CN114799067A - Aluminum piston mold with one-mold double-cavity casting structure - Google Patents
Aluminum piston mold with one-mold double-cavity casting structure Download PDFInfo
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- CN114799067A CN114799067A CN202210502289.1A CN202210502289A CN114799067A CN 114799067 A CN114799067 A CN 114799067A CN 202210502289 A CN202210502289 A CN 202210502289A CN 114799067 A CN114799067 A CN 114799067A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/086—Filters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
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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
An aluminum piston mold having a one-mold double-cavity casting structure, comprising: the middle top edge of one side surface of the right half outer mold is integrally and vertically provided with a semi-open type aluminum liquid pouring cup, the bottom end of the aluminum liquid pouring cup is longitudinally communicated with a sprue, and the lower part of the sprue is fixedly covered with a filter screen through a hanging nail; the middle top edge of one side surface of the left half outer die is integrally and vertically provided with a gate stop block, and the side surface of the left half outer die is transversely provided with a cross gate; the end parts of the butt joint surfaces of the left half outer mold and the right half outer mold are respectively vertically and symmetrically provided with aluminum piston blank cavities in a penetrating manner; the invention adopts a one-mold double-cavity design, can better adapt to the operating efficiency of an automatic casting machine, effectively reduces the manufacturing process of the aluminum piston blank and improves the production efficiency of the casting; the aluminum liquid temperature enters through the sprue and the cross gate, the loss of the aluminum temperature is small, and meanwhile, the filter screen plays dual roles of slag blocking and buffering, so that the yield of the casting is ensured.
Description
Technical Field
The invention belongs to the technical field of aluminum piston molds, and particularly relates to an aluminum piston mold with a one-mold double-cavity casting structure.
Background
The aluminum piston is one of the main parts of the four-stroke (air suction, compression, power application and exhaust) of the engine, and is used for generating power when the engine works in a severe working condition. In recent years, along with the higher and higher quality requirement of the market on the aluminum piston, the requirements on the performance design of an aluminum piston mold and the adaptive aluminum piston blank manufacturing process are required to be improved, the traditional manual gravity casting of the aluminum piston is replaced by an automatic casting machine, and along with the popularization and application of the automatic casting machine in the industrial field, the design of the structure of the aluminum piston mold, the system forming, the integrated cooperation with a robot system, the cast-state quenching process and the like are important factors in the process of examining the automatic gravity casting revolution.
In the prior art, common aluminum piston molds are mostly designed in a single cavity body, and cannot adapt to the operating efficiency of an automatic casting machine, so that the process of an aluminum piston blank is prolonged, and the production efficiency of castings is reduced; meanwhile, the yield of the one-step casting molding of the common aluminum piston mold is low, the yield of the casting cannot be guaranteed, the manufacturing cost of an enterprise is increased, and the benefit is reduced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an aluminum piston mould with a one-mould double-cavity casting structure, and the specific technical scheme is as follows:
an aluminum piston mold having a one-mold double-cavity casting structure, the aluminum piston mold comprising:
the middle top edge of one side surface of the right half outer die is integrally and vertically provided with a semi-open type aluminum liquid pouring cup, the bottom end of the aluminum liquid pouring cup is longitudinally communicated with a sprue, the lower part of the sprue is fixedly covered with a filter screen through a hanging nail, and the outer surface of the filter screen is flush with the side surface corresponding to the right half outer die;
the middle top edge of one side surface of the left half outer die is integrally and vertically provided with a gate stop block, and the side surface of the left half outer die is transversely provided with a cross gate which is positioned under the gate stop block; after the left half outer mold and the right half outer mold are in butt joint and matched, the sprue stop block is in close fit with the molten aluminum sprue cup, and the bottom end of the sprue is communicated with the middle of the cross gate in an intersecting manner; the end parts of the butt joint surfaces of the left half outer mold and the right half outer mold are respectively vertically and symmetrically provided with aluminum piston blank cavities in a penetrating manner, and the end parts of the cross runners are respectively communicated with the corresponding aluminum piston blank cavities; a groove cavity is radially and symmetrically formed in each aluminum piston blank cavity, a piston pin seat core block is inserted and matched in each groove cavity, and the outer end of each piston pin seat core block is communicated and butted with a circulating water cooling pipe joint body;
the top opening of each aluminum piston blank cavity is axially and hermetically clamped and matched with the upper die, the top surface of the upper die is vertically communicated with a heat-insulation riser sleeve, the top surface of the heat-insulation riser sleeve is axially pressed with a protection riser pressing plate, and the end part of the protection riser pressing plate is fixedly connected with the top surface of the upper die through bolts;
the bottom opening of each aluminum piston blank cavity is axially communicated, spliced and matched with the piston stop sleeve, and the bottom surface of the piston stop sleeve is axially inserted with the piston inner die.
