High-precision mold frame plate positioning and milling device and machining process

Abstract

The invention relates to the technical field of formwork plate machining, and discloses a high-precision formwork plate positioning and milling device and a machining technology.The high-precision formwork plate positioning and milling device comprises a workbench, a support is fixedly connected to the upper surface of the workbench, and a milling assembly used for milling a workpiece is arranged on the support through a movable platform; a bearing assembly used for positioning and installing a workpiece is installed on the workbench in a sliding mode, a transverse moving assembly capable of enabling the bearing assembly to transversely move along the workbench is arranged on the upper surface of the workbench, and a fixing frame is fixedly connected to the workbench. Precise positioning and repeated clamping of the workpiece in multiple directions and hole sites are achieved, positioning errors are fundamentally eliminated, the machining precision is remarkably improved, multi-frequency and automatic cleaning can be conducted on the surface and the bearing face of the workpiece at multiple key nodes, machining chippings are thoroughly removed, and the machining efficiency is improved. And the damage of the chippings to the positioning deviation of the workpiece and the quality of the secondary machining surface is effectively avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of die set plate machining, in particular to a high-precision die set plate positioning milling device and machining process. BACKGROUND

[0002] As the framework of the mold, the die set is the core and basic component of various precision molds such as injection molds and die casting molds, which is usually composed of multiple large steel plates. These plates are collectively referred to as die set plates. The overall precision of the die set directly determines the forming precision, service life and reliability of the final mold. Therefore, high requirements are placed on the flatness, parallelism, thickness size and hole position accuracy of the die set plate. In the traditional machining process of the die set plate, double-sided milling is a crucial process.

[0003] Through retrieval, the patent with the publication number CN208788131U discloses a boring and milling device for mechanical manufacturing. The device discharges the purified air after purification by an air purifier, preventing harmful gases generated during processing from diffusing and polluting the environment, and avoiding harm to the processing personnel. However, there are still several problems: 1. Due to the thickness of the die set plate, the depth of the cavity to be machined is deep. Milling needs to be performed from both sides. However, the position before and after the workpiece is flipped is difficult to determine accurately. Therefore, how to eliminate positioning errors and improve machining precision is a problem that needs to be solved.

[0004] 2. The debris generated during processing will fall onto the workbench. If the debris falling on the workbench is not treated, the debris will affect the accurate positioning of the workpiece after blanking after flipping, leading to a decrease in subsequent milling precision and affecting the final quality of the die set plate. SUMMARY

[0005] To overcome the shortcomings of the prior art, the present application provides a high-precision die set plate positioning milling device and machining process, which mainly solves the problems of the thickness of the die set plate, the depth of the cavity to be machined, the need for milling from both sides during milling, the difficulty in accurately determining the position before and after the workpiece is flipped, and the debris generated during processing falling onto the workbench. If the debris falling on the workbench is not treated, the debris will affect the accurate positioning of the workpiece after blanking after flipping, leading to a decrease in subsequent milling precision and affecting the final quality of the die set plate.

[0006] To achieve the above-mentioned purposes, the present application provides the following technical solutions: The utility model provides a high-precision mould frame plate positioning milling processing device, including the workbench, the upper surface of workbench is fixedly connected with the support, the milling assembly for milling processing to work piece is arranged on the support through the moving platform, the workbench is slidably equipped with the bearing assembly for the positioning installation of work piece, the upper surface of workbench is equipped with the transverse movement component that can make bearing assembly move along the transverse direction of workbench, the workbench is fixedly connected with the fixed frame, the fixed frame is equipped with the lifting and overturning assembly for the clamping and overturning of work piece, the fixed frame is equipped with the sweep and blow component for cleaning the surface of work piece and the surface of bearing assembly before and after processing below the lifting and overturning assembly.

[0007] Further, the bearing assembly includes a bearing table slidably connected to the upper surface of the workbench, a plurality of top seats for clamping the four sides of the workpiece are slidably connected in the T-shaped groove on the bearing table, and a limiting assembly for limiting the workpiece is arranged on two of the top seats. Four positioning columns for cooperating with the four holes on the workpiece are slidably connected in the T-shaped groove on the bearing table.

[0008] On the basis of the foregoing scheme, the limiting assembly includes two through holes formed in the top seat, a round rod is slidably connected in each of the two through holes, a limiting block is fixedly connected to one end of the round rod, the shape of the limiting block matches the shape of the grooves on the two sides of the workpiece, a threaded hole is formed between the two through holes on the top seat, a screw is threadedly connected in the threaded hole, and one end of the screw abuts against one side of the limiting block.

[0009] As a further scheme of the utility model, the lifting and overturning assembly includes two U-shaped plates fixedly connected to the two sides of the fixed frame, a U-shaped slide is slidably connected through the two U-shaped plates, a second air cylinder is fixedly connected between the top inner wall of the U-shaped slide and the top outer wall of the fixed frame, a third air cylinder is fixedly connected to each end of the U-shaped slide, a connecting plate is fixedly connected to the output end of the third air cylinder through the side wall of the U-shaped slide, a rotary air cylinder is fixedly connected to one side of the connecting plate, a connecting frame is fixedly connected to the outer side of the rotary air cylinder, and a customized clamp is fixedly connected to each end of the connecting frame. The inner wall of the clamp jaw of the customized clamp matches the protruding corner parts on the two sides of the workpiece.

