A split mold for casting a lock ring and a method of casting a lock ring

Abstract

The application relates to a lock ring casting mold and a lock ring casting method. The application comprises a bottom mold, a top mold arranged on the upper side of the bottom mold, and a side mold arranged on the circumferential side of the bottom mold and the top mold and forming a double-lock-ring forming cavity with the bottom mold and the top mold, the double-lock-ring forming cavity comprising two lock rings integrally formed in upper and lower positions; wherein a flow distribution cone is arranged at the center of the upper end of the bottom mold and in the forming cavity; the top mold is provided with a center riser matched with the flow distribution cone and a center exhaust port communicated with the center riser, and the bottom end of the top mold is further provided with a bottom exhaust port; one side of the side mold is provided with a hidden riser located at the side end of the forming cavity, a filtering channel communicated with the hidden riser, and an upper end exhaust port communicated with the hidden riser. The application casts the lock ring by adopting a single-face double-cavity water mist cooling casting mode, improves the quality of the lock ring, and improves the process stability, production efficiency and reduces the manufacturing cost.

Description

Technical Field

[0001] This invention relates to the field of wheel hub manufacturing technology, and in particular to a mold for casting a locking ring and a method for casting a locking ring. Background Technology

[0002] Currently, the production process for aluminum alloy automotive wheels involves melting A356 aluminum, manufacturing castings using traditional low-pressure or gravity casting techniques, followed by steps such as riser cutting, center cutting, heat treatment, machining, and painting. Forged aluminum T6061 is used, and the locking rings are manufactured through CNC milling, machining, and painting. Due to the high performance requirements of the locking rings, forged aluminum T6061 is used, which is more than twice as expensive as ordinary aluminum alloys. Furthermore, the single-piece machining process using milling is time-consuming, inefficient, and has a high overall production cost, resulting in weak market competitiveness. Summary of the Invention

[0003] Therefore, the present invention provides a mold for casting lock rings and a method for casting lock rings. By using a single-sided double-cavity water mist cooling casting method to cast lock rings, the quality of lock rings is improved, and the process stability and production efficiency are high, while the manufacturing cost is reduced.

[0004] To solve the above-mentioned technical problems, the present invention provides a mold for casting a lock ring, comprising:

[0005] Bottom mold;

[0006] Top mold, the top mold being disposed on the upper side of the bottom mold; and

[0007] The side mold is located on the periphery of the bottom mold and the top mold, and forms a double-locking ring forming cavity with the bottom mold and the top mold. The double-locking ring includes two integrally formed upper and lower locking rings, including locking ring A and locking ring B. Both locking ring A and locking ring B include locking plate steps and locking holes. Locking ring B also includes a positioning wheel lip.

[0008] A flow divider cone is provided at the center of the upper end of the bottom mold and within the molding cavity;

[0009] The top mold is provided with a central riser that mates with the flow divider cone and a central vent that communicates with the central riser; the bottom end of the top mold is also provided with a bottom vent.

[0010] The side mold is provided with a hidden cap located at the side end of the molding cavity, a filter channel communicating with the hidden cap, and an upper exhaust port communicating with the hidden cap.

[0011] In one embodiment of the present invention, the top mold is provided with a plurality of top mold riser cooling points and top mold inlet cooling points, the bottom mold is provided with a small ring cooling structure, a central cooling structure, and a plurality of bottom mold inlet cooling points and bottom mold rounded corner cooling points, and the side mold is provided with a side mold inlet cooling point.

[0012] In one embodiment of the present invention, the bottom exhaust ports are evenly distributed in a circumferential direction, and the bottom end of the bottom exhaust ports is connected to honeycomb ventilation particles by an interference fit.

[0013] In one embodiment of the present invention, the diameter of the central exhaust port is 10-45 mm.

[0014] In one embodiment of the present invention, an inlet section in the shape of a funnel and connected to the filter channel is further included. The upper end of the inlet section protrudes from the upper end face of the side mold. The filter channel is cylindrical and a cylindrical filter screen is provided inside the filter channel.

[0015] In one embodiment of the present invention, the filter screen is a 16-20 mesh fiber screen that has been heated and degummed, and the overall diameter of the filter screen is 30-50 mm.

