Preparation method of magnesium alloy engine cylinder block

Abstract

The invention belongs to the technical field of engine cylinder block preparation, and particularly relates to a magnesium alloy engine cylinder block preparation method.The drying equipment comprises a drying box, a supporting component is arranged in the drying box, a centering component is arranged on the inner wall of one side of the drying box, stretching components are symmetrically arranged on one side of the centering component, and a supporting plate is fixedly arranged on each stretching component; a motor is fixedly arranged on one side of the supporting plate, a gear rod is rotationally connected into the supporting plate, a gear column is rotationally arranged on the gear rod, and the gear rod is meshed with the gear column; an engine cylinder body is fixed through an external expansion part, the surfaces of the two sides of the engine cylinder body are not shielded by rotating sleeves, meanwhile, a second rotating column rotates, under the guiding effect of a guiding groove, a guiding rod moves in a reciprocating mode, and therefore air in a piston box is output through an air outlet pipe through a piston rod; air is blown out through the air spraying pipe, then air is blown to the two sides of the engine cylinder body, and a high-quality surface foundation is provided for the subsequent coating procedure.

Description

Technical Field

[0001] The present invention relates to the technical field of engine cylinder preparation, in particular to a method for preparing a magnesium alloy engine cylinder. Background Art

[0002] The magnesium alloy engine cylinder preparation equipment is a comprehensive manufacturing system, which mainly includes magnesium alloy melting and refining equipment, casting and molding equipment, sandblasting equipment, cleaning equipment, drying equipment and coating equipment. Among them, the drying equipment is used to quickly dry the cleaned magnesium alloy engine cylinder, remove residual moisture inside and on the surface of the cylinder, prevent potential problems such as metal oxidation, rust and electrical component short circuit caused by moisture, and provide a high-quality surface foundation for its subsequent coating process.

[0003] When using existing drying equipment, the engine cylinder is first clamped and then rotated to pour out the residual water inside. At the same time, high-temperature air is blown onto the surface of the engine cylinder through an air gun in the drying box, which not only removes the water droplets but also evaporates the water. The engine cylinder is dried by the combination of blowing and rotation.

[0004] There are still some problems in the actual application of the above solution. When drying the surface of the engine cylinder, since the engine cylinder needs to rotate during the drying process, its two sides are clamped, so that the two sides of the engine cylinder are blocked by the clamping device, resulting in the moisture on both sides of the engine cylinder being difficult to be effectively evaporated or taken away, forming a drying blind spot, resulting in incomplete drying of the engine cylinder side, and potential problems such as metal oxidation, rust and electrical component short circuit caused by moisture. In addition, the surface that is not completely dried will form an isolation layer with the paint layer in the subsequent coating process, resulting in reduced adhesion of the coating and easy bubbling or peeling. At the same time, the gas generated by water evaporation may cause surface defects such as pinholes, further exacerbating the risk of substandard coating quality, and ultimately affecting the overall corrosion resistance, appearance quality and assembly reliability of the engine, increasing rework costs and market complaint risks.

[0005] To this end, the present invention provides a method for preparing a magnesium alloy engine cylinder block. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a method for preparing a magnesium alloy engine cylinder block according to the present invention includes raw material preparation, smelting, casting, heat treatment, machining, sandblasting, cleaning, drying and coating treatment, characterized in that the drying includes the following steps:

[0008] Step 1: Move the cleaned engine block into the drying oven and place it on the support component;

[0009] Step 2: Start the extension component so that the expansion component and a hole in the engine block are in the same vertical line, then start the motor to drive the gear rod to rotate counterclockwise, and drive the expansion component to rotate through the gear column;

[0010] Step 3: During the rotation of the gear column, the rotating plate contacts the inner wall of one side of the abutment groove 2, and the other side of the rotating plate is pushed to abut against the inner wall of the abutment groove 1, driving the rotating sleeve push plate to rotate, thereby adjusting the position of the air injection pipe;

[0011] Step 4: Then, the centering component is activated to insert the expansion component into the hole of the engine cylinder block. At this time, the engine cylinder block is fixed by activating the expansion component to complete the clamping of the engine cylinder block;

[0012] Step 5: Then rotate the gear rod clockwise to rotate the engine cylinder and drain the water in the engine cylinder. At the same time, the rotating sleeve remains stationary and the rotating column 2 rotates through the belt drive, so that the moving plate drives the piston rod to move back and forth, and the air in the piston box is blown to the depression on the side of the engine cylinder through the jet pipe.

