CN114247839B - Composite production method of large-sized cylinder - Google Patents
Composite production method of large-sized cylinder Download PDFInfo
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- CN114247839B CN114247839B CN202111575523.5A CN202111575523A CN114247839B CN 114247839 B CN114247839 B CN 114247839B CN 202111575523 A CN202111575523 A CN 202111575523A CN 114247839 B CN114247839 B CN 114247839B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/04—Shaping in the rough solely by forging or pressing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/10—Piercing billets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K23/00—Making other articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K29/00—Arrangements for heating or cooling during processing
Abstract
The invention relates to a composite production method of a large-sized cylinder, which comprises a cylinder blank and an outer ring auxiliary cylinder, and comprises the following processing steps: selecting a blank, wherein the barrel blank processed by the weight of the blank can meet the requirements of end face machining allowance and inner wall machining allowance, but the outer wall machining allowance of the barrel blank is smaller than the requirement of machining allowance; forging the blank to form a barrel blank; preparing an outer ring auxiliary barrel, wherein the outer diameter of the outer ring auxiliary barrel is matched with the outer diameter of the barrel blank meeting the machining allowance requirement, and the inner diameter of the outer ring auxiliary barrel is larger than the outer diameter of the barrel blank; sleeving the outer ring auxiliary cylinder body on the outer side of the cylinder body blank, and simultaneously forging the outer ring auxiliary cylinder body and the cylinder body blank to form a composite forged cylinder body; and processing the composite forging cylinder according to the machining requirement to form the finished cylinder.
Description
Technical Field
The invention relates to a composite production method of a large-sized cylinder, belonging to the technical field of forging.
Background
The main production procedures of producing the large copper or copper alloy cylinder body by the traditional process comprise: the method comprises the steps of pouring molten copper into an ingot mould with a certain specification to obtain an ingot with a corresponding specification, cutting a riser of the ingot to obtain a blank, freely forging the blank to obtain a barrel blank, and machining the barrel blank to obtain a finished product.
The free forging is a processing method for obtaining a forging piece with a required geometric shape and internal quality by directly applying external force to a blank by using a simple universal tool or between an upper anvil and a lower anvil of forging equipment to deform the blank, a barrel blank obtained after the free forging has low dimensional precision, rough surface, insufficient flatness and insufficient parallelism, and the finished product size can be ensured only by ensuring enough machining allowance if subsequent heat treatment processes such as solid solution, aging and the like which easily cause workpiece deformation, so that the required blank weight of a large copper or copper alloy barrel can reach more than ten tons.
However, the general copper works in China generally have no capability of producing the cast ingots with the weight, so that the cast ingots of the large copper works need to be purchased to produce large cylinders, the price of the large cast ingots is high, and the problem that how to expand the production capability of enterprises by using the cast ingots with the existing specifications and to avoid purchasing the large cast ingots is ubiquitous and urgently needed to be solved in the industry.
Disclosure of Invention
The present invention aims to provide a new technical solution to improve or solve the technical problems in the prior art as described above.
The invention provides a composite production method of a large-sized cylinder, which comprises a cylinder blank and an outer ring auxiliary cylinder, and comprises the following processing steps:
1) Selecting a blank, wherein the barrel blank processed by the weight of the blank can meet the requirements of end face machining allowance and inner wall machining allowance, but the outer wall machining allowance of the barrel blank is smaller than the requirement of machining allowance;
2) Forging the blank selected in the step 1) to form a barrel blank;
3) Preparing an outer ring auxiliary cylinder, wherein the outer diameter of the outer ring auxiliary cylinder is matched with the outer diameter of the cylinder blank which meets the allowance of the machining process requirement, and the inner diameter of the outer ring auxiliary cylinder is larger than the outer diameter of the cylinder blank;
4) Sleeving the outer ring auxiliary cylinder body on the outer side of the cylinder body blank, and simultaneously forging the outer ring auxiliary cylinder body and the cylinder body blank to form a composite forged cylinder body; the inner diameter and the outer diameter of the composite forging cylinder both meet the requirement of machining allowance;
5) And processing the composite forging cylinder according to the machining requirement to form the finished cylinder.
