CN105441789B - Large circular knife and manufacturing method thereof - Google Patents
Large circular knife and manufacturing method thereof Download PDFInfo
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- CN105441789B CN105441789B CN201610022400.1A CN201610022400A CN105441789B CN 105441789 B CN105441789 B CN 105441789B CN 201610022400 A CN201610022400 A CN 201610022400A CN 105441789 B CN105441789 B CN 105441789B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/04—Hardening by cooling below 0 degrees Celsius
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/18—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for knives, scythes, scissors, or like hand cutting tools
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
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Abstract
The invention discloses a large circular knife and a manufacturing method thereof, belongs to the field of circular knives, and solves the problems of low flatness, uneven hardness, a short service life and a high production rejection rate in a current large circular knife production process. The manufacturing method for the large circular knife comprises the following thermal treatment steps: normalizing, horizontally charging the large circular knife subjected to rough machining for heating; hitting the surface of the large circular knife; cooling the large circular knife to the room temperature; normalizing; carrying out oil quenching after heating; leveling by use of a press; fixing by use of a clamp; tempering; carrying out subzero treatment; and checking. The method disclosed by the invention can improve the flatness of the large circular knife and can increase the product qualified rate, so that the service life of the product is long, and the purposes of saving the production cost and improving the production efficiency can be achieved.
Description
Technical field
The invention belongs to dise knife field, more specifically to a kind of big dise knife and its manufacture method.
Background technology
Circular knife, i.e. circular shear blade.The circular shape of profile, general circular knife is applied in plant equipment, mainly cuts,
The machining functions such as deburring.Circular knife generally all has interstitial hole, it is therefore an objective to it can be made to be fixed in plant equipment, so as to reach
Cutting function.It is dentation (flat tooth, pointed tooth, irregular dentation) wherein also to have many money circular blade edges, the edge of a knife put the first edge on a knife or a pair of scissors have it is two-sided,
One side, do not put the first edge on a knife or a pair of scissors three kinds.Big dise knife is one kind of circular knife, because its diameter is bigger relative to general circular knife, therefore is referred to as
Big dise knife.Big dise knife is generally used for the pipelines such as tubulation production line, cutting paper tube, steel pipe, copper pipe, aluminum pipe；The diameter one of big dise knife
As more than half meter, and typically only several millimeters of thickness, due to the combination of this major diameter and ultrathin so that big dise knife exists
Various defects occur in production process, most important of which defect is mainly manifested in big dise knife surface irregularity, flatness
It is poor, and used as a kind of cutting tool, the height direct relation of flatness cutting accuracy and cutting efficiency, so flatness
Problem not high is urgent problem during big dise knife is manufactured.To solve the problem, prior art is typically used
Forcing press carries out pressing treatment to big dise knife workpiece, but this method is easily caused workpiece cracking, and scrappage is high.
Chinese Patent Application No. 201510400137.0, publication date in September, 2015 patent application document of 30 days, discloses
A kind of flat round knife and its manufacture method, belong to tool sharpening field.The flat round knife of the invention includes centre bore, cutterhead and blade,
Centre bore is located at the center of cutterhead, and blade is located on the outer shroud of cutterhead, and the outer shroud of blade is provided with edge, described edge
Blade angle δ be 13~18 °, cutterhead is provided with screwed hole and mounting hole.The flat round knife of the invention is constituted using special elementses
Alloy material under the process conditions of strict control by rough forging, isothermal spheroidizing, preliminary working, heat treatment, corase grind
And the manufacture of the step such as smoothing, tempering, deep processing is obtained, and has very strong anti-wear performance in the case where sharpness requirement is met,
Long service life, wear extent is small after a long time use for edge, does not burst apart.The patent application publication dise knife piece making method can
With suitable for the less circular knife of diameter, and be applied to diameter with thickness difference than larger dise knife when, then easily there is flatness
Difference, the phenomenon of surface irregularity, and in order to improve flatness, processed using general forcing press pressing, product conjunction certainly will be reduced
Lattice rate, wastes substantial amounts of production cost.
Further, since big dise knife can produce thermal deformation in normal use, if its hardness is uneven, and (existing big dise knife is hard
Degree is general in HRC30~55), it is easy to temperature distortion, and can only scrap treatment when deforming serious, and service life is very low.
