Electric cabinet metal plate milling device

Abstract

The invention relates to an electric cabinet metal plate milling device which comprises a machine tool and a vacuum adsorption carrying table assembly of the machine tool. The assembly comprises an adsorption platform deck, a base and an integrated valve terminal, a negative pressure through hole in the adsorption platform deck is divided into a negative pressure concentration area and a central adsorption area, the bottom is connected with the integrated valve terminal through a pipe joint, and a proximity sensor is arranged on the outer side. Suction force of different areas is subjected to partition management through the integrated valve terminal, and the adsorption force can be dynamically adjusted according to the position of the milling cutter. When the milling cutter approaches, the valve opening degree of the corresponding area is adjusted through the integrated valve terminal, reasonable distribution of suction force is achieved, and the suction requirement of the milling cutter during machining at different positions of a thin plate can be met even if the total suction force is constant. In addition, a chip blowing mechanism is further arranged, chips can be blown away, false alarm of the sensor is prevented, machining reliability and efficiency are ensured, and the milling quality of the electric cabinet thin plate with the thickness being 1 mm is improved.

Description

Technical Field

[0001] The invention relates to the field of machine tool processing, and in particular to a sheet metal milling device for an electric cabinet. Background Art

[0002] In the field of electrical cabinet manufacturing, there are various processing technologies, among which sheet metal processing generally involves less milling technology, but it is also used in certain specific cases. When processing thin electrical cabinet plates, especially for trimming operations such as 1mm thick electrical cabinet plates, traditional processing methods usually use stamping, shearing and other methods, but these methods have limitations under some specific processing requirements. In order to obtain more refined processing effects, milling technology is sometimes introduced. However, traditional processing equipment faces many problems when performing milling processing of electrical cabinet thin plates. Traditional processing equipment often uses conventional suction tables to fix thin plates to facilitate milling operations. However, this conventional suction table exposes many shortcomings in actual applications.

[0003] First, during the milling process, various vibrations will be generated due to the high-speed rotation and cutting action of the milling cutter. Conventional suction tables are relatively simple in structure and function, and the suction force they provide is relatively fixed and uniform, and cannot be flexibly adjusted according to the position of the milling cutter and the processing conditions. For the thin plate of the electric cabinet with a thickness of only 1mm, its own rigidity is very weak. When affected by milling vibrations, the thin plate is easily displaced and deformed because the conventional suction table cannot effectively resist these vibrations. This will lead to a significant decrease in processing accuracy, and the processed products cannot meet the high quality requirements, seriously affecting the appearance and performance of the products.

[0004] Secondly, conventional suction tables can only achieve simple overall suction control, and their full-load negative pressure suction is generally constant. This means that no matter what state the thin plate is in during the milling process, its adsorption force will not change, and it is impossible to effectively distribute the adsorption force according to the position of the milling cutter and the force of the thin plate. In the milling operation, when the milling cutter cuts at different positions of the thin plate, the force on the thin plate is uneven, especially when trimming the edge of the thin plate, the local force is large, and the conventional suction table cannot dynamically adjust the adsorption force of the thin plate according to the position of the milling cutter. This makes the thin plate warp or shift due to insufficient local adsorption force while being subjected to the milling force, which greatly affects the processing effect and accuracy. For example, when the milling cutter is trimming the edge of the thin plate, because the force here is relatively large, and the conventional suction table cannot specifically increase the adsorption force in this area, the thin plate is prone to displacement in this area, resulting in uneven trimming or errors. Summary of the invention

[0005] Based on this, it is necessary to provide a sheet metal milling device for electric cabinets to solve the existing technical problems, forming a system with efficient suction zone control, stable structure, precise detection and good processing environment. From the zone design of the vacuum adsorption platform, the centralized control of the integrated valve island, the position detection of the proximity sensor, to various sealing and structural enhancement measures, a comprehensive solution is provided to improve the quality, precision and adsorption stability of the thin plate of the milling process.

[0006] In order to solve the problems of the prior art, the technical solution adopted by the present invention is: A sheet metal milling device for an electric cabinet includes a machine tool, wherein the machine tool has a vacuum adsorption platform assembly for sucking thin plates, the vacuum adsorption platform assembly includes an adsorption platform, a base fixedly arranged below the adsorption platform, and a plurality of integrated valve islands fixedly arranged on the base, the adsorption platform is provided with negative pressure through holes densely distributed in a matrix state, all the negative pressure through holes are divided into a plurality of negative pressure concentration areas at the parts close to the edge of the adsorption platform, and the remaining negative pressure through holes are located at the center of the adsorption platform and are divided into a plurality of central adsorption areas, each group of negative pressure concentration areas and each group of central adsorption areas are provided with a pipe joint for connecting the corresponding integrated valve island at the bottom, a circle of proximity sensors for detecting the approach of a milling cutter is provided on the outside of the adsorption platform, and each of the proximity sensors corresponds to the negative pressure concentration area at the outermost side of the adsorption platform and close thereto.

