Casting surface polishing device and polishing method

Abstract

The invention relates to the field of polishing equipment, in particular to a casting surface polishing device and method.The polishing equipment is installed on the front side of the upper end of a base, a material changing component is installed on the rear side of the base, and after a containing box is placed in an outer cylinder, a magnetic polishing needle can be attracted into the containing box under attraction of an inner electromagnetic ring; the magnetic polishing needles can continuously roll on the surface of the wear-resistant casting and generate impact under the action of centrifugal force generated during rotation of the placing boxes and attraction force of magnetic force, the wear-resistant casting can be fully and effectively polished, and the multiple placing boxes can be sequentially and alternately placed in the outer cylinder by controlling the material changing component during use. The steps that an operator manually places, cleans and replaces the wear-resistant casting are omitted, operation of the user is facilitated, and the operation burden of the operator can be relieved.

Description

Technical Field

[0001] The invention relates to the field of polishing equipment, in particular to a casting surface polishing device and a polishing method. Background Art

[0002] During the production and processing of castings, various stains and oxide layers are often attached, and they need to be cleaned first. After cleaning, grinders and other equipment can be used to perform preliminary grinding and trimming of small defects and burrs on the surface of the castings. After grinding, fine polishing of the castings can make the surface of the castings smoother and improve its hardness and corrosion resistance. The commonly used polishing methods include mechanical polishing and chemical polishing. Mechanical polishing is a surface treatment method that uses mechanical tools and abrasive materials to process the surface of the workpiece to achieve a flat, smooth, scratch-free and high-gloss surface. At present, in order to use mechanical polishing To ensure the integrity of the casting surface polishing, the casting is usually placed in a polishing container with polishers, and the high-frequency vibration and rotation of the polishing container are used to drive the polishers to polish the casting. Since the polishing container is filled with a large number of polishers, the casting cannot directly enter the polishing seeds when placed in the polishing container. The polishing equipment needs to repeatedly drive the polishers to roll and engulf the casting before the casting can be effectively polished. In addition, the casting is covered by the polishers during polishing. After polishing is completed, the polishing equipment needs to be paused, and the casting is salvaged for observation. After determining that the polishing effect meets the standard, the casting can be manually replaced, resulting in low polishing efficiency. Summary of the invention

[0003] In view of the deficiencies of the prior art, the present invention provides a casting surface polishing device and a polishing method, which effectively solve the problems mentioned in the above background technology.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is:

[0005] A casting surface polishing device and polishing method, wherein a polishing device is installed on the front side of the upper end of the base, and a material replacement component is installed on the rear side of the base;

[0006] The polishing device comprises a bottom shell fixedly connected to the upper end of the base and an outer cylinder fixedly connected to the upper side of the bottom shell, the lower side of the surface of the outer cylinder is in an inwardly inclined structure and a plurality of rectangular first communication holes are provided on the inclined part, the outer sides of the first communication holes are respectively provided with closing plates that can swing outward, the inner ends of the closing plates are respectively fixedly connected with electromagnetic plates, a power supply component is installed on the upper side of the surface of the outer cylinder, and the power supply component supplies power to the electromagnetic plate under normal conditions, so that the electromagnetic plate generates magnetic attraction for the magnetic polishing needle;

[0007] The material changing component includes a plurality of placement boxes and a driving component for controlling the plurality of placement boxes to be placed alternately in the outer cylinder and driving the placement boxes to rotate. The inner bottom end of the placement box is fixedly connected with an inner electromagnetic ring, and a plurality of second connecting holes are opened on the surface of the placement box. When the placement box is placed in the outer cylinder, a structure is formed in which the electromagnetic plate is powered off and the power supply component supplies power to the inner electromagnetic ring.

[0008] Preferably, the driving component includes a control component for controlling the placement boxes to be alternately placed in the outer cylinder and a transmission component for controlling the rotation of the placement boxes, the control component includes a limiting column fixedly connected to the rear side of the base surface and a guide cylinder rotatably connected to the surface of the limiting column, the surface of the guide cylinder is rotatably connected with a linkage ring, the upper end of the linkage ring is fixedly connected with track plates distributed in an annular manner and equal to the number of the placement boxes, the middle of the placement boxes is respectively fixedly connected with a driving rod, the upper ends of the driving rods are respectively rotatably connected with connecting frames, the lower ends of the connecting frames are vertically slidably connected with the track plates, the upper sides of the surfaces of the limiting columns are provided with limited motion grooves, the other ends of the connecting frames are respectively fixedly connected with pin shafts, and the pin shafts are respectively slidably matched with the limiting grooves;

[0009] The limiting groove includes an annular groove and a vertical groove which is perpendicular to the annular groove and connected to the annular groove at the upper end. The pin shaft can drive the placement box to be placed on the outside of the outer cylinder through the connecting frame by sliding cooperation with the annular groove. When the connecting frame is rotated so that the pin shaft corresponds to the vertical groove, the pin shaft can slide downward along the vertical groove and drive the placement box to be placed on the inside of the outer cylinder through the connecting frame.

[0010] Preferably, a plurality of guide grooves are downwardly opened at the upper end of the guide cylinder, and a slope structure inclined outward is opened on one side in the same direction of the guide grooves. The pin shafts are respectively located between the guide grooves, and the slope structure can push the pin shaft to move upward when the guide cylinder rotates.

[0011] Preferably, the lower end of the guide cylinder is fixedly connected to a guide ring, which is coaxially placed on the lower side of the linkage ring, and the bottom of the linkage ring is provided with arc-shaped sliding grooves equal to the number of placement boxes, and the inside of the arc-shaped sliding grooves is coaxially fixedly connected with an arc-shaped rod, the surface of the arc-shaped rod is respectively sleeved with an arc spring, and the inside of the arc-shaped sliding grooves is slidably connected with an installation slider, the installation slider is fixedly connected to one end of the arc spring, the bottom of the installation slider is respectively fixedly connected to a driving plate, the bottom of the driving plate is fixedly connected to the guide ring, and the circumferential surface of the guide ring is respectively fixedly connected with a linkage gear, one side of the linkage gear is meshed with a driving gear, and a first motor is arranged on the upper side of the driving gear, the first motor is fixedly connected to the base, and the output end of the first motor is fixedly connected to the middle part of the driving gear.

[0012] Preferably, connecting grooves are vertically opened on the surface of the track plate, and a connecting slider that can move up and down is slidably connected inside the connecting groove. The connecting slider is fixedly connected to the lower end of the connecting frame, and a push spring is fixedly connected to the upper end of the connecting slider, and the upper end of the push spring is fixedly connected to the upper end of the connecting groove.

[0013] Preferably, the transmission component includes a second motor fixedly connected to the bottom of the base, the output end of the second motor is fixedly connected to a vertically arranged connecting shaft, the connecting shaft is rotatably connected to the base, and the upper end of the connecting shaft is fixedly connected to a second connecting claw; the upper end of the driving rod is fixedly connected to a second pulley, and the surface of the connecting frame on the rear side of the second pulley is rotatably connected to a first pulley, the surfaces of the first pulley and the second pulley are respectively covered with a transmission belt, and the lower side of the first pulley is coaxially fixedly connected to a first connecting claw, and when the placing box is placed inside the outer cylinder, the first connecting claw is meshed with the second connecting claw.

