CN105033143A - Crankshaft pre-forging die for general gasoline engine and forging method for crankshaft of general gasoline engine - Google Patents
Crankshaft pre-forging die for general gasoline engine and forging method for crankshaft of general gasoline engine Download PDFInfo
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- CN105033143A CN105033143A CN201510421174.XA CN201510421174A CN105033143A CN 105033143 A CN105033143 A CN 105033143A CN 201510421174 A CN201510421174 A CN 201510421174A CN 105033143 A CN105033143 A CN 105033143A
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Abstract
Provided are a crankshaft pre-forging die for a general gasoline engine and a crankshaft forging method. The pre-forging die comprises an upper die and a lower die, the upper die and the lower die are provided with an upper die cavity and a lower die cavity which form a pre-forging cavity after the upper die and the lower die close, the edge of the upper die cavity is provided with a resistance retaining wall, and the edge of the lower die cavity is provided with a material resisting platform matched with the resistance retaining wall when casting is conducted; the die forging method using the pre-forging die comprises the steps that blanking is conducted, and a blank is heated; pre-forging is conducted on the blank through the pre-forging die, a pre-forged workpiece is obtained, and finish-forging is conducted on the pre-forged workpiece obtained through pre-forging in a finish-forging die of a second main engine to obtain a finish-forged workpiece; hot trimming is conducted on the finish-forged workpiece obtained through finish-forging to obtain a forged workpiece of a crankshaft of the general gasoline engine. By means of the pre-forging die, the steps of the forging process are greatly simplified, the manpower and the blanks are saved, and therefore the cost is greatly reduced; the obtained pre-forged workpiece is reliable in quality, and the yield is high.
Description
Technical field
The present invention relates to metal material plastic forming technology field, especially a kind of Preform Die for forging General purpose petrol engine crankshaft and bent axle die forging method.
Background technology
Bent axle is one of key components and parts on motorcycle gasoline engine, and the quality of its performance directly affects quality and the life-span of engine.
As the counterdie top view that Fig. 3 is existing crankshaft forging mold.This mould is used to carry out blocking and finish-forging.Its forging is carried out in accordance with the following steps:
Step 1, blanking, is heated to blocking temperature;
Step 2, jumping-up, by jumping-up in the middle part of blank;
Step 3, pulls out the short end of the blank of jumping-up;
Step 4, then the long end of blank is pulled out;
Step 5, uses the blocking die cavity (7) of mould as shown in Figure 3 by blank blocker forging;
Step 6, the blank that blocking obtains is placed in finish-forging die cavity (8) forging molding;
Step 7, the Crank Blank blanking that finish-forging is obtained carries out hot trimming process, obtains forging finished product.
Use existing forging mold to forge logical machine crankshaft, step has seven steps, at least needs eight workmans in pile line operation, inefficiency; Use forging mold as shown in Figure 3, blocking wastes a large amount of materials, causes cost higher.
Summary of the invention
For above-mentioned the deficiencies in the prior art, the technical problem to be solved in the present invention is to provide a kind of General purpose petrol engine crankshaft Preform Die and forging method, this Preform Die makes forging process step greatly simplify, save manpower and blank, thus greatly reduce costs, and obtained blocking workpiece quality is reliable, yield rate is high.
In order to solve the problems of the technologies described above, in the present invention, have employed following technical scheme:
A kind of General purpose petrol engine crankshaft Preform Die, comprise upper die and lower die, upper model cavity and the counterdie die cavity of blocking die cavity is formed after these upper die and lower die are respectively arranged with described upper die and lower die matched moulds, the edge of described upper model cavity is provided with resistance barricade, the resistance material platform coordinated with described resistance barricade when the edge of described counterdie die cavity is provided with casting.
Described resistance barricade is an end to end closed boss structure, and this boss structure exceeds described patrix surface.
The height of described resistance barricade is 10mm to 30mm, and the width of this resistance barricade is 15mm to 30mm.
Described resistance barricade and described patrix are structure as a whole.
The shape of described resistance material platform is consistent with described resistance barricade top shape.
The outer side edges of the resistance material platform of described counterdie is along being provided with at least three pieces of blocks, and this block and described counterdie are structure as a whole.
