CN106563762A - Pre-joggling process for full-fiber crankshaft upsetting - Google Patents

Pre-joggling process for full-fiber crankshaft upsetting Download PDF

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Publication number
CN106563762A
CN106563762A CN201610750769.4A CN201610750769A CN106563762A CN 106563762 A CN106563762 A CN 106563762A CN 201610750769 A CN201610750769 A CN 201610750769A CN 106563762 A CN106563762 A CN 106563762A
Authority
CN
China
Prior art keywords
upsetting
crankshaft
shaft
joggling
bent axle
Prior art date
Application number
CN201610750769.4A
Other languages
Chinese (zh)
Inventor
陈国遂
苏涛
张承峰
吴红伟
罗祖义
Original Assignee
武汉重工铸锻有限责任公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 武汉重工铸锻有限责任公司 filed Critical 武汉重工铸锻有限责任公司
Priority to CN201610750769.4A priority Critical patent/CN106563762A/en
Publication of CN106563762A publication Critical patent/CN106563762A/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/02Die forging; Trimming by making use of special dies ; Punching during forging
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/08Upsetting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21KMAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00Making machine elements
    • B21K1/06Making machine elements axles or shafts
    • B21K1/08Making machine elements axles or shafts crankshafts

Abstract

The invention relates to a pre-joggling process for full-fiber crankshaft upsetting. The pre-joggling process for full-fiber crankshaft upsetting includes the steps: prefabricating a crankshaft step shaft; heating a crank arm, a crank pin and a main journal of the crankshaft step shaft to a processing temperature; after heating, placing the crank arm, the crank pin and the main journal of the crankshaft step shaft in a cavity of a pre-joggling die, wherein left and right working modules horizontally moves and performs joggling on the crankshaft step shaft, and the a pre-joggling die restricts the blank material metal of the crankshaft step shaft to flow downward so as to aggregate the metal upward, and an upper punch presses down to control the crank pin of the crankshaft to be not joggled; and when an upper beam of the pre-joggling die contacts a stopper and the upper punch moves downward from the center of the cavity of the upper punch to coincide with the center of the die, pre-joggling is over. The crankshaft accepts pre-joggling by means of the crankshaft step shaft manufactured by the pre-joggling process, and then is molded through the full-fiber forging method can fill the cavity of the die, so as to avoid defects, such as unfilled corner, misrun and folding, appearing in part of the crankshaft, to get high full fiber rate of the crankshaft and to satisfy the overall processing demand. Besides, the subsequent processing allowance is small; the utilization rate of materials is high; and the cost is low.

