CN212945114U - Combined pneumatic edge folding machine convenient for door frame - Google Patents
Combined pneumatic edge folding machine convenient for door frame Download PDFInfo
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- CN212945114U CN212945114U CN202021210554.1U CN202021210554U CN212945114U CN 212945114 U CN212945114 U CN 212945114U CN 202021210554 U CN202021210554 U CN 202021210554U CN 212945114 U CN212945114 U CN 212945114U
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- 238000005452 bending Methods 0.000 claims abstract description 49
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 2
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 2
- 241001330002 Bambuseae Species 0.000 claims description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 2
- 239000011425 bamboo Substances 0.000 claims description 2
- 238000009957 hemming Methods 0.000 claims 6
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000002788 crimping Methods 0.000 claims 1
- 238000011017 operating method Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 2
- 241000252254 Catostomidae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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Abstract
The utility model discloses a combined pneumatic flanging machine convenient for door frames to use, which comprises a bottom plate, a supporting component, a pressing mechanism, a bending mechanism and a positioning component, wherein the bottom plate is in a rectangular plate shape horizontally and transversely placed, a fixed plate is arranged in the middle of the top surface of the bottom plate, a door frame folded plate is arranged on the top surface of the fixed plate, and the fixed plate is movably connected with the door frame folded plate through the supporting component; a pair of vertical plates are arranged at two ends of the top surface of the bottom plate, a transverse plate is arranged right above the top surface of the door frame folded plate, connecting plates are arranged on two end surfaces of the transverse plate, and the outer end of each connecting plate is fixedly connected with the top ends of the vertical plates on the corresponding side; the transverse plate is provided with a pressing mechanism, the bottom surface of each connecting plate is provided with a bending mechanism, and the bottom surface of each vertical plate is provided with a positioning component. The utility model provides a fixed not jail of door frame, the problem of easily taking place the dislocation skew, and simple structure is convenient for remove, has simplified operating procedure, has avoided bending many times the door frame, has further improved the quality and the efficiency that the door frame was bent.
Description
Technical Field
The utility model relates to a door frame technical field especially relates to pneumatic flanging machine of combination formula convenient to door frame uses.
Background
A door frame generally consists of two vertical side frames and an upper frame. Generally, an outer door frame and a convex door frame are provided, but the outer door frame and the convex door frame manufactured by the splicing process have some problems in the actual use process, wherein the bending quality of the door frame seriously influences the service life of the door frame.
The existing door frame bending equipment is complex in operation and inconvenient to move; when bending the door frame again, because the door frame is fixed insecure, often take place dislocation skew phenomenon, and then lead to the door frame to bend inefficiency, need bend to same position many times repeatedly.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a combined type pneumatic flanging machine convenient for the use of a door frame.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the combined pneumatic flanging machine convenient for the use of the door frame comprises a bottom plate, a supporting assembly, a pressing mechanism, a bending mechanism and a positioning assembly, wherein the bottom plate is in a horizontally and transversely placed rectangular plate shape, a fixing plate is arranged in the middle of the top surface of the bottom plate, a door frame folded plate is arranged on the top surface of the fixing plate, and the fixing plate is movably connected with the door frame folded plate through the supporting assembly; a pair of vertical plates are arranged at two ends of the top surface of the bottom plate, a transverse plate is arranged right above the top surface of the door frame folded plate, connecting plates are arranged on two end surfaces of the transverse plate, and the outer end of each connecting plate is fixedly connected with the top ends of the vertical plates on the corresponding side; install down pushing mechanism on the diaphragm, every the mechanism of bending is all installed to the connecting plate bottom surface, every locating component is all installed to the riser bottom surface.
Preferably, the supporting assembly comprises a reinforcing plate, a supporting spring, a supporting connecting rod and a supporting sucker, and a pair of reinforcing plates are arranged on the top surface of the bottom plate and positioned on the two sides of the fixing plate; the vertical sunken supporting groove that has in fixed plate top surface middle part, install supporting spring in the supporting groove, supporting spring top interpolation is equipped with the support connecting rod, the support connecting rod top is equipped with the support sucking disc, and supports the sucking disc and adsorb in door frame folded plate bottom surface middle part.
Preferably, the pressing mechanism comprises a pressing cylinder, a pressing plate and a pressing sucker, wherein a pressing through hole is vertically recessed in the middle of the top surface of the transverse plate, the pressing cylinder is installed in the pressing through hole, and the end part of a cylinder rod of the pressing cylinder is fixedly connected with the middle of the top surface of the pressing plate; the middle of the bottom surface of the lower pressing plate is provided with a pressing plate, and two ends of the bottom surface of the lower pressing plate are respectively provided with a pressing sucker.
