CN104493099B - The core of many inner cavity revolution body structural member - Google Patents
The core of many inner cavity revolution body structural member Download PDFInfo
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- CN104493099B CN104493099B CN201410791553.3A CN201410791553A CN104493099B CN 104493099 B CN104493099 B CN 104493099B CN 201410791553 A CN201410791553 A CN 201410791553A CN 104493099 B CN104493099 B CN 104493099B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
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Abstract
The present invention relates to the core of a kind of many inner cavity revolution body structural member, including the core base being embedded in nowel moulding sand top, the center, upper surface of core base is stacked with bottom core, and the top of bottom core is stacked with middle core, and the top of middle core is stacked with top core；Core base, bottom core, middle core and top core coaxial line；The shape of bottom core is consistent with the shape of the lower revolution inner chamber of structural member, and the shape of middle core is consistent with the shape of revolution inner chamber in the middle of structural member, and the shape of top core is consistent with the shape of the upper rotary inner chamber of structural member.Core center is provided with mandrel, and mandrel includes mandrel mobile jib and is connected to mandrel female end and the mandrel nose at its two ends, and the mandrel nose of top can be plugged in the mandrel female end of lower section.Core box includes core box base plate and core box side plate, and the center of core box base plate is plugged with mandrel.The present invention can realize the shaping of large-scale multistage high-precision rotary body foundry goods complicated inner cavity structure.
Description
Technical field
The present invention relates to the core of a kind of many inner cavity revolution body structural member, belong to metal casting technique field.
Background technology
In field of metal casting technology, diameter is called large-sized structural parts more than 0.5m, highly structural member more than more than 1.5m.For large-scale many inner cavity revolution body structural member, classical production process is first carry out segmentation by the manufacture difficulty of inner chamber, then is respectively completed casting, the processing of each section, and scheme finally with bolts realizes the assembling of integral structure component.For ensureing that there is sufficient intensity bolt junction, general adpting flange disc thickness is the multiple of rotary body wall thickness, causes that organization plan has yielded to state of arts, adds pts wt.
Along with the continuous upgrading of product, structural member increasingly proposing higher lightweight requirements, section structural even adopts high-strength magnesium alloy to substitute high strength alumin ium alloy.Large-scale many inner cavity revolution body structural member adopts the process program that conventional bolt connects to be difficult to meet the requirement of novel product, adopts the process program of one piece cast form to become one of the technological problems that must solve in novel product development and production process.
Manufacture casting mold die cavity with external mold and be called moulding with the outer surface forming foundry goods, be called with the inner surface forming foundry goods with core box manufacture core and make core.No matter it is high strength alumin ium alloy, or high-strength magnesium alloy material, to formulate in casting process scheme process at large-scale multistage revolving body foundry goods, the process program of middle core is to determine the key factor that can one piece cast form realize.
Split casting inner-cavity structure size is ensured by the dimensional accuracy of middle core box completely, and one piece casting inner-cavity structure size by overlapping core box and core assembly common guarantee more, one piece casting single core cavity dimension process control point is several times of the single foundry goods of split casting, even tens times, the control difficulty amplification of its inner chamber size is bigger.Split sand casting multistage again is assembled into the scheme of product, owing to core box model firstly there are certain error, certain error is there is again from core box model to sand mold, certain error is formed again to casting from sand mold, the last concaveconvex structure formed by sand mold carries out assembling and yet suffers from certain error, therefore the precision of sand casting generally can only achieve the requirement of CT11 grade in " GB/T6414-1999 GB Casting tolerance standard ", if the requirement reaching CT9 grade is excellent.Precision more than casting field CT9 grade is called high accuracy, and the casting of high-precision configuration part must adopt precision casting process, and traditional sand casting process cannot meet.
Additionally, the depth-width ratio of split casting intermediate core is general in the reasonable scope, and the depth-width ratio of one piece casting intermediate core is close to even more than three times, how ensureing that the perpendicularity of intermediate core is the problem that one piece casting must solve.Additionally, in casting pouring, forming process, the action of gravity that bottom intermediate core is axial owing to being subject to overall intermediate core, it is radially producing outside ess-strain, this will have a strong impact on the radial yield of bottom intermediate core, it is easy to causes that foundry goods relative position radial dimension is overproof or cracks.
Summary of the invention
It is an object of the invention to, overcome problems of the prior art, it is provided that the core of a kind of many inner cavity revolution body structural member, it is possible to achieve the shaping of large-scale multistage high-precision rotary body foundry goods complicated inner cavity structure.