Further, the forging process of the blank in the step 2) comprises heat preservation in a heating furnace, upsetting after discharging, punching, drawing out and reaming.
Further, in the step 4), the outer ring auxiliary cylinder body is sleeved outside the cylinder body blank before broaching after the blank is drawn out, and the outer ring auxiliary cylinder body and the cylinder body blank are simultaneously subjected to broaching forging to form a composite forging cylinder body.
Further, the blank is obtained by cutting a dead head through an ingot.
Further, the drawing process comprises drawing for multiple times, and if the temperature of the blank is reduced to the final forging temperature in the drawing process, the blank is returned to the furnace for heat preservation again and then drawing is carried out again.
The invention also provides a composite production method of the large-scale cylinder, which comprises a cylinder blank and is characterized by also comprising an inner hole auxiliary cylinder, and the processing steps are as follows:
1) Selecting a blank, wherein the barrel blank processed by the weight of the blank can meet the requirements of end face machining allowance and outer wall machining allowance, but the machining allowance of the inner wall of the barrel blank is smaller than the requirement of the machining allowance;
2) Forging the blank selected in the step 1) to form a barrel blank;
3) Preparing an inner hole auxiliary cylinder, wherein the inner diameter of the inner hole auxiliary cylinder is matched with the inner diameter of the cylinder blank which meets the allowance of the machining process requirement, and the outer diameter of the inner hole auxiliary cylinder is smaller than the inner diameter of the cylinder blank;
4) Nesting the inner hole auxiliary cylinder body on the inner side of the cylinder body blank, and simultaneously continuing reaming and forging the inner hole auxiliary cylinder body and the cylinder body blank to form a composite forged cylinder body; the outer diameter of the composite forging cylinder meets the requirement of machining allowance;
5) And processing the composite forging cylinder according to the machining requirement to form the finished cylinder.
Further, the forging process of the blank in the step 2) comprises heat preservation in a heating furnace, upsetting after discharging, punching, drawing out and reaming.
Further, in the step 4), the inner hole auxiliary cylinder body is embedded into the inner side of the cylinder body blank in the hole expanding process, and the inner hole auxiliary cylinder body and the cylinder body blank are simultaneously subjected to hole expanding forging to form a composite forging cylinder body.
Further, the blank is obtained by cutting a dead head through an ingot.
Further, the drawing process comprises drawing for multiple times, and if the temperature of the blank is reduced to the finish forging temperature in the drawing process, the blank is returned to the furnace and is preserved again, and then drawing is carried out again.
The invention also provides a composite production method of the large-scale cylinder, which comprises a cylinder blank, and is characterized by also comprising an outer ring auxiliary cylinder and an inner hole auxiliary cylinder, wherein the processing steps are as follows:
1) Selecting a blank, wherein the barrel blank processed by the weight of the blank can meet the requirement of the machining allowance of the end face, but the machining allowances of the outer wall and the inner wall of the barrel blank are both smaller than the requirement of the machining allowance;
2) Forging the blank selected in the step 1) to form a barrel blank;
3) Preparing an outer ring auxiliary cylinder and an inner hole auxiliary cylinder, wherein the outer diameter of the outer ring auxiliary cylinder is matched with the outer diameter of the cylinder blank which meets the allowance of the processing technology requirement, and the inner diameter of the outer ring auxiliary cylinder is larger than the outer diameter of the cylinder blank; the inner diameter of the inner hole auxiliary cylinder is matched with the inner diameter of the processing allowance of the technological requirement of the cylinder blank piece, and the outer diameter of the inner hole auxiliary cylinder is smaller than the inner diameter of the cylinder blank piece;
4) Sleeving the outer ring auxiliary cylinder body on the outer side of the cylinder body blank, nesting the inner hole auxiliary cylinder body on the inner side of the cylinder body blank, and continuing reaming and forging to form a composite forged cylinder body; the outer diameter and the inner diameter of the composite forging cylinder both meet the requirement of machining allowance;
5) And processing the composite forging cylinder according to the machining requirement to form the finished cylinder.