The content of the invention
1st, the problem to be solved
Easily occur that flatness is low, hardness is uneven for existing big dise knife production process, service life is short, manufacturing scrap
Rate problem high, the present invention provides a kind of big dise knife and its manufacture method, can improve the flatness of big dise knife, while improving product
Qualification rate, long product lifecycle can reach saving production cost, the purpose of improve production efficiency.
2nd, technical scheme
To solve the above problems, the present invention is adopted the following technical scheme that.
A kind of great circle cutter manufacturing method, including following heat treatment step：
1) normalizing, by roughing after the completion of the horizontal shove charge of big dise knife be heated to 860~900 DEG C, heating coefficient 1.4~
1.6min/mm, comes out of the stove after 8~10min of insulation；
2) by step 1) in come out of the stove after big dise knife be placed on metal platform, big dise knife surface n is impacted using metal hammer flattener
Secondary, n is rounded equal to ε * D* (S/s), wherein ε be big dise knife material Poisson's ratio 1/10th, D be big dise knife thickness, unit
It is mm, S is big dise knife surface area, and s is the area of metal hammer flattener impact surface；Big dise knife is overturn, big another surface n of dise knife is impacted
It is secondary；
3) normalizing, by step 2) the big dise knife after impact is put into 720 DEG C of batch-type furnace inside holding 2h, then stove be cooled to 500 DEG C with
Under, come out of the stove；
4) by step 3) in come out of the stove after big dise knife smoothed with forcing press；
5) by step 4) in smoothing after big dise knife be cooled to room temperature, fixed with fixture；
6) be tempered, by step 5) fixed with fixture after big dise knife shove charge be heated to 190~210 DEG C, heating coefficient 1.4~
1.6min/mm, is incubated 2h, comes out of the stove, and is cooled to room temperature；
7) quench, by step 6) in be cooled to the horizontal shove charge of big dise knife after room temperature and be heated to 860~900 DEG C, heating system
1.4~1.6min/mm of number, comes out of the stove after 3~5min of insulation, and vertical immersion oil is cooled to 130~150 DEG C of taking-ups；
8) deep cooling, by step 7) in the big dise knife that takes out be cooled to after room temperature be put into cold treatment stove deep cooling to -120~-
140 DEG C, after insulation 4h, it is warming up to -25~-35 DEG C and comes out of the stove；
9) by step 8) in come out of the stove after big dise knife be warming up to after room temperature and taken out from fixture, verification；
Described big dise knife raw material use hot rolled plate, and its Ingredient percent is C：0.60~0.70%, Si：0.11
~0.37%, Mn：0.90~1.20%, S≤0.035%, P≤0.035%, Cr≤0.25%, Ni≤0.25%, Cu≤
0.25%, balance of Fe.
Preferably, described step 2) in metal platform surface roughness and metal hammer flattener impact surface rough surface
It is 0.8~Ra of Ra 1.6 to spend；The hardness of the case hardness of metal platform and the impact surface of metal hammer flattener is 56~60HRC.
Preferably, described step 2) in the dynamics F=KD that impacts each time, wherein K takes 90~100N/mm.
Preferably, described step 4) in the forcing press pressure that uses of smoothing be 100t.
Preferably, described step 7) in hardening media be 32# machine oil.
Preferably, described step 1), 7) in heating stove be the box resistive band stoves of 90kw；Described step 6) middle tempering
Equipment is 90kw air circulation resistive band stoves；Described step 8) in cold treatment stove be 0~-196 DEG C of subzero treatment stoves.
Preferably, also including roughing step before heat treatment：1) plasma wire cutting is switched to semi-finished dimensions；2) drilling or
Tooth punching；3) flash removed is removed, material crack, interlayer defect is checked.
A kind of big dise knife, is made of the above method.