[0007] Furthermore, each group of the negative pressure concentration areas is composed of negative pressure through holes distributed in a 3x3 matrix, and the negative pressure concentration areas are divided into two groups. Each group of negative pressure concentration areas is arranged along the circumference of the adsorption platform to form a closed loop, and the two groups of negative pressure concentration areas are arranged inwardly into two circles along the edge of the adsorption platform, and all the central adsorption areas are distributed in a matrix state in the inner space of the negative pressure concentration area of ​​the inner circle.

[0008] Furthermore, the adsorption platform is composed of a table plate and a bottom plate, with a cavity left between the table plate and the bottom plate, and the cavity is divided into a number of exhaust chambers corresponding to the negative pressure concentration area and the central adsorption area by a grid plate net, all pipe joints are connected to the bottom of the bottom plate, and all pipe joints are connected to all negative pressure concentration areas and central adsorption areas in a one-to-one correspondence.

[0009] Furthermore, the number of the proximity sensors is consistent with the number of the negative pressure concentration areas in the outermost circle and is arranged one-to-one nearby. Each proximity sensor corresponds to the adjustment control signal detection of the electromagnetic regulating valve of the two negative pressure concentration areas extending inward vertically therefrom.

[0010] Furthermore, the proximity sensor is an inductive sensor with a detection range of 5 mm, wherein the distance between the lower end of the milling cutter and the proximity sensor is less than 5 mm when the milling cutter is trimming, and the distance between the thin plate located on the top of the adsorption platform and the proximity sensor is greater than 5 mm, and a chip blowing mechanism that moves synchronously with the milling cutter is provided on the side of the milling cutter.

[0011] Furthermore, a frame-shaped sensor bracket formed by four strip plates fixedly connected is arranged on the outer side of the adsorption platform, and all the proximity sensors are fixedly arranged at corresponding positions on the frame-shaped sensor bracket.

[0012] Furthermore, a limit drag frame is fixedly provided on the bottom of the adsorption platform, and a first flange extending upward and supporting the frame-shaped sensor bracket is formed at the top outer edge of the limit drag frame. The limit drag frame is fixedly connected to the base by a plurality of connecting columns.

[0013] Furthermore, the grille mesh is clamped between the table and the bottom plate, and the facing sides of the table and the bottom plate are formed with embedding grooves for embedding the upper and lower sides of the grille mesh, and sealing gaskets matching the network shape of the grille mesh are arranged in the two embedding grooves.

[0014] Furthermore, a second flange is formed at the bottom edge of the base plate for upward embedding into the inner edge of the bottom of the table plate, a rectangular sealing ring is embedded inside the second flange, and all the negative pressure concentration areas are located on the inner side of the rectangular sealing ring.

[0015] Furthermore, the grid plate net is formed by a plurality of warp bars and a plurality of weft bars embedded in each other, each of the warp bars and weft bars is formed with a plurality of embedded openings, and the bottoms of both ends of the warp bars and weft bars are formed with pressure openings for pressing the rectangular sealing ring downward.

