阅读说明：本技术 一种椭圆环的制造方法 (Manufacturing method of elliptical ring ) 是由 马志强 邓曙光 王全先 曹学灵 王一军 于 2019-12-04 设计创作，主要内容包括：本发明公开了一种椭圆环的制造方法,包括提供胚料,将胚料锻造形成圆环；对圆环进行加热；提供椭圆形模具,将其压入圆环中,以将圆环扩张为椭圆环；对椭圆环进行正火处理；将椭圆形模具从椭圆环中分离出来,得到椭圆环。本发明实施例提供的一种椭圆环的制造方法,采用椭圆形模具将圆环直接扩张为椭圆环,能够简化椭圆环的制造工艺,缩短其制造时间,从而有利于提高椭圆环的制造效率。此外,本发明实施例采用的椭圆形模具为单体模具,使得在放置模具时比较便捷,这有利于提高椭圆环的加工速率。(The invention discloses a manufacturing method of an elliptical ring, which comprises the steps of providing a blank, forging the blank to form a circular ring; heating the circular ring; providing an elliptical die, pressing the elliptical die into the circular ring to expand the circular ring into an elliptical ring; normalizing the elliptical ring; and separating the elliptical die from the elliptical ring to obtain the elliptical ring. According to the manufacturing method of the elliptical ring, the elliptical die is adopted to directly expand the circular ring into the elliptical ring, so that the manufacturing process of the elliptical ring can be simplified, the manufacturing time of the elliptical ring can be shortened, and the manufacturing efficiency of the elliptical ring can be improved. In addition, the elliptical die adopted by the embodiment of the invention is a single die, so that the die is convenient to place, and the processing speed of the elliptical ring is favorably improved.)

1. A method of manufacturing an elliptical ring, comprising:

providing a blank, and forging the blank to form a circular ring;

normalizing the circular ring;

providing an elliptical die which is pressed into the circular ring to expand the circular ring into an elliptical ring;

and separating the elliptical die from the elliptical ring to obtain the elliptical ring.

2. The manufacturing method according to claim 1, wherein the step of providing the blank and forging the blank into the ring specifically comprises:

providing a cylindrical and solid preform;

heating the preform;

and punching the center of the prefabricated blank by adopting a punch to obtain the circular ring.

3. The manufacturing method according to claim 2, wherein the height of the circular ring is 10mm to 15mm higher than the height of the elliptical ring after the expansion, and the thickness of the circular ring is equal to the thickness of the elliptical ring.

4. The manufacturing method according to any one of claims 1 to 3, characterized in that after the step of normalizing the circular ring and before the step of providing an elliptical mold and pressing it into the circular ring to expand the circular ring into an elliptical ring, the manufacturing method further comprises:

hoisting the circular ring to the oval forging by adopting first hoisting equipment;

the temperature of the oval forging is lower than the temperature of the oval die after the temperature is raised, and the area of the oval forging is larger than or equal to the area of the oval ring outer ring.

5. The manufacturing method according to any one of claims 1 to 3, wherein the elliptical die is a solid elliptical cylinder, and the height of the elliptical die is greater than or equal to the height of the circular ring, and the outer ring size of the elliptical die is 0.6% to 1.5% greater than the size of the elliptical hole of the elliptical ring.

6. The manufacturing method of claim 5, wherein an extension part extends downwards from one end of the oval mold, the side surface of the extension part is a wedge-shaped surface, and the inclination of the wedge-shaped surface is 10.8-14.3 degrees.

7. The manufacturing method according to claim 6, wherein in the step of providing an elliptical mold and pressing it into the circular ring to expand the circular ring into an elliptical ring, the method specifically comprises:

hoisting the elliptical die on second hoisting equipment;

aligning the extension with the ring and into the ring with the second lifting device;

and pressing the elliptical die into the circular ring by using a press until the upper surface of the elliptical die is flush with the upper end surface of the circular ring.