[0010] Further, two pin holes are formed in one side of the connecting frame, two notches are formed in the connecting plate, and an electromagnetic pin that cooperates with the pin holes is fixedly connected in each of the notches.

[0011] On the basis of the foregoing scheme, the sweeping and blowing assembly comprises a plurality of slide sleeves I slidingly connected to the plurality of legs of the fixing frame respectively, one side of each of the two slide sleeves I on the same side is fixedly connected with a guide rail, a sliding table is slidingly connected between the two guide rails, a gas pipe is fixedly installed on the upper surface of the sliding table through a fixing seat, the gas pipe nozzle is obliquely downwardly arranged, a brush is bonded to the lower surface of the sliding table, the plurality of legs of the fixing frame are fixedly connected with two back-to-back type limiting rings above and below the slide sleeve I respectively, and the distance between the two back-to-back type limiting rings is the height of the two slide sleeves I.

[0012] As a further scheme of the present application, the two legs on one side of the fixing frame and above the two slide sleeves I are slidingly connected with two slide sleeves II, one side of each of the two slide sleeves II is fixedly connected with an L-shaped plate, a ball screw module is fixedly connected to the top inner wall of the L-shaped plate, and a connecting block is fixedly connected between the ball screw module and the sliding table.

[0013] Further, the two slide sleeves I on one guide rail are fixedly connected with a horizontal plate, the two legs on one side of the fixing frame are fixedly connected with a support plate, and the support plate is fixedly connected with a fourth air cylinder between the horizontal plate.

[0014] On the basis of the foregoing scheme, the moving platform comprises a first air cylinder fixedly connected to the top outer wall of the support, the piston rod end of the first air cylinder is fixedly connected with a double-shaft moving module sliding along the support, and the horizontal moving assembly comprises two end blocks fixedly connected to the upper surface of the workbench, a screw rod is rotatably connected between the two end blocks through a bearing seat, the screw rod is threadedly connected with a threaded sleeve penetrating through the bottom of the bearing table, one side of one of the end blocks is fixedly connected with a driving motor for rotating the screw rod along the axial direction, an optical switch sensor is fixedly connected to one side of the workbench and located below the fixing frame at the middle position, an L-shaped stop rod is fixedly connected to one side of the bearing table and used in cooperation with the optical switch sensor, and the optical switch sensor is electrically connected with the driving motor.

[0015] A high-precision mold frame plate positioning and milling process comprises the following steps: S1: first, a semi-finished mold frame plate blank is positioned on a bearing assembly for accurate positioning, the workpiece is clamped on the bearing assembly, then a horizontal moving assembly is started to move the bearing assembly with the clamped workpiece to a starting position below a milling assembly, the milling assembly drives the workpiece to move according to a preset processing path in cooperation with a moving platform, one side of the plate is completely milled, after the milling is completed, the milling assembly is lifted, and the horizontal moving assembly moves the bearing assembly out of the processing area; S2: when the bearing assembly moves to the lifting and overturning assembly, pause the movement, start the sweep and blow assembly, the brush extends and sweeps across the processed one side, and the high-pressure jet nozzle blows air flow to remove most of the processed debris attached to the one side; S3: the lifting and overturning assembly is lowered, the clamping mechanism accurately grabs the workpiece processed on one side, and after clamping the workpiece, the lifting and overturning assembly vertically rises to lift the workpiece to a safe height. After lifting into position, the actuator of the lifting and overturning assembly drives the clamping mechanism to rotate 180 degrees, so that the other side of the workpiece faces upward. At this time, the sweep and blow assembly is started again to remove the debris falling on the bearing assembly, preparing for the subsequent overturning and falling back, and ensuring that the bearing surface of the workpiece is absolutely clean before overturning and falling back. S4: then the lifting and overturning assembly carries the workpiece down, and the workpiece is accurately placed on the cleaned bearing assembly. The clamping device of the bearing assembly acts again to clamp the overturned workpiece, and the sweep and blow assembly is started for the third time to clean the other side of the workpiece, ensuring the cleanliness of the workpiece processing surface.

[0016] Compared with the prior art, the present application provides a high-precision mold frame plate positioning and milling processing device and processing technology, which has the following beneficial effects: 1. The present application adopts a composite positioning system composed of a positioning column and a limiting assembly with a limiting block, which realizes accurate positioning and repeated clamping of the workpiece in multiple directions and hole positions, fundamentally eliminates positioning errors, and significantly improves processing accuracy.

[0017] 2. The sweep and blow assembly provided in the present application automatically cleans the workpiece surface and the bearing surface at multiple key nodes before processing, before overturning, before falling back after overturning, and before secondary processing after overturning, completely removes processing debris, and effectively avoids damage to the workpiece positioning deviation and the quality of the secondary processing surface caused by debris.

[0018] 3. The lifting and overturning assembly of the present application uses a customized clamp to match the workpiece corner to firmly grasp, and cooperates with the electromagnetic pin mechanical locking mechanism to effectively prevent the workpiece from loosening and falling due to accidental power failure or gas leakage during overturning and transfer, ensuring the safety of the equipment and the workpiece.

[0019] 4. The integrated lifting and overturning assembly and the horizontal moving assembly of the present application realize automatic conveying, overturning and secondary clamping of the workpiece, integrate the double-sided processing process into one-stop automatic operation, greatly reduce the manual lifting, positioning and turning time required in traditional processing, and significantly improve the production efficiency.