[0014] Preferably, the power supply component includes a conductive protrusion installed in the middle of the inner outer cylinder, and the left and right sides of the opening of the outer cylinder are respectively fixedly connected with a mounting box with an inner end opening, and the interior of the mounting box is fixedly connected with an inner conductive sheet and an outer conductive sheet symmetrically arranged up and down, the inner conductive sheet is electrically connected to the conductive protrusion, and the outer conductive sheet is electrically connected to the electromagnetic plate, and the upper side of the surface of the outer cylinder is slidably connected to a conductive end at a corresponding position of the mounting box, and an elastic component is installed between the lower side of the conductive end and the outer cylinder, and when the conductive end moves downward, it can be connected with the inner conductive sheet to supply power to the conductive protrusion;

[0015] The upper side of the placement box is connected with a mounting ring. When the placement box is placed in the outer tube, the mounting ring is placed at the opening of the outer tube. When the placement box is placed inside the outer tube, the conductive protruding rod is connected with the inner electromagnetic ring and the mounting ring presses the conductive end to move downward and connect with the inner conductive sheet. When the conductive end is not pressed, the conductive end is pushed by the elastic component to disconnect the connection with the inner conductive sheet and then connect with the outer conductive sheet.

[0016] The conductive end includes two adjustment plates which are respectively slidably connected to both sides of the opening of the outer cylinder and correspond to the installation box. The upper and lower ends of the adjustment plate are respectively fixedly connected with the first conductive sheet and the second conductive sheet. The first conductive sheet is located on the upper side of the inner conductive sheet, and the second conductive sheet is located on the lower side of the outer conductive sheet. When the adjustment plate moves downward, the first conductive sheet is connected to the inner conductive sheet, and when the adjustment plate moves upward, the second conductive sheet is connected to the outer conductive sheet.

[0017] Preferably, the elastic component includes a second return spring, the inner ends of the adjustment plates are fixedly connected with adjustment sliders, the outer cylinder surfaces corresponding to the adjustment sliders are respectively provided with vertically arranged adjustment grooves, the adjustment sliders are respectively slidably connected with the adjustment grooves, the second return spring is located on the lower side of the adjustment slider, and the upper and lower ends of the second return spring are respectively fixedly connected with the adjustment slider and the inner wall of the adjustment groove.

[0018] Preferably, the bottom of the closing plate is fixedly connected with a swing plate, the middle of the swing plate is hinged to the bottom of the outer cylinder, the conductive protrusion is vertically slidably connected to the bottom of the outer cylinder, and a circular pressure plate is fixedly connected to the lower side of the surface of the conductive protrusion, and the outer sides of the pressure plate are respectively placed on the upper sides of the inner ends of multiple swing plates. When the conductive protrusion moves downward, the inner end of the swing plate can be pressed downward by the pressure plate, so that the outer end of the swing plate swings inward and drives the closing plate to engage with the corresponding first connecting holes respectively; the bottom of the conductive protrusion is slidably connected to a vertically arranged stabilizing shaft, the bottom of the stabilizing shaft is fixedly connected to the inner wall of the bottom shell, and the surface of the stabilizing shaft is sleeved with a first reset spring, and the first reset spring is located on the lower side of the conductive protrusion.

[0019] Preferably, the method comprises the following steps: Step 1: placing the wear-resistant castings to be polished into the placement box one by one, starting the first motor to drive the guide cylinder to rotate so that one of the placement boxes is placed into the outer cylinder, the installation ring presses the adjustment plate to move downward so that the second conductive sheet is disconnected from the outer conductive sheet, the first conductive sheet is connected to the inner conductive sheet, the electromagnetic plate loses power, the inner electromagnetic ring is connected to the conductive protruding rod so that the inner electromagnetic ring is energized, and the inner electromagnetic ring generates magnetic force to adsorb the magnetic polishing needle into the placement box;

[0020] Step 2: The placing box is pressed down to push the conductive protruding rod downward, and the swing plate is pressed to swing inward by the pressing plate, so as to drive the closing plate to engage with the first connecting hole;

[0021] Step 3: Start the second motor, and drive the placement box to rotate rapidly through the driving rod. Under the dual effects of centrifugal force and magnetic force generated when the placement box rotates rapidly, the magnetic polishing needle is driven to roll rapidly in the placement box and impact the wear-resistant casting, so as to quickly polish the wear-resistant casting. At this time, the magnetic size of the inner electromagnetic ring can be adjusted to adapt the polishing action;

[0022] Step 4: Control the first motor to drive the guide cylinder to rotate again to move the placement box in the outer cylinder out. During the process of moving the placement box out, the inner electromagnetic ring is disconnected from the conductive protruding rod, the inner electromagnetic ring loses power, and the conductive protruding rod moves upward to reset so that the pressure plate no longer presses the swing plate. The closing plate swings outward to reset under the action of gravity, and the pressure plate no longer presses the adjustment plate. After the adjustment plate loses pressure, it resets upward, so that the first conductive sheet is connected to the outer conductive sheet, and the electromagnetic plate is energized to generate magnetic force to re-absorb the internal magnetic polishing needle;

[0023] Step 5: When the first motor drives the guide cylinder to rotate and the polished placement box is removed, a new placement box enters the outer cylinder for polishing operation;

[0024] Step 6: Remove the wear-resistant casting from the storage box.

[0025] The present invention has novel structure, ingenious design, simple and convenient operation, and has the following advantages compared with the prior art:

[0026] 1. After the placement box is placed in the outer cylinder, the inner electromagnetic ring will be electrified to generate magnetic force, and the electromagnetic plate will lose the electromagnetic force and disappear. The magnetic polishing needle will be attracted by the inner electromagnetic ring and adsorbed into the placement box, and driven by the driving component to drive the placement box to rotate rapidly. The centrifugal force generated when the placement box rotates and the magnetic attraction force can make the magnetic polishing needle continuously roll and impact on the surface of the wear-resistant casting, so that the wear-resistant casting can be fully and effectively polished. After the polishing is completed, when the material replacement component drives the placement box to move upward, the inner electromagnetic ring loses its magnetic force after being disconnected from the conductive protruding rod, and the electromagnetic plate restores its magnetic force, adsorbing the magnetic polishing needle in the placement box, and it will not remain on the wear-resistant casting. The operator does not need to manually clean the wear-resistant casting, which effectively saves working time and can fully improve work efficiency.

[0027] 2. When the device is in use, multiple placement boxes can be placed alternately in the outer cylinder by controlling the material changing component, and then removed after polishing is completed, eliminating the steps of manual placement, cleaning and replacement of wear-resistant castings by the operator, making it convenient for the user to operate and reducing the operator's operating burden. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The present invention is a schematic diagram of the overall structure of a casting surface polishing device and a polishing method.

