A precision polishing device for magnesium-aluminum alloy shell

Abstract

The application discloses a magnesium-aluminum alloy shell precision polishing device and relates to the technical field of metal processing.The magnesium-aluminum alloy shell precision polishing device comprises a servo motor and a grinding wheel, the output end of the servo motor is connected with a swing mechanism, the swing mechanism comprises a fixed seat and a swing seat, and the side wall centers of the fixed seat and the swing seat are both rotationally connected with transmission shafts.The knob is rotated to drive the half gears to rotate, the half gears are driven to rotate in opposite directions after being actuated, one of the half gears drives the swing seat to rotate, the swing seat drives the transmission shafts to adjust the axial positions, the U-shaped seat is swung, the worm always keeps the same axis as the transmission shafts on the swing seat, the worm is swung along with the swing of the transmission shafts to adjust the position of the grinding wheel, the grinding wheel is swung along the track of the arc, the arc surface of the grinding wheel is swung to polish, the fit degree during the polishing of the alloy shell surface is improved, and thus the polishing smoothness of the arc surface shell is improved.

Description

Technical Field

[0001] This invention relates to the field of metal processing technology, specifically to a precision grinding device for magnesium-aluminum alloy shells. Background Technology

[0002] The low density of magnesium and aluminum alloys improves their specific performance. Magnesium-aluminum alloys have excellent strength, rigidity, and dimensional stability. Metal casings made of magnesium-aluminum alloys have many advantages: impact resistance and high strength and toughness; better thermal conductivity and electromagnetic radiation protection than engineering plastics; high specific strength: their hardness is several times that of traditional plastic casings, but their weight is only one-third of the latter; excellent appearance and tactile texture, and easy to color; magnesium-aluminum alloys are recyclable materials, which can minimize waste generation.

[0003] For example, the patent publication number CN220113013U, "A Grinding Device for the Edges and Corners of an Aluminum Alloy Shell", includes a pad set on the ground, a conveyor belt on the pad, and two grinding mechanisms symmetrically arranged on both sides of the conveyor belt. The two grinding mechanisms are used to independently grind the edges and corners of the aluminum alloy shell on both sides of the conveyor belt. The grinding mechanism includes a reciprocating lifting component and a grinding component. The reciprocating lifting component is set on the pad and the grinding component is provided on it so that the grinding component performs grinding operations on the edges and corners of the aluminum alloy shell in a linear lifting manner. One of the reciprocating lifting components is provided with an elastic pressing component for elastically pressing down on the aluminum alloy shell on the conveyor belt.

[0004] The edges of the metal casing of the equipment are all rounded, so the surface of the magnesium-aluminum alloy casing is not completely flat. However, in the existing technology, the grinding wheel and motor of the grinding device for the magnesium-aluminum alloy casing are generally directly connected, and the grinding angle and range of the grinding wheel are uncontrollable. When grinding these casings with uneven surfaces, it is difficult to guarantee the grinding effect of the curved surface, which affects the overall smoothness of the casing. Summary of the Invention

[0005] The purpose of this invention is to provide a precision grinding device for magnesium-aluminum alloy shells. By rotating a knob, the half-gears are driven to rotate. After the half-gears are turned, they rotate in opposite directions. One half-gear drives the swing seat to rotate together, so that the swing seat drives the transmission shaft to adjust the axis position, causing the U-shaped seat to swing accordingly. Since the worm gear always stays on the same axis as the transmission shaft on the swing seat, the worm gear adjusts the position of the grinding wheel with the swing of the transmission shaft, so that the grinding wheel swings along the arc trajectory, and performs grinding by swinging along the arc surface trajectory, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a precision grinding device for magnesium-aluminum alloy shells, comprising a servo motor and a grinding wheel. The output end of the servo motor is connected to a swing mechanism, which includes a fixed base and a swing base. A drive shaft is rotatably connected to the center of the side wall of both the fixed base and the swing base. A coupling connects the two drive shafts. Adjusting the angle of the two half-gears, since the fixed base is fixed to the base plate, when the two half-gears are turned and rotate in opposite directions, one half-gear drives the swing base to rotate together, causing the swing base to drive the drive shaft to adjust its axial position. Because the two drive shafts are connected by a coupling, when the axial direction of the drive shaft is adjusted, the servo motor can still achieve the desired adjustment. The transmission drives the U-shaped seat to swing. The bottom of the fixed seat is fixedly connected to a base plate, and the swing seat is slidably connected to the base plate. Both the fixed seat and the swing seat have half gears on their upper surfaces. The two half gears mesh with each other. The fixed seat is rotatably connected to the half gears, and the swing seat is fixedly connected to the half gears. The swing seat is connected to a translation mechanism via a transmission shaft. The transmission shaft drives the grinding wheel to rotate through the translation mechanism. The servo motor is started, causing the servo motor to drive the transmission shaft to rotate. Utilizing the linkage of the coupling, the two transmission shafts rotate together, ultimately causing the transmission shaft to drive the worm gear to rotate. The worm gear drives the parallel coupling assembly to rotate, and the parallel coupling assembly drives the grinding wheel to rotate, using the rotation of the grinding wheel to produce grinding.