[0020] 5、The present application integrates the milling, positioning, transverse movement, overturning, cleaning and other functional modules on a workbench, has reasonable layout, compact structure, and relatively independent functional modules, facilitating individual debugging, maintenance or replacement, and reducing maintenance cost.

[0021] 6、The whole processing flow of the present application realizes automatic operation basically from the feeding positioning to the double-sided processing completion and then to the discharging, and the operator only needs to complete feeding and discharging and starting operation, greatly reduces labor intensity, and reduces the dependence on operator proficiency. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A front side three-dimensional structure schematic view of a high-precision die frame plate positioning and milling processing device is provided for the present application. Figure 2 A rear side three-dimensional structure schematic view of a high-precision die frame plate positioning and milling processing device is provided for the present application. Figure 3 A high-precision die frame plate positioning and milling processing device is provided for the present application. Figure 1 A partial enlarged structure schematic view of the high-precision die frame plate positioning and milling processing device. Figure 4 A bearing table enlarged structure schematic view of a high-precision die frame plate positioning and milling processing device is provided for the present application. Figure 5 A top seat enlarged structure schematic view of a high-precision die frame plate positioning and milling processing device is provided for the present application. Figure 6 A fixed frame enlarged structure schematic view of a high-precision die frame plate positioning and milling processing device is provided for the present application. Figure 7 A lifting and overturning assembly structure schematic view of a high-precision die frame plate positioning and milling processing device is provided for the present application. Figure 8 A high-precision die frame plate positioning and milling processing device Figure 7 A partial exploded structure schematic view of the high-precision die frame plate positioning and milling processing device. Figure 9 A sweeping and blowing assembly enlarged structure schematic view of a high-precision die frame plate positioning and milling processing device is provided for the present application.

[0023] In the figure: 1, workbench; 2, support; 3, moving platform; 301, cylinder one; 302, double-shaft moving module; 4, milling assembly; 5, transverse moving assembly; 501, end block; 502, screw rod; 503, driving motor; 6, bearing assembly; 601, bearing table; 602, positioning column; 603, top seat; 604, limiting assembly; 6041, through hole; 6042, round rod; 6043, limiting block; 6044, screw; 7, fixing frame; 8, lifting and overturning assembly; 801, U-shaped plate; 802, U-shaped slide; 803, cylinder two; 804, cylinder three; 805, connecting plate; 806, rotary cylinder; 807, connecting frame; 808, customized clamp; 809, notch; 810, electromagnetic pin; 811, pin hole; 9, sweeping and blowing assembly; 901, sliding sleeve one; 902, guide rail; 903, sliding table; 904, air pipe; 905, brush; 906, sliding sleeve two; 907, support plate; 908, cylinder four; 909, cross plate; 910, L-shaped plate; 911, ball screw module; 912, connecting block; 913, H-shaped limiting ring. DETAILED DESCRIPTION

[0024] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the embodiments and in conjunction with the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0025] The serial numbers of components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and have no any sequence or technical meaning. And the "connection" and "coupling" of the present application, if not specially stated, include direct and indirect connection (coupling). In the description of the present application, it should be understood that the orientation or position relationship indicated by the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.

[0026] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "on", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "under", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0027] Please refer to Figures 1-9 As shown in the figure, a high-precision mold frame plate positioning milling device, including a workbench 1, the upper surface of the workbench 1 is fixedly connected with a support 2 through bolts, the support 2 is provided with a milling assembly 4 for milling workpiece through a moving platform 3, the workbench 1 is slidably provided with a bearing assembly 6 for positioning and installing the workpiece, the upper surface of the workbench 1 is provided with a transverse moving assembly 5 which can move the bearing assembly 6 along the workbench 1, the workbench 1 is fixedly connected with a fixing frame 7 through bolts, the fixing frame 7 is provided with a lifting and overturning assembly 8 for clamping and overturning the workpiece, and the fixing frame 7 is provided with a sweeping and blowing assembly 9 below the lifting and overturning assembly 8 for cleaning the surface of the workpiece before and after processing and the surface of the bearing assembly 6.

[0028] The mold frame is the skeleton of the mold, which is the core and basic component of various precision molds such as injection mold and die casting mold. It is usually composed of multiple large steel plates. These plates are collectively referred to as mold frame plates. The overall precision of the mold frame directly determines the forming precision, service life and reliability of the final mold. Therefore, high requirements are put forward for the flatness, parallelism, thickness size and hole position precision of the mold frame plate. In the traditional processing technology of mold frame plate, double-sided milling is a crucial process.

[0029] Firstly, the semi-finished mold frame plate blank is placed on the bearing assembly 6 for accurate positioning, and the workpiece is clamped firmly on the bearing assembly 6. Then the transverse moving assembly 5 is started, and the bearing assembly 6 with the clamped workpiece is moved to the starting position of the milling assembly 4 below. The milling assembly 4 drives the workpiece to move according to the preset processing path through the linkage with the moving platform 3, and completes the entire milling process of one side of the plate. After processing is completed, the milling assembly 4 lifts the cutter, and the transverse moving assembly 5 moves the bearing assembly 6 out of the processing area. When the bearing assembly 6 moves to the position below the lifting and overturning assembly 8, the movement is paused, and the sweeping and blowing assembly 9 is started. The sweeping brush extends and sweeps across the processed side, and the high-pressure air nozzle blows air to remove most of the processing debris attached to the side. The lifting and overturning assembly 8 is lowered, the clamping mechanism accurately grabs the workpiece which has been processed on one side, and after clamping the workpiece, the lifting and overturning assembly 8 is vertically lifted to lift the workpiece to a safe height; after the workpiece is lifted to the position, the actuator of the lifting and overturning assembly 8 drives the clamping mechanism to rotate by 180 degrees, so that the other side of the workpiece faces upward; at this time, the sweeping and blowing assembly 9 is started again to clean the debris falling on the bearing assembly 6, so as to prepare for the subsequent overturning and falling, and ensure that the bearing surface of the workpiece is absolutely clean before overturning and falling. Then the lifting and overturning assembly 8 carries the workpiece to be lowered, and the workpiece is accurately placed on the cleaned bearing assembly 6; the clamping device of the bearing assembly 6 is actuated again to clamp the overturned workpiece, and the sweeping and blowing assembly 9 is started for the third time to clean the other side of the workpiece, so as to ensure the cleanliness of the workpiece processing surface.