8. The manufacturing method according to claim 7, wherein in the step of separating the elliptical die from the elliptical ring, the method specifically comprises:

clamping the extension part of the elliptical die by using clamping equipment;

rotating and pressing the elliptical ring along the outer surface of the elliptical ring by using the press until a gap is formed between the outer surface of the elliptical die and the inner annular surface of the elliptical ring;

separating the elliptical die from the elliptical ring with the gap.

9. The production method according to any one of claims 1 to 3, wherein the normalizing temperature is 900 ℃ to 930 ℃.

10. The manufacturing method according to any one of claims 1 to 3, characterized in that after the step of separating the elliptical die from the elliptical ring, the manufacturing method further comprises:

and tempering the elliptical ring.

Technical Field

The invention relates to the technical field of forging processing, in particular to a manufacturing method of an elliptical ring.

Background

At present, the manufacturing method of the elliptical ring generally adopts a plate bending machine to bend two plates into two semi-circles respectively, and then adopts a welding mode to weld the two semi-circles together so as to form a complete elliptical ring. However, in the above-described method, there is a high possibility that a welding mark is left after machining a welded portion, and the performance of the welded portion is degraded, which causes a degradation in the performance of the elliptical ring, and further causes a degradation in the quality of the elliptical ring, which affects the use of the elliptical ring. In addition, the mode has higher requirements on processing equipment, and is not beneficial to controlling the manufacturing cost of the elliptical ring.

Disclosure of Invention

The embodiment of the invention discloses a manufacturing method of an elliptical ring, which not only can improve the quality of the elliptical ring, but also can reduce the manufacturing cost of the elliptical ring.

In order to achieve the above object, an embodiment of the present invention provides a method for manufacturing an elliptical ring, including:

providing a blank, and forging the blank to form a circular ring;

normalizing the circular ring;

providing an elliptical die which is pressed into the circular ring to expand the circular ring into an elliptical ring;

and separating the elliptical die from the elliptical ring to obtain the elliptical ring.

As an alternative embodiment, in the embodiment of the present invention, in the step of providing the blank and forging the blank to form the circular ring, the method specifically includes:

providing a cylindrical and solid preform;

heating the preform;

and punching the center of the prefabricated blank by adopting a punch to obtain the circular ring.

As an alternative implementation manner, in the embodiment of the present invention, the height of the circular ring is 10mm to 15mm higher than the height of the expanded elliptical ring, and the thickness of the circular ring is equal to the thickness of the elliptical ring.

As an alternative implementation, in an embodiment of the present invention, after the step of normalizing the circular ring and before the step of providing an elliptical mold and pressing it into the circular ring to expand the circular ring into an elliptical ring, the manufacturing method further includes:

hoisting the circular ring to the oval forging by adopting first hoisting equipment;

the temperature of the oval forging is lower than the temperature of the oval die after the temperature is raised, and the area of the oval forging is larger than or equal to the area of the oval ring outer ring.

As an alternative implementation manner, in the embodiment of the present invention, the oval mold is a solid oval column, the height of the oval mold is greater than or equal to the height of the circular ring, and the outer ring size of the oval mold is 0.6% to 1.5% greater than the size of the oval hole of the oval ring.

As an alternative implementation manner, in an embodiment of the present invention, an extension portion extends downward from one end of the elliptical mold, a side surface of the extension portion is a wedge-shaped surface, and a slope of the wedge-shaped surface is 10.8 ° to 14.3 °.

As an alternative implementation manner, in an embodiment of the present invention, in the step of providing an elliptical mold and pressing the elliptical mold into the circular ring to expand the circular ring into an elliptical ring, the method specifically includes:

hoisting the elliptical die on second hoisting equipment;

aligning the extension with the ring and into the ring with the second lifting device;

and pressing the elliptical die into the circular ring by using a press until the upper surface of the elliptical die is flush with the upper end surface of the circular ring.

As an optional implementation manner, in an embodiment of the present invention, in the step of separating the elliptical die from the elliptical ring, the step specifically includes:

clamping the extension part of the elliptical die by using clamping equipment;

rotating and pressing the elliptical ring along the outer surface of the elliptical ring by using the press until a gap is formed between the outer surface of the elliptical die and the inner annular surface of the elliptical ring;

separating the elliptical die from the elliptical ring with the gap.

