Line control brake valve body support die casting device

Abstract

The application discloses a line control brake valve body support die-casting device and belongs to the technical field of die-casting. The device comprises a base, a mounting frame and a water tank with an open top are fixedly installed on the base, a water inlet and a drain are arranged on the side walls of opposite sides of the water tank, a hydraulic cylinder applies downward pressure on a female die and a male die, and the pressure is greater than the elasticity of a first spring. Therefore, a top rod gradually retracts into a sleeve. In this process, the female die and the male die in a closed die state move downward together and gradually immerse below the liquid level in the water tank. When the female die and the male die in the closed die state are completely immersed below the liquid level, uniform cooling of the metal liquid can be realized. In this process, the metal liquid in the mold cavity is gradually cooled and solidified. The immersion cooling method can reduce the temperature difference of each part of the surface of the female die and the male die, effectively reduce the generation of thermal stress, thereby reducing the defects of the die-castings caused by thermal stress, and improving the forming quality of the workpiece.

Description

Technical Field

[0001] This invention relates to the field of die casting technology, and more specifically, to a die casting device for a line-controlled brake valve body support. Background Technology

[0002] With the development of the new energy vehicle industry, lightweight design has become a key element in improving vehicle performance and energy efficiency. In online braking systems, the valve body bracket, as a core component, not only needs to meet high strength requirements to withstand complex mechanical stresses, but also needs to be lightweight to reduce the overall vehicle weight, while achieving high precision to ensure the reliability and response speed of the braking system. Therefore, in existing technologies, aluminum alloys with characteristics such as lightweight, high strength, and good corrosion resistance are usually used to manufacture valve body brackets.

[0003] Because valve body support molds have complex structures and require high dimensional accuracy, even minor defects can affect the quality of die-cast parts. Therefore, precise injection of a fixed amount of molten metal is necessary during the die-casting process. However, current technology typically involves creating a flow channel in the mold to cool the molten metal within the cavity. This method, however, leads to a gradual increase in the coolant temperature, resulting in inconsistent solidification rates across different parts of the cavity. When the solidification rates are uneven, the parts that solidify first shrink, while the later-solidified parts continue to cool and shrink. This asynchronous shrinkage causes the accumulation of internal stress, which can deform the die-cast part, potentially leading to cracks or other defects, ultimately resulting in decreased product quality or product deformation.

[0004] To address this, a die-casting device for the support bracket of a line-controlled brake valve is proposed. Summary of the Invention

[0005] In view of the problems existing in the prior art, the purpose of this invention is to provide a die-casting device for a brake-by-wire valve body support, which can improve the cooling effect and reduce the probability of generating thermal stress.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A die-casting device for a brake-by-wire valve body support, including a base;

[0008] A mounting bracket and a water tank with an open top are fixedly installed on the base. Inlet and outlet are respectively provided on the side walls of the water tank on opposite sides.

[0009] A hydraulic cylinder is fixedly installed on the bottom wall of the mounting frame. A die is fixedly installed on the output end of the hydraulic cylinder. A mold cavity is opened on the die. A feed pipe communicating with the outside is inserted into the top wall of the mold cavity.

[0010] A spring telescopic rod is vertically fixed on the inner bottom wall of the water tank, and a punch is provided on the output end of the spring telescopic rod;

[0011] The inner wall of the water tank is horizontally fixed with guide pipes, and two adjacent guide pipes are connected to each other. The side wall of the guide pipes is evenly provided with through holes that communicate with the water tank, and the water tank is provided with a water supply mechanism to supply water to the guide pipes.

[0012] The spring telescopic rod includes a sleeve, a push rod, and a first spring. The sleeve is vertically fixed on the bottom wall of the water tank and has an opening at the top. The push rod is vertically slidably inserted into the sleeve. The two ends of the first spring are in contact with the bottom end face of the push rod and the bottom wall of the sleeve, respectively.

[0013] Furthermore, the water supply mechanism includes a water pump fixedly installed on a water tank, with the input end of the water pump extending into the water tank and the output end of the water pump extending into a guide pipe.

