CN117600373A - A tire mold forging forming method for traction hook forgings - Google Patents
A tire mold forging forming method for traction hook forgings Download PDFInfo
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- CN117600373A CN117600373A CN202311562235.5A CN202311562235A CN117600373A CN 117600373 A CN117600373 A CN 117600373A CN 202311562235 A CN202311562235 A CN 202311562235A CN 117600373 A CN117600373 A CN 117600373A
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- forging
- blank
- preform
- die
- forming
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/72—Making machine elements hooks, e.g. crane hooks, railway track spikes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention provides a forming method for forging a die of a traction hook forging, which realizes the cooperative determination of a blank and a die cavity between the working procedures by optimally designing the structure of the traction hook forging, and carrying out square conical die design, blank structure design and forming route design based on the structure of the forging. According to the invention, by optimizing the structures of the forging and the cavity, the taper and the fillet transition of the forging are reasonably designed, so that the intermediate blank has a downward axial flow trend under the action of the anvil surface pressure and has an acceleration trend in the radial direction, and the forming problem of the boundary position of the cavity is solved. The upper part of the forging piece is subjected to downward forging and pressing through the upper anvil surface to obtain radial flow, and forging blanks are matched with the shape of the die through multidirectional forging and pressing and reverse extrusion force on the side surface to finally obtain a formed part with a reasonable structure, so that the problems of low material utilization rate, long manufacturing period, high production cost and the like are solved.
Description
Technical Field
The invention belongs to the technical field of forging, and particularly relates to a forming method for forging a tire mold of an armored vehicle traction hook forging piece.
Background
The towing hook is positioned on the armor plate of the armored vehicle and has a convex structure with a relatively large section and a relatively thin base. Such structural members are widely used in the body of armored vehicles and are generally formed by the free forging or swaging method. Because the product base is smaller, the free forging is usually selected in the production process and then machined, and because the size consistency of the forged piece formed by the free forging is poor, the free forging is convenient to form, but the machining allowance is larger, and the material utilization rate is low; if the die forging forming is selected, the mass distribution condition of the blank is difficult to determine due to the structural characteristics of the product, the die cost is obviously increased, and the manufacturing period is long; if the forming of the tire mold is adopted, the material utilization rate of the traditional circular tire is difficult to improve, if the square tire is designed, the metal in the tire mold is mainly filled into the mold cavity through radial flow during forging, but the bottom of the lower blank is easily not full due to the influence of the reverse radial force and friction force of the mold, so that instability is easily caused in the forging process, and the square four sides are difficult to fully fill. Based on this problem, it is necessary to select a combination of free forging stock distribution metal weight and taper die forging for forging forming.
Disclosure of Invention
First, the technical problem to be solved
The invention provides a forming method for forging a die of a traction hook forging piece, which aims to solve the technical problem that the bottom of the square die is difficult to fill.
(II) technical scheme
In order to solve the technical problems, the invention provides a forming method for forging a die of a draw hook forging, which comprises the following steps:
s1, optimizing a forging structure according to the structural characteristics of a product
Optimizing the adaptation degree of the shape of the forging piece and the product, determining the top length of the square cone of the forging piece according to the outer diameter of the protruding part of the product, and determining the top width of the square cone of the forging piece according to the width of the protruding part of the product; the corner part of the transition area is subjected to transition treatment by adopting a larger fillet, and the radius R of the fillet is not larger than the diameter R of the fillet;
s2, determining a forging forming process of the tire mold
Determining a die forging forming procedure according to the cooperation of the forging structure and the die shape, wherein the die forging forming procedure comprises the following steps: blanking, blank making, upsetting forming in a tire mold, trimming and checking; determining a blanking size according to the design size and the burning loss of the forging piece; determining the blank making shape of the tire membrane, and carrying out transition through a blank making process to obtain a preform;
s3, preparing a square conical fetal membrane
Designing a square conical tire mold according to the outline dimension of the forging piece, wherein a tire mold cavity cooperates with the forging piece structure;
s4, blank making
Placing the heated blank between the upper anvil surface and the lower anvil surface, and repeatedly hammering the blank to optimize a metal streamline; manufacturing a step-shaped die forging blank from the blank by adjusting the contact position of the stock surface and the blank, forging a large end, distributing materials to the forging blank according to the calculated mass percentage of the blank material, clamping and distributing materials at the position of a parting line through the upper stock surface and the lower stock surface, and forging a convex part to obtain a preform;
s5, forging and forming a tire mold
In order to ensure the plasticity of the product, the preform obtained in the step S4 is returned to the furnace and then heated to a temperature, the preform is placed in the square conical tire membrane in the step S3, the small end of the preform is placed in the middle of the tire membrane, the preform is forged through a hammer head on forging equipment, after the preform is forged in place, the tire membrane in the forging process is turned over through a clamp, the preform is forged, and the forging process is repeated until the base position of the preform is matched with the shape of the square conical tire membrane, so that the final formed part is obtained.