[0030] In order to solve the technical problem of positioning and installing the semi-finished workpiece, the bearing assembly 6 comprises a bearing table 601 slidably connected to the upper surface of the workbench 1, a plurality of top seats 603 for clamping four sides of the workpiece are slidably arranged in the T-shaped groove on the bearing table 601, two of the top seats 603 are provided with a limiting assembly 604 for limiting the workpiece, and four positioning columns 602 matched with four holes on the workpiece are slidably arranged in the T-shaped groove on the bearing table 601.

[0031] Further, the limiting assembly 604 comprises two through holes 6041 formed in the top seat 603, a round rod 6042 is slidably connected in each of the two through holes 6041, one end of the round rod 6042 is fixedly connected with a limiting block 6043, the limiting block 6043 is matched with the shape of the groove on the two sides of the workpiece, a threaded hole is formed between the two through holes 6041 on the top seat 603, a screw 6044 is threadedly connected in the threaded hole, and one end of the screw 6044 abuts against one side of the limiting block 6043.

[0032] The composite positioning system composed of the positioning column 602 and the limiting assembly 604 with the limiting block 6043 realizes accurate positioning and repeated clamping of the workpiece in multiple directions and hole positions, fundamentally eliminates positioning errors, and significantly improves machining accuracy.

[0033] Specifically, the operator places the semi-finished product mold frame plate on the bearing table 601 of the bearing assembly 6, and the four holes on the semi-finished product mold frame plate are inserted into the four positioning columns 602 on the bearing table 601 for accurate positioning, then the four side top seats 603 are pushed close to the multiple sides of the workpiece, then the limiting assembly 604 is adjusted so that the limiting blocks 6043 are embedded in the specific grooves on the sides of the workpiece, accurate limiting in the circumferential direction is realized, the workpiece is ensured to be not moved, and finally the bolts on the top seats 603 are tightened to firmly mount the workpiece on the bearing table 601, the uniqueness of the workpiece on the machining reference and the repeat positioning accuracy are ensured.

[0034] In order to solve the technical problem of accurate overturning of the semi-finished workpiece, the lifting and overturning assembly 8 is adopted, which comprises two U-shaped plates 801 fixedly connected on the two sides of the fixed frame 7 through bolts, two U-shaped slides 802 slidably connected on the two U-shaped plates 801, a cylinder two 803 fixedly connected between the top inner wall of the U-shaped slide 802 and the top outer wall of the fixed frame 7 through a bolt, a cylinder three 804 fixedly connected to the two end portions of the U-shaped slide 802 through a bolt, a connecting plate 805 fixedly connected to the output end of the cylinder three 804 through a bolt and penetrating through the side wall of the U-shaped slide 802, a rotary cylinder 806 fixedly connected to one side of the connecting plate 805 through a bolt, a connecting frame 807 fixedly connected to the outer side of the rotary cylinder 806 through a bolt, and a customized clamp 808 fixedly connected to the two end portions of the connecting frame 807 through a bolt, wherein the inner wall of the clamping jaw of the customized clamp 808 is matched with the protruding corner portions on the two sides of the workpiece.

[0035] It should be noted that the rotary cylinder 806 is an angular swing actuator that converts the pressure energy of compressed air into mechanical energy, and through the control of the alternating entry of gas into the two side cavities, the output shaft is driven to rotate accurately, and through the cooperation with an adjustable block, a magnetic switch or an angle sensor, the rotation angle and the termination position can be accurately controlled, and the rotation angle, torque and buffer can be selected and set according to the actual working condition by the person skilled in the art, which will not be described here.

[0036] It should be noted that the cylinder two 803 and the cylinder three 804 are power actuators that convert the pressure energy of compressed air into mechanical energy, and through the control of the entry and exit of gas, the piston is driven to move linearly, and through the cooperation with a magnetic switch, a proximity switch or a photoelectric switch, the extension and retraction displacement of the cylinder piston rod can be accurately controlled, and the actual demand can be set by the person skilled in the art, which will not be described here.

[0037] Specifically, the workpiece is grabbed and turned over, and the workpiece is placed on the plurality of top seats 603 and the limiting assembly 604 on the bearing table 601, so that the workpiece is in a movable state, then the cylinder two 803 of the lifting and turning assembly 8 is actuated to push the U-shaped carriage 802 to descend along the U-shaped plate 801, so that the customized clamp 808 reaches the protruding corner parts on both sides of the workpiece, then the cylinder three 804 pushes the connecting plate 805 and the rotary cylinder 806 to advance, so that the customized clamp 808 is accurately clamped into the corners of the side edges of the workpiece.

