CN114101784A - Elastic flat fixed-length shearing method for stepped shear blades - Google Patents
Elastic flat fixed-length shearing method for stepped shear blades Download PDFInfo
- Publication number
- CN114101784A CN114101784A CN202111573924.7A CN202111573924A CN114101784A CN 114101784 A CN114101784 A CN 114101784A CN 202111573924 A CN202111573924 A CN 202111573924A CN 114101784 A CN114101784 A CN 114101784A
- Authority
- CN
- China
- Prior art keywords
- shearing
- shear
- length
- flat
- edge area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010008 shearing Methods 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000005520 cutting process Methods 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 238000009434 installation Methods 0.000 claims abstract description 6
- 238000000926 separation method Methods 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 description 18
- 239000010959 steel Substances 0.000 description 18
- 238000005516 engineering process Methods 0.000 description 5
- 229910000639 Spring steel Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000035929 gnawing Effects 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D35/00—Tools for shearing machines or shearing devices; Holders or chucks for shearing tools
- B23D35/001—Tools for shearing machines or shearing devices; Holders or chucks for shearing tools cutting members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D31/00—Shearing machines or shearing devices covered by none or more than one of the groups B23D15/00 - B23D29/00; Combinations of shearing machines
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shearing Machines (AREA)
Abstract
The invention discloses a method for elastic flat fixed-length shearing with a stepped shearing edge, which is implemented according to the following steps: 1. increasing the length of the lower shear blade from 750mm to 800mm, so that the lengths of the upper and lower shear blades are consistent, and the effective shearing length of the upper and lower shear blades is increased; the upper shear blade is designed and manufactured into two steps: the step height difference between the high shearing edge area and the low shearing edge area is half of the elastic-flat thickness during shearing; 2. after adopting cascaded cutting edge, overlap ratio is big when high shear edge district is cuted, exceeds 10mm, adjusts two parameters of cutting edge clearance and cutting edge overlap ratio: the blade clearance is increased from the common 0.3mm to 0.5mm during installation; reducing the contact ratio from 5mm to 2mm based on one end of the low-shear edge area; 3. designing and manufacturing a separation chute at a roller way before shearing, dividing the flat bullets entering a shearing edge area in rows into two parts, and dividing one part of the bullets into a low shearing edge area; a portion is diverted to the high shear region. The method can double the shearing efficiency of the fixed-length shears.
Description
Technical Field
The invention relates to a flat and flat fixed-length shearing method of a stepped shearing blade.
Background
Background art 1: in recent years, the automobile industry in China is developed rapidly, and heavy load and high efficiency are pursued for trucks. The requirements on the spring steel plate with the functions of shock absorption and bearing are higher and higher correspondingly, and the requirements on the section of the spring steel plate are higher and higher. At present, the requirement on the specification of the spring steel plate in China is that the thickness reaches 40mm, and the width reaches 120 mm. Background art 2: the base material for manufacturing the spring steel plate is spring flat steel rolled and produced by a steel plant. Most steel mills adopt a fixed-length shearing process to shear and collect the spring flat steel when producing the spring flat steel. The spring flat steel has high hardness and high strength, and when the section size is large, the shearing capability of the fixed-length shear is insufficient. The shearing count is forced to be reduced on site, and the production efficiency is influenced. And (3) searching documents: (1) sun Yingzi, optimization of a rod line cold shearing area sizing shearing control system, mechanical engineering and automation 2016 (6) months; (2) in the ocean, the application and practice of the cut-to-length shear of the production line of fine bars, which is 5 months in 2017 of the Chinese high and new technology enterprise; (3) yang Xiongying, Lin Yongming, a device for improving the cutting capability of cold shears to large-size bars, 2014; (4) the Song Jian, Wangqiang and Chenwen oven improve the production practice of the rod sizing rate, and the Sichuan metallurgy is 2019 years. As can be seen from the above search documents, in the prior art, the method for improving the shear capacity of the bar material in the fixed length mode mainly adopts the mode of improving the bearing capacity of the crankshaft or enlarging the whole equipment, and there is no application technology for improving the shear capacity by designing a novel shear blade and changing the shear mode.