Preferably, the bending mechanism comprises a bending cylinder, a bending wheel and a hinge rod, and the middle part of the bottom surface of the connecting plate is movably hinged with the bottom of the bending cylinder with the output end facing downwards; a hinged shaft cylinder is arranged at the end part of a cylinder rod of the bending cylinder, a hinged shaft is inserted in the hinged shaft cylinder, and bending wheels are respectively arranged at two ends of the hinged shaft; the bottom surface outer end of connecting plate and articulated rod top swing joint, articulated shaft section of thick bamboo outside middle part and articulated rod bottom swing joint.
Preferably, the positioning assembly comprises a positioning cylinder and a positioning clamp plate, a positioning through hole is transversely formed in the bottom of the vertical plate in a sunken mode, the positioning cylinder is installed in the positioning through hole, the positioning clamp plate is arranged at the end portion of a cylinder rod of the positioning cylinder, and the positioning clamp plate is located on the outer side of one end corresponding to the door frame folded plate.
Preferably, a pair of downward-pressing sliding holes are vertically formed in two ends of the top surface of the transverse plate in a recessed mode, downward-pressing sliding rods are inserted into the downward-pressing sliding holes, downward-pressing stop blocks are arranged at the top ends of the downward-pressing sliding rods, the bottom ends of the downward-pressing sliding rods are fixedly connected with one ends of the lower pressing plate corresponding to the top surface of the lower pressing plate, and downward-pressing springs are sleeved on the bottoms of the downward-pressing sliding rods.
Preferably, four corners of the bottom surface of the bottom plate are provided with roller supports, and the openings of the roller supports are connected with rollers in a rolling manner.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the support assembly is matched for use, so that the placing stability of the door frame folded plate is improved; the stability of the fixation of the door frame folded plate is further improved by the matching use of the pressing mechanism;
2. the bending mechanism is matched for use, so that the door frame folded plate can be conveniently bent and shaped at one time; the positioning assembly is matched for use, so that secondary bending forming of the door frame folded plate is facilitated;
to sum up, the utility model provides a fixed not jail of door frame, the problem of easily taking place the skew of dislocation, and simple structure is convenient for remove, has simplified operating procedure, has avoided bending many times the door frame, has further improved the quality and the efficiency that the door frame was bent.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limitation. In the drawings:
FIG. 1 is a front sectional view of the present invention;
FIG. 2 is a front sectional view of the pressing mechanism of the present invention;
FIG. 3 is a left side sectional view of the bending mechanism of the present invention;
fig. 4 is an enlarged view of a point a in fig. 1 according to the present invention;
number in the figure: the door frame folding device comprises a bottom plate 1, rollers 11, a fixing plate 12, a reinforcing plate 13, a door frame folding plate 14, a supporting spring 15, a supporting connecting rod 16, a supporting sucker 17, a vertical plate 2, a positioning air cylinder 21, a positioning clamping plate 22, a bending air cylinder 23, a hinged shaft cylinder 24, a hinged shaft 25, a bending wheel 26, a hinged rod 27, a transverse plate 3, a connecting plate 31, a pressing air cylinder 32, a pressing plate 33, a pressing slide rod 34, a pressing spring 35, a pressing plate 36 and a pressing sucker 37.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Example 1: in order to solve the problems that a door frame is not firmly fixed and easily misplaces and deviates, and further improve the quality and efficiency of bending the door frame, the embodiment provides a combined type pneumatic edge folding machine convenient for the use of the door frame, referring to fig. 1-4, comprising a bottom plate 1, a supporting assembly, a pressing mechanism, a bending mechanism and a positioning assembly, wherein the bottom plate 1 is in a horizontally and transversely placed rectangular plate shape, a fixing plate 12 is arranged in the middle of the top surface of the bottom plate 1, the fixing plate 12 is in a rectangular block shape, a door frame folded plate 14 horizontally and transversely placed is arranged on the top surface of the fixing plate 12, the door frame folded plate 14 is in a downward opening U-shaped frame shape, and the fixing plate 12 is movably connected with the door frame folded; a pair of vertical plates 2 which are vertically and symmetrically arranged are arranged at two ends of the top surface of the bottom plate 1, a transverse plate 3 which is transversely arranged is arranged right above the top surface of the door frame folded plate 14, connecting plates 31 which are transversely arranged are arranged on two end surfaces of the transverse plate 3, and the outer end of each connecting plate 31 is fixedly connected with the top end of the corresponding vertical plate 2; a pressing mechanism matched with the top surface of the doorframe folded plate 14 is installed on the transverse plate 3, a bending mechanism is installed on the bottom surface of each connecting plate 31, and a positioning assembly is installed on the bottom surface of each vertical plate 2; four corners of 1 bottom surface of bottom plate all sunken roller groove that has the circular form, all install the gyro wheel support of opening down in the roller groove, all through roller shaft and 11 roll connections of gyro wheel in the opening of gyro wheel support, the convenience of bulk movement has been increased in gyro wheel 11's use.
