CN106862649B - A kind of high-precision disc rolling shearing blade and its manufacturing method - Google Patents
A kind of high-precision disc rolling shearing blade and its manufacturing method Download PDFInfo
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- CN106862649B CN106862649B CN201710201032.1A CN201710201032A CN106862649B CN 106862649 B CN106862649 B CN 106862649B CN 201710201032 A CN201710201032 A CN 201710201032A CN 106862649 B CN106862649 B CN 106862649B
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- 238000010008 shearing Methods 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 238000005096 rolling process Methods 0.000 title claims abstract description 27
- 150000003839 salts Chemical class 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000003746 surface roughness Effects 0.000 claims abstract description 10
- 238000011282 treatment Methods 0.000 claims abstract description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 7
- 238000005516 engineering process Methods 0.000 claims abstract description 7
- 238000005498 polishing Methods 0.000 claims abstract description 4
- 239000011780 sodium chloride Substances 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- 239000011159 matrix material Substances 0.000 description 6
- 238000010791 quenching Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D35/00—Tools for shearing machines or shearing devices; Holders or chucks for shearing tools
-
- 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
- B23P15/40—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools shearing tools
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses a kind of high-precision disc rolling shearing blade and its manufacturing methods, belong to machinery production cutter manufacture technology field, and which solve the low problems of existing rolling shearing blade processing quality precision.The roller shears of the present invention manufacture with the following method：Step 1,0.40~0.60mm of allowance for finish is stayed in roughing；Step 2, it quenches, is put into deep fat or salt made from earth containing a comparatively high percentage of sodium chloride to 140 DEG C and takes out；Step 3, subzero treatment keeps the temperature 4 6h in 140 DEG C~160 DEG C environment；Step 4, it is tempered, is heated to 500 ± 10 DEG C, keep the temperature 3h, come out of the stove, be cooled to room temperature；Step 5, grinding；Step 6, it polishes, polishing workpiece is to dimensional tolerance in 0.001mm, surface roughness ＜ Ra0.07 μm.The present invention can effectively improve every quality index of rolling shearing blade, play the advantageous effect for the shearing quality that prolongs the service life, improves.
Description
Technical field
The invention belongs to machinery production cutter manufacture technology fields, specifically, being related to a kind of high-precision disc rolling shearing
Blade and its manufacturing method.
Background technology
Roller shears are mainly used for the products such as shearing steel disc, steel pipe, copper strips in mechanical processing；The blade abbreviation roller shear of roller shears
Blade, Mass accuracy is mainly reflected in three aspects, first, the tolerance value of blade thickness size, second is that the two big plane of blade it
Between the depth of parallelism, third, the surface roughness of big plane.
Chinese Patent Application No. 201511034125.7, the patent application document in publication date on June 1st, 2016, discloses
A kind of composite construction disc rolling shearing knife.Including inner ring cutter hub and outer ring cutter hub, the inner ring cutter hub is I-shape construction, described interior
It encloses cutter hub and outer ring cutter hub is equipped with screw hole, the inner ring cutter hub is fixedly connected with outer ring cutter hub.Disclosed in the patent application
Technical solution can save convenient precious materials, dismounting blade, the loss of reduction cutter and use cost, can greatly improve production effect
Rate.
Chinese Patent Application No. 201120162794.3, the patent document in publication date on January 25th, 2012, discloses one kind
Circular roller shears have the characteristics that the roller shears service life can be improved.The roller shears, including tool matrix and cooperation exist
The blade of tool matrix periphery is provided with the locating piece for preventing blade from falling off between tool matrix and blade.Due in matrix
Locating piece is provided between blade, in this way, during the work time, which can prevent the inner edge tool matrix of blade
Periphery occurs relative motion and substantially increases the use of roller shears so as to prevent blade from falling off from tool matrix well
Service life is suitble to promote and apply on the various cutters for inlaying combination.
The Mass accuracy of existing rolling shearing blade is not high, is mainly reflected in：The thickness tolerance of roller shears is merely able to control
In ± 0.006mm, surface roughness is merely able to control at≤Ra0.09 μm, and the depth of parallelism of two big planes is merely able to control and exists
0.008~0.009mm；Since two big plane parallelism of rolling shearing blade is poor, assembling position gap is inconsistent in circumferencial direction,
Small crushing knife sword power is easy tod produce in shear history, leads to the product size cause not of uniform size after shearing, product edge occurs
Generate the bad phenomenons such as burr, the irregular, crimping of notch；The requirement of client is not achieved in surface roughness, when rolling shearing blade works
Two big planes are easy the viscous product being sheared, and directly affect shearing production and are smoothed out, so as to cause low production efficiency, product matter
Amount can not also ensure.