When large-scale bullet flat is produced in domestic steel mill, most all have the scale and cut the not enough problem of ability. Eight small-size unit scale of steel are cut for 450 tons of combination formula swing scissors, and cutting edge length: 800 mm; maximum shear force: 450 tons; maximum shear area in the process of producing elastic flat: 3600mm2. The size of the bullet below 20x90mm can be cut only two at a time, and the size of the bullet above 20x90mm can be cut only one at a time. The shearing efficiency is very low, and the performance of the large-specification flat-elastic capacity of the eight-steel small-sized unit is seriously influenced.
Disclosure of Invention
The invention aims to provide a method for shearing flat springs to a fixed length by using a stepped shear blade, which can double the shearing efficiency of the fixed length shears by designing a novel shear blade and optimizing the shearing method, and solves the bottleneck problem of low fixed length shearing efficiency when a steel plant produces large-size flat springs.
The technical scheme adopted by the invention is as follows: a method for shearing a stepped shear blade into flat and elastic fixed length is implemented according to the following steps: 1. increasing the length of the lower shear blade from 750mm to 800mm, so that the lengths of the upper and lower shear blades are consistent, and the effective shearing length of the upper and lower shear blades is increased; the upper shear blade is designed and manufactured into two steps: the step height difference between the high shearing edge area and the low shearing edge area is half of the elastic-flat thickness during shearing; 2. after adopting cascaded cutting edge, overlap ratio is big when high shear edge district is cuted, exceeds 10mm, adjusts two parameters of cutting edge clearance and cutting edge overlap ratio: the blade clearance is increased from the common 0.3mm to 0.5mm during installation; reducing the contact ratio from 5mm to 2mm based on one end of the low-shear edge area; 3. designing and manufacturing a separation chute at a roller way before shearing, dividing the flat bullets entering a shearing edge area in rows into two parts, and dividing one part of the bullets into a low shearing edge area; a portion is diverted to the high shear region.
And correcting the installation parameters of the shear blades by observing the levelness of the section of the shear fracture and the coincidence condition of the upper shear blade and the lower shear blade. The blade clearance is increased from the common 0.3mm to 0.5mm during installation; the overlap ratio is reduced from the usual 5mm to 2mm, based on the lower end of the cutting edge on the step. The problem of 'cutting edge gnawing' caused by overlarge overlap ratio of the high-end part of the upper cutting edge can be avoided through the optimization and correction of the two parameters. The stepped cutting edge bullet flat fixed length shearing technology is put into use in an eight-steel small-sized unit in 2021 month and starts to be applied, ten thousand tons of large-sized bullets are sheared, and the using effect is good. The fixed-length shearing efficiency of the large-size elastic flat is increased from the original 50 tons/hour to 100 tons/hour. The production capacity level of the large-size flat bullet of the eight-steel small-sized unit is greatly improved. The shearing section is parallel and level, and the quality is good without the defects of burrs and the like. During shearing operation, tracking verification is carried out on the shearing current load of the transmission motor of the fixed-length shear, when 20x90 is sheared and the steel is sheared to be flat, the shearing current load of the motor is between 1110 and 1140A, when 2 steel is sheared, and when 4 steel is sheared by adopting the stepped shearing edge technology, the shearing current load of the motor is between 1120 and 1140A, and the loads of the two are basically consistent. It is demonstrated that the shear efficiency can be doubled without increasing the shear load with this invention. The invention can be transplanted to the fixed-length shearing of steel products such as large-section round steel, section steel and the like, has no special limitation, and has stronger popularization and application prospects.
Drawings
FIG. 1 is a schematic view of a shear blade according to the present invention;
figure 2 is a view of the cutting edge of the present invention in an operative condition;
figure 3 is a view of another state of operation of the cutting edge of the present invention.