In step S1, the conical outer surface of the forging piece is provided with a taper, and the taper is more than or equal to the self bottom taper of the product.
Further, in step S1, r= (2-3) R.
Further, in step S3, pressing grooves for overturning operation are left on both sides of the square conical fetal membrane.
Further, in step S5, after the final molded article is obtained, the molded article is subjected to dimensional appearance inspection.
(III) beneficial effects
The invention provides a forming method for forging a die of a traction hook forging, which realizes the cooperative determination of a blank and a die cavity between the working procedures by optimally designing the structure of the traction hook forging, and carrying out square conical die design, blank structure design and forming route design based on the structure of the forging. According to the invention, by optimizing the structures of the forging and the cavity, the taper and the fillet transition of the forging are reasonably designed, so that the intermediate blank has a downward axial flow trend under the action of the anvil surface pressure and has an acceleration trend in the radial direction, and the forming problem of the boundary position of the cavity is solved. The upper part of the forging piece is subjected to downward forging and pressing through the upper anvil surface to obtain radial flow, and forging blanks are matched with the shape of the die through multidirectional forging and pressing and reverse extrusion force on the side surface to finally obtain a formed part with a reasonable structure, so that the problems of low material utilization rate, long manufacturing period, high production cost and the like are solved.
The beneficial effects of the invention include:
1. the labor-saving forging forming method is applicable to forging pieces with large cross section, thin base and small batch.
2. The method not only can obtain the high-performance forge piece, but also can reduce the generation cost, improve the material utilization rate and shorten the manufacturing period;
3. according to the method, blank making is carried out firstly through free forging, the quality distribution condition of blanks is guaranteed, and then the blanks are placed in the optimized square conical tire mould for forging forming, so that the tissue and performance superiority of the forgings can be guaranteed, the production cost can be reduced, the production efficiency can be improved through the simple tire mould with the optimized structure, the applicability of forging equipment is greatly improved, and the production cost in die forging production and the required threshold of equipment requirements are reduced.
Drawings
FIG. 1a is a front view of a forging of the present invention, FIG. 1b is a side view, and FIG. 1c is a top view;
FIG. 2a is a front view of the preform structure of the present invention, and FIG. 2b is a side view;
FIG. 3a is a front view of the tire mold structure of the present invention, and FIG. 3b is a side view;
FIG. 4 is a schematic diagram of the blank making process of the present invention;
fig. 5 is a schematic view of the final forming process of the tire die forging of the present invention.
Detailed Description
To make the objects, contents and advantages of the present invention more apparent, the following detailed description of the present invention will be given with reference to the accompanying drawings and examples.
