Automobile hub casting device

Abstract

The utility model relates to the technical field of casting equipment, in particular to an automobile hub casting device which comprises an upper mold, a lower mold and a driving device for controlling the upper mold to vertically move, and further comprises a base for bearing the lower mold, an open mounting cavity is formed in the upper end of the base, a step is arranged at the upper end of the mounting cavity, and the lower end of the mounting cavity communicates with negative pressure equipment. An annular sealing cover is detachably installed at the upper end of the step, the lower die is vertically installed on the step in a sliding mode, and a sealing ring attached to the side wall of the step is arranged on the side wall of the lower die. In the mold closing process, the upper mold makes contact with the end face of the lower mold, the low-pressure lower mold descends till the lower mold abuts against the step end face, the lower mold descends, impact potential energy is released, and impact damage is reduced. Therefore, the lifting speed of the upper mold can be properly increased, and the mold closing time is shortened, so that the casting production time is shortened, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of casting equipment, in particular to an automobile wheel hub casting device. BACKGROUND

[0002] A wheel hub is a part of a wheel center for installing an axle. There are two kinds of manufacturing methods for automobile wheel hubs, namely, casting and forging. Casting is divided into three kinds, namely, gravity casting, low-pressure casting and casting spinning. The gravity casting process is simple, and only needs to pour liquid metal into a casting mold to be cooled and formed. The low-pressure casting is to increase a certain pressure during the liquid metal injection process.

[0003] However, no matter which kind of casting, the process of combining and separating the upper mold and the lower mold will be experienced. In the combining process, the upper mold is lowered to abut against the upper mold under the traction of the driving device. The upper mold has a slow descending speed, consumes a long time and affects the production capacity. If the descending speed of the upper mold is fast, hard impact and collision will occur when the upper and lower molds are combined and contacted, and thus, damage is caused.

[0004] Therefore, the application provides an automobile wheel hub casting device which improves the production efficiency on the basis of reducing the hard impact. CONTENT OF THE INVENTION

[0005] The application aims at providing an automobile wheel hub casting device to solve the problems in the prior art.

[0006] In order to achieve the above-mentioned purpose, the application adopts the following technical scheme:

[0007] The automobile wheel hub casting device comprises an upper mold, a lower mold and a driving device for vertically moving the upper mold, further comprises a base for bearing the lower mold, the base is provided with an open mounting cavity at the upper end, the mounting cavity is provided with a step at the upper end, the mounting cavity is communicated with a negative pressure device at the lower end, the upper end of the step is detachably provided with a ring-shaped cover, the lower mold is vertically slidably installed on the step, the side wall of the lower mold is provided with a sealing ring matched with the side wall of the step, and the lower mold is spirally provided with a cooling pipe.

[0008] Preferably, the lower mold is provided with a mounting frame at the side, the mounting frame is overlapped on the step and vertically moves along the step, and the sealing ring covers the mounting frame.

[0009] Preferably, the base is provided with an embedding groove at the end face along the step port, and the cover is embedded in the embedding groove.

[0010] Preferably, the upper end of the step is sealed, the step is provided with an opening at one side, and a sealing plate is detachably installed at the opening.

[0011] Preferably, the lower mold is provided with a plurality of shaft sleeves arranged at the periphery of the bottom end, and the mounting cavity is provided with a guide column corresponding to the shaft sleeve at the bottom wall.

[0012] Preferably, the installation cavity is provided with an elastic member abutting against the lower die.

[0013] Preferably, the inlet and outlet of the cooling pipe are communicated with corrugated pipes, the corrugated pipes penetrating the base from the side wall of the installation cavity, and the two corrugated pipes are connected with the refrigerating machine through the delivery pump.

[0014] Preferably, the upper die and the lower die are both provided with a buffer plate at one end.

[0015] Compared with the prior art, the automobile hub casting device provided by the application has the following beneficial effects:

[0016] In use, a certain pressure gas is injected into the installation cavity through the negative pressure equipment, so that the upper die can be suspended at the top end within the moving range of the step when at rest. During the closing process, the end surface of the upper die contacts the end surface of the lower die, and the lower die descends until the lower die abuts against the end surface of the step, and the lower die descends to release the impact potential energy and reduce the impact damage. In this way, the lifting speed of the upper die can be appropriately increased, the closing time is reduced, the casting production time is shortened, and the production efficiency is improved.

