CN109352374A - A kind of SiC reflecting mirror pre-made powder green body mitigates the clamping tooling and processing method of slot - Google Patents
A kind of SiC reflecting mirror pre-made powder green body mitigates the clamping tooling and processing method of slot Download PDFInfo
- Publication number
- CN109352374A CN109352374A CN201811372857.0A CN201811372857A CN109352374A CN 109352374 A CN109352374 A CN 109352374A CN 201811372857 A CN201811372857 A CN 201811372857A CN 109352374 A CN109352374 A CN 109352374A
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- CN
- China
- Prior art keywords
- green body
- sic
- tooling
- slot
- reflecting mirror
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- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention relates to clamping toolings and processing method that a kind of SiC reflecting mirror pre-made powder green body mitigates slot, undertake a part of Milling Force by designing clamping tooling, reduce the stress of cavity wall, avoid cavity wall fragmentation, chipping problem due to stress is excessive；Milling Force is reduced using PCD diamond milling cutter, avoids powder green bodies stress excessive and is peeled off in blocky；Without using cutting fluid, avoiding the intracorporal organic binder of cutting fluid dissolved powders base from making, SiC powder is peeled off out of green body or green body collapsing, cutting fluid impact force cross ambassador's thin-walled chipping；Realize that SiC reflecting mirror powder green bodies mitigate the Milling Process of slot using optimization milling process parameter etc..
Description
Technical field
The invention belongs to new material field of machining, it is related to a kind of SiC reflecting mirror pre-made powder green body and mitigates slot
Clamping tooling and processing method.
Background technique
It is advanced composite material (ACM) that SiC powder, which enhances Metal Substrate, Si base, have high specific strength, high elastic modulus, high temperature resistant,
Wear-resistant, the advantages that thermal expansion coefficient is small, diamagnetic shock resistance is good, good stability of the dimension, in the application prospect of aerospace field
It is very wide.However since metal, Si matrix and the completely different Physical and mechanical properties of SiC particulate reinforcement cause SiCp/
Al, SiC-Si composite material become typical difficult-to-machine material.Especially for the mitigation slot of reflecting mirror, with common method for milling
Milling Force is larger when directly processing, and tool wear is serious, and cavity wall is born biggish Milling Force and easily collapsed, and processing cavity is imperfect.
And the common preparation method of composite material is to mix SiC powder with organic binder to be pressed into preform first at present, so
Further metallic cementation and Si matrix in vacuum drying oven afterwards, and SiC powder preform blank is to prepare SiC particle-reinforced Al matrix to answer
The basis of condensation material (SiCp/Al), SiC-Si composite material, if infiltration Si, Al element post-processing, it is big that there are difficulty of processing,
The problem of tool wear is serious, cannot be processed type；If machine-shaping before infiltrating, not only significantly less subsequent machine addition sheet,
Passing rate of processing can also be improved.
Milling Force is reduced with PCD milling cutter, avoids billet surface SiC powder from falling off and is peeled off with blocky；Without using cutting fluid, keep away
The without cutting liquid dissolution intracorporal organic binder of pre-made powder base makes SiC powder collapse from billet surface peeling or green body, avoids
Cutting fluid impact force crosses ambassador's cavity wall chipping.
Summary of the invention
Technical problems to be solved
In order to avoid the shortcomings of the prior art, the present invention proposes that a kind of SiC reflecting mirror pre-made powder green body mitigates slot
Clamping tooling and processing method, be to carry a part of milling by design clamping tooling to cut power, reduce the stress of cavity wall, avoid
The problem of being more than the bearing strength of cavity wall due to stress is excessive at most slim cavity wall and fragmentation, chipping.
Technical solution
A kind of SiC reflecting mirror pre-made powder green body mitigates the clamping tooling of slot, it is characterised in that including two sections of cylindrical holes, hole
Wall is equipped with through slot 1；The interior hole end surface of first cylindrical hole 2 is higher than the height for being processed SiC reflecting mirror pre-made powder green body, interior
Diameter, which is greater than, is processed SiC reflecting mirror pre-made powder green body outer diameter；The internal diameter and outer diameter of second cylindrical hole 3 are less than the first cylindrical hole 2
Internal diameter.
The width of the through slot 1 is 4mm.
