CN106001360B - The progressive upsetting shaping dies of thin-wall part and manufacturing process - Google Patents

The progressive upsetting shaping dies of thin-wall part and manufacturing process Download PDF

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Publication number
CN106001360B
CN106001360B CN201610428769.2A CN201610428769A CN106001360B CN 106001360 B CN106001360 B CN 106001360B CN 201610428769 A CN201610428769 A CN 201610428769A CN 106001360 B CN106001360 B CN 106001360B
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blank
drift
plug
upsetting
thin
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CN106001360A (en
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庄新村
朱圣法
赵震
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Shanghai Jiaotong University
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Shanghai Jiaotong University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/02—Dies or mountings therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/28—Making machine elements wheels; discs
    • B21K1/30—Making machine elements wheels; discs with gear-teeth

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

A kind of progressive upsetting shaping dies of the thin-wall part in metal material plastic forming technology field and manufacturing process, including：Drift, plug, anti-top bracket and cavity plate, wherein：Cavity plate is provided with the cylindrical cavity of upper and lower two connections, and anti-top bracket is arranged on lower cylindrical empty intracavitary and both gaps coordinate, and plug is arranged on cylindrical empty intracavitary and is provided with drift between the two, is that gap coordinates between drift and plug, cavity plate；Plug is correspondingly arranged up and down with anti-top bracket；The internal diameter of described lower cylindrical cavity is less than the external diameter of drift, more than plug external diameter；Described plug, anti-top bracket, drift and cavity plate forms near closed hollow ring.The present invention reduces the blank height of single upsetting, can effectively prevent the generation of plate flexing phenomenon by progressive upsetting.

