CN100364715C

CN100364715C - Heat mounting method for bracket-quoit trunnion

Info

Publication number: CN100364715C
Application number: CNB2005100467170A
Authority: CN
Inventors: 马才; 滕宏鹏; 谭立新; 黄仲宁; 朱立国; 万璀钰; 陈凯; 郭文君
Original assignee: Bohai Shipbuilding Heavy Industry Co Ltd
Current assignee: Bohai Shipbuilding Heavy Industry Co Ltd
Priority date: 2005-06-21
Filing date: 2005-06-21
Publication date: 2008-01-30
Anticipated expiration: 2025-06-21
Also published as: CN1701908A

Abstract

The present invention relates to a thermal enchasing method for trunnions of a backing ring, which comprises the following steps: a supporting pier is arranged, a backing ring is placed on the arranged supporting pier, and is adjusted to level condition; far infrared heating sheets are uniformly distributed in the holes of trunnions of a backing ring, and the inner sides and the outer sides of trunnion blocks are heated; the heating process is controlled by a temperature controller; the temperature rise speed is from 50 to 80 DEG C /h; the temperature is kept for 3 hours to 4 hours after the temperature reaches 300DEG C; the trunnions are hung by a crane, and the level of the trunnions is adjusted so that the center of the trunnions is aligned to the center of the trunnion holes; after the center of the trunnions is aligned to the center of the trunnion holes, the crane is flatly moved to the backing ring; the trunnions are forwards pushed by manpower at the tail parts of the trunnions so that the trunnions are enchased on the backing ring in a thermal mode. The method cancels the traditional special thermal enchasing process tool or apparatus, and the assembly work of the trunnions at both sides of the backing ring are finished in a short time by using a simple lifting device; the manufacture process is simplified, and the production cost is reduced. The technical requirement that the coaxiality of the trunnions at both sides of a large backing ring is smaller than or equal to 1mm is completely met.

Description

Heat mounting method for bracket-quoit trunnion

(1) technical field

The present invention relates to the mutual assembly method of large-scale shaft workpiece and axis hole, particularly relate to heat mounting method for bracket-quoit trunnion.

(2) background technology

Backing ring is the key equipment of steelmaking converter, and according to the method for attachment of gudgeon piece on gudgeon and the backing ring, its structure can be divided into two kinds of forms: a kind of is the backing ring that the gudgeon piece adopts Type of Welding on gudgeon and the backing ring; Another kind is the backing ring of the hot insert form of gudgeon piece after gudgeon and the machined, and its gudgeon and gudgeon piece adopt the interference fits assembling, and the backing ring structure is seen Fig. 1.Backing ring is a steel welding construction spare, form by two fan-shaped section and two gudgeon block weldings, the backing ring of described hot insert form is to adopt hot insert technology that the both sides gudgeon is respectively charged in the gudgeon hole on the two gudgeon pieces, and the both sides gudgeon behind hot insert reaches the specification requirement of axiality.The hot insert of gudgeon is a key technology during whole backing ring is made, in the assembling process of gudgeon, must be aided with accurate slip frock or device and bigger controlled external force in the past and can finish hot edge work, only in this way, just can avoid the uncontrollable of the truck phenomenon that occurs in the hot insert process and external force and the appearance of the accidents such as workpiece damage that cause.Yet slip frock or Design of device not only amount of calculation are big, and the making of frock has strengthened cost.Generally speaking, though safe and reliable for the hot insert work of converter trunnion ring gudgeon, product economy is of poor benefits, and the production cycle is long, not can be the preferred plan of technology.

(3) summary of the invention

The technical problem to be solved in the present invention, provide based on the heating process of gudgeon piece and the heat in gudgeon hole and expand data, only adopt simple auxiliary hanging device to finish the assembly work of backing ring both sides gudgeon, improve the product economy benefit, shorten the production cycle, time saving and energy saving heat mounting method for bracket-quoit trunnion.

The technical scheme that adopts is:

Heat mounting method for bracket-quoit trunnion comprises following processing step:

(1) lay buttress according to the physical dimension of backing ring, backing ring is placed on the buttress of laying, it is adjusted to level, the gudgeon hole cross centre line that must keep two gudgeon piece outer faces to mark when machined this moment is clear;

(2) the FAR INFRARED HEATING sheet evenly is laid in backing ring, the outside in gudgeon hole and the gudgeon piece, and spread on the FAR INFRARED HEATING sheet outside with insulation material, utilize the computer temperature control instrument that heating process is controlled, programming rate is 50-80 ℃/h, holding temperature is 300-350 ℃, temperature retention time is 3-4 hour, the size adjusting of measuring the T-shaped measuring stick of gudgeon bore dia is added 1.5-2mm for heating vestibule shaft hole diameter, in insulating process, detect the gudgeon hole with T-shaped measuring stick, when the horizontal direction and the vertical direction of T-shaped measuring stick can both pass through, be when thermal expansion meets technology on the gudgeon bore dia, stop heating;

(3) gudgeon is sling with the crane level, be connected one at the gudgeon tail end with the suspension hook of crane and pull cucurbit,, then gudgeon is moved to the gudgeon hole side that will pack into crane and align the two cross centre line to adjust the level of gudgeon;

(4) treat the gudgeon center and corresponding center, gudgeon hole align after, crane to the backing ring translation, is passed forward with manpower at the gudgeon afterbody simultaneously, until the two gudgeons corresponding gudgeon hole of all packing into, realize heat mounting method for bracket-quoit trunnion.

The good effect that the present invention obtains is: simplified hot insert frock design and fabrication, reduced production cost, shortened the production cycle, satisfied the specification requirement of two gudgeon axialities smaller or equal to 1mm fully.

(4) description of drawings

Fig. 1 is the backing ring structural representation.

Fig. 2 is the layout drawing of FAR INFRARED HEATING sheet on backing ring.

Fig. 3 is ring trunnion assembling schematic diagram.

Fig. 4 is the vertical view of Fig. 3.

(5) specific embodiment

The hot inserting method of backing ring comprises following processing step:

According to backing ring by two fan-

shaped section

3,4 and two

gudgeon pieces

1,6 structure that is welded as a whole, process the gudgeon hole by boring machine at both

sides gudgeon piece

1,6 after the integrally annealed, one gudgeon 2 and another gudgeon 5 pass through respectively after the machined and

gudgeon piece

1,6 hot inserts, its both sides one gudgeon 2 and another gudgeon 5 satisfy axiality and are less than or equal to the 1mm specification requirement, see Fig. 1.Backing ring is placed on the good buttress 7 of the high laying of 400-600mm, backing ring is adjusted to level, the gudgeon hole cross centre line that must keep two gudgeon pieces, 1,6 outer faces to mark when machined this moment is clear.

The heating of FAR INFRARED HEATING sheet is adopted in 1,6 heating of gudgeon piece, and the FAR INFRARED HEATING sheet is laid and seen Fig. 2.At gudgeon piece 1, backing ring FAR INFRARED HEATING sheet 8 is laid in the backing ring inboard and the outside in the 6 both sides 500mm scopes in an identical manner, at gudgeon piece 1, gudgeon piece FAR INFRARED HEATING sheet 9 is laid in 6 the inboard and the outside in an identical manner, in the gudgeon hole, lay gudgeon hole FAR INFRARED HEATING sheet 11, and it is fixing with fixed steelring 10, on backing ring and below lay top and bottom FAR INFRARED HEATING sheet 12 in an identical manner, also to apply in FAR INFRARED HEATING sheet outside with insulation material, utilize the computer temperature control instrument that heating process is controlled, programming rate is 60 ℃/h, treat that temperature reaches 300 ℃ of insulations, be incubated 4 hours.The measurement size of T-shaped measuring stick is adjusted into heating vestibule shaft hole diameter adds 1.5mm, in insulating process, detect the gudgeon hole with T-shaped measuring stick, require its horizontal direction and vertical direction to pass through, think that promptly the gudgeon bore dia is because thermal expansion increases 1.5mm, actual swell increment must not be greater than 2mm, stop heating then, carry out a gudgeon 2, another gudgeon 5 hot insert operations.

One gudgeon 2, another gudgeon 5 adjustment levels; one gudgeon 2 or another gudgeon 5 usefulness crane liftings are got up; foreign material in the gudgeon hole to be removed before the dress axle; as shown in Figure 3; hang a gudgeon 2 or another gudgeon 5 with band protective sleeve steel wire rope, the position of steel wire rope can be adjusted according to the length difference of gudgeon.Be connected one at the gudgeon tail end with suspension hook 13 and pull cucurbit 14, to adjust the gudgeon level.The practice is that gudgeon is hung the platform top, puts a square and gudgeon end by flat on platform, can think gudgeon level then gudgeon to be moved to the ring trunnion hole side that will pack into crane.Meanwhile, utilize the cross centre line centering level and the upright position of cross centre line and gudgeon end on the gudgeon piece of backing ring, gudgeon center and center, gudgeon hole are aligned.

Hot insert, after treating a gudgeon 2 or another gudgeon 5 and corresponding center, gudgeon hole aligning, with crane to the backing ring translation, rapidly gudgeon is passed forward with manpower at the gudgeon afterbody simultaneously, until its gudgeon hole that a gudgeon 2 and another gudgeon 5 are all packed into, then immediately with a gudgeon 2 and another gudgeon 5 with backing ring with bolt tight, to be cooled to the room temperature screwde on again, realize the hot insert of ring trunnion.

Claims

1. heat mounting method for bracket-quoit trunnion, its feature comprises following processing step:

A, lay buttress (7), backing ring is placed on the buttress (7) of laying, it is adjusted to level, the gudgeon hole cross centre line that must clear maintenance two gudgeon pieces (1,6) outer face mark when machined this moment according to the physical dimension of backing ring;

B, with FAR INFRARED HEATING sheet (8,9,11,12) evenly be laid in backing ring, gudgeon hole and gudgeon piece (1,6) outside in, and spread on the FAR INFRARED HEATING sheet outside with insulation material, utilize the computer temperature control instrument that heating process is controlled, programming rate is 50-80 ℃/h, holding temperature is 300-350 ℃, temperature retention time is 3-4 hour, the size adjusting of measuring the T-shaped measuring stick of gudgeon bore dia is added 1.5-2mm for heating vestibule shaft hole diameter, in insulating process, detect the gudgeon hole with T-shaped measuring stick, when the horizontal direction and the vertical direction of T-shaped measuring stick can both pass through, be when thermal expansion meets technology on the gudgeon bore dia, stop heating;

C, a gudgeon (2) or another gudgeon (5) are sling with the crane level, be connected one at the gudgeon tail end with the suspension hook (13) of crane and pull cucurbit (14), to adjust the level of gudgeon, then a gudgeon (2) or another gudgeon (5) are moved to the gudgeon hole side that will pack into crane and align the two cross centre line;

D, treat a gudgeon (2) or another gudgeon (5) center and corresponding center, gudgeon hole align after, crane to the backing ring translation, is passed forward with manpower at the gudgeon afterbody simultaneously, in a gudgeon (2) and another gudgeon (5) are all packed corresponding gudgeon hole into.