[0016] Compared with the prior art, the present invention has the following beneficial effects: First, the electric cabinet sheet metal milling device of the present invention divides the negative pressure through hole into a negative pressure concentration area and a central adsorption area through its unique vacuum adsorption platform assembly, and is precisely controlled by an integrated valve island, and can adjust the suction force in real time according to the position of the milling cutter. Compared with conventional suction platforms, it can better resist vibrations during milling, effectively prevent 1mm thick plates from displacement and deformation during milling, and significantly improve processing accuracy and quality. It ensures that the thin plate remains stable during milling by finely adjusting the suction force in different areas of the thin plate, avoiding thin plate quality problems caused by vibration, and provides a reliable foundation for fine processing; Secondly, the device uses an integrated valve island to manage the suction force in different areas and accurately adjust the suction force according to the position of the milling cutter, overcoming the defect that conventional suction tables can only control the overall suction force. The suction force of the thin plate can be dynamically adjusted according to the position of the milling cutter, providing suitable suction strength for the thin plate at different processing positions, especially when trimming the edges, which can better fix the thin plate and ensure the stability and accuracy of the processing. Unlike conventional suction tables that have a constant total suction force but cannot reasonably distribute the suction force, this device can enhance the suction force in front of the milling cutter in advance and delay the release of the suction force behind the milling cutter according to the movement of the milling cutter, ensuring that the thin plate is always subjected to appropriate suction force during the entire milling process, thereby improving the adaptability and flexibility of the processing. Under the condition of constant total suction force, the integrated valve island dynamically adjusts the valve opening of different areas, realizing the reasonable and effective distribution of suction between different negative pressure concentration areas and the central suction area, ensuring the force balance of different areas of the thin plate during the milling process, avoiding local processing defects caused by uneven force, and ensuring stable adsorption and precise processing of the thin plate even under complex milling operations; Third, a chip blowing mechanism is provided, which can not only blow away the chips generated during the milling process and avoid the influence of chip accumulation on the thin plate adsorption and processing accuracy, but also prevent the chips from interfering with the proximity sensor and avoiding sensor false alarms. Compared with conventional suction tables, this is more conducive to maintaining the cleanliness of the processing environment and the accuracy of the detection system, ensuring the reliability and efficiency of the entire processing process. Moreover, through the precise setting of the sensor and the corresponding control logic, the position of the milling cutter can be better detected and coordinated with the suction control, avoiding processing errors caused by chip problems and sensor misjudgment, and ensuring the smooth progress of processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the present invention; Figure 2 It is a planar cross-sectional structural diagram of the present invention; Figure 3 It is a three-dimensional structural exploded diagram of the present invention; Figure 4 Schematic diagram of the bottom three-dimensional structure of the adsorption platform; Figure 5 yes Figure 4 Schematic diagram of the three-dimensional decomposition of Figure 6 It is a three-dimensional structural diagram of the table plate and the bottom plate; Figure 7 It is a schematic diagram of the three-dimensional structure decomposition of the adsorption carrier; Figure 8 It is a schematic diagram of the three-dimensional structure of the grille plate mesh; Fig. 9 yes Figure 8 A schematic diagram of the structure enlargement at point A; Fig.10 It is a schematic diagram of the inner three-dimensional structure of the table top; Fig.11 It is a schematic diagram of the local structure of the inner surface of the table; The numbers in the figure are: 1-thin plate; 2-adsorption platform; 3-base; 4-integrated valve island; 5-negative pressure concentration area; 6-central adsorption area; 7-pipe joint; 8-milling cutter; 9-proximity sensor; 10-table; 11-bottom plate; 12-grid plate mesh; 13-exhaust chamber; 14-frame sensor bracket; 15-limiting drag frame; 16-first flange; 17-connecting column; 18-embedded groove; 19-sealing gasket; 20-second flange; 21-rectangular sealing ring; 22-meridional grid; 23-latitudinal grid; 24-embedded mouth; 25-pressing mouth. DETAILED DESCRIPTION

[0018] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] Reference Figures 1 to 11 , a sheet metal milling device for an electric cabinet, including a machine tool, the machine tool having a vacuum adsorption platform assembly for sucking a thin plate 1, the vacuum adsorption platform assembly including an adsorption platform 2, a base 3 fixedly arranged below the adsorption platform 2, and a plurality of integrated valve islands 4 fixedly arranged on the base 3, the adsorption platform 2 is provided with negative pressure through holes densely distributed in a matrix state, all the negative pressure through holes are divided into a plurality of negative pressure concentration areas 5 near the edge of the adsorption platform 2, and the remaining negative pressure through holes are located at the center of the adsorption platform 2 and are divided into a plurality of central adsorption areas 6, each group of negative pressure concentration areas 5 and each group of central adsorption areas 6 are provided with a pipe joint 7 for connecting the corresponding integrated valve island 4 at the bottom, the outer side of the adsorption platform 2 is provided with a circle of proximity sensors 9 for detecting the approach of a milling cutter 8, and each of the proximity sensors 9 corresponds to the negative pressure concentration area 5 at the outermost side of the adsorption platform 2 and close to it.

[0020] The core of the electric cabinet sheet metal milling device lies in the vacuum adsorption platform assembly in its machine tool. The machine tool is the basic platform for the entire milling operation, and the vacuum adsorption platform assembly is used to suck the thin plate 1 tightly to provide stable fixation of the thin plate 1 for the milling operation. The vacuum adsorption platform assembly includes an adsorption platform 2, a base 3 and several groups of integrated valve islands 4. The negative pressure through holes densely distributed in a matrix state on the adsorption platform 2 are the key structures for realizing vacuum adsorption. By generating negative pressure at these through holes, the thin plate 1 is tightly adsorbed on the platform.

[0021] In order to achieve suction control in different areas, some negative pressure through holes near the edge of the adsorption platform 2 are divided into several groups of negative pressure concentrated areas 5, and the remaining negative pressure through holes located at the center of the adsorption platform 2 are divided into several groups of central adsorption areas 6. The purpose of this division is to adjust the suction of different areas more specifically according to the position of the milling cutter 8, because during the milling process, the edge part is often the area where the milling cutter 8 moves frequently, requiring more precise suction control, while the suction demand of the central area is relatively stable.

[0022] A pipe joint 7 is provided at the bottom of each negative pressure concentration area 5 and the central adsorption area 6 for connecting to the corresponding integrated valve island 4. The integrated valve island 4 is a device that centrally controls multiple valves, and it can efficiently manage and adjust the suction of each area. Under the condition that the suction of the traditional negative pressure source is constant under full load, the present device can achieve a reasonable distribution of suction through the adjustment function of the integrated valve island 4. When the thin plate 1 is placed on the adsorption carrier 2, the vacuum pump is turned on, and the gas is extracted through the negative pressure through hole. Since the integrated valve island 4 controls the negative pressure through hole groups in different areas, different areas of the thin plate 1 can achieve different degrees of adsorption according to the processing requirements, providing a stable thin plate 1 fixing environment for milling operations.

