CN109465444A - Sintering tool and method based on powder injection molding process manufacture slewing parts - Google Patents
Sintering tool and method based on powder injection molding process manufacture slewing parts Download PDFInfo
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- CN109465444A CN109465444A CN201811565868.0A CN201811565868A CN109465444A CN 109465444 A CN109465444 A CN 109465444A CN 201811565868 A CN201811565868 A CN 201811565868A CN 109465444 A CN109465444 A CN 109465444A
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- sintering
- raw embryo
- part raw
- wedge block
- powder injection
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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
- B22F3/10—Sintering only
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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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
- Materials For Medical Uses (AREA)
Abstract
The invention discloses a kind of sintering tools and method based on powder injection molding process manufacture slewing parts to be made part raw embryo for the base modules of raw material powder injection moulding slewing parts；Surrounding's Circle-Array by several horizontal restraint blocks around part raw embryo is arranged, wedge block height is adjusted by wedge block power mechanism upward stroke, it contacts horizontal restraint block with part raw embryo surface and keeps clamped condition, by pressure lever mechanism and post rod mechanism respectively from upper and lower sandwich part raw embryo, the sintering fixture comprising part raw embryo is formed；Sintering fixture comprising part raw embryo is placed in sintering burner hearth, pressure lever mechanism and post rod mechanism rotation are driven, drive part raw embryo rotates, heating, degreasing, and sintering obtains finished product.The present invention can provide the restraining force of surfaces externally and internally during the sintering process, and can carry out pressure adjustment according to sintering temperature and deformation, facilitate the geometric accuracy of control part, be heated full and uniform, realize that sintering is synchronous with shaping and carry out.
Description
Technical field
The invention belongs to powder injection molding technology fields, more particularly, to a kind of manufacturing process of slewing parts.
Background technique
Powder injection molding process is a kind of method using metal or ceramic powder end sintered part(s).Its process is mainly wrapped
It includes: metal or ceramic powder end and binder mixing, injection ejection formation, degreasing, sintering, post-processing (including machine, be electroplated
Or heat treatment etc.) etc..In general, the technique is suitable for, complex-shaped, generation quantity is larger and the part of small volume, can add
The part size of work is generally less than a table tennis size.Since using being injection moulded, the green density of generation is low, sintered
Finished product density is high, and the linear shrinkage ratio of sintered finished product is generally between 10-20%, for the part of big size, part ruler
Very little tolerance is excessive, simultaneously because the influence of gravity, inside parts can should be " lacking support " and generate sagging, leads to sintering warpage
Unevenly, finished appearance is extremely difficult to require, these all limit injection molding technique processing and manufacturing large scale slewing parts.
Summary of the invention
The object of the present invention is to provide a kind of sintering tools based on powder injection molding process manufacture slewing parts, can
To be suitable for manufacturing the slewing parts of larger geometric dimension, and the pressure to part surfaces externally and internally is conveniently kept in sintering engineering
Force constraint.
It is a further object of the present invention to provide it is excessively a kind of based on powder injection molding process manufacture slewing parts method,
The slewing parts for the sinter molding larger size that can be convenient, the part of processing the design function for having shape and structure it
Outside, the attribute of craftwork can also be had both.
The technical solution of the invention is as follows: a kind of agglomerant based on powder injection molding process manufacture slewing parts
Tool, the sintering furnace chamber including accommodating part raw embryo are equipped with several on part raw embryo periphery and are used for limit feature raw embryo water
The horizontal restraint block of translational shifting, several for clamp horizontal constraint block wedge block, be arranged in above the part raw embryo
Pressure lever mechanism and the post rod mechanism being arranged in below the part raw embryo, wherein wedge block is correspondingly arranged at horizontal restraint block
Bottom is equipped with the wedge block power mechanism that driving wedge block moves up and down in wedge block bottom, and pressure lever mechanism and post rod mechanism can
It moves up and down and rotates.
