CN116060518A - Locking device of bending die - Google Patents

Locking device of bending die Download PDF

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Publication number
CN116060518A
CN116060518A CN202310264977.3A CN202310264977A CN116060518A CN 116060518 A CN116060518 A CN 116060518A CN 202310264977 A CN202310264977 A CN 202310264977A CN 116060518 A CN116060518 A CN 116060518A
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China
Prior art keywords
die
rod
swing
locking device
hole
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Granted
Application number
CN202310264977.3A
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Chinese (zh)
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CN116060518B (en
Inventor
李普天
陈敏
曾彬彬
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Xiamen Hiprecise Technology Co ltd
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Xiamen Hiprecise Technology Co ltd
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Priority to CN202310264977.3A priority Critical patent/CN116060518B/en
Publication of CN116060518A publication Critical patent/CN116060518A/en
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Publication of CN116060518B publication Critical patent/CN116060518B/en
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    • 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
    • B21D37/04—Movable or exchangeable mountings for tools
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57—Improving the yield, e-g- reduction of reject rates

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

The invention discloses a locking device of a bending die, which comprises a first die rod and a second die rod which are arranged vertically at opposite intervals, wherein the locking device comprises: the first swinging driving piece is connected with the first swinging disc; the friction plate is arranged at the top of the first die rod; the rotation center of the swinging disc is pivoted to the top of the second mould rod, an Archimedes spiral groove is formed in the bottom surface of the swinging disc, the first swinging driving piece is suitable for driving the swinging disc to swing between a first position and a second position, the Archimedes spiral groove is abutted with the friction plate in the first position, and the Archimedes spiral groove is separated from the friction plate in the second position. The locking device is simple in structure, can automatically lock and unlock the bending die, does not need manual operation, and can realize continuous bending.

