CN1166471C - Fine forging technology for automobile claw pole forging - Google Patents

Fine forging technology for automobile claw pole forging Download PDF

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Publication number
CN1166471C
CN1166471C CNB021027463A CN02102746A CN1166471C CN 1166471 C CN1166471 C CN 1166471C CN B021027463 A CNB021027463 A CN B021027463A CN 02102746 A CN02102746 A CN 02102746A CN 1166471 C CN1166471 C CN 1166471C
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China
Prior art keywords
forging
die
precision
technology
claw pole
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Expired - Fee Related
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CNB021027463A
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CN1364669A (en
Inventor
孙惠学
苏升贵
史艳国
王迎斌
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Yanshan University
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Yanshan University
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Priority to CNB021027463A priority Critical patent/CN1166471C/en
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Publication of CN1166471C publication Critical patent/CN1166471C/en
Expired - Fee Related legal-status Critical Current
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Abstract

The present invention relates to the technical field of metal precise form, particularly to a technical method for precisely forging a claw pole of an automobile. The present invention aims at providing a technology for precisely forging the claw pole of an automobile. The technical technology for precisely forging is accomplished by the following procedures: upsetting, precisely preforming a blank sheet by a divided concave mould in a side direction warm extrusion mode, forming in a finish forging mode and cutting flash edges, etc. in fire. The present invention simplifies the forging technological processes and reduces procedures in order to have the advantages of high quality, material saving, energy saving and time saving. At the same time, the service life of moulds can be remarkably prolonged.

Description

Fine forging technology for automobile claw pole forging
Technical field
The present invention relates to metal Precision Forming Technology field, particularly relate to automobile claw pole fine forging technology method.
Technical background
The pawl utmost point is the vital part in the AC generator for vehicle.Its specification is more, but its shape is all similar, and just size is different.Because the high complexity of its geometry and the importance of serviceability, thereby increased the difficulty of its forging and molding.
This forging shape, structure very complicated (Fig. 3, Fig. 4): the middle part is a boss with holes, six thin uniform horizontal abdomens are arranged on the boss termination, uniform six complex-shaped perpendicular pawls in horizontal abdomen end, except that centre bore and the upper and lower plane of boss need the machining, remainder is casting skin, thereby the forging difficulty is very big.
The manufacturing process of pawl utmost point forging is a lot of in the prior art, but its pros and cons are respectively arranged.Select for use the sort of scheme will be in conjunction with working condition and economic and technical norms and decide actually.At present, mainly contain following two kinds of schemes:
Cold-extrusion technology.Introduce in Zhu Weicheng work " auto parts fine forging technology " (publishing house of Beijing Institute of Technology 1999) book, U.S. Ford Motor Company and Nippondenso Co., Ltd. went into operation more than 30 year with this method.Its master operation is: jumping-up → preform → finish-forging shaping → deburring and pressure-sizing (inter process also has processing such as annealing, phosphatization and saponification).This technology forging surface quality is good, precision is high, but operation is many, deformation force is big, needs large-tonnage equipment, and die life is low.
Warm extrusion technology.Nearest domestic red-face roles Xiao etc. propose warm extrusion forming technology scheme in " the warm forging shaping and the three dimensional FEM simulation thereof of pawl utmost point part " (metal forming machinery 2/2000) literary composition: scheme 1, jumping-up → radial compression → upsetting pressure → side cut → bending → shaping; Scheme 2, jumping-up → upsetting squeeze → upsetting pressure → side cut → bending → shaping.Preceding four steps are warm extrusion work step (deformation temperature is 700~850 ℃) in two schemes, and latter two is the cold forging work step.Radial compression and upsetting squeeze are crucial work steps in two schemes.This technology is compared with cold-extruded technology: technical process has been simplified, and operation has reduced, and has reduced the load of deformation force and equipment needed thereby, and also increased die life.But operation is still many.
Summary of the invention
The object of the present invention is to provide a kind of fine forging technology for automobile claw pole forging, Forging Technology process is simplified in this invention, reduces operation, the purpose when reaching high-quality, material-saving, energy-conservation and joint, the service life that can also improve mould more significantly simultaneously.
This fine forging technology for automobile claw pole forging, it is characterized in that: its technology is in a fire, be that deformation temperature is 850-950 ℃, adopt jumping-up → can divide die side direction warm extrusion to press precision performing part → finish-forging 4 operations such as overlap that are shaped → cut to finish the precision forging process:
1, the mould that can divide die side direction warm extrusion to press precision performing part is made up of upper and lower die 1,5 and extruding drift 2, the blank behind jumping-up that will heat earlier before the work is put into lower cavity die, blank preferably adopts electrical induction, then with upper and lower die 1,5 matched moulds, impose pressing mold with special mould structure or double action press and defeat tight mould, after forming near closed hollow ring, carry out Closed Extrusion with extruding drift 2, open upper cavity die afterwards, eject forging with push rod 3, in this work step, finished the shaping of horizontal abdomen and perpendicular pawl substantially;
2, this kind mould structure and mode of texturing force metal to flow to the die cavity depths under the three-dimensional compressive stress state, when lateral compression, because the continuity of velocity field, speed straight down can not transfer the speed of horizontal direction at once, and metal is the lower part that enters horizontal abdomen with the angled velocity of horizontal axis, and this then helps the shaping of perpendicular pawl, in addition, lower cavity die 5 horizontal abdomen baseplanes are made with horizontal plane become suitable inclined-plane, this inclined-plane angle α is 3 °~7 °; The radius of corner R=3-8mm of perpendicular pawl porch will more help the shaping of perpendicular pawl like this when prefabricated blank;
3, in finish-forging shaping work step, because what adopt is accurate base, then be beneficial to being full of and reducing required deformation force of metal, excess metal will enter in the flash gutters in this work step, leave passage at perpendicular hook tip, with the resistance of minimizing metal flow;
4, excise overlap at last, all operation finishes.
Description of drawings
Fig. 1 can divide die side direction warm extrusion to press the precision performing part die drawing
Fig. 2 is finish-forging shaping dies figure
Fig. 3 is a pawl utmost point part A-A view
Fig. 4 is a pawl utmost point part drawing
The specific embodiment
Accompanying drawing 1, accompanying drawing 2 are specific embodiments of the invention (see Fig. 1, Fig. 2), at first should design hot and cold forging drawing according to product parts figure, calculate required billet size (diameter and length); Can divide die side direction warm extrusion to press precision performing part figure (die cavity was full of when its shape and size should be beneficial to finish-forging) according to principle of the present invention and method design; Power energy parameter (extruding force and a mould power etc.) when calculating distortion; Select pressing mold power load mode and Type of equipment; Design prefabricated blank die drawing, finish-forging shaping dies figure and shaving die figure according to above two figure with according to this Fig. 1, Fig. 2; Select suitable mold materials and mold hot to handle at last, and select the suitable lubricant material and the preheating and the type of cooling of mould.
Can divide die side direction warm extrusion precision performing part to forge scheme owing to adopt, can reach and simplify claw pole forging Forging Technology process, to have reduced operation, the purpose when reaching high-quality, material-saving, energy-conservation and joint.The service life that simultaneously can also improve mould, the service life that just can improve the finish-forging shaping dies as the precision form of prefabricated blank; When the prefabricated blank die wear is arrived to a certain degree, also can forge qualified forging by the finish-forging shaping dies.