In the utility model, the supporting component comprises reinforcing plates 13, supporting springs 15, supporting connecting rods 16 and supporting suckers 17, a pair of symmetrical reinforcing plates 13 are arranged on the top surface of the bottom plate 1 and positioned on two sides of the fixed plate 12, and each reinforcing plate 13 is respectively positioned at the bending positions corresponding to two ends of the door frame folded plate 14; a supporting groove is vertically recessed in the middle of the top surface of the fixing plate 12, a supporting spring 15 which is vertically placed is installed in the supporting groove, a supporting connecting rod 16 is inserted into the top of the supporting spring 15, a supporting suction cup 17 is arranged at the top end of the supporting connecting rod 16, and the supporting suction cup 17 is adsorbed in the middle of the bottom surface of the door frame folded plate 14; the stability of the placement of the door frame flap 14 is increased by the cooperative use of the support assembly.
In the utility model, the pressing mechanism comprises a pressing cylinder 32, a pressing plate 33, a pressing plate 36 and a pressing sucker 37, the middle part of the top surface of the transverse plate 3 is vertically recessed with a pressing through hole, the pressing cylinder 32 with the output end facing downwards is installed in the pressing through hole, the type of the pressing cylinder 32 is PA-A20-500, the end part of the cylinder rod of the pressing cylinder 32 is provided with a pressing connecting block, and the bottom surface of the pressing connecting block is fixedly connected with the middle part of the top surface of the horizontally and transversely placed pressing plate 33; a pressing plate 36 is arranged in the middle of the bottom surface of the lower pressing plate 33, the bottom surface of the pressing plate 36 is in contact with the top surface of the door frame folded plate 14, lower pressing suction cups 37 with downward openings are respectively arranged at two ends of the bottom surface of the lower pressing plate 33, and each lower pressing suction cup 37 respectively adsorbs two ends of the top surface of the door frame folded plate 14; a pair of symmetrically penetrating lower pressing sliding holes are vertically recessed at two ends of the top surface of the transverse plate 3, a lower pressing sliding rod 34 in sliding connection is inserted in each lower pressing sliding hole, a lower pressing stop block is arranged at the top end of each lower pressing sliding rod 34, the bottom end of each lower pressing sliding rod 34 is fixedly connected with one end, corresponding to the top surface of the lower pressing plate 33, of each lower pressing sliding rod 34, and a lower pressing spring 35 is sleeved on the bottom of each lower pressing sliding rod 34; the stability of the fixing of the door frame flap 14 is further increased by the cooperation of the hold-down mechanism.
In the utility model, the bending mechanism comprises a bending cylinder 23, a bending wheel 26 and a hinge rod 27, a two-lug seat with a downward opening is arranged in the middle of the bottom surface of the connecting plate 31, the opening of the two-lug seat is movably hinged with the bottom of the bending cylinder 23 with a downward output end through a pin shaft, and the type of the bending cylinder 23 is DSNU-25-500-PPV-A; a bending connecting block is arranged at the end part of a cylinder rod of the bending cylinder 23, a hinged shaft barrel 24 is arranged at the bottom end of the bending connecting block, a hinged shaft 25 in rotary connection is inserted into the hinged shaft barrel 24, and two ends of the hinged shaft 25 are respectively provided with a bending wheel 26 in rolling connection; a first hinge seat with a downward opening is arranged at the outer end of the bottom surface of the connecting plate 31, the opening of the first hinge seat is movably hinged with the top end of the hinge rod 27 which is obliquely arranged through a pin shaft, a second hinge seat with an outward opening is arranged in the middle of the outer side of the hinge shaft barrel 24, and the opening of the second hinge seat is movably hinged with the bottom end of the hinge rod 27 through a pin shaft; through the cooperation of the bending mechanism, the door frame folded plate 14 can be conveniently bent and shaped at one time.
