CN114798923A - Stamping die for plate production and use method thereof - Google Patents
Stamping die for plate production and use method thereof Download PDFInfo
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- CN114798923A CN114798923A CN202210376188.4A CN202210376188A CN114798923A CN 114798923 A CN114798923 A CN 114798923A CN 202210376188 A CN202210376188 A CN 202210376188A CN 114798923 A CN114798923 A CN 114798923A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 230000007246 mechanism Effects 0.000 claims abstract description 36
- 238000009434 installation Methods 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 31
- 238000004080 punching Methods 0.000 description 7
- 238000003825 pressing Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
- B21D37/12—Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of dies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Press Drives And Press Lines (AREA)
Abstract
The invention discloses a stamping die for producing plates and a using method thereof, wherein the stamping die comprises a base, the base is connected with a lower die holder for clamping a workpiece, the base is also fixedly connected with a support, the support is connected with an installation block in a sliding manner, and the installation block is connected with the support through a spring; a sliding groove is formed in the mounting block, a rotating shaft is connected in the sliding groove in a sliding manner, and the rotating shaft is connected with a driving mechanism which is used for driving the rotating shaft to slide in the sliding groove; the rotating shaft is rotatably connected with a connecting rod mechanism, the connecting rod mechanism is hinged with the mounting block through a linkage rod, and the connecting rod mechanism is further connected with an upper die base matched with the lower die base. When the stamping device is used for stamping, the upper space of the working cavity can be made free, the clamping and the dismounting of a machine to a workpiece are facilitated, the automation level of equipment is effectively improved, the manual labor is reduced, and the production efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of plate processing, in particular to a stamping die for plate production and a using method thereof.
Background
Stamping is a forming method in which a plate, a strip, a pipe, a profile, or the like is subjected to plastic deformation or separation by applying an external force to the plate, the strip, the pipe, the profile, or the like, thereby obtaining a workpiece having a desired shape and size. The stamped blanks are mainly hot and cold rolled steel sheets and strips. Most of the metal products in the world are made by stamping, such as automobile bodies, chassis, oil tanks, radiator sheets, steam drums of boilers, shells of containers, iron core silicon steel sheets of motors and electric appliances, and the like.
However, the existing punching equipment mainly has the following defects: before the machine works, the top of the pressing device needs to be contacted with the pressing plate, and the process is finished by manually adjusting corresponding screws. The degree of automation of the equipment and the adaptability of the workpiece are poor. In addition, in the gelling and curing processes of the plate, the plate is heavier in weight, so that the plate is usually required to be clamped and disassembled by hoisting equipment, in the existing punching device, the loading device is usually positioned right above the plate and is not beneficial to the clamping and the disassembling of the plate, a manual mode is adopted, multiple persons are required to cooperate, the production efficiency is low, the operation is inconvenient, and too much working strength is caused to workers.
Disclosure of Invention
In order to solve the problems in the prior art, a stamping die for producing a plate and a using method thereof are provided.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention provides a stamping die for producing plates, which comprises a base, wherein the base is connected with a lower die holder used for clamping a workpiece, the base is also fixedly connected with a support, the support is connected with an installation block in a sliding manner, and the installation block is connected with the support through a spring; a sliding groove is formed in the mounting block, a rotating shaft is connected in the sliding groove in a sliding manner, the rotating shaft is connected with a driving mechanism, and the driving mechanism is used for driving the rotating shaft to slide in the sliding groove; the rotating shaft is rotatably connected with a connecting rod mechanism, the connecting rod mechanism is hinged with the mounting block through a linkage rod, and the connecting rod mechanism is further connected with an upper die base matched with the lower die base.
Preferably, the link mechanism comprises two horizontal rods and two inclined rods, the horizontal rods and the inclined rods are hinged end to form a parallelogram structure, the two horizontal rods are parallel to each other, and the two inclined rods are parallel to each other.
Preferably, the horizontal rod that is located the top with the pivot is articulated, and the horizontal rod fixedly connected with backup pad that is located the below, the backup pad with the connection can be dismantled to the upper die base, the backup pad is parallel to each other with the horizontal rod that is located the top.
Preferably, the inclined rod positioned on the left side is hinged with the linkage rod, and the other end of the linkage rod is hinged with the bottom end of the mounting block.
Preferably, when the rotating shaft moves to the bottom end of the sliding groove, the upper die holder moves to a position right above the lower die holder, and a gap is reserved between the upper die holder and the workpiece.