Description

Locking device of bending die
Technical Field
The invention relates to the technical field of busbar processing, in particular to a locking device of a bending die.
Background
The locking device of the bending mould in the traditional busbar bending machine is shown in figure 1, the tops of the two bending moulds are locked by adopting the pressing plate, so that the upper end of the mould is prevented from being propped open to be inverted splayed in the bending process, and the bending precision is influenced. However, the locking device shown in fig. 1 requires manual operation, and the locking device is locked before each bending and released after bending, otherwise the next bending is affected. Therefore, the efficiency is low and the working strength is high. The locking device of the bending die in the related art is complex in structure and large in occupied space.
Disclosure of Invention
The present invention aims to solve at least to some extent one of the technical problems in the above-described technology. Therefore, the invention aims to provide a locking device of a bending die, which has a simple structure, can realize automatic locking and loosening of the bending die, does not need manual operation, and can realize continuous bending.
To achieve the above object, an embodiment of the present invention provides a locking device for a bending die, the bending die including a first die rod and a second die rod which are arranged vertically at opposite intervals, the locking device including: the first swinging driving piece is connected with the first swinging disc;
the friction plate is arranged at the top of the first die rod;
the rotation center of the swinging disc is pivoted to the top of the second die rod, the bottom surface of the swinging disc is provided with an Archimedes spiral groove,
the first swing driving piece is suitable for driving the swing disc to swing between a first position and a second position, wherein the Archimedes spiral groove is in contact with the friction plate in the first position, and the Archimedes spiral groove is separated from the friction plate in the second position.
According to the locking device for the bending die, disclosed by the invention, the Archimedes spiral groove on the swinging disc is utilized to make the center distance from the rotation center of the swinging disc smaller or larger when the swinging disc swings, so that the Archimedes spiral groove can be abutted against or separated from the friction plate, and the swinging disc arranged on the second die rod locks or unlocks the top of the second die rod and the top of the first die rod, thus the automatic locking and unlocking of the bending die can be realized, manual operation is not needed, continuous bending can be realized, the whole structure of the device is simple, and the device can be suitable for locking of bending dies with different pitches.
In addition, the locking device of the bending die provided by the invention can also have the following additional technical characteristics:
optionally, the first swing driving piece includes the connecting rod, the top surface of wobble plate is equipped with the convex part, be equipped with on the connecting rod and supply the smooth hole that the convex part inserted, when the connecting rod swings, the convex part removes in the smooth hole and drives the wobble plate is in the swing between the first position and the second position.
Further, the die further comprises a mounting plate, wherein the mounting plate is arranged on the second die rod, the sliding hole is formed in one end portion of the connecting rod, and the other end portion of the connecting rod is pivotably arranged on the mounting plate.
Further, the first swing driving piece comprises a first air cylinder, and a piston rod of the first air cylinder is connected with a rod body of the connecting rod to drive the connecting rod to swing.
Optionally, the mold further comprises a locking assembly suitable for locking the bottom of the first mold rod or/and the second mold rod, wherein the locking assembly comprises a mold seat, a pressing disc and a second swing driving piece;
the outer circumferential surface of the bottom of the first die rod or the second die rod is provided with external threads;
the pressing disc is pivotally arranged in the die seat and is provided with a central through hole, and an internal thread is arranged in the central through hole;
the second swing driving piece is suitable for driving the pressing disc to rotate so that the pressing disc is in threaded connection with the first die rod or the second die rod. Therefore, the bottom of the first die rod or/and the second die rod is automatically locked by the locking assembly, and the whole locking assembly can be suitable for occasions with small height direction size and insufficient height direction space of the bending die.
Further, a plurality of first protruding blocks are arranged on the outer circumferential surface of the bottom of the first die rod or the second die rod, and the plurality of first protruding blocks are uniformly distributed along the outer circumferential surface of the die rod to jointly construct the external thread;
and a plurality of second lugs are arranged on the hole wall of the central through hole, and are uniformly distributed along the inner peripheral surface of the central through hole to jointly construct the internal thread.
Further, the second swing driving piece comprises a pushing plate and a second air cylinder, an inclined hole is formed in the pushing plate, a convex column is arranged on the pressing disc, the convex column is inserted into the inclined hole and suitable for moving in the inclined hole, and the second air cylinder is connected with the pushing plate to drive the pushing plate to move so that the inclined hole drives the pressing disc to rotate.
Further, a counter bore is formed in the die seat from the bottom surface upwards, and the pressing disc is pivotably arranged in the counter bore.
Drawings
FIG. 1 is a prior art folding die locking device;
fig. 2 is a schematic structural view of a locking device of a bending die according to an embodiment of the present invention;
FIG. 3 is a partial schematic view of a locking device of a bending die according to an embodiment of the invention;
FIG. 4 is an exploded view of the partial components of FIG. 3;
FIG. 5 is a partially exploded view of a locking device of a bending die according to an embodiment of the present invention;
FIG. 6 is a schematic view of a mold base according to an embodiment of the invention;
reference numerals illustrate:
a first die rod 1 and a first bump 11;21, a step of;
a second mold bar 2;
the swing disc 31, the archimedes spiral groove 311, the convex portion 312, the first swing driver 32, the connecting rod 321, the slide hole 322, the first cylinder 323, the friction plate 33, the mounting plate 34, the clamping groove 341, the die holder 35, the counter bore 351, the pressing disc 36, the center through hole 361, the second convex portion 362, the convex post 363, the second swing driver 37, the push plate 371, the second cylinder 372, the inclined hole 373.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In order that the above-described aspects may be better understood, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
A locking device for a bending die according to an embodiment of the present invention, which can automatically lock the bending die to a bending machine so as to perform bending operation on a busbar, will be described with reference to fig. 2 to 6. The bending die comprises a first die rod 1 and a second die rod 2 which are vertically arranged at opposite intervals, a gap between the first die rod 1 and the second die rod 2 is used for feeding a busbar, and the busbar can be clamped after feeding to carry out bending operation.
The locking device of the bending die according to the embodiment of the invention includes a swing plate 31, a first swing driver 32, and a friction plate 33.
Specifically, the friction plate 33 is provided on the top of the first die rod 1; the rotation center of the swinging disc 31 is pivoted to the top of the second mold rod 2, the bottom surface of the swinging disc 31 is provided with an archimedes spiral groove 311, and the first swinging driver 32 is adapted to drive the swinging disc 31 to swing between a first position, in which the archimedes spiral groove 311 is in contact with the friction plate 33, and a second position, in which the archimedes spiral groove 311 is separated from the friction plate 33.