Further, the forging process of the blank in the step 2) comprises heat preservation in a heating furnace, upsetting after discharging, punching, drawing out and reaming.
Further, in the step 4), the outer ring auxiliary cylinder is sleeved on the outer side of the cylinder blank before broaching after the blank is drawn out, then the outer ring auxiliary cylinder and the cylinder blank are simultaneously reamed, the inner hole auxiliary cylinder is embedded on the inner side of the cylinder blank in the reaming process, and the outer ring auxiliary cylinder, the cylinder blank and the inner hole auxiliary cylinder are continuously and simultaneously reamed and forged.
Further, the blank is obtained by cutting a dead head through an ingot.
Further, the drawing process comprises drawing for multiple times, and if the temperature of the blank is reduced to the final forging temperature in the drawing process, the blank is returned to the furnace for heat preservation again and then drawing is carried out again.
The invention has the beneficial effects that:
1. according to the method, the blank with the weight not meeting the requirement of the machining allowance can be used for obtaining the barrel blank, the outer ring auxiliary barrel with the inner diameter slightly larger than the outer diameter of the barrel blank is sleeved outside the barrel blank, and the composite forging barrel is obtained through forging again, and can simultaneously meet the requirement of the machining allowance of the end face, the inner wall and the outer wall, so that an enterprise is helped to expand the production capacity by utilizing the cast ingot with the existing specification, the purchase of large cast ingot is avoided, and the economic and social benefits are favorably improved;
2. according to the invention, the outer ring auxiliary cylinder body is sleeved on the outer side of the cylinder body blank before broaching after the blank is drawn out, so that a space for continuous forging is reserved in the composite forging cylinder body, and the subsequent forging processing is facilitated;
3. the method can produce and obtain the barrel blank by utilizing the blank with the weight which does not meet the requirement of machining allowance, the inner thin-wall barrel with the outer diameter slightly smaller than the inner diameter of the barrel blank is nested in the barrel blank, and the composite forging barrel is obtained by forging again, and can simultaneously meet the requirement of the machining allowance of the end face, the inner wall and the outer wall, so that an enterprise is helped to expand the production capacity by utilizing the cast ingot with the existing specification, the purchase of a large cast ingot is avoided, and the economic and social benefits are favorably improved;
4. the inner hole auxiliary cylinder body is embedded to the inner side of the cylinder body blank in the reaming process, so that a space for continuous forging is reserved in the composite forging cylinder body, and the subsequent forging processing is facilitated;
5. the method can produce and obtain the barrel blank by utilizing the blank with the weight which does not meet the requirement of the machining allowance, the outer ring auxiliary barrel with the inner diameter size which is slightly larger than the outer diameter of the barrel blank is sleeved outside the barrel blank, the inner thin-wall barrel with the outer diameter size which is slightly smaller than the inner diameter of the barrel blank is nested inside the barrel blank, and the composite forging barrel is obtained by forging again.
6. The outer ring auxiliary cylinder body is sleeved on the outer side of the cylinder body blank before broaching after the blank is drawn out, then the outer ring auxiliary cylinder body and the cylinder body blank are simultaneously reamed, and the inner hole auxiliary cylinder body is embedded on the inner side of the cylinder body blank in the reaming process, so that a space for continuous forging is reserved in the composite forging cylinder body, and the subsequent forging processing is facilitated.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a second embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a third embodiment of the present invention;
in the figure, 1, a barrel blank; 2. an outer ring auxiliary cylinder body; 3. the cylinder is assisted to the hole.
