CN103100570B - Openable crank extrusion device and forming method of large marine crankshaft crank - Google Patents
Openable crank extrusion device and forming method of large marine crankshaft crank Download PDFInfo
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- CN103100570B CN103100570B CN201110360068.7A CN201110360068A CN103100570B CN 103100570 B CN103100570 B CN 103100570B CN 201110360068 A CN201110360068 A CN 201110360068A CN 103100570 B CN103100570 B CN 103100570B
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- crank
- openable
- extrusion device
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Abstract
The invention discloses an openable crank extrusion device which comprises beams, vertical columns, perpendicular sliding blocks, connecting rod devices and horizontal sliding blocks, wherein the beams are respectively arranged on the two sides of a base plate and are fixedly connected with each other through a plurality of vertical columns; the inner sides of the beams are movably connected with the perpendicular sliding blocks which are movably connected with the horizontal sliding blocks through the connecting rod devices; the horizontal sliding blocks are connected with edge dies; bottom dies are fixedly arranged on the base plate between the two edge dies; the two edge dies and the bottom dies form an extrusion cavity; the bottoms of the perpendicular sliding blocks are connected with perpendicular cylinders; and the outer sides of the horizontal sliding blocks are connected with the beams through horizontal cylinders. The openable crank extrusion device can realize automatic demolding, has a high continuation degree and is easy to operate. By virtue of the openable crank extrusion device, the machining allowance is greatly reduced, and the utilization rate of materials is improved. A large marine crankshaft crank formed by the openable crank extrusion device is high in metal streamline form, dense in tissue and high in mechanical property. The invention also discloses a forming method of the large marine crankshaft crank with the openable crank extrusion device.
Description
Technical field
The present invention relates to a kind of extrusion molding apparatus, be specifically related to a kind of openable crank extrusion device.The invention still further relates to a kind of manufacturing process adopting the crankshaft used for large boat crank throw of openable crank extrusion device.
Background technology
The power output of large-scale marine engine is generally more than 10000 horsepowers.In this engine, the crank throw for built-up crankshaft is very large.The manufacture difficulty of this Large Crankshaft crank throw is very large.
The forging method of existing Large Crankshaft crank throw has following several:
The first, block-type forging method; Crank throw blank forging as shown in Figure 1, is become a corner angle square by the forming process of block-type forging method.The advantage of this method is: simple shape, and be shaped easily, without the need to mould, forging times is few; Suitably can reduce by the crank throw surplus of this method forging, the connecting rod position of centre be cut off and eliminates, then machined is shaped.The shortcoming of this method is: the fibr tissue of crank throw forged steel pieces is cut-off, discontinuous in centre, has impact to serviceability.
The second, ring rolling method; The forming process of ring rolling method as shown in Figure 2, first forges U-shaped blank with hollow steel ingot or through the steel loop of punching, then extrudes the tapering on blank two sides, then makes blank forming by the vertical blank with a die forging block.The shortcoming of this method is: forming difficulty, complex process, stock utilization and formability poor, also may there is the defects such as pore in forging.
The third, die forging; The forming process of die forging as shown in Figure 3, is first pressed into block blank by chamfered edge, jumping-up steel ingot, is then put in die cavity, cover pressure die, suppress with hydraulic press, the defects such as further compacting steel ingot internal defect, finally be pressed into drift to rive, make it to be configured as left and right arms.The shortcoming of this method is: equipment tonnage is large, operating difficulties, and the later stage demoulding is difficult.
4th kind, curved forging method; The forming process of curved forging method as shown in Figure 4, first manufactures and singly turns shape blank, and then bending on bending mould bases, finishing touch is shaped.The shortcoming of this method is: qualification rate is low, and energy consumption is high, and cost is high.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of openable crank extrusion device, and it can realize automatic demoulding.
For solving the problems of the technologies described above, the technical solution of openable crank extrusion device of the present invention is:
Comprise crossbeam, column, vertical slipper, linkage, cross sliding clock, the both sides of base plate are respectively arranged with crossbeam, are fixedly connected with between two crossbeams by many root posts; The inner side articulated vertical slide block of crossbeam, vertical slipper is flexibly connected with cross sliding clock by linkage; Cross sliding clock fillet mould, the base plate between two limit moulds is fixedly installed bed die, and two limit moulds and bed die form and extrude die cavity; The bottom of described vertical slipper connects vertical cylinder, and the outside of described cross sliding clock is by horizontal cylinder connecting cross beam.
