CN112238163A - Hydraulic press for correcting plate bending and twisting - Google Patents
Hydraulic press for correcting plate bending and twisting Download PDFInfo
- Publication number
- CN112238163A CN112238163A CN202010847610.0A CN202010847610A CN112238163A CN 112238163 A CN112238163 A CN 112238163A CN 202010847610 A CN202010847610 A CN 202010847610A CN 112238163 A CN112238163 A CN 112238163A
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- China
- Prior art keywords
- bending
- oil cylinder
- hydraulic press
- sides
- carrier roller
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Classifications
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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
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/10—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts between rams and anvils or abutments
-
- 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
-
- 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
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/02—Advancing work in relation to the stroke of the die or tool
- B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
- B21D43/08—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention relates to a hydraulic press for correcting bending and twisting of a plate, which comprises a press body, wherein the press body is arranged on a press body, a section to be corrected is arranged on the press body, a supporting device arranged on the press body, supporting seats arranged on two sides of the supporting device and a carrier roller device arranged on the outer sides of the two supporting seats are arranged below the section to be corrected, a first bending oil cylinder and a second bending oil cylinder are respectively arranged on two sides of the section to be corrected, the first bending oil cylinder is connected with a first bending die, the second bending oil cylinder is connected with a second bending die, third bending dies are respectively arranged on two sides of the first bending oil cylinder, fourth bending dies are respectively arranged on two sides of the second bending oil cylinder, and a plurality of pressing heads are arranged above. The invention has the beneficial effects that: the method can realize the correction of the distortion defect of the bent section bar and the correction of the forming curvature (too large or too small) of the bent section bar on one device, and can finish the correction of two curvature defects without turning over the bent section bar; the correction efficiency is high, the process is simple, and the correction effect is good.
Description
(I) technical field
The invention belongs to the technical field of hydraulic equipment, and particularly relates to a hydraulic press for correcting bending and twisting of a plate.
(II) background of the invention
When the sectional material bending equipment is used for bending and forming sectional materials, the forming defects of bending sectional materials, overlarge forming curvature or undersize forming curvature and the like often exist, the twisting defect is more obvious when the sectional materials with asymmetric cross sections are bent and formed, and the forming curvature is more difficult to control. In a conventional actual production, a vertical hydraulic press is often used to correct a distortion defect of a curved profile, a horizontal hydraulic press is often used to correct a forming curvature of the curved profile, and when a local forming curvature of one curved profile is too large or too small, the curved profile needs to be turned over and the curvature correction is repeatedly performed by the horizontal hydraulic press. When the traditional vertical oil press or horizontal oil press is used for correcting the distortion defect and the forming curvature defect of the bent section, the correction efficiency is low, the correction process is complex, and the correction effect is poor.
Disclosure of the invention
In order to make up for the defects of the prior art, the invention provides the hydraulic press for correcting the plate bending torsion, which can simultaneously correct the torsion defect and the forming curvature defect of the bent section, and has the advantages of high efficiency, simple process and good effect.
The invention is realized by the following technical scheme:
the utility model provides a hydraulic press is corrected in panel kink, includes the organism, and the organism is installed on the lathe bed, characterized by: the machine tool is characterized in that a section to be corrected is arranged on the machine tool body, a supporting device arranged on the machine tool body, supporting seats arranged on two sides of the supporting device and a carrier roller device arranged on the outer sides of the two supporting seats are arranged below the section to be corrected, a first ejection bending oil cylinder and a second ejection bending oil cylinder are arranged on two sides of the section to be corrected respectively, the first ejection bending oil cylinder is connected with a first ejection bending die, the second ejection bending oil cylinder is connected with a second ejection bending die, a third ejection bending die is arranged on two sides of the first ejection bending oil cylinder respectively, fourth ejection bending dies are arranged on two sides of the second ejection bending oil cylinder respectively, and a plurality of.
