CN102345006A - Method for manufacturing screw - Google Patents
Method for manufacturing screw Download PDFInfo
- Publication number
- CN102345006A CN102345006A CN2011102287214A CN201110228721A CN102345006A CN 102345006 A CN102345006 A CN 102345006A CN 2011102287214 A CN2011102287214 A CN 2011102287214A CN 201110228721 A CN201110228721 A CN 201110228721A CN 102345006 A CN102345006 A CN 102345006A
- Authority
- CN
- China
- Prior art keywords
- screw rod
- screw
- green body
- vacuum oven
- crude green
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title abstract description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000005121 nitriding Methods 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000005498 polishing Methods 0.000 claims abstract description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 7
- 238000010791 quenching Methods 0.000 claims abstract description 7
- 230000000171 quenching effect Effects 0.000 claims abstract description 7
- 238000000227 grinding Methods 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims abstract description 4
- 238000010792 warming Methods 0.000 claims description 15
- 238000000354 decomposition reaction Methods 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 9
- 229910003460 diamond Inorganic materials 0.000 claims description 6
- 239000010432 diamond Substances 0.000 claims description 6
- 239000004519 grease Substances 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 239000004922 lacquer Substances 0.000 claims description 3
- 230000001915 proofreading effect Effects 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 229920006351 engineering plastic Polymers 0.000 abstract description 2
- 239000003365 glass fiber Substances 0.000 abstract 1
- 238000003801 milling Methods 0.000 abstract 1
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 241000234671 Ananas Species 0.000 description 2
- 235000007119 Ananas comosus Nutrition 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/53—Screws having a varying channel depth, e.g. varying the diameter of the longitudinal screw trunk
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Transmission Devices (AREA)
Abstract
The invention relates to a method for manufacturing a screw, which is characterized by comprising the following steps of: 1, sorting, i.e. selecting a metal rod of a common material FDAC or SLD or DC53 and blanking according to specified specification and length; 2, carrying out coarse grinding until each position has positive allowance of 1mm according to the specification of a drawing; 3, manufacturing the screw and milling a screw channel and a key groove according to the requirements of the drawing; 4, carrying out vacuum quenching treatment so that the hardness reaches HRC48 to 52, correcting and grinding the excircle of each part to the accuracy required by the drawing; 5, placing the obtained product into a gas nitriding furnace to carry out nitrogen treatment; and 6, carrying out fine grinding and polishing until the size required by the drawing is achieved. The method has the advantages that by the vacuum quenching and nitriding treatment of the process, the screw has the integral hardness of HRC52 to 60 and the surface hardness of HV900, so that the screw has high wear resistance; the requirements of corrosiveness engineering plastics added with less than 35 percent of glass fibers can be met; the service life of the screw is over three times of that of the existing bimetallic screw.
Description
Technical field
The present invention relates to a kind of screw rod field, especially refer to be used for the making method of a kind of screw rod on injection moulding machine, forcing machine and the rubber machine.
Background technology
Existing a kind of patent No. discloses a kind of pair of efficient screw in injection molding machine that rank are compressed for the Chinese invention patent that the CN201020548908.3 name is called " the efficient screw in injection molding machine of a kind of pair of rank compression ", mainly is made up of solid conveying section, compression melt zone, metering homogenizing zone.Wherein the solid conveying section spiral groove depth is constant; The compression melt zone is the compression section, two rank that three segments are formed, and the first segment spiral groove depth is gradually shallow, and the second segment spiral groove depth is constant, and the 3rd segment spiral groove depth is gradually shallow.Metering homogenizing zone spiral groove depth is constant, is made up of two segments, and first segment is conventional thread segment, and second segment is a pineapple mixing refining head structure.Three segment formula structures of compression melt zone help improving fusion and plasticizing quality, and the metering homogenizing zone that has the pineapple mixing refining head helps mixing homogenizing.The screw rod of this utility model is fit to the processing of more multiple material, and versatility is stronger, and the quality of moulded products is better.Yet; This screw rod does not solve the wear-resisting problem of screw rod; The scope of application does not have specific aim yet; The plastics strong to some abradabilityes, that corrodibility is big; Possibly can't take into account two aspects; Can cause to waste raw material, improve production cost, the relatively poor problem of result of use, so the making method of this screw rod also needs to improve.
