CN101722270A - Wind driven generator principal shaft molding technique - Google Patents

Abstract

A wind driven generator principal shaft molding technique belongs to the technical field of machinofacture. The special mold is composed of an upper mold and a lower mold. The molding technique is as follows: 1 primary heating: pressing pincers handle by steel ingot, drawing and feeding; 2. secondary heating: performing local heating to 1100-1300 DEG C, putting into the mold, upsetting flange to produce the finished product. The invention simplifies the megawatt level wind driven generator principal shaft molding technique, provides special upsetting and pressing devices, and artfully solves the problem that the larger end can not be upset after forging the bar part due to the limit of press clear distance. The molding is carried out by directly upsetting the larger end after feeding, thus reducing weight, heating number and cost, and improving efficiency and product competitiveness.

Description

Wind driven generator principal shaft molding technique

Technical field

The invention belongs to machinery manufacturing technology field, relate to a kind of wind driven generator principal shaft manufacturing process and equipment.

Background technology

At present, traditional blower fan main shaft forging molding process is made up of following process:

First fire: steel ingot pressing tongs handle, chamfered edge, cut the mouth of a river;

Second fire: ingot jumping-up, the pulling of wide anvil;

The 3rd fire: ingot jumping-up, the pulling of wide anvil;

The 4th fire: jumping-up, pull out, cut shoulder,

The 5th fire: forge each one to size, finishing, alignment, go out finished product.

The shortcoming of traditional handicraft is:

(1), fire is time more, inefficiency;

(2), owing to adopt and to cut the technology that shoulder is forged small stair, excessively locate fiber and be cut off, the ingotism band exposes the forging surface, knuckle place insufficient strength.

(3), because adopt the open die forging moulding fully, surplus is bigger.

(4), time more and last fiery forging ratio of big roundlet differs bigger because of fire, easily produces the coarse-grain defective.

Summary of the invention

In order to overcome the deficiencies in the prior art, the invention provides a kind of wind driven generator principal shaft molding technique and Upsetting and forge equipment, axle body does not have forging ratio when forging major part to solve in main transformer shape and the forming process, and it is overheated even easily to produce coarse-grain, the headroom of press is apart from limited, problem such as advances not go during moulding.

The technical solution adopted for the present invention to solve the technical problems is to simplify moulding process, and die apparatus is set, and its moulding process is as follows:

First fire: steel ingot pressing tongs handle, pulling blanking;

Second fire: local heat is gone into mould rammer flange to 1100--1300 ℃, goes out finished product.

The present invention is provided with the mould supporting with press, and mould is a monolithic construction, is made up of upper die and lower die two parts, and patrix is a flange-shaped structure, and counterdie is columnar structured, and the mould inner-cavity structure is decided on the main shaft profile up and down.

Adopting good effect of the present invention is to have simplified MW class wind turbine main shaft moulding process, is provided with Upsetting forging and pressing special equipment, has solved cleverly because of can't upset again after the forging bar portion problem of major part of the restriction of press headroom distance.After having adopted blanking, directly the jumping-up major part is shaped.Thereby alleviated weight, reduced fiery time, reduced cost, improved efficient and competitiveness of product.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified:

Accompanying drawing 1 is the mould structure schematic diagram;

1 press, 2 Upper Die-sleeves, 3 lower die-sleeves, 4 forging among the figure;

The specific embodiment

As shown in the figure; At first, make mould according to the desired main shaft shape of wind power principal axis, mould adopts monolithic construction, mould is made up of Upper Die-sleeve (2) and lower die-sleeve (3) two parts, Upper Die-sleeve (2) is a flange-shaped structure, lower die-sleeve (3) is columnar structured, upper and lower die sleeve inner-cavity structure and main shaft profile match, wherein entire die is forged the back outer surface without processing, and inner surface requires to be machined to suitable dimensions to make things convenient for the production of forging according to the concrete shape and size of forging (4), and supporting with press (1), blower fan main shaft solid forging moulding process is as follows:

First fire: steel ingot pressing tongs handle, pulling blanking;

Second fire: at first steel ingot is heated to 1000 ℃ of initial forging temperatures in the process of forging, blanking is to the size about the same with the mold cavity endoporus, after blank is placed in the mould by the pressure forming forging, go into mould rammer flange, go out finished product.

Claims (1)

1. a wind driven generator principal shaft molding technique is characterized in that being provided with particular manufacturing craft, and particular manufacturing craft is made up of upper die and lower die two parts, patrix is a flange-shaped structure, counterdie is columnar structured, and the upper and lower mould inner-cavity structure is decided on the main shaft profile, and its moulding process is as follows:

First fire: steel ingot pressing tongs handle, pulling blanking;

Second fire: local heat is gone into mould rammer flange to 1100--1300 ℃, goes out finished product.