[0023] When it is necessary to increase the suction force near the position of the milling cutter 8 (for example, when the milling cutter 8 is performing trimming operations, in order to ensure the stability of the thin plate 1 in this area and prevent the thin plate 1 from shifting due to the milling force), the integrated valve island 4 will open the valve in the corresponding area accordingly, increase the opening of the area, and allow more gas to be discharged from the negative pressure through hole in the area, thereby increasing the suction force in the area. However, since the total suction force is limited by the negative pressure source, when the suction force near the position of the milling cutter 8 increases, the integrated valve island 4 will simultaneously reduce the valve opening of other areas, so that the suction force in these areas is reduced accordingly, to ensure that the total suction force remains within the full load suction range of the negative pressure source. In this way, even when the full load suction force of the negative pressure source is constant, the suction force in different areas can be dynamically adjusted according to the position of the milling cutter 8, so that the thin plate 1 always obtains the appropriate adsorption force during the milling process, and the stability of the thin plate 1 under different processing conditions is ensured.

[0024] A circle of proximity sensors 9 is arranged on the outside of the adsorption platform 2, and the function of these sensors is to detect the approach of the milling cutter 8. Each proximity sensor 9 corresponds to the negative pressure concentration area 5 which is close to the outermost side of the adsorption platform 2. When the milling cutter 8 approaches a certain area, the corresponding proximity sensor 9 can sense it, and provide a basis for the subsequent adjustment of the suction force of the area. For example, in the suction control scheme discussed previously, when the milling cutter 8 approaches a certain area to prepare for trimming operation, the sensor signal can trigger the integrated valve island 4 to adjust the suction force of the corresponding negative pressure concentration area 5, thereby enhancing the adsorption force of the area and ensuring the stability of the thin plate 1 during milling.

[0025] This suction adjustment method has significant advantages over the existing situation where only conventional suction tables are used and the suction of the negative pressure source is constant when fully loaded and the suction cannot be reasonably distributed. It can flexibly adjust the suction force of different areas of the thin plate 1 according to the position of the milling cutter 8 and the processing state, avoiding the displacement and deformation of the thin plate 1 due to insufficient local suction force when the milling cutter 8 operates on the thin plate 1 locally, ensuring the smooth progress of the entire milling process and improving the processing quality. At the same time, through the dynamic adjustment of the suction force in different areas, it can also better adapt to thin plates 1 of different shapes, sizes and processing requirements, improving the versatility and adaptability of the equipment.

[0026] Each group of the negative pressure concentration areas 5 is composed of negative pressure through holes distributed in a 3x3 matrix. The negative pressure concentration areas 5 are divided into two groups. Each group of negative pressure concentration areas 5 is arranged along the circumference of the adsorption platform 2 to form a closed loop. The two groups of negative pressure concentration areas 5 are arranged inwardly into two circles along the edge of the adsorption platform 2, and all the central adsorption areas 6 are distributed in a matrix state in the inner space of the negative pressure concentration area 5 of the inner circle.

[0027] Each group of negative pressure concentration areas 5 is composed of negative pressure through holes distributed in a 3x3 matrix. This design makes the suction control of each negative pressure concentration area 5 more refined and also facilitates management and layout. The negative pressure concentration areas 5 are divided into two groups. Each group of negative pressure concentration areas 5 is arranged along the circumference of the adsorption platform 2 to form a closed loop. The two groups of negative pressure concentration areas 5 are arranged inwardly into two circles along the edge of the adsorption platform 2, forming a more regular edge suction control layout. Such a layout can make the edge suction adjustment more orderly and efficient.

[0028] When the milling cutter 8 performs trimming along the edge of the adsorption carrier 2, since the edge is divided into two circles of negative pressure concentration areas 5, and each concentration area is controlled by a corresponding valve and integrated valve island 4, the suction of the two circles of negative pressure concentration areas 5 can be accurately controlled according to the specific position of the milling cutter 8 through the detection of the proximity sensor 9. For example, when the milling cutter 8 performs trimming in the negative pressure concentration area 5 close to the outermost circle, the proximity sensor 9 in this area can detect the approach of the milling cutter 8 in time, thereby triggering the corresponding integrated valve island 4 to adjust the valve opening, increase the suction of the area, and prevent the thin plate 1 from being displaced due to the cutting force of the milling cutter 8 when trimming the edge.

[0029] The central adsorption area 6 is distributed in a matrix state in the inner space of the negative pressure concentration area 5 of the inner circle. Since the central area is relatively stable during the milling process, this layout concentrates the central adsorption area 6 together and uses fewer valves and pipe joints 7 for control. It can not only meet the adsorption demand of the central area of ​​the thin plate 1, but also simplify the suction control structure of the central area, avoid equipping each negative pressure through hole with a valve separately, and reduce the complexity and cost of the system.

