Non-metallic engraving processing anti-collision device

Abstract

This utility model relates to an anti-collision device for non-metallic engraving processing, including an engraving machine frame, a buffer guide assembly, and a tool assembly. The tool assembly includes a drive motor, a tool shaft, and a tool. A gradient hardness composite elastic buffer sleeve is fitted on the outer side of the tool shaft. The buffer guide assembly includes guide rails symmetrically mounted on the outer side of the tool shaft and a movable tool holder located between the two guide rails. The drive motor is mounted on the movable tool holder. A guide groove is provided on the inner side of the guide rail. The movable tool holder is slidably connected to the guide groove via a slider. A magnetorheological damper is provided on the contact surface between the slider and the guide groove. This utility model reduces the breakage rate of the workpiece and the frequency of tool replacement through effective anti-collision buffering, reduces downtime during processing, improves the continuity and stability of processing, thereby significantly improving processing quality and efficiency and reducing processing costs.

Description

Technical Field

[0001] This utility model relates to the field of non-metallic material processing equipment technology, and in particular to a non-metallic engraving processing anti-collision device. Background Technology

[0002] In the current non-metallic engraving industry, engraving operations on non-metallic materials such as wood, plastic, and foam are widely used. However, due to the relatively soft texture or special structure of non-metallic materials, the workpiece strength is low during the processing of thin-walled structural parts, making it prone to deformation under external forces. When the workpiece surface has irregular shapes, the difficulty of planning the engraving machine's running path increases, and the risk of collision between the tool and the workpiece is significantly increased.

[0003] In existing technologies, engraving equipment generally lacks effective buffering structures. When the tool collides with the workpiece, the impact force generated at the moment of impact acts directly on both the tool and the workpiece without buffering. This not only causes the workpiece to break due to excessive force, affecting the quality and pass rate of the finished product, but also damages the tool, increasing the frequency of tool replacement and processing costs. Furthermore, frequent downtime due to malfunctions severely reduces processing efficiency, hindering the efficient and high-quality development of the non-metallic engraving industry. Therefore, there is an urgent need to design an anti-collision device that can effectively buffer the impact force and reduce damage to the tool and workpiece. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing an anti-collision device for non-metallic engraving processing. The specific technical solution is as follows:

[0005] A non-metallic engraving anti-collision device includes an engraving frame, a buffer guide assembly, and a tool assembly. The tool assembly includes a drive motor, a cutter shaft, and a cutter. A gradient hardness composite elastic buffer sleeve is fitted on the outer side of the cutter shaft. The buffer guide assembly includes guide rails symmetrically mounted on the outer side of the cutter shaft and a movable tool holder located between the two guide rails. The drive motor is mounted on the movable tool holder. A guide groove is provided on the inner side of the guide rail. The movable tool holder is slidably connected to the guide groove via a slider. A magnetorheological damper is provided on the contact surface between the slider and the guide groove.

[0006] Preferably, a permanent magnet is installed at the bottom of the guide groove, and an induction coil is provided at the bottom of the slider to cooperate with the permanent magnet. When the slider approaches the extreme position of the permanent magnet, the induction coil generates a reverse electromagnetic force.

[0007] Preferably, the device also includes a controller and a sensing system. The sensing system includes a proximity sensor for monitoring the distance between the tool and the workpiece and a displacement sensor for measuring changes in the axial displacement of the tool. Both the sensing system and the magnetorheological damper are connected to the controller.

[0008] Preferably, the gradient hardness composite elastic buffer sleeve includes a silicone rubber layer, a corrugated metal foil and a polyurethane layer arranged sequentially from the inside to the outside. The silicone rubber layer has a Shore hardness of 40-50, the polyurethane layer has a Shore hardness of 70-80, and the silicone rubber layer is provided with a honeycomb-shaped shock-absorbing cavity with a hole diameter of 3-5mm near the cutter shaft and a hole diameter of 8-10mm on the outer side.

