Automatic step milling, feeding and discharging step grinding equipment and method

Abstract

The invention relates to the technical field of step grinding, in particular to automatic step milling feeding and discharging step grinding equipment and method.The automatic step milling feeding and discharging step grinding equipment comprises a workbench and a supporting frame installed on the rear side of the workbench, the front side face of the supporting frame is connected with a moving frame, and a grinding wheel mechanism, a protection plate and a milling cutter mechanism are sequentially installed on the front side face of the moving frame from top to bottom; the front side face of the movable frame is connected with a protection plate through a mounting assembly, a fixed abutting plate is fixed to the upper portion of the workbench, a feeding and discharging frame is connected to the right side of the workbench, a chain plate type conveying mechanism is connected with a fixed suction cup assembly through a supporting regulation and control assembly, and an electric telescopic rod is connected to the right side of the feeding and discharging frame. According to the automatic step milling, feeding, discharging and grinding equipment and method, a workpiece can be directly positioned and fixed through movement of one fixed suction cup assembly and cooperation of the fixed abutting plate, the workpiece does not need to be manually positioned and fixed, time and labor are saved, and the working efficiency of the step grinding equipment in the later period is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of milling steps, in particular to an automatic step milling feeding and discharging step milling equipment and method. BACKGROUND

[0002] In the process of screen printing, a squeegee strip is needed to remove excess paste. During the manufacturing process of the squeegee, the metal holder or the surface of the elastic rubber strip of the squeegee needs to be rough-milled to form a step shape, so as to form a plane of different heights, thereby improving the overall performance and assembly precision of the part. After the milling step processing, a step milling equipment is needed to perform finish machining on the surface. For example, the patent with the patent name "A centerless step grinding machine" disclosed in the prior art with the publication number "CN102975089B" discloses that in order to adapt to the grinding of slender shafts or slender tool handles, the slender shafts or slender tool handles can be fixed in advance during positioning. A limiting block is fixed on the front end side plate of the workbench through a bolt. A limiting hole is formed in one end of the limiting block, and a row position through hole is formed in the other end. The bolt passes through the row position through hole and is fixed on the front end side plate of the workbench. One end of the slender shaft or the slender tool handle that does not need to be ground is inserted into the limiting hole. A novel improvement is made on the basis of the original grinding machine for grinding cylindrical tool handles. The upper end surface of the rotating wheel, the right end surface of the semicircular head of the baffle, and the lower end surface of the hasp wheel perform outer cutting precise positioning on the cylindrical tool handle placed in the middle, ensuring the coaxiality and surface straightness of the tool handle after grinding, improving the processing efficiency, and reducing the cost investment of purchasing large-scale precision grinding machine equipment. The patent with the patent name "A multi-step grinding machine" disclosed in the prior art with the publication number "CN114700817A" discloses that the upper end of the second sliding block is fixedly installed with an X-axis adjusting mechanism. The upper end of the X-axis adjusting mechanism is provided with a Z-axis lifting platform. The upper end of the Z-axis lifting platform is fixedly installed with a clamp. The clamp includes a second mounting plate. The upper end of the second mounting plate is fixedly installed with a positioning seat. A through hole is horizontally formed in the upper end of the positioning seat. An installation slot and a clamping slot are longitudinally formed in the upper end of the positioning seat. The installation slot and the clamping slot are arranged in communication. A positioning pin is inserted into the through hole in the installation slot. A positioning pin fixed insert is installed at one end of the positioning pin. The positioning pin is installed on the positioning seat through the positioning pin fixed insert. An installation block is connected to the upper end of the installation slot. A workpiece pipe, such as a PVC pipe, is inserted into the through hole in the clamping slot. A pipe guide insert is installed in the through hole on one side of the positioning seat. The workpiece pipe is inserted into the pipe guide insert. The workpiece pipe is installed on the positioning seat through the pipe guide insert. The other end of the positioning pin clamps the workpiece pipe.

