Vehicle beam pipe casting mold
By setting cooling components on the inside of the casting sand core of the automobile pipe beam casting mold, the problem of strength reduction caused by the V-pushing boss root shrinkage during the pipe beam casting process is solved, and a more uniform wall thickness and higher strength are achieved.
Patent Information
- Application Number
- CN202510057196.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2025-04-18
AI Technical Summary
During the casting process, the cross-sectional area of the parts is reduced and the strength is reduced due to the shrinkage of the V-push boss base, and the prior art is difficult to effectively solve this problem.
A vehicle-based beam and pipe casting mold is designed. By providing cooling components, including V-shaped cooling capsules and push components, the key parts of the beam and pipe body are assisted to avoid shrinkage.
Through auxiliary cooling, the strength reduction problem caused by the shrinkage holes at the root of the V-push boss is avoided, so that the wall thickness of the casting parts is basically consistent, the strength of the beam and pipe is increased, the structure is simplified, and the cost is reduced.
Smart Images
Figure CN119839248A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of automobile parts manufacturing, and in particular relates to a beam tube casting mold for an automobile. Background Art
[0002] The automobile tube beam is a very important supporting part in the automobile instrument panel system. The tube beam is prone to failure during use. The main failure form is that the shrinkage hole (shrinkage) at the root of the V-push boss during the casting process of the tube beam causes the cross-sectional area of the part to decrease, resulting in reduced strength, which causes stress concentration caused by the large thickness difference of the tube beam and local tearing during use. In order to eliminate the shrinkage of the V-push threaded hole, the general idea is to increase the riser, but due to the special structure of the tube beam, these measures cannot achieve the shrinkage compensation of the shrinkage part. Summary of the invention
[0003] In view of this, the object of the present invention is to provide a vehicle beam tube casting mold, in which a cooling device can be arranged inside the casting sand core to solve the above-mentioned technical problems.
[0004] In order to achieve the above object, the present invention provides the following technical solutions: The present invention provides a beam tube casting mold for a vehicle, comprising a beam tube body, wherein an outer cover is provided on the outer side of the beam tube body, a casting sand core is provided on the inner side of the beam tube body, a cavity is formed on the inner side of the casting sand core, a cooling component is provided on the inner side of the casting sand core, and the cooling component is adjacent to the position of the V-push boss of the beam tube body; the cooling component comprises a V-shaped cooling bladder, and the cooling bladder is supported on the inner side of the casting sand core by a support platform, and the support platform is fixed on the inner side of the casting sand core, and a first pressure plate and a second pressure plate are respectively fixed at both ends of the cooling bladder, an angle is formed between the first pressure plate and the second pressure plate, and the second pressure plate is connected to a pushing component, and the cooling bladder can be compressed by the action of the pushing component; the cooling bladder is connected to a liquid exchange tank on the outer side of the casting sand core through a liquid exchange pipeline.
[0005] Furthermore, the pushing assembly includes a push rod, a push plate, a bracket, a roller, a cam and a rotation control mechanism, the bracket is fixed on the inner side of the casting sand core, the cam and the roller are rotatably connected to the bracket at the same time, one end of the push rod is hinged to the roller, and the other end is slidably connected to the bracket, and the push plate is fixed to the tail of the push rod; the rotation control mechanism controls the rotation of the cam, the surface of the cam abuts against the roller, the rolling drives the push rod to move, and the push rod drives the second pressure plate to rotate through the push plate to compress the cooling bag.
[0006] Furthermore, the rotation control mechanism includes a rotating shaft, a gear, a rack, a sliding rod and a pressure rod. The cam is rotatably connected to the bracket through the rotating shaft. The rotating shaft is coaxially connected with a gear. The gear is meshed with a vertically arranged rack. The sliding rod is fixed to the upper end of the rack. The lower end of the pressure rod forms a slot that cooperates with the sliding rod.