The third top bending die is installed on the first linear guide rail, and the fourth top bending die is installed on the second linear guide rail.
The pressure head is arranged on the lower surface of the sliding seat, the upper surface of the sliding seat is connected with the pressing oil cylinder, the pressing oil cylinder is arranged on the upper beam, the upper beam is fixed on the upper part of the pull rod, and the pull rod is fixed on the lathe bed.
The sliding seat is installed on the pull rod through a sliding sleeve.
The bottom surface of the sliding seat is provided with a T-shaped groove, and the pressure head is arranged on the lower surface of the sliding seat through the T-shaped groove.
The supporting device comprises a lower die base, the bottom surface of the lower die base is connected with a supporting oil cylinder, and the supporting oil cylinder is fixed on the machine body.
And guide rods are respectively arranged on two sides of the bottom surface of the lower die base and penetrate into first guide holes in the lathe bed.
The supporting seat is installed in a guide groove in the lathe bed and can move along the guide groove.
The carrier roller device comprises a carrier roller oil cylinder, the fixed end of the carrier roller oil cylinder is fixed on the bed body, the output end of the carrier roller oil cylinder is connected with a carrier roller seat, and a carrier roller is installed on the carrier roller seat.
And guide rods are respectively arranged on two sides of the bottom surface of the carrier roller seat and penetrate into second guide holes of the machine body.
The machine body feeding side is provided with a feeding roller way, and the machine body discharging side is provided with a discharging roller way.
The invention has the beneficial effects that: the method can correct the distortion defect of the bent profile and the forming curvature of the bent profile on one device, and can correct the defects of two curvatures without turning the bent profile when the local forming curvature of one bent profile is small or large; the correction efficiency is high, the process is simple, and the correction effect is good.
(IV) description of the drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a side view of the body of the present invention;
FIG. 4 is a schematic top view of the machine body of the present invention;
FIG. 5 is a schematic front view of the body of the present invention;
FIG. 6 is a schematic structural view of the supporting device of the present invention;
FIG. 7 is a schematic view of a carrier roller apparatus according to the present invention;
in the figure, 1 machine body, 2 machine bodies, 3 to-be-corrected section bars, 4 supporting devices, 5 supporting seats, 6 carrier roller devices, 7 first bending oil cylinders, 8 second bending oil cylinders, 9 first bending dies, 10 second bending dies, 11 third bending dies, 12 fourth bending dies, 13 pressing heads, 14 first linear guide rails, 15 second linear guide rails, 16 sliding seats, 17 pressing oil cylinders, 18 upper beams, 19 pull rods, 20 sliding sleeves, 21T-shaped grooves, 22 lower die seats, 23 supporting oil cylinders, 24 guide rods, 25 first guide holes, 26 guide grooves, 27 carrier roller oil cylinders, 28 carrier roller seats, 29 carrier rollers, 30 guide rods, 31 second guide holes, 32 feeding roller tables and 33 discharging roller tables.
