U.S. patent application number 12/185108 was filed with the patent office on 2009-10-15 for bending die.
This patent application is currently assigned to HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.. Invention is credited to FU-SHUN HUANG, KUO-JUNG HUANG, YI-HUA LIU, JIAN LUO, SHU-WEI ZHOU.
Application Number | 20090255313 12/185108 |
Document ID | / |
Family ID | 41162864 |
Filed Date | 2009-10-15 |
United States Patent
Application |
20090255313 |
Kind Code |
A1 |
HUANG; KUO-JUNG ; et
al. |
October 15, 2009 |
BENDING DIE
Abstract
A bending die includes an upper die base fixing a punch, a lower
die base, a stripping block, a bending block and a gasket assembly.
The stripping block is on the lower die base and under the punch
and can elastically move relative to the lower die base. The
bending block includes a first sidewall and a second sidewall,
wherein the first sidewall is contiguous with the stripping block
and the second sidewall is connected to the lower die base via
screws. The gasket assembly between the second sidewall and the
lower die base provides adjustment of clearance of the bending
die.
Inventors: |
HUANG; KUO-JUNG; (Tu-Cheng,
TW) ; LIU; YI-HUA; (Shenzhen City, CN) ;
HUANG; FU-SHUN; (Tu-Cheng, TW) ; ZHOU; SHU-WEI;
(Shenzhen City, CN) ; LUO; JIAN; (Shenzhen City,
CN) |
Correspondence
Address: |
PCE INDUSTRY, INC.;ATT. Steven Reiss
288 SOUTH MAYO AVENUE
CITY OF INDUSTRY
CA
91789
US
|
Assignee: |
HONG FU JIN PRECISION INDUSTRY
(ShenZhen) CO., LTD.
Shenzhen City
CN
HON HAI PRECISION INDUSTRY CO., LTD.
Tu-Cheng
TW
|
Family ID: |
41162864 |
Appl. No.: |
12/185108 |
Filed: |
August 3, 2008 |
Current U.S.
Class: |
72/315 |
Current CPC
Class: |
B21D 5/04 20130101 |
Class at
Publication: |
72/315 |
International
Class: |
B21D 11/00 20060101
B21D011/00 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 9, 2008 |
CN |
200810300927.1 |
Claims
1. A bending die, comprising: an upper die base, configured with a
punch; a lower die base; a stripping block, corresponding to the
punch and being elastically connected to the lower die base, a bay
being defined between the lower die base and the stripping; a
bending block, received in the bay and fixed on the lower die base,
and maintaining a distance relative to the stripping block; and a
gasket assembly, comprising at least one gasket received between
the bending block and the lower die base to adjust the distance
between the bending block and the stripping block.
2. The bending die as claimed in claim 1, wherein the bending block
defines at least one screw hole, the lower die base defines at
least one through hole corresponding with the at least one screw
hole, wherein at least one screw penetrates the at least one
through hole and is received in the at least one screw hole.
3. The bending die as claimed in claim 2, wherein the at least one
gasket defines at least one opening corresponding with the at least
one screw hole.
4. The bending die as claimed in claim 2, wherein the at least one
screw hole is a through hole.
5. The bending die as claimed in claim 1, wherein the bending block
comprises four bending edges, one of which defines a curved groove
receiving a column therein.
6. The bending die as claimed in claim 5, wherein other three
bending edges have different fillets.
7. The bending die as claimed in claim 1, wherein the distance is
adjusted by addition or removal of one or more gaskets.
8. A bending die, comprising: an upper die base, configured with a
punch; a lower die base; a stripping block, corresponding to the
punch and being elastically connected to the lower die base; a
bending block, fixed on the lower die base and comprising a first
sidewall close to the stripping block and a second sidewall close
to the lower die base; and a gasket assembly, located between the
second sidewall and the lower die base and comprising at least one
gasket, wherein clearance of the bending die is adjustable by
addition or removal of the at least one gasket.
9. The bending die as claimed in claim 8, wherein the bending block
defines at least one screw hole, the lower die base defines at
least one through hole corresponding with the at least one screw
hole, and wherein at least one screw penetrates the at least one
through hole and is received the at least one screw hole.
10. The bending die as claimed in claim 9, wherein the at least one
gasket defines at least one opening corresponding with the at least
one screw hole.
11. The bending die as claimed in claim 9, wherein the at least one
screw hole is a through hole.
12. The bending die as claimed in claim 8, wherein the bending
block comprises four bending edges, one of which defines a curved
groove receiving a column therein.
13. The bending die as claimed in claim 12, wherein other three
bending edges have different fillets.
Description
BACKGROUND
[0001] 1. Field of the Invention
[0002] The present invention relates to dies and, specifically, to
a bending die.
[0003] 2. Description of related art
[0004] One of the most significant factors that affect the
precision of workpieces during bending process is die clearance
between a punch and a die base of a bending die. The precision of
the workpieces is increasingly reduced as the die clearance becomes
larger. However, if the die clearance is too small, the workpieces
cannot easily be removed from the bending die and are apt to be
scratched. During production, when bending different workpieces, an
operator must adjust the die clearance of the bending die.