Detailed Description
A flat and elastic fixed-length cutting method of a stepped cutting edge is implemented according to the following steps as shown in figures 1, 2 and 3: 1. increasing the length of the lower shear blade from 750mm to 800mm, so that the lengths of the upper and lower shear blades are consistent, and the effective shearing length of the upper and lower shear blades is increased; the upper shear blade is designed and manufactured into two steps: the high-shearing edge area 2 and the low-shearing edge area 1 have a step height difference L1 of half the elastic-flat thickness during shearing; 2. after adopting cascaded cutting edge, overlap ratio is big when high shear edge district is cuted, exceeds 10mm, adjusts two parameters of cutting edge clearance and cutting edge overlap ratio: the blade clearance is increased from the common 0.3mm to 0.5mm during installation; reducing the contact ratio from 5mm to 2mm based on one end of the low-shear edge area; 3. designing and manufacturing a separation chute at a roller way before shearing, dividing the flat bullets entering a shearing edge area in rows into two parts, and dividing one part of the bullets into a low shearing edge area; a portion is diverted to the high shear region.
Taking 20x90mm elastic flat shearing as an example, the fixed-length shear before modification can only shear two elastic flat at most once. By adopting the technology of the invention, the roller way before shearing can simultaneously convey four flat bullets, and two of the bullets are conveyed to the low shearing edge area 1 and the other two bullets are conveyed to the high shearing edge area 2 by the separation chute (the prior art). During shearing, the upper shearing blade moves downwards, the high shearing blade end firstly touches the flat spring for shearing, only two flat springs at the high shearing blade end are sheared at the moment, and the flat spring at the low shearing blade end does not start shearing yet, as shown in figure 2; the shearing blades continue to move downwards, the high-shearing-blade end is contacted with the bullet flat to continue shearing after the bullet flat is sheared, and only two bullet flat are sheared at the time, as shown in figure 3. Therefore, under the condition that the shearing capacity of the fixed-length shears is not exceeded, the shearing efficiency of the fixed-length shears is directly doubled, and the large-size flat elastic capacity is greatly improved.
Claims (1)
1. A method for shearing a stepped shear blade into flat and elastic fixed length is characterized by comprising the following steps: 1. increasing the length of the lower shear blade from 750mm to 800mm, so that the lengths of the upper and lower shear blades are consistent, and the effective shearing length of the upper and lower shear blades is increased; the upper shear blade is designed and manufactured into two steps: the step height difference between the high shearing edge area and the low shearing edge area is half of the elastic-flat thickness during shearing; 2. after adopting cascaded cutting edge, overlap ratio is big when high shear edge district is cuted, exceeds 10mm, adjusts two parameters of cutting edge clearance and cutting edge overlap ratio: the blade clearance is increased from the common 0.3mm to 0.5mm during installation; reducing the contact ratio from 5mm to 2mm based on one end of the low-shear edge area; 3. designing and manufacturing a separation chute at a roller way before shearing, dividing the flat bullets entering a shearing edge area in rows into two parts, and dividing one part of the bullets into a low shearing edge area; a portion is diverted to the high shear region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111573924.7A CN114101784A (en) | 2021-12-21 | 2021-12-21 | Elastic flat fixed-length shearing method for stepped shear blades |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111573924.7A CN114101784A (en) | 2021-12-21 | 2021-12-21 | Elastic flat fixed-length shearing method for stepped shear blades |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114101784A true CN114101784A (en) | 2022-03-01 |
Family
