CN103801676B - C fthe liquid-solid pressure former of/Mg composite material thin wall profiled piece and method - Google Patents
C fthe liquid-solid pressure former of/Mg composite material thin wall profiled piece and method Download PDFInfo
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- CN103801676B CN103801676B CN201310713312.2A CN201310713312A CN103801676B CN 103801676 B CN103801676 B CN 103801676B CN 201310713312 A CN201310713312 A CN 201310713312A CN 103801676 B CN103801676 B CN 103801676B
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Abstract
The invention discloses a kind of C
fthe liquid-solid pressure former of/Mg composite material thin wall profiled piece and method, be difficult to the technical problem of the baroque precast body of shaped inner for solving existing composite building block of fiber enhanced intermetallic compound preparation facilities.Technical scheme adopts Split type insert structure to replace monoblock type core to shape to precast body, and compare monoblock type core, be hollow structure inside insert group, Male Die Size is little, can reduce the overall weight of building mortion; Utilize stressed the produced radial motion of insert, impel liquid magnesium alloy evenly to infiltrate in precast body; Insert surface fits tightly with precast body inwall, and fixed effect is remarkable, by changing the cross sectional shape of insert, can realize difform C
fthe near-net-shape of/Mg composite material thin wall profiled piece; Extrude rear separation insert and realized the demoulding, effectively avoided the precast body of interior wall construction complexity to shape the technical problems such as the large and difficult demoulding of difficulty, achieve the shaping of composite material thin wall profiled piece.
Description
Technical field
The present invention relates to a kind of C
f/ Mg composite material thin wall profiled piece building mortion, particularly a kind of C
fthe liquid-solid pressure former of/Mg composite material thin wall profiled piece.Also relate to the C adopting this device
fthe liquid-solid press forming method of/Mg composite material thin wall profiled piece.
Background technology
C
f/ Mg composite has that density is low (is less than 2.0g/cm
3), the advantage such as specific strength is high, specific stiffness is high, thermal coefficient of expansion is low, good stability of the dimension, be widely used in the manufacture of thin-wall special-shaped of engine piston ring, aircraft cylindrical stent part, gear-box case, aviation turbofan engine casing etc.Two kinds of modes are taked in the shaping of current composite material thin wall profiled piece substantially: one is point body formed, be shaped each position successively, then technique connects into entirety to adopt riveted joint, be spirally connected etc., which significantly can reduce the shaping difficulty of composite element, but the hole of connecting portion can destroy fiber continuity, cause structural damage to destroy, affect its performance.Another kind is global formation, and the composite element prepared of this technology can even transmitted load, and load-carrying efficiency is high, but when profile is complicated, shaping difficulty is large, has become the key factor of this technology of restriction application.
With reference to Fig. 6.Document " patent publication No. is the Chinese invention patent of CN101003885A " discloses a kind of composite building block of fiber enhanced intermetallic compound preparation facilities and preparation method thereof.Preparation facilities comprises core 1, external mold 2, mould 4, top board 6, lower platen 7 and pressure head 8 six part.Pre-soaking fiber is wrapped on core 1, and after being wound into part thickness, install external mold 2, entirety puts into die cavity.Apply pressure by pressure head 8, make aluminium alloy be infiltrated up to the fibrous inside of precast body.The monoblock type core that this device adopts can not effectively be shaped to the precast body of interior wall construction complexity, easily causes precast body to be out of shape in infiltration by squeeze casting process.
Summary of the invention
Being difficult to the deficiency of the baroque precast body of shaping inner wall in order to overcome existing composite building block of fiber enhanced intermetallic compound preparation facilities, the invention provides a kind of C
fthe liquid-solid pressure former of/Mg composite material thin wall profiled piece.This device adopts Split type insert structure to replace monoblock type core to shape to precast body, compares monoblock type core, be hollow structure, and Male Die Size is less, can reduces the overall weight of building mortion inside insert group; Utilize stressed the produced radial motion of insert, impel liquid magnesium alloy evenly to infiltrate in precast body; Insert surface fits tightly with precast body inwall, and fixed effect is remarkable, by changing the cross sectional shape of insert, can realize difform C
fthe near-net-shape of/Mg composite material thin wall profiled piece; Extruded rear separation insert and realized the demoulding, effectively avoided the precast body of interior wall construction complexity sizing difficulty large, compressive deformation, profiled piece cannot the technical problem such as the demoulding, realizes the shaping of composite material thin wall profiled piece.
