Precise riveting process and equipment for ruler blank and pin column of digital display angle ruler

Abstract

The invention discloses a digital display bevel protractor blank and pin precise pressing riveting process and equipment, and the digital display bevel protractor blank and pin precise pressing riveting process comprises the following steps: S1, providing a pin and a ruler blank made of various materials; s2, the pin column is accurately positioned and placed at a preset position to be riveted on the ruler blank; s3, pressing riveting equipment is operated to press the pin column into the ruler blank; s4, the material of the ruler blank is promoted to deform and is embedded into the concave seam of the pin column, and the connecting strength is improved; and S5, by means of the hexagonal structure of the pin column, the situation that the pin column loosens and rotates after being connected is effectively reduced. The digital display angle ruler blank and pin column precision press-riveting equipment comprises a pin column, a ruler blank, a press-riveting assembly, a polishing assembly and a protection assembly. A stable mechanical interlocking structure is formed through the press riveting process, and the connecting strength of the ruler blank and the pin column is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of riveting equipment, and in particular to a digital display angle ruler blank and pin precision riveting equipment. Background Art

[0002] Pressure riveting is a commonly used connection technology, which uses molds or special tools to press fasteners such as rivets, nuts, pins, etc., so that they are tightly combined with plates or other connecting parts to achieve the purpose of connection. Pressure riveting technology has the advantages of high connection strength, simple operation, and high production efficiency. It is widely used in machinery, automobiles, electronics, aerospace and other fields. Patent publication number "CN111390096B" discloses a pressure gauge movement riveting device and riveting method. Ventilation holes are opened on the weight block to facilitate the heat dissipation of the weight block during continuous operation. To prevent the generation of excessive heat during the continuous operation of the weight block, the third hydraulic rod is operated to move the connecting plate upward. During the upward movement of the connecting plate, the blocking rod is driven to move upward until the blocking rod is separated from the through hole. Although this can facilitate the circulation of air in the cavity, the heat dissipation function is achieved under the action of the cooling pipe.

[0003] However, in actual use, if the surface of the riveted parts is not polished in advance during the riveting process, the original burrs, rust, oil stains or other small impurities may become hidden dangers in the riveting process. These surface defects will not only directly affect the contact area and uniformity during the riveting process, but may also be embedded in the joint surface between the rivet and the workpiece during the riveting process, resulting in a decrease in the reliability of the connection. Secondly, if the pressure of the riveting equipment is too high, it may cause excessive deformation of the workpiece itself, directly destroying the structural integrity of the workpiece.

[0004] Based on this, the present application proposes a digital display angle ruler blank and pin precision riveting equipment. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a digital display angle ruler blank and pin precision riveting equipment.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A precision riveting process for a digital angle ruler blank and a pin, comprising the following steps: S1. Prepare materials: Provide pins and ruler blanks made of various plastics or softer metals such as aluminum.

[0007] S2. Positioning: accurately position the pin at the pre-set riveting position on the blank.

[0008] S3. Preliminary riveting: Operate the riveting equipment to press the pin into the blank at a pressure of about 3MPa, and this pressure can be adjusted accordingly according to the soft and hard characteristics of the blank material.

[0009] S4. Strength improvement: During the riveting process, the material of the blank is deformed and embedded in the concave groove of the pin, thereby improving the strength of the connection.

[0010] S5. Prevent loosening: Utilize the hexagonal structure of the pin to effectively reduce the loosening and rotation of the pin after connection.

