CN203061959U - Flying shear with controllable shear edge backlashes - Google Patents
Flying shear with controllable shear edge backlashes Download PDFInfo
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- CN203061959U CN203061959U CN 201320016962 CN201320016962U CN203061959U CN 203061959 U CN203061959 U CN 203061959U CN 201320016962 CN201320016962 CN 201320016962 CN 201320016962 U CN201320016962 U CN 201320016962U CN 203061959 U CN203061959 U CN 203061959U
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Abstract
The utility model relates to a flying shear with controllable shear edge backlashes, and belongs to the technical field of metallurgy and rolling. Helical gears are used as distribution stage gears connected with a shear shaft in a shear body box body. A driving gear on a driving shaft is meshed with a second driven gear on a driven shaft and a third driven gear on the driven shaft simultaneously, and an adjusting shim is arranged between the two driven gears. A locating pin and the adjusting shim are arranged between the two driven gears, and the two driven gears are firmly combined into a whole through an axial locking device. The two driven gears are constant-strength helical gears, tooth form parameters of the two driven gears are identical, and each gear can bear acceleration moment, shearing moment and braking moment of the flying shear individually. The sizes of the mesh backlashes among the gears are adjusted through grinding the adjusting shim or increasing the thickness of the adjusting shim, and the gear backlashes can be very small. The flying shear with the controllable shear edge backlashes has the advantages that manufacturing accuracy and manufacturing cost of the distribution stage gears can be greatly reduced, and after the gears are abraded, the gear backlashes can be adjusted again through grinding or replacing of the shim.
Description
Technical field
The utility model belongs to the metallurgy rolling technical field, particularly relates to the controlled flying shear of a kind of blade clearance, is applicable in the rolling or belt steel rolling of long material rolled piece is carried out crop, back-end crop, cataclasm, finished product scale.
Background technology
At present on the rolling and belt steel rolling production line of long material, generally adopt flying shear to carry out work such as crop, back-end crop, cataclasm, finished product shearing.The rolling flying shear of long material adopts revolution to cut more or crank is cut, and the flying shear of strip-rolling adopts the rotary drum flying shear more.No matter be the flying shear of which kind of form, the control of blade clearance all is crucial.Particularly cut for finished product, if blade clearance is excessive, must bring bigger vibration and impact to the transmission system of flying shear, influence the life-span of flying shear.On the other hand, blade clearance is excessive, will influence the clip quality greatly, causes the cutting edge quick abrasion, even situation about can't cut off occurs.
Generally, the distribution stage gear shaft in the flying shear casing is cut axle exactly, so the minimum backlash values of flying shear blade is to be determined by the sideshake of cutting a last distribution stage gear.Finished product is cut common employing is gear pair close to zero sideshake, even the domestic best Gear Processing unit of the height of its machining accuracy all is difficult to reach.This has just greatly increased Gear Processing difficulty and processing cost, has become the hard nut to crack in the flying shear manufacture process.
The method of at present common elimination gear backlash mainly contains: spring balancing method and secondary tooth cushioning method.The spring balancing method is by spring two teeth of engagement to be remained to be squeezed in a side, but this mode can only be applicable to the equipment (cutting as cataclasm) of continuous rotation, and is not suitable for the flying shear that needs bigger braking torque under the start-stop duty.Flying shear needs very big instantaneous shearing torque at shear history, and after shearing finished, cutting edge need stop rapidly needing to overcome the inertia distance of whole cutting system in this process to shearing start bit, and the strength that only relies on spring is to be maintained gear zero sideshake.Secondary tooth cushioning method refers to that the driven gear that is meshed with driving gear is two gears: one of them gear is slightly narrower than driving gear, another gear width narrower (or being called secondary tooth).Between these two gears, be added with pad.The thickness of adjusting intermediate washer namely can the control gear sideshake.During normal the engagement, bear big unidirectional torque by wideer driven gear, caused less opposing torque when secondary tooth only bears owing to system's reduction of speed.This method only plays a part to reduce gear backlash, and secondary tooth does not bear to be changeed distance or only bear very little commentaries on classics distance.Be mainly used in the little occasion of reverse impact (as scrap cutter etc.).Because the limitation of last returning method except by the machining accuracy that improves the distribution stage gear, other the method that better reduces gear backlash also do not occur at present.
Summary of the invention
The purpose of this utility model is the flying shear that provides a kind of blade clearance controlled to have solved above-mentioned flying shear Gear Processing difficulty, the high hard nut to crack of processing cost.The utility model changes flying shear casing distribution stage gear engagement system, has realized simple in structurely, processes easy for installation and the gap is controlled.
The technical scheme that the utility model adopts is:
In cutting the body casing with cut the distribution stage gear employing helical gear that axle links to each other; Second driven gear, 8, the three driven gears 10 on driving gear 6 and the driven axle mesh simultaneously, have one to adjust pad 9 between two driven gears.The big or small δ of the meshing backlass between the gear can adjust by the thickness of reconditioning (or increasing) adjustment pad 9.
Two driven gears are equal strength helical gears, and tooth profile parameter is identical, and each gear all can bear moment of accelerating, shearing moment and the braking moment of flying shear separately.
