CN104057004A - Forming method of forging piece and mold for forging - Google Patents
Forming method of forging piece and mold for forging Download PDFInfo
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- CN104057004A CN104057004A CN201410102832.4A CN201410102832A CN104057004A CN 104057004 A CN104057004 A CN 104057004A CN 201410102832 A CN201410102832 A CN 201410102832A CN 104057004 A CN104057004 A CN 104057004A
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Abstract
Provided are a forming method of a forging piece and a mold for forging. The object of the invention is to provide a forging method with excellent completion shape. A first pressing surface (26) inclines towards the following direction (an arrow (2) in the figure) relative to at least a specific sliding surface (27): the closer the first pressing surface (26) is to the specific sliding surface (27), the more backward the direction (an arrow (1) in the figure) of a material is relative to the mold. The first pressing surface (26) inclines in a way that a side of the specific sliding surface (27) is close to a punch and the center side is far away from the punch. For instance, an inclination angle (theta 1) is 15 degrees. Forging materials can be filled in corners between the first pressing surface and the specific sliding surface with low loads, material shortage is prevented, and the shape of the forging piece is excellent.
Description
Technical field
The present invention relates to the good FMT of shape.
Background technology
For example, gear clutch possess be called teeth (ド グ Dentistry) the engaging piece of dentation.For such gear clutch, if adopt the mechanical processing method that material is cut can easily manufacture acquisition, but have difficulties on the raising of finished material rate and the point of operation shortening.Instead processing method, has proposed forging method (for example,, with reference to patent documentation 1(the 5th figure).）。
Figure 15 is for the figure of the basic principle of forging method is in the past described.By the technology of patent documentation 1, produce the 1st forge piece 101 shown in (a) of Figure 15, by the 1st forge piece 101 is implemented to formal moulding (finishing), obtain the 2nd forge piece (gear forming main body) 104 such shown in Figure 15 (b).At the 2nd forge piece 104, be formed with the spline tooth 105 that is equivalent to engaging piece.
In the forging molding of spline tooth 105, at the end T away from main part 102, easily there is to lack material.Thus, in scheme in the past, in order to guarantee sufficient decrement in the tooth forming portion 103 of the 1st forge piece 101, as shown in Figure 15 (a), in the mould 100 of the 1st forge piece 101 use, make press surface 100B to approaching the just direction of intensification inclination of sliding surface 100A.Like this, in (a) of Figure 15, the part that is V word is clout part 103a, by compressing this clout part 103a, processes the spline tooth 105 of Figure 15 (b).In order to obtain decrement, mold shape is studied, the clout part 103a that forms the 1st forge piece 101 of take stretches out significantly as speciality.
But, when present inventor has a fling at, find to exist following problems.
First, as shown in Figure 15 (c), at the end (lower end) of tooth forming section 103, produce slack 106.
Consider that its reason is: even if want to make tooth forming portion 103 to stretch out moulding along the shape of mould 100, but in fact not enough to the inflow of the end apart from main part 102 outer circumferential side farthest (lower end), occurred slack 106.If apply great moulding load, can be filled into end by forging material, likely can eliminate the scarce material of end, but consider the intensity of mould, this is unpractical.
Even such the 1st forge piece 101 is implemented to formal moulding, as shown in Figure 15 (d), still there is a scarce material portion 107 spline tooth 105 is remaining.Consider its former because: even clout part 103a is compressed by formal moulding, also cannot eliminate slack 106 fillet of the 1st forge piece 101 completely, still have residual.This scarce material portion 107 can remove by machining, but owing to having increased machining in forging process, processing charges is increased.
Patent documentation 1: Japanese Patent Publication 49-11543 communique
Summary of the invention
Problem of the present invention is to provide a kind of good forging method of shape that completes.
The invention of technical scheme 1 is the forming method of forge piece, it is characterized in that, it possesses: the 1st operation, and use the 1st mould to form the 1st forge piece, and the 2nd operation, the clout portion that compresses described the 1st forge piece with the 2nd mould carries out finishing, described the 1st mould comprises the 1st sliding surface sliding for material, with the 1st press surface of pressing described material, the 1st press surface tilts to following direction with respect at least one specific sliding surface: the 1st press surface approaches this specific sliding surface, with regard to the direction that more enters mould with respect to described material, retreat, described the 2nd mould comprises the 2nd sliding surface and the 2nd press surface, by the 2nd sliding surface, retrain the outer peripheral face of described the 1st forge piece, and compress end by described the 2nd press surface, described the 2nd press surface is different with respect to the gradient of specific sliding surface from described the 1st press surface with respect to the gradient of specific sliding surface.