A method of slot, feature are mitigated using the clamping tooling Milling Process SiC reflecting mirror pre-made powder green body
It is that steps are as follows:
Step 1: according to the SiC reflecting mirror pre-made powder green body size processed, processing clamping tooling；Second cylindrical hole 1
It is placed in vice；
Step 2: cylindrical prefabricated SiC powder blank is installed at the inner hole of the first cylindrical hole of tooling upper end 2, outer wall with
The contact of tooling inner hole, lower end are contacted with tooling upper end hole bottom, and adjustment preform is allowed to contact uniformly with tooling；
Step 3: vice clamping tooling lower end makes tooling upper end inner hole surface and cylindrical prefabricated SiC powder blank outer surface shape
At tight fit, tooling inner hole wall is higher than part blank and avoids the end face chipping of blank outer wall；
Step 4: according to the art work sheet of SiC powder blank, carrying out the processing for mitigating slot；
Step 5: the pre-made powder green body processed being unloaded from machining center vice together with tooling, uses cylindrical bar
Material insertion tooling lower end ejects the pre-made powder green body processed, cleans the SiC powder deposited on green body, completes entire processing
Process.
Beneficial effect
A kind of SiC reflecting mirror pre-made powder green body proposed by the present invention mitigates the clamping tooling and processing method of slot, passes through
Design clamping tooling undertakes a part of Milling Force, reduces the stress of cavity wall, cavity wall fragmentation, chipping due to stress is excessive is avoided to ask
Topic；Milling Force is reduced using PCD diamond milling cutter, avoids powder green bodies stress excessive and is peeled off in blocky；Without using cutting fluid,
Avoiding the intracorporal organic binder of cutting fluid dissolved powders base from making, SiC powder is peeled off out of green body or green body collapsing, cutting fluid are rushed
It hits power and crosses ambassador's thin-walled chipping；Realize that the milling of SiC reflecting mirror powder green bodies mitigation slot adds using optimization milling process parameter etc.
Work.
The beneficial effects of the invention are as follows solve the cylindrical prefabricated SiC powder base of the clamping directly on vice or scroll chuck
Material, makes blank total collapse, cracks and fragmentation eventually leads to the problem of processing fails；It solves prefabricated in process
The cavity wall chipping of SiC powder blank end face or surface lead to the problem of blocky peeling；Solves prefabricated SiC powder blank type when milling
Cavity wall cracks due to excessive by torque or the phenomenon that chipping；It solves prefabricated SiC powder blank to be impacted and collapsed by cutting fluid
Side, blocky the problem of peeling off；Cutting fluid is avoided to dissolve the organic solvent in prefabricated SiC powder blank and collapse and generate with surface
The problem of etch pit.The present invention is suitable for the Milling Process that all low adhesion strength powder preforms mitigate slot.
Detailed description of the invention
Fig. 1 is that prefabricated SiC powder blank of the invention mitigates groove shape schematic diagram；
Fig. 2 is tooling schematic shapes of the invention；
Fig. 3 is prefabricated SiC powder blank and tooling assembling schematic diagram of the invention.
Specific embodiment
Now in conjunction with embodiment, attached drawing, the invention will be further described:
The cylindrical powder preform blank of embodiment is using hot isostatic pressing method by SiC powder and a certain proportion of organic
Binder mixtures are placed compacting, binder in cylindrical die and are solidified.
Prefabricated SiC powder blank mitigates slot processing:
The first step, design elements clamping tooling, including two sections of cylindrical holes, hole wall are equipped with through slot 1；First cylindrical hole 2
Interior hole end surface be higher than be processed SiC reflecting mirror pre-made powder green body height, internal diameter be greater than be processed the prefabricated powder of SiC reflecting mirror
Last green body outer diameter；Internal diameter of the internal diameter and outer diameter of second cylindrical hole 3 less than the first cylindrical hole 2；Tooling hole wall contains logical after 4mm
Slot；
Cylinder blank is installed at the inner hole of tooling upper end by second step, and outer wall is contacted with tooling inner hole, tooling inner hole wall
The end face chipping of blank outer wall is avoided higher than pre-made powder blank；Lower end is contacted with tooling upper end hole bottom, and adjustment blank is allowed to and work
Attaching touching is uniform；
Clamping tooling is mounted in the vice or scroll chuck on numer centre platform by third step, adjusts vice or three
Dog chuck forms tooling upper end inner hole wall and cylinder blank and is fitted close；
4th step carries out the processing for mitigating slot according to the art work sheet of SiC powder blank in corresponding equipment；
5th step unloads the pre-made powder green body processed, with cylinder together with tooling from machining center vice
Bar insertion tooling lower end ejects the pre-made powder green body processed, cleans the SiC powder deposited on green body, completes entire add
Work process.
