CN112893729A - Method for forging branch type forge piece - Google Patents
Method for forging branch type forge piece Download PDFInfo
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- CN112893729A CN112893729A CN202110053377.3A CN202110053377A CN112893729A CN 112893729 A CN112893729 A CN 112893729A CN 202110053377 A CN202110053377 A CN 202110053377A CN 112893729 A CN112893729 A CN 112893729A
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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
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
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Abstract
The invention discloses a branch forging method, which comprises the following steps: 1. firstly measuring the volume of a main body of the forging and then measuring the volume of branches of the forging; 2. setting the volume of a preforging piece main body equal to the volume of a forging piece main body and the diameter of the preforging piece main body equal to the diameter of the forging piece main body, and calculating the height of the preforging piece main body; 3. setting the branch height of the pre-forging to be equal to the main body height of the pre-forging, keeping the branch shape of the pre-forging consistent with that of the forging, arranging a control plane, and adjusting the control plane to enable the branch volume of the pre-forging to be equal to that of the forging, so as to obtain the shape of the pre-forging; 4. forging the blank into a pre-forging piece; forging the pre-forging piece into a final forging piece; according to the invention, the branch type forge piece is divided into the preforging piece main body and the preforging piece branches, the preforging piece main body is designed firstly, and then the preforging piece branches are designed on the basis, so that the volume of the preforging piece main body and the volume of the preforging piece branches can be reasonably distributed, the forming difficulty is reduced, the forming defects are reduced, and the forge piece performance is improved.
Description
Technical Field
The invention relates to the field of metal precision plastic forming, in particular to a method for forging branch forgings.
Background
Metal press working is a forming method which is commonly used in metal plastic volume forming, mainly a forging process, and forging forming can be divided into different forming types according to different classification methods. The die forging is a forging method for obtaining a forging by utilizing a die to form a blank on the traditional equipment, and when the method is used for forming the metal forging, the size precision of the forging is high, the machining allowance is small, and the production efficiency is high.
The die forging forming can be divided into open die forging and closed die forging according to a forming method, the open die forging is a traditional forging forming method, after forming, burrs are generated around a forged piece, trimming is needed to obtain accurate size, and after trimming, a metal streamline obtained by metal pressure processing is cut off, so that the fatigue resistance and corrosion resistance of the forged piece are reduced. In order to overcome the defect, the forming of the precision forging mainly adopts closed die forging, the requirement on the metal volume is strict, and particularly when the complex branch piece is formed, the metal filling difficulty at the end part of the branch is large, the flow control is poor, and the one-step forming is difficult, so the forming can be carried out by two steps of pre-forming and final forming. The forging forming effect can be improved to a certain extent, and the forming defects are reduced.
When the preformed pieces are arranged for different forgings, the volume distribution method is different, the forming difficulty of different forgings is different, and a unified forming method is difficult to form. When the branch type forge piece, especially the complex branch type forge piece, is formed, a proper volume distribution scheme does not exist at present, and the defects of insufficient metal filling, large forming difficulty, large forming defect, poor forge piece performance and the like exist in the forging forming process.
Disclosure of Invention
The invention aims to provide a branch forging method to solve the problems in the prior art. The method mainly comprises the steps of dividing the pre-forging into a pre-forging main body and pre-forging branches during distribution, designing the pre-forging main body, and designing the pre-forging branches on the basis of the pre-forging main body, so that the volume of the pre-forging main body and the volume of the pre-forging branches can be reasonably distributed, the forming difficulty is reduced, the forming defects are reduced, and the forging performance is improved.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a branch forging method, which comprises the following steps:
(1) the volume of the forging is divided and measured, and the volume of the main body of the forging and the volume of the branches of the forging are measured;
(2) setting the volume of a main body of the preforging piece to be equal to the volume of the main body of the forging piece, setting the diameter of the main body of the preforging piece to be equal to the diameter of the main body of the forging piece, and calculating the height of the main body of the preforging piece;
(3) setting the branch height of the pre-forging to be equal to the main body height of the pre-forging, keeping the branch shape of the pre-forging consistent with that of the forging, setting a control plane of the pre-forging, and adjusting the control plane to enable the branch volume of the pre-forging to be equal to that of the forging to obtain the shape of the pre-forging; the control plane comprises a main body upper end face control plane, a main body lower end face control plane, a branch upper end face control plane, a branch lower end face control plane and a branch outer end face control plane;
(4) forging the blank into a pre-forging piece;
(5) and forging the preforging piece into a final forging piece.
