CN111014553B - Forging method for controlling size angle of irregular triangular rough shape - Google Patents

Forging method for controlling size angle of irregular triangular rough shape Download PDF

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Publication number
CN111014553B
CN111014553B CN201911240920.XA CN201911240920A CN111014553B CN 111014553 B CN111014553 B CN 111014553B CN 201911240920 A CN201911240920 A CN 201911240920A CN 111014553 B CN111014553 B CN 111014553B
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China
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rough
longitudinal axis
moulding bed
forging
beta
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CN201911240920.XA
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CN111014553A (en
Inventor
苏丽芬
安苏娟
张瑞丽
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Shaanxi Hongyuan Aviation Forging Co Ltd
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Shaanxi Hongyuan Aviation Forging Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00Details of machines for forging, pressing, or hammering
    • B21J13/02Dies or mountings therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/002Hybrid process, e.g. forging following casting

Abstract

The invention relates to a forging method for controlling the size angle of an irregular triangular rough shape, which comprises the following steps: step 1: designing a rough shape according to the shape characteristics of a die forging of an irregular oblique triangle, wherein the rough shape is an irregular triangle body, the longitudinal axis of the rough shape with a triangular section is taken as a reference, the included angles between two side edges of the triangle and the longitudinal axis are respectively alpha and beta, alpha is not equal to beta, the lengths of the two side edges are respectively L1 and L2, and L1 is not equal to L2; step 2: designing a moulding bed according to the size of the rough model, wherein the bottom of a moulding bed cavity is provided with an angle epsilon, and the included angles between two sides of the moulding cavity and the longitudinal axis of the rough model with the triangular section are gamma and delta respectively; and step 3: the method is characterized in that an original bar stock is forged into a square body, one corner of the square body is placed into a moulding bed, a hammer head is used for pressing down to enable the blank to be distributed in the moulding bed to form a rough form with two side edges forming alpha and beta angles with the longitudinal axis as a reference.

