CN112916734A - Integral forming die and forming method for inner ring of flame tube of gas turbine - Google Patents
Integral forming die and forming method for inner ring of flame tube of gas turbine Download PDFInfo
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- CN112916734A CN112916734A CN202110099982.4A CN202110099982A CN112916734A CN 112916734 A CN112916734 A CN 112916734A CN 202110099982 A CN202110099982 A CN 202110099982A CN 112916734 A CN112916734 A CN 112916734A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
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Abstract
The die comprises a cold-punching die four-guide-post die frame, a cone, a guide plate, a top plate, an expansion valve, a fixing plate, a wedge block, a lower female die, an upper female die, a female die insert, a reset bolt and a discharging ring, and the quality and the size precision of the molded surface of the inner ring of the flame tube of the gas turbine are ensured by an integral forming method, the manual shape correction workload is reduced, and the working efficiency is greatly improved.
Description
Technical Field
The invention belongs to the field of machining, and particularly relates to an integral forming die and a forming method for an inner ring of a flame tube of a gas turbine.
Background
The structure of the inner ring of the flame tube of a certain type of combustion engine is shown in figures 12 and 13. The formed inner ring 1 of the flame tube is a thin-wall conical tube, the lower end of the inner ring 1 of the flame tube is provided with triangular skirt edges 1002 which are uniformly distributed at 180 positions along the circumferential direction, and the middle part of the conical surface of the inner ring 1 of the flame tube is provided with an R-shaped arc rib 1001 which is inwards concave along the circumference.
The inner ring assembly of the flame tube of the gas turbine is formed by lapping and vacuum brazing 10 sections of inner rings of the structure, the fit clearance of the vacuum brazing part is small, and in order to improve the effect of wetting a base metal by brazing filler metal and ensure the welding connection quality, the size tolerance of a single inner ring is 0.9mm, the tolerance grade IT12 is equivalent to the tolerance of machining, so that the forming size precision is high, the structure is complex, and the forming difficulty is high. Generally, the forming process is to weld a conical cylinder in a rounding mode, then circular arc ribs 1001 are rolled on a three-axis rolling machine through rollers, and a rib pressing die segmented pressing skirt edge 1002 is designed. 180 triangle-shaped shirt rims 1002 group presses, and the shirt rim is along week distribution uniformity poor, and intensity of labour is big, and processing time is long, and the front and back end diameter tolerance 0.9mm is difficult to control, and poor stability is difficult to operate. Therefore, it is desirable to provide an integral forming mold and a forming method, which can ensure the quality and the dimensional accuracy of the molded surface and reduce the workload of manual shape correction.
Disclosure of Invention
In order to solve the technical problem, the invention provides an integral forming die and a forming method for an inner ring of a flame tube of a gas turbine.
The invention is realized by the following technical scheme.
The invention provides an integral forming die for an inner ring of a flame tube of a gas turbine, which comprises a cold-punching die four-guide-post die frame, a cone, a guide plate, a top plate, an expansion flap, a fixing plate, a wedge block, a lower female die, an upper female die, a female die insert, a reset bolt and a discharging ring, wherein the cold-punching die is provided with a guide post and a guide post;
the four-guide-post die set of the cold-punching die is a standard die set and consists of a lower die plate, an upper die plate, 4 guide posts and guide sleeves, and a mandril through hole and a cone installation central hole which correspond to the mandril hole of the hydraulic press are arranged on the lower die plate;
the cone comprises a cylindrical section and a cone block, the cylindrical section is a cylindrical part with a central hole, the lower surface of the cylindrical section is provided with a boss with a central hole, the central hole of the boss is concentric with the central hole of the cylindrical section 31, the diameter of the boss is smaller than that of the cylindrical section, and the boss is arranged in the central hole of the lower template and connected with the lower template; the conical block is provided with a plurality of conical blocks, each conical block is a pyramid which is provided with a central hole and is uniformly distributed along the peripheral inclined plane, the lower surface of each conical block is connected with the upper surface of the cylindrical section, the central hole of each conical block is penetrated through the central hole of the cylindrical section, and a rectangular groove is arranged on the inclined conical surface of each conical block;
the guide plate is a cuboid with a T-shaped section and is arranged in the rectangular groove;
