CN215279714U

CN215279714U - Die for 8 megawatt main shaft die forging

Info

Publication number: CN215279714U
Application number: CN202120832804.3U
Authority: CN
Inventors: 闫振伟; 刘圣祥; 戚振华; 徐建东
Original assignee: Jiangyin Zenkung Forging Co ltd
Current assignee: Zhenhong Heavy Industry Jiangsu Co ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2021-12-24
Anticipated expiration: 2031-04-22

Abstract

The utility model discloses a 8 megawatt mould for main shaft die forging, including last mould and bed die, the bed die is including rotatable piece, places in the rotatable piece and treats the die forging blank, and the size that can rotate is greater than and treats the die forging blank. The utility model discloses there is sufficient space to be convenient for push down the shaping, reduces the quantity of steel ingot raw and other materials. At present, only a press machine of 1 ten thousand tons is needed to finish large die forging products by small equipment, 46 tons of blanks are needed to be fed by using the method in the prior art, and after the die forging process is adopted, the blanks only need to be fed by 33 tons of blanks, the machining allowance is small, the steel ingot investment is reduced to 13 tons of blanks, and the raw material cost is saved.

Description

Die for 8 megawatt main shaft die forging

Technical Field

The utility model relates to a 8 megawatt main shaft mould forging is with mould.

Background

An offshore wind power plant is a novel power plant which generates power by using offshore wind resources. Under the condition of increasingly severe petroleum resource situation, all countries project eyes to sea areas with huge wind power resources, and a plurality of offshore wind power plants are built in a plurality of countries in Europe and are huge in scale. China also gradually relates to the field of offshore wind power generation, offshore wind power plants in Shanghai are started in 2010, and hong Kong wants to build the largest offshore wind power plant in China. With the increasing of the offshore wind power, the main shaft of a large wind power main machine, such as a large 8-megawatt main shaft, has a large size and a complex shape, and the diameter of the main shaft is about 2.9 meters, so that the tonnage of a press is not enough during die forging, and how to reduce the production cost of the product is a difficult problem faced by the existing wind power manufacturing enterprises.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the defect that exists among the prior art, provide a 8 megawatt mould for main shaft die forging, have sufficient space and be convenient for push down the shaping, reduce the quantity of steel ingot raw and other materials. At present, only a press machine of 1 ten thousand tons is needed to finish large die forging products by small equipment, 46 tons of blanks are needed to be fed by using the method in the prior art, and after the die forging process is adopted, the blanks only need to be fed by 33 tons of blanks, the machining allowance is small, the steel ingot investment is reduced to 13 tons of blanks, and the raw material cost is saved.

In order to achieve the purpose, the technical scheme of the utility model is to design a 8 megawatt mould for main shaft die forging, including last mould and bed die, the bed die is including rotating the piece, places in the rotatable piece and treats the die forging blank, and the size that can rotate is greater than and treats the die forging blank. The upper die is fixed on the movable sliding block of the press, so that the upper die can only move up and down and cannot move horizontally, and the upper die moves up and down along with the movable sliding block of the press, so that the pressing amount during die forging is realized.

The further technical proposal is that the rotatable part is a rotary turntable component which is connected with a hydraulic driving gear; the lower die further comprises a lower die pad arranged above the rotary turntable assembly, and an outer die ring is arranged above the lower die pad. Because the maximum inner diameter of the inner wall of the step ring of the outer die ring is larger than the size of the large-size end of the blank, enough space is provided for pressing and forming conveniently, and the consumption of raw materials of steel ingots is reduced.

The further technical scheme is that a gear ring meshed with the hydraulic driving gear is fixedly arranged on the outer side wall of the rotary turntable assembly.

The further technical scheme is that the lower die pad is annular, a positioning ring is arranged on the upper surface of the lower die pad in a protruding mode, and an annular groove matched with the positioning ring is formed in the outer die ring.

The further technical proposal is that the outer die ring is in a ring shape, the inner wall of the outer die ring is in a step ring shape, and the maximum inner diameter of the inner wall of the step ring is larger than the size of the large-size end of the blank.

The further technical scheme is that the upper die comprises a forming head for press forming and a cuboid which is integrally formed with the forming head and protrudes towards two ends, and the longitudinal section shape of the forming head is matched with the longitudinal section shape of an opening at the upper end of the middle part of the die forging blank.

The utility model has the advantages and the beneficial effects that: enough space is provided for pressing and forming, and the consumption of raw materials of steel ingots is reduced. At present, only a press machine of 1 ten thousand tons is needed to finish large die forging products by small equipment, 46 tons of blanks are needed to be fed by using the method in the prior art, and after the die forging process is adopted, the blanks only need to be fed by 33 tons of blanks, the machining allowance is small, the steel ingot investment is reduced to 13 tons of blanks, and the raw material cost is saved.

Drawings

Fig. 1 is a schematic view of an 8 mw spindle forging die of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a schematic structural diagram of the outer mold ring of FIG. 2;

FIG. 4 is a cross-sectional view of FIG. 3;

FIG. 5 is a schematic view of the upper mold of FIG. 1;

FIG. 6 is a schematic view of the lower die pad of FIG. 2;

FIG. 7 is a cross-sectional view of FIG. 6;

FIG. 8 is a schematic view of the shape of the ingot before swaging;

FIG. 9 is a preformed shape of the blank;

FIG. 10 is a schematic illustration of the billet after swaging;

fig. 11 is a schematic view of an original free end blank.

