CN104227511A - Tool polishing method - Google Patents
Tool polishing method Download PDFInfo
- Publication number
- CN104227511A CN104227511A CN201310247001.1A CN201310247001A CN104227511A CN 104227511 A CN104227511 A CN 104227511A CN 201310247001 A CN201310247001 A CN 201310247001A CN 104227511 A CN104227511 A CN 104227511A
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- Prior art keywords
- polishing
- quality
- mold
- sand paper
- die
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
- B24B1/04—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes subjecting the grinding or polishing tools, the abrading or polishing medium or work to vibration, e.g. grinding with ultrasonic frequency
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/20—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding dies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention provides a tool polishing method and belongs to the technical field of die and mold manufacture. The tool polishing method according to the technical includes: after the surface of a die or mold is subjected to milling, electric spark machining and grinding, using a rotating surface polisher or an ultrasonic polisher rotating at the speed of 35000-40000rpm to perform rough polishing; performing semi-finish polishing sequentially with abrasive papers numbered with #400, #600, #800, #1000, #1200 and #1500; using a buffing wheel and diamond abrasive powders or abrasive pastes to perform finish polishing. Since mechanical polishing mainly relies in manual operations, the polishing technology presently is a main cause affecting the polishing quality; besides, the polishing quality is also related to die and mold materials, pre-polishing surface condition, heat treatment and the like; high-quality steel is a precondition to acquire good polishing quality.
Description
Technical field
The invention belongs to technology of die manufacturing field, particularly relate to a kind of method of mold polish.
Background technology
Polishing is a very important procedure in Mold Making process, also be the work of showdown, to overflow day along with plastic products extensive use, require also more and more higher to the exterior quality of plastic products, so the surface finish quality of plastic mold cavity also wants corresponding raising, particularly the mould on minute surface and the highlighted surface of high light requires higher, thus also higher to the requirement of polishing to mold surface roughness.Polishing not only increases the attractive in appearance of workpiece, and can improve corrosion resistance, the wearability of material surface, can also be convenient to follow-up injection molding, as made plastic products be easy to the demoulding, reducing and producing injection cycle etc.
In mould of plastics processing in said polishing and other industry required by surface finish be very different, strictly speaking, the polishing of mould should be called mirror finish.It not only has very high requirement to polishing itself and effects on surface flatness, smoothness and geometrical accuracy also have very high standard.The surface obtaining light is generally only required in surface finish.
The standard of mirror finish is divided into level Four: AO=Ra0.008 μm, A1=Ra0.016 μm, A3=Ra0.032 μm, A4=Ra0.063 μm, because the method such as electrobrightening, fluid polishing is difficult to the geometrical accuracy accurately controlling part, and the surface quality of the methods such as chemical polishing, ultrasonic polishing, magnetic grinding and polishing does not reach requirement, so the mirror finish of precision die is still based on machine glazed finish.
Summary of the invention
The invention provides a kind of method of mold polish, realized by following technical proposals:
(1) die surface after milling, electric spark, grinding process, selects rotating speed to carry out rough polishing at the surface of revolution polishing machine of 35 000-40 000 rpm or ultrasonic wave grinder;
(2) use number is successively: the sand paper of #400, #600, #800, #1000, #1200 and #1500 carries out half essence and throws;
(3) carry out grinding essence with buff mixing diamond abrasive powder or abrasive pastes to throw.
Because machine glazed finish is mainly still by manually completing, so polishing technology still affects the main cause of quality of finish at present, in addition, also relevant with surface appearance, Technology for Heating Processing etc. before mold materials, polishing, the steel of high-quality are the preconditions obtaining excellent polishing quality.
Detailed description of the invention
Below by specific embodiment, the present invention is further illustrated.
Machine glazed finish be by cutting, material surface plastic deformation remove polished after protuberance and obtain the finishing method of even surface, general use oilstone bar, wool wheel, sand paper etc., based on manual operations, peculiar part is as revolving body surface, the aids such as turntable can be used, the method for the adopted superfinishing polishing that surface quality requirements is high.Superfinishing polishing adopts special grinding tool, in the polishing liquid containing abrasive material, is pressed on workpiece surface to be machined, makes high speed rotary motion.Utilizing this technology can reach the surface roughness of Ra0.008 μm, is the highest in various finishing method.Optical lens die is often adopted in this way.
