High-precision positioning mechanism for aluminum alloy insert casting mold

Abstract

The utility model provides a kind of high-precision positioning mechanism of aluminium alloy die-casting die with insert, belong to mould technical field.It includes lower mould plate, the lower mould plate is provided with two installation annular iron insert's forming cavity, the lower mould plate is provided with high-precision positioning assembly corresponding with annular iron insert, the lower mould plate is also equipped with wind-water cooling combined type cooling runner structure.High-precision positioning assembly can be accurately positioned annular iron insert by being set, improve insert installation precision, avoid die-casting size out-of-tolerance and combination bad;With wind-water cooling combined type cooling runner structure, the speed of expansion and contraction of aluminium iron can be comprehensively prevented insert skin aluminium shell fracture, guarantee product performance and reliability.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a high-precision positioning mechanism for aluminum alloy die-casting molds with inserts. Background Technology

[0002] Traditional aluminum alloy die-casting molds have significant shortcomings in insert positioning. Ordinary positioning mechanisms are insufficient to meet the high-precision positioning requirements. Insert positioning deviations often lead to out-of-tolerance dimensional accuracy of the die-cast parts and poor bonding between the insert and the aluminum alloy matrix, seriously affecting product performance and reliability. At the same time, due to the special structure of the iron insert, that is, the integral die-cast part is an aluminum-encased iron insert, there is a risk that the outer aluminum shell of the insert may break during cooling because the expansion and contraction rates of aluminum and iron are inconsistent. Therefore, it is necessary to design a cooling structure that can take into account the expansion and contraction rates of aluminum and iron.

[0003] For example, a Chinese patent discloses a horizontal cold-pressing chamber aluminum alloy die-casting mold [application number: 201621065864.2], which has a rare earth permanent magnet fixing device and a circulating water cooling system. The aluminum alloy body and the circular thin-plate iron insert are formed in one die-casting process, which improves production efficiency and yield, reduces manufacturing costs and energy consumption. The aluminum alloy body and the circular thin-plate iron insert are tightly bonded and will not have quality problems such as separation or cracking. This improves the production efficiency and product quality of aluminum alloy die-cast parts with large, direct circular thin-plate iron inserts. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned problems by providing a high-precision positioning mechanism for aluminum alloy die-casting molds with inserts.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-precision positioning mechanism for an aluminum alloy die-casting mold with inserts includes a lower template. The lower template has two forming cavities on which annular iron inserts are installed. The lower template is provided with a high-precision positioning component corresponding to the annular iron inserts. The lower template is also provided with a combined air-cooling and water-cooling channel structure.

[0007] In the above-mentioned high-precision positioning mechanism for aluminum alloy die-casting mold with inserts, the high-precision positioning component includes a positioning pin, the top of which protrudes from the bottom surface of the forming cavity, and the protruding part of the top of the positioning pin has an inner conical positioning surface that is adapted to the inner circumferential surface of the annular iron insert.

[0008] In the above-mentioned high-precision positioning mechanism for aluminum alloy die-casting mold with inserts, the inner circumferential surface of the annular iron insert has annular guide cone surfaces on its upper and lower sides, and the inner diameter of the guide cone surfaces gradually increases from the inside to the outside.

[0009] In the aforementioned high-precision positioning mechanism for aluminum alloy die-casting molds with inserts, the annular iron insert and the top of the positioning pin are interference-fitted.

[0010] In the above-mentioned high-precision positioning mechanism for aluminum alloy die-casting mold with inserts, the positioning pin is detachably set in the positioning pin mounting groove in the lower template. The diameter of the middle part of the positioning pin is larger than the diameter of the top part of the positioning pin. The bottom end of the positioning pin has a limiting part, and the inner end of the limiting part abuts against the limiting step at the bottom of the positioning pin mounting groove.

[0011] In the aforementioned high-precision positioning mechanism for aluminum alloy die-casting molds with inserts, the air-cooled and water-cooled combined cooling channel structure includes an air-cooled channel structure disposed within the lower template and a water-cooled channel structure disposed at the connection between the positioning pin and the annular iron insert.