Preferably, the driving mechanism comprises an oil cylinder, the oil cylinder is fixedly connected with the support, the oil cylinder comprises an oil cylinder push rod, the oil cylinder push rod is rotatably connected with the rotating shaft, and the oil cylinder push rod is perpendicular to the horizontal rods.
Preferably, the spring is arranged under the mounting block, the upper end of the spring is connected with the mounting block, and the lower end of the spring is connected with the bracket.
Preferably, in an initial state, the spring is in a compressed state, and a friction force generated by sliding of the rotating shaft in the sliding groove is smaller than an elastic force of the spring.
Preferably, the support is fixedly connected with a guide rail arranged in the vertical direction, the guide rail is connected with a sliding block in a sliding manner, and the sliding block is fixedly connected with the mounting block.
The invention also provides a use method of the stamping die for producing the plate, the stamping die for producing the plate is adopted, the initial pressure value is preset to be P in the controller, and the method comprises the following steps:
s1: firstly, placing a workpiece in a lower die holder, selecting a corresponding upper die holder to be connected with a supporting plate, starting an oil cylinder, and driving a rotating shaft to slide in a sliding groove by an oil cylinder push rod;
s2: under the action of the spring, the position of the mounting block relative to the bracket is kept unchanged, the rotating shaft drives the supporting plate to move through the connecting rod mechanism, and when the rotating shaft moves to the bottom end of the sliding chute, the upper die base moves to a position right above the lower die base and a gap is reserved between the upper die base and the workpiece;
s3: the oil cylinder drives the oil cylinder push rod to continue moving, the rotating shaft drives the mounting block to move downwards along the support, the upper die base and the lower die base are matched with each other, machining of a workpiece is completed, and in the process, the spring is compressed.
Compared with the prior art, the invention has the beneficial effects that:
1. the upper die holder is provided with the connecting rod mechanism, the horizontal rod and the oblique rod are matched with each other to form a parallelogram mechanism, the upper die holder is always in a parallel state in the moving process by utilizing the characteristics of the parallelogram mechanism, and the upper die holder is more stable and reliable when moving, so that the whole upper die holder is always kept stable, the upper die holder is prevented from shaking, the upper die holder and the lower die holder are conveniently matched with each other, and the pressing work of workpieces is realized.
2. According to the invention, by utilizing the principle that the hinge point can move spatially when the parallelogram structure deforms, the upper die base is positioned on one side of the lower die base in an initial state, and the upper die base can give up the upper space of the working cavity of the lower die base, so that the workpiece can be clamped and unloaded by adopting machinery, the automation level of equipment is effectively improved, the manual labor is reduced, and the production efficiency is greatly improved.
3. The invention is also provided with a spring, and the friction force generated by the sliding of the rotating shaft in the sliding groove is smaller than the elastic force of the spring, so when the oil cylinder drives the rotating shaft to move, the rotating shaft is firstly driven to slide in the sliding groove under the action of the spring, so that the connecting rod mechanism is firstly deformed, the upper die base can move right above the lower die base, then the spring is compressed along with the movement of the oil cylinder, the sliding block and the guide rail are mutually matched, and the friction force borne by the mounting block in the stamping process can be reduced.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a front view of the present invention (working condition one);
FIG. 2 is a front view of the present invention (working state two);
fig. 3 is an overall front view (operation state three) of the present invention.
Description of reference numerals:
1, a base; 2, a bracket; 3, a spring; 4, a guide rail; 5, a sliding block; 6, mounting a block; 7, an oil cylinder; 8, horizontal rods; 9, an upper die holder; 10, workpiece; 11, a lower die holder; 12 oil cylinder push rod; 13 chute; 14 a rotating shaft; 15 a linkage 16 supporting plate; 17 diagonal rods.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As shown in fig. 1 to 3, the present embodiment provides a stamping die for sheet production, which includes a base 1, and the base 1 is connected to a lower die holder 11 for holding a workpiece 10. The lower die holder 11 comprises two clamping plates which are symmetrically arranged, a double-end oil cylinder is fixedly connected to the base 1, and two ends of the double-end oil cylinder are respectively connected with the two clamping plates, so that when the double-end oil cylinder works, the two clamping plates move in opposite directions, the clamping work of the workpiece 10 can be carried out through the clamping plates, and the clamping device can be applied to clamping the workpieces 10 with different diameters. Because the two clamping plates move in opposite directions, the lower die holder 11 and the upper die holder 9 can be conveniently matched with each other, so that the stamping work of the workpiece 10 is realized, and the movement track of the upper die holder 9 does not need to be adjusted.
