CN109079142A - It is a kind of to utilize the molding MIM processing technology of laser assisted - Google Patents
It is a kind of to utilize the molding MIM processing technology of laser assisted Download PDFInfo
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- CN109079142A CN109079142A CN201810557379.4A CN201810557379A CN109079142A CN 109079142 A CN109079142 A CN 109079142A CN 201810557379 A CN201810557379 A CN 201810557379A CN 109079142 A CN109079142 A CN 109079142A
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- laser
- warm area
- molding
- sintering
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
- B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1017—Multiple heating or additional steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
Abstract
A kind of to utilize the molding MIM processing technology of laser assisted, the present invention relates to MIM technology fields；Its operating procedure is as follows: MIM injection mold design, and is injection moulded product using injection technique using injector；Product after molding is cut by laser using laser machine, is cut by laser required shape；Laser assisted product after molding is sintered using sintering process, obtains finished product.The high precision design requirement for meeting product development process solves the problems, such as in production process mold because of die wear and die life caused by under long-term big pressure condition, saves labour turnover, improving production efficiency.
Description
Technical field
The present invention relates to MIM technology fields, and in particular to a kind of to process work using the molding MIM of laser assisted
Skill.
Background technique
MIM technical matters has precision height, even tissue, has excellent performance, mass degree height etc. compared with traditional handicraft
Feature.In the world, it is many also to have been widely used for automobile, electronic product, medical instrument, consumer goods etc. for MIM technique
Field.
The designs such as the lesser through-hole of some sizes (round or ellipse) in current certain structures show as touching on mold wears
Needle or the small structure such as touch prick post, are limited, mold, which touches, threads a needle or touch prick post structure for a long time big by conditions such as mold materials and techniques
Under the conditions of pressure injection, touching the face of wearing can be badly damaged, and cause product corresponding position to occur making a variation or burr or more material, actual production
Process needs to put into a large amount of manpower and material resources and removes it, and seriously affects production efficiency, can not fundamentally solve, and these problems are
Most frequent one of the problem of the inevitable occurrence probability that volume production mold faces.Separately it also will receive technique in mold processing
Limitation, need to increase pattern draft, otherwise can not hold in the palm mould.Pattern draft i.e. draw taper are in order to facilitate depanning and in mould
The gradient of thorax two sides design, in order to allow molded product that can smoothly eject break away from moulds, in the wall surface with the mold opening and closing same direction
(including side core and ribs), it is necessary to set pattern draft with benefit demoulding, pattern draft is in actual production process must can not
It is few, however pattern draft cause the size at structural member root and tail portion both ends can variant presence, difference can also be with highly
Increase with gradient and increase, this has just deviated from the original intention of product design, and similar structures conventional machining process is caused to be unable to satisfy
The high-precision size requirement of design, therefore, novel forming scheme is extremely urgent.
Summary of the invention
In view of the defects and deficiencies of the prior art, the present invention intends to provide a kind of structure is simple, design rationally, make
With the molding MIM processing technology of laser assisted is easily utilized, meets the high precision design requirement of product development process, solve
Mold saves labour turnover, mentions because of die wear and die life problem caused by under long-term big pressure condition in production process
Rise production efficiency.
To achieve the above object, the technical solution adopted by the present invention is that: its operating procedure is as follows:
1, mold forms: MIM injection mold design, and is injection moulded product using injection technique using injector；
2, laser assisted forms: being cut by laser using laser machine to product after molding, is cut by laser required shape
Shape；
3, sintering finished: laser assisted product after molding being sintered using sintering process, obtains finished product.
Further, the injection technique in the step 1 is divided into six sections of injections, wherein second segment, third section and
Four sections of injection temperature is that 185 ± 40 DEG C, the 5th section and the 6th section of injection temperature is 190 ± 20 DEG C；Dynamic model oil in injector
Temperature is 80 ± 40 DEG C, and the oil temperature of cover half is 80 ± 20 DEG C.
Further, in the step 2 laser machine power be 50W, optical maser wavelength 1064nm, light velocity quality <
1.2, minimum feature 0.02mm, cutting speed≤15000mm/s, repeatable accuracy be ± 0.001mm, power consumption 600V,
Electricity needs is Ac220V.
Further, the sintering process in the step 3 expects sintering process using tube furnace Cu, and whole process is passed through hydrogen,
It is divided into nine sintering stages, i.e. first segment, and warm area is room temperature to 600 DEG C, sintering time 200-300min, second segment, warm area
It being kept the temperature for 600 DEG C, soaking time 60-90min, third section warm area is 600 DEG C to 800 DEG C, and sintering temperature is 90-150 DEG C, the
Four sections of warm areas are 800 DEG C of heat preservations, and soaking time is 60min, and the 5th section of warm area is 800 DEG C to 950 DEG C, and sintering time is
90min, the 6th section of warm area are 950 DEG C of heat preservations, soaking time 45min, and the 7th section of warm area is 950 DEG C to the highest temperature, when sintering
Between be 60min, the 8th section of warm area is that the highest temperature is kept the temperature, and soaking time 60-90min, the 9th section of warm area is natural cooling, cold
But continue to be passed through hydrogen during, and pressure is maintained at 50-86kp.
