CN115464006A - Section bar straightening method - Google Patents
Section bar straightening method Download PDFInfo
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- CN115464006A CN115464006A CN202210865249.3A CN202210865249A CN115464006A CN 115464006 A CN115464006 A CN 115464006A CN 202210865249 A CN202210865249 A CN 202210865249A CN 115464006 A CN115464006 A CN 115464006A
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- upper die
- arc
- lower support
- straightening
- base
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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
Abstract
The invention relates to a method for straightening a section, which comprises the following steps: the method comprises the steps of installing an upper die and a lower support, wherein the size and the shape of the upper die correspond to those of a straightening stress surface of a section bar; placing the bent section on the two lower supports, and adjusting the distance between the two lower supports; thirdly, starting the straightening device, and gradually moving the arched surface pressed by the upper die downwards until the straightness is qualified; and fourthly, moving the upper die upwards to be separated from the profile, and straightening the next section of the profile. The section straightening device comprises a base, a rack, a top cover, a hydraulic jack and an upper die holder. The device is equipped with mould and arc under bracing on the arc, and mould and upper die base are connected on the arc, and the arc under bracing is installed at the base. The lower surface of the arc upper die is provided with a straight surface upper die, and the upper surface of the arc lower support is provided with a straight surface lower support. The upper die and the lower support are matched for use, the bent section is straightened, the problems of collision, indentation and scratching are avoided, the product precision and the appearance quality are improved, and the die has the advantages of easiness in replacement and flexibility in operation.
Description
Technical Field
The invention belongs to the technical field of industrial processing of profiled bars, and relates to a profile straightening method.
Background
Profiles often suffer from various shape defects such as bending, waviness, twisting, etc. during hot extrusion, hot rolling, cold rolling and cold drawing processes or during cooling and transportation. The defects of bending and the like can be eliminated under the action of external force through various straightening processes, so that the product reaches a qualified state.
The steel pipe needs to be straightened after the heat treatment is finished so as to meet the requirement on the flexibility of the steel pipe, and at present, the steel pipe is easily scratched and large residual stress is generated in a workshop for straightening, so that the appearance quality of the steel pipe is influenced.
The section steel is an economical and efficient section steel with optimized sectional area distribution and reasonable strength-weight ratio, all parts are arranged in a right angle, and the section steel has the characteristics of high structural strength, light weight and cost saving, and is widely used as a structural member. The problem that the steel section is rapidly and efficiently manufactured to improve the production efficiency of a steel structure manufacturer must be solved.
The profile steel has the problems of bending and twisting after the forming is finished, and needs to be straightened on a rotary stretcher so as to meet the requirements of the integral bending degree and twisting degree of the profile steel. However, the local curvature is difficult to correct, and the dimensional accuracy and the appearance quality are affected.
Disclosure of Invention
The invention aims to provide a profile straightening method, which is used for straightening a bent profile by matching an upper die and a lower support, avoids the problems of collision, indentation and scratch and improves the dimensional precision and the appearance quality of the treated profile.
The technical scheme of the invention is as follows: the method for straightening the section bars utilizes a section bar straightening device to straighten the section bars, and the straightening steps are as follows:
the method comprises the steps of mounting an arc upper die, a straight surface upper die, an arc lower support and a straight surface lower support, wherein the size and the shape of the arc upper die correspond to the straightening stress surface of a section bar;
placing the bent section on two lower supports (an arc lower support and a flat lower support), measuring bending data, enabling the arched surface to face upwards, and adjusting the two lower supports to a proper distance according to the bending degree;
thirdly, starting the straightening device, driving the upper die to press the arched surface to gradually move downwards by a hydraulic jack, and stopping pressing until the straightness is qualified under the mutual matching of the upper die and the lower support;
and the upper die (the arc upper die and the flat upper die) gradually moves upwards to separate from the section bar, and then the bending area of the next section of section bar is straightened.
The arc upper die and the arc lower support are matched for use, the straight surface upper die and the straight surface lower support are matched for use, and the shape of the working surface is consistent with that of the stress surface of the straightening profile.
The section straightening device comprises a base, a rack, a top cover, a hydraulic jack and an upper die holder. The top cover is positioned on the upper portion of the rack, the base is positioned on the lower portion of the rack, the hydraulic jack is fixed below the top cover through a fastening bolt, and the upper portion of the upper die base is connected with a jacking disc of the hydraulic jack. The device is equipped with mould and arc under bracing on the arc, and mould and upper die base are connected on the arc, and the arc under bracing is installed on the base, and mould and arc under bracing correspond the setting on the arc. The lower side of the arc upper die is provided with a straight upper die, the upper side of the arc lower support is provided with a straight lower support, and the straight upper die and the straight lower support are correspondingly arranged. The protective layer is arranged in the working surface of the upper die and the lower support of the straight surface and is arranged on the inner wall of the working surface through bolts.