Preferably, the volume of the forged piece is measured in three-dimensional software to obtain the volume of a blank piece, and blanking is performed;
preferably, the volume of the blank is obtained by processing the volume invariant principle according to metal pressure, and considering the metal burning loss.
Preferably, in the step (2), the forging main body is cylindrical, the number of the forging branches is at least two, and the volumes or the shapes of the at least two forging branches are different.
Preferably, when the volumes or the shapes of the branches of the forged piece are different, the volumes of the branches of the forged piece are respectively measured.
Preferably, in the step (3), the control plane of the lower end face of the branch is equal to the control plane of the lower end face of the main body, and when the control plane is adjusted, the control plane of the upper end face of the branch and the control plane of the outer end face of the branch are adjusted.
Preferably, the obtained pre-forging is chamfered in step (3).
Preferably, when the branches of the forged piece are provided with round corners, the size of the chamfer of the branches of the pre-forged piece is adjusted according to the round corners.
Preferably, after chamfering, fine adjustment is performed on the control plane again, and the volume of the pre-forged piece is equal to that of the forged piece.
Compared with the prior art, the invention has the following technical effects:
(1) according to the invention, the pre-forging piece is divided into the pre-forging piece main body and the pre-forging piece branches, and in the forging and forming process, the metal filling difficulty at the ends of the branches is large, and the flow control is poor, namely, the flowability of the main body and the branches is different;
(2) after the size of the main body of the pre-forging piece is determined, the shape of the branch of the pre-forging piece is kept consistent with that of the branch of the forging piece, the control plane of the branch of the pre-forging piece is arranged, the volume of the branch of the pre-forging piece is equal to that of the branch of the forging piece by adjusting the control plane, so that the shape of the pre-forging piece is finally obtained, the control plane can be adjusted by utilizing the function of three-dimensional software, the operation is simple and convenient, the measurement precision is high, and the forming quality and precision of the forging piece can be finally ensured;
(3) according to the characteristics of the metal flow of the branch type forging, the control plane on the upper end face of the branch and the control plane on the outer end face of the branch are selected as adjustable control planes, so that the lower end face and the side end face of the branch of the pre-forging are kept consistent with the forging as much as possible, and the length and the height of the branch of the pre-forging are adjusted only by adjusting the outer end face and the upper end face of the branch of the pre-forging, so that the branch metal can flow conveniently in the forging forming process, a die cavity can be filled, and the forming precision and the quality of the forging are ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic view of a branch type forging;
FIG. 2 is a schematic illustration of a blank;
FIG. 3 is a schematic view of a pre-forge;
FIG. 4 is a schematic view of each control plane of a pre-forging;
FIG. 5 is a schematic view of control planes in another direction of the blocker;
FIG. 6 is a schematic view of a finish forge;
FIG. 7 is another schematic view of the finish forge in another orientation;
wherein, 1, forging main body; 2. a branch of the forging; 10. the upper end surface of the main body controls the plane; 20. the lower end surface of the main body controls the plane; 30. the upper end surface of the branch controls the plane; 40. the lower end surface of the branch controls the plane; 50. the outer end surface of the branch is provided with a control plane; 100. a blank member; 200. pre-forging; 201. a pre-forge body; 202. a pre-forged branch; 221. a first branch of the pre-forged piece; 222. a second branch of the pre-forging piece; 223. a third branch of the pre-forging piece; 224. a fourth branch of the pre-forged piece; 300. finishing the forged piece; 301. a finish forge body; 302. a finish forged branch; 321. a first branch of a final forging piece; 322. a second branch of the final forging piece; 323. a third branch of the final forging piece; 324. and the fourth branch of the final forging piece.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a branch type forging method to solve the problems in the prior art. The method mainly comprises the steps of dividing the pre-forging into a pre-forging main body and pre-forging branches during distribution, designing the pre-forging main body, and designing the pre-forging branches on the basis of the pre-forging main body, so that the volume of the pre-forging main body and the volume of the pre-forging branches can be reasonably distributed, the forming difficulty is reduced, the forming defects are reduced, and the forging performance is improved.