[0014] Furthermore, a groove is provided on the inner wall of the water tank, and a switch is fixedly installed in the groove. The switch is used to control the operation of the water pump.

[0015] A baffle is horizontally hinged to the side wall of the groove, and an elastic element is installed between the top wall of the baffle and the top wall of the groove.

[0016] Furthermore, a conduit is fixedly inserted into the side wall of the sleeve, extending into the water inlet, so that both ends of the conduit are connected to the sleeve and the water inlet respectively; a cavity communicating with the sleeve is opened on the push rod, and pressure relief ports are evenly opened on the side wall of the cavity.

[0017] Furthermore, the bottom wall of the punch is provided with an insertion hole, the ejector pin is rotatably inserted into the insertion hole, and the side wall of the insertion hole is uniformly embedded with balls.

[0018] A rotating rod is vertically fixed on the top wall of the cavity. The bottom end of the rotating rod extends into the sleeve, and a propeller is fixedly installed at the bottom end of the rotating rod. The first spring is slidably engaged with the push rod.

[0019] Furthermore, an elastic rope is fixedly installed on the side wall of the guide tube, and a turbulence block that mates with the through hole is fixedly installed on the elastic rope.

[0020] Furthermore, stirring rods are evenly and circumferentially installed on the side wall of the top rod.

[0021] Furthermore, a frustum-shaped flow guide is fitted onto the outer wall of the die.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] (1) This solution utilizes the cooperation of a spring telescopic rod, a water tank, and a hydraulic cylinder. The hydraulic cylinder applies downward pressure to the die and punch, and the pressure is greater than the elastic force of the first spring. Therefore, the ejector rod gradually retracts into the sleeve. During this process, the die and punch, which are in the closed state, move down together and gradually sink below the liquid surface in the water tank. When the die and punch, which are in the closed state, are completely immersed below the liquid surface, uniform cooling of the molten metal can be achieved. During this process, the molten metal in the mold cavity gradually cools and solidifies. This immersion cooling method can reduce the temperature difference between various parts of the die and punch surfaces, effectively reducing the generation of thermal stress, thereby reducing defects in the die casting caused by thermal stress and improving the forming quality of the workpiece.

[0024] (2) In this scheme, the water pump and the guide pipe work together. The energized water pump supplies water to the guide pipe, and the guide pipe discharges coolant outward through the through hole. When the bottom wall of the punch contacts the liquid surface in the water tank and the die is not yet fully immersed in the coolant, the coolant discharged from the through hole will flow to the surface of the die. Therefore, as the die and punch are gradually immersed in the coolant, the temperature difference between them is effectively reduced, thereby promoting uniform heat dissipation of the molten metal in the mold cavity and reducing the probability of generating thermal stress.

[0025] (3) This solution uses the cooperation of through holes, elastic ropes and turbulence blocks. When both the die and the punch move below the liquid surface, the liquid level will rise. At this time, the liquid level will submerge the turbulence blocks, so that the low-temperature coolant above the die and the high-temperature coolant that has absorbed heat can be stirred during the shaking of the turbulence blocks. This can reduce the temperature difference between the coolant in contact with various parts of the die surface and reduce the probability of thermal stress.

[0026] (4) This scheme uses the cooperation of the conduit, cavity and pressure relief port to allow part of the coolant in the inlet to flow along the conduit into the sleeve and cavity, and then discharge it evenly into the water tank through the pressure relief port. This allows the low temperature coolant to come into contact with the coolant in the water tank that has already absorbed heat, thereby cooling the coolant in the water tank and reducing the overall temperature of the coolant in the water tank, thus improving the cooling and solidification effect on the molten metal in the mold cavity. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a bottom-view structural diagram of the present invention;

[0029] Figure 3 This is a top view of the structure of the present invention;

[0030] Figure 4 This is a front cross-sectional view of the present invention;

[0031] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A;

[0032] Figure 6 For the present invention Figure 4 Enlarged structural diagram at point B;

[0033] Figure 7 For the present invention Figure 4 A magnified structural diagram at point C.