Description

Forging method for controlling size angle of irregular triangular rough shape
Technical Field
The invention relates to the production of an irregular triangular rough pattern with material distribution accuracy in a moulding bed.
Background
The shape and size of the pierced billet directly influence the forming of the die forging, the forming method is particularly important for the die forging with large fall of the sealing ribs and the high-low ribs, the dimensions and angles of the pierced billet are reasonably distributed, the forming of the die forging with the sealing ribs is ensured, and the pre-forging die is saved.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: (1) designing a rough model; (2) designing a forging barred forming die.
The technical scheme of the invention is as follows: a novel forging method of a loose tooling forging block is provided, which comprises the following specific contents:
the invention discloses an irregular oblique triangular die forging, which is characterized in that the surface is provided with closed ribs, the height and the drop of the ribs are large, in order to directly die forge and form the die forging without using a pre-forging die after forging, a rough form with accurate size and angle is needed, in order to forge the rough form, a die is needed to reasonably distribute materials, according to the design of a common die, the internal structural size of a cavity of the common die is consistent with the size of the rough form, but the die can not distribute materials according to the shape of the cavity of the die, particularly, the unequal angles at two sides can not be ensured by taking the axis of the rough form with a triangular section as a reference, and the design scheme provided by the invention is provided for the purpose.
Step 1: designing a rough shape according to the shape characteristics of the forged piece, wherein the rough shape is designed to be an irregular triangle and is provided with grooves on the surface, the triangular rough shape is based on a longitudinal axis, the included angles between two sides of the triangle and the longitudinal axis are respectively alpha and beta, alpha is not equal to beta, the lengths of the two sides are respectively L1 and L2, and L1 is not equal to L2 (the rough shape is shown in figure 1).
Step 2: the forming die is designed according to the size of a rough form, alpha in the rough form is not equal to beta, a blank cannot be divided according to the shape of a forming cavity of the forming die according to the design of a common forming die (shown in figure 2), particularly, the angle taking an axis as a reference cannot be guaranteed, therefore, the novel forming die is invented, the bottom of the forming die is provided with an epsilon forming die, included angles gamma and delta between two sides of the forming cavity and a longitudinal axis are gamma and delta, gamma is less than alpha, delta is less than beta, gamma is not equal to beta, and epsilon is in a correlation relation with gamma and delta (the novel forming die is shown in figure 3).
And step 3: and (3) forging the bar stock to be square, distributing the material in a forming die, and forming a required angle.
And 4, step 4: pressing with a pressing plate to form a step on the rough triangular section.
And 5: the barren type is integrally formed by flat beating on the hammer anvil.
The invention has the beneficial effects that: through the design of the new moulding bed, the angle and the size of the required barren model during die forging are achieved, the situation that the production of the barren model by using the common moulding bed cannot guarantee the repeated barren model shaping is reduced, the blank making speed is accelerated, the accuracy of the barren model size is improved, and the cost for manufacturing the pre-forging die can be saved.
Drawings
FIG. 1 is a schematic drawing of a block type.
Fig. 2 is a schematic view of a conventional tire mold.
FIG. 3 is a schematic view of a tire mold of the present invention.
Detailed Description
The invention is explained in more detail below by means of specific examples of implementation:
a forging method for controlling the size angle of an irregular triangular rough shape is characterized in that a blank is manufactured by adopting a forming die, wherein the bottom of a forming die cavity and the surface of the forming die, which is in contact with a lower hammer anvil, form a certain angle, and the angle has relevance with the required angle of the rough shape of the designed forming die.
The method comprises the following steps: step 1: designing a rough shape according to the shape characteristics of a die forging of an irregular oblique triangle, wherein the rough shape is an irregular triangle body, the longitudinal axis of the rough shape with a triangular section is taken as a reference, the included angles between two side edges of the triangle and the longitudinal axis are respectively alpha and beta, alpha is not equal to beta, the lengths of the two side edges are respectively L1 and L2, and L1 is not equal to L2; step 2: designing a moulding bed according to the size of a rough model, wherein the bottom of a moulding bed cavity is provided with an angle epsilon, the included angles between two side edges of the moulding bed cavity and the longitudinal axis of the rough model with a triangular section are gamma and delta respectively, wherein gamma is less than alpha, delta is less than beta, and gamma is not equal to delta; and step 3: forging an original bar stock into a square, putting one corner of the square into a moulding bed, pressing down by a hammer head to divide the blank in the moulding bed to form a rough shape with the longitudinal axis as a reference and two side edges forming alpha and beta angles with the longitudinal axis respectively; and 4, step 4: flattening the upper end surface of the pierced billet by using an upper hammer anvil; and 5: pressing a step on the rough triangular section by using a pressing plate with an arc contact surface with the blank after the blank is discharged from the forming die; step 6: the hammer anvil is integrally flattened in the direction vertical to the barren type triangular section.
In the step 1, the barren section is an irregular triangle and the surface is provided with a groove; in the step 2, the relationship between epsilon and gamma and delta is as follows: the raw model is made of 0Cr17Ni4Cu4Nb, and the tire mold adopts the following materials: 5 CrNiMo.
The specific scheme is as follows:
the size and the angle of the rough shape forged by the invention meet the design requirements, the rough shape is directly formed in a finish forging die without a preforging die, the rough edges of the forged piece are uniformly distributed after forging, and the narrow rib position has no folding phenomenon.
According to the invention, the blank is manufactured by adopting the forming die, the bottom of the forming die cavity of which forms an angle with the plane of the forming die, and the angle has a certain correlation with the required angle of the rough form, and the rough form is produced by adopting the forming die, so that the material utilization rate is improved to the maximum extent, and the size of the rough form is ensured.
The irregular triangular rough form is made of 0Cr17Ni4Cu4Nb material, the forging rough is completed by one heating, the rough form distribution is important, the size and the angle of each part are related to the control of the forming and the rib penetrating defects of a die forging, and the rough form forging adopts the forging method of the die mould.
Step 1: according to the shape and the size of the die forging, the rough shape is designed to be irregular triangle, and the surface is groove-shaped.
Step 2: selecting the specification and length of the bar stock, and forging into a square shape.
And step 3: and putting a square corner into the cavity of the moulding bed, and pressing the block mould into the cavity of the moulding bed by using an upper hammer anvil until the hammer anvil is contacted with the moulding bed.
And 4, step 4: and (4) taking the rough form out of the mould, and pressing the surface of the rough form out of the groove by using a pressing plate.
And 5: the barren shape is integrally flattened on the hammer anvil.