[0038] After the workpiece is clamped firmly, the cylinder two 803 is actuated in reverse to vertically lift the workpiece to a safe height, and the rotary cylinder 806 is actuated to accurately rotate 180 degrees to make the unprocessed surface of the workpiece face upward.

[0039] Further, one side of the connecting frame 807 is provided with two pin holes 811, and the connecting plate 805 is provided with two notches 809, and the two notches 809 are both fixedly connected with electromagnetic pins 810 (model: PADA5442 cylindrical head electromagnetic lock) matched with the pin holes 811 through bolts.

[0040] The lifting and turning assembly 8 adopts the customized clamp 808 to match the workpiece corner to firmly grab, and cooperates with the electromagnetic pin 810 mechanical locking mechanism to effectively prevent the workpiece from loosening and falling due to accidental power failure or gas leakage during turning and transferring, and ensures the safety of the equipment and the workpiece.

[0041] The integrated lifting and turning assembly 8 and the horizontal moving assembly 5 realize automatic conveying, turning and secondary clamping of the workpiece, integrate the double-sided machining process into one-stop automatic operation, greatly reduces the manual lifting, positioning and turning time in traditional machining, and the production efficiency is greatly improved.

[0042] Before or after turning, the electromagnetic pin 810 can be inserted into the pin hole 811 of the connecting frame 807 to mechanically lock the turning mechanism, prevent the workpiece from falling due to accidental power failure or gas loss during transfer, and greatly improve the safety.

[0043] In order to solve the technical problem of cleaning the residual debris on the workpiece and the surface of the bearing assembly 6, the sweeping and blowing assembly 9 is adopted, which comprises a plurality of slide sleeves one 901 slidably connected to a plurality of supporting legs of the fixed frame 7, and a guide rail 902 is fixedly connected to one side of the two slide sleeves one 901 on the same side, a sliding table 903 is slidably connected between the two guide rails 902, a gas pipe 904 is fixedly installed on the upper surface of the sliding table 903 through a fixed seat, the gas nozzle of the gas pipe 904 is inclined downward, and a brush 905 is bonded to the lower surface of the sliding table 903.

[0044] The plurality of legs of the fixing frame 7 are fixedly connected with a back-shaped limiting ring 913 above and below the slide sleeve one 901, and the distance between the two back-shaped limiting rings 913 is the height of the two slide sleeve ones 901.

[0045] The third cleaning operation is to clean the second unprocessed surface again by the sweeping and blowing assembly 9 after the clamping operation is completed, so as to ensure the cleanliness of the unprocessed surface and the accuracy of subsequent processing, and the second milling operation can be performed after the cleaning is completed.

[0046] Further, the two legs on one side of the fixing frame 7 and above the two slide sleeve ones 901 are slidingly connected with a slide sleeve two 906, one side of the two slide sleeve twos 906 is fixedly connected with an L-shaped plate 910, the top inner wall of the L-shaped plate 910 is fixedly connected with a ball screw module 911 through a bolt, and the connecting block 912 is fixedly connected between the mover of the ball screw module 911 and the sliding table 903 through a bolt.

[0047] The sweeping and blowing cleaning is performed, the ball screw module 911 drives the sliding table 903, the brush 905 and the air pipe 904 thereon to move along the guide rail 902, the brush 905 sweeps away the larger debris, and the high-pressure airflow completely blows away the fine dust and debris, so as to provide a clean surface for the turning and grabbing, and the sliding table 903 moves back and forth along the guide rail 902.

[0048] Further, the two slide sleeve ones 901 on one of the guide rails 902 are fixedly connected with a horizontal plate 909 through a bolt, the two legs on one side of the fixing frame 7 are fixedly connected with a support plate 907 through a bolt, and the support plate 907 and the horizontal plate 909 are fixedly connected with a cylinder four 908 through a bolt.

[0049] It should be noted that the cylinder four 908 is a power execution element that can convert the pressure energy of compressed air into mechanical energy, drives the piston to move linearly, and can realize precise control of the extension and retraction displacement of the cylinder piston rod by cooperating with a magnetic switch, a proximity switch or a photoelectric switch. Those skilled in the art can set it according to actual needs, which will not be described here.

[0050] After the workpiece is turned over, the debris inside the workpiece will fall onto the bearing table 601, and the surface of the bearing table 601 needs to be cleaned. First, the cylinder four 908 is started to shrink, and then the slide sleeve one 901 and the slide sleeve two 906 are driven to move downward along the legs of the fixing frame 7, so that the sliding table 903 moves downward and the brush 905 and the air pipe 904 move downward by a short distance, so that the brush 905 can sweep the surface of the bearing table 601. The sweeping and blowing assembly 9 is started again to clean the surface of the bearing table 601 which has been completely exposed below for the second time, so as to ensure that no debris is pressed back by the workpiece and the flatness of the second surface processing.

[0051] Through the sweep blowing assembly 9, the workpiece surface and the bearing surface are cleaned multiple times and automatically before turning over, before falling back during turning over, and before secondary processing after turning over, so that the machining debris is completely removed, and the damage of the debris to the workpiece positioning deviation and the secondary processing surface quality is effectively avoided.

[0052] The moving platform 3 comprises a first air cylinder 301 fixedly connected to the top outer wall of the support 2, and a double-shaft moving module 302 sliding along the support 2 is fixedly connected to the end of the piston rod of the first air cylinder 301 through bolts.

