CN116984535A - Bent axle bending and forging forming device and process for large ship - Google Patents
Bent axle bending and forging forming device and process for large ship Download PDFInfo
- Publication number
- CN116984535A CN116984535A CN202310870519.4A CN202310870519A CN116984535A CN 116984535 A CN116984535 A CN 116984535A CN 202310870519 A CN202310870519 A CN 202310870519A CN 116984535 A CN116984535 A CN 116984535A
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- China
- Prior art keywords
- blank
- upper die
- die system
- press
- bending
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005242 forging Methods 0.000 title claims abstract description 32
- 238000005452 bending Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 abstract description 4
- 235000013372 meat Nutrition 0.000 abstract description 4
- 230000007812 deficiency Effects 0.000 abstract description 2
- 230000002787 reinforcement Effects 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004807 localization Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
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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
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/08—Accessories for handling work or tools
- B21J13/085—Accessories for handling work or tools handling of tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/10—Drives for forging presses
- B21J9/12—Drives for forging presses operated by hydraulic or liquid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/10—Drives for forging presses
- B21J9/20—Control devices specially adapted to forging presses not restricted to one of the preceding subgroups
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention belongs to the technical field of bending of large-scale forging, and particularly relates to a bent axle bending forming device and a bent axle bending forming process for a large-scale ship. The process adopts the combination of a computer control technology and a link reinforcement technology to realize the shape-following bending forming of the blank, and reduces the phenomena of meat deficiency and out-of-tolerance caused by blank shrinkage and stretching; the phenomenon that the die and the blank generate large friction is completely solved, the blank is bent along with the shape of the die, the size of the blank is accurately controlled, the phenomenon of folds is avoided, and the requirement of a bending forging process is met.
Description
Technical Field
The invention belongs to the technical field of bending of large-scale forging, and particularly relates to a bent axle bending forming device and a bent axle bending forming process for a large-scale ship.
Background
The diesel engine is the heart of the ship, the life cycle of the diesel engine is the life cycle of the ship, and the low-speed crankshaft is a diesel engine core component which is not replaceably repaired in the life of the ship, and the marine crankshaft is a very important component which accompanies the life of the ship. In addition, the shipbuilding capacity and the shipbuilding quantity of one country also depend on the quantity of low-speed crankshafts which shipbuilding enterprises can possess. The current countries with the number and capacity of shipbuilding in the first three are china, korea and japan. At present, large marine crankshaft forging parts (70-92 grades) in China are imported from Korea completely, so that the cost of the large marine crankshaft forging parts is as high as 5 hundred million RMB (RMB) from abroad each year, and the construction period is always prolonged and is limited by people.
The traditional bending forging process of the large-scale crank adopts a lower U-shaped upper tongue plate tool, and in the actual operation process, the dimension control is inaccurate due to poor bending limit; when in bend forging, the friction force between the lower die and the blank is large, so that the blank is pulled and contracted, the blank is often insufficient in size, and the blank is lack of meat. Therefore, in order to solve the core technical problems, solve the problems of mass production and localization, form stable production capacity to ensure the requirements of shipyards in China on marine crankshafts, and realize the imperative localization manufacturing of large-scale low-speed crankshaft forgings.
Disclosure of Invention
Based on the problems in the prior art, the invention provides a large-scale marine bent axle bend forging device and a process thereof, and a large-scale bent axle bend forging method. The process adopts the combination of a computer control technology and a link reinforcement technology to realize the shape-following bending forming of the blank, and reduces the phenomena of meat deficiency and out-of-tolerance caused by blank shrinkage and stretching; the phenomenon that the die and the blank generate large friction is completely solved, the blank is bent along with the shape of the die, the size of the blank is accurately controlled, the phenomenon of folds is avoided, and the requirement of a bending forging process is met.
The aim of the invention is achieved by the following technical scheme.
The utility model provides a large-scale marine bent axle bent forging forming device, includes mould system 1, bed die system 2 and latch segment 3, and latch segment 3 sets up on bed die system 2, and mould system 1 sets up in bed die system 2 top.
Further, two ends of the upper die system 1 are hinged with an upper die connecting rod 4, a hydraulic cylinder 6 is arranged in the middle of the upper die system 1, piston rods at two ends of the hydraulic cylinder 6 are connected with the middle of the upper die connecting rod 4, a press roller 5 is arranged at the end part of the upper die connecting rod 4, and the press roller 5 corresponds to the locking block 3.