[0016] In one embodiment of the present invention, the molding cavity includes a cap-shaped shrinkage channel disposed between the top mold and the side mold and located above the top of the double locking ring. The width of the cap-shaped shrinkage channel is 1.7-2.5 times larger than the width of the locking ring, and the height of the cap-shaped shrinkage channel is 3-5 times larger than the height of the locking ring.

[0017] The present invention also provides a method for casting a lock ring, the method comprising:

[0018] S1. After melting the aluminum alloy at 680-720℃, molten aluminum is obtained. Argon gas is introduced into the molten aluminum to remove gas, so that the density of the molten aluminum is not less than 2.58 g / cm3.

[0019] S2. Use a robotic arm to control the ladle to take soup. First, detect the height of the aluminum liquid level at the bottom of the ladle. Then, push the oxide scale on the surface of the aluminum liquid to the far end of the soup taking operation by the robotic arm.

[0020] S3. Using a robotic arm, pour the molten aluminum from the ladle into the inlet section according to the prefabricated path. After pouring, rotate the ladle 180 degrees using the robotic arm, and then use the robotic arm to pour out the aluminum sheet remaining on the outer wall of the ladle.

[0021] S4. After passing through the filter screen and the dark cap, the aluminum liquid enters the forming cavity for solidification. It is then cooled by water mist through the central cooling structure, the small ring cooling structure, the bottom mold inlet cooling point, the upper mold inlet cooling point, the side mold inlet cooling point, the top mold riser cooling point, the top mold inlet cooling point, and the bottom mold rounded corner cooling point. The entire cooling cycle is 200-300 seconds.

[0022] S5. After cooling, a double locking ring is obtained in the forming cavity. The double locking ring is cut to obtain locking ring A and locking ring B. The middle connecting spokes of locking ring A and locking ring B are evenly distributed in 4-8 groups. The thickness of each group of middle connecting spokes is 6-12mm and the width is 15-50mm.

[0023] In one embodiment of the present invention, the purity of the argon gas is ≥99.99%, the ceramic rotor of the degassing device is continuously operated, the rotation speed setting range is 520±25 rpm / min, the pressure setting is 0.25-0.45MPa, and the flow rate is 2.5±0.5cm3 / h.

[0024] In one embodiment of the present invention, the double locking ring comprises upper and lower layers, and the front surfaces of the upper and lower locking rings are cooled by water mist through a central cooling structure, a small ring cooling structure, a bottom mold inlet cooling point, an upper mold inlet cooling point, a side mold inlet cooling point, a top mold riser cooling point, a top mold inlet cooling point, and a bottom mold rounded corner cooling point.

[0025] In one embodiment of the present invention, the aluminum alloy is selected from AlSi7Mg aluminum alloy.

[0026] The technical solution of the present invention has the following advantages compared with the prior art:

[0027] The present invention discloses a mold for casting a locking ring and a method for casting a locking ring. By setting a double-layered locking ring cavity inside the mold and setting multiple cooling holes on the mold, the temperature field of the mold can be easily adjusted. By using a single-sided double-cavity water mist cooling casting method to cast the locking ring, the quality of the locking ring is improved, and its process stability and production efficiency are high, while reducing manufacturing costs. Attached Figure Description

[0028] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0029] Figure 1 This is a schematic diagram of the mold structure for casting the locking ring according to the present invention.

[0030] Figure 2 This is a schematic diagram of the double-locking ring structure.

[0031] Figure 3This is a schematic diagram of the locking ring unit.

[0032] Explanation of reference numerals on the accompanying drawings:

[0033] 100. Locking ring A; 110. Locking ring B; 120. Positioning wheel lip; 130. Intermediate connecting spoke; 140. Cutting table; 150. Positioning hole;

[0034] 1. Bottom mold; 11. Diverter cone; 12. Small ring cooling structure; 13. Center cooling structure; 14. Bottom mold inlet cooling point; 15. Bottom mold rounded corner cooling point;

[0035] 2. Top mold; 21. Bottom vent; 211. Honeycomb venting particles; 22. Center riser; 23. Center vent; 24. Top mold riser cooling point; 25. Top mold inlet cooling point;

[0036] 3. Side mold; 31. Concealed vent; 322. Filter channel; 323. Inlet section; 324. Filter screen; 33. Upper vent; 34. Side mold inlet cooling point;

[0037] 4. Molding cavity; 41. Cap opening shrinkage channel. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0039] In this invention, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this invention, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0040] In this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc., are understood to exclude the stated number; "above," "below," "within," etc., are understood to include the stated number. In the description of this invention, the terms "first" and "second" are used only to distinguish technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0041] In this invention, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this invention based on the specific content of the technical solution.

