HCCI-based engine cylinder and manufacturing process thereof

Abstract

The application belongs to the technical field of engine cylinder block preparation, in particular to an engine cylinder block based on HCCI and a preparation process thereof, comprising a body, first, when the engine cylinder block is completed by die casting, a hydraulic cylinder drives a sealing plate to separate from a mold plate, the fixed connection between the mold plate and the body is released, the engine cylinder block is separated from the mold plate, then the mold plate is reinstalled on the upper surface of the body, after the installation of the mold plate is completed, the electric sliding table on the upper surface of the fixed frame is started, the electric sliding table slides along the fixed guide rail on the surface of the fixed frame, the electric sliding table drives the scraping block arranged on one side to rotate while sliding, the scraping block abuts against the upper surface of the mold plate, and the metal residues on the surface of the mold plate are scraped off along with the sliding of the electric sliding table, and the problem of metal residues on the edge of the mold plate is solved by arranging the scraping assembly.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of engine cylinder block preparation, in particular to an engine cylinder block based on HCCI and a preparation process thereof. BACKGROUND

[0002] The engine cylinder block based on HCCI (homogeneous charge compression ignition) is an engine cylinder block combining the advantages of gasoline engines and diesel engines, which realizes efficient and low-emission combustion by premixing fuel and air and self-igniting in the compression stroke.

[0003] The existing preparation process of the engine cylinder block is a complex and delicate process, including raw material preparation, mold making, casting operation, cooling treatment, rough machining, finishing, surface treatment, quality detection and assembly, etc. First, suitable casting materials such as aluminum alloy or iron alloy are selected, and accurate molds are made. Then, the molten metal liquid is poured into the mold through gravity casting or low-pressure casting, the pouring parameters are strictly controlled, the casting is taken out after cooling and solidification, and preliminary and delicate processing is carried out to ensure size and accuracy. Finally, surface treatment is carried out to improve corrosion resistance and wear resistance, and after strict quality detection, assembly is carried out to form the final product.

[0004] However, during the pouring process of the existing engine cylinder block, when the mold is sealed and combined, due to the filling pressure of the molten alloy and the small gap of the mold itself, part of the molten alloy will overflow from the edge of the mold. These overflowing molten alloy rapidly cools and solidifies at the edge of the mold, forming a layer of solid metal residue. When the mold is sealed again during subsequent pouring operations, these solidified metal residues will become an obstacle, causing the mold to fail to seal completely. This not only affects the forming quality of the cylinder block, causing surface defects or even internal cavities, but also reduces the service life of the mold, increases production costs, and more seriously, the poor sealing may also cause alloy leakage during pouring.

[0005] Therefore, the application provides an engine cylinder block based on HCCI and a preparation process thereof. SUMMARY

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background art.

[0007] The technical scheme adopted by the application to solve its technical problems is that the preparation process of the engine cylinder block based on HCCI comprises preparing materials, installing molds, casting cylinder blocks, finishing treatment and detecting delivery, step one: after the preparation of the cylinder block molten material is completed, install the cylinder block mold plate on the upper surface of the casting machine body, and prepare for casting;

[0008] Step two: inject the molten alloy material into the mold plate, and drive the sealing plate by the hydraulic cylinder of the top wall of the body to seal the mold plate filled with the molten alloy;

[0009] Step three: after sealing, wait for the molten alloy to cool down, lift the sealing plate, remove the mold plate, take out the engine cylinder, and then install the mold plate back to the upper surface of the body, repeat step one and step two to cast the engine cylinder.

[0010] Preferably, in step two, the hydraulic cylinder of the top wall of the body is started, and the sealing plate at the output end of the hydraulic cylinder is moved towards the mold plate. When the fixed tube on the surface of the mold plate is inserted into the insertion hole on the lower surface of the sealing plate, the insertion column on the lower surface of the sealing plate is also inserted into the fixed hole in the fixed tube. At this time, the sealing of the engine cylinder is completed.

[0011] Preferably, in step three, the upper surface of the body is provided with a mold plate, and the mold plate is provided with a fixed frame around. A scraping assembly for cleaning the edge of the mold plate is slidingly arranged on the fixed frame. The scraping assembly includes a scraping block abutting against the mold plate, and the metal residues on the edge of the mold plate are scraped off.

