CN104259286A

CN104259286A - Method for curving bottom of steel ladle through press

Info

Publication number: CN104259286A
Application number: CN201410373416.8A
Authority: CN
Inventors: 王乃时; 李涛; 陆荣
Original assignee: MCC SFRE Heavy Industry Equipment Co Ltd
Current assignee: MCC SFRE Heavy Industry Equipment Co Ltd
Priority date: 2014-07-31
Filing date: 2014-07-31
Publication date: 2015-01-07
Anticipated expiration: 2034-07-31
Also published as: CN104259286B

Abstract

The invention discloses a method for curving the bottom of a steel ladle through a press. The method comprises the following steps: step 1, manufacturing an upper die and a lower die; step 2, blanking according to the size of the bottom of a steel ladle to be named as base metal; step 3, fixing the upper die to the lower end of an upper hammer head of a press, and arranging the lower die on a lower worktable of the press; step 4, pre-heating the base metal, preserving the heat, flatly placing and centering the pre-heated base metal on the lower die, controlling the upper hammer head of the press to move downwards to drive the upper die to punch down so as to press the base metal placed on the lower die and enable the base metal to be subjected to plastic deformation till the lower surface of the base metal is in full contact with the lower worktable; and step 5, hoisting the lower die, and taking out the formed bottom of the steel ladle. According to the invention, the structure is simple, and raw materials (not including a pressure head) are saved, so that the cost is relatively low, and a medium plate shaped like a pot bottom can be curved through pressing so long as the pressure of the press meets the requirement.

Description

Forcing press is utilized to carry out method curved at the bottom of molten steel handbag

Technical field

The invention belongs to Machining Technology field, relate to a kind of forcing press that utilizes and carry out method curved at the bottom of molten steel handbag.

Background technology

The steel ladle that existing iron and steel enterprise uses, some bag end (bottom) is with the curved pan Bottom Shape of steel plate, but due to the restriction by thickness of slab, shape, manufacture difficulty is very large, and waste material with forging, need secondary cut pressure head, processing cost is large; As adopted foundry goods then one integral piece poor-performing, technical requirement can not be met.

Summary of the invention

The invention provides a kind of forcing press that utilizes and carry out method curved at the bottom of molten steel handbag, solve in prior art and need secondary cut pressure head after forging and stamping, waste material, the problem not easily corrected.

The technical solution used in the present invention is, a kind of forcing press that utilizes carries out method curved at the bottom of molten steel handbag, specifically implements according to following steps:

Step 1, making upper die and lower die,

Step 2, according to bag the end size carry out steel plate cutting, be called mother metal, blanking shape be circle;

Step 3, be fixed on by patrix on the upper ram lower end of forcing press, be placed on by counterdie on the lower table of forcing press, upper die and lower die centering is arranged;

Step 4, mother metal is preheated to is not less than 600 DEG C, and be incubated 6h ± 0.5h, preheated mother metal to be lain on counterdie and centering, controlled pressure machine upper ram moves down and drives patrix undershoot, exerts pressure make mother metal plastic deformation until mother metal lower surface touches lower table completely to the mother metal be placed on counterdie;

Step 5, counterdie to be sling, take out at the bottom of shaping bag.

The forcing press that utilizes of the present invention carries out method curved at the bottom of molten steel handbag, and its feature is also:

Described counterdie adopts steel plate installed-welded to form, and on counterdie internal diameter, edge is R1 fillet; Counterdie upper surface circumferentially uniform welding has multiple locating piece, and the interior circular diameter that all locating pieces surround is designated as Φ 1; Counterdie lower surface circumferentially uniform welding has multiple contour pad.

Described patrix is by steel plate machine-shaping, and under patrix cylindrical, edge is R2 fillet and mates with the filleted corner at the bag end;

The main body of described patrix is provided with multiple air-vent vertically.

The invention has the beneficial effects as follows: the pressure provided by forcing press carries out method curved at the bottom of steel ladle by simple mould, and the pressure utilizing forcing press to provide is suppressed steel plate by simple mould.As long as the method by the adjustment of upper/lower die fit clearance rationally, is namely easy to use.

Accompanying drawing explanation

Fig. 1 is finished product structure schematic diagram at the bottom of the bag of processing object of the present invention;

Fig. 2 is the lower die structure schematic diagram adopted in the inventive method;

Fig. 3 is that the counterdie in