CN202490909U - Bending die-forging finishing mold for crank blank of low-speed diesel engine - Google Patents

Bending die-forging finishing mold for crank blank of low-speed diesel engine Download PDF

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Publication number
CN202490909U
CN202490909U CN2011205718674U CN201120571867U CN202490909U CN 202490909 U CN202490909 U CN 202490909U CN 2011205718674 U CN2011205718674 U CN 2011205718674U CN 201120571867 U CN201120571867 U CN 201120571867U CN 202490909 U CN202490909 U CN 202490909U
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CN
China
Prior art keywords
crank
finishing
diesel engine
forging
low
Prior art date
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.)
Expired - Lifetime
Application number
CN2011205718674U
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Chinese (zh)
Inventor
黄永强
熊武
刘长安
谭大伟
陈国红
张承峰
黄丽秋
张进军
刘峰
丁韬
刘振新
邹泉
蔡洪平
金迎松
刘秀环
郭鹏程
殷威龙
于海娟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan Heavy Industry Casting and Forging Co Ltd
Original Assignee
Wuhan Heavy Industry Casting and Forging Co Ltd
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.)
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Application filed by Wuhan Heavy Industry Casting and Forging Co Ltd filed Critical Wuhan Heavy Industry Casting and Forging Co Ltd
Priority to CN2011205718674U priority Critical patent/CN202490909U/en
Application granted granted Critical
Publication of CN202490909U publication Critical patent/CN202490909U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model relates to a bending die-forging finishing mold for a crank blank of a low-speed diesel engine. A production method of the mold is as follows: a crank finishing blank molded by an 8000T oil press is processed according to this molding method as follows in combination with a molding dedicated tool: the crank completely passes through two rollers under squeezing of a stamping plate so that the finishing blank of the crank is bent and deformed; in this way, the arm of the crank and the crank opening dimension both meet the technological requirements; compared with the traditional method, the molding method is capable of ensuring cranking opening and whole fibers of the arm of the crank, and simultaneously avoiding secondary forging during die forging and striving to complete forging through one step; therefore, the circulation time of product in the production process is reduced; in the mean time, opening folding during bending is also avoided, the production cost is reduced, the inherent quality of the crank is improved and the requirements of designer on product are met.