[0011] The present invention also provides a digital display angle ruler blank and pin precision riveting device, which adopts the above-mentioned digital display angle ruler blank and pin precision riveting process for riveting, including a pin, a ruler blank, a riveting assembly, a grinding assembly and a protective assembly; The pin is arranged above the ruler blank, a slider is arranged above the pin, an electric telescopic rod is fixedly installed below the slider, a template is clamped below the ruler blank, and a rubber tube is connected below the template; The press riveting assembly is used to press rivet the pin onto the ruler blank, and the press riveting assembly is composed of a hydraulic press and a rivet head, wherein the hydraulic press is fixedly installed under the slider, and the rivet head is fixedly installed on the output shaft of the hydraulic press; The grinding assembly is used to grind the ruler blank, and the grinding assembly is composed of a second motor, a grinding cover and a plurality of grinding strips. The second motor is fixedly mounted on the output end of the electric telescopic rod, the grinding cover is fixedly connected to the output shaft of the second motor, and a plurality of the grinding strips are rotatably connected to the grinding cover; The protection component is used to prevent the ruler blank from being damaged due to excessive pressure. The protection component consists of a pressure cylinder, two pressure relief ports and two push blocks. The pressure cylinder is connected below the rubber cylinder, the two pressure relief ports are connected on both sides of the pressure cylinder, and the two push blocks are slidably connected in the two pressure relief ports.

[0012] Preferably, two rigid springs are fixedly connected below the template, and one end of the two rigid springs away from the template is fixedly connected to a workbench, a slide groove is provided above the workbench, and two pressure plates are slidably connected to the slide groove, and the template is placed on the two pressure plates, and a first piston is slidably connected in the rubber cylinder, and a pressing block is fixedly connected to the first piston, and the pin is placed on the pressing block.

[0013] Preferably, the rivet head is directly opposite to the pin column, and torsion springs are provided at the connection between the plurality of grinding strips and the grinding cover, and the ends of the two push blocks away from the pressure relief port are fixedly connected to the two pressure plates respectively.

[0014] Preferably, two mounting plates are fixedly connected above the workbench, two brackets are fixedly connected below the workbench, cleaning components for cleaning debris on the ruler blank are respectively provided on the two mounting plates, a screw rod is rotatably connected between the two mounting plates, a sliding rod is provided below the screw rod and fixedly connected between the two mounting plates, and the slider is slidably connected to the screw rod and the sliding rod.

[0015] Preferably, a motor bracket is fixedly connected to the mounting plate, a first motor is fixedly mounted on the motor bracket, and a transmission shaft of the first motor is fixedly connected to a screw rod.

[0016] Preferably, the cleaning assembly consists of a gas collecting cylinder, a second piston, an air pipe and a piston rod. The gas collecting cylinder is fixedly connected to the mounting plate, the second piston is slidably connected in the gas collecting cylinder, the piston rod is slidably connected to the gas collecting cylinder, and the air pipe is connected to the gas collecting cylinder.

[0017] Preferably, one end of the piston rod is fixedly connected to the second piston, and the other end is fixedly connected to the pressure plate, and the end of the air pipe away from the air collecting cylinder is arranged on the side of the riveting position between the ruler blank and the pin.

[0018] The present invention has the following beneficial effects: Through this riveting process, the ruler blank material is deformed and embedded in the pin groove during riveting, forming a stable mechanical interlocking structure, greatly improving the connection strength, and significantly increasing the breaking load compared to traditional connection methods. At the same time, the hexagonal structure of the pin effectively resists loosening and rotation under various working conditions, greatly reducing the loose displacement and rotation angle, ensuring the connection stability and component position accuracy. This process is suitable for a variety of plastic and soft metal ruler blank materials, giving full play to the characteristics of different materials, and providing rich choices for product design and manufacturing.