[0012] In the aforementioned high-precision positioning mechanism for aluminum alloy die-casting molds with inserts, the air-cooled flow channel structure includes several air-cooled flow channels disposed on the lower template and located on the lower side of the forming cavity.

[0013] In the aforementioned high-precision positioning mechanism for aluminum alloy die-casting molds with inserts, the water-cooled flow channel structure includes an annular cooling flow channel located at the top of the positioning pin.

[0014] In the aforementioned high-precision positioning mechanism for aluminum alloy die-casting molds with inserts, the positioning pin has two inlet and outlet ports connected to an annular cooling channel in the middle, and the inlet and outlet ports are connected to a water-cooling channel set on the lower template.

[0015] In the aforementioned high-precision positioning mechanism for aluminum alloy die-casting molds with inserts, the annular iron insert has several reinforcing connecting grooves with annular cross-sections on its circumferential surface.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. By setting up high-precision positioning components, the annular iron insert can be accurately positioned, improving the installation accuracy of the insert and avoiding dimensional deviations and poor fit of the die-cast parts; by combining the cooling channel structure with air and water cooling, the thermal expansion and contraction rates of aluminum and iron can be integrated, effectively preventing the aluminum shell of the insert from breaking, and ensuring product performance and reliability.

[0018] 2. The high-precision positioning component uses a positioning pin, whose inner conical positioning surface at the top matches the inner circumferential surface of the annular iron insert. Through the unique conical surface fit, the positioning accuracy is enhanced, and it can provide uniform positioning force in multiple directions, which plays a good constraining role on the insert, effectively reducing the positioning deviation of the insert, ensuring the forming accuracy of the die-casting part, and improving product quality.

[0019] 3. The combined air-cooled and water-cooled cooling channel structure consists of an air-cooled channel structure and a water-cooled channel structure. Since aluminum has a higher thermal conductivity than iron, aluminum expands and contracts faster during cooling than iron. The air-cooled channel structure cools the aluminum alloy parts inside the mold as a whole, while the water-cooled channel structure precisely cools the connection between the locating pin and the annular iron insert. The two work together to effectively balance the difference in thermal expansion and contraction between aluminum and iron, prevent the aluminum shell of the insert from breaking, and extend the service life of the mold.

[0020] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a sectional view of the lower template;

[0023] Figure 3 This is a structural diagram of a locating pin;

[0024] Figure 4 yes Figure 2 Enlarged diagram of point A in the middle.

[0025] In the figure, the components are: 1. Lower template; 2. Annular iron insert; 3. Molding cavity; 4. High-precision positioning component; 5. Positioning pin; 6. Inner conical positioning surface; 7. Guide cone surface; 8. Positioning pin mounting groove; 9. Limiting part; 10. Limiting step; 11. Air-cooled flow channel structure; 12. Water-cooled flow channel structure; 13. Air-cooled flow channel; 14. Annular cooling flow channel; 15. Liquid inlet and outlet; 16. Water-cooled flow channel; 17. Reinforcing connecting groove. Detailed Implementation

[0026] like Figures 1-4 As shown, a high-precision positioning mechanism for an aluminum alloy die-casting mold with inserts includes a lower template 1. The lower template 1 is provided with two forming cavities 3 on which annular iron inserts 2 are installed. The lower template 1 is provided with a high-precision positioning component 4 corresponding to the annular iron inserts 2. The lower template 1 is also provided with a combined air-cooled and water-cooled cooling channel structure.

[0027] In this invention, the ring-shaped iron insert can be accurately positioned by setting a high-precision positioning component, thereby improving the installation accuracy of the insert and avoiding dimensional deviations and poor bonding of the die-cast parts. By combining the cooling channel structure with air and water cooling, the thermal expansion and contraction rates of aluminum and iron can be integrated, effectively preventing the aluminum shell of the insert from breaking and ensuring product performance and reliability.