Claims (2)

1. automobile claw pole forging precision forging method, it is characterized in that: its technology is in a fire, adopts jumping-up → can divide die side direction warm extrusion to press precision performing part → finish-forging 4 operations such as overlap that are shaped → cut to finish the precision forging process;
(1), can divide mould that die side direction warm extrusion presses precision performing part by upper and lower die (1), (5) with push drift (2) and form, the horizontal abdomen of lower cavity die (5) baseplane is made to become suitable inclined-plane, this inclined-plane angle with horizontal plane be 3 °~7 °; The fillet diameter R=3-8mm of perpendicular pawl porch, when preform, will help the shaping of perpendicular pawl like this, the blank behind jumping-up that will heat earlier before the work is put into lower cavity die, blank adopts electrical induction, then with upper and lower die (1), (5) matched moulds, and impose pressing mold and defeat after tight mould forms near closed hollow ring, carry out Closed Extrusion with pushing drift (2), open upper cavity die (1) afterwards, eject forging with push rod (3);
(2), in finish-forging shaping work step because what adopt is accurate base, then be beneficial to being full of and reducing required deformation force of metal, excess metal will enter in the flash gutters in this work step, leave passage at perpendicular hook tip, with the resistance of minimizing metal flow;
(3), at last excise overlap, all operation finishes.
2, automobile claw pole forging precision forging method according to claim 1 is characterized in that: deformation temperature is 850-950 ℃.
CNB021027463A 2002-01-22 2002-01-22 Fine forging technology for automobile claw pole forging Expired - Fee Related CN1166471C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB021027463A CN1166471C (en) 2002-01-22 2002-01-22 Fine forging technology for automobile claw pole forging

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Application Number Priority Date Filing Date Title
CNB021027463A CN1166471C (en) 2002-01-22 2002-01-22 Fine forging technology for automobile claw pole forging

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CN1364669A CN1364669A (en) 2002-08-21
CN1166471C true CN1166471C (en) 2004-09-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103071978A (en) * 2013-01-10 2013-05-01 太仓久信精密模具有限公司 Warm and cold combined forming process for claw pole of generator

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101386120B (en) * 2008-10-23 2010-06-02 海盐猛凌汽车配件有限公司 Forming method of automobile generator claw pole
CN102211268A (en) * 2010-04-06 2011-10-12 金华市星普精锻汽配有限公司 Manufacture process of automobile generator finish-forged claw pole capable of reducing noise
CN102189206B (en) * 2011-03-01 2012-11-28 湖北巨力锻造有限公司 Forging technology of cylinder lifting lug of automobile
CN105642695A (en) * 2014-12-04 2016-06-08 汪超 Die for manufacturing claw pole of automobile generator
CN104525605B (en) * 2014-12-04 2016-09-28 汪超 A kind of mould for manufacturing automobile generator claw pole
CN106002108A (en) * 2016-07-12 2016-10-12 安徽工业大学 Precise manufacturing method of generator claw pole
CN109570418B (en) * 2018-11-23 2020-06-12 哈尔滨工业大学 Precise forming method for aluminum alloy rib plate type rectangular forge piece

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103071978A (en) * 2013-01-10 2013-05-01 太仓久信精密模具有限公司 Warm and cold combined forming process for claw pole of generator
CN103071978B (en) * 2013-01-10 2015-01-28 太仓久信精密模具有限公司 Warm and cold combined forming process for claw pole of generator

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Publication number Publication date
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