Hardware deburring process

Abstract

The embodiment of the present application provides a hardware part deburring process method, comprising the following steps: taking out the hardware part to be processed stored in a cold storage, and positioning and fixing the hardware part to be processed at a predetermined position; continuously spraying low-temperature medium to the hardware part to be processed for a first predetermined time, and simultaneously making multi-angle displacement motion of the hardware part to be processed, so as to perform cold brittle treatment on burrs on each surface of the hardware part to be processed; stopping the multi-angle displacement motion and the spraying of low-temperature medium, and resetting the hardware part to be processed to an initial state; polishing the surface of the hardware part to be processed by using a polishing robot, so that the burrs after brittle treatment fall off from the surface of the hardware part to be processed; moving the hardware part after deburring treatment from the fixed position, and then detecting the deburring effect. The method provided by the embodiment of the present application is particularly suitable for burr removal treatment of complex shape precision workpieces, and improves the deburring quality.

Description

Technical Field

[0001] This invention relates to the field of hardware processing technology, and in particular to a method for removing burrs from hardware parts. Background Technology

[0002] After metal parts undergo die casting, cutting, and other processing, burrs (also known as flash) are usually generated at the edges, holes, and parting surfaces of the workpiece. These burrs not only seriously affect the appearance quality of the product but also its assembly quality and can even cause injuries. Existing deburring methods mainly rely on fixed grinding wheels, which move the workpiece to complete the operation. However, the operating trajectory is narrow and can only meet the processing needs of simple surfaces. When dealing with workpieces with complex curved surfaces, holes, internal corners, and other special structures, there are a large number of processing blind spots, making it difficult to effectively handle them and adapt to the processing needs of irregularly shaped and high-precision metal parts. Summary of the Invention

[0003] The technical problem to be solved by the embodiments of the present invention is to provide a method for removing burrs from hardware parts.

[0004] To solve the above-mentioned technical problems, the embodiments of the present invention adopt the following technical solution: a method for removing burrs from hardware parts, comprising the following steps:

[0005] Take out the hardware parts to be processed from the cold storage, and position and fix the hardware parts to be processed in the predetermined position;

[0006] A low-temperature medium is continuously sprayed onto the hardware to be processed for a first predetermined duration, while the hardware to be processed undergoes multi-angle displacement movement to perform cold embrittlement treatment on the burrs on each surface of the hardware to be processed.

[0007] Stop the multi-angle displacement movement and spray the low-temperature medium, and reset the hardware to be processed to its initial state;

[0008] A grinding robot is used to grind the surface of the hardware to be treated, so that the brittle burrs are removed from the surface of the hardware to be treated.

[0009] The deburring process is then performed by removing the hardware parts from their fixed positions and inspecting the deburring effect.

[0010] Furthermore, the surface temperature of the hardware parts to be processed after resetting is monitored:

[0011] When the surface temperature of the metal part to be processed drops to the predetermined embrittlement temperature range, grinding is initiated.

[0012] If the surface temperature of the hardware part to be processed has not yet reached the predetermined embrittlement temperature range, then the multi-angle displacement motion and the spraying of low-temperature medium will be restarted for supplementary cooling and embrittlement.

[0013] Furthermore, after a second predetermined duration during the recooling and embrittlement process, the multi-angle displacement movement and the spraying of the low-temperature medium are stopped again, and the hardware is reset.

[0014] Furthermore, the cryogenic medium is liquid nitrogen, the injection speed is 80-150 m / s, and the predetermined embrittlement temperature range is -70°C to -50°C.

[0015] Furthermore, in the process of using a grinding robot to grind the surface of the hardware part to be processed, the grinding robot has grinding heads of different coarseness, which can be matched with different grinding heads according to the specifications of the hardware part and the characteristics of the burrs; the rotation speed of the grinding head is 8000-14000r / min.

[0016] Furthermore, the step of detecting the deburring effect specifically includes: sampling multiple pieces from the first batch of finished products for testing, and sampling a predetermined number of finished products for testing at preset intervals during subsequent production; using microscopic equipment to detect the deburring effect of the hardware parts during the testing process, and if residual burrs are detected, manually repairing the corresponding hardware parts, and re-inspecting them after repair until they pass the test.