In the utility model, the positioning component comprises a positioning cylinder 21 and a positioning splint 22, the bottom of the vertical plate 2 is transversely recessed with a positioning through hole, the positioning cylinder 21 with an inward output end is arranged in the positioning through hole, the positioning cylinder 21 is of the type QGB63-25, the end part of the cylinder rod of the positioning cylinder 21 is provided with a positioning connecting block, the outer side surface of the positioning connecting block is provided with the positioning splint 22 fixedly connected, and the positioning splint 22 is positioned outside one end corresponding to the door frame folded plate 14; through the cooperation use of locating component, made things convenient for and carried out the shaping of bending twice to the door frame folded plate.
Example 2: the utility model discloses when specifically using, its operating procedure is as follows:
pushing a roller 11, moving a bottom plate 1 to a specified position, and respectively communicating a positioning cylinder 21, a bending cylinder 23 and a pressing cylinder 32 with an external air source through air pipes;
secondly, transversely placing the door frame folded plate 14 on the top surfaces of the two reinforcing plates 13, and enabling the supporting sucker 17 to be adsorbed on the bottom surface of the door frame folded plate 14 due to the self weight of the door frame folded plate 14, so as to drive the supporting connecting block 16 to compress the supporting spring 15 along the supporting groove;
step three, controlling the cylinder rod of the pressing cylinder 32 to stretch, driving the pressing plate 33 to descend through the pressing connecting block, further driving the pressing slide rod 34 to slide along the pressing slide hole, further driving the pressing spring 35 to extend, further driving the pressing plate 36 to be pressed on the top surface of the doorframe folded plate 14, and further driving the pressing suction cups 37 to respectively adsorb two ends of the top surface of the doorframe folded plate 14;
fourthly, controlling the expansion of a cylinder rod of the bending cylinder 23, and driving the bending wheels 26 to bend two ends of the door frame folded plate 14 under the matching of the hinging action of the hinging rod 27, wherein the length of the hinging rod 27 is fixed, so that when the hinging rod 27 rotates, the outer end of the hinging rod 27 drives the hinging shaft barrel 24 and the hinging shaft 25 to form a radian, and further drives the bending wheels 26 to roll at two ends of the door frame folded plate 14, thereby realizing the bending work;
and step five, when the two ends of the door frame folded plate 14 are bent to a certain degree, controlling the cylinder rod of the positioning cylinder 21 to stretch, driving the positioning clamping plates 22 to move inwards through the positioning connecting blocks, enabling the positioning clamping blocks 22 to be respectively clamped with the two ends of the door frame folded plate 14, further driving the two ends of the door frame folded plate 14 to perform bending work, and taking down the door frame folded plate 14 after the door frame folded plate 14 is bent.
The utility model provides a fixed not jail of door frame, the problem of easily taking place the dislocation skew, and simple structure is convenient for remove, has simplified operating procedure, has avoided bending many times the door frame, has further improved the quality and the efficiency that the door frame was bent.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (7)
1. Pneumatic flanging machine of combination formula convenient to door frame uses, including bottom plate (1), supporting component, push down the mechanism, bend the mechanism, locating component, its characterized in that: the bottom plate (1) is in a horizontally and transversely placed rectangular plate shape, a fixing plate (12) is arranged in the middle of the top surface of the bottom plate (1), a door frame folded plate (14) is arranged on the top surface of the fixing plate (12), and the fixing plate (12) is movably connected with the door frame folded plate (14) through a supporting assembly; a pair of vertical plates (2) are arranged at two ends of the top surface of the bottom plate (1), a transverse plate (3) is arranged right above the top surface of the door frame folded plate (14), connecting plates (31) are arranged on two end surfaces of the transverse plate (3), and the outer end of each connecting plate (31) is fixedly connected with the top end of the vertical plate (2) on the corresponding side; install down pushing down the mechanism on diaphragm (3), every the mechanism of bending is all installed to connecting plate (31) bottom surface, every locating component is all installed to riser (2) bottom surface.
2. The combined pneumatic hemming machine for door frames according to claim 1 wherein: the supporting assembly comprises a reinforcing plate (13), a supporting spring (15), a supporting connecting rod (16) and a supporting sucker (17), and a pair of reinforcing plates (13) are arranged on the top surface of the bottom plate (1) and positioned on the two sides of the fixing plate (12); the vertical sunken support recess that has in fixed plate (12) top surface middle part, install supporting spring (15) in the support recess, supporting spring (15) top interpolation is equipped with supporting connecting rod (16), supporting connecting rod (16) top is equipped with supporting suction cup (17), and supports suction cup (17) and adsorb in door frame folded plate (14) bottom surface middle part.