[0029] Figure 2 The present invention is a schematic diagram of the electromagnetic plate installation structure of a casting surface polishing device and polishing method.

[0030] Figure 3 The present invention is a schematic diagram of a placement box placement structure of a casting surface polishing device and a polishing method.

[0031] Figure 4 The present invention is a schematic diagram of the conductive protruding rod installation structure of a casting surface polishing device and a polishing method.

[0032] Figure 5 The present invention is a schematic diagram of the conductive end structure of a casting surface polishing device and a polishing method.

[0033] Figure 6 The present invention is a schematic diagram of a pin installation structure of a casting surface polishing device and a polishing method.

[0034] Figure 7 The present invention is a schematic diagram of the matching structure of a guide cylinder and a limit column in a casting surface polishing device and a polishing method.

[0035] Figure 8The present invention is a schematic diagram of a track plate installation structure of a casting surface polishing device and a polishing method.

[0036] Fig. 9 The present invention is a schematic diagram of an arc spring installation structure of a casting surface polishing device and a polishing method.

[0037] Fig.10 The first schematic diagram of the transmission component structure of a casting surface polishing device and polishing method of the present invention.

[0038] Fig.11 This is a second schematic diagram of the transmission component structure of a casting surface polishing device and polishing method of the present invention.

[0039] Fig.12 The first schematic diagram of the conductive protruding rod structure of a casting surface polishing device and polishing method of the present invention.

[0040] Fig.13 The second schematic diagram of the conductive protruding rod structure of a casting surface polishing device and polishing method of the present invention.

[0041] Numbers in the figure: 1-base, 2-bottom shell, 3-outer cylinder, 5-first connecting hole, 6-closing plate, 7-driving rod, 8-placing box, 9-inner electromagnetic ring, 10-second connecting hole, 11-swinging plate, 12-pressing plate, 13-conductive protruding rod, 14-stabilizing shaft, 15-first return spring, 16-mounting ring, 17-adjusting plate, 19-second return spring, 20-first conductive sheet, 21-second conductive sheet, 22-inner conductive sheet, 23-outer conductive sheet, 24-interlocking ring, 25-track plate, 26-connecting slider, 27-pin shaft, 28-pushing spring, 29-limiting column, 30-guide cylinder, 31-annular groove, 32-vertical groove, 33-connecting frame, 35-guide groove, 36-interlocking gear, 37-first motor, 38-driving gear, 39-driving plate, 40-connecting slide groove, 41-arc spring, 42-installing slider, 43-first pulley, 44-second pulley, 45-first connecting claw, 46-second connecting claw, 47-connecting shaft, 48-second motor, 49-installing box, 50-guide ring, 51-electromagnetic plate, 52-convex rod base, 53-convex rod rotating column, 54-convex rod groove, 55-first conductive slip ring, 56-second conductive slip ring, 57-first wire, 58-first brush, 59-second brush, 60-first conductive lower pressure ring, 61-second conductive lower pressure ring, 62-first conductive upper pressure ring, 63-second conductive upper pressure ring, 64-second wire, 65-third wire. DETAILED DESCRIPTION

[0042] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0043] like Figure 1-13 As shown, the present invention provides a casting surface polishing device and a polishing method, comprising a base 1 and a magnetic polishing needle, wherein a polishing device is installed on the front side of the upper end of the base 1, and a material changing component is installed on the rear side of the base 1; the polishing device comprises a bottom shell 2 fixedly connected to the upper end of the base 1 and an outer cylinder 3 fixedly connected to the upper side of the bottom shell 2, the lower side of the surface of the outer cylinder 3 is a structure inclined inwardly, and a plurality of rectangular first connecting holes 5 are opened on the inclined part, and the outer sides of the first connecting holes 5 are respectively provided with closing plates 6 that can swing outwardly, and the inner ends of the closing plates 6 are respectively fixedly connected with electromagnetic plates 51, and a power supply component is installed on the upper side of the surface of the outer cylinder 3. Under normal conditions, the power supply component supplies power to the electromagnetic plate 51, so that the electromagnetic plate 51 generates magnetic attraction to the magnetic polishing needle, and a conductive protrusion 13 is installed in the middle of the outer cylinder 3, and the upper end of the conductive protrusion 13 is connected with a conductive rod for conducting electricity. The electrode sheet, the left and right sides of the opening of the outer cylinder 3 are respectively fixedly connected with a mounting box 49 with an inner end opening, the interior of the mounting box 49 is fixedly connected with an inner conductive sheet 22 and an outer conductive sheet 23 symmetrically arranged up and down, the two inner conductive sheets 22 on the left and right are respectively electrically connected to the two wires in the conductive protrusion 13, and the electrical connection between the inner conductive sheet 22 and the first wire 5718 in the conductive protrusion 13 adopts waterproof measures, the outer conductive sheet 23 is electrically connected to the electromagnetic plate 51, the upper side of the surface of the outer cylinder 3 is slidably connected with a conductive end at the corresponding position of the mounting box 49, an elastic component is installed between the lower side of the conductive end and the outer cylinder 3, when the conductive end moves downward, it can be connected with the inner conductive sheet 22 to power the conductive protrusion 13, and when the conductive end moves upward, it can be connected with the outer conductive sheet 23 to power the electromagnetic plate 51; the two conductive ends are respectively connected to the positive and negative poles of the power supply.

[0044] The material changing component includes a plurality of placement boxes 8 and a driving component for controlling the plurality of placement boxes 8 to be alternately placed in the outer cylinder 3 and driving the placement boxes 8 to rotate. The material changing component includes a plurality of placement boxes 8 and a driving component for controlling the plurality of placement boxes 8 to be alternately placed in the outer cylinder 3 and driving the placement boxes 8 to rotate. The inner bottom end of the placement box 8 is fixedly connected with an inner electromagnetic ring 9. A plurality of second connecting holes 10 are provided on the surface of the placement box 8. When the placement box 8 is placed in the outer cylinder 3, the electromagnetic plate 51 is powered off and the power supply component supplies power to the inner electromagnetic ring 9.

[0045] A mounting ring 16 is connected to the upper side of the placement box 8. When the placement box 8 is placed in the outer tube 3, the mounting ring 16 is placed at the opening of the outer tube 3. When the placement box 8 is placed inside the outer tube 3, the conductive protrusion 13 is connected to the inner electromagnetic ring 9 and the mounting ring 16 will press the conductive end to move downward and connect with the inner conductive sheet 22. When the conductive end is not pressed, the conductive end is disconnected from the inner conductive sheet 22 under the push of the elastic component and then connected to the outer conductive sheet 23. The lower side of the surface of the outer tube 3 is inclined inwardly and a plurality of rectangular first connecting holes 5 are provided in the inclined part. A plurality of second connecting holes 10 are provided on the surface of the placement box 8. The magnetic force of the inner electromagnetic ring 9 and the electromagnetic plate 51 is adjusted by adjusting the power supply component.