Description

The progressive upsetting shaping dies of thin-wall part and manufacturing process
Technical field
The present invention relates to a kind of technology in metal material Plastic Forming field, specifically a kind of progressive upsetting of thin-wall part Shaping dies and manufacturing process.
Background technology
With the continuous improvement of automotive light weight technology requirement, the function of auto parts and components constantly integrates, thin-walled as shown in Figure 1 Toothed member and the different complicated disk like members of wall thickness, its planform complexity improve constantly, using also further extensively, therefore, carrying The machining accuracy and production efficiency of such high part are significant.Thin-walled tooth-shaped part typically has the matrix of cylindrical member, Circumferential to have uniform or local function tooth form, the size of tooth form is much smaller relative to the overall dimensions of part, according to entirety Upsetting, the defects of folding easily is produced, and shaping load is larger；It is relatively low according to mode, forming efficiencies such as machinings.
Processing method the most frequently used at present is spinning, by spinning cylindrical member side wall, so as to which material is squeezed into concave die cavity. But spinning production technology is used, except equipment cost is high, technical requirements are higher outer, while can also be with tooth top injustice, filling not Completely, the defects of surface indentation.
The content of the invention
The present invention is related to the defects of core rod species is more, it is proposed that a kind of thin-wall part for complex process in the prior art Progressive upsetting shaping dies and manufacturing process, by progressive upsetting, the blank height of single upsetting is reduced, can effectively be prevented The generation of plate flexing phenomenon.
The present invention is achieved by the following technical solutions,
The present invention relates to a kind of progressive upsetting shaping dies of thin-wall part, including：Drift, plug, anti-top bracket and cavity plate, Wherein：Cavity plate is provided with the cylindrical cavities of upper and lower two connections, and anti-top bracket is arranged on lower cylindrical empty intracavitary and between the two Gap coordinates, and plug is arranged on cylindrical empty intracavitary and is provided with drift between the two, is gap between drift and plug, cavity plate Coordinate, plug is correspondingly arranged up and down with anti-top bracket；
The internal diameter of described lower cylindrical cavity is less than external diameter, the external diameter more than plug of drift；
Described plug, anti-top bracket, drift and cavity plate forms near closed hollow ring.
Described drift is circumferentially evenly equipped with teeth, and described upper cylindrical cavity is correspondingly provided with teeth groove, between teeth and teeth groove Gap coordinates.
Described drift and cavity plate realize the control of downstream rate and downstream position by each independent hydraulic test respectively System, in the descending stopping of single upsetting, near closed hollow ring highly reduces, volume keeps constant for drift and cavity plate.
The present invention relates to a kind of manufacturing process of the progressive upsetting of thin-wall part, first according to the size drawing that need to shape thin-wall part Blank obtains blank, and blank is placed in lower cylindrical cavity, and blank opening direction is towards upper cylindrical cavity；Then anti-top Push away on support member and flushed at the top of blank to blank with upper cylindrical cavity bottom；Then by plug under upper cylindrical empty top of chamber Blank bottom is depressed into, the supreme cylindrical cavity bottom of drift is pressed between plug and upper cylindrical cavity, blank is fixed on In near closed hollow ring；Finally keep the spacing between plug and anti-top bracket constant, control drift and cavity plate at different rates Uniform descending carries out progressive upsetting to blank, when being flushed in blank bottom with upper cylindrical cavity bottom, completes upsetting.
Described thin-wall part side wall wall cross-sectional area is St, be highly It, the cross-sectional area of blank side wall wall is Sb、 Highly it is Ib, Ib×Sb=St×It。
The downstream rate of described drift is v0, descending displacement amount be Ib-It, the downstream rate of cavity plate is v1, descending displacement Measure as Ib；Both at uniform descending, and
Ideally, volume phase both during the descending stopping of the near closed hollow ring and blank the single upsetting in progressive upsetting Deng that is, in any very short time dt, the descending speed of drift is V0, the area corresponding to drift is St, then drift is descending causes Mold cavity volume reduction amount be St·V0Dt, the downstream rate of cavity plate is V1, the area corresponding to cavity plate is (St‐Sb), then it is recessed The incrementss of mold cavity volume caused by mould is descending are (St‐Sb)·V1·dt；Work as St·V0Dt=(St‐Sb)·V1Dt, and St、(St‐Sb) be fixed proportion, as long as therefore speed keep fixed proportion, mold cavity volume is ideally to maintain constant.
Technique effect
Compared with prior art, two active members of drift and cavity plate are employed in the present invention, by downstream rate Regulation and the control of downstream position, overall upsetting are decomposed into the progressive accumulation of zonule upsetting, in the process without more Drift and cavity plate are changed, reduces the blank height of single upsetting, can prevent upsetting process from flexing occurs, fills discontented etc. lack Fall into, realize zero defect upsetting.
Brief description of the drawings
Fig. 1 is typical wall thickness difference part and thin-walled tooth-shaped part schematic diagram；
Fig. 2 is apparatus structure schematic diagram in the present invention；
In figure：(a) it is front view, (b) is top view；