[0017] Furthermore, after the hardware parts pass the burr effect test, they undergo rust prevention treatment and are then packaged and stored.

[0018] Furthermore, the multi-angle displacement motion of the hardware component to be processed specifically refers to circumferential rotation and up-and-down reciprocating oscillation motion; the rotational speed of the circumferential rotation is 5-10 r / min, and the maximum oscillation angle range of the up-and-down oscillation is 30°-60°.

[0019] Furthermore, in the process of spraying the low-temperature medium onto the hardware to be treated, two nozzles are used to spray the low-temperature medium onto the hardware to be treated, one nozzle spraying upwards onto the hardware and the other nozzle spraying downwards onto the hardware.

[0020] Furthermore, during the polishing process, the debris generated during polishing of the hardware parts and the gas generated by the low-temperature medium are extracted in real time.

[0021] By adopting the above technical solution, the embodiments of the present invention have at least the following beneficial effects: The embodiments of the present invention first remove the hardware parts to be processed from the cold storage, and position and fix the hardware parts to be processed in a predetermined position. In this step, the hardware parts are pre-treated with low temperature, which makes the burrs brittle, making the subsequent deburring process easier and more thorough, thus improving the deburring quality. Then, a low-temperature medium is continuously sprayed onto the hardware parts to be processed for a first predetermined duration, while simultaneously causing the hardware parts to undergo multi-angle displacement movement, in order to perform thermal embrittlement treatment on the burrs on each surface of the hardware parts. In this step, the low-temperature spraying process combined with the multi-angle displacement movement of the hardware parts enables the treatment of embrittlement on each surface of the hardware parts. Uniform cooling ensures that all burrs are kept within the ideal embrittlement temperature range. Then, the multi-angle displacement movement and low-temperature medium spraying are stopped, and the metal part to be treated is reset to its initial state. Next, a grinding robot is used to grind the surface of the metal part, causing the embrittled burrs to fall off. The use of a grinding robot with different sized grinding heads in this step enables automated and flexible deburring operations, adapting to workpieces of different shapes and sizes, reducing manual labor intensity, and improving production efficiency. Finally, the deburred metal part is removed from its fixed position, and the deburring effect is inspected to ensure effective burr removal. The method provided by this invention is particularly suitable for deburring complex-shaped precision workpieces. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a flowchart of an optional embodiment of the deburring process for hardware parts according to the present invention;

[0024] Figure 2 This is a flowchart of another optional embodiment of the hardware deburring process of the present invention. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present invention and are not intended to limit the present invention. Moreover, the embodiments and features in the embodiments of the present invention can be combined with each other unless otherwise specified.

[0026] Combination Figure 1As shown, an optional embodiment of the present invention provides a method for deburring hardware parts, including the following steps:

[0027] S10: Take out the hardware parts to be processed from the cold storage, and position and fix the hardware parts to be processed in the predetermined position; in this step, the hardware parts to be processed are aluminum alloy workpieces that have been die-cast or machined, the cold storage can be an ultra-low temperature cold storage, the cold storage temperature is set between -60℃ and -50℃, the hardware parts are stored in the cold storage for 30min-60min, and then the hardware parts are placed on a special fixture and clamped and fixed.

[0028] S20: A low-temperature medium is continuously sprayed onto the hardware to be processed for a first predetermined duration, while the hardware to be processed undergoes multi-angle displacement movement to perform cold-cooling and embrittlement treatment on the various surfaces of the hardware to be processed; in this step, after the hardware is taken out of the cold storage, it needs to be cooled by spraying a low-temperature medium; if the surface temperature of the workpiece is too high, it will lead to insufficient embrittlement of the burrs and affect the deburring effect. In addition, a special fixture can be fixed to the support platform, and the support platform can undergo multi-angle displacement movement, thereby driving the hardware on the fixture to move synchronously.

[0029] S30: Stop the multi-angle displacement movement and spray the low-temperature medium, and reset the hardware to be processed to the initial state; in this step, after the first predetermined time (30s-60s) is reached, stop spraying the low-temperature medium and the movement of the hardware, and reset the workpiece to the initial position that is convenient for grinding operation.