For solving above technical problem, a kind of core of many inner cavity revolution body structural member of the present invention, including the core base being embedded in nowel moulding sand top, the center, upper surface of described core base is stacked with bottom core, the top of described bottom core is stacked with middle core, and the top of described middle core is stacked with top core；Described core base, bottom core, middle core and top core coaxial line；The shape of described bottom core is consistent with the shape of the lower revolution inner chamber of structural member, and the shape of described middle core is consistent with the shape of revolution inner chamber in the middle of structural member, and the shape of described top core is consistent with the shape of the upper rotary inner chamber of structural member.
Relative to prior art, the present invention achieves following beneficial effect: relative to the Sectional Cast of tradition sand casting, then bolt connects；The present invention adopts stacked bottom core, middle core and top core that the inner surface of structural member is integrally formed, and makes the cast molding of many inner cavity revolution body structural member, and the structural member good integrity cast is lightweight.
As the preferred version of the present invention, described middle core includes more than the two-layer that is sequentially stacked from bottom to top or three layers.
As the improvement of the present invention, described core base is at least provided with four braced wings, and each braced wing is radially symmetrical protruding centered by the axis of core base, and the end face of the end face of each braced wing and described core base is positioned on same horizontal plane.Core base is arranged with multiple braced wing, both the floor space of core base had been increased, even support is formed again in all directions, both improve core base and support the weight capacity of core, in turn ensure that the stability of core and perpendicularity, make the core will not run-off the straight, it is ensured that to fill the form and position of core assembly and outer sand mold in type, forming process and meet technological requirement.
Improvement as the present invention, described bottom core, middle core and top core are respectively equipped with the mandrel mobile jib being positioned at core sand axial centre, described mandrel mobile jib is tubular structure, the upper end of described mandrel mobile jib is provided with mobile jib upper guide bush, the lower end of described mandrel mobile jib is provided with under mobile jib guide pin bushing, described mobile jib upper guide bush is connected to mandrel female end, guide pin bushing is connected under described mobile jib mandrel nose, described mandrel female end and mandrel nose respectively with described mandrel mobile jib interference fit；The upper surface of described mandrel female end is equal with the end face of core sand and center is provided with the mandrel female end bellmouth of concave downward, the lower end of described mandrel nose is provided with mandrel nose conical head, described mandrel nose conical head stretch out outside the bottom surface of core sand and with can with described mandrel female end bellmouth interference fit.The mandrel combined by mandrel mobile jib, mandrel female end and mandrel nose runs through each core along axis, the mandrel nose conical head of top core is plugged in the mandrel female end bellmouth of lower section core, and both interference fit, it is ensured that the axiality between docking core.Each section of mandrel both can bear the weight of respective core, and the weight of top core can be transmitted to core base by mandrel, the weight that lower section core sand bears top core is avoided radially to produce outside ess-strain, the radial yield making bottom core, middle core and top core is all fine, it is to avoid foundry goods relative position radial dimension is overproof or cracks.Formed by mandrel between multistage core and be rigidly connected and devise stable core base, the non-accurate to dimension of inner chamber can reach CT6～CT8 grade in GB/T6414, utilizes low-pressure casting to achieve the shaping of large-scale multistage high-precision rotary body foundry goods complicated inner cavity structure.
Improvement as the present invention, the both sides, middle part of described mandrel mobile jib are symmetrical along short transverse and are uniformly provided with multiple tracks arbor draw-in groove, each described arbor draw-in groove is parallel to each other and horizontally extending, each described arbor draw-in groove is plugged with crab respectively and for matched in clearance, the top of every layer of crab is overlapped with the secondary arbor perpendicular with crab respectively, and described secondary arbor is symmetrically positioned in the axis both sides of described mandrel mobile jib.Crab is provided and axially supports by the arbor draw-in groove on mandrel mobile jib, and secondary arbor is provided and axially supports by crab, and the weight of crab and the secondary common support core sand of arbor makes core have enough strength and stiffness, it is prevented that be deformed and rupture；Arbor draw-in groove and crab matched in clearance ensure that operability mandrel and crab taken out in sand removal process from cast-internal.