The invention of technical scheme 2 is forming methods of forge piece, it is characterized in that, it possesses: the 1st operation, and use the 1st mould to form the 1st forge piece, and the 2nd operation, the clout portion that compresses described the 1st forge piece with the 2nd mould carries out finishing, described the 1st mould comprises the 1st sliding surface sliding for material, with the 1st press surface of pressing described material, the 1st press surface is crooked to following direction with respect at least one specific sliding surface: the 1st press surface approaches this specific sliding surface, with regard to the direction that more enters mould with respect to described material, retreat, described the 2nd mould comprises the 2nd sliding surface sliding for described the 1st forge piece, with the 2nd press surface of pressing described the 1st forge piece, the 2nd press surface is crooked to following direction with respect at least one specific sliding surface: the 2nd press surface approaches this specific sliding surface, with regard to the direction that more enters mould with respect to described the 1st forge piece, retreat, the curved shape of described the 1st press surface and described the 2nd press surface is mutually different.
In the invention of technical scheme 3, it is characterized in that, by described the 1st mould and described the 2nd mould, the engaging piece of the dentation with the engagement of the other side's parts is carried out to moulding.
In the invention of technical scheme 4, it is characterized in that, by described the 1st press surface and the 2nd press surface, at engaging piece, form terminal part, this terminal part plays a role as engagement starting point when meshing with the other side's parts.
The invention of technical scheme 5 is forging moulds, it consists of the 1st mould and the 2nd mould, described the 1st mould is for obtaining the 1st forge piece by forging, described the 2nd mould is for carrying out formal moulding to described the 1st forge piece, described forging is characterised in that with mould, described the 1st mould comprises the 1st sliding surface sliding for material, with the 1st press surface of pressing described material, the 1st press surface tilts to following direction with respect at least one specific sliding surface: the 1st press surface approaches this specific sliding surface, with regard to the direction that more enters mould with respect to described material, retreat, described the 2nd mould comprises the 2nd sliding surface and the 2nd press surface, by the 2nd sliding surface, retrain the outer peripheral face of described the 1st forge piece, and compress end by described the 2nd press surface, described the 2nd press surface is different with respect to the gradient of specific sliding surface from described the 1st press surface with respect to the gradient of specific sliding surface.
In the invention of technical scheme 6, it is characterized in that, described the 2nd press surface is less than described the 1st press surface with respect to the gradient of specific sliding surface with respect to the gradient of specific sliding surface.
In the invention of technical scheme 7, it is characterized in that, described the 1st press surface forms by a plurality of that clip crest line, and crest line approaches the sliding surface being connected with one end of this crest line, and the direction just entering with respect to material retreats.
The invention of technical scheme 8 is forging moulds, it consists of the 1st mould and the 2nd mould, described the 1st mould is for obtaining the 1st forge piece by forging, described the 2nd mould is for carrying out formal moulding to described the 1st forge piece, described forging is characterised in that with mould, described the 1st mould comprises the 1st sliding surface sliding for material, with the 1st press surface of pressing described material, the 1st press surface is crooked to following direction with respect at least one specific sliding surface: the 1st press surface approaches this specific sliding surface, with regard to the direction that more enters mould with respect to described material, retreat, described the 2nd mould comprises the 2nd sliding surface sliding for described the 1st forge piece, with the 2nd press surface of pressing described the 1st forge piece, the 2nd press surface is crooked to following direction with respect at least one specific sliding surface: the 2nd press surface approaches this specific sliding surface, with regard to the direction that more enters mould with respect to described the 1st forge piece, retreat, the curved shape of described the 1st press surface and described the 2nd press surface is mutually different.
In the invention of technical scheme 1, by the 1st mould, implement the 1st operation, by the 2nd mould, implement the 2nd operation.In the 1st operation, till can forging material being filled into the corner between the 1st press surface and specific sliding surface with low load.That is, in the 1st operation, obtain the 1st forge piece of form of the clear-cut of corner portion, in the 2nd operation, by retraining the periphery of the 1st forge piece and compressing end face, formed shape clearly.