(1) machine glazed finish base program wants to obtain high-quality polishing effect, the most important thing is to have polishing tool and the supplements such as high-quality oilstone, sand paper and diamond abrasive cream.And the surface appearance after processing early stage is depended in the selection of polishing program, as machining, spark machined, mill processing etc.
The process of machine glazed finish is as follows:
1. the surface of rough polishing after the techniques such as milling, electric spark, mill can select rotating speed to carry out polishing at the surface of revolution polishing machine of 35 000-40 000 rpm or ultrasonic wave grinder.Conventional method have utilize diameter of phi 3mm, the wheel of WA # 400 removes white electric spark layer.Then be the grinding of manual oilstone, strip oilstone adds kerosene as lubricant or cooling agent.General use order is #180 ~ #240 ~ #320 ~ #400 ~ #600 ~ #800 ~ #1000.Many die casting producers are selected from #400 to save time.
2. half essence throws main use sand paper and kerosene.A number number for sand paper is followed successively by: #400 ~ #600 ~ #800 ~ #1000 ~ #1200 ~ #1500.In fact #1500 sand paper is only with the mould steel (more than 52HRC) being suitable for hardening, and is not suitable for perhardened steel, because may cause perhardened steel part scorch like this.
3. essence is thrown essence throwing and is mainly used diamond abrasive cream.If carry out grinding with buff mixing diamond abrasive powder or abrasive pastes, then common grinding order is μm (#3000) ~ 3,9 μm of (#1800) ~ 6 μm (#8000).The diamond abrasive cream of 9 μm and buff can be used to the hair-like polishing scratch that removal #1200 and #1500 sand paper stays.Then carry out polishing with sticky felt and diamond abrasive cream, order is μm (#60000) ~ 1/4,1 μm of (#14000) ~ 1/2 μm (#100000).
The glossing that required precision (comprises 1 μm) more than 1 μm can carry out in a clean polishing room in Mould Machining workshop.If carry out more accurate polishing, a required absolute clean space.Dust, smog, the high precision polishing surface that dandruff and saliva foam obtain after all likely scrapping work in several hours.
(2) the skill in machine glazed finish
I with sand paper polishing should note following some:
1. need to utilize soft wooden stick or bamboo rod with sand paper polishing.When polishing disc or sphere, use cork rod better can coordinate the radian of disc and sphere.And harder batten is as cherry, be then more suitable for the polishing of flat surface.The end of finishing batten can coincide with steel piece surface form trait, and the acute angle of batten (or bamboo cane) can be avoided like this to contact steel piece surface and cause darker cut.
2. when using the sand paper of different model instead, polishing direction should convert 45 ° ~ 90 °, and the striped shade stayed after the polishing of a kind of model sand paper like this can distinguish.Before changing different model sand paper, careful wiping must be carried out with the cleaning solution that 100% textile flower picks alcohol and so on to polished surface, because a very little grit stays surface all can damage subsequent whole polishing.When changing the polishing of diamond abrasive cream into from sand paper polishing, this cleaning course no less important.Before polishing proceeds, all particles and kerosene all must by completely clean clean.
3. in order to avoid scratch and burn surface of the work, must SC when carrying out polishing with #1200 and #1500 sand paper.Thus be necessary loading underload and adopt two step CMP method effects on surface to carry out polishing.All twice polishing should be carried out along two different directions, each rotation 45 ° ~ 90 ° between both direction when carrying out polishing with the sand paper of each model.
II diamond abrasive polishing should note following some:
1. this polishing must carry out under lighter pressure as far as possible particularly polishing perhardened steel part and with fine paste polishing time.When with the polishing of #8000 abrasive pastes, conventional load is 100 ~ 200g/cm2, but the precision of this load will be kept to be difficult to accomplish.In order to more easily accomplish this point, a thin and narrow handle can be made on batten, such as add a copper sheet; Or in bamboo cane, cut a part and make it more soft.Can help like this to control polish pressure, to guarantee that die face pressure can not be too high.