[0030] The adsorption platform 2 is composed of a table plate 10 and a bottom plate 11, with a cavity left between the table plate 10 and the bottom plate 11, and the cavity is divided into a plurality of exhaust chambers 13 corresponding to the negative pressure concentration areas 5 and the central adsorption areas 6 by a grid plate mesh 12, all pipe joints 7 are connected to the bottom of the bottom plate 11, and all pipe joints 7 are connected to all negative pressure concentration areas 5 and the central adsorption areas 6 in a one-to-one correspondence.

[0031] The adsorption platform 2 is composed of a platform 10 and a bottom plate 11, with a cavity between the two, which is divided into a plurality of suction chambers 13 corresponding to the negative pressure concentration area 5 and the central adsorption area 6 by a grid plate net 12. The grid plate net 12 plays the role of separating the space, separating the negative pressure through holes in different areas, so that the negative pressure channel in each area is relatively independent, which is conducive to separate suction control of different areas.

[0032] All the pipe joints 7 are connected to the bottom of the bottom plate 11, and are connected to the negative pressure concentration area 5 and the central adsorption area 6 in a one-to-one correspondence. When the vacuum pump is working, the gas is extracted from the gap between the thin plate 1 and the platen 10, enters the corresponding exhaust chamber 13 through the negative pressure through hole, and then enters the integrated valve island 4 through the pipe joint 7, and is finally extracted by the vacuum pump. Since the exhaust chamber 13 corresponds to the negative pressure concentration area 5 and the central adsorption area 6 in a one-to-one correspondence, it can ensure that the suction force of each area can be independently controlled through the corresponding integrated valve island 4.

[0033] The sealing gasket 19 is arranged in the groove 18 on the opposite side of the table 10 and the bottom plate 11, and the shape of the sealing gasket 19 matches the network shape of the grid plate net 12, which can ensure the sealing of the vacuum chamber 13. In the vacuum adsorption process, good sealing is crucial. The sealing gasket 19 can prevent gas leakage from between the vacuum chambers 13, ensure that each vacuum chamber 13 can form a stable negative pressure environment, and improve the accuracy and effectiveness of suction control. Without the sealing gasket 19, air may flow between different vacuum chambers 13, affecting the zoning control effect of suction, resulting in uneven adsorption of the thin plate 1.

[0034] The number of the proximity sensors 9 is consistent with the number of the negative pressure concentration areas 5 in the outermost circle and is arranged one by one nearby. Each proximity sensor 9 corresponds to the adjustment control signal detection of the electromagnetic regulating valves of the two negative pressure concentration areas 5 extending vertically inward therefrom.

[0035] The number of proximity sensors 9 is consistent with the number of the outermost circle of negative pressure concentration areas 5 and is arranged one-to-one. This one-to-one correspondence enables the sensor to accurately reflect the positional relationship between the milling cutter 8 and the outermost negative pressure concentration area 5. Each proximity sensor 9 corresponds to the adjustment control signal detection of the electromagnetic regulating valve of the two negative pressure concentration areas 5 extending inward vertically therefrom. The purpose of this design is to control the suction force in advance and delay.

[0036] When the milling cutter 8 approaches a certain proximity sensor 9, the sensor detects the approach of the milling cutter 8 and can send a signal to the control system. According to the signal, the control system not only adjusts the electromagnetic regulating valve of the negative pressure concentration area 5 corresponding to the sensor, but also controls the electromagnetic regulating valve of another negative pressure concentration area 5 extending inward at the same time. For example, when the milling cutter 8 approaches a proximity sensor 9, the control system can open the electromagnetic regulating valve of a negative pressure concentration area 5 in front of the milling cutter 8 in advance to increase the suction force, and delay the closing of the electromagnetic regulating valve of another negative pressure concentration area 5 behind the milling cutter 8, so that the thin plate 1 can always be effectively adsorbed during the movement of the milling cutter 8, avoiding displacement or deformation of the thin plate 1 due to insufficient adsorption force at the edge due to the movement of the milling cutter 8, thereby improving the stability and processing accuracy of the thin plate 1 during the milling process.

[0037] The proximity sensor 9 is an inductive sensor with a detection range of 5 mm. When the milling cutter 8 is trimming, the distance between its lower end and the proximity sensor 9 is less than 5 mm, and the distance between the thin plate 1 located on the top of the adsorption platform 2 and the proximity sensor 9 is greater than 5 mm. A chip blowing mechanism that moves synchronously with the milling cutter 8 is provided on the side of the milling cutter 8.