[0028] Specifically, the high-precision positioning component 4 includes a positioning pin 5. The top of the positioning pin 5 protrudes from the bottom surface of the forming cavity 3, and the protruding part of the top of the positioning pin 5 has an inner conical positioning surface 6 that matches the inner circumferential surface of the annular iron insert 2. The high-precision positioning component uses a positioning pin, whose top inner conical positioning surface matches the inner circumferential surface of the annular iron insert. Through the unique conical surface fit, the positioning accuracy is enhanced, and a uniform positioning force can be provided in multiple directions, which plays a good constraining role on the insert, effectively reducing the positioning deviation of the insert, ensuring the forming accuracy of the die-cast part, and improving product quality.

[0029] Specifically, the annular iron insert 2 has annular guide cone surfaces 7 on its upper and lower sides of its inner circumferential surface, and the inner diameter of the guide cone surfaces 7 gradually increases from the inside to the outside. The guide cone surfaces on the upper and lower sides of the annular iron insert's inner circumferential surface, with the inner diameter gradually increasing from the inside to the outside, provide guidance for insert installation, making installation more convenient and efficient, while also helping to improve positioning accuracy and reduce the risk of insert misalignment during installation.

[0030] Specifically, the annular iron insert 2 and the locating pin 5 are interference-fitted at their top ends. The interference fit between the annular iron insert and the locating pin top ends forms a tight connection, further enhancing the stability of the insert's positioning, preventing displacement of the insert during the die-casting process, and ensuring the dimensional accuracy and molding quality of the die-cast part.

[0031] Specifically, the positioning pin 5 is detachably installed in the positioning pin mounting groove 8 within the lower template 1. The diameter of the middle part of the positioning pin 5 is larger than the diameter of the top part of the positioning pin 5. The bottom end of the positioning pin 5 has a limiting part 9, the inner end of which abuts against the limiting step 10 at the bottom of the positioning pin mounting groove 8. The detachable installation of the positioning pin within the lower template, the difference in diameter between the middle and top parts, and the fit between the limiting part and the limiting step facilitate the installation, disassembly, and replacement of the positioning pin, making mold maintenance convenient. Simultaneously, it ensures that the positioning pin remains fixed in position during use, maintaining a high-precision positioning effect.

[0032] Specifically, the combined air-cooled and water-cooled cooling channel structure includes an air-cooled channel structure 11 disposed within the lower mold plate 1 and a water-cooled channel structure 12 disposed at the connection between the positioning pin 5 and the annular iron insert 2. The combined air-cooled and water-cooled cooling channel structure consists of an air-cooled channel structure and a water-cooled channel structure. Because aluminum has a higher thermal conductivity than iron, its thermal expansion and contraction rate during cooling is greater than that of iron. The air-cooled channel structure cools the aluminum alloy portion of the mold as a whole, while the water-cooled channel structure precisely cools the connection between the positioning pin and the annular iron insert. The two structures work together to effectively balance the difference in thermal expansion and contraction between aluminum and iron, preventing breakage of the aluminum shell of the insert and extending the mold's service life.

[0033] Specifically, the air-cooled runner structure 11 includes several air-cooled runners 13 disposed on the lower mold plate 1 and located below the molding cavity 3. In the air-cooled runner structure, multiple air-cooled runners are disposed below the molding cavity to increase the cooling area, improve cooling efficiency, quickly reduce the mold temperature, ensure the stability of the die-casting process, and reduce product defects caused by excessively high mold temperature.

[0034] Specifically, the water-cooled flow channel structure 12 includes an annular cooling flow channel 14 disposed at the top of the positioning pin 5. The water-cooled flow channel structure uses the annular cooling flow channel at the top of the positioning pin to provide targeted cooling at the connection between the positioning pin and the annular iron insert, precisely controlling the local temperature and increasing the expansion and contraction speed of the annular iron insert to match the expansion and contraction speed of the annular iron insert with that of aluminum, preventing cracks in the outer aluminum shell of the insert due to temperature changes.