Improvement as the present invention, the lower surface of described mandrel female end is provided with mandrel female end cylindrical hole, described mandrel female end cylindrical hole is sleeved on the mobile jib upper guide bush of described mandrel mobile jib, the mandrel female end that the sidewall of described mandrel female end cylindrical hole is provided with through is pin-and-hole radially, the sidewall of described mobile jib upper guide bush is provided with on mobile jib radially pin-and-hole, the radially connected pin of mandrel female end through described mandrel female end radially pin-and-hole with on described mobile jib radially pin-and-hole mandrel female end is connected with described mandrel mobile jib.Mandrel female end cylindrical hole and mobile jib upper guide bush can ensure that the axiality of mandrel female end and mandrel mobile jib by interference fit, the radially connected pin of mandrel female end makes to be formed between mandrel female end and mandrel mobile jib to be rigidly connected, both ensure that the precision and stability of axially and radially size, in turn ensure that the intensity that overall structure lifting needs.
Improvement as the present invention, the upper surface of described mandrel nose is provided with mandrel nose cylindrical hole, described mandrel nose cylindrical hole is sleeved under the mobile jib of described mandrel mobile jib on guide pin bushing, the mandrel nose that the sidewall of described mandrel nose cylindrical hole is provided with through is pin-and-hole radially, under described mobile jib, the sidewall of guide pin bushing is provided with under mobile jib radially pin-and-hole, the radially connected pin of mandrel nose through described mandrel nose radially pin-and-hole with under described mobile jib radially pin-and-hole mandrel nose is connected with described mandrel mobile jib.Mandrel nose cylindrical hole can ensure that the axiality of mandrel nose and mandrel mobile jib with guide pin bushing under mobile jib by interference fit, the radially connected pin of mandrel nose makes to be formed between mandrel nose and mandrel mobile jib to be rigidly connected, both ensure that the precision and stability of axially and radially size, in turn ensure that the intensity that overall structure lifting needs.
Improvement as the present invention, the upper surface of described mandrel female end is provided with the axial pin-and-hole of mandrel female end, the lower surface of described mandrel nose is provided with the axial pin-and-hole of mandrel nose, being plugged with the axial alignment pin of mandrel in the described axial pin-and-hole of mandrel nose, the lower end of the axial alignment pin of described mandrel is plugged in the axial pin-and-hole of mandrel female end of next layer.The interference fit of the axial alignment pin of mandrel is possible to prevent between the mandrel nose of mandrel female end and grafting to relatively rotate, it is ensured that in the precision of circumferencial direction location and stability between the mandrel nose of mandrel female end and grafting.
As the improvement of the present invention, the center of described core base is provided with the core base mandrel location taper hole of concave downward, and described mandrel nose conical head is plugged on described core base mandrel location taper hole and both interference fit；The side of described core base mandrel location taper hole is provided with core base mandrel dowel hole, the lower surface of described mandrel nose is provided with the axial pin-and-hole of mandrel nose, and the lower end being plugged with the axial alignment pin of mandrel and the axial alignment pin of mandrel in the described axial pin-and-hole of mandrel nose is plugged in described core base mandrel dowel hole.Interference fit between mandrel nose conical head and core base mandrel location taper hole can ensure that coaxial line between mandrel and core base, and can ensure that perpendicularity between the two；The axial alignment pin of mandrel is possible to prevent mandrel and core base to relatively rotate, it is ensured that the extremely stable property of quality of fit.
As the improvement of the present invention, the axially middle part of described mandrel female end is provided with the mandrel female end screwed hole extended along axis, and described mandrel female end screwed hole is between described mandrel female end cylindrical hole and described mandrel female end bellmouth；The mandrel nose conical head of described mandrel nose is provided with the mandrel nose screwed hole extended internally along axis.Mandrel female end screwed hole and mandrel nose screwed hole can spin hanger respectively, make core can lift by crane from two ends, it is simple to core transhipment and upset；Lifting interface is provided, it is ensured that above operation has stronger operability for coremaking, core finishing, application and core overall package.