(V) detailed description of the preferred embodiments
The attached drawing is an embodiment of the invention. The embodiment comprises a machine body 1, wherein the machine body 1 is installed on a machine body 2, a section bar 3 to be corrected is arranged on the machine body 2, a supporting device 4 arranged on the machine body 2, supporting seats 5 arranged on two sides of the supporting device 4 and a carrier roller device 6 arranged on the outer sides of the two supporting seats 5 are arranged below the section bar 3 to be corrected, a first bending oil cylinder 7 and a second bending oil cylinder 8 are respectively arranged on two sides of the section bar 3 to be corrected, the first bending oil cylinder 7 is connected with a first bending die 9, the second bending oil cylinder 8 is connected with a second bending die 10, third bending dies 11 are respectively arranged on two sides of the first bending oil cylinder 7, fourth bending dies 12 are respectively arranged on two sides of the second bending oil cylinder 8, and a plurality of pressing heads 13 are arranged above the section bar 3 to. The third top-bending die 11 is mounted on the first linear guide rail 14, and the fourth top-bending die 12 is mounted on the second linear guide rail 15. The pressure head 13 is arranged on the lower surface of the sliding seat 16, the upper surface of the sliding seat 16 is connected with the pressing oil cylinder 17, the pressing oil cylinder 17 is arranged on the upper beam 18, the upper beam 18 is fixed on the upper part of the pull rod 19, and the pull rod 19 is fixed on the machine body 2. The sliding seat 16 is mounted on the pull rod 19 through a sliding sleeve 20. The bottom surface of the sliding seat 16 is provided with a T-shaped groove 21, and the pressure head 13 is arranged on the lower surface of the sliding seat 16 through the T-shaped groove 21. The supporting device 4 comprises a lower die base 22, the bottom surface of the lower die base 22 is connected with a supporting oil cylinder 23, and the supporting oil cylinder 23 is fixed on the machine body 2. Two sides of the bottom surface of the lower die base 22 are respectively provided with a guide rod 24, and the guide rods 24 penetrate into a first guide hole 25 on the lathe bed 2. The support base 5 is mounted in a guide groove 26 on the bed 2 and is movable along the guide groove 26. The carrier roller device 6 comprises a carrier roller oil cylinder 27, the fixed end of the carrier roller oil cylinder 27 is fixed on the lathe bed 2, the output end of the carrier roller oil cylinder 27 is connected with a carrier roller seat 28, and a carrier roller 29 is arranged on the carrier roller seat 28. Guide rods 30 are respectively arranged on two sides of the bottom surface of the roller seat 28, and the guide rods 30 penetrate into second guide holes 31 of the lathe bed 2. The feeding side of the machine body 1 is provided with a feeding roller way 32, and the discharging side of the machine body 1 is provided with a discharging roller way 33.
By adopting the hydraulic press for correcting the bending torsion of the plate, the first bending oil cylinder 7 is horizontally fixed in the mounting groove at one side of the middle position of the lathe bed 2, and the piston rod of the first bending oil cylinder faces to the center line of the machine line; the first bending die 9 is fixed at the head of the piston rod of the first bending oil cylinder 7, and a guide device is arranged on the first bending die 9 to prevent the first bending die from rotating. The third bending dies 11 are distributed on two sides of the first bending oil cylinder 7, are the same as the first bending dies 9 in installation height, are fixed on the vertical surface of the lathe bed 2 through first linear guide rails 14 horizontally arranged along the feeding and discharging direction, and can move along the first linear guide rails 14. The second bending oil cylinder 8 is horizontally fixed in the mounting groove on the other side of the middle position of the lathe bed 2 and is symmetrically arranged with the first bending oil cylinder 7, and a piston rod of the second bending oil cylinder faces to the center line of the machine line. The second bending die 10 is arranged at the head of a piston rod of the second bending oil cylinder 8, and a guide device is arranged on the second bending die 10 to prevent the second bending die from rotating. The fourth top bending dies 12 are distributed on two sides of the second top bending oil cylinder 8, are the same as the first top bending dies 9 in installation height, are fixed on the vertical face of the lathe bed 2 through second linear guide rails 15 horizontally arranged along the feeding and discharging direction, and can horizontally move along the second linear guide rails 15. The supporting device 4 is vertically arranged at the middle position of the center line of the train close to the lathe bed 2, and the installation position avoids the telescopic range space of the first bending oil cylinder 7 and the second bending oil cylinder 8.