3rd, beneficial effect
Compared to prior art, beneficial effects of the present invention are：
(1) the big dise knife after the method for the present invention is by roughing carries out normalized treatment first, can play the big dise knife of elimination
The machining stress that semi-finished product are produced in roughing；After normalized treatment is come out of the stove, according to big dise knife thickness, surface area parameters to great circle
Knife surface carries out the impact of quantitative number of times, and the big dise knife inner integument body of light after can making roughing within the shortest time is added some points shape pearly-lustre
Body tissue is maximized and changes into the pearlitic structrure that grain size is 2.5~6 grades, more preferable crystal grain thinning, eliminates big dise knife hair
The defect such as cast condition of the base in smelting process is loose, optimizes heterogeneous microstructure；Quantification impact improves production efficiency, saves
Time, reduce labour intensity；Further, it is preferable to impact dynamics of the present invention is also adopted by quantification setting, can further carry
Height impact efficiency, reduces the waste of unnecessary time and labour, reaches the optimization of resources alocation；
(2) machining stress is produced through the big dise knife after impact in the method for the present invention, is that this is disappeared using normalising step again
Except its machining stress, optimize its microstructure；
(3) method of the present invention uses forcing press smoothing process again after impact, normalizing, then big dise knife can be made successfully to avoid
The cracking occurred during smoothing, reduces scrappage, improves big dise knife quality；
(4) method of the present invention tempering after carry out subzero treatment again, make its original tempered martensite plus 8%~
20% retained austenite tissue is fully changed into high strength martensitic tissue, fully eliminates residualinternal stress, reduces finished product big
It is heated when dise knife is used yielding and problem of Cracking generation；
(5) the big dise knife hardness that the inventive method makes increased 2~3HRC, increased its overall wear resistance；Use the longevity
Life extends 8~10 times；
(6) big dise knife is fixed using fixture in the inventive method, it is ensured that big dise knife after forcing press smoothing not
Deform bounce-back；
(7) the inventive method improves yield rate, shortens and is smoothing the technologic time, improves production efficiency；System
Into the cleaved experiment of big dise knife after show, performance is more excellent, and quality is more preferably.
Brief description of the drawings
Fig. 1 is the structural representation of product of the present invention；
Fig. 2 is the side view of Fig. 1；
In figure：1st, blade body；2nd, fixing hole；3rd, blade；4th, mounting hole.
Specific embodiment
The present invention is further described below with reference to specific embodiment.
Embodiment 1
As depicted in figs. 1 and 2, a kind of big dise knife, including blade body 1, fixing hole 2, blade 3 and mounting hole 4；Its specification
It is 610 × 70 × 5.5mm of φ；The big dise knife prior heat treatment process is typically tempered again using direct quenching, cooling after normalizing, this
The method of kind makes workpiece, and deflection is larger after quenching, is mainly manifested in big dise knife surface irregularity, poor flatness, follow-up grinding machine
Allowance for finish is big, waste of materials, process time extension；Increase smoothing step after improvement after quenching Step, but use pressure
Big dise knife after machine smoothing is susceptible to cracking, and the product that ftractures cannot carry out subsequent handling, cause scrappage high.For in solution
Problem is stated, the present invention is adopted the following technical scheme that.
A kind of great circle cutter manufacturing method, its step is：
1) raw material use hot rolled plate, and its Ingredient percent is C：0.60~0.70%, Si：0.11~0.37%,
Mn：0.90~1.20%, S≤0.035%, P≤0.035%, Cr≤0.25%, Ni≤0.25%, Cu≤0.25%, balance of
Fe；
2) by step 1) in raw material carry out roughing：Semi-finished product as shown in Figure 1 are switched to plasma wire cutting；Again to knife
Piece body 1 is drilled, and processes fixing hole 2 and mounting hole 4；Flash removed is removed, material crack, interlayer defect is checked；
3) normalizing, by step 2) in box resistive band stove heats of the horizontally mounted 90kw of big dise knife after the completion of roughing extremely
