Spinning machining device and process for automobile rim

Abstract

The invention relates to an automobile rim machining technology, in particular to an automobile rim spinning machining device and technology, the automobile rim spinning machining device comprises a base body, a sliding block, a push rod and a spinning wheel, the base body is at least provided with a first part, and the first part is gradually enlarged in the first direction of the base body; the sliding blocks are distributed in a circumferential array mode in the first direction with the first direction as the array center, the first surfaces of the sliding blocks surround to form a circle, the sliding blocks are connected with the first part in a sliding mode, and the sliding blocks slide in the first direction so that the radius of the circle formed by the first surfaces can be increased or decreased; the push rod is arranged at one end of the sliding block and used for pushing the sliding block to slide in the first direction. The spinning wheel is arranged on one side of the base body. According to the spinning machining device and process for the automobile rim, the stress of the formed rim can be more uniform.

Description

Technical Field

[0001] The invention relates to a process for processing an automobile rim, and in particular to a spinning processing device and process for processing an automobile rim. Background Art

[0002] With the increasing demand from OEMs for energy conservation and weight reduction, there is no room for further improvement in the structure and material of steel wheel spokes. Weight reduction in the steel wheel rim is a common industry trend. The shape design of steel wheel rims generally follows the wheel profile standard. Steel wheel rims generally consist of a bottom groove, rim, and bead. To ensure tire assembly, the bottom groove, rim, and bead seat are all confined to certain limits and manufactured using traditional roll-forming processes. However, the stresses on the steel wheel rim are uneven, with rim stiffness taking precedence, bottom groove elasticity being the primary concern, and the bead seat providing a balance of both.

[0003] Commonly used improvement methods are: (1) using high-grade steel plates to process rims; (2) using hot-formed steel plates to process rims. From the perspective of practical application, the above two improvement methods have their own disadvantages: (1) high-grade steel plates have poor processing properties and a high scrap rate, resulting in high overall costs. Currently, the tensile strength of conventional rim materials is concentrated between 500-600 MPa, with a scrap rate of about 0.3-0.5%. The tensile strength of high-grade steel plates is concentrated at 800 MPa and above, which causes many problems from butt welding to rolling, with more cracking and accompanied by thinning. The scrap rate is about 15-20%, which is 40-50 times that of conventional materials, and the cost increases significantly. (2) Processing rims with formed steel is costly, inefficient, and time-consuming. It requires high-temperature resistant molds and precise temperature control systems, which requires large equipment investment. At the same time, high-temperature heating consumes a lot of energy, and the process control is complex. The time taken to process a single rim is 3-5 times that of conventional materials, which is not conducive to large-scale production.

[0004] Based on this, it is necessary to improve the existing steel wheel preparation process. Summary of the Invention

[0005] In order to overcome the deficiencies in the prior art, the present invention provides an automobile rim spinning device and process.

[0006] One of the purposes of the present invention is to disclose a spinning device for an automobile rim, comprising: a base body, the base body being provided with at least a first portion, the first portion gradually becoming larger along a first direction of the base body; Sliders, the sliders being arranged in a circumferential array along the first direction with the first direction as the array center, the first surfaces of the sliders forming a circle around the first surface, the sliders being slidably connected to the first portion, and the sliders sliding along the first direction causing the radius of the circle formed by the first surface to increase or decrease; A push rod, which is provided at one end of the slider and is used to push the slider to slide along a first direction; A spinning wheel, which is arranged on one side of the base body.

[0007] Preferably, it further includes a spring. The spring and the push rod are respectively located at two ends of the slider in the first direction, and the spring is used to push the slider to slide towards the push rod side.

[0008] Preferably, it further includes a guide rod. The base body is provided with a guide hole, the guide rod is slidably connected to the guide hole, and one end of the guide rod passes through the guide hole and is connected to the slider.

[0009] Preferably, one end of the guide rod is provided with a bulged part, and the bulged part is used to limit the maximum distance of the guide rod sliding along one side.

[0010] Preferably, the base body includes a first split body and a second split body which are connected to each other. The first split body is connected to the spinning machine base body, the first part is connected to one end of the second split body, and the spring is arranged between the end face of the second split body and the end face of the slider.

