阅读说明：本技术 水道板低压铸造工艺 (Low-pressure casting process of water channel plate ) 是由 徐喜红 宋磊 于 2019-10-08 设计创作，主要内容包括：本发明提供一种水道板低压铸造工艺,其包括：提供一低压铸造模具,该模具具有与上述水道板的结构相对应的型腔,所述型腔中具有一砂芯,所述砂芯的结构与所述水道的水道腔的结构相对应；向所述低压铸造模具的型腔中加入压铸料,并在低压、高温的条件下进行压铸；压铸成型后,在高温条件下将型腔中的砂芯烘烤成细灰,并将成型的水道板与烤成细灰的砂芯分离。本发明的水道板低压铸造工艺采用一体压铸成型的方式,能够制造其上具有斜坡结构的水道板,其相比现有的摩擦焊工艺,大大降低了因为摩擦工艺造成的漏水风险,在方便水道板一体成型铸造的同时,还提高了水道板的质量,提高了产品的安全性。(The invention provides a low-pressure casting process of a water channel plate, which comprises the following steps: providing a low-pressure casting die, wherein the die is provided with a cavity corresponding to the structure of the water channel plate, and a sand core is arranged in the cavity and corresponds to the structure of the water channel cavity of the water channel; adding a die casting material into a cavity of the low-pressure casting die, and performing die casting under the conditions of low pressure and high temperature; and after die-casting forming, baking the sand core in the cavity into fine ash under a high-temperature condition, and separating the formed water channel plate from the sand core baked into the fine ash. The low-pressure casting process of the water channel plate adopts an integral die-casting forming mode, can manufacture the water channel plate with the slope structure, greatly reduces the water leakage risk caused by the friction process compared with the prior friction welding process, is convenient for the integral forming casting of the water channel plate, improves the quality of the water channel plate and improves the safety of products.)

1. a low-pressure casting process of a water channel plate is characterized in that,

the structure of the water channel plate suitable for the low-pressure casting process of the water channel plate is as follows: the water channel structure comprises a plate body, wherein a water channel which extends out of the surface of the plate body and is hollow is arranged on the plate body, a slope structure is arranged on the water channel, and the slope structure enables the water channels on two sides to have a height difference;

The low-pressure casting process of the water channel plate comprises the following steps:

providing a low-pressure casting die, wherein the die is provided with a cavity corresponding to the structure of the water channel plate, and a sand core is arranged in the cavity and corresponds to the structure of the water channel cavity of the water channel;

Adding a die casting material into a cavity of the low-pressure casting die, and performing die casting under the conditions of low pressure and high temperature;

And after die-casting forming, baking the sand core in the cavity into fine ash under a high-temperature condition, and separating the formed water channel plate from the sand core baked into the fine ash.

2. The low-pressure casting process of the water channel plate according to claim 1, wherein the water channel is a U-shaped water channel, and the corresponding sand core is a U-shaped sand core.

3. The waterway plate low-pressure casting process of claim 2, wherein the slope structures are distributed on the U-shaped arms of the U-shaped sand cores in a left-right symmetrical manner.

4. the low-pressure casting process of the water channel plate as claimed in claim 2, wherein a plurality of supporting points are further arranged on the U-shaped sand core.

5. The waterway plate low-pressure casting process of claim 4, wherein a plurality of support points are distributed on the left and right sides and the front and rear ends of the U-shaped sand core.

6. The water channel plate low-pressure casting process according to claim 1, wherein the height of the cavity is at least 15mm, the height of the sand core is at least 6mm, the distance between the upper surface of the sand core and the inner side wall of the cavity is at least 4.5mm, and the distance between the lower surface and the inner side wall of the cavity is at least 4.5 mm.

7. The low-pressure casting process of the water channel plate as claimed in claim 1, wherein the die-cast material is an aluminum alloy.

8. the low-pressure casting process of a water channel plate according to claim 1, wherein the low pressure ranges from: 0.02-0.10MPa, and the high temperature range is as follows: 720 ℃ and 800 ℃.

9. The low-pressure casting process of the water channel plate as claimed in claim 1, wherein the sand core baked into fine ash in the formed water channel plate is flushed or blown out by high-pressure water flow or air flow.

Technical Field

The invention relates to the technical field of wireless charging, in particular to a low-pressure casting process of a water channel plate.

Background

with the development of scientific technology and the current situation of coping with environmental problems, new energy automobiles have been rapidly developed in recent years. An electric automobile in the new energy automobile adopts a high-energy-density battery pack as a power source and realizes electric energy conversion by utilizing clean energy.

At present, a battery pack of an electric vehicle mainly depends on a charging pile and is charged in a wired mode, but the convenience and the universality of the wired charging mode are limited to a certain extent. Therefore, the existing electric vehicle can be charged by adopting a wireless charging system.