The working principle of the invention: using the principle of laser cutting, scaling off product excess stock using laser, due to
The characteristic of laser, so that product to be processed has fine and smooth notch, higher precision and the neat mouth of a river, and efficiency is non-
Normal height.
After above-mentioned technique, the invention has the following beneficial effects:
1, meet product development process high precision design requirement (traditional handicraft for guarantee injection process in product smoothly from
Mold cavity support mould, corresponding die location must increase pattern draft)；
2, mold is solved the problems, such as in production process because of die wear and die life caused by under long-term big pressure condition
(traditional handicraft mold, which touches, threads a needle or touches the small structure such as prick post, is influenced by factors such as mold materials and injecting conditions, on mold this
A little small structures are for a long time under the conditions of injecting the big pressure tonnage of board, and mould touches the face of wearing after opening and closing for a long time and can seriously receive before and after small structure
It is collapsed to abrasion and corner, such as circled positions, repairing a die repeatedly is the key factor for influencing die life)；
3, it saves labour turnover, (traditional handicraft mold is for a long time in the big pressure tonnage item of injection board for improving production efficiency
Under part, after abrasion, the problem of most serious is most complained is faced for production and is exactly that will appear burr etc. bad for corresponding product, and
And be that batch volume production process encounters most frequent least evitable problem, actual production process is needed to get rid of burr etc., be gone
Fall this process of burr to need additionally to increase manually, and manually going burr process is most to influence production efficiency and practical station to scrap
Rate).
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is the process parameter table of step 1 in the present invention.
Fig. 2 is the process parameter table of step 2 in the present invention.
Fig. 3 is the process parameter table of step 3 in the present invention.
Specific embodiment
The present invention will be further described below with reference to the drawings.
Referring to as shown in Figure 1-Figure 3, present embodiment the technical solution adopted is that: the technical solution adopted is that: it
Operating procedure it is as follows:
1, mold forms: MIM injection mold design, and is injection moulded product using injection technique using injector；
2, laser assisted forms: being cut by laser using laser machine to product after molding, is cut by laser required shape
Shape；
3, sintering finished: laser assisted product after molding being sintered using sintering process, obtains finished product.
Further, the injection technique in the step 1 is divided into six sections of injections, wherein second segment, third section and
Four sections of injection temperature is that 185 ± 40 DEG C, the 5th section and the 6th section of injection temperature is 190 ± 20 DEG C；Dynamic model oil in injector
Temperature is 80 ± 40 DEG C, and the oil temperature of cover half is 80 ± 20 DEG C.
Further, in the step 2 laser machine power be 50W, optical maser wavelength 1064nm, light velocity quality <
1.2, minimum feature 0.02mm, cutting speed≤15000mm/s, repeatable accuracy be ± 0.001mm, power consumption 600V,
Electricity needs is Ac220V.
Further, the sintering process in the step 3 expects sintering process using tube furnace Cu, and whole process is passed through hydrogen,
It is divided into nine sintering stages, i.e. first segment, and warm area is room temperature to 600 DEG C, sintering time 200-300min, second segment, warm area
It being kept the temperature for 600 DEG C, soaking time 60-90min, third section warm area is 600 DEG C to 800 DEG C, and sintering temperature is 90-150 DEG C, the
Four sections of warm areas are 800 DEG C of heat preservations, and soaking time is 60min, and the 5th section of warm area is 800 DEG C to 950 DEG C, and sintering time is
90min, the 6th section of warm area are 950 DEG C of heat preservations, soaking time 45min, and the 7th section of warm area is 950 ° DEG C to the highest temperature, when sintering
Between be 60min, the 8th section of warm area is that the highest temperature is kept the temperature, and soaking time 60-90min, the 9th section of warm area is natural cooling, cold
But continue to be passed through hydrogen during, and pressure is maintained at 50-86kp.
The working principle of this specific embodiment:: using the principle of laser cutting, product excess stock is cut using laser
Get off, due to the characteristic of laser, so that product to be processed has fine and smooth notch, higher precision and the neat mouth of a river, and
And efficiency is very high.
After above-mentioned technique, present embodiment has the beneficial effect that present embodiment provides a kind of utilization
The molding MIM processing technology of laser assisted, meets the high precision design requirement of product development process, solves mould in production process
Tool because it is long-term greatly under pressure condition caused by die wear and die life problem, save labour turnover, improving production efficiency,
The above is only used to illustrate the technical scheme of the present invention and not to limit it, and those of ordinary skill in the art are to this hair
The other modifications or equivalent replacement that bright technical solution is made, as long as it does not depart from the spirit and scope of the technical scheme of the present invention,
It is intended to be within the scope of the claims of the invention.