[0009] Preferably, the output shaft of the drive motor is connected to the cutter shaft, and the cutter is connected to the cutter shaft.

[0010] Preferably, it also includes a moving component for driving the tool assembly to move linearly, the moving component including a hydraulic cylinder mounted on the engraving machine frame, the output rod of the hydraulic cylinder being connected to a drive motor.

[0011] The beneficial effects of this utility model are:

[0012] 1. The gradient hardness composite elastic buffer sleeve forms a multi-level buffer structure with a silicone rubber layer, a corrugated metal foil, and a polyurethane layer. In the initial stage of the impact, the honeycomb-shaped damping cavity and elastic deformation of the silicone rubber layer absorb most of the impact force; subsequently, the corrugated metal foil further buffers the impact through elastic bending deformation; finally, the polyurethane layer provides rigid support and final buffering. The multi-level buffering works synergistically to significantly reduce the impact force acting on the tool and workpiece at the moment of impact, reducing workpiece breakage and tool damage.

[0013] 2. The magnetorheological damper, combined with the sensing system and controller, can adjust the damping force in real time according to the severity of the collision. In the event of a minor collision, the damping force is small, ensuring that the tool assembly can be buffered in time and resume normal machining; in the event of a severe collision, the damping force automatically increases, effectively suppressing excessive displacement of the tool assembly and improving the safety and reliability of the equipment.

[0014] 3. The sliding connection structure of the guide rail and slider provides precise guidance for the tool assembly, ensuring the accuracy of the tool's movement during the engraving process. The reverse electromagnetic force generated by the permanent magnet and induction coil when the slider approaches its limit position can brake the slider, preventing the tool assembly from damaging equipment components due to excessive sliding and extending the service life of the equipment.

[0015] 4. Through effective anti-collision buffering, the breakage rate of workpieces and the frequency of tool replacement are reduced, downtime during processing is decreased, and the continuity and stability of processing are improved, thereby significantly improving processing quality and efficiency and reducing processing costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2This is a schematic diagram of the structure between the buffer guide assembly and the cutter assembly in this utility model;

[0018] Figure 3 This is a schematic diagram of the tool assembly in this utility model.

[0019] Reference numerals: 1. Engraving machine frame; 2. Hydraulic cylinder; 3. Buffer guide assembly; 30. Guide groove; 31. Guide rail; 32. Magnetorheological damper; 33. Movable tool holder; 34. Slider; 35. Induction coil; 36. Permanent magnet; 4. Tool assembly; 41. Drive motor; 42. Tool shaft; 43. Gradient hardness composite elastic buffer sleeve; 431. Polyurethane layer; 432. Waveform metal foil; 433. Silicone rubber layer; 4330. Honeycomb damping cavity; 44. Tool; 5. Proximity sensor; 6. Displacement sensor. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] Example

[0022] The purpose of this invention is to provide a collision prevention device for non-metallic engraving processing, to solve the problems of workpiece breakage and tool 44 damage caused by the direct impact force when the tool 44 collides with the workpiece during the engraving process in the prior art. By setting up a buffer guide component 3 and a tool 44 component 4 with a composite elastic buffer sleeve 43 with gradient hardness, multi-level buffering of the collision impact force is achieved, thereby improving processing quality and efficiency and reducing processing costs.

[0023] Please refer to Figures 1-3 The non-metallic engraving anti-collision device provided by this utility model includes an engraving frame 1, a buffer guide assembly 3, and a tool assembly 44. The specific structure and connection relationship of each component are as follows:

[0024] The tool 44 assembly 4 is the core execution component for realizing the engraving process, including the drive motor 41, the tool shaft 42 and the tool 44.

[0025] The drive motor 41 is mounted on the movable tool holder 33, and its output shaft is connected to the tool shaft 42, providing rotational power to the tool shaft 42 and the cutting tool 44, driving the cutting tool 44 to perform engraving operations. The drive motor 41 is fixed to the movable tool holder 33 by bolts or other fasteners to ensure the stability of power transmission.