[0038] The proximity sensor 9 is an inductive sensor with a detection range of 5mm. When the milling cutter 8 is trimming, the distance between its lower end and the proximity sensor 9 is less than 5mm, so that the milling cutter 8 enters the effective detection range of the proximity sensor 9, thereby triggering the corresponding suction adjustment operation. The distance between the thin plate 1 located on the top of the adsorption platform 2 and the proximity sensor 9 is greater than 5mm. This design ensures that the sensor will not generate false signals due to the presence of the thin plate 1, and only responds to the approach of the milling cutter 8.

[0039] Before the thin plate 1 is placed on the adsorption stage 2, a cutting allowance is reserved for trimming. This design is very critical because if the cutting allowance is not reserved, the milling cutter 8 may cut the adsorption stage 2 during the trimming operation, thereby damaging the equipment. The reserved cutting allowance means that when the milling cutter 8 is trimming, only the excess part of the thin plate 1 that exceeds the adsorption stage 2 is processed, without affecting the adsorption stage 2 itself.

[0040] The synchronously moving chip blowing mechanism arranged beside the milling cutter 8 has an important dual role. First, a large amount of chips will be generated during the milling process. If these chips are not cleaned up in time, they will have a negative impact on the processing quality. The chip blowing mechanism can blow the chips generated by milling away from the processing area to prevent the chips from accumulating on the thin plate 1, affecting the fit between the thin plate 1 and the adsorption carrier 2, and further affecting the adsorption effect of the thin plate 1 and the accuracy of the milling process. For example, chip accumulation may cause a gap between the thin plate 1 and the adsorption carrier 2, destroying the vacuum adsorption environment, affecting the stable adsorption of the thin plate 1, and may even cause the thin plate 1 to shift during the milling process, affecting the processing accuracy.

[0041] Secondly, the chip blowing mechanism also helps to avoid false alarms from the sensor. Although the chips may be small and fine and not necessarily within the detection range of the sensor, during the milling process, these chips may approach or float towards the proximity sensor 9 due to factors such as electrostatic adsorption and airflow disturbance. If the chips adhere to the sensing area of ​​the proximity sensor 9, they may interfere with the sensor's detection of the milling cutter 8, causing the sensor to falsely alarm. The chip blowing mechanism continuously blows away the chips to keep the area around the proximity sensor 9 clean, ensuring that the sensor can accurately detect the approach of the milling cutter 8, avoiding sending erroneous signals to the control system due to chip interference, and ensuring the reliability of the suction control and processing of the entire milling device. When the sensor can accurately detect the position of the milling cutter 8, the control system can adjust the suction of the corresponding negative pressure concentration area 5 in time according to the correct position signal, so that when the thin plate 1 is trimmed by the milling cutter 8, the suction of the edge area can be accurately adjusted according to the change in the position of the milling cutter 8, ensuring the stability and processing accuracy of the thin plate 1 during the processing.

[0042] Since the thin plate 1 has reserved cutting allowance, the milling cutter 8 can accurately remove the excess part of the thin plate 1 without damaging the adsorption carrier 2 during the trimming process. At the same time, combined with the suction zoning control of the adsorption carrier 2 and the role of the chip blowing mechanism, the entire processing process can be carried out safely, stably and efficiently. The adsorption carrier 2 can provide a stable adsorption force for the thin plate 1, so that the thin plate 1 remains fixed during the processing, and the chip blowing mechanism can ensure the cleanliness of the processing environment and the accurate detection of the sensor, providing good conditions for the precise trimming operation of the milling cutter 8, avoiding interference with the processing process due to factors such as chips, displacement of the thin plate 1 or sensor false alarms, thereby improving the processing quality of the electric cabinet sheet metal and the service life of the equipment.

[0043] A frame-shaped sensor bracket 14 formed by four strip plates being fixedly connected is disposed on the outer side of the adsorption platform 2 , and all the proximity sensors 9 are fixedly disposed at corresponding positions on the frame-shaped sensor bracket 14 .

[0044] A frame-shaped sensor bracket 14 formed by four strip plates is provided on the outside of the adsorption platform 2, and all proximity sensors 9 are fixedly arranged at corresponding positions on the frame-shaped sensor bracket 14. Such a frame-shaped sensor bracket 14 provides a stable mounting structure for the proximity sensor 9, so that the sensor can be firmly mounted on the outside of the adsorption platform 2, and the position of the sensor can be reasonably arranged according to the motion range of the milling cutter 8 and the shape of the adsorption platform 2.

[0045] By fixing the proximity sensor 9 on the frame-shaped sensor bracket 14, the position accuracy and stability of the sensor when detecting the approach of the milling cutter 8 are ensured. At the same time, this fixing method is convenient for installing and adjusting the position and angle of the sensor, so that the sensor can better detect the position of the milling cutter 8, avoiding detection errors caused by looseness or position deviation of the sensor, and ensuring the reliability and accuracy of the suction control of the entire milling device.

[0046] A limit frame 15 is fixedly provided at the bottom of the adsorption platform 2, and a first flange 16 extending upward and supporting the frame-shaped sensor bracket 14 is formed at the top outer edge of the limit frame 15. The limit frame 15 is fixedly connected to the base 3 by a plurality of connecting columns 17.