[0046] The first connecting hole 5 and the second connecting hole 10 are used to connect the bottom shell 2 with the placement box 8, and to reserve a moving channel for the magnetic polishing needle. The width of the first connecting hole 5 and the second connecting hole 10 is greater than the length of the polishing needle, so that the polishing needle can pass smoothly. The surface of the placement box 8 is set to an inclined structure inclined outward and can fit with the inclined part of the lower side of the outer cylinder 3, so that the placement box 8 can maintain a clearance fit with the outer cylinder 3 when rotating, so that the gap between the placement box 8 and the outer cylinder 3 is less than half of the diameter of the polishing needle body, which can not only prevent the wear-resistant casting from being thrown out of the placement box 8, but also ensure the rotation performance of the placement box 8. As an implementation, the interval between the two second connecting holes 10 is less than half of the length of the polishing needle, and the interval between the two first connecting holes 5 is less than half of the length of the polishing needle, which is convenient for the polishing needle to pass through the connecting holes. As an embodiment, the inner side wall of the placement box 8 between the two second communicating holes 10 is an arc convex inwardly, and the outer side wall of the outer tube 3 between the two first communicating holes 5 is an arc convex outwardly. The two arc-shaped settings can effectively prevent the polishing needle from getting stuck on the side wall between the communicating holes when moving inward or outward;

[0047] When the device is in use, multiple placement boxes 8 can be placed alternately in the outer cylinder 3 in sequence by controlling the material changing component, eliminating the step of manual placement by the operator, and can reduce the operating burden of the operator. When the placement box 8 has not yet been placed in the outer cylinder 3, the conductive end is connected to the outer conductive sheet 23 under the push of the elastic component, so that the electromagnetic plate 51 can be energized and generate magnetic force to attract the magnetic polishing needle to the surface of the electromagnetic plate 51. After the placement box 8 is placed in the outer cylinder 3, the conductive end is connected to the inner conductive sheet 22 to enable the conductive protrusion 13 to be powered. After the placement box 8 is placed in the outer cylinder 3, the inner electromagnetic ring 9 contacts the conductive protrusion 13, so that the inner electromagnetic ring 9 is powered to generate magnetic force, and the electromagnetic plate 51 loses its electromagnetic force, and the magnetic polishing needle will be attracted to the placement box 8 by the inner electromagnetic ring 9, and the placement box 8 is driven by the driving component to rotate rapidly. The centrifugal force and the magnetic attraction generated when the placement box 8 rotates can be adjusted according to the situation to control the size of its magnetic force. Alternatively, the polishing needle can be controlled to be closer or farther away from the rotation center through a gradual magnetic force, so that the magnetic polishing needle can continuously roll and impact on the surface of the wear-resistant casting to enhance the polishing effect, so that the wear-resistant casting can be fully and effectively polished. After the polishing is completed, when the material replacement component drives the placement box 8 to move upward, the inner electromagnetic ring 9 loses its magnetic force after the connection with the conductive protrusion 13 is disconnected. After the placement box 8 moves upward, the conductive end loses pressure and can move upward under the push of the elastic component to connect with the outer conductive sheet 23 so that the electromagnetic plate 51 can restore its magnetic force, attracting the magnetic polishing needle in the placement box 8, which will not remain on the wear-resistant casting. Then, the wear-resistant casting is moved out from the outer cylinder 3 under the drive of the driving component, and the operator does not need to manually clean the wear-resistant casting or replace the wear-resistant casting to be polished, which is convenient for the operator to use, effectively saves working time, and can fully improve work efficiency.

[0048] The driving component includes a control component for controlling the placement box 8 to be alternately placed in the outer cylinder 3 and a transmission component for controlling the rotation of the placement box 8. The control component includes a limit column 29 fixedly connected to the rear side of the surface of the base 1 and a guide cylinder 30 rotatably connected to the surface of the limit column 29. The surface of the guide cylinder 30 is rotatably connected with a linkage ring 24. The upper end of the linkage ring 24 is fixedly connected with a track plate 25 distributed in an annular shape equal to the number of the placement boxes 8. A driving rod 7 is fixedly connected to the middle of the placement box 8. The upper ends of the driving rods 7 are rotatably connected with a connecting frame 33. The lower end of the connecting frame 33 is vertically slidably connected to the track plate 25. The track plate 25 is used to improve the stability of the connecting frame 33 when it moves up and down, and when the linkage ring 24 rotates, the track plate 25 can drive multiple connecting frames 33 to rotate synchronously, thereby driving multiple placement boxes 8 to rotate synchronously. A limited groove is provided on the upper side of the surface of the limit column 29, and the other end of the connecting frame 33 is fixedly connected with a pin shaft 27, which is respectively slidably matched with the limit groove.

[0049] The limiting groove includes an annular groove 31 and a vertical groove 32 which is perpendicular to the annular groove 31 and connected to the annular groove 31 at the upper end. The pin shaft 27 can drive the placement box 8 to be placed on the outside of the outer cylinder 3 through the connecting frame 33 by sliding with the annular groove 31, and the lower pin shaft 27 cannot move downward due to the limiting of the annular groove 31, so that the placement box 8 stays on the upper part. When the connecting frame 33 is rotated to make the pin shaft 27 correspond to the vertical groove 32, the pin shaft 27 can slide downward along the vertical groove 32, and drive the placement box 8 to be placed on the inner side of the outer cylinder 3 through the connecting frame 33.

[0050] The upper end of the guide cylinder 30 is downwardly provided with a plurality of guide grooves 35, and a slope structure inclined outwardly is provided on one side in the same direction as the guide grooves 35, and the pin shafts 27 are respectively located between the guide grooves 35. When the guide cylinder 30 rotates, the pin shafts 27 can be pushed to move upward by the slope structure. When the placement box 8 is replaced, the guide cylinder 30 can be rotated to push the pin shaft 27 to move upward, thereby driving the placement box 8 to move upward and away from the outer cylinder 3. After the pin shaft 27 moves to the range of the annular groove 31, the linkage ring 24 is rotated to drive multiple placement boxes 8 to rotate synchronously, so that the new placement box 8 corresponds to the outer cylinder 3 and moves downward into the outer cylinder 3 for a new round of polishing operation.