3. The combined pneumatic hemming machine for door frames according to claim 1 wherein: the pressing mechanism comprises a pressing cylinder (32), a pressing plate (33), a pressing plate (36) and a pressing sucker (37), a pressing through hole is vertically recessed in the middle of the top surface of the transverse plate (3), the pressing cylinder (32) is installed in the pressing through hole, and the end part of a cylinder rod of the pressing cylinder (32) is fixedly connected with the middle of the top surface of the pressing plate (33); the bottom surface middle part of holding down plate (33) is equipped with crimping board (36), holding down plate (33)'s bottom surface both ends are installed respectively and are pushed down sucking disc (37).
4. The combined pneumatic hemming machine for door frames according to claim 1 wherein: the bending mechanism comprises a bending cylinder (23), a bending wheel (26) and a hinge rod (27), and the middle of the bottom surface of the connecting plate (31) is movably hinged with the bottom of the bending cylinder (23) with the output end facing downwards; a hinged shaft barrel (24) is arranged at the end part of a cylinder rod of the bending cylinder (23), a hinged shaft (25) is inserted into the hinged shaft barrel (24), and bending wheels (26) are respectively arranged at two ends of the hinged shaft (25); the bottom surface outer end of connecting plate (31) and articulated rod (27) top swing joint, articulated shaft section of thick bamboo (24) outside middle part and articulated rod (27) bottom swing joint.
5. The combined pneumatic hemming machine for door frames according to claim 1 wherein: the positioning assembly comprises a positioning cylinder (21) and a positioning clamping plate (22), a positioning through hole is transversely formed in the bottom of the vertical plate (2) in a sunken mode, the positioning cylinder (21) is installed in the positioning through hole, the positioning clamping plate (22) is arranged at the end part of a cylinder rod of the positioning cylinder (21), and the positioning clamping plate (22) is located on the outer side of one end corresponding to the door frame folded plate (14).
6. The combined pneumatic hemming machine for door frames according to claim 3 wherein: the vertical sunken a pair of draw-down apertures that have in top surface both ends of diaphragm (3), every it has push down slide bar (34) all to insert in the draw-down aperture, every push down slide bar (34) top all is equipped with down the dog, every push down slide bar (34) bottom respectively with the one end rigid coupling that the top surface of holding down plate (33) corresponds, and every push down slide bar (34) bottom all overlaps and is equipped with down pressure spring (35).
7. The combined pneumatic hemming machine for door frames according to claim 1 wherein: the four corners of the bottom surface of the bottom plate (1) are provided with roller wheel supports, and the openings of the roller wheel supports are connected with the roller wheels (11) in a rolling manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021210554.1U CN212945114U (en) | 2020-06-28 | 2020-06-28 | Combined pneumatic edge folding machine convenient for door frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021210554.1U CN212945114U (en) | 2020-06-28 | 2020-06-28 | Combined pneumatic edge folding machine convenient for door frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212945114U true CN212945114U (en) | 2021-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021210554.1U Expired - Fee Related CN212945114U (en) | 2020-06-28 | 2020-06-28 | Combined pneumatic edge folding machine convenient for door frame |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212945114U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113245409A (en) * | 2021-06-04 | 2021-08-13 | 武汉市绍阳科技有限公司 | Door and window hardware fitting aluminium alloy door handle manufacturing and processing machinery |
| CN113579013A (en) * | 2021-07-07 | 2021-11-02 | 安徽省伊锡尔重工科技有限公司 | Continuous bending machine for right-angle bending of metal plate |
| CN113771343A (en) * | 2021-09-10 | 2021-12-10 | 深圳市新创佳光电科技有限公司 | Screen body bending equipment for intelligently manufacturing mobile phone liquid crystal display screen |
| CN114226516A (en) * | 2022-02-08 | 2022-03-25 | 杭州泰尚智能装备有限公司 | Full-automatic bending equipment and bending method for U-shaped sheet metal plate |
-
2020
- 2020-06-28 CN CN202021210554.1U patent/CN212945114U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113245409A (en) * | 2021-06-04 | 2021-08-13 | 武汉市绍阳科技有限公司 | Door and window hardware fitting aluminium alloy door handle manufacturing and processing machinery |
| CN113579013A (en) * | 2021-07-07 | 2021-11-02 | 安徽省伊锡尔重工科技有限公司 | Continuous bending machine for right-angle bending of metal plate |
| CN113771343A (en) * | 2021-09-10 | 2021-12-10 | 深圳市新创佳光电科技有限公司 | Screen body bending equipment for intelligently manufacturing mobile phone liquid crystal display screen |
| CN114226516A (en) * | 2022-02-08 | 2022-03-25 | 杭州泰尚智能装备有限公司 | Full-automatic bending equipment and bending method for U-shaped sheet metal plate |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210413 |