Furthermore, positioning pin holes are symmetrically formed in the end portion of the butt joint face of the right half outer die inwards respectively, die closing positioning pins are vertically and symmetrically connected to the end portion of the butt joint face of the left half outer die respectively, and the die closing positioning pins are in plug-in fit with the corresponding positioning pin holes.
Furthermore, the circulating water cooling pipe joint body comprises an insert cooling channel, one end of the insert cooling channel is communicated and butted with the outer end of the piston pin seat core block, the other end of the insert cooling channel is communicated and butted with a water inlet pipe joint in the axial direction, and a water outlet pipe joint is communicated and butted above the side face of the outer end part of the insert cooling channel.
Furthermore, the positioning keys are respectively installed on the edges of the top openings of the aluminum piston blank cavities in the left half outer die, the upper die faces towards the side edges of the left half outer die, and the positioning keys are in clamping fit with the corresponding positioning key grooves.
Furthermore, a spigot sleeve positioning pin is arranged on the top surface of the piston spigot sleeve and is in clamping fit with a pin hole formed in the bottom surface of the right half outer die.
Furthermore, feeding cavities with directional structures are symmetrically formed in the middle of the butt joint surfaces of the right half outer mold and the left half outer mold respectively, one side of each feeding cavity is communicated with the end part corresponding to the cross runner, and the other side of each feeding cavity is communicated with the cavity corresponding to the aluminum piston blank; the feeding cavity is characterized in that a plurality of filling holes which are arranged in a lattice shape are formed inwards in the inner bottom surface of the feeding cavity, and aluminum silicate fiber heat-insulating materials are filled in the filling holes.
Furthermore, the inner bottom surface of the cross gate is flush with the inner bottom surface of the feeding cavity, and the inner bottom surface of the gate opening of the feeding cavity communicated with the aluminum piston blank cavity is higher than the inner bottom surface of the cross gate.
Further, the piston inner die comprises an inner die center core, the inner die center core is of an inverted T-shaped structure, an inner die pin base core and an inner die edge core are respectively and symmetrically fitted on the outer surface of the vertical part of the inner die center core in a radially-symmetrical manner in a fitting manner, and the end part of the inner surface of the inner die pin base core adjacent to the inner die edge core is fitted with the side surface of the inner die edge core in a fitting manner; the horizontal part of the inner mold center core is fixedly screwed with the corresponding inner mold edge core through a first locking bolt; the bottom surface of the horizontal part of the inner die center core is longitudinally and fixedly butted with a center core connecting block through at least two second locking bolts; and a piston pin base steel sheet is embedded at the top of the inner membrane pin base core, and the end part of the piston pin base steel sheet is respectively matched with a steel sheet pin hanging opening which is correspondingly arranged at the side edge of the top of the inner membrane pin base core in a clamping manner.
Furthermore, the two side faces of the vertical part of the inner die center core are longitudinally and symmetrically provided with guide keys, the inner side face of the inner die edge core is longitudinally provided with guide key grooves, and the guide keys are longitudinally connected with the corresponding guide key grooves in a sliding fit manner.
Furthermore, round holes are symmetrically formed in the end portions of the top surface of the center core connecting block respectively, a compression spring is axially sleeved in the round holes, and the first locking bolt axially penetrates through the compression spring.