Invention content
1, it to solve the problems, such as
For the low problem of existing rolling shearing blade processing quality precision, the present invention provides a kind of high-precision disc rolling shearing blade
And its manufacturing method, every quality index of rolling shearing blade can be effectively improved, is played and is prolonged the service life, improves shearing matter
The advantageous effect of amount.
2, technical solution
To solve the above problems, the present invention adopts the following technical scheme that.
A kind of manufacturing method of high-precision disc rolling shearing blade, includes the following steps：
Step 1, it uses material for Cr12MoV alloy die steel roughing, stays 0.40~0.60mm of allowance for finish；
Step 2, it quenching, workpiece in step 1 is put into the box resistance band stoves of 90kw, adjusting heating coefficient is 1.5min/mm,
730 DEG C are first heated to, 6min is kept the temperature, is again heated to 850 DEG C, is come out of the stove after keeping the temperature 4min, is put into 1050 DEG C of salt baths in salt bath furnace and adds
Heat is placed into oil or salt made from earth containing a comparatively high percentage of sodium chloride and is taken out to 140 DEG C；
Step 3, workpiece after cooling in step 1 is put into cryogenic processor, at -140 DEG C~-160 DEG C by subzero treatment
4-6h is kept the temperature in environment；
Step 4, it is tempered, the workpiece after subzero treatment in above-mentioned steps 3 is put into 90kw air circulation resistance band stoves, adjust
Section heating coefficient is 1.5min/mm, is heated to 500 ± 10 DEG C, keeps the temperature 3h, comes out of the stove, be cooled to room temperature；
Step 5, grinding is roughly ground first to made allowance 0.08mm, is then refined for the first time, fine grinding to made allowance
0.03~0.05mm is refined again to made allowance ± 0.002mm；
Step 6, it polishes, polishing workpiece is to dimensional tolerance in -0.001mm, surface roughness ＜ Ra0.07 μm.
Preferably, rough grinding process uses machine models for M7475 rotary grinders in step 5.
Preferably, fine grinding technology uses machine models for M7363 rotary grinders in step 5, rotating speed 120r/min.
Preferably, workpiece is impregnated to 20~30h after roughly grinding and refine every time in step 5 in 145 DEG C of deep fat.
Preferably, it tests at a constant temperature to the workpiece size after fine grinding after being refined in step 5.
Preferably, the use of machine models is M7363 rotary grinders in step 6, installs model 46J's on bistrique
Soft grinding wheel, setting Soft grinding wheel rotating speed are 100/min, are polished to workpiece.
A kind of high-precision disc rolling shearing blade, is manufactured using the above method.
3, advantageous effect
Compared with the prior art, beneficial effects of the present invention are：
(1) after the present invention is improved by manufacturing procedure, according to the analysis of reality and data, it is effectively improved the essence of product
Degree and the depth of parallelism, to also improve the wearability of roller shears, the roller shears service life compared to the manufacture of former production technology carries
It is 3 times high, while also reducing client's use cost and reducing the time for frequently replacing cutter, it improves work efficiency；
(2) present invention is quenched using the high temperature height for quenching opposite low with traditional handicraft low temperature, reduces heat-treatment distortion amount, to
The finishing made allowance for reducing the preceding blank of heat treatment, saves material, improves machining accuracy；
(3) present invention workpiece is impregnated in 145 DEG C of deep fat to after corase grinding and fine grinding 20-30h every time in steps of 5 can be with
Effectively remove stress；
(4) for the allowance control of the thickness of rolling shearing blade manufactured by present invention process within ± 0.003mm, two is big flat
The depth of parallelism≤the 0.005mm in face, surface roughness≤Ra0.05 μm.
Description of the drawings
Fig. 1 is the structural schematic diagram of rolling shearing blade of the present invention.
Fig. 2 is the sectional view of Fig. 1.
Specific implementation mode
The present invention is further described below with reference to specific embodiment.