Summary of the invention
Technical problem to be solved by this invention is the making method that a kind of wear-resisting and anticorrosive strong a kind of screw rod is provided to above-mentioned prior art present situation.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: the making method of this screw rod is characterized in that: may further comprise the steps:
One, selects materials, choose the metal bar of well known materials FDAC or SLD or DC53, by given specification and length blanking;
Two, corase grind is pressed the plus tolerance 1mm of drawing specification with the corase grind of the metal bar after the blanking to each position;
Three, screw rod is made, and the metal bar after the roughing is milled screw channel and keyseat by drawing, forms screw rod (1) crude green body;
Four, the screw rod crude green body vacuum hardening after will polishing is handled, and makes its hardness reach HRC52～60, and the screw rod crude green body after will quenching is again proofreaied and correct, the precision of each cylindrical to drawing requirement of polishing;
Five, the screw rod crude green body after will proofreading and correct is put into gas nitriding furnace and is carried out nitriding treatment; The step of nitriding treatment is: at first the screw rod crude green body is heated to 500～535 ℃; Control nitrogenize rate of decomposition is between 20～28%; Insulation to 23.6～24.4 hour; Then the screw rod crude green body is further heated to 545～560 ℃; Control nitrogenize rate of decomposition is between 50～55%; Insulation to 49.6～50.4 hour; At last; The screw rod crude green body is further heated to 565～570 ℃ again; Control nitrogenize rate of decomposition is incubated 1～2 hour between 90～95%.
Six, the screw rod crude green body after the nitrogenize is finish grinded, polishes,, be the screw rod finished product until the size of drawing requirement.
The step of vacuum hardening is in the above-mentioned steps four: one, earlier screw rod is positioned in the vacuum oven, is warming up to 550～600 ℃, be incubated 1.5～2 hours, and two, in vacuum oven, make screw rod be warming up to 850～900 ℃ then, be incubated 1～2 hour; Three, then continue in vacuum oven, screw rod to be warming up to 1000～1200 ℃, screw rod is warming up to 1000～1200 ℃ soaking time and does; By screw diameter is to be calculating in 20～50 minutes its hold-time of every 25mm; Four, extruder temperature stops to feed nitrogen when feeding nitrogen is cooled to 90～100 ℃ with the screw rod in the vacuum oven in described vacuum oven after 1000～1200 ℃ of insulations, makes screw rod in vacuum oven, naturally cool to 30～50 ℃; Five, will be cooled to 30～50 ℃ of screw rods and in vacuum oven, be warming up to 540～560 ℃; Be incubated 2～2.5 hours; Then screw rod is naturally cooled to 30～50 ℃ again in vacuum oven; Repeat above-mentioned steps; After the hardness of screw rod to be detected reaches HRC52～60; Screw rod is taken out from vacuum oven, promptly accomplish the step of vacuum hardening.
After screw rod crude green body after quenching in the above-mentioned steps four was proofreaied and correct and polished, the diameter that makes the screw rod cylindrical was the plus tolerance 0.05mm of drawing specification.
Polishing in the above-mentioned steps six is polished processing through the diamond abrasive band to screw rod, and said correct grinding carries out ground finish on diamond wheel.
Screw rod made in the above-mentioned steps six is before warehouse-in, and rust preventing grease or lacquer on the surfaces coated of screw rod are packed warehouse-in again.
Compared with prior art; The invention has the advantages that: with vacuum hardening and the nitriding treatment of screw rod through this technology; Integral hardness reaches HRC52～60 (HRC52～60 are meant the hardness marker method of international standard); Surface hardness reaches HV900; This makes screw rod that very high wear resisting property arranged; Can satisfy the corrosion engineering plastics that add 35% following glass; It is to anti-material wearing and tearing and the screw rod of design; When the plastics of 35% following glass had been added in processing, be existing more than three times of bimetal screw rod the work-ing life of screw rod.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Shown in figure one, the making method of screw rod 1 of the present invention may further comprise the steps:
One, selects materials, choose the metal bar of well known materials FDAC or SLD or DC53, by given specification and length blanking; Described FDAC or SLD or DC53 metallic substance can retrieve on the net;
Two, corase grind is pressed the plus tolerance 1mm of drawing specification with the corase grind of the metal bar after the blanking to each position;
Three, make screw rod 1, the metal bar after the roughing is milled screw channel and keyseat by drawing, form screw rod 1 crude green body;
Four, the screw rod 1 crude green body vacuum hardening after will polishing is handled, and makes its hardness reach HRC52～60, and screw rod 1 crude green body after will quenching is again proofreaied and correct, and each cylindrical to diameter of polishing is the positive 0.05mm of drawing specification; Wherein, the step of vacuum hardening is: one, earlier screw rod 1 is positioned in the vacuum oven, is warming up to 550～600 ℃, be incubated 1.5～2 hours, and two, in vacuum oven, make screw rod 1 be warming up to 850～900 ℃ then, be incubated 1～2 hour; Three, then continue in vacuum oven, screw rod 1 to be warming up to 1000～1200 ℃, screw rod 1 is warming up to 1000～1200 ℃ soaking time and does; By screw diameter is to be calculating in 20～50 minutes its hold-time of every 25mm; Four, screw rod 1 temperature stops to feed nitrogen when feeding nitrogen is cooled to 90～100 ℃ with the screw rod in the vacuum oven 1 in described vacuum oven after 1000～1200 ℃ of insulations, makes screw rod 1 in vacuum oven, naturally cool to 30～50 ℃; Five, will be cooled to 30～50 ℃ of screw rods 1 and in vacuum oven, be warming up to 540～560 ℃; Be incubated 2～2.5 hours; Then screw rod 1 is naturally cooled to 30～50 ℃ again in vacuum oven; After the repetition above-mentioned steps three times; After the hardness of detection screw rod 1 reaches HRC52～60; Screw rod 1 is taken out from vacuum oven, promptly accomplish the step of vacuum hardening; Said is that every 25mm keeps 20～50 minutes Calculation Method by screw rod 1 diameter, is 30mm like: diameter, and then the hold-time is 24-60 minute.
