 1, and a motor 4 is fixedly bolted to the bottom of the mounting plate 3. A drive pulley 5 is fixedly connected to the rotating end of the motor 4, and a synchronous belt 6 is sleeved on the outer circle of the drive pulley 5. The synchronous belt 6 rotates and drives a driven pulley 7 at one end away from the drive pulley 5. The driven pulley 7 is rotatably installed at the other end of the tooling base plate 1 through the bottom slewing bearing 8. A sleeve 9 is coaxially connected to the bottom of the driven pulley 7, and the inner diameter of the sleeve 9 is larger than the outer diameter of the lifting rod 203.

[0030] The specific operation is as follows: due to the structural setting that the inner diameter of the sleeve 9 is larger than the outer diameter of the lifting rod 203, when the rotating end of the motor 4 rotates through the synchronous belt 6 to the driven pulley 7, the rotation of the U-shaped plate 10 does not interfere with the lifting rod 203. This allows the roller accessory held by the centering clamps 1205 on both sides inside the notch of the U-shaped plate 10 to rotate under the drive of the motor 4. During this time, the prism 205 and the two laser displacement sensors 206 that cooperate with it remain stationary, so that the inner diameter roundness data of the roller accessory can be dynamically acquired. Through multi-beam synchronous scanning and adaptive prism 205 compensation technology, the equipment cost is reduced while supporting dynamic roundness analysis, which better reflects the circumferential uniformity of the roller accessory.

[0031] Please see Figures 5 to 6The sleeve 9 is connected to a U-shaped plate 10 at the end opposite to the driven pulley 7. The top of the U-shaped plate 10 has symmetrical guide grooves 11 on both sides. A linkage assembly 12 is installed inside the recess of the U-shaped plate 10. The linkage assembly 12 includes a bidirectional lead screw 1201 rotatably mounted on the inner wall of the recess of the U-shaped plate 10, with opposite helical directions on both sides. The linkage assembly 12 also includes a gear 1202 coaxially fixed to the middle of the bidirectional lead screw 1201, with the outer edge of the gear 1202... The gear teeth mesh with the radially arranged gear ring 204 in the middle of the lifting rod 203. The linkage assembly 12 also includes a sliding sleeve 1203 threadedly connected to both sides of the bidirectional lead screw 1201. The top of the sliding sleeve 1203 is fixedly connected to the guide rod 1204, and the two guide rods 1204 on both sides slide in cooperation with the corresponding guide grooves 11. The bottom of the sliding sleeve 1203 is fixedly connected to the centering clamp 1205, and the “V” shaped notches of the two centering clamps 1205 on both sides are centered in cooperation with the outer wall of the roller.

[0032] The specific operation is as follows: Place the roller accessory to be tested between the "V"-shaped notches of the centering clamps 1205 on both sides. Activate the cylinder 201 and pull the lifting rod 203 through the connecting plate 202, causing the lifting rod 203 to descend axially along the sleeve 9. During the descent of the lifting rod 203, the radially arranged gear ring 204 in its middle meshes with the outer edge teeth of the gear 1202, thereby driving the coaxial double-axis lead screws 1201 on both sides of the gear 1202 to rotate synchronously. Because the helical directions of the double-axis lead screws 1201 on both sides are opposite, the sliding sleeves 1203 on the double-axis lead screws 1201 on both sides drive the centering clamps 1205... The two sides of the cylinder 201 move towards each other and close together. Finally, the "V"-shaped notches of the centering clamps 1205 on both sides are used to center and clamp the outer wall of the drum. This application links the stroke of the lower lifting rod 203 driven by the cylinder 201 with the centering clamps 1205 on the outer wall of the drum. While driving the prism 205 at the end of the lifting rod 203 to penetrate into the drum part to be tested to measure its inner diameter, the outer edge teeth of the gear 1202 mesh with the toothed ring 204 radially arranged in the middle of the lifting rod 203 to drive the sliding sleeves 1203 on both sides of the double-acting screw 1201 to close together, thereby achieving centering and clamping of the outer wall of the drum.

[0033] In summary, when using this laser inspection device for printing press accessories:

[0034] First, the roller component to be tested is placed between the "V"-shaped notches of the centering clamps 1205 on both sides. The cylinder 201 is activated, and the lifting rod 203 is pulled via the connecting plate 202, causing the lifting rod 203 to descend axially along the sleeve 9. During the descent of the lifting rod 203, the radially arranged gear ring 204 in its middle meshes with the outer edge teeth of the gear 1202, thereby driving the coaxial double-axis lead screws 1201 on both sides of the gear 1202 to rotate synchronously. Because the helical directions of the double-axis lead screws 1201 on both sides are opposite, the sliding sleeves 1203 on the double-axis lead screws 1201 on both sides drive the centering clamps 1205. 5. The rollers are closed together and finally the outer wall of the roller is centered and clamped by the "V" shaped notches of the centering clamps 1205 on both sides. This application links the stroke of the lower lifting rod 203 driven by the cylinder 201 with the centering clamps 1205 on the outer wall of the roller. While the prism 205 at the end of the lifting rod 203 is driven to penetrate into the roller accessory to be tested to measure its inner diameter, the outer edge teeth of the gear 1202 mesh with the tooth ring 204 radially arranged in the middle of the lifting rod 203 to drive the sliding sleeves 1203 on both sides of the double-acting screw 1201 to close together, thereby achieving the centering and clamping of the outer wall of the roller.