[0034] Explanation of the labels in the diagram:

[0035] 1. Base; 2. Mounting bracket; 3. Water tank; 4. Hydraulic cylinder; 5. Die; 6. Mold cavity; 7. Feed pipe; 8. Spring telescopic rod; 801. Sleeve; 802. Push rod; 803. First spring; 9. Punch; 10. Guide pipe; 11. Through hole; 12. Water pump; 13. Flow guide cover; 14. Switch; 15. Baffle; 16. Elastic element; 17. Conduit; 18. Cavity; 19. Pressure relief port; 20. Ball bearing; 21. Rotating rod; 22. Propeller; 23. Stirring rod; 24. Elastic rope; 25. Turbulence block. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] Example 1:

[0038] Please see Figures 1 to 7 A die-casting device for a line-controlled brake valve body support, including a base 1;

[0039] A mounting bracket 2 and a water tank 3 with an open top are fixedly installed on the base 1. Water tank 3 has an inlet and a drain on opposite side walls, with the drain located above the inlet. During operation, coolant is continuously supplied to the inlet via an external water source, ensuring that the water tank 3 always contains coolant.

[0040] A hydraulic cylinder 4 is fixedly installed on the bottom wall of the mounting frame 2. A die 5 is fixedly installed on the output end of the hydraulic cylinder 4. A mold cavity 6 is opened on the die 5. A feed pipe 7 communicating with the outside is inserted into the top wall of the mold cavity 6. The feed pipe 7 is used to inject molten metal into the mold cavity 6. The distance between the top of the feed pipe 7 and the top wall of the die 5 is 15-20 cm. Therefore, when the die 5 is submerged below the liquid surface in the water tank 3, the top of the feed pipe 7 can be positioned above the liquid surface to prevent water from entering the mold cavity 6.

[0041] A spring telescopic rod 8 is vertically fixed on the inner bottom wall of the water tank 3, and a punch 9 is provided on the output end of the spring telescopic rod 8;

[0042] A guide pipe 10 is horizontally fixedly installed on the four inner side walls of the front, back, left and right of the water tank 3. Two adjacent guide pipes 10 are connected to each other. Through holes 11 that communicate with the water tank 3 are evenly opened on the side wall of the guide pipe 10. The water tank 3 is provided with a water supply mechanism for supplying water to the guide pipe 10.

[0043] The spring telescopic rod 8 includes a sleeve 801, a push rod 802 and a first spring 803. The sleeve 801 is vertically fixed on the bottom wall of the water tank 3 and the top of the sleeve 801 is open. The push rod 802 is vertically slidably inserted into the sleeve 801. The two ends of the first spring 803 are in contact with the bottom end face of the push rod 802 and the inner bottom wall of the sleeve 801, respectively.

[0044] The coolant can be either water-based or oil-based, both of which are existing technologies and will not be described in detail here.

[0045] Hydraulic cylinder 4 is existing technology and will not be described in detail.

[0046] The water supply mechanism includes a water pump 12 fixedly installed on the water tank 3, with the input end of the water pump 12 extending into the water tank 3 and the output end of the water pump 12 extending into the guide pipe 10.

[0047] A groove is provided on the inner wall of the water tank 3, and a switch 14 is fixedly installed in the groove. The switch 14 is electrically connected to the water pump 12 and is used to control the operation of the water pump 12.

[0048] A baffle 15 is horizontally hinged to the side wall of the groove, and an elastic element 16 is installed between the top wall of the baffle 15 and the top wall of the groove.

[0049] When the punch 9 is not subjected to vertical downward pressure, the spring telescopic rod 8 is in a naturally extended state, and the bottom wall of the punch 9 is above the liquid surface in the water tank 3.

[0050] During the operation, hydraulic cylinder 4 is started first. The output end of hydraulic cylinder 4 drives the die 5 to move down until the die 5 and the punch 9 are closed. At this time, the operator manually controls hydraulic cylinder 4 to stop extending.