The present invention also provides the C adopting this device
fthe liquid-solid press forming method of/Mg composite material thin wall profiled piece.
The technical solution adopted for the present invention to solve the technical problems: a kind of C
fthe liquid-solid pressure former of/Mg composite material thin wall profiled piece, is characterized in: comprise interior cushion block 1, recipient 2, graphite mo(u)ld 3, insert group 4, retainer ring 5, punch 6, vacuum tube 8 and compo pipe 9; Described recipient 2 is arranged on compressor operation platform, and recipient 2 is respectively arranged with vacuum hole and alloy hole near the both sides on upper edge, and vacuum hole and alloy hole are threaded with vacuum tube 8 and compo pipe 9 self sealss respectively; Interior cushion block 1 is positioned at bottom recipient 2, and embed recipient 2 completely, closely cooperate with recipient 2 inwall, interior cushion block 1 pair of graphite mo(u)ld 3, insert group 4 and precast body 7 play a supportive role, the upper surface of interior cushion block 1 has eight locating dowels, corresponds respectively to eight locator slides of insert group 4 bottom surface, in order to ensure the track in insert group 4 motion process, and with the concentricity of recipient 2 inwall, locator slide coordinates with locating dowel closely; It is inner that graphite mo(u)ld 3 is arranged on recipient 2; Insert group 4 is made up of eight parts, is respectively four and supports insert, four extruding inserts, eight locator slides of corresponding insert group 4 bottom surface, and each insert upper is processed with groove, is convenient to the tool holding demoulding; Supporting inside insert is a conical surface, and inside four support inserts, cone match forms imperfect cone, coordinates and form cylindrical shell outside eight inserts; Insert group 4 is arranged on recipient 2 inner chamber, and ensure the locator slide of insert group 4 bottom side and coordinating between the locating dowel on the upside of interior cushion block 1, adjacent insert contact area in the process of radially moving reduces gradually, but still remains closed; Retainer ring 5 is bolted to the top of recipient 2; Punch 6 is cone structure, in order to ensure in extrusion process with support fully contacting of the conical surface inside insert, the center line of punch 6 and four-column hydraulic press slide block plane orthogonal during installation.
A kind of C adopting said apparatus
fthe liquid-solid press forming method of/Mg composite material thin wall profiled piece, is characterized in comprising the following steps:
Step one: continuous fiber is made cylindrical member and carries out the stitching of thickness direction; The fiber preform made is placed in chemical vapor deposition stove and carries out chemical vapour deposition (CVD), solidification precast body at surface deposition pyrocarbon coating;
Step 2: be fixed on four-column hydraulic press slide block by punch 6, ensures its center line and slide block plane orthogonal; Interior cushion block 1 is embedded recipient 2 completely, closely cooperates with recipient 2 inwall; According to precast body 7 outer wall dimension, the graphite mo(u)ld 3 processed is arranged on interior cushion block 1 upper surface; Precast body 7 puts into recipient 2, fits with inside graphite mo(u)ld 3; Insert group 4 loads in recipient 2 process, and eight locator slides of its bottom surface and eight locating dowels on interior cushion block 1 top closely cooperate, to ensure the track in insert group 4 motion process, and with the concentricity of recipient 2 inwall; Retainer ring 5 is bolted to recipient 2 top; After correcting the concentricity of recipient 2 inwall and punch 6, recipient 2 is closely fixed on compressor operation platform; Mounting vacuum tube 8 and compo pipe 9 respectively;
Step 3: utilize vavuum pump to vacuumize shaping die cavity, vacuum is 10
-3~ 10