[0011] Preferably, the surface of the first part is provided with a sliding groove, the sliding grooves correspond to the sliders one by one, the slider is provided with a connecting part matching the sliding groove, and the connecting part extends into the sliding groove and is slidably connected along the sliding groove.

[0012] The second object of the present invention is to disclose a spinning processing technology for automobile wheel rims, and the wheel rim blank expands radially while spinning. Specifically, it includes the following steps: (S1) Move the push rod along the first direction away from the slider, so that the circle formed by the first surfaces of each slider reaches the minimum state; (S2) Sleeve the workpiece to be processed on the first slider; (S3) Start the spinning machine and the push rod. While the spinning machine drives the workpiece to rotate at a high speed, the slider expands the workpiece radially.

[0013] The present invention has the following technical effects: In this device (or this process), the spinning process of the automobile wheel rim synchronously applies pressure in the axial and radial directions by rotating the wheel rim blank at a high speed, causing the metal material to undergo plastic flow and extend into a shape. Based on this: First, grain refinement. During the spinning process, severe plastic deformation causes the metal grains to break and rearrange, forming a dense fine-grained structure, significantly improving the yield strength and toughness of the material; Second, continuous fiber distribution, enabling the metal to form continuous fiber flow lines along the wheel rim contour, enhancing the fatigue resistance and impact resistance. Based on this, the formed wheel rim can be stressed more evenly. Description of the Drawings

[0014] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of the connection between the base body and the slider of the present invention; Figure 3 It is a schematic structural diagram of the first part in the present invention; Figure 4 is Figure 3 the top view in

[0015] In the figure, 100 is the base body; 101 is the first part; 101a is the chute; 102 is the guiding hole; 103 is the first split body; 104 is the second split body; 200 is the slider; 200a is the first surface; 300 is the push rod; 400 is the spinning wheel; 500 is the spring; 600 is the guide rod; 600a is the enlarged part; 700 is the workpiece. Specific embodiments The principles and features of the present invention will be described below in conjunction with embodiments; the examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0016] A spinning processing device for an automobile rim includes a base body 100, a slider 200, a push rod 300, a spinning wheel 400 and a spring 500. Among them, the base body 100 further includes a first part 101, a first split body 103 and a second split body 104.

[0017] The first split body 103 is arranged on one end face side of the second split body 104, and the first split body 103 and the second split body 104 are detachably connected by bolts. The first split body 103 is used to connect to the spinning machine base body, and the spinning machine base body drives the base body 100 to rotate self - sufficiently. The first part 101 is connected to the other end face side of the second split body 104. The first part 101 gradually becomes larger along the first direction of the base body 100. The above - mentioned first direction is the axial direction of the base body 100. One end of the first part 100 close to the second split body 104 is the large end, and one end of the first part 100 far from the second split body 104 is the small end. In this embodiment, the first part 100 is conical. A chute 101a is provided on the surface of the first part 101, and the chutes 101a are circumferentially arrayed with the first direction as the array center. The cross - section of the chute 101a is an inverted T - shape.

[0018] The slider 200 is slidably connected to the base body 100. Specifically, the sliders 200 correspond to the chutes 101a one by one. A connecting part matching the shape of the chute 101a is provided on one side of the slider 200, and the slider 200 can slide along the chute 101a. The surface of the positioning slider 200 that fits with the workpiece 700 is the first surface 200a, and all the sliders 200 enclose to form a circle on their surfaces. When the slider 200 slides along the first direction, the circle formed by the first surface 200a becomes larger or smaller.

[0019] The push rod 300 is arranged at one end of the slider 200 away from the second split body 104 and is used to push the slider 200 to slide along the first direction. The spring 500 and the push rod 300 are respectively arranged at both ends of the slider 200 in the first direction. When the external force applied by the push rod 300 to the slider 200 disappears, the spring 500 can push the slider 200 to slide towards the side close to the push rod 300.