[0051] Furthermore, in order to facilitate the operator to replace the placement box 8 and to facilitate the operator to polish multiple wear-resistant castings alternately, the wear-resistant castings can be placed in the placement box 8 respectively during use, and a guide ring 50 is fixedly connected to the lower end of the guide cylinder 30, and the guide ring 50 is coaxially arranged on the lower side of the linkage ring 24. The bottom of the linkage ring 24 is provided with arc-shaped slide grooves equal to the number of the placement box 8, and the arc-shaped slide grooves are coaxially fixedly connected with arc-shaped rods, and the surfaces of the arc-shaped rods are respectively sleeved with arc springs 41, and the interiors of the arc-shaped slide grooves are respectively slidably connected with mounting sliders 42, and the mounting sliders 42 are fixedly connected to one end of the arc spring 41, and the bottoms of the mounting sliders 42 are respectively fixedly connected to the driving plates 39, and the bottoms of the driving plates 39 are fixedly connected to the guide ring 50, and the guide ring 50 The circumferential surfaces of the connecting gears 36 are respectively fixedly connected, and a driving gear 38 is meshed on one side of the connecting gear 36. A first motor 37 is arranged on the upper side of the driving gear 38. The first motor 37 is fixedly connected to the base 1, and the output end of the first motor 37 is fixedly connected to the middle part of the driving gear 38. When in use, the guide ring 50 can be driven to rotate by controlling the first motor 37, and the guide cylinder 30 can be driven to rotate when the guide ring 50 rotates. Since the connecting frame 33 can only move vertically when the pin shaft 27 and the vertical groove 32 are slidably matched, the connecting ring 24 cannot rotate. Therefore, when the guide cylinder 30 rotates, the inclined surface outside the guide groove 35 can be used to push the pin shaft 27 to move upward, and the placement box 8 can be driven to move upward through the connecting frame 33. When the pin shaft 27 moves to the ring When the guide ring 50 is rotated, the installation slider 42 can be driven by the driving plate 39 to move in the arc groove and squeeze the arc spring 41, so that the arc spring 41 is in a state of accumulating force. When the pin shaft 27 moves to the range of the annular groove 31 under the push of the guide cylinder 30, the pin shaft 27 can move circumferentially in the annular groove 31, and then the linkage ring 24 can rotate under the push of the arc spring 41 and move on the track plate. 25 drives the connecting frame 33 to move, thereby driving the placement box 8 with the polished wear-resistant casting to be transferred, and driving the placement box 8 with the unpolished wear-resistant casting to move to the upper side of the outer cylinder 3 and the pin shaft 27 also corresponds to the vertical groove 32, and then moves downward to make the placement box 8 enter the outer cylinder 3 for polishing operation; the first motor 37 can use a stepping motor that can rotate intermittently, and the angle of each rotation can be set according to the number of placement boxes 8. For example, when the placement box 8 is provided with four annularly evenly distributed around the limit column, the first motor 37 can be set to rotate ninety degrees each time, ensuring that the first motor 37 can drive a placement box 8 to correspond to the upper and lower parts of the outer cylinder 3 each time it rotates, so as to facilitate the replacement of a new placement box 8 to enter the inner part of the outer cylinder 3.

[0052] The surfaces of the track plates 25 are vertically provided with connecting grooves 40, and the connecting slide blocks 26 that can move up and down are slidably connected inside the connecting grooves 40. The connecting slide blocks 26 are fixedly connected to the lower end of the connecting frame 33, and the upper end of the connecting slide blocks 26 is fixedly connected to a push spring 28, and the upper end of the push spring 28 is fixedly connected to the upper end of the connecting grooves 40. The push spring 28 can provide a thrust for the connecting frame 33 to move downward, so that the placement box 8 can be stably placed in the outer tube 3.

[0053] The transmission component includes a second motor 48 fixedly connected to the bottom of the base 1, the output end of the second motor 48 is fixedly connected to a vertically arranged connecting shaft 47, the connecting shaft 47 is rotatably connected to the base 1, and the upper end of the connecting shaft 47 is fixedly connected to a second connecting claw 46; the upper end of the driving rod 7 is fixedly connected to a second pulley 44, and the surface of the connecting frame 33 on the rear side of the second pulley 44 is rotatably connected to a first pulley 43, and the surfaces of the first pulley 43 and the second pulley 44 are respectively covered with a transmission belt, and the lower side of the first pulley 43 is respectively coaxially fixedly connected to a first connecting claw 45, when the placing box 8 is placed inside the outer cylinder 3 so that the first The connecting claw 45 is meshed with the second connecting claw 46. After the first connecting claw 45 is meshed with the second connecting claw 46, the power from the second motor 48 can be transmitted to the first pulley 43, and then the driving rod 7 is driven to rotate under the transmission of the first pulley 43, the second pulley 44 and the transmission belt, thereby driving the placement box 8 to rotate. When the connecting frame 33 moves upward, the first connecting claw 45 is disconnected from the second connecting claw 46, and the placement box 8 moving upward can stop rotating. When the new placement box 8 enters the outer tube 3, the new first connecting claw 45 can be meshed with the new second connecting claw 46, driving the new placement box 8 to rotate, which is convenient for users to use.

[0054] The conductive end includes two adjustment plates 17 which are respectively slidably connected to the two sides of the opening of the outer tube 3 and correspond to the installation box 49. The upper and lower ends of the adjustment plate 17 are respectively fixedly connected with the first conductive sheet 20 and the second conductive sheet 21. The first conductive sheet 20 and the second conductive sheet 21 located on the same adjustment plate 17 are mutually conductive through the conductor, and the two conductors are respectively connected to the positive and negative poles of the power supply; the first conductive sheet 20 is located on the upper side of the inner conductive sheet 22, and the second conductive sheet 21 is located on the lower side of the outer conductive sheet 23. When the adjustment plate 17 moves downward, the first conductive sheet 20 and the inner conductive sheet 21 are connected. 22 is connected, so that the conductive protrusion 13 is energized, and then after the inner electromagnetic ring 9 is connected to the conductive protrusion 13, the inner electromagnetic ring 9 can generate suction. When the adjustment plate 17 moves upward, the second conductive sheet 21 is connected to the outer conductive sheet 23. At this time, the first conductive sheet 20 is disconnected from the inner conductive sheet 22, and the conductive protrusion 13 loses power, and the electromagnetic plate 51 is energized to generate magnetic force, and the magnetic polishing needle is re-attracted. The adjustment plate 17 is used to cooperate with the mounting ring 16, so that the adjustment plate 17 is driven downward under the pressure of the mounting ring 16, and the adjustment plate 17 is driven upward under the push of the elastic component.