[0012] Preferably, the scraping work is as follows: first, when the engine cylinder casting is completed, the hydraulic cylinder drives the sealing plate to separate from the mold plate, and the mold plate is fixed to the body. The engine cylinder is separated from the mold plate, and then the mold plate is reinstalled on the upper surface of the body. After the installation of the mold plate is completed, the electric sliding table on the upper surface of the fixed frame is started, and the electric sliding table slides along the fixed guide rail on the surface of the fixed frame. The electric sliding table slides while driving the scraping block rotatingly arranged on one side of the electric sliding table. The scraping block abuts against the upper surface of the mold plate, and the metal residues on the surface of the mold plate are scraped off along with the sliding of the electric sliding table.

[0013] Preferably, during the cleaning process of the edge of the mold plate by the scraping block along with the electric sliding table, the surface of the mold plate is provided with a fixed tube abutting against the sealing plate. When the scraping block abuts against the fixed tube, the reaction force of the fixed tube on the scraping block makes the scraping block rotate around the rotating shaft. After passing by one of the fixed tubes, the scraping block is reset under the action of the reset force of the torsional spring, and the surface of the mold plate is scraped off again.

[0014] Preferably, during the scraping work of the surface of the mold plate by the scraping block, the coating roller in the scraping block works synchronously to coat the surface of the mold plate with a release agent.

[0015] Preferably, the coating roller specifically works as follows: when the scraping block abuts against the mold plate, the connecting frame in the scraping block is extruded into the fixed cavity by the mold plate, at this time, the fixed grooves on both sides of the connecting frame are centered with the connecting grooves on the inner wall of the fixed cavity, the release agent built in the scraping block flows into the positioning cavity in the connecting frame, the coating roller is soaked, and the coating roller immediately performs coating work after the scraping work of the scraping block, in addition, the connecting grooves and the fixed grooves are dislocated under the action of the resetting force of the compression spring when the fixed pipe is encountered, at this time, the release agent does not penetrate into the positioning cavity.

[0016] Preferably, while the scraping block performs the scraping work, the two cleaning rollers rotatably arranged on one side of the scraping block abut against the outer wall of the mold plate, and the cleaning rollers work synchronously with the scraping block to clean the metal remaining on the outer wall of the mold plate.

[0017] Preferably, after the scraping block, the coating roller and the cleaning roller complete the scraping and coating work, the limiting shaft in the one-side rotating groove of the electric sliding table is started, the rotation of the limiting shaft pulls the steel wire between the scraping block, and the steel wire is fixedly connected with the connecting ring on one side of the scraping block, so that the scraping block is retracted into the storage groove, and then the engine cylinder is cast again.

[0018] A HCCI-based engine cylinder includes a cylinder body, and an upper surface of the cylinder body is provided with a piston hole for piston movement.

[0019] The beneficial effects of the present application are as follows:

[0020] 1. The HCCI-based engine cylinder and the preparation process thereof can effectively remove the metal residues on the surface of the mold plate through the scraping of the scraping block, avoid the influence of the residues on the subsequent die casting work, save the time and cost of manual cleaning, realize the rapid and efficient cleaning of the surface of the mold plate through the cooperative work of the electric sliding table and the scraping block, and provide a strong guarantee for the continuous and high-quality production of the engine cylinder. In addition, the device has good reliability and durability, and can adapt to long-term and high-intensity production requirements.

[0021] 2. The HCCI-based engine cylinder body and its manufacturing process, when the fixed tube arranged on the surface of the mold plate needs to be adaptively bypassed during the process of the scraping block cleaning the edge of the mold plate with the electric sliding table, the reaction force generated by the fixed tube on the scraping block will make the scraping block rotate around the preset rotating shaft when the scraping block moves to the position of the fixed tube and abuts against it, so as to avoid the fixed tube and avoid the direct impact on the fixed tube, when the scraping block bypasses the fixed tube, the restoring force of the torsional spring will act, pushing the scraping block to reset rapidly, so that it can be tightly attached to the surface of the mold plate again, and continue to scrape and clean the residual metal, ensuring the continuity and efficiency of the scraping work, and effectively protecting the fixed tube on the mold plate and prolonging the service life of the mold, through the flexible rotation of the scraping block and the resetting effect of the torsional spring, the cleaning process realizes the comprehensive and dead angle-free cleaning of the surface of the mold plate. BRIEF DESCRIPTION OF DRAWINGS

[0022] The application will be further described below with reference to the drawings.