ID=80362424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111573924.7A Pending CN114101784A (en) | 2021-12-21 | 2021-12-21 | Elastic flat fixed-length shearing method for stepped shear blades |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114101784A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH455457A (en) * | 1963-11-07 | 1968-07-15 | Lindemann Maschfab Gmbh | Scissors for cutting old material, especially sheet metal |
| US4715256A (en) * | 1985-11-19 | 1987-12-29 | Wiederaufarbeitungsanlage Karlsruhe Betriebsgesellschaft Mbh | Fuel element shears having a stepped blade |
| JPH0679518A (en) * | 1992-08-28 | 1994-03-22 | Nippon Steel Corp | Simultaneous shearing device for a number of bar stocks |
| CN105102192A (en) * | 2012-10-04 | 2015-11-25 | 格罗兹-贝克特公司 | Method and tool unit for setting punching gap |
| CN105473297A (en) * | 2013-06-10 | 2016-04-06 | 二和金刚石工业株式会社 | Stone cutting device |
| CN106513812A (en) * | 2016-12-30 | 2017-03-22 | 济南泽业机床制造有限公司 | Plate shearing machine with segmented upper knife |
| CN207205403U (en) * | 2017-09-23 | 2018-04-10 | 武钢集团昆明钢铁股份有限公司 | The steady reliable cold shears oblique line shear knife bottom of one kind shearing |
| US20180330990A1 (en) * | 2017-05-09 | 2018-11-15 | Disco Corporation | Method of processing workpiece |
-
2021
- 2021-12-21 CN CN202111573924.7A patent/CN114101784A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH455457A (en) * | 1963-11-07 | 1968-07-15 | Lindemann Maschfab Gmbh | Scissors for cutting old material, especially sheet metal |
| US4715256A (en) * | 1985-11-19 | 1987-12-29 | Wiederaufarbeitungsanlage Karlsruhe Betriebsgesellschaft Mbh | Fuel element shears having a stepped blade |
| JPH0679518A (en) * | 1992-08-28 | 1994-03-22 | Nippon Steel Corp | Simultaneous shearing device for a number of bar stocks |
| CN105102192A (en) * | 2012-10-04 | 2015-11-25 | 格罗兹-贝克特公司 | Method and tool unit for setting punching gap |
| CN105473297A (en) * | 2013-06-10 | 2016-04-06 | 二和金刚石工业株式会社 | Stone cutting device |
| CN106513812A (en) * | 2016-12-30 | 2017-03-22 | 济南泽业机床制造有限公司 | Plate shearing machine with segmented upper knife |
| US20180330990A1 (en) * | 2017-05-09 | 2018-11-15 | Disco Corporation | Method of processing workpiece |
| CN207205403U (en) * | 2017-09-23 | 2018-04-10 | 武钢集团昆明钢铁股份有限公司 | The steady reliable cold shears oblique line shear knife bottom of one kind shearing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101875135A (en) | Cross cut shears for slitting and leveling flat steel | |
| CN102275007A (en) | Lead ingot slicing machine | |
| CN106077258A (en) | A kind of preparation method of high abrasion wavy spring | |
| CN101058109A (en) | Bars and tubes material unsymmetrical radial welding punched high performance precision blanking method | |
| CN100592950C (en) | Titanium sponge pulverizing method | |
| CN114101784A (en) | Elastic flat fixed-length shearing method for stepped shear blades | |
| CN204638310U (en) | Biomass fuel forces broken apart mechanism | |
| CN202639476U (en) | Gantry type dual-cylinder shearing machine | |
| CN204589835U (en) | A kind of production system of wind-proof dust-suppression net | |
| CN201913309U (en) | Hydraulic pressing device for multifunctional hydraulic combined punching and shearing machine | |
| CN101596482A (en) | A kind of paper shredding cutters and processing method thereof | |
| CN213497650U (en) | Skirtboard plate shearing and rounding integrated machine | |
| CN217666726U (en) | Air cooling scale shearing mechanism of high performance hot rolling round steel rod | |
| CN116251633A (en) | Multistage compound jaw breaker | |
| CN2269259Y (en) | Novel stretch bending stress material cutter | |
| CN213500236U (en) | Waste tire dicer | |
| CN208362769U (en) | A kind of high-efficiency wet tissue production cutter | |
| CN201231167Y (en) | Mechanically fixed rubber plastic crushing cutter | |
| CN205763224U (en) | Waste material cutting apparatus | |
| CN2772694Y (en) | Round steel cutter | |
| CN110340215A (en) | A kind of tup completely attached to for low stress blanking middle (center) bearing-bar | |
| CN217121935U (en) | Pressing mechanism of inclined shearing machine | |
| CN210937397U (en) | Shear cylinder connecting ball head structure | |
| CN202185635U (en) | Lead ingot slicing machine | |
| CN112960302B (en) | Pin shaft installation method of shear-reducing push plate oil cylinder seat |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |