CN208421828U - A kind of forging die cavity surface curved surface profiling multilayered coating structure - Google Patents
A kind of forging die cavity surface curved surface profiling multilayered coating structure Download PDFInfo
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- CN208421828U CN208421828U CN201820730814.4U CN201820730814U CN208421828U CN 208421828 U CN208421828 U CN 208421828U CN 201820730814 U CN201820730814 U CN 201820730814U CN 208421828 U CN208421828 U CN 208421828U
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Abstract
The utility model relates to forging mold technical fields, more particularly to a kind of forging die cavity surface curved surface profiling multilayered coating structure and its design method, it is provided with three layers of coating being tightly engaged into forging die cavity, three layers of coating are followed successively by surface layer from outside to inside, middle layer, bottom, the outer surface on surface layer is identical as forging type chamber, the inner surface of three layers of coating is the profiling curved surface of forging type chamber, the hardness and elastic modulus of three layers of coating successively reduces within outer, through the above technical solution, the hardness of coating (especially surface layer) is higher, to improve the endurance of cavity surface；Secondly, the structure of multilayered coating makes the ability for improving mold absorption forging impact force by middle layer and bottom reduce the deflection after it is used for multiple times to improve the service life of mold, which has longer service life.
Description
Technical field
The utility model relates to forging mold technical fields, more particularly to a kind of forging die cavity surface curved surface profiling multilayer
Coat structure.
Background technique
Forging is one of the common technology of engineering goods production, and forging the mold used is the key that formed product, due to
It repeats to forge the strength of mold when forging, after a certain period of time, mold cavity will appear different degrees of geometric dimension and expand, very
To cracking at certain positions, need to repair it.In order to improve the service life of forging die, making in the prior art
When mold and repairing mould, using specialty metal or it is surface-treated in die cavity by the way of increasing material welding, to increase
Add its fatigue durability.
A kind of material is generally only used in die cavity in the prior art, mainly for increasing endurance, but how to be absorbed
Huge impact force when forging, so that forging die is not susceptible to deform after repeated multiple times use, it is existing to guarantee to forge precision
There is technology indeterminable.
Summary of the invention
The purpose of this utility model is that in view of the deficiencies of the prior art, and a kind of forging die cavity surface curved surface profiling is provided
Multilayered coating structure passes through the coat structure of multilayer and die cavity profiling, absorbs forging impact force, and that improves mold uses the longevity
Life.
The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of forging die cavity surface curved surface profiling is more
Layer coat structure, is provided with three layers of coating being tightly engaged into forging die cavity, three layers of coating be followed successively by from outside to inside surface layer, in
Layer, bottom, the outer surface on surface layer is identical with forging type chamber, the inner surface of three layers of coating for forging type chamber profiling curved surface, three layers
The hardness and elastic modulus of coating successively reduces within outer.
Preferably, three layers of coating is metal coating, and three kinds of different metals are respectively three for passing through welding and being formed
The coating of different-thickness.
Preferably, surface layer uses high rigidity wlding, hardness HRC47-52, and middle layer uses medium hardness wlding, hardness
HRC42-47, bottom use soft wlding, hardness HRC37-42.
Preferably, surface layer with a thickness of the 20% of three layers of coating overall thickness, middle layer with a thickness of three layers of coating overall thickness
30%, bottom with a thickness of the 50% of three layers of coating overall thickness.
The utility model also provides the design method of forging die cavity surface curved surface profiling multilayered coating structure, this method are as follows:
Space coordinates are established, FEM Numerical Simulation forging process is carried out, obtains Die Forging F (t) in forging process and change over time
Curve, in forging process, t1Moment metal starts to be deformed to t2It is first stage, t that moment metal, which is filled substantially with type chamber,2Moment
To t3It is second stage, t that moment metal, which is completely filled with type chamber,3Moment is to t4Forging terminates to be the phase III, and cavity surface curved surface is
Σ1: z1=f1(x, y), Σ1Upper any point M (x, y, z)；
In first stage, blank surface curved surface is Σ2: z2(t)=f2(x (t), y (t)), in t0Moment, Σ1、Σ1Coincidence part
It is divided into closed curve, equation are as follows: f1(x, y)-f2(x(t0),y(t0))=0, curve projected area on XOY plane
For S (t0), the stress for the Z-direction that M (x, y, z) point is subject to is P (x (t0),y(t0),z(t0))=F(t0)/S(t0), to Σ1
Upper any point M (x, y, z), t at the time of the available position starts to be extruded in the first stage0 、P(x(t0),y(t0),z
(t0))；
In second stage, t4The Die Forging at moment is F(t4), Σ1Projected area is S (t on XOY plane4),M(x,y,
Z) stress for the Z-direction that point is subject to is P (x (t4),y(t4),z(t4))=F(t4)/S(t4);
The calculation formula of coating thickness are as follows:
D= a*P(x(t0),y(t0),z(t0)) * (t2-t0)+b* P (x (t4),y(t4),z(t4))*( t4- t3)+c
The thickness of each coating is successively calculated by the formula to get coat structure is arrived.
