aluminum extrusions

We are the ultimate online resource for many different metal working jobs. We have the most knowledgeable employees and the best equipment available so we can get the job done right. - Click here

After the head is formed, the end of the fastener shank opposite the fastener head is spun in a chamfer tool. This removes a small amount of metal aluminum from the end of the fastener shank creating a 30-45 degree chamfer angle on the end of the fastener shank. This chamfer acts as a thread relief when mating with internally threaded products. The fastener is then moved to a thread roller where the threads are formed into the extrusions fastener shank, ending the cold forming process. Strength and cost are two main considerations when choosing between cold forming and machining. When a part is cold formed the grain flow lines are neither cut nor broken but follow the contour of the upset. This process increases the tensile strength of the part. Cold formed parts as compared to machined parts are stronger and tougher both statically and in fatigue, therefore producing a higher quality end product.

Cold forming provides remarkable flexibility making it possible to manufacture just about any geometrical shape. As shown in the picture, material is fed from a coil of wire into and through aluminum the wire rollers of the cold forming machine, where the wire is precisely cut by the wire shear and transferred to the first of several die cavities where it is struck with a punch extrusions or hammer (this is called ''a blow''). The first blow begins to form the shape of the fastener head while the second blow finishes the form/shape desired. The complexity of the shape or design desired determines the number of blows required to achieve that shape or design. self-sealing fasteners add another level of complexity by forming a precisely calculated groove aluminum in the undersurface of the fastener head at the same time that the fastener head is formed. The fastener is transferred to as many dies as necessary to achieve the desired shape with little or no scrap.

A consequence of this is that it is essential that the cold forming load must be below the tensile strength of the material extrusions but above the yield strength of the material. These mechanical properties of the work-piece are directly influenced by its metallurgical structure aluminum of the wire and thus any pre-treatment it has undergone. Cold Forming Techniques Cold forming can be undertaken by a number of different techniques or any combination of them. Upsetting, Reverse Extrusion, Forward Extrusion, Piercing and Trimming. Upsetting In upsetting the billet is sheared then placed between a punch and a die and a vertical load applied. extrusions During this stage the material flow is generally at 90degrees to the direction aluminum in which the load is applied. Reverse or Backward Extrusion is the most common method of producing tubular / hollow components. During reverse extrusion the work-piece is contained within a die while an extrusion punch/pin extrusions is forced into it in a vertical direction. This causes the material to flow parallel to the pin but in the opposite direction to the direction of travel of the pin.

We are the ultimate online resource for many different metal working jobs. We have the most knowledgeable employees and the best equipment available so we can get the job done right.