[0003] The step grinding device in the prior art is manually fed and discharged by workers or mechanically fed and discharged by a mechanical hand, and then workers manually operate a clamping mechanism to clamp a workpiece, so that the operation is complicated, the workpiece cannot be automatically fed, discharged and clamped, and the step grinding efficiency is low in the later period. SUMMARY

[0004] The present application aims to provide an automatic step milling, feeding and discharging step grinding device and method to solve the problem that the step grinding device on the market is manually fed and discharged by workers or mechanically fed and discharged by a mechanical hand, and then workers manually operate a clamping mechanism to clamp a workpiece, so that the operation is complicated, the workpiece cannot be automatically fed, discharged and clamped, and the step grinding efficiency is low in the later period.

[0005] To achieve the above object, the present application provides the following technical scheme: an automatic step milling, feeding and discharging step grinding device, comprising a workbench and a support frame installed on the back side thereof, and the front side of the support frame is connected with a moving frame, the front side of the moving frame is sequentially installed from top to bottom with a grinding wheel mechanism, a protective plate and a milling cutter mechanism, and the front side of the moving frame is connected with the protective plate through a mounting assembly, the upper side of the workbench is fixed with a fixed abutting plate, the right side of the workbench is connected with a feeding and discharging frame, and the feeding and discharging frame is installed with a chain plate type conveying mechanism, the chain plate type conveying mechanism is connected with a fixed suction disc assembly through a support control assembly, and the right side of the feeding and discharging frame is connected with an electric telescopic rod.

[0006] Preferably, the upper surface of the workbench is internally installed with a groove for collecting impurities.

[0007] Preferably, the inside of the support frame is internally installed with a threaded rod, the sliding block installed on the back side of the moving frame is slidingly connected with the groove internally formed in the support frame, and the inside of the sliding block is internally threaded with a threaded rod, and the rear ends of the grinding wheel mechanism and the milling cutter mechanism are connected with the motor inside the moving frame.

[0008] Preferably, the chain plate type conveying mechanism comprises a chain plate assembly and a chain assembly, the left and right sides of the chain plate assembly are both installed with a chain assembly, the front and rear inner sides of the chain plate assembly and the chain assembly are both installed with conveying rollers, and the left and right ends of the conveying rollers are both rotatably connected with the left and right side surfaces of the feeding and discharging frame.

[0009] Preferably, the support and regulation assembly comprises guide frames equidistantly mounted on the chain plate assembly, the guide frames are arranged in inverted "U" shape, guide rods are mounted in the guide frames, the outer sides of the guide rods are penetrated by "7" shaped connecting frames, guide rods are connected to the inner sides of the lower ends of the connecting frames, connecting springs are nested to the outer sides of the left ends of the guide rods, the upper ends of the connecting frames are connected with the fixed suction disc assembly, first magnet blocks are mounted to the right sides of the lower ends of the connecting frames, second magnet blocks are mounted to the inner walls of the right sides of the guide frames, the second magnet blocks have opposite magnetic poles with the first magnet blocks, and the connecting frames are connected with the fixed suction disc assembly through the sliding structure of the electric telescopic rods.

[0010] Preferably, the mounting assembly comprises screws, and the protective plate is mounted on the front side of the moving frame through the screws.

[0011] Preferably, the outer side of the grinding wheel mechanism is fixed with a push rod, and the height of the push rod is greater than the shortest distance between the grinding wheel mechanism and the protective plate.

[0012] Preferably, the mounting assembly comprises a rotating rod penetrating the inner part of the protective plate, the rear end of the rotating rod is rotatably connected with the moving frame, and a spiral spring is nested to the outer side of the rear end of the rotating rod.

[0013] Preferably, the right side of the protective plate is mounted with a brush assembly.

