CN102825515A - Machining method of high-accuracy cutter shaft of rotary shear - Google Patents
Machining method of high-accuracy cutter shaft of rotary shear Download PDFInfo
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- CN102825515A CN102825515A CN2012103006049A CN201210300604A CN102825515A CN 102825515 A CN102825515 A CN 102825515A CN 2012103006049 A CN2012103006049 A CN 2012103006049A CN 201210300604 A CN201210300604 A CN 201210300604A CN 102825515 A CN102825515 A CN 102825515A
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Abstract
The invention discloses a machining method of a high-accuracy cutter shaft of a rotary shear. The machining method is sequentially performed according to the following steps of: 1, forging a blank and normalizing; 2, performing rough turning; 3, performing hardening and tempering, i.e., performing quenching and high-temperature tempering treatment on the cutter shift; 4, performing semi-fine turning; 5, performing semi-fine milling; 6, performing fine turning; and 7, performing fine milling, i.e., milling a main outer circle and a taper of the cutter shaft, and meanwhile, arranging a groove in a middle part of an axial end face of a milling grinding wheel, wherein a part which is clamped between the groove and the circumferential surface of the grinding wheel is a milling part of the grinding wheel, so that the milling part of the grinding wheel in a rotation process is used for milling an end face of a cutter shaft shoulder which is kept in the rotation process after being clamped on a machine tool, and the grinding wheel does reciprocating motion in the radial direction of the cutter shaft in a milling process. According to the machining method, a contact area of the grinding wheel and the shaft shoulder can be reduced, jumping of a grinding wheel and aggravation of jumping of the shaft by resonance of an end face of the shaft shoulder and the grinding wheel in a milling process are prevented, and the milling accuracy of the axial end face is guaranteed to be within 0.005 mum.
Description
Technical field
The present invention relates to the Machining Technology field, be specifically related to a kind of processing method of circle shear high accuracy cutter shaft.
Background technology
Circle shear is arranged on the finishing line usually, and most of cold-rolling process line all adopts circle shear that moving band steel longitudinal edge is trimmed or be cut into ribbon steel, removes strip edge portion and lacks the danger.Rotational shear campaign through last bottom knife is to obtain accurate steel plate width and good limit portion is shaped.The rotary shear equipment precision is high; The steel plate that is used to shear is thinner; The gap of scissors is about 0.02mm, if to be 0.01mm. shear history intermediate gap too big or the gap is inhomogeneous for the cutterhead end face run-out, insert end faces is beated and will be occurred too greatly that shearing area can't cut, steel plate deformed; Steel plate such as pulls at defective; Therefore have a strong impact on the quality of steel plate, machining accuracy and the assembly precision to the cutter shaft of device blade proposed very high requirement (see Fig. 1, illustrated the required precision of each significant points of cutter shaft among Fig. 1).The domestic main dependence on import of circle shear cutter shaft costs an arm and a leg at present, is restricting the development of the metallurgical industry of China.The technological process of tradition processing circle shear cutter shaft is: forging blank (normalizing)-rough turn-modified-half finish turning-half correct grinding-finish turning-correct grinding-check.
There is following problem and shortage in above-mentioned technology:
1. owing to properties of materials, product is difficult to guarantee the stability of centre bore benchmark in process.Owing to need repeatedly carry out the different processes flow process, walking about of benchmark very easily causes product rejection.
2. in Grinding Process, the processing that product end surface is beated is unstable, owing to receive the influence of grinder wheel, the side is leaned on when grinding and is prone to cause beating of emery wheel, thereby causes the required precision of the product 0.005um (see figure 2) that can't be protected.
3. the processing of tapering mainly relies on numerical control turning and grinding machine to guarantee.In process,, need the axial force of regular adjustment tailstock thimble because centre bore is big or small and the influence of length.Also need in addition through repeatedly adjusting the accuracy of mesh that machine tool guideway guarantees tapering.Be difficult to form mass production, inefficiency, and be easy to generate and scrap.