Detailed Description
The principles and features of this invention are described below in conjunction with examples, which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
The first embodiment is as follows:
as shown in fig. 1, in a first embodiment, the present invention discloses a composite production method of a large cylinder, in this embodiment, the dimensions of the finished cylinder to be produced are: phi 1560/phi 1440 is multiplied by 2300mm (namely, the outer diameter is phi 1560mm, the inner diameter is phi 1440mm, the length is 2300 mm), and the weight is as follows: 5790kg, the barrel blank 1 which is required for producing the finished barrel with the above size and meets the allowance of the processing technology requirement has the following size: phi 1600/phi 1410 × 2650mm, weight: 10595kg.
According to the composite production method of the large-sized cylinder provided by the invention, the method comprises the following steps:
firstly, adopting an ingot produced by using a 10500kg ingot mold, wherein the weight of a blank obtained after the ingot mold cuts a dead head is 9250kg, and a barrel blank 1 processed by the weight of the selected blank cannot simultaneously meet the requirements of machining allowance of an end face, an inner wall and an outer wall, and if the weight is according to a normal production process, the machining allowance of the outer wall cannot be ensured if the allowance of the inner wall and the end face is ensured;
secondly, ensuring the allowance of the inner wall and the end face, keeping the blank in a heating furnace at a proper forging temperature for a sufficient time, discharging the blank out of the furnace for forging, wherein the forging process comprises upsetting, punching, drawing and reaming, the time for sleeving the outer cylinder blank 1 and the cylinder blank is preferably before reaming is carried out after the blank is drawn out, the size of the cylinder blank 1 obtained before reaming is carried out after the blank is drawn out is phi 890/phi 560 x 2650mm, the drawing process comprises drawing for multiple times, and if the temperature of the blank is reduced to the final forging temperature in the drawing process, the blank is returned to the furnace for heat preservation again and then drawn out again;
thirdly, preparing an outer ring auxiliary cylinder body 2 with the size of phi 947/phi 895 multiplied by 2650mm, wherein the outer ring auxiliary cylinder body 2 is formed by forging blanks with the blanking weight of 1890kg, and the inner diameter phi 895mm of the outer ring auxiliary cylinder body 2 is larger than the outer diameter phi 890mm of the cylinder blank 1, so that the outer ring auxiliary cylinder body 2 is easily sleeved on the outer side of the cylinder blank 1 in the fourth step;
fourthly, sleeving the outer ring auxiliary cylinder body 2 on the outer side of the cylinder body blank 1, continuously forging, then performing hot forging after the outer ring auxiliary cylinder body 2 and the cylinder body blank 1 are sleeved with each other, forging the gap and combining to form a composite forging cylinder body with the size phi 1600/phi 1410 × 2650mm (wherein the size of the outer ring auxiliary cylinder body 2 is phi 1600/phi 1570 × 2650mm, the size of the cylinder body blank 1 is phi 1570/phi 1410 × 2650 mm), the machining allowance of the inner wall of the composite forging cylinder body is phi 1440-phi 1410=30mm, the single-side allowance is 15mm, the machining allowance of the outer wall of the composite forging cylinder body is phi 1600-phi 1560=40mm, the single-side allowance is 20mm, and both the inner diameter and the outer diameter of the composite forging cylinder body meet the requirement of the machining allowance;
and fifthly, machining the composite forging cylinder according to machining requirements, wherein the outer ring auxiliary cylinder 2 can be turned off in the machining process to form a finished cylinder with the size of phi 1560/phi 1440 x 2300 mm.
If the finished cylinder with the size of phi 1560/phi 1440 multiplied by 2300mm is produced by the traditional process, the required blank weight is as follows: 11000kg, and further the weight of the ingot casting before the riser needs to be removed is 12500kg, the barrel body blank 1 processed by the conventional 10500kg ingot casting cannot simultaneously meet the requirements of machining allowance of an end face, an inner wall and an outer wall, if the allowance of the inner wall and the end face is ensured, the size of the barrel body blank 1 obtained after forging is phi 1570/phi 1410 × 2650mm, the length size 2650mm and the inner diameter size phi 1410mm of the barrel body blank 1 meet the requirement of machining allowance, the outer diameter size phi 1570mm is smaller than the outer diameter phi 1600mm of the allowance required by a processing technology, the allowance of the outer wall is only phi 1570-phi 1560=10mm, the unilateral allowance is only 5mm, and the allowance requirement of machining allowance of a finished barrel body with the size of 156phi 1440 × 2300mm cannot be met, and the production of the finished barrel body with the size of 1560/phi 1440 × 2300mm can be completed by using the conventional 10500kg ingot casting through the method of the specific embodiment.