-2pa; Matrix alloy be heated to 760 DEG C and be incubated 0.5 ~ 1h, mold heated to 575 ~ 650 DEG C; In alloy melting device, pass into argon gas, device internal pressure reaches 0.1 ~ 0.3MPa, is pressed into by aluminium alloy in the confined space formed by interior cushion block 1, recipient 2, graphite mo(u)ld 3, insert group 4, retainer ring 5, vacuum tube 8 and compo pipe 9; Close vacuum tube 8 and compo pipe 9, start four-column hydraulic press, slide block drives punch 6 vertically descending with the speed of 0.2 ~ 0.5mm/s, by punch 6, insert group 4 mechanism, the axial force along punch 6 direction is converted into radial load, in the process of radially moving, adjacent insert contact area reduces gradually, but still remains closed; Now, exert pressure 20 ~ 50MPa on extruding insert alloy liquid surface, aluminium alloy is pressurize 20 ~ 80min in the airtight cylindrical spaces formed by interior cushion block 1, recipient 2, graphite mo(u)ld 3, insert group 4, retainer ring 5, vacuum tube 8 and compo pipe 9, liquid magnesium alloy has infiltrated in continuous fiber tubular precast body, obtains C
f/ Mg composite material thin wall profiled piece; Treat that infiltration process thoroughly completes, exit punch 6;
Step 4: after having extruded, treats that fibrous composite is cooled to room temperature, removes retainer ring 5; To be stood upside down by recipient 2 placement, be heated to 400 DEG C, cylindrical shell expands, and sticking to mould resistance reduces; Starting four-column hydraulic press makes slide block drive punch 6 descending, until eject graphite mo(u)ld 3, insert group 4 and composite; Fix graphite mo(u)ld 3 from outside, tool holding insert is inwardly shunk simultaneously, completes C
fthe demoulding of/Mg composite material thin wall profiled piece;
Step 5: after cylindrical member cooling, adopts machining to be shaped the cylindrical member of needs, then heat-treats and finished machined.
The invention has the beneficial effects as follows: this device adopts Split type insert structure to replace monoblock type core to shape to precast body, compares monoblock type core, be hollow structure, and Male Die Size is less, can reduces the overall weight of building mortion inside insert group; Utilize stressed the produced radial motion of insert, impel liquid magnesium alloy evenly to infiltrate in precast body; Insert surface fits tightly with precast body inwall, and fixed effect is remarkable, by changing the cross sectional shape of insert, can realize difform C
fthe near-net-shape of/Mg composite material thin wall profiled piece; Extruded rear separation insert and realized the demoulding, effectively avoided the precast body of interior wall construction complexity sizing difficulty large, compressive deformation, profiled piece cannot the technical problem such as the demoulding, realizes the shaping of composite material thin wall profiled piece.
Below in conjunction with the drawings and specific embodiments, the present invention is elaborated.
Accompanying drawing explanation
Fig. 1 is C of the present invention
fthe structural representation of the liquid-solid pressure former of/Mg composite material thin wall profiled piece.
Fig. 2 is insert group radial motion (before the motion) schematic diagram in Fig. 1.
Fig. 3 is insert group radial motion (after the motion) schematic diagram in Fig. 1.
Fig. 4 is the schematic diagram of the punch in Fig. 1.
Fig. 5 is the C of the inventive method embodiment 2 with interior outward flange
fthe insert group schematic diagram of/Mg composite material thin wall profiled piece.
In figure, cushion block in 1-, 2-recipient, 3-graphite mo(u)ld, 4-insert group, 5-retainer ring, 6-punch, 7-precast body, 8-vacuum tube, 9-compo pipe.
Fig. 6 is the structural representation of background technology composite building block of fiber enhanced intermetallic compound preparation facilities.
In figure, 1-core, 2-external mold, 4-mould, 6-top board, 7-lower platen, 8-pressure head.
Detailed description of the invention
Following examples are with reference to Fig. 1-5.