The invention has the beneficial effects that:
the aluminum piston mold adopts a one-mold double-cavity design, and a pair of molds can form two aluminum piston blanks at one time, so that the aluminum piston mold can better adapt to the operating efficiency of an automatic casting machine, effectively reduces the manufacturing process of the aluminum piston blanks and improves the production efficiency of castings;
the pouring gate of the casting system of the aluminum piston mold is novel in design, two aluminum piston blank cavities share one aluminum liquid pouring cup with a semi-open structure, aluminum liquid flows downwards through a straight pouring gate, passes through a filter screen and then is divided and divided to the aluminum piston blank cavities at two sides through a cross pouring gate, and then two aluminum piston blanks can be cast at one time; the aluminum liquid temperature goes in through the sprue and the cross gate, the loss of the aluminum temperature is small, and meanwhile, the filter screen plays dual roles of blocking slag and buffering in the aluminum liquid casting process, so that the yield of the casting is ensured, the product quality is greatly improved compared with the qualification rate of the finished product of a common die, the metallographic structure of the product is detected in three levels, the macroscopic detection is performed in two levels, and the enterprise benefit is improved.
Drawings
FIG. 1 shows an assembled top view of an aluminum piston mold body of the present invention;
FIG. 2 shows a bottom assembled view of the aluminum piston mold body of the present invention;
FIG. 3 is a schematic perspective view of the right half outer mold according to the present invention;
FIG. 4 is a schematic perspective view of the left half outer mold of the present invention;
FIG. 5 is a schematic diagram illustrating an exploded structure of the inner mold of the piston according to the present invention;
FIG. 6 is a schematic view showing an assembly structure of the inner piston mold according to the present invention;
FIG. 7 shows a schematic of the construction of the screen of the present invention;
FIG. 8 is a schematic view showing the construction of the insulating riser sleeve of the present invention;
FIG. 9 shows a schematic view of the piston stop collar of the present invention;
FIG. 10 is a schematic structural view of the steel plates of the piston pin boss in the invention;
FIG. 11 shows a schematic of the construction of a piston pin boss core block of the present invention;
FIG. 12 shows a top view of an aluminum piston blank of the present invention;
figure 13 shows a bottom view of an aluminum piston blank of the present invention.
Shown in the figure: 1. a right half outer mold; 11. an aluminum liquid pouring cup; 111. a sprue; 112. hanging nails; 113. filtering with a screen; 12. a positioning pin hole; 13. a feeding chamber; 131. filling the hole; 2. a left half outer mold; 21. a gate stopper; 211. a cross gate; 22. a die assembly positioning pin; 23. a positioning key; 3. an upper die; 31. a positioning key groove; 4. a heat-insulating riser sleeve; 5. a heat insulation cap pressing plate; 6. a circulating water cooling pipe joint body; 61. an insert cooling channel; 62. a water inlet pipe joint; 63. a water outlet pipe joint; 7. a piston stop collar; 71. a spigot sleeve positioning pin; 8. a piston inner mold; 81. an inner mold core; 811. a guide key; 812. a first locking bolt; 82. an inner mold pin boss core; 821. hanging a steel sheet pin; 83. an inner mold edge core; 831. a guide key groove; 84. a piston pin boss steel sheet; 85. a central core connecting block; 851. a second locking bolt; 852. a circular hole; 853. a compression spring; 9. an aluminum piston blank cavity; 91. a recess chamber; 92. a piston pin boss core block; 10. an aluminum piston blank; 101. a top die riser sawing part; 102. a sprue riser sawing part; 103. and inlaying the steel sheet part.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 to 4, 7 to 9 and 11, an aluminum piston mold having a one-mold double-cavity casting structure, the aluminum piston mold comprising:
the structure comprises a right half outer die 1, wherein a semi-open type aluminum liquid pouring cup 11 is vertically arranged on the top edge of the middle part of one side surface of the right half outer die 1 in an integrated mode, a sprue 111 is longitudinally communicated with the bottom end of the aluminum liquid pouring cup 11, a filter screen 113 is fixedly covered on the lower part of the sprue 111 through a hanging nail 112, and the outer surface of the filter screen 113 is flush with the side surface corresponding to the right half outer die 1;