Claims (4)
1. a kind of utilize the molding MIM processing technology of laser assisted, it is characterised in that: its operating procedure is as follows:
(1), mold forms: MIM injection mold design, and is injection moulded product using injection technique using injector；
(2), laser assisted forms: being cut by laser using laser machine to product after molding, is cut by laser required shape；
(3), sintering finished: laser assisted product after molding being sintered using sintering process, obtains finished product.
2. a kind of utilization molding MIM processing technology of laser assisted according to claim 1, it is characterised in that: described
Injection technique in step (1) is divided into six sections of injections, wherein second segment, third section and the 4th section of injection temperature be 185 ±
40 DEG C, the 5th section and the 6th section of injection temperature is 190 ± 20 DEG C；Dynamic model oil temperature is 80 ± 40 DEG C in injector, the oil of cover half
Temperature is 80 ± 20 DEG C.
3. a kind of utilization molding MIM processing technology of laser assisted according to claim 1, it is characterised in that: described
The power of laser machine is 50W in step (2), and optical maser wavelength 1064nm, light velocity quality < 1.2, minimum feature 0.02mm cuts
Speed≤15000mm/s is cut, repeatable accuracy is ± 0.001mm, power consumption 600V, electricity needs Ac220V.
4. a kind of utilization molding MIM processing technology of laser assisted according to claim 1, it is characterised in that: described
Sintering process in step (3) expects sintering process using tube furnace Cu, and whole process is passed through hydrogen, is divided into nine sintering stages, i.e., the
One section, warm area is room temperature to 600 DEG C, sintering time 200-300min, and second segment, warm area is 600 DEG C of heat preservations, and soaking time is
60-90min, third section warm area are 600 DEG C to 800 DEG C, and sintering temperature is 90-150 DEG C, and the 4th section of warm area is 800 DEG C of heat preservations, and
Soaking time is 60min, and the 5th section of warm area is 800 DEG C to 950 DEG C, sintering time 90min, and the 6th section of warm area is 950 DEG C of guarantors
Temperature, soaking time 45min, the 7th section of warm area are 950 DEG C to the highest temperature, and sintering time 60min, the 8th section of warm area is highest
Temperature heat preservation, soaking time 60-90min, the 9th section of warm area is natural cooling, continues to be passed through hydrogen during cooling, and
Pressure is maintained at 50-86kp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810557379.4A CN109079142A (en) | 2018-06-01 | 2018-06-01 | It is a kind of to utilize the molding MIM processing technology of laser assisted |
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|---|---|---|---|
| CN201810557379.4A CN109079142A (en) | 2018-06-01 | 2018-06-01 | It is a kind of to utilize the molding MIM processing technology of laser assisted |
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| CN109079142A true CN109079142A (en) | 2018-12-25 |
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| CN201810557379.4A Pending CN109079142A (en) | 2018-06-01 | 2018-06-01 | It is a kind of to utilize the molding MIM processing technology of laser assisted |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111250710A (en) * | 2020-03-11 | 2020-06-09 | 深圳市富优驰科技有限公司 | Method for machining hollow-structure differential shell capable of preventing sintering deformation |
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| CN106118588A (en) * | 2016-06-29 | 2016-11-16 | 航天海鹰(哈尔滨)钛业有限公司 | For the injection molding binding agent of titanium alloy powder and the method for injection moulding titanium alloy component |
| CN206561123U (en) * | 2017-03-29 | 2017-10-17 | 惠州威博精密科技有限公司 | A kind of powder injection-molded mobile fingerprint decoration semi-finished product |
| CN107377977A (en) * | 2017-07-18 | 2017-11-24 | 东莞华晶粉末冶金有限公司 | The method and apparatus that a kind of MIM techniques make mobile phone Kato |
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2018
- 2018-06-01 CN CN201810557379.4A patent/CN109079142A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102076476A (en) * | 2008-08-05 | 2011-05-25 | Khs有限责任公司 | Method for the production of container cells |
| CN102672186A (en) * | 2012-06-07 | 2012-09-19 | 太仓市锦立得粉末冶金有限公司 | Manufacturing process for gear ring in powder metallurgy |
| CN106118588A (en) * | 2016-06-29 | 2016-11-16 | 航天海鹰(哈尔滨)钛业有限公司 | For the injection molding binding agent of titanium alloy powder and the method for injection moulding titanium alloy component |
| CN206561123U (en) * | 2017-03-29 | 2017-10-17 | 惠州威博精密科技有限公司 | A kind of powder injection-molded mobile fingerprint decoration semi-finished product |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111250710A (en) * | 2020-03-11 | 2020-06-09 | 深圳市富优驰科技有限公司 | Method for machining hollow-structure differential shell capable of preventing sintering deformation |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181225 |
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