[0007] Furthermore, an exhaust hole is provided on the casting sand core, and the pressure rod is inserted into the exhaust hole.
[0008] Furthermore, an elastic restoring device is provided between the first pressing plate and the second pressing plate, and the elastic restoring device comprises a spring, and two ends of the spring are fixedly connected to the first pressing plate and the second pressing plate respectively.
[0009] Furthermore, the second pressing plate includes an inclined plate and a straight plate fixedly connected to the inclined plate, the push rod is perpendicular to the surface of the straight plate, and an open groove for the push rod to pass through is formed on the straight plate.
[0010] Furthermore, a support cavity with an upper end opening is formed on the upper side of the support platform, the cooling bag is installed in the support cavity, and a sandblasting tube and a negative pressure sand suction tube are installed on the side of the support cavity.
[0011] Furthermore, the beam tube body is made of ductile iron material, and double spiral reinforcement ribs are arranged on the inner side of the beam tube body.
[0012] Furthermore, two Φ30mm bosses are added on both sides and the upper part of the pipe beam body, and holes M10 are drilled on the bosses for installing pipe clamps.
[0013] The beneficial effects of the present invention are: The present invention discloses a beam tube casting mold for a vehicle. By arranging a cooling assembly on the inner side of a casting sand core, the key parts of the beam tube body during casting can be auxiliary cooled, thereby avoiding the problem of strength reduction caused by the reduction of the cross-sectional area of the part due to the shrinkage hole at the root of the V-thrust boss, so that the wall thickness of the part after casting is basically consistent, thereby improving the strength of the beam tube.
[0014] In the device of the present invention, since the surface of the cooling bag adopts a curved surface conforming method, and its outer arc surface faces the side where the beam tube body is located, it is convenient to form a temperature gradient for uniform sequential cooling. The cooling bag can be compressed by pushing the component to change the cooling angle range. The position of the cooling bag can also be adjusted by connecting the liquid exchange tube to adapt to different installation positions, so as to facilitate the alignment of the zero-point installation position and make the casting consistency of each beam tube better.
[0015] In the device of the present invention, a cooling bag is provided to connect with the fluid exchange tube. When the cooling bag is compressed, the fluid exchange tube can be compressed. The coolant can also flow back into the cooling bag through the retraction effect of the cooling bag. The present invention provides power for fluid exchange by pushing the device, and no additional power drive mechanism is required. The structure can be simplified and economy can be ensured. Under the continuous pushing action, the cooling effect can also be guaranteed.
[0016] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration: Figure 1 It is a schematic structural diagram of the outer covering member of the present invention; Figure 2 It is a structural schematic diagram of the beam tube body; Figure 3 It is a structural schematic diagram of a casting sand core; Figure 4 It is a schematic diagram of the structure of the driving component; Figure 5 is a schematic diagram of the structure of the cooling component; Figure 6 It is a schematic diagram of the cooperation between the casting sand core and the pushing component; Figure 7 It is a structural schematic diagram of the rotation control mechanism.
[0018] The markings in the accompanying drawings are as follows: beam tube body 1, outer cover 2, casting sand core 3, cooling assembly 4, cooling bag 5, support platform 6, first pressure plate 7, second pressure plate 8, pushing assembly 9, liquid exchange pipeline 10, push rod 11, push plate 12, bracket 13, roller 14, cam 15, rotation control mechanism 16, rotating shaft 17, gear 18, rack 19, slide rod 20, pressure rod 21, exhaust hole 22, elastic recovery device 23, inclined plate 24, straight plate 25, open groove 26, support cavity 27, sandblasting tube 28, negative pressure sand suction tube 29, boss 30, V-push threaded hole 31, V-push boss 32. DETAILED DESCRIPTION
[0019] like Figures 1 to 7As shown, the present invention is a vehicle beam tube casting mold, comprising a beam tube body 1, an outer covering part 2 arranged on the outside of the beam tube body 1, and a casting sand core 3 arranged on the inside of the beam tube body 1. The outer covering part 2 and the casting sand core 3 are separated to form a cavity for casting the beam tube body 1. The beam tube body 1 is located in the cavity after molding, and a casting hole corresponding to the cavity is opened on the outer covering part 2. The shape of the casting sand core 3 is adapted to the shape of the beam tube body 1, and the overall tube wall thickness of the beam tube body 1 is about 7 mm.