[0013] Preferably, in step 1, the engine cylinder body is located in the middle of the two support plates, and the two support plates are not in the same vertical plane as the engine cylinder body.

[0014] Preferably, in step 2, during the process of adjusting the position of the outward expansion component, the motor is started, and the output shaft of the motor drives the gear column and the outward expansion component on the gear column to rotate clockwise through the gear rod.

[0015] Preferably, when the gear column rotates clockwise, the belt drives the second rotating column to rotate, but the second rotating column remains stationary due to the obstruction of the guide rod, and eventually the belt on the first rotating column slips.

[0016] Preferably, in step three, the rotation of the gear column drives one side of the rotating plate to abut against the left inner wall of the abutment groove 2, thereby pushing the other side of the rotating plate to abut against the right inner wall of the abutment groove 1, so that the gear column and the rotating sleeve are relatively fixed under the action of the rotating plate, thereby driving the rotating sleeve to rotate synchronously, and then adjusting the position of the jet pipe.

[0017] Preferably, in step 4, when the expansion component is inserted into the hole of the engine cylinder, the expansion component is activated to expand outwards, thereby abutting against the hole of the engine cylinder, thereby completing the clamping of the engine cylinder.

[0018] Preferably, after the outward expansion component is fixed to the engine cylinder body, the support component no longer supports the engine cylinder body and is reset so as not to block the rotation of the engine cylinder body.

[0019] Preferably, in step five, after the outward expansion component is fixed to the engine cylinder body, the gear rod is rotated clockwise by the motor. At this time, the rotation of the gear column drives one side of the rotating plate to abut against the right inner wall of the abutment groove 2, thereby pressing the rotating plate into the abutment groove 1, so that the gear column passes through this abutment groove 2, and is elastically stretched and reset by the spring 2 when entering the next abutment groove 2, and this reciprocating process is repeated to keep the rotating sleeve stationary.

[0020] Preferably, when the gear column rotates at this time, the guide rod slides in the arc groove, so that the guide rod no longer hinders the rotation of the rotating column 2, so that the movable plate drives the piston rod to move in the direction away from the rotating column 1 and elastically compresses the spring 1, thereby transporting the air in the piston box to the airway through the outlet pipe, and enters the annular groove through the airway and is blown out from the air jet pipe.

[0021] Preferably, when the rotating column 2 rotates one circle, the guide rod slides to the other end of the vertical slot, and under the elastic reset action of the spring 1, the guide rod is reset, thereby resetting the piston rod.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. The present invention fixes the engine cylinder block by an outward expansion component so that the surfaces on both sides of the engine cylinder block are not blocked by the rotating sleeve. At the same time, the rotating column 2 rotates, and under the guidance of the guide groove, the guide rod moves back and forth, so that the air in the piston box is output through the air outlet pipe through the piston rod. The air is blown out through the air jet pipe through the guidance of the air channel and the annular groove, and then air is blown to both sides of the engine cylinder block, further drying the side surfaces, preventing the potential problems such as metal oxidation, rust and electrical component short circuit caused by incomplete drying of the side surfaces of the engine cylinder block due to moisture, and also providing a high-quality surface foundation for its subsequent painting process.