In the existing wireless charging system for the electric automobile, a receiving device is installed at a new energy automobile chassis position, and due to the limitation of the new energy automobile chassis space, the receiving device needs to keep a specified distance from a ground transmitting device, so that the height and the size of a receiving end device need to be strictly controlled by the new energy automobile.

the existing receiving device has a water channel plate for heat dissipation, and a slope structure needs to be arranged on a water channel of the water channel plate to facilitate the arrangement of internal devices due to the consideration of thinning design. However, in the current water channel plate production process, the water channel mechanism is mainly formed by a friction welding mode, but the mode has high operation requirements, water leakage is easily caused, the danger is very high, even electric leakage and fire ignition occur, and serious people can cause the recall of the automobile.

Therefore, it is necessary to provide a further solution to the above-mentioned problems.

Disclosure of Invention

The invention aims to provide a low-pressure casting process of a water channel plate, which overcomes the defects in the prior art.

In order to solve the technical problems, the technical scheme of the invention is as follows:

A low-pressure casting process of a water channel plate is characterized in that,

The structure of the water channel plate suitable for the low-pressure casting process of the water channel plate is as follows: the water channel structure comprises a plate body, wherein a water channel which extends out of the surface of the plate body and is hollow is arranged on the plate body, a slope structure is arranged on the water channel, and the slope structure enables the water channels on two sides to have a height difference;

The low-pressure casting process of the water channel plate comprises the following steps:

Providing a low-pressure casting die, wherein the die is provided with a cavity corresponding to the structure of the water channel plate, and a sand core is arranged in the cavity and corresponds to the structure of the water channel cavity of the water channel;

adding a die casting material into a cavity of the low-pressure casting die, and performing die casting under the conditions of low pressure and high temperature;

And after die-casting forming, baking the sand core in the cavity into fine ash under a high-temperature condition, and separating the formed water channel plate from the sand core baked into the fine ash.

As an improvement of the low-pressure casting process of the water channel plate, the water channel is a U-shaped water channel, and the corresponding sand core is a U-shaped sand core.

As an improvement of the low-pressure casting process of the water channel plate, the slope structures are distributed on the U-shaped arms of the U-shaped sand cores in a bilateral symmetry mode.

As an improvement of the low-pressure casting process of the water channel plate, a plurality of supporting points are further arranged on the U-shaped sand core.

As an improvement of the low-pressure casting process of the water channel plate, a plurality of supporting points are distributed on the left side, the right side, the front end and the rear end of the U-shaped sand core.

As an improvement of the low-pressure casting process of the water channel plate, the height of the cavity is at least 15mm, the height of the sand core is at least 6mm, the distance between the upper surface of the sand core and the inner side wall of the cavity is at least 4.5mm, and the distance between the lower surface of the sand core and the inner side wall of the cavity is at least 4.5 mm.

As an improvement of the low-pressure casting process of the water channel plate, the die casting material is aluminum alloy.

As an improvement of the low-pressure casting process of the water channel plate, the low pressure range is as follows: 0.02-0.10MPa, and the high temperature range is as follows: 720 ℃ and 800 ℃.

As an improvement of the low-pressure casting process of the water channel plate, the sand core baked into fine ash in the formed water channel plate is flushed out or blown out by high-pressure water flow or air flow.

compared with the prior art, the invention has the beneficial effects that: the low-pressure casting process of the water channel plate adopts an integral die-casting forming mode, can manufacture the water channel plate with the slope structure, greatly reduces the water leakage risk caused by the friction process compared with the prior friction welding process, is convenient for the integral forming casting of the water channel plate, improves the quality of the water channel plate and improves the safety of products.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a perspective view of a duct board suitable for use in the low-pressure casting process of the present invention;

Fig. 2 is a perspective view of a sand core used in the low-pressure casting process of the waterway plate of the present invention.

Detailed Description

the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

as shown in fig. 1, the structure of the water channel plate suitable for the low-pressure casting process of the water channel plate of the invention is as follows: the method comprises the following steps: a plate body 1. The plate body 1 can be made of aluminum alloy, and correspondingly, the die-casting material adopted in the low-pressure casting process of the water channel plate is also made of aluminum alloy.

the inside water course that is provided with of plate body 1, this water course all extends to the other end from the one end of plate body 1 in length direction and width direction. The water channel opening 11 of the water channel is arranged at one end of the plate body 1. Therefore, the external refrigerant flows into the water channel from one water channel opening 11, takes heat away through heat exchange, and flows out from the other water channel opening 11.

In one embodiment, the water channel is a boss 12 extending from the bottom surface of the plate body 1, and the boss 12 is hollow to form the water channel. The boss 12 is U-shaped, one end of the U-shaped boss 12 is communicated with a water inlet port, and the other end of the U-shaped boss is communicated with a water outlet port.