[0023] Figure 1 is a perspective view of the embodiment one of the application;

[0024] Figure 2 is a structural schematic view of the main body of the application;

[0025] Figure 3 is a structural schematic view of the scraping assembly of the application;

[0026] Figure 4 is a structural schematic view of the electric sliding table of the application;

[0027] Figure 5 is a structural schematic view of the scraping block of the application;

[0028] Figure 6 is a sectional view of the scraping block of the application;

[0029] Figure 7 is a structural schematic view of the connecting groove of the application;

[0030] Figure 8 is a structural schematic view of the mold plate of the application;

[0031] Figure 9 is a structural schematic view of the sealing plate of the application;

[0032] Figure 10 is a structural schematic view of the engine cylinder body of the application.

[0033] In the figure: 1, body; 11, mold plate; 12, insertion slot; 13, fixed tube; 14, fixed hole;

[0034] 2. Fixed frame; 21. Fixed guide rail; 22. Electric slide table; 23. Scraper; 24. Rotating shaft; 25. Torsion spring; 26. Fixed cavity; 27. Compression spring; 28. Connecting frame; 29. ​​Fixed groove; 210. Positioning cavity; 211. Coating roller; 212. Connecting groove; 213. Cleaning roller; 214. Connecting ring; 215. Storage groove; 216. Rotating groove; 217. Limiting shaft;

[0035] 3. Sealing plate; 31. Hydraulic cylinder; 32. Insertion post; 33. Insertion hole; 34. Insertion plate;

[0036] 4. Cylinder block 1; 41. Piston bore. Detailed Implementation

[0037] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0038] Example 1: As Figures 1 to 9 As shown in the embodiment of the present invention, an engine cylinder block based on HCCI and its manufacturing process include material preparation, mold installation, cylinder block casting, precision machining, and inspection before shipment. Specifically, step one: after the molten material for the cylinder block is prepared, the cylinder block mold plate 11 is installed on the upper surface of the casting machine body 1, ready for casting; step two: the molten alloy material is injected into the mold plate 11, and the sealing plate 3 is driven by the hydraulic cylinder 31 on the top wall of the machine body 1 to seal the mold plate 11 containing the molten alloy; step three: after sealing, after the molten alloy cools, the sealing plate 3 is lifted, the mold plate 11 is removed, the engine cylinder block is taken out, and the mold plate 11 is reinstalled on the upper surface of the machine body 1. Steps one and two are repeated to cast the engine cylinder block.

[0039] like Figure 8 and Figure 9 As shown, in step two of this embodiment, the hydraulic cylinder 31 on the top wall of the machine body 1 is activated. The hydraulic cylinder 31 drives the sealing plate 3 at its output end to move toward the mold plate 11. When the fixing tube 13 on the surface of the mold plate 11 is inserted into the insertion hole 33 on the lower surface of the sealing plate 3, the insertion post 32 on the lower surface of the sealing plate 3 will also be inserted into the fixing hole 14 in the fixing tube 13. At this time, the sealing die casting of the engine cylinder body is completed.

[0040] Specifically, the hydraulic cylinder 31 controls the rapid and accurate docking between the sealing plate 3 and the mold plate 11.

[0041] like Figure 2 and Figure 3As shown, the upper surface of the body 1 is provided with a mold plate 11 in step three, the four sides of the mold plate 11 are provided with a fixed frame 2, the fixed frame 2 is provided with a scraping assembly for cleaning the edge of the mold plate 11, the scraping assembly includes a scraping block 23 abutting the mold plate 11, and the metal residues on the edge of the mold plate 11 are scraped.

[0042] Specifically, the metal residues on the edge of the mold plate 11 are scraped by the scraping assembly provided on the upper surface of the fixed frame 2, so that the metal residues on the surface of the mold plate 11 do not affect the abutment of the mold plate 11 and the sealing plate 3 in the subsequent use process, preventing gaps at the abutment of the sealing plate 3 and the mold plate 11, and improving the production quality of the engine cylinder.