The side of described vertical slipper is provided with locking cylinder.
Described crossbeam is connected by track with between base plate.
Described base plate is provided with positioner, for base plate is fixed on travelling table.
Described cross sliding clock connects column by guided way.
Described vertical slipper is flexibly connected with crossbeam by gathering sill.
The present invention also provides a kind of manufacturing process of crankshaft used for large boat crank throw, adopts openable crank extrusion device, being not less than the crankshaft used for large boat crank throw of 700mm × 1000mm × 2000mm, comprising the following steps for forging overall dimensions:
The first step, base; Steel ingot is pressed into square blank;
Second step, is placed in openable crank extrusion device by square blank;
The extruding die cavity of openable crank extrusion device is preheated to 300 ~ 350 DEG C, makes two limit moulds separately, extruding die cavity is in open, the square blank heated is put into extruding die cavity;
Two limit moulds are made mutually to draw close to clamping square blank, fixed press die cavity; Compacting patrix is put into extruding die cavity;
3rd step, adopts openable crank extrusion device to extrude square blank;
The openable crank extrusion device that square blank is housed is placed on travelling table, and by travelling table, openable crank extrusion device is moved into hydraulic press, by hydraulic press, compacting patrix is depressed, make square blank be pressed in bed die, until blank is full of extruding die cavity;
4th step, forms radius bar;
By travelling table, openable crank extrusion device is shifted out hydraulic press, hang out compacting patrix, and stamping knife is connected with press; By travelling table, openable crank extrusion device is moved into hydraulic press, by hydraulic press, stamping knife is depressed, make press depress the degree of depth backed off after random stamping knife of regulation, thus form two radius bars;
5th step, drives two limit moulds to be separated, hangs out workpiece;
6th step, makes workpiece enter furnace treatment reason.
The technique effect that the present invention can reach is:
The present invention can realize fast demoulding, thus shortens the manufacturing cycle of product, and operation is short, and efficiency is high.
The present invention can realize automatic demoulding, and serialization degree is high, simple to operate.
The present invention can reduce machining allowance greatly, improves the utilization rate of material.
The metal flow good linearity of the crankshaft used for large boat crank throw manufactured by the present invention, dense structure, good mechanical property.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the schematic diagram of the forming process of prior art block-type forging method;
Fig. 2 is the schematic diagram of the forming process of prior art ring rolling method;
Fig. 3 is the schematic diagram of the forming process of prior art die forging;
Fig. 4 is the schematic diagram of the forming process of the curved forging method of prior art;
Fig. 5 is the schematic diagram of openable crank extrusion device of the present invention;
Fig. 6 is the top view of Fig. 5;
Fig. 7 is the side view of Fig. 5;
Fig. 8 is the schematic diagram of compacting patrix of the present invention;
Fig. 9 is the schematic diagram of square blank;
Figure 10 is the side view of Fig. 9;
The schematic diagram of the workpiece of Figure 11 made by the manufacturing process of employing crankshaft used for large boat crank throw of the present invention;
Figure 12 is the side view of Figure 11;
Figure 13 is the schematic diagram of crankshaft used for large boat crank throw;
Figure 14 is the side view of Figure 13.
Description of reference numerals in figure:
1 is base plate, and 2 is crossbeam,
3 is vertical cylinder, and 4 is linkage,
5 is column, and 6 is locking cylinder,
7 is cross sliding clock, and 8 is vertical slipper,
9 is horizontal cylinder, and 10 is limit mould,
11 is bed die.
Detailed description of the invention
The manufacturing process of crankshaft used for large boat crank throw of the present invention, adopt openable crank extrusion device, for forging the crankshaft used for large boat crank throw as shown in Figure 13, Figure 14, the overall dimensions of crank throw are not less than 700mm × 1000mm × 2000mm, comprise the following steps:
The first step, base; By chamfered edge, jumping-up, pulling, steel ingot is pressed into satisfactory square blank, as shown in Figure 9, Figure 10;
Second step, is placed in openable crank extrusion device by square blank;
Openable crank extrusion device as shown in Figures 5 to 7, comprises crossbeam 2, column 5, vertical slipper 8, linkage 4, cross sliding clock 7, and the both sides of base plate 1 are respectively arranged with crossbeam 2, is fixedly connected with between two crossbeams 2 by four root posts 5; The inner side articulated vertical slide block 8 of crossbeam 2, vertical slipper 8 is flexibly connected with cross sliding clock 7 by linkage 4; Cross sliding clock 7 fillet mould 10; Base plate 1 between two limit moulds 10 is fixedly installed bed die 11; Two limit moulds 10 and bed die 11 form and extrude die cavity;
The bottom of vertical slipper 8 connects vertical cylinder 3, and the side of vertical slipper 8 is provided with locking cylinder 6; The outside of cross sliding clock 7 is by horizontal cylinder 9 connecting cross beam 2; Vertical cylinder 3 is arranged on base plate 1;
Be connected by track between crossbeam 2 with base plate 1, crossbeam 2 can relative to base plate 1 fine motion.