The second concrete embodiment:
as shown in fig. 2, in a second embodiment, the invention discloses a composite production method of a large cylinder, in this embodiment, the dimensions of the finished cylinder to be produced are as follows: phi 1500/phi 1380 × 2210mm; the weight is 5340kg, and the size of the barrel blank 1 which is required for producing the finished barrel with the size and meets the allowance of the processing technology requirement is as follows: phi 1540/phi 1350 × 2560mm; the weight is as follows: 9830kg.
According to the composite production method of the large-sized cylinder provided by the invention, the method comprises the following steps:
firstly, adopting an ingot produced by using an ingot mould of 10500kg, wherein the weight of a blank obtained after a riser of the ingot is cut is 9250kg; the barrel blank 1 processed by the weight of the blank selected cannot simultaneously meet the requirements of machining allowances of the end face, the inner wall and the outer wall, and if the weight of the blank is in accordance with a normal production process, the machining allowances of the inner wall cannot be guaranteed if the allowances of the outer wall and the end face are guaranteed.
Secondly, keeping the blank in a heating furnace at a proper forging temperature for a sufficient time, discharging the blank out of the furnace for forging, wherein the forging process comprises upsetting, punching, stretching and reaming, the time when the inner cylinder is nested in the cylinder blank 1 is preferably half of the time when the blank is reamed, the inner cylinder is nested in the cylinder blank 1 when the reaming is half of the time, the size of an inner hole can be ensured to be enough for assisting the nesting of the cylinder, and a space for continuous forging can be provided, so that the operation is more facilitated, the size of the cylinder blank 1 obtained after the half of reaming is phi 899/phi 560X 2560mm, the stretching process comprises multiple stretching, and if the temperature of the blank is reduced to the final forging temperature in the stretching process, the blank is returned to the furnace for heat preservation and then stretched again;
thirdly, preparing an inner hole auxiliary cylinder body 3 with the size of phi 555/phi 502 multiplied by 2560mm, wherein the inner hole auxiliary cylinder body 3 with the size is formed by forging blanks with the blanking weight of 1120kg, the outer diameter phi 555mm of the inner ring auxiliary cylinder body is smaller than the inner diameter phi 560mm of the cylinder blank 1, and the inner hole auxiliary cylinder body 3 is easily nested on the inner side of the cylinder blank 1 in the fourth step;
fourthly, embedding the inner hole auxiliary cylinder 3 on the inner side of the cylinder blank 1, continuously expanding and forging, sleeving the inner hole auxiliary cylinder 3 and the cylinder blank 1 into each other, then performing hot forging, forging the gap to form a composite forged cylinder with the size of phi 1540/phi 1350 × 2560mm (wherein the size of the inner hole auxiliary cylinder 3 is phi 1370/phi 1350 × 2560mm, the size of the cylinder blank 1 is phi 1540/phi 1370 × 2560 mm), the machining allowance of the inner wall of the composite forged cylinder is phi 1380-phi 1350=30mm, the allowance of a single side is 15mm, the machining allowance of the outer wall of the composite forged cylinder is phi 1540-phi 1500=40mm, and the allowance of the single side is 20mm, and the inner diameter and the outer diameter of the composite forged cylinder both meet the requirement of the machining allowance;
and fifthly, machining the composite forging barrel according to machining requirements, wherein the inner hole auxiliary barrel 3 can be turned off in the machining process to form a finished barrel with the size of phi 1500/phi 1380X 2210 mm.
