Continuous casting and continuous forging forming process for aluminum wheel

Patent metadata

Field	Value
Publication number	US-10695828-B2
Application number	US-201816058267-A
Country	US
Kind code	B2
Filing date	Aug 8, 2018
Priority date	Mar 13, 2018
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

Disclosed is a continuous casting and continuous forging forming process for an aluminum wheel. The process combines the advantage of low-pressure filling stability of molten aluminum alloy, and utilizes the strengthening effect of extrusion deformation forging of a side mold locking ring and a pressure module to improve the mechanical properties of an aluminum wheel material to close to the forging level. A mold cavity is sealed by means of the side mold locking ring and a center mold locking taper, and the extrusion forging pressure acts on the surface of the aluminum alloy in the closed mold cavity, so that the requirement of equipment for mold closing tonnage is lowered, and the cost of the equipment is far lower than that of forging equipment and equivalent to that of casting equipment.

First claim

What is claimed is:

1. A continuous casting and continuous forging forming process for an aluminum wheel, comprising low-pressure filling and extrusion forging, wherein the process comprises feeding molten aluminum alloy into a mold assembly until a mold cavity is full, and holding a low pressure for a period of time; lowering a side mold locking ring and a center mold locking taper to completely seal the molten aluminum alloy in the mold cavity, removing the low pressure in a holding furnace, opening forced water cooling on two sides of corresponding spokes of top mold and bottom mold, and after a temperatures of the top mold and the bottom mold are in a liquid-solid coexistence state of the molten aluminum alloy, lowering a top pressure module to implement extrusion deformation strengthening, until the molten aluminum alloy is completely crystallized and solidified; and opening the mold assembly to take the casting out;
the side mold locking ring is fitted with the four side molds through an oblique tapered surface with a tapered angle of 10° to 15°,
the center mold locking taper is fitted with a center sprue through an oblique tapered surface with a tapered angle of 0° to 5°,
the temperatures of the top mold and the bottom mold in the liquid-solid coexistence state of the aluminum alloy are 570° C. to 610° C.,
a lowering speed of the top pressure module is configured to be divided into first low-speed pressurization and then high-speed pressurization, the advancing speed of the low-speed pressurization stage is set to 0 to 0.2 mm/s, and the advancing speed of the high-speed pressurization stage is set to 0.5 to 0.8 mm/s.

2. The continuous casting and continuous forging forming process for an aluminum wheel according to claim 1 , wherein the side mold locking ring is fitted with the four side molds through an oblique tapered surface with a tapered angle of 12° to 15°.

3. The continuous casting and continuous forging forming process for an aluminum wheel according to claim 1 , wherein the center mold locking taper is fitted with a center sprue through an oblique tapered surface with a tapered angle of 0.5° to 5°.

4. The continuous casting and continuous forging forming process for an aluminum wheel according to claim 1 , wherein the temperatures of the top mold and the bottom mold in the liquid-solid coexistence state of the aluminum alloy are 600° C. to 610° C.

5. The continuous casting and continuous forging forming process for an aluminum wheel according to claim 1 , wherein the advancing speed of the low-speed pressurization stage of lowering the pressure block is set to 0.1 to 0.2 mm/s.

6. The continuous casting and continuous forging forming process for an aluminum wheel according to claim 1 , wherein the advancing speed of the high-speed pressurization stage of lowering the pressure block is set to 0.5 to 0.7 mm/s.

Assignees

• Citic Dicastal Co Ltd

Inventors

• Du Dexi
• Zhu Zhihua

Classifications

• B22D18/02 Primary

  Pressure casting making use of mechanical pressure devices, e.g. cast-forging (B22D18/04 takes precedence) · CPC title

• B22D17/002

  using movable moulds (for plastics B29C45/04) · CPC title

• B22C9/28

  for wheels, rolls, or rollers {(B22D15/005 takes precedence)} · CPC title

• B22D18/04 Primary

  Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould · CPC title