Base plate 1 is provided with positioner, can be fixed on travelling table.
Cross sliding clock 7 connects column 5 by guided way, vertical slipper 8 is flexibly connected with crossbeam 2 by T font gathering sill, thus cross sliding clock 7 and vertical slipper 8 accurately movement can be made, to guarantee that eccentricity control that workpiece produces in forging process is in claimed range, ensures product percent of pass.
The operation principle of openable crank extrusion device is:
Drive vertical slipper 8 to move up by vertical cylinder 3, the mobile linkage 4 that drives of vertical slipper 8 is movable, thus drives cross sliding clock 7 to right translation, makes two limit moulds 10 separately, is now placed on by workpiece on bed die 11;
Drive vertical slipper 8 to move down by vertical cylinder 3, drive cross sliding clock 7 to left by horizontal cylinder 9, make two limit moulds 10 close, until by Workpiece clamping; Now by locking cylinder 6, vertical slipper 8 is locked.
The extruding die cavity of openable crank extrusion device is preheated to 300 ~ 350 DEG C, by vertical cylinder 3 by vertical slipper 8 jack-up, drive two cross sliding clock 7 oppositely movements, make two limit moulds 10 separately, extruding die cavity is in open, the square blank heated is put into extruding die cavity;
Make vertical cylinder 3 backhaul, by horizontal cylinder 9, cross sliding clock 7 level is ejected, two limit moulds 10 are drawn close mutually to clamping square blank, by locking cylinder 6, vertical slipper 8 is locked with fixed press die cavity; Compacting patrix is put into extruding die cavity;
3rd step, adopts openable crank extrusion device to extrude square blank;
The openable crank extrusion device that square blank is housed is placed on travelling table, and by travelling table, openable crank extrusion device is moved into hydraulic press, by hydraulic press, compacting patrix is depressed, make square blank be pressed in bed die 11, until blank is full of extruding die cavity;
As shown in Figure 8, because the bottom of compacting patrix is arc, in compacting process, by the restriction of mold shape, crank throw upper arm end is pressed into arc, simultaneously crank cotter pin also one-shot forming, thus greatly can improve mechanical performance, reduce machine-finish allowance, improve the utilization rate of material.
4th step, forms radius bar;
By travelling table, openable crank extrusion device is shifted out hydraulic press, hang out compacting patrix, and stamping knife is connected with press; By travelling table, openable crank extrusion device is moved into hydraulic press, by hydraulic press, stamping knife is depressed, make press depress the degree of depth backed off after random stamping knife of regulation, thus form two radius bars, form the workpiece as shown in Figure 11, Figure 12;
5th step, unclamps locking cylinder 6, by vertical cylinder 3 by vertical slipper 8 jack-up, drives two limit moulds 10 to be separated, hangs out workpiece;
6th step, makes workpiece enter furnace treatment reason.
The present invention can produce the crankshaft used for large boat crank throw of various type.
Claims (6)
1. an openable crank extrusion device, it is characterized in that, described openable crank extrusion device comprises crossbeam, column, vertical slipper, linkage, cross sliding clock, and the both sides of base plate are respectively arranged with crossbeam, is fixedly connected with between two crossbeams by many root posts; The inner side articulated vertical slide block of crossbeam, vertical slipper is flexibly connected with cross sliding clock by linkage; Cross sliding clock fillet mould, the base plate between two limit moulds is fixedly installed bed die, and two limit moulds and bed die form and extrude die cavity; The bottom of described vertical slipper connects vertical cylinder, and the outside of described cross sliding clock is by horizontal cylinder connecting cross beam; The side of described vertical slipper is provided with locking cylinder.