4. conventional tapering measuring means needs more rich experience, and is bigger to the percentage evaluation difficulty of the field of conjugate action.Be unfavorable for producing high-precision product.
So it is imperative to develop the process technology of circle shear high accuracy cutter shaft.
Summary of the invention
The axial end method for grinding that the purpose of this invention is to provide a kind of shaft shoulder; The present invention can reduce the contact area of the emery wheel and the shaft shoulder; The resonance that prevents Grinding Process axis shoulder end face and emery wheel is beated emery wheel and is aggravated beating of axle, ensures that the axial end grinding accuracy is in 0.005um.
The technical scheme that realizes the object of the invention is following:
The axial end method for grinding of the shaft shoulder; Middle part at the axial end of emery wheel is provided with groove; The part that is sandwiched between groove to the emery wheel side face is the milled portion of emery wheel; The milled portion that makes the emery wheel in the rotation process is carried out grinding to the end face that clamping is in the shaft shoulder of rotation process axis after on the lathe, in grinding process, makes the radially reciprocating motion of emery wheel along axle.
Axle carried out in this first centre bore, assembling a frock piece with the mode of welding or interference after grinding or finish turning handle to first centre bore of axle one end before being clamped on the lathe, and second centre bore of the axle other end is carried out Quenching Treatment.
Groove on the emery wheel is an annular groove, and the vertical range between the side face of emery wheel and the inner ring surface of groove is more than or equal to the height of 15 times of shaft shoulder.
The distance of said emery wheel upper groove and milled portion axial end is 1-2mm.
Another object of the present invention provides a kind of processing method of circle shear high accuracy cutter shaft; The present invention can reduce the contact area of the emery wheel and the shaft shoulder; The resonance that prevents Grinding Process axis shoulder end face and emery wheel is beated emery wheel and is aggravated beating of axle, ensures that the axial end grinding accuracy is in 0.005um.
A kind of processing method of circle shear high accuracy cutter shaft, carry out according to the following steps successively:
Step 1, forging blank and normalized treatment; Blank carries out normalized treatment after forging molding is cutter shaft;
Step 2, rough turn: adopt the cylindrical on the engine lathe turning cutter shaft;
Step 3, modified: cutter shaft is quenched and the high tempering processing;
Step 4, half finish turning: adopt engine lathe or numerically controlled lathe size;
Step 5, half correct grinding: adopt general-purpose grinder grinding cylindrical;
Step 6, finish turning: cutted thread and fine finishining circular cone cylindrical on engine lathe or numerically controlled lathe;
Step 7, correct grinding: the cylindrical of grinding cutter shaft and tapering; While is provided with groove at the middle part of the emery wheel axial end of grinding; The part that is sandwiched between groove to the emery wheel side face is the milled portion of emery wheel; Make the milled portion of the emery wheel in the rotation process carry out grinding, in grinding process, make the radially reciprocating motion of emery wheel along cutter shaft to the end face that is in the cutter shaft shaft shoulder in the rotation process after clamping is on lathe.
Before after step 5 is accomplished, carrying out the finish turning step of step 6; Also comprise processing: the smart benchmark after utilizing half to finish grind to the cutter shaft centre bore; First centre bore of cutter shaft one end is carried out after grinding or finish turning handle; In this first centre bore,, second centre bore of the cutter shaft other end is carried out Quenching Treatment with welding or the fixing frock piece of the mode of interference.
Said frock piece comprises first connector, and an end of this first connector is provided with guide way, and the other end of first connector is connected with one second connector.
Said frock piece is the frock piece through Quenching Treatment.
Groove on the emery wheel is an annular groove, and the vertical range between the side face of emery wheel and the inner ring surface of groove is more than or equal to the height of 15 times of shaft shoulder.
The distance of said emery wheel upper groove and milled portion axial end is 1-2mm.
In the correct grinding process of step 7,, adjust and check the accuracy of mesh of grinding machine precision and cutter shaft tapering through adopting and the isometric length bar of cutter shaft.