[0024] 2. In the present invention, when the gear rod rotates counterclockwise, the rotation of the gear column drives one side of the rotating plate to abut against the left inner wall of the second abutment groove, thereby pushing the other side of the rotating plate to abut against the right inner wall of the first abutment groove, so that the gear column and the rotating sleeve are relatively fixed under the action of the rotating plate, thereby driving the rotating sleeve to rotate synchronously, and then adjusting the position of the air jet pipe so that it blows air into the groove on the side of the engine cylinder block, so that the water in the groove is blown out, and the water droplets remaining on the surface of the groove are evaporated by heat, thereby improving the drying rate of the engine cylinder block. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] Figure 1 It is a schematic elevation view of the overall device of the present invention;

[0027] Figure 2It is a schematic cross-sectional view of the overall device of the present invention;

[0028] Figure 3 This is a schematic diagram of the positional relationship between the centering component and the extension component of the present invention;

[0029] Figure 4 This is a schematic diagram of the positional relationship between the extension member and the support plate of the present invention;

[0030] Figure 5 This is a schematic diagram of the positional relationship between the gear rod and the gear column of the present invention;

[0031] Figure 6 This is a schematic diagram of the positional relationship between the piston box and the suction pipe of the present invention;

[0032] Figure 7 This is a schematic diagram of the positional relationship between the piston rod and the movable plate of the present invention;

[0033] Figure 8 This is a schematic diagram of the positional relationship between the gear column and the airway of the present invention;

[0034] Figure 9 This is a schematic diagram of the positional relationship between the gear column and the rotating sleeve of the present invention;

[0035] Figure 10 This is a schematic diagram of the positional relationship between the rotating sleeve and the air injection pipe of the present invention;

[0036] Figure 11 This invention Figure 10 Enlarged schematic diagram of point A in the middle.

[0037] In the figure: 1, drying box; 11, support component; 12, centering component; 13, extension component; 14, support plate; 15, motor; 16, gear rod; 17, gear column; 18, expansion component;

[0038] 21. Motion groove; 22. Rotating column 1; 23. Belt; 24. Rotating column 2; 25. Guide groove; 26. Guide rod; 27. Limit block; 28. Moving plate; 29. ​​Spring 1; 210. Piston box; 211. Piston rod; 212. Exhaust pipe; 213. Intake pipe; 214. Airway; 215. Rotating sleeve; 216. Annular groove; 217. Injection pipe;

[0039] 31. Abutment groove 1; 32. Abutment groove 2; 33. Shaft; 34. Rotating plate; 35. Spring 2. DETAILED DESCRIPTION

[0040] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0041] Example 1

[0042] See also Figures 1 to 11 As shown, a method for preparing a magnesium alloy engine cylinder block includes raw material preparation, smelting, casting, heat treatment, machining, sandblasting, cleaning, drying and coating treatment, wherein the drying includes the following steps:

[0043] Step 1: Move the cleaned engine cylinder into the drying box 1 and place it on the support component 11;

[0044] Step 2: Start the extension member 13 so that the expansion member 18 and a hole in the engine cylinder are in the same vertical plane. Then start the motor 15 to drive the gear rod 16 to rotate counterclockwise, and drive the expansion member 18 and the engine cylinder to rotate through the gear column 17, thereby draining the water in the engine cylinder;

[0045] Step 3: During the rotation of the gear column 17, the rotating plate 34 contacts the inner wall of one side of the abutment groove 2 32, pushing the other side of the rotating plate 34 to abut the inner wall of the abutment groove 1 31, driving the push plate of the rotating sleeve 215 to rotate, thereby adjusting the position of the air injection pipe 217;

[0046] Step 4: Then, the centering component 12 is activated to insert the expansion component 18 into the hole of the engine cylinder. At this time, the engine cylinder is fixed by activating the expansion component 18 to complete the clamping of the engine cylinder;

[0047] Step 5: Then rotate the gear rod 16 clockwise. At this time, the rotating sleeve 215 is stationary. The belt 23 is used to drive the rotating column 24 to rotate, so that the movable plate 28 drives the piston rod 211 to move back and forth, and the air in the piston box 210 is blown to the concave part on the side of the engine cylinder through the jet pipe 217.

