U.S. patent application number 13/916912 was filed with the patent office on 2014-07-03 for trimming die and punch thereof.
The applicant listed for this patent is National Kaohsiung First University of Science and Technology. Invention is credited to Chun-Chih KUO, Bor-Tsuen LIN.
Application Number | 20140182437 13/916912 |
Document ID | / |
Family ID | 51015668 |
Filed Date | 2014-07-03 |
United States Patent
Application |
20140182437 |
Kind Code |
A1 |
LIN; Bor-Tsuen ; et
al. |
July 3, 2014 |
TRIMMING DIE AND PUNCH THEREOF
Abstract
A trimming die includes a first die base assembly, a second die
base assembly, and a trimming punch. The first die base assembly
includes a fixing portion; the second die base assembly is
positioned opposite the first die base assembly; the second die
base assembly includes a die cavity portion; the die cavity portion
has a die cavity and a die cavity inner wall; the die cavity inner
wall has a plurality of first slant grooves; the punch has a fixing
end portion and a trimming end portion positioned opposite the
fixing end portion; the fixing end portion is disposed at the
fixing portion; the trimming end portion is positioned
corresponding to the die cavity; a peripheral surface of the
trimming end portion includes a plurality of second slant grooves.
A trimming punch is also provided.
Inventors: |
LIN; Bor-Tsuen; (Kaohsiung
City, TW) ; KUO; Chun-Chih; (Kaohsiung City,
TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
National Kaohsiung First University of Science and
Technology |
Kaohsiung City |
|
TW |
|
|
Family ID: |
51015668 |
Appl. No.: |
13/916912 |
Filed: |
June 13, 2013 |
Current U.S.
Class: |
83/451 ;
83/690 |
Current CPC
Class: |
Y10T 83/748 20150401;
B21D 28/16 20130101; Y10T 83/9437 20150401; B21D 28/14 20130101;
B21D 28/34 20130101 |
Class at
Publication: |
83/451 ;
83/690 |
International
Class: |
B21D 28/14 20060101
B21D028/14 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 28, 2012 |
TW |
101150945 |
Claims
1. A trimming die, comprising: a first die base assembly,
comprising a fixing portion; a second die base assembly, positioned
opposite the first die base assembly, wherein the second die base
assembly comprises a die cavity portion; the die cavity portion has
a die cavity and a die cavity inner wall; the die cavity inner wall
has a plurality of first slant grooves; and a trimming punch,
having a fixing end portion and a trimming end portion positioned
opposite the fixing end portion, wherein the fixing end portion is
disposed at the fixing portion; the trimming end portion is
positioned corresponding to the die cavity; and a peripheral
surface of the trimming end portion comprises a plurality of second
slant grooves.
2. The trimming die according to claim 1, wherein the first die
base assembly further comprises a bolt element and a blank holder
positioned corresponding to the die cavity portion; an end of the
bolt element is disposed at the fixing portion, and another end of
the bolt element is disposed at the blank holder.
3. The trimming die according to claim 2, wherein the first die
base assembly and the second die base assembly further comprise a
guide pillar therebetween; the first die base assembly further
comprises a guide pillar lining corresponding to the guide
pillar.
4. The trimming die according to claim 2, wherein the fixing
portion further comprises a punch back plate, a punch fixing plate,
and a fixing element that joins the punch back plate and the punch
fixing plate; the fixing end portion of the trimming punch leans
against the punch back plate and is positioned at the punch fixing
plate.
5. The trimming die according to claim 2, wherein the die cavity
portion is formed of a die block and a die set.
6. The trimming die according to claim 1, wherein the first slant
grooves are arranged at intervals.
7. The trimming die according to claim 1, wherein the first slant
grooves are in the shape of a column-shaped recess, a V-shaped
recess or an arc-shaped recess.
8. The trimming die according to claim 1, wherein the second slant
grooves are arranged at intervals.
9. The trimming die according to claim 1, wherein the second slant
grooves have the same length.
10. The trimming die according to claim 1, wherein the second slant
grooves are in the shape of a column-shaped recess, a V-shaped
recess or an arc-shaped recess.
11. A trimming punch, comprising a trimming end portion, wherein a
peripheral surface of the trimming end portion comprises a
plurality of slant grooves.
12. The trimming punch according to claim 11, wherein the slant
grooves are arranged at intervals.
13. The trimming punch according to claim 11, wherein the slant
grooves have the same length.