In the invention of technical scheme 2, the same with technical scheme 1, by the 1st mould, implement the 1st operation, by the 2nd mould, implement the 2nd operation.In the 1st operation, till can forging material being filled into the corner between the 1st press surface and specific sliding surface with low load.That is, in the 1st operation, obtain the 1st forge piece of form of the clear-cut of corner portion, in the 2nd operation, by retraining the periphery of the 1st forge piece and compressing end face, formed shape clearly.
In the invention of technical scheme 3, by the 1st mould and the 2nd mould, the engaging piece of the dentation with the engagement of the other side's parts is carried out to moulding, therefore can mold the forge piece that shape is more complicated.
In the invention of technical scheme 4, by the 1st press surface and the 2nd press surface, at engaging piece, form terminal part, terminal part plays a role as engagement starting point when meshing with the other side's parts, therefore can make the position playing a role as engagement starting point with high-precision modeling.
In the invention of technical scheme 5, the 1st press surface of the 1st mould tilts with following direction: the 1st press surface approaches specific sliding surface, with regard to the direction that more enters mould with respect to material, retreat, therefore, till can forging material being filled into the corner between the 1st press surface and specific sliding surface with low load.Consequently, in the 1st forge piece, suppressed the generation of the scarce material between the 1st press surface and specific sliding surface.In addition, by the 2nd mould, to having suppressed this periphery that lacks the 1st forge piece of the generation of expecting, retrain and compress end face, therefore, can obtain and not have forging defects such as lacking material, the good forge piece of shape.
In the invention of technical scheme 6, the 2nd press surface is less than the 1st press surface with respect to the gradient of specific sliding surface with respect to the gradient of specific sliding surface.That is, at the 1st mould, be provided with than the 2nd mould press surface of large gradient also, therefore, by the 1st mould, formed contour shape clearly.
In the invention of technical scheme 7, the 1st press surface forms by a plurality of that clip crest line, and crest line approaches the sliding surface being connected with one end of this crest line, and the direction just entering with respect to material retreats.In the situation that outstanding with the end of the engaging piece of the dentation of the other side's parts engagements, crest line is more clear and definite.
In the invention of technical scheme 8, the same with technical scheme 5, the 1st press surface of the 1st mould is crooked with following direction: the 1st press surface approaches specific sliding surface, with regard to the direction that more enters mould with respect to material, retreat, therefore, till can forging material being filled into the corner between the 1st press surface and specific sliding surface with low load.Consequently, in the 1st forge piece, suppressed the generation of the scarce material between the 1st press surface and specific sliding surface.In addition, by the 2nd mould, to having suppressed this periphery that lacks the 1st forge piece of the generation of expecting, retrain and compress end face, therefore, can obtain and not have forging defects such as lacking material, the good forge piece of shape.
Accompanying drawing explanation
Fig. 1 is the figure of explanation flattening process, thick molding procedure and punching operation.
Fig. 2 is the cutaway view of the 1st mould.
Fig. 3 is the enlarged drawing of 3 of Fig. 2.
Fig. 4 is the cutaway view of the 1st mould shown in Fig. 3.
Fig. 5 is the figure observing along the arrow 5 of Fig. 4.
Fig. 6 is the action diagram of the 1st mould, is also used as for the figure of the 1st operation is described.
Fig. 7 is the partial perspective view of the 1st forge piece.
Fig. 8 is the major part stereogram of the 2nd mould.
Fig. 9 is the cutaway view of the 2nd mould shown in Fig. 8.
Figure 10 is the figure observing along the arrow 10 of Fig. 9.
Figure 11 is major part cutaway view and the major part stereogram of the forge piece after the 1st forge piece and finishing.
Figure 12 is the key diagram while applying the present invention to the gear clutch of variation.
Figure 13 is the figure of the variation of explanation the 1st mould.
Figure 14 is the figure of the variation of explanation the 2nd mould.
Figure 15 is the figure that the basic principle of forging method is in the past described.