[0020] In the present invention, a cavity is formed on the inner side of the casting sand core 3, and the shape of the cavity basically corresponds to the shape of the casting sand core 3. A cooling component 4 is arranged on the inner side of the casting sand core 3, and the cooling component 4 is adjacent to the position of the V-push boss 32 of the beam tube body 1. By setting the cooling component 4, the key parts of the beam tube body 1 during casting can be auxiliary cooled. Cooling from the inside can shorten the effective distance between the shrinkage part and the cooling component 4, eliminate the shrinkage hole (shrinkage) inside the V-push threaded hole 31, and avoid the problem of reduced strength caused by the reduction of the cross-sectional area of the part due to the shrinkage hole at the root of the V-push boss 32, so that the wall thickness of the part after casting is basically consistent, so as to improve the strength of the beam tube.
[0021] The cooling assembly 4 includes a V-shaped cooling capsule 5, which is made of a compressible material with high heat resistance. The cooling capsule 5 is supported on the inner side of the casting sand core 3 by a support platform 6, and the support platform 6 is fixed on the inner side of the casting sand core 3. The first pressing plate 7 and the second pressing plate 8 are fixed at both ends of the cooling capsule 5, respectively. There is an angle between the first pressing plate 7 and the second pressing plate 8. The second pressing plate 8 is connected to a pushing assembly 9. The cooling capsule 5 can be compressed by the pushing assembly 9 to adapt to the arc position of the V-pushing boss 32 of the beam tube body 1, so that the arc length is more fitted; the cooling capsule 5 is connected to the liquid exchange box outside the casting sand core 3 through the liquid exchange pipeline 10. When the cooling capsule 5 is compressed, the liquid exchange pipe can be compressed. Through the retraction of the cooling capsule 5, the coolant can also flow back into the cooling capsule 5. After the cooling capsule 5 is pushed, the pushing assembly 9 can be locked by a related locking device to prevent loosening.
[0022] The present invention provides a V-shaped cooling bag 5 and enlarges the V-push arc to R30 without interference of parts, which can greatly reduce casting stress and effectively prevent cracks. After 2,000 pieces of 50,000 kilometers of road testing, no fracture failure has occurred so far.
[0023] In this embodiment, the pushing assembly 9 includes a push rod 11, a push plate 12, a bracket 13, a roller 14, a cam 15 and a rotation control mechanism 16. The push rod 11 is arranged along the axial direction of the beam tube body 1, and is bent in the middle to avoid interference with the casting sand core 3. The bracket 13 is fixed on the inner side of the casting sand core 3, close to the middle position of the casting sand core 3. The cam 15 and the roller 14 are rotatably connected to the bracket 13 at the same time. One end of the push rod 11 is hinged to the roller 14, and the other end is slidably connected to the bracket 13. The push plate 12 is fixed to the tail of the push rod 11; when the rotation control mechanism 16 controls the cam 15 to rotate, the surface of the cam 15 abuts against the roller 14, and the rolling drives the push rod 11 to move. The push rod 11 drives the second pressure plate 8 to rotate through the push plate 12 to compress the cooling bag 5. The specific rotation control mechanism 16 includes a rotating shaft 17, a gear 18, a rack 19, a slide bar 20 and a pressure bar 21. The cam 15 is rotatably connected to the bracket 13 through the rotating shaft 17. The rotating shaft 17 is coaxially connected with the gear 18. The gear 18 is meshed with the vertically arranged rack 19. The slide bar 20 is fixed to the upper end of the rack 19. The lower end of the pressure bar 21 forms a slot that cooperates with the slide bar 20. By extending the upper end of the pressure bar 21 upward, the pressure bar 21 can be directly pushed up and down to drive the push rod 11 to move to compress the second pressure plate 8. It can not only bring about the problem of convenient control, but also avoid various edges and corners of the casting sand core 3. The overall structure is compact and easy to control. For example, after the pushing is completed, the locking device adopts a bolt, and the outer side of the pressure bar 21 is connected to the support plate. The bolt connects the support plate with the outer cover 2 to temporarily limit the position of the pressure bar 21.