Description

The process of pre-upsetting of full-fibre crankshaft upsetting
Technical field
The invention belongs to bent axle upsetting field, and in particular to a kind of process of pre-upsetting of full-fibre crankshaft upsetting.
Background technology
The stroke of currently advanced crankshaft of diesel engine design is with cylinder diameter than greatly, profile of cranking arm is ellipse, complete using TR methods Shaping difficulty of cranking arm during fiber upsetting is big, easily produces underfill of cranking arm, and bent axle is cranked arm balance weight installation when causing following process The corner surplus in face is inadequate.
Conventional forging technique of full fiber is generally cranked arm and is difficult to fill out using the method for increasing forging process surplus, i.e. increase bent axle The allowance at the position being full of, the forging surplus of this kind of manufacture is big, and stock utilization is low, and following process surplus is big, week Phase is long, and machining causes Whole fiber rate to reduce, and bent axle overall mechanical properties are reduced.
The content of the invention
The purpose of the present invention is for above-mentioned present situation, it is desirable to provide a kind of Whole fiber rate is high, following process surplus is few, material Utilization rate is high, the process of pre-upsetting of the full-fibre crankshaft upsetting of low cost.
The implementation of the object of the invention is that the process of pre-upsetting of full-fibre crankshaft upsetting is comprised the following steps that:
1) bent axle Step Shaft is prepared using forging, metal cutting process mode;
2) by Jing steps 1) the cranking arm of ready bent axle Step Shaft, crank-pin, trunnion are heated to technological temperature;
3) by Jing steps 2) the bent axle Step Shaft that heats is placed in the die cavity of mould of pre-upsetting;
4) the left and right operational module by pre-upsetting in mould moves horizontally jumping-up bent axle Step Shaft, pre-upset die and song Axle Step Shaft lower half circle is contacted, and is limited blank metal and is flowed downward, and blank metal is assembled upwards, while upper punch is pushed, control The crank-pin of yeast production axle is not upset;
5) upper beam of mould of making to pre-upset touches the limited block of mould of pre-upsetting, the die cavity center of upper punch come downwards to Pre-upset mold center overlap when, end of pre-upsetting;
6) by Jing step 5) pre-upset after bent axle Step Shaft, through all fiber forging method shape full-fibre crankshaft.
Using the present invention, after bent axle Step Shaft is pre-upset, then through all fiber forging method shaping bent axle can be filled with it is pre- Heading die die cavity, Whole fiber rate is high;Avoid bent axle local and the defects such as unfilled corner, misrun, folding, following process surplus occur It is few, raw material has been saved, stock utilization is high;The manufacturing cycle is shortened, manufacturing cost is reduced;Can guarantee that the whole of metallic fiber Body seriality, meets overall processing requirement.
Description of the drawings
Fig. 1 is the crankshaft structure schematic diagram of present invention manufacture,
Fig. 2 is the bent axle Step Shaft structural representation for preparing to pre-upset,
Fig. 3 is the crankshaft structure schematic diagram after pre-upsetting,
Fig. 4 pre-upsets forging molding state diagram for bent axle.
Specific embodiment
With reference to Fig. 1, the bent axle of present invention manufacture is cranked arm 1, crank-pin 2, trunnion 3, balance weight mounting surface 4 of cranking arm.It is bent The forging molding of corner 5 of arm balance weight mounting surface 4 is difficult.
Bent axle Step Shaft is pre-upset (as shown in Figure 4) using the present invention, bent axle Step Shaft pre-upset after (such as Fig. 3 It is shown), then can be filled with mold cavity of pre-upsetting through the bent axle of all fiber forging method shaping, it is to avoid lacking occurs in bent axle local The defects such as angle, misrun, folding, following process surplus is few, has saved raw material;The manufacturing cycle is shortened, manufacturing cost is reduced; Can guarantee that the overall seriality of metallic fiber.
The specific embodiment of the present invention:
1) preform:Bent axle Step Shaft is prepared using forging, metal cutting process mode, bent axle Step Shaft cranks arm 1, Crank-pin 2, trunnion 3 (see Fig. 2);
2) by Jing steps 1) the 1, crank-pin 2 of cranking arm of ready bent axle Step Shaft, trunnion 3 be heated to technological temperature;
3) by Jing steps 2) the bent axle Step Shaft that heats is placed in the die cavity of die 7 of pre-upsetting;
The die cavity of the die of pre-upsetting is semi-circular structure, is contacted with the lower half circle of bent axle Step Shaft;Pre-upset die Die cavity internal diameter is 1.015 times of the external diameter of bent axle Step Shaft.
4) the left and right operational module 6 of mould of pre-upsetting clamps bent axle Step Shaft trunnion 3, and the level of left and right operational module 6 is moved Dynamic jumping-up bent axle Step Shaft.Pre-upset mould die 7 of pre-upsetting withstand bent axle Step Shaft crank arm 1 and crank-pin 2 lower half Circle, limits bent axle Step Shaft metal and flows downward, and metal is assembled upwards.Pre-upset mould upper punch 8 be arranged on pre-upset On the upper beam 9 of mould, upper punch 8 is pressed downward with upper beam 9, and the trunnion 3 for controlling bent axle is not upset (see Fig. 4);
The die cavity internal diameter of the upper punch of the mould of pre-upsetting is 1.015 times of the crank-pin external diameter of bent axle;Upper punch Thickness is 1.015 times of the crank-pin length of bent axle.
The horizontal displacement of the left and right operational module and the vertical displacement amount of upper punch are l* (cos α1-cosα2) cosine With l* (sin α1-sinα2) sinusoidal variation.
Translational speed vertically downward of the horizontal jumping-up translational speed of the left and right operational module 6 more than upper punch.
5) lower plane of upper beam 9 of mould of making to pre-upset touches the limited block 10 of mould of pre-upsetting, in the die cavity of upper punch The heart is come downwards to when overlapping with mold center of pre-upsetting, end of pre-upsetting;
6) by Jing step 5) pre-upset after bent axle Step Shaft (see Fig. 3), through all fiber forging method shape bent axle.

