阅读说明：本技术 一种槽辐一体轮辋的加工成型工艺 (Machining and forming process of groove-spoke integrated rim ) 是由 肖海 于 2021-06-25 设计创作，主要内容包括：本发明公开了一种槽辐一体轮辋的加工成型工艺,依次包括有以下步骤：步骤一、将金属材料切割加工成圆片；步骤二、在圆片的中部冲孔,形成中心样孔；步骤三、将圆片的四周冲压折弯,形成折弯部；步骤四、利用旋压机在一定温度下热旋加工折弯部,多次热旋加工后折弯部形成轮辋圆周面；步骤五、车加工中心样孔及折弯部,中心样孔车加工后形成中心孔；步骤六、在圆片上钻螺孔、风孔。本发明的槽辐一体轮辋的加工成型工艺,采用多次热旋加工方式逐渐形成,解决了依次冷冲压成型过程中大折弯处容易出现裂纹的问题,减少了轮辋内部应力集中的问题,提高了轮辋的结构强度。(The invention discloses a processing and forming process of a groove-spoke integrated rim, which sequentially comprises the following steps: firstly, cutting and processing a metal material into a wafer; punching a hole in the middle of the wafer to form a central sample hole; thirdly, stamping and bending the periphery of the wafer to form a bent part; step four, utilizing a spinning machine to carry out hot spinning processing on the bent part at a certain temperature, and forming a circular rim circumference surface on the bent part after multiple hot spinning processing; fifthly, turning a central sample hole and a bending part, and forming a central hole after turning the central sample hole; and step six, drilling screw holes and air holes on the wafer. The processing and forming process of the groove-spoke integrated rim adopts a repeated hot spinning processing mode to form gradually, solves the problem that cracks are easy to appear at a large bending part in the sequential cold stamping forming process, reduces the problem of stress concentration inside the rim, and improves the structural strength of the rim.)

1. The machining and forming process of the groove-spoke integrated rim is characterized by comprising the following steps of:

firstly, cutting and processing a metal material into a wafer;

punching a hole in the middle of the wafer to form a central sample hole;

thirdly, stamping and bending the periphery of the wafer to form a bent part;

step four, utilizing a spinning machine to carry out hot spinning processing on the bent part at a certain temperature, and forming a circular rim circumference surface on the bent part after multiple hot spinning processing;

fifthly, turning a central sample hole and a bending part, and forming a central hole after turning the central sample hole;

and step six, drilling screw holes and air holes on the wafer.

2. The process for manufacturing a channel-spoke integrated rim as claimed in claim 1, wherein the metal material is carbon structural steel or low alloy steel.

3. The process for manufacturing a channel-spoke integrated rim as claimed in claim 1, wherein an included angle of 25-35 degrees is formed between the bending part and the disc.

4. The processing and forming process of the channel and spoke integrated rim as claimed in claim 1, wherein the number of times of the hot spinning is 3, the 3 times of hot spinning are sequentially set as one hot spinning, two times of hot spinning and three times of hot spinning, an included angle between the bent portion and the circular sheet in the process after the one hot spinning is gradually changed from a 25-35 degree included angle to a 45-55 degree included angle, an included angle between the bent portion and the circular sheet in the process of the second hot spinning is gradually changed from a 45-55 degree included angle to a 70-80 degree included angle, and an included angle between the bent portion and the circular sheet in the process of the three times of hot spinning is gradually changed from a 70-80 degree included angle to a 90 degree included angle.

5. The process for manufacturing and molding a channel and spoke integrated rim as claimed in claim 4, wherein the interval between 3 times of the hot spinning is 5-10 minutes, the duration time of each hot spinning is 20-30 minutes, and the temperature is kept at 400-500 ℃ during the hot spinning.

Technical Field

The invention belongs to the technical field of rim production, and particularly relates to a processing and forming process of a groove-spoke integrated rim.

Background

The rim (wheel rim) is commonly called a rim, and is a component for installing and supporting a tire on the periphery of a wheel, and the rim and a spoke form the wheel. The rim and spokes may be integral, permanently attached, or detachable. The common forms of rims are mainly two: drop center rims and flat bottom rims; in addition, split rims, half-deep grooved wheel rims, deep groove wide rims, flat bottom wide rims, full slant bottom rims and the like are also provided. The groove-spoke integrated rim is a rim with a part forming the circumferential surface of the rim and a spoke part which are of an integrated structure, is different from a common rim with a spoke welded on the rim or bolted on the rim, and has the advantages of higher structural strength, lower processing cost, shorter production period and the like. The existing processing of the groove-spoke integrated rim adopts a cold pressing one-step forming mode of a punching device, and because the included angle between the circumferential surface of the rim and the spoke is large (85-90 degrees), the one-step punch forming easily generates universal stress concentration and even cracks, and the secondary damage is easily generated in the post-processing and punching processes. A large number of defective products exist in the process of quality detection in the later stage of rims produced in large scale, and some rims can reach the use standard only through strict annealing treatment.