Embodiment 1
A kind of high-precision disc rolling shearing blade, using following manufacturing method, including step：
Step 1, it uses material for Cr12MoV alloy die steel roughing, stays 0.40~0.60mm of allowance for finish；
It is 0.60-0.80mm that allowance for finish is generally stayed in the manufacturing process of traditional rolling shearing blade, and the present invention is due to using
Following heat treatment process can effectively reduce workpiece deflection, therefore stay 0.40~0.60mm of allowance for finish after roughing
Both meet finishing needs, and improved the accuracy of manufacture, and also save raw material；
Step 2, it quenches, the workpiece after roughing in step 1 is put into the box resistance band stoves of 90kw, adjust heating coefficient
For 1.5min/mm, 730 DEG C are first heated to, keeps the temperature 6min, is again heated to 850 DEG C, comes out of the stove, is put into salt bath furnace after keeping the temperature 4min
1050 DEG C of salt bath heatings are put into 60~80 DEG C of 32# hot engine oils after taking-up and are cooled to 140 DEG C of taking-ups；32# heat engines in this step
The effect of oil is to ensure Ovshinsky physical efficiency to be cooled down more than the speed of critical cooling rate, to obtain martensitic structure；
" adjusting heating coefficient is 1.5min/mm, is first heated to 730 DEG C, keeps the temperature 6min, is again heated to 850 in this step
DEG C, come out of the stove after keeping the temperature 4min " deformation caused by high temperature can be directly entered from room temperature and excessive temperature differentials is produced to avoid workpiece
Raw structural stress and thermal stress；" 1050 DEG C of salt bath heatings in salt bath furnace are put into, 60~80 DEG C of 32# heat engines are put into after taking-up
140 DEG C of taking-ups are cooled in oil ", 60~80 DEG C of 32# hot engine oils cooling easily causes workpiece surface oxidation, salt bath in this implementation
Stove heat speed is fast, and temperature is uniform, and object is in heating in saline solution always, can form one layer of salt film in workpiece surface, play guarantor
The not oxidized effect with decarburization of workpiece surface is protected, to avoid workpiece heating time in high temperature long caused surface mistake
Heat and subsequently enter deep fat excessive temperature differentials cause deformation of products and cracking phenomena,.
Step 3, workpiece after cooling in step 1 is put into cryogenic processor, at -140 DEG C~-160 DEG C by subzero treatment
4~6h is kept the temperature in environment；
In this step by -140 DEG C~-160 DEG C subzero treatments after, residue austenite can after can making heat treatment of workpieces
To be fully changed into martensite, eliminate the structural stress generated when heat treatment and thermal stress, crystal grain thinning reach tissue it is more stable,
The effect that the service life is longer；
Step 4, it is tempered, the workpiece after subzero treatment in above-mentioned steps 3 is put into 90kw air circulation resistance band stoves, adjust
Section heating coefficient is 1.5min/mm, is heated to 500 ± 10 DEG C, keeps the temperature 3h, comes out of the stove, be cooled to room temperature；
It is to be tested many times this material heat treatment process of Cr12MoV to obtain that heating coefficient is tempered in this step, according to
The property of Cr12MoV, this step and the difference of normal quenching (low to quench low time) are that red hard effect is more preferable, can be played wear-resisting, tired
Labor intensity is high, the service life is longer；
Step 5, grinding uses machine models to be roughly ground in above-mentioned steps 4 for M7475 rotary grinders and is tempered first
Workpiece afterwards, made allowance 0.08mm impregnate 25h taking-ups in 145 DEG C of deep fat, then use machine models flat for M7363 round platforms
Face grinding machine, setting rotating speed are 120/min, are refined for the first time, 0.03~0.05mm of made allowance impregnates in 145 DEG C of deep fat
25h takes out, and refines again, made allowance ± 0.002mm is put into 145 DEG C of deep fat and impregnates 25h；To the work after fine grinding under constant temperature
Part size is tested；
The grinding of the present invention improves grinding accuracy by once roughly grinding with secondary fine grinding, and control is ground each time
25h is impregnated in 145 DEG C of deep fat to workpiece afterwards to go de-stress, greatly improves the thickness tolerance and two of roller shears
Big plane parallelism；
Step 6, it polishes, the use of machine models is M7363 rotary grinders, the soft of model 46J is installed on bistrique
Grinding wheel, setting Soft grinding wheel rotating speed are 100/min, are polished to workpiece, and polishing workpiece is to dimensional tolerance on -0.001mm, surface
Roughness<Ra0.07μm.
The rolling shearing blade of method manufacture through the invention, thickness tolerance can control within ± 0.003mm,
The depth of parallelism≤0.005mm of two big planes, the surface roughness of big plane≤Ra0.05 μm；Compared with general technology is compared to effect
As shown in the table：
Due to reducing the deflection of product in the present invention to the improvement of heat treatment process, while secondary fine grinding is used, and
Control impregnates 20-30h to go de-stress to workpiece after being ground each time in 145 DEG C of deep fat, greatly improves roller shears
Thickness tolerance and two big plane parallelisms；High precision size tolerance and surface roughness are obtained by follow-up polishing process
It provides the foundation.