2. openable crank extrusion device according to claim 1, is characterized in that, described crossbeam is connected by track with between base plate.
3. openable crank extrusion device according to claim 1, is characterized in that, described base plate is provided with positioner, for base plate is fixed on travelling table.
4. openable crank extrusion device according to claim 1, is characterized in that, described cross sliding clock connects column by guided way.
5. the openable crank extrusion device according to claim 1 or 4, is characterized in that, described vertical slipper is flexibly connected with crossbeam by gathering sill.
6. a manufacturing process for crankshaft used for large boat crank throw, is characterized in that, adopts openable crank extrusion device according to claim 1, being not less than the crankshaft used for large boat crank throw of 700mm × 1000mm × 2000mm, comprising the following steps for forging overall dimensions:
The first step, base; Steel ingot is pressed into square blank;
Second step, is placed in openable crank extrusion device by square blank;
The extruding die cavity of openable crank extrusion device is preheated to 300 ~ 350 DEG C, makes two limit moulds separately, extruding die cavity is in open, the square blank heated is put into extruding die cavity;
Two limit moulds are made mutually to draw close to clamping square blank, fixed press die cavity; Compacting patrix is put into extruding die cavity;
3rd step, adopts openable crank extrusion device to extrude square blank;
The openable crank extrusion device that square blank is housed is placed on travelling table, and by travelling table, openable crank extrusion device is moved into hydraulic press, by hydraulic press, compacting patrix is depressed, make square blank be pressed in bed die, until blank is full of extruding die cavity;
4th step, forms radius bar;
By travelling table, openable crank extrusion device is shifted out hydraulic press, hang out compacting patrix, and stamping knife is connected with hydraulic press; By travelling table, openable crank extrusion device is moved into hydraulic press, by hydraulic press, stamping knife is depressed, make hydraulic press depress the degree of depth backed off after random stamping knife of regulation, thus form two radius bars;
5th step, drives two limit moulds to be separated, hangs out workpiece;
6th step, makes workpiece enter furnace treatment reason.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110360068.7A CN103100570B (en) | 2011-11-14 | 2011-11-14 | Openable crank extrusion device and forming method of large marine crankshaft crank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110360068.7A CN103100570B (en) | 2011-11-14 | 2011-11-14 | Openable crank extrusion device and forming method of large marine crankshaft crank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103100570A CN103100570A (en) | 2013-05-15 |
| CN103100570B true CN103100570B (en) | 2015-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110360068.7A Expired - Fee Related CN103100570B (en) | 2011-11-14 | 2011-11-14 | Openable crank extrusion device and forming method of large marine crankshaft crank |
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| CN (1) | CN103100570B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109201997A (en) * | 2017-07-03 | 2019-01-15 | 上海昌强重工机械有限公司 | The processing mold and its processing technology of large-scale built-up crankshaft crank peculiar to vessel |
| CN109530605A (en) * | 2018-11-28 | 2019-03-29 | 上海电气上重铸锻有限公司 | A kind of large size crank throw forging apparatus and forging method |
| CN110695110B (en) * | 2019-09-30 | 2020-12-29 | 上海电机学院 | Crank extrusion forming device easy to demould and crank extrusion forming method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1283386C (en) * | 2004-09-09 | 2006-11-08 | 武汉重工铸锻有限责任公司 | Process and apparatus for producing large diesel engine crank axle and crank for ship |
| CN100415408C (en) * | 2006-11-01 | 2008-09-03 | 中国科学院金属研究所 | Equipment for bend-forging crank axle toggle of large ship and method for forging the same |
| CN100560246C (en) * | 2007-10-19 | 2009-11-18 | 中国科学院金属研究所 | Universal combined crankshaft used for large boat crank throw curved forging counterdie and method for designing |
| JP2009208147A (en) * | 2008-03-06 | 2009-09-17 | Nissan Motor Co Ltd | Method for manufacturing crankshaft and forming die used therefor |
| JP5240467B2 (en) * | 2009-03-18 | 2013-07-17 | トヨタ自動車株式会社 | Press forming method |
| CN102189212A (en) * | 2011-03-15 | 2011-09-21 | 燕山大学 | Large-scale crank shaft bending forging die |
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2011
- 2011-11-14 CN CN201110360068.7A patent/CN103100570B/en not_active Expired - Fee Related
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