Five; Screw rod 1 crude green body after proofreading and correct is put into gas nitriding furnace carry out nitriding treatment; The step of nitriding treatment is: at first screw rod 1 crude green body is heated to 500 ℃～535 ℃; Control nitrogenize rate of decomposition is between 20%～28%; Insulation to 23.6～24.4 hour; Then screw rod 1 crude green body is further heated to 545 ℃～560 ℃; Control nitrogenize rate of decomposition is between 50%～55%; Insulation to 49.6～50.4 hour; At last; Screw rod 1 crude green body is further heated to 565 ℃～570 ℃ again; Control nitrogenize rate of decomposition is incubated 1～2 hour between 90%～95%;
Six, 1 crude green body of the screw rod after the nitrogenize is polished screw rod through the diamond abrasive band, and on diamond wheel, carry out ground finish, until the size of drawing requirement; Then before warehouse-in; Rust preventing grease or lacquer on the surfaces coated of screw rod 1, the packing warehouse-in is screw rod 1 finished product again.
Described plus tolerance is meant the meaning that screw rod is big or thicker than normal diameter, is 200mm like the normal diameter of drawing, and its plus tolerance is the screw rod of 0.05mm, and then its diameter should be 200+0.05 * 2=200.1mm, and is as follows.
Claims (5)
1. the making method of a screw rod is characterized in that: may further comprise the steps:
One, selects materials, choose the metal bar of well known materials FDAC or SLD or DC53, by given specification and length blanking;
Two, corase grind is pressed the plus tolerance 1mm of drawing specification with the corase grind of the metal bar after the blanking to each position;
Three, screw rod is made, and the metal bar after the roughing is milled screw channel and keyseat by drawing, forms screw rod (1) crude green body;
Four, screw rod (1) the crude green body vacuum hardening after will polishing is handled, and makes its hardness reach HRC52～60, and screw rod (1) crude green body after will quenching is again proofreaied and correct the precision of each cylindrical to drawing requirement of polishing;
Five, screw rod (1) crude green body after will proofreading and correct is put into gas nitriding furnace and is carried out nitriding treatment; The step of nitriding treatment is: at first screw rod (1) crude green body is heated to 500～535 ℃; Control nitrogenize rate of decomposition is between 20～28%; Insulation to 23.6～24.4 hour; Then screw rod (1) crude green body is further heated to 545～560 ℃; Control nitrogenize rate of decomposition is between 50～55%; Insulation to 49.6～50.4 hour; At last screw rod (1) crude green body is further heated to 565～570 ℃ again; Control nitrogenize rate of decomposition is incubated 1～2 hour between 90～95%;
Six, the screw rod after the nitrogenize (1) crude green body is finish grinded, polishes,, be screw rod (1) finished product until the size of drawing requirement.