[0019] After starting the second motor through the grinding assembly, electric telescopic rod and other parts, the electric telescopic rod drives the second motor to descend, so that the grinding cover on the second motor drives the grinding bar to rotate at high speed, so that the grinding bar can contact and act on the surface of the ruler blank in a high-speed rotating manner, which can effectively remove the burrs and fine impurities that may exist on the surface of the ruler blank, ensuring that the smoothness and cleanliness of the surface of the ruler blank meet the requirements of subsequent processing. Then, as the grinding cover continues to go deeper, the grinding bars begin to gather together and enter the reserved hole of the ruler blank, and begin to grind the edge of the reserved hole of the ruler blank, which can ensure that the edge of the hole is also evenly and thoroughly polished, thereby eliminating all potential factors that may affect the quality of the riveting. In this way, the surface of the ruler blank and the edge of the reserved hole have achieved a high degree of flatness. This not only creates ideal conditions for the subsequent riveting process, but also significantly improves the area and uniformity of the contact surface during riveting. More importantly, it effectively avoids the possibility that burrs and fine impurities may be embedded in the joint surface between the pin and the ruler blank during the riveting process, thereby preventing these unfavorable factors from weakening the riveting strength, ensuring the reliability of the connection and the stability of the overall structure.

[0020] Through the protection component, when the rivet head continuously presses the pin, the pin will push the pressing block to make the first piston drop, so that air pressure is generated inside the rubber tube and the pressure tube. As the first piston continues to drop deeper, the air pressure continues to increase, so that the push block continuously pushes the pressure plate under the action of air pressure, so that the two pressure plates continue to move away from each other. When the critical point is reached, the template loses the hard support of the pressure plate, so that the pressure of the rivet head acts on the rubber tube and the steel spring. The rubber tube, with its good elasticity and recovery, can effectively absorb and disperse the pressure from the rivet head, while the steel spring provides additional buffering and stabilizing effects. The two work together to ensure that even if the rivet head applies a large pressure, it can effectively buffer the excessive pressure and prevent the pin from being deformed due to excessive extrusion, thereby maintaining its original mechanical locking ability. In this way, it can avoid excessive extrusion and deformation of the pin due to excessive pressure during riveting, and lose the original mechanical locking ability, thereby reducing the firmness and durability of the riveting. If the pressure is too small, the riveting is not firm, which in turn affects the connection effect and the stability of the workpiece.

[0021] 4. By cleaning components, pressure plates and other parts, when the pressure plates are reset by moving closer to each other, the piston rod will be driven to make the second piston move in the air collecting cylinder. Under the action of the second piston, the air in the air collecting cylinder is pushed into the air pipe. When the air passes through the air pipe, the air flow rate is accelerated due to the limitation of the internal diameter of the air pipe. According to Bernoulli's principle, the increase in flow rate will lead to a decrease in pressure. However, at the outlet of the air pipe, the air flow rate slows down due to the sudden increase in the diameter, and the pressure increases accordingly, thus generating a huge pressure difference. It is this pressure difference that enables the air in the air pipe to generate a huge pressure, which is enough to blow away the fine debris generated during the grinding or riveting process near the template. This process not only effectively cleans the working area and improves work efficiency, but also avoids the interference of grinding and riveting debris on subsequent processes, ensuring the stability of product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a digital display angle ruler blank and pin precision riveting equipment proposed by the present invention; Figure 2 This is a schematic diagram of the connection structure of a digital display angle ruler blank and the pressure plate, slide groove, template and other parts of the pin precision riveting equipment proposed by the present invention; Figure 3 This is a schematic diagram of the connection structure of a digital display angle ruler blank and pin precision riveting equipment spring, workbench, push block and other parts proposed by the present invention; Figure 4 An exploded view of the parts such as the pin, the blank, and the template of a digital angle ruler blank and pin precision riveting equipment proposed by the present invention; Figure 5 This is a schematic diagram of the connection structure of a digital angle ruler blank and pin precision riveting equipment protection components, a rubber cylinder, a pressing block and other parts proposed by the present invention; Figure 6 This is a schematic diagram of the connection structure of a digital display angle ruler blank and components such as a slider, a screw rod, and a first motor of a pin precision riveting device proposed by the present invention; Figure 7 A schematic diagram of the connection structure of a digital display angle ruler blank and a grinding cover and a grinding strip of a pin precision riveting device proposed by the present invention; Figure 8 This is a cross-sectional view of the interior of a gas collecting cylinder of a digital display angle ruler blank and pin precision riveting equipment proposed by the present invention; Fig. 9 A side view of a digital display angle ruler blank and pin precision riveting equipment proposed by the present invention.