Improvement as the present invention, the core sand molding in core box respectively of described bottom core, middle core and top core, described core box includes core box base plate and the core box side plate of coaxial line, the excircle of described core box base plate is provided with the flange protruded upward, and the inner periphery of described flange is provided with core box base plate location inner conical surface；Described core box side plate is the cylinder that at least two tile surrounds, described core box side plate surround after lower end be provided with core box side plate location male cone (strobilus masculinus), described core box side plate location male cone (strobilus masculinus) be plugged on described core box base plate location inner conical surface in and both interference fit；The inner side of described core box base plate location inner conical surface is provided with core box base plate and axially positions hole, the inner side of described core box side plate location male cone (strobilus masculinus) is provided with core box side plate and axially positions hole, and described core box base plate axially positions in hole the upper end being plugged with core box side plate alignment pin and core box side plate alignment pin and is plugged on described core box side plate and axially positions in hole；The center of described core box base plate is provided with core box base plate conical head protruding upward, and the side of described core box base plate conical head is provided with core box base plate mandrel dowel hole；The upper surface of described mandrel female end is provided with the axial pin-and-hole of mandrel female end, and after described mandrel mobile jib is inverted together with mandrel nose and mandrel female end entirety, described mandrel female end bellmouth is plugged on described core box base plate conical head and both interference fit；Being plugged with the axial alignment pin of mandrel in described core box base plate mandrel dowel hole, the upper end of the axial alignment pin of described mandrel is plugged in the described axial pin-and-hole of mandrel female end.The interference fit of core box side plate location male cone (strobilus masculinus) and core box base plate location inner conical surface ensure that axiality and the cylindricity of core box base plate and core box side plate；Core box side plate alignment pin is possible to prevent between core box side plate and core box base plate to relatively rotate, it is ensured that the precision of both fit dimensions and stability.The interference fit of mandrel female end bellmouth and core box base plate conical head can ensure that the axiality of mandrel and core box, the axial alignment pin of mandrel can ensure that mandrel will not and core box base plate between produce relative rotation, it is ensured that the precision of both cooperations and stability.
The mandrel mobile jib of the present invention, mandrel female end, mandrel nose, core base, core box base plate, core box side plate and each connecting pin are metalwork polish and form, by the high accuracy of structural member after the guarantee molding of the high accuracy of above finished part, rather than the cooperation of core sand is relied on to determine precision.Utilizing the integral rigidity between core base and multiple mandrel to connect, radial direction and axial stable connection are reliable, coordinate precision, it is ensured that fill the change in size of bottom core in type, forming process and meet technological requirement；The weight of core is undertaken by mandrel and transmits, it is to avoid lower section core sand bears the weight of top core and radially producing outside ess-strain, and the radial yield of whole core is all fine.Though frock of the present invention is many, but good manufacturability, processing and simple to operate, for diameter more than 0.5m, highly large-sized structural parts more than more than 1.5m, adopt sand casting process that the cylindricity of monolithic devices core or conicity just can be made to reach ± 0.5mm, axially and radially dimensional accuracy can reach ± 1mm, the casting rate of the CT6～CT8 dimensional requirement to integral sand core in " GB/T6414-1999 GB Casting tolerance standard " can be met, it is achieved that the overall precision form of large-scale multistage high-precision rotary body foundry goods complicated inner cavity structure.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation, and accompanying drawing only provides reference and use is described, is not used to the restriction present invention.
Fig. 1 is the front view of the core of the present invention many inner cavity revolution body structural member.
Fig. 2 is the three-dimensional exploded view of Fig. 1.
Fig. 3 is the front view of mandrel mobile jib in the present invention.
Fig. 4 is the axonometric chart of Fig. 3.
Fig. 5 is the front view of mandrel female end in the present invention.
Fig. 6 is the axonometric chart of Fig. 5.
Fig. 7 is the front view of SMIS crown of roll end of the present invention.
Fig. 8 is the axonometric chart of Fig. 7.
Fig. 9 is the axonometric chart of sand core internal structural member.
Figure 10 is the state diagram that each section of mandrel tries to assemble on core base.
Figure 11 is the front view of SMIS box plate of the present invention.
Figure 12 is the axonometric chart of Figure 11.
Figure 13 be in the present invention core box side plate surround after front view.
Figure 14 is the axonometric chart of Figure 13.
Figure 15 is the front view in the present invention after core box assembling.
Figure 16 is the axonometric chart of Figure 15.
Figure 17 is the axonometric chart of core after the core box demoulding.