The section bar 3 to be corrected takes a bent F-shaped rail as an example, the first top bending die 9 and the third top bending die 11 have the same shape, and the shape of the first top bending die is matched with the shape of one side surface of the bent F-shaped rail to be corrected; the second top bending die 10 and the fourth top bending die 12 are the same in shape, and the shape of the second top bending die is matched with that of the other side face of the bent F-shaped rail needing bending correction. When curvature correction is carried out on a bent F-shaped rail, the first top bending die 9 and the two fourth top bending dies 12 are matched for use, curvature correction in one direction of the bent F-shaped rail is achieved, the first top bending die 9 is installed on the first top bending oil cylinder 7 and stretches out and draws back along a piston rod of the first top bending oil cylinder 7, correction force is applied to the bent F-shaped rail needing to be corrected, and the two fourth top bending dies 12 can move along the second linear guide rail 15 fixed on the lathe bed 2 to adjust the supporting position so as to adapt to the requirements of different bent F-shaped rail shapes and different curvature correction. The second top bending die 10 and the two third top bending dies 11 are matched for use, curvature correction in the other direction of the bent F-shaped rail is achieved, the second top bending die 10 is installed on the second top bending oil cylinder 8 and stretches out and draws back along a piston rod of the second top bending oil cylinder 8, correction force is applied to the bent F-shaped rail needing to be corrected, and the two third top bending dies 11 can move along the first linear guide rail 14 fixed on the lathe bed 2 to adjust the supporting position so as to adapt to the requirements of correction of different bent F-shaped rail shapes and different curvatures.
As shown in fig. 4, the center of the curved F-shaped rail is on the left side, and when the curvature is too small, E, F points are used as supports to apply a corrective force to the point a to increase the curvature of the curved F-shaped rail; when the curvature is too large, C, D points are used as supports to apply corrective force to B point to reduce the curvature of the curved F-shaped rail. Through the matching use of the first top bending die 9, the fourth top bending die 12, the second top bending die 10 and the third top bending die 11, the defects of overlarge curvature or undersize curvature of the bent F-shaped rail can be corrected under the condition that the bent F-shaped rail is not overturned.
The support device 4, the two support seats 5 and the two carrier roller devices 6 are arranged on the bed 2 along the central line of the equipment train and are matched with a plurality of pressing heads 13 arranged on a sliding seat 16 for use, so that the distortion defect of the bent F-shaped rail is corrected.
The support oil cylinder 23 is fixed on the bed body 2, and a piston rod extends upwards; the bottom surface of the lower die seat 22 is connected with a piston rod of a support oil cylinder 23 and ascends and descends along with the piston rod; two guide rods 24 are distributed on two sides of the support cylinder 23 and penetrate through a first guide hole 25 on the machine body 2 to be connected with the bottom surface of the lower die base 22, so that the lower die base 22 is prevented from rotating. The shape of the upper surface of the lower die base 22 is matched with the shape of the lower surface of the bent F-shaped rail.
The supporting seats 5 are horizontally arranged on two sides of the supporting device 4, are arranged in a guide groove 26 on the horizontal plane of the bed body 2, and can move along the feeding and discharging direction. When the distortion defect of the bent section bar is corrected, the position of the supporting seat 5 is moved according to the correction requirement of the section bar. The shape of the upper surface of the supporting seat 5 is matched with the shape of the lower surface of the bent F-shaped rail.
The carrier roller devices 6 are arranged on two sides of the supporting seat 5 along the center line of the machine line and are vertically arranged on the machine body 2. The carrier roller oil cylinder 27 is arranged on the lathe bed 2, the piston rod extends upwards, and the bottom surface of the carrier roller seat 28 is connected with the head of the piston rod and ascends and descends along with the piston rod; two guide rods 30 are distributed on two sides of the carrier roller oil cylinder 27 and penetrate through a second guide hole 31 in the machine body 2 to be connected with the bottom surface of the carrier roller seat 28 to prevent the carrier roller seat 28 from rotating, the carrier roller 29 is installed on the carrier roller seat 28 through a shaft sleeve, and the carrier roller 29 can rotate along the axis of the carrier roller 29. By adjusting the height of the carrier roller 29, the auxiliary equipment performs the bending F-shaped rail twist correction.