2. when using diamond abrasive polishing, be not only working surface requirement clean, the both hands of worker also must be carefully clean.
3. each polishing time should be not long, and the time is shorter, and effect is better.If polishing process carries out longly will to cause " orange peel " and " spot corrosion ".
4. for obtaining high-quality polishing effect, finishing method and the instrument of easily heating all should be avoided.Such as: polishing wheel polishing, the heat that polishing wheel produces can be easy to cause " orange peel ".
When polishing process stops, ensureing that surface of the work cleaning and all grinding agents of careful removal and lubricant are extremely important, subsequently should at surface spraying one deck mould antirust coat.Because machine glazed finish is mainly still by manually completing, so polishing technology still affects the main cause of quality of finish at present.In addition, also relevant with surface appearance, Technology for Heating Processing etc. before mold materials, polishing.The steel of high-quality are the preconditions obtaining excellent polishing quality, if steel surface hardness is uneven or variant in characteristic, often produce polishing difficulty.Various field trash in steel and pore are all unfavorable for polishing.
(3) the affect hardness of different hardness on glossing increases the difficulty of grinding is increased, but the roughness after polishing reduces.Due to increasing of hardness, the lower corresponding growth of the polishing time needed for roughness be reached.Hardness increases simultaneously, the corresponding minimizing of possibility that polishing is excessive.
(4) surface of the work situation affecting in the shattering process that steel process at cutting machine glossing, top layer can be damaged because of heat, internal stress or other factors, and cutting parameter is improper can affect polishing effect.Surface ratio standard machinery processing after spark machined or the more difficult grinding in surface after heat treatment, therefore spark machined should adopt accurate electric spark shaving before terminating, otherwise surface can form harden coating.If the accurate selection of electric spark refine rule is improper, the degree of depth of heat affected layer is maximum reaches 0.4mm.The hardness ratio matrix hardness of harden coating is high, must remove.Therefore preferably increase and roughly grind processing together, thoroughly remove damaging surface layer, form the metal covering of a slice average roughness, for polishing provides a good basis.
Claims (3)
1. a method for mold polish, is characterized in that comprising the following steps:
(1) die surface after milling, electric spark, grinding process, selects rotating speed to carry out rough polishing at the surface of revolution polishing machine of 35 000-40 000 rpm or ultrasonic wave grinder;
(2) use number is successively: the sand paper of #400, #600, #800, #1000, #1200 and #1500 carries out half essence and throws;
(3) carry out grinding essence with buff mixing diamond abrasive powder or abrasive pastes to throw.
2. the method for mold polish according to claim 1, is characterized in that: step (2), before changing different model sand paper, must pick alcohol with 100% textile flower and carry out careful wiping cleaning to polished surface.
3. the method for mold polish according to claim 1, is characterized in that: step (2) when using the sand paper of different model instead, polishing direction transformation 45 ° ~ 90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310247001.1A CN104227511A (en) | 2013-06-21 | 2013-06-21 | Tool polishing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310247001.1A CN104227511A (en) | 2013-06-21 | 2013-06-21 | Tool polishing method |
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| CN104227511A true CN104227511A (en) | 2014-12-24 |