Description

Low-speed diesel engine crank blank is bent the die forging finishing mold
Technical field
The utility model relates to the crooked hot forging mould of a kind of roll that utilizes moulding mould special to forge the low-speed diesel engine crank.
Background technology
Crank is the important component part of bent axle.According to semi-built-up low-speed diesel engine crankshaft designs require the low-speed diesel engine crank open shelves must with the connecting lever forging molding of crank, it is continuous with the fiber of connecting lever to make pipe open shelves; This just requires the shaping of low-speed diesel engine crank not open the method moulding of turning through previous machined.Utilize the low-speed diesel engine crank of produced in conventional processes, it opens the mode that turns is through machined, and difficult quality satisfies the complicated applying working condition requirement of crank.
At present, the method for producing the low-speed diesel engine crank mainly is curved forging method, secondly is block forging method, curved forging method, die forging.Each method all has its pluses and minuses, and key is also manufactured device and manufacturing process at it.
Die forging is the applicant's " large diesel engine for ship crankshaft crank manufacturing process and device " (Chinese patent 200410060819.3) and " large diesel engine for ship crankshaft crank manufacturing installation " (Chinese patent 200420076782.9) disclosed technology; It mainly is the patented technology to S60MC and the curved forging molding of the following type crank of S60MC; Basic ideas be with the crank blank of bulk through airtight die cavity, the shelves of opening of centre are utilized the punching moulding; Crank after the moulding exists that to open shelves folding, and oxide skin is piled up or the like problem, and it is very high that the finishing size of these problems affect final molding rear cranks, and there is different type of machines in this technology, shortcoming that can not be shared on the mould, frock drop into expense.
Curved forging method is with the applicant's " curved adjustable apparatus of forging large diesel engine for ship crankshaft crank forging " (Chinese patent 200620095181.1) disclosed device; Use this covering device that two of crank are cranked arm and bend to the required frock of technology to a certain degree; Mainly be to S60MC machine and the curved sad frock of forging process of the following type crank of S60MC machine; This technology does not still solve crank after the moulding and has that to open shelves folding; Problems such as oxide skin accumulation, the while can not comparatively comprehensively cover the mainstream model (the following type of S90MC machine and S90MC) of present low-speed diesel engine crank.
Shelves and connecting lever solid forging moulding are opened in new low-speed diesel engine crank designing requirement, and in forming process, how alignment makes the connecting lever of moulding comparatively even, opens a grade size and reaches designing requirement, also are unusual difficulties.
Summary of the invention
The purpose of the utility model is to above-mentioned present situation, aims to provide the curved die forging finishing mold of low-speed diesel engine crank blank that a kind of qualification rate is high, the machined expense is low, stock utilization is low.
The implementation of the utility model purpose does; Low-speed diesel engine crank blank is bent the die forging finishing mold; Two finishing supports of finishing mold have the set bolt pilot hole; There is the groove that is installed that blocks the finishing support bottom surface, have above adorn two circular arc molding pieces and four spacing controll blocks following assembling position, the gathering sill that the centre has trimming punch to move up and down; Circular arc molding piece, spacing controll block are inserted down in the assembling position, and the cambered surface of circular arc molding piece contact with the midfeather of assembling position down, and spacing controll block contacts with a following outer wall that assembles;
Trimming punch is assemblied on the special-purpose anvil block through connecting latch; Special-purpose anvil block closely is connected with the 8000T hydraulic press through jockey; Trimming punch is over against gathering sill.
Blank through behind steel-making, steel ingot jumping-up, pulling, the jumping-up is used the utility model finishing on the 8000T hydraulic press; The backward extrusion effect of the circular arc molding piece through trimming punch suppressing action and finishing mold is shaped to standard crank blank, for next step crank bending forming lays the foundation.Adopt the utility model can guarantee the full fiber of crank-pin and crank connecting lever; Secondary when breaking away from die forging again simultaneously forges; Accomplished once to accomplish to forge; Reduced the crank circulation time in process of production; Also avoid simultaneously crank opening folding, handled the machining allowance that forging is piled up, reduced to the oxide skin of opening grade position, the metallic fiber that has improved crank forged piece flows to, has improved forging flaw detection qualification rate and stock utilization.
Description of drawings
Fig. 1 is what the present invention adopted, the low-speed diesel engine crank finishing mold structural representation that assembles,
Fig. 2 a, b are structural front view, the right view of final molding crank forged piece,
Fig. 3 a, b are standard crank blank front view, right view after the finishing,
Fig. 4 is a finishing supporting structure sketch map,
Fig. 5 is a finishing supporting structure cutaway view,
Fig. 6 is that fixedly the finishing support is used the bolt nut structure sketch map,
Fig. 7 a, b are that circular arc molding block structure master looks, vertical view,
Fig. 8 a, b spacing controll block structure master look, vertical view.
The specific embodiment
With reference to Fig. 1,2; Two of the finishing mold of the utility model have set bolt pilot hole 11 like Fig. 4, the finishing support 8 shown in 5; There is the groove 9 that is installed that blocks the finishing support bottom surface; Have above adorn two circular arc molding pieces and four spacing controll blocks following assembling position 10, the gathering sill 14 that the centre has trimming punch to move up and down.Circular arc molding piece 7, spacing controll block 3 are inserted down in the assembling position 10, and the cambered surface of circular arc molding piece 7 contact with the midfeather of assembling position down, and spacing controll block 3 contacts with a following outer wall that assembles.
Trimming punch 1 is assemblied on the special-purpose anvil block 5 through connecting latch 6; Special-purpose anvil block 5 closely is connected with the 8000T hydraulic press through jockey; Trimming punch is over against gathering sill state as shown in Figure 1.
With reference to Fig. 1,4,6, set bolt 4 two ends and fixed support are through 11 assemblings of the pilot hole on the finishing support, and it cooperates is interference fits.The flange 13 and the anchor bolt nut 12 of set bolt are fastenedly connected.
When adopting the utility model finishing, the crank finishing mold is winched to below the 8000T hydraulic press; Utilize the groove 9 that is installed of finishing support that the utility model is stuck on the walking on stage of hydraulic press; And, make both be in relative balance state through adjusting the gap surplus of trimming punch and gathering sill.
Hang crank crude green body material 2 to finishing mold with driving, the projection section 15 (seeing Fig. 1,3) of blank is snapped between two circular arc molding pieces 7.
Start platform, the utility model is positioned under the hydraulic press, drive hydraulic press, hydraulic press presses down, and trimming punch presses down along gathering sill, and the crank crude green body material 2 shown in 2 in the accompanying drawing 1 is shaped to the standard crank blank 15 after the finishing shown in Fig. 3 a, the b.
The arc radius R of circular arc molding piece because of the range of choice that needs of technology is: 200mm≤R≤800mm, the radius size of used moulding roller is identical in " the low-speed diesel engine crank is bent the die-forging forming instrument " (number of patent application 2011205548391) of this size and the applicant application.Adjust the crank standard blank of two spacings between the circular arc molding piece through changing the adjustable spacing controll block of different size with finishing moulding different model.
Standard crank blank 15 shown in Figure 3 is bent through " the low-speed diesel engine crank is bent the die-forging forming instrument " and is swaged into final molding crank forged piece 16 shown in Figure 2.Two handle spacing b of final molding crank forged piece 16, the thick a of handle, the thick d of handle are with following with the relation of the thick C of handle of the thick A of handle of spacing E, bending section on spacing B, two handles under two handles of the standard crank blank 15 of the utility model finishing moulding and straightway, the thick D of handle:
1.05a≤A≤2a;0.5b≤B≤1.5b;0.5A≤C≤1.3A;0.5d≤D≤1.5d;2C≤E≤1.15(2C+B)。
Adopting the essence of the utility model is the backward extrusion effect through trimming punch suppressing action and circular arc molding piece, moulding standard crank blank.The utility model has versatility when serial crank shaping.