As an alternative implementation, in the embodiment of the present invention, the normalizing temperature is 900 ℃ to 930 ℃.

As an alternative implementation, in an embodiment of the present invention, after the step of separating the elliptical die from the elliptical ring, the manufacturing method further includes:

and tempering the elliptical ring.

Compared with the prior art, the invention has the beneficial effects that:

according to the manufacturing method of the elliptical ring, the elliptical die is adopted to directly expand the circular ring into the elliptical ring, so that the manufacturing process of the elliptical ring can be simplified, the manufacturing time of the elliptical ring can be shortened, and the manufacturing efficiency of the elliptical ring can be improved. In addition, the manufacturing method provided by the invention does not need a step of welding by a large submerged arc welding machine, and has low requirement on processing equipment, thereby being beneficial to reducing the manufacturing cost of the elliptical ring.

In addition, the elliptical die adopted by the embodiment of the invention is a single die, so that the die is convenient to place, and the processing speed of the elliptical ring is improved; and the mould is provided with the extension part with the inclination, and the extension part has a certain guiding effect on the reaming, so that the deviation of the obtained elliptical ring is small, and the forming quality of the elliptical ring is good.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a flow chart of a method for manufacturing an elliptical ring according to an embodiment of the present invention;

FIG. 2 is a flowchart of the detailed steps of step 101 provided by the embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an elliptical mold and a ring according to an embodiment of the present invention;

FIG. 4 is a schematic view of the elliptical die and ring of FIG. 3 from another perspective;

FIG. 5 is a flowchart of the detailed steps of step 103 provided by the embodiment of the present invention;

fig. 6 is a flowchart of the specific steps of step 104 according to an embodiment of the present invention.

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.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "center", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the present invention can be understood by those skilled in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.

The embodiment of the invention discloses a manufacturing method of an elliptical ring, wherein an elliptical die is adopted to directly expand a circular ring into the elliptical ring, so that the manufacturing process of the elliptical ring can be simplified, the manufacturing time of the elliptical ring can be shortened, and the manufacturing efficiency of the elliptical ring can be improved.

The technical solution of the present invention will be further described with reference to the following embodiments and the accompanying drawings.

Referring to fig. 1 to 4, an embodiment of the invention provides a method for manufacturing an elliptical ring 1, the method comprising:

101. providing a blank, and forging the blank to form the circular ring 1.

In an embodiment, the material of the blank may be a metal material such as steel, aluminum, and the like. As shown in fig. 2, the step 101 specifically includes the following steps:

1011. a cylindrical and solid preform is provided.

1012. And heating the prefabricated blank.

1013. And punching the center of the prefabricated blank by using a punch to obtain the circular ring 1.

102. The ring 1 is subjected to normalizing treatment.

In this example, the ring 1 may be placed in a heating furnace, which may be a natural gas heating furnace, to be subjected to normalizing treatment.

The main purpose in this step is to eliminate the forging stress of the ring 1 and to refine the grains to ensure that the mechanical properties of the ring 1 are satisfactory. Specifically, in actual practice, the normalizing temperature may be generally 900 ℃ to 930 ℃, and may be 900 ℃, 910 ℃, 920 ℃, 930 ℃ or the like, for example.

103. An elliptical die 2 is provided and pressed into the ring 1 to expand the ring 1 into an elliptical ring.

In this embodiment, adopt and use oval mould 2 to expand into the mode of elliptical ring with it after ring 1 normalizing treatment, because the temperature of ring 1 after normalizing treatment can not be too high, consequently when expanding ring 1 into elliptical ring, not only can be so that the deflection of the height of the elliptical ring after the expansion is less for the size of elliptical ring is close original design size more, reduces machining error, also can not weigh the terminal surface of ring 1 simultaneously.

In addition, it can be known that the prior art manufacturing process of the elliptical ring generally needs to perform normalizing treatment on the elliptical ring after the elliptical ring is formed by heating and forging, but the manufacturing method of the invention directly utilizes the normalizing temperature of the normalizing treatment circular ring to press the elliptical die into the circular ring to expand the elliptical die into the elliptical ring.