Label declaration
20,20B: the 1st mould; 25: the 1 sliding surfaces; 26,26B: the 1st press surface; 27,27B: the specific sliding surface of the 1st mould; 30: the 1 forge pieces; The engaging piece of 32: the 1 forge pieces (the 1st engaging piece); The terminal part of 33: the 1 forge pieces (the 1st terminal part); The engagement starting point of 34: the 1 forge pieces; 40,40B: the 2nd mould; 42: the 2 sliding surfaces; 43,43B: the 2nd press surface; 44,44B: the specific sliding surface of the 2nd mould; 50: forge piece; 52: the engaging piece of forge piece (the 2nd engaging piece); 53: the terminal part of forge piece (the 2nd terminal part); 54: the engagement starting point of forge piece; 1: the 1 press surface of θ is with respect to the gradient of specific sliding surface; 2: the 2 press surfaces of θ are with respect to the gradient of specific sliding surface; R1: the radius of curvature of the 1st press surface; R2: the radius of curvature of the 2nd press surface.
The specific embodiment
With reference to the accompanying drawings embodiments of the present invention are carried out to following explanation.In addition, accompanying drawing is the figure observing to the direction of label.
Embodiment
The cylinder material being shown in phantom line in (a) of Fig. 1 11 is flattened, obtain thus with the flattening part 12(flattening process shown in solid line).Then, flattening part 12 is accommodated in mould, and presses downwards by drift, thereby obtain thick profiled member 14 shown in (b), there is recess 13 in center upper portion.On this thick profiled member 14, by pierce punch, offer medium pore 15, thereby obtain punching part 16(punching operation).
Then the structure of the 1st mould of forge hot is implemented in explanation to this punching part 16.
As shown in Figure 2, the 1st mould 20 consists of the 1st mould 23 and the 1st drift 24 that enters into the 1st mould 23, and described the 1st mould 23 has centrepin 21 and recess 22.The punching part 16 that is heated to hot forging temperature is accommodated in to recess 22.Now, make centrepin 21 connect the medium pore 15 of punching part 16.
As shown in Fig. 3 of 3 enlarged drawings as Fig. 2, the 1st mould 23 possesses: the 1st sliding surface 25, and it is longitudinal wall shape, for material (the punching part 16 shown in Fig. 2), slides; And the 1st press surface 26, it is as bottom surface and press material.In addition, the 1st sliding surface 25 consists of sliding surface 25L, the 25R of left and right and the specific sliding surface 27 of inner side.
As shown in Figure 4, the 1st press surface 26 tilts to following direction (in the drawings for arrow (2)) with respect at least one specific sliding surface 27: the 1st press surface 26 approaches this specific sliding surface 27, and the direction (being arrow (1) in the drawings) that just more enters mould with respect to material retreats.In other words, in the direction that enters mould with material, cut off abreast in the cutaway view of the 1st mould 23, the 1st press surface 26 and specific sliding surface 27 angulations are obtuse angle.That is, the 1st press surface 26 inclinations are: nearly the 1st drifts of its specific sliding surface 27 side joints (Fig. 2, label 24), central side is away from the 1st drift.This inclination angle (gradient) θ 1 is angulation between the vertical direction of the direction that enters of same material and press surface (the 1st press surface 26), for example, be 15 °.
As shown in Figure 5, the lower end of the 1st press surface 26 is V word shape.That is, the 1st press surface 26 forms by central crest line 28 with from the extended inclined plane 26L of this crest line 28,26R.
According to Fig. 6, the 1st operation of the present invention is described.
As shown in Fig. 6 (a), utilize the 1st drift (Fig. 2, label 24) that the punching part 16 that is arranged at the 1st mould 23 is pressed to (hollow arrow).Because punching part 16 is pressed by the 1st drift, thereby produced flowing and flowing to horizontal direction downwards., between the 1st sliding surface 25 and material, there is friction here, therefore, from the 1st sliding surface 25(, comprised specific sliding surface 27) more close to, forge flowing of material just slower.
But the 1st press surface 26 tilts in illustrated mode, therefore, even if do not apply so large load, forge material and also can arrive the corner 29 between specific sliding surface 27 and the 1st press surface 26.
As a result, as shown in Fig. 6 (b), obtained at the 1st press surface 26 and be full of the 1st forge piece 30 of forging the form of material.That is,, even if drift pressure is low, also can by forging material, be filled into the corner 29 between specific sliding surface 27 and the 1st press surface 26 fully.