[0005] Referring to FIG. 6, a perspective view of a conventional
bending die, the bending die includes an upper die 10 and a lower
die 20. The upper die 10 includes a fixing portion 11, an upper die
base 12 having a punch 14 and a gasket 13 located between the
fixing plate 11 and the upper die base 12. The lower die 20
includes a lower die base 22, a stripping block 23 elastically
connected to the lower die base 22, and a bending block 24 fixed on
the lower die base 22, wherein the bending block 24 is contiguous
with the stripping block 23. Clearance of the bending die is
adjusted by modifying different gaskets 13 with various standard
widths. When the die clearance needs to be adjusted, the upper die
base 12 is first removed from the upper die 10, gasket 13 is
modified to a proper width, and the upper die base 12 and the
gasket 13 are fixed to a proper width on the fixing plate 11. After
changing the clearance, the bending die must again be readjusted,
an inconvenient and inefficient requirement.
[0006] Therefore, a heretofore unaddressed need exists in the
industry to address the described limitations.
SUMMARY
[0007] According to an exemplary embodiment of the present
invention, a bending die comprises an upper die base fixing a
punch, a lower die base, a stripping block, a bending block and a
gasket assembly. The stripping block is on the lower die base,
opposite the punch and elastically connected to the lower die base,
with a bay between the lower die base and the stripping. The
bending block is received in the bay and fixed to the lower die
base. The gasket assembly is received in the bay between the
bending block and the lower die base.
[0008] Other advantages and novel features will become more
apparent from the following detailed description when taken in
conjunction with the accompanying drawings, in which:
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] FIG. 1 is a perspective view of a bending die in accordance
with an exemplary embodiment;
[0010] FIG. 2 is an exploded perspective view of a lower die of the
bending die of FIG. 1;
[0011] FIG. 3 is a perspective view of a gasket assembly of the
bending die of FIG. 1;
[0012] FIG. 4 is a perspective view of a bending block of the
bending die of FIG. 1;
[0013] FIG. 5 is a plane view of a second sidewall of the bending
block of the bending die of FIG. 1; and
[0014] FIG. 6 is a perspective view of a conventional bending
die.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0015] Referring to FIG. 1 and FIG. 2, a bending die comprises an
upper die base 50 and a lower die base 60. The upper die base 50
and the lower die base 60 are both installed in a bending machine
(not shown), opposite to each other.
[0016] The upper die base 50 is configured with a punch 52 via a
plurality of screws 522. The lower die base 60 defines a groove 62
corresponding to the punch 52. The groove 62 receives a stripping
block 64 therein which is elastically connected to the lower die
base 60 via a spring 65 between a bottom 642 of the stripping block
64 and the lower die base 60. The lower die base 60 further
includes a fixing portion 67, wherein a bay between the fixing
portion 67 and the stripping block 64 receives a bending block 66
and a gasket assembly 68. The bending block 66 comprises a first
sidewall 662 and a second sidewall 664. The first sidewall 662 is
close to the stripping block 64 and maintains a distance from the
stripping block 64, manifested as the die clearance of the bending
die. The second sidewall 664 is close to the fixing portion 67. The
gasket assembly 68 comprises at least one gasket between the second
sidewall 664 and the fixing portion 67 to adjust the die
clearance.
[0017] In this embodiment, the second sidewall 664 defines at least
one screw hole 6642 arranged along a central line on a horizontal
axis thereof. The gasket assembly 68 defines at least one opening
682 (referring to FIG. 3). The fixing portion 67 defines at least
one through hole 672. The screw hole 6642, the opening 682 and the
through hole 672 communicate with each other. At least one screw
674 penetrates the through hole 672 and the opening 682 and is
received the screw hole 6642 to screw the bending block 66, the
gasket assembly 68 and the fixing portion 67 together. Preferably,
each screw hole 6642 is a through hole.
[0018] The gasket assembly 68 comprises at least one gasket of a
fixed width. The die clearance of the bending die is adjustable by
addition or removal of one or more gaskets. When the die clearance
of the bending die is to be adjusted, the screw 674 is withdrawn
and removed, one or more gaskets are added or removed as necessary
to change the width of the gasket assembly 68, and the screw 674 is
tightened. As a result, only the width of the gasket assembly 68
needs to be adjusted by addition or removal of gaskets, with no
requirement for removal or final readjustment of the bending die,
convenience and efficiency are enhanced considerably.
[0019] Referring to FIGS. 4 and 5, in this embodiment, the bending
block 66 includes four bending edges, one of which defines a curved
groove 666 receiving a column 6662 therein, while the other three
bending edges 667, 668, 669 have different fillers R1, R2, R3,
respectively. When workpieces having different surface precision
requirements are to be bent, a specific bending edge can be
employed for each workpiece by turning the bending block 66. Thus,
utilization of the bending block 66 is improved.
[0020] During bending, when the curved groove 666 matching the
column 6662 is used as the bending edge, the surface of the
workpiece is no longer susceptible to scratching. The workpiece is
positioned on the bending block 66, the upper die base 50 moves
down, the workpiece is bent by the pressure of the punch 52, and
the stripping block 64 moves down together with the workpiece. In
the bending process, the workpiece brings a shear force to bear on
the column 6662 which then rotates in the curved groove 666
accordingly. Under this condition, no friction occurs between the
workpiece and the column 6662, and the surface of the workpiece is
no longer susceptible to scratching. After bending the workpiece,
the upper die base 50 and the punch 52 moves up, the stripping
block 64 moves up due to the elasticity of the spring 65, thereby
removing the workpiece from the lower die base 60.
[0021] While exemplary embodiments have been described above, it
should be understood that they have been presented by way of
example only and not by way of limitation. Thus, the breadth and
scope of the present invention should not be limited by the
above-described exemplary embodiments, but should be defined only
in accordance with the following claims and their equivalents.
* * * * *