Claims (3)
1. the clamping tooling that a kind of SiC reflecting mirror pre-made powder green body mitigates slot, it is characterised in that including two sections of cylindrical holes, hole wall
Equipped with through slot (1)；The interior hole end surface of first cylindrical hole (2) is higher than the height for being processed SiC reflecting mirror pre-made powder green body,
Internal diameter, which is greater than, is processed SiC reflecting mirror pre-made powder green body outer diameter；The internal diameter and outer diameter of second cylindrical hole (3) are less than the first cylinder
The internal diameter in hole (2).
2. SiC reflecting mirror pre-made powder green body mitigates the clamping tooling of slot according to claim 1, it is characterised in that: described
The width of through slot (1) is 4mm.
3. a kind of side for mitigating slot using clamping tooling Milling Process SiC reflecting mirror pre-made powder green body as claimed in claim 1 or 2
Method, it is characterised in that steps are as follows:
Step 1: according to the SiC reflecting mirror pre-made powder green body size processed, processing clamping tooling；Second cylindrical hole 1 is placed in
Vice；
Step 2: cylindrical prefabricated SiC powder blank being installed at the inner hole of the first cylindrical hole of tooling upper end (2), outer wall and work
Inner hole contact is filled, lower end is contacted with tooling upper end hole bottom, and adjustment preform is allowed to contact uniformly with tooling；
Step 3: vice clamping tooling lower end forms tooling upper end inner hole surface and cylindrical prefabricated SiC powder blank outer surface tightly
Close fit, tooling inner hole wall are higher than part blank and avoid the end face chipping of blank outer wall；
Step 4: according to the art work sheet of SiC powder blank, carrying out the processing for mitigating slot；
Step 5: the pre-made powder green body processed being unloaded from machining center vice together with tooling, is inserted with cylindrical bar
Enter tooling lower end to eject the pre-made powder green body processed, cleans the SiC powder deposited on green body, complete entire processing stream
Journey.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811372857.0A CN109352374A (en) | 2018-11-19 | 2018-11-19 | A kind of SiC reflecting mirror pre-made powder green body mitigates the clamping tooling and processing method of slot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811372857.0A CN109352374A (en) | 2018-11-19 | 2018-11-19 | A kind of SiC reflecting mirror pre-made powder green body mitigates the clamping tooling and processing method of slot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109352374A true CN109352374A (en) | 2019-02-19 |
Family
ID=65332175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811372857.0A Pending CN109352374A (en) | 2018-11-19 | 2018-11-19 | A kind of SiC reflecting mirror pre-made powder green body mitigates the clamping tooling and processing method of slot |
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| Country | Link |
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| CN (1) | CN109352374A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101240417A (en) * | 2007-02-05 | 2008-08-13 | 中南大学 | Method for preparing silicon carbide reflecting mirror material and CVI forming device thereof |
| CN202428208U (en) * | 2011-12-29 | 2012-09-12 | 安瑞科(蚌埠)压缩机有限公司 | Elastic sleeve for processing end face of thread protective sleeve of piston rod |
| CN203141170U (en) * | 2013-03-28 | 2013-08-21 | 莱芜钢铁集团有限公司 | Tool for machining thin-wall check ring |
| CN204019153U (en) * | 2014-05-21 | 2014-12-17 | 北京新立机械有限责任公司 | A kind of processing tool of ring-shaped thin-walled part endoporus |
| CN204997395U (en) * | 2015-10-08 | 2016-01-27 | 深圳奥维德机电有限公司 | Elasticity clamping device of finish machining aluminium matter disc class communication work piece |
| KR20160107440A (en) * | 2015-03-04 | 2016-09-19 | 주식회사 유도 | Collet Chuck Having Fixing Jig |
-
2018
- 2018-11-19 CN CN201811372857.0A patent/CN109352374A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101240417A (en) * | 2007-02-05 | 2008-08-13 | 中南大学 | Method for preparing silicon carbide reflecting mirror material and CVI forming device thereof |
| CN202428208U (en) * | 2011-12-29 | 2012-09-12 | 安瑞科(蚌埠)压缩机有限公司 | Elastic sleeve for processing end face of thread protective sleeve of piston rod |
| CN203141170U (en) * | 2013-03-28 | 2013-08-21 | 莱芜钢铁集团有限公司 | Tool for machining thin-wall check ring |
| CN204019153U (en) * | 2014-05-21 | 2014-12-17 | 北京新立机械有限责任公司 | A kind of processing tool of ring-shaped thin-walled part endoporus |
| KR20160107440A (en) * | 2015-03-04 | 2016-09-19 | 주식회사 유도 | Collet Chuck Having Fixing Jig |
| CN204997395U (en) * | 2015-10-08 | 2016-01-27 | 深圳奥维德机电有限公司 | Elasticity clamping device of finish machining aluminium matter disc class communication work piece |
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Application publication date: 20190219 |