The base 1 is also fixedly connected with a support 2, the support 2 is connected with an installation block 6 in a sliding manner, and the installation block 6 is connected with the support 2 through a spring 3; a sliding groove 13 is formed in the mounting block 6, a rotating shaft 14 is connected in the sliding groove 13 in a sliding manner, and the rotating shaft 14 is connected with a driving mechanism which is used for driving the rotating shaft 14 to slide in the sliding groove 13; the rotating shaft 14 is rotatably connected with a connecting rod mechanism, the connecting rod mechanism is hinged with the mounting block 6 through a linkage rod 15, and the connecting rod mechanism is further connected with an upper die base 9 matched with the lower die base 11.
The link mechanism comprises two horizontal rods 8 and two inclined rods 17, the horizontal rods 8 and the inclined rods 17 are hinged end to form a parallelogram structure, the two horizontal rods 8 are parallel to each other, and the two inclined rods 17 are parallel to each other. The horizontal rod 8 and the oblique rod 17 are mutually matched, and the characteristics of the parallelogram structure are utilized to enable the upper die base 9 to be in a parallel state all the time in the moving process, and the upper die base 9 is more stable and reliable in motion, and the whole upper die base 9 is beneficial to being always kept stable, so that the situation that the upper die base 9 shakes is prevented from occurring, the upper die base 9 and the lower die base 11 are mutually matched conveniently, and the pressing work of workpieces is realized.
The horizontal rod 8 located above is hinged to the rotating shaft 14, the horizontal rod 8 located below is fixedly connected with a supporting plate 16, the supporting plate 16 is detachably connected with the upper die base 9, accordingly, the upper die base 9 can be replaced conveniently, and the supporting plate 16 is parallel to the horizontal rod 8 located above.
The inclined rod 17 positioned on the left side is hinged with the linkage rod 15, and the other end of the linkage rod 15 is hinged with the bottom end of the mounting block 6. The trace 15 plays spacing effect for link mechanism's motion, and under the effect of trace 15, the motion of down tube 17 receives the restriction of trace 15 to make parallel bar 8 remain the parallel direction setting throughout, do benefit to going on of punching press work.
When the rotating shaft 14 moves to the bottom end of the sliding chute 13, the upper die base 9 moves to a position right above the lower die base 11 and a gap is reserved between the upper die base and the workpiece 10. Under initial condition, upper die base 9 is located one side of lower bolster 11 to conveniently carry out the handling work of work piece 10 through handling mechanism, need not artifical transport, effectively saved manpower resources, effectively improved the efficiency of work.
The driving mechanism comprises an oil cylinder 7, the oil cylinder 7 is fixedly connected with the support 2, the oil cylinder 7 comprises an oil cylinder push rod 12, the oil cylinder push rod 12 is rotatably connected with the rotating shaft 14, and the oil cylinder push rod 12 is perpendicular to the horizontal rod 8. The movement of the oil cylinder 7 and the rotating shaft 14 provides enough power.
In the initial state, the spring 3 is in a compressed state, and the friction force generated by the sliding of the rotating shaft 14 in the sliding slot 13 is smaller than the elastic force of the spring 3. Because the spring 3 is always in a compressed state, the oil cylinder 7 needs to overcome the elastic force of the spring 3 at the stage of starting to move, and therefore, the elastic force of the spring 3 is larger, so that the mounting block 6 can be kept in a relatively fixed state, and therefore, when the oil cylinder 7 moves, the rotating shaft 14 can be firstly driven to slide in the sliding groove 13.
The support 2 is fixedly connected with a guide rail 4 arranged in the vertical direction, the guide rail 4 is slidably connected with a sliding block 5, and the sliding block 5 is fixedly connected with an installation block 6. Adopt the mode that guide rail 4 and slider 5 mutually supported, effectively reduce the frictional force that installation piece 6 received when removing, when the bottom of pivot 14 and spout 13 contacts, accessible pivot 14 drives installation piece 6 downstream, improves the impact force of punching press during operation, does benefit to the suppression work of work piece 10.