Part raw embryo level is clamped by horizontal restraint block, it will be in part raw embryo by pressure lever mechanism and post rod mechanism
Under clamp, by the height of stroke adjustment wedge block above and below wedge block power mechanism, to adjust the water to horizontal restraint block
Flat chucking power, and then support and clamping force to part raw embryo surface are kept, pressure lever mechanism and post rod mechanism are respectively from Vertical Square
Part raw embryo is clamped upwards, by adjusting the clamping force in pressure lever mechanism and the stroke adjustment vertical direction of post rod mechanism,
In this way, the horizontally and vertically clamped and support of entire part raw embryo, during the entire process of sintering effectively
Offer surfaces externally and internally pressure confines, the geometric accuracy of finished part can be accurately controlled, be suitble to manufacture compared with
Large-sized slewing parts.
The top of each wedge block is equipped with inclined-plane, and each horizontal restraint block is class inverted trapezoidal structure, inside
Face is the arcwall face matched with part raw embryo outer surface, and lateral surface is anti-equipped with cooperating with the wedge block top bevel
Inclined-plane.By the cooperation on inclined-plane and reverse slope, wedge block up and down motion is effectively converted into horizontal restraining force, arcwall face can
With the outer surface of effective mating parts raw embryo, lasting clamping force is provided, is also facilitated during the sintering process to part raw embryo appearance
Face carries out Shape correction.
Gap is equipped between the two neighboring horizontal restraint block.It can guarantee that clamped piece surface is heated sufficiently
It is even, and can be convenient and shaping is carried out to piece surface by constraint block during the sintering process.
Another technical solution of the invention is: a kind of to manufacture slewing parts based on powder injection molding process
Sintering method, comprising the following steps:
1., by raw material powder injection moulding slewing parts base modules, be made part raw embryo；
2., by several horizontal restraint blocks around part raw embryo surrounding's Circle-Array arrange, pass through wedge block power mechanism
Upward stroke adjusts wedge block height, so that horizontal restraint block is contacted and keep clamped condition with part raw embryo surface, by compression bar machine
Structure and post rod mechanism form the sintering fixture comprising part raw embryo respectively from upper and lower sandwich part raw embryo；
3., the sintering fixture comprising part raw embryo is placed in sintering burner hearth, drive pressure lever mechanism and post rod mechanism to turn
It is dynamic, the rotation of part raw embryo, heating are driven, degreasing is sintered, obtains finished product.
Part raw embryo can be used base modules made of injection molding technique and be spliced, and each intermodule can be sintered
Reliable and stable connection and color, the coordination transition in material are formed by the diffusion of powder in the process, promote part
The shape design and processes product attribute of product, slewing parts level is clamped, pass through pressure lever mechanism by horizontal restraint block
Slewing parts are clamped up and down with post rod mechanism, by the height of stroke adjustment wedge block above and below wedge block power mechanism,
To adjust the horizontal chucking power to horizontal restraint block, and then keep the support and clamping force to slewing parts surface, compression bar
Mechanism and post rod mechanism respectively clamp slewing parts from vertical direction, in this way, the level side of entire slewing parts
It is effectively clamped and is supported to vertical direction, rotational parts raw embryo can guarantee powder during the entire process of sintering
Thermally equivalent, but centrifugal force, gravity, the support force of fixture that part raw embryo can be made to be subject to are in a basic balance, guarantee the ruler of part
Very little and presentation quality, while horizontal restraint block can also carry out Shape correction by friction to part raw embryo surface, thus to zero
The geometric accuracy of part finished product is accurately controlled, and the slewing parts of manufacture larger size are suitble to.
Step 1. in, further include using the powder injection-molded decoration module of ornament materials, and by decoration module and matrix
The step of part raw embryo is made in block combiner.Unlike material, the powder injection-molded base modules of color and decoration can be used
Module can also further be had both the aesthetic feeling of craftwork by the parts product formed after sintering, increase the range of product design
And depth.