[0042] Example 1

[0043] Reference Figures 1 to 3 As shown, a mold for casting a lock ring includes:

[0044] Bottom mold 1;

[0045] Top mold 2, the top mold 2 being disposed on the upper side of the bottom mold 1; and

[0046] Side mold 3 is disposed on the periphery of bottom mold 1 and top mold 2, and forms a double-locking ring forming cavity 4 between bottom mold 1 and top mold 2. The double-locking ring includes two integrally formed upper and lower locking rings, including locking ring A100 and locking ring B110. Both locking ring A100 and locking ring B110 include locking plate steps and locking holes. Locking ring B110 also includes a positioning wheel lip 120.

[0047] A flow divider cone 11 is provided at the center of the upper end of the bottom mold 1 and inside the molding cavity 4;

[0048] The top mold 2 is provided with a central riser 22 that is positioned and cooperates with the flow divider cone 11 and a central vent 23 that communicates with the central riser 22. The bottom end of the top mold 2 is also provided with a bottom vent 21.

[0049] The side mold 3 is provided with a hidden cap 31 located at the side end of the molding cavity 4, a filter channel 322 communicating with the hidden cap 31, and an upper exhaust port 33 communicating with the hidden cap 31.

[0050] Specifically, the top mold 2 is provided with multiple top mold riser cooling points 24 and top mold inlet cooling points 25, the bottom mold 1 is provided with a small ring cooling structure 12, a central cooling structure 13, and multiple bottom mold inlet cooling points 14 and bottom mold rounded corner cooling points 15, and the side mold 3 is provided with a side mold inlet cooling point 34.

[0051] Specifically, the double locking ring is also provided with a positioning hole 150 for the diversion cone 11 and a cutting table 140.

[0052] By setting multiple cooling holes on the mold, the temperature field of the mold can be easily adjusted.

[0053] Specifically, the bottom exhaust ports 21 are evenly distributed in a circumferential direction, and the bottom end of the bottom exhaust ports 21 is connected to honeycomb ventilation particles 211 by an interference fit.

[0054] Specifically, the diameter of the central exhaust port 23 is 10-45 mm.

[0055] Specifically, it also includes an inlet section 323 that is funnel-shaped and connected to the filter channel 322. The upper end of the inlet section 323 protrudes from the upper end face of the side mold 3. The filter channel 322 is cylindrical and a cylindrical filter screen 324 is provided inside the filter channel 322.

[0056] Specifically, the filter screen 324 is a 16-20 mesh fiber screen that has been heated and degummed, and the overall diameter of the filter screen 324 is 30-50mm.

[0057] Specifically, the molding cavity 4 includes a cap-shaped shrinkage channel 41 located between the top mold 2 and the side mold 3 and above the top of the double locking ring, wherein the width of the cross-section of the cap-shaped shrinkage channel 41 is ( Figure 2 a1) is greater than the width of the lock ring section ( Figure 2 The height of the cross-section of the cap opening compensation channel 41 is 1.7-2.5 times larger than that of a2). Figure 2 (b1) is higher than the height of the lock ring section ( Figure 2 (b2) 3-5 times larger.

[0058] Example 2

[0059] A method for casting a lock ring, utilizing the lock ring casting mold described in Example 1, the method comprising:

[0060] S1. After melting the aluminum alloy at 680-720℃, molten aluminum is obtained. Argon gas is introduced into the molten aluminum to remove gas, so that the density of the molten aluminum is not less than 2.58 g / cm3.