the top plate is a disc-shaped part with a central hole and concentric with the cone, the top plate is positioned on the upper surface of a top rod hole of the lower template hydraulic machine, the inner surface of the central hole of the top plate is positioned on the outer side of the cylindrical section, and the top plate can slide up and down along the cylindrical section;
the expansion valve is a plurality of fan-shaped bodies uniformly distributed along the periphery, the inclined plane of the inner surface of each fan-shaped body is attached to the inclined plane of each cone, the inclined plane of the inner surface of each expansion valve is provided with a rectangular groove perpendicular to the inclined plane, the width of each rectangular groove is the same as that of each guide plate, the upper end face of each guide plate is positioned in the corresponding rectangular groove, each expansion valve can slide on the inclined plane of each cone block along each guide plate, the shape and the size of the outer surface of each expansion valve are the same as those of the inner surface of the inner ring of the flame tube, the lower surface of each expansion valve is positioned above the upper surface of;
the fixed seat is a circular ring body with a central hole and concentric with the top plate, the inner surface of the central hole of the fixed seat is positioned on the outer side of the outer cylindrical surface of the top plate, a plurality of wedge-shaped block fixing grooves are formed in the circular ring of the fixed seat, a plurality of wedge-shaped blocks are installed in the wedge-shaped block fixing grooves of the fixed seat, the inclined surfaces of the wedge-shaped blocks are positioned on the inner side of the center of the die, and the fixed seat is arranged on the;
the lower concave die is an annular body, the inner surface of the lower concave die is positioned at the lower part of the outer side of the inner ring of the flame tube and is consistent with the outer surface of the inner ring of the flame tube, a lower avoidance groove is arranged on the annular surface of the lower concave die, and the position of the lower avoidance groove is consistent with the assembling position of the wedge block;
the upper concave die is an annular body, the inner surface of the annular body is positioned on the upper outer side surface of the inner ring of the flame tube and is consistent with the outer surface of the inner ring of the flame tube, the annular surface of the upper concave die is provided with a plurality of upper avoidance grooves of wedge blocks, the positions of the upper avoidance grooves are consistent with the positions of the lower concave die, two sides of each avoidance groove are provided with reset bolt holes, the lower surface of the upper concave die is provided with a sliding concave die groove which is concentric with the annular body of the upper concave die, an R-shaped arc rib which is concave inwards in the inner ring of the flame tube is positioned in the sliding concave die groove, the upper surface of the lower concave die is fixed on the lower surface of the upper concave;
the die insert is a plurality of sectors uniformly distributed along the periphery, the distance between the included angle line of two side surfaces of the sectors and the center is a, wherein the value range of a is 1-10, the die insert is arranged in a sliding die groove and can be kept to slide horizontally in the sliding die groove, the inclined plane of the outer surface of the sector of the die insert is attached to the inclined plane of a wedge block, the upper die is provided with a reset bolt hole, a reset bolt penetrates through the reset bolt hole of the upper die and is screwed into the inclined plane of the outer surface of the die insert, a reset spring is arranged between the bolt head of the reset bolt and the outer ring surface of the die insert, the inner surface of the sector of the die insert is consistent with the outer surface of the R-shaped arc rib part of the inner ring of the flame tube, and in the working state, the inner molded surfaces; the discharging ring is a ring part, is positioned on the inner side of the upper female die and is connected with the upper die plate through screws.
Furthermore, the number of the conical blocks is n, wherein n is more than or equal to 4 and less than or equal to 20.
Furthermore, the distance between the included angle of the two side surfaces of the sector of the expansion valve and the center is a, wherein a is more than or equal to 50 and is more than or equal to 1.
Furthermore, the central included angle of the expansion flaps is 360 degrees/n, wherein n is the number of the expansion flaps, and the value range of n is more than or equal to 4 and less than or equal to 20.
Further, the wedge-shaped block is arranged in the wedge-shaped block fixing groove 71 of the fixing seat 7 through H7/n 6.
Further, the number of the wedge-shaped blocks is 4-20.
Furthermore, the central included angle of the die insert is 360 degrees/n, wherein n is the number of the arranged expansion flaps, and the value range of n is more than or equal to 4 and less than or equal to 20.
Further, the number of the wedge-shaped blocks is n, wherein the value range of n is more than or equal to 4 and less than or equal to 20.
Furthermore, the discharge ring is provided with a spring at the joint of the screw and the upper template, and the spring is arranged in a spring hole arranged on the lower surface of the screw hole of the upper template.