The alignment pin 12 that is equipped with between two driven gears, the adjustment pad.Two driven gears can only be in the variation that relative position axially takes place when having guaranteed the adjustment of sideshake like this, and remains unchanged at circumferential relative position.
Between two driven gears, the adjustment pad axial pretightening device 11(such as bolt or double-screw bolt connection etc. are arranged), when alignment pin 12 is circumferentially located, two driven gears are put together on firmly vertically becomes a gear together, and can bear because the stressed caused axial force of helical teeth.
The blank of two driven gears is fixed into an integral body and goes out endoporus, keyway and external tooth by the processing technology time processing of a gear with alignment pin and axial locking device after roughing.
When flying shear started, shearing moment was born by one of them driven gear, sheared the back braking moment that finishes and was born by another driven gear.Because flying shear starts and braking moment is similar, therefore two driven gears have been made into the equal strength gear, and its tooth profile parameter is the same, and the facewidth is the same, and forms as a gear time processing.Between two driven gears the adjustment pad is arranged, the gear backlash numerical value according to the gear actual measurement when assembling carries out grinding to the thickness of adjusting pad.Because the existence of pin is arranged between two driven gears, and adjusting pad can only change two axial distances between driven gear, and can not change at circumferential relative position.Owing to adopt helical teeth, two gear shafts to the variation of relative position can cause the flank profil of two driven gears that small dislocation is arranged, the flank profil that is equivalent to driven gear has broadened, sideshake is also just little when therefore meshing with the driving gear teeth groove.
After adopting this scheme, start in the shear history at flying shear, the one side of driving gear teeth groove can be transmitted the shearing moment of torsion because contacting with the flank of one of them driven gear; And after shearing finished, the another side of driving gear teeth groove can transmit braking moment because contacting with the flank of another driven gear.Because two driven gears are equicohesive and can bear load in the work separately, guaranteed it no matter is to shear and can both effectively guarantee the stable of blade clearance during braking.Behind odontotripsis, can or change pad gear backlash is adjusted again by the grinding pad.
The utility model is described in further detail below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the composition schematic diagram of traditional flying shear.Wherein, motor 1, flywheel 2, gear-box 3, cut arm 4, cutting edge 5.
Fig. 2 is the gear structure figure of traditional flying shear.Wherein, driving gear 6, first driven gear 7.
Fig. 3 is the gear structure figure in the utility model.Wherein, second driven gear 8, adjustment pad 9, the 3rd driven gear 10, pre-tightening apparatus 11, alignment pin 12.
When Fig. 4 start to shear for the utility model flying shear during gear, driving gear shown in Fig. 36 and second driven gear engagement figure.
When Fig. 5 brakes for the utility model flying shear, the engagement figure of driving gear shown in Fig. 36 and the 3rd driven gear 10.
Fig. 6 is the teeth directional engagement figure of the utility model Fig. 3.
Fig. 7 is the not processing technology schematic diagram of driven gear during shimming of the utility model.
The processing technology schematic diagram of driven gear when Fig. 8 is the utility model shimming.
The specific embodiment
The utility model changes distribution stage gear engagement system in the flying shear casing, provides a kind of simple in structure, processes flying shear easy for installation and that the gap is controlled.
In order to make those skilled in the art person understand the utility model scheme better, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
As Fig. 2, the distribution stage gear generally adopts helical gear (or spur gear) to carry out transmission in traditional gear-box 3.As Fig. 3, the utility model is that the distribution stage gear in the gear-box 3 is changed: the distribution stage gear all adopts helical gear, 6 whiles of driving gear on the driving shaft are meshed with second driven gear 8 and the 3rd driven gear 10 on the driven axle, have one to adjust pad 9 between two driven gears, the big or small δ of the meshing backlass between the gear can adjust by the thickness H of reconditioning (or increasing) adjustment pad 9.
Because flying shear starts and braking moment is similar, therefore two driven gears have been made into equicohesive helical gear, its tooth profile parameter is the same, the facewidth is the same and form as a gear time processing, they are circumferentially being fixed by alignment pin 12, carry out axial restraint by axial locking device 11.
The processing of second driven gear 8 and the 3rd driven gear 10 is crucial parts of the present utility model.The processing of second driven gear 8 and the 3rd driven gear 10 can be adopted dual mode:
1) blank of two driven gears is fixed into an integral body and goes out endoporus, keyway and external tooth by the processing technology time processing of a gear with alignment pin 12 and axial locking device 11 after roughing, as Fig. 7, shown in Figure 8.When Installation and Debugging, between two driven gears, increase one according to the gear backlash detected value and adjust pad 9.
2) after second driven gear 8 and 10 roughing of the 3rd driven gear, increase betwixt earlier and adjust pad 9, with alignment pin 12 and axial locking device 11 second driven gear 8 and the 3rd driven gear 10, adjustment pad 9 are fixed into the cutting that an integral body is carried out tooth more then.Detected value according to gear backlash when Installation and Debugging carries out grinding to adjusting pad 9, as shown in Figure 7.