Claims (3)

1. low-speed diesel engine crank blank is bent the die forging finishing mold; Two finishing supports that it is characterized in that finishing mold have the set bolt pilot hole; There is the groove that is installed that blocks the finishing support bottom surface; Have above adorn two circular arc molding pieces and four spacing controll blocks following assembling position, the gathering sill that the centre has trimming punch to move up and down; Circular arc molding piece, spacing controll block are inserted down in the assembling position, and the cambered surface of circular arc molding piece contact with the midfeather of assembling position down, and spacing controll block contacts with a following outer wall that assembles;
Trimming punch is assemblied on the special-purpose anvil block through connecting latch; Special-purpose anvil block closely is connected with the 8000T hydraulic press through jockey; Trimming punch is over against gathering sill.
2. low-speed diesel engine crank blank according to claim 1 is bent the die forging finishing mold, it is characterized in that the arc radius R of circular arc molding piece is: 200mm≤R≤800mm.
3. low-speed diesel engine crank blank according to claim 1 is bent the die forging finishing mold; It is characterized in that set bolt (4) two ends and fixed support assemble through the pilot hole on the finishing support (11); It cooperates is interference fits, and flange of set bolt (13) and anchor bolt nut (12) are fastenedly connected.
CN2011205718674U 2011-12-31 2011-12-31 Bending die-forging finishing mold for crank blank of low-speed diesel engine Expired - Lifetime CN202490909U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011205718674U CN202490909U (en) 2011-12-31 2011-12-31 Bending die-forging finishing mold for crank blank of low-speed diesel engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011205718674U CN202490909U (en) 2011-12-31 2011-12-31 Bending die-forging finishing mold for crank blank of low-speed diesel engine

Publications (1)

Publication Number Publication Date
CN202490909U true CN202490909U (en) 2012-10-17

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Application Number Title Priority Date Filing Date
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105478644A (en) * 2015-12-18 2016-04-13 中冶陕压重工设备有限公司 Free forging method for Y-shaped forge piece
CN106583620A (en) * 2016-12-21 2017-04-26 中冶京诚工程技术有限公司 Crank bending forging tool and method of marine diesel engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105478644A (en) * 2015-12-18 2016-04-13 中冶陕压重工设备有限公司 Free forging method for Y-shaped forge piece
CN106583620A (en) * 2016-12-21 2017-04-26 中冶京诚工程技术有限公司 Crank bending forging tool and method of marine diesel engine

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Granted publication date: 20121017