The beneficial effects of the utility model are: a kind of forging die cavity surface curved surface profiling multilayered coating structure and its design side
Method, the utility model is through the above technical solutions, the coat structure with die cavity profiling due to being arranged in die cavity, and coating is (especially
Surface layer) hardness it is higher, to improve the endurance of cavity surface；Secondly, during the structure of multilayered coating to rely on
Layer and bottom improve the ability that mold absorbs forging impact force, to improve the service life of mold, reduce after it is used for multiple times
Deflection, which considers influence of the different forging processes to coating, can readily determine that the thickness of every layer of coating,
To obtain the specific structure of coating, which has longer service life.
Detailed description of the invention
Fig. 1 is the schematic diagram of the forging die cavity surface curved surface profiling multilayered coating structure of the utility model.
Fig. 2 is the change curve of forging force during closed-die forging.
Description of symbols:
1 --- surface layer 2 --- middle layer
3 --- bottom 4 --- molds
5 --- blank.
Specific embodiment
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, is not that this is practical
Novel practical range limited to this.
A kind of forging die cavity surface curved surface profiling multilayered coating structure and its design method.
Embodiment one.
As shown in Figure 1, a kind of forging die cavity surface curved surface profiling multilayered coating structure of the present embodiment, set in forging die cavity
Three layers of coating being tightly engaged into are equipped with, three layers of coating are followed successively by surface layer, middle layer, bottom, the outer surface on surface layer and forging from outside to inside
Moulding chamber is identical, and the inner surface of three layers of coating is the profiling curved surface of forging type chamber, and the hardness and elastic modulus of three layers of coating is from outer
Within successively reduce.The coat structure with die cavity profiling being arranged in the die cavity of the utility model, thus from coating to mold shape
At a hardness gradient, the hardness of coating (especially surface layer) is higher, to improve the endurance of cavity surface；Secondly,
The structure of multilayered coating to improve the ability that mold absorbs forging impact force by middle layer and bottom, to improve making for mold
With the service life, reduce the deflection after it is used for multiple times.
Further, three layers of coating is metal coating, and three kinds of different metals are respectively three for passing through welding and being formed
The coating of a different-thickness, and diameter welds to form curved surface when coating welding, rather than according to the layer-by-layer built-up welding of horizontal direction.
Further, surface layer uses high rigidity wlding, hardness HRC47-52, and middle layer uses medium hardness wlding, hardness
HRC42-47, bottom use soft wlding, hardness HRC37-42.
Embodiment two.
The present embodiment provides a kind of forging die cavity surface curved surface profiling multilayered coating of simplified design compared with embodiment one
Structure, i.e., the structure of three layers coating use simple analogy, surface layer with a thickness of the 20% of three layers of coating overall thickness, middle layer
With a thickness of the 30% of three layers of coating overall thickness, bottom with a thickness of the 50% of three layers of coating overall thickness, the program is a kind of simplification
Processing, a kind of available embodiment more preferable than the prior art, but be not optimal embodiment.
Embodiment three.
The present embodiment provides a kind of design method of forging die cavity surface curved surface profiling multilayered coating structure, this method are as follows:
Space coordinates are established, FEM Numerical Simulation forging process is carried out, obtains Die Forging F (t) in forging process and change over time
Curve, as shown in Fig. 2, including base stage and finish-forging stage in figure, mold that two stages use is different, the utility model
Design method be directed to finish-forging stage (have the blocking stage can be used for the blocking stage).
In forging process, t1Moment metal starts to be deformed to t2It is first stage, t that moment metal, which is filled substantially with type chamber,2Moment
To t3It is second stage, t that moment metal, which is completely filled with type chamber,3Moment is to t4Forging terminates to be the phase III, and cavity surface curved surface is
Σ1: z1=f1(x, y), Σ1Upper any point M (x, y, z)；
In first stage, blank surface curved surface is Σ2: z2(t)=f2(x (t), y (t)), in t0Moment, Σ1、Σ1Coincidence part
It is divided into closed curve, equation are as follows: f1(x, y)-f2(x(t0),y(t0))=0, curve projected area on XOY plane
For S (t0), the stress for the Z-direction that M (x, y, z) point is subject to is P (x (t0),y(t0),z(t0))=F(t0)/S(t0), to Σ1
Upper any point M (x, y, z), t at the time of the available position starts to be extruded in the first stage0 、P(x(t0),y(t0),z
(t0))；
In second stage, t4The Die Forging at moment is F(t4), Σ1Projected area is S (t on XOY plane4),M(x,y,
Z) stress for the Z-direction that point is subject to is P (x (t4),y(t4),z(t4))=F(t4)/S(t4);
The calculation formula of coating thickness are as follows:
D= a*P(x(t0),y(t0),z(t0)) * (t2-t0)+b* P (x (t4),y(t4),z(t4))*( t4- t3)+c
During closed-die forging, the above three stage can be divided into, the first stage shapes substantially, and metal starts to be deformed to
Technology is full of die cavity；Second stage was terminated to be completely filled with die cavity to metal by the first stage；Phase III blank becomes substantially
Indeformable rigid body, under great molding pressure, the metal of end generates flow direction and forms overlap.Three parts point in above-mentioned formula
The active force influence that three phases correspond to coating is not corresponded to.