Adopted such scheme, in grinding process, owing to be provided with the cause of groove; So have only milled portion to contact with the axial end of the shaft shoulder; Can reduce the contact area of the emery wheel and the shaft shoulder, and make the radially reciprocating motion of emery wheel along axle, the resonance that prevents Grinding Process axis shoulder end face and emery wheel is beated emery wheel and is aggravated beating of axle; Avoid processing unstability, thereby grinding method of the present invention can ensure that machining accuracy is in 0.005um.Through grinding, improve the roughness and the uniformity of centre bore benchmark in addition to centre bore.Simultaneously,, be difficult for causing plucking, influence the precision of benchmark because centre bore has obtained cure process.The axle clamping has solved the uniformity of axial workpiece benchmark after on the lathe, and centre bore adopts the mode of quenching and grinding, and improves baseline stability, has guaranteed the axiality at axle two ends, and the raising of machining accuracy is had very great help.
In sum, the present invention has following advantage:
1, adopts the grinding method of broaching tool formula, guaranteed that product end surface beats.
2, through adopting and the isometric length bar of product, adjust and check the accuracy of mesh of grinding machine precision and product tapering.Carry out the quantification production of tapering, improved production efficiency.Avoid in the process of tapering the axial force of regular adjustment tailstock thimble.Also need not repeatedly to adjust the accuracy of mesh that machine tool guideway guarantees tapering in addition.
3, solved the uniformity of axial workpiece benchmark, centre bore adopts the mode of quenching and grinding, and has fixed the frock piece, improves baseline stability, has guaranteed the product axiality.
4, constant product quality can be carried out the organization of production that quantizes.
Description of drawings
Fig. 1 is the sketch map of the required precision of each significant points on the cutter shaft;
Fig. 2 is to the sketch map of shaft shoulder grinding method in the prior art;
Fig. 3 adopts the shaft shoulder processing sketch map of emery wheel to axle for the present invention;
Fig. 4 is the sketch map of the working position of circle shear high accuracy cutter shaft of the present invention;
Fig. 5 is the structural representation of frock piece of the present invention;
Fig. 6 is that the A of Fig. 4 is to view.
The specific embodiment
With reference to Fig. 3; The axial end method for grinding of the shaft shoulder of the present invention; Axle 100 is provided with the shaft shoulder 101; Middle part at the axial end of emery wheel 200 is provided with groove 201, and the groove on the emery wheel is an annular groove, and the vertical range H between the inner ring surface of the side face of emery wheel 200 and groove 201 is more than or equal to the height of 15 times of shaft shoulder 101.The distance L of said emery wheel upper groove and milled portion axial end is 1-2mm.The part that is sandwiched between groove 201 to the emery wheel side face is the milled portion 202 of emery wheel; The milled portion that makes the emery wheel in the rotation process is carried out grinding to the end face that clamping is in the shaft shoulder of rotation process axis after on the lathe; In grinding process; Make the radially reciprocating motion of emery wheel along axle 100, promptly with the broaching tool mode to shaft shoulder grinding.In grinding process; Owing to be provided with the cause of groove 201,, reduce the contact area of the emery wheel and the shaft shoulder 101 so have only milled portion 202 to contact with the axial end of the shaft shoulder; And make the radially reciprocating motion of emery wheel along axle 100; The resonance that prevents Grinding Process axis shoulder end face and emery wheel is beated emery wheel and is aggravated beating of axle, avoid processing unstability, thereby grinding method of the present invention can ensure that machining accuracy is in 0.005um.
With reference to Fig. 4, the processing method of circle shear high accuracy cutter shaft of the present invention, carry out according to the following steps successively:
Step 1, forging blank and normalized treatment; Blank carries out normalized treatment, Hardness Control≤228HB after forging molding is cutter shaft.
Step 2, rough turn: adopt the cylindrical 1-13 on the engine lathe turning cutter shaft, surplus control 6mm, circularity reaches 0.2, and roughness reaches Ra6.3um.
Step 3, modified: cutter shaft is quenched and the high tempering processing; Control hardness is at HRC26-32.