14. The trimming punch according to claim 11, wherein the slant
grooves are in the shape of a column-shaped recess, a V-shaped
recess or an arc-shaped recess.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims the benefit of Taiwan Patent
Application No. 101150945, filed on Dec. 28, 2012, which is hereby
incorporated by reference for all purposes as if fully set forth
herein.
TECHNICAL FIELD
[0002] The disclosure relates to a die and a punch thereof, and
particularly to a trimming die and a trimming punch thereof.
BACKGROUND
[0003] The recent decade witnesses a rapid development of the
electronics industry, along with which the sales volume of consumer
electronics such as cell phones and notebook computers rises
significantly. In recent years, these products are developed
following the trend of small volume, light weight, desirable
strength, and easy heat dissipation, so the components thereof also
need to be metalized and refined. Producing components using
semiconductors or non-conventional process has the disadvantages of
high equipment cost, restrictions on materials applied in the
process, a small depth-to-width ratio, and difficulty in producing
three-dimensional components.
[0004] The stamping process is one of the key technologies for mass
production of metal components in the conventional manufacturing
industry. Trimming, drawing and bending dies are widely applied
throughout the entire stamping process for various purposes. The
stamping process has the advantages of high production efficiency,
material conservation, high precision, good mechanical properties
of finished products, unrestricted material application, and
simplified component design, and complies with the current
environmental concept requirement of green industry. Hence, the
application of stamping metal in a micro-component, which is
referred to as micro-stamping, is attracting more and more
attentions.
[0005] Referring to FIG. 1A and FIG. 1B, FIG. 1A is a local
schematic view of a conventional trimming die before a trimming
punch thereof performs a trimming operation on a blank; FIG. 1B is
a local schematic view of a conventional trimming die in FIG. 1A
when a trimming punch thereof is performing a trimming operation on
a blank.
[0006] As shown in FIG. 1A and FIG. 1B, the trimming die 5 includes
a first die base assembly (for example, an upper die base assembly)
and a second die base assembly (for example, a lower die base
assembly) positioned corresponding to the first die. A trimming
punch 50 and a blank holder 51 are disposed on the first die base
assembly; the second die base assembly includes a die block 52, and
the die block has a die cavity 520.
[0007] When an operator wants to perform a trimming operation on a
blank 53, the blank holder 51 and the die block 52 of the trimming
die may be used to fix the blank 53 at a processing position, and
then a downward trimming force F of the trimming punch 50 is used
to accomplish the trimming operation on the blank 53 (for example,
forming a round hole at a central part of the blank 53, or shearing
a part of a side edge of the blank 53).
[0008] However, an external peripheral surface of the trimming
punch 50 of the conventional trimming die 5 or an inner wall of the
die cavity 520 of the die block 52 of the second die base assembly
does not have a special micro-structural design, so the trimming
processing quality of the blank 53 is not as good as expected.
SUMMARY
[0009] The disclosure provides a trimming die capable of improving
trimming quality of a blank, and a trimming punch thereof.
[0010] Accordingly, the disclosure provides a trimming die,
comprising a first die base assembly, a second die base assembly
and a trimming punch, wherein the first die base assembly comprises
a fixing portion; the second die base assembly is positioned
opposite the first die base assembly; the second die base assembly
comprises a die cavity portion; the die cavity portion has a die
cavity and a die cavity inner wall; the die cavity inner wall has a
plurality of first slant grooves; the trimming punch has a fixing
end portion and a trimming end portion positioned opposite the
fixing end portion; the fixing end portion is disposed at the
fixing portion, the trimming end. portion is positioned
corresponding to die cavity, and a peripheral surface of the
trimming end portion comprises a plurality of second slant
grooves.
[0011] In the trimming die according to the embodiment of the
disclosure, the first die base assembly further comprises a bolt
element and a blank holder positioned corresponding to the die
cavity portion, wherein an end of the bolt element is disposed at
the fixing portion, and another end of the bolt element is disposed
at the blank holder; the first die base assembly and the second die
base assembly further comprise a guide pillar therebetween; the
first die base assembly further comprises a guide pillar lining
corresponding to the guide pillar; the fixing portion further
comprises a punch back plate, a punch fixing plate, and a fixing
element that joins the punch back plate and the punch fixing plate;
the fixing end portion of the trimming punch leans against the
punch back plate and is positioned at the punch fixing plate; the
die cavity portion is formed of a die block and a die set.
