AN IMPROVED METHOD FOR DEMAGNETISING STEEL WIRES DURING COLD FORGING AND THE PRODUCT THEREOF.
FIELD OF INVENTION
The present invention discloses an improved method for demagnetizing the steel wires / rods before the forging or head formation. More particularly the invention discloses a method for quick annealing of steel wires before forging or head formation.
BACKGROUND OF INVENTION
During the process of cold forging of the steel wire, it has been seen that the forging of the steel wire or rod magnetises the product which is extremely undesirable, since the dimensions of the product gets deteriorated and thus gets rejected. Due to the magnetizing effect the tools used in the process gets damaged and in the process the product also gets affected dimensionally resulting is huge loss to the industry. The low nickel grade steels having 0.5 to 3% nickel in steel composition are greatly affected in the process of cold forging.
SUMMARY OF THE INVENTION
Such as herein described an improved
method for demagnetizing the steel wires before head formation / forging process to prevent the dimensional defects of the product during the forging act.
It is therefore a task of the invention to create a method to the processing of steel headed screws, bolt, rivet and the like with law costs, which are practically I concerning their technical properties in manufacturing the said product. This task is solved according to the invention with a method by quick annealing the steel rod or wire and cold forging the said rod or wire for the forming of head.

Another object of the present invention is to provide a method for quick and reliable annealing.
Yet another aspect of the present invention is to provide an arrangement of demagnetizing whose spares are easily available and easily arranged / assembled.
Another object of the present invention is to devise a method with minimal accessories.
Another exemplary embodiment of the present invention is to provide an arrangement, which is free from any maintenance requirements.
Another object of the present invention is to provide an arrangement which can last long and safe and can be used anywhere.
These together with other objects of the invention, along with the various features of novelty, which characterize the invention, are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and the specific objects attained by its uses, reference should be made to the accompanying drawing and descriptive matter in which there are illustrated preferred embodiments of the invention.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
FIG. 1 is a diagram showing the method according to the present invention.
DETAILED DESCRIPTION
The invention relates to an improved method for demagnetizing steel wires / rods during the continuous process for the production of screw-bolts and the like by cold deformation. During the process of the production of steel screw-bolts, the

heads are made by hammering / forging by means of forming hammers, acting transversely in relation to the axis of the bolt using a forming die.
Due to the process of repeated hammering for the formation of head and the presence of Nickel in the composition of the steel or as an impurity, the screw / bolt get magnetized and thus shaping and the tooling of the bolts is difficult since the tools and the shapers gets damaged. The head formation for the screw / bolt is also not proper as per the desired dimensions, leads to the rejection of the product.
As discussed above there is disclosed a method for quick annealing of steel wires / rods before forging of head in the steel wires. The steel wires / rods are passed through a round heater or heating element before the forging is done. This quick annealing demagnetizes the steel wire / rod before the forging and demagnetized property is maintained. The heating of the steel rod / wires can also be made by a normal Arc welding set.
As per an exemplary embodiment, the wire / rod is heated to a temperature of range 200 to 600° C. A bolt produced in this manner is very inexpensive while being strong and accurate. The hammering takes place in each case with forming elements after passing it from inside the heating element.
Although the foregoing description of the present invention has been shown and described with reference to particular embodiments and applications thereof, it has been presented for purposes of illustration and description and is not intended to be exhaustive or to limit the invention to the particular embodiments and applications disclosed. It will be apparent to those having ordinary skill in the art that a number of changes, modifications, variations, or alterations to the invention as described herein may be made, none of which depart from the spirit or scope of the present invention. The particular embodiments and applications were chosen and described to provide the best illustration of the principles of the invention and its practical application to thereby enable one of ordinary skill in the

art to utilize the invention in various embodiments and with various modifications as are suited to the particular use contemplated. All such changes, modifications, variations, and alterations should therefore be seen as being within the scope of the present invention as determined by the appended claims when interpreted in accordance with the breadth to which they are fairly, legally, and equitably entitled.

I Claim -
1 . An improved method for demagnetizing steel wires during cold forging or
head formation comprising the steps of.-
quick annealing the steel rod or wire; and
cold forging the said rod or wire for the forming of head.
2. The method for demagnetising steel wires during cold forging as claimed
in claim 1, wherein the step of quick annealing the steel rod or wire is done by
heating the same by passing through a round heater.
3. The method for demagnetising steel wires during cold forging as claimed
in claim 1 , wherein the step of quick annealing the steel rod or wire is done by
heating the same by normal arc welding set.
4. A demagnetized head formed steel wire or rod manufactured using the
method as claimed in any of the preceding claims.
5. An improved method for demagnetising steel wires during cold forging or
head formation, substantially as herein described with particular reference to
accompanying drawing.