[0047] A limit drag frame 15 is fixedly provided at the bottom of the adsorption platform 2, and a first flange 16 extending upward and supporting the frame-shaped sensor bracket 14 is formed at the top outer edge of the limit drag frame 15. This design supports the frame-shaped sensor bracket 14 and keeps it at a suitable height and position, so that the sensor can detect the milling cutter 8.

[0048] The limit drag frame 15 is fixedly connected to the base 3 by a number of connecting columns 17, which ensures the stability of the entire structure. It not only provides support for the sensor bracket, but also organically connects the adsorption platform 2, the base 3 and the sensor bracket to form a stable whole. During the milling process, the machine tool will generate vibration and impact force. This stable structure can prevent relative displacement between the components, ensure the reliability and service life of the entire device, and ensure that the proximity sensor 9 and other components always maintain the correct position and function during the working process.

[0049] The grid plate net 12 is sandwiched between the table top 10 and the bottom plate 11. The table top 10 and the bottom plate 11 have facing sides formed with embedding grooves 18 for embedding the upper and lower sides of the grid plate net 12. The two embedding grooves 18 are each provided with a sealing gasket 19 matching the network shape of the grid plate net 12.

[0050] The grille mesh 12 is sandwiched between the table 10 and the bottom plate 11, and the table 10 and the bottom plate 11 are formed with embedding grooves 18 on the sides facing each other for embedding the upper and lower sides of the grille mesh 12, so as to ensure the secure installation of the grille mesh 12. At the same time, the sealing gasket 19 matched with the network shape of the grille mesh 12 is arranged in the embedding groove 18, further enhancing the sealing performance of the structure.

[0051] The sealing gasket 19 plays a key role in this structure. It can prevent air from entering the vacuum chamber 13 from the gap between the grid plate 12 and the table plate 10 or the bottom plate 11, avoiding gas mixing between different vacuum chambers 13 and ensuring the independence of each vacuum chamber 13, thereby ensuring that the suction control of each negative pressure concentration area 5 and the central adsorption area 6 is not disturbed, making the suction zoning control of the entire vacuum adsorption system more precise and effective.

[0052] A second flange 20 is formed at the bottom edge of the bottom plate 11 for upward embedding into the bottom inner edge of the table top 10 . A rectangular sealing ring 21 is embedded inside the second flange 20 . All the negative pressure concentration areas 5 are located inside the rectangular sealing ring 21 .

[0053] A second flange 20 is formed at the bottom edge of the bottom plate 11 for upward embedding into the bottom inner edge of the platform 10 . This structural design enhances the connection stability between the platform 10 and the bottom plate 11 , and also helps to improve the overall strength of the entire adsorption platform 2 .

[0054] A rectangular sealing ring 21 is embedded inside the second flange 20, and all negative pressure concentration areas 5 are located inside the rectangular sealing ring 21. The function of the rectangular sealing ring 21 is to prevent outside air from entering the adsorption area from the bottom edge of the adsorption platform 2. If there is no rectangular sealing ring 21, outside air may penetrate from the bottom edge, destroying the vacuum environment and affecting the adsorption effect of the thin plate 1. By placing the negative pressure concentration area 5 inside the rectangular sealing ring 21, it can be ensured that the vacuum adsorption process in these areas is not disturbed by the outside air, thereby ensuring the adsorption stability of the thin plate 1 on the adsorption platform.

[0055] The grid plate net 12 is formed by a plurality of warp bars 22 and a plurality of weft bars 23 that are embedded with each other, each of the warp bars 22 and the weft bars 23 is formed with a plurality of inlays 24, and the bottoms of both ends of the warp bars 22 and the weft bars 23 are formed with pressing holes 25 for pressing the rectangular sealing ring 21 downward.

[0056] The grid plate net 12 is formed by a plurality of warp bars 22 and a plurality of weft bars 23 that are interlocked with each other. A plurality of inlays 24 are formed on each warp bar 22 and each weft bar 23. This structure gives the grid plate net 12 certain strength and stability, and can well separate different exhaust chambers 13.

[0057] The bottoms of both ends of the warp lattice strips 22 and the weft lattice strips 23 are formed with press ports 25 for pressing the rectangular sealing ring 21 downwards. The press ports 25 can make the rectangular sealing ring 21 better fit the inner side of the second flange 20, further enhancing the sealing effect of the sealing ring. Through these press ports 25, it can be ensured that the rectangular sealing ring 21 will not shift or deform when used for a long time or subjected to vibration, ensuring the durability of the sealing effect, helping to maintain a stable vacuum adsorption environment, ensuring the stable adsorption of the thin plate 1 and the smooth progress of the milling process.