[0035] Specifically, the positioning pin 5 has two inlet and outlet ports 15 connected to the annular cooling channel 14 in the middle. The inlet and outlet ports 15 are connected to the water-cooling channel 16 on the lower mold plate 1. The inlet and outlet ports in the middle of the positioning pin are connected to the annular cooling channel and the water-cooling channel of the lower mold plate to form a complete water-cooling circulation system, ensuring smooth circulation of coolant, continuously removing heat, improving the water-cooling effect, stabilizing and controlling the local temperature of the mold, and ensuring the quality of the die-cast products.

[0036] Specifically, the annular iron insert 2 has several reinforcing connecting grooves 17 with annular cross-sections on its circumferential surface. The reinforcing connecting grooves on the circumferential surface of the annular iron insert increase the contact area between the iron insert and the aluminum alloy substrate, improve the bonding strength between the two, effectively prevent the insert from separating from the aluminum alloy substrate, enhance the overall structural stability of the die-cast part, and improve product reliability.

[0037] The working principle of this utility model is as follows: by setting a high-precision positioning component, the annular iron insert can be accurately positioned, improving the installation accuracy of the insert and avoiding dimensional deviations and poor bonding of the die-cast parts; by combining the cooling channel structure with air and water cooling, the thermal expansion and contraction rates of aluminum and iron can be integrated, effectively preventing the aluminum shell of the insert from breaking, and ensuring product performance and reliability.

[0038] The high-precision positioning component uses a positioning pin, whose inner conical positioning surface at the top matches the inner circumferential surface of the annular iron insert. This unique conical fit enhances positioning accuracy and provides uniform positioning force in multiple directions, effectively constraining the insert, reducing positioning deviation, ensuring die-casting precision, and improving product quality. Guide conical surfaces are provided on the upper and lower sides of the annular iron insert's inner circumferential surface, with the inner diameter gradually increasing from the inside to the outside. This design provides guidance for insert installation, making installation more convenient and efficient, while also improving positioning accuracy and reducing the risk of insert displacement during installation. The annular iron insert and the top of the positioning pin have an interference fit, forming a tight connection, further enhancing the stability of the insert positioning, preventing displacement during die-casting, and ensuring dimensional accuracy and forming quality of the die-cast part. The positioning pin is detachably installed in the lower mold plate. The difference in diameter between the middle and top parts, and the fit between the limiting part and the limiting step, facilitate the installation, disassembly, and replacement of the positioning pin, making mold maintenance convenient. This also ensures that the positioning pin remains fixed during use, maintaining high-precision positioning.

[0039] The combined air-cooled and water-cooled cooling channel structure consists of an air-cooled channel structure and a water-cooled channel structure. Because aluminum has a higher thermal conductivity than iron, its thermal expansion and contraction rate is greater during cooling. The air-cooled channel structure cools the aluminum alloy portion of the mold as a whole, while the water-cooled channel structure precisely cools the connection between the locating pin and the annular iron insert. The two work synergistically to effectively balance the thermal expansion and contraction difference between aluminum and iron, preventing breakage of the aluminum shell of the insert and extending the mold's lifespan. In the air-cooled channel structure, multiple air-cooled channels are located on the lower side of the molding cavity, increasing the cooling area, improving cooling efficiency, and rapidly reducing the mold temperature. This ensures stability during the die-casting process and reduces product defects caused by excessively high mold temperatures. The water-cooled channel structure uses an annular cooling channel at the top of the locating pin to cool the locating pin... Targeted cooling is applied at the connection point with the annular iron insert to precisely control the local temperature. This increases the expansion and contraction speed of the annular iron insert to match the expansion and contraction speed of the aluminum, preventing cracks in the outer aluminum shell of the insert due to temperature changes. The inlet and outlet ports in the middle of the positioning pin are connected to the annular cooling channel and the lower mold water cooling channel, forming a complete water cooling circulation system. This ensures smooth circulation of coolant, continuously removes heat, improves the water cooling effect, stabilizes the local temperature of the mold, and guarantees the quality of the die-cast products. Reinforcing connection grooves are set on the circumferential surface of the annular iron insert to increase the contact area between the iron insert and the aluminum alloy substrate, improve the bonding strength between the two, effectively prevent the insert from separating from the aluminum alloy substrate, enhance the overall structural stability of the die-cast part, and improve product reliability.