[0023] In the figure: 1 workbench, 2 bracket, 3 mounting plate, 4 motor bracket, 5 first motor, 6 slider, 7 air pipe, 8 grinding strip, 9 template, 10 foot blank, 11 screw rod, 12 second piston, 13 pin, 14 slide groove, 15 pressure plate, 16 grinding cover, 17 spring, 18 pressing block, 19 push block, 20 pressure cylinder, 21 rubber cylinder, 22 slide rod, 23 first piston, 24 pressure relief port, 25 electric telescopic rod, 26 second motor, 27 air collecting cylinder, 28 hydraulic press, 29 piston rod, 30 rivet head. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] A precision riveting process for a digital angle ruler blank and a pin, comprising the following steps: S1. Prepare materials: Select a suitable pin with a hexagonal shape and a concave seam design. The blank material is determined to be aluminum alloy, which has the characteristics of being light, relatively soft and easy to process and deform, and meets the requirements of this process for softer metal materials. At the same time, prepare the riveting equipment and ensure that its pressure adjustment function can operate normally, the pressure value can be accurately set, and its range can meet the operating requirements of about 3MPa pressure in this process.

[0026] S2. Positioning: Place the blank on a special tooling die, which can stably fix the blank to prevent it from shifting during subsequent operations, laying the foundation for subsequent precise riveting operations.

[0027] S3. Preliminary riveting: At the beginning of riveting, the rivet head of the riveting equipment moves slowly downward to apply pressure to the pin. Due to the soft properties of aluminum alloy, the pin is gradually pressed into the blank. During this process, closely observe the deformation of the blank and the pin. If it is found that the blank material deforms too quickly or too slowly, fine-tune the pressure of the riveting equipment according to the actual situation. For example, if it is found that the aluminum alloy blank deforms too slowly, indicating that the pressure is slightly insufficient, the pressure can be appropriately increased to 3.2MPa; if the deformation is too fast, the pressure is reduced to 2.8MPa accordingly. Through this dynamic adjustment, it is ensured that during the riveting process, the blank material can be deformed evenly and gradually filled into the concave gap of the pin.

[0028] S4. Improved strength: During the riveting process, it was observed that the connection strength between the pin and the blank was significantly improved due to the successful deformation of the blank material into the pin groove. When the tensile force reached a certain value, such as 500N, the connection remained intact, and there was no phenomenon of the pin loosening or being pulled out of the blank, indicating that the process effectively improved the connection strength and met the expected design requirements.

[0029] S5. Prevent loosening: Compared with the traditional circular pin connection method, the hexagonal pin used in this process reduces the loosening angle by about 80% and the rotation displacement is almost zero, which fully demonstrates the significant effect of the hexagonal structure in reducing pin loosening and rotation.

[0030] The present invention also provides a digital display angle ruler blank and pin precision riveting device, which adopts the above-mentioned digital display angle ruler blank and pin precision riveting process for riveting, including the following steps: Embodiment 1

[0031] Reference Figure 1-Figure 5 , a digital display angle ruler blank and pin precision riveting equipment, including a pin 13, a ruler blank 10, a riveting assembly, a grinding assembly and a protective assembly; The pin 13 is arranged above the ruler blank 10, and a slider 6 is arranged above the pin 13. An electric telescopic rod 25 is fixedly installed below the slider 6. The electric telescopic rod 25 can control the second motor 26 to rise or fall. A template 9 is clamped below the ruler blank 10. During riveting, the template 9 can keep the ruler blank 10 stable. A rubber tube 21 is connected below the template 9, and two steel springs 17 are fixedly connected below the template 9. The two steel springs 17 are fixedly connected to the workbench 1 at one end away from the template 9. In this way, when the pressure of the rivet head 30 acts on the rubber tube 21 and the steel spring 17, the rubber tube 21, with its good elasticity and recovery, can effectively absorb and disperse the pressure from the rivet head 30, while the steel spring 17 provides additional buffering and stabilizing effects. The two work together to ensure that even when the rivet head 30 applies a large pressure, the excessive pressure can be effectively buffered. A slide groove 14 is provided above the workbench 1, and two pressure plates 15 are slidably connected to the slide groove 14. The pressure plates 15 can slide in the slide groove 14, and the template 9 is placed on the two pressure plates 15. When the riveting work is performed, the pressure plates 15 can provide good hard support for the template 9 to ensure the progress of the riveting work.