880 DEG C, regulation heating coefficient is 1.5min/mm, is come out of the stove after insulation 9min；
4) by step 3) in come out of the stove after big dise knife to be placed on surface roughness be Ra 0.8, case hardness for 56HRC
Metal platform, using the area s=29 of impact surface2π, surface roughness are that Ra 0.8, case hardness is the metal hammer flattener of 56HRC
Impact big dise knife surface frequency n=ε * D* (S/s)=0.0288 × 5.5 × { [(610/2)2π]/282π } ≈ 18.79, round 19
It is secondary, big dise knife is overturn, impact another surface of big dise knife 19 times；Dynamics F=KD=95 × 5.5N=522.5N is impacted each time；
5) normalizing, by step 4) the big dise knife after impact is put into 720 DEG C of batch-type furnace inside holding 2h, then stove be cooled to 500 DEG C with
Under, come out of the stove；
6) by step 5) in come out of the stove after big dise knife forcing press smoothing, smoothing pressure be 100t；
7) by step 6) in smoothing after big dise knife be cooled to room temperature, fixed with fixture；
8) be tempered, by step 7) fixed with fixture after big dise knife be put into 90kw air circulation resistive band stoves, be heated to
200 DEG C, regulation heating coefficient is 1.5min/mm, is incubated 2h, is come out of the stove, and is cooled to room temperature；
9) quench, by step 8) in be cooled to the box resistive band stove heats of the horizontally mounted 90kw of big dise knife after room temperature extremely
880 DEG C, regulation heating coefficient is 1.5min/mm, is come out of the stove after insulation 4min, is vertically put into 32# machine oil, is cooled to 140 DEG C and takes
Go out；
10) deep cooling, by step 9) in take out big dise knife be cooled to room temperature after be put into deep cooling in 0~-196 DEG C of cold treatment stoves
To -130 DEG C, after insulation 4h, it is warming up to -30 DEG C and comes out of the stove；
11) by step 10) in come out of the stove after big dise knife be warming up to after room temperature and taken out from fixture, verification；
12) finish；Big dise knife completes.
The manufacture method of big dise knife of the invention is entered according to big dise knife thickness, surface area parameters after normalizing to big dise knife surface
The impact of the quantitative number of times of row, the big dise knife inner integument body of light after can making roughing within the shortest time adds some points shape pearlitic structrure most
Bigization changes into the pearlitic structrure that grain size is 2.5~6 grades, more preferable crystal grain thinning, while playing the big dise knife hair of elimination
Defect, the effect of optimization heterogeneous microstructure such as cast condition of the base in smelting process is loose；Quantification impact improves production effect
Rate, saves the time, reduces labour intensity；Impact dynamics is also adopted by quantification setting, can further improve impact efficiency,
The waste of unnecessary time and labour is reduced, the optimization of resources alocation is reached；And by carrying out normalized treatment after impact again,
The machining stress that impact step is produced can be eliminated, further optimizes the microstructure of big dise knife；By big after above-mentioned steps
Dise knife uses forcing press smoothing process again, then big dise knife can be made successfully to avoid the cracking occurred during smoothing, reduces and scraps
Rate, improves big dise knife quality；Big dise knife after smoothing is tempered, and carries out subzero treatment after tempering again, is made its original time
Fiery martensitic structure adds 8%~and 20% retained austenite tissue is fully changed into high strength martensitic tissue, fully eliminates residual
Remaining internal stress, reduces yielding and problem of Cracking generation of being heated when the big dise knife of finished product is used, while subzero treatment makes big dise knife
Hardness increased 2~3HRC, improve the overall wear resistance of big dise knife, improve the intensity and toughness of big dise knife, be allowed to
Good linearity can be kept during use；
Big dise knife after being heat-treated using embodiment method, through inspection, its deflection is 0.10mm~0.30mm, after meeting
Continuous finishing requirements；The big dise knife hardness of this method manufacture is high and uniform, and hardness reaches 56~60HRC；It is difficult because receiving in use
Thermal deformation, the more general dise knife of service life improves 8~10 times；Big dise knife is made using the method, flawless after smoothing is scrapped
Rate is zero.