As shown in Figure 7, the 1st forge piece 30 is formed with the 1st engaging piece 32 that is equivalent to tooth forming portion at main part 31, and at the end (lower end) of the 1st engaging piece 32, is formed with the 1st terminal part 33 of V word.At the position taking shape between specific sliding surface 27 and the 1st press surface 26, that is, on the connecting portion of the outer peripheral face 32A of the 1st engaging piece 32 and the crest line 34 of end and V word shape crest line 35, do not exist and lack material, therefore, the crest line 34,35 of the 1st terminal part 33 is clear, presents clean V font.This crest line 34 is also engagement starting point.
Next the structure of the 1st forge piece 30 being implemented to the 2nd mould of finishing is described.
As shown in Figure 8, the 2nd mould 41 of the 2nd mould 40 possesses: the 2nd sliding surface 42 of longitudinal wall shape; And the 2nd press surface 43, it is as bottom surface, and the clout that compresses the 1st terminal part (Fig. 7, label 33) carries out finishing.The 2nd sliding surface 42 consists of sliding surface 42L, the 42R of left and right and the specific sliding surface 44 of inner side.
That is, the 2nd mould 40 comprises the 2nd sliding surface 42 and the 2nd press surface 43, by the 2nd sliding surface 42, retrains the 1st forge piece (Fig. 7, label 30) outer peripheral face (Fig. 7, label 32A), and by the 2nd press surface 43 compress end (terminal part (Fig. 7, label 33)).
As shown in Figure 9, the 2nd press surface 43 tilts to following direction with respect at least one specific sliding surface 44: the 2nd press surface 43 approaches this specific sliding surface 44, with regard to the direction that more enters mould with respect to material, retreats.In other words, in the direction that enters mould with material, cut off abreast in the cutaway view of the 2nd mould 41, the 2nd press surface 43 and specific sliding surface 44 angulations are obtuse angle.
The 2nd press surface 43 is θ 2 with respect to the inclination angle (gradient) of specific sliding surface 44.This inclination angle (gradient) θ 2 is angulations between the vertical direction of the direction that enters of same material and press surface (the 2nd press surface 43), for example, be 3 °.
Because this θ 2 is 3 °, the θ 1 shown in Fig. 4 is 15 °, and therefore, the 2nd press surface 43 is little with respect to the gradient θ 1 of specific sliding surface with respect to gradient θ 2 to the 1 press surfaces of specific sliding surface 27.That is, θ 2 is different from θ 1.
As shown in figure 10, the lower end of the 2nd press surface 43 is V word shape.That is, the 2nd press surface 43 forms by central crest line 45 with from the extended inclined plane 43L of this crest line 45,43R.
The major part in the cross section of the 1st forge piece 30 that (b) by Fig. 6 obtain is correctly shown by figure below.
As shown in Figure 11 (a), at the 1st forge piece 30, being formed with the 1st engaging piece 32, the 1 engaging pieces 32 is the engaging pieces with the dentation of the other side's parts engagements.As Fig. 6, Fig. 7, illustrate, at the end (lower end) of the 1st engaging piece 32, do not find slack or scarce material.
By at Fig. 8～the 2nd mould illustrated in fig. 10, the 1st such forge piece 30 being implemented to finished machined (the 2nd operation), thus forge piece 50 shown in acquisition Figure 11 (b), the formal profiled member of conduct.
For this forge piece 50, also at main part 51, being formed with the 2nd engaging piece 52, the 2 engaging pieces 52 is the engaging pieces with the dentation of the other side's parts engagements.The 2nd engaging piece 52 does not exist and lacks material at the 2nd terminal part 53 especially, and it is clean and dimensional accuracy is good.And, as shown in Figure 11 (c), by inclined plane 43L, the 43R of the 2nd mould 40 and the V word shape crest line 55 of specific sliding surface 44 moulding and the crest line 54 of end, form clearly.This crest line 54 doubles as engagement starting point.
The inventive method, by changing visual angle, also can illustrate as follows.
In the situation that thering is the 1st operation and the 2nd operation, even if exist the appearance in the 1st operation insufficient, also can in the 2nd operation, make up such moulding thought.
But, in the present invention, be devoted to carry out fully the appearance in the 1st operation.By carrying out fully the appearance in the 1st operation, successfully alleviated the burden of the 2nd operation, and obtained good forge piece.
In addition, the inventive method is suitable for having the mechanical part that forges the tooth portion forming, and be more suitable for gear clutch, but application is arbitrarily.In addition, above-mentioned embodiment is chosen from main part 31 to the side-prominent engaging piece 32 of periphery as example is illustrated, but for from main part 31 inwardly week side-prominent engaging pieces 32 moulding also can apply the present invention.In addition, be not only the gear clutch that end is V word shape, can also be applied to end and be planar gear clutch.