[0035] Secondly, the lifting rod 203 continues to descend, causing the prism 205 at its end to penetrate deeper into the drum component to be tested. Two laser displacement sensors 206 are placed side by side and vertically illuminated on both sides of the prism 205. The laser beams emitted by the two laser displacement sensors 206 are then bent at a 90-degree angle and illuminate both sides of the inner wall of the drum. The inner diameter of the drum is obtained by adding the A and B values ​​collected by the two laser displacement sensors 206 to the fixed C value. This application is based on a non-contact measurement scheme using laser displacement sensors 206. In this scheme, the laser displacement sensor 206 is responsible for measuring the position of the inner wall of the drum, the prism 205 is used to change the direction of the laser, and the host computer software is responsible for data processing and display. Compared with traditional laser coaxial displacement gauges, laser displacement sensors 206 are not only cheaper, but also do not require physical contact with the inner wall of the drum during the entire measurement process, thus avoiding contact damage.

[0036] Finally, due to the structural design where the inner diameter of the sleeve 9 is larger than the outer diameter of the lifting rod 203, when the rotating end of the motor 4 rotates through the synchronous belt 6 to the driven pulley 7, the rotation of the U-shaped plate 10 does not interfere with the lifting rod 203. This allows the roller accessory held by the centering clamps 1205 on both sides inside the notch of the U-shaped plate 10 to rotate under the drive of the motor 4. During this time, the prism 205 and the two laser displacement sensors 206 that work with it remain stationary, so that the inner diameter roundness data of the roller accessory can be dynamically acquired. Through multi-beam synchronous scanning and adaptive prism 205 compensation technology, the equipment cost is reduced while supporting dynamic roundness analysis, which better reflects the circumferential uniformity of the roller accessory.

[0037] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, and the existence of an infinite number of specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A laser inspection device for printing press parts, comprising a tooling substrate (1) and a laser inspection assembly (2), characterized in that, A laser detection assembly (2) is provided below the tooling base plate (1). The laser detection assembly (2) includes a cylinder (201) bolted to the back end of the tooling base plate (1). A connecting plate (202) is fixedly connected to the telescopic end of the cylinder (201), and a lifting rod (203) is fixedly connected to the bottom end of the connecting plate (202). A toothed ring (204) is fixedly fixed radially at equal intervals in the middle of the lifting rod (203), and a prism (205) is fixedly installed at the end of the lifting rod (203). Laser displacement sensors (206) are fixedly installed on both sides of the lifting rod (203), and both laser displacement sensors (206) are connected to the laser base plate (1) via signal cables. The host computer is electrically connected. One end of the tooling base plate (1) is fixedly mounted with a mounting plate (3), and a motor (4) is fixedly bolted to the bottom of the mounting plate (3). The rotating end of the motor (4) is fixedly connected with a drive pulley (5), and a synchronous belt (6) is sleeved on the outer circle of the drive pulley (5). The synchronous belt (6) rotates and drives a driven pulley (7) at the end away from the drive pulley (5). The driven pulley (7) is rotatably mounted on the other end of the tooling base plate (1) through a bottom slewing bearing (8). A sleeve (9) is coaxially connected to the bottom of the driven pulley (7), and the inner diameter of the sleeve (9) is larger than the outer diameter of the lifting rod (203). The sleeve (9) is away from the driven pulley. (7) A U-shaped plate (10) is connected to one end of the transmission, and guide grooves (11) are symmetrically opened on both sides of the top of the U-shaped plate (10). Two laser displacement sensors (206) are arranged side by side and vertically irradiated on both sides of the prism (205). The laser beams emitted by the two laser displacement sensors (206) are bent at ninety degrees and irradiate the inner wall of the roller. A linkage assembly (12) is provided inside the recess of the U-shaped plate (10). The linkage assembly (12) includes a bidirectional lead screw (1201) rotatably installed on the inner wall of the recess of the U-shaped plate (10). The two sides of the bidirectional lead screw (1201) have opposite spiral directions. The linkage assembly (12) also includes a coaxial fixing. The gear (1202) in the middle of the bidirectional lead screw (1201) meshes with the gear ring (204) radially arranged in the middle of the lifting rod (203). The linkage assembly (12) also includes a sliding sleeve (1203) threaded to both sides of the bidirectional lead screw (1201). The top of the sliding sleeve (1203) is fixedly connected to a guide rod (1204), and the two guide rods (1204) on both sides slide in cooperation with the corresponding guide grooves (11). The bottom of the sliding sleeve (1203) is fixedly connected to a centering clamp (1205), and the "V" shaped notches of the two centering clamps (1205) on both sides are centered in cooperation with the outer wall of the roller.

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