[0055] As a connection method between the power supply and the electromagnetic plate 51 and the inner electromagnetic ring 9, the present invention discloses an embodiment, specifically, first, a conductive block is installed on the adjustment plate 17, and the conductive block is electrically connected to the first conductive sheet 20 and the second conductive sheet 21 at the upper and lower ends respectively, and the two conductive blocks at the two ends of the outer cylinder 3 are respectively connected to the positive and negative poles of the power supply. The connection of the inner electromagnetic ring 9 is that the inner conductive sheet 22 is electrically connected to the first wire 57, and the conductive protrusion 13 is composed of two parts, namely, the protrusion base 52 at the lower end and the protrusion rotating column 53 at the upper end of the protrusion base 52. The upper end of the protrusion base 52 is provided with a protrusion groove 54, and the lower end surface of the protrusion rotating column 53 is rotatably fitted in the protrusion groove 54, and the lower end surface of the protrusion rotating column 53 is spaced from the protrusion groove 54. The first conductive slip ring 55 and the second conductive slip ring 56 are spaced from the inside to the outside at the center of the bottom of the protrusion groove 54. The first conductive slip ring 55 and the second conductive slip ring 56 are coaxial, and the two first wires 57 are respectively connected to the first conductive slip ring 55 and the second conductive slip ring 56. On the slip ring 55 and the second conductive slip ring 56, a first brush 58 matched with the first conductive slip ring 55 and a second brush 59 matched with the second conductive slip ring 56 are fixed at the lower end of the protruding rod rotating column 53, a first conductive lower pressure ring 60 and a second conductive lower pressure ring 61 are arranged in sequence from inside to outside on the upper end surface of the protruding rod rotating column 53, and a first conductive upper pressure ring 62 and a second conductive upper pressure ring 63 are fixed in sequence from inside to outside at the lower end of the inner electromagnetic ring 9, the first conductive upper pressure ring 62 and the first conductive lower pressure ring 60 correspond to each other, the second conductive upper pressure ring 63 and the second conductive lower pressure ring 61 correspond to each other, and the above-mentioned pressure rings are all sheet-shaped annular structures. The first brush 58 is connected to the first conductive lower pressure ring 60 through the second wire 64, and the second brush 59 is connected to the second conductive lower pressure ring 61 through the third wire 65. When the placement box 8 moves downward into the outer tube 3, the adjustment plate 17 moves downward so that the first conductive sheet 20 is connected to the inner conductive sheet 22, and the inner electromagnetic ring 9 is pressed on the conductive protruding rod 13, so that the first conductive upper pressure ring 62 at the lower end of the inner electromagnetic ring is pressed and electrically connected with the first conductive lower pressure ring 60 on the conductive protruding rod, and the second conductive upper pressure ring 63 is pressed and electrically connected with the second conductive lower pressure ring 61;

[0056] The inner conductive sheet 22 is connected to the first wire 57, and the two first wires 57 are respectively connected to the first conductive slip ring 55 and the second conductive slip ring 56. The first conductive slip ring 55 is connected to the first brush 58, and the second conductive slip ring 56 is connected to the second brush 59. The first brush 58 is connected to the first conductive lower pressure ring 60 through the second wire 64, and the second brush 59 is connected to the second conductive lower pressure ring 61 through the third wire 65. The first conductive lower pressure ring 60 is connected to the first conductive upper pressure ring 62, and the second conductive lower pressure ring 61 is connected to the second conductive upper pressure ring 63. The first conductive upper pressure ring 62 and the second conductive upper pressure ring 63 are respectively connected to the two conductive ends of the inner electromagnetic ring 9. Through the above connection, the power supply can supply power to the inner electromagnetic ring 9; the convex rod rotating column 53 of the conductive convex rod 17 is rotatably connected to the upper end of the convex rod base 52, and the two are electrically connected through the brushes and the slip rings. Therefore, when the inner electromagnetic ring is pressed on the convex rod rotating column 53 to drive it to rotate, it does not affect the power supply to the inner electromagnetic ring.

[0057] When the external electromagnetic switch is powered, the placement box 8 moves upward, and the mounting ring 16 no longer presses the adjustment plate 17. The adjustment plate 17 moves upward under the action of the second reset spring 9, so that the second conductive sheet 21 is connected to the external conductive sheet 23. The two internal conductive sheets 23 are respectively electrically connected to the two conductive ends of the electromagnetic plate 51. At this time, the power supply supplies power to the electromagnetic plate 51, and the electromagnetic plate 51 generates magnetic force; the conductive protrusion (13) moves upward and resets so that the pressure plate (12) no longer presses the swing plate (11), and the closing plate (6) swings outward and resets. When the lower end of the swing plate 11 presses against the surface of the pressure plate 12 again, the closing plate 6 stops swinging.

[0058] The elastic component includes a second return spring 19, which provides an upward returning driving force for the adjustment plate 17. The inner ends of the adjustment plates 17 are fixedly connected with adjustment sliders. The surfaces of the outer cylinder 3 corresponding to the adjustment sliders are respectively provided with vertically arranged adjustment grooves. The adjustment sliders are respectively slidably connected with the adjustment grooves. The second return spring 19 is located at the lower side of the adjustment slider and the upper and lower ends of the second return spring 19 are respectively fixedly connected with the adjustment slider and the inner wall of the adjustment groove, so as to provide stability for the compression of the second return spring 19.

[0059] The outer sides of the first connecting holes 5 are respectively provided with closing plates 6, which are used to prevent the magnetic polishing needle from being thrown out of the outer cylinder 3 through the first connecting hole 5 under the action of the external centrifugal force when the placing box 8 is placed in the outer cylinder 3 and the wear-resistant casting is polished by the magnetic polishing needle. The first connecting hole 5 is closed by the closing plate 6, thereby reducing the polishing space, which can improve the contact effect and impact probability between the magnetic polishing needle and the wear-resistant casting, and further improve the polishing effect on the wear-resistant casting. The bottom of the closing plate 6 is respectively fixedly connected with a swing plate 11, and the middle part of the swing plate 11 is hinged to the bottom of the outer cylinder 3. The hinge axis of the swing plate 11 and the bottom of the outer cylinder 3 is a damping shaft, so that the swing plate 11 can slowly swing outward, providing time for the second conductive sheet 21 to connect with the outer conductive sheet 23, so that the electromagnetic plate 51 can absorb all the magnetic polishing needles before the swing plate 11 is reset to the outside, and after the swing plate 11 is swung outward, it can prevent a new placing box 8 from being placed. The conductive protrusion 13 is placed in the outer cylinder 3 and touches the magnetic polishing needle; the conductive protrusion 13 is vertically slidably connected to the bottom of the outer cylinder 3, and a circular pressure plate 12 is fixedly connected to the lower side of the surface of the conductive protrusion 13. The outer sides of the pressure plate 12 are respectively placed on the upper sides of the inner ends of multiple swing plates 11. When the conductive protrusion 13 moves downward, the inner end of the swing plate 11 can be pressed downward by the pressure plate 12, so that the outer end of the swing plate 11 swings inward and drives the closing plate 6 to engage with the corresponding first connecting hole 5 respectively. When the electromagnetic plate 51 generates magnetic force, it can adsorb the magnetic polishing needle; the bottom of the conductive protrusion 13 is slidably connected to a vertically arranged stabilizing shaft 14, and the bottom of the stabilizing shaft 14 is fixedly connected to the inner wall of the bottom shell 2. The surface of the stabilizing shaft 14 is sleeved with a first reset spring 15, and the first reset spring 15 is located on the lower side of the conductive protrusion 13. The first reset spring 15 is used to push the conductive protrusion 13 to move upward and reset, and to support the conductive protrusion 13, which is convenient for users to use.