A first containing cavity 13 is formed on one surface of the plate body 1, and a second containing cavity 14 is formed on the other surface of the plate body. The first receiving cavity 13 is used for realizing a stacked arrangement of two PCBAs (not shown), and the second receiving cavity 14 is used for realizing a stacked arrangement of coils and magnetic materials, so that a thinning design is realized.

The bottom of the first accommodating cavity 13 is provided with a step structure 131, and correspondingly, the water channel is provided with a slope structure corresponding to the step structure 131, and the slope structure enables the water channels on the two sides to have a height difference. The step structure 131 divides the first receiving cavity 13 into a first cavity 132 and a second cavity 133. The first cavity 132 is used for realizing the installation and fixation of one PCBA, and the second cavity 133 is used for realizing the installation and fixation of another PCBA. Correspondingly, the bottom surfaces of the first cavity 132 and the second cavity 133 are further provided with protruding locking screw holes 134, and the PCBA is fixed in the corresponding locking screw holes 134 by screw locking. And the plate body 1 in the corresponding area is thinner due to the arrangement of the cavity, and the protruding locking screw is beneficial to realizing fastening connection of the screw.

In combination with the above-described waterway design of the U-shaped boss 12, the first cavity 132 and the second cavity 133 are defined by the U-shaped boss 12. A third cavity 135 is also defined between the boss 12 defining the second cavity 133 and the side wall of the waterway plate, and the third cavity 135 can be used for receiving and mounting a clinch nut connected to the PCBA. Further, the top surface of the boss 12 defining the second cavity 133 also forms a mounting surface 121, and the mounting surface 121 may serve as a mounting surface for a heat generating device such as a mos device (not shown).

the second accommodating cavity 14 is disposed corresponding to the first cavity 132 and disposed in a staggered manner with the second cavity 133, so as to facilitate the reasonable arrangement of coils and magnetic materials (not shown), and further achieve the overall thinning.

As shown in fig. 2, for the above-structured water channel plate, the low-pressure casting process of the water channel plate of the present invention includes:

Providing a low-pressure casting die, wherein the die is provided with a die cavity corresponding to the structure of the water channel plate, a sand core 2 is arranged in the die cavity, and the structure of the sand core 2 corresponds to the structure of the water channel cavity of the water channel;

Adding a die casting material into a cavity of the low-pressure casting die, and performing die casting under the conditions of low pressure and high temperature;

After the die-casting molding, the sand core 2 in the cavity is baked into fine ash under the high-temperature condition, and the molded waterway plate is separated from the sand core 2 baked into the fine ash.

As described above, when the waterway is a U-shaped waterway, the corresponding sand core 2 is also a U-shaped sand core 2. The slope structures 21 corresponding to the sand cores 2 are symmetrically distributed on the U-shaped arms of the U-shaped sand cores. Thus, the sand core 2 can form a water channel cavity of a water channel in the water channel plate during die-casting.

In order to keep the position of the sand core 2 fixed during the die-casting process, a plurality of supporting points 22 are further arranged on the U-shaped sand core 2, and any supporting point 22 can be a small cylinder which is vertically formed on the sand core 2. In one embodiment, the plurality of supporting points 22 are distributed on the left and right sides and the front and rear ends of the U-shaped sand core 2, specifically, one supporting point 22 is provided on each of the left and right sides of the U-shaped sand core 2, one supporting point 22 is provided on the front end, and one supporting point 22 is provided on each of the end portions of the two U-shaped arms.

Further, since the support points 22 are provided, small holes communicating with the outside are formed in the raceway plate. And a conical aluminum block made of the same material is required to be plugged into the formed small hole and welded and polished to seal the channel.

in order to ensure that the water channel plate manufactured by the low-pressure casting process of the water channel plate meets the required size, the height of the cavity is at least 15mm, the height of the sand core 2 is at least 6mm, the distance between the upper surface of the sand core 2 and the inner side wall of the cavity is at least 4.5mm, and the distance between the lower surface of the sand core 2 and the inner side wall of the cavity is at least 4.5 mm. So make, the wall thickness of the water channel plate of die-casting shaping is 4.5mm at least, and the water channel plate of this size can also satisfy the demand of intensity when realizing the attenuate design.

The low pressure ranges are: 0.02-0.10MPa, and the high temperature range is as follows: 720 ℃ C

The sand core 2 baked into fine ash in the formed water channel plate is flushed out or blown out through high-pressure water flow or air flow, and correspondingly, the sand core 2 baked into fine ash can be flushed out or blown out through a high-pressure water gun or a high-pressure air gun.

In conclusion, the low-pressure casting process of the water channel plate adopts an integral die-casting forming mode, the water channel plate with the slope structure can be manufactured, compared with the existing friction welding process, the water leakage risk caused by the friction process is greatly reduced, the water channel plate is convenient to integrally form and cast, the quality of the water channel plate is improved, and the safety of products is improved.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.