[0061] S2. Use a robotic arm to control the ladle to take soup. First, detect the height of the aluminum liquid level at the bottom of the ladle. Then, push the oxide scale on the surface of the aluminum liquid to the far end of the soup taking operation by the robotic arm.

[0062] S3. Using a robotic arm, pour the molten aluminum in the pouring ladle into the inlet section 323 according to the prefabricated path. After pouring, rotate the pouring ladle 180 degrees using the robotic arm, and then use the robotic arm to pour out the aluminum sheet remaining on the outer wall of the pouring ladle.

[0063] The robotic arm sets up a linkage ladle at the front end to detect the liquid level of the soup according to a preset path, pushes away the oxidized scum, takes the soup, pours it, returns and pours it out, and keeps the water outlet warm while waiting.

[0064] S4. The molten aluminum enters the forming cavity 4 after passing through the filter screen 324 and the dark cap in sequence, where it solidifies. It is then cooled by water mist through the central cooling structure 13, the small ring cooling structure 12, the bottom mold inlet cooling point 14, the upper mold inlet cooling point, the side mold inlet cooling point 34, the top mold riser cooling point 24, the top mold inlet cooling point 25, and the bottom mold rounded corner cooling point 15. The entire cooling cycle is 200-300 seconds.

[0065] S5. After cooling, a double locking ring is obtained in the forming cavity 4. The double locking ring is cut to obtain locking ring A100 and locking ring B110. The intermediate connecting spokes 130 of each locking ring A100 and locking ring B110 are evenly distributed with 4-8 sets, and the thickness of each set of intermediate connecting spokes 130 is 6-12mm. Figure 2 (c) with a width of 15-50mm.

[0066] The double locking ring comprises upper and lower layers. The front of the upper and lower locking rings is cooled by water mist through the central cooling structure 13, the small ring cooling structure 12, the bottom mold inlet cooling point 14, the upper mold inlet cooling point, the side mold inlet cooling point 34, the top mold riser cooling point 24, the top mold inlet cooling point 25, and the bottom mold rounded corner cooling point 15. Cooling is achieved by setting cooling pipes and water mist nozzles on each cooling point or cooling structure.

[0067] The argon gas has a purity of ≥99.99%, and the ceramic rotor of the degassing device is continuously operated with a rotation speed setting range of 520±25 rpm / min, a pressure setting of 0.25-0.45MPa, and a flow rate of 2.5±0.5cm3 / h.

[0068] The aluminum alloy used is AlSi7Mg aluminum alloy, and the key metal chemical composition elements by weight percentage are: Al≥92; Si: 6.8~7.1; Mg: 0.28~0.31; Sr: 0.012~0.018; Fe≤0.12; Ca<0.003.

[0069] This invention improves the quality of the locking ring by setting a double-layered locking ring cavity inside the mold and setting multiple cooling holes on the mold, which facilitates the adjustment of the mold temperature field. By using a single-sided double-cavity water mist cooling casting method to cast the locking ring, the invention also has high process stability, high production efficiency, and reduced manufacturing costs.

[0070] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A mold for casting a lock ring, characterized in that, include: Bottom mold (1); Top mold (2), the top mold (2) is located on the upper side of the bottom mold (1); as well as Side mold (3), the side mold (3) is located on the periphery of the bottom mold (1) and the top mold (2), and forms a double-locking ring forming cavity (4) between the bottom mold (1) and the top mold (2). The double-locking ring includes two integrally formed upper and lower locking rings, including locking ring A (100) and locking ring B (110). Both locking ring A (100) and locking ring B (110) include locking plate steps and locking holes. Locking ring B (110) also includes a positioning wheel lip (120). The bottom mold (1) has a flow divider cone (11) at the center of its upper end and located in the forming cavity (4). The top mold (2) is provided with a central riser (22) that is positioned and cooperates with the flow divider cone (11) and a central vent (23) that communicates with the central riser (22). The bottom end of the top mold (2) is also provided with a bottom vent (21). The side mold (3) is provided with a hidden cap (31) located at the side end of the molding cavity (4), a filter channel (322) communicating with the hidden cap (31), and an upper exhaust port (33) communicating with the hidden cap (31).