[0032] The riveting assembly is used to rivet the pin 13 onto the ruler blank 10. The riveting assembly consists of a hydraulic press 28 and a rivet head 30. The hydraulic press 28 is fixedly installed below the slider 6. The rivet head 30 is fixedly installed on the output shaft of the hydraulic press 28. The rivet head 30 is directly opposite the pin 13. Starting the hydraulic press 28 can drive the rivet head 30 to continuously descend to rivet the pin 13. A first piston 23 is slidably connected in the rubber cylinder 21. A pressing block 18 is fixedly connected to the first piston 23. The pin 13 is placed on the pressing block 18. When the pin 13 descends, the pressing block 18 can be pushed to cause the first piston 23 to continuously descend.

[0033] The protection component is used to prevent the ruler blank 10 from being damaged due to excessive pressure. The protection component consists of a pressure cylinder 20, two pressure relief ports 24 and two push blocks 19. The pressure cylinder 20 is connected to the bottom of the rubber cylinder 21, and the two pressure relief ports 24 are connected to both sides of the pressure cylinder 20. The two push blocks 19 are slidably connected in the two pressure relief ports 24. The ends of the two push blocks 19 away from the pressure relief ports 24 are respectively fixedly connected to the two pressure plates 15. In this way, when the two push blocks 19 are pushed by air pressure, they will push the pressure plates 15 away from each other, so that the template 9 loses its hard support, avoiding excessive extrusion and deformation of the pin 13 due to excessive pressure during riveting.

[0034] In this embodiment, when the hydraulic press 28 drives the rivet head 30 to descend, the rivet head 30 continuously presses the pin 13, and the pin 13 pushes the pressing block 18 to make the first piston 23 descend, thereby generating air pressure inside the rubber tube 21 and the pressure tube 20. As the first piston 23 continues to descend and deepen, the air pressure continues to increase, so that the push block 19 continuously pushes the pressure plate 15 under the action of the air pressure, so that the two pressure plates 15 continue to move away from each other. When the critical point is reached, the template 9 loses the hard support of the pressure plate 15, so that the pressure of the rivet head 30 acts on the rubber tube 21 and the steel spring 17. The rubber tube 21, with its good elasticity and recovery, can effectively absorb and disperse the pressure from the rivet head 30, and the steel spring 17 provides additional buffering and stabilizing effects. The two work together to ensure that even when the rivet head 30 applies a large pressure, it can effectively buffer the excessive pressure and prevent the pin 13 from being deformed due to excessive extrusion, thereby maintaining its original mechanical locking ability. In this way, it can be avoided that the pin 13 is excessively extruded and deformed due to excessive pressure during riveting, and loses its original mechanical locking ability, thereby reducing the firmness and durability of the riveting. If the pressure is too small, the riveting will be loose, which will further affect the connection effect and the stability of the workpiece. The rivet head 30 can force the pin 13 into the reserved hole of the ruler blank 10. In this process, the material on the ruler blank 10 will be strongly extruded and plastically deformed. This deformation process is not just a simple change in shape. More importantly, part of the material of the ruler blank 10 will penetrate along the concave seam on the surface of the pin 13 and embed into it. The mutual penetration and embedding between the materials form a structure similar to a "lock", which greatly enhances the connection strength between the pin and the ruler blank. In addition, since the top of the pin 13 is hexagonal, it can effectively prevent the pin 13 from loosening or falling off, which not only ensures the stability and reliability of the connection part, but also improves the strength and durability of the entire connection structure. Embodiment 2

