CN102009112B - Method for thickening annular outer edge of circular plate material - Google Patents

Abstract

The invention relates to a method for thickening the annular outer edge of a circular plate material, and belongs to a method for forging and forming plates. The method for thickening the annular outer edge of the circular plate material solves the problems of rigorous blanking and overmany spinning passes in the conventional method for thickening the outer edge of the circular plate material. In the method for thickening the annular outer edge of the circular plate material, N rolled wheels are arranged on the outer edge of the circular plate material; an annular rolled groove is formed on each rolled wheel; the section of the rolled groove has an open rectangular shape; the circular plate material is positioned in the rolled groove and rotates around a longitudinal shaft of the circular plate material; the N rolled wheels feed and extrude the outer edge of the circular plate material radially and sequentially; and after one rolled wheel feeds and extrudes the outer edge of the circular plate material radially and withdraws, the next rolled wheel feeds and extrudes the outer edge of the circular plate material radially and withdraws, so that the annular outer edge of the circular plate material is thickened sequentially. When disk-shaped or annular parts are produced by the method, if an increased thickness is smaller, fewer steps can be adopted; in a forming process, the defect that the outer edge is not filled is overcome; and even if blanks are slightly small, wastes are still not formed and the blanking requirement is not reduced. Products produced by the method have strong strength and stable quality, are not influenced by a welding process, and saves materials and energy.

Description

A kind of circular plate outer circular edge thickening method

Technical field

The invention belongs to plate forging and molding method, particularly a kind of circular plate outer circular edge thickening method.

Background technology

Mould pressing technology be generally used for being shaped revolving body cylindrical member or dish.Many people study the mould pressing technology of cylindrical member, see 1. summer qin perfume (or spice) etc. numerical simulation and experimental study that Tapered Cup single pass draw spinning is shaped, forging technology, 2010,35 (1): 44-49, (2); 2. Luo Duyu, Xia Qinxiang. based on the draw spinning system cup technological parameter research of orthogonal test. precise forming process, 2010, (2): 43-48; 3. Zhang Yanqiu, Jiang Shuyong, Sun Jinfeng etc. the research of thin-wall tube-shaped element multi-pass ball spinning compacting mechanism. forging technology, 2010,35 (2): 55-58; 4. Liu Tao, Long Siyuan, Li Bing. magnesium alloy cylindrical member spinning forming process and mould design. Tool and Die Technology, 2010 (2): 29-31; 5. Yang Kun, Li Jian. based on the TA2 cylindrical member multi-pass mould pressing process of Finite Element Method. plastic engineering journal, 2010,17 (2): 39-45.

Aspect pipe fitting forming; Patent Z100806529.2 discloses a kind of method that adopts a tube end of mould pressing; Around with the rotation of individual longitudinal axis, and the end of heating tube is through moving around molded component and the end of forming tube along a series of crooked route with circumference of cannon bone for this method; Patent ZL01144104.6 discloses a kind of large diameter thin wall pipe steep cliff method for sealing, is about to the heating of tubing sealing part, cuts off after adopting three-wheel or four-wheel rotation press closing then.

Aspect discoid part spinning, Xia Qinxiang etc. have developed a kind of mould pressing technology of belt pulley, (see: 1. the summer qin is fragrant, Cheng Xiuquan. be used for the device of belt wheel mould pressing. and the patent No.: ZL200720058970.2; 2. Zhou Sicong, Xia Qinxiang etc. the belt pulley spinning lathe is with embedded open property Study NC on System. lathe and hydraulic pressure .2009,37 (5): 11-14; 3. qin is fragrant the summer, Wang Yingpin etc. the influence that polywedge bet wheel mould pressing preforming technique parameter is shaped to waist drum. and mould industry .2010,36 (1): 26-31) to be about to drawing part be the belt wheel of many wedges through mould pressing; Huang Liang, Chen Yun fly etc. a kind of v shape of research rive formula mould pressing technology (see: 1. yellow bright, Yang He etc. fractal mould pressing Research progress. material science and technology .2008,16 (4): 476-480; 2. Chen Yun flies; The formula belt pulley mould pressing process analysis procedure analysis of riving of .V shapes such as Wen Tong. metal casting smithwelding technology .2009, (1): 88-90), promptly utilize spinning roller with hard wedge angle; Radial feed is made gradually at the edge, square-section of the circular blanks that rotating to be clamp-oned; Make it separately to become two parts of " bifurcation " shape, and then use 1～3 shaping spinning roller that it is carried out shaping spinning, obtain a kind of manufacturing process of needed shape and size part.Though spinning research is very many, above these technology do not relate to the method that circular plate is thickened.