Step 4, half finish turning: adopt engine lathe or the numerically controlled lathe size 1,3,4,6,7,8,10,11,12,13 and first centre bore 15; Stay the 1.2mm grinding allowance.The axiality in control centre hole requires in 0.02.
Step 5, half correct grinding: adopt general-purpose grinder grinding cylindrical 1,3,4,6,8,11,12,13; Made allowance 0.6mm-0.7mm, benchmark cylindrical 4,8 axialities require to reach 0.005, and roughness reaches Ra0.8-1.2um.
Step 6, finish turning: cutted thread 7,10 and fine finishining circular cone cylindrical 5,9 on engine lathe or numerically controlled lathe; Screw thread and circular cone axiality to foreign round reach in the 0.1mm roughness Ra1.6um.
Step 7, correct grinding: the main cylindrical of grinding cutter shaft and tapering 1,3,4,6,8,11,12,13; While is provided with groove at the middle part of the emery wheel axial end of grinding; The part that is sandwiched between groove to the emery wheel side face is the milled portion of emery wheel; Groove on the emery wheel is an annular groove, and the vertical range between the side face of emery wheel and the inner ring surface of groove is more than or equal to the height of 15 times of shaft shoulder.The distance of said emery wheel upper groove and milled portion axial end is 1-2mm.Make the milled portion of the emery wheel in the rotation process carry out grinding, in grinding process, make the radially reciprocating motion of emery wheel along cutter shaft to the end face that is in the cutter shaft shaft shoulder 14 in the rotation process after clamping is on lathe.In the correct grinding process of step 7,, adjust and check the accuracy of mesh of grinding machine precision and cutter shaft tapering through adopting and the isometric length bar of cutter shaft.
Before after step 5 is accomplished, carrying out the finish turning step of step 6; Also comprise processing: the smart benchmark after utilizing half to finish grind to the cutter shaft centre bore; First centre bore 15 of cutter shaft one end is carried out after grinding or finish turning handle; In this first centre bore 15,, second centre bore 17 of the cutter shaft other end is carried out Quenching Treatment with welding or the fixing frock piece 16 of the mode of interference.Said frock piece 16 is the frock piece through Quenching Treatment.Said frock piece comprises the first connector 16a; One end of this first connector is provided with guide way 16b; The other end that guide way 16b is used for being inserted into first centre bore, 15, the first connector 16a is connected with one second connector 16c, and the second connector 16c is used for being connected with the top of lathe.On the axial end of the first connector 16a, also be provided with dowel hole 16d; Set screw hole 16e and knockout screw hole 16f; When being used for initial cutter shaft and connecting,, through screw frock piece and cutter shaft are fixed when set screw hole 16e is used for fastening cutter shaft dowel hole 16d through the location of pin to frock piece and cutter shaft.Knockout screw hole 16f adopts screw that both are separated when the fixed connection of dismounting frock piece and cutter shaft, and the advantage of being convenient to make frock piece and cutter shaft dismounting is arranged.
Claims (10)
1. the axial end method for grinding of the shaft shoulder; It is characterized in that; Middle part at the axial end of emery wheel is provided with groove, and the part that is sandwiched between groove to the emery wheel side face is the milled portion of emery wheel, and the milled portion that makes the emery wheel in the rotation process is carried out grinding to the end face that clamping is in the shaft shoulder of rotation process axis after on the lathe; In grinding process, make the radially reciprocating motion of emery wheel along axle.
2. according to the axial end method for grinding of the said shaft shoulder of claim 1; It is characterized in that; Axle is before being clamped on the lathe; First centre bore (15) of axle one end is carried out in this first centre bore (15), assembling a frock piece with the mode of welding or interference after grinding or finish turning handle, second centre bore of the axle other end is carried out Quenching Treatment.
3. according to the axial end method for grinding of the said shaft shoulder of claim 1, it is characterized in that the groove on the emery wheel is an annular groove, the vertical range between the side face of emery wheel and the inner ring surface of groove is more than or equal to the height of 15 times of shaft shoulder.
