CN101607263A - Three-roll cross rolling forming method and equipment for rotary cake parts - Google Patents

Abstract

The invention relates to a three-roller cross-rolling forming method for rotary cake parts, which includes placing a workpiece blank between a driving roller arranged in a triangle and two driven rollers, and the workpiece blank is rotated and extruded by the driving roller and linearly fed. Under the action of the two driven rollers and the driven rotation of the two driven rollers, the rolling motion and deformation around its own axis will be generated. After the accumulation of multi-rotation rolling deformation, the cross-sectional profile of the workpiece will be filled with the rolling pass, and the rolling forming will be completed. The equipment provided by the invention includes a machine body on which a driving roller arranged in a triangle and two driven rollers are arranged. The driving roller is connected to the motor through a transmission mechanism. One end of the slider is connected with the hydraulic transmission device, and the other end is connected with the transmission mechanism of the driving roller. The invention has the advantages of labor saving, energy saving, material saving, high efficiency and high quality. The deformation resistance required for rolling is small, the tonnage of equipment is small, the investment is small, no flash occurs, the amount of subsequent machining is small, and the utilization rate of materials is high.

Description

Three-roll cross rolling forming method and equipment for rotary cake parts

technical field

The invention relates to a three-roll cross-rolling forming method and equipment for rotary cake parts.

Background technique

Gears, flanges, high-pressure valve bodies, etc. are rotary cake parts widely used in machinery, automobiles, ships, and airplanes. The traditional manufacturing process of this type of parts is: forging billet-cutting. The typical shape of its forgings can be divided into two types: single-step rotary body and multi-step rotary body, as shown in Figure 1 (a1-a3, b1-b3, c1-c3, d1-d3). Single-step rotary forgings are usually formed by open die forging or closed die forging. Among them, open die forging has a large consumption of forging flash materials; closed die forging requires large deformation resistance, large tonnage of forging equipment, large investment, and high forging energy consumption. The multi-step rotary forging cannot be released by closed die forging, so it is usually formed by open die forging, or forging after simplifying the shape of the forging. These two forging forming methods have a large consumption of forging flash material. For larger rotary cake parts with a diameter of more than 800 mm, such as duplex gears, high-voltage electrical switch flanges, high-pressure valve connectors and other parts, even if the largest 10,000-ton die forging press in my country is used, it will still be difficult due to force. Insufficient to achieve die forging. At present, such parts can only be made by simple free forging, coupled with a large number of subsequent mechanical cutting processes, the high-quality steel that accounts for 40% to 60% of the weight of the part becomes metal chips, and consumes a lot of processing energy and energy. working hours.

Contents of the invention

The object of the present invention is to provide a labor-saving, energy-saving and material-saving three-roll cross rolling forming method and equipment for rotary cake parts.

In order to achieve the above object, technical scheme of the present invention is:

The three-roll cross-rolling forming method of rotary cake parts includes: placing the workpiece blank between the driving roller arranged in a triangle and two driven rollers, and the driving roller is driven by an electric motor to generate rotational motion; at the same time, the hydraulic transmission device drives The driving roller produces the linear feed motion of extruding the workpiece blank; the workpiece blank produces rolling motion and deformation around its own axis under the rotating extrusion of the driving roller and the driven rotation of the two driven rollers. Rolling deformation accumulates, the cross-sectional profile of the workpiece is filled with the rolling pass, and the rolling forming is completed.

The invention also provides a three-roller cross-rolling forming equipment for rotary cake parts, including a machine body, on which a driving roll and two driven rolls arranged in a triangle are arranged, and the driving roll is connected to the motor through a transmission mechanism. A chute and a slider that can slide along the chute are provided. One end of the slider is connected with the hydraulic transmission device, and the other end is connected with the transmission mechanism of the driving roller.

The above-mentioned slider is connected with the transmission mechanism of the driving roller through bearings.

The body of the present invention is provided with a link mechanism for adjusting the position of the axis of the driven roller. The link mechanism consists of a connecting rod hinged on the body at one end, a rotating shaft connected to the connecting rod at the other end, and a pull rod that makes the connecting rod rotate around the hinge point. Composition, the driven roller is connected with the rotating shaft of the connecting rod mechanism through the bearing.

The beneficial effects of the invention are: the three-roller cross-rolling forming method is a new plastic rotary forming technology, the workpiece is formed through continuous local plastic deformation during rotation, the metal fiber streamline is good, the deformation resistance required for local deformation is small, and the tonnage of the equipment is large. Small, less investment. When the profile of the workpiece is full of the pass, the rolling deformation ends, so no flash occurs, the amount of subsequent machining is small, and the material utilization rate is high. Using the three-roller cross rolling forming method, through reasonable design of the roll pass, the workpiece can obtain various shapes and contours, so as to realize the rolling forming of rotary cake parts, which has the advantages of labor saving, energy saving, material saving, high efficiency and high quality. .

Description of drawings

Figure 1 is a schematic diagram of a typical shape of a forging of a rotary cake part;

Fig. 2 is the schematic diagram of three-roll cross-rolling forming of rotary cake parts of the present invention;

Fig. 3 is the A-A view of Fig. 2;

Fig. 4 is a structural schematic diagram of the hydraulic pressure and the transmission device of the three-roll cross-rolling equipment of the present invention;

Fig. 5 is a schematic diagram of the driven roller linkage mechanism of the present invention;

Fig. 6 is a schematic diagram of the forming pass structure of several rotary cake parts in the present invention.