Patent US5904060, US6016602A, WO9622847A, US6925713B and one Chinese patent application 95192246.7 disclose a kind of wheel that rolls that adopts V-arrangement type groove; Warp is spinning repeatedly; Circular slab edge spinning is thickened forming V-shape; Along with the increase of spinning passage, the subtended angle of V-arrangement type groove is increasing, is spun into the method for rectangle at last.This method increase thickness less in, still need be through spinning repeatedly; When changing rectangle into by V-type again,, cause wheel rim outside filling not full easily if blank is less than normal; Thereby formation waste product, blanking are sufficient excessively, then can cause to revolve that to roll radial load excessive; Improved the load bearing requirements of main shaft, quickened the wearing and tearing of main shaft, so blanking is harsh.

Summary of the invention

The present invention provides a kind of circular plate outer circular edge thickening method; Solve harsh, the too much problem of spinning passage of blanking that existing circular plate outer circular edge thickening method exists; Be used for the flywheel ring gear base, the edge of disc such as belt pulley base or ring-shaped work pieces thickens.

A kind of circular plate outer circular edge thickening method of the present invention is provided with N in said circular plate outer rim and rolls wheel, respectively rolls wheel and has annular groove, and said circular plate is around self longitudinal axis rotation, N >=1; It is characterized in that:

Said N rolls and to take turns feeding successively and push circular plate outer rim, one roll take turns radially feeding extruding and withdraw from after, the next one rolls takes turns radially feeding extruding and withdraws from, and thickens circular plate outer circular edge successively;

Said groove cross sectional shape is the opening rectangle, and said circular slab material level is in groove.

The thickening method of described circular plate outer circular edge is characterized in that:

The said wheel number N that rolls is:

Wherein,

Expression rounds up to the numerical value in the bracket, K=1.015～1.020, and material plasticity is good more, and the K value is big more, t ₀Be circular plate original depth, t _NBe circular plate outer circular edge final thickness, d _NBe circular plate final diameter, d is the not diameter of thickening of circular plate, d ₀Be circular plate initial diameter:

$d_0=\sqrt{\frac{t_N(d_N^2-d^2)}{t_0}+{\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="HDA0000029218780000011.png,HDA0000029218780000021.png"\; state="\{\{state\}\}">d</figure-callout>}}^2};$

N the degree of depth of rolling wheel groove opening rectangle is (d _n-d)/2,1≤n≤N;

In the formula, after n rolls wheel feeding extruding and withdraws from, the diameter d of circular plate outer circular edge _nFor:

d _n=(d _N-1+ d)/and k-d, deformation parameter k is:

$k=\sqrt[N]{(d_N-d)\&times;t_N/[(d_0-d)\&times;t_0]},$

N width t that rolls wheel groove opening rectangle _nFor:

t _n＝k×(d _n-1-d)×t _n-1/(d _n-d)；

N is rolled the wheel amount of feeding is (d _N-1-d _n)/2, feed speed are that 0.01～0.10mm/ changes.

Described circular plate outer circular edge thickening method is characterized in that:

The speed of mainshaft of the said circular plate of clamping is 400～600rpm.

When adopting spinning of the present invention to thicken,,, can directly be used for spinning like 08AL for the circular preferably plate of plasticity; For the relatively poor circular plate of plasticity, then need carry out after the spheroidizing spinning more earlier like the 45# steel.

Adopt the present invention to produce disc or the ring-shaped work pieces of outer edge thickness than thick middle; If it is less to increase thickness, can adopt step still less to accomplish, in addition in the forming process; There is not the discontented defective of outer rim filling; Even blank is slightly less than normal, still can not form waste product, reduced the requirement of blanking.