[0051] Then inject molten metal into the feed pipe 7 until the molten metal fills the mold cavity 6.

[0052] Then, the hydraulic cylinder 4 is manually controlled to continue extending. At this time, the hydraulic cylinder 4 applies downward pressure to the die 5 and the punch 9, and the pressure is greater than the elastic force of the first spring 803. Therefore, the ejector rod 802 gradually retracts into the sleeve 801. During this process, the die 5 and the punch 9, which are in the mold closing state, move down together and gradually sink below the liquid surface in the water tank 3.

[0053] When the concave mold 5 and the convex mold 9 are fully immersed below the liquid surface in the closed state, uniform cooling of the molten metal can be achieved. During this process, the molten metal in the mold cavity 6 gradually cools and solidifies. This immersion cooling method can reduce the temperature difference between various parts of the surface of the concave mold 5 and the convex mold 9, effectively reducing the generation of thermal stress, thereby reducing defects in the die casting caused by thermal stress and improving the forming quality of the workpiece.

[0054] When the baffle 15 is not under force, it is in a horizontal state under the action of the elastic element 16. As the punch 9 moves down, the punch 9 gradually contacts the baffle 15 and applies pressure to the baffle 15, thereby causing the baffle 15 to rotate around the hinge point. The rotating baffle 15 squeezes the switch 14, thereby causing the water pump 12 to work. At the moment the water pump 12 works, the bottom wall of the punch 9 contacts the liquid surface in the water tank 3.

[0055] The energized water pump 12 supplies water to the guide pipe 10, which discharges coolant through the through hole 11. When the bottom wall of the punch 9 contacts the liquid surface in the water tank 3 and the die 5 is not yet fully immersed in the coolant, the coolant discharged from the through hole 11 flows to the surface of the die 5. Therefore, as the die 5 and the punch 9 are gradually immersed in the coolant, the temperature difference between them is effectively reduced, thereby promoting uniform heat dissipation of the molten metal in the mold cavity 6 and reducing the probability of thermal stress.

[0056] After the molten metal in the mold cavity 6 cools and solidifies, the hydraulic cylinder 4 is manually controlled to retract. At this time, the hydraulic cylinder 4 no longer applies pressure to the die 5. Therefore, the compressed first spring 803 pushes the punch 9 and the die 5 out of the water tank 3 through the ejector rod 802. When the ejector rod 802 extends to the maximum extent from the sleeve 801, the hydraulic cylinder 4 continues to retract. At this time, the die 5 and the punch 9 gradually separate, so that the formed workpiece can be taken out, thus completing the die casting.

[0057] like Figure 4 , Figure 6 As shown, a conduit 17 is fixedly inserted into the side wall of the sleeve 801. The conduit 17 extends into the water inlet, so the two ends of the conduit 17 are connected to the sleeve 801 and the water inlet, respectively. A cavity 18 communicating with the sleeve 801 is opened on the push rod 802, and pressure relief ports 19 are evenly opened on the side wall of the cavity 18.

[0058] When an external water source provides coolant to the inlet, part of the coolant in the inlet flows along the conduit 17 into the sleeve 801 and the cavity 18, and then is evenly discharged into the water tank 3 through the pressure relief port 19. This allows the low-temperature coolant to come into uniform contact with the coolant in the water tank 3 that has already absorbed heat, thereby cooling the coolant in the water tank 3 and lowering the overall temperature of the coolant in the water tank 3, thus improving the cooling and solidification effect on the molten metal in the mold cavity 6.

[0059] Furthermore, with the cooperation of the water pump 12, the low-temperature coolant located at the bottom of the water tank 3 can be transferred to the top of the die 5, so that the temperature of the coolant that has absorbed heat above the die 5 can be reduced in time, reducing the temperature difference between the surface of the die 5 and the surface of the punch 9, further reducing the probability of generating thermal stress, and improving the cooling rate, thus improving work efficiency.