[0060] The present invention also provides a casting surface polishing method, comprising the following steps:

[0061] Step 1: Place the wear-resistant castings that need to be polished into the placement box 8 one by one, start the first motor 37 to drive the guide cylinder 30 to rotate so that one of the placement boxes 8 is placed into the outer cylinder 3, the mounting ring 16 presses the adjustment plate 17 to move downward so that the second conductive sheet 21 is disconnected from the outer conductive sheet 23, the first conductive sheet 20 is connected to the inner conductive sheet 22, the electromagnetic plate 51 loses power, the inner electromagnetic ring 9 is connected to the conductive protruding rod 13 so that the inner electromagnetic ring 9 is energized, and the inner electromagnetic ring 9 generates magnetic force to adsorb the magnetic polishing needle into the placement box 8;

[0062] Step 2: The placement box 8 is pressed downward to push the conductive protruding rod 13 downward, and the swing plate 11 is pressed to swing inward by the pressing plate 12, so as to drive the closing plate 6 to engage with the first connecting hole 5;

[0063] Step 3: Start the second motor 48, and drive the placement box 8 to rotate rapidly through the driving rod 7. Under the dual effects of centrifugal force and magnetic force generated when the placement box 8 rotates rapidly, the magnetic polishing needle is driven to roll rapidly in the placement box 8 and impact the wear-resistant casting, thereby quickly polishing the wear-resistant casting;

[0064] Step 4: Control the first motor 37 to drive the guide cylinder 30 to rotate again to move the placement box 8 in the outer cylinder 3 out. During the process of moving the placement box 8 out, the inner electromagnetic ring 9 is disconnected from the conductive protruding rod 13, the inner electromagnetic ring 9 loses power, and the conductive protruding rod 13 moves upward to reset so that the pressure plate 12 no longer presses the swing plate 11. The closing plate 6 swings outward to reset under the action of gravity, and the mounting ring 16 no longer presses the adjustment plate 17. The adjustment plate 17 resets upward after losing pressure, so that the second conductive sheet 21 is connected to the outer conductive sheet 23, and the electromagnetic plate 51 is energized to generate magnetic force to re-attract the internal magnetic polishing needle;

[0065] Step 5: While the first motor 37 drives the guide cylinder 30 to rotate and remove the polished placement box 8, a new placement box 8 enters the outer cylinder 3 for polishing operation;

[0066] Step 6: Remove the wear-resistant casting from the placement box 8.

[0067] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A casting surface polishing device, comprising a base (1) and a magnetic polishing needle, characterized in that: A polishing device is installed on the front side of the upper end of the base (1), and a material changing component is installed on the rear side of the base (1); The polishing device comprises a bottom shell (2) fixedly connected to the upper end of a base (1) and an outer cylinder (3) fixedly connected to the upper side of the bottom shell (2); the lower side of the surface of the outer cylinder (3) is in an inwardly inclined structure and a plurality of rectangular first communication holes (5) are provided in the inclined portion; the outer sides of the first communication holes (5) are respectively provided with closing plates (6) capable of swinging outward; the inner ends of the closing plates (6) are respectively fixedly connected with electromagnetic plates (51); a power supply component is installed on the upper side of the surface of the outer cylinder (3); under normal conditions, the power supply component supplies power to the electromagnetic plate (51), so that the electromagnetic plate (51) generates magnetic attraction to the magnetic polishing needle; The material replacement component comprises a plurality of placement boxes (8) and a driving component for controlling the plurality of placement boxes (8) to be alternately placed in the outer cylinder (3) and driving the placement boxes (8) to rotate; the inner bottom end of the placement box (8) is fixedly connected to an inner electromagnetic ring (9); a plurality of second communication holes (10) are provided on the surface of the placement box (8); when the placement box (8) is placed in the outer cylinder (3), a structure is formed in which the electromagnetic plate (51) is powered off and the power supply component supplies power to the inner electromagnetic ring (9).

2. A casting surface polishing device as claimed in claim 1, characterized in that: The driving component comprises a control component for controlling the placement boxes (8) to be alternately placed in the outer cylinder (3) and a transmission component for controlling the rotation of the placement boxes (8), the control component comprises a limit column (29) fixedly connected to the rear side of the surface of the base (1) and a guide cylinder (30) rotatably connected to the surface of the limit column (29), the surface of the guide cylinder (30) is rotatably connected with a linkage ring (24), the upper end of the linkage ring (24) is fixedly connected with track plates (25) distributed in an annular manner and equal in number to the placement boxes (8), the middle part of the placement box (8) is respectively fixedly connected with a driving rod (7), the upper end of the driving rod (7) is respectively rotatably connected with a connecting frame (33), the lower end of the connecting frame (33) is vertically slidably connected with the track plate (25), the upper side of the surface of the limit column (29) is provided with a limited motion groove, the other end of the connecting frame (33) is respectively fixedly connected with a pin shaft (27), and the pin shaft (27) is respectively slidably matched with the limited motion groove; The limiting groove comprises an annular groove (31) and a vertical groove (32) which is arranged perpendicular to the annular groove (31) and connected to the annular groove (31) at its upper end. The pin shaft (27) can drive the placement box (8) to be placed outside the outer cylinder (3) through the connecting frame (33) by slidingly cooperating with the annular groove (31). When the connecting frame (33) is rotated so that the pin shaft (27) corresponds to the vertical groove (32), the pin shaft (27) can slide downward along the vertical groove (32) and drive the placement box (8) to be placed inside the outer cylinder (3) through the connecting frame (33).

3. A casting surface polishing device as claimed in claim 2, characterized in that: The upper end of the guide cylinder (30) is provided with a plurality of guide grooves (35) extending downwardly, and a slope structure inclined outwardly is provided on one side of the guide grooves (35) in the same direction, and the pin shafts (27) are respectively located between the guide grooves (35). When the guide cylinder (30) rotates, the pin shafts (27) can be pushed to move upwards by the slope structure.

4. A casting surface polishing device as claimed in claim 3, characterized in that: The lower end of the guide cylinder (30) is fixedly connected to a guide ring (50), the guide ring (50) is coaxially arranged on the lower side of the linkage ring (24), the bottom of the linkage ring (24) is provided with arc-shaped sliding grooves equal in number to the placement box (8), the arc-shaped sliding grooves are coaxially fixedly connected with arc-shaped rods, the surfaces of the arc-shaped rods are respectively sleeved with arc-shaped springs (41), the arc-shaped sliding grooves are respectively slidably connected with mounting slide blocks (42), the mounting slide blocks (42) are fixedly connected to one end of the arc-shaped spring (41), and the mounting slide blocks The bottom of the drive plate (39) is fixedly connected to the bottom of the drive plate (39), the bottom of the drive plate (39) is fixedly connected to the guide ring (50), the circumferential surface of the guide ring (50) is fixedly connected to the linkage gear (36), one side of the linkage gear (36) is meshed with a driving gear (38), a first motor (37) is arranged on the upper side of the driving gear (38), the first motor (37) is fixedly connected to the base (1), and the output end of the first motor (37) is fixedly connected to the middle of the driving gear (38).

5. A casting surface polishing device as claimed in claim 2, characterized in that: The surface of the track plate (25) is vertically provided with connecting grooves (40), and a connecting slider (26) that can move up and down is slidably connected inside the connecting groove (40), and the connecting slider (26) is fixedly connected to the lower end of the connecting frame (33), and the upper end of the connecting slider (26) is fixedly connected to a push spring (28), and the upper end of the push spring (28) is fixedly connected to the upper end of the connecting groove (40).