[0053] It should be noted that the first air cylinder 301 is a power execution element that converts the pressure energy of compressed air into mechanical energy, and drives the piston to perform linear reciprocating motion by controlling the gas in and out. The precise control of the extension and retraction displacement of the piston rod of the air cylinder can be achieved by cooperating with a magnetic switch, a proximity switch or a photoelectric switch. Those skilled in the art can set it according to actual needs, which will not be described here.

[0054] Further, the horizontal moving assembly 5 comprises two end blocks 501 fixedly connected to the upper surface of the workbench 1 by bolts, a lead screw 502 rotatably connected between the two end blocks 501 through a bearing block, and a threaded sleeve at the bottom of the bearing table 601 is threadedly connected with the lead screw 502. One side of one of the end blocks 501 is fixedly connected with a driving motor 503 for rotating the lead screw 502 along the axial direction.

[0055] In this application, an annular groove is axially arranged on the inner wall of the threaded cylinder on the bearing table 601, and a nylon 66 damping ring with a Shore hardness of 85A is embedded in the groove. The continuous axial compression force generated by the elastic deformation of the nylon 66 damping ring forms a helix angle interference fit of 15°-20° with the surface of the lead screw 502. When the threaded pair bears axial vibration load, the nylon insert can produce an elastic compression of 0.3mm, so that the friction coefficient between the threaded contact surfaces is increased from 0.15 to 0.68 (according to ASTM D1894 standard test), effectively inhibiting the loosening displacement caused by the rebound of the thread.

[0056] It should be noted that the driving motor 503 is a servo motor with an encoder, the number of rotations and the rotation angle of the motor output shaft are controllable, and the precision is high. Those skilled in the art can set it according to actual needs, which will not be described here.

[0057] When the milling operation is performed, the driving motor 503 is started to rotate the screw rod 502, and since the screw rod 502 is engaged with the threaded sleeve at the bottom of the bearing table 601, the entire bearing assembly 6 and the workpiece are driven to move along the X-axis of the workbench 1 accurately, enter the machining area of the milling assembly 4, and the moving platform 3 works, and the double-axis moving module 302 drives the milling assembly 4 to move along the Y-axis and the Z-axis, and the milling spindle mills the A surface of the workpiece at a high speed along the preset path, and in this process, the transverse moving assembly 5 can cooperate to accurately feed along the X-axis.

[0058] Further, the photoelectric switch sensor (the photoelectric switch sensor is of the E3S-GS15N induction switch type) is fixedly connected to the workbench 1 on one side and at the middle position below the fixed frame 7, the L-shaped stop lever used in cooperation with the photoelectric switch sensor is fixedly connected to the bearing table 601 on one side, and the photoelectric switch sensor is electrically connected with the driving motor 503.

[0059] Specifically, after processing, cleaning and preparation for overturning, after the first surface is processed, the transverse moving assembly 5 drives the bearing table 601 to move, so that it is separated from the machining area and moves to the position directly below the lifting overturning assembly 8, and when the L-shaped stop lever on the side of the bearing table 601 triggers the photoelectric switch sensor on the workbench 1, the transverse moving assembly 5 stops and the position is accurately positioned.

[0060] The milling, positioning, transverse moving, overturning and cleaning function modules are integrated on the workbench 1, the layout is reasonable, the structure is compact, the function modules are relatively independent, and the function modules are convenient for separate debugging, maintenance or replacement, and the maintenance cost is reduced.

[0061] The entire processing flow, from positioning of feeding to completion of double-sided processing and then to discharging, basically realizes automatic operation, and the operator only needs to complete feeding and discharging and start operation, so that the labor intensity is greatly reduced, and the dependence on the skill level of the operator is reduced.