[0012] In the trimming die according to the embodiment of the
disclosure, the first slant grooves are arranged at intervals.
[0013] In the trimming die according to the embodiment of the
disclosure, the first slant grooves are in the shape of a
column-shaped recess, a V-shaped recess or an arc-shaped
recess.
[0014] In the trimming die according to the embodiment of the
disclosure, the second slant grooves are arranged at intervals.
[0015] In the trimming die according to the embodiment of the
disclosure, the second slant grooves have the same length.
[0016] In the trimming die according to the embodiment of the
disclosure, the second slant grooves are in the shape of a
column-shaped recess, a V-shaped recess or an arc-shaped
recess.
[0017] The disclosure further provides a trimming punch, comprising
a trimming end portion, wherein a peripheral surface of the
trimming end portion comprises a plurality of slant grooves.
[0018] In the trimming punch according to the embodiment of the
disclosure, the slant grooves are arranged at intervals.
[0019] In the trimming punch according to the embodiment of the
disclosure, the slant grooves have the same length.
[0020] In the trimming punch according to the embodiment of the
disclosure, the slant grooves are in the shape of a column-shaped
recess, a V-shaped recess or an arc-shaped recess.
[0021] The disclosure is characterized in that the second slant
grooves of the trimming punch can reduce the trimming force of the
punch on the blank during the trimming operation, thereby improving
the trimming quality of the blank.
BRIEF DESCRIPTION OF DRAWINGS
[0022] FIG. 1A is a local schematic view of a trimming die before a
trimming punch thereof performs a trimming operation on a
blank;
[0023] FIG. 1B is a local schematic view of a trimming die in FIG.
1A when a trimming punch thereof is performing a trimming operation
on a blank;
[0024] FIG. 2A is a schematic view of a trimming die before a
trimming punch thereof performs a trimming operation on a blank
according to an embodiment of the disclosure;
[0025] FIG. 2B is a local schematic view of a trimming die in FIG.
2A when a trimming punch thereof is performing a trimming operation
on a blank;
[0026] FIG. 2C is a schematic view of a trimming die in FIG. 2A
after a trimming punch thereof performs a trimming operation on a
blank; and
[0027] FIG. 3 is a schematic view of a trimming die in which
grooves of a trimming punch thereof and grooves of a die cavity
inner wall are cross slant grooves according to another embodiment
of the disclosure.
DETAILED DESCRIPTION
[0028] To make the objectives, features, and characteristics of the
disclosure more comprehensible, related embodiments of the
disclosure are described in detail below with reference to the
accompanying drawings.
[0029] Referring to FIG. 2A, FIG. 2A is a schematic view of a
trimming die before a trimming punch thereof performs a trimming
operation on a blank according to an embodiment of the disclosure.
An open-die state of the trimming die 1 is shown in FIG. 2A. The
trimming die 1 is used for performing a trimming operation on a
bank 20 and includes a first die base assembly 11, a second die
base assembly 12, and a trimming punch 13. In this embodiment, the
first die base assembly 11 is used as an upper die base assembly;
the second die base assembly 12 is used as a lower die base
assembly. However, due to actual design requirements of the die,
the disclosure is not limited to this pattern.
[0030] The first die base assembly 11 includes a fixing portion
110; the second die base assembly 12 is positioned opposite the
first die base assembly 11. The second die base assembly 12
includes a die cavity portion 120; the die cavity portion 120 has a
die cavity 121 and a die cavity inner wall W. A surface (a surface
of an effective working area) of the die cavity inner wall W has a
plurality of first slant grooves G1 (more than two first slant
grooves G1). In this embodiment, the die cavity portion 120 is
formed of a die block 120a (a lower die block) and a die set 120b
(a lower die set). The blank 20 is arranged on the die cavity
portion 120.
[0031] The trimming punch 13 is applied to the trimming die 1. The
trimming punch 13 has a fixing end portion 131 and a trimming end
portion 132 positioned opposite the fixing end portion 131. The
fixing end portion 131 is disposed at the fixing portion 110; the
trimming end portion 132 is positioned corresponding to the die
cavity 121. An external peripheral surface of the trimming end
portion 132 includes a plurality of second slant grooves G2 (more
than two second slant grooves G2).