A kind of crankshaft forging method, is characterized in that, use above-mentioned Preform Die to carry out blocking, specifically carry out as follows:
Step 1, blanking, according to the size of bent axle, cuts the blank of respective diameters with cutter sweep, obtain the blank meeting technological requirement length, heat, make its temperature reach 1000 to 1150 degrees Celsius to blank;
Step 2, blocking, uses described Preform Die to carry out blocking to blank, obtained blocking workpiece, and parting pickup, is ejected blocking workpiece by the hole that ejects on counterdie 2;
Step 3, finish-forging, the blocking workpiece obtained by blocking carries out finish-forging in finish-forging die, parting pickup, obtained finish-forging workpiece;
Step 4, hot trimming, carries out hot trimming to the finish-forging workpiece that finish-forging obtains, and obtains the forging workpiece of General purpose petrol engine crankshaft.
Described blank is cylinder blank, and after this blank heating, the horizontal die shoe at described Preform Die carries out blocking.
Excellent technique effect of the present invention compared with prior art:
During forging, blocking adopts this mould, after heating in blanking, directly uses this mould to carry out blocking, ejects workpiece, carry out finish-forging at finish-forging die after blocking terminates, and the workpiece obtained finish-forging carries out hot trimming and obtains forging finished product.Blocking adopts the mould of this invention, the edge of the upper model cavity of patrix is provided with resistance barricade, when carrying out blocking, resistance barricade sidewall is exerted pressure, make the blank after heating towards blocking cavity filling, filling effect is good, therefore omits of the prior art by jumping-up in the middle part of blank, the short end of the blank of jumping-up is pulled out, with three steps long end of blank pulled out, direct blocking can obtain filling good blocking workpiece reliably.This makes forging process step greatly simplify, and enhances productivity, and saves human cost.
Pull out owing to not needing jumping-up blank two ends and carry out base, avoid the generation of underproof base, improve utilization rate of raw materials, save material.
The resistance barricade effect that patrix is arranged, makes the blank after heating towards blocking cavity filling, reduces the size of the overlap of generation, save blank, reduce production cost, also make the yield rate of workpiece and product quality significantly improve simultaneously.
Accompanying drawing explanation
Fig. 1 is upper die structure schematic diagram of the present invention;
Fig. 2 is lower die structure schematic diagram of the present invention;
Fig. 3 is the top view of existing crankshaft forging mold.
Detailed description of the invention
Below in conjunction with detailed description of the invention and accompanying drawing, the present invention is described in further detail.
During concrete enforcement, as depicted in figs. 1 and 2, General purpose petrol engine crankshaft Preform Die, comprise patrix 1 and counterdie 2, form upper model cavity and the counterdie die cavity of blocking die cavity after patrix 1 and counterdie 2 are respectively arranged with patrix 1 and the 2-in-1 mould of counterdie, be wherein provided with the resistance barricade 3 be structure as a whole with patrix 1 at the edge of upper model cavity, this resistance barricade 3 is an end to end closed boss structure, the height of this resistance barricade 3 is 10mm to 30mm, and width is 15mm to 30mm.
As shown in Figure 2, the resistance material platform 4 coordinated with resistance barricade 3 when the drag cavity edge of counterdie 2 is provided with casting, the shape of this resistance material platform 4 is consistent with described resistance barricade 3 top shape.The outer side edges of resistance material platform 4 is along being provided with the three pieces of blocks 5 be structure as a whole with counterdie 2.
The Preform Die of this General purpose petrol engine crankshaft is used for the blocking of bent axle, and crankshaft forging method is carried out in accordance with the following steps:
Step 1, blanking, according to the size of bent axle, cuts the blank of respective diameters with cutter sweep, obtain the blank meeting technological requirement length, heat, make its temperature reach 1000 to 1150 degrees Celsius to blank;
Step 2, blocking, on First main frame, uses described Preform Die to carry out blocking to blank, obtained blocking workpiece, and parting pickup, is ejected blocking workpiece by the hole 6 that ejects on counterdie 2;
Step 3, finish-forging, the blocking workpiece obtained by blocking carries out finish-forging in the finish-forging die of second main frame, parting pickup, obtained finish-forging workpiece;
Step 4, hot trimming, carries out hot trimming to the finish-forging workpiece that finish-forging obtains, and obtains the forging workpiece of General purpose petrol engine crankshaft.