Claims (7)
1. a kind of manufacturing method of high-precision disc rolling shearing blade, includes the following steps：
Step 1, it uses material for Cr12MoV alloy die steel roughing, stays 0.40 ~ 0.60 mm of allowance for finish；
Step 2, it quenches, workpiece in step 1 is put into the box resistance band stoves of 90 kw, adjusting heating coefficient is 1.5 min/mm, first
730 DEG C are heated to, 6 min are kept the temperature, is again heated to 850 DEG C, comes out of the stove after keeping the temperature 4 min, is put into 1050 DEG C of salt baths in salt bath furnace
Heating places into oil or salt made from earth containing a comparatively high percentage of sodium chloride and is cooled to 140 DEG C of taking-ups；
Step 3, workpiece after cooling in step 2 is put into cryogenic processor by subzero treatment, in -140 DEG C~-160 DEG C environment
Middle heat preservation 4-6 h；
Step 4, it is tempered, the workpiece after subzero treatment in above-mentioned steps 3 is put into 90 kw air circulation resistance band stoves, adjust
Heating coefficient is 1.5 min/mm, is heated to 500 ± 10 DEG C, keeps the temperature 3 h, comes out of the stove, be cooled to room temperature；
Step 5, grinding is roughly ground first to 0.08 mm of made allowance, is then refined for the first time, fine grinding to made allowance 0.03
~0.05 mm is refined again to ± 0.002 mm of made allowance；
Step 6, it polishes, polishing workpiece is to dimensional tolerance in -0.001mm, surface roughness ＜ Ra0.07 μm.
2. a kind of manufacturing method of high-precision disc rolling shearing blade according to claim 1, it is characterised in that：In step 5
Rough grinding process uses machine models for M7475 rotary grinders.
3. a kind of manufacturing method of high-precision disc rolling shearing blade according to claim 2, it is characterised in that：In step 5
Fine grinding technology uses machine models for M7363 rotary grinders, and wherein the rotating speed of rotary grinder is 120 r/min.
4. a kind of manufacturing method of high-precision disc rolling shearing blade according to claim 3, it is characterised in that：In step 5
Workpiece is impregnated into 20 ~ 30 h in 145 DEG C of deep fat after roughly grinding and refine every time.
5. a kind of manufacturing method of high-precision disc rolling shearing blade according to claim 4, it is characterised in that：In step 5
It tests at a constant temperature to the workpiece size after fine grinding after fine grinding.
6. a kind of manufacturing method of high-precision disc rolling shearing blade according to claim 5, it is characterised in that：In step 6
The use of machine models is M7363 rotary grinders, the Soft grinding wheel of model 46J is installed on bistrique, Soft grinding wheel rotating speed is set
For 100r/min, workpiece is polished.
7. a kind of high-precision disc rolling shearing blade, it is characterised in that：It is manufactured using method described in claim 1.
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| CN107186849B (en) * | 2017-07-20 | 2021-02-05 | 安徽省凌锋冶金机械有限公司 | Production process of high-precision forestry combined blade |
| CN109623306A (en) * | 2019-01-17 | 2019-04-16 | 安徽屹盛机电科技有限公司 | A kind of lawn rounding machine cutter production technology |
| CN109773436B (en) * | 2019-03-11 | 2021-01-08 | 重庆安驰芯金属制品有限公司 | Cylindrical toothed cutter and machining process thereof |
| CN110125629B (en) * | 2019-06-27 | 2020-04-07 | 马鞍山市恒利达机械刀片有限公司 | High-flatness roller shear blade machining process |
| CN110814866B (en) * | 2019-11-18 | 2022-03-25 | 江阴市三田服装机械有限公司 | Manufacturing process of straight cutter cutting machine blade |
| CN114193092B (en) * | 2021-12-03 | 2023-01-24 | 深圳市玉沣科技有限公司 | Precision machining method for core part of semiconductor equipment |
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| IT1401998B1 (en) * | 2010-09-30 | 2013-08-28 | Danieli Off Mecc | CUTTING SHEET OF LAMINATED PRODUCTS AND ITS PRODUCTION PROCESS |
| CN103045831A (en) * | 2012-12-05 | 2013-04-17 | 燕山大学 | Method for improving cold-work die steel hardness |
| CN104018096B (en) * | 2014-05-16 | 2016-05-25 | 成都开元辊业有限公司 | High speed steel roll collar and preparation method thereof |
| CN105779898B (en) * | 2014-12-23 | 2017-10-27 | 鞍钢股份有限公司 | A kind of cold work die steel plate and its manufacture method |
| CN106282510A (en) * | 2016-08-25 | 2017-01-04 | 瑞安市劲力机械制造有限公司 | The forging of Cr12 steel mold and Technology for Heating Processing |
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