[0048] Example 2

[0049] like Figures 2 to 11 As shown in Comparative Example 1, another embodiment of the present invention is:

[0050] like Figure 2 As shown, the drying equipment in the method for preparing a magnesium alloy engine cylinder block described in this embodiment includes a drying box 1, wherein a support component 11 is provided in the drying box 1, a centering component 12 is provided on the inner wall of one side of the drying box 1, and extension components 13 are symmetrically provided on one side of the centering component 12. A support plate 14 is fixedly provided on each extension component 13, and a motor 15 is fixedly provided on one side of the support plate 14. A gear rod 16 is rotatably connected in the support plate 14, and a gear column 17 is rotatably provided on the gear rod 16. The gear rod 16 meshes with the gear column 17, and an outward expansion component 18 is fixedly provided on one side of the gear column 17;

[0051] The support plate 14 is provided with a blowing assembly, which includes a motion groove 21, a rotating column 24 is rotatably provided in the motion groove 21, a movable plate 28 is slidably provided on the rotating column 24, a piston box 210 is fixedly connected to the top of the rotating column 24, one end of the movable plate 28 is fixedly connected to the piston rod 211, the piston rod 211 slides in the piston box 210, a rotating sleeve 215 is slidably provided on one side of the support plate 14, and an injection pipe 217 is fixedly connected to the rotating sleeve 215. The rotating column 24 is rotated to make the movable plate 28 drive the piston rod 211 to move back and forth, thereby blowing the air in the piston box 210 to the side of the engine cylinder through the injection pipe 217;

[0052] The blowing assembly also includes a rotating column 22, which is fixed to one end of a rotating column 24. A belt 23 is connected to the rotating column 22 and the gear rod 16. A guide groove 25 is provided on the surface of the rotating column 24. The guide groove 25 consists of an arc groove and a vertical groove. The two ends of the vertical groove are respectively connected to the two ends of the arc groove. A guide rod 26 is fixedly connected to the bottom of the movable plate 28. The guide rod 26 slides in the guide groove 25. A limit block 27 fixed in the motion groove 21 is provided above the rotating column 24. The movable plate 28 slides The gear column 17 moves in the limit block 27, and a spring 29 is fixedly connected between the movable plate 28 and the limit block 27. An air outlet pipe 212 is fixedly connected between the piston box 210 and the middle of the gear column 17. An air intake pipe 213 is fixedly connected to the top of the piston box 210. An air duct 214 is provided in the gear column 17, and the air duct 214 consists of a circular groove and two arc grooves. One end of the two arc grooves is connected to the circular groove, and the two arc grooves are symmetrically arranged. An annular groove 216 is provided in the rotating sleeve 215, and the annular groove 216 connects the two arc grooves and the injection pipe 217.

[0053] There are still some problems in the actual application of the above solution. When drying the surface of the engine cylinder, since the engine cylinder needs to rotate during the drying process, its two sides are clamped, so that the two sides of the engine cylinder are blocked by the support plate 14, resulting in the moisture on both sides of the engine cylinder being difficult to be effectively evaporated or taken away, forming a drying blind spot, resulting in incomplete drying of the engine cylinder side, and potential problems such as metal oxidation, rust and electrical component short circuit caused by moisture. In addition, the surface that is not completely dried will form an isolation layer with the paint layer in the subsequent coating process, resulting in reduced adhesion of the coating and easy bubbling or peeling. At the same time, the gas generated by water evaporation may cause surface defects such as pinholes, further exacerbating the risk of substandard coating quality, and ultimately affecting the overall corrosion resistance, appearance quality and assembly reliability of the engine, increasing rework costs and market complaint risks.

[0054] Specifically, an air gun is provided in the drying box 1 for spraying high-temperature gas onto the engine cylinder. The circumference ratio of the gear rod 16 to the rotating column 22 is three to one, so that the piston rod 211 delivers more air to the air duct 214 through the outlet pipe 212. Initially, the guide rod 26 is at one end of the vertical slot;

[0055] After cleaning, the cleaned engine block is moved into the drying oven 1 and placed on the support member 11. The extension member 13 is activated to align the expansion member 18 with a hole in the engine block. The motor 15 is then activated to rotate the gear rod 16, thereby rotating the gear column 17 and the expansion member 18.

