FR2459693A1 - Washer cutting machine press with following tool - has floating die using press plates which displace in same direction as tools etc. - Google Patents

Abstract

The machine press punches washers (4) from metal sheet (5), using a "parisian" type following tool with a floating die. Alternating die movement is produced by using upper and lower tables which are displaceable on the axis followed by functional press components. The floating die effects the cutting of plane washers, permits the alignment of sharp washers arises in the same direction and also permits the planing and marking of the washers if desired. A pre-cut may effect part cutting of the washer outline, cutting through some two thirds of the sheet thickness, and using a primary drop punch (1) to push the outline into the die. A secondary inversely acting punch (3) may effect simultaneous removal of the washer core (9), with a counter punch (2) effecting marking and or planing. The plate (5) is then shifted for the cut to be completed by a third drop punch (6).

Description

the devices currently used do not allow a flat outline of the washers as a tool to follow as a Parisian tool ".
This device allows, without simultaneous cutting of the interior and exterior shapes, to obtain the flatness and the final appearance of the parts obtained during cutting into a "Swiss block". This device also makes it possible to mark the pieces during the precut.

It is given by way of nonlimiting example my embodiment
referring to the accompanying drawings.

This device is a cutting tool for a cutting press, it is of the "Parisian tool" type, it has the particularity of being mounted with a floating matrix which makes it possible to orient all the rounded angles and all the sharp angles in the same direction during cutting parts (washers). The floating matrix 7 has an alternating movement sui
before the vertical axis of the tool. This movement / given by the plates
upper and lower of the press on which is mounted this
tool, it is secured between the lower and upper parts
res of the tool thanks to a sliding axis system 8.

tans this tool the first operation aims to pre-cut the
external forms of the parts to be obtained. This precut can be
simultaneously with the complete cutting of interior shapes
pinch 3 either at a different step.

This precut is obtained using the punches 1 which execute
a partial cut of the thickness of the metal to be cut on the
all the external forms to obtain or simply on a
part of these forms.

This precut made by the punch 1 is of little value
almost equal to S / 3 of the thickness of the metal 5. The pre-cut parts remain integral with the strip 5 without the aid of elastic processes
pressure ticks such as springs, hydraulic pressures, tires or magnetic electrons.
pre-cut to plan and mark the pieces with a punch
engraved 2. Part 4 thus prepared is detached from the strip by
cutting punches 6. the waste produced by the punch 1 and the
spare parts when cutting punches 6 are removed from
the tool in a high direction, the others in a low direction, this
which allows very easy sorting of parts and waste.

This tool is designed for the manufacture of flat washers but the
process can be used for other manufacturing requiring a
plane cutting of the parts to be obtained. It can between adapted by the forum
punches and dies for all other manufacturing.

Claims (8)

Claim 1 / Cutting tool of the Parisian tool type to be followed with a floating matrix, characterized by the fact that the floating matrix has an alternating movement produced by the plates according to the operating base of the press, characterized by the fact that this floating matrix is applied in the cutting of flat washers and that it allows the orientation of the sharp angles in the same direction, this tool ensuring Re plus the marking and the leveling of said washers. This marking and this planing are carried out during a precut operation of the external shapes of the parts to be obtained while performing a complete cutting of the interior shapes. This precut is followed by a complete cut of these said external shapes during a following operation. 2 / A cutting tool of the Parisian tool type to be followed with a floating matrix according to claim 1, characterized in that the first cutting operation consists of an action either simultaneous or in several phases of pre-cutting of the external shapes and of the total cutting of the shapes. interiors. 3 / A cutting tool of the Parisian tool type to be followed with a floating matrix according to claim 1 characterized in that the orientation of the sharp angles is obtained by an inverted cutting of the interior and exterior shapes. 4 / Cutting tool of the Parisian tool type to be followed with a floating matrix according to claim 1 and 3 characterized in that this  orientation of the sharp angles makes it possible to obtain the same final appearance as the parts cut by a tool of the "Swiss block" type. 5 / Cutting tool of the Parisian tool type to follow with a floating matrix according to claim 2 characterized in that the pre-cutting of the external shapes is not done in the entire thickness of the metal. 6 / Cutting tool of the Parisian tool type to be followed with a floating die according to, Claims 1 and 5 characterized in that the precut parts remain integral with the strip in which they are cut. 7 / A cutting tool of the Parisian tool type to be followed with a floating matrix according to claims 1 characterized in that the marking operation e; leveling can be carried out either simultaneously with the precut, the whole being carried out in a single operation, or in several phases which allows the execution of the process in the lab. 2pieces other than the washers. 8 / Cutting tool of the Parisian tool type to follow with floating matrix according to claim 1 and 3 characterized by the fact that the reverse action of punches allowing the cuts, ensures an easy sorting of waste on the one hand and parts obtained from somewhere else.