The present disclosure relates to a process for stamping and forging the metallic member, in particular, a process for stamping the metallic member with forging thickness of side walls.
A forging process is related to a machining method for applying pressure on the metallic blank by a forging machine to make a deformation of the metallic member with mechanical properties, shape, and size. The as-cast loosen of the metallic member can be removed by the forging process and make the metallic member form a specific shape. Besides, the machine performance of the forged metallic member is greater than the metallic member contained with the same material. The forging process can fall into two types based on the forming method: 1. Open die forging, also called as free forging. Open die forging is the process of deforming a metallic member between upper and lower dies (anvils) by impacting or stamping to obtain a needed forged metallic member. Open die forging can fall into two types: manual forging and mechanical forging. 2. Closed die forging is a metal forming process that compress a piece of metal under high pressure to fill a die with specific shape, which includes die forging, cold heading, rotary forging, squeezing etc. Closed die forging can fall into three types based on the deforming temperature: hot forging, warm forging (lower than recrystallization temperature) and cold forging (with room temperature).
Forging material mainly are carbon steel and alloy steel contained various components, then aluminum, magnesium, titanium, copper and the alloy thereof. The original status of the material is bar stock, cast ingot, metal powder, liquid metal etc. Forging process includes metallic member design, forging die design, blank preparation, pretreatment and tribological treatment, forging and stamping (stamping; plastic deformation), posttreatment of metallic member and test. The process of opening die forging is related to applying partial pressure on the metallic member and then the metallic member generates a partial deformation. The die and installation fee are cheaper.
The object of the present disclosure relates to a process for stamping metallic member with forging thickness of side walls for increasing the back extrusion of the side walls, and then can solve the problem caused by the top force. Meanwhile, a gap between a core and a cavity according to the present disclosure need to have a good quality and accuracy. Even the cavity is lack of protecting the side walls of the metallic member during the back extrusion, the fold is not formed on the side walls.
The present disclosure provides a process for stamping metallic member with forging thickness of side walls, the process comprising: a forming step by forging, which forms the metallic member by forging; a step for forging thickness of the side walls, which extrudes the side walls of the metallic member to increase thickness of the metallic member; a specular treatment step with diamond cutter, which generates metallic texture of the side walls of the metallic member; and a finish step for forging thickness of the side walls of the metallic member. Wherein the metallic member, for example, is a sheet stamping component.
In one preferred embodiment, the thickness of the side walls of the metallic member is increased about 30˜40% based on the original thickness after stamping and forging the metallic member, and then surface of the metallic member can be treated by specular machining and C-angle (such as chamfer angle and bevel angle) with specular treatment and anodization treatment to uniform the thickness of the side walls of the metallic member.
Although the process for stamping metallic member with forging thickness of side walls according to present disclosure increases the back extrusion of the side walls, it can solve the problem caused by the top force. A gap between a core and a cavity according to the present disclosure need to have a good quality and accuracy. Even the cavity is lack of protecting the side walls of the metallic member during the back extrusion, the fold is not formed on the side walls.
Computer Numerical Control (CNC) is related to a process which includes input the NC program command into a memory of the digital control system, compiled and calculated by a computer through a displacement control system, and then transmit an information to a driver to drive a motor for cutting components designed for machining. A machine tool by using computer control, is generally called CNC. For example, machining by using the cutter tool, which is a super-precision turning technology for machining a flexible metal, such as aluminum alloy or cooper alloy, by using natural diamond cutter to obtain optical mirror. An optical metal mirror machining by diamond cutter can obtain a higher reflectivity. As super-precision CNC lathes are appeared in recent years, profile machining on an aspherical mirror obtain a better solution. Besides, after cutting the metal surface by the cutters, the surface obtain a high gross effect as a metal texture.
With the development of the high-performance and high-accuracy CNC machine tool and superior-performance diamond cutter, the CNC specular machining technology has a significant breakthrough, that is, specular machining can be used as a skilled application. The principle of the CNC specular machining is related to use a specular diamond cutter with scientific and reasonable cutting parameters in the precision CNC machine for the purpose of a glistened surface result. The material for CNC specular machining can be an acrylics, polymethyl methacrylate, copper alloy, copper, aluminum alloy, aluminum, magnesium alloy, zinc alloy, etc.
Anodization is one of conversion coating technologies. According to the definition of ASTM, conversion coating means generating a film contained with metal component on the surface of the metal by use of chemical or electric chemical treatment, for example, chromate conversion coating treatment for zinc, phosphate conversion coating for steel, and anodization of aluminum alloy . . . etc. The compound or the oxide of the metal which be proceeding by conversion coating treatment is no water-solubility necessarily and not powder, that is, must be a continuous film.
Aluminum alloy is oxidized easily in general. Although the oxidized layer has passivation, the oxidized layer will be peeled after exposing with long time, and thus will be lack of protection. Therefore, the purpose of the anodization relates to use the characteristic which is easily oxidized and control the oxidized layer generation by electric chemical method for preventing the aluminum material further oxidized and advancing the mechanical properties of the surface. Another purpose of the anodization relates to generate various colors by different forming reaction for advancing the beauty of looking.
The principle of the anodization is related to set the metallic member, such as aluminum and aluminum alloy, on the anode and apply a specific voltage and current in order to form a oxidized layer attached on the member surface.
It is to be realized that the optimum dimensional relationships for the shell structure or parts of the disclosure, to include variations in size, materials, shape, form, function and manner of operation, assembly and use, are deemed readily apparent and obvious to one skilled in the art, and all equivalent relationships to those illustrated in the drawings and described in the specification are intended to be encompassed by the present disclosure.
Refer to
Refer to
Refer to
The thickness of the side walls of the metallic member is increased about 30˜40% based on the original thickness after stamping and forging the side walls of the metallic member, and then surface of the metallic member is allowable to treat by specular machining (about 0.2 mm) and C-angle specular treatment. After specular machining, the thickness of the side walls of the metallic member can maintain the thickness and uniform. A surface brushed finish and anodization are also used in the present disclosure, with the metallic member treated by the process of stamping, CNC specular machining and anodization, the metallic member and the CNC working time can be saved and the strength of the sidewall is improved.