[0056] When the gear rod 16 rotates counterclockwise, the belt 23 drives the second rotating column 24 to push the plate to rotate. However, because the guide rod 26 slides in the vertical groove, the second rotating column 24 does not rotate due to the obstruction of the guide rod 26, causing the belt 23 on the first rotating column 22 to slip.

[0057] When the gear rod 16 rotates clockwise, the second rotating column 24 rotates, and the guide rod 26 slides in the arc groove. Thus, the guide rod 26 no longer hinders the rotation of the second rotating column 24, causing the movable plate 28 to drive the piston rod 211 to move away from the first rotating column 22 and elastically compress the spring 1 29, thereby transporting the air in the piston box 210 through the outlet pipe 212 to the air channel 214, and then entering the annular groove 216 through the air channel 214 and being blown out from the air injection pipe 217.

[0058] When the rotating column 24 rotates one circle, the guide rod 26 slides to the other end of the vertical slot, and under the elastic restoring action of the spring 1 29, the guide rod 26 is reset, thereby restoring the piston rod 211;

[0059] Then, the centering component 12 is started to insert the outward expansion component 18 into the hole of the engine cylinder. At this time, the engine cylinder is fixed by starting the outward expansion component 18, so that the gear rod 16 rotates clockwise, thereby rotating the engine cylinder and draining the water in the engine cylinder. At the same time, the rotating sleeve 215 is stationary, and the rotating column 24 is rotated through the belt 23, so that the movable plate 28 drives the piston rod 211 to move back and forth, and the air in the piston box 210 is blown to the side of the engine cylinder through the jet pipe 217.

[0060] The present invention fixes the engine cylinder body through the outward expansion component 18, so that the surfaces on both sides of the engine cylinder body are not blocked by the rotating sleeve 215. At the same time, the rotating column 24 rotates, and under the guidance of the guide groove 25, the guide rod 26 moves back and forth, so that the air in the piston box 210 is output through the air outlet pipe 212 through the piston rod 211. The air is blown out through the air passage 214 and the annular groove 216 through the air injection pipe 217, and then air is blown to both sides of the engine cylinder body, further drying the side surfaces thereof, preventing the side surfaces of the engine cylinder body from being incompletely dried, which may easily cause potential problems such as metal oxidation, rust, and short circuit of electrical components due to moisture, and also providing a high-quality surface foundation for its subsequent painting process.

[0061] As shown in the figure, a direction adjustment component is provided between the gear column 17 and the rotating sleeve 215 in this embodiment, and the direction adjustment component includes an abutment groove 1 31, and the abutment groove 1 31 is provided in the gear column 17, and an abutment groove 2 32 is provided in the rotating sleeve 215. A shaft rod 33 is fixedly connected in the abutment groove 1 31, and a rotating plate 34 is rotatably connected to the surface of the shaft rod 33. A spring 2 35 is fixedly connected between one side of the rotating plate 34 and the bottom of the abutment groove 1 31. The rotating plate 34 is abutted against the inner wall of the abutment groove 2 32 by the movement of the gear column 17, so that the rotating sleeve 215 is driven to rotate by the rotating plate 34 when rotating in only one direction, thereby adjusting the position of the jet pipe 217.

[0062] Specifically, when the gear rod 16 rotates counterclockwise, the rotation of the gear column 17 drives one side of the rotating plate 34 to abut against the left inner wall of the abutment groove 2 32, thereby pushing the other side of the rotating plate 34 to abut against the right inner wall of the abutment groove 1 31, so that the gear column 17 and the rotating sleeve 215 are relatively fixed under the action of the rotating plate 34, thereby driving the rotating sleeve 215 to rotate synchronously, and then adjusting the position of the air jet 217 to blow air into the groove on the side of the engine cylinder block, so that the water inside the groove is blown out, and the water droplets remaining on the surface are evaporated by heat, thereby improving the drying rate of the engine cylinder block.

[0063] When the gear rod 16 rotates clockwise, the rotation of the gear column 17 drives one side of the rotating plate 34 to abut against the right inner wall of the abutment groove 2 32, thereby pressing the rotating plate 34 into the abutment groove 1 31, so that the gear column 17 passes through this abutment groove 2 32 and is elastically extended and reset by the spring 2 35 when entering the next abutment groove 2 32, and this reciprocating process keeps the rotating sleeve 215 stationary.

