CN103264190B - Broken edge cutting side gap adjusting mechanism - Google Patents

Broken edge cutting side gap adjusting mechanism Download PDF

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Publication number
CN103264190B
CN103264190B CN201310197535.8A CN201310197535A CN103264190B CN 103264190 B CN103264190 B CN 103264190B CN 201310197535 A CN201310197535 A CN 201310197535A CN 103264190 B CN103264190 B CN 103264190B
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cutter
adjusting mechanism
gap adjusting
nut
side gap
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CN103264190A (en
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冀俊杰
景群平
张勇安
任玉成
冯沙
郝乐
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China National Heavy Machinery Research Institute Co Ltd
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China National Heavy Machinery Research Institute Co Ltd
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Abstract

The invention relates to a broken edge cutting side gap adjusting mechanism which comprises an upper cutter mechanism, a lower cutter mechanism and a side gap adjusting mechanism. The upper cutter mechanism and the lower cutter mechanism are axially parallel. The side gap adjusting mechanism is arranged on one side of the upper cutter mechanism. The side gas adjusting mechanism comprises a moving small shaft, a main nut, an auxiliary nut, an adjusting motor, a thrust bearing, a locking nut, a guiding pillar and a moving disc. The moving small shaft and an upper cutter shaft are connected through the thrust bearing and the locking nut. The main nut and the auxiliary nut are fixed on a rack. Outer threads are arranged on the moving small shaft which is in screw thread pair connection with the main nut and the auxiliary nut. The adjusting motor is fixed on the moving disc. The moving disc can axially move along the guiding pillar on the guiding pillar. According to a laying manner of the direction of an inclination angle of a blade and the direction of an inclination angle of a bevel gear, a broken edge cutting blade side gap adjusting mathematic model of an inclined blade is deduced. The relation of angles and directions of the inclination angle of the blade and the inclination angle of the bevel gear is optimized. The broken edge cutting side gap adjusting mechanism is suitable for an adjusting mechanism in cutting sheets.