[0017] Other advantages, objects, and features of the application will be set forth in part in the following specification taken in conjunction with the accompanying drawings; and in part will become apparent to those skilled in the art upon examination of the following specification and drawings. It is intended that the application be practiced not only in the examples, but in the claims now or hereafter drawn. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a perspective view of the application.

[0019] Figure 2 is a sectional view of the application, in which the cover is embedded in the embedding groove.

[0020] Figure 3 is a sectional view of the application. Figure 2 is a partial view of the application at A.

[0021] Figure 4 is a sectional view of the application, in which the cover is embedded in the embedding groove.

[0022] Figure 5 is a partial view of the application at B. Figure 4

[0023] In the drawings: 1, base; 2, upper die; 3, lower die; 4, pouring pipe; 5, hydraulic rod; 6, cover; 7, mounting frame; 8, sealing ring; 9, cooling pipe; 10, negative pressure pipe; 11, step; 12, corrugated pipe; 13, cover plate; 14, plug. DETAILED DESCRIPTION

[0024] The application will be described below with reference to the accompanying drawings and examples of the application. Figures 1-5 ​The technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are only some of the embodiments of the present application, not all.

[0025] To solve the problems in the prior art, the present embodiment provides an automobile wheel hub casting device, which comprises an upper mold 2, a lower mold 3, and a driving device for controlling the vertical movement of the upper mold 2, and further comprises a base 1 for bearing the lower mold 3, wherein the upper end of the base 1 is provided with an open mounting cavity, the upper end of the mounting cavity is provided with a step 11, the lower end of the mounting cavity is communicated with a negative pressure device, the upper end of the step 11 is detachably provided with an annular cover 6, and the lower mold 3 is vertically slidably installed on the step 11. The side wall of the lower mold 3 is provided with a sealing ring 8 abutting against the side wall of the step 11, and the lower mold 3 is spirally provided with a cooling pipe 9.

[0026] Principle details of the present embodiment:

[0027] The automobile wheel hub casting device comprises an upper mold 2, a lower mold 3, and a driving device for controlling the vertical movement of the upper mold 2, wherein the driving device is two groups of hydraulic rods 5, the two groups of hydraulic rods 5 are symmetrically distributed on the two sides of the upper mold 2, the extension end of the hydraulic rod 5 is connected with the side edge of the hydraulic rod 5, and the upper mold 2 is lifted and lowered by the hydraulic rod 5. The lower mold 3 is spirally provided with a cooling pipe 9, the cooling pipe 9 is connected with a refrigerator, and is used for cooling the casting. The side edge of the upper mold 2 is provided with a pouring pipe 4, which is used for injecting liquid metal. The lower mold 3 is provided with a sealing groove at the periphery of the mold cavity, and the upper mold 2 is provided with a sealing gasket matched with the sealing groove. When the mold is closed, the sealing gasket is embedded in the sealing groove, so as to increase the sealing property of the mold cavity.

[0028] The base 1 for bearing the lower mold 3 is further included. The upper end of the base 1 is provided with a mounting cavity, and the upper end of the mounting cavity is open. The upper end of the mounting cavity is provided with a step 11, the lower end of the mounting cavity is inserted with a negative pressure pipe 10, and the negative pressure pipe 10 is communicated with a negative pressure device. The upper end of the step 11 is detachably provided with an annular cover 6, the lower mold 3 is vertically slidably installed on the step 11, and the side wall of the lower mold 3 is provided with a sealing ring 8 abutting against the side wall of the step 11, so as to increase the air tightness between the moving part of the lower mold 3 and the side wall of the step 11 and prevent air leakage. The step 11 is provided with a circle of buffer pads for relieving the impact force between the lower mold 3 and the step 11.

[0029] During installation, the lower mold 3 is placed on the step 11, and then the cover 6 is closed, the cover 6 is fastened on the base 1 by fasteners, and the upper end of the step 11 is sealed.