[0043] As shown in the figure, Figures 3 to 5 The scraping work of the present embodiment is as follows: first, when the engine cylinder is completed, the hydraulic cylinder 31 drives the sealing plate 3 to separate from the mold plate 11, the mold plate 11 is separated from the body 1, and then the mold plate 11 is reinstalled on the upper surface of the body 1. After the installation of the mold plate 11 is completed, the electric sliding table 22 on the upper surface of the fixed frame 2 is started, the electric sliding table 22 can slide along the fixed guide rail 21 on the surface of the fixed frame 2, and the scraping block 23 on one side of the electric sliding table 22 is rotated, the scraping block 23 abuts the upper surface of the mold plate 11, and the metal residues on the surface of the mold plate 11 are scraped along with the sliding of the electric sliding table 22;

[0044] Through the scraping of the scraping block 23, the metal residues on the surface of the mold plate 11 are effectively removed, the influence of the residues on the subsequent die casting work is avoided, the time and cost of manual cleaning are saved, the electric sliding table 22 and the scraping block 23 work together to realize the rapid and efficient cleaning of the surface of the mold plate 11, and provide a strong guarantee for the continuous and high-quality production of the engine cylinder. In addition, the device also has good reliability and durability, and can adapt to long-term and high-intensity production needs.

[0045] As shown in the figure, Figure 6 During the cleaning process of the mold plate 11 by the scraping block 23 and the electric sliding table 22, the mold plate 11 is provided with a fixed pipe 13 abutting the sealing plate 3, when the scraping block 23 abuts the fixed pipe 13, the reaction force of the fixed pipe 13 on the scraping block 23 makes the scraping block 23 rotate around the rotating shaft 24, and when passing through one of the fixed pipes 13, the scraping block 23 is reset under the reset force of the torsional spring 25, and then the scraping block 23 is scraped and cleaned again.

[0046] Specifically, during the process of the scraper 23 cleaning the edge of the mold plate 11 along with the electric slide 22, the fixing tube 13 on the surface of the mold plate 11 needs to be adaptively bypassed. When the scraper 23 moves to the position of the fixing tube 13 and abuts against it, the reaction force generated by the fixing tube 13 on the scraper 23 will cause the scraper 23 to rotate around the preset rotation axis 24, thereby avoiding the fixing tube 13 and avoiding direct impact on the fixing tube 13. When the scraper 23 bypasses the fixing tube 13, the restoring force of the torsion spring 25 will play a role, pushing the scraper 23 to quickly return to its original position, so that it can once again closely adhere to the surface of the mold plate 11 and continue to scrape and clean the residual metal, ensuring the continuity and efficiency of the scraping work, while also effectively protecting the fixing tube 13 on the mold plate 11 and extending the service life of the mold. Through the flexible rotation of the scraper 23 and the restoring action of the torsion spring 25, this cleaning process achieves a comprehensive and thorough cleaning of the surface of the mold plate 11.

[0047] Example 2: Figures 1 to 9 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: During the scraping work of the scraper block 23 on the surface of the mold plate 11, the coating roller 211 inside the scraper block 23 will work simultaneously to coat the surface of the mold plate 11 with a release agent. Specifically, when the scraper block 23 abuts against the mold plate 11, the connecting frame 28 inside the scraper block 23 is squeezed into the fixing cavity 26 by the mold plate 11. At this time, the fixing grooves 29 on both sides of the connecting frame 28 are aligned with the connecting grooves 212 on both sides of the inner wall of the fixing cavity 26. The release agent inside the scraper block 23 flows into the positioning cavity 210 in the connecting frame 28 and wets the coating roller 211. The coating roller 211 immediately performs the coating work after the scraping work of the scraper block 23. In addition, when it encounters the fixing tube 13, the pressure spring 27 causes the connecting groove 212 and the fixing groove 29 to be misaligned. At this time, the release agent does not penetrate into the positioning cavity 210.

[0048] Specifically, while the scraping block 23 scrapes the surface of the mold plate 11, the coating roller 211 inside the scraping block 23 is also started synchronously, realizing double processing of the surface of the mold plate 11. When the scraping block 23 is in close contact with the mold plate 11 and begins to scrape the residual metal, the connecting frame 28 inside the scraping block 23 is gently extruded by the mold plate 11, and then slides into the fixed cavity 26. At this time, the fixed grooves 29 on both sides of the connecting frame 28 are centered with the connecting grooves 212 on the inner wall of the fixed cavity 26. The release agent built in the scraping block 23 is guided to flow into the positioning cavity 210 in the connecting frame 28, and fully wets the coating roller 211. As the scraping block 23 completes the scraping work and continues to move, the coating roller 211 wetted with the release agent immediately adheres to the surface of the mold plate 11 and uniformly applies the release agent, providing good release conditions for subsequent die casting operations, reducing residual metal on the surface of the mold plate 11, and coating the release agent helps clean the surface of the mold plate 11 next time. When the scraping block 23 encounters the fixed tube 13 on the mold plate 11 again, the connecting frame 28 quickly adjusts its position under the action of the restoring force of the compression spring 27, so that the fixed grooves 29 are misaligned with the connecting grooves 212, cutting off the supply of release agent and preventing the release agent from seeping into the positioning cavity 210 in areas where it is not needed. This saves release agent, reduces the need for release agent, and improves cleaning efficiency and production quality.