Step 3. in, further include during the sintering process by adjusting stroke adjustment wedge block above and below wedge block driving mechanism
To the clamping force of horizontal restraint block, and adjustment pressure lever mechanism and post rod mechanism revolving speed the step of.According to material property and burning
Junction temperature variation, adjusts clamping force and revolving speed, thereby further ensures that the centrifugal force being subject in powder sintered forming process, gravity
With support dynamic balance, the yields of part manufacturing is improved.
The invention has the advantages that the restraining force of surfaces externally and internally can be provided in slewing parts sintering process, and can be with
Pressure adjustment is carried out according to sintering temperature and deformation, facilitates the geometric accuracy of control part, is heated full and uniform, realizes and burns
Tie carry out synchronous with shaping.
Detailed description of the invention
Attached drawing 1 is the composed structure schematic diagram of part raw embryo in the embodiment of the present invention；
Attached drawing 2 is the structural schematic diagram that tool is sintered in the embodiment of the present invention；
Attached drawing 3 is sectional view along A-A in Fig. 2；
1, base modules, 2, decoration module, 3, decoration module, 4, sintering furnace chamber, 5, heater, 6, vacuumize and fill protection gas
Device, 7, part raw embryo, 8, horizontal restraint block, 9, arcwall face, 10, reverse slope, 11, wedge block, 12, inclined-plane, 13, wedge block it is dynamic
Force mechanisms, 14, pressure lever mechanism, 15, post rod mechanism, 16, gap.
Specific embodiment
Embodiment:
Refering to fig. 1-3, a kind of sintering tool based on powder injection molding process manufacture slewing parts, including accommodating zero
The sintering furnace chamber 4 of part raw embryo 7 is symmetrically arranged with four levels for 7 horizontal shift of limit feature raw embryo on 7 periphery of part raw embryo
Constraint block 8, four for clamp horizontal constraint block 8 wedge block 11, be arranged in the top of part raw embryo 7 pressure lever mechanism 14 and
Post rod mechanism 15 below part raw embryo 7 is set, and wherein wedge block 11 is correspondingly arranged at the bottom of horizontal restraint block 8, in wedge
8 bottom of shape block is equipped with the wedge block power mechanism 13 that driving wedge block 11 moves up and down, and pressure lever mechanism 14 and post rod mechanism 15 can
It moves up and down and rotates.The top of each wedge block 11 is equipped with inclined-plane 12, and each horizontal restraint block 8 is class inverted trapezoidal structure,
Medial surface is the arcwall face 9 matched with 7 outer surface of part raw embryo, and lateral surface is equipped with to be cooperated with 11 top bevel 12 of wedge block
Reverse slope 10.Gap 16 is equipped between two neighboring horizontal restraint block 8.
A kind of sintering method based on powder injection molding process manufacture slewing parts, comprising the following steps:
1., different raw material powders is injection moulded to the base modules 1 and decoration module 2 and decoration of slewing parts respectively
Module 3, wherein decoration module 2 is located at 1 inner surface of base modules, and decoration module 3 is located at 1 outer surface of base modules, the present embodiment
In, 1 material of base modules is Stainless steel 316 L, and the material of decoration module 2 and 3 is zirconium oxide, can pass through addition colorant, sintering
Auxiliary agent generates different colors.After base modules 1 and decoration module 2 and 3 are injection moulded respectively, pass through interference fit splicing system
Obtain part raw embryo；It can also be disposably injection moulded by polychrome multi-component Injection Molding mold and part raw embryo 7 is made.