the middle top edge of one side surface of the left half outer die 2 is integrally and vertically provided with a gate stop block 21, the side surface of the left half outer die 2 is transversely provided with a cross gate 211, and the cross gate 211 is positioned under the gate stop block 21; after the left half outer mold 2 and the right half outer mold 1 are in butt joint and matched, the sprue stop block 21 is in close fit with the aluminum liquid sprue cup 11, and the bottom end of the sprue 111 is communicated with the middle of the cross gate 211 in an intersecting manner; the end parts of the butt joint surfaces of the left half outer die 2 and the right half outer die 1 are respectively vertically and symmetrically provided with aluminum piston blank cavities 9 in a penetrating manner, and the end parts of the cross runners 211 are respectively communicated with the corresponding aluminum piston blank cavities 9; a groove cavity 91 is radially and symmetrically formed in each aluminum piston blank die cavity 9, a piston pin seat core block 92 is inserted and matched in each groove cavity 91, and the outer end of each piston pin seat core block 92 is communicated and butted with a circulating water cooling pipe joint body 6;
the top opening of each aluminum piston blank cavity 9 is axially and hermetically clamped and matched with the upper die 3, the top surface of the upper die 3 is vertically communicated with a heat-insulation riser sleeve 4, the top surface of the heat-insulation riser sleeve 4 is axially pressed with a heat-insulation riser pressing plate 5, and the end part of the heat-insulation riser pressing plate 5 is fixedly connected with the top surface of the upper die 3 through bolts;
the bottom opening of each aluminum piston blank cavity 9 is axially communicated, spliced and matched with the piston stop sleeve 7, and the bottom surface of the piston stop sleeve 7 is axially inserted with a piston inner die 8.
By adopting the technical scheme, the aluminum piston mold adopts a one-mold double-cavity design, and a pair of molds form two aluminum piston blanks 10 at one time, so that the operation efficiency of an automatic casting machine can be better adapted, the manufacturing process of the aluminum piston blanks 10 is effectively reduced, and the production efficiency of castings is improved;
the pouring gate of the casting system of the aluminum piston mold is novel in design, two aluminum piston blank cavities 9 share one aluminum liquid pouring cup 11 with a semi-open structure, aluminum liquid flows downwards through a straight pouring gate 111 and passes through a filter screen 113, and then is divided and split to the aluminum piston blank cavities 9 at two sides through a cross pouring gate 211, so that two aluminum piston blanks 10 can be cast at one time; the aluminum liquid temperature is directly entered through the sprue 111 and the cross gate 211, the loss of the aluminum temperature is small, and meanwhile, the filter screen 113 plays the dual roles of blocking slag and buffering in the aluminum liquid casting process, so that the yield of the casting is ensured, the product quality is greatly improved compared with the qualification rate of the finished product of a common die, the metallographic structure of the product is detected in three levels, the macroscopic detection is performed in two levels, and the enterprise benefit is improved.
As shown in fig. 3 and 4, positioning pin holes 12 are symmetrically formed in the end portion of the butt joint surface of the right half outer die 1, the end portion of the butt joint surface of the left half outer die 2 is vertically and symmetrically connected with mold closing positioning pins 22, and the mold closing positioning pins 22 are in insertion fit with the corresponding positioning pin holes 12.
By adopting the technical scheme, the die assembly positioning of the left half outer die 2 and the right half outer die 1 ensures that the alignment is not staggered through the two die assembly positioning pins 22 on the left half outer die 2.
As shown in fig. 1 and 2, the circulating water cooling pipe joint body 6 comprises an insert cooling channel 61, one end of the insert cooling channel 61 is in communication and butt joint with the outer end of the piston pin seat core block 92, the other end of the insert cooling channel 61 is in communication and butt joint with an water inlet pipe joint 62 in the axial direction, and an upper side of the outer end part of the insert cooling channel 61 is in communication and butt joint with a water outlet pipe joint 63.
By adopting the technical scheme, the groove-containing cavities 91 are radially and symmetrically formed in each aluminum piston blank cavity 9, the piston pin seat core block 92 is inserted and matched in each groove-containing cavity 91, the piston pin seat core block 92 can also be called as an insert and is respectively fixed on the outer die by 8M 8 hexagon socket head cap screws, and meanwhile, the circulating water cooling pipe joint body 6 arranged at the outer end of the insert can rapidly cool and solidify the pin hole seat position on the outer peripheral wall of the aluminum piston blank 10.