[0060] like Figure 6 As shown, a socket is provided on the bottom wall of the punch 9, and the ejector rod 802 is rotatably inserted into the socket. Therefore, the ejector rod 802 can rotate in the socket on the punch 9, and ball bearings 20 are evenly embedded on the side wall of the socket. By setting the ball bearings 20, the friction force on the ejector rod 802 during rotation can be reduced. Furthermore, under the action of the ball bearings 20, the gap between the ejector rod 802 and the side wall of the socket is increased, which facilitates the flow of coolant into the socket and improves the heat dissipation effect on the punch 9. Moreover, when using cooling oil as the coolant, the cooling oil entering the socket can reduce the friction force on the ejector rod 802 during rotation, ensuring that the ejector rod 802 can rotate normally.

[0061] A rotating rod 21 is vertically fixed on the top wall of the cavity 18. The bottom end of the rotating rod 21 extends into the sleeve 801, and a propeller 22 is fixedly installed at the bottom end of the rotating rod 21. The first spring 803 is slidably engaged with the push rod 802.

[0062] The coolant flowing along the sleeve 801 impacts the propeller 22. The propeller 22, subjected to the impact force, drives the rotating rod 21 to rotate, which in turn drives the ejector rod 802 to rotate as well. During the rotation of the ejector rod 802, the position of the pressure relief port 19 can be changed, thereby increasing the contact area between the low-temperature coolant discharged from the pressure relief port 19 and the punch 9. This further improves the mixing effect between the low-temperature coolant and the high-temperature coolant that has absorbed heat, thereby reducing the temperature difference of the coolant in contact with various parts of the surface of the punch 9 and the die 5.

[0063] like Figure 5 As shown, an elastic rope 24 is fixedly installed on the side wall of the guide pipe 10, wherein the two ends of the elastic rope 24 are fixedly connected to the side wall of the guide pipe 10, and a turbulence block 25 that cooperates with the through hole 11 is fixedly installed on the elastic rope 24.

[0064] During the discharge of coolant from through-hole 11, the coolant impacts the baffle block 25, causing the baffle block 25 to detach from the sidewall of the guide pipe 10 and sway. At the same time, the coolant slides along the surface of the baffle block 25, thereby changing the diffusion range of the coolant discharged from through-hole 11.

[0065] During the downward movement of the die 5, the contact area between the low-temperature coolant discharged by the water pump 12 and the die 5 is increased, which can reduce the temperature difference between the surfaces of the die 5 and the punch 9.

[0066] When the concave mold 5 is submerged below the liquid surface, the contact area between the low-temperature coolant discharged by the water pump 12 and the liquid surface in the water tank 3 is increased, which can reduce the temperature difference between the surface coolant of the concave mold 5 and the convex mold 9.

[0067] In summary, with the cooperation of the turbulence block 25 and the elastic rope 24, the temperature difference between the surfaces of the die 5 and the punch 9 can be reduced, which further reduces the probability of thermal stress generation during the cooling process of the molten metal.

[0068] Furthermore, when both the concave mold 5 and the convex mold 9 move below the liquid surface, the liquid level will rise. At this time, the liquid level will submerge the turbulence block 25, thereby stirring the low-temperature coolant above the concave mold 5 and the high-temperature coolant that has absorbed heat during the shaking of the turbulence block 25. This can reduce the temperature difference between the coolant in contact with various parts of the surface of the concave mold 5, and reduce the probability of thermal stress.

[0069] like Figure 6 As shown, stirring rods 23 are evenly and circumferentially installed on the side wall of the top rod 802.

[0070] During the rotation of the push rod 802, the mixing efficiency of the low-temperature coolant and the high-temperature coolant is improved under the action of the stirring rod 23, which further reduces the temperature difference between the coolants in different parts of the water tank 3.

[0071] like Figure 4 As shown, a frustum-shaped flow guide shroud 13 is fitted on the outer side wall of the die 5. The side wall of the flow guide shroud 13 is inclined, and the cross-sectional area of ​​the flow guide shroud 13 gradually increases from top to bottom.