It will be appreciated that the walls of the archimedes 'spiral groove 311 are arcuate surfaces, the distance from the arcuate surfaces to the centre of rotation being gradually varied, whereby the archimedes' spiral groove 311 on the first mold bar 1 may abut or separate from the friction plate 33 on the second mold bar 2 as the wobble plate 31 wobbles between the first and second positions to lock and self-lock or unlock the first mold bar 1 to the second mold bar 2.
Therefore, according to the locking device for the bending die provided by the invention, the Archimedes spiral groove 311 on the swinging disc 31 is utilized to make the center distance from the rotation center of the swinging disc 31 smaller or larger when the swinging disc 31 swings, so that the Archimedes spiral groove 311 can be abutted against or separated from the friction plate 33, and the swinging disc 31 arranged on the second die rod 2 locks and locks or unlocks the second die rod 2 and the top of the first die rod 1, thus the automatic locking and unlocking of the bending die can be realized, continuous bending can be realized without manual operation, the device has a simple integral structure, and the locking device can be suitable for the locking of bending dies with different intervals.
As for the first swing driving member 32, it drives the swing disk 31 to swing around its rotation center line. Specifically, the first swing driving member 32 includes a connecting rod 321, a protrusion 312 is disposed on a top surface of the swing disc 31, a sliding hole 322 into which the protrusion 312 is inserted is disposed on the connecting rod 321, and when the connecting rod 321 swings, the protrusion 312 moves in the sliding hole 322 to drive the swing disc 31 to swing between a first position and a second position, that is, to swing until the archimedes spiral groove 311 abuts against or separates from the friction plate 33. That is, the link 321 is driven to swing, the protrusion 312 is driven to move through the sliding hole 322, and the swing disc 31 is driven to swing, so that the groove wall of the archimedes spiral groove 311 is smaller or larger from the center distance of the rotation center of the swing disc 31 when the swing disc 31 swings, and the archimedes spiral groove 311 can be abutted or separated from the friction plate 33. It is understood that the abutment is that the groove wall of the archimedes spiral groove 311 abuts against the side wall of the friction plate 33.
In addition, the arrangement of the connecting rod 321 and the cooperation of the convex portion 312 and the sliding hole 322 can enlarge the swinging angle of the swinging disc 31, the swinging angle is large, the self-locking range can be increased, the helix angle of the Archimedes spiral groove 311 can be reduced, and the self-locking property can be improved.
Further, the first swing driving part 32 includes a first cylinder 323, and a piston rod of the first cylinder 323 is connected to a rod body of the link 321 to drive the link 321 to swing.
Specifically, the apparatus further includes a mounting plate 34, the mounting plate 34 is provided on the second mold bar 2, a slide hole 322 is provided at one end portion of the link 321, and the other end portion of the link 321 is pivotably provided on the mounting plate 34. Thus, the first cylinder 323 drives the link 321 to swing, and thus drives the swing disk 31 to swing.
For the mounting plate 34, referring to fig. 4, a clamping groove 341 is formed in the mounting plate 34, a clamping block is arranged at the top of the second mold rod 2, and the clamping block is clamped in the clamping groove 341 so that the mounting plate 34 is arranged on the second mold rod 2. It will be appreciated that in this connection, the top of the second mold rod 2 is penetrated from the rotation center of the swing plate 31, and the rotation center of the swing plate 31 is pivoted to the top of the second mold rod 2.
When two mold rods are required to be locked, the piston rod of the first cylinder 323 is retracted, the connecting rod 321 is pulled to swing, and then the swinging disc 31 is driven to swing until the Archimedes spiral groove 311 is abutted against the friction plate 33, so that the purpose of locking two molds is achieved.
Therefore, due to the adoption of the Archimedes spiral groove 311, even when the bus bars with different thicknesses are bent, the device can lock and self-lock the two die bars. The device can realize locking and self-locking of the bending die within the range of 3 mm-12.5 mm of the bending busbar thickness, and prevent the bending die from being opened.
Referring to fig. 3, 5 and 6, for locking the bottoms of the first mold bar 1 and the second mold bar 2, a locking assembly may be provided at the bottom thereof, and in particular, the locking assembly includes a mold base 35, a pressing plate 36 and a second swing driver 37; the outer circumferential surface of the bottom of the first die rod 1 or the second die rod 2 is provided with external threads; the pressing disc 36 is pivotally arranged in the die seat 35, the pressing disc 36 is provided with a central through hole 361, and internal threads are arranged in the central through hole 361; the second swing driving member 37 is adapted to drive the pressing plate 36 to rotate so that the pressing plate 36 is screwed with the first die rod 1 or the second die rod 2.
That is, the second swing driving member 37 drives the pressing plate 36 to rotate, so that the pressing plate 36 is screwed with the mold rod to lock the mold rod to the mold base 35.
In a specific example, a plurality of first protruding blocks (11; 21) are arranged on the outer circumferential surface of the bottom of the first die rod 1 or the second die rod 2, and the plurality of first protruding blocks (11; 21) are uniformly distributed along the outer circumferential surface to jointly construct the external thread; that is, the first projections (11; 21) are spirally distributed along the outer peripheral surface of the die rod.
The hole wall of the central through hole 361 is provided with a plurality of second protruding blocks 362, and the second protruding blocks 362 are uniformly distributed along the inner peripheral surface of the central through hole 361 to form internal threads together. That is, the plurality of second bumps 362 are spirally distributed along the inner circumferential surface of the central through hole 361.
Thus, the second swing driving member 37 drives the pressing plate 36 to rotate, so that the pressing plate 36 is screwed with the mold rod to lock the mold rod to the mold base 35.
For the second swing driving member 37, the second swing driving member may include a push plate 371 and a second air cylinder 372, wherein the push plate 371 is provided with an inclined hole 373, the pressing plate 36 is provided with a protrusion 363, the protrusion 363 is inserted into the inclined hole 373 and is suitable for moving in the inclined hole 373, and the second air cylinder 372 is connected with the push plate 371 to drive the push plate 371 to move so that the inclined hole 373 drives the pressing plate 36 to rotate. That is, the push plate 371 is moved by the second cylinder 372 to engage the inclined hole 373 with the boss 363 to drive the pressing plate 36 to rotate and lock with the mold rod, and the push plate 371 is moved by the second cylinder 372 to engage the inclined hole 373 with the boss 363 to drive the pressing plate 36 to rotate and unlock with the mold rod, by the second cylinder 372 to retract the piston rod.
Thus, only one cylinder is used for locking and unlocking the bottom of the mold rod and the mold seat 35; the bottom of the first die rod 1 or/and the second die rod 2 is automatically locked by the locking assembly, and the whole locking assembly can be suitable for occasions with small height direction size and insufficient height direction space of the bending die.
Further, a counterbore 351 is formed in the die holder 35 from the bottom surface upward, and a pressing plate 36 is pivotably provided in the counterbore 351. The counter bore 351 of the die holder 35 and the bottom of the first die rod 1 or the second die rod 2 are both conical.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms should not be understood as necessarily being directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (8)