[0007] Preferably, the translation mechanism includes a U-shaped seat and a worm gear. A limit block is fixedly connected to the bottom end of the U-shaped seat. An arc-shaped groove is formed on the surface of the base plate. The limit block is slidably connected to the arc-shaped groove. Both ends of the worm gear are slidably connected to the U-shaped seat. One end of the worm gear is fixedly connected to the transmission shaft, and the other end of the worm gear is fixedly connected to a parallel coupling assembly.

[0008] Preferably, the parallel connection assembly includes a first connecting turntable, a cross-shaped connecting slot seat, and a second connecting turntable. The adjacent sides of the first and second connecting turntables are provided with bars. The first and second connecting turntables are slidably connected to the cross-shaped connecting slot seat. The second connecting turntable is moved by a convex shaft. Since the second and first connecting turntables are connected by the cross-shaped connecting slot seat, the second and first connecting turntables do not rotate synchronously on the same axis, but rather on two parallel axes.

[0009] Preferably, a convex shaft is fixedly connected to the center of the side wall of the second rotating disc, and a smoothing block is rotatably connected to the outer side wall of the convex shaft. A limiting seat is slidably connected to the outer side wall of the smoothing block. A limiting seat is laterally arranged between the grinding wheel and the worm gear, and a smoothing block that can be translated is arranged on the limiting seat. When the smoothing block is smoothing in the limiting seat, it drives the grinding wheel to change the grinding position.

[0010] Preferably, an eccentric component is also provided on one side of the worm gear. The eccentric component includes a deflector disk and a worm wheel. A protrusion is fixedly connected to the center of the top of the worm wheel. The protrusion is rotatably connected to the deflector disk. An eccentric groove is formed along the periphery of the upper surface of the deflector disk. The rotation of the worm gear drives the worm wheel to rotate at a reduced speed, so that the worm wheel drives the deflector disk to rotate eccentrically through the protrusion disk. The eccentric groove formed on the outer periphery of the deflector disk rotates accordingly. The eccentric groove drives the Z-shaped rod to swing along the fixed point in the middle, so that the other end of the Z-shaped rod continuously reciprocates.

[0011] Preferably, a connecting rod assembly is provided between the smooth block and the eccentric component. The connecting rod assembly includes an ear seat and a Z-shaped rod, and the connecting rod is rotatably connected to the outer wall of the ear seat.

[0012] Preferably, one end of the Z-shaped rod is slidably connected to the inner wall of the eccentric groove, and the other end of the Z-shaped rod is rotatably connected to the connecting rod. Through the connection between the Z-shaped rod and the connecting rod, the smooth block is continuously pulled to slide back and forth, thereby expanding the grinding range of the grinding wheel.

[0013] Preferably, the bottom surfaces of the swing seat, U-shaped seat, Z-shaped rod, and limiting seat are fixed on the same cross-section, and the cross-section is slidably connected to the base plate. A carrier plate is provided on the bottom surfaces of the swing seat, U-shaped seat, Z-shaped rod, and limiting seat to support and position the swing seat, U-shaped seat, Z-shaped rod, and limiting seat.

[0014] Preferably, a handle is fixedly connected to the top of the base plate, and an anti-slip sleeve is fixedly connected to the outer side of the handle. Handles are provided on both sides of the surface of the base plate for hand operation.