[0030] S40: A grinding robot is used to grind the surface of the hardware to be treated, so that the brittle burrs are removed from the surface of the hardware to be treated; in this step, a six-axis or multi-axis industrial robot is used as the grinding execution mechanism, and the end of the robot is equipped with a replaceable grinding head.

[0031] S50: Remove the deburring-treated hardware from its fixed position and then inspect the deburring effect. During this step, the treated hardware can be removed from the fixture manually or by a feeding device and then transferred by the operator to the inspection station.

[0032] In this embodiment of the invention, the hardware parts to be processed are first removed from the cold storage and positioned and fixed in a predetermined location. The hardware parts are pre-treated with a low temperature to make the burrs brittle, making the subsequent deburring process easier and more thorough, thus improving the deburring quality. Then, a low-temperature medium is continuously sprayed onto the hardware parts for a first predetermined duration, while simultaneously causing the hardware parts to undergo multi-angle displacement movement. This is used to perform a temperature-compensated embrittlement treatment on the burrs on various surfaces of the hardware parts. The combination of the low-temperature spraying process and the multi-angle displacement movement of the hardware parts ensures uniform cooling of all surfaces, guaranteeing the embrittlement of burrs on all parts. The burrs are kept within the ideal embrittlement temperature range by maintaining a constant temperature. Then, the multi-angle displacement movement and the spraying of the low-temperature medium are stopped, and the metal part to be treated is reset to its initial state. Next, a grinding robot is used to grind the surface of the metal part, causing the embrittled burrs to fall off. The use of a grinding robot with different sized grinding heads in this step enables automated and flexible deburring operations, adapting to workpieces of different shapes and sizes, reducing manual labor intensity, and improving production efficiency. Finally, the deburred metal part is removed from its fixed position, and the deburring effect is inspected to ensure effective burr removal. The method provided by this invention is particularly suitable for deburring complex-shaped precision workpieces.

[0033] In another embodiment of the invention, combined with Figure 2 As shown, the method further includes: S305, monitoring the surface temperature of the reset metal part to be processed.

[0034] When the surface temperature of the metal part to be processed drops to the predetermined embrittlement temperature range, grinding is initiated.

[0035] If the surface temperature of the hardware part to be processed has not yet reached the predetermined embrittlement temperature range, then the multi-angle displacement motion and the spraying of low-temperature medium will be restarted for supplementary cooling and embrittlement.

[0036] In this embodiment, infrared thermography is used to monitor the workpiece surface temperature in real time. When the workpiece surface temperature drops to the predetermined embrittlement temperature range, the burrs have been sufficiently embrittled, and the grinding process can be initiated. If the workpiece surface temperature has not yet reached the predetermined embrittlement temperature range, residual burrs are likely to be generated during the grinding process, and a supplementary cooling and embrittlement step needs to be performed.

[0037] In another embodiment of the invention, combined with Figure 2As shown, after a second predetermined duration during the re-cooling and embrittlement process, the multi-angle displacement movement and the spraying of the low-temperature medium are stopped again, and the hardware part is reset. In this embodiment, the re-cooling and embrittlement process lasts for a second predetermined duration (20s-30s), then the movement and spraying are stopped again, the workpiece is reset, and temperature monitoring is performed again. This cyclical approach ensures that the burrs are always in an optimal embrittlement state, avoiding incomplete deburring due to insufficient temperature.

[0038] In another embodiment of the invention, combined with Figure 1 As shown, the cryogenic medium is liquid nitrogen, the spraying speed is 80-150 m / s, and the predetermined embrittlement temperature range is -70°C to -50°C. In this embodiment, liquid nitrogen is used as the cryogenic medium. The liquid nitrogen is sprayed onto the workpiece surface through a high-pressure nozzle at a speed of 80-150 m / s, which can quickly reduce the temperature of the workpiece and burrs.

[0039] In another embodiment of the invention, combined with Figure 1 As shown, in the process of using a grinding robot to grind the surface of the hardware part to be processed, the grinding robot has grinding heads of different coarseness, which can be matched according to the specifications of the hardware part and the characteristics of the burrs; the rotation speed of the grinding head is 8000-14000 r / min. In this embodiment, the grinding heads have different specifications, such as coarse grinding heads, medium grinding heads, and fine grinding heads. The movement trajectory of the robot can be pre-programmed and matched according to the specifications of the hardware part and the size characteristics of the burrs, thereby covering all deburring parts of the workpiece (such as edges, holes, rounded corners, etc.).