[0062] The detailed working principle of the application is divided into the following steps: S1: First, the operator places the semi-finished product mold frame plate on the bearing table 601 of the bearing assembly 6, and the four holes on the semi-finished product mold frame plate are inserted into the four positioning columns 602 on the bearing table 601 for accurate positioning, then the four side top seats 603 are pushed close to the multiple sides of the workpiece, then the limiting assembly 604 is adjusted so that the limiting block 6043 is embedded in the specific groove on the side of the workpiece to realize accurate limiting in the circumferential direction, ensure that the workpiece does not move, and finally the bolts on the top seats 603 are tightened to firmly install the workpiece on the bearing table 601, so that the uniqueness of the workpiece on the machining reference and the repeat positioning accuracy are ensured. S2: Then the first face of the workpiece is milled, the process is to start the drive motor 503 to drive the screw rod 502 to rotate, because the screw rod 502 is engaged with the threaded sleeve at the bottom of the bearing table 601, thereby driving the entire bearing assembly 6 and the workpiece to move accurately along the X axis of the workbench 1 into the machining area of the milling assembly 4, the moving platform 3 works, the double-axis moving module 302 drives the milling assembly 4 to move along the Y axis and the Z axis, and the milling spindle mills the A face of the workpiece at high speed according to the preset path. In this process, the cross-moving assembly 5 can cooperate to accurately feed the X axis; S3: After processing, clean and prepare to flip, after the first face is processed, the cross-moving assembly 5 drives the bearing table 601 to move, so that it is away from the processing area and moves to the position directly below the lifting and flipping assembly 8. When the L-shaped stop bar on the side of the bearing table 601 triggers the photoelectric switch sensor on the workbench 1, the cross-moving assembly 5 stops and the position is accurately positioned; S4: First sweeping and blowing cleaning, start the ball screw module 911 to drive the sliding table 903 and the brush 905 and the air pipe 904 on it to move along the guide rail 902, sweep over the first face of the workpiece that has been processed, the brush 905 sweeps away the larger debris, and the high-pressure airflow completely blows away the fine dust and debris, providing a clean surface for flipping and grabbing. The sliding table 903 moves back and forth along the guide rail 902; S5: Workpiece grabbing and flipping, the multiple top seats 603 and the limiting assembly 604 on the bearing table 601 make the workpiece in a movable state, then the cylinder two 803 of the lifting and flipping assembly 8 drives the U-shaped carriage 802 to descend along the U-shaped plate 801, so that the customized clamp 808 reaches the protruding corner parts on both sides of the workpiece, then the cylinder three 804 drives the connecting plate 805 and the rotating cylinder 806 to advance, so that the customized clamp 808 accurately clamps into the corners of the side of the workpiece, firmly clamping the workpiece; S6: After the workpiece is clamped firmly, the cylinder two 803 is started in reverse motion, the workpiece is lifted vertically to a safe height, the rotating cylinder 806 is started to rotate accurately by 180 degrees to make the unprocessed face of the workpiece face upward. Before or after flipping, the electromagnetic pin 810 can be inserted into the pin hole 811 of the connecting frame 807, mechanically locking the flipping mechanism to prevent the workpiece from falling due to accidental power failure or gas loss during transfer, greatly improving safety; S7: After the workpiece is flipped, the debris inside will fall onto the bearing table 601, which needs to be cleaned. First, start the cylinder four 908 to retract, thereby driving the sliding sleeve one 901 and the sliding sleeve two 906 to move downward along the legs of the fixed frame 7, so that the sliding table 903 moves downward and the brush 905 and the air pipe 904 move downward by a short distance, ensuring that the brush 905 can sweep over the surface of the bearing table 601. Start the sweeping and blowing assembly 9 again to clean the surface of the bearing table 601 below completely exposed for the second time, ensuring that no debris is pressed back by the workpiece, and the flatness of the second face processing; S8: back to the fall and re-chuck, after cleaning, the lifting and turning assembly 8 is lowered, the workpiece is accurately placed back on the clean bearing table 601, and the plurality of holes on the workpiece are accurately inserted into the four positioning columns 602 on the bearing table 601, the custom clamp 808 is loosened, the cylinder three 804 is retracted, the lifting and turning assembly 8 is raised and reset, and the clamping device of the bearing assembly 6 is actuated again to clamp the turned workpiece again; S9: third cleaning operation, after the clamping operation is completed, the second surface is cleaned again by the sweeping and blowing assembly 9 to ensure the cleanliness of the unprocessed surface, thereby increasing the accuracy of subsequent processing, and after the cleaning is completed, the second milling operation can be performed.

[0063] The technical features of the above embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not contradict, they should be considered as within the scope of the present disclosure.

[0064] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the present application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the scope of the present application should be subject to the appended claims.

Claims

1. A high-precision die frame plate positioning and milling device, comprising a workbench (1), characterized in that, The upper surface of the workbench (1) is fixedly connected with a support (2), a milling assembly (4) for milling workpieces is arranged on the support (2) through a moving platform (3), the upper surface of the workbench (1) is slidably connected with a bearing assembly (6) for positioning and installing workpieces, the upper surface of the workbench (1) is provided with a transverse moving assembly (5) allowing the bearing assembly (6) to move transversely along the workbench (1), the workbench (1) is fixedly connected with a fixing frame (7), the fixing frame (7) is provided with a lifting and overturning assembly (8) for clamping and overturning workpieces, and a sweeping and blowing assembly (9) for cleaning the surfaces of workpieces before and after processing and the surface of the bearing assembly (6) is arranged on the fixing frame (7) and below the lifting and overturning assembly (8).

2. The high-precision die set plate positioning and milling device according to claim 1, characterized in that, The bearing assembly (6) comprises a bearing table (601) slidably connected to the upper surface of the workbench (1), a plurality of top seats (603) for clamping workpieces on four sides are slidably arranged in a T-shaped groove on the bearing table (601), and two of the top seats (603) are provided with a limiting assembly (604) for limiting workpieces.

3. The high-precision die set plate positioning and milling device according to claim 2, characterized in that, The limiting assembly (604) comprises two through holes (6041) formed in the top seat (603), a round rod (6042) is slidably connected in each of the two through holes (6041), one end of the round rod (6042) is fixedly connected with a limiting block (6043), the limiting block (6043) has an outer shape matched with that of a groove on the two sides of the workpiece, a threaded hole is formed in the top seat (603) between the two through holes (6041), and a screw (6044) is threadedly connected in the threaded hole and abuts against one side of the limiting block (6043).

4. The high-precision die set plate positioning and milling device according to claim 1, characterized in that, The lifting and overturning assembly (8) comprises U-shaped plates (801) fixedly connected to the two sides of the fixing frame (7), U-shaped carriages (802) are arranged on the two U-shaped plates (801) and slidably connected thereto, a second air cylinder (803) is fixedly connected between the top inner wall of the U-shaped carriage (802) and the top outer wall of the fixing frame (7), a third air cylinder (804) is fixedly connected to the two end portions of the U-shaped carriage (802), a connecting plate (805) is fixedly connected to the output end of the third air cylinder (804) and penetrates through the side wall of the U-shaped carriage (802), a rotary air cylinder (806) is fixedly connected to one side of the connecting plate (805), a connecting frame (807) is fixedly connected to the outer side of the rotary air cylinder (806), and custom clamps (808) are fixedly connected to the two end portions of the connecting frame (807), and the inner walls of the clamping jaws of the custom clamps (808) are matched with the protruding corner portions on the two sides of the workpiece.

