CN103752739A

CN103752739A - Rolling method of thread and spline

Info

Publication number: CN103752739A
Application number: CN201310724874.7A
Authority: CN
Inventors: 姜电波
Original assignee: Yuyao Dianbo Machinery Co Ltd
Current assignee: Yuyao Dianbo Machinery Co Ltd
Priority date: 2013-12-19
Filing date: 2013-12-19
Publication date: 2014-04-30

Abstract

A rolling method of a thread and a spline is characterized in that a work piece is clamped firstly, the work piece perform feed movements towards a rolling mold, the work piece is provided with a first rolling shaping portion and a second rolling shaping portion, the rolling mold is provided with a portion in a spline shape and a portion in a thread shape, the first rolling shaping portion on the work piece enters into the working range of the portion in the spline shape and forms the spline by being rolled through the portion in the spline shape, and simultaneously the second rolling shaping portion of the work piece enters into the working range of the portion in the thread shape and forms the thread by being rolled through the portion in the thread shape, and finally the work piece is clamped by a tip, and simultaneously reversely exits so as to be discharged. The rolling method of the thread and the spline integrates thread rolling with spline rolling, achieves simultaneous rolling shaping of the thread and the spline of a thread and spline coaxial part, reduces time used for shaping the part through rolling, improves shaping quality of the work piece, can guarantee stability of the relative position of the thread and the spline, and has the advantages of being high in production efficiency, stable in shaping quality, wide in processing range, and convenient to adjust.

Description

The method of a kind of screw thread spline roll extrusion

Technical field

The invention belongs to advanced material forming technique field, be specifically related to the method for a kind of screw thread spline roll extrusion.

Background technology

In steering axles, speed changer, planetary roller screw pair, the crucial axial workpiece of transmission power and moment of torsion often has screw thread and spline or fine module gear feature simultaneously.Along with developing rapidly of automobile and equipment manufacture, requirement and demand to such element precision and performance increase day by day.

But at present,, the coaxial part of screw thread spline in planetary roller screw pair adopts machining more, is formed separately screw thread and spline in different time.Not only efficiency is low, cut off metallic fiber also can shadow to part machinery performance.For parts such as steering spindle, transmission output shafts, adopt the existing rolling forming process without cutting to be shaped, in different time, be formed separately screw thread and spline, mainly contain following two kinds of methods: a kind of method is to realize and being shaped on multiple work step multiple devices, need to repeatedly be installed, the production time is long; Another kind method is that screw thread, spline roll die are installed on an equipment, is formed separately screw thread and spline in different time, and the production time reduces to some extent than a kind of front method, but has increased size and the complexity of roll unit.In becoming to produce in batches, all there is the problems such as cost is high, efficiency is low, and be also difficult to guarantee the uniformity of screw thread spline relative position.In the patent that is US20070209419A1 at publication number, disclosed a kind of method that screw thread and spline twist shaping simultaneously.But due to the restriction of board-like thread rolling machine structural principle, in the quality of production, processing technology, the range of work and application, all there is limitation, many specifications, many various workpieces adjustment trouble.

Summary of the invention

In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide the method for a kind of screw thread spline roll extrusion, effectively reduced the time of rolling forming part, improve Forming Workpiece quality, can guarantee that screw thread and spline relative position are stable, have advantages of that production efficiency is high, forming quality stable, the range of work is wide, easy to adjust.

In order to achieve the above object, the technical solution used in the present invention is:

A method for screw thread spline roll extrusion, comprises the steps:

Step 1, clamping workpiece 3, workpiece 3 clamps by top 1, and the axis of same two roll dies 2 of axis of assurance workpiece 3 is in same level, and two roll die 2 axis are parallel, are symmetrically distributed in workpiece 3 both sides;

Step 2, workpiece 3 is to roll die 2 direction feedings; On workpiece 3, there are the first rolling forming part 31 and the second rolling forming part 32, on roll die 2, have and there is spline-shaped part 21 and there is screw thread form part 22; The first rolling forming part 31 of workpiece 3 enters the working range on roll die 2 with spline-shaped part 21, by having spline-shaped part 21 rolling forming splines; Meanwhile, the second rolling forming part 32 of workpiece 3 enters the working range on roll die 2 with screw thread form part 22, by having screw thread form part 22 rolling forming screw threads;

Step 3, two synchronous rotating in same directions of roll die 2, workpiece 3 rotates between two roll dies 2, workpiece 3 direction of rotation are contrary with roll die 2 direction of rotation, two roll dies 2 are made radial feed simultaneously, until complete the rolling forming of the first rolling forming part 31 and the second rolling forming part 32 on workpiece 3;

Part 4 has splined section 41 and threaded portion 42 simultaneously, on workpiece 3, the first rolling forming part 31 is by having spline-shaped part 21 rolling forming splined section 41 on roll die 2, and on workpiece 3, the second rolling forming part 32 is by having screw thread form part 22 rolling forming threaded portions 42 on roll die 2;

The number of teeth of the splined section 41 of part 4 is Z, and the number of starts of threaded portion 42 is n; Spline-shaped part 21 numbers of teeth that have of roll die 2 are Z ₂, the number of starts with screw thread form part 22 is n ₂; Z, n., Z ₂., n ₂meet formula

The maximum tooth tip circle place peripheral speed on roll die 2 with spline-shaped part 21 is 9-11m/min; Workpiece 3 often turns, and the radial feeds of roll die 2 are 0.05-0.1mm/r;

Step 4, workpiece 3 clamps and oppositely exits by top 1 simultaneously, discharging.

The present invention, by integrated to rolling screw-threads and spline roll extrusion, has realized the screw thread spline simultaneously rolling forming of screw thread spline with axial workpiece; On roll die, have and there is spline-shaped part and there is screw thread form part, screw thread and the spline teeth of different parts on formation of parts simultaneously in a rolling forming; Can reduce curring time, improve forming quality, guarantee with the screw thread of batch part consistent with spline relative position.

Accompanying drawing explanation

Fig. 1 is equipment therefor connection diagram of the present invention.

Fig. 2 is the workpiece 3 rolling forming pre-structure schematic diagrames of the embodiment of the present invention.

Fig. 3 is roll die 2 axonometric drawings of the embodiment of the present invention.

Fig. 4 has the shaft parts mapping of screw thread and spline when being the embodiment of the present invention.

The specific embodiment

Below in conjunction with drawings and Examples, the present invention is described in detail.

The material of the present embodiment workpiece 3 adopts 45 steel, and formed thereby part 4 has splined section 41 and threaded portion 42 simultaneously.

A method for screw thread spline roll extrusion, comprises the steps:

Step 1, with reference to Fig. 1, clamping workpiece 3, workpiece 3 clamps by top 1, and the axis of same two roll dies 2 of axis of assurance workpiece 3 is in same level, and two roll die 2 axis are parallel, are symmetrically distributed in workpiece 3 both sides;

Step 2, workpiece 3 is to roll die 2 direction feedings; With reference to Fig. 2, on workpiece 3, there are the first rolling forming part 31 and the second rolling forming part 32, with reference to Fig. 3, on roll die 2, have and there is spline-shaped part 21 and there is screw thread form part 22; The first rolling forming part 31 of workpiece 3 enters the working range on roll die 2 with spline-shaped part 21, by having spline-shaped part 21 rolling forming splines; Meanwhile, the second rolling forming part 32 of workpiece 3 enters the working range on roll die 2 with screw thread form part 22, by having screw thread form part 22 rolling forming screw threads;

With reference to Fig. 4, part 4 has splined section 41 and threaded portion 42 simultaneously, on workpiece 3, the first rolling forming part 31 is by having spline-shaped part 21 rolling forming splined section 41 on roll die 2, and on workpiece 3, the second rolling forming part 32 is by having screw thread form part 22 rolling forming threaded portions 42 on roll die 2;

With reference to Fig. 4, the tooth number Z of the splined section 41 of part 4 is 20, and the number of starts n of threaded portion 42 is 1; With reference to Fig. 3, roll die 2 to have spline-shaped part 21 tooth number Z 2 be 200, there is the number of starts n of screw thread form part 22 ₂be 10; Z, n., Z ₂., n ₂meet formula

\frac{Z_{2}}{Z} = \frac{n_{2}}{n}

On roll die 2, having spline-shaped part 21 maximum tooth tip circle place peripheral speeds is 9.5m/min; Workpiece 3 often turns, and the radial feeds of roll die 2 are 0.05mm/r;

Claims

1. the method for screw thread spline roll extrusion, it is characterized in that, comprise the steps: step 1, clamping workpiece (3), workpiece (3) is clamped by top (1), the axis of same two roll dies (2) of axis of assurance workpiece (3) is in same level, and two roll dies (2) axis is parallel, is symmetrically distributed in workpiece (3) both sides;

Step 2, workpiece (3) is to roll die (2) direction feeding; On workpiece (3), there are the first rolling forming part (31) and the second rolling forming part (32), on roll die (2), have and there is spline-shaped part (21) and there is screw thread form part (22); The first rolling forming part (31) of workpiece (3) enters to be had spline-shaped part on roll die (2) (2 generals' working range, by having spline-shaped part (21) rolling forming spline; Simultaneously, the second rolling forming part (32) of workpiece (3) enters the working range on roll die (2) with screw thread form part (22), by having screw thread form part (22) rolling forming screw thread;

Step 3, the synchronous rotating in same direction of two roll dies (2), workpiece (3) rotates between two roll dies (2), the same roll die of workpiece (3) direction of rotation (2) direction of rotation is contrary, two roll dies (2) are made radial feed simultaneously, until complete the rolling forming of upper the first rolling forming part (31) of workpiece (3) and the second rolling forming part (32);

Part (4) has splined section (41) and threaded portion (42) simultaneously, upper the first rolling forming part (31) of workpiece (3) is by having spline-shaped part (21) rolling forming splined section (41) on roll die (2), and upper the second rolling forming part (32) of workpiece (3) is by having screw thread form part 22 rolling forming threaded portions (42) on roll die (2); The number of teeth of the splined section (41) of part (4) is Z, and the number of starts of threaded portion (42) is n; Roll die (2) to have spline-shaped part (21) number of teeth be Z ₂, the number of starts with screw thread form part (22) is n ₂; Z, n., Z ₂., n ₂meet formula

the maximum tooth tip circle place peripheral speed on roll die (2) with spline-shaped part (21) is 9-11m/min; Workpiece (3) often turns, and the radial feeds of roll die (2) are 0.05-0.1mm/r; Step 4, workpiece (3) is clamped and is oppositely exited by top (1) simultaneously, discharging.