[0040] In practice, for larger burrs, a coarse grinding head can be used for quick removal first, followed by fine finishing with a medium and fine grinding head to ensure surface quality. In practice, the grinding head speed is 8000-14000 r / min. Within this range, the cutting is stable and it is not easy to form impact marks or secondary burrs, effectively ensuring the removal of brittle burrs.

[0041] In another embodiment of the invention, combined with Figure 1 As shown, the steps for detecting the deburring effect specifically include: sampling multiple pieces from the first batch of finished products for inspection; and sampling a predetermined number of finished products for inspection at preset time intervals during subsequent production; the deburring effect of the hardware parts is detected using microscopic equipment during the inspection process. If residual burrs are detected, the corresponding hardware parts are manually repaired, and then re-inspected until the inspection is qualified. In this embodiment, the inspection process adopts a sampling inspection method: multiple pieces (e.g., 5-10 pieces) are sampled from the first batch of finished products for full inspection; and a predetermined number (e.g., 3-5 pieces) are sampled from the finished products for inspection at preset time intervals (e.g., every 2 hours) during subsequent production.

[0042] In practice, the testing equipment can be equipped with a high-powered microscope, and the deburring effect of the workpiece can be manually inspected to check whether the edges are smooth, whether the openings are free of burrs, and whether there are scratches on the surface. If residual burrs are detected, the corresponding hardware parts are manually repaired using tools such as files and sandpaper. After repair, the parts are re-inspected until they pass the test.

[0043] In another embodiment of the invention, combined with Figure 1 As shown, after the hardware parts pass the burr effect inspection, they undergo rust prevention treatment and are then packaged and stored. In this embodiment, the hardware parts are sprayed with rust-preventive oil and coated with rust inhibitor for rust prevention treatment. After the treatment is completed, they are packaged and stored in the warehouse.

[0044] In another embodiment of the invention, combined with Figure 1 As shown, the multi-angle displacement motion of the hardware part to be processed specifically involves circumferential rotation and reciprocating up-and-down oscillation. The rotational speed of the circumferential rotation is 5-10 r / min, and the maximum oscillation angle range of the up-and-down oscillation is 30°-60°. In this embodiment, the hardware part simultaneously performs circumferential rotation and reciprocating up-and-down oscillation under the drive of the moving platform. The rotational speed of the circumferential rotation is 5-10 r / min, and the maximum oscillation angle range of the up-and-down oscillation is 30°-60°. Through this combined motion, uniform cooling can be achieved on all surfaces of the workpiece.

[0045] In practical implementation, the mobile platform includes an outer fixed base, an inner rotating base, and a drive component. The outer fixed base is mounted on the equipment frame and remains stationary during operation. The inner rotating base is fitted inside the outer fixed base, with a clearance between them. A drive motor is connected to the bottom of the inner rotating base, which drives the entire inner rotating base to rotate around its center when the motor is working. A continuous annular inclined groove is formed on the inner wall of the outer fixed base, and guide rollers are mounted on the outer wall of the inner rotating base. The rollers slide smoothly within the inclined groove. During the rotation of the inner rotating base, the rollers travel along the slope of the inclined groove, thereby causing the inner rotating base to rotate and oscillate up and down simultaneously. The hardware components move along with the inner rotating base, ensuring that the low-temperature medium fully covers the surface of the workpiece, resulting in a uniform and consistent cooling effect.

[0046] In another embodiment of the invention, combined with Figure 1 As shown, in the process of spraying the cryogenic medium onto the metal part to be treated, two nozzles are used to spray the cryogenic medium onto the metal part. One nozzle sprays upwards onto the metal part, and the other nozzle sprays downwards onto the metal part. In this embodiment, two nozzles are used to spray liquid nitrogen onto the metal part. One nozzle sprays upwards onto the metal part, and the other nozzle sprays downwards onto the metal part, ensuring that all parts of the metal part receive sufficient cooling coverage, effectively improving cooling efficiency and uniformity.