A forming method using an integral forming die for a flame tube inner ring of a combustion engine comprises the following steps:
s1, blanking:
adopting a fan-shaped material below a high-temperature alloy plate, welding a conical-cylinder-shaped blank part with the same taper as that of the inner ring, calculating the diameter of the conical-cylinder-shaped blank part by using the elongation of the material, wherein the height of the conical-cylinder-shaped blank part is the same as that of the expansion valve;
s2, molding:
s21, forming on a hydraulic press, fixing an upper template on an upper platform of the hydraulic press, and fixing a lower template on a lower platform of the hydraulic press;
s22, starting the hydraulic press, opening the upper template and the lower template, enabling the upper template to move upwards, enabling the outer inclined surface of the die insert to be separated from the inclined surface of the wedge block, and enabling the die insert to horizontally move outwards until the die insert, the lower die and the upper die form a die profile;
s23, starting the ejector rod of the hydraulic press to move upwards, enabling the top plate to move upwards under the pushing of the ejector rod of the hydraulic press, and enabling the expansion valve to contract inwards while sliding upwards along the inclined conical surface formed by the plurality of conical blocks along the guide plate under the pushing of the top plate;
s24, placing the blank part outside the expanding valve, enabling the lower end face of the blank part to fall on a top plate, enabling an upper die plate to drive a female die consisting of a lower female die, an upper female die and a female die insert to move downwards, enabling a discharging ring, the blank part to be in contact with the upper surface of the expanding valve after the lower end face of the lower female die is in contact with the upper surface of the top plate, continuing to move downwards, enabling the expanding valve to expand outwards while sliding downwards along a guide plate on a cone inclined plane under the pushing of the discharging ring, enabling the outer surface inclined plane of the female die insert to be in contact with the wedge-shaped block inclined plane and sliding inwards along the horizontal direction in the downward movement process, and completing part forming when the lower surface of the top plate is attached to the upper surface;
and S25, repeating the step S22 and the step S23, and taking out the molded part.
The invention has the beneficial effects that: the mold for integrally forming the inner ring of the flame tube of a certain gas turbine and the using method thereof are provided, the quality and the size precision of a molded surface are ensured by the integrally forming method, the manual shape correcting workload is reduced, and the working efficiency is greatly improved.
Drawings
FIG. 1 is a schematic diagram of the present invention.
FIG. 2 is a schematic view of the cone structure of the present invention.
Fig. 3 is a top view of fig. 2 of the present invention.
Fig. 4 is a schematic view of the expansion flap of the present invention.
Fig. 5 is a top view of fig. 4 in accordance with the present invention.
Fig. 6 is a schematic view of a fixed block structure according to the present invention.
FIG. 7 is a schematic view of the structure of the lower cavity die of the present invention.
FIG. 8 is a schematic view of the structure of the upper female mold in the present invention.
Fig. 9 is a top view of fig. 8 of the present invention.
Figure 10 is a schematic view of the die insert structure of the present invention.
Fig. 11 is a top view of fig. 10 of the present invention.
FIG. 12 is a schematic view of the inner ring of the flame tube of a combustion engine.
Fig. 13 is a partial view of the bottom view of fig. 12.