[0040] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0041] Although this article frequently uses terms such as lower template 1, annular iron insert 2, forming cavity 3, high-precision positioning component 4, positioning pin 5, inner conical positioning surface 6, guide cone surface 7, positioning pin mounting groove 8, limiting part 9, limiting step 10, air-cooled flow channel structure 11, water-cooled flow channel structure 12, air-cooled flow channel 13, annular cooling flow channel 14, liquid inlet / outlet 15, water-cooled flow channel 16, and reinforcing connecting groove 17, these terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any kind of additional limitation would be contrary to the spirit of this utility model.

Claims

1. A high-precision positioning mechanism for an aluminum alloy die-casting mold with inserts, comprising a lower template (1), characterized in that, The lower template (1) is provided with two forming cavities (3) on which annular iron inserts (2) are installed. The lower template (1) is provided with a high-precision positioning component (4) corresponding to the annular iron inserts (2). The lower template (1) is also provided with a combined air-water cooling channel structure.

2. The high-precision positioning mechanism for aluminum alloy die-casting molds with inserts according to claim 1, characterized in that, The high-precision positioning component (4) includes a positioning pin (5), the top of which protrudes from the bottom surface of the forming cavity (3) and the protruding part of the top of the positioning pin (5) has an inner conical positioning surface (6) that is adapted to the inner circumferential surface of the annular iron insert (2).

3. The high-precision positioning mechanism for aluminum alloy die-casting molds with inserts according to claim 2, characterized in that, The inner circumferential surface of the annular iron insert (2) has annular guide cone surfaces (7) on its upper and lower sides, and the inner diameter of the guide cone surfaces (7) gradually increases from the inside to the outside.

4. The high-precision positioning mechanism for aluminum alloy die-casting molds with inserts according to claim 3, characterized in that, The annular iron insert (2) and the locating pin (5) are interference-fitted at their top ends.

5. The high-precision positioning mechanism for aluminum alloy die-casting molds with inserts according to claim 4, characterized in that, The positioning pin (5) is detachably installed in the positioning pin mounting groove (8) in the lower template (1). The diameter of the middle part of the positioning pin (5) is greater than the diameter of the top part of the positioning pin (5). The bottom end of the positioning pin (5) has a limiting part (9). The inner end of the limiting part (9) abuts against the limiting step (10) at the bottom of the positioning pin mounting groove (8).

6. The high-precision positioning mechanism for aluminum alloy die-casting molds with inserts according to claim 2, characterized in that, The air-cooled and water-cooled combined cooling channel structure includes an air-cooled channel structure (11) set in the lower template (1) and a water-cooled channel structure (12) set at the connection between the positioning pin (5) and the annular iron insert (2).

7. The high-precision positioning mechanism for aluminum alloy die-casting molds with inserts according to claim 6, characterized in that, The air-cooled flow channel structure (11) includes several air-cooled flow channels (13) arranged on the lower template (1) and located on the lower side of the molding cavity (3).

8. The high-precision positioning mechanism for aluminum alloy die-casting molds with inserts according to claim 7, characterized in that, The water-cooled flow channel structure (12) includes an annular cooling flow channel (14) disposed at the top of the positioning pin (5).

9. The high-precision positioning mechanism for aluminum alloy die-casting molds with inserts according to claim 8, characterized in that, The positioning pin (5) has two liquid inlet and outlet ports (15) in the middle that are connected to the annular cooling channel (14), and the liquid inlet and outlet ports (15) are connected to the water cooling channel (16) set on the lower template (1).

10. The high-precision positioning mechanism for aluminum alloy die-casting molds with inserts according to claim 1, characterized in that, The annular iron insert (2) has several reinforcing connecting grooves (17) with annular cross-sections on its circumferential surface.

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