Claims (5)

1. the process of pre-upsetting of full-fibre crankshaft upsetting, it is characterised in that:Comprise the following steps that:
1) bent axle Step Shaft is prepared using forging, metal cutting process mode;
2) by Jing steps 1) the cranking arm of ready bent axle Step Shaft, crank-pin, trunnion are heated to technological temperature;
3) by Jing steps 2) the bent axle Step Shaft that heats is placed in the die cavity of mould of pre-upsetting;
4) the left and right operational module by pre-upsetting in mould moves horizontally jumping-up bent axle Step Shaft, pre-upset die and bent axle platform Rank axle lower half circle is contacted, and is limited blank metal and is flowed downward, and blank metal is assembled upwards, while upper punch is pushed, control is bent The crank-pin of axle is not upset;
5) upper beam of mould of making to pre-upset touches the limited block of mould of pre-upsetting, and the die cavity center of upper punch comes downwards to and pre- upsetting During roughcast tool center superposition, end of pre-upsetting;
6) by Jing step 5) pre-upset after bent axle Step Shaft, through all fiber forging method shape full-fibre crankshaft.
2. the full-fibre crankshaft upsetting method of formula of pre-upsetting according to claim 1, it is characterised in that:Pre-upset die Die cavity is semi-circular structure, is contacted with the lower half circle of Step Shaft;Pre-upset die die cavity internal diameter be Step Shaft external diameter 1.015 Times.
3. the full-fibre crankshaft upsetting method of formula of pre-upsetting according to claim 1, it is characterised in that:The mould of pre-upsetting The die cavity internal diameter of the upper punch of tool is 1.015 times of the crank-pin external diameter of bent axle;The thickness of upper punch is that the crank-pin of bent axle is long 1.015 times of degree.
4. the full-fibre crankshaft upsetting method of formula of pre-upsetting according to claim 1, it is characterised in that:The left and right work The vertical displacement amount of the horizontal displacement and upper punch of making module is l* (cos α1-cosα2) cosine and l* (sin α1-sinα2) just Chord curve changes.
5. the process of pre-upsetting of the crankshaft forging stated according to claim 1, it is characterised in that:The left and right operational module Horizontal jumping-up translational speed more than upper punch translational speed vertically downward.
CN201610750769.4A 2016-08-29 2016-08-29 Pre-joggling process for full-fiber crankshaft upsetting CN106563762A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610750769.4A CN106563762A (en) 2016-08-29 2016-08-29 Pre-joggling process for full-fiber crankshaft upsetting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610750769.4A CN106563762A (en) 2016-08-29 2016-08-29 Pre-joggling process for full-fiber crankshaft upsetting

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CN106563762A true CN106563762A (en) 2017-04-19

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110405124A (en) * 2019-08-05 2019-11-05 通裕重工股份有限公司 Marine full-fibre crankshaft upsetting manufacturing process and its forming device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3603660B2 (en) * 1999-04-20 2004-12-22 住友金属工業株式会社 Method of manufacturing forged wasteland and integrated crankshaft
CN102744356A (en) * 2012-07-23 2012-10-24 南车资阳机车有限公司 Full-fiber bending-upsetting method for crank shaft
CN202762932U (en) * 2012-09-05 2013-03-06 南车资阳机车有限公司 Single-cylinder gasoline/ diesel engine bent-axle all-fiber upsetting device
CN103586390A (en) * 2013-10-28 2014-02-19 中国兵器工业第五九研究所 Full-fiber forming method for automotive crankshaft

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3603660B2 (en) * 1999-04-20 2004-12-22 住友金属工業株式会社 Method of manufacturing forged wasteland and integrated crankshaft
CN102744356A (en) * 2012-07-23 2012-10-24 南车资阳机车有限公司 Full-fiber bending-upsetting method for crank shaft
CN202762932U (en) * 2012-09-05 2013-03-06 南车资阳机车有限公司 Single-cylinder gasoline/ diesel engine bent-axle all-fiber upsetting device
CN103586390A (en) * 2013-10-28 2014-02-19 中国兵器工业第五九研究所 Full-fiber forming method for automotive crankshaft

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110405124A (en) * 2019-08-05 2019-11-05 通裕重工股份有限公司 Marine full-fibre crankshaft upsetting manufacturing process and its forming device

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Application publication date: 20170419