[0020] The base body 100 and the slider 200 are connected through a guide rod 600. The base body 100 is provided with a guide hole 102, and the guide rod 600 is slidably connected with the guide hole 102. One end of the guide rod 600 passes through the guide hole 102 and is screwed with the slider 200. One end of the guide rod 600 is provided with a bulged part 600a, and the bulged part 600a is used to limit the maximum distance of the guide rod 600 sliding along one side, so as to prevent the slider 200 from being separated from the base body 100 under the action of the spring 500.

[0021] Based on the above device, the biggest difference between the process disclosed by the present invention and the existing process is that the rim is radially expanded while being spun. Specifically, it includes the following steps: (S1) Move the push rod 300 along the first direction towards the slider 200 to make the circle formed by the first surfaces 200a of each slider 200 reach the minimum state; (S2) Sleeve the workpiece 700 to be processed on the first slider 200; (S3) Start the spinning machine and the push rod 300. While the spinning machine drives the workpiece 700 to rotate at a high speed, the slider 200 radially expands the workpiece 700.

[0022] Apply pressure synchronously in the axial and radial directions to make the metal material of the rim undergo plastic flow and be formed by extension. For example, a steel plate with a thickness of 5 mm is spun, and the contour is elongated axially, and the full contour can reach 4.5 mm or 4 mm.

[0023] The above are only the preferred embodiments of the present invention; they are not intended to limit the present invention; any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A rotary forging device for an automobile rim, characterized in that, Comprising: A base body (100), the base body (100) is at least provided with a first part (101), and the first part (101) gradually becomes larger along the first direction of the base body (100); Sliders (200), the sliders (200) are circumferentially arrayed along the first direction with the first direction as the array center, the first surface (200a) of the sliders (200) forms a circle around, the sliders (200) are slidably connected to the first part (101), and the sliders (200) slide along the first direction so that the radius of the circle formed by the first surface (200a) becomes larger or smaller; Push rods (300), the push rods (300) are arranged at one end of the sliders (200) and are used to push the sliders (200) to slide along the first direction; Spinning wheels (400), the spinning wheels (400) are arranged on one side of the base body (100).

2. The spin forming device for automobile rim according to claim 1, wherein It further includes a spring (500), the spring (500) and the push rod (300) are respectively arranged at both ends of the slider (200) in the first direction, and the spring (500) is used to push the slider (200) to slide towards the side of the push rod (300).

3. The rotary swaging processing device for automobile rims according to claim 1, characterized in that, It further includes guide rods (600), the base body (100) is provided with guide holes (102), the guide rods (600) are slidably connected to the guide holes (102), and one end of the guide rods (600) passes through the guide holes (102) and is connected to the sliders (200).

4. The spinning processing device for an automobile rim according to claim 3, wherein, One end of the guide rod (600) is provided with a bulged part (600a), and the bulged part (600a) is used to limit the maximum distance of the guide rod (600) sliding along one side.

5. The spin forming device for automobile rim according to claim 2, wherein, The base body (100) includes a first split body (103) and a second split body (104) which are connected to each other, the first split body (103) is connected to the spinning machine base body, the first part (101) is connected to one end of the second split body (104), and the spring (500) is arranged between the end face of the second split body (104) and the end face of the slider (200).

6. The rotary swaging processing device for an automotive rim according to claim 1, characterized in that, The surface of the first part (101) is provided with sliding grooves (101a), the sliding grooves (101a) correspond to the sliders (200) one by one, the sliders (200) are provided with connecting parts matching the sliding grooves (101a), and the connecting parts extend into the sliding grooves (101a) and are slidably connected along the sliding grooves (101a).

7. A spinning process for an automotive rim, characterized in that, The rim blank expands radially while being spun.

8. The spinning process for automobile rims according to claim 7, characterized in that, Including the following steps: (S1) Move the push rod (300) along the first direction away from the slider (200) so that the circle formed by the first surfaces (200a) of the sliders (200) reaches the minimum state; (S2) Set the workpiece to be processed (700) on the first slider (200); (S3) Start the spinning machine and the push rod (300), while the spinning machine drives the workpiece (700) to rotate at a high speed, the slider (200) expands the workpiece (700) radially.

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