When carrying out blocking, resistance barricade 3 sidewall is exerted pressure in blocking die cavity, make the blank after heating towards blocking cavity filling, when blocking, because the pressure of resistance barricade 3 sidewall is huge, make the filling effect of blank in blocking die cavity good, therefore omit of the prior art by jumping-up in the middle part of blank, the short end of the blank of jumping-up is pulled out, and three steps that the long end of blank is pulled out.After blanking heating, directly use this Preform Die to carry out blocking and can obtain filling good blocking workpiece reliably, the forging process step of bent axle simplifies greatly, saves human cost.Preform Die before adopting, produces finished product needs close to the time of 30 seconds, adopts Preform Die of the present invention, the production time of single product can be foreshortened to tens seconds, significantly enhance productivity.
According to the die forging method of this invention, operator's number of production line reduces to 4 present people by former 8 people, significantly reduces human cost.
Use this Preform Die blocking, do not need jumping-up blank two ends to pull out and carry out base, avoid the generation of underproof base, improve utilization rate of raw materials, save material.
The resistance barricade 3 arranged due to patrix acts on, and make the blank after heating towards blocking cavity filling, with prior art ratio, overlap reduces greatly, saves blank, reduces production cost.Due to the effect of exerting pressure of resistance barricade 3, blank filling effect is good, and the yield rate of workpiece and product quality are significantly improved.Through overtesting, use this Preform Die, single blank has saved more than 14% than the blank used in prior art.
The outer side edges of the resistance material platform 4 of counterdie 2, along the three pieces of blocks 5 arranged, makes the registration of upper die and lower die during blocking high, is convenient to the accuracy improving blocking workpiece.
Above content is in conjunction with concrete preferred embodiment further description made for the present invention; the Preform Die of this invention is not limited to blocking and leads to machine crankshaft; to those of ordinary skill in the art; can also make again and suitably deduce and improve; but under not departing from the present invention and constructing the prerequisite of thinking, all should be included in protection scope of the present invention.
Claims (8)
1. a General purpose petrol engine crankshaft Preform Die, comprise patrix (1) and counterdie (2), upper model cavity and the counterdie die cavity of blocking die cavity is formed after this patrix (1) and counterdie (2) are respectively arranged with described patrix (1) and counterdie (2) matched moulds, it is characterized in that, the edge of described upper model cavity is provided with resistance barricade (3), the resistance material platform (4) coordinated with described resistance barricade (3) when the edge of described counterdie die cavity is provided with casting.
2. General purpose petrol engine crankshaft Preform Die according to claim 1, is characterized in that, described resistance barricade (3) is an end to end closed boss structure, and this boss structure exceeds described patrix (1) surface.
3. General purpose petrol engine crankshaft Preform Die according to claim 1, is characterized in that, the height of described resistance barricade (3) is 10mm to 30mm, and the width of this resistance barricade (3) is 15mm at least 30mm.
4. General purpose petrol engine crankshaft Preform Die according to claim 1, is characterized in that, described resistance barricade (3) and described patrix (1) are structure as a whole.
5. the General purpose petrol engine crankshaft Preform Die according to claim 1 or 2 or 3, is characterized in that, the shape of described resistance material platform (4) is consistent with described resistance barricade (3) top shape.
6. General purpose petrol engine crankshaft Preform Die according to claim 5, is characterized in that, the outer side edges of the resistance material platform (4) of described counterdie (2) is along being provided with at least three pieces of blocks (5), and this block (5) and described counterdie (2) are structure as a whole.
7. a crankshaft forging method, is characterized in that, carries out blocking based on Preform Die, specifically carries out as follows:
Step 1, blanking, according to the size of bent axle, cuts the blank of respective diameters with cutter sweep, obtain the blank meeting technological requirement length, heat, make its temperature reach 1000 to 1150 degrees Celsius to blank;
Step 2, blocking, uses described Preform Die to carry out blocking to blank, obtained blocking workpiece, and parting pickup, is ejected blocking workpiece by the hole (6) that ejects on counterdie 2;
Step 3, finish-forging, the blocking workpiece obtained by blocking carries out finish-forging in finish-forging die, parting pickup, obtained finish-forging workpiece;
Step 4, hot trimming, carries out hot trimming to the finish-forging workpiece that finish-forging obtains, and obtains the forging workpiece of General purpose petrol engine crankshaft.
