Water cooled mold for casting aluminum alloy wheels and manufacturing method thereof

Abstract

The present invention provides a water cooled mold for casting aluminum alloy wheels and a manufacturing method thereof. The water cooled mold is provided with first-type water cooling channels with high heat exchange efficiency and second-type water cooling channels with low heat exchange efficiency. The first-type water cooling channels are concave grooves through which cooling water flows, and a cooling surface of the mold is in contact with open surfaces of the concave grooves. The second-type water cooling channels are grooves with stainless steel pipes, and the stainless steel pipes are in contact with the cooling surface of the mold. The second-type water cooling channels are installed on mold portions corresponding to wheel window positions of a cavity, and the first-type water cooling channels are installed on mold portions corresponding to spokes, flanges and rims of the cavity. The water cooled mold of the present invention is capable of accurately controlling a direction and a range of cooling within a three-dimensional space; the use of a thermal insulating groove is omitted so that the mold can be manufactured more simply and the service life of the mold can be prolonged; the cooling efficiency is high and resources are saved; and the whole device is simple to manufacture and low in cost.

Claims

1. A water cooled mold for casting aluminum alloy wheels, characterized in that: the water cooled mold is provided with first-type water cooling channels with high heat exchange efficiency and second-type water cooling channels with low heat exchange efficiency; the first-type water cooling channels with high heat exchange efficiency are concave grooves, the concave grooves are set to allow cooling water to flow through, and a cooling surface of the mold is in contact with open surfaces of the concave grooves; the second-type water cooling channels with low heat exchange efficiency are grooves with stainless steel pipes, and the stainless steel pipes are in contact with the cooling surface of the mold; the second-type water cooling channels with low heat exchange efficiency are installed on mold portions corresponding to wheel window positions of a cavity, and the first-type water cooling channels with high heat exchange efficiency are installed on mold portions corresponding to spokes, flanges and rims of the cavity.

2. The water cooled mold according to claim 1, characterized in that the grooves with the stainless steel pipes in the second-type water cooling channels with low heat exchange efficiency are selected from concave grooves, L-shaped grooves and triangular grooves.

3. The water cooled mold according to claim 1, characterized in that the surface roughness of the cooling surface of the first-type water cooling channels with high heat exchange efficiency is not less than Ra 12.5.

4. The water cooled mold according to claim 1, characterized in that the surface roughness of the cooling surface of the first-type water cooling channels with high heat exchange efficiency is not less than Ra 12.5, wherein the surface roughness of the cooling surface of the first-type water cooling channels with high heat exchange efficiency is measured as per GB/T 1031-2009.

5. The water cooled mold according to claim 1, characterized in that the wall thickness of the concave grooves of the first-type water cooling channels with high heat exchange efficiency is 6 to 8 mm.

6. The water cooled mold according to claim 1, characterized in that the distance between the cooling surface of the concave grooves of the first-type water cooling channels with high heat exchange efficiency and the seal weld grooves is 2 to 4 mm.

7. The water cooled mold according to claim 1, characterized in that the stainless steel pipes and the grooves are fixed by means of spot welding in the second-type water cooling channels with low heat exchange efficiency.

8. The water cooled mold according to claim 1, characterized in that the surface roughness of the cooling surface of the first-type water cooling channels with high heat exchange efficiency is Ra 12.5 to Ra 50.

9. The water cooled mold according to claim 1, characterized in that the surface roughness of the cooling surface of the first-type water cooling channels with high heat exchange efficiency is Ra 12.5 to Ra 50, wherein the surface roughness of the cooling surface of the first-type water cooling channels with high heat exchange efficiency is measured as per GB/T 1031-2009.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) In the following, embodiments of the present invention are described in detail in combination with figures, wherein:

(2) FIG. 1 is a schematic diagram of the profile of a wheel.

(3) FIG. 2 is a design of a traditional water cooling channel.

(4) FIG. 3 is an improved design of the present invention.

(5) In the figures, numeric symbols are as follows: 1-concave groove, 2-water channel, 3-cooling surface, 4-stainless steel pipe, 5-seal weld groove, 6-key dimension I, 7-key dimension II, 8-key dimension III, 9-L-shaped groove, 10-triangular groove, 11-mold, and 12-slot.

DETAILED DESCRIPTION OF THE INVENTION

(6) Embodiment 1

(7) A cooling design method and device capable of effectively controlling cooling direction and range of the present invention comprise concave grooves 1, stainless steel pipes 4, L-shaped grooves 9, triangular grooves 10 and a mold 11.

(8) According to the drawing, a cooling surface 3 used to place the concave grooves 1 or the L-shaped grooves 9 or the triangular grooves 10 is processed on the mold 11, and a key dimension 16, a key dimension 117 and a key dimension 1118 are controlled as required.

(9) The concave grooves 1 or the L-shaped grooves 9 or the triangular grooves 10 used to control the planar cooling range are processed, a plurality of stainless steel pipes 4 with the same radian as windows of a product are made, and the center diameter of the stainless steel pipes 4 is equal to that of water channels 2.

(10) The prepared stainless steel pipes 4 are placed into the concave grooves 1 or the L-shaped grooves 9 or the triangular grooves 10 according to the distribution of the windows of a product and fixed by spot welding.

(11) Finally, the concave grooves 1 or the L-shaped grooves 9 or the triangular grooves 10 are fitted on the cooling surface 3 of the mold 11, and sealed and fixed by full weld in seal weld grooves 5. The welding process is required to be performed after the mold is heated to 400 C., and the mold is required to be kept warm and cooled after welding.

(12) The present invention relates to a cooling design method and device capable of effectively controlling cooling direction and range, which can be widely used in various metal mold casting fields.

(13) The present invention discloses a cooling design method and device capable of effectively controlling cooling direction and range. Concave grooves 1 or L-shaped grooves 9 or triangular grooves 10 are used to control the planar action range and direction of cooling channels. The radial action range of the cooling channels is controlled by placing stainless steel pipes 4 into the concave grooves 1 or the L-shaped grooves 9 or the triangular grooves 10.

(14) The cooling design method and device capable of effectively controlling the cooling direction and range of the present invention are not limited to the content of the present invention and the contents of specific embodiments. Other design manners obtained according to the enlightenment of the content of the present invention shall fall into the protection scope of the present invention.