2. The mold for casting a lock ring according to claim 1, characterized in that, The top mold (2) is provided with multiple top mold riser cooling points (24) and top mold inlet cooling points (25). The bottom mold (1) is provided with a small ring cooling structure (12), a central cooling structure (13), multiple bottom mold inlet cooling points (14) and bottom mold rounded corner cooling points (15). The side mold (3) is provided with a side mold inlet cooling point (34).

3. The mold for casting a lock ring according to claim 1, characterized in that, The bottom exhaust ports (21) are evenly distributed in the circumferential direction, and the bottom end of the bottom exhaust ports (21) is connected to honeycomb ventilation particles (211) by interference fit.

4. The mold for casting a lock ring according to claim 1, characterized in that, The diameter of the central exhaust port (23) is 10-45 mm.

5. A mold for casting a lock ring according to claim 1, characterized in that, It also includes an inlet section (323) that is funnel-shaped and connected to the filter channel (322). The upper end of the inlet section (323) protrudes from the upper end face of the side mold (3). The filter channel (322) is cylindrical and a cylindrical filter screen (324) is provided inside the filter channel (322).

6. A mold for casting a lock ring according to claim 5, characterized in that, The filter screen (324) is a 16-20 mesh fiber screen that has been heated and degummed, and the overall diameter of the filter screen (324) is 30-50 mm.

7. A mold for casting a lock ring according to claim 1, characterized in that, The forming cavity (4) includes a cap-shaped shrinkage channel (41) located between the top mold (2) and the side mold (3) and above the top of the double locking ring. The width of the cap-shaped shrinkage channel (41) is 1.7-2.5 times larger than the width of the locking ring, and the height of the cap-shaped shrinkage channel (41) is 3-5 times larger than the height of the locking ring.

8. A method for casting a lock ring, characterized in that, The method, using the mold for casting a lock ring according to any one of claims 1-7, comprises: S1. After melting the aluminum alloy at 680-720℃ to obtain molten aluminum, argon gas is introduced into the molten aluminum to remove gas, so that the density of the molten aluminum is not less than 2.58 g / cm³. 3 ; S2. Use a robotic arm to control the ladle to take soup. First, detect the height of the aluminum liquid level at the bottom of the ladle. Then, push the oxide scale on the surface of the aluminum liquid to the far end of the soup taking operation by the robotic arm. S3. Using a robotic arm, pour the molten aluminum in the pouring ladle into the inlet section (323) according to the prefabricated path. After pouring, rotate the pouring ladle 180 degrees using the robotic arm, and then use the robotic arm to pour out the aluminum sheet remaining on the outer wall of the pouring ladle. S4. After passing through the filter screen (324) and the dark cap, the aluminum liquid enters the forming cavity (4) for solidification. It is then cooled by water mist through the central cooling structure (13), the small ring cooling structure (12), the bottom mold inlet cooling point (14), the upper mold inlet cooling point, the side mold inlet cooling point (34), the top mold riser cooling point (24), the top mold inlet cooling point (25), and the bottom mold rounded corner cooling point (15). The entire cooling cycle is 200-300s. S5. After cooling, a double locking ring is obtained in the forming cavity (4). The double locking ring is cut to obtain locking ring A (100) and locking ring B (110). The middle connecting spokes (130) of each locking ring A (100) and locking ring B (110) are evenly distributed in 4-8 groups. The thickness of each group of middle connecting spokes (130) is 6-12mm and the width is 15-50mm.

9. The locking ring casting method as described in claim 8, characterized in that, The argon gas has a purity of ≥99.99%. The ceramic rotor of the degassing device is continuously operated, with a rotation speed setting range of 520±25 rpm / min, a pressure setting of 0.25-0.45MPa, and a flow rate of 2.5±0.5cm³. 3 / h.

10. The locking ring casting method as described in claim 8, characterized in that, The double locking ring comprises upper and lower layers. The front of the upper and lower locking rings is cooled by water mist through a central cooling structure (13), a small ring cooling structure (12), a bottom mold inlet cooling point (14), an upper mold inlet cooling point, a side mold inlet cooling point (34), a top mold riser cooling point (24), a top mold inlet cooling point (25), and a bottom mold rounded corner cooling point (15).

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