[0049] As shown in Figure 6 the scraping block 23 described in the present embodiment performs scraping work, the two cleaning rollers 213 rotatably arranged on one side of the scraping block 23 are in contact with the outer wall of the mold plate 11, and the cleaning rollers 213 work synchronously with the scraping block 23 to clean the residual metal on the outer wall of the mold plate 11.

[0050] Specifically, while the scraping block 23 scrapes the residual metal on the surface of the mold plate 11, the two cleaning rollers 213 rotatably arranged on one side of the scraping block 23 are in close contact with the outer wall of the mold plate 11 and perform cleaning work synchronously. Not only does this enhance the cleaning effect and ensure that the residual metal on the outer wall of the mold plate 11 is completely removed, but it also improves work efficiency. Through the synergistic effect of the cleaning rollers 213 and the scraping block 23, the surface and outer wall of the mold plate 11 can be thoroughly cleaned, providing a cleaner working environment for subsequent die casting operations.

[0051] As shown in Figure 4As shown, after the scraping block 23, the coating roller 211 and the cleaning roller 213 complete the scraping and coating work, the limiting shaft 217 in the one side rotating groove 216 of the electric sliding table 22 is started, the rotation of the limiting shaft 217 pulls the steel wire between the scraping block 23, the steel wire is fixedly connected with the connecting ring 214 on one side of the scraping block 23, and the scraping block 23 is retracted into the storage groove 215. Subsequently, the engine cylinder is cast again, the scraping block 23 is retracted, the problem that the scraping block 23 directly abuts against the mold plate 11 is solved, the retracted scraping block 23 does not affect the casting of the engine cylinder, and when the scraping block 23 is released, the mold plate 11 can be cleaned, thereby saving the cost of manual cleaning.

[0052] Working principle, by starting the hydraulic cylinder 31 on the top wall of the body 1, the hydraulic cylinder 31 drives the sealing plate 3 at the output end to move towards the mold plate 11, when the fixed pipe 13 on the surface of the mold plate 11 is inserted into the insertion hole 33 on the lower surface of the sealing plate 3, the insertion column 32 on the lower surface of the sealing plate 3 is also inserted into the fixed hole 14 in the fixed pipe 13, at this time, the sealing and pressure casting of the engine cylinder is completed, through the control of the hydraulic cylinder 31, the quick and accurate butt joint between the sealing plate 3 and the mold plate 11 is realized;

[0053] When the engine cylinder pressure casting is completed, the hydraulic cylinder 31 drives the sealing plate 3 to separate from the mold plate 11, the sealing plate 11 and the body 1 are fixedly connected, the engine cylinder and the mold plate 11 are separated, and then the mold plate 11 is reinstalled on the upper surface of the body 1. After the installation of the mold plate 11 is completed, the electric sliding table 22 on the upper surface of the fixed frame 2 is started, the electric sliding table 22 can slide along the fixed guide rail 21 opened on the surface of the fixed frame 2, and the electric sliding table 22 slides while driving the scraping block 23 arranged on one side to abut against the upper surface of the mold plate 11. With the sliding of the electric sliding table 22, the metal residues on the surface of the mold plate 11 are scraped off;

[0054] Through the scraping of the scraping block 23, not only the metal residues on the surface of the mold plate 11 are effectively removed, but also the influence of the residues on the subsequent pressure casting work is avoided, the time and cost of manual cleaning are saved, through the cooperative work of the electric sliding table 22 and the scraping block 23, the quick and efficient cleaning of the surface of the mold plate 11 is realized, which provides a strong guarantee for the continuous and high-quality production of the engine cylinder. In addition, the device also has good reliability and durability, and can adapt to long-term and high-intensity production needs;

[0055] In the process of the scraping block 23 cleaning the edge of the mold plate 11 with the electric sliding table 22, the fixed tube 13 arranged on the surface of the mold plate 11 needs to be adaptively bypassed. When the scraping block 23 moves to the position of the fixed tube 13 and abuts against it, the reaction force of the fixed tube 13 on the scraping block 23 can make the scraping block 23 rotate around the preset rotating shaft 24, so as to bypass the fixed tube 13 and avoid direct impact on the fixed tube 13. When the scraping block 23 bypasses the fixed tube 13, the restoring force of the torsional spring 25 can be exerted to push the scraping block 23 to quickly reset, so that the scraping block 23 can be tightly attached to the surface of the mold plate 11 again to continue scraping and cleaning the residual metal, thereby ensuring the continuity and efficiency of the scraping work, effectively protecting the fixed tube 13 on the mold plate 11 and prolonging the service life of the mold. Through the flexible rotation of the scraping block 23 and the resetting action of the torsional spring 25, the cleaning process can realize full and dead-angle-free cleaning of the surface of the mold plate 11.

[0056] In addition, the coating roller 211 inside the scraping block 23 is also started at the same time when the scraping block 23 is scraping the surface of the mold plate 11, so as to realize double processing of the surface of the mold plate 11. When the scraping block 23 abuts against the mold plate 11 and starts to scrape the residual metal, the connecting frame 28 inside the scraping block 23 is slightly extruded by the mold plate 11 and then slides into the fixed cavity 26. At this time, the fixed grooves 29 on both sides of the connecting frame 28 are centered with the connecting grooves 212 on the inner wall of the fixed cavity 26, the built-in release agent in the scraping block 23 is guided to flow into the positioning cavity 210 in the connecting frame 28 and fully wets the coating roller 211. With the completion of the scraping work of the scraping block 23 and the continuous movement, the coating roller 211 wetted with the release agent immediately adheres to the surface of the mold plate 11 to uniformly coat the release agent, thereby providing good release conditions for the subsequent die casting operation and reducing the residual metal on the surface of the mold plate 11. Coating the release agent is helpful for the next cleaning of the surface of the mold plate 11. When the scraping block 23 encounters the fixed tube 13 on the mold plate 11 again, the connecting frame 28 quickly adjusts the position under the action of the restoring force of the compression spring 27, so that the fixed grooves 29 are misaligned with the connecting grooves 212, the supply of the release agent is cut off, the release agent is prevented from seeping into the positioning cavity 210 in the area where coating is not needed, the release agent is saved, the supplement of the release agent is reduced, and the cleaning efficiency and production quality are improved.

[0057] Finally, when the scraping block 23, the coating roller 211 and the cleaning roller 213 complete the scraping and coating work, the limiting shaft 217 in the side rotating groove 216 of the electric sliding table 22 is started, the rotation of the limiting shaft 217 pulls the steel wire between the scraping block 23, the steel wire is fixedly connected with the connecting ring 214 on one side of the scraping block 23, the scraping block 23 is retracted into the storage groove 215, and then the engine cylinder is cast again. The retraction of the scraping block 23 solves the problem that the scraping block 23 directly abuts against the mold plate 11. The retracted scraping block 23 does not affect the casting of the engine cylinder. When the scraping block 23 is released, it can clean the mold plate 11, thereby saving the cost of manual cleaning.

[0058] The foregoing is considered as illustrative only of the principles of the application. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the application to the exact construction and practice described. Accordingly, all such variations and modifications are intended to be included within the scope of the application as defined in the following claims and the equivalents thereof.

Claims

1. A process for preparing a cylinder block of an HCCI-based engine, characterized by, The method comprises the following steps: Step 1: after the cylinder body molten material preparation is completed, the cylinder mold plate (11) is installed on the upper surface of the casting machine body (1), and preparation for casting is made; Step 2: the molten alloy material is poured into the mold plate (11), and the sealing plate (3) is driven by the hydraulic cylinder (31) on the top wall of the machine body (1) to seal the mold plate (11) filled with the molten alloy; Step 3: after the sealing is completed, after the molten alloy is cooled, the sealing plate (3) is lifted, the mold plate (11) is removed, the engine cylinder is taken out, the mold plate (11) is installed back on the upper surface of the machine body (1), and steps 1 and 2 are repeated to cast the engine cylinder; In step 3, the mold plate (11) is installed on the upper surface of the machine body (1), the fixed frame (2) is arranged around the mold plate (11), the scraping assembly for cleaning the edge of the mold plate (11) is slidably arranged on the fixed frame (2), the scraping assembly comprises a scraping block (23) abutting against the mold plate (11), and the metal residues on the edge of the mold plate (11) are scraped off; The scraping work is specifically as follows: Firstly, when the engine cylinder is pressure cast, the hydraulic cylinder (31) drives the sealing plate (3) to separate from the mold plate (11), the fixed connection between the mold plate (11) and the machine body (1) is released, the engine cylinder is separated from the mold plate (11), the mold plate (11) is reinstalled on the upper surface of the machine body (1), after the installation of the mold plate (11) is completed, the electric sliding table (22) on the upper surface of the fixed frame (2) is started, the electric sliding table (22) slides along the fixed guide rail (21) formed on the surface of the fixed frame (2), the electric sliding table (22) slides while driving the scraping block (23) rotatably arranged on one side of the electric sliding table (22), the scraping block (23) abuts against the upper surface of the mold plate (11), and the metal residues on the surface of the mold plate (11) are scraped off along with the sliding of the electric sliding table (22); During the cleaning process of the edge of the mold plate (11) by the scraping block (23) along with the electric sliding table (22), since the fixed pipe (13) abutting against the sealing plate (3) is arranged on the surface of the mold plate (11), when the scraping block (23) abuts against the fixed pipe (13), the reaction force of the fixed pipe (13) on the scraping block (23) makes the scraping block (23) rotate around the rotating shaft (24), and after the scraping block (23) rotates past one of the fixed pipes (13), the scraping block (23) is reset under the resetting force of the torsional spring (25) to scrape and clean the surface of the mold plate (11) again; During the scraping work of the surface of the mold plate (11) by the scraping block (23), the coating roller (211) in the scraping block (23) works synchronously to coat the surface of the mold plate (11) with a release agent.

2. A process for preparing a cylinder block of an HCCI-based engine according to claim 1, characterized in that: In step two, the hydraulic cylinder (31) on the top wall of the machine body (1) is activated. The hydraulic cylinder (31) drives the sealing plate (3) at its output end to move toward the mold plate (11). When the fixing tube (13) on the surface of the mold plate (11) is inserted into the insertion hole (33) on the lower surface of the sealing plate (3), the insertion post (32) on the lower surface of the sealing plate (3) will also be inserted into the fixing hole (14) in the fixing tube (13). In addition, the two insertion plates (34) on the lower surface of the sealing plate (3) are simultaneously inserted into the slot (12) inside the mold plate (11). At this time, the sealing die casting of the engine cylinder is completed.

3. A process for preparing a cylinder block of an HCCI-based engine as claimed in claim 1, wherein: The coating roller (211) works as follows: when the scraper (23) comes into contact with the mold plate (11), the connecting frame (28) inside the scraper (23) is squeezed into the fixed cavity (26) by the mold plate (11). At this time, the fixed grooves (29) on both sides of the connecting frame (28) are aligned with the connecting grooves (212) on both sides of the inner wall of the fixed cavity (26). The release agent inside the scraper (23) flows into the positioning cavity (210) inside the connecting frame (28) and wets the coating roller (211). After the scraper (23) scrapes off the work, the coating roller (211) immediately performs the coating work. In addition, when it encounters the fixed tube (13), the pressure spring (27) causes the connecting groove (212) and the fixed groove (29) to be misaligned under the action of the restoring force. At this time, the release agent does not penetrate into the positioning cavity (210).

4. A process for preparing a cylinder block of an HCCI-based engine according to claim 3, characterized in that: While the scraper (23) is scraping, two cleaning rollers (213) on one side of the scraper (23) come into contact with the outer wall of the mold plate (11). The cleaning rollers (213) and the scraper (23) work synchronously to clean the metal residue on the outer wall of the mold plate (11).

5. A process for preparing a cylinder block of an HCCI-based engine according to claim 4, characterized in that: After the scraper (23), coating roller (211) and cleaning roller (213) have completed the scraping and coating work, the limiting shaft (217) in the rotating groove (216) on one side of the electric slide (22) is started. The rotation of the limiting shaft (217) pulls the steel wire between the scraper (23) and the steel wire is fixed to the connecting ring (214) on one side of the scraper (23), and the scraper (23) is put into the receiving groove (215). Then the engine cylinder block is cast again.

6. An HCCI-based engine cylinder characterized by: It is obtained by the preparation process described in any one of claims 1-5.

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