No matter adopt above which kind of processing technology, owing to the reason that adopts helical teeth, two gear shafts to the variation of relative position can cause the flank profil of two driven gears that small dislocation (as shown in Figure 7) is arranged, the flank profil that is equivalent to driven gear has broadened, and sideshake is also just little when therefore meshing with the driving gear teeth groove.As shown in Figure 6, after adjusting pad 9 adjustment, the flank of tooth A of driving gear 6 contacts with the flank of tooth a of second driven gear 8, and the flank of tooth B of driving gear 6 contacts with the flank of tooth b of the 3rd driven gear 10.In flying shear acceleration and shear history, shear torque by the transmission of A-a face, as shown in Figure 4; Transmit braking moment by the B-b face during braking, as shown in Figure 5, adjusting gear backlash by pad in theory can be close to zero.
This flying shear has increased equicohesive driven gear in gear-box, come the control gear sideshake by adjusting driving gear and driven gear axial distance, effectively control and reduced the flying shear blade gap, improve shearing quality, improved manufacturing, installation, the use of equipment, the convenience of maintenance simultaneously.
The flying shear of this mode goes for carrying out in the rolling field of long material crop, back-end crop, cataclasm, flying shear that finished product is sheared, is specially adapted to require shearing quality and the higher finished product flying shear of precision.
More than the controlled flying shear of a kind of blade clearance provided by the utility model is described in detail.Herein the blade clearance control mode of this kind flying shear is set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (4)
1. flying shear that blade clearance is controlled is characterized in that: in the flying shear casing with cut the distribution stage gear employing helical gear that axle links to each other; Driving gear (6) is meshed with second driven gear (8), the 3rd driven gear (10) on the driven axle simultaneously, has one to adjust pad (9) between two driven gears.
2. the controlled flying shear of a kind of blade clearance according to claim 1, it is characterized in that: two driven gears are equal strength helical gears, two form of gear tooth parameters are identical.
3. the controlled flying shear of a kind of blade clearance according to claim 1 is characterized in that: the alignment pin (12) that is equipped with between two driven gears, the adjustment pad.
4. the controlled flying shear of a kind of blade clearance according to claim 1 is characterized in that: between two driven gears, the adjustment pad axial pretightening device (11) is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320016962 CN203061959U (en) | 2013-01-13 | 2013-01-13 | Flying shear with controllable shear edge backlashes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320016962 CN203061959U (en) | 2013-01-13 | 2013-01-13 | Flying shear with controllable shear edge backlashes |
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| Publication Number | Publication Date |
|---|---|
| CN203061959U true CN203061959U (en) | 2013-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320016962 Expired - Lifetime CN203061959U (en) | 2013-01-13 | 2013-01-13 | Flying shear with controllable shear edge backlashes |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742635A (en) * | 2013-12-20 | 2014-04-23 | 柳州正菱集团有限公司 | Method and device for realizing zero side play of flying shear gear box |
| CN106536106A (en) * | 2014-07-03 | 2017-03-22 | 法孚斯德姆斯公司 | Shearing device |
| CN106670565A (en) * | 2017-03-24 | 2017-05-17 | 北京京诚之星科技开发有限公司 | Flying shear with double-side gear transmission |
| CN107420193A (en) * | 2016-04-26 | 2017-12-01 | 福特环球技术公司 | The diesel fuel jet pump of the gear driving of engine |
| CN108581032A (en) * | 2018-06-15 | 2018-09-28 | 江苏赫夫特齿轮制造有限公司 | Three cutter heads turn round flying shearing machine |
| CN113059232A (en) * | 2021-03-31 | 2021-07-02 | 南京鼎胜冶金机械有限公司 | Rod multiple-length flying shear control method and device |
-
2013
- 2013-01-13 CN CN 201320016962 patent/CN203061959U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742635A (en) * | 2013-12-20 | 2014-04-23 | 柳州正菱集团有限公司 | Method and device for realizing zero side play of flying shear gear box |
| CN106536106A (en) * | 2014-07-03 | 2017-03-22 | 法孚斯德姆斯公司 | Shearing device |
| CN107420193A (en) * | 2016-04-26 | 2017-12-01 | 福特环球技术公司 | The diesel fuel jet pump of the gear driving of engine |
| CN107420193B (en) * | 2016-04-26 | 2021-09-03 | 福特环球技术公司 | Gear-driven diesel fuel injection pump for an engine |
| CN106670565A (en) * | 2017-03-24 | 2017-05-17 | 北京京诚之星科技开发有限公司 | Flying shear with double-side gear transmission |
| CN108581032A (en) * | 2018-06-15 | 2018-09-28 | 江苏赫夫特齿轮制造有限公司 | Three cutter heads turn round flying shearing machine |
| CN113059232A (en) * | 2021-03-31 | 2021-07-02 | 南京鼎胜冶金机械有限公司 | Rod multiple-length flying shear control method and device |
| CN113059232B (en) * | 2021-03-31 | 2023-12-12 | 江苏锋宝冶金设备有限公司 | Bar length-doubling flying shear control method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130717 |
|
| CX01 | Expiry of patent term |