Device embodiment: C of the present invention
fthe liquid-solid pressure former of/Mg composite material thin wall profiled piece, comprises interior cushion block 1, recipient 2, graphite mo(u)ld 3, insert group 4, retainer ring 5, punch 6, vacuum tube 8 and compo pipe 9.Described recipient 2 is arranged on compressor operation platform, and recipient 2 is respectively arranged with vacuum hole and alloy hole near the both sides on upper edge, and vacuum hole and alloy hole are threaded with vacuum tube 8 and compo pipe 9 self sealss respectively; Interior cushion block 1 is positioned at bottom recipient 2, and embed recipient 2 completely, closely cooperate with recipient 2 inwall, interior cushion block 1 pair of graphite mo(u)ld 3, insert group 4 and precast body 7 play a supportive role, the upper surface of interior cushion block 1 has eight locating dowels, corresponds respectively to eight locator slides of insert group 4 bottom surface, in order to ensure the track in insert group 4 motion process, and with the concentricity of recipient 2 inwall, locator slide coordinates with locating dowel closely; It is inner that graphite mo(u)ld 3 is arranged on recipient 2; Insert group 4 is made up of eight parts, is respectively four and supports insert, and four extruding inserts, eight locator slides of corresponding insert group 4 bottom surface, each insert upper is processed with groove, is convenient to the tool holding demoulding.Supporting inside insert is a conical surface, and inside four support inserts, cone match forms imperfect cone, coordinates and form cylindrical shell outside eight inserts; Insert group 4 is arranged on recipient 2 inner chamber, and ensure the locator slide of insert group 4 bottom side and coordinating between the locating dowel on the upside of interior cushion block 1, adjacent insert contact area in the process of radially moving reduces gradually, but still remains closed; Retainer ring 5 is bolted to the top of recipient 2; Punch 6 is cone structure, in order to ensure in extrusion process with support fully contacting of the conical surface inside insert, the center line of punch 6 and four-column hydraulic press slide block plane orthogonal during installation.Vacuum tube 8, compo pipe 9 and recipient 2 adopt self sealss gas thread to be connected, and body is equipped with valve respectively, before infiltration by squeeze casting, close vacuum tube 8, compo pipe 9, make itself and recipient 2, graphite mo(u)ld 3, insert group 4, interior cushion block 1 form confined space; The axial force of extrusion process convex mould 6 changes the radial load of insert group 4 into, by liquid alloy infiltration in precast body.
Embodiment of the method 1: a kind of C
f/ Mg composite material thin wall profiled piece manufacture method, selects AZ91D magnesium alloy, the beautiful T36 carbon fabric perform of platform.
Step one: the preparation of thin-wall special-shaped precast body.12K Unidirectional fiber 0 °/90 ° is wound in profiled piece and carries out the stitching of thickness direction.The precast body made is placed in chemical vapor deposition stove and carries out chemical vapour deposition (CVD), and solidification precast body also deposits pyrocarbon coating at fiber surface.
Step 2: the installation of building mortion.Punch 6 is fixed on four-column hydraulic press slide block, ensures its center line and slide block plane orthogonal; Interior cushion block 1 is embedded recipient 2 completely, closely cooperates with recipient 2 inwall; Require that the graphite mo(u)ld 3 of processing is arranged on interior cushion block 1 top according to precast body outer wall dimension; Continuous fiber tubular precast body puts into recipient 2, fits with inside graphite mo(u)ld 3; Insert group 4 loads in recipient 2 process, and eight locator slides of its bottom surface and eight locating dowels on interior cushion block 1 top closely cooperate, in order to ensure the track in insert group 4 motion process, and with the concentricity of recipient 2 inwall; Retainer ring 5 is bolted to recipient 2 top; After correcting the concentricity of recipient 2 inwall and punch 6, recipient 2 is closely fixed on compressor operation platform; Mounting vacuum tube 8, compo pipe 9 respectively.
Step 3: C
fthe preparation of/Mg composite material thin wall profiled piece.Utilize vavuum pump to vacuumize shaping die cavity, vacuum is 10
-3~ 10
-2pa; Matrix alloy be heated to 760 DEG C and be incubated 0.5 ~ 1h, mold heated to 575 ~ 650 DEG C; In alloy melting device, pass into argon gas, device internal pressure reaches 0.1 ~ 0.3MPa, is pressed into by aluminium alloy in the confined space formed by interior cushion block 1, recipient 2, graphite mo(u)ld 3, insert group 4, retainer ring 5, vacuum tube 8 and compo pipe 9; Close vacuum tube 8, compo pipe 9, start four-column hydraulic press, slide block drives punch 6 vertically descending with the speed of 0.2 ~ 0.5mm/s, by punch 6-insert group 4, the axial force along punch 6 direction is converted into radial load by mechanism, in the process of radially moving, adjacent insert contact area reduces gradually, but still remains closed.Now, exert pressure 20 ~ 50MPa on extruding insert alloy liquid surface, aluminium alloy is pressurize 20 ~ 80min in the airtight cylindrical spaces formed by interior cushion block 1, recipient 2, graphite mo(u)ld 3, insert group 4, retainer ring 5, vacuum tube 8 and compo pipe 9, liquid magnesium alloy has infiltrated in continuous fiber tubular precast body, obtains C
f/ Mg composite material thin wall profiled piece; Treat that infiltration process thoroughly completes, exit punch 6.