[0030] In use, a certain pressure gas is injected into the installation cavity through the negative pressure device, so that the upper mold 2 can be suspended at the top end of the moving range of the step 11 when at rest. The hydraulic rod 5 is retracted, the upper mold 2 is lowered, and the mold closing begins. During the mold closing process, the upper mold 2 contacts the end face of the lower mold 3, and the lower mold 3 is lowered under low pressure until the lower mold 3 abuts against the end face of the step 11. At this time, the upper mold 2 and the lower mold 3 are tightly attached. Then the liquid metal is injected and the casting is carried out. After casting, the refrigerator is started and the refrigeration is gradually carried out. Then the hydraulic rod 5 is extended, the upper mold 2 is moved upward, and the mold is opened. After the upper mold 2 and the lower mold 3 are separated, the lower mold 3 is lifted by the high-pressure gas in the installation cavity. The casting is taken out, and the casting process is completed.

[0031] During the entire mold closing process, the upper mold 2 is lowered onto the lower mold 3 under low pressure, and the lower mold 3 is lowered to release the impact potential energy, reducing the impact damage. In this way, the lifting speed of the upper mold 2 can be appropriately increased, the mold closing time is reduced, and the casting production time is shortened, thereby improving the production efficiency.

[0032] In this embodiment, the cover 6 is tightly mounted on the base 1 through a countersunk screw, so that the cover 6 can be detachably mounted on the base 1. The cover 6 blocks the port of the step 11 to limit the vertical movement of the top end of the lower mold 3, and the cover 6 is removed to disassemble and assemble the lower mold 3 and related components.

[0033] In this embodiment, when the lower mold 3 is located at the top end of the vertical stroke of the step 11, the mold cavity port of the lower mold 3 is located above the cover 6, and the mold cavity port leaks out, which facilitates the gradual side lifting and improves the convenience of casting removal.

[0034] In this embodiment, a gas pressure sensor is arranged in the installation cavity, and the gas pressure sensor is electrically connected to the negative pressure device for real-time monitoring and control of the gas pressure in the installation cavity to ensure the floating force and buffer resistance of the lower mold 3.

[0035] In a further embodiment of the present scheme, the lower mold 3 is provided with a mounting bracket 7 which is lapped on the step 11 and vertically moves along the step 11, and a sealing ring 8 covers the mounting bracket 7. Through the mounting bracket 7, the lower mold 3 can vertically move within the range of the step 11 without changing the shape design of the lower mold 3 itself.

[0036] In a further embodiment of the present scheme, the end face of the base 1 is provided with a recess along the port of the step 11, and the cover 6 is embedded in the recess. The cover 6 is completely embedded in the end face of the base 1, which is a hidden design, making the whole more beautiful.

[0037] In a further embodiment of the present application, another mounting structure of the lower mold 3 is provided: the step 11 is sealed, i.e. a structure similar to the cover 6 is fixedly connected to the base 1 to form a ring groove. The step 11 is opened on one side, and the opening side of the step 11 does not correspond to the hydraulic rod 5 to avoid interference during disassembly and assembly of the lower mold 3. A sealing plate 13 is detachably mounted at the opening of the step 11, and the upper end of the sealing plate 13 is provided with a eave capable of being buckled against the end face of the mounting bracket 7. The sealing plate 13 cooperates with the sealed step 11 to form a closed ring groove.

[0038] During installation, the mounting bracket 7 is inserted from the opening side of the step 11 and placed on the step 11, and then the sealing plate 13 is installed by fasteners, so as to limit the lower mold 3 in the step 11.

[0039] In the present embodiment, reference is made to the accompanying drawings Figure 5 As shown in the drawings, a seven-shaped insertion slot is provided on the lower side of the sealing plate 13 facing the lower mold 3, a seven-shaped insertion block 14 is provided at the opening of the installation slot, and the sum of the height of the insertion block 14 and the mounting bracket 7 is less than the depth of the step 11. The sealing plate 13 is placed at the opening, and the insertion block 14 is inserted into the insertion slot, so as to limit and pull the sealing plate 13, prevent the mounting bracket 7 from being pressed against the eave of the sealing plate 13 for a long time, and prevent the inner side of the sealing plate 13 from being raised for a long time. At the same time, the provision of the insertion block 14 and the insertion slot can also increase the sealing between the sealing plate 13 and the base 1. The structure of the present embodiment makes the disassembly and assembly of the lower mold 3 more convenient and rapid.