[0024] In this embodiment, the casting sand core 3 is provided with an exhaust hole 22, and the pressure rod 21 is inserted into the exhaust hole 22. After the pressure rod 21 is removed, the exhaust hole 22 can be reserved on the casting sand core 3, and the exhaust is facilitated by opening a Φ4 air hole. At the same time, the casting sand core 3 is made of low gas emission (gas emission is less than 12.3 ml / g) and high strength (strength is greater than 4.8 MPA) coated sand, which effectively prevents the casting sand core 3 from floating and bending deformation, and obtains a casting with uniform wall thickness.
[0025] In this embodiment, an elastic restoring device 23 is provided between the first pressing plate 7 and the second pressing plate 8. The elastic restoring device 23 includes a spring, and both ends of the spring are respectively fixedly connected to the first pressing plate 7 and the second pressing plate 8. By providing the elastic restoring device 23, it is convenient for the first pressing plate 7 and the second pressing plate 8 to return to their original positions, which is convenient for the next use.
[0026] In this embodiment, the second pressure plate 8 includes an inclined plate 24 and a straight plate 25 fixedly connected to the inclined plate 24. The push rod 11 is perpendicular to the surface of the straight plate 25. An open groove 26 is provided on the straight plate 25 for the push rod 11 to pass through, which can provide movement space for the push rod 11 when the second pressure plate 8 is compressed.
[0027] In this embodiment, a support cavity 27 with an upper end opening is formed on the upper side of the support platform 6, and the cooling capsule 5 is installed in the support cavity 27. A sandblasting tube 28 and a negative pressure sand suction tube 29 are installed on the side of the support cavity 27. Before pouring, fine sand is sprayed into the support cavity 27 to facilitate the positioning of the cooling capsule 5. When the sand core is taken out, the fine sand is sucked out by the negative pressure sand suction tube 29, which can also facilitate the removal of the cooling capsule 5 without damaging it. By setting fine sand for filling, heat transfer can also be facilitated.
[0028] In this embodiment, the beam tube body 1 is made of ductile iron material, and double spiral reinforcement ribs are arranged on the inner side of the beam tube body 1. The new material of QT900-5 high-grade ductile iron is selected, with a tensile strength of 900MPA, a yield strength of 560MPA, and an elongation of 5%. The mechanical indexes are 40-50% higher than the three mechanical indexes of the original material QT600-3. The wall thickness of the tube beam is reduced to the maximum extent, and double spiral reinforcement ribs are arranged on the inner wall of the tube beam to generate sufficient bending strength while ensuring that the main wall thickness of the tube beam is as small as possible, so as to reduce the overall tube wall thickness from 9mm to 7mm, and reduce the weight by 23-25%.
[0029] In this embodiment, two Φ30mm bosses 30 are added on both sides and the upper part of the tube beam body, and a hole M10 is drilled on the boss 30 for installing a pipe clamp, which saves components such as a lubricating oil pipe bracket, a brake air pipe bracket, and a taillight bracket, and increases the maintenance space of this part, making it easier to maintain the vehicle.
[0030] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.