Step 4: C
fthe demoulding of/Mg composite material thin wall profiled piece.After having extruded, treat that fibrous composite is cooled to room temperature, remove retainer ring 5; To be stood upside down by recipient 2 placement, be heated to 400 DEG C, cylindrical shell expands, and sticking to mould resistance reduces; Starting four-column hydraulic press makes slide block drive punch 6 descending, until eject graphite mo(u)ld 3, insert group 4 and composite; Fix graphite mo(u)ld 3 from outside, tool holding insert is inwardly shunk simultaneously, i.e. the company of completing C
fthe demoulding of/Mg composite material thin wall profiled piece.
Step 5: machining is shaped.After cylindrical member cooling, adopt machining to be shaped the profiled piece of needs, then heat-treat and finished machined.
Embodiment of the method 2: a kind of C with interior outward flange
fthe manufacture method of/Mg composite material thin wall profiled piece, selects AZ91D magnesium alloy, eastern beautiful T700 carbon fabric perform.
The difference of the present embodiment and embodiment 1 is cross sectional shape and the prefabricated carbon fiber shape of described insert group 4 shaped portion, and namely the present invention may be used for the C realizing different cross section shape
fthe preparation of/Mg composite material thin wall profiled piece.Other bulking blocks, annexation are identical with embodiment 1 with implementation step.Machining is utilized to be shaped the C of outward flange in band
f/ Mg composite material thin wall profiled piece, then heat-treats and finished machined.
Claims (2)
1. a C
fthe liquid-solid pressure former of/Mg composite material thin wall profiled piece, is characterized in that: comprise interior cushion block (1), recipient (2), graphite mo(u)ld (3), insert group (4), retainer ring (5), punch (6), vacuum tube (8) and compo pipe (9); Described recipient (2) is arranged on compressor operation platform, recipient (2) is respectively arranged with vacuum hole and alloy hole near the both sides on upper edge, and vacuum hole and alloy hole are threaded with vacuum tube (8) and compo pipe (9) self sealss respectively; Interior cushion block (1) is positioned at recipient (2) bottom, and embed recipient (2) completely, closely cooperate with recipient (2) inwall, interior cushion block (1) plays a supportive role to graphite mo(u)ld (3), insert group (4) and precast body (7), the upper surface of interior cushion block (1) has eight locating dowels, correspond respectively to eight locator slides of insert group (4) bottom surface, in order to ensure the track in insert group (4) motion process, and with the concentricity of recipient (2) inwall, locator slide coordinates with locating dowel closely; It is inner that graphite mo(u)ld (3) is arranged on recipient (2); Insert group (4) is made up of eight parts, is respectively four and supports insert, four extruding inserts, eight locator slides of corresponding insert group (4) bottom surface, and each insert upper is processed with groove, is convenient to the tool holding demoulding; Supporting inside insert is a conical surface, and inside four support inserts, cone match forms imperfect cone, coordinates and form cylindrical shell outside eight inserts; Insert group (4) is arranged on recipient (2) inner chamber, ensure coordinating between the locator slide of insert group (4) bottom side with the locating dowel on the upside of interior cushion block (1), adjacent insert contact area in the process of radially moving reduces gradually, but still remains closed; Retainer ring (5) is bolted to the top of recipient (2); Punch (6) is cone structure, in order to ensure in extrusion process with support fully contacting of the conical surface inside insert, the center line of punch (6) and four-column hydraulic press slide block plane orthogonal during installation.