Description

A kind of scrap cutter side gap adjusting mechanism
Technical field
The present invention relates to a kind of finishing shearing equipment of silicon steel, particularly a kind of scrap cutter side gap adjusting mechanism.
Background technology
Silicon steel is the indispensable important magnetically soft alloy of the power electronics such as electric power, electronics, motor and transformer manufacturing, household electrical appliance, instrument and meter industry.
High magnetic sensing cold milling orientation silicon steel, also known as Hib steel, is described as the top product in orientation silicon steel " family ", thickness is thin, magnetic strength is high, iron loss is low, ultra-wide, and production technology is very complicated, is the critical material manufacturing super-huge energy-economic transformer.
Hib steel ultra-thin (thickness is only 0.15 ~ 0.35mm), easily crisp, limit split (the darkest limit is split and had 40mm), limit wave high (can reach 30 ~ 40mm), shearing slitter edge deeply and cannot batch.
Thin plate scrap cutter blade lateral space self is about 1/10 of thickness of strip, at this to shear the thin plate of 0.2mm, gap blade need be adjusted to 0.02mm, and the relative slab blade lateral space self of thin plate blade lateral space self will reduce at double, and the precision of blade lateral space self adjustment will improve relative to slab blade side clearance Adjustment precision.
Tradition cut deal scrap cutter blade side clearance adjusting mechanism adopts worm gear structure, and this kind of structure is suitable for shearing cut deal, the mechanical precision of worm and gear and error for the ratio that affects of slab gap blade in allowed band.Be 0.01mm ~ 0.03mm for thin plate scrap cutter blade clearance requirement adjusting range, the mechanical precision of worm and gear cannot meet this requirement, and therefore the mode of worm and gear adjustment sideshake is inapplicable in thin plate scrap cutter.Blade is arranged in the relation in rotary drum inclination angle direction and direction, helical gear angle of inclination can not adopt traditional slab scrap cutter arrangement form.
Summary of the invention
The object of this invention is to provide a kind of scrap cutter side gap adjusting mechanism being applicable to thin plate and shearing.
The object of the present invention is achieved like this, a kind of scrap cutter side gap adjusting mechanism, it is characterized in that: comprise cutter mechanism, lower cutter mechanism and side gap adjusting mechanism, upper cutter mechanism is axially parallel with lower cutter mechanism, upper slitter mechanism side is provided with side gap adjusting mechanism, described side gap adjusting mechanism comprises: mobile little axle, mother nut, secondary nut, adjustment motor, thrust bearing, locking nut, lead and displacement disc, and mobile little axle and upper cutter shaft are linked by thrust bearing and locking nut; Mother nut and secondary nut are fixed in frame; Mobile little axle there is external screw thread, is formed with mother nut, secondary nut and rotate screw thread pair and be connected; Regulate motor to be fixed on displacement disc, displacement disc can along lead axially-movable on lead; Adjustment process is: regulate driven by motor to move little axle and rotate, it is rectilinear motion by convert rotational motion that mobile little axle rotates past mother nut, secondary nut, mobile little axle promotes upper cutter shaft and realizes axial displacement, drives and regulate motor and displacement disc axially to form displacement at lead when mobile little axle moves; The play of mobile little axle axis is eliminated in gap between adjustment mother nut and secondary nut.
Described upper cutter mechanism comprises rotary drum, upper cutter shaft, major-minor gear, upper rotary drum is connected by upper cutter shaft with major-minor gear, lower cutter mechanism comprises lower rotary drum, lower cutter shaft, travelling gear, lower rotary drum is connected by lower cutter shaft with travelling gear, be equipped with 4 cutters in upper rotary drum circumference equal distribution, be equipped with 4 bottom knife in the circumferential equal distribution of lower rotary drum.
The relative rotation synchronized with lower rotary drum of described upper rotary drum, drives cutter and bottom knife to be formed and shears; Revolving turns around can form 4 shear histories.
Described major-minor gear and travelling gear are paired bevel gear set, and the profile of tooth of bevel gear set and axial angle are Gear tipping angle .
The displacement of cutter shaft on displacement sensor is installed at displacement disc place.
Described cutter tilts vertically certain angle on upper rotary drum arrange, bottom knife tilts vertically equal angular on lower rotary drum arrange.
Beneficial effect of the present invention: the mode and the blade that it solve adjustment sideshake are arranged in the relation in rotary drum inclination angle direction and direction, helical gear angle of inclination; The angled blade scrap cutter blade side clearance that the arrangement in foundation blade tilt angle direction and direction, helical gear angle of inclination is derived adjusts Mathematical Modeling, optimize blade tilt angle and helical gear angle of inclination direction relations, design the scrap cutter side gap adjusting mechanism being applicable to thin plate and shearing, for angled blade scrap cutter blade lateral space self automation adjustment is provided fundamental basis.
Accompanying drawing explanation
Below in conjunction with embodiment accompanying drawing, the invention will be further described:
Fig. 1 is embodiment of the present invention schematic diagram;
Fig. 2 a is rotary drum blade arrangement structure chart in Fig. 1;
Fig. 2 b is that cutter 8 and bottom knife 9 are arranged in pairs;
Fig. 3 is blade side clearance guiding mechanism structure chart in Fig. 1;
Fig. 4 is blade tilt angle direction and helical gear inclination direction layout drawing.
In figure, 1. go up rotary drum; 2. go up cutter shaft; 3. major-minor gear; 4. descend rotary drum; 5. descend cutter shaft; 6. travelling gear; 7, side gap adjusting mechanism; 8. cutter; 9. bottom knife; 10. move little axle; 11. mother nuts; 12. secondary nuts; 13. regulate motor; 14. thrust bearings; 15. locking nuts; 16. leads; 17. displacement discs.
Detailed description of the invention
Embodiment 1
A kind of scrap cutter side gap adjusting mechanism, comprise cutter mechanism, lower cutter mechanism and side gap adjusting mechanism 7, upper cutter mechanism is axially parallel with lower cutter mechanism, upper slitter mechanism side is provided with side gap adjusting mechanism 7, described side gap adjusting mechanism 7 comprises: mobile little axle 10, mother nut 11, secondary nut 12, adjustment motor 13, thrust bearing 14, locking nut 15, lead 16 and displacement disc 17, and mobile little axle 10 is linked by thrust bearing 14 and locking nut 15 with upper cutter shaft 2; Mother nut 11 and secondary nut 12 are fixed in frame; Mobile little axle 10 there is external screw thread, is formed with mother nut 11, secondary nut 12 and rotate screw thread pair and be connected; Regulate motor 13 to be fixed on displacement disc 17, displacement disc 17 can along lead 16 axially-movable on lead 16; Adjustment process is: regulate motor 13 to drive mobile little axle 10 to rotate, it is rectilinear motion by convert rotational motion that mobile little axle 10 rotates past mother nut 11, secondary nut 12, mobile little axle 10 promotes upper cutter shaft 2 and realizes axial displacement, drives and regulate motor 13 axially to form displacement with displacement disc 17 at lead 16 when mobile little axle 10 moves; Adjustment mother nut 11 and secondary nut 12 eliminate the play of mobile little axle 10 axis.