[0035] Different from the first embodiment, Figure 4-Figure 7 , this embodiment also has the following further contents: The grinding assembly is used to grind the ruler blank 10. The grinding assembly consists of a second motor 26, a grinding cover 16, and a plurality of grinding strips 8. The second motor 26 is fixedly mounted on the output end of the electric telescopic rod 25. The electric telescopic rod 25 can drive the second motor 26 to slide up and down. The grinding cover 16 is fixedly connected to the output shaft of the second motor 26. The plurality of grinding strips 8 are rotatably connected to the grinding cover 16 for grinding the ruler blank 10. The connection between the plurality of grinding strips 8 and the grinding cover 16 is provided with a torsion spring. In this way, when the second motor 26 drives the grinding cover 1 6 rotates, the grinding strip 8 can also rotate at a high speed, so as to grind the surface of the ruler blank 10, ensuring that the smoothness and cleanliness of the surface of the ruler blank 10 meet the requirements of subsequent processing. Then, as the grinding cover 16 continues to go deeper, the grinding strips 8 begin to converge with each other and enter the reserved hole of the ruler blank 10, and begin to grind the edge of the reserved hole of the ruler blank 10, which can ensure that the edge of the hole is also evenly and thoroughly polished, thereby eliminating all potential factors that may affect the quality of the riveting, so that the surface of the ruler blank 10 and the edge of the reserved hole have achieved a high degree of flatness.

[0036] A cooling assembly for cooling the rivet head 30 and the grinding strip 8 is provided above the workbench 1. Two brackets 2 are fixedly connected below the workbench 1 for supporting the overall device. Two mounting plates 3 are fixedly connected above the workbench 1. Cleaning assemblies for cleaning debris on the ruler blank 10 are respectively provided on the two mounting plates 3. A screw rod 11 is rotatably connected between the two mounting plates 3. A slide bar 22 is provided below the screw rod 11 and fixedly connected between the two mounting plates 3. A slider 6 is slidably connected to the screw rod 11 and the slide bar 22. When the screw rod 11 rotates, it can drive the slider 6 to slide on the slide bar 22 and the screw rod 11. A motor bracket 4 is fixedly connected to the mounting plate 3. A first motor 5 is fixedly installed on the motor bracket 4. The drive shaft of the first motor 5 is fixedly connected to the screw rod 11, and the screw rod 11 can be rotated by the first motor 5.

[0037] In this embodiment, the first motor 5 is started to drive the screw 11 to rotate, so that the slider 6 drives the electric telescopic rod 25 and the grinding assembly to slide above the ruler blank 10, and then the second motor 26 is started, and the electric telescopic rod 25 drives the second motor 26 to descend, so that the grinding cover 16 on the second motor 26 drives the grinding strip 8 to rotate at a high speed, so that the grinding strip 8 can contact and act on the surface of the ruler blank 10 in a high-speed rotating manner, which can effectively remove the burrs and fine impurities that may exist on the surface of the ruler blank 10, and ensure that the smoothness and cleanliness of the surface of the ruler blank 10 meet the requirements of subsequent processing. Then, as the grinding cover 16 continues to go deeper, the grinding strips 8 begin to gather together and enter the reserved hole of the ruler blank 10, and begin to grind the edge of the reserved hole of the ruler blank 10, which can ensure that the edge of the hole is also evenly and thoroughly polished, thereby eliminating all potential factors that may affect the quality of the riveting, so that the surface of the ruler blank 10 and the edge of the reserved hole have a high degree of flatness. This not only creates ideal conditions for the subsequent riveting process, but also significantly improves the area and uniformity of the contact surface during riveting. More importantly, it effectively prevents burrs and fine impurities from being embedded in the joint surface between the pin 13 and the ruler blank 10 during the riveting process, thereby preventing these adverse factors from weakening the riveting strength, ensuring the reliability of the connection and the stability of the overall structure. When the grinding strip 8 has finished grinding the edge of the reserved hole of the ruler blank 10, a certain space is created around the grinding strip 8. At this time, due to the action of the torsion spring, the grinding strip 8 begins to shrink inwards to each other, jamming the pressing block 18 located inside the grinding cover 16, and then the electric telescopic rod 25 drives the grinding assembly to rise. The pressing block 18 and the first piston 23 gradually rise to the original position under the action of the grinding strip 8, and the negative pressure generated by the first piston 23 at this time causes the push block 19 to drive the pressure plate 15 to move closer to each other below the template 9, and then the grinding strip 8 is bent to release the pressing block 18, and the grinding strip 8 continues to rise. Embodiment 3