1. A locking device of a bending die, the bending die including a first die rod and a second die rod arranged vertically at opposite intervals, the locking device comprising: the first swinging driving piece is connected with the first swinging disc;
the friction plate is arranged at the top of the first die rod;
the rotation center of the swinging disc is pivoted to the top of the second die rod, the bottom surface of the swinging disc is provided with an Archimedes spiral groove,
the first swing driving piece is suitable for driving the swing disc to swing between a first position and a second position, wherein the Archimedes spiral groove is in contact with the friction plate in the first position, and the Archimedes spiral groove is separated from the friction plate in the second position.
2. The bending die locking device according to claim 1, wherein the first swing driving member comprises a connecting rod, a protruding portion is arranged on the top surface of the swing disc, a sliding hole is formed in the connecting rod, the protruding portion is inserted into the sliding hole, and when the connecting rod swings, the protruding portion moves in the sliding hole to drive the swing disc to swing between the first position and the second position.
3. The bending die locking device of claim 2, further comprising a mounting plate provided on the second die bar, the slide hole being provided at one end portion of the link, the other end portion of the link being pivotably provided on the mounting plate.
4. The bending die locking device according to claim 2, wherein the first swing driving member includes a first cylinder, and a piston rod of the first cylinder is connected to a rod body of the link to drive the link to swing.
5. The bending die locking device of claim 1, further comprising a locking assembly adapted to lock the bottom of the first die bar or/and the second die bar, the locking assembly comprising a die holder, a hold down plate, and a second swing drive;
the outer circumferential surface of the bottom of the first die rod or the second die rod is provided with external threads;
the pressing disc is pivotally arranged in the die seat and is provided with a central through hole, and an internal thread is arranged in the central through hole;
the second swing driving piece is suitable for driving the pressing disc to rotate so that the pressing disc is in threaded connection with the first die rod or the second die rod.
6. The bending die locking device according to claim 5, wherein a plurality of first protruding blocks are arranged on the outer circumferential surface of the bottom of the first die rod or the second die rod, and the plurality of first protruding blocks are uniformly distributed along the outer circumferential surface of the die rod to jointly construct the external thread;
and a plurality of second lugs are arranged on the hole wall of the central through hole, and are uniformly distributed along the inner peripheral surface of the central through hole to jointly construct the internal thread.
7. The bending die locking device according to claim 5, wherein the second swing driving member comprises a push plate and a second air cylinder, wherein the push plate is provided with an inclined hole, the pressing plate is provided with a convex column, the convex column is inserted into the inclined hole and is suitable for moving in the inclined hole, and the second air cylinder is connected with the push plate to drive the push plate to move so that the inclined hole drives the pressing plate to rotate.
8. The bending die locking device according to claim 5, wherein a counter bore is formed in the die holder from the bottom surface upward, and the pressing plate is pivotably provided in the counter bore.
CN202310264977.3A 2023-03-20 2023-03-20 Locking device of bending die Active CN116060518B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310264977.3A CN116060518B (en) 2023-03-20 2023-03-20 Locking device of bending die