[0015] Preferably, a knob is rotatably connected to the bottom end of the base plate, and the top end of the knob passes through the fixed seat and is rotatably connected to the half gear. A knob is set below the base plate, and the swing angle of the two sets of half gears can be adjusted by the knob.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. In this invention, rotating the knob drives the half gear to rotate. After the half gears are turned, they rotate in opposite directions. One of the half gears drives the swing seat to rotate together, so that the swing seat drives the transmission shaft to adjust the axis position, causing the U-shaped seat to swing accordingly. Since the worm always stays on the same axis as the transmission shaft on the swing seat, the worm adjusts the position of the grinding wheel with the swing of the transmission shaft, so that the grinding wheel swings along the arc trajectory. The arc trajectory of the grinding wheel swings to perform grinding, which improves the fit when grinding the alloy shell surface, thereby improving the smoothness of the arc shell.

[0018] 2. In this invention, the second rotating disk is moved by the convex shaft, and the second rotating disk and the first rotating disk are connected by the cross-shaped connecting slot seat. The second rotating disk and the first rotating disk rotate synchronously on two parallel axes, which avoids the movement of the smooth block from affecting the transmission of the worm gear to the eccentric groove. This allows the servo motor to still drive the grinding wheel to rotate for polishing when the grinding wheel moves within a certain range, thereby improving the processing range of the grinding wheel in the plane.

[0019] 3. In this invention, when the servo motor drives two sets of transmission shafts to rotate and drives the worm gear to rotate, the worm gear and worm wheel mesh with each other. The rotation of the worm gear drives the worm wheel to rotate at a reduced speed, so that the worm wheel drives the deflection disk to rotate eccentrically through the convex post. The eccentric groove set on the outer periphery of the deflection disk rotates accordingly. The eccentric groove drives the Z-shaped rod to swing along the fixed point in the middle, so that the other end of the Z-shaped rod swings back and forth continuously, realizing the effect of automatic movement of the grinding wheel, thereby expanding the grinding range of the grinding wheel. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a precision grinding device for magnesium-aluminum alloy shells according to the present invention. Figure 1 ;

[0021] Figure 2 This is a three-dimensional structural diagram of a precision grinding device for magnesium-aluminum alloy shells according to the present invention. Figure 2 ;

[0022] Figure 3 This is a schematic diagram of the bottom structure of the swing mechanism in a precision grinding device for magnesium-aluminum alloy shells according to the present invention.

[0023] Figure 4 This is a schematic diagram of the swing mechanism in a precision grinding device for magnesium-aluminum alloy shells according to the present invention.

[0024] Figure 5 This is a schematic diagram of the translation mechanism in a precision grinding device for magnesium-aluminum alloy shells according to the present invention.

[0025] Figure 6 This is a partial structural breakdown diagram of the translation mechanism in a precision grinding device for magnesium-aluminum alloy shells according to the present invention.

[0026] Figure 7 This is a partial structural breakdown diagram of the eccentric component in a precision grinding device for magnesium-aluminum alloy shells according to the present invention.

[0027] In the diagram: 1. Base plate; 11. Arc groove; 12. Handle; 2. Servo motor; 3. Swing mechanism; 31. Fixed seat; 32. Half gear; 33. Drive shaft; 34. Coupling; 35. Swing seat; 36. Knob; 4. Translation mechanism; 41. U-shaped seat; 410. Limit block; 42. Worm gear; 43. Horizontal coupling assembly; 431. First connecting turntable; 432. Cross connecting groove seat; 433. Second connecting turntable; 434. Convex shaft; 435. Smooth block; 44. Eccentric assembly; 441. Deflection disk; 442. Worm gear; 443. Convex column; 444. Eccentric groove; 45. Connecting rod assembly; 451. Ear seat; 452. Connecting rod; 453. Z-shaped rod; 46. Limit seat; 5. Grinding wheel. Detailed Implementation

[0028] 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.

[0029] Example 1

[0030] Reference Figure 1-7 As shown: A precision grinding device for magnesium-aluminum alloy shells includes a servo motor 2 and a grinding wheel 5. The output end of the servo motor 2 is connected to a swing mechanism 3. The swing mechanism 3 includes a fixed base 31 and a swing base 35. A transmission shaft 33 is rotatably connected to the center of the side wall of both the fixed base 31 and the swing base 35. A coupling 34 is connected between the two transmission shafts 33. A base plate 1 is fixedly connected to the bottom end of the fixed base 31. The swing base 35 is slidably connected to the base plate 1. Half gears 32 are provided on the upper surface of both the fixed base 31 and the swing base 35. The two half gears 32 mesh with each other. The fixed base 31 is rotatably connected to the half gears 32. The swing base 35 is fixedly connected to the half gears 32. The swing base 35 is connected to a translation mechanism 4 through the transmission shaft 33. The transmission shaft 33 drives the grinding wheel 5 to rotate through the translation mechanism 4.