If the finished barrel with the size of phi 1500/phi 1380 multiplied by 2210mm is produced by the traditional process, the required blank weight is as follows: 10220kg, and then the weight of the ingot before dead head removal is 11700kg, the cylinder blank 1 processed by the conventional 10500k ingot cannot simultaneously meet the requirements of machining allowance of the end face, the inner wall and the outer wall, if the outer wall and the end face allowance are ensured, the size of the obtained cylinder blank 1 is phi 1540/phi 1370 × 2560mm, the inner diameter size phi 1370mm of the cylinder blank 1 is compared with the inner diameter phi 1380mm of the finished cylinder, the allowance of the inner wall is only phi 1380-phi 1370=10mm, the allowance of a single side is only 5mm, and the requirement of machining allowance cannot be met, and the production of the finished cylinder with the size phi 1500/138phi 0 × 2210mm can be completed by using the conventional 10500kg ingot through the method of the second embodiment.
The third concrete embodiment:
as shown in fig. 3, in a third embodiment, the invention discloses a composite production method of a large cylinder, in this embodiment, the dimensions of the finished cylinder to be produced are as follows: phi 1700/phi 1580 multiplied by 2400mm, weight is: 6605kg, the blank 1 of the cylinder body required for producing the finished cylinder body with the above size and meeting the allowance of the processing technology is as follows: phi 1740/phi 1550 multiplied by 2750mm, weight is as follows: 12020kg.
According to the composite production method of the large-sized cylinder provided by the invention, the method comprises the following steps:
firstly, adopting an ingot produced by using an ingot mould of 10500kg, wherein the weight of a blank obtained after a riser of the ingot is cut is 9250kg; the barrel blank 1 processed by the weight of the blank selected cannot meet the requirement of the machining allowance of the end face, the inner wall and the outer wall at the same time, and the weight can only guarantee the requirement of the machining allowance of the end face if the weight is in accordance with the normal production process.
Secondly, keeping the blank in a heating furnace at a proper forging temperature for enough time, and then discharging the blank out of the furnace for forging, wherein the forging process comprises upsetting, punching, drawing and reaming, the time for sleeving the outer cylinder and the inner cylinder into the cylinder blank 1 is preferably in the forging process, and the cylinder blank 1 with the size of phi 879/phi 560X 2750mm is obtained in the forging process;
thirdly, preparing an outer ring auxiliary cylinder body 2 with the size of phi 942/phi 885 multiplied by 2750mm and an inner hole auxiliary cylinder body 3 with the size of phi 555/phi 495 multiplied by 2750mm, wherein the outer ring auxiliary cylinder body 2 with the size is formed by forging blanks with the blanking weight of 2120kg, and the inner hole auxiliary cylinder body 3 with the size is formed by forging blanks with the blanking weight of 1315 kg;
fourthly, sleeving the outer ring auxiliary cylinder 2 with the size of phi 942/phi 885 multiplied 2750mm on the outer side of the cylinder blank 1, embedding the inner hole auxiliary cylinder 3 with the size of phi 555/phi 495 multiplied 2750mm on the inner side of the cylinder blank 1, simultaneously forging the outer ring auxiliary cylinder 2, the inner hole auxiliary cylinder 3 and the cylinder blank 1, sleeving the outer ring auxiliary cylinder 2, the inner hole auxiliary cylinder 3 and the cylinder blank 1 into each other, and then carrying out hot forging to forge the gap to form a composite forging cylinder with the size of phi 1740/phi 1550 multiplied 2750mm (wherein the size of the outer ring auxiliary cylinder 2 is phi 1740/phi 1710 multiplied 2750mm, the size of the cylinder blank 1 is phi 1710/phi 1570 multiplied 2750mm, and the size of the inner hole auxiliary cylinder 3 is phi 1550 multiplied 2750 mm); the machining allowance of the inner wall of the composite forging cylinder body is phi 1740-phi 1700=40mm, the allowance of the single side is 20mm, the machining allowance of the outer wall of the composite forging cylinder body is phi 1580-phi 1550=30mm, the allowance of the single side is 15mm, and the inner diameter and the outer diameter of the composite forging cylinder body both meet the requirement of the machining allowance;
and fifthly, machining the composite forging cylinder according to machining requirements, wherein the outer ring auxiliary cylinder 2 and the inner hole auxiliary cylinder 3 can be turned off in the machining process to form a finished cylinder with the size of phi 1700/phi 1580 multiplied by 2400 mm.