[0032] Specifically, the first die base assembly 11 further
includes a bolt element 111 and a blank holder 112 positioned
corresponding to a surface of the die cavity portion 120. An end of
the bolt element 111 is disposed at the fixing portion 110; another
end of the bolt element 111 is disposed at the blank holder 112. A
spring (not shown) may be assembled at the bolt element 111, and
the spring is located between the fixing portion 110 and the blank
holder 112.
[0033] In addition, the first die base assembly 11 and the second
die base assembly 12 further include a guide pillar 14 therebetween
for guiding the opening or closing of the trimming die 1; the first
die base assembly 11 further includes a guide pillar lining 140
corresponding to the guide pillar 14, so as to prevent the guide
pillar 14 from directly contacting and thus damaging the first die
base assembly 11.
[0034] The fixing portion 110 further includes a punch back plate
110a, a punch fixing plate 110b, and a fixing element 15 that joins
the punch back plate 110a and the punch fixing plate 110b. The
fixing end portion 131 of the trimming punch 13 leans against the
punch back plate 110a and is positioned at the punch fixing plate
110b.
[0035] Referring to FIG. 2A to FIG. 2C at the same time, FIG. 2B is
a local schematic view of a trimming die in FIG. 2A when a trimming
punch thereof is performing a trimming operation on a blank; FIG.
2C is a schematic view of a trimming die in FIG. 2A after a
trimming punch thereof performs a trimming operation on a
blank.
[0036] As shown in FIG. 2B, the surface at the die cavity inner
wall W has a plurality of first slant grooves G1, and these first
slant grooves G1 are arranged at intervals. An external peripheral
surface of the trimming end portion 132 of the trimming punch 13
has a plurality of second slant grooves G2. The second slant
grooves G2 are arranged at intervals, and the second slant grooves
G2 have the same length and form an effective working area.
[0037] When an operator wants to perform a trimming operation on a
blank 20, the blank 20 may be placed on the die cavity portion 120.
When the trimming die 1 is driven, the first die base assembly 11
is enabled to approach the second die base assembly 12 under the
guide of the guide pillar 14. As shown in FIG. 2B, the blank 20 is
fixed between the blank holder 112 and the die block 120a.
[0038] At this time (as shown in FIG. 2B), while the trimming punch
13 is performing the trimming operation on the blank 20, the second
slant grooves G2 on the peripheral surface of the trimming end
portion 132 of the trimming punch 13 can reduce a trimming force of
the trimming punch 13 on the blank 20; meanwhile, the first slant
grooves G1 of the die cavity inner wall W can reduce a trimming
force of the blank 20 on an inner side of the die cavity 121,
thereby improving trimming quality of the blank 20. After the
trimming operation is completed, the trimming die 1 turns to a
close-die state (as shown in FIG. 2C).
[0039] Referring to FIG. 3, FIG. 3 is a schematic view of a
trimming die in which grooves of a trimming punch thereof and
grooves of a die cavity inner wall are cross slant grooves
according to another embodiment of the disclosure.
[0040] As shown in FIG. 3, the first slant grooves G1 may be in the
shape of a cross slant groove; and the second slant grooves G2 may
also be in the shape of a cross slant groove. Definitely, in
different designs, the first slant grooves G1 and the second slant
grooves G2 may be column-shaped recesses, V-shaped recesses,
arc-shaped recesses or recesses of other geometrical shapes (for
example, recesses of irregular shapes); the shapes of the grooves
are not limited to the disclosure of FIG. 3. The trimming
processing quality of the blank 20 can also be improved by means of
these patterns.
[0041] It should be noted that, although the trimming punch in the
shape of a round column is taken as an example for description, in
a practical trimming die, in order to cater for the trimming shape
or other requirements of the blank, the trimming punch may also be
in the shape of an elliptic column, a square column, a triangular
column, and the like, and the shape is not limited to the
disclosure of the above embodiment. Moreover, the slant grooves on
the peripheral surface of the trimming end portion of the punch may
also vary along with the shape of the trimming punch. In addition,
the slant grooves (the first slant grooves and the second slant
grooves) on the peripheral surface of the trimming end portion of
the trimming punch and on the die cavity inner wall may also be
applied to cutting faces of an upper cutter and a lower cutter of a
shearing machine.
[0042] In conclusion, exemplary implementations or embodiments
described above are used for illustrating the technical means
adopted in the disclosure to solve the problem, and are not
intended to limit the implementation scope of the disclosure.
Equivalent changes and modifications made following the meaning of
the scope of the patent application or according to the scope of
the patent shall fall within the scope of the patent.
* * * * *