The invention also provides a use method of the stamping die for producing the plate, and the stamping die for producing the plate also comprises the step of presetting the initial pressure value in the controller to be P 0 The method comprises the following steps:
s1: firstly, a workpiece 10 is placed in a lower die holder 11, then a corresponding upper die holder 9 is selected to be connected with a supporting plate 16, an oil cylinder 7 is started, and an oil cylinder push rod 12 drives a rotating shaft 14 to slide in a sliding groove 13;
s2: under the action of the spring 3, the position of the mounting block 6 relative to the bracket 2 is kept unchanged, the rotating shaft 14 drives the supporting plate 16 to move through the connecting rod mechanism, and when the rotating shaft 14 moves to the bottom end of the sliding groove 13, the upper die base 9 moves to a position right above the lower die base 11 and a gap is reserved between the upper die base and the workpiece 10;
s3: along with the oil cylinder 7 driving the oil cylinder push rod 12 to move continuously, the rotating shaft 14 drives the mounting block 6 to move downwards along the support 2, the upper die base 9 and the lower die base 11 are matched with each other, so that the processing work of the workpiece 10 is completed, and in the process, the spring 3 is compressed.
It should be noted that the horizontal rod 8 and the oblique rod 17 are mutually matched to form a parallelogram mechanism, and the characteristics of the parallelogram mechanism are utilized to enable the upper die holder 9 to be in a parallel state all the time in the moving process, and the upper die holder 9 is more stable and reliable when moving, and is beneficial to keeping the whole upper die holder 9 stable all the time, so that the upper die holder 9 is prevented from shaking, and the upper die holder 9 and the lower die holder 11 are conveniently mutually matched to realize the pressing work of the workpiece 10.
In addition, this application still utilizes the parallelogram structure to take place the principle that the space removes can take place for the pin joint when warping, and under initial condition, upper die base 9 is located one side of die holder 11, and upper die base 9 can give way the upper space of die holder 11 working chamber, is favorable to adopting machinery to the clamping of work piece with lift off, has effectively improved the automation level of equipment, has reduced hand labor, very big improvement production efficiency.
In addition, because of the pivot 14 produced in the spout 13 that slides frictional force is less than the elasticity of spring 3, consequently when the hydro-cylinder 7 drives the pivot motion, under the effect of spring 3, can drive pivot 14 at first and slide in spout 13, thereby make link mechanism take place deformation earlier, make upper die base 9 can move to the die holder 11 directly over, then along with the motion of hydro-cylinder 7, spring 3 compresses, slider 5 and guide rail 4 mutually support, can reduce the frictional force that the installation piece 6 received in the punching press process again, consequently overcome spring elasticity 3 after, upper die base 9 can carry out the punching press work of work piece 10, effectively improved the precision and the efficiency of punching press, convenient operation, and is rational in infrastructure, and design benefit, has high spreading value.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The stamping die for producing the plates comprises a base (1) and is characterized in that the base (1) is connected with a lower die holder (11) used for clamping a workpiece (10), the base (1) is also fixedly connected with a support (2), the support (2) is connected with an installation block (6) in a sliding manner, and the installation block (6) is connected with the support (2) through a spring (3); a sliding groove (13) is formed in the mounting block (6), a rotating shaft (14) is connected in the sliding groove (13) in a sliding manner, the rotating shaft (14) is connected with a driving mechanism, and the driving mechanism is used for driving the rotating shaft (14) to slide in the sliding groove (13); the rotating shaft (14) is rotatably connected with a connecting rod mechanism, the connecting rod mechanism is hinged with the mounting block (6) through a linkage rod (15), and the connecting rod mechanism is further connected with an upper die base (9) matched with the lower die base (11).
2. A stamping die for sheet production according to claim 1, wherein the linkage mechanism comprises two horizontal bars (8) and two diagonal bars (17), the horizontal bars (8) and the diagonal bars (17) are hinged end to form a parallelogram structure, the two horizontal bars (8) are parallel to each other, and the two diagonal bars (17) are parallel to each other.
3. The stamping die for producing sheet materials as claimed in claim 2, wherein the upper horizontal bar (8) is hinged with the rotating shaft (14), the lower horizontal bar (8) is fixedly connected with a support plate (16), the support plate (16) is detachably connected with the upper die holder (9), and the support plate (16) and the upper horizontal bar (8) are parallel to each other.
4. The stamping die for producing the plates as claimed in claim 3, wherein the inclined rod (17) on the left side is hinged with the linkage rod (15), and the other end of the linkage rod (15) is hinged with the bottom end of the mounting block (6).
5. The stamping die for producing plates as claimed in claim 4, wherein when the rotating shaft (14) moves to the bottom end of the chute (13), the upper die holder (9) moves to a position right above the lower die holder (11) and has a gap with the workpiece (10).