The four pull rods 19 are fixed on the lathe bed 2 through locking nuts; the upper beam 18 is fixed to the upper portion of the tie rod 19 by a lock nut. The hold-down cylinder 17 is arranged in the centre of the upper beam 18 with the piston rod extending downwards. The sliding seat 16 is arranged on the pull rod 19 through a sliding sleeve 20 and is arranged between the upper beam 18 and the lathe bed 2, the upper surface of the sliding seat 16 is connected with a piston rod of a pressing-down oil cylinder 17, the pressing-down oil cylinder 17 controls the sliding seat 16 to lift, and a T-shaped groove 21 vertical to the feeding direction is processed on the lower surface of the sliding seat 16. The pressure head 13 is installed on the lower surface of the sliding seat 16 along the center line of the machine column through the T-shaped groove 21 and can move along the T-shaped groove 21, and the number and the position of the pressure head 13 can be adjusted according to the actual distortion correction requirement.
Claims (11)
1. The utility model provides a hydraulic press is corrected in panel kink, includes organism (1), and organism (1) is installed on lathe bed (2), characterized by: the correcting device is characterized in that a section bar (3) to be corrected is arranged on the lathe bed (2), a supporting device (4) arranged on the lathe bed (2), supporting seats (5) arranged on two sides of the supporting device (4) and a carrier roller device (6) arranged on the outer sides of the two supporting seats (5) are arranged below the section bar (3) to be corrected, a first bending oil cylinder (7) and a second bending oil cylinder (8) are respectively arranged on two sides of the section bar (3) to be corrected, the first bending oil cylinder (7) is connected with a first bending die (9), the second bending oil cylinder (8) is connected with a second bending die (10), a third bending die (11) is respectively arranged on two sides of the first bending oil cylinder (7), a fourth bending die (12) is respectively arranged on two sides of the second bending oil cylinder (8), and a plurality of pressure heads (13) are arranged above the section bar.
2. The hydraulic press for correcting plate bending torsion according to claim 1, wherein: the third top bending die (11) is arranged on the first linear guide rail (14), and the fourth top bending die (12) is arranged on the second linear guide rail (15).
3. The hydraulic press for correcting plate bending torsion according to claim 1, wherein: the press head (13) is arranged on the lower surface of the sliding seat (16), the upper surface of the sliding seat (16) is connected with the pressing oil cylinder (17), the pressing oil cylinder (17) is arranged on the upper beam (18), the upper beam (18) is fixed on the upper part of the pull rod (19), and the pull rod (19) is fixed on the lathe bed (2).
4. The hydraulic press for correcting plate bending torsion according to claim 3, wherein: the sliding seat (16) is arranged on the pull rod (19) through a sliding sleeve (20).
5. The hydraulic press for correcting plate bending torsion according to claim 3, wherein: the bottom surface of the sliding seat (16) is provided with a T-shaped groove (21), and the pressure head (13) is arranged on the lower surface of the sliding seat (16) through the T-shaped groove (21).
6. The hydraulic press for correcting plate bending torsion according to claim 1, wherein: the supporting device (4) comprises a lower die base (22), the bottom surface of the lower die base (22) is connected with a supporting oil cylinder (23), and the supporting oil cylinder (23) is fixed on the lathe bed (2).
7. The hydraulic press for correcting plate bending torsion according to claim 6, wherein: and guide rods (24) are respectively arranged on two sides of the bottom surface of the lower die seat (22), and the guide rods (24) penetrate into first guide holes (25) in the lathe bed (2).
8. The hydraulic press for correcting plate bending torsion according to claim 1, wherein: the supporting seat (5) is installed in a guide groove (26) on the lathe bed (2) and can move along the guide groove (26).
9. The hydraulic press for correcting plate bending torsion according to claim 1, wherein: the carrier roller device (6) comprises a carrier roller oil cylinder (27), the fixed end of the carrier roller oil cylinder (27) is fixed on the lathe bed (2), the output end of the carrier roller oil cylinder (27) is connected with a carrier roller seat (28), and a carrier roller (29) is installed on the carrier roller seat (28).