Detailed ways

As shown in Figure 2-4, the three-roll cross-rolling forming equipment for rotary cake parts of the present invention includes a body 1 on which a driving roll 2 arranged in a triangle and two driven rolls 4, 5 are arranged. The circumference side of the roller 2 is provided with a pass corresponding to the rotary cake forming workpiece. The driving roller 2 is connected to the motor 15 through the transmission mechanism (reduction box 14, universal joint 13, transmission shaft 11 and bearing 17). A chute 10 and a slider 12 that can slide along the chute 10 are provided. One end of the slider 12 is connected with the hydraulic transmission device 9 , and the other end is connected with the transmission shaft 11 of the driving roller 2 through a bearing 16 . The body 1 of the present invention is provided with two connecting rods 6, one end of each connecting rod 6 is hinged on the body 1, and the other end is connected with a pull rod 7 and a rotating shaft 8 that make the connecting rod 6 rotate around the hinge point, and the driven roller 4 , 5 are connected with rotating shaft 8 by bearing respectively.

In order to facilitate the processing of workpiece blanks with different outer diameters, a link mechanism is provided to adjust the axial center position of the driven roller. 8 and the pull rod 7 that makes the connecting rod 6 rotate around the hinge point constitute, and the driven roller 4 and/or 5 are connected with the rotating shaft 8 of the connecting rod mechanism through bearings. The present invention can be provided with a set of link mechanisms or two sets of link mechanisms as required; for one set of link mechanisms, it is used to connect and adjust one of the driven rollers 4 or 5; for two sets of link mechanisms, each set of link mechanisms The rod mechanism is used to connect and adjust the two driven rollers 4, 5 respectively.

The connecting rod mechanism of the driven roller is shown in Figure 5. Point A is the fixed end, and the center B of the driven roller is the movable end. Make a circular motion with a radius to adjust the position of the axis B.

In the three-roll cross-rolling forming method of the present invention, the pass is designed on the driving roll (the peripheral side of the driving roll), and a pair of driven rolls are rigid cylinders. According to the contour shape of the workpiece during rolling, a corresponding pass is designed. The driving roll and the corresponding size of the rectangular section (longitudinal section) workpiece blank (the cross section is circular), through the feeding and extrusion of the driving roll during rolling, the workpiece blank with a rectangular section profile is gradually filled with the pass of the driving roll, and finally formed for the workpiece.

The above-mentioned device can be used to realize the three-roll cross rolling forming of the rotary cake parts:

1) The drive roller 2 is driven by the motor 15 to generate rotational motion; at the same time, driven by the hydraulic transmission device 9 to generate a linear feed motion for extruding the workpiece blank.

2) The driven rollers 4 and 5 are idling rollers, which are driven to rotate under the friction of the workpiece blank 3; the position of their axis can be adjusted according to the outer diameter of the workpiece blank.

3) The workpiece blank 3 is supported and centered by the driving roller 2 and two driven rollers 4 and 5. Under the rotary extrusion of the driving roller 2, it produces rolling motion and deformation around its own axis. After multi-rotation rolling The deformation accumulates, the cross-sectional profile of the workpiece is filled with the rolling pass, and the rolling forming is completed.

Figure 6 shows the hole structure of three typical rotary cake parts. As shown in the figure, the three-roll cross rolling pass of the rotary cake parts is designed on the driving roll. According to the contour shape of the workpiece, design the driving roll with the corresponding pass shape, through the feed extrusion of the driving roll during rolling, the blank of the workpiece with a rectangular cross-sectional profile is gradually filled with the pass shape of the driving roll (see the drawing of rolling start and rolling end), Finally shaped into a workpiece.

Claims (4)

1. The three-roll cross-rolling forming method of rotary cake parts, including: placing the workpiece blank between the driving roller arranged in a triangle and two driven rollers, and the driving roller is driven by a motor to generate rotational motion; at the same time, the hydraulic pressure The transmission device drives the driving roller to produce a straight-line feed motion of extruding the workpiece blank; the workpiece blank produces rolling motion and deformation around its own axis under the action of the rotating extrusion of the driving roller and the driven rotation of the two driven rollers , through the accumulation of multi-turn rolling deformation, the cross-sectional profile of the workpiece is filled with the rolling pass, and the rolling forming is completed. 2. The three-roller cross-rolling forming equipment for rotary cake parts, including the body, is characterized in that: the body is equipped with a driving roller arranged in a triangle and two driven rollers, the driving roller is connected with the motor through a transmission mechanism, and the body There is a chute and a slider that can slide along the chute, one end of the slider is connected with the hydraulic transmission device, and the other end is connected with the transmission mechanism of the driving roller. 3. The three-roll cross-rolling forming equipment for rotary cake parts according to claim 2, characterized in that the slider is connected with the transmission mechanism of the driving roll through a bearing. 4. The three-roll cross rolling forming equipment for rotary cake parts according to claim 2 or 3, characterized in that: the machine body is provided with a connecting rod mechanism for adjusting the axial center position of the driven roller, and one end of the connecting rod mechanism is hinged on the The connecting rod on the body, the rotating shaft connected to the connecting rod at the other end, and the pull bar that makes the connecting rod rotate around the hinge point are composed of a driven roller connected with the rotating shaft of the connecting rod mechanism through a bearing.

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