Production process of elliptical head or dish-shaped head

Abstract

The invention provides a production process of an elliptical head or a dish-shaped head. The production process comprises the following steps: (a) preparing a planar plate to be processed according tothe size of the head to be formed; (b) selecting a stamping die with the radius close to that of a gentle arc section at the bottom of the elliptical head or the dish-shaped head, placing the planarplate on the stamping die, and stamping to form a primarily formed plate after the centers are aligned; (c) selecting a spinning die matched with the radius of a sharp turn arc section in the middle of the elliptical head or the dish-shaped head, aligning the center of the forming position of the primarily formed plate with the center of a working turntable of an edge folding machine, starting theedge folding machine, and forming the part above the forming position of the primarily formed plate to form a primarily formed head; and (d) cutting off the part, higher than a product net material,of the top of the primarily formed head to obtain the finished head. The production process of the elliptical head or the dish-shaped head has the advantages of no need of special dies, high operability, high production efficiency, reduction of hardening of the head and low thinning amount.

Description

technical field [0001] The invention relates to a production process of a head, in particular to a production process of an elliptical head and a dished head. Background technique [0002] Such as figure 1 As shown, the shape of the elliptical head is similar to that of the disc head, and its section along the central axis can be regarded as composed of a gentle arc segment 1 at the bottom, a sharp arc segment 2 at the middle, and a straight line segment 3 at the top, among which the sharp The two ends of the circular arc section 2 are smoothly connected to the gentle circular arc section 1 and the straight line section 3, and the radius of the gentle circular arc section 1 is set larger than the radius of the sharp circular arc section 2, thereby forming an ellipse or a dish shape. [0003] There are two traditional methods for preparing elliptical or dished heads. One is mold stamping. Since the cross section of the head is composed of two arcs, it is necessary to form a ...

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Problems solved by technology

[0003] There are two traditional methods for preparing elliptical or dished heads. One is mold stamping. Since the cross section of the head is composed of two arcs, it is necessary to form a gentle arc segment 1 before stamping, and then form a sharp circle. Arc section 2 requires the use of two or more sets of molds. The final forming mold needs to use a special mold for the combination of different radii. This not only greatly increases the number of molds, but also the product size control mainly depends on the mold size control. The operable space is very small; the other is the two-step spinning method, first use the drum press to form the bottom of the head, and then use the folding machine to fold the edge of the head to form, this way the product size is determined by the processing Personnel control, large operating space, but low forming efficiency, severe hardening during head processing, and high thinning

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