CN1701908A

CN1701908A - Heat mounting method for bracket-quoit trunnion

Info

Publication number: CN1701908A
Application number: CN 200510046717
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: 2005-11-30
Anticipated expiration: 2025-06-21
Also published as: CN100364715C

Abstract

This invention relates to heat insert method for hold loop trunnion and comprises following steps: set rest pier and hold loop on pier of horizontal level; use far infrared heating plate that distributes in and out the trunnion to heat; control the process with temperature controller; the heating velocity is 50 -80DEG C/h, keep temperature for 3-4h when achieving 300Deg; lift on the trunnion with hoist to adjust and align with its center; move horizontally the hoist toward hold loop, push and move forward the trunnion on its tail to heat insert the trunnion on hold loop. This method leaves out special workpiece or device in existing technique, just needs simple tools to finish the assembly work, simplifies preparation process, decreases cost and can entire satisfy the technical request of axiality less or equal to 1mm.

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, the structure of signing an undertaking 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 the instrument amount of calculation is not big for slip frock or Design of device, 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 that 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, gudgeon 2,5 passes through respectively after the machined and

gudgeon piece

1,6 hot inserts, its both sides gudgeon 2,5 satisfies axiality and is less than or equal to the 1mm specification requirement, sees 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

gudgeon

2,5 hot insert operations.

Gudgeon 2,5 adjustment levels are got up gudgeon 2 or gudgeon 5 usefulness crane liftings, foreign material in the gudgeon hole will be removed before the dress axle, as shown in Figure 3, hang gudgeon 2 or gudgeon 5 with band protective sleeve steel wire rope, and 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 gudgeon 2 or 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 gudgeon 2 and gudgeon 5 are all packed into, then immediately with gudgeon 2 and 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 this moment must clear maintenance two gudgeon pieces (1), mark when machined (6) outer face 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 that thermal expansion meets technology on the gudgeon bore dia, stop heating;

C, gudgeon (2) or 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 gudgeon (2) or gudgeon (5) are moved to the gudgeon hole side that will pack into crane and align the two cross centre line;

D, treat gudgeon (2) or 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 gudgeon (2) and gudgeon (5) are all packed corresponding gudgeon hole into.