2., by four horizontal restraint blocks 8 around part raw embryo 7 surrounding's Circle-Array arrange, two neighboring horizontal restraint block 8
Between be equipped with gap 16, the height of wedge block 11 is adjusted by 13 upward stroke of wedge block power mechanism, makes the arc of horizontal restraint block 8
Shape face 9 and 7 appearance face contact of part raw embryo simultaneously keep clamped condition, by pressure lever mechanism 14 and post rod mechanism 15 respectively from upper and lower two
Side holding parts raw embryo 7 forms the sintering fixture comprising part raw embryo 7；
3., the sintering fixture comprising part raw embryo 7 is placed in sintering burner hearth 4, drive 14 structure of compression bar and mandril machine
Structure 15 rotates, and part raw embryo 7 is driven to rotate, and starting heater 5 heats up, and starting, which vacuumizes, fills protection 6 pairs of sintering burner hearths 4 of device of air
Protection gas is inside filled, is completed according to the temperature curve of setting, degreasing and sintering process obtain finished product.Stainless steel in the present embodiment
The sintering temperature of 316L and zirconium oxide can be set as 1400 DEG C or so, and the matrix and decoration module after the completion of being sintered form stabilization
Reliable connection, decoration module can design the pattern in complex-shaped beauty, use so that attractive and durable high-end kitchen tools be made
Product.
The movement in the horizontal direction of 8 limit feature raw embryo of horizontal restraint block 7, wedge block 11 and wedge block power mechanism 13 are then
Horizontal applied force and control amount of movement are provided for horizontal restraint block 8, it is therefore an objective to branch is persistently provided during part sintering shrinkage
Support, prevents the sagging deflections of part wall.Pressure lever mechanism 14 and post rod mechanism 15 drive from vertical direction Clamp blocks raw embryo 7
Part raw embryo 7 rotates, to make part during the sintering process, the clamping force of centrifugal force, gravity and fixture that powder is subject to is kept
Balance.There is gap between two neighboring horizontal restraint block 8, can guarantee being heated evenly when rotated of part raw embryo 7 in this way,
Shape correction can be carried out to 7 outer surface of part raw embryo by contact friction using the arcwall face 9 on 8 surface of horizontal restraint block again, it is special
Be not can to unlike material intermodule deformation defect as caused by shrinking percentage difference carry out Shape correction, realize sintering and it is whole
The synchronization of shape.
During the sintering process, about 13 stroke adjustment wedge block 11 of wedge block driving mechanism can also be adjusted to horizontal restraint
The clamping force of block 8, and the revolving speed change centrifugal force size of adjustment pressure lever mechanism 14 and post rod mechanism 15, wherein in degreasing
Cheng Zhong, temperature is relatively low, and the intensity of part is weaker, and the clamping force of fixture can be turned down suitably, and rotation speed is relatively low, works as burning
During knot, as the temperature rises, the intensity of part increases, and sintering warpage increases, and can correspondingly increase the folder of fixture at this time
Clamp force and increase rotary rpm.
Above-listed detailed description is illustrating for one of present invention possible embodiments, and the embodiment is not to limit
The scope of the patents of the invention, all equivalence enforcements or change without departing from carried out by the present invention, is intended to be limited solely by the scope of the patents of this case
In.
Claims (6)
1. a kind of sintering tool based on powder injection molding process manufacture slewing parts, the sintering including accommodating part raw embryo
Furnace chamber, it is characterised in that: be used for the level of limit feature raw embryo horizontal shift about equipped with several on part raw embryo periphery
Beam block, several for the wedge block of clamp horizontal constraint block, the pressure lever mechanism that is arranged in above the part raw embryo and set
The post rod mechanism below the part raw embryo is set, wherein wedge block is correspondingly arranged at the bottom of horizontal restraint block, in wedge block
Bottom is equipped with the wedge block power mechanism that driving wedge block moves up and down, and pressure lever mechanism and post rod mechanism can move up and down and turn
It is dynamic.
2. the sintering tool according to claim 1 based on powder injection molding process manufacture slewing parts, feature
Be: the top of each wedge block is equipped with inclined-plane, and each horizontal restraint block is class inverted trapezoidal structure, and medial surface is
The arcwall face matched with part raw embryo outer surface, lateral surface are equipped with the backslash cooperated with the wedge block top bevel
Face.