As shown in Figure 12 (a), end is planar gear clutch 50B to be had a plurality of (in this example being 4) end at the end face of main part 31 and is planar engaging piece 32.It is roughly trapezoidal that the terminal surface of engaging piece 32 is, and one bar limit is the crest line 34 as engagement starting point.
Such engaging piece 32 can be by mould 23 moulding shown in Figure 12 (b).
At mould 23, be provided with recess 57, press surface 26 is tilted with respect to a specific sliding surface 27, make can clearly mold at this recess 57 crest line 34 that becomes engagement starting point in the direction of rotation at gear clutch.Press surface 26 and specific sliding surface 27 have formed corner 29 in obtuse angle.Forging is expected and is reached this corner 29, has clearly formed the crest line 34 as engagement starting point.
In addition, following situation can say that to above-mentioned embodiment and this variation both sides be general: in a plurality of sliding surfaces that join with press surface, using and press surface between form as the sliding surface of the crest line of engagement starting point or and press surface between form as the sliding surface of end that meshes the crest line of starting point and get final product ((b) of Fig. 4 and Figure 12, label 27) as specific sliding surface.And, press surface is tilted in the following manner: press surface approaches this specific sliding surface, the direction that press surface just enters mould with respect to material retreats.
Then, modification of the present invention the 1st, the 2nd mould is described.
At the 1st press surface 26 illustrated in fig. 4, are the inclined-planes that tilt with angle θ 1.The 1st press surface 26 like this can also be flexure plane except non-flexure plane.By Figure 13, its concrete example is described.
As shown in figure 13, in the 1st mould 23B of the major part as the 1st mould 20B, the 1st press surface 26B from the lower end of specific sliding surface 27B with radius of curvature R 1 bending extends to the 1st mould 23B center.
; the 1st press surface 26B is crooked to following direction with respect at least one specific sliding surface 27B: the 1st press surface 26B approaches this specific sliding surface 27B, and the direction (being arrow (3) in the drawings) that just more enters mould with respect to material retreats (being arrow (4) in the drawings).
By adopting the 1st such mould 23B, can obtain the 1st forge piece of crest line 34 bendings shown in Fig. 7.
At the 2nd press surface 43 illustrated in fig. 9, are the inclined-planes that tilt with angle θ 2.The 2nd press surface 43 like this can also be flexure plane except non-flexure plane.By Figure 14, its concrete example is described.
As shown in figure 14, in the 2nd mould 41B of the major part as the 2nd mould 40B, the 2nd press surface 43B from the lower end of specific sliding surface 44B with radius of curvature R 2 bendings extends to the 1st mould 41B center.
That is, the 2nd press surface 43B is crooked to following direction with respect at least one specific sliding surface 44B: the 2nd press surface 43B approaches this specific sliding surface 44B, just gets over the direction that enters mould with respect to the 1st forge piece and retreats.
By adopting the 2nd such mould 41B, can obtain the forge piece of crest line 54 bendings shown in (c) of Figure 11.
In this modification, make radius of curvature R 1 and radius of curvature R 2 mutually different.
Be preferably set to radius of curvature R 2 < radius of curvature R 1.That is, in the 1st operation of using the 1st mould 20B to implement, make crest line 34 relatively gently crooked, in the 2nd operation of using the 2nd mould 40B to implement, obtain crooked relatively consumingly crest line 54.By making curved shape different, can obtain crooked ideally crest line 54.
Claims (8)
1. a forming method for forge piece, is characterized in that, it possesses:
The 1st operation, is used the 1st mould to form the 1st forge piece; And
The 2nd operation, the clout portion that compresses described the 1st forge piece with the 2nd mould carries out finishing,
Described the 1st mould comprises the 1st sliding surface sliding for material and presses the 1st press surface of described material, the 1st press surface tilts to following direction with respect at least one specific sliding surface: the 1st press surface approaches this specific sliding surface, with regard to the direction that more enters mould with respect to described material, retreat
Described the 2nd mould comprises the 2nd sliding surface and the 2nd press surface, by the 2nd sliding surface, retrain the outer peripheral face of described the 1st forge piece, and compressing end by described the 2nd press surface, described the 2nd press surface is different with respect to the gradient of specific sliding surface from described the 1st press surface with respect to the gradient of specific sliding surface.