If the finished product cylinder with the size of phi 1700/phi 1580 multiplied by 2400mm is produced by the traditional process, the required blank weight is as follows: 12500kg, and further 13800kg of cast ingot weight before dead head removal is needed, the existing 10500k cast ingot cannot meet the production requirement, and if the machining allowance requirement of the end face is met, the size of the cylinder blank 1 obtained after forging is as follows: phi 1710/phi 1570 multiplied by 2750mm; the allowance of the end face is enough, but the allowance of the outer wall is phi 1710-phi 1700=10mm, the allowance of the single side is only 5mm, the allowance of the inner wall is phi 1580-phi 1570=10mm, and the allowance of the single side is only 5mm, so that the allowance requirement of machining on a freely forged workpiece and a large cylinder body is far not met;
by the method, the blank with the weight not meeting the requirement of machining allowance can be used for obtaining the barrel blank 1, and the composite barrel capable of meeting the requirement of the machining allowance of the end face, the inner wall and the outer wall at the same time is forged in a mode of sleeving one auxiliary barrel inside and/or outside the barrel blank 1, so that an enterprise is helped to expand the production capacity by utilizing the cast ingot with the existing specification, purchase of a large cast ingot is avoided, and economic and social benefits are improved. 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, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (4)
1. The composite production method of the large-scale cylinder comprises a cylinder blank and is characterized by further comprising an outer ring auxiliary cylinder body, and the processing steps are as follows:
1) Selecting a blank, wherein the barrel blank processed by the weight of the blank can meet the requirements of end face machining allowance and inner wall machining allowance, but the outer wall machining allowance of the barrel blank is smaller than the requirement of machining allowance;
2) Forging the blank selected in the step 1) to form a barrel blank;
3) Preparing an outer ring auxiliary cylinder, wherein the inner diameter of the outer ring auxiliary cylinder is larger than the outer diameter of the cylinder blank;
4) Sleeving the outer ring auxiliary cylinder body on the outer side of the cylinder body blank, and simultaneously forging the outer ring auxiliary cylinder body and the cylinder body blank to form a composite forged cylinder body; the inner diameter and the outer diameter of the composite forging cylinder body both meet the requirement of machining allowance;
5) And processing the composite forging cylinder according to the machining requirement to form a finished cylinder.
The forging process of the blank in the step 2) comprises heat preservation in a heating furnace, upsetting after discharging, punching, drawing and reaming;
and 4) sleeving the outer ring auxiliary cylinder body on the outer side of the cylinder body blank before broaching after the blank is drawn out, and simultaneously continuing broaching forging on the outer ring auxiliary cylinder body and the cylinder body blank to form a composite forging cylinder body.
2. The composite production method of a large-sized cylinder according to claim 1, wherein the drawing process comprises a plurality of times of drawing, if the temperature of the blank is reduced to the final forging temperature in the drawing process, the blank is returned to the furnace for heat preservation again and then drawing is carried out again.
3. The composite production method of the large-scale cylinder comprises a cylinder blank and is characterized by further comprising an inner hole auxiliary cylinder body, and the processing steps are as follows:
1) Selecting a blank, wherein the barrel blank processed by the weight of the blank can meet the requirements of end face machining allowance and outer wall machining allowance, but the machining allowance of the inner wall of the barrel blank is smaller than the requirement of the machining allowance;
2) Forging the blank selected in the step 1) to form a barrel blank;
3) Preparing an inner hole auxiliary cylinder, wherein the outer diameter of the inner hole auxiliary cylinder is smaller than the inner diameter of the cylinder blank;
4) Nesting the inner hole auxiliary cylinder body on the inner side of the cylinder body blank, and simultaneously continuing reaming and forging the inner hole auxiliary cylinder body and the cylinder body blank to form a composite forged cylinder body; the inner diameter and the outer diameter of the composite forging cylinder both meet the requirement of machining allowance;
5) And processing the composite forging cylinder according to the machining requirement to form a finished cylinder.