Adopt the present invention to produce outer edge thickness and have clear superiority than the disc or the ring-shaped work pieces of thick middle, as can gear ring blank and terminal pad is integrally formed when adopting this technology to make Flywheel disc, tooth shaping gear ring perhaps rolled through machining then.And traditional production method be terminal pad through drawing, it is through slab being washed into ring-type that gear ring is shaped, cutting is shaped then, at last with gear ring and terminal pad welding, so stock utilization less than 40%, and welding is difficult to guarantee the connection precision.So adopt the product strength that the present invention produced high, not influenced by welding procedure, steady quality, material-saving, energy-conservation.

Description of drawings

Fig. 1 is the present invention's schematic diagram that is shaped;

The system schematic that Fig. 2 thickens for four-pass spinning;

Fig. 3 (a) thickens the shaping principle schematic for the spinning symmetry;

Fig. 3 (b)～Fig. 3 (e) thickens the forming process sketch map for four-pass spinning symmetry;

Fig. 4 (a) is the asymmetric shaping principle schematic that thickens;

Fig. 4 (b)～Fig. 4 (e) is the asymmetric forming process sketch map that thickens of four-pass spinning.

The specific embodiment

The present invention's principle that is shaped is as shown in Figure 1: circular plate 2 places on the lower main axis 3; Last main shaft 1 is descending; Together rotation after with lower main axis 3 circular plate 2 being clamped, have annular groove roll wheel 4 radially feeding roll wheel 4 passive rotations until behind the precalculated position, withdrawing from.

Be illustrated in figure 2 as one embodiment of the present of invention, be provided with first in circular plate outer rim and roll wheel 4-1, second rolls wheel 4-2, and the 3rd rolls wheel 4-3, and the 4th rolls wheel 4-4; Respectively roll wheel and have annular groove, in forming process, circular plate 2 is by after the grasping of last main shaft 1 and lower main axis 3; Make circular plate 2 with main axis rotation, 4 are rolled wheel and move successively, and first rolls and take turns radially feeding extruding; Withdraw from along original route until the part spinning outside the circular plate 2 main shaft clampings being thickened the back, second rolls wheel 4-2 then, and the 3rd rolls wheel 4-3; The 4th rolls wheel 4-4, carries out successively with first and rolls the identical action of wheel 4-1, until sheet forming is partly thickened to final requirement.

Shown in Fig. 3 (a), when spinning, circular plate 2 mid-planes 5 with roll wheel 4 groove mid-planes 6 and overlap and can realize that symmetrical spinning thickens.

Thickening process with spinning symmetry shown in Fig. 3 (b)～Fig. 3 (e) is example, explains that the present invention has the design of related parameter.

Circular plate 2 materials are No. 35 steel, and original thickness is t ₀=2.5mm, mould pressing rear rim final thickness t _N=8.5mm, diameter d=242mm, d _N=260mm.

(1) at first confirms circular plate initial diameter d ₀:

$d_0=\sqrt{\frac{t_N(d_N^2-d^2)}{t_0}+{\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="HDA0000029218780000011.png,HDA0000029218780000021.png"\; state="\{\{state\}\}">d</figure-callout>}}^2}$

$=\sqrt{\frac{8.5\&times;({260}^2-{242}^2)}{2.5}+{242}^2}$

$=298.8\mathrm{mm}$

Confirm the spinning times N then, No. 35 steel plasticity is better, and getting the K initial value is 1.02,

Event need be carried out spinning 4 times, confirms deformation parameter k value according to the N value:

$k=\sqrt[N]{(d_N-d)\&times;t_N/[(d_0-d)\&times;t_0]}$

$\sqrt[4]{(260-242)\&times;8.5/[(298.8-242)\&times;2.5]}$

$=1.019$

(2) diameter of the circular plate outer circular edge of definite again each passage, the circular plate outer circular edge of each passage thickness;

Shown in Fig. 3 (b), the diameter d of circular plate outer circular edge behind the spinning for the first time ₁:

d ₁＝(d ₀+d)/k-d

＝(298.8+242)/1.019-242，

＝288.72mm

Circular plate outer circular edge thickness t behind the spinning for the first time ₁:

t ₁＝k×(d ₀-d)×t ₀/(d ₁-d)