In the figure: 1-flame tube inner ring, 1001-R-shaped arc rib, 1002-triangular skirt edge, 2-cold punching die four-guide-post die carrier, 21-lower template, 22-upper template, 3-cone, 31-cylindrical section, 32-cone block, 33-boss, 4-guide plate, 5-top plate, 6-expansion flap, 61-rectangular groove, 7-fixing plate, 71-wedge block fixing groove, 8-wedge block, 9-lower concave die, 91-lower avoidance groove, 10-upper concave die, 101-upper avoidance groove, 102-sliding concave die groove, 103-reset bolt hole, 11-concave die insert, 12-reset bolt and 13-unloading ring.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
As shown in fig. 1-11, an integral forming die for an inner ring of a flame tube of a gas turbine comprises a cold-punching die, a four-guide-post die carrier 2, a cone 3, a guide plate 4, a top plate 5, an expansion flap 6, a fixed plate 7, a wedge block 8, a lower female die 9, an upper female die 10, a female die insert 11, a reset bolt 12 and a discharge ring 13;
the four-guide-column die set 2 of the cold-punching die is a standard die set, and the four-guide-column die set 2 of the cold-punching die is composed of a lower die plate 21, an upper die plate 22, and 4 guide columns and guide sleeves. A mandril through hole and a cone installation central hole which correspond to the mandril hole of the hydraulic machine are arranged on the lower template 21;
the cone 3 comprises a cylindrical section 31 and a cone block 32, the cylindrical section 31 is a cylindrical part with a central hole, a boss 33 with a central hole is arranged on the lower surface of the cylindrical section 31, the central hole of the boss 33 is concentric with the central hole of the cylindrical section 31, the diameter of the boss 33 is smaller than that of the cylindrical section 31, and the boss 33 is arranged in the central hole of the lower template 22 and connected with the lower template 21; the number of the conical blocks 32 is multiple, each conical block 32 is a pyramid with a central hole and uniformly distributed along the peripheral inclined plane, the lower surface of the conical block 32 is connected with the upper surface of the cylindrical section 31, the central hole of the conical block 32 is penetrated through the central hole of the cylindrical section 31, and a rectangular groove 35 is arranged on the inclined conical surface of the conical block 32;
the guide plate 4 is a cuboid with a T-shaped section and is arranged in the rectangular groove 35;
the top plate 5 is a disc-shaped part with a central hole and concentric with the cone 3, the top plate 4 is positioned on the upper surface of a mandril hole of the hydraulic press of the lower template 21, the inner surface of the central hole of the top plate 4 is positioned on the outer side of the cylindrical section 31, and the top plate 4 can slide up and down along the cylindrical section 31;
the expansion valve 6 is a plurality of fan-shaped bodies uniformly distributed along the periphery, the inclined plane of the inner surface of each fan-shaped body is attached to the inclined plane of the cone 3, the inclined plane of the inner surface of the expansion valve 6 is provided with a rectangular groove 61 perpendicular to the inclined plane, the width of the rectangular groove 61 is the same as that of the guide plate 4, the upper end face of the guide plate 4 is positioned in the rectangular groove 61, the expansion valve 6 can slide on the inclined plane of the cone block 32 along the guide plate 4, the outer surface of the expansion valve 6 is the same as that of the inner surface of the flame tube inner ring 1 in shape and size, the lower surface of the expansion valve 6 is positioned above the upper surface of the top plate 5, and the lower;
the fixed seat 7 is a circular ring body with a central hole and concentric with the top plate 5, the inner surface of the central hole of the fixed seat 7 is positioned on the outer side of the outer cylindrical surface of the top plate 5, a plurality of wedge-shaped block fixing grooves 71 are formed in the circular ring of the fixed seat 7, a plurality of wedge-shaped blocks 8 are installed in the wedge-shaped block fixing grooves 71 of the fixed seat 7, the inclined surfaces of the wedge-shaped blocks 8 are positioned on the inner side of the center of the die, and the fixed seat 7 is arranged on the upper surface;
the lower female die 9 is an annular body, the inner surface of the lower female die is positioned at the lower part of the outer side of the inner ring 1 of the flame tube and is consistent with the outer surface of the inner ring 1 of the flame tube, a lower avoidance groove 91 is arranged on the annular surface of the lower female die 9, and the position of the lower avoidance groove 91 is consistent with the assembly position of the wedge block 8;
the upper concave die 10 is an annular body, the inner surface of the annular body is positioned on the upper outer side surface of the inner ring 1 of the flame tube and is consistent with the outer surface of the inner ring 1 of the flame tube, the annular surface of the upper concave die 10 is provided with a plurality of upper avoidance grooves 101 of wedge blocks 8, the positions of the upper avoidance grooves 101 are consistent with the positions of the lower concave dies 9, two sides of each avoidance groove are provided with reset bolt holes 103, the lower surface of the upper concave die 10 is provided with a sliding concave die groove 102 which is concentric with the annular body of the upper concave die 10, an R-shaped arc rib 11 which is concave inwards in the inner ring 1 of the flame tube is positioned in the sliding concave die groove 102, the upper surface of the lower concave die 9 is fixed on the lower surface of the upper concave die;
the die insert 11 is a plurality of sectors uniformly distributed along the periphery, the included angle distance between two side surfaces of the sectors and the center is a, wherein the value range of a is 1-10, the die insert 11 is arranged in a sliding die groove 102 and can be kept to slide horizontally in the sliding die groove 102, the inclined plane of the outer surface of the sector of the die insert 11 is attached to the inclined plane of the wedge block 8, a reset bolt 12 penetrates through a reset bolt hole 103 of an upper die 10 and is screwed into the inclined plane of the outer surface of the die insert 11, a reset spring is arranged between a bolt head of the reset bolt 12 and the outer ring surface of the die insert 11, the inner surface of the sector of the die insert 11 is consistent with the outer surface of the R-shaped arc rib 11 part recessed in the flame tube inner ring 1, and in a working state, the inner surfaces of the lower concave die 9, the upper die 10 and the;
the discharging ring 13 is a ring part, is positioned on the inner side of the upper female die 10, and is connected with the upper die plate 22 through screws.