Further, although the deformation amount of the expanded elliptical ring can be reduced by expanding the ring 1 into the elliptical ring after the normalizing treatment, the size of the expanded elliptical ring is reduced after cooling based on the principle of thermal expansion and cold contraction of an object, so that the size of the outer ring of the elliptical die 2 can be preferably 0.6-1.5% larger than the size of the elliptical hole of the elliptical ring, and thus, the expanded elliptical ring can be favorably ensured to meet the processing size and performance requirements.

Similarly, when the elliptical die 2 is pressed into the annular ring 1, the height of the annular ring 1 is reduced, so that the height of the expanded elliptical ring is insufficient, and therefore, the height h of the annular ring 1 may be set to be 10mm to 15mm, for example, 10mm, 11mm, 12mm, 13mm, 14mm, or 15mm, higher than the height of the expanded elliptical ring 1, so that the height of the expanded elliptical ring can meet the requirements of processing size and performance.

Further, since the amount of deformation of the thickness of the ring 1 is relatively small when the ring 1 is pressed into the ring 1 using the elliptical die 2 after the ring 1 is normalized at the normalizing temperature of 900 to 930 ℃, the thickness of the ring 1 may preferably be equal to the thickness of the elliptical ring.

It is understood that the blank cannot be deformed in the heating furnace, and therefore, the present invention also requires that the ring 1 after the normalizing treatment be hung outside the heating furnace. That is, after step 102, and before step 103, the ring 1 may be hoisted onto the forging outside the heating furnace using the first hoisting device.

Specifically, the forging may preferably be an elliptical forging, and the area thereof may preferably be greater than or equal to the area of the outer ring of the elliptical ring 1, so that the contact area between the elliptical ring and the elliptical forging may be increased to prevent the end face of the circular ring 1 from being crushed when the elliptical die 2 is pressed into the circular ring 1.

It can be known that the high-temperature elliptical forging is easy to deform under the extrusion of external force, and when the elliptical forging deforms, when the step of pressing the elliptical die 2 into the circular ring 1 is performed, the circular ring 1 placed on the elliptical die may move, so that when the elliptical die 2 is pressed into the circular ring 1, the circular ring 1 may deform, and the expanded elliptical ring cannot meet the processing requirements, therefore, the elliptical forging adopted in the invention may preferably be the elliptical forging with the temperature lower than the temperature of the elliptical die 2 after being heated, for example: normal temperature oval forging.

The temperature of the elliptical die 2 after being heated is the temperature of the elliptical die 2 after being heated in the process of pressing the elliptical die 2 into the ring 1.

In the present embodiment, the elliptical die 2 may preferably be a solid elliptical cylinder, so that when it is pressed into the circular ring 1, the elliptical die 2 can be ensured to have sufficient strength, and the elliptical die can be also conveniently pressed into the circular ring 1.

Further, as shown in fig. 3 and 4, in order to press the elliptical die 2 into the ring 1, an extension portion 20 extends downward from one end of the elliptical die 2, and the extension portion 20 is integrally formed with the elliptical die 2. Specifically, the side of the extension 20 is a wedge-shaped surface 201, wherein the slope θ of the wedge-shaped surface 201 is 10.8 ° to 14.3 °, for example, the slope θ may be 10.8 °, 11.8 °, 12.8 °, 13.8 °, 14.3 °, or the like. One end downwardly extending at oval mould 2 has extension 20, and the both sides side of this extension 20 is the wedge, can not only conveniently impress oval mould 2 in the ring 1, also can play the guide effect simultaneously, be unlikely to lead to its one side to ring 1 when impressing oval mould 2 in the ring 1 to the deviation of the elliptical ring after can making the expansion is less, makes elliptical ring 1's shaping of high quality.

It can be known that, in this patent, forge elliptical ring and only need an elliptical die 2, consequently when hoisting this elliptical die 2, only need hoist and mount once alright, this is favorable to simplifying the manufacturing procedure of elliptical ring, shortens the process time of elliptical ring to improve the manufacturing efficiency of elliptical ring.