Fig. 3 is cavity die structure schematic diagram in the present invention；
In figure：(a) it is top view, (b) is profile；
Fig. 4 is middle ring tooth punch structure schematic diagram of the present invention；
In figure：(a) it is top view, (b) is profile；
Fig. 5 is manufacturing process flow chart in the present invention；
In figure：(a) it is original state figure, (b) is shaped state figure, and (c) is final state figure；
Fig. 6 is the variation diagram before and after a certain teeth upsetting of the outer tooth of thin-walled；
In figure：(a) and (c) is the structure chart before upsetting, and (b) and (d) is the structure chart after upsetting；
Fig. 7 is the outer tooth forming effect comparison diagram of thin-walled；
In figure：(a) it is blank schematic diagram, (b) step upsetting forming effect figure, (c) progressive upsetting forming effect figure
In figure：Ring tooth drift 1, plug 2, blank 3, anti-top bracket 4, cavity plate 5, near closed hollow ring 31, ring tooth cavity 51, circle Cylindrical cavity 52.
Embodiment
Embodiments of the invention are elaborated below, the present embodiment is carried out lower premised on technical solution of the present invention Implement, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementation Example.
Embodiment 1
As shown in Figures 2 and 3, the present embodiment is related to a kind of progressive upsetting shaping dies of the outer tooth of thin-walled, including：Ring tooth rushes First 1, plug 2, anti-top bracket 4 and cavity plate 5, wherein：The top of cavity plate 5 is provided with ring tooth cavity 51, and bottom is provided with cylindrical empty Chamber 52, ring tooth cavity 51 are connected with cylindrical cavity 52, and anti-top bracket 4 is arranged in cylindrical cavity 52 and both gaps are matched somebody with somebody Close, plug 2 is arranged in ring tooth cavity 51 and is provided with ring tooth drift 1 between the two, between ring tooth drift 1 and plug 2, cavity plate 5 It is that gap coordinates, plug 2 is correspondingly arranged with anti-top bracket about 4；
The internal diameter of described cylindrical cavity 52 is less than external diameter, the external diameter more than plug 2 of ring tooth drift 1；
Described plug 2, anti-top bracket 4, ring tooth drift 1 and cavity plate 5 forms near closed hollow ring 31.
As shown in Figure 3 and Figure 4, described ring tooth drift 1 is circumferential is evenly equipped with teeth, and described ring tooth cavity 51 is correspondingly provided with Teeth groove, teeth coordinate with teeth groove gap.
Described ring tooth drift 1 and cavity plate 5 respectively by each independent hydraulic test come realize downstream rate with it is descending The control of position；In the descending stopping of single upsetting, near closed hollow ring 31 highly reduces, volume is kept not for ring tooth drift 1 and cavity plate 5 Become.
Described plug 2 is used to position and support, during preventing the upsetting of blank 3, because ring tooth drift 1 and cavity plate 5 It is descending the situation of unstability occur.
The described supporting blanks 3 of anti-top bracket 4, prevent blank from outflowing.
As shown in figure 5, the present embodiment is related to a kind of manufacturing process of the outer progressive upsetting of tooth of thin-walled, first according to needing to shape The size drawing blank of the outer tooth of thin-walled obtains blank 3, and blank 3 is placed in cylindrical cavity 52, the opening direction court of blank 3 Ring tooth cavity 51；Then anti-top bracket 4 above pushes away blank 3 and flushed to the top of blank 3 with the bottom of ring tooth cavity 51；Then by core Rod 2 presses to the bottom of blank 3 from the top of toroidal cavity 52, and ring tooth drift 1 is pressed between plug 2 and ring tooth cavity 51 to ring tooth The bottom of cavity 51, blank 3 is fixed near closed hollow ring 31；Finally keep spacing between plug 2 and anti-top bracket 4 not Become, control ring tooth drift 1 with cavity plate 5 is descending at different rates carries out progressive upsetting to blank 3, in the bottom of blank 3 and ring tooth When the bottom of cavity 51 flushes, upsetting is completed, obtains the outer tooth of thin-walled.
Volume is equal both during the descending stopping of the single upsetting in progressive upsetting with blank 3 for the near closed hollow ring 31.
As shown in fig. 6, the outer single tooth form cross-sectional area of tooth of described thin-walled is S1, be highly I1, corresponding to single tooth form The cross-sectional area of blank side wall is S0, be highly I0, I0×S0=S1×I1。
The downstream rate of described ring tooth drift 1 is v0, descending displacement amount be I0-I1；The downstream rate of cavity plate 5 is v1, under Row displacement is I0；Both at uniform descending, andAvoid the occurrence of cavity plate 5 it is descending it is too fast, ring tooth drift 1 is descending Cross slowly, the volume of near closed hollow ring 31 is more than the volume of blank 3, causes tooth form to fill the defects of being discontented with, folding；Or under cavity plate 5 Went that slow, ring tooth drift 1 is descending too fast, the volume of blank 3 is more than the volume of near closed hollow ring 31, causes load to increase suddenly, damages Bad forcing press or the problems such as cause mould spalling.
As shown in fig. 7, carrying out side wall upsetting to cylindrical member blank in (a), traditional approach is such as used, a step upsetting shapes, Folding in (b) then occurs, the defects of flexing and the filling of tooth eminence are discontented, such as using progressive upsetting of the present invention into Shape, then can effectively avoid fold, flexing the defects of, meanwhile, tooth form filling rate is greatly improved.
The present invention is not only suitable for the upsetting shaping of the outer tooth of thin-walled, while is also applied for the side wall of large-scale cavity housing part Thicken, according to drift and cavity plate of the External Shape selection with corresponding construction.