The embodiment provides a forming method of a drawing hook forging by forging a tire mold, which specifically comprises the following steps:
s1, optimizing a forging structure according to the structural characteristics of a product
And optimizing the adaptation degree of the shape of the forging and the product so as to ensure that the metal consumption of the forging structure is the lowest. As shown in fig. 1a to 1c, the broken line in the drawing is the outline of the traction hook product, and the solid line is the outline of the forging. In order to avoid the excessively severe dimensional change of the transition area of the upper part and the lower part of the forging, each structural factor (such as the draft taper, the diameter of a fillet, the aspect ratio and the like) of the forging needs to be designed reasonably: determining the top length A1 of the square cone of the forging piece according to the outer diameter A1 of the protruding part of the product, and determining the top width B1 of the square cone of the forging piece according to the width B1 of the protruding part of the product; in order to facilitate demoulding, the conical surface of the forging piece is provided with a certain taper, and the taper is more than or equal to the bottom taper of the product; in order to prevent gnawing, the corner part of the transition area is transited by adopting a larger fillet, and the radius R of the fillet is not larger than the diameter R of the fillet, which is generally R= (2-3) R;
s2, determining a forging forming process of the tire mold
In order to save production cost and shorten manufacturing period, a forming method of forging a die is selected, and a forming procedure of forging the die is determined in a cooperative manner according to the forging structure and the shape of the die, and the forming method comprises the following steps: blanking, blank making, upsetting forming in a tire mold, trimming and checking; determining a blanking size according to the design size and the burning loss of the forging piece; determining the blank forming shape of the tire membrane, and carrying out transition through a blank forming process to obtain a preform in order to ensure that the blank is formed into a final forging, wherein the structure of the preform is shown in fig. 2a and 2 b;
s3, preparing a square conical fetal membrane
Designing a square conical tire mold according to the relevant overall dimension of the forge piece shown in fig. 1, wherein the structure of the square conical tire mold is shown in fig. 3a and 3b, pressing grooves are reserved on two sides of the square conical tire mold, and a worker can conveniently overturn the square conical tire mold by using a clamp during forging; the moulding bed cavity is cooperated with the forging structure;
s4, blank making
As shown in fig. 4, placing the heated blank between the upper anvil surface and the lower anvil surface, and repeatedly hammering the blank to optimize the metal streamline; manufacturing a step-shaped die forging blank from the blank by adjusting the contact position of the stock surface and the blank, forging a large end, distributing materials to the forging blank according to the calculated mass percentage of the blank material, clamping and distributing materials at the position of a parting line through the upper stock surface and the lower stock surface, and forging a convex part to obtain a preform;
s5, forging and forming a tire mold
In order to ensure the plasticity of the product, the preform obtained in the step S4 is returned to the furnace and then heated to a temperature, the preform is placed in the square conical tire membrane in the step S3, as shown in fig. 5, the small end of the preform is placed in the middle of the tire membrane, the preform is forged by a hammer head on forging equipment, after the preform is forged in place, the tire membrane in the forging process is turned over by a clamp, the preform is forged, the forging process is repeated until the base part of the preform is matched with the appearance of the square conical tire membrane, and a final formed part is obtained, and the dimension appearance of the formed part is checked.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (5)
1. The forming method of the drawing hook forging by the die forging is characterized by comprising the following steps of:
s1, optimizing a forging structure according to the structural characteristics of a product
Optimizing the adaptation degree of the shape of the forging piece and the product, determining the top length of the square cone of the forging piece according to the outer diameter of the protruding part of the product, and determining the top width of the square cone of the forging piece according to the width of the protruding part of the product; the corner part of the transition area is subjected to transition treatment by adopting a larger fillet, and the radius R of the fillet is not larger than the diameter R of the fillet;
s2, determining a forging forming process of the tire mold
Determining a die forging forming procedure according to the cooperation of the forging structure and the die shape, wherein the die forging forming procedure comprises the following steps: blanking, blank making, upsetting forming in a tire mold, trimming and checking; determining a blanking size according to the design size and the burning loss of the forging piece; determining the blank making shape of the tire membrane, and carrying out transition through a blank making process to obtain a preform;
s3, preparing a square conical fetal membrane
Designing a square conical tire mold according to the outline dimension of the forging piece, wherein a tire mold cavity cooperates with the forging piece structure;
s4, blank making
Placing the heated blank between the upper anvil surface and the lower anvil surface, and repeatedly hammering the blank to optimize a metal streamline; manufacturing a step-shaped die forging blank from the blank by adjusting the contact position of the stock surface and the blank, forging a large end, distributing materials to the forging blank according to the calculated mass percentage of the blank material, clamping and distributing materials at the position of a parting line through the upper stock surface and the lower stock surface, and forging a convex part to obtain a preform;
s5, forging and forming a tire mold
In order to ensure the plasticity of the product, the preform obtained in the step S4 is returned to the furnace and then heated to a temperature, the preform is placed in the square conical tire membrane in the step S3, the small end of the preform is placed in the middle of the tire membrane, the preform is forged through a hammer head on forging equipment, after the preform is forged in place, the tire membrane in the forging process is turned over through a clamp, the preform is forged, and the forging process is repeated until the base position of the preform is matched with the shape of the square conical tire membrane, so that the final formed part is obtained.