Furthermore, the number of the conical blocks 32 is n, wherein n is more than or equal to 4 and less than or equal to 20.
Furthermore, the distance between the included angle of the two side surfaces of the sector of the expansion valve 6 and the center is a, wherein a is more than or equal to 50 and is more than or equal to 1.
Furthermore, the central included angle of the expansion flaps 6 is 360 degrees/n, wherein n is the number of the expansion flaps 6, and the value range of n is more than or equal to 4 and less than or equal to 20.
Further, the wedge-shaped block 8 is installed in the wedge-shaped block fixing groove 71 of the fixing seat 7 through H7/n 6.
Further, the number of the wedge-shaped blocks 8 is 4-20.
Furthermore, the central included angle of the die insert 11 is 360 °/n, wherein n is the number of the expanding flaps 6, and the value range of n is not less than 4 and not more than 20.
Further, the number of the wedge-shaped blocks 8 is n, wherein the value range of n is more than or equal to 4 and less than or equal to 20.
Further, a spring is arranged at the joint of the discharging circular ring 13 and the upper template 22 through a screw, and the spring is arranged in a spring hole formed in the lower surface of the screw hole of the upper template 22.
A forming method using the integral forming die for the inner ring of the flame tube of the combustion engine comprises the following steps:
s1, blanking:
adopting a fan-shaped material below a high-temperature alloy plate, welding a conical-cylinder-shaped blank part with the same taper as that of the inner ring, calculating the diameter of the conical-cylinder-shaped blank part by using the elongation of the material, wherein the height of the conical-cylinder-shaped blank part is the same as that of the expansion valve 6;
s2, molding:
s21, forming on a 16000KN hydraulic press, fixing the upper template 22 on an upper platform of the hydraulic press, and fixing the lower template 21 on a lower platform of the hydraulic press;
s22, starting a hydraulic press, opening the upper template 22 and the lower template 21, enabling the upper template 22 to move upwards, enabling the outer inclined surface of the die insert 11 to be separated from the inclined surface of the wedge block 8, and enabling the die insert 11 to horizontally move outwards until the die insert 11, the lower die 9 and the upper die 10 form a die molded surface;
s23, starting the ejector rod of the hydraulic press to move upwards, pushing the top plate 5 to move upwards under the push of the ejector rod of the hydraulic press, and at the moment, pushing the expansion flap 6 to slide upwards along the inclined conical surface formed by the plurality of conical blocks 32 along the guide plate 4 under the push of the top plate 5 and to contract inwards;
s24, placing the blank part outside the expanding valve 6, enabling the lower end face of the blank part to fall on the top plate 5, driving a female die consisting of a lower female die 9, an upper female die 10 and a female die insert 11 to move downwards by an upper die plate 21, enabling a discharging ring 13, the blank part to be in contact with the upper surface of the expanding valve 6 after the lower end face of the lower female die 9 is in contact with the upper surface of the top plate 5, continuing to move downwards, enabling the expanding valve 6 to expand outwards while sliding downwards on the inclined plane 32 of the cone 3 along the guide plate 4 under the pushing of the discharging ring 13, enabling the inclined plane of the outer surface of the female die insert 11 to be in contact with the inclined plane of the wedge block 8 and slide inwards in the horizontal direction in the process of moving downwards, and completing part forming when the lower surface of the top plate 5 is in contact with;
and S25, repeating the step S22 and the step S23, and taking out the molded part.
The invention provides a die for integrally forming an inner ring of a flame tube of a gas turbine and a using method thereof.