Claims
1. A beam tube casting mold for a vehicle, the beam tube comprising a beam tube body (1), characterized in that: An outer covering member (2) is arranged on the outer side of the beam tube body (1), a casting sand core (3) is arranged on the inner side of the beam tube body (1), a cavity is formed on the inner side of the casting sand core (3), a cooling assembly (4) is arranged on the inner side of the casting sand core (3), and the cooling assembly (4) is adjacent to the position of the V-push boss (32) of the beam tube body (1); the cooling assembly (4) includes a V-shaped cooling bag (5), and the cooling bag (5) is supported on the casting sand core by a support platform (6). (3), the support platform (6) is fixed on the inner side of the casting sand core (3), the two ends of the cooling bag (5) are respectively fixed with a first pressing plate (7) and a second pressing plate (8), there is an angle between the first pressing plate (7) and the second pressing plate (8), the second pressing plate (8) is connected to a pushing component (9), and the cooling bag (5) can be compressed by the pushing component (9); the cooling bag (5) is connected to the liquid exchange tank on the outside of the casting sand core (3) through a liquid exchange pipe (10).
2. A vehicle beam tube casting mold according to claim 1, characterized in that: The pushing assembly (9) comprises a push rod (11), a push plate (12), a bracket (13), a roller (14), a cam (15) and a rotation control mechanism (16); the bracket (13) is fixed on the inner side of the casting sand core (3); the cam (15) and the roller (14) are rotationally connected to the bracket (13) at the same time; one end of the push rod (11) is hinged to the roller (14), and the other end is slidably connected to the bracket (13); the push plate (12) is fixed to the tail of the push rod (11); the rotation control mechanism (16) controls the rotation of the cam (15); the surface of the cam (15) abuts against the roller (14); the roller (14) drives the push rod (11) to move; the push rod (11) drives the second pressing plate (8) to rotate through the push plate (12) to compress the cooling bag (5).
3. A vehicle beam tube casting mold according to claim 2, characterized in that: The rotation control mechanism (16) comprises a rotating shaft (17), a gear (18), a rack (19), a slide bar (20) and a pressure bar (21); the cam (15) is rotationally connected to the bracket (13) via the rotating shaft (17); the rotating shaft (17) is coaxially connected with the gear (18); the gear (18) is meshed with the vertically arranged rack (19); the slide bar (20) is fixed to the upper end of the rack (19); the lower end of the pressure bar (21) forms a slot that cooperates with the slide bar (20).
4. A vehicle beam tube casting mold according to claim 3, characterized in that: The casting sand core (3) is provided with an exhaust hole (22), and the pressure rod (21) is inserted into the exhaust hole (22).
5. The vehicle beam tube casting mold according to claim 4, characterized in that: An elastic restoring device (23) is provided between the first pressing plate (7) and the second pressing plate (8), and the elastic restoring device (23) comprises a spring, and two ends of the spring are respectively fixedly connected to the first pressing plate (7) and the second pressing plate (8).
6. The vehicle beam tube casting mold according to claim 2, characterized in that: The second pressing plate (8) comprises an inclined plate (24) and a straight plate (25) fixedly connected to the inclined plate (24); the push rod (11) is perpendicular to the surface of the straight plate (25); and an open groove (26) is provided on the straight plate (25) for the push rod (11) to pass through.
7. A vehicle beam tube casting mold according to any one of claims 1 to 6, characterized in that: A support cavity (27) with an upper end opening is formed on the upper side of the support platform (6), the cooling bag (5) is installed in the support cavity (27), and a sandblasting tube (28) and a negative pressure sand suction tube (29) are simultaneously installed on the side of the support cavity (27).
8. A vehicle beam tube casting mold according to any one of claims 1 to 6, characterized in that: The beam tube body (1) is made of ductile iron material, and double spiral reinforcement ribs are arranged on the inner side of the beam tube body (1).
9. A vehicle beam tube casting mold according to any one of claims 1 to 6, characterized in that: Two Φ30 mm bosses (30) are added to both sides and the upper part of the pipe beam body, and holes M10 are drilled on the bosses (30) for installing pipe clamps.