5. The high-precision die set plate positioning and milling device according to claim 4, characterized in that, Two pin holes (811) are formed in one side of the connecting frame (807), two notches (809) are formed in the connecting plate (805), and an electromagnetic pin (810) matched with the pin holes (811) is fixedly connected in each of the two notches (809).

6. The high-precision die set plate positioning and milling device according to claim 1, characterized in that, The sweep-blow assembly (9) includes a plurality of slide sleeves I (901) which are slidingly connected to the plurality of legs of the fixed frame (7) respectively, one side of the two slide sleeves I (901) on the same side is fixedly connected with a guide rail (902), the two guide rails (902) are slidingly connected with a sliding table (903), the upper surface of the sliding table (903) is fixedly installed with an air pipe (904) through a fixed seat, the air jet nozzle of the air pipe (904) is obliquely downward arranged, the lower surface of the sliding table (903) is fixedly connected with a brush (905) through bonding, the plurality of legs of the fixed frame (7) and the positions above and below the slide sleeve I (901) are fixedly connected with a back-to-back type limiting ring (913), and the distance between the two back-to-back type limiting rings (913) is the height of the two slide sleeves I (901).

7. The high-precision die set plate positioning and milling device according to claim 6, characterized in that, The two legs on one side of the fixed frame (7) and above the two slide sleeves I (901) are slidingly connected with a slide sleeve II (906), one side of the two slide sleeves II (906) is fixedly connected with an L-shaped plate (910), the top inner wall of the L-shaped plate (910) is fixedly connected with a ball screw module (911), and the mover of the ball screw module (911) is fixedly connected with a connecting block (912) between the sliding table (903).

8. The high-precision die set plate positioning and milling device according to claim 6, characterized in that, The two slide sleeves I (901) on one of the guide rails (902) are fixedly connected with a horizontal plate (909), the two legs on one side of the fixed frame (7) are fixedly connected with a supporting plate (907), and the supporting plate (907) and the horizontal plate (909) are fixedly connected with a cylinder four (908).

9. The high-precision die set plate positioning and milling device according to claim 1, characterized in that, The moving platform (3) includes a cylinder one (301) fixedly connected to the top outer wall of the support (2), the piston rod end of the cylinder one (301) is fixedly connected with a double-shaft moving module (302) sliding along the support (2) penetrating through the support (2), the transverse moving assembly (5) includes two end blocks (501) fixedly connected to the upper surface of the workbench (1), the two end blocks (501) are rotatably connected with a lead screw (502) through a bearing seat, the lead screw (502) is threadedly connected with a threaded sleeve penetrating through the bottom of the bearing table (601), one side of one of the end blocks (501) is fixedly connected with a driving motor (503) for rotating the lead screw (502) along the axial direction, one side of the workbench (1) and the middle position below the fixed frame (7) are fixedly connected with a photoelectric switch sensor, one side of the bearing table (601) is fixedly connected with an L-shaped stop rod used in cooperation with the photoelectric switch sensor, and the photoelectric switch sensor and the driving motor (503) are electrically connected.

10. A high-precision die set plate positioning milling process suitable for the high-precision die set plate positioning milling device of claim 1, characterized in that, The method comprises the following steps: S1: First, the semi-finished mold frame plate blank is placed on the bearing assembly (6) for accurate positioning, and the workpiece is clamped firmly on the bearing assembly (6), then the horizontal moving assembly (5) is started, the bearing assembly (6) with the clamped workpiece is moved to the machining starting position below the milling assembly (4), the milling assembly (4) drives the workpiece to move according to the preset machining path in linkage with the moving platform (3), completes the entire milling of one side of the plate, after the machining is completed, the milling assembly (4) lifts the tool, and the horizontal moving assembly (5) moves the bearing assembly (6) out of the machining area; S2: When the bearing assembly (6) moves to below the lifting and overturning assembly (8), stop moving, start the sweeping and blowing assembly (9), its sweeping brush extends and sweeps across the machined side, while the high-pressure air nozzle blows air flow to remove most of the machining debris attached to the side; S3: The lifting and overturning assembly (8) is lowered, its clamping mechanism accurately grabs the workpiece whose one side has been machined, after clamping the workpiece, the lifting and overturning assembly (8) is vertically raised to lift the workpiece to a safe height, after lifting into position, the actuator of the lifting and overturning assembly (8) drives the clamping mechanism to rotate 180 degrees, so that the other side of the workpiece faces upward, at this time, the sweeping and blowing assembly (9) is started again to remove the debris falling on the bearing assembly (6), in preparation for the subsequent overturning and falling back, to ensure that the bearing surface of the workpiece is absolutely clean before overturning and falling back; S4: Then the lifting and overturning assembly (8) carries the workpiece down, and the workpiece is accurately placed back on the cleaned bearing assembly (6), the clamping device of the bearing assembly (6) is actuated again to clamp the overturned workpiece, then the sweeping and blowing assembly (9) is started for the third time to clean the other side of the workpiece, to ensure the cleanliness of the workpiece machining surface.

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