As shown in fig. 1 and 4, positioning keys 23 are respectively installed on the edges of the top openings of the aluminum piston blank cavities 9 in the left half outer die 2, the side edges of the upper die 3 facing the left half outer die 2 are provided with positioning key grooves 31, and the positioning keys 23 are in clamping fit with the corresponding positioning key grooves 31.
By adopting the technical scheme, the arranged positioning key 23 can ensure that the upper die 3 and the aluminum piston blank cavity 9 are quickly positioned and clamped.
As shown in fig. 9, a spigot positioning pin 71 is arranged on the top surface of the piston spigot 7, and the spigot positioning pin 71 is in snap fit with a pin hole formed on the bottom surface of the right half outer die 1.
By adopting the technical scheme, the piston spigot sleeve 7 arranged at the lower end of the aluminum piston die is designed to be in a curved surface shape, the shape of the piston spigot sleeve is consistent with that of an aluminum piston blank 10, and the spigot sleeve positioning pin 71 and the bottom of the right half outer die 1 are positioned in an angular direction to control the direction dislocation; the inner hole of the piston spigot sleeve 7 is a cylindrical through hole, the cylindrical through hole is in clearance sliding fit with the outer cylinder after the piston inner mold 8 is folded, and the core of the piston inner mold 8 is positioned by the piston spigot sleeve 7 after being folded and moves up and down in a reciprocating mode.
As shown in fig. 3 and 4, feeding chambers 13 with directional structures are symmetrically formed in the middle of the butt joint surfaces of the right half outer mold 1 and the left half outer mold 2, one side of each feeding chamber 13 is communicated with the end corresponding to the runner 211, and the other side of each feeding chamber is communicated with the corresponding aluminum piston blank cavity 9; a plurality of filling holes 131 arranged in a lattice shape are formed inwards in the inner bottom surface of the feeding cavity 13, and aluminum silicate fiber heat-insulating materials are filled in the filling holes 131.
By adopting the technical scheme, in order to prevent casting defects from being generated in the solidification process of the aluminum liquid, feeding is required, and the feeding head process principle needs to be post-cooling, which is a prerequisite; in order to ensure the fluidity of the aluminum liquid and the basic condition of no cold shut during casting, a plurality of filling holes 131 filled with aluminum silicate fiber heat insulating materials are formed in the feeding chambers 13 of the right half outer die 1 and the left half outer die 2, so that the feeding head process for casting the aluminum piston blank 10 is the final solidification.
As shown in fig. 3 and 4, the inner bottom surface of the cross runner 211 is flush with the inner bottom surface of the feeding chamber 13, and the inner bottom surface of the runner port of the feeding chamber 13 communicated with the aluminum piston blank cavity 9 is higher than the inner bottom surface of the cross runner 211.
By adopting the technical scheme, the aluminum liquid can flow in the cross gate 211 conveniently, and the gate riser sawing part 102 of the later-stage aluminum piston blank 10 can be reduced.
As shown in fig. 5 and 6, the piston inner mold 8 includes an inner mold center core 81, the inner mold center core 81 is in an inverted T-shaped structure, an inner mold pin boss core 82 and an inner mold edge core 83 are respectively fitted and fitted on the outer surface of the vertical portion of the inner mold center core 81 in a radially symmetrical manner, and the end portion of the inner surface adjacent to the inner mold pin boss core 82 is fitted and fitted with the side surface of the inner mold edge core 83; the horizontal part of the inner mold center core 81 is fixedly screwed with the corresponding inner mold edge core 83 through a first locking bolt 812; the bottom surface of the horizontal part of the inner die center core 81 is longitudinally and fixedly butted with a center core connecting block 85 through at least more than two second locking bolts 851; the top of the inner mould pin base core 82 is embedded with a piston pin base steel sheet 84, and the end parts of the piston pin base steel sheet 84 are respectively in fixed clamping fit with a steel sheet pin hanging opening 821 correspondingly formed in the side edge of the top of the inner mould pin base core 82.
By adopting the technical scheme, the inner cavity of the aluminum piston blank 10 is of a bottleneck type with a large inside and a small outside, so that the core pulling of the piston inner mold 8 of the aluminum piston mold can be realized only by using five core sheets, and after the whole core blank of the piston inner mold 8 is manufactured, the core is cut into the five core sheets by using wires, and then the core blank is combined and bundled into a whole core for processing center engraving and milling.