[0047] In another embodiment of the present invention, multiple sets of clamping fixtures are arranged in a ring on the upper end face of the inner rotating seat, which can clamp multiple hardware parts to be processed at the same time, thereby completing the cooling and embrittlement and deburring processing of multiple workpieces at one time, greatly improving the work efficiency.

[0048] In another embodiment of the invention, combined with Figure 1 As shown, during the polishing process by the robotic arm, debris generated during polishing of the metal parts and gas generated by the low-temperature medium are extracted in real time. In this embodiment, during the polishing process, a dust extraction device is used to extract debris generated during polishing and nitrogen gas generated by liquid nitrogen vaporization in real time to maintain a clean working environment.

[0049] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many variations under the guidance of the present invention without departing from the spirit and scope of the claims. These variations are all within the scope of protection of the present invention.

Claims

1. A method for removing burrs from hardware parts, characterized in that, The method includes the following steps: Take out the hardware parts to be processed from the cold storage, and position and fix the hardware parts to be processed in the predetermined position; A low-temperature medium is continuously sprayed onto the hardware to be processed for a first predetermined duration, while the hardware to be processed undergoes multi-angle displacement movement to perform cold embrittlement treatment on the burrs on each surface of the hardware to be processed. Stop the multi-angle displacement movement and spray the low-temperature medium, and reset the hardware to be processed to its initial state; A grinding robot is used to grind the surface of the hardware to be treated, so that the brittle burrs are removed from the surface of the hardware to be treated. The deburring process is then performed by removing the hardware parts from their fixed positions and inspecting the deburring effect.

2. The method for deburring hardware parts according to claim 1, characterized in that, Surface temperature monitoring of the hardware parts to be processed after resetting: When the surface temperature of the metal part to be processed drops to the predetermined embrittlement temperature range, grinding is initiated. If the surface temperature of the hardware part to be processed has not yet reached the predetermined embrittlement temperature range, then the multi-angle displacement motion and the spraying of low-temperature medium will be restarted for supplementary cooling and embrittlement.

3. The method for deburring hardware parts according to claim 2, characterized in that, After the second predetermined duration of the cooling and embrittlement process, the multi-angle displacement movement and the spraying of the low-temperature medium are stopped again, and the hardware is reset.

4. The method for deburring hardware parts according to claim 2 or 3, characterized in that, The cryogenic medium is liquid nitrogen, the injection speed is 80-150 m / s, and the predetermined embrittlement temperature range is -70℃ to -50℃.

5. The method for deburring hardware parts according to claim 1, characterized in that, In the process of using a grinding robot to grind the surface of the hardware part to be processed, the grinding robot has grinding heads of different coarseness, and can match different grinding heads according to the specifications of the hardware part and the characteristics of the burrs; the rotation speed of the grinding head is 8000-14000r / min.

6. The method for deburring hardware parts according to claim 1, characterized in that, The steps for detecting the deburring effect specifically include: Multiple pieces of the first batch of finished products are sampled for testing. In subsequent production, a predetermined number of finished products are sampled for testing at preset intervals. During the testing process, a microscopic device is used to test the deburring effect of the hardware parts. If residual burrs are detected, the corresponding hardware parts are manually repaired. After repair, they are re-inspected until they pass the test.

7. The method for deburring hardware parts according to claim 6, characterized in that, After the hardware parts pass the burr effect test, they are then subjected to rust prevention treatment and packaged for storage.

8. The method for deburring hardware parts according to claim 1, characterized in that, The multi-angle displacement motion of the hardware to be processed specifically refers to circumferential rotation and up-and-down reciprocating swing motion; the rotational speed of the circumferential rotation is 5-10 r / min, and the maximum swing angle range of the up-and-down swing is 30°-60°.

9. The method for deburring hardware parts according to claim 1, characterized in that, In the process of spraying the low-temperature medium onto the hardware to be treated, two nozzles are used to spray the low-temperature medium onto the hardware to be treated, one nozzle sprays upwards onto the hardware and the other nozzle sprays downwards onto the hardware.

10. The method for deburring hardware parts according to claim 1, characterized in that, During the polishing process, the robotic arm continuously extracts debris generated during the polishing of metal parts and gas generated by the low-temperature medium.

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