Radial forging method for forming short lead screw of inverted planetary roller screw pair

A technology of radial forging and planetary rollers, which is applied in the direction of manufacturing tools, forging/pressing/hammer devices, forging/pressing/hammering machinery, etc., and can solve the problems of inability to form gear shapes, difficult material flow, and high tooth height of gears, etc. problem, to achieve the effect of less manufacturing time, high mechanical strength and high hardness

Active Publication Date: 2014-08-27
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Only satisfying the above formula may cause chaotic teeth, and it is impossible to form a qualified gear shape
In addition, the gear teeth are tall, the material flow is difficult, and it is difficult to forge one by one

Method used

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  • Radial forging method for forming short lead screw of inverted planetary roller screw pair
  • Radial forging method for forming short lead screw of inverted planetary roller screw pair
  • Radial forging method for forming short lead screw of inverted planetary roller screw pair

Examples

Experimental program
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Effect test

Embodiment 1

[0039] In this embodiment, four radial forging dies 1 are adopted, and the radial forging dies 1 are arrayed at equal intervals along the axis of the workpiece 2 in space. The formed reverse planetary roller screw pair short lead screw has 6 threads, 78 gear teeth, 1 mm total radial forging, and 2 passes.

[0040] A method for radially forging a reverse-type planetary roller screw auxiliary short lead screw, comprising the following steps:

[0041] Step 1, clamping workpiece 2, one end of workpiece 2 is clamped by manipulator 3;

[0042] Step 2, workpiece 2 is fed axially, refer to figure 1 , the manipulator 3 holds the workpiece 2 and feeds it in the direction of the radial forging die 1, and enters the strike range of the radial forging die 1, refer to figure 2 , the radial forging die 1 has a thread segment a and a gear segment b, and the formed thread segment and the forming gear segment on the workpiece 2 are respectively aligned with the thread segment a and the gear ...

Embodiment 2

[0061] In this embodiment, four radial forging dies 1 are adopted, and the radial forging dies 1 are arrayed at equal intervals along the axis of the workpiece 2 in space. The formed reverse planetary roller screw pair short lead screw has 6 threads, 78 gear teeth, 0.75mm radial forging, and 1 pass.

[0062] A method for radially forging a reverse-type planetary roller screw auxiliary short lead screw, comprising the following steps:

[0063] Step 1, clamping workpiece 2, one end of workpiece 2 is clamped by manipulator 3;

[0064] Step 2, workpiece 2 is fed axially, refer to figure 1 , the manipulator 3 holds the workpiece 2 and feeds it in the direction of the radial forging die 1, and enters the strike range of the radial forging die 1, refer to figure 2 , the radial forging die 1 has a thread segment a and a gear segment b, and the formed thread segment and gear segment on the workpiece 2 are respectively aligned with the thread segment a and the gear segment b on the r...

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Abstract

The invention provides a radial forging method for forming a short lead screw of an inverted planetary roller screw pair. The radial forging method for forming the short lead screw of the inverted planetary roller screw pair includes the steps that a radial forging die is provided with a thread form segment and a gear form segment simultaneously; a workpiece is rotated, the radial forging die conducts blow forging and then is lifted up, and the mentioned steps are continuously repeated until radial forging forming of the short lead screw with the specified radial forging amount is completed; forming and manufacturing of the short lead screw is completed through one pass or multiple passes; plastic forming of threads and gears of the short lead screw are completed simultaneously, a thread segment and a spline segment of the formed and manufactured short lead screw are integrated. The forming and manufacturing time is short, the part reliability is high, and the mechanical strength is high; through the method, large-diameter thread and gear coaxial parts with similar features can also be formed; the method is combined with a medium-high-frequency induction heating method, the parts made of materials with large deformation resistance, high hardness and hard deformation can be formed.

Description

technical field [0001] The invention belongs to the technical field of advanced material forming, and in particular relates to a method for radially forging and forming a short lead screw of a reverse planetary roller screw screw pair. Background technique [0002] The planetary roller screw is similar to the ball screw, and it is also a transmission device that can convert rotary motion and linear motion into each other. Compared with the ball screw, the planetary roller screw has the advantages of high load capacity, long life, high acceleration and speed, and smaller lead, so it is suitable for occasions with high speed, heavy load, and high precision requirements. Instruments, robots, and high-precision CNC machine tools have a wide range of applications. [0003] There are two types of general planetary roller screw pairs: standard type and reverse type. Standard planetary roller screw pair: long screw, short nut structure, no axial relative movement between the rolle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K1/56B21J13/02
Inventor 张大伟赵升吨吴士波
Owner XI AN JIAOTONG UNIV
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