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| CN201310247001.1A Pending CN104227511A (en) | 2013-06-21 | 2013-06-21 | Tool polishing method |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106737211A (en) * | 2016-12-01 | 2017-05-31 | 上海金豹实业股份有限公司 | A kind of die surface processing method for improving automobile-used rubber blanket product surface quality |
| CN107584406A (en) * | 2017-10-20 | 2018-01-16 | 苏州市天星山精密模具有限公司 | A kind of injection mold glossing |
| CN108942547A (en) * | 2018-06-30 | 2018-12-07 | 三砥新材（深圳）有限公司 | The polishing method and manufacturing method of graphite jig |
| CN109093538A (en) * | 2018-08-24 | 2018-12-28 | 成都时代立夫科技有限公司 | A kind of CMP pad treatment process |
| CN110449480A (en) * | 2019-08-26 | 2019-11-15 | 宁波思明汽车附件有限公司 | It is a kind of for processing the mold and its manufacturing method of valve cock blank |
| CN111195833A (en) * | 2020-01-21 | 2020-05-26 | 韩瑞来 | Polishing method for stone carving and grinding of scagliola |
| CN112548856A (en) * | 2020-12-04 | 2021-03-26 | 东北特殊钢集团股份有限公司 | Method for testing polishing property of large plastic die steel |
| CN112894591A (en) * | 2021-01-14 | 2021-06-04 | 沈阳航空航天大学 | Polishing process for aviation metal material |
| CN113021084A (en) * | 2021-03-17 | 2021-06-25 | 惠州标点扣具科技有限公司 | Machining method of forming die for plastic fastener production |
| CN113305651A (en) * | 2021-06-30 | 2021-08-27 | 浙江昊杨新能源科技有限公司 | Surface polishing process for battery plastic shell injection mold |
| CN114193239A (en) * | 2021-12-15 | 2022-03-18 | 深圳市南和建毅模具有限公司 | Mold core processing technology |
| CN115139191A (en) * | 2022-09-05 | 2022-10-04 | 歌尔光学科技有限公司 | Polishing method of optical lens mould core |
| CN115213796A (en) * | 2022-08-11 | 2022-10-21 | 安徽光智科技有限公司 | Die polishing method |
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| CN101486044A (en) * | 2009-02-20 | 2009-07-22 | 宝钢集团常州轧辊制造公司 | Method for producing restraint core rod of diameter above 330mm for tandem rolling tube |
| CN102806510A (en) * | 2012-08-14 | 2012-12-05 | 西北工业大学 | Numerically controlled polishing method for titanium alloy blade of aircraft engine |
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2013
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Non-Patent Citations (1)
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106737211A (en) * | 2016-12-01 | 2017-05-31 | 上海金豹实业股份有限公司 | A kind of die surface processing method for improving automobile-used rubber blanket product surface quality |
| CN107584406A (en) * | 2017-10-20 | 2018-01-16 | 苏州市天星山精密模具有限公司 | A kind of injection mold glossing |
| CN108942547A (en) * | 2018-06-30 | 2018-12-07 | 三砥新材（深圳）有限公司 | The polishing method and manufacturing method of graphite jig |
| CN109093538A (en) * | 2018-08-24 | 2018-12-28 | 成都时代立夫科技有限公司 | A kind of CMP pad treatment process |
| CN110449480B (en) * | 2019-08-26 | 2024-05-10 | 宁波思明汽车附件有限公司 | Die for machining inflating valve blank and manufacturing method thereof |
| CN110449480A (en) * | 2019-08-26 | 2019-11-15 | 宁波思明汽车附件有限公司 | It is a kind of for processing the mold and its manufacturing method of valve cock blank |
| CN111195833A (en) * | 2020-01-21 | 2020-05-26 | 韩瑞来 | Polishing method for stone carving and grinding of scagliola |
| CN112548856A (en) * | 2020-12-04 | 2021-03-26 | 东北特殊钢集团股份有限公司 | Method for testing polishing property of large plastic die steel |
| CN112894591A (en) * | 2021-01-14 | 2021-06-04 | 沈阳航空航天大学 | Polishing process for aviation metal material |
| CN113021084A (en) * | 2021-03-17 | 2021-06-25 | 惠州标点扣具科技有限公司 | Machining method of forming die for plastic fastener production |
| CN113305651A (en) * | 2021-06-30 | 2021-08-27 | 浙江昊杨新能源科技有限公司 | Surface polishing process for battery plastic shell injection mold |
| CN114193239A (en) * | 2021-12-15 | 2022-03-18 | 深圳市南和建毅模具有限公司 | Mold core processing technology |
| CN115213796A (en) * | 2022-08-11 | 2022-10-21 | 安徽光智科技有限公司 | Die polishing method |
| CN115139191A (en) * | 2022-09-05 | 2022-10-04 | 歌尔光学科技有限公司 | Polishing method of optical lens mould core |
| CN115139191B (en) * | 2022-09-05 | 2022-11-22 | 歌尔光学科技有限公司 | Polishing method of optical lens mould core |
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Application publication date: 20141224 |
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