Disclosure of Invention

In order to solve the technical problems, the invention adopts the technical scheme that: a processing and forming process of a groove-spoke integrated rim comprises the following steps:

firstly, cutting and processing a metal material into a wafer;

punching a hole in the middle of the wafer to form a central sample hole;

thirdly, stamping and bending the periphery of the wafer to form a bent part;

step four, utilizing a spinning machine to carry out hot spinning processing on the bent part at a certain temperature, and forming a circular rim circumference surface on the bent part after multiple hot spinning processing;

fifthly, turning a central sample hole and a bending part, and forming a central hole after turning the central sample hole;

and step six, drilling screw holes and air holes on the wafer.

Preferably, in the above technical solution, the metal material is carbon structural steel or low alloy steel.

Preferably, in the above technical solution, an included angle of 25 to 35 degrees is formed between the bending portion and the circular sheet.

Preferably, the hot-spinning processing is performed 3 times, the 3 times of hot-spinning processing are sequentially set to be primary hot-spinning processing, secondary hot-spinning processing and tertiary hot-spinning processing, an included angle between the bent part and the wafer in the process after the primary hot-spinning processing is gradually changed from an included angle of 25-35 degrees to an included angle of 45-55 degrees, an included angle between the bent part and the wafer in the secondary hot-spinning processing is gradually changed from an included angle of 45-55 degrees to an included angle of 70-80 degrees, and an included angle between the bent part and the wafer in the tertiary hot-spinning processing is gradually changed from an included angle of 70-80 degrees to an included angle of 90 degrees.

Preferably, the interval between 3 times of the hot spinning is 5-10 minutes, the duration time of each hot spinning is 20-30 minutes, and the constant temperature is 400-500 ℃ in the hot spinning process.

The invention has the beneficial effects that: the processing and forming process of the groove-spoke integrated rim adopts a repeated hot spinning processing mode to form gradually, solves the problem that cracks are easy to appear at a large bending part in the sequential cold stamping forming process, reduces the problem of stress concentration inside the rim, and improves the structural strength of the rim.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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 description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, the machining and forming process of the groove-spoke integrated rim comprises the following steps:

step one, selecting carbon structural steel as a rim material, and cutting the carbon structural steel into a wafer 1.

And step two, punching the middle part of the wafer 1 by using punching equipment to form a central sample hole 2. The periphery of the central sample hole 2 can be simultaneously punched with a plurality of clamping grooves for later use.

And thirdly, stamping and bending the periphery of the wafer by using stamping equipment to form a bent part 3. An included angle of 30 degrees is formed between the bending part and the wafer.

And step four, carrying out hot spinning on the bent part 3 at a certain temperature by using a spinning machine, wherein the hot spinning frequency is 3 times, and the temperature is kept at 450 ℃ in the hot spinning process. The 3 times of hot spinning are sequentially set as primary hot spinning, secondary hot spinning and tertiary hot spinning, the included angle between the bending part 3 and the wafer 1 in the process after the primary hot spinning is gradually changed from the 30-degree included angle to the 50-degree included angle within 30 minutes, and after the constant temperature is kept for 5 minutes, the secondary hot spinning is started. The secondary hot-spinning process lasts for 30 minutes, and the included angle between the bending part 3 and the wafer 1 in the secondary hot-spinning process is gradually changed from a 50-degree included angle to a 75-degree included angle. After 5 minutes of constant temperature, three times of hot spinning were started. The three hot spinning processes were continued for 30 minutes. The included angle between the bending part 3 and the wafer 1 in the third hot spinning process is gradually changed from a 75-degree included angle to a 90-degree included angle. The bending part 3 forms the circumferential surface of the rim after 3 times of hot spinning.

Step five, turning a central sample hole 2 and a bending part 3, and forming a central hole 4 after turning the central sample hole;

and step six, drilling screw holes 5 and air holes 6 on the circular sheet to finally obtain the groove-spoke integrated rim.

It should be noted that the technical features of the spinning machine, the punching device, and the like, which are referred to in the present patent application, should be regarded as the prior art, and the specific structure, the operation principle, the control manner and the spatial arrangement manner that may be referred to in the present patent application are conventional in the art, and should not be regarded as the invention point of the present patent application, and the present patent application is not further specifically described in detail.

Having described preferred embodiments of the present invention in detail, it is to be understood that modifications and variations may be resorted to without departing from the spirit and scope of the invention as defined by the appended claims.