2. The method of forming a die forging as recited in claim 1, wherein in step S1, the tapered outer surface of the forging has a taper which is greater than or equal to the bottom taper of the product itself.
3. A method of forging a tire mold as recited in claim 1, wherein in step S1, r= (2-3) R.
4. The method of forming a tire mold according to claim 1, wherein in step S3, a pressing groove for turning operation is left on both sides of the square tapered tire mold.
5. A method of forging a tire mold as set forth in claim 1, wherein in step S5, after the final molded article is obtained, the molded article is subjected to dimensional visual inspection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311562235.5A CN117600373A (en) | 2023-11-22 | 2023-11-22 | A tire mold forging forming method for traction hook forgings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311562235.5A CN117600373A (en) | 2023-11-22 | 2023-11-22 | A tire mold forging forming method for traction hook forgings |
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| Publication Number | Publication Date |
|---|---|
| CN117600373A true CN117600373A (en) | 2024-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311562235.5A Pending CN117600373A (en) | 2023-11-22 | 2023-11-22 | A tire mold forging forming method for traction hook forgings |
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| CN (1) | CN117600373A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118417477A (en) * | 2024-05-30 | 2024-08-02 | 无锡派鑫航空科技有限公司 | A forming design method suitable for triangular titanium alloy die forgings |
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| CN102873237A (en) * | 2012-10-17 | 2013-01-16 | 西南铝业（集团）有限责任公司 | T-shaped forge piece blank-manufacturing processing technology and device thereof |
| CN104308057A (en) * | 2014-11-03 | 2015-01-28 | 沈阳黎明航空发动机(集团)有限责任公司 | Loose tooling forging blank forming method of long-sheet complicated die forge piece |
| CN206952066U (en) * | 2016-12-28 | 2018-02-02 | 中国第二重型机械集团德阳万航模锻有限责任公司 | The base instrument of cross forging |
| CN115673191A (en) * | 2022-11-09 | 2023-02-03 | 中国航发沈阳黎明航空发动机有限责任公司 | Die forging forming method for T-shaped thin plate forging |
-
2023
- 2023-11-22 CN CN202311562235.5A patent/CN117600373A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102873237A (en) * | 2012-10-17 | 2013-01-16 | 西南铝业（集团）有限责任公司 | T-shaped forge piece blank-manufacturing processing technology and device thereof |
| CN104308057A (en) * | 2014-11-03 | 2015-01-28 | 沈阳黎明航空发动机(集团)有限责任公司 | Loose tooling forging blank forming method of long-sheet complicated die forge piece |
| CN206952066U (en) * | 2016-12-28 | 2018-02-02 | 中国第二重型机械集团德阳万航模锻有限责任公司 | The base instrument of cross forging |
| CN115673191A (en) * | 2022-11-09 | 2023-02-03 | 中国航发沈阳黎明航空发动机有限责任公司 | Die forging forming method for T-shaped thin plate forging |
Non-Patent Citations (1)
| Title |
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| 张德欣: "《飞行器制造技术》", 31 March 2006, 哈尔滨工程大学出版社, pages: 29 - 33 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118417477A (en) * | 2024-05-30 | 2024-08-02 | 无锡派鑫航空科技有限公司 | A forming design method suitable for triangular titanium alloy die forgings |
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