In this embodiment, as shown in fig. 5, the step 103 specifically includes the following steps:

1031. and hoisting the elliptical die 2 on second hoisting equipment.

In this embodiment, a lifting hole 21 is provided at an end of the elliptical die 2 away from the extension portion 20, and the lifting hole 21 is used for being connected with a second lifting device, so as to achieve the purpose of lifting the elliptical die 2 on the second lifting device.

Preferably, the hanging holes 21 can be two to improve the stability of the elliptical mold 2 hanging on the second hanging device. Wherein, two hanging holes 21 are symmetrically arranged on two sides of the oval mould 2, as shown in fig. 3.

1032. The extension 20 is aligned with the ring 1 using a second lifting device and the extension 20 is brought into the ring 1.

1033. The elliptical die 2 is pressed into the circular ring 1 by a press until the upper surface 22 of the elliptical die 2 is flush with the upper end surface 11 of the circular ring 1.

The upper surface 22 of the oval mold 2 is an end surface of the oval mold 2 away from the extension portion 20. Preferably, the height H of the elliptical die 2 can be set to be greater than or equal to the height H of the circular ring 1, so that the sizes of elliptical holes of any height of the elliptical ring can be kept consistent, the molding quality of the expanded elliptical ring can be improved, and the shape of the elliptical ring can be ensured.

In this embodiment, since the height H of the elliptical die 2 is preferably greater than or equal to the height H of the circular ring 1, when the elliptical die 2 is pressed into the circular ring 1, the extending portion 20 of the elliptical die 2 will penetrate through the circular ring 1 and be exposed outside the lower port of the circular ring 1, and the step of pressing the elliptical die 2 into the circular ring 1 is performed when the circular ring 1 is placed on an elliptical forging, so that, when the elliptical die 2 is pressed into the circular ring 1, the forging will not block the extending portion 20 of the elliptical die 2, the elliptical forging is provided with an accommodating space corresponding to the extending portion 20 for accommodating the extending portion 20, thereby avoiding damaging the elliptical die 2, enabling the elliptical die 2 to be reused, and prolonging the service life of the elliptical die.

104. The elliptical mold 2 is separated from the elliptical ring to obtain an elliptical ring.

As shown in fig. 6, the step 104 specifically includes the following steps:

1041. the extension 20 of the oval mould 2 is clamped with a clamping device.

1042. And (3) rotating and pressing the elliptical ring along the outer surface of the elliptical ring by using a press until a gap is formed between the outer surface of the elliptical die 2 and the inner annular surface of the elliptical ring.

1043. The elliptical die 2 is separated from the elliptical ring by a gap.

105. And tempering the elliptical ring.

The main purpose in this step is to eliminate the stress of the elliptical ring and to improve the ductility and toughness of the elliptical ring, thereby improving the impact properties of the elliptical ring.

According to the manufacturing method of the elliptical ring, the elliptical die is adopted to directly expand the circular ring into the elliptical ring, so that the manufacturing process of the elliptical ring can be simplified, the manufacturing time of the elliptical ring can be shortened, and the manufacturing efficiency of the elliptical ring can be improved. In addition, the manufacturing method provided by the invention does not need a step of welding by a large submerged arc welding machine, and has low requirement on processing equipment, thereby being beneficial to reducing the manufacturing cost of the elliptical ring.

In addition, the elliptical die adopted by the embodiment of the invention is a single die, so that the die is convenient to place, and the processing speed of the elliptical ring is improved; and the mould is provided with the extension part with the inclination, and the extension part has a certain guiding effect on the reaming, so that the deviation of the obtained elliptical ring is small, and the forming quality of the elliptical ring is good.

The above detailed description is provided for the manufacturing method of the elliptical ring disclosed in the embodiment of the present invention, and the principle and the embodiment of the present invention are explained by applying specific examples, and the above description of the embodiment is only used to help understanding the manufacturing method of the elliptical ring and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.