2. making method according to claim 1; It is characterized in that: the step of vacuum hardening is in the said step 4: one, earlier screw rod (1) is positioned in the vacuum oven; Be warming up to 550～600 ℃; Be incubated 1.5～2 hours; Two, in vacuum oven, make screw rod (1) be warming up to 850～900 ℃ then, be incubated 1～2 hour; Three, then continue in vacuum oven, screw rod (1) to be warming up to 1000～1200 ℃, screw rod (1) is warming up to 1000～1200 ℃ soaking time and does; By screw diameter is to be calculating in 20～50 minutes its hold-time of every 25mm; Four, screw rod (1) temperature stops to feed nitrogen when feeding nitrogen is cooled to 90～100 ℃ with the screw rod in the vacuum oven (1) in described vacuum oven after 1000～1200 ℃ of insulations, makes screw rod (1) in vacuum oven, naturally cool to 30～50 ℃; Five, will be cooled to 30～50 ℃ of screw rods (1) and in vacuum oven, be warming up to 540～560 ℃; Be incubated 2～2.5 hours; Then screw rod (1) is naturally cooled to 30～50 ℃ again in vacuum oven; Repeat above-mentioned steps; After the hardness of screw rod to be detected (1) reaches HRC52～60; Screw rod (1) is taken out from vacuum oven, promptly accomplish the step of vacuum hardening.
3. making method according to claim 1 is characterized in that: after screw rod (1) crude green body after quenching in the said step 4 was proofreaied and correct and polished, the diameter that makes the screw rod cylindrical was the plus tolerance 0.05mm of drawing specification.
4. making method according to claim 1 is characterized in that: the polishing in the said step 6 is polished processing through the diamond abrasive band to screw rod (1), and said correct grinding carries out ground finish on diamond wheel.
5. making method according to claim 1 is characterized in that: screw rod (1) made in the said step 6 is before warehouse-in, and rust preventing grease or lacquer on the surfaces coated of screw rod (1) are packed warehouse-in again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102287214A CN102345006B (en) | 2011-08-10 | 2011-08-10 | Method for manufacturing screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102287214A CN102345006B (en) | 2011-08-10 | 2011-08-10 | Method for manufacturing screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102345006A true CN102345006A (en) | 2012-02-08 |
| CN102345006B CN102345006B (en) | 2013-06-26 |
Family
ID=45544077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102287214A Active CN102345006B (en) | 2011-08-10 | 2011-08-10 | Method for manufacturing screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102345006B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103042359A (en) * | 2012-09-11 | 2013-04-17 | 昌利锻造有限公司 | Method for forging screw for extruding machine |
| CN105235188A (en) * | 2015-10-28 | 2016-01-13 | 浙江光明塑料机械有限公司 | Cone double barrel |
| CN113846284A (en) * | 2021-08-27 | 2021-12-28 | 沈阳透平机械股份有限公司 | Ion nitriding process for 25Cr2Ni3Mo material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0584807A (en) * | 1991-09-27 | 1993-04-06 | Toshiba Mach Co Ltd | Manufacture of screw for plastic molding |
| JPH0780911A (en) * | 1993-09-09 | 1995-03-28 | Hitachi Metals Ltd | Manufacture of screw segment and composite column or cylinder |
| CN101439459A (en) * | 2008-12-17 | 2009-05-27 | 赵援宁 | Method and equipment for manufacturing screw rod |
| CN100564120C (en) * | 2004-11-12 | 2009-12-02 | Ims传动装置有限公司 | Screw rod |
-
2011
- 2011-08-10 CN CN2011102287214A patent/CN102345006B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0584807A (en) * | 1991-09-27 | 1993-04-06 | Toshiba Mach Co Ltd | Manufacture of screw for plastic molding |
| JPH0780911A (en) * | 1993-09-09 | 1995-03-28 | Hitachi Metals Ltd | Manufacture of screw segment and composite column or cylinder |
| CN100564120C (en) * | 2004-11-12 | 2009-12-02 | Ims传动装置有限公司 | Screw rod |
| CN101439459A (en) * | 2008-12-17 | 2009-05-27 | 赵援宁 | Method and equipment for manufacturing screw rod |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103042359A (en) * | 2012-09-11 | 2013-04-17 | 昌利锻造有限公司 | Method for forging screw for extruding machine |
| CN105235188A (en) * | 2015-10-28 | 2016-01-13 | 浙江光明塑料机械有限公司 | Cone double barrel |
| CN113846284A (en) * | 2021-08-27 | 2021-12-28 | 沈阳透平机械股份有限公司 | Ion nitriding process for 25Cr2Ni3Mo material |
| CN113846284B (en) * | 2021-08-27 | 2024-01-19 | 沈阳透平机械股份有限公司 | Ion nitriding process for 25Cr2Ni3Mo material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102345006B (en) | 2013-06-26 |
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Effective date of registration: 20160322 Address after: 316032, 26-28, Xin Qiao Road, Lek port, Jintang Town, Dinghai District, Zhejiang, Zhoushan Patentee after: Zhejiang Refined Machinery Co., Ltd. Address before: 316032, 26-28, Xin Qiao Road, Lek port, Jintang Town, Dinghai District, Zhejiang, Zhoushan Patentee before: Zhou Jianjun |