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention provides a branch type forging piece forging method, as shown in fig. 1-7, during forging, the branch type forging piece is divided into a blank piece 100, a pre-forging piece 200 and a finish forging piece 300, namely, the pre-forging piece 200 is firstly processed, then the pre-forging piece 200 is forged and processed into the finish forging piece 300, when the pre-forging piece 200 is designed, the volumes of a pre-forging piece main body 201 and the pre-forging piece branches 202 need to be reasonably distributed, the branch type forging piece comprises a main body and branches connected to the main body, and in the forging forming process, the metal filling difficulty at the ends of the branches is large, the flow control is poor, namely, the main body and the branches have different flowability, and the main body and the branches can be distinguished; when the volume of the pre-forging piece 200 is distributed, the difference of the flowability of the pre-forging piece main body 201 and the flowability of the pre-forging piece branch 202 is considered, and according to the characteristic that the main structure of the pre-forging piece is simpler than that of the forging piece branch, the volume of the pre-forging piece main body can be determined firstly, and then the volume of the pre-forging piece branch is determined, so that the volume of the pre-forging piece main body and the volume of the pre-forging piece branch can be reasonably distributed, the forming difficulty can be reduced, the forming defect can be reduced, and the performance of the forging piece can be improved.
The method comprises the following steps:
(1) measuring the volume of the forged piece: designing various parameters of the forging according to requirements, obtaining a solid sample or a virtual graph of the forging, and then carrying out segmentation measurement on the volume of the forging, wherein the forging comprises a forging main body 1 and forging branches 2, and the number of the forging branches 2 can be one, two or more; during measurement, the volume of a forging main body and the volume of a forging branch are respectively measured, wherein when the forging is a solid sample, the forging can be a solid sample processed by a certain machining means, or a solid sample printed by a 3D printing technology, and when the volume is measured, the conventional measuring tools (such as a ruler, a caliper, a micrometer and other tools) can be used for measuring and calculating, or the three-dimensional coordinate instrument and other equipment can be used for measuring and calculating; when the forging is a virtual graph, the virtual graph can be obtained by drawing through three-dimensional software, and when volume measurement is carried out, measurement can be carried out in the three-dimensional software by directly utilizing a measurement tool carried by the three-dimensional software;
(2) bulk volume dispensing: for the branch type forging, the forging main body 1 and the forging branches 2 have obvious difference in appearance shape, generally, the structure of the forging main body 1 is simpler than that of the forging branches 2, and the boundary is easy to determine, for example, when the forging main body 1 is cylindrical, the contour boundary of the forging main body 1 can be directly determined according to the outer wall of the forging main body 1 between the forging branches 2, so that the volume of the forging main body can be easily determined, and on the basis, the volume of the forging branches can be easily determined according to the determined boundary; because the structure of the forging branch 2 is complex, if the volume of the forging branch is determined first, the volume of the forging branch cannot be determined because the boundary between the forging branch 2 and the forging main body 1 cannot be determined, and further the volume of the forging main body cannot be determined;
setting the volume of the main body of the pre-forging to be V2Diameter D2Height of H2The forging body volume measured or calculated in the step (1) is V3Diameter D3Height of H3Setting the main body volume V of the pre-forging2Equal to the main volume V of the forging3I.e. V2＝V3And the diameter D of the main body of the pre-forging piece is set2Equal to the forging main body diameter D3I.e. D2＝D3At this time, the height H of the body of the pre-forging can be calculated2To thereby obtain the dimensions and outer dimensions of the pre-forged body 201Form parameters; it should be noted that, because there may be a boss and a groove on the upper and lower sides of the forging, so H3The pre-forging piece 200 is large, and the purpose of the pre-forging piece is mainly to facilitate the volume distribution of the asymmetric branches, so that the pre-forging piece main body 201 can be directly arranged into a cylinder;
(3) branch volume distribution: after the overall dimension of the pre-forging piece main body 201 is determined, the overall dimension of the pre-forging piece branch 202 can be determined according to the principle that the volume of the pre-forging piece branch is equal to that of the forging piece branch, and the volume of the pre-forging piece branch 201 with different volumes is required to be distributed because the shapes or volumes of the forging piece branches 2 are different, the metal flow rates are different in the forming process, and the filling speeds and filling degrees of different forging piece branches 2 are different;