4. according to the axial end method for grinding of the said shaft shoulder of claim 1, it is characterized in that the distance of said emery wheel upper groove and milled portion axial end is 1-2mm.
5. the processing method of a circle shear high accuracy cutter shaft is characterized in that, carries out according to the following steps successively:
Step 1, forging blank and normalized treatment; Blank carries out normalized treatment after forging molding is cutter shaft;
Step 2, rough turn: adopt cylindrical (1)-(13) on the engine lathe turning cutter shaft;
Step 3, modified: cutter shaft is quenched and the high tempering processing;
Step 4, half finish turning: adopt engine lathe or numerically controlled lathe size (1), (3), (4), (6), (7), (8), (10), (11), (12), (13) and first centre bore (15);
Step 5, half correct grinding: adopt general-purpose grinder grinding cylindrical (1), (3), (4), (6), (8), (11), (12), (13);
Step 6, finish turning: cutted thread on engine lathe or numerically controlled lathe (7), (10) and fine finishining circular cone cylindrical (5), (9);
Step 7, correct grinding: the cylindrical of grinding cutter shaft and tapering (1), (3), (4), (6), (8), (11), (12), (13); While is provided with groove at the middle part of the emery wheel axial end of grinding; The part that is sandwiched between groove to the emery wheel side face is the milled portion of emery wheel; Make the milled portion of the emery wheel in the rotation process carry out grinding to the end face that is in the cutter shaft shaft shoulder in the rotation process after clamping is on lathe; In grinding process, make the radially reciprocating motion of emery wheel along cutter shaft.
6. the processing method of circle shear high accuracy cutter shaft according to claim 5; It is characterized in that; The finish turning that after step 5 is accomplished, carries out step 6 also comprised the processing to the cutter shaft centre bore before the step: utilize the smart benchmark behind half correct grinding, first centre bore (15) of cutter shaft one end is carried out after grinding or finish turning handle; In this first centre bore (15),, second centre bore of the cutter shaft other end is carried out Quenching Treatment with welding or the fixing frock piece of the mode of interference.
7. the processing method of circle shear high accuracy cutter shaft according to claim 6 is characterized in that, said frock piece comprises first connector, and an end of this first connector is provided with guide way, and the other end of first connector is connected with one second connector.
8. the processing method of circle shear high accuracy cutter shaft according to claim 5 is characterized in that, the groove on the emery wheel is an annular groove, and the vertical range between the side face of emery wheel and the inner ring surface of groove is more than or equal to the height of 15 times of shaft shoulder.
9. the processing method of circle shear high accuracy cutter shaft according to claim 5 is characterized in that, the distance of said emery wheel upper groove and milled portion axial end is 1-2mm.
10. the processing method of circle shear high accuracy cutter shaft according to claim 5 is characterized in that, in the correct grinding process of step 7, through adopting and the isometric length bar of cutter shaft, adjusts and check the accuracy of mesh of grinding machine precision and cutter shaft tapering.
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| CN201210300604.9A CN102825515B (en) | 2012-08-23 | 2012-08-23 | Machining method of high-accuracy cutter shaft of rotary shear |
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| CN112676630A (en) * | 2020-11-17 | 2021-04-20 | 刘旭 | Carbon deposition-resistant and cracking-resistant thermal expansion knife handle and manufacturing method thereof |
| CN114193094A (en) * | 2021-12-08 | 2022-03-18 | 江苏特贝尔精密机械科技有限公司 | Machining process of ultrahigh precision main shaft |
| CN114193094B (en) * | 2021-12-08 | 2023-08-15 | 江苏特贝尔精密机械科技有限公司 | Processing technology of ultra-high precision spindle |
| CN114789259A (en) * | 2022-06-09 | 2022-07-26 | 洛阳新强联回转支承股份有限公司 | Tapered roller machining method for tapered roller bearing of high-power wind driven generator |
| CN114918624A (en) * | 2022-06-09 | 2022-08-19 | 洛阳新强联回转支承股份有限公司 | Roller processing method for three-row cylindrical roller wind power main shaft bearing |
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