＝1.019×(298.8-242)×2.5/(288.72-242)；

＝3.10mm

Shown in Fig. 3 (c), the diameter d of circular plate outer circular edge behind the spinning for the second time ₂:

d ₂＝(d ₁+d)/k-d

＝(288.72+242)/1.019-242，

＝278.82mm

Circular plate outer circular edge thickness t behind the spinning for the second time ₂:

t ₂＝k×(d ₀-d)×t ₀/(d ₂-d)

＝1.019g(298.8-242)g2.5/(278.82-242)；

＝3.92mm

Shown in Fig. 3 (d), the diameter d of circular plate outer circular edge behind the spinning for the third time ₃:

d ₃＝(d ₂+d)/k-d

＝(278.82+242)/1.019-242，

＝269.12mm

Circular plate outer circular edge thickness t behind the spinning for the third time ₃:

t ₃＝k×(d ₀-d)×t ₀/(d ₃-d)

＝1.019×(298.8-242)×2.5/(269.12-242)；

＝5.34mm

Shown in Fig. 3 (e), the diameter d of circular plate outer circular edge behind the 4th spinning ₄=d _N=130mm,

Circular plate outer circular edge thickness t behind the 4th spinning ₄=t _N=8.5mm;

T wherein _n/ t _N-1=λ _nFor thickening ratio, (n is the number of times sequence number that thickens) considered the spinning the closer to the front, because the width and the thickness ratio of slab spinning part are big more, i.e. and (d ₀-d ₀)/(2t _N-1) big more, easier unstability is so there is λ _N-1≤λ _n≤1.

Each passage is rolled the wheel feed speed and is the 0.02mm/ commentaries on classics; The speed of mainshaft of the circular plate of each passage clamping is 500rpm.

Shown in Fig. 4 (a), when spinning, in the circular plate 2 face 5 with roll wheel 4 grooves in face 6 do not overlap and can realize that asymmetric spinning thickens.Fig. 4 (b)～Fig. 4 (e) is the asymmetric forming process sketch map that thickens of four-pass spinning.

The design that related parameter is arranged is shown in Fig. 4 (b)～Fig. 4 (e), and the method that thickens with the spinning symmetry shown in Fig. 3 (b)～Fig. 3 (e) is identical.

Each passage is rolled the wheel feed speed and is the 0.01mm/ commentaries on classics; The speed of mainshaft of the circular plate of each passage clamping is 600rpm.

Claims (2)

1. a circular plate outer circular edge thickening method is provided with N in said circular plate outer rim and rolls wheel, respectively rolls wheel and has annular groove, and said circular plate is around self longitudinal axis rotation, N >=1; It is characterized in that:

Said N rolls and to take turns feeding successively and push circular plate outer rim, one roll take turns radially feeding extruding and withdraw from after, the next one rolls takes turns radially feeding extruding and withdraws from, and thickens circular plate outer circular edge successively;

Said groove cross sectional shape is the opening rectangle, and said circular slab material level is in groove;

The said wheel number N that rolls is:

Wherein,

Expression rounds up to the numerical value in the bracket, K=1.015～1.020, and material plasticity is good more, and the K value is big more, t ₀Be circular plate original depth, t _NBe circular plate outer circular edge final thickness, d _NBe circular plate final diameter, d is the not diameter of thickening of circular plate, d ₀Be circular plate initial diameter:

$d_0=\sqrt{\frac{t_N(d_N^2-d^2)}{t_0}+d^2};$

N the degree of depth of rolling wheel groove opening rectangle is (d _n-d)/2,1≤n≤N;

In the formula, after n rolls wheel feeding extruding and withdraws from, the diameter d of circular plate outer circular edge _nFor:

d _n=(d _N-1+ d)/and k-d, deformation parameter k is:

$k=\sqrt[N]{(d_N-d)\&times;t_N/[(d_0-d)\&times;t_0]},$

N width t that rolls wheel groove opening rectangle _nFor:

t _n＝k×(d _n-1-d)×t _n-1/(d _n-d)；

N is rolled the wheel amount of feeding is (d _N-1-d _n)/2, feed speed are that 0.01～0.10mm/ changes.

2. circular plate outer circular edge thickening method as claimed in claim 1, it is characterized in that: the speed of mainshaft of the said circular plate of clamping is 400～600rpm.

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