firstly, setting the height of the branch of the pre-forging to be equal to the height of the main body of the pre-forging, wherein the shape of the branch of the pre-forging is consistent with the shape of the branch of the forging, and the shape is understood to be a general appearance profile shape, such as the end-forging branch 302 of the end-forging 300 shown in fig. 6-7, and the rounded corners at the ends of the first branch 321, the second branch 322 and the third branch 323 of the end-forging can be temporarily disregarded, so as to abstract the whole to the shape of the branch 202 of the pre-forging 200 shown in fig. 3 (corresponding to the first branch 221, the second branch 222 and the third branch 223 of the pre-forging, respectively); then, setting a control plane of the pre-forging branch 202, and adjusting the control plane to make the volume of the pre-forging branch equal to the volume of the forging branch to obtain the shape of the pre-forging, wherein as shown in fig. 4-5, the control plane comprises a main body upper end surface control plane 10, a main body lower end surface control plane 20, a branch upper end surface control plane 30, a branch lower end surface control plane 40 and a branch outer end surface control plane 50, that is, the branch volume is adjusted by adjusting each control plane; in the specific operation process, if the solid sample is a solid sample, performing material increasing or material reducing processing on the corresponding plane to change the control plane, wherein the branch volume is correspondingly changed at the moment, and then measuring the branch volume again by using the measuring method in the step (1) to obtain the adjusted volume; if the graph is a virtual graph, the adjustment of the control plane can be performed in three-dimensional software, specifically, after the control plane set in the preamble is modified, the volume of the subsequent branches is adjusted accordingly, and further specifically, after the CATIA software is taken as an example for operation, the characteristic tree is sequenced according to the operation sequence, if the plane operation set in the preamble of the characteristic tree is changed, the subsequent operation is changed accordingly based on the volume of the plane, so that the branch volume is adjusted, the numerical value of the branch volume can be directly obtained in the software and then compared with the branch volume of the forged piece, if the volume is equal to the branch volume of the forged piece, the adjustment can be stopped, if the volume of the forged piece is larger than the branch volume, the adjustment in the direction of reducing the volume is required, and if the volume of the forged piece is smaller than the branch volume of the forged piece, the adjustment in the direction of increasing the volume is required; after the steps, the shape and size parameters of the pre-forging branch 202 are finally obtained;
(4) a corresponding die can be manufactured according to the shape and size parameters of the pre-forging piece 200, the die is used for die forging, the blank piece 100 is forged into the pre-forging piece 200, and as shown in fig. 2, the blank piece 100 can be blanked into a cylinder shape;
(5) and manufacturing a forging die according to the designed shape and size parameters, and forging the pre-forging piece 200 into the final forging piece 300 by using the die.
In order to reduce the difficulty of the process and improve the accuracy of data, the process of obtaining the volume of the forged piece can be carried out in three-dimensional software, the volume of the forged piece of the virtual graph forged piece is measured and calculated in the three-dimensional software to obtain the volume of the forged piece, then the volume of a blank piece is obtained from the volume of the forged piece according to the grasped forging experience, blanking is carried out, the blank piece can be directly blanked into regular shapes such as a cylinder shape and a square shape during blanking, the regular shapes are convenient for calculating the volume, and the accuracy of the blanking volume can be further ensured;
specifically, the principle that the volume is unchanged can be processed according to metal pressure when the volume of a blank is obtained, that is, metal is not easily compressed, and the volume of the metal is basically unchanged after various deformations, so that the volume of a forging can be directly equal to the volume of the blank, actually, according to the forging experience and the actual processing condition, a certain burning loss amount is inevitable in the forging process, in order to further ensure or improve the forging precision, the metal burning loss amount needs to be considered when the blank 100 is blanked, that is, the volume of the metal burning loss amount is added on the basis of the volume of the forging when blanking is carried out, and the numerical value of the metal burning loss amount can be obtained through calculation according to the volume of the forging.
