RU1819173C - Process of manufacture of hollow skelp of bottles - Google Patents

Abstract

Usage: refers to the processing of metals by pressure, in particular, to the manufacture of a hollow billet for the body of the can of domestic siphons, aerosol cans and other vessels made with a thickening of the body in the neck for locking elements such as cork. valves on high-performance equipment such as rotary lines x. SUMMARY OF THE INVENTION: First, a piece blank is cut out of a sheet, then the cap is first drawn out, and then thermochemical treatment is carried out. Then, on the automatic rotor line in the first rotor, in the two-matrix die block, the second and third stretching transitions are carried out by one punch through two dies. Further, the preforms are taken from the first rotor and transferred to the second rotor in the strainer block, where the fourth stretching transition is performed with the annular waste ejected. The second and third drawing transitions are made by a cylindrical step punch with a spherical end face. At the third passage, part of the wall at the open end is drowned. The fourth transition is realized by a cylindrical step punch with an annular recess between the steps, forming a cutting edge with a larger step. 10 ill.

Description

The invention relates to the processing of metals by pressure, in particular to the manufacture of a hollow blank for cans, household siphons, housings for household siphons, housings for household siphons, aerosol cans and other vessels made with a thickening of the housing in the neck for locking elements such as corks, valves, faucets, valves on high-performance equipment, for example, rotor lines x.

The aim of the invention is to improve the quality by eliminating crack formation, reducing the removal force of the withdrawal from the punch and increasing the productivity of the stamping process.

Fig. 1 is a diagram of a manufacturing method for transitions of a blank and a can; in FIG. 2 - node J in FIG. 1; in FIG. 3 - barrel of the can after crimping; in FIG. 4 - beginning of the second hood transition; in FIG. 5 - third hood transition; in FIG. 6 - the third transition of the hood (the workpiece is removed and removed00

d

Yu

 with

SL

com from the punch), in FIG. 7 and 8 are the fourth transition of drawing and forming a thickening in the future muzzle (locking) part of the can; in FIG. 9 is a fourth stretching transition at the time of forming a bulge in the annular recess of the punch and the beginning of the separation of the annular waste; in FIG. 10 - eat from the punch of a hollow billet with reverse deformation and remove the annular waste.

The method is carried out as follows.

First, the piece blank is cut from the sheet, then the cap is first drawn out. It is possible to cut and stretch in a combined stamp. Thereafter, a thermochemical treatment is carried out. Annealing is carried out in a continuous screw furnace, etching, phosphating, and saponification in a screw type aggregate. Further operations are carried out in an automatic rotor line. In the first rotor (not shown in the drawing), in the two-matrix die block (Figs. 4, 5, 6), the second and third drawing transitions are made by one punch through two dies. Next, the workpiece is taken from the first rotor and transferred to the second rotor in the stamping unit (Figs. 7, 8, 9, 10), where the fourth transition of the exhaust is performed with the annular waste ejected.

Next, the workpiece is crimped neck, machining, etc.

The second stretching transition (after the thermochemical operation) is carried out without thinning the wall, the third stretching transition is carried out with the thinning of the wall of a part of the workpiece at the open end by the amount of waste separated at the subsequent transition. The inner diameter of the edge part of the preform is larger than the increased edged diameter of the cylindrical working surface of the punch of the fourth stretching transition. Starting from the second transition, the hood is led by a cylindrical stepped punch tapering to a spherical end face. The second transition of the extract is made into the working hole of the matrix with a cylindrical entry section to exclude uneven festooning.

At the fourth transition of the hood, after thinning the walls of the cylindrical part, a thickening is formed in the annular recess of the punch under the cork socket in the neck of the can, while the inner diameter of the edge part of the workpiece remains unchanged, i.e. larger than the larger edged diameter of the cylindrical working surface of the punch to separate the annular waste at the start point along the inside of the side wall with thinning at the open end. The thickening originally collected in the annular recesses of the punch when removed from the punch

the hollow billet is deformed outward, while the diameter of the open part remains unchanged, which eliminates the crack formation of both the edges of the thickened edge and the generatrix of the annular waste.

0

In the case of cracks in the hollows of the festoons at the annular waste (due to tolerances on the thickness of the sheet of material and tool), a sleeve overlapping the height of the cavity of the puller and made with an inner diameter exceeding the outer diameter of the finished semi-finished product is installed to prevent os5 pegs from entering the cavity of the puller . Using the proposed method will improve the quality of manufacture of the can by eliminating crack formation and increase productivity

5 processes, while

by thinning the edge of the workpiece, an increase in the height of the workpiece is achieved;

high part of the workpiece is open, intended for trimming it eliminates influence. stretching the tangential tensile stresses on the edge of the workpiece during stretching, and, consequently, the formation of longitudinal cracks;

the absence of a smaller diameter for cutting:

5 with the common edge of the punch - the U-shaped collar itself (excludes the cutting of annular waste and the formation of cracks in the separation zone (bites), the destruction of the waste into elements and eliminates the formation of

Claims (1)

0. Of hair when removing the annular waste from the punch, and also reduce the force of removal of the waste. The claims A method of manufacturing a hollow billet 5 cans from a sheet blank with a punch into a matrix, comprising the first and second drawing transitions without thinning the wall, followed by drawing transitions with thinning the wall, thermochemical processing between the transitions, forming a thickening from the open end side and separating the annular waste, characterized in that that the second and third transitions of the hood are made by a cylindrical step pu5 by tapering in the direction of its spherical end face, at the third transition of the hood, partially thinned from the side of the open end of the workpiece by the amount of annular waste, the fourth hood transition is made cylindrical spherical step punch the edge, and the separation of the annular waste by a protractor and having an annular recess, is plated along the inner line of contact with the lower step smoothly and the walls with its thinned part on the side forming an open end cutting with a higher step. 5 edge, and the separation of the annular waste pro Shchig. 1 77 /, FIG. 4 figure 1 h G FZZ ЈL Figure 5 FIG. 6 FIG. 7 Fi g. 9