What is parting line in forging?
Parting line is the plane where the two die halves meet along the forging. The selection and location of parting line affect many parameters like load and energy requirement, grain flow, amount of draft, die sinking, trimming operation, cost of the die, defect formation, die wear and die life.
What is the physical significance of parting line design approach for forging dies?
ADVERTISEMENTS: (i) The parting line should be pass through the maximum periphery of the forging. Because, it is easier to spread the metal laterally than to force it to fill deep, die impressions.
What is flash and gutter in forging?
A small gap between the dies called flash gutter is provided so that the excess metal can flow into the gutter and form a flash. In hot forging, the flash cools faster as a result of it being smaller in size. This enhances the resistance of the flash material to deformation resistance.
What is draft angle in forging?
The angle of taper, expressed in degrees (usually 5° to 7°), given to the sides of the forging and the side walls of the die impression.
What is meant by parting line?
: the line or plane along which sections of a foundry mold, die, or pattern separate.
What is the purpose of a parting line?
A parting line, in industrial casting of molds, is the border line in which draft angles change direction.
How do you choose a parting line in forging?
The parting line should be indicated on the forging drawing. It is preferable that the parting line lie in one plane perpendicular to the axis of the die motion. It can be located such that one die half will be completely flat, and the line will surround the largest projected area of the piece.
What is parting line in Mould?
A parting line is an inevitable part of injection molded products. It is the line of separation between where two halves of a mold meet. It manifests itself on injection molded parts as a line that runs the entire perimeter of the part. In most parts, it is just a line that runs straight down the middle.
What is Fullering in forging?
The fuller is a forging tool, used to spread the metal. “Fullering,” more generally, refers to any forging process creating a sharp transition in cross-dimensional area; with care, some types of fullering can be achieved using only hammer and the edge of the anvil (which acts as the fuller).
What is blocking in forging?
The purpose of blocking (reducing the ingot cross section) in open-die press forging is to maximize the internal deformation for better structural homogeneity and soundness of material in the core of the ingot.
What is flash in forging?
Flash — Metal in excess of that required to fill completely the blocking or finishing forging impression of a set of dies. Flash extends out from the body of the forging as a thin plate at the line where the dies meet and is subsequently removed by trimming.
What is parting line discuss its importance?
Often times it is useful to have most of the geometry in the ejector half; as this prevents the casting from sticking in the cover half. The parting line is created where the two halves of the die meet. Positioning of the parting line to allow metal to flow more smoothly will improve die life and casting quality.
Why is the parting line important in forging?
Proper placement of the parting line ensures that the principal grain flow direction within the forging will be parallel to the principal direction of service loading. The article reviews the mutual dependence of parting line and forging process.
What should the parting line of a metal be?
Parting line should lie in different planes but be co-planer. Parting line should be so located that metal flows parallel to the parting line. iii. Tapers assisting in forging and ejection of part should be provided on part and dies also. iv.
How does the parting line affect grain flow?
Regardless of whether draft is applied or natural, the forging will have its maximum spread or girth at the parting line. Proper placement of the parting line ensures that the principal grain flow direction within the forging will be parallel to the principal direction of service loading.
What are the basic principles of forging design?
Following are some recommended forging design principles: 1. Parting Line 2. Draft 3. Ribs 4. Webs 5. Corner Radii 6. Fillet Radii 7. Pockets and Recesses 8. Punch Out Holes. Principle # 1. Parting Line: The plane of separation between the upper and lower halves of a closed die set is called the parting line.