As shown in fig. 1, the branch-type forging in step (2) may include a forging main body 1 and forging branches 2, the forging branches 2 are distributed outside the main body 1, and the volume and shape of each forging branch 2 may be completely the same or may be different, where the forging main body 1 may be cylindrical, the forging branches 2 may be at least two, and may be three, four or more, when there are two, the shapes or volumes of the two forging branches 2 may be different, and when there are more than two, the shapes or volumes of at least two forging branches 2 may be different; because the shapes or volumes of the forging branches 2 are different, the metal flow rates are different in the forging forming process, and the filling speeds and the filling degrees of the forging branches 2 are different, so that the forging branches 2 with different shapes or volumes need to be subjected to volume distribution, in other words, after the forging branches 2 with different shapes or volumes are subjected to volume distribution, the filling speeds and the filling degrees of the forging branches 2 can be kept consistent in the forging process, and therefore the forming effect of the forging can be improved, and the forming defects are reduced.
If the shapes of the forging branches 2 are different, the volumes of the forging branches need to be measured respectively, and each pre-forging branch is adjusted when the control plane is adjusted, so that the volume of each pre-forging branch is equal to the volume of the corresponding forging branch.
In the step (3), the branch lower end control plane 40 can be set to be equal to the main body lower end control plane 20, that is, when the branch lower end control plane 40 is adjusted, the main body lower end control plane 20 is correspondingly adjusted, when the branch lower end control plane 40 is not adjusted, the main body lower end control plane 20 is also kept still, for the pre-forged piece 200, because the pre-forged piece 200 is forged by an upper die and a lower die, the pre-forged piece 200 is placed on the lower die, the lower surface and the side surface of the pre-forged piece branch 202 are kept consistent with the forged piece, which is better for forming, therefore, when the control plane is adjusted, only the branch length and the branch height of the pre-forged piece need to be adjusted by adjusting the branch outer end control plane 50 and the branch upper end control plane 30, and the branch length 201 is less than the branch length of the forged piece 301, therefore, the branches 201 of the pre-forging piece will continue to extend in the length direction during forging, and on the basis that the branches 202 of the pre-forging piece adopt different volume distributions, the different branches 202 of the pre-forging piece can keep consistent forging forming effect during forging.
And (3) chamfering the obtained pre-forged piece 200, wherein the chamfering can be divided into edge chamfering and arc chamfering, the edge chamfering is performed on sharp-angled edges, and the arc chamfering is adaptive chamfering performed at corresponding positions according to the shape of the forged piece so as to be closer to the shape of the forged piece and be more convenient for metal flow forming.
As shown in fig. 6-7, a part of the final forging branches 302 in the final forging 300 (the same forging) is provided with a fillet at the end, at this time, a proper chamfer needs to be provided at a position corresponding to the pre-forging branch 202 of the pre-forging 200 shown in fig. 3, if the size of the fillet is large, the chamfer size of the pre-forging branch 202 is correspondingly increased, and if the size of the fillet is small, the chamfer size of the pre-forging branch 202 is correspondingly decreased.
After chamfering, because the pre-forging piece 200 loses part of the volume, the volume of the pre-forging piece needs to be adjusted again, that is, the control plane needs to be finely adjusted again to ensure that the volume of the pre-forging piece is equal to the volume of the forging piece, it needs to be noted that aiming at different ways (solid samples or virtual graphs) obtained by the pre-forging piece 200, the chamfering can be mechanical processing or operation in three-dimensional software, if the machining mode is adopted, material adding processing (adjusting the control plane) can be carried out after chamfering, and the volume of the pre-forging piece is determined to be equal to the volume of the forging piece after volume measurement and calculation through the measuring means in the step (1); if the mode of operation in the three-dimensional software is adopted, the control plane can be adjusted towards the direction of volume increase after chamfering, the volume of the obtained pre-forging piece is measured in the three-dimensional software, and finally the result that the volume of the pre-forging piece is equal to the volume of the forging piece is obtained.
