Metal tools and implements – making – Blank or process – Die
Patent
1986-08-01
1988-08-02
Parker, Roscoe V.
Metal tools and implements, making
Blank or process
Die
B23H 912
Patent
active
047607629
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to the field of engineering, and more particularly to a method of making a line of die sets.
In making die sets, provisions have been made for reducing labor consumption and the amount of hand fitting.
There is known a method of making a die set line (cf. Textbook "Manufacture of Die Sets, Press Moulds, and Fixtures", by V. M. Vladimirov, Moscow, Vysshaya Shkola Publishers, 1981, pp. 226-230), including blanking, drawing, trimming, piercing, and outward flanging die sets, wherein a line of die sets is made according to the theoretical contour of a blank. The blanking die set is used for blanking operation and the forming die sets, including sets for drawing, trimming, piercing, outward flanging, are used for stamping operations. Compliance with a reference drawing is checked. Should it be impossible to produce an adequate part from the cut-out blank, the working parts of the blanking die set, which include male and female dies, a stripper, and a knock-out, are final finished along their contours. Thereafter, a new blank is cut and a new part is stamped in forming die sets, whereupon said part is checked for compliance with dimensions specified in the drawings involved. The above operations must be repeated until an adequate part is produced. Should it be impossible to final finish the working parts of the blanking die set, new working parts must be made.
Final finishing of the working parts of the blanking die set made according to the theoretical contour of the blank is necessitated by the fact that metal ductility, anisotropy of its properties, and ironing in the process of stamping at each of the bend points are not allowed for in the theoretical calculations of the blank contour.
The aforesaid method features a long manufacturing cycle, considerable labor consumption, and a great amount of hand fitting.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide such a method which makes it possible to reduce labor consumption in making a blanking die set due to a number of technological improvements introduced in the manufacture of its working parts.
The object is attained by a method of making a die set line, according to which the first blanking die set in the line is corrected in compliance with results of stamping the blank produced using the other die sets. A blank is made by electrical discharge machining with the aid of a wire tool electrode, the electrical discharge machining program being connected in accordance with results of stamping the blank using the other die sets. Once the correct blank is produced, tool electrodes are made for electrical discharge machining of the working parts of the first blanking die set, in the line.
The herein-disclosed method of making a line of die sets provides for:
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention is illustrated hereinbelow by the description of examples with reference to the accompanying drawings, wherein:
FIG. 1 represents a sheet blank;
FIG. 2 represents a stack of sheet blanks to be cut in a N/C electrical-discharge machine as per a program made up on the basis of the theoretical contour of the blank;
FIG. 3 is a plan view of the same;
FIG. 4 represents a blank processed with a drawing die set;
FIG. 5 represents a blank processed with a trimming die set;
FIG. 6 represents a blank processed with a piercing die set; and
FIG. 7 represents a finished item processed with an outward flanging die set.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The method of making a line of die sets involves the following operations.
A blanking die set is made tentatively according to a theoretical contour of the blank, its components such as male and female dies, a stripper, and a knock-out being made with a working profile allowance of 5 to 10 mm with respect to the theoretical contour of the blank 1 (FIG. 1).
The other die sets in the line, such as drawing, piercing, trimming, and outward flanging die sets, are made to final size.
Thereafter, as shown in FIGS. 2 and 3, th
REFERENCES:
N. K. Foteev, "Electromachining Processes", Mashinostroenie Publishers, 1980, Moscow, pp. 142-143.
V. M. Vladimirov, "Manufacture of Die Sets, Press Moulds, and Fixtures", Vysshaya Shkola Publishers, Moscow, 1981, pp. 226-230.
Kulikov Viktor V.
Rudnev Ivan E.
Parker Roscoe V.
Volzhskoe Obiedinenie Po Proizvodstvu Legkovykh Avtomobilei
LandOfFree
Method of making die set line does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of making die set line, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making die set line will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-706615