6. A casting surface polishing device as claimed in claim 2, characterized in that: The transmission component comprises a second motor (48) fixedly connected to the bottom of the base (1); the output end of the second motor (48) is fixedly connected to a vertically arranged connecting shaft (47); the connecting shaft (47) is rotatably connected to the base (1); the upper end of the connecting shaft (47) is fixedly connected to a second connecting claw (46); the upper end of the driving rod (7) is fixedly connected to a second pulley (44); the surface of the connecting frame (33) on the rear side of the second pulley (44) is rotatably connected to a first pulley (43); the surfaces of the first pulley (43) and the second pulley (44) are respectively covered with a transmission belt; the lower side of the first pulley (43) is respectively coaxially fixedly connected to a first connecting claw (45); when the placement box (8) is placed inside the outer cylinder (3), the first connecting claw (45) is meshed with the second connecting claw (46).

7. A casting surface polishing device as claimed in claim 1, characterized in that: The power supply component comprises a conductive protrusion (13) installed in the middle of the inner outer cylinder (3); the left and right sides of the opening of the outer cylinder (3) are respectively fixedly connected with a mounting box (49) with an inner end opening; the interior of the mounting box (49) is fixedly connected with an inner conductive sheet (22) and an outer conductive sheet (23) symmetrically arranged up and down; the inner conductive sheet (22) is electrically connected to the conductive protrusion (13); the outer conductive sheet (23) is electrically connected to the electromagnetic plate (51); the upper side of the surface of the outer cylinder (3) is slidably connected to a conductive end at a corresponding position of the mounting box (49); an elastic component is installed between the lower side of the conductive end and the outer cylinder (3); when the conductive end moves downward, it can be connected with the inner conductive sheet (22) to supply power to the conductive protrusion (13); The upper side of the placement box (8) is connected with a mounting ring (16). When the placement box (8) is placed in the outer tube (3), the mounting ring (16) is placed at the opening of the outer tube (3). When the placement box (8) is placed in the inner part of the outer tube (3), the conductive protruding rod (13) is connected with the inner electromagnetic ring (9) and the mounting ring (16) presses the conductive end to move downward and connect with the inner conductive sheet (22). When the conductive end is not pressed, the conductive end is pushed by the elastic component to disconnect from the inner conductive sheet (22) and then connected with the outer conductive sheet (23). The conductive end comprises two adjustment plates (17) which are respectively slidably connected to the two sides of the opening of the outer cylinder (3) and correspond to the installation box (49); the upper and lower ends of the adjustment plate (17) are respectively fixedly connected with a first conductive sheet (20) and a second conductive sheet (21); the first conductive sheet (20) is located on the upper side of the inner conductive sheet (22), and the second conductive sheet (21) is located on the lower side of the outer conductive sheet (23); when the adjustment plate (17) moves downward, the first conductive sheet (20) is connected to the inner conductive sheet (22); when the adjustment plate (17) moves upward, the second conductive sheet (21) is connected to the outer conductive sheet (23).

8. A casting surface polishing device as claimed in claim 7, characterized in that: The elastic component includes a second return spring (19), the inner ends of the adjustment plates (17) are respectively fixedly connected with adjustment sliders, the surfaces of the outer cylinders (3) corresponding to the adjustment sliders are respectively provided with vertically arranged adjustment slots, the adjustment sliders are respectively slidably connected with the adjustment slots, the second return spring (19) is located at the lower side of the adjustment slider, and the upper and lower ends of the second return spring (19) are respectively fixedly connected with the adjustment slider and the inner wall of the adjustment slot.

9. A casting surface polishing device as claimed in claim 1, characterized in that: The bottom of the closing plate (6) is fixedly connected with a swing plate (11), the middle of the swing plate (11) is hinged with the bottom of the outer cylinder (3), the conductive protrusion (13) is vertically slidably connected to the bottom of the outer cylinder (3), the lower side of the surface of the conductive protrusion (13) is fixedly connected with a circular pressing plate (12), the outer side of the pressing plate (12) is respectively placed on the upper side of the inner ends of the plurality of swing plates (11), when the conductive protrusion (13) moves downward, the inner end of the swing plate (11) can be pressed downward by the pressing plate (12), so that the outer end of the swing plate (11) swings inward and drives the closing plate (6) to engage with the corresponding first connecting hole (5); the bottom of the conductive protrusion (13) is slidably connected with a vertically arranged stabilizing shaft (14), the bottom of the stabilizing shaft (14) is fixedly connected to the inner wall of the bottom shell (2), the surface of the stabilizing shaft (14) is sleeved with a first return spring (15), and the first return spring (15) is located on the lower side of the conductive protrusion (13).

10. A method for polishing a casting surface, characterized in that: The casting surface polishing device according to any one of claims 1 to 6 comprises the following steps: Step 1: Place the wear-resistant castings to be polished into the placement box (8) one by one, start the first motor (37) to drive the guide cylinder (30) to rotate so that one of the placement boxes (8) is placed into the outer cylinder (3), the mounting ring (16) presses the adjustment plate (17) to move downward so that the second conductive sheet (21) is disconnected from the outer conductive sheet (23), the first conductive sheet (20) is connected to the inner conductive sheet (22), the electromagnetic plate (51) loses power, the inner electromagnetic ring (9) is connected to the conductive protruding rod (13) so that the inner electromagnetic ring (9) is energized, and the inner electromagnetic ring (9) generates magnetic force to adsorb the magnetic polishing needle into the placement box (8); Step 2: The placement box (8) is pressed downward to push the conductive protruding rod (13) downward, and the swing plate (11) is pressed inwardly by the pressing plate (12), thereby driving the closing plate (6) to engage with the first connecting hole (5); Step 3: Start the second motor (48), and drive the placement box (8) to rotate rapidly through the driving rod (7). Under the dual effects of centrifugal force and magnetic force generated when the placement box (8) rotates rapidly, the magnetic polishing needle is driven to roll rapidly in the placement box (8) and impact the wear-resistant casting, thereby quickly polishing the wear-resistant casting. At this time, the magnetic size of the inner electromagnetic ring (9) can be adjusted to adapt the polishing action; Step 4: Control the first motor (37) to drive the guide cylinder (30) to rotate again so that the placement box (8) in the outer cylinder (3) is moved out. During the process of moving the placement box (8), the inner electromagnetic ring (9) is disconnected from the conductive protruding rod (13), the inner electromagnetic ring (9) loses power, and the conductive protruding rod (13) moves upward to reset so that the pressure plate (12) no longer presses the swing plate (11), the closing plate (6) swings outward to reset, the pressure plate (12) no longer presses the adjustment plate (17), and the adjustment plate (17) resets upward after losing pressure, so that the first conductive sheet (20) is connected to the outer conductive sheet (23), and the electromagnetic plate (51) is energized to generate magnetic force to re-attract the internal magnetic polishing needle; Step 5: When the first motor (37) drives the guide cylinder (30) to rotate and the polished placement box (8) is removed, a new placement box (8) enters the outer cylinder (3) for polishing operation; Step 6: Take out the wear-resistant casting in the placement box (8).

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