Embodiment 2
As shown in Figure 1, comprise cutter mechanism, lower cutter mechanism and side gap adjusting mechanism 7, upper cutter mechanism is axially parallel with lower cutter mechanism, upper cutter mechanism comprises rotary drum 1, upper cutter shaft 2, major-minor gear 3, upper rotary drum 1 is connected by upper cutter shaft 2 with major-minor gear 3, lower cutter mechanism comprises lower rotary drum 4, lower cutter shaft 5, travelling gear 6, and lower rotary drum 4 is connected by lower cutter shaft 5 with travelling gear 6, has side gap adjusting mechanism 7 at upper slitter organization establishes.
As shown in Figure 2 a, be equipped with 4 cutters 8 in the circumferential equal distribution of upper rotary drum 1, be equipped with 4 bottom knife 9 in the circumferential equal distribution of lower rotary drum 4.As shown in Figure 4, cutter 8 tilts vertically certain angle on upper rotary drum 1 arrange, bottom knife 9 tilts vertically equal angular on lower rotary drum 4 arrange, upper and lower blade tilt rotation direction.Scrap cutter work cutter shaft 5 transmission at present, by travelling gear 6 and the synchronized transmission of major-minor gear 3, the relative rotation synchronized with lower rotary drum 4 of upper rotary drum 1, drives cutter 8 and bottom knife 9 to be formed and shears.Revolving turns around can form 4 shear histories.Major-minor gear 3 and travelling gear 6 are paired bevel gear set.Helical gear profile of tooth and axial angle are Gear tipping angle .
As shown in Figure 2 b, cutter 8 and bottom knife 9 arrange mutually should have accurate gap at shear history in pairs, and this gap is with to be sheared thickness relevant, and the different-thickness of same material requires different gap widths.This gap we be referred to as blade side clearance.Side clearance between blade is adjusted by side gap adjusting mechanism 7, and side gap adjusting mechanism 7 moves axially realization by promoting upper slitter whole mechanism.Cutter shaft moves axially the rotation adding upper and lower cutter shaft in process through the transmission of gear pair.Cutter shaft move axially and rotate cause up and down, the side clearance change of corresponding blade on rotary drum.
Side gap adjusting mechanism 7 comprises as shown in Figure 3: mobile little axle 10, mother nut 11, secondary nut 12, regulate motor 13, thrust bearing 14, locking nut 15, lead 16, displacement disc 17, mobile little axle 10 is linked by thrust bearing 14 and locking nut 15 with upper cutter shaft 2; Mother nut 11 and secondary nut 12 are fixed in frame.Mobile little axle 10 there is external screw thread, is formed rotate screw thread pair with mother nut 11, secondary nut 12; Regulate motor 13 to be fixed on displacement disc 17, displacement disc 17 can along lead 16 axially-movable on lead 16.Adjustment process is: regulate motor 13 to drive mobile little axle 10 to rotate, it is rectilinear motion by convert rotational motion that mobile little axle 10 rotates past mother nut 11, secondary nut 12, mobile little axle 10 promotes upper cutter shaft 2 and realizes axial displacement, drives and regulate motor 13 axially to form displacement with displacement disc 17 at lead 16 when mobile little axle 10 moves.The displacement of displacement disc 17 is the displacement of cutter shaft 2.The displacement of cutter shaft 2 can be measured at displacement disc 17 place installation position displacement sensor.The change of the side clearance between the paired blades of arranging on dish 1 and lower rotary drum 4 on the rotation of the displacement of cutter shaft and cutter shaft self causes, the relation according to cutter shaft displacement and side clearance controls to adjust to upper and lower blade side clearance automatically.
The axial float of mobile little axle 10 can bring moving axially of cutter mechanism, and directly have influence on the precision of blade side clearance, strip scrap cutter does not allow little axle 10 to have axial float.The gap screw thread pair that disappears consisted of adjustment mother nut 11 and secondary nut 12 eliminates the play of mobile little axle 10 axis, controls play at 0.01mm ~ 0.02mm.The present invention is simple and be easy to process and assemble.
Blade tilt angle size and direction and helical gear inclination angle size and the arrangement reasonability in direction directly have influence on the precision of sideshake adjustment, when shearing silicon steel thin belt (0.2mm ~ 0.5), required side clearance value is 0.02mm ~ 0.05mm, side clearance adjustment accuracy is ± 0.001mm, adopts the arrangement of Fig. 4 in order to accurately obtain the present invention of side clearance predetermined value.
According to blade tilt angle size and direction and helical gear inclination angle size and the arrangement in direction can derive the corresponding model of side clearance change, utilize this Mathematical Modeling can realize the Automated condtrol of side clearance.
Relation according to cutter shaft displacement and side clearance controls to adjust to upper and lower blade side clearance automatically, comprises the steps:
1) according to blade tilt angle size and direction and helical gear inclination angle size and the corresponding Mathematical Modeling of arrangement establishment side gap change in direction, or the side clearance value dip of upper bottom knife and displacement p relation:
(1)
Side gap adjusting mechanism adopts screw thread pair that the rotation of little axle side is become the rotation of upper cutter shaft and moves axially, and setting its displacement is P, and setting blade tilt angle is , Gear tipping angle is , with rotation direction is identical;
2) in input production, the thickness of supplied materials band is t;
3) rule of thumb obtain shearing the blade side clearance value dip=0.1t (dip is blade side clearance value, and t is supplied materials thickness of strip) needed for supplied materials;
4) the side clearance dip corresponding cutter shaft amount of movement p value sheared and need is calculated according to formula (1);
5) utilize the displacement transducer being arranged on displacement disc 17 place to carry out p value to detect;
6) detect p value whether to be zero with calculating p value difference value or to be less than setting value;
7) non-vanishing or be greater than setting value, adjustment cutter shaft axial displacement P, returns step 6);
8) be zero or be less than setting value, stop the axial displacement of adjustment cutter shaft.
The parts that the present embodiment does not describe in detail and structure belong to the well-known components of the industry and common structure or conventional means, do not describe one by one here.