In figure: 1. mandrel mobile jib；1a. mobile jib upper guide bush；Guide pin bushing under 1b. mobile jib；Radial direction pin-and-hole on 1c. mobile jib；Radial direction pin-and-hole under 1d. mobile jib；1e. arbor draw-in groove；
2. mandrel female end；2a. mandrel female end cylindrical hole；2b. mandrel female end bellmouth；2c. mandrel female end is pin-and-hole radially；The axial pin-and-hole of 2d. mandrel female end；2e. mandrel female end screwed hole；
3. mandrel nose；3a. mandrel nose cylindrical hole；3b. mandrel nose conical head；3c. mandrel nose is pin-and-hole radially；The axial pin-and-hole of 3d. mandrel nose；3e. mandrel nose screwed hole；
4. the radially connected pin of mandrel female end；5. the radially connected pin of mandrel nose；6. the axial alignment pin of mandrel；7. crab；8. secondary arbor；
9. core base；9a. braced wing；9b. core base mandrel location taper hole；9c. core base mandrel dowel hole；9d. external mold setting circle post holes；9e. external mold location taper hole；
10. core box base plate；10a. core box base plate conical head；10b. core box base plate location inner conical surface；10c core box base plate mandrel dowel hole；10d. core box base plate axially positions hole；
11. core box side plate；11a. core box side plate location male cone (strobilus masculinus)；11b. core box side plate axially positions hole；
12. core box side plate alignment pin；13. core sand；14. nowel；A. bottom core；B. core in the middle of；C. top core.
Detailed description of the invention
As shown in Figure 1 and Figure 2, the core of many inner cavity revolution body structural member of the present invention, including the core base 9 being embedded in nowel 14 moulding sand top, the center, upper surface of core base 9 is stacked with bottom core A, the top of bottom core A is stacked with middle core B, and the top of middle core B is stacked with top core C；Core base 9, bottom core A, middle core B and top core C coaxial line；The shape of bottom core A is consistent with the shape of the lower revolution inner chamber of structural member, and the shape of middle core B is consistent with the shape of revolution inner chamber in the middle of structural member, and the shape of top core C is consistent with the shape of the upper rotary inner chamber of structural member.Middle core B includes more than the two-layer that is sequentially stacked from bottom to top or three layers.
Core base 9 at least provided with four braced wing 9a, each braced wing 9a centered by the axis of core base 9 radially symmetrical protruding, the end face of each braced wing 9a and the end face of core base 9 are positioned on same horizontal plane.
Region corresponding with the base of external mold on core base 9 is provided with external mold setting circle post holes 9d and external mold location taper hole 9e, in external mold setting circle post holes 9d and external mold location taper hole 9e, grafting external mold bearing pin and external mold realize positioning respectively, and the upper port aperture that external mold setting circle post holes 9d and external mold position taper hole 9e is different to avoid the anisotropy of external mold.
As shown in Fig. 3 to Fig. 9, bottom core A, middle core B and top core C are respectively equipped with the mandrel mobile jib 1 being positioned at core sand axial centre, mandrel mobile jib 1 is tubular structure, the upper end of mandrel mobile jib 1 is provided with mobile jib upper guide bush 1a, the lower end of mandrel mobile jib 1 is provided with under mobile jib guide pin bushing 1b, mobile jib upper guide bush 1a is connected to mandrel female end 2, under mobile jib, guide pin bushing 1b is connected to mandrel nose 3, mandrel female end 2 and mandrel nose 3 respectively with mandrel mobile jib 1 interference fit；The upper surface of mandrel female end 2 is equal with the end face of core sand 13 and center is provided with the mandrel female end bellmouth 2b of concave downward, the lower end of mandrel nose 3 be provided with mandrel nose conical head 3b, mandrel nose conical head 3b stretch out outside the bottom surface of core sand 13 and with can with mandrel female end bellmouth 2b interference fit.
The both sides, middle part of mandrel mobile jib 1 are symmetrical along short transverse and are uniformly provided with multiple tracks arbor draw-in groove 1e, each arbor draw-in groove 1e is parallel to each other and horizontally extending, each arbor draw-in groove 1e is plugged with crab 7 respectively and for matched in clearance, the top of every layer of crab 7 is overlapped with the secondary arbor 8 perpendicular with crab 7 respectively, and secondary arbor 8 is symmetrically positioned in the axis both sides of mandrel mobile jib 1.
The lower surface of mandrel female end 2 is provided with mandrel female end cylindrical hole 2a, mandrel female end cylindrical hole 2a is sleeved on the mobile jib upper guide bush 1a of mandrel mobile jib 1, the mandrel female end that the sidewall of mandrel female end cylindrical hole 2a is provided with through is pin-and-hole 2c radially, the sidewall of mobile jib upper guide bush 1a is provided with on mobile jib radially pin-and-hole 1c, the radially connected pin 4 of mandrel female end through mandrel female end radially pin-and-hole 2c with on mobile jib radially pin-and-hole 1c mandrel female end 2 is connected with mandrel mobile jib 1.