10. The hydraulic press for correcting plate bending torsion according to claim 9, wherein: guide rods (30) are respectively installed on two sides of the bottom surface of the roller seat (28), and the guide rods (30) penetrate into second guide holes (31) of the lathe bed (2).
11. The hydraulic press for correcting plate bending torsion according to claim 5, wherein: a feeding roller way (32) is arranged on the feeding side of the machine body (1), and a discharging roller way (33) is arranged on the discharging side of the machine body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010847610.0A CN112238163A (en) | 2020-08-21 | 2020-08-21 | Hydraulic press for correcting plate bending and twisting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010847610.0A CN112238163A (en) | 2020-08-21 | 2020-08-21 | Hydraulic press for correcting plate bending and twisting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112238163A true CN112238163A (en) | 2021-01-19 |
Family
ID=74170498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010847610.0A Pending CN112238163A (en) | 2020-08-21 | 2020-08-21 | Hydraulic press for correcting plate bending and twisting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112238163A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU804073A1 (en) * | 1979-04-19 | 1981-02-15 | Предприятие П/Я В-8852 | Hydraulic straightening press |
| DE3927465A1 (en) * | 1989-08-19 | 1991-02-21 | Mae Maschinen U Apparatebau Go | BREADING MACHINE FOR LONG-EXTENDED ALIGNMENT |
| JP2012250256A (en) * | 2011-06-02 | 2012-12-20 | Sumitomo Metal Ind Ltd | Method and device for manufacturing rolled shape steel including two flanges |
| JP2014018827A (en) * | 2012-07-18 | 2014-02-03 | Shinto Kensetsu Kogyo Co Ltd | Straightening press apparatus |
| CN204769997U (en) * | 2015-05-19 | 2015-11-18 | 河南金马恒泰人防设备有限公司 | Strip weld workpiece hydraulic pressure straightening machine |
| JP2018012112A (en) * | 2016-07-19 | 2018-01-25 | 日本管材センター株式会社 | Bending corrector |
| CN208245499U (en) * | 2018-05-29 | 2018-12-18 | 中国铁建重工集团有限公司 | A kind of strong top tooling of F fashioned iron rail member |
| CN210475064U (en) * | 2019-05-29 | 2020-05-08 | 湖州高精电梯导轨科技有限公司 | Quick straightening device for elevator guide rail |
-
2020
- 2020-08-21 CN CN202010847610.0A patent/CN112238163A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU804073A1 (en) * | 1979-04-19 | 1981-02-15 | Предприятие П/Я В-8852 | Hydraulic straightening press |
| DE3927465A1 (en) * | 1989-08-19 | 1991-02-21 | Mae Maschinen U Apparatebau Go | BREADING MACHINE FOR LONG-EXTENDED ALIGNMENT |
| JP2012250256A (en) * | 2011-06-02 | 2012-12-20 | Sumitomo Metal Ind Ltd | Method and device for manufacturing rolled shape steel including two flanges |
| JP2014018827A (en) * | 2012-07-18 | 2014-02-03 | Shinto Kensetsu Kogyo Co Ltd | Straightening press apparatus |
| CN204769997U (en) * | 2015-05-19 | 2015-11-18 | 河南金马恒泰人防设备有限公司 | Strip weld workpiece hydraulic pressure straightening machine |
| JP2018012112A (en) * | 2016-07-19 | 2018-01-25 | 日本管材センター株式会社 | Bending corrector |
| CN208245499U (en) * | 2018-05-29 | 2018-12-18 | 中国铁建重工集团有限公司 | A kind of strong top tooling of F fashioned iron rail member |
| CN210475064U (en) * | 2019-05-29 | 2020-05-08 | 湖州高精电梯导轨科技有限公司 | Quick straightening device for elevator guide rail |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210119 |