Further, the lower die system 2 includes a tongue plate 7 and a limiting side plate 8; the tongue plate 7 is arranged between the two limiting side plates 8, and the tongue plate 7 is connected with the locking block 3.
A large-scale marine bent axle bend forging forming process specifically comprises the following steps:
step 1, firstly opening a crank on a press to manufacture blanks, and controlling the sizes of the blanks as much as possible;
step 2, heating the blank, controlling the heating temperature, and ensuring the heating uniformity of the blank;
step 3, installing a bent axle bending and forging forming device for the large ship;
step 4, placing the blank on a lower die system 2 of a large-scale marine bent axle bent forging forming device, and locking a processed workpiece on a tongue plate 7 of the lower die system 2 by a locking block 3;
step 5, the upper die system 1 is connected with a press, when the press applies downward force, the whole upper die system 1 moves downward along with the press, the upper die link rod 4 is connected with a hydraulic cylinder 6, and a computer controls the position of an oil cylinder to press down along with the shape;
and 6, after being pressed down in place, lifting the press, opening the locking block 3, taking out the blank, and finishing bending.
Compared with the prior art, the invention has the beneficial effects that.
The invention has novel design thought, the traditional bending forging crank method is to place a workpiece on a die, the die is provided with a downward groove, the workpiece is pressed into the groove of the die by pressing down by a press, and the bending forging forming is completed. The invention is performed in the opposite way, the groove is arranged above, the press presses the groove downwards, and the workpiece enters the groove of the die from below, so that the workpiece is formed by bending and forging.
Another advantage of the present invention is that: the invention uses the compression roller to control the bending shape of the workpiece. The specific implementation principle is as follows: the position of the hydraulic cylinder is controlled by a computer to control the opening and closing angle of the upper die connecting rod, the connecting rod is connected with the press roller, and the press roller is directly contacted with the workpiece, so that the workpiece can be bent into a set shape. Compared with the traditional bend forging method, the contact between the workpiece and the press roller is not sliding friction in the descending process of the press, the press roller rotates in the contact process, friction is reduced, meanwhile, the effect of flattening the surface of the workpiece can be achieved, the problem of shrinkage and meat shortage caused by friction between the die and the blank can be solved, and the yield is improved. Because the computer controls the pressing speed and adjusts the distance between the pressing rollers, the bending size of the blank is controlled by the computer, namely, the blank is bent along with the shape of the crank, the control is more accurate, and the operation is easy. In addition, a set of die can process workpieces with multiple sizes by controlling the opening and closing angles of the upper die connecting rod, so that the cost for manufacturing the dies with multiple sizes is saved, and meanwhile, the production efficiency can be greatly improved.
The defects such as flare and waist can be generated in the traditional method (as shown in fig. 4), but the situation can not be generated by adopting the process of the invention.
Drawings
FIG. 1 is a schematic diagram of a large-scale marine crankshaft bending and forging forming device.
Fig. 2 is a drawing showing the molding process of step 1 of example 1.
Fig. 3 is a drawing showing the pressing process of the molding apparatus of example 1.
FIG. 4 is a diagram showing a defect of a workpiece according to a conventional method.
Wherein 1 a mold system; 2, a lower die system; 3. a locking block; 4. an upper mold link; 5, a press roller; 6. a hydraulic cylinder; 7 tongue plates; 8. and limiting the side plates.
Detailed Description
The present invention is further described with reference to the following detailed description. Wherein the drawings are for illustrative purposes only and are shown in schematic and non-physical drawings, and are not to be construed as limiting the patent of the invention; for better illustration of the embodiments of the present invention, some of the elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
As shown in fig. 1, a large-scale marine bent axle bend forging forming device comprises an upper die system 1, a lower die system 2 and a locking block 3, wherein the locking block 3 is arranged on the lower die system 2, and the upper die system 1 is arranged above the lower die system 2; the two ends of the upper die system 1 are hinged with an upper die connecting rod 4, the middle part of the upper die system 1 is provided with a hydraulic cylinder 6, piston rods at the two ends of the hydraulic cylinder 6 are connected with the middle part of the upper die connecting rod 4, the end part of the upper die connecting rod 4 is provided with a press roller 5, and the press roller 5 corresponds to the locking block 3; the tongue plate 7 is arranged between the two limiting side plates 8, and the tongue plate 7 is connected with the locking block 3. The locking block 3 locks the processed workpiece on the tongue plate 7 of the lower die system 2, and the limiting side plate 8 is connected with the tongue plate 7 to play a role in limiting the deformation of the workpiece.