6. The stamping die for producing plates as claimed in claim 5, wherein the driving mechanism comprises an oil cylinder (7), the oil cylinder (7) is fixedly connected with the bracket (2), the oil cylinder (7) comprises an oil cylinder push rod (12), the oil cylinder push rod (12) is rotatably connected with the rotating shaft (14), and the oil cylinder push rod (12) is perpendicular to the horizontal rod (8).
7. The stamping die for producing sheet materials as claimed in claim 1, wherein the spring (3) is arranged right below the mounting block (6), the upper end of the spring (3) is connected with the mounting block (6), and the lower end of the spring (3) is connected with the bracket (2).
8. A stamping die for sheet production according to claim 7, wherein in an initial state, the spring (3) is in a compressed state, and the friction force generated by the sliding of the rotating shaft (14) in the sliding slot (13) is smaller than the elastic force of the spring (3).
9. The stamping die for producing plates as claimed in claim 1, wherein the bracket (2) is fixedly connected with a guide rail (4) arranged in a vertical direction, the guide rail (4) is slidably connected with a sliding block (5), and the sliding block (5) is fixedly connected with the mounting block (6).
10. A method for using a sheet-producing press die, characterized in that a sheet-producing press die according to any one of claims 6 to 9 is used, comprising the steps of:
s1: firstly, a workpiece (10) is placed in a lower die holder (11), then a corresponding upper die holder (9) is selected to be connected with a supporting plate (16), an oil cylinder (7) is started, and an oil cylinder push rod (12) drives a rotating shaft (14) to slide in a sliding groove (13);
s2: under the action of the spring (3), the position of the mounting block (6) relative to the support (2) is kept unchanged, the rotating shaft (14) drives the supporting plate (16) to move through the connecting rod mechanism, and when the rotating shaft (14) moves to the bottom end of the sliding groove (13), the upper die base (9) moves to a position right above the lower die base (11) and a gap is reserved between the upper die base and the workpiece (10);
s3: along with the oil cylinder (7) driving the oil cylinder push rod (12) to move continuously, the rotating shaft (14) drives the mounting block (6) to move downwards along the bracket (2), the upper die holder (9) and the lower die holder (11) are matched with each other, so that the processing work of the workpiece (10) is completed, and in the process, the spring (3) is compressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210376188.4A CN114798923A (en) | 2022-04-11 | 2022-04-11 | Stamping die for plate production and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210376188.4A CN114798923A (en) | 2022-04-11 | 2022-04-11 | Stamping die for plate production and use method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114798923A true CN114798923A (en) | 2022-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210376188.4A Pending CN114798923A (en) | 2022-04-11 | 2022-04-11 | Stamping die for plate production and use method thereof |
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| Country | Link |
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| CN (1) | CN114798923A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08141647A (en) * | 1994-11-22 | 1996-06-04 | Maru Kikai Kogyo Kk | Bending device |
| US5850687A (en) * | 1995-03-10 | 1998-12-22 | Amada America, Inc. | Machine and a method for driving inserts into pieces of sheet metal |
| CN101670402A (en) * | 2009-09-23 | 2010-03-17 | 山东潍坊福田模具有限责任公司 | Pre-bending device of pressing die |
| CN105251920A (en) * | 2015-11-13 | 2016-01-20 | 重庆海獒精密锻造有限公司 | Press |
| CN214977173U (en) * | 2021-05-10 | 2021-12-03 | 山东交通学院 | Stamping die with replaceable stamping die head |
| CN114029374A (en) * | 2021-10-19 | 2022-02-11 | 陈保强 | Automatic change bilateral bender |
-
2022
- 2022-04-11 CN CN202210376188.4A patent/CN114798923A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08141647A (en) * | 1994-11-22 | 1996-06-04 | Maru Kikai Kogyo Kk | Bending device |
| US5850687A (en) * | 1995-03-10 | 1998-12-22 | Amada America, Inc. | Machine and a method for driving inserts into pieces of sheet metal |
| CN101670402A (en) * | 2009-09-23 | 2010-03-17 | 山东潍坊福田模具有限责任公司 | Pre-bending device of pressing die |
| CN105251920A (en) * | 2015-11-13 | 2016-01-20 | 重庆海獒精密锻造有限公司 | Press |
| CN214977173U (en) * | 2021-05-10 | 2021-12-03 | 山东交通学院 | Stamping die with replaceable stamping die head |
| CN114029374A (en) * | 2021-10-19 | 2022-02-11 | 陈保强 | Automatic change bilateral bender |
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