[0064] Working principle: After cleaning, the cleaned engine block is moved into the drying box 1 and placed on the support member 11. The extension member 13 is activated to align the expansion member 18 with a hole in the engine block. Then, the motor 15 is activated to drive the gear rod 16 to rotate counterclockwise, thereby driving the gear column 17 and the expansion member 18 to rotate.

[0065] At this time, driven by the belt 23, the second rotating column 24 should push the plate to rotate. However, because the guide rod 26 slides in the vertical groove, the second rotating column 24 is blocked by the guide rod 26 and cannot rotate, causing the belt 23 on the first rotating column 22 to slip.

[0066] At the same time, when the gear rod 16 rotates counterclockwise, the rotation of the gear column 17 drives one side of the rotating plate 34 to abut against the left inner wall of the second abutment groove 32, thereby pushing the other side of the rotating plate 34 to abut against the right inner wall of the first abutment groove 31, so that the gear column 17 and the rotating sleeve 215 are relatively fixed under the action of the rotating plate 34, thereby driving the rotating sleeve 215 to rotate synchronously, and then adjusting the position of the air injection pipe 217 so that it blows air into the groove on the side of the engine cylinder body;

[0067] Then, the centering member 12 is activated to insert the expansion member 18 into the hole of the engine cylinder. At this time, the engine cylinder is fixed by activating the expansion member 18, so that the gear rod 16 rotates clockwise, thereby rotating the engine cylinder;

[0068] When the gear rod 16 rotates clockwise, the rotation of the gear column 17 drives one side of the rotating plate 34 to abut against the right inner wall of the second abutment groove 32, thereby pressing the rotating plate 34 into the first abutment groove 31, causing the gear column 17 to pass through the second abutment groove 32 and elastically extend and return to the next second abutment groove 32 by the second spring 35. This reciprocating process keeps the rotating sleeve 215 stationary.

[0069] At this time, when the second rotating column 24 rotates, the guide rod 26 slides in the arc-shaped groove, so that the guide rod 26 no longer hinders the rotation of the second rotating column 24, causing the movable plate 28 to drive the piston rod 211 to move away from the first rotating column 22 and elastically compress the first spring 29, thereby transporting the air in the piston box 210 through the outlet pipe 212 to the air channel 214, and then entering the annular groove 216 through the air channel 214 and being blown out from the air injection pipe 217;

[0070] When the rotating column 24 rotates one circle, the guide rod 26 slides to the other end of the vertical slot, and under the elastic restoring action of the spring 1 29, the guide rod 26 is reset, thereby restoring the piston rod 211;

[0071] At the same time, the rotating sleeve 215 is stationary, and the rotating column 24 is rotated through the belt 23, so that the movable plate 28 drives the piston rod 211 to move back and forth, and the air in the piston box 210 is blown to the side of the engine cylinder through the jet pipe 217.

[0072] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a magnesium alloy engine cylinder block, comprising raw material preparation, smelting, casting, heat treatment, machining, sandblasting, cleaning, drying and coating treatment, characterized in that: Drying involves the following steps: Step 1: Move the cleaned engine cylinder into the drying box (1) and place it on the support component (11); Step 2: Start the extension member (13) to make the expansion member (18) and a hole in the engine cylinder body be in the same vertical straight line, then start the motor (15) to drive the gear rod (16) to rotate counterclockwise, and drive the expansion member (18) to rotate through the gear column (17); Step 3: During the rotation of the gear column (17), the rotating plate (34) is brought into contact with the inner wall of one side of the abutment groove (32), and the other side of the rotating plate (34) is pushed to abut against the inner wall of the abutment groove (31), thereby driving the push plate of the rotating sleeve (215) to rotate, thereby adjusting the position of the jet pipe (217); Step 4: Then, the centering component (12) is activated to insert the expansion component (18) into the hole of the engine cylinder body. At this time, the engine cylinder body is fixed by activating the expansion component (18), thereby completing the clamping of the engine cylinder body; Step 5: Then, the gear rod (16) is rotated clockwise, thereby rotating the engine cylinder body and draining the water in the engine cylinder body. At the same time, the rotating sleeve (215) is stationary, and the rotating column 2 (24) is rotated through the belt (23), so that the movable plate (28) drives the piston rod (211) to move back and forth, and the air in the piston box (210) is blown to the concave part of the side of the engine cylinder body through the jet pipe (217).