[0026] The cutter shaft 42 is an intermediate component connecting the drive motor 41 and the cutting tool 44. The cutting tool 44 is connected to the cutter shaft 42. The cutter shaft 42 rotates under the drive of the drive motor 41, thereby driving the cutting tool 44 to rotate and realize the engraving of non-metallic materials. A gradient hardness composite elastic buffer sleeve 43 is sleeved on the outer side of the cutter shaft 42. This buffer sleeve is a key structure for the cutting tool 44 assembly 4 to realize the buffering function.

[0027] Specifically, the gradient hardness composite elastic buffer sleeve 43 includes a silicone rubber layer 433, a corrugated metal foil 432, and a polyurethane layer 431 arranged sequentially from the inside out.

[0028] The silicone rubber layer 433 has a Shore hardness of 40-50, exhibiting good elasticity and flexibility. It can rapidly undergo elastic deformation in the initial stage of an impact, absorbing part of the impact force. The silicone rubber layer 433 has honeycomb-shaped damping cavities 4330, with a diameter of 3-5 mm near the cutter shaft 42 and 8-10 mm on the outer side. This honeycomb structure design allows the honeycomb damping cavities 4330 to compress and deform upon impact, further increasing the cushioning effect. Simultaneously, the air damping effect of the honeycomb structure also dissipates some energy.

[0029] The corrugated metal foil 432 is located outside the silicone rubber layer 433, possessing a certain degree of rigidity and elasticity. After the initial buffering by the silicone rubber layer 433, it can further buffer and absorb the impact force. The corrugated structure allows it to undergo elastic bending deformation under stress, dissipating energy through the elastic deformation of the metal, while also providing some support and guidance for the cutter shaft 42.

[0030] The polyurethane layer 431 has a Shore hardness of 70-80, which has high hardness and wear resistance. As the outermost layer of the buffer sleeve, it can withstand the cutting force during the engraving process. At the same time, it plays a final buffering and protection role when there is a collision, preventing the tool 44 from being displaced too much due to excessive buffering, thus ensuring the engraving accuracy.

[0031] The buffer guide assembly 3 is used to realize the guiding and buffering functions of the tool 44 assembly 4, including the guide rails 31 symmetrically installed on the outside of the tool shaft 42 and the movable tool holder 33 located between the two guide rails 31.

[0032] The guide rails 31 are symmetrically arranged on both sides of the cutter shaft 42, and the inner side is provided with guide grooves 30 to provide a guide track for the sliding of the movable cutter holder 33. The guide rails 31 are installed on the engraving machine frame 1 by bolts and other fasteners to ensure the stability of their position.

[0033] The movable tool holder 33 is located between two guide rails 31, and the drive motor 41 is mounted on the movable tool holder 33. The movable tool holder 33 is slidably connected to the guide groove 30 via a slider 34. The movable tool holder 33 can slide along the axial direction of the tool shaft 42 within the guide groove 30 of the guide rail 31, thereby driving the tool 44 assembly 4 to perform axial buffered movement.

[0034] The slider 34 is mounted on the movable tool holder 33, and a magnetorheological damper 32 is provided on the contact surface with the guide groove 30. The magnetorheological damper 32 is a damping element that can adjust the damping force in real time according to the change of magnetic field. It is existing technology, such as the model M331819-C39. When the tool 44 assembly 4 is subjected to an impact force, the movable tool holder 33 slides in the guide groove 30 through the slider 34. The magnetorheological damper 32 generates a damping force, which buffers the sliding of the movable tool holder 33. The magnitude of the damping force can be adjusted by the magnetic field, thereby achieving adaptive buffering for different impact forces.