[0038] Different from the second embodiment, referring to Figure 6 , Figure 8 and Fig. 9 , this embodiment also has the following further contents: The cleaning assembly consists of an air cylinder 27, a second piston 12, an air pipe 7 and a piston rod 29. The air cylinder 27 is fixedly connected to the mounting plate 3, and the second piston 12 is slidably connected in the air cylinder 27. When the second piston 12 slides in the air cylinder 27, air pressure can be generated. The piston rod 29 is slidably connected to the air cylinder 27. The air pipe 7 is connected to the air cylinder 27. One end of the piston rod 29 is fixedly connected to the second piston 12, and the other end is fixedly connected to the pressure plate 15. In this way, when the pressure plate 15 slides, the piston rod 29 can drive the second piston 12 to slide in the air cylinder 27. The end of the air pipe 7 away from the air cylinder 27 is arranged on the side of the riveting place between the ruler blank 10 and the pin 13.

[0039] In this embodiment, when the pressure plate 15 is brought close to each other and reset under the action of the grinding assembly, it will drive the piston rod 29 to make the second piston 12 move in the air collecting cylinder 27. Under the action of the second piston 12, the air in the air collecting cylinder 27 is pushed into the air pipe 7. When the air passes through the air pipe 7, due to the limitation of the internal diameter of the air pipe 7, the air flow rate is accelerated. According to the Bernoulli principle, the increase in flow rate will lead to a decrease in pressure. However, at the outlet of the air pipe 7, due to the sudden increase in the diameter, the air flow rate slows down, and the pressure increases accordingly, thereby generating a huge pressure difference. It is this pressure difference that enables the air in the air pipe 7 to generate a huge pressure, which is enough to blow away the fine debris generated during the grinding or riveting process near the template 9. This process not only effectively cleans the working area and improves work efficiency, but also avoids the interference of grinding and riveting debris on subsequent processes, ensuring the stability of product quality.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A precision riveting process for a digital angle ruler blank and a pin, characterized in that: The following steps are involved: S1. Prepare materials: provide pins and ruler blanks made of various plastics or softer metals such as aluminum; S2. Positioning: accurately position the pin at the pre-set riveting position on the blank; S3. Preliminary riveting: operate the riveting equipment to press the pin into the blank at a pressure of about 3MPa, and this pressure can be adjusted accordingly according to the soft and hard characteristics of the blank material; S4. Strength improvement: During the riveting process, the material of the ruler blank is deformed and embedded in the concave groove of the pin, thereby improving the strength of the connection; S5. Prevent loosening: Utilize the hexagonal structure of the pin to effectively reduce the loosening and rotation of the pin after connection.