8. crankshaft forging method according to claim 7, is characterized in that, described blank is cylinder blank, and after this blank heating, the horizontal die shoe at described Preform Die carries out blocking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510421174.XA CN105033143A (en) | 2015-07-17 | 2015-07-17 | Crankshaft pre-forging die for general gasoline engine and forging method for crankshaft of general gasoline engine |
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| CN201510421174.XA CN105033143A (en) | 2015-07-17 | 2015-07-17 | Crankshaft pre-forging die for general gasoline engine and forging method for crankshaft of general gasoline engine |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104874713A (en) * | 2015-04-24 | 2015-09-02 | 浙江正昌锻造股份有限公司 | Continuous composite molding technique for oil injectors |
| CN106270356A (en) * | 2016-08-02 | 2017-01-04 | 盐城市鑫海机械有限公司 | A kind of processing method of hay mover eccentric crankshaft |
| CN106734840A (en) * | 2016-12-21 | 2017-05-31 | 怀宁县群力汽车配件有限公司 | A kind of crankshaft forging device and method |
| CN110773961A (en) * | 2019-11-06 | 2020-02-11 | 无锡宏达重工股份有限公司 | Machining method of speed ratio wheel |
| CN110802195A (en) * | 2019-10-15 | 2020-02-18 | 济南鑫伟锻造有限公司 | Forging process of crankshaft |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004322137A (en) * | 2003-04-23 | 2004-11-18 | Nissan Motor Co Ltd | Method and die for forging crankshaft |
| CN101091978A (en) * | 2007-07-18 | 2007-12-26 | 山东大学 | New technique for forging bracket of back axle of automobile |
| CN201609749U (en) * | 2010-03-19 | 2010-10-20 | 重庆杰信模具有限公司 | Crankshaft forging mold |
| CN201693113U (en) * | 2010-05-14 | 2011-01-05 | 湖北巨力锻造有限公司 | Cylinder bracket forging die |
| CN101947625A (en) * | 2010-09-10 | 2011-01-19 | 西南大学 | Forging die for manufacturing high-precision micro-vehicle crank shafts and manufacturing method thereof |
| CN204892837U (en) * | 2015-07-17 | 2015-12-23 | 重庆众诚精密模锻有限公司 | General gasoline engine bent axle pre forging die |
-
2015
- 2015-07-17 CN CN201510421174.XA patent/CN105033143A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004322137A (en) * | 2003-04-23 | 2004-11-18 | Nissan Motor Co Ltd | Method and die for forging crankshaft |
| CN101091978A (en) * | 2007-07-18 | 2007-12-26 | 山东大学 | New technique for forging bracket of back axle of automobile |
| CN201609749U (en) * | 2010-03-19 | 2010-10-20 | 重庆杰信模具有限公司 | Crankshaft forging mold |
| CN201693113U (en) * | 2010-05-14 | 2011-01-05 | 湖北巨力锻造有限公司 | Cylinder bracket forging die |
| CN101947625A (en) * | 2010-09-10 | 2011-01-19 | 西南大学 | Forging die for manufacturing high-precision micro-vehicle crank shafts and manufacturing method thereof |
| CN204892837U (en) * | 2015-07-17 | 2015-12-23 | 重庆众诚精密模锻有限公司 | General gasoline engine bent axle pre forging die |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104874713A (en) * | 2015-04-24 | 2015-09-02 | 浙江正昌锻造股份有限公司 | Continuous composite molding technique for oil injectors |
| CN106270356A (en) * | 2016-08-02 | 2017-01-04 | 盐城市鑫海机械有限公司 | A kind of processing method of hay mover eccentric crankshaft |
| CN106734840A (en) * | 2016-12-21 | 2017-05-31 | 怀宁县群力汽车配件有限公司 | A kind of crankshaft forging device and method |
| CN110802195A (en) * | 2019-10-15 | 2020-02-18 | 济南鑫伟锻造有限公司 | Forging process of crankshaft |
| CN110773961A (en) * | 2019-11-06 | 2020-02-11 | 无锡宏达重工股份有限公司 | Machining method of speed ratio wheel |
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Application publication date: 20151111 |