[0072] As the molten metal cools and the die 5 detaches from the liquid surface, the coolant remaining on the top wall of the die 5 gradually flows to the outer wall of the guide shield 13 and downwards along the inclined sidewall of the guide shield 13 until the coolant completely detaches from the guide shield 13. At this point, the coolant detached from the guide shield 13 falls directly into the water tank 3 without dripping onto the surface of the punch 9. This effectively avoids interference from the coolant on the surface of the punch 9, ensuring that the surface of the punch 9 remains clean and facilitating subsequent processing.

[0073] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A die-casting device for a brake-by-wire valve body support, including a base (1); Its features are: The base (1) is fixedly installed with a mounting bracket (2) and a water tank (3) with an open top. The water tank (3) has an inlet and an outlet on the opposite side walls. A hydraulic cylinder (4) is fixedly installed on the bottom wall of the mounting frame (2). A die (5) is fixedly installed on the output end of the hydraulic cylinder (4). A mold cavity (6) is opened on the die (5). A feed pipe (7) communicating with the outside is inserted into the top wall of the mold cavity (6). A spring telescopic rod (8) is vertically fixed on the inner bottom wall of the water tank (3), and a punch (9) is provided on the output end of the spring telescopic rod (8). Each of the inner walls of the water tank (3) is horizontally fixed with a guide pipe (10), and two adjacent guide pipes (10) are connected to each other. The side walls of the guide pipes (10) are evenly provided with through holes (11) that communicate with the water tank (3), and the water tank (3) is provided with a water supply mechanism for supplying water to the guide pipes (10). The spring telescopic rod (8) includes a sleeve (801), a top rod (802) and a first spring (803). The sleeve (801) is vertically fixed on the bottom wall of the water tank (3) and the top of the sleeve (801) is open. The top rod (802) is vertically slidably inserted into the sleeve (801). The two ends of the first spring (803) are in contact with the bottom end face of the top rod (802) and the bottom wall of the sleeve (801) respectively. A conduit (17) is fixedly inserted into the side wall of the sleeve (801). The conduit (17) extends into the water inlet, so the two ends of the conduit (17) are connected to the sleeve (801) and the water inlet, respectively. A cavity (18) communicating with the sleeve (801) is opened on the top rod (802), and pressure relief ports (19) are evenly opened on the side wall of the cavity (18). The bottom wall of the punch (9) is provided with an insertion hole, the push rod (802) is rotatably inserted into the insertion hole, and the side wall of the insertion hole is uniformly and movablely embedded with balls (20). A rotating rod (21) is vertically fixed on the top wall of the cavity (18). The bottom end of the rotating rod (21) extends into the sleeve (801), and a propeller (22) is fixedly installed at the bottom end of the rotating rod (21). The first spring (803) and the top rod (802) are in sliding cooperation. A stirring rod (23) is uniformly circumferentially installed on the side wall of the top rod (802).

2. The die-casting device for the line-controlled brake valve body support according to claim 1, characterized in that: The water supply mechanism includes a water pump (12) fixedly installed on a water tank (3), the input end of the water pump (12) extending into the water tank (3), and the output end of the water pump (12) extending into a guide pipe (10).

3. The die-casting device for the line-controlled brake valve body support according to claim 2, characterized in that: The inner wall of the water tank (3) is provided with a groove, and a switch (14) is fixedly installed in the groove. The switch (14) is used to control the operation of the water pump (12). A baffle (15) is horizontally hinged to the side wall of the groove, and an elastic element (16) is installed between the top wall of the baffle (15) and the top wall of the groove.

4. The die-casting device for the line-controlled brake valve body support according to claim 1, characterized in that: An elastic rope (24) is fixedly installed on the side wall of the guide pipe (10), and a turbulence block (25) that cooperates with the through hole (11) is fixedly installed on the elastic rope (24).

5. The die-casting device for the line-controlled brake valve body support according to claim 1, characterized in that: The outer wall of the die (5) is fitted with a frustum-shaped flow guide (13).

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