The forging process of the blank in the step 2) comprises heat preservation in a heating furnace, upsetting, punching, drawing and reaming after discharging;
and 4) embedding the inner hole auxiliary cylinder body on the inner side of the cylinder body blank in the reaming process, and simultaneously continuing reaming and forging the inner hole auxiliary cylinder body and the cylinder body blank to form a composite forging cylinder body.
4. The composite production method of the large-scale cylinder comprises a cylinder blank, and is characterized by further comprising an outer ring auxiliary cylinder and an inner hole auxiliary cylinder, and the processing steps are as follows:
1) Selecting a blank, wherein the barrel blank processed by the weight of the blank can meet the requirement of the machining allowance of the end face, but the machining allowances of the outer wall and the inner wall of the barrel blank are both smaller than the requirement of the machining allowance;
2) Forging the blank selected in the step 1) to form a barrel blank;
3) Preparing an outer ring auxiliary cylinder and an inner hole auxiliary cylinder, wherein the inner diameter of the outer ring auxiliary cylinder is larger than the outer diameter of the cylinder blank piece, and the outer diameter of the inner hole auxiliary cylinder is smaller than the inner diameter of the cylinder blank piece;
4) Sleeving the outer ring auxiliary cylinder body on the outer side of the cylinder body blank, nesting the inner hole auxiliary cylinder body on the inner side of the cylinder body blank, and continuing reaming and forging to form a composite forged cylinder body; the outer diameter and the inner diameter of the composite forging cylinder both meet the requirement of machining allowance;
5) And processing the composite forging cylinder according to the machining requirement to form a finished cylinder.
The forging process of the blank in the step 2) comprises heat preservation in a heating furnace, upsetting, punching, drawing and reaming after discharging;
and 4) sleeving the outer ring auxiliary cylinder body on the outer side of the cylinder body blank before broaching after the blank is drawn out, simultaneously broaching the outer ring auxiliary cylinder body and the cylinder body blank, embedding the inner hole auxiliary cylinder body on the inner side of the cylinder body blank in the broaching process, and continuously simultaneously broaching and forging the outer ring auxiliary cylinder body, the cylinder body blank and the inner hole auxiliary cylinder body.
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| CN1265913C (en) * | 2004-08-18 | 2006-07-26 | 冯发明 | Retaining ring steel hot forging technology for generator |
| CN101633115A (en) * | 2009-08-06 | 2010-01-27 | 刘怀文 | Novel method for producing high-grade alloy steel seamless steel tube |
| CN101934341A (en) * | 2010-09-20 | 2011-01-05 | 宝鸡市利泰有色金属有限公司 | Forging technology of TC4 titanium alloy cylindrical part |
| CN102554088A (en) * | 2010-12-10 | 2012-07-11 | 上海重型机器厂有限公司 | Forging method for pressure vessel bottom head transition section of second-generation nuclear power station and mould |
| JP6109709B2 (en) * | 2013-03-15 | 2017-04-05 | 日本特殊陶業株式会社 | Manufacturing method by cold forging of different diameter cylindrical molded body, and manufacturing method of metal shell for gas sensor |
| CN106111862B (en) * | 2016-08-29 | 2017-12-26 | 中航动力股份有限公司 | A kind of forging method of GH4901 sleeves spacer ring |
| CN111570689B (en) * | 2020-04-28 | 2022-03-22 | 攀钢集团江油长城特殊钢有限公司 | Forging method of barrel |
| CN113510216B (en) * | 2021-03-31 | 2023-02-21 | 西安航天发动机有限公司 | Forging forming method for niobium-tungsten alloy ring-shaped piece |
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