Embodiment 2
A kind of great circle cutter manufacturing method, its step is：
1) raw material use hot rolled plate, and its Ingredient percent is C：0.60~0.70%, Si：0.11~0.37%,
Mn：0.90~1.20%, S≤0.035%, P≤0.035%, Cr≤0.25%, Ni≤0.25%, Cu≤0.25%, balance of
Fe；
2) by step 1) in raw material carry out roughing：Semi-finished product as shown in Figure 1 are switched to plasma wire cutting；Again to knife
Piece body 1 is drilled, and processes fixing hole 2 and mounting hole 4；Flash removed is removed, material crack, interlayer defect is checked；
3) normalizing, by step 2) in box resistive band stove heats of the horizontally mounted 90kw of big dise knife after the completion of roughing extremely
860 DEG C, regulation heating coefficient is 1.4min/mm, is come out of the stove after insulation 8min；
4) by step 3) in come out of the stove after big dise knife to be placed on surface roughness be Ra 1.6, case hardness for 60HRC
Metal platform, using the area s=29 of impact surface2π, the surface roughness of impact surface are that Ra 1.6, case hardness is 60HRC's
Metal hammer flattener impacts big dise knife surface 19 times, overturns big dise knife, impacts another surface of big dise knife 19 times；
5) normalizing, by step 4) the big dise knife after impact is put into 720 DEG C of batch-type furnace inside holding 2h, then stove be cooled to 500 DEG C with
Under, come out of the stove；
6) by step 5) in come out of the stove after big dise knife forcing press smoothing, smoothing pressure be 100t；
7) by step 6) in smoothing after big dise knife be cooled to room temperature, fixed with fixture；
8) be tempered, by step 7) fixed with fixture after big dise knife be put into 90kw air circulation resistive band stoves, be heated to
190 DEG C, regulation heating coefficient is 1.4min/mm, is incubated 2h, is come out of the stove, and is cooled to room temperature；
9) quench, by step 8) in be cooled to the box resistive band stove heats of the horizontally mounted 90kw of big dise knife after room temperature extremely
860 DEG C, regulation heating coefficient is 1.4min/mm, is come out of the stove after insulation 3min, is vertically put into 32# machine oil, is cooled to 130 DEG C and takes
Go out；
10) deep cooling, by step 9) in take out big dise knife be cooled to room temperature after be put into deep cooling in 0~-196 DEG C of cold treatment stoves
To -120 DEG C, after insulation 4h, it is warming up to -25 DEG C and comes out of the stove；
11) by step 10) in come out of the stove after big dise knife be warming up to after room temperature and taken out from fixture, verification；
12) finish；Big dise knife completes.
Big dise knife after being heat-treated using the present embodiment method, through inspection, its deflection is 0.10mm~0.30mm, is met
Follow-up finishing requirements；The big dise knife hardness of this method manufacture is uniform, is 56~60HRC；It is difficult in use because of temperature distortion, is made
6~8 times are improve with life-span more general dise knife；Big dise knife is made using the method, the product that crackle occurs after smoothing is less, report
Useless rate is 0.1~0.5%.
Embodiment 3
A kind of great circle cutter manufacturing method, its step is：
1) raw material use hot rolled plate, and its Ingredient percent is C：0.60~0.70%, Si：0.11~0.37%,
Mn：0.90~1.20%, S≤0.035%, P≤0.035%, Cr≤0.25%, Ni≤0.25%, Cu≤0.25%, balance of
Fe；
2) by step 1) in raw material carry out roughing：Semi-finished product as shown in Figure 1 are switched to plasma wire cutting；Again to knife
Piece body 1 is drilled, and processes fixing hole 2 and mounting hole 4；Flash removed is removed, material crack, interlayer defect is checked；
3) normalizing, by step 2) in box resistive band stove heats of the horizontally mounted 90kw of big dise knife after the completion of roughing extremely
900 DEG C, regulation heating coefficient is 1.6min/mm, is come out of the stove after insulation 10min；
4) by step 3) in come out of the stove after big dise knife to be placed on surface roughness be Ra 0.8, case hardness for 56HRC
Metal platform, using the area s=29 of impact surface2π, the surface roughness of impact surface are that Ra 0.8, case hardness is 56HRC's
Metal hammer flattener impacts big dise knife surface 19 times, overturns big dise knife, impacts another surface of big dise knife 19 times；
5) normalizing, by step 4) the big dise knife after impact is put into 720 DEG C of batch-type furnace inside holding 2h, then stove be cooled to 500 DEG C with
Under, come out of the stove；
6) by step 5) in come out of the stove after big dise knife forcing press smoothing, smoothing pressure be 100t；
7) by step 6) in smoothing after big dise knife be cooled to room temperature, fixed with fixture；
8) be tempered, by step 7) fixed with fixture after big dise knife be put into 90kw air circulation resistive band stoves, be heated to
210 DEG C, regulation heating coefficient is 1.6min/mm, is incubated 2h, is come out of the stove, and is cooled to room temperature；
9) quench, by step 8) in be cooled to the box resistive band stove heats of the horizontally mounted 90kw of big dise knife after room temperature extremely
900 DEG C, regulation heating coefficient is 1.6min/mm, is come out of the stove after insulation 5min, is vertically put into 32# machine oil, is cooled to 150 DEG C and takes
Go out；
10) deep cooling, by step 9) in the big dise knife that takes out be cooled to after room temperature big dise knife and be put into 0~-196 DEG C of cold treatment stoves
Interior deep cooling after insulation 4h, is warming up to -35 DEG C and comes out of the stove to -140 DEG C；
11) by step 10) in come out of the stove after big dise knife be warming up to after room temperature and taken out from fixture, verification；
12) finish；Big dise knife completes.