[0014] Another technical scheme provided by the present application is to provide a method for automatically feeding and discharging workpieces and milling steps, comprising the following steps: S1: first, place a mechanical hand on the front and rear sides of the workbench, then the rear mechanical hand pushes the workpiece and places it on the last side of the fixed suction disc assembly above the chain plate conveying mechanism; S2: the chain plate conveying mechanism rotates to convey, so that the fixed suction disc assembly drives the workpiece to move forward; S3: stop the rotating conveying of the chain plate conveying mechanism, then start the electric telescopic rod, the output end of the electric telescopic rod drives the left corresponding connecting frame to move left, the upper end of the connecting frame drives the fixed suction disc assembly and the workpiece to move left, when the workpiece moves to contact the fixed abutting plate; S4: when the threaded rod rotates, the moving frame moves downward, the moving frame drives the grinding wheel mechanism and the milling cutter mechanism to move downward, at the same time, the grinding wheel mechanism and the milling cutter mechanism rotate through the motor in the moving frame, then the milling cutter mechanism contacts the workpiece below to coarsely mill the workpiece, then the grinding wheel mechanism finely mills and grinds the step-shaped area; S5: After the machining is completed, the output end of the electric telescopic rod moves left to reset, the connecting frame automatically moves right to reset through the storage force of the connecting spring, then the chain plate type conveying mechanism performs rotating conveying operation again, moves another fixed chuck assembly with a workpiece adsorbed to the right side of the fixed abutting plate, and performs machining operation on the next workpiece again, so that the intermittent rotation of the chain plate type conveying mechanism enables the plurality of fixed chuck assemblies to automatically and intermittently feed and discharge the workpieces, and automatically clamp and position and automatically contact and clamp and position, and the front mechanical arm can take down the workpiece machined on the fixed chuck assembly.

[0015] Compared with the prior art, the automatic milling step feeding and discharging grinding step equipment and method has the beneficial effects that: the cooperation of the movement of one of the fixed chuck assemblies and the fixed abutting plate can directly position and fix the workpiece, without manually positioning and fixing the workpiece, saving time and effort, and improving the working efficiency of the later grinding step equipment, and the specific contents are as follows: The plurality of fixed chuck assemblies installed at equal intervals on the chain plate type conveying mechanism can simultaneously adsorb and fix a plurality of workpieces, the rotation of the chain plate type conveying mechanism can drive the plurality of fixed chuck assemblies to automatically and intermittently feed, and the movement of one of the fixed chuck assemblies driven by the electric telescopic rod can automatically feed and discharge the workpiece, which is convenient to operate, and the cooperation of the movement of one of the fixed chuck assemblies and the fixed abutting plate can directly position and fix the workpiece, without manually positioning and fixing the workpiece, saving time and effort, and improving the working efficiency of the later grinding step equipment; The storage force of the connecting spring enables the connecting frame and the fixed chuck assembly to automatically and reversely reset, and the adsorption of the first magnet block and the second magnet block with different names of magnetic poles facilitates the fixation of the reset connecting frame, avoiding the shaking of the connecting frame; The setting of the protective plate avoids the contact of the impurities splashed during the rough milling of the milling cutter mechanism with the grinding wheel mechanism, thereby facilitating the protection of the grinding wheel mechanism, and also avoiding the falling of the debris generated during the finish machining of the step surface of the later grinding wheel mechanism onto the milling cutter mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic diagram of the three-dimensional structure of the present application; Figure 2 is a schematic diagram of the three-dimensional structure of the present application Figure 1 is a schematic diagram of the enlarged structure at A in the present application; Figure 3 is a schematic diagram of the left view structure of the present application; Figure 4 is a schematic diagram of the bottom view structure of the present application; Figure 5 is a schematic diagram of the chain plate type conveying mechanism of the present application; Figure 6 This is a schematic diagram of the three-dimensional structure of the guide frame of the present invention; Figure 7 This is a schematic diagram of the left sectional view of the support frame of the present invention; Figure 8 This is a schematic diagram of the protective plate structure in Embodiment 2 of the present invention; Figure 9 For the present invention Figure 8 Enlarged structural diagram at point B.