Claims (10)
1. The utility model provides a whole forming die of internal ring of combustion engine flame tube which characterized in that: the cold-punching die comprises a cold-punching die four-guide-post die frame, a cone, a guide plate, a top plate, an expansion flap, a fixing plate, a wedge-shaped block, a lower female die, an upper female die, a female die insert, a reset bolt and a discharging ring;
the four-guide-column die set of the cold-punching die is a standard die set and consists of a lower template, an upper template, 4 guide columns and guide sleeves. A mandril through hole and a cone installation central hole which correspond to the mandril hole of the hydraulic press are arranged on the lower template;
the cone comprises a cylindrical section and a cone block, the cylindrical section is a cylindrical part with a central hole, the lower surface of the cylindrical section is provided with a boss with a central hole, the central hole of the boss is concentric with the central hole of the cylindrical section, the diameter of the boss is smaller than that of the cylindrical section, and the boss is arranged in the central hole of the lower template and connected with the lower template; the conical block is provided with a plurality of conical blocks, each conical block is a pyramid which is provided with a central hole and is uniformly distributed along the peripheral inclined plane, the lower surface of each conical block is connected with the upper surface of the cylindrical section, the central hole of each conical block is penetrated through the central hole of the cylindrical section, and a rectangular groove is arranged on the inclined conical surface of each conical block;
the guide plate is a cuboid with a T-shaped section and is arranged in the rectangular groove;
the top plate is a disc-shaped part with a central hole and concentric with the cone, the top plate is positioned on the upper surface of a top rod hole of the lower template hydraulic machine, the inner surface of the central hole of the top plate is positioned on the outer side of the cylindrical section, and the top plate can slide up and down along the cylindrical section;
the expansion valve is a plurality of fan-shaped bodies uniformly distributed along the periphery, the inclined plane of the inner surface of each fan-shaped body is attached to the inclined plane of each cone, the inclined plane of the inner surface of each expansion valve is provided with a rectangular groove perpendicular to the inclined plane, the width of each rectangular groove is the same as that of each guide plate, the upper end face of each guide plate is positioned in the corresponding rectangular groove, each expansion valve can slide on the inclined plane of each cone block along each guide plate, the shape and the size of the outer surface of each expansion valve are the same as those of the inner surface of the inner ring of the flame tube, the lower surface of each expansion valve is positioned above the upper surface of;
the fixed seat is a circular ring body with a central hole and concentric with the top plate, the inner surface of the central hole of the fixed seat is positioned on the outer side of the outer cylindrical surface of the top plate, a plurality of wedge-shaped block fixing grooves are formed in the circular ring of the fixed seat, a plurality of wedge-shaped blocks are installed in the wedge-shaped block fixing grooves of the fixed seat, the inclined surfaces of the wedge-shaped blocks are positioned on the inner side of the center of the die, and the fixed seat is arranged on the upper;
the lower concave die is an annular body, the inner surface of the lower concave die is positioned at the lower part of the outer side of the inner ring of the flame tube and is consistent with the outer surface of the inner ring of the flame tube, a lower avoidance groove is arranged on the annular surface of the lower concave die, and the position of the lower avoidance groove is consistent with the assembling position of the wedge block;
the upper concave die is an annular body, the inner surface of the annular body is positioned on the upper outer side surface of the inner ring of the flame tube and is consistent with the outer surface of the inner ring of the flame tube, the annular surface of the upper concave die is provided with a plurality of upper avoidance grooves of wedge blocks, the positions of the upper avoidance grooves are consistent with the positions of the lower concave die, two sides of each avoidance groove are provided with reset bolt holes, the lower surface of the upper concave die is provided with a sliding concave die groove which is concentric with the annular body of the upper concave die, an R-shaped arc rib which is concave inwards in the inner ring of the flame tube is positioned in the sliding concave die groove, the upper surface of the lower concave die is fixed on the lower surface of the upper concave;
the die insert is a plurality of sectors uniformly distributed along the periphery, the distance between the included angle line of two side surfaces of the sectors and the center is a, wherein the value range of a is 1-10, the die insert is arranged in a sliding die groove and can be kept to slide horizontally in the sliding die groove, the inclined plane of the outer surface of the sector of the die insert is attached to the inclined plane of a wedge block, the upper die is provided with a reset bolt hole, a reset bolt penetrates through the reset bolt hole of the upper die and is screwed into the inclined plane of the outer surface of the die insert, a reset spring is arranged between the bolt head of the reset bolt and the outer ring surface of the die insert, the inner surface of the sector of the die insert is consistent with the outer surface of the R-shaped arc rib part of the inner ring of the flame tube, and in the working state, the inner molded surfaces;
the discharging ring is a ring part, is positioned on the inner side of the upper female die and is connected with the upper die plate through screws.