3. the sintering tool according to claim 2 based on powder injection molding process manufacture slewing parts, feature
It is: is equipped with gap between the two neighboring horizontal restraint block.
4. a kind of sintering tool using as described in claim 1 based on powder injection molding process manufacture slewing parts
Sintering method, it is characterised in that: include the following steps,
1., by raw material powder injection moulding slewing parts base modules, be made part raw embryo；
2., by several horizontal restraint blocks around part raw embryo surrounding's Circle-Array arrange, it is upward by wedge block power mechanism
Traffic control system wedge block height makes horizontal restraint block contact and keep clamped condition with part raw embryo surface, by pressure lever mechanism and
Post rod mechanism from upper and lower sandwich part raw embryo, forms the sintering fixture comprising part raw embryo respectively；
3., by the sintering fixture comprising part raw embryo be placed on sintering burner hearth in, drive pressure lever mechanism and post rod mechanism rotation, band
Dynamic part raw embryo rotation, heating, degreasing, sintering obtain finished product.
5. the sintering method according to claim 4 based on powder injection molding process manufacture slewing parts, feature
Be: step 1. in, further include using the powder injection-molded decoration module of ornament materials, and by decoration module and base modules
Combine the step of part raw embryo is made.
6. the sintering method according to claim 5 based on powder injection molding process manufacture slewing parts, feature
Be: step 3. in, further include during the sintering process by adjusting stroke adjustment wedge block pair above and below wedge block driving mechanism
The clamping force of horizontal restraint block, and adjustment pressure lever mechanism and post rod mechanism revolving speed the step of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811565868.0A CN109465444B (en) | 2018-12-20 | 2018-12-20 | Sintering tool and method for manufacturing rotary parts based on powder injection molding process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811565868.0A CN109465444B (en) | 2018-12-20 | 2018-12-20 | Sintering tool and method for manufacturing rotary parts based on powder injection molding process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109465444A true CN109465444A (en) | 2019-03-15 |
| CN109465444B CN109465444B (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811565868.0A Expired - Fee Related CN109465444B (en) | 2018-12-20 | 2018-12-20 | Sintering tool and method for manufacturing rotary parts based on powder injection molding process |
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| CN203292486U (en) * | 2013-05-04 | 2013-11-20 | 天长市昭田磁电科技有限公司 | Bearing clamp convenient to position magnetic core during sintering of circular magnetic core |
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| CN108290217A (en) * | 2015-09-18 | 2018-07-17 | 吉凯恩粉末冶金工程有限公司 | Sintering press with axially controlled deformation and correlation method |
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2018
- 2018-12-20 CN CN201811565868.0A patent/CN109465444B/en not_active Expired - Fee Related
Patent Citations (6)
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|---|---|---|---|---|
| CN103084998A (en) * | 2011-10-31 | 2013-05-08 | 郁祥林 | Fixture |
| CN203292486U (en) * | 2013-05-04 | 2013-11-20 | 天长市昭田磁电科技有限公司 | Bearing clamp convenient to position magnetic core during sintering of circular magnetic core |
| JP2016144829A (en) * | 2015-01-29 | 2016-08-12 | 京セラ株式会社 | End tab for welding |
| CN108290217A (en) * | 2015-09-18 | 2018-07-17 | 吉凯恩粉末冶金工程有限公司 | Sintering press with axially controlled deformation and correlation method |
| CN106624850A (en) * | 2015-10-29 | 2017-05-10 | 芜湖中驰机床制造有限公司 | Clamp device for machining thin-wall rotational body part |
| CN206989690U (en) * | 2017-07-17 | 2018-02-09 | 鄂州市金锋超硬材料有限公司 | The bell jar type sintering furnace thorax fixture of small size diamond saw blade |
Non-Patent Citations (1)
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| 王康、刘红武、岳昊: "基于Moldex3D的MIM注射仿真", 《智能制造》 * |
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| CN109465444B (en) | 2021-02-26 |
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Granted publication date: 20210226 Termination date: 20211220 |