[0031] In this embodiment, when polishing the magnesium-aluminum alloy shell, the entire device is lifted by the handle 12, and the grinding wheel 5 is aligned with the position to be polished. The servo motor 2 is started, causing the servo motor 2 to drive the transmission shaft 33 to rotate. Utilizing the linkage relationship of the coupling 34, the two transmission shafts 33 rotate together, ultimately causing the transmission shaft 33 to drive the worm gear 42 to rotate. The worm gear 42 drives the flat coupling assembly 43 to rotate, and the flat coupling assembly 43 drives the grinding wheel 5 to rotate. The rotation of the grinding wheel 5 generates a polishing effect on a specific location. When the surface of the magnesium-aluminum alloy shell is arc-shaped, the angles of the two half gears 32 are adjusted to make the polishing effect of the grinding wheel 5 smoother. Since the fixed seat 31 is fixed on the base plate 1, when... After the two half gears 32 are turned and rotate in opposite directions, one of the half gears 32 drives the swing seat 35 to rotate together, so that the swing seat 35 drives the transmission shaft 33 to adjust the axis position. Since the two transmission shafts 33 are connected by the coupling 34, when the transmission shaft 33 adjusts the axis direction, it can still achieve transmission through the servo motor 2 and drive the U-shaped seat 41 to swing accordingly. Since the worm 42 always stays on the same axis as the transmission shaft 33 on the swing seat 35, the worm 42 adjusts the position of the grinding wheel 5 with the swing of the transmission shaft 33, so that the grinding wheel 5 swings along the arc trajectory, so that the grinding wheel 5 can fully grind the magnesium-aluminum alloy surface of the arc shell and improve the smoothness of grinding the arc surface.

[0032] Example 2

[0033] according to Figure 1 , Figure 4 , Figure 6 and Figure 7 As shown, the translation mechanism 4 includes a U-shaped seat 41 and a worm gear 42. A limit block 410 is fixedly connected to the bottom end of the U-shaped seat 41. An arc-shaped groove 11 is formed on the surface of the base plate 1, and the limit block 410 is slidably connected to the arc-shaped groove 11. Both ends of the worm gear 42 are slidably connected to the U-shaped seat 41. One end of the worm gear 42 is fixedly connected to the transmission shaft 33, and the other end of the worm gear 42 is fixedly connected to a horizontal coupling assembly 43. The horizontal coupling assembly 43 includes a first connecting turntable 431, a cross-shaped connecting groove seat 432, and a second connecting turntable 433. Bars are provided on adjacent sides of both the first connecting turntable 431 and the second connecting turntable 433. Both the first connecting turntable 431 and the second connecting turntable 433 are slidably connected to the cross-shaped connecting groove seat 432.

[0034] The second turntable 433 has a convex shaft 434 fixedly connected to the center of its side wall. The outer side wall of the convex shaft 434 is rotatably connected to a smooth block 435. The outer side wall of the smooth block 435 is slidably connected to a limit seat 46.

[0035] An eccentric assembly 44 is also provided on one side of the worm gear 42. The eccentric assembly 44 includes a deflecting disk 441 and a worm wheel 442. A protrusion 443 is fixedly connected to the center of the top of the worm wheel 442. The protrusion 443 is rotatably connected to the deflecting disk 441. An eccentric groove 444 is formed along the periphery of the upper surface of the deflecting disk 441. A connecting rod assembly 45 is provided between the smooth block 435 and the eccentric assembly 44. The connecting rod assembly 45 includes a lug 451 and a Z-shaped rod 453. A connecting rod 452 is rotatably connected to the outer wall of the lug 451. One end of the Z-shaped rod 453 is slidably connected to the inner wall of the eccentric groove 444, and the other end of the Z-shaped rod 453 is rotatably connected to the connecting rod 452.