The protective layer is made of rubber, industrial plastics or PVC. The upper die base is connected with the top disc of the hydraulic jack in a welding mode. An inverted isosceles trapezoid clamping groove is formed in the lower portion of the upper die base, an inverted isosceles trapezoid clamping block corresponding to the inverted isosceles trapezoid clamping groove of the upper die base is arranged on the upper portion of the arc-shaped upper die, and the arc-shaped upper die is fixed to the lower portion of the upper die base through the inverted isosceles trapezoid clamping groove. The arc lower support is placed on the platform of the base, and the straight surface lower support is placed on the arc lower support.
The method for straightening the profile straightens the bent profile by utilizing the straightening device through the matching use of the upper die and the two lower supports, avoids the problems of collision, indentation and scratching, and improves the dimensional precision and the appearance quality of a product. The invention overcomes the problems of low efficiency and high labor intensity in the traditional manual processing, and has the advantages of high dimensional precision of the processed section, good appearance quality, easy replacement of the die and flexible operation.
Drawings
FIG. 1 is a schematic structural view of a section straightener;
FIG. 2 is a schematic cross-sectional elevational view of the FIG. 1 assembly;
wherein: 1-base, 2-top cover, 3-hydraulic jack, 4-fastening bolt, 5-upper die base, 6-frame, 61-arc upper die, 62-arc lower support, 71-straight upper die, 72-straight lower support, 8-protective layer, 9-inverted isosceles trapezoid clamping block, 10-top disc
Detailed Description
The present invention will be described in detail with reference to the following examples and drawings. The scope of the invention is not limited to the embodiments, and any modifications made by those skilled in the art within the scope defined by the claims are also within the scope of the invention.
The straightening device of the section bar is shown in figures 1 and 2 and comprises a base 1, a frame 6, a top cover 2, a hydraulic jack 3 and an upper die base 5. The top cover is positioned at the upper part of the frame 6, and the base is positioned at the lower part of the frame 6. The hydraulic jack is fixed below the top cover through 6 groups of fastening bolts 4. The upper part of the upper die base is connected with a top disc 10 of a hydraulic jack in a welding mode. The device is equipped with mould 61 and arc under bracing 62 on the arc, and mould and upper die base are connected on the arc, and the arc under bracing is installed on the base, and mould and arc under bracing correspond the setting on the arc. An inverted isosceles trapezoid clamping groove is formed in the lower portion of the upper die base, an inverted isosceles trapezoid clamping block 9 corresponding to the inverted isosceles trapezoid clamping groove of the upper die base is arranged on the upper portion of the arc-shaped upper die, and the arc-shaped upper die is fixed to the lower portion of the upper die base 5 through the inverted isosceles trapezoid clamping groove. The lower surface of the arc upper die is provided with a straight surface upper die 71, the upper surface of the arc lower support is provided with a straight surface lower support 72, and the straight surface upper die 71 and the straight surface lower support 72 are correspondingly arranged. The curved lower support 62 is placed on the platform of the susceptor 1 and the flat planar lower support 72 is placed on the curved lower support. The working surfaces of the upper die on the straight surface and the lower support on the straight surface are internally provided with a protective layer 8 which is made of rubber. The protective layer is arranged on the inner wall of the working face through bolts.
When the straightening machine works, one upper die and two lower supports (the arc-shaped lower support 62 and the flat-surface lower support 72) are matched with each other to straighten, and the distance between the two lower supports is adjusted according to the bending condition of the profile. The arc upper die 61 and the arc lower support 62 are used in a matched mode, the straight surface upper die 71 and the straight surface lower support 72 are used in a matched mode, and the shape of the working surface is consistent with that of the stress surface of the straightening profile. The invention relates to a method for straightening a section, which comprises the following steps:
the method comprises the steps of installing an arc-shaped upper die 61, a straight surface upper die 71, an arc-shaped lower support 62 and a straight surface lower support 72, wherein the size and the shape of the arc-shaped upper die correspond to the straightening stress surface of the section;
placing the bent section on two lower supports (an arc lower support 62 and a flat lower support 72), measuring bending data, enabling the arched surface to face upwards, and adjusting the two lower supports to a proper distance according to the bending degree;
the straightening device is started, the hydraulic jack 3 pushes the upper die to press the arched surface to gradually move downwards, and the pressing is stopped until the straightness is qualified under the mutual cooperation of the upper die and the lower support;
and the upper die (the arc upper die and the flat upper die) gradually moves upwards to separate from the section bar, and then the bending area of the next section of section bar is straightened.
Claims (6)
1. A method for straightening a profile, which utilizes a profile straightening device to straighten the profile, is characterized in that: the straightening steps are as follows:
the method comprises the steps of installing an arc-shaped upper die (61), a straight surface upper die (71), an arc-shaped lower support (62) and a straight surface lower support (72) which have the size and the shape corresponding to the straightening stress surface of the profile;
placing the bent section on the two lower supports, measuring bending data, enabling the arched surface to face upwards, and adjusting the two lower supports to a proper distance according to the bending degree;
the straightening device is started, the hydraulic jack (3) pushes the upper die to press the arched surface to gradually move downwards, and the upper die and the lower support are matched with each other until the straightness is qualified, and the pressing is stopped;
and fourthly, gradually moving the upper die upwards to be separated from the profile, and straightening the bending area of the next section of the profile.