Big dise knife after being heat-treated using the present embodiment method, through inspection, its deflection is 0.10mm~0.30mm, is met
Follow-up finishing requirements；The big dise knife hardness of this method manufacture is uniform, is 56~60HRC；It is difficult in use because of temperature distortion, is made
5~7 times are improve with life-span more general dise knife；Big dise knife is made using the method, the product that crackle occurs after smoothing is less, report
Useless rate is 0.5~1%.
Claims (8)
1. a kind of great circle cutter manufacturing method, including following heat treatment step：
1) normalizing, by roughing after the completion of the horizontal shove charge of big dise knife be heated to 860~900 DEG C, heating coefficient 1.4~
1.6min/mm, comes out of the stove after 8~10min of insulation；
2) by step 1) in come out of the stove after big dise knife be placed on metal platform, big dise knife surface n time, n are impacted using metal hammer flattener
Rounded equal to ε * D* (S/s), wherein ε be big dise knife material Poisson's ratio 1/10th, D be big dise knife thickness, unit is mm,
S is big dise knife surface area, and s is the area of metal hammer flattener impact surface；Big dise knife is overturn, big another surface n of dise knife time is impacted；
3) normalizing, by step 2) the big dise knife after impact is put into 720 DEG C of batch-type furnace inside holding 2h, then stove is cooled to less than 500 DEG C, goes out
Stove；
4) by step 3) in come out of the stove after big dise knife smoothed with forcing press；
5) by step 4) in smoothing after big dise knife be cooled to room temperature, fixed with fixture；
6) be tempered, by step 5) fixed with fixture after big dise knife shove charge be heated to 190~210 DEG C, heating coefficient 1.4~
1.6min/mm, is incubated 2h, comes out of the stove, and is cooled to room temperature；
7) quench, by step 6) in be cooled to the horizontal shove charge of big dise knife after room temperature and be heated to 860~900 DEG C, heating coefficient 1.4
~1.6min/mm, comes out of the stove after 3~5min of insulation, and vertical immersion oil is cooled to 130~150 DEG C of taking-ups；
8) deep cooling, by step 7) in the big dise knife that takes out be cooled to after room temperature and be put into cold treatment stove deep cooling to -120~-140
DEG C, after insulation 4h, it is warming up to -25~-35 DEG C and comes out of the stove；
9) by step 8) in come out of the stove after big dise knife be warming up to after room temperature and taken out from fixture, verification；
Described big dise knife raw material use hot rolled plate, and its Ingredient percent is C：0.60~0.70%, Si：0.11~
0.37%th, Mn：0.90~1.20%, S≤0.035%, P≤0.035%, Cr≤0.25%, Ni≤0.25%, Cu≤
0.25%, balance of Fe.
2. a kind of great circle cutter manufacturing method according to claim 1, it is characterised in that：Described step 2) in metal platform
Surface roughness and metal hammer flattener impact surface surface roughness be 0.8~Ra of Ra 1.6；The case hardness of metal platform
It is 56~60HRC with the hardness of the impact surface of metal hammer flattener.
3. a kind of great circle cutter manufacturing method according to claim 1, it is characterised in that：Described step 2) in hit each time
The dynamics F=KD for beating, wherein K take 90~100N/mm.