[0036] In this embodiment, the traditional grinding device grinds by rotating the grinding wheel 5, which has a relatively limited grinding area. Generally, the contact area between the grinding wheel 5 and the metal surface is limited, which affects the grinding efficiency of the entire surface of the shell. In order to enable the grinding wheel 5 to have more contact with the metal surface during grinding, a limiting seat 46 is provided laterally between the grinding wheel 5 and the worm gear 42. A smoothing block 435 that can translate is provided on the limiting seat 46. When the smoothing block 435 smooths in the limiting seat 46, it drives the grinding wheel 5 to change the grinding position. At the same time, when the smoothing block 435 moves, it drives the second rotating disk 433 to move through the convex shaft 434. Since the second rotating disk 433 and the first rotating disk 431 are connected by the cross-shaped connecting slot seat 432, the second rotating disk 433 and the first rotating disk 431 do not rotate synchronously on the same axis, but rather on two parallel axes. In other words, the translation of the smooth block 435 does not affect the transmission effect of the worm gear 42 on the eccentric groove 444, so that when the grinding wheel 5 moves within a certain range, the servo motor 2 can still drive the grinding wheel 5 to rotate for polishing. In order to automatically expand the grinding range of the grinding wheel 5 during the grinding process, the worm gear 42 and the worm wheel 442 mesh with each other. The rotation of the worm gear 42 drives the worm wheel 442 to rotate at a reduced speed, so that the worm wheel 442 drives the deflection disk 441 to rotate eccentrically through the protrusion 443. The eccentric groove 444 set on the outer periphery of the deflection disk 441 rotates accordingly. The eccentric groove 444 drives the Z-shaped rod 453 to swing along the fixed point in the middle, so that the other end of the Z-shaped rod 453 swings back and forth continuously. Through the connection between the Z-shaped rod 453 and the connecting rod 452, the smooth block 435 is continuously pulled to slide back and forth, thereby expanding the grinding range of the grinding wheel 5.

[0037] Example 3

[0038] according to Figure 2 , Figure 3 , Figure 4 and Figure 6As shown, the bottom surfaces of the swing seat 35, U-shaped seat 41, Z-shaped rod 453, and limiting seat 46 are fixed on the same cross-section, and the cross-section is slidably connected to the base plate 1. A handle 12 is fixedly connected to the top of the base plate 1, and an anti-slip sleeve is fixedly connected to the outer wall of the handle 12. A knob 36 is rotatably connected to the bottom of the base plate 1, and the top of the knob 36 passes through the fixed seat 31 and is rotatably connected to the half gear 32.

[0039] In this embodiment, in order to maintain the overall structural stability of the grinding wheel 5 during circular or translational motion, a carrier plate is provided on the bottom surface of the swing seat 35, U-shaped seat 41, Z-shaped rod 453 and limiting seat 46 to support and position the swing seat 35, U-shaped seat 41, Z-shaped rod 453 and limiting seat 46, so as to prevent the position of the grinding wheel 5 from shifting and maintain stability during the grinding process. Handles 12 are provided on both sides of the surface of the base plate 1 for hand operation. A knob 36 is provided below the base plate 1. The swing angle of the two sets of half gears 32 can be adjusted by the knob 36 to adjust the swing angle of the grinding wheel 5.

[0040] The usage and working principle of this device are as follows: First, hold the handle 12 to lift the entire device and align the grinding wheel 5 with the position to be ground. Start the servo motor 2, which will drive the transmission shaft 33 to rotate. Finally, the transmission shaft 33 will drive the worm gear 42 to rotate, which will drive the flat coupling assembly 43 to rotate, which will drive the grinding wheel 5 to rotate.

[0041] At the same time, the worm 42 and the worm wheel 442 mesh with each other. The rotation of the worm 42 drives the worm wheel 442 to rotate at a reduced speed, so that the worm wheel 442 drives the deflection disk 441 to rotate eccentrically through the protrusion 443. The eccentric groove 444 set on the outer periphery of the deflection disk 441 rotates accordingly. The eccentric groove 444 drives the Z-shaped rod 453 to swing along the central fixed point, so that the other end of the Z-shaped rod 453 swings back and forth continuously. Through the connection between the Z-shaped rod 453 and the connecting rod 452, the smooth block 435 is continuously pulled to slide back and forth, thereby expanding the grinding range of the grinding wheel 5.