Claims (6)

1. a scrap cutter side gap adjusting mechanism, it is characterized in that: comprise cutter mechanism, lower cutter mechanism and side gap adjusting mechanism (7), upper cutter mechanism is axially parallel with lower cutter mechanism, upper cutter mechanism side is provided with side gap adjusting mechanism (7), described side gap adjusting mechanism (7) comprising: mobile little axle (10), mother nut (11), secondary nut (12), regulate motor (13), thrust bearing (14), locking nut (15), lead (16) and displacement disc (17), mobile little axle (10) is linked by thrust bearing (14) and locking nut (15) with upper cutter shaft (2), mother nut (11) and secondary nut (12) are fixed in frame, mobile little axle (10) there is external screw thread, is formed with mother nut (11), secondary nut (12) and rotate screw thread pair and be connected, regulate motor (13) to be fixed on displacement disc (17), displacement disc (17) can along lead (16) axially-movable on lead (16), adjustment process is: regulate motor (13) to drive mobile little axle (10) to rotate, it is rectilinear motion by convert rotational motion that mobile little axle (10) rotates past mother nut (11), secondary nut (12), in mobile little axle (10) promotion, cutter shaft (2) realizes axial displacement, drives and regulate motor (13) axially to form displacement with displacement disc (17) at lead (16) when mobile little axle (10) is mobile, adjustment mother nut (11) and secondary nut (12) eliminate the axial play of mobile little axle (10).
2. a kind of scrap cutter side gap adjusting mechanism according to claim 1, it is characterized in that: described upper cutter mechanism comprises rotary drum (1), upper cutter shaft (2), major-minor gear (3), upper rotary drum (1) is connected by upper cutter shaft (2) with major-minor gear (3), lower cutter mechanism comprises lower rotary drum (4), lower cutter shaft (5), travelling gear (6), lower rotary drum (4) is connected by lower cutter shaft (5) with travelling gear (6), 4 cutters (8) are equipped with in upper rotary drum (1) circumferential equal distribution, 4 bottom knife (9) are equipped with in the circumferential equal distribution of lower rotary drum (4).
3. a kind of scrap cutter side gap adjusting mechanism according to claim 2, is characterized in that: described upper rotary drum (1) and the synchronized relative rotation of lower rotary drum (4), drives cutter (8) and bottom knife (9) to be formed and shears; Revolving turns around can form 4 shear histories.
4. a kind of scrap cutter side gap adjusting mechanism according to claim 2, is characterized in that: described major-minor gear (3) and travelling gear (6) are paired bevel gear set, and the profile of tooth of bevel gear set and axial angle are Gear tipping angle .
5. a kind of scrap cutter side gap adjusting mechanism according to claim 1, is characterized in that: the displacement installing cutter shaft (2) on displacement sensor at displacement disc (17) place.
6. a kind of scrap cutter side gap adjusting mechanism according to claim 2, is characterized in that: described cutter (8) tilts vertically certain angle on upper rotary drum (1) arrange, bottom knife (9) tilts vertically equal angular on lower rotary drum (4) arrange.
CN201310197535.8A 2013-05-24 2013-05-24 Broken edge cutting side gap adjusting mechanism Active CN103264190B (en)

