Aluminum alloy casting structure of heavy truck compressor box body
By setting up cold iron and casting core head extensions in the casting structure, the problems of severe shrinkage of thermal sections and defects in the box parts of the heavy truck compressor are solved, and high-quality casting effect is achieved.
Patent Information
- Application Number
- CN202420176581.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-24
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-01-24
AI Technical Summary
The existing casting structure is difficult to meet the high-quality casting of heavy truck compressor case parts, especially in large areas with severe shrinkage and shrinkage in the inner cavity ears and bottom flanges.
By setting up cold iron and casting core head lengths, the mold structure and casting process are optimized to ensure the consistent temperature field at the heat joints, there is no shrinkage at the bottom flange and inner cavity ears, and the breathability of the sand core is improved.
The quality of the heat joint shrinkage holes is significantly improved, ensuring that there is no shrinkage in the bottom flange and inner cavity ears is not reflected, and the overall quality of the finished parts is improved.
Smart Images
Figure CN222569201U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of casting, in particular to an aluminum alloy casting structure of a heavy truck compressor case. Background Art
[0002] "Casting" is an economical and convenient metal forming process. Casting has a wide range of applications and is not limited by the size, thickness and complexity of parts. It has high dimensional accuracy and can produce various alloy castings at low cost. With the global demand for lightweight automobiles and aluminum alloy parts increasing dramatically, the quality requirements for parts are becoming more stringent, and it is particularly important to improve the quality of aluminum alloy parts.
[0003] like Figure 1 As shown in the figure, there is a left box part of a heavy truck compressor QXAC0.3P12DC001-003, which is 215mm high, 255mm wide, 205mm thick, 13.7mm thick, weighs 6.9 kg, and is hollow in the middle (sand core is required). During casting, the part has severe shrinkage in the thick and hot spots, especially inside the bottom flange. In addition, the ear part of the inner cavity also shrinks severely. There are shrinkage holes at the sand core head position at the water inlet riser. The existing casting structure is difficult to meet the high-quality casting requirements of the left box part. Utility Model Content
[0004] The utility model aims to solve the problem that the existing casting structure in the background technology is difficult to meet the high-quality casting of left box parts, and proposes an aluminum alloy casting structure for a heavy truck compressor box.
[0005] The technical scheme of the utility model is as follows: an aluminum alloy casting structure for a heavy truck compressor housing, comprising a casting part and a mold for casting the part; two through holes of different sizes are formed on the part, and the positions where the two through holes are close to each other are inner cavity ears, and two bottom flanges are formed at the bottom of the part, and the positions at the roots of the inner cavity ears and the bottom flanges are the hot spots of the sand core; it also includes a mold cavity located in the mold and forming an opening on the side of the mold, a sand core arranged in the mold cavity, a plurality of chillers arranged at the hot spots of the outer wall of the sand core, and a casting port core head extension piece on the sand core at the casting port position;
[0006] The part is formed between the mold cavity and the sand core, and after forming, the casting mouth core head extension piece fits through the through hole.
[0007] Preferably, the chill is an aluminum alloy chill.
[0008] Preferably, the mold includes a fixing mechanism a and a fixing mechanism b arranged on a tilting casting machine, an upper mold and a lower mold respectively arranged on the fixing mechanism a and the fixing mechanism b, a water inlet riser arranged on the lower mold for liquid metal to flow into the mold cavity, and a ladle arranged on the lower mold for holding the liquid metal; the upper mold and the lower mold cooperate with each other to form a mold cavity; the water inlet riser is located in the ladle.
[0009] Preferably, an ejection mechanism a and an ejection mechanism b are respectively provided on the upper die and the lower die.
[0010] Preferably, the height of the casting port core head extension piece is ten millimeters to raise the position of the casting port core head.
[0011] Compared with the prior art, the utility model has the following beneficial technical effects: by setting the chiller and the casting mouth core head extension piece, the casting effect is better, and the original hot node shrinkage hole position is greatly improved. Specifically, the setting of the chiller makes the temperature field at the hot node consistent with the surroundings, so that there is no shrinkage phenomenon on the inner wall at the root of the bottom flange. The setting of the casting mouth core head extension piece increases the height of the casting mouth core head, increases the air permeability of the sand core and the gas precipitation transfer position, so that there is no shrinkage phenomenon at the position of the inner cavity ear. The final finished parts have good quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is the structural diagram of the left box parts;
[0013] Figure 2 It is a structural schematic diagram of a casting mold;
[0014] Figure 3 It is a structural schematic diagram of the sand core;
[0015] Figure 4 for Figure 3 axonometric drawing;
[0016] Figure 5 Schematic diagram of casting.