[0042] Finally, rotate knob 36, which drives the half gear to rotate. One of the half gears 32 drives the swing seat 35 to rotate together, so that the swing seat 35 drives the transmission shaft 33 to adjust the axis position. Since the two transmission shafts 33 are connected by coupling 34, when the transmission shaft 33 adjusts the axis direction, it can still achieve transmission through servo motor 2 and drive the U-shaped seat 41 to swing accordingly. Since the worm 42 always stays on the same axis as the transmission shaft 33 on the swing seat 35, the worm 42 adjusts the position of the grinding wheel 5 with the swing of the transmission shaft 33, so that the grinding wheel 5 swings along the arc trajectory and adjusts the grinding direction.

[0043] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A precision grinding device for magnesium-aluminum alloy shells, comprising a servo motor (2) and a grinding wheel (5), characterized in that: The output end of the servo motor (2) is connected to a swing mechanism (3). The swing mechanism (3) includes a fixed seat (31) and a swing seat (35). The center of the side wall of the fixed seat (31) and the swing seat (35) are rotatably connected to a transmission shaft (33). A coupling (34) is connected between the two transmission shafts (33). The bottom end of the fixed seat (31) is fixedly connected to a base plate (1). The swing seat (35) is slidably connected to the base plate (1). The upper surface of the fixed seat (31) and the swing seat (35) are provided with half gears (32). The two half gears (32) mesh with each other. The fixed seat (31) is rotatably connected to the half gears (32). The swing seat (35) is fixedly connected to the half gears (32). The swing seat (35) is connected to a translation mechanism (4) through the transmission shaft (33). The transmission shaft (33) drives the grinding wheel (5) to rotate through the translation mechanism (4). The translation mechanism (4) includes a U-shaped seat (41) and a worm (42). The bottom end of the U-shaped seat (41) is fixedly connected to a limiting block (410). An arc groove (11) is opened on the surface of the base plate (1). The limiting block (410) is slidably connected to the arc groove (11). The two ends of the worm (42) are slidably connected to the U-shaped seat (41) respectively. One end of the worm (42) is fixedly connected to the transmission shaft (33). The other end of the worm (42) is fixedly connected to a parallel coupling assembly (43). The flat connection assembly (43) includes a first connecting turntable (431), a cross connecting slot seat (432), and a second connecting turntable (433). The adjacent sides of the first connecting turntable (431) and the second connecting turntable (433) are provided with bars. The first connecting turntable (431) and the second connecting turntable (433) are slidably connected to the cross connecting slot seat (432). A convex shaft (434) is fixedly connected to the center of the side wall of the second rotating disk (433), and a smooth block (435) is rotatably connected to the outer side wall of the convex shaft (434), and a limit seat (46) is slidably connected to the outer side wall of the smooth block (435). An eccentric assembly (44) is also provided on one side of the worm (42). The eccentric assembly (44) includes a deflection disk (441) and a worm wheel (442). A protrusion (443) is fixedly connected to the top center of the worm wheel (442). The protrusion (443) is rotatably connected to the deflection disk (441). An eccentric groove (444) is provided along the periphery on the upper surface of the deflection disk (441). A connecting rod assembly (45) is provided between the smooth block (435) and the eccentric component (44). The connecting rod assembly (45) includes an ear seat (451) and a Z-shaped rod (453). The outer side wall of the ear seat (451) is rotatably connected to the connecting rod (452). The bottom surfaces of the swing seat (35), U-shaped seat (41), Z-shaped rod (453) and limiting seat (46) are fixed on the same cross surface, and the cross surface is slidably connected to the base plate (1).

2. The precision grinding device for magnesium-aluminum alloy shells according to claim 1, characterized in that: One end of the Z-shaped rod (453) is slidably connected to the inner wall of the eccentric groove (444), and the other end of the Z-shaped rod (453) is rotatably connected to the connecting rod (452).

3. The precision grinding device for magnesium-aluminum alloy shells according to claim 1, characterized in that: A handle (12) is fixedly connected to the top of the base plate (1), and an anti-slip sleeve is fixedly connected to the outer side wall of the handle (12).

4. The precision grinding device for magnesium-aluminum alloy shells according to claim 1, characterized in that: The bottom end of the base plate (1) is rotatably connected to a knob (36), the top of the knob (36) passes through the fixed seat (31) and is rotatably connected to the half gear (32).

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