2. The method for preparing a magnesium alloy engine cylinder block according to claim 1, wherein: In step one, the engine cylinder body is located in the middle of the two support plates (14), and the two support plates (14) are not in the same vertical plane as the engine cylinder body.

3. The method for preparing a magnesium alloy engine cylinder block according to claim 1, wherein: In step 2, during the process of adjusting the position of the outward expansion component (18), the motor (15) is started, and the output shaft of the motor (15) drives the gear column (17) and the outward expansion component (18) on the gear column (17) to rotate clockwise through the gear rod (16).

4. The method for preparing a magnesium alloy engine cylinder block according to claim 3, characterized in that: When the gear column (17) rotates clockwise, the belt (23) drives the rotating column 2 (24) to rotate. However, due to the obstruction of () 260, the rotating column 2 (24) remains stationary, and finally the belt (23) on the rotating column 1 (22) slips.

5. The method for preparing a magnesium alloy engine cylinder block according to claim 1, wherein: In step three, the rotation of the gear column (17) drives one side of the rotating plate (34) to abut against the left inner wall of the abutting groove 2 (32), thereby pushing the other side of the rotating plate (34) to abut against the right inner wall of the abutting groove 1 (31), so that the gear column (17) and the rotating sleeve (215) are relatively fixed under the action of the rotating plate (34), thereby driving the rotating sleeve (215) to rotate synchronously, thereby adjusting the position of the air injection pipe (217).

6. The method for preparing a magnesium alloy engine cylinder block according to claim 1, characterized in that: In step 4, when the expansion component (18) is inserted into the hole of the engine cylinder, the expansion component (18) is activated to expand outward, thereby abutting against the hole of the engine cylinder, thereby completing the clamping of the engine cylinder.

7. The method for preparing a magnesium alloy engine cylinder block according to claim 6, characterized in that: When the outward expansion component (18) is fixed to the engine cylinder body, the support component (11) no longer supports the engine cylinder body and is reset so as not to block the rotation of the engine cylinder body.

8. The method for preparing a magnesium alloy engine cylinder block according to claim 1, characterized in that: In step five, after the outer expansion component (18) is fixed to the engine cylinder, the gear rod (16) is rotated clockwise by the motor (15). At this time, the rotation of the gear column (17) drives one side of the rotating plate (34) to abut against the right inner wall of the abutting groove 2 (32), thereby pressing the rotating plate (34) into the abutting groove 1 (31), so that the gear column (17) passes through this abutting groove 2 (32) and is elastically stretched and reset by the spring 2 (35) when entering the next abutting groove 2 (32). This reciprocating process keeps the rotating sleeve (215) stationary.

9. The method for preparing a magnesium alloy engine cylinder block according to claim 8, characterized in that: At this time, when the gear column (17) rotates, the guide rod (26) slides in the arc groove, so that the guide rod (26) no longer hinders the rotation of the rotating column 2 (24), so that the movable plate (28) drives the piston rod (211) to move in the direction away from the rotating column 1 (22) and elastically compresses the spring 1 (29), thereby transporting the air in the piston box (210) through the outlet pipe (212) to the air channel (214), and enters the annular groove (216) through the air channel (214) and is blown out from the air injection pipe (217).

10. The method for preparing a magnesium alloy engine cylinder block according to claim 9, characterized in that: When the rotating column 2 (24) rotates one circle, the guide rod (26) slides to the other end of the vertical slot, and under the elastic reset action of the spring 1 (29), the guide rod (26) is reset, thereby resetting the piston rod (211).

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