A large-scale marine bent axle bend forging forming process specifically comprises the following steps:
step 1, firstly opening a crank on a press to manufacture blanks, and controlling the sizes of the blanks as much as possible;
step 2, heating the blank, controlling the heating temperature, and ensuring the heating uniformity of the blank;
step 3, installing a bent axle bending and forging forming device for the large ship;
and 4, placing the blank on a lower die system 2 of the large-scale marine bent axle bent forging forming device, and locking a processed workpiece on a tongue plate 7 of the lower die system 2 by a locking block 3, wherein a limiting side plate 8 is connected with the tongue plate 7, so that the effect of limiting the deformation of the workpiece is achieved.
Step 5, the upper die system 1 is connected with a press, when the press applies force downwards, the whole upper die system 1 moves downwards along with the press, the upper die connecting rod 4 is connected with the hydraulic cylinder 6, and the computer controls the position of the oil cylinder, so as to control the opening and closing angle of the upper die connecting rod 4, thereby achieving the purpose of controlling the shape of the pressed piece and pressing along with the shape;
and 6, after being pressed down in place, lifting the press, opening the locking block 3, taking out the blank, and finishing bending.
Example 1.
Step 1, firstly performing crank opening blank making on a press, performing blank preforming after upsetting and drawing out preforming operation, and controlling the size of the blank as much as possible in the forming process as shown in figure 2;
step 2, heating the blank, wherein the heating temperature is controlled at 1200 ℃, and the heating uniformity of the blank is ensured;
step 3, installing the upper die and the lower die, and centering the upper die and the lower die;
step 4, rapidly placing the heated blank on a lower die, and locking a locking block to fix the blank on a tongue plate;
step 5, controlling the position of an oil cylinder by a computer so as to enable the press roller to press along with the shape, wherein the downward movement speed of the press is 50mm/s, and the downward pressing process is shown in figure 3;
and 6, after being pressed down in place, lifting the press, opening the locking block, taking out the blank, and completing the bending of the crank.
Claims (4)
1. The bent axle forging forming device for the large ship is characterized by comprising an upper die system (1), a lower die system (2) and a locking block (3); the locking block (3) is arranged on the lower die system (2), and the upper die system (1) is arranged above the lower die system (2).
2. The large-scale marine bent axle bent forging forming device according to claim 1, wherein two ends of the upper die system (1) are hinged with an upper die connecting rod (4), a hydraulic cylinder (6) is arranged in the middle of the upper die system (1), piston rods at two ends of the hydraulic cylinder (6) are connected with the middle of the upper die connecting rod (4), a press roller (5) is arranged at the end of the upper die connecting rod (4), and the press roller (5) corresponds to the locking block (3).
3. The large marine crankshaft bending and forging forming device according to claim 1, wherein the lower die system (2) comprises a tongue plate (7) and a limiting side plate (8); the tongue plate (7) is arranged between the two limiting side plates (8), and the tongue plate (7) is connected with the locking block (3).
4. The bending and forging forming process for the large-scale marine crankshaft is characterized by comprising the following steps of:
step 1, firstly opening a crank on a press to manufacture blanks, and controlling the sizes of the blanks as much as possible;
step 2, heating the blank, controlling the heating temperature, and ensuring the heating uniformity of the blank;
step 3, installing the large-scale marine bent axle bending and forging forming device according to any one of claims 1-3;
step 4, placing the blank on a lower die system (2) of a large-scale marine bent axle bent forging forming device, and locking a machined workpiece on a tongue plate (7) of the lower die system (2) by a locking block (3);
step 5, the upper die system (1) is connected with a press, when the press applies downward force, the whole upper die system (1) moves downward along with the press, the upper die link rod (4) is connected with a hydraulic cylinder (6), and a computer controls the position of an oil cylinder to press along with the shape;
and 6, after being pressed down in place, lifting the press, opening the locking block (3), taking out the blank, and finishing bending.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310870519.4A CN116984535A (en) | 2023-07-17 | 2023-07-17 | Bent axle bending and forging forming device and process for large ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310870519.4A CN116984535A (en) | 2023-07-17 | 2023-07-17 | Bent axle bending and forging forming device and process for large ship |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116984535A true CN116984535A (en) | 2023-11-03 |
Family
ID=88531284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310870519.4A Pending CN116984535A (en) | 2023-07-17 | 2023-07-17 | Bent axle bending and forging forming device and process for large ship |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116984535A (en) |
-
2023
- 2023-07-17 CN CN202310870519.4A patent/CN116984535A/en active Pending
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