2. Method for straightening profiles according to claim 1, characterized in that: the arc-shaped upper die (61) and the arc-shaped lower support (62) are matched for use, the straight surface upper die (71) and the straight surface lower support (72) are matched for use, and the working surface is consistent with the stress surface of the straightening profile in shape.
3. Method for straightening profiles according to claim 1, characterized in that: the section straightening device comprises a base (1), a rack (6), a top cover (2), a hydraulic jack (3) and an upper die base (5); the top cover is positioned at the upper part of the rack (6), the base is positioned at the lower part of the rack (6), the hydraulic jack (3) is fixed below the top cover (2) through a fastening bolt (4), and the upper part of the upper die holder is connected with a top disc (10) of the hydraulic jack; the method is characterized in that: the device is provided with an arc-shaped upper die (61) and an arc-shaped lower support (62), wherein the arc-shaped upper die (61) is connected with an upper die base, the arc-shaped lower support is installed on a base, and the arc-shaped upper die and the arc-shaped lower support are correspondingly arranged; a straight surface upper die (71) is arranged below the arc upper die, a straight surface lower support (72) is arranged above the arc lower support, and the straight surface upper die (71) and the straight surface lower support (72) are correspondingly arranged; the protective layer (8) is arranged in the working face of the upper die and the lower support of the straight face and is arranged on the inner wall of the working face through bolts.
4. Method for straightening profiles according to claim 3, characterized in that: the upper die holder (5) is connected with a top disc of the hydraulic jack in a welding mode; an inverted isosceles trapezoid clamping groove is formed in the lower portion of the upper die base (5), an inverted isosceles trapezoid clamping block (9) corresponding to the inverted isosceles trapezoid clamping groove is arranged above the arc-shaped upper die (61), and the arc-shaped upper die (61) is fixed below the upper die base (5) through the inverted isosceles trapezoid clamping groove.
5. Method for straightening profiles according to claim 3, characterized in that: the arc-shaped lower support (62) is placed on the platform of the base (1), and the straight surface lower support (72) is placed on the arc-shaped lower support.
6. Method for straightening profiles according to claim 3, characterized in that: the protective layer (8) is made of rubber, industrial plastic or PVC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210865249.3A CN115464006A (en) | 2022-07-21 | 2022-07-21 | Section bar straightening method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210865249.3A CN115464006A (en) | 2022-07-21 | 2022-07-21 | Section bar straightening method |
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| Publication Number | Publication Date |
|---|---|
| CN115464006A true CN115464006A (en) | 2022-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210865249.3A Pending CN115464006A (en) | 2022-07-21 | 2022-07-21 | Section bar straightening method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100051224A1 (en) * | 2007-04-09 | 2010-03-04 | Fumikazu Shiose | Method to move an upper mold in relation to a lower mold in a permanent mold casting machine and the permanent mold casting machine used for the method |
| CN102294384A (en) * | 2011-09-08 | 2011-12-28 | 中国石油集团渤海石油装备制造有限公司 | Steel pipe diameter-shaping and straightening equipment |
| CN102641916A (en) * | 2012-04-12 | 2012-08-22 | 燕山大学 | Four-point-bending over-bending straightening process method for large shaft tube parts |
| CN104492870A (en) * | 2014-12-30 | 2015-04-08 | 山东泰丰钢业有限公司 | Straightening device for eliminating bending defects of high frequency longitudinal seam welded pipe |
| CN104785578A (en) * | 2015-04-07 | 2015-07-22 | 江苏盐城二建集团有限公司 | Section steel straightening tool and use method thereof |
| CN213350276U (en) * | 2020-06-24 | 2021-06-04 | 无锡阿倍特科技有限公司 | Hydraulic straightening machine for profile steel |
-
2022
- 2022-07-21 CN CN202210865249.3A patent/CN115464006A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100051224A1 (en) * | 2007-04-09 | 2010-03-04 | Fumikazu Shiose | Method to move an upper mold in relation to a lower mold in a permanent mold casting machine and the permanent mold casting machine used for the method |
| CN102294384A (en) * | 2011-09-08 | 2011-12-28 | 中国石油集团渤海石油装备制造有限公司 | Steel pipe diameter-shaping and straightening equipment |
| CN102641916A (en) * | 2012-04-12 | 2012-08-22 | 燕山大学 | Four-point-bending over-bending straightening process method for large shaft tube parts |
| CN104492870A (en) * | 2014-12-30 | 2015-04-08 | 山东泰丰钢业有限公司 | Straightening device for eliminating bending defects of high frequency longitudinal seam welded pipe |
| CN104785578A (en) * | 2015-04-07 | 2015-07-22 | 江苏盐城二建集团有限公司 | Section steel straightening tool and use method thereof |
| CN213350276U (en) * | 2020-06-24 | 2021-06-04 | 无锡阿倍特科技有限公司 | Hydraulic straightening machine for profile steel |
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