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Application Number Priority Date Filing Date Title
CN202310264977.3A CN116060518B (en) 2023-03-20 2023-03-20 Locking device of bending die

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CN116060518A true CN116060518A (en) 2023-05-05
CN116060518B CN116060518B (en) 2023-06-16

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008152536A2 (en) * 2007-06-11 2008-12-18 Rolleri S.P.A. Device for locking of dies on press brakes
CN109647940A (en) * 2019-01-22 2019-04-19 厦门海普锐科技股份有限公司 The machining center of bending machine and busbar
CN111167949A (en) * 2020-02-28 2020-05-19 王勇 Locking mechanism and bending die rapid clamping system comprising same
CN112317567A (en) * 2020-09-30 2021-02-05 厦门海普锐科技股份有限公司 Bending equipment with multiple bending fillets and bending method
CN217315422U (en) * 2022-05-05 2022-08-30 济南森峰激光科技股份有限公司 Mould locking device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008152536A2 (en) * 2007-06-11 2008-12-18 Rolleri S.P.A. Device for locking of dies on press brakes
CN109647940A (en) * 2019-01-22 2019-04-19 厦门海普锐科技股份有限公司 The machining center of bending machine and busbar
CN111167949A (en) * 2020-02-28 2020-05-19 王勇 Locking mechanism and bending die rapid clamping system comprising same
CN112317567A (en) * 2020-09-30 2021-02-05 厦门海普锐科技股份有限公司 Bending equipment with multiple bending fillets and bending method
CN217315422U (en) * 2022-05-05 2022-08-30 济南森峰激光科技股份有限公司 Mould locking device

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