[0040] In a further embodiment of the present application, a plurality of shaft sleeves are arranged around the bottom end of the lower mold 3, and a guide column corresponding to each shaft sleeve is provided on the bottom wall of the installation cavity. The shaft sleeves and the guide columns cooperate to guide the vertical movement of the lower mold 3, so as to avoid deviation and lateral movement of the lower mold 3 during movement and affect the alignment integrity of the mold.

[0041] In a further embodiment of the present application, an elastic member abutting against the lower mold 3 is provided in the installation cavity. The elastic member cooperates with the high-pressure gas to assist the upward movement of the upper mold 2.

[0042] In a further embodiment of the present application, the inlet and outlet of the cooling pipe 9 are both communicated with a bellows 12, the bellows 12 penetrates the base 1 from the side wall of the installation cavity, and the two bellows 12 are connected to the inlet and outlet of the refrigeration machine through a delivery pump. By providing the bellows 12, even if the lower mold 3 can float up and down, the injection and circulation of the cooling liquid in the cooling pipe 9 are not affected.

[0043] In a further embodiment of the present application, the upper mold 2 and the lower mold 3 are both provided with a buffer plate at one end. When the mold is closed, the upper mold 2 is pressed against the buffer plate, which further improves the buffering effect and reduces the damage of the impact object.

[0044] In the present application, the mounting bracket 7, the sealing ring 8, the bellows 12 and other components all have high-temperature resistance.

[0045] The above merely provides the preferred embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent replacements or changes to the technical scheme and the application concept of the present application within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application.

[0046] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. The illustrative description of the above terms in the present specification is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0047] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. An automobile wheel hub casting device, comprising an upper mold (2), a lower mold (3), and a drive device for controlling the vertical movement of the upper mold (2), characterized in that, It also includes a base (1) for supporting the lower mold (3), the upper end of the base (1) is provided with an open mounting cavity, the upper end of the mounting cavity is provided with a step (11), the lower end of the mounting cavity is connected to a negative pressure device, the upper end of the step (11) is detachably installed with an annular cover (6), the lower mold (3) is vertically slidably installed on the step (11), the side wall of the lower mold (3) is provided with a sealing ring (8) that fits against the side wall of the step (11), and a cooling pipe (9) is coiled inside the lower mold (3).

2. The automobile wheel hub casting device according to claim 1, characterized in that, The lower mold (3) is provided with a mounting frame (7) on its side. The mounting frame (7) overlaps on the step (11) and moves vertically along the step (11). The sealing ring (8) covers the mounting frame (7).

3. The automobile wheel hub casting device according to claim 2, characterized in that, The base (1) end face is provided with a groove along the port of the step (11), and the cover (6) is embedded in the groove.

4. The automobile wheel hub casting device according to claim 2, characterized in that, The upper end of the step (11) is sealed, and one side of the step (11) is open, with a sealing plate (13) that can be detachably installed at the opening.

5. The automobile wheel hub casting apparatus according to claim 1, characterized in that, The lower mold (3) has multiple bushings arranged around its bottom edge, and guide posts corresponding to the bushings are provided on the bottom wall of the mounting cavity.

6. The automobile wheel hub casting apparatus according to claim 1, characterized in that, The mounting cavity is provided with an elastic element that abuts against the lower mold (3).

7. The automobile wheel hub casting apparatus according to claim 4, characterized in that, The inlet and outlet of the cooling pipe (9) are connected to a corrugated pipe (12). The corrugated pipe (12) passes through the base (1) from the side wall of the mounting cavity. The two corrugated pipes (12) are connected to the refrigerator via a delivery pump.

8. The automobile wheel hub casting apparatus according to claim 1, characterized in that, Both the upper mold (2) and the lower mold (3) are provided with buffer plates at opposite ends.

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