2. one kind adopts the C of device described in claim 1
fthe liquid-solid press forming method of/Mg composite material thin wall profiled piece, is characterized in that comprising the following steps:
Step one: continuous fiber is made cylindrical member and carries out the stitching of thickness direction; The fiber preform made is placed in chemical vapor deposition stove and carries out chemical vapour deposition (CVD), solidification precast body at surface deposition pyrocarbon coating;
Step 2: be fixed on four-column hydraulic press slide block by punch (6), ensures its center line and slide block plane orthogonal; Interior cushion block (1) is embedded recipient (2) completely, closely cooperates with recipient (2) inwall; According to precast body (7) outer wall dimension, the graphite mo(u)ld processed (3) is arranged on interior cushion block (1) upper surface; Precast body (7) puts into recipient (2), fits with graphite mo(u)ld (3) inner side; Insert group (4) loads in recipient (2) process, eight locator slides of its bottom surface and eight locating dowels on interior cushion block (1) top closely cooperate, to ensure the track in insert group (4) motion process, and with the concentricity of recipient (2) inwall; Retainer ring (5) is bolted to recipient (2) top; After correcting the concentricity of recipient (2) inwall and punch (6), recipient (2) is closely fixed on compressor operation platform; Mounting vacuum tube (8) and compo pipe (9) respectively;
Step 3: utilize vavuum pump to vacuumize shaping die cavity, vacuum is 10
-3~ 10
-2pa; Matrix alloy be heated to 760 DEG C and be incubated 0.5 ~ 1h, mold heated to 575 ~ 650 DEG C; Argon gas is passed in alloy melting device, device internal pressure reaches 0.1 ~ 0.3MPa, is pressed into by aluminium alloy in the confined space formed by interior cushion block (1), recipient (2), graphite mo(u)ld (3), insert group (4), retainer ring (5), vacuum tube (8) and compo pipe (9); Close vacuum tube (8) and compo pipe (9), start four-column hydraulic press, slide block drives punch (6) vertically descending with the speed of 0.2 ~ 0.5mm/s, by punch (6), insert group (4) mechanism, the axial force along punch (6) direction is converted into radial load, in the process of radially moving, adjacent insert contact area reduces gradually, but still remains closed; Now, exert pressure 20 ~ 50MPa on extruding insert alloy liquid surface, aluminium alloy is pressurize 20 ~ 80min in the airtight cylindrical spaces formed by interior cushion block (1), recipient (2), graphite mo(u)ld (3), insert group (4), retainer ring (5), vacuum tube (8) and compo pipe (9), liquid AZ91D magnesium alloy has infiltrated in continuous fiber tubular precast body, obtains C
f/ Mg composite material thin wall profiled piece; Treat that infiltration process thoroughly completes, exit punch (6);
Step 4: after having extruded, treats that fibrous composite is cooled to room temperature, removes retainer ring (5); Stood upside down by recipient (2) and place, be heated to 400 DEG C, cylindrical shell expands, and sticking to mould resistance reduces; Starting four-column hydraulic press makes slide block drive punch (6) descending, until eject graphite mo(u)ld (3), insert group (4) and composite; Fix graphite mo(u)ld (3) from outside, tool holding insert is inwardly shunk simultaneously, completes C
fthe demoulding of/Mg composite material thin wall profiled piece;
Step 5: after cylindrical member cooling, adopts machining to be shaped the cylindrical member of needs, then heat-treats and finished machined.
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| CN109986722B (en) * | 2017-12-29 | 2024-01-02 | 尹军华 | Processing device for carbon fiber composite material cascade and cascade |
| CN109367050B (en) * | 2018-12-10 | 2024-05-03 | 哈尔滨玻璃钢研究院有限公司 | Vertical winding device for composite material thin-wall high-flange cylinder and manufacturing method |
| CN112296314B (en) * | 2020-09-21 | 2021-12-24 | 西北工业大学 | Preparing the C with aluminum foil coated on the surface by compoundingfDevice and method for/Mg composite material member |
| CN114211204B (en) * | 2021-12-21 | 2023-02-03 | 北京星航机电装备有限公司 | Gamma-shaped half-section end ring and superplastic forming method thereof |
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