The thickness of each coating is successively calculated by the formula to get the structure of entire coating is arrived.
Pass through the design method, it may be considered that influence of the different forging processes to coating is covered to be readily determined every layer
The thickness of layer, to obtain the specific structure of coating, which has longer service life.
The design method does not need repeated tests, for same coating metal, can select a kind of type of rule
Chamber carries out finite element analysis and test under certain forging force, selects the identical multiple points of stress in die cavity, is covered using different
Thickness degree takes the smallest thickness of deformation to be fitted song by above-mentioned formula using the deformation for detecting coating after certain number
Line obtains parameter a, b, c in above-mentioned formula, then substitutes into above-mentioned formula, available to need to forge using finite element analysis
Coating thickness of the workpiece made in forging at each point, avoids the workpiece new to each and requires to repeat to test,
Save a large amount of experimentation cost and time.
Finally it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than to this reality
With the limitation of novel protected range, although being explained in detail referring to preferred embodiment to the utility model, this field it is general
Lead to it will be appreciated by the skilled person that can be with the technical solution of the present invention is modified or equivalently replaced, without departing from this
The spirit and scope of utility model technical solution.
Claims (4)
1. a kind of forging die cavity surface curved surface profiling multilayered coating structure, it is characterised in that: be provided in forging die cavity and closely connect
The three layers of coating closed, three layers of coating are followed successively by surface layer, middle layer, bottom from outside to inside, and the outer surface on surface layer is identical as forging type chamber,
The inner surface of three layers of coating is the profiling curved surface of forging type chamber, and the hardness and elastic modulus of three layers of coating successively drops within outer
It is low.
2. forging die cavity surface curved surface profiling multilayered coating structure according to claim 1, it is characterised in that: described three layers
Coating is metal coating, and three kinds of different metals are respectively the coating for passing through three different-thickness that welding is formed.
3. forging die cavity surface curved surface profiling multilayered coating structure according to claim 1, it is characterised in that: surface layer uses
High rigidity wlding, hardness HRC47-52, middle layer use medium hardness wlding, hardness HRC42-47, and bottom uses soft wlding,
Hardness HRC37-42.
4. forging die cavity surface curved surface profiling multilayered coating structure according to claim 1, it is characterised in that: the thickness on surface layer
Degree is the 20% of three layers of coating overall thickness, middle layer with a thickness of the 30% of three layers of coating overall thickness, bottom with a thickness of three layers of coating
The 50% of overall thickness.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108595894A (en) * | 2018-05-17 | 2018-09-28 | 湖北三环锻造有限公司 | A kind of forging die cavity surface curved surface profiling multilayered coating structure and its design method |
| CN108607945A (en) * | 2018-05-17 | 2018-10-02 | 湖北三环锻造有限公司 | 3D wldings print die multilayered coating structure and coating thickness determine method |
| WO2020232775A1 (en) * | 2019-05-23 | 2020-11-26 | 重庆杰品科技股份有限公司 | Hot-forging die with conformal network structure on surface layer of cavity and preparation method therefor |
-
2018
- 2018-05-17 CN CN201820730814.4U patent/CN208421828U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108595894A (en) * | 2018-05-17 | 2018-09-28 | 湖北三环锻造有限公司 | A kind of forging die cavity surface curved surface profiling multilayered coating structure and its design method |
| CN108607945A (en) * | 2018-05-17 | 2018-10-02 | 湖北三环锻造有限公司 | 3D wldings print die multilayered coating structure and coating thickness determine method |
| CN108595894B (en) * | 2018-05-17 | 2024-02-13 | 湖北三环锻造有限公司 | Forging die cavity surface curved surface profiling multilayer coating structure and design method thereof |
| WO2020232775A1 (en) * | 2019-05-23 | 2020-11-26 | 重庆杰品科技股份有限公司 | Hot-forging die with conformal network structure on surface layer of cavity and preparation method therefor |
| US11465195B2 (en) | 2019-05-23 | 2022-10-11 | Chongqing Jiepin Technology Co., Ltd | Hot-forging die with conformal meshy structured cavity surface layer and preparation method thereof |
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