Die block assembly

Details Die block assembly Die block assembly

2000-11-21

2002-11-26

Larson, Lowell A. (Department: 3725)

Metal deforming

By use of closed-die and coacting work-forcer

With stripping or ejecting from tool

C072S452900

Reexamination Certificate

active

06484549

ABSTRACT:

BACKGROUND
1. Field of the Invention
The present invention relates to a die block assembly, and particularly to a die block assembly having a sliding block.
2. Related Art
A sliding block is one of the most important parts used in the die industry. A conventional punch of a die can only move vertically, not horizontally. To enable dies to be fully adjustable, a variety of movable sliding blocks have been developed. A typical sliding block can be moved horizontally and vertically according to a pair of slanted rails formed on its sides. For convenient operation, the range of movement of the sliding block needs to be limited.
FIG. 6
shows a conventional die block assembly. A protrusion
32
is formed on a sliding block
30
, for engaging with a groove
36
defined in a die plate
34
. Upward movement of the sliding block
30
is limited when the protrusion
32
abuts a top face
38
of a groove
36
of the die plate
34
.
FIG. 7
shows another conventional die block assembly. A cutout
42
isdefined in an upper portion of a rear wall of a sliding block
40
, and a stopper tab
48
is fixed on the die plate
44
by a screw
46
. Upward movement of the sliding block
40
is limited when the stopper plate
48
abuts a bottom face of the cutout
42
of the sliding block
40
.
However, manufacture and assembly of the above-mentioned die block assemblies is unduly complicated. Furthermore, components such as the protrusion
32
and the stopper tab
48
are prone to wear out after repeated use.
A die block assembly which overcomes the above problems is strongly desired.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide a die block assembly which is easily manufactured and assembled.
Another object of the present invention is to provide a die block assembly which is durable and reliable.
To achieve the above-mentioned objects, a die block assembly of the present invention comprises a sliding block and a die plate. The sliding block has a base from which a pair of opposite slanted rails extends. A protrusion with a vertical outer wall extends from one end of the base, between the rails. The die plate has an opening for movably receiving the sliding block therein. A pair of slanted guiding grooves is defined in the plate on respective opposite sides of the opening, for slidably receiving the rails of the sliding block therein. A recess bounded by a vertical inner wall is defined in the plate, for movably receiving the protrusion of the block therein. Upon assembly, in a first position, a clearance exists between the outer wall of the block and the inner wall of the recess. In a second position, the outer wall of the block abuts the inner wall of the recess. Thus movement of the block is limited to a predetermined range.
Other objects, advantages and novel features of the present invention will be apparent from the following detailed description of preferred embodiments of the present invention with reference to the attached drawings, in which:


REFERENCES:
patent: 1977163 (1934-10-01), Wilcox
patent: 2357204 (1944-08-01), Joyner
patent: 3693399 (1972-09-01), Chirco
patent: 6189361 (2001-02-01), Seki et al.

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