2. A digital angle ruler blank and pin precision riveting equipment, characterized in that: It comprises a pin (13), a ruler blank (10), a riveting assembly, a grinding assembly and a protective assembly; The pin (13) is arranged above the ruler blank (10), a slider (6) is arranged above the pin (13), an electric telescopic rod (25) is fixedly installed below the slider (6), a template (9) is clamped below the ruler blank (10), and a rubber tube (21) is connected below the template (9); The press riveting assembly is used to press rivet the pin (13) onto the ruler blank (10), and the press riveting assembly is composed of a hydraulic press (28) and a rivet head (30), wherein the hydraulic press (28) is fixedly mounted below the slider (6), and the rivet head (30) is fixedly mounted on the output shaft of the hydraulic press (28); The grinding assembly is used to grind the ruler blank (10), and the grinding assembly is composed of a second motor (26), a grinding cover (16), and a plurality of grinding strips (8), wherein the second motor (26) is fixedly mounted on the output end of the electric telescopic rod (25), the grinding cover (16) is fixedly connected to the output shaft of the second motor (26), and the plurality of grinding strips (8) are rotatably connected to the grinding cover (16); The protection component is used to prevent the ruler blank (10) from being damaged due to excessive pressure. The protection component is composed of a pressure cylinder (20), two pressure relief ports (24) and two push blocks (19). The pressure cylinder (20) is connected to the bottom of the rubber cylinder (21), the two pressure relief ports (24) are connected to both sides of the pressure cylinder (20), and the two push blocks (19) are slidably connected in the two pressure relief ports (24).

3. According to claim 2, a digital display angle ruler blank and pin precision riveting equipment is characterized in that: Two steel springs (17) are fixedly connected below the template (9), and one end of the two steel springs (17) away from the template (9) is fixedly connected to a workbench (1). A slide groove (14) is provided above the workbench (1), and two pressure plates (15) are slidably connected to the slide groove (14). The template (9) is placed on the two pressure plates (15). A first piston (23) is slidably connected in the rubber cylinder (21), and a pressing block (18) is fixedly connected to the first piston (23), and the pin (13) is placed on the pressing block (18).

4. According to claim 2, a digital display angle ruler blank and pin precision riveting equipment is characterized in that: The lower side of the rivet head (30) is directly opposite to the pin (13), and a torsion spring is provided at the connection between the plurality of grinding strips (8) and the grinding cover (16). The ends of the two push blocks (19) away from the pressure relief port (24) are fixedly connected to the two pressure plates (15) respectively.

5. According to claim 3, a digital display angle ruler blank and pin precision riveting equipment is characterized in that: Two mounting plates (3) are fixedly connected above the workbench (1), and two brackets (2) are fixedly connected below the workbench (1). Cleaning components for cleaning debris on the ruler blank (10) are respectively provided on the two mounting plates (3). A screw rod (11) is rotatably connected between the two mounting plates (3). A slide rod (22) is provided below the screw rod (11) and is fixedly connected between the two mounting plates (3). The slide block (6) is slidably connected to the screw rod (11) and the slide rod (22).

6. The digital angle ruler blank and pin precision riveting equipment according to claim 5 is characterized in that: A motor bracket (4) is fixedly connected to the mounting plate (3), a first motor (5) is fixedly mounted on the motor bracket (4), and a transmission shaft of the first motor (5) is fixedly connected to a screw rod (11).

7. The digital angle ruler blank and pin precision riveting equipment according to claim 5 is characterized in that: The cleaning assembly is composed of an air collecting cylinder (27), a second piston (12), an air pipe (7) and a piston rod (29); the air collecting cylinder (27) is fixedly connected to the mounting plate (3); the second piston (12) is slidably connected in the air collecting cylinder (27); the piston rod (29) is slidably connected to the air collecting cylinder (27); and the air pipe (7) is connected to the air collecting cylinder (27).

8. The digital angle ruler blank and pin precision riveting equipment according to claim 7 is characterized in that: One end of the piston rod (29) is fixedly connected to the second piston (12), and the other end is fixedly connected to the pressure plate (15). The end of the air pipe (7) away from the air collecting cylinder (27) is arranged on one side of the riveting position between the ruler blank (10) and the pin (13).

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