[0035] In the permanent magnet 36 and induction coil 35, the permanent magnet 36 is installed at the bottom end of the guide groove 30, and the induction coil 35, which works in conjunction with the permanent magnet 36, is located at the bottom of the slider 34. When the slider 34 approaches the limit position of the permanent magnet 36, the induction coil 35 cuts the magnetic field lines of the permanent magnet 36, generating a reverse electromagnetic force. This reverse electromagnetic force can brake the sliding of the slider 34, preventing the slider 34 from sliding excessively beyond the effective stroke of the guide rail 31, and further protecting the safety of the equipment.

[0036] This application also includes a controller and a sensing system, the sensing system including a proximity sensor 5 for monitoring the distance between the tool 44 and the workpiece, and a displacement sensor for measuring changes in the axial displacement of the tool 44. 6

[0037] The proximity sensor 5 is mounted on the tool 44 assembly 4 or the engraving machine frame 1 to monitor the distance between the tool 44 and the workpiece in real time. When the distance between the tool 44 and the workpiece approaches the preset safe distance, the proximity sensor 5 transmits a signal to the controller, which can then adjust the operating parameters of the engraving machine in advance to reduce the risk of collision.

[0038] The displacement sensor is used to measure the displacement change of the tool 44 in the axial direction. When the tool 44 collides with the workpiece, the tool 44 assembly 4 will be displaced in the axial direction. The displacement sensor transmits the displacement signal to the controller. The controller analyzes the magnitude and trend of the displacement signal to determine the severity of the collision and adjusts the damping force of the magnetorheological damper 32 according to the preset control strategy to achieve intelligent buffering of the collision impact force.

[0039] The controller is connected to both the sensing system and the magnetorheological damper 32, and is the core of the entire anti-collision device. The controller receives signals transmitted by the sensing system, analyzes and processes them, and then sends control commands to the magnetorheological damper 32 to adjust the magnitude of its damping force, thereby achieving precise control of the buffering process of the tool 44 assembly 4.

[0040] It also includes a moving component for driving the tool 44 assembly 4 to move linearly. The moving component includes a hydraulic cylinder 2 mounted on the engraving frame 1, and the output rod of the hydraulic cylinder 2 is connected to the drive motor 41. The hydraulic cylinder 2 is powered by the hydraulic system, driving the drive motor 41 and the tool 44 assembly 4 to move linearly along the linear guide rail 31 of the engraving frame 1, thereby realizing the feed motion of the tool 44 assembly 4 during the engraving process.

[0041] In practical application, this application installs a non-metallic engraving anti-collision device on an engraving machine. First, guide rails 31 are symmetrically mounted on the engraving machine frame 1 using bolts, ensuring that the direction of the guide groove 30 of the guide rail 31 is aligned with the axial direction of the tool 44 assembly 4. Then, the movable tool holder 33 is slidably connected to the guide groove 30 via a slider 34. A magnetorheological damper 32 is installed on the contact surface between the slider 34 and the guide groove 30. A permanent magnet 36 is installed at the bottom of the guide groove 30, and an induction coil 35 is installed at the bottom of the slider 34. Next, a drive motor 41 is mounted on the movable tool holder 33. The output shaft of the drive motor 41 is connected to the tool shaft 42. A gradient hardness composite elastic buffer sleeve 43 is fitted around the outside of the tool shaft 42, and the tool 44 is mounted at the end of the tool shaft 42. A proximity sensor 5 and a displacement sensor are installed at appropriate positions on the tool 44 assembly 4 and the engraving machine frame 1, respectively, to monitor the distance between the tool 44 and the workpiece and the axial displacement of the tool 44. The controller is installed inside the control box of the engraving machine and connected to the sensing system and the magnetorheological damper 32 via wires. The hydraulic cylinder 2 is mounted on the engraving machine frame 1, and its output rod is connected to the drive motor 41. The hydraulic system controls the feed motion of the tool 44 assembly 4.