[0017] Figure numerals: 1. part; 2. inner cavity ear; 3. bottom flange; 4. through hole; 5. fixing mechanism a; 6. ejection mechanism a; 7. fixing mechanism b; 8. ejection mechanism b; 9. upper mold; 10. lower mold; 11. mold cavity; 12. water inlet riser; 13. ladle; 14. sand core; 15. chill; 16. casting core head extension. DETAILED DESCRIPTION
[0018] Embodiment 1
[0019] like Figure 1-Figure 5As shown, the utility model proposes an aluminum alloy casting structure for a heavy truck compressor housing, comprising a cast part 1 and a mold for casting the part 1; two through holes 4 of different sizes are formed on the part 1, and the positions where the two through holes 4 are close to each other are inner cavity ears 2, and two bottom flanges 3 are formed at the bottom of the part 1, and the root positions of the inner cavity ears 2 and the bottom flanges 3 are the hot spots of the sand core; it also includes a mold cavity 11 located in the mold and forming an opening on the side of the mold, a sand core 14 arranged in the mold cavity 11, a plurality of chillers 15 arranged at the hot spots of the outer wall of the sand core 14, and a casting port core head extension 16 on the sand core 14 at the casting port position;
[0020] The part 1 is formed between the mold cavity 11 and the sand core 14. After forming, the casting mouth core head extension piece 16 fits through the through hole 4; the chiller 15 is an aluminum alloy chiller; the casting mouth core head extension piece 16 is ten millimeters high to raise the casting mouth core head position.
[0021] In this embodiment, the tilting casting time is 8-15s, the casting temperature is 690°-710°, the solidification time is 240s-340s, the mold casting temperature is ≥220°, and the casting method is tilting riser water inlet direct casting. By setting the chiller 15 and the casting mouth core head extension 16, the casting effect is good, and the original hot node shrinkage hole position is greatly improved. Specifically, the setting of the chiller 15 makes the temperature field at the hot node consistent with the surrounding, so that there is no shrinkage phenomenon on the inner wall at the root of the bottom flange 3. The casting mouth core head extension 16 is set to increase the height of the casting mouth core head by 10mm, increase the air permeability of the sand core 14 and the gas precipitation transfer position, so that there is no shrinkage phenomenon at the position of the inner cavity ear 2, and there is no shrinkage hole at the sand core head position at the water inlet riser 12. The final finished part 1 has good quality.
[0022] Embodiment 2
[0023] like Figure 2 and Figure 5 As shown, the aluminum alloy casting structure of a heavy truck compressor housing proposed by the utility model, compared with the first embodiment, the mold includes a fixing mechanism a5 and a fixing mechanism b7 arranged on a tilting casting machine, an upper mold 9 and a lower mold 10 respectively arranged on the fixing mechanism a5 and the fixing mechanism b7, a water inlet riser 12 arranged on the lower mold 10 for liquid metal to flow into the mold cavity 11, and a ladle 13 arranged on the lower mold 10 for holding liquid metal; the upper mold 9 and the lower mold 10 cooperate with each other to form the mold cavity 11; the water inlet riser 12 is located in the ladle 13. Ejection mechanisms a6 and b8 are respectively arranged on the upper mold 9 and the lower mold 10.
[0024] In this embodiment, during casting, the liquid metal is poured into the ladle 13, and then the upper mold 9 and the lower mold 10 are slowly turned over by the tilting casting machine, and the liquid metal is gradually introduced into the mold cavity 11 through the water inlet riser 12. The liquid metal is cooled between the mold cavity 11 and the sand core 14 to form the part 1, and then the upper mold 9 and the lower mold 10 are separated, and the part 1 and the sand core 14 are ejected by the ejection mechanism a6 and the ejection mechanism b8 to take out the part 1. The tilting casting time is 8-15s, the casting temperature is 690°-710°, the solidification time is 240s-340s, the mold casting temperature is ≥220°, and the casting method is tilting riser water inlet direct casting.
[0025] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.
Claims
1. A heavy truck compressor housing aluminum alloy casting structure, comprising a cast part (1) and a mold for casting the part (1); two through holes (4) of different sizes are formed on the part (1), and the positions where the two through holes (4) are close to each other are inner cavity ears (2); two bottom flanges (3) are formed at the bottom of the part (1), and the root positions of the inner cavity ears (2) and the bottom flange (3) are the hot spots of the sand core; characterized in that: It also includes a mold cavity (11) located in the mold and forming an opening on the side of the mold, a sand core (14) arranged in the mold cavity (11), a plurality of cold irons (15) arranged at the hot node of the outer wall of the sand core (14), and a casting port core head extension piece (16) on the sand core (14) at the casting port position; The part (1) is formed between the mold cavity (11) and the sand core (14), and after forming, the casting port core head extension piece (16) fits through the through hole (4).
2. The heavy truck compressor housing aluminum alloy casting structure according to claim 1 is characterized in that: The cold iron (15) is an aluminum alloy cold iron.
3. The heavy truck compressor housing aluminum alloy casting structure according to claim 1 is characterized in that: The mold comprises a fixing mechanism a (5) and a fixing mechanism b (7) arranged on a tilting casting machine, an upper mold (9) and a lower mold (10) respectively arranged on the fixing mechanism a (5) and the fixing mechanism b (7), a water inlet riser (12) arranged on the lower mold (10) for liquid metal to flow into a mold cavity (11), and a ladle (13) arranged on the lower mold (10) for containing the liquid metal; the upper mold (9) and the lower mold (10) cooperate with each other to form a mold cavity (11); the water inlet riser (12) is located in the ladle (13).
4. The heavy truck compressor case aluminum alloy casting structure according to claim 3 is characterized in that: An ejection mechanism a (6) and an ejection mechanism b (8) are respectively arranged on the upper die (9) and the lower die (10).
5. The heavy truck compressor case aluminum alloy casting structure according to claim 1 is characterized in that: The height of the casting port core head extension piece (16) is ten millimeters to raise the casting port core head position.