In the figure: 1. an upper die; 2. a blank; 3. rotating the turntable assembly; 4. a hydraulic drive gear; 5. a lower die cushion; 6. an outer mold ring; 7. a toothed ring; 8. a positioning ring; 9. a ring groove; 10. a forming head; 11. a cuboid; 12. the upper end is open.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1 to 7, the utility model relates to a 8 megawatt main shaft is mould for forging, including last mould 1 and bed die, the bed die is including rotatable piece, places in the rotatable piece and treats forging blank 2, and rotatable piece's size is greater than and treats forging blank 2. The rotatable part is a rotary turntable component 3, and the rotary turntable component 3 is connected with a hydraulic driving gear 4; the lower die further comprises a lower die cushion 5 arranged above the rotary turntable assembly 3, and an outer die ring 6 is arranged above the lower die cushion 5. A gear ring 7 meshed with the hydraulic driving gear 4 is fixedly arranged on the outer side wall of the rotary turntable component 3. The lower die cushion 5 is annular, a positioning ring 8 is arranged on the upper surface of the lower die cushion 5 in a protruding mode, and an annular groove 9 matched with the positioning ring 8 is formed in the outer die ring 6. The outer die ring 6 is annular, the inner wall of the outer die ring is in a step ring shape, and the maximum inner diameter of the inner wall of the step ring is larger than the size of the large-size end of the blank 2. The upper die 1 includes a forming head 10 for press forming and a rectangular parallelepiped 11 formed integrally with the forming head 10 and protruding toward both ends, and the longitudinal sectional shape of the forming head 10 matches the longitudinal sectional shape of an opening 12 at the upper end of the middle of the die forging blank.

The die forging production process comprises the following working procedures in sequence: forging (shown in fig. 8, which is a schematic diagram of a steel ingot), heat treatment after forging, inspection, rough machining, secondary inspection, secondary heat treatment, physical and chemical detection and finish machining; in the forging and pressing process, the blank to be forged is placed into a special die to carry out rotary local forming on the blank. Because of sectional pressing, only a press machine of 1 ten thousand tons is needed at present, the dry and large die forging of small equipment is realized, 46 tons of blanks are needed by using the method in the prior art, only 33 tons of blanks are needed by using the die forging process at present, the machining allowance is small, the steel ingot investment is reduced to 11 tons, and the raw material cost is saved. In the forging and pressing process, the steel ingot is taken out of the holding furnace after being held by the holding furnace, then chamfered, processed with a wrong sprue and a chopped riser, and then sent into the holding furnace for heat preservation; the temperature of the holding furnace is 1250 ℃. And after the steel ingot is sent into the heat preservation furnace again for heat preservation, taking the steel ingot out of the heat preservation furnace, sequentially upsetting, drawing out, upsetting again, flattening the end face to form a blank, and returning the blank to the heat preservation furnace for heat preservation continuously. Taking out the blank from the holding furnace, preforming the blank (the preformed shape is shown in figure 9), and putting the preformed blank into the holding furnace again to keep the temperature. And (3) taking the blank out of the heat preservation furnace, putting the blank into a special die, performing rotary local forming on the blank, wherein the reduction is 80-100 mm in height each time, punching a central hole after press forming, and the aperture of the central hole is 550mm (the schematic diagram after blank die forging is shown in figure 10). Compared with the original free forging (as shown in figure 11), the blank input is reduced by 11 tons of steel ingots.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

The die for 1.8 megawatt spindle die forging is characterized by comprising an upper die and a lower die, wherein the lower die comprises a rotatable part, a blank to be die forged is placed in the rotatable part, and the size of the rotatable part is larger than that of the blank to be die forged.
2. The die for 8 megawatt spindle swaging according to claim 1, wherein the rotatable member is a rotary turret assembly, the rotary turret assembly being connected to a hydraulic drive gear; the lower die further comprises a lower die pad arranged above the rotary turntable assembly, and an outer die ring is arranged above the lower die pad.
3. The die for 8 megawatt spindle swaging according to claim 2, wherein a ring gear that engages with the hydraulic drive gear is fixedly provided on an outer side wall of the rotary turret assembly.
4. The die for 8 megawatt main shaft die forging according to claim 3, wherein the lower die pad is annular, a positioning ring is protruded on the upper surface of the lower die pad, and the outer die ring is provided with a ring groove matched with the positioning ring.
5. The die for 8 megawatt spindle swaging according to claim 4, wherein the outer die ring has a circular ring shape, an inner wall of the outer die ring has a stepped ring shape, and a maximum inner diameter of the inner wall of the stepped ring is larger than a large-size end of the billet.
6. The die for 8 megawatt spindle swaging according to claim 5, wherein the upper die includes a forming head for press forming and a rectangular parallelepiped protruding toward both ends integrally formed with the forming head, and the forming head has a longitudinal sectional shape matching a longitudinal sectional shape of a middle upper end opening of the swaged blank.