The invention takes a cross-shaped asymmetric branch piece with four forging branches 2 as an example to introduce the method as follows:
as shown in fig. 6-7, three of the forging branches 2 have the same shape and volume, one forging branch 2 has a smaller volume, the upper surface of the forging branch is a plane, the lower surface of the forging branch is an inclined surface, the height of the forging branch 2 is unequal to that of the forging main body 1 (which is equal to that of the finish forging main body 301), and the total volume of the forging is VGeneral assemblyThe main volume of the forging is VMain bodyThe volume of the three equal branches of the forging is VBig (a)A smaller forged branch with a volume of VSmall(ii) a During forming, the pre-forging piece 200 is designed according to the final forging piece 300, so that the pre-forging piece main body 201, the three large pre-forging piece branches 202 and the like are equal in height, the pre-forging piece main body 201 is a cylindrical piece, the diameter of the pre-forging piece main body is the same as that of the forging piece main body, and the pre-forging piece main body can be equal to the forging piece main body in volume (V)Preliminary body＝VMain body) Obtaining the height of the main body of the pre-forging piece; setting a control plane in the three-dimensional software, and designing the pre-forging branch 202 by combining a forging piece on the basis of the control plane, wherein the root of the pre-forging branch 202 is equal to the height of the forging piece so as to avoid the influence of a fillet on forming; finally, the control plane is adjusted to ensure that the branch volume of the preforging piece and the branch volume (V) of the forging piecePre-large ═VBig (a)、VPre-reduction ═VSmall) The large pre-forging part branch 202 comprises a pre-forging part first branch 221, a pre-forging part second branch 222 and a pre-forging part third branch 223, and the small pre-forging part branch 202 comprises a pre-forging part fourth branch 224; the large finish forging branch 302 comprises a finish forging first branch 321, a finish forging second branch 322 and a finish forging third branch 323, and the small finish forging branch 302 comprises a finish forging fourth branch 324; chamfering is carried out to obtain a pre-forged piece 200; the process step of obtaining the final geometric dimension of the forging in the die forging process (except the process steps of bending, twisting and the like which are needed to be added after the finish forging of a few forgings) is finish forging, and the pre-forging piece 200 or the blank piece 100 is forged into the final shape of the forging.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (9)
1. A branch forging method is characterized in that: the method comprises the following steps:
(1) the volume of the forging is divided and measured, and the volume of the main body of the forging and the volume of the branches of the forging are measured;
(2) setting the volume of a main body of the preforging piece to be equal to the volume of the main body of the forging piece, setting the diameter of the main body of the preforging piece to be equal to the diameter of the main body of the forging piece, and calculating the height of the main body of the preforging piece;
(3) setting the branch height of the pre-forging to be equal to the main body height of the pre-forging, keeping the branch shape of the pre-forging consistent with that of the forging, setting a control plane of the pre-forging, and adjusting the control plane to enable the branch volume of the pre-forging to be equal to that of the forging to obtain the shape of the pre-forging; the control plane comprises a main body upper end face control plane, a main body lower end face control plane, a branch upper end face control plane, a branch lower end face control plane and a branch outer end face control plane;
(4) forging the blank into a pre-forging piece;
(5) and forging the preforging piece into a final forging piece.
2. The branch forging method according to claim 1, characterized in that: and measuring the volume of the forged piece in three-dimensional software to obtain the volume of a blank piece, and blanking.
3. The branch forging method according to claim 2, characterized in that: and processing the volume of the blank piece according to the metal pressure according to the principle that the volume is not changed, and considering the metal burning loss.
4. The branch forging method according to claim 2, characterized in that: in the step (2), the forging main body is cylindrical, at least two branches of the forging are provided, and the volumes or the shapes of the at least two branches of the forging are different.
5. The branch forging method according to claim 4, wherein: and when the volumes or the shapes of the branches of the forged piece are different, the volumes of the branches of the forged piece are respectively measured.
6. The branch forging method according to claim 4, wherein: and (4) in the step (3), the branch lower end surface control plane is equal to the main body lower end surface control plane, and when the control plane is adjusted, the branch upper end surface control plane and the branch outer end surface control plane are adjusted.
7. The branch type forging piece forging method according to any one of claims 1 to 6, characterized in that: and (4) chamfering the obtained pre-forged piece in the step (3).
8. The branch forging method according to claim 7, characterized in that: and when the forged piece branches are provided with fillets, the chamfer size of the pre-forged piece branches is adjusted according to the fillets.
9. The branch forging method according to claim 7, characterized in that: and after chamfering, finely adjusting the control plane again to ensure that the volume of the pre-forged piece is equal to that of the forged piece.
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| CN202110053377.3A Pending CN112893729A (en) | 2021-01-15 | 2021-01-15 | Method for forging branch type forge piece |
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