[0042] During non-metallic engraving, the drive motor 41 rotates the cutter shaft 42 and the cutter 44, while the hydraulic cylinder 2 pushes the cutter 44 assembly 4 towards the workpiece. During engraving, the proximity sensor 5 monitors the distance between the cutter 44 and the workpiece in real time. When the cutter 44 approaches the workpiece, the controller adjusts the feed speed of the hydraulic cylinder 2 according to preset parameters to ensure engraving accuracy. When the cutter 44 collides with an irregular part of the workpiece surface, the cutter 44 assembly 4 is subjected to impact force. The movable tool holder 33 slides axially within the guide groove 30 via the slider 34, and the magnetorheological damper 32 generates damping force to buffer the impact force. Simultaneously, the displacement sensor detects the axial displacement change of the cutter 44 and transmits the signal to the controller. The controller adjusts the damping force of the magnetorheological damper 32 according to the displacement signal, achieving intelligent buffering of the impact force. The multi-level buffer structure of the gradient hardness composite elastic buffer sleeve 43 further absorbs the impact force, protecting the cutter 44 and the workpiece. When the slider 34 approaches the extreme position of the permanent magnet 36 at the bottom of the guide groove 30, the induction coil 35 generates a reverse electromagnetic force, which brakes the slider 34 and prevents the slider 34 from sliding excessively.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A collision prevention device for non-metallic engraving processing, characterized in that, The machine includes a carving frame (1), a buffer guide assembly (3), and a tool assembly (4). The tool assembly (4) includes a drive motor (41), a tool shaft (42), and a tool (44). The outer side of the tool shaft (42) is fitted with a gradient hardness composite elastic buffer sleeve (43). The buffer guide assembly (3) includes guide rails (31) symmetrically installed on the outer side of the tool shaft (42) and a movable tool holder (33) located between the two guide rails (31). The drive motor (41) is installed on the movable tool holder (33). The inner side of the guide rail (31) is provided with a guide groove (30). The movable tool holder (33) is slidably connected to the guide groove (30) through a slider (34). The contact surface between the slider (34) and the guide groove (30) is provided with a magnetorheological damper (32).

2. The anti-collision device for non-metallic engraving processing according to claim 1, characterized in that: A permanent magnet (36) is installed at the bottom of the guide groove (30), and an induction coil (35) is provided at the bottom of the slider (34) to cooperate with the permanent magnet (36). When the slider (34) approaches the extreme position of the permanent magnet (36), the induction coil (35) generates a reverse electromagnetic force.

3. The anti-collision device for non-metallic engraving processing according to claim 2, characterized in that: It also includes a controller and a sensing system, the sensing system including a proximity sensor (5) for monitoring the distance between the tool (44) and the workpiece and a displacement sensor (6) for measuring the axial displacement change of the tool (44), the sensing system and the magnetorheological damper (32) are both connected to the controller.

4. The anti-collision device for non-metallic engraving processing according to claim 3, characterized in that: The gradient hardness composite elastic buffer sleeve (43) includes a silicone rubber layer (433), a corrugated metal foil (432), and a polyurethane layer (431) arranged sequentially from the inside to the outside. The silicone rubber layer (433) has a Shore hardness of 40-50, and the polyurethane layer (431) has a Shore hardness of 70-80. The silicone rubber layer (433) is provided with a honeycomb-shaped shock-absorbing cavity (4330), with a hole diameter of 3-5mm near the cutter shaft (42) and a hole diameter of 8-10mm on the outer side.

5. The anti-collision device for non-metallic engraving processing according to claim 4, characterized in that: The output shaft of the drive motor (41) is connected to the cutter shaft (42), and the cutter (44) is connected to the cutter shaft (42).

6. The anti-collision device for non-metallic engraving processing according to claim 1, characterized in that: It also includes a moving component for driving the tool assembly (4) to move linearly, the moving component including a hydraulic cylinder (2) mounted on the engraving machine frame (1), the output rod of the hydraulic cylinder (2) being connected to the drive motor (41).

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