The upper surface of mandrel nose 3 is provided with mandrel nose cylindrical hole 3a, mandrel nose cylindrical hole 3a is sleeved under the mobile jib of mandrel mobile jib 1 on guide pin bushing 1b, the mandrel nose that the sidewall of mandrel nose cylindrical hole 3a is provided with through is pin-and-hole 3c radially, under mobile jib, the sidewall of guide pin bushing 1b is provided with under mobile jib radially pin-and-hole 1d, the radially connected pin 5 of mandrel nose through mandrel nose radially pin-and-hole 3c with under mobile jib radially pin-and-hole 1d mandrel nose 3 is connected with mandrel mobile jib 1.
The upper surface of mandrel female end 2 is provided with the axial pin-and-hole 2d of mandrel female end, the lower surface of mandrel nose 3 is provided with the axial pin-and-hole 3d of mandrel nose, being plugged with the axial alignment pin 6 of mandrel in mandrel nose axial pin-and-hole 3d, the lower end of the axial alignment pin of mandrel 6 is plugged in the axial pin-and-hole 2d of mandrel female end of next layer.
The axially middle part of mandrel female end 2 is provided with the mandrel female end screwed hole 2e extended along axis, and mandrel female end screwed hole 2e is between mandrel female end cylindrical hole 2a and mandrel female end bellmouth 2b；The mandrel nose conical head 3b of mandrel nose 3 is provided with the mandrel nose screwed hole 3e extended internally along axis.
As shown in Figure 10, the center of core base 9 is provided with core base mandrel location the taper hole 9b, mandrel nose conical head 3b of concave downward and is plugged on core base mandrel location taper hole 9b and both interference fit；The side of core base mandrel location taper hole 9b is provided with core base mandrel dowel hole 9c, the lower surface of mandrel nose 3 is provided with the axial pin-and-hole 3d of mandrel nose, and the lower end being plugged with the axial alignment pin of mandrel 6 and the axial alignment pin 6 of mandrel in mandrel nose axial pin-and-hole 3d is plugged in core base mandrel dowel hole 9c.
As shown in Figure 11 to Figure 17, bottom core A, middle core B and top core C core sand molding in core box respectively, core box includes core box base plate 10 and the core box side plate 11 of coaxial line, the excircle of core box base plate 10 is provided with the flange protruded upward, and the inner periphery of flange is provided with core box base plate location inner conical surface 10b；The cylinder that core box side plate 11 surrounds at least two tile, core box side plate 11 surround after lower end be provided with core box side plate location male cone (strobilus masculinus) 11a, core box side plate location male cone (strobilus masculinus) 11a be plugged on core box base plate location inner conical surface 10b in and both interference fit；The inner side of core box base plate location inner conical surface 10b is provided with core box base plate and axially positions hole 10d, the inner side of core box side plate location male cone (strobilus masculinus) 11a is provided with core box side plate and axially positions hole 11b, and core box base plate axially positions the upper end being plugged with core box side plate alignment pin 12 and core box side plate alignment pin 12 in the 10d of hole and is plugged on core box side plate and axially positions in the 11b of hole；The center of core box base plate 10 is provided with core box base plate conical head 10a protruding upward, and the side of core box base plate conical head 10a is provided with core box base plate mandrel dowel hole 10c；The upper surface of mandrel female end 2 is provided with the axial pin-and-hole 2d of mandrel female end, and mandrel mobile jib 1 is together with after the overall inversion of mandrel nose 3 and mandrel female end 2, and mandrel female end bellmouth 2b is plugged on core box base plate conical head 10a and both interference fit；Being plugged with the axial alignment pin 6 of mandrel in core box base plate mandrel dowel hole 10c, the upper end of the axial alignment pin of mandrel 6 is plugged in the axial pin-and-hole 2d of mandrel female end.
The foregoing is only the preferably possible embodiments of the present invention, the non-scope of patent protection therefore limiting to the present invention.In addition to the implementation, the present invention can also have other embodiments.All employings are equal to replacement or the technical scheme of equivalent transformation formation, all fall within the protection domain of application claims.
Claims (10)
1. the core of inner cavity revolution body structural member more than a kind, including the core base being embedded in nowel moulding sand top, it is characterized in that: the center, upper surface of described core base is stacked with bottom core, the top of described bottom core is stacked with middle core, and the top of described middle core is stacked with top core；Described core base, bottom core, middle core and top core coaxial line；The shape of described bottom core is consistent with the shape of the lower revolution inner chamber of structural member, and the shape of described middle core is consistent with the shape of revolution inner chamber in the middle of structural member, and the shape of described top core is consistent with the shape of the upper rotary inner chamber of structural member；Described bottom core, middle core and top core are respectively equipped with the mandrel mobile jib being positioned at core sand axial centre, described mandrel mobile jib is tubular structure, the upper end of described mandrel mobile jib is provided with mobile jib upper guide bush, the lower end of described mandrel mobile jib is provided with under mobile jib guide pin bushing, described mobile jib upper guide bush is connected to mandrel female end, guide pin bushing is connected under described mobile jib mandrel nose, described mandrel female end and mandrel nose respectively with described mandrel mobile jib interference fit；The upper surface of described mandrel female end is equal with the end face of core sand and center is provided with the mandrel female end bellmouth of concave downward, the lower end of described mandrel nose is provided with mandrel nose conical head, described mandrel nose conical head stretch out outside the bottom surface of core sand and with described mandrel female end bellmouth interference fit.
2. the core of many inner cavity revolution body structural member according to claim 1, it is characterised in that: described middle core includes more than the two-layer that is sequentially stacked from bottom to top or three layers.
3. the core of many inner cavity revolution body structural member according to claim 1, it is characterized in that: described core base is at least provided with four braced wings, each braced wing is radially symmetrical protruding centered by the axis of core base, and the end face of the end face of each braced wing and described core base is positioned on same horizontal plane.
4. the core of many inner cavity revolution body structural member according to claim 1, it is characterized in that: the both sides, middle part of described mandrel mobile jib are symmetrical along short transverse and are uniformly provided with multiple tracks arbor draw-in groove, each described arbor draw-in groove is parallel to each other and horizontally extending, each described arbor draw-in groove is plugged with crab respectively and for matched in clearance, the top of every layer of crab is overlapped with the secondary arbor perpendicular with crab respectively, and described secondary arbor is symmetrically positioned in the axis both sides of described mandrel mobile jib.
5. the core of many inner cavity revolution body structural member according to claim 1, it is characterized in that: the lower surface of described mandrel female end is provided with mandrel female end cylindrical hole, described mandrel female end cylindrical hole is sleeved on the mobile jib upper guide bush of described mandrel mobile jib, the mandrel female end that the sidewall of described mandrel female end cylindrical hole is provided with through is pin-and-hole radially, the sidewall of described mobile jib upper guide bush is provided with on mobile jib radially pin-and-hole, the radially connected pin of mandrel female end through described mandrel female end radially pin-and-hole with on described mobile jib radially pin-and-hole mandrel female end is connected with described mandrel mobile jib.
6. the core of many inner cavity revolution body structural member according to claim 1 or 5, it is characterized in that: the upper surface of described mandrel nose is provided with mandrel nose cylindrical hole, described mandrel nose cylindrical hole is sleeved under the mobile jib of described mandrel mobile jib on guide pin bushing, the mandrel nose that the sidewall of described mandrel nose cylindrical hole is provided with through is pin-and-hole radially, under described mobile jib, the sidewall of guide pin bushing is provided with under mobile jib radially pin-and-hole, the radially connected pin of mandrel nose through described mandrel nose radially pin-and-hole with under described mobile jib radially pin-and-hole mandrel nose is connected with described mandrel mobile jib.
7. the core of many inner cavity revolution body structural member according to claim 1, it is characterized in that: the upper surface of described mandrel female end is provided with the axial pin-and-hole of mandrel female end, the lower surface of described mandrel nose is provided with the axial pin-and-hole of mandrel nose, being plugged with the axial alignment pin of mandrel in the described axial pin-and-hole of mandrel nose, the lower end of the axial alignment pin of described mandrel is plugged in the axial pin-and-hole of mandrel female end of next layer.
8. the core of many inner cavity revolution body structural member according to claim 1, it is characterized in that: the center of described core base is provided with the core base mandrel location taper hole of concave downward, and described mandrel nose conical head is plugged on described core base mandrel location taper hole and both interference fit；The side of described core base mandrel location taper hole is provided with core base mandrel dowel hole, the lower surface of described mandrel nose is provided with the axial pin-and-hole of mandrel nose, and the lower end being plugged with the axial alignment pin of mandrel and the axial alignment pin of mandrel in the described axial pin-and-hole of mandrel nose is plugged in described core base mandrel dowel hole.
9. the core of many inner cavity revolution body structural member according to claim 1, it is characterized in that: the axially middle part of described mandrel female end is provided with the mandrel female end screwed hole extended along axis, and described mandrel female end screwed hole is between described mandrel female end cylindrical hole and described mandrel female end bellmouth；The mandrel nose conical head of described mandrel nose is provided with the mandrel nose screwed hole extended internally along axis.
10. the core of many inner cavity revolution body structural member according to claim 1, it is characterized in that: the core sand molding in core box respectively of described bottom core, middle core and top core, described core box includes core box base plate and the core box side plate of coaxial line, the excircle of described core box base plate is provided with the flange protruded upward, and the inner periphery of described flange is provided with core box base plate location inner conical surface；Described core box side plate is the cylinder that at least two tile surrounds, described core box side plate surround after lower end be provided with core box side plate location male cone (strobilus masculinus), described core box side plate location male cone (strobilus masculinus) be plugged on described core box base plate location inner conical surface in and both interference fit；The inner side of described core box base plate location inner conical surface is provided with core box base plate and axially positions hole, the inner side of described core box side plate location male cone (strobilus masculinus) is provided with core box side plate and axially positions hole, and described core box base plate axially positions in hole the upper end being plugged with core box side plate alignment pin and core box side plate alignment pin and is plugged on described core box side plate and axially positions in hole；The center of described core box base plate is provided with core box base plate conical head protruding upward, and the side of described core box base plate conical head is provided with core box base plate mandrel dowel hole；The upper surface of described mandrel female end is provided with the axial pin-and-hole of mandrel female end, and after described mandrel mobile jib is inverted together with mandrel nose and mandrel female end entirety, described mandrel female end bellmouth is plugged on described core box base plate conical head and both interference fit；Being plugged with the axial alignment pin of mandrel in described core box base plate mandrel dowel hole, the upper end of the axial alignment pin of described mandrel is plugged in the described axial pin-and-hole of mandrel female end.
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| CN201410791553.3A CN104493099B (en) | 2014-12-19 | 2014-12-19 | The core of many inner cavity revolution body structural member |
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| CN109434024B (en) * | 2018-12-25 | 2020-05-08 | 青岛金环汽配制造有限公司 | Machining equipment and machining process for gear ring blank |
| CN111054893A (en) * | 2019-12-30 | 2020-04-24 | 山东常林铸业有限公司 | Core assembly structure and process for end cover casting |
| CN111558690B (en) * | 2020-06-15 | 2021-07-27 | 新兴铸管股份有限公司 | Core box of annular sand core |
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| US4273182A (en) * | 1979-12-07 | 1981-06-16 | Ford Motor Company | Core assembly and the method of making and using such assembly |
| JPS57195555A (en) * | 1981-05-29 | 1982-12-01 | Sintokogio Ltd | Molding method for core |
| JP2763051B2 (en) * | 1993-08-06 | 1998-06-11 | 本田技研工業株式会社 | Mold casting method |
| CN1701879A (en) * | 2005-06-02 | 2005-11-30 | 栾文翰 | Method for integral casting of multi-chamber blast furnace tuyere |
| CN102248130B (en) * | 2011-06-17 | 2013-05-01 | 河南豫兴铸造有限公司 | Manufacturing process of core assembly for butterfly valve body |
| CN202779618U (en) * | 2012-10-10 | 2013-03-13 | 四川省祥业机械铸造有限公司 | Core print step positioning structure |
| CN203621396U (en) * | 2013-10-24 | 2014-06-04 | 重庆新红旗缸盖制造有限公司 | Combined sand core for miniature vehicle four-cylinder body |
| CN204449210U (en) * | 2014-12-19 | 2015-07-08 | 扬州峰明金属制品有限公司 | A kind of core of many inner cavity revolution body structural member |
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Address after: 225117 9, Feng Ming Road, Fang Xiang Industrial Park, Hanjiang District, Yangzhou, Jiangsu Patentee after: Yangzhou Feng Ming photoelectric New Material Co., Ltd. Address before: 225117 9, Feng Ming Road, Fang Xiang Industrial Park, Hanjiang District, Yangzhou, Jiangsu Patentee before: Yangzhou Feng Ming Metal Products Co., Ltd. |