4. a kind of great circle cutter manufacturing method according to claim 1, it is characterised in that：Described step 4) in forcing press school
The flat pressure for using is 100t.
5. a kind of great circle cutter manufacturing method according to claim 1, it is characterised in that：Described step 7) in hardening media
It is 32# machine oil.
6. a kind of great circle cutter manufacturing method according to claim 1, it is characterised in that：Described step 1), 7) in heating
Stove be the box resistive band stoves of 90kw；Described step 6) in tempering stove be 90kw air circulation resistive band stoves；Described step
It is rapid 8) in cold treatment stove be 0~-196 DEG C of subzero treatment stoves.
7. a kind of great circle cutter manufacturing method according to claim 1~6 any one, it is characterised in that：Also include at heat
Roughing step before reason：1) plasma wire cutting is switched to semi-finished dimensions；2) drilling or tooth punching；3) flash removed is removed, material is checked
Crackle, interlayer defect.
8. a kind of big dise knife, it is characterised in that：It is made of the method described in claim 1.
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| CN201610022400.1A CN105441789B (en) | 2016-01-12 | 2016-01-12 | Large circular knife and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106112123B (en) * | 2016-08-30 | 2019-05-14 | 山东黑旋风锯业有限公司 | A kind of cooling press of saw bit matrix |
| CN106392521B (en) * | 2016-11-28 | 2018-08-21 | 三明市宏立机械制造有限公司 | A kind of arc cutter production technology |
| CN108581061A (en) * | 2018-05-11 | 2018-09-28 | 广西奇飞科技有限公司 | A kind of tooth form dise knife with reinforcing rib structure |
| CN108838305A (en) * | 2018-07-13 | 2018-11-20 | 无为县众鑫电缆有限公司 | Cutting equipment is used in a kind of processing of cable |
| CN110129541B (en) * | 2019-04-12 | 2020-11-27 | 沈阳透平机械股份有限公司 | Heat treatment process of narrow-runner impeller for ethylene compressor |
| CN110579382A (en) * | 2019-07-05 | 2019-12-17 | 南京钢铁股份有限公司 | Pressing cutter for pressing DWTT sample notch and using method thereof |
| CN110977030A (en) * | 2019-11-26 | 2020-04-10 | 马鞍山市松林刮刀锯有限公司 | Large-diameter disc all-steel cutter and manufacturing process thereof |
| CN110977369A (en) * | 2019-12-31 | 2020-04-10 | 昆山品越精密模具有限公司 | Forming process of bearing ring cutting knife |
| CN113560961A (en) * | 2021-07-15 | 2021-10-29 | 马鞍山市恒利达机械刀片有限公司 | Processing technology of high-precision non-woven fabric upper cutter |
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| CN102974991B (en) * | 2012-12-24 | 2013-07-31 | 马鞍山市恒利达机械刀片有限公司 | Manufacturing method for tool for machining heat treatment deformation circular-disc blade |
| CN103397159B (en) * | 2013-07-26 | 2015-07-29 | 常熟市劲力工具有限公司 | Cut the production technique of rotary knife |
| CN104923849B (en) * | 2015-07-08 | 2017-03-08 | 安徽华天机械股份有限公司 | A kind of longitudinal shearing slitting cylinder blade and its manufacture method |
| CN104942879B (en) * | 2015-07-08 | 2017-03-01 | 安徽华天机械股份有限公司 | A kind of flat round knife and its manufacture method |
| CN104908079B (en) * | 2015-07-08 | 2016-08-31 | 安徽华天机械股份有限公司 | One cuts cutting disc and manufacture method thereof |
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Denomination of invention: A large round knife and its manufacturing method Effective date of registration: 20201104 Granted publication date: 20170524 Pledgee: Hengshan Ma'anshan finance Company limited by guarantee Pledgor: ANHUI FENGLIRUI BLADE MANUFACTURE Co.,Ltd. Registration number: Y2020980007527 |
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Date of cancellation: 20211012 Granted publication date: 20170524 Pledgee: Hengshan Ma'anshan finance Company limited by guarantee Pledgor: ANHUI FENGLIRUI BLADE MANUFACTURE Co.,Ltd. Registration number: Y2020980007527 |