[0058] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A sheet metal milling device for an electric cabinet, comprising a machine tool, characterized in that: The machine tool has a vacuum adsorption platform assembly for sucking a thin plate (1), the vacuum adsorption platform assembly comprising an adsorption platform (2), a base (3) fixedly arranged below the adsorption platform (2), and a plurality of integrated valve islands (4) fixedly arranged on the base (3); the adsorption platform (2) is provided with negative pressure through holes densely distributed in a matrix state; all the negative pressure through holes are divided into a plurality of negative pressure concentration areas (5) at the portion close to the edge of the adsorption platform (2); the remaining negative pressure through holes are divided into a plurality of central adsorption areas (6) at the center of the adsorption platform (2); a pipe joint (7) for connecting a corresponding integrated valve island (4) is provided at the bottom of each group of negative pressure concentration areas (5) and each group of central adsorption areas (6); a circle of proximity sensors (9) for detecting the approach of a milling cutter (8) is provided on the outer side of the adsorption platform (2); each of the proximity sensors (9) corresponds to the negative pressure concentration area (5) at the outermost side of the adsorption platform (2) and close thereto.

2. The electric cabinet sheet metal milling device according to claim 1, characterized in that: Each group of the negative pressure concentration areas (5) is composed of negative pressure through holes distributed in a 3x3 matrix. The negative pressure concentration areas (5) are divided into two groups. Each group of negative pressure concentration areas (5) is arranged along the circumference direction of the adsorption carrier (2) to form a closed loop. The two groups of negative pressure concentration areas (5) are arranged inwardly along the edge of the adsorption carrier (2) to form two circles. All the central adsorption areas (6) are distributed in a matrix state in the inner space of the negative pressure concentration area (5) of the inner circle.

3. The electric cabinet sheet metal milling device according to claim 2, characterized in that: The adsorption platform (2) is composed of a platform (10) and a bottom plate (11), a cavity is left between the platform (10) and the bottom plate (11), the cavity is divided into a plurality of exhaust chambers (13) corresponding to the negative pressure concentration areas (5) and the central adsorption areas (6) by a grid plate net (12), all pipe joints (7) are connected to the bottom of the bottom plate (11), and all pipe joints (7) are connected to all negative pressure concentration areas (5) and the central adsorption areas (6) in a one-to-one correspondence.

4. The electric cabinet sheet metal milling device according to claim 3, characterized in that: The number of the proximity sensors (9) is consistent with the number of the negative pressure concentration areas (5) in the outermost circle and is arranged one by one in a nearby location. Each proximity sensor (9) detects the regulating control signal of the electromagnetic regulating valve corresponding to the two negative pressure concentration areas (5) extending inwardly vertically therefrom.

5. The electric cabinet sheet metal milling device according to claim 4, characterized in that: The proximity sensor (9) is an inductive sensor with a detection range of 5 mm. When the milling cutter (8) is trimming, the distance between its lowermost end and the proximity sensor (9) is less than 5 mm, and the distance between the thin plate (1) located on the top of the adsorption platform (2) and the proximity sensor (9) is greater than 5 mm. A chip blowing mechanism that moves synchronously with the milling cutter (8) is provided on the side of the milling cutter (8).

6. The electric cabinet sheet metal milling device according to claim 1, characterized in that: A frame-shaped sensor bracket (14) formed by four strip plates being fixedly connected is arranged on the outer side of the adsorption carrier (2), and all the proximity sensors (9) are fixedly arranged at corresponding positions on the frame-shaped sensor bracket (14).

7. The electric cabinet sheet metal milling device according to claim 6, characterized in that: A limit drag frame (15) is fixedly provided at the bottom of the adsorption platform (2), and a first flange (16) extending upward and supporting the frame-shaped sensor bracket (14) is formed at the top outer edge of the limit drag frame (15), and the limit drag frame (15) is fixedly connected to the base (3) via a plurality of connecting columns (17).

8. The electric cabinet sheet metal milling device according to claim 3, characterized in that: The grille mesh (12) is sandwiched between the tabletop (10) and the bottom plate (11); the tabletop (10) and the bottom plate (11) are formed with embedding grooves (18) on the sides facing each other for embedding the upper and lower sides of the grille mesh (12); and sealing gaskets (19) matching the network shape of the grille mesh (12) are arranged in the two embedding grooves (18).

9. The electric cabinet sheet metal milling device according to claim 3, characterized in that: A second flange (20) is formed at the bottom edge of the bottom plate (11) for embedding upward into the inner edge of the bottom of the table plate (10), a rectangular sealing ring (21) is embedded inside the second flange (20), and all the negative pressure concentration areas (5) are located inside the rectangular sealing ring (21).

10. The electric cabinet sheet metal milling device according to claim 9, characterized in that: The grid plate net (12) is formed by a plurality of warp bars (22) and a plurality of weft bars (23) that are interlocked with each other, each of the warp bars (22) and weft bars (23) is formed with a plurality of inlays (24), and the bottoms of both ends of the warp bars (22) and weft bars (23) are formed with pressing holes (25) for pressing the rectangular sealing ring (21) downwards.

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