2. A combustion engine liner inner ring integral molding die as claimed in claim 1, wherein: the number of the conical blocks is n, wherein n is more than or equal to 4 and less than or equal to 20.
3. A combustion engine liner inner ring integral molding die as claimed in claim 1, wherein: the distance between the included angle of the two side surfaces of the sector of the expansion valve and the center is a, wherein a is more than or equal to 50 and is more than or equal to 1.
4. A combustion engine liner inner ring integral molding die as claimed in claim 1, wherein: the central included angle of the expansion flaps is 360 degrees/n, wherein n is the number of the expansion flaps, and the value range of n is more than or equal to 4 and less than or equal to 20.
5. A combustion engine liner inner ring integral molding die as claimed in claim 1, wherein: the wedge-shaped block is arranged in the wedge-shaped block fixing groove of the fixing seat through H7/n 6.
6. A combustion engine liner inner ring integral molding die as claimed in claim 1, wherein: the number of the wedge-shaped blocks is 4-20.
7. A combustion engine liner inner ring integral molding die as claimed in claim 1, wherein: the central included angle of the die insert is 360 degrees/n, wherein n is the number of the arranged expansion flaps, and the value range of n is more than or equal to 4 and less than or equal to 20.
8. A combustion engine liner inner ring integral molding die as claimed in claim 1, wherein: the number of the wedge-shaped blocks is n, wherein the value range of n is more than or equal to 4 and less than or equal to 20.
9. A combustion engine liner inner ring integral molding die as claimed in claim 1, wherein: the discharging ring is provided with a spring at the joint of the upper template and the discharging ring through a screw, and the spring is arranged in a spring hole formed in the lower surface of the screw hole of the upper template.
10. A forming method using the integral forming die for the inner ring of the flame tube of the combustion engine as claimed in any one of claims 1 to 9, characterized by comprising the following steps:
s1, blanking:
adopting a fan-shaped material below a high-temperature alloy plate, welding a conical-cylinder-shaped blank part with the same taper as that of the inner ring, calculating the diameter of the conical-cylinder-shaped blank part by using the elongation of the material, wherein the height of the conical-cylinder-shaped blank part is the same as that of the expansion valve;
s2, molding:
s21, forming on a hydraulic press, fixing the upper template 22 on an upper platform of the hydraulic press, and fixing the lower template on a lower platform of the hydraulic press;
s22, starting the hydraulic press, opening the upper template and the lower template, enabling the upper template to move upwards, enabling the outer inclined surface of the die insert to be separated from the inclined surface of the wedge block, and enabling the die insert to horizontally move outwards until the die insert, the lower die and the upper die form a die profile;
s23, starting the ejector rod of the hydraulic press to move upwards, enabling the top plate to move upwards under the pushing of the ejector rod of the hydraulic press, and enabling the expansion valve to contract inwards while sliding upwards along the inclined conical surface formed by the plurality of conical blocks along the guide plate under the pushing of the top plate;
s24, placing the blank part outside the expanding valve, enabling the lower end face of the blank part to fall on a top plate, enabling an upper die plate to drive a female die consisting of a lower female die, an upper female die and a female die insert to move downwards, enabling a discharging ring, the blank part to be in contact with the upper surface of the expanding valve after the lower end face of the lower female die is in contact with the upper surface of the top plate, continuing to move downwards, enabling the expanding valve to expand outwards while sliding downwards along a guide plate on a cone inclined plane under the pushing of the discharging ring, enabling the outer surface inclined plane of the female die insert to be in contact with the wedge-shaped block inclined plane and sliding inwards along the horizontal direction in the downward movement process, and completing part forming when the lower surface of the top plate is attached to the upper surface;
and S25, repeating the step S22 and the step S23, and taking out the molded part.
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| CN202110099982.4A CN112916734A (en) | 2021-01-25 | 2021-01-25 | Integral forming die and forming method for inner ring of flame tube of gas turbine |
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| CN114472709A (en) * | 2021-12-24 | 2022-05-13 | 哈尔滨汽轮机厂有限责任公司 | Peripheral cover cylinder ring expansion type tool |
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