Claims (5)

1. A forging method for controlling the size angle of an irregular triangular rough shape is characterized in that a forming die is adopted for blank making, the bottom of a cavity of the forming die and the anvil surface of a lower hammer in contact with the appearance of the forming die form a certain angle, and the angle has an incidence relation with the required angle of the rough shape; the method comprises the following steps: step 1: designing a rough shape according to the shape characteristics of a die forging of an irregular oblique triangle, wherein the rough shape is an irregular triangle body, the longitudinal axis of the rough shape with a triangular section is taken as a reference, the included angles between two side edges of the triangle and the longitudinal axis are respectively alpha and beta, alpha is not equal to beta, the lengths of the two side edges are respectively L1 and L2, and L1 is not equal to L2; step 2: designing a moulding bed according to the size of a rough model, wherein the bottom of a moulding bed cavity is provided with an angle epsilon, the included angles between two side edges of the moulding bed cavity and the longitudinal axis of the rough model with a triangular section are gamma and delta respectively, wherein gamma is less than alpha, delta is less than beta, and gamma is not equal to delta; and step 3: forging an original bar stock into a square, putting one corner of the square into a moulding bed, pressing down by a hammer head to divide the blank in the moulding bed to form a rough shape with the longitudinal axis as a reference and two side edges forming alpha and beta angles with the longitudinal axis.
2. The forging method as recited in claim 1, wherein the cross section of the pierced billet in the step 1 is an irregular triangle and the surface is grooved.
3. The forging method as recited in claim 1, wherein epsilon in step 2 is related to γ and δ in the following relationship: i δ - γ | ═ epsilon.
4. The forging method as recited in claim 1, further comprising: and 4, step 4: flattening the upper end surface of the pierced billet by using a hammer; and 5: pressing a step on the rough triangular section by using a pressing plate with an arc contact surface with the blank after the blank is discharged from the forming die; step 6: the hammer anvil is integrally flattened in the direction vertical to the barren type triangular section.
5. The forging method as recited in claim 1, wherein the rough form is made of 0Cr17Ni4Cu4Nb, and the die is made of: 5 CrNiMo.
CN201911240920.XA 2019-12-06 2019-12-06 Forging method for controlling size angle of irregular triangular rough shape Active CN111014553B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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CN111761008B (en) * 2020-07-01 2022-04-19 陕西宏远航空锻造有限责任公司 Method for forging titanium alloy parallelogram blank

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU902968A1 (en) * 1978-03-28 1982-02-07 Краматорский Научно-Исследовательский И Проектно-Технологический Институт Машиностроения Tool for forging blanks
RU2326749C1 (en) * 2006-11-29 2008-06-20 Государственное образовательное учреждение высшего профессионального образования "Уральский государственный технический университет - УПИ" Method of long-length blanks forging
CN201183104Y (en) * 2008-04-24 2009-01-21 内蒙古第一机械制造(集团)有限公司 Combined mould for forging member having processing blank cross section having bending deformation
CN101700557B (en) * 2009-11-05 2012-06-13 沈阳黎明航空发动机(集团)有限责任公司 Vertical forging and forming technology of installation edges
CN101947633A (en) * 2010-09-11 2011-01-19 无锡透平叶片有限公司 Die forging process and special die for final stage blade of large half-RPM (Revolution per Minute) nuclear turbine
CN201921965U (en) * 2010-12-30 2011-08-10 沈阳黎明航空发动机(集团)有限责任公司 Bisymmetry moulding bed forging die for short-span eccentric parts
CN204171256U (en) * 2014-10-10 2015-02-25 南车眉山车辆有限公司 The loose tooling forging frock of the outer window hinge of a kind of railway freight-car
CN204770414U (en) * 2015-07-07 2015-11-18 靖江正茂锚链附件有限公司 Mould structure of especially big set -square of mooring cable
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