2. a forming method for forge piece, is characterized in that, it possesses:
The 1st operation, is used the 1st mould to form the 1st forge piece; And
The 2nd operation, the clout portion that compresses described the 1st forge piece with the 2nd mould carries out finishing,
Described the 1st mould comprises the 1st sliding surface sliding for material and presses the 1st press surface of described material, the 1st press surface is crooked to following direction with respect at least one specific sliding surface: the 1st press surface approaches this specific sliding surface, with regard to the direction that more enters mould with respect to described material, retreat
Described the 2nd mould comprises the 2nd sliding surface sliding for described the 1st forge piece and the 2nd press surface of pressing described the 1st forge piece, the 2nd press surface is crooked to following direction with respect at least one specific sliding surface: the 2nd press surface approaches this specific sliding surface, with regard to the direction that more enters mould with respect to described the 1st forge piece, retreat
The curved shape of described the 1st press surface and described the 2nd press surface is mutually different.
3. the forming method of forge piece according to claim 1 and 2, is characterized in that, by described the 1st mould and described the 2nd mould, the engaging piece of the dentation with the engagement of the other side's parts is carried out to moulding.
4. according to the forming method of the forge piece described in claim 1,2 or 3, it is characterized in that, by described the 1st press surface and described the 2nd press surface, at described engaging piece, form terminal part, this terminal part plays a role as engagement starting point when meshing with the other side's parts.
5. a forging mould, it consists of the 1st mould and the 2nd mould, and described the 1st mould is for obtaining the 1st forge piece by forging, and described the 2nd mould is for described the 1st forge piece is carried out to formal moulding, and described forging is characterised in that with mould,
Described the 1st mould comprises the 1st sliding surface sliding for material and presses the 1st press surface of described material, the 1st press surface tilts to following direction with respect at least one specific sliding surface: the 1st press surface approaches this specific sliding surface, with regard to the direction that more enters mould with respect to described material, retreat
Described the 2nd mould comprises the 2nd sliding surface and the 2nd press surface, by the 2nd sliding surface, retrain the outer peripheral face of described the 1st forge piece, and compressing end by described the 2nd press surface, described the 2nd press surface is different with respect to the gradient of specific sliding surface from described the 1st press surface with respect to the gradient of specific sliding surface.
6. forging mould according to claim 5, is characterized in that, described the 2nd press surface is less than described the 1st press surface with respect to the gradient of specific sliding surface with respect to the gradient of specific sliding surface.
7. according to the forging mould described in claim 5 or 6, it is characterized in that, described the 1st press surface forms by a plurality of that clip crest line, and described crest line approaches the described sliding surface being connected with one end of this crest line, and the direction just entering with respect to described material retreats.
8. a forging mould, it consists of the 1st mould and the 2nd mould, and described the 1st mould is for obtaining the 1st forge piece by forging, and described the 2nd mould is for described the 1st forge piece is carried out to formal moulding, and described forging is characterised in that with mould,
Described the 1st mould comprises the 1st sliding surface sliding for material and presses the 1st press surface of described material, the 1st press surface is crooked to following direction with respect at least one specific sliding surface: the 1st press surface approaches this specific sliding surface, with regard to the direction that more enters mould with respect to described material, retreat
Described the 2nd mould comprises the 2nd sliding surface sliding for described the 1st forge piece and the 2nd press surface of pressing described the 1st forge piece, the 2nd press surface is crooked to following direction with respect at least one specific sliding surface: the 2nd press surface approaches this specific sliding surface, with regard to the direction that more enters mould with respect to described the 1st forge piece, retreat
The curved shape of described the 1st press surface and described the 2nd press surface is mutually different.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013060085 | 2013-03-22 | ||
| JP2013-060085 | 2013-03-22 | ||
| JP2014007685A JP6279909B2 (en) | 2013-03-22 | 2014-01-20 | Forging molding method and forging die |
| JP2014-007685 | 2014-01-20 |
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| CN104057004A true CN104057004A (en) | 2014-09-24 |
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| CN201410102832.4A Pending CN104057004A (en) | 2013-03-22 | 2014-03-19 | Forming method of forging piece and mold for forging |
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| CN (1) | CN104057004A (en) |
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Application publication date: 20140924 |