Claims (6)

  1. A kind of 1. progressive upsetting shaping dies of thin-wall part, it is characterised in that including：Drift, plug, anti-top bracket and cavity plate, Wherein：Cavity plate is provided with the cylindrical cavities of upper and lower two connections, and anti-top bracket is arranged on lower cylindrical empty intracavitary and between the two Gap coordinates, and plug is arranged on cylindrical empty intracavitary and is provided with drift between the two, is gap between drift and plug, cavity plate Coordinate；Plug is correspondingly arranged up and down with anti-top bracket, and plug, anti-top bracket, drift and cavity plate form near closed hollow ring；
    The internal diameter of described lower cylindrical cavity is less than external diameter, the external diameter more than plug of drift；
    Described drift and cavity plate realize the control of downstream rate and downstream position, punching by each independent hydraulic test respectively In the descending stopping of single upsetting, near closed hollow ring highly reduces, volume keeps constant for head and cavity plate.
  2. 2. the progressive upsetting shaping dies of thin-wall part according to claim 1, it is characterized in that, described drift is circumferentially evenly equipped with Teeth, described upper cylindrical cavity are correspondingly provided with teeth groove, and teeth coordinate with teeth groove gap.
  3. 3. a kind of shaping dies according to claim 1 or claim 2 carries out the manufacturing process of the progressive upsetting of thin-wall part, its feature exists In obtaining blank according to the size drawing blank that need to shape thin-wall part first, and blank is placed in lower cylindrical cavity, blank Opening direction is towards upper cylindrical cavity；Then anti-top bracket above pushes away neat with upper cylindrical cavity bottom at the top of blank to blank It is flat；Then plug is pressed into blank bottom from upper cylindrical empty top of chamber, punching is pressed between plug and upper cylindrical cavity Supreme cylindrical cavity bottom, blank is fixed near closed hollow ring；Between finally keeping between plug and anti-top bracket Away from constant, uniform descending carries out progressive upsetting to control drift to blank at different rates with cavity plate, in blank bottom and upper circle When cylindrical cavity bottom flushes, upsetting is completed.
  4. 4. the manufacturing process of the progressive upsetting of thin-wall part according to claim 3, it is characterized in that, the near closed hollow ring and blank Volume is equal both during the descending stopping of single upsetting in progressive upsetting.
  5. 5. the manufacturing process of the progressive upsetting of thin-wall part according to claim 3, it is characterized in that, described thin-wall part side wall wall Face cross-sectional area is St, be highly It, the cross-sectional area of blank side wall wall is Sb, be highly Ib, Ib×Sb=St×It。
  6. 6. the manufacturing process of the progressive upsetting of thin-wall part according to claim 3, it is characterized in that, the downstream rate of the drift For ν0, descending displacement amount be Ib-It, the downstream rate of cavity plate is ν1, descending displacement amount be Ib；Both at uniform descending, andThin-wall part side wall wall cross-sectional height is It, the cross-sectional height of blank side wall wall is Ib。
CN201610428769.2A 2016-06-16 2016-06-16 The progressive upsetting shaping dies of thin-wall part and manufacturing process Active CN106001360B (en)

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CN106001360B true CN106001360B (en) 2018-01-02

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CN108188325B (en) * 2018-03-15 2024-01-30 上海应用技术大学 Cold heading forming folding-preventing die for thin-wall workpiece

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US4878370A (en) * 1988-08-15 1989-11-07 Ford Motor Company Cold extrusion process for internal helical gear teeth
JP2004268045A (en) * 2003-03-05 2004-09-30 Pacific Ind Co Ltd Die for forming gear and method for manufacturing gear
CN202591515U (en) * 2012-03-20 2012-12-12 雷帮荣 Hot extrusion punch for tube forming
PL224499B1 (en) * 2013-07-09 2016-12-30 Lubelska Polt The method of extruding the outer and inner collar
CN103639609B (en) * 2013-12-05 2016-04-27 山东理工大学 A kind of method and apparatus for thin-wall seamless pipe end upsetting

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