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103785892B (en) * 2014-01-22 2016-03-16 中国重型机械研究院股份公司 A kind of for high accuracy circle shear sideshake guiding mechanism
CN106289143A (en) * 2016-08-15 2017-01-04 南京钢铁股份有限公司 A kind of scrap cutter gap correct measurement device of circle shear

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3718064A (en) * 1971-01-21 1973-02-27 Steel Corp Apparatus for adjustment of side trimmer knife
US4428265A (en) * 1981-10-22 1984-01-31 Industrial Tools Inc. Tape slitter axial loading system
CN201324883Y (en) * 2008-12-04 2009-10-14 中国重型机械研究院 Device for eliminating radial clearance between upper cutter shafts of drum-type flying shear
CN202317221U (en) * 2011-11-27 2012-07-11 襄阳博亚精工机器有限公司 Scrap cutter shaft system
CN102699410A (en) * 2012-06-09 2012-10-03 中色科技股份有限公司 Axial micro adjusting method for side clearance of meshed cutter head of side crusher
CN202639488U (en) * 2012-06-19 2013-01-02 襄阳博亚精工机器有限公司 Automatic adjusting system of shearing blade side clearance of precise circle shear
CN203292587U (en) * 2013-05-24 2013-11-20 中国重型机械研究院股份公司 Scrap cutter side gap adjusting device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0994712A (en) * 1995-09-29 1997-04-08 Kawasaki Steel Corp Clearance adjusting method for trimming device
JP3232273B2 (en) * 1998-03-31 2001-11-26 川崎製鉄株式会社 Strip steel trimming equipment
JPH11291115A (en) * 1998-04-13 1999-10-26 Nippon Steel Corp Clearance adjusting device for side reamer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3718064A (en) * 1971-01-21 1973-02-27 Steel Corp Apparatus for adjustment of side trimmer knife
US4428265A (en) * 1981-10-22 1984-01-31 Industrial Tools Inc. Tape slitter axial loading system
CN201324883Y (en) * 2008-12-04 2009-10-14 中国重型机械研究院 Device for eliminating radial clearance between upper cutter shafts of drum-type flying shear
CN202317221U (en) * 2011-11-27 2012-07-11 襄阳博亚精工机器有限公司 Scrap cutter shaft system
CN102699410A (en) * 2012-06-09 2012-10-03 中色科技股份有限公司 Axial micro adjusting method for side clearance of meshed cutter head of side crusher
CN202639488U (en) * 2012-06-19 2013-01-02 襄阳博亚精工机器有限公司 Automatic adjusting system of shearing blade side clearance of precise circle shear
CN203292587U (en) * 2013-05-24 2013-11-20 中国重型机械研究院股份公司 Scrap cutter side gap adjusting device

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