[0017] In the diagram: 1. Workbench; 101. Groove; 2. Support frame; 3. Threaded rod; 4. Moving frame; 5. Grinding wheel mechanism; 51. Push rod; 6. Loading / unloading rack; 7. Chain plate conveyor mechanism; 71. Chain plate assembly; 72. Chain assembly; 8. Electric telescopic rod; 9. Connecting frame; 91. First magnet block; 10. Fixed suction cup assembly; 11. Fixed abutment plate; 12. Milling cutter mechanism; 13. Guide frame; 14. Guide rod; 15. Connecting spring; 16. Second magnet block; 17. Protective plate; 171. Rotating rod; 172. Brush assembly; 173. Spiral spring. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-9 The present invention provides the following technical solution: Example 1: The automatic milling and grinding equipment and method for steps in this example can not only automatically load and unload workpieces, but also automatically clamp and position them, eliminating the need for manual clamping and positioning. Therefore, it is convenient to operate and can improve the working efficiency of subsequent step grinding equipment. For the specific structure, please refer to the attached diagram. Figures 1-7 As shown, the device includes a workbench 1 and a support frame 2 installed on its rear side. A movable frame 4 is connected to the front side of the support frame 2. A grinding wheel mechanism 5, a protective plate 17, and a milling cutter mechanism 12 are installed sequentially from top to bottom on the front side of the movable frame 4. The front side of the movable frame 4 is connected to the protective plate 17 through a mounting assembly. A fixed abutment plate 11 is fixed above the workbench 1. A loading and unloading rack 6 is connected to the right side of the workbench 1. A chain plate conveyor mechanism 7 is installed inside the loading and unloading rack 6. The chain plate conveyor mechanism 7 is connected to a fixed suction cup assembly 10 through a support and adjustment assembly. An electric telescopic rod 8 is connected to the right side of the loading and unloading rack 6.

[0020] The upper surface of the workbench 1 is internally provided with a groove 101 for collecting impurities, the support frame 2 is internally provided with a threaded rod 3, the sliding block installed on the rear side of the moving frame 4 is in sliding connection with the groove in the support frame 2, the inside of the sliding block is threaded with the threaded rod 3, the rear ends of the grinding wheel mechanism 5 and the milling cutter mechanism 12 are connected with the motors in the moving frame 4, the chain plate conveying mechanism 7 comprises a chain plate assembly 71 and a chain assembly 72, the left and right sides of the chain plate assembly 71 are provided with the chain assembly 72, the front and rear inner sides of the chain plate assembly 71 and the chain assembly 72 are provided with conveying rollers, and the left and right ends of the conveying rollers are rotatably connected with the left and right side surfaces of the feeding and discharging frame 6, the support control assembly comprises guide frames 13 which are installed at equal intervals on the chain plate assembly 71, the guide frames 13 are in inverted "U" shape, the guide frames 13 are internally provided with guide rods 14, the guide rods 14 are externally provided with a "7" shaped connecting frame 9, the lower end of the connecting frame 9 is internally threaded with the guide rod 14, the left end of the guide rod 14 is externally nested with a connecting spring 15, the upper end of the connecting frame 9 is connected with the fixed suction disc assembly 10, the lower end of the connecting frame 9 is provided with a first magnet block 91 on the right side, the right side inner wall of the guide frame 13 is provided with a second magnet block 16, the second magnet block 16 and the first magnet block 91 are of different magnetic poles, the connecting frame 9 forms a sliding structure through the electric telescopic rod 8, the mounting assembly comprises a screw, and the protective plate 17 is provided on the front side of the moving frame 4 through the screw.

[0021] Firstly, a mechanical hand is placed on the front and rear sides of the workbench 1, then the rear mechanical hand pushes the workpiece and places it on the last fixed suction disc assembly 10 above the chain plate conveying mechanism 7, so that the fixed suction disc assembly 10 adsorbs and fixes the workpiece, the workpiece is a metal knife holder of a scraper or an elastic rubber strip, then one end of the conveying roller in the chain plate conveying mechanism 7 is connected with the motor outside, then the conveying roller drives the chain plate conveying mechanism 7 to rotate and convey, so that the fixed suction disc assembly 10 drives the workpiece to move forward, when the fixed suction disc assembly 10 adsorbing the workpiece moves to the right side of the fixed abutting plate 11, the rotating conveying work of the chain plate conveying mechanism 7 is stopped, then the electric telescopic rod 8 is started, the output end of the electric telescopic rod 8 drives the corresponding connecting frame 9 on the left side to move left, at this time the lower end of the connecting frame 9 slides left on the outside of the guide rod 14, at this time the connecting spring 15 is extruded and stored, at the same time the first magnet block 91 is separated from the second magnet block 16, the upper end of the connecting frame 9 drives the fixed suction disc assembly 10 and the workpiece to move left, when the workpiece moves to contact the fixed abutting plate 11, the work of the electric telescopic rod 8 is stopped.

[0022] After the workbench 1 is started, the hydraulic rod inside the right side of the workbench 1 drives the support frame 2 to move to the right, the position of the support frame 2 is fine-tuned, the positions of the grinding wheel mechanism 5 and the milling cutter mechanism 12 are adjusted, after the adjustment, the upper end of the threaded rod 3 is connected with the servo motor outside, the servo motor drives the threaded rod 3 to rotate, the threaded rod 3 drives the moving frame 4 to move downward when rotating, the moving frame 4 drives the grinding wheel mechanism 5 and the milling cutter mechanism 12 to move downward, at the same time, the grinding wheel mechanism 5 and the milling cutter mechanism 12 rotate through the motor inside the moving frame 4, then the milling cutter mechanism 12 contacts the workpiece below to perform rough machining of the workpiece, part of the side surface of the workpiece is machined into different height planes to form a step shape, then the grinding wheel mechanism 5 performs finishing machining on the step-shaped area, meanwhile, cooling liquid and dust removal mechanism can be used, this part is prior art and will not be described in detail. Since the milling cutter mechanism 12 performs rough machining of the step from top to bottom, the generated impurities can fall downward well, meanwhile, the generated impurities during the rough machining of the milling cutter mechanism 12 can be shielded through the fixedly installed protective plate 17, to avoid the impurities splashing and contacting the grinding wheel mechanism 5, the generated debris during the finishing machining of the step surface by the grinding wheel mechanism 5 can first fall on the protective plate 17, then the debris falls leftward and downward through the protective plate 17, to avoid the debris falling on the milling cutter mechanism 12, after the machining is completed, the output end of the electric telescopic rod 8 moves leftward to reset, then the connecting frame 9 automatically moves rightward to reset through the stored force of the connecting spring 15, then the first magnet block 91 is adsorbed and fixed with the second magnet block 16, then the chain plate type conveying mechanism 7 rotates again to perform conveying operation, to move another fixed chuck assembly 10 adsorbed with a workpiece to the right side of the fixed abutting plate 11, then the next workpiece is machined again as described above, therefore, through the intermittent rotation of the chain plate type conveying mechanism 7, and the use of the electric telescopic rod 8, multiple fixed chuck assemblies 10 can automatically and intermittently feed and discharge the workpieces, and automatically clamp and position and automatically contact and clamp and position, the operation is convenient, and the machining efficiency is improved, the mechanical hand on the front side can take down the machined workpiece on the fixed chuck assembly 10.

[0023] In the embodiment, the automatic milling step up and down material milling step equipment and method can avoid the debris and impurities remaining on the protective plate 17 to affect the use of the protective plate 17 in the later period, the specific structure is referred to the drawings. Figure 1 The outer side of the grinding wheel mechanism 5 is fixedly installed with a push rod 51, the height of the push rod 51 is greater than the shortest distance between the grinding wheel mechanism 5 and the protective plate 17, the installation assembly includes a rotating rod 171 penetrating the inside of the protective plate 17, the rear end of the rotating rod 171 is rotationally connected with the moving frame 4, the rear end of the rotating rod 171 is externally nested with a vortex spring 173, and the right side surface of the protective plate 17 is installed with a brush assembly 172.

[0024] When the grinding wheel mechanism 5 rotates to drive the outer push rod 51 to rotate, the push rod 51 rotates to contact the upper right side of the protective plate 17, and a downward pushing force is applied to the upper right side of the protective plate 17, so that the protective plate 17 and the rotating rod 171 rotate by a certain angle, and the vortex spring 173 is energized at this time. When the push rod 51 rotates to separate from the protective plate 17, the rotating rod 171 and the protective plate 17 are automatically driven to rotate in the opposite direction and reset by the energy storage of the vortex spring 173. Through repeated operation, the protective plate 17 can be driven to rotate clockwise and counterclockwise by a certain angle. Therefore, impurities and debris are prevented from remaining on the upper surface of the protective plate 17. When the protective plate 17 rotates, the brush assembly 172 can be swung, so that the brush assembly 172 can brush off the impurities on the stepped surface machined by the cutter mechanism 12, thereby facilitating the fine grinding work of the grinding wheel mechanism 5.

[0025] In order to better show the specific use method of the automatic milling step feeding and discharging step grinding device, the use method of the automatic milling step feeding and discharging step grinding device in the embodiment includes the following steps: First step: first, place a mechanical hand on the front and rear sides of the workbench 1, and then the rear mechanical hand pushes and places the workpiece on the last side of the chain plate conveying mechanism 7 above the fixed suction disc assembly 10 for suction and fixation; Second step: the chain plate conveying mechanism 7 rotates to convey, so that the fixed suction disc assembly 10 drives the workpiece to move forward; Third step: stop the rotating conveying work of the chain plate conveying mechanism 7, and then start the electric telescopic rod 8. The output end of the electric telescopic rod 8 drives the left corresponding connecting frame 9 to move left. The upper end of the connecting frame 9 drives the fixed suction disc assembly 10 and the workpiece to move left. When the workpiece moves to abut and contact the fixed abutting plate 11; Fourth step: when the threaded rod 3 rotates, the moving frame 4 moves downward, and the moving frame 4 drives the grinding wheel mechanism 5 and the cutter mechanism 12 to move downward. At the same time, the grinding wheel mechanism 5 and the cutter mechanism 12 rotate through the motor in the moving frame 4. Then the cutter mechanism 12 contacts the workpiece below to perform rough milling of the workpiece. Then the grinding wheel mechanism 5 performs fine grinding of the stepped region; The output end of the electric telescopic rod 8 moves left to reset after the machining is completed, the connecting frame 9 automatically moves right to reset through the force storage of the connecting spring 15, then the chain plate type conveying mechanism 7 performs the rotating conveying operation again, moves another fixed chuck assembly 10 with the workpiece adsorbed to the right side of the fixed abutting plate 11, and performs the machining operation on the next workpiece again, so that the intermittent rotation of the chain plate type conveying mechanism 7 can make the plurality of fixed chuck assemblies 10 automatically and intermittently feed the workpieces, and automatically clamp and position and automatically contact and clamp and position, and the front side mechanical arm can take down the workpiece on the fixed chuck assembly 10 that has been machined.

[0026] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can make modifications to the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An automatic milling step unloading and grinding step device, comprising a workbench (1) and a support frame (2) mounted on the back side thereof, and a moving frame (4) connected to the front side of the support frame (2), characterized in that: The front side of the moving frame (4) is sequentially provided with a grinding wheel mechanism (5), a protective plate (17) and a milling cutter mechanism (12) from top to bottom, and the front side of the moving frame (4) is connected with the protective plate (17) through a mounting assembly, the upper side of the workbench (1) is fixedly provided with a fixed abutting plate (11), the right side of the workbench (1) is connected with an upper and lower feeding frame (6), and the chain plate conveying mechanism (7) is installed in the upper and lower feeding frame (6), the chain plate conveying mechanism (7) is connected with the fixed suction disc assembly (10) through a supporting and regulating assembly, and the right side of the upper and lower feeding frame (6) is connected with an electric telescopic rod (8).

2. The automatic step milling and unloading step grinding device according to claim 1, characterized in that: The upper surface of the workbench (1) is internally provided with a groove (101) for collecting impurities.

3. The automatic step milling and unloading step grinding device according to claim 1, characterized in that: The inside of the supporting frame (2) is provided with a threaded rod (3), the rear side of the moving frame (4) is provided with a sliding block which is slidingly connected with the groove in the supporting frame (2), and the inside of the sliding block is provided with the threaded rod (3) which is threaded connected therewith, and the rear ends of the grinding wheel mechanism (5) and the milling cutter mechanism (12) are connected with the motor in the moving frame (4).

4. The automatic step milling and unloading step grinding device according to claim 1, characterized in that: The chain plate conveying mechanism (7) comprises a chain plate assembly (71) and a chain assembly (72), the left and right sides of the chain plate assembly (71) are provided with the chain assembly (72), the front and rear inner sides of the chain plate assembly (71) and the chain assembly (72) are provided with conveying rollers, and the left and right ends of the conveying rollers are rotatably connected with the left and right sides of the upper and lower feeding frame (6).

5. The automatic step milling and unloading step grinding device according to claim 4, characterized in that: The supporting and regulating assembly comprises a guide frame (13) which is installed on the chain plate assembly (71) at equal intervals, the guide frame (13) is provided in an inverted "U" shape, the inside of the guide frame (13) is provided with a guide rod (14), the outside of the guide rod (14) is provided with a connecting frame (9) which is provided in a "7" shape, the inside of the lower end of the connecting frame (9) is provided with the guide rod (14), the left end of the guide rod (14) is provided with a connecting spring (15), the upper end of the connecting frame (9) is connected with the fixed suction disc assembly (10), the lower end of the connecting frame (9) is provided with a first magnet block (91) on the right side, the right side inner wall of the guide frame (13) is provided with a second magnet block (16), the second magnet block (16) and the first magnet block (91) are of different magnetic poles, and the connecting frame (9) constitutes a sliding structure through the electric telescopic rod (8).

6. The automatic step milling and unloading step grinding device according to claim 1, characterized in that: The mounting assembly comprises a screw, the protective plate (17) is mounted on the front side of the moving frame (4) through the screw, and the protective plate (17) is provided in an arc shape.

7. The automatic step milling and unloading step milling device according to claim 1, characterized in that: The outside of the grinding wheel mechanism (5) is fixedly provided with a push rod (51), and the height of the push rod (51) is greater than the shortest distance between the grinding wheel mechanism (5) and the protective plate (17).

8. The automatic step milling and unloading step grinding device according to claim 7, characterized in that: The mounting assembly comprises a rotating rod (171) which penetrates the inside of the protective plate (17), the rear end of the rotating rod (171) is rotatably connected with the moving frame (4), and the rear end of the rotating rod (171) is provided with a volute spring (173) which is nestedly connected.

9. The automatic step milling and unloading device according to claim 8, characterized in that: The right side of the protective plate (17) is provided with a brush assembly (172).

10. A method in an automatic milling step feeding and discharging bench step grinding device, comprising the following steps: S1: First, place a mechanical hand on the front and rear sides of the workbench (1), then the rear mechanical hand pushes the workpiece and places it on the last side of the chain plate conveying mechanism (7) above the fixed suction disc assembly (10) to be adsorbed and fixed; S2: The chain plate conveying mechanism (7) rotates to convey, so that the fixed suction disc assembly (10) drives the workpiece to move forward; S3: Stop the rotating conveying work of the chain plate conveying mechanism (7), then start the electric telescopic rod (8), the output end of the electric telescopic rod (8) drives the left corresponding connecting frame (9) to move left, the upper end of the connecting frame (9) drives the fixed suction disc assembly (10) and the workpiece to move left, when the workpiece moves to adhere to the fixed abutting plate (11) contact; S4: When the threaded rod (3) rotates, it drives the moving frame (4) to move downward, the moving frame (4) drives the grinding wheel mechanism (5) and the milling cutter mechanism (12) to move downward, at the same time the grinding wheel mechanism (5) and the milling cutter mechanism (12) rotate through the motor in the moving frame (4), then the milling cutter mechanism (12) contacts the workpiece below, and the workpiece is rough machined, then the grinding wheel mechanism (5) is machined again. The step-shaped area is finished and polished; S5: After processing, the output end of the electric telescopic rod (8) moves left to reset, the connecting frame (9) automatically moves right to reset through the storage force of the connecting spring (15), then the chain plate conveying mechanism (7) rotates again. Conveying work, moving another fixed suction disc assembly (10) adsorbed with the workpiece to the right side of the fixed abutting plate (11), again to the next workpiece processing work, so that the intermittent rotation of the chain plate conveying mechanism (7) can automatically intermittent feeding of the workpiece by the multiple fixed suction disc assemblies (10), and automatic clamping positioning and automatic contact clamping positioning, the front mechanical hand can take the workpiece processed by the fixed suction disc assembly (10).

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