When the die is closed, the inner die pin seat core 82 and the inner die side core 83 are driven by four side dies respectively, and then the inner die center core 81 is inserted in place; when the mold is opened, the inner mold center core 81 is firstly drawn out, then the two inner mold pin base cores 82 are drawn in towards the middle (the volume is reduced) and then drawn out, the two inner mold side cores 83 are drawn towards the middle, and finally the cores are drawn downwards under the driving of an oil cylinder; after the piston pin seat steel sheet 84 is closed in the mold, the piston pin seat steel sheet 84 on the manipulator is fixedly clamped and matched with the two steel sheet pin hanging openings 821 on the single side of the inner mold pin seat core 82.
As shown in fig. 5, guide keys 811 are longitudinally symmetrically arranged on two side faces of the vertical portion of the inner mold center core 81, a guide key slot 831 is longitudinally formed on the inner side face of the inner mold edge core 83, and the guide keys 811 are longitudinally connected with the corresponding guide key slots 831 in a sliding fit manner.
By adopting the technical scheme, the two sides of the inner die center core 81 are provided with the guide keys 811 which are matched in a sliding manner, so that the five-piece core of the piston inner die 8 can be ensured not to be dislocated when the core is closed or pulled.
As shown in fig. 5, circular holes 852 are symmetrically formed in the top end portions of the center connection blocks 85, compression springs 853 are axially and inwardly sleeved in the circular holes 852, and the first locking bolts 812 axially penetrate through the compression springs 853.
By adopting the technical scheme, the arranged compression spring 853 can play a certain role in shock absorption.
When the casting method is implemented, the right half outer die 1 of the aluminum piston die is a static die and is fixed on a platform and a shoulder surface of a casting machine; the left half outer die 2 is a movable die and is connected to a piston rod of a sliding table oil cylinder of a casting machine and a rotary pull rod through 4 bolts (4M 16 on a single surface) on two surfaces of the outer die to carry out die assembly or die opening; two upper dies 3 are arranged on the aluminum piston die main body to complete top die closing and die drawing of the die; the upper die 3 is provided with a heat-insulating riser sleeve 4 which is fixed by a heat-insulating riser pressing plate 5 and is responsible for feeding aluminum liquid in two aluminum piston blank cavities 9 in the solidification process, pin hole seats of the aluminum piston blanks 10 are set to be rapidly solidified, and two sides of the right half outer die 1 and the left half outer die 2 are respectively provided with a circulating water cooling pipe joint body 6. The piston spigot sleeve 7 is arranged below the die, connected in a rotary groove type manner, fixed on the working table surface of the casting machine, and connected to an oil cylinder piston rod below the casting machine through the piston inner die 8, so that the five-piece core of the piston inner die 8 is subjected to die assembly or core pulling operation, and the forming of the aluminum piston blank 10 is completed.
Two hydraulic drive multi-oil cylinders are matched to open the die and loose the core on the automatic aluminum piston casting machine, (the piston inner die 8 is five-piece core step-by-step extraction) an aluminum piston die mounting interface is arranged on the working table surfaces of the two casting machines, a flange is matched with the casting machine and is mounted and matched with a conversion pull rod screw through an oil cylinder connecting rod, the working table sliding table is driven by a hydraulic cylinder, the working table is inclined by 45 degrees during casting to perform aluminum casting, the impact of filling aluminum liquid into a cavity and the inward rolling of gas are reduced, the forming rate of a casting is ensured, and the whole casting machine, a rotary working table and a robot are matched and controlled by PLC in a linkage way;
the inner side of the pin hole seat of the aluminum piston blank 10 is provided with a steel plate inlaid portion 103 to enhance the tensile strength and the fatigue resistance of the pin hole seat of the engine in the reciprocating working process, and meanwhile, the middle positions of the feed port of the aluminum piston blank 10, the unilateral riser and the casting forming valve pit of the piston top surface are provided with an upper die 3 core-pulling heat-insulating riser sleeve 4 of the aluminum piston die to form a top die riser sawing portion 101.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An aluminum piston mold having a mold double-cavity casting structure, comprising:
the aluminum liquid pouring device comprises a right half outer mold (1), wherein a semi-open type aluminum liquid pouring cup (11) is vertically arranged on the top edge of the middle part of one side surface of the right half outer mold (1) in an integrated mode, a sprue (111) is longitudinally communicated with the bottom end of the aluminum liquid pouring cup (11), a filter screen (113) is fixedly covered on the lower portion of the sprue (111) through a hanging nail (112), and the outer surface of the filter screen (113) is flush with the side surface corresponding to the right half outer mold (1);
the mold comprises a left half outer mold (2), wherein a sprue stop block (21) is integrally and vertically arranged on the top edge of the middle part of one side surface of the left half outer mold (2), a cross gate (211) is transversely arranged on the side surface of the left half outer mold (2), and the cross gate (211) is positioned under the sprue stop block (21); after the left half outer die (2) and the right half outer die (1) are in butt joint and matched, the sprue stop block (21) is in close fit with the molten aluminum sprue cup (11), and the bottom end of the sprue (111) is communicated with the middle of the cross gate (211) in an intersecting manner; the end parts of the butt joint surfaces of the left half outer die (2) and the right half outer die (1) are respectively vertically and symmetrically provided with aluminum piston blank cavities (9) in a penetrating manner, and the end parts of the cross runners (211) are respectively communicated with the corresponding aluminum piston blank cavities (9); a groove cavity (91) is radially and symmetrically formed in each aluminum piston blank cavity (9), a piston pin seat core block (92) is inserted and matched in each groove cavity (91), and the outer end of each piston pin seat core block (92) is communicated and butted with a circulating water cooling pipe joint body (6);
the top opening of each aluminum piston blank cavity (9) is axially and hermetically clamped and matched with the upper die (3), the top surface of the upper die (3) is vertically communicated with a heat-insulation riser sleeve (4), the top surface of the heat-insulation riser sleeve (4) is axially pressed with a heat-insulation riser pressing plate (5), and the end part of the heat-insulation riser pressing plate (5) is fixedly connected with the top surface of the upper die (3) through a bolt;
the bottom opening of each aluminum piston blank cavity (9) is axially communicated and matched with the piston stop sleeve (7) in an inserting mode, and the bottom surface of the piston stop sleeve (7) is axially inserted with a piston inner die (8).
2. The aluminum piston mold having a one-mold double-cavity casting structure as claimed in claim 1, wherein: positioning pin holes (12) are symmetrically formed in the end portion of the butt joint face of the right half outer die (1) inwards respectively, die closing positioning pins (22) are vertically and symmetrically connected to the end portion of the butt joint face of the left half outer die (2) respectively, and the die closing positioning pins (22) are in plug-in fit with the corresponding positioning pin holes (12).
3. The aluminum piston mold having a one-mold double-cavity casting structure as claimed in claim 1, wherein: the circulating water cooling pipe joint body (6) comprises an insert cooling channel (61), one end of the insert cooling channel (61) is communicated and butted with the outer end of the piston pin seat core block (92), the other end of the insert cooling channel is communicated and butted with a water inlet pipe joint (62) in the axial direction, and a water outlet pipe joint (63) is communicated and butted above the side face of the outer end part of the insert cooling channel (61).
4. The aluminum piston mold having a one-mold double-cavity casting structure as claimed in claim 1, wherein: positioning key (23) are installed respectively to aluminium piston blank die cavity (9) apical opening border in left side ha fu external mold (2), go up mould (3) orientation positioning keyway (31) have been seted up to the side edge of left side ha fu external mold (2), positioning key (23) and corresponding positioning keyway (31) joint cooperation.
5. The aluminum piston mold having a one-mold double-cavity casting structure as claimed in claim 1, wherein: the top surface of the piston spigot sleeve (7) is provided with a spigot sleeve positioning pin (71), and the spigot sleeve positioning pin (71) is in clamping fit with a pin hole formed in the bottom surface of the right half outer die (1).
6. The aluminum piston mold having a one-mold double-cavity casting structure as claimed in claim 3, wherein: the middle parts of the butt joint surfaces of the right half outer die (1) and the left half outer die (2) are respectively symmetrically provided with feeding chambers (13) with directional structures, one side of each feeding chamber (13) is communicated with the end part corresponding to the cross runner (211), and the other side of each feeding chamber is communicated with the corresponding aluminum piston blank cavity (9); a plurality of filling holes (131) arranged in a lattice shape are formed in the inner bottom surface of the feeding cavity (13), and aluminum silicate fiber heat-insulating materials are filled in the filling holes (131).
7. The aluminum piston mold having a one-mold double-cavity casting structure as claimed in claim 6, wherein: the inner bottom surface of the cross gate (211) is flush with the inner bottom surface of the feeding cavity (13), and the inner bottom surface of a sprue channel communicated with the feeding cavity (13) and the aluminum piston blank cavity (9) is higher than the inner bottom surface of the cross gate (211).
8. The aluminum piston mold having a one-mold double-cavity casting structure as claimed in claim 6, wherein: the piston inner die (8) comprises an inner die center core (81), the inner die center core (81) is of an inverted T-shaped structure, an inner die pin seat core (82) and an inner die edge core (83) are respectively and symmetrically fitted on the outer surface of the vertical part of the inner die center core (81) in a radial and sticking manner, and the end part of the inner surface of the inner die pin seat core (82) adjacent to the inner die pin seat core is fitted with the side surface of the inner die edge core (83) in a sticking manner; the horizontal part of the inner mold center core (81) is fixedly screwed with the corresponding inner mold edge core (83) through a first locking bolt (812) respectively; the bottom surface of the horizontal part of the inner die center core (81) is longitudinally and fixedly butted with a center core connecting block (85) through at least two second locking bolts (851); the top of interior mould round pin seat core (82) is inlayed and is equipped with piston round pin seat steel sheet (84), the tip of piston round pin seat steel sheet (84) respectively with correspond set up in the fixed joint cooperation of steel sheet pin hanging mouth (821) of interior mould round pin seat core (82) top side.
9. The aluminum piston mold with one-mold double-cavity casting structure as recited in claim 8, wherein: the inner die edge core is characterized in that guide keys (811) are longitudinally and symmetrically arranged on two side faces of a vertical portion of the inner die center core (81), a guide key groove (831) is longitudinally formed in the inner side face of the inner die edge core (83), and the guide keys (811) are longitudinally connected with the guide key grooves (831) in a sliding fit mode.
10. The aluminum piston mold having a one-mold double-cavity casting structure as claimed in claim 8, wherein: round holes (852) are symmetrically formed in the end portion of the top face of the middle core connecting block (85), a compression spring (853) is axially and internally sleeved in each round hole (852), and the first locking bolt (812) axially penetrates through the compression spring (853).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210502289.1A CN114799067B (en) | 2022-05-09 | 2022-05-09 | Aluminum piston mold with one-mold double-cavity casting structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210502289.1A CN114799067B (en) | 2022-05-09 | 2022-05-09 | Aluminum piston mold with one-mold double-cavity casting structure |
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| CN114799067B CN114799067B (en) | 2023-10-03 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005131682A (en) * | 2003-10-31 | 2005-05-26 | Showa Corp | Metallic mold for casting and metallic mold casting method |
| CN203599476U (en) * | 2013-10-23 | 2014-05-21 | 徐水县兴华铸造有限公司 | Metal mold and metal mold casting device |
| CN111318649A (en) * | 2020-04-15 | 2020-06-23 | 广西玉柴机器配件制造有限公司 | Iron mold sand-lined process space crossing type pouring system |
| CN212577440U (en) * | 2020-01-17 | 2021-02-23 | 瑞安市华铸机械有限公司 | Gate valve shell forming die |
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2022
- 2022-05-09 CN CN202210502289.1A patent/CN114799067B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005131682A (en) * | 2003-10-31 | 2005-05-26 | Showa Corp | Metallic mold for casting and metallic mold casting method |
| CN203599476U (en) * | 2013-10-23 | 2014-05-21 | 徐水县兴华铸造有限公司 | Metal mold and metal mold casting device |
| CN212577440U (en) * | 2020-01-17 | 2021-02-23 | 瑞安市华铸机械有限公司 | Gate valve shell forming die |
| CN111318649A (en) * | 2020-04-15 | 2020-06-23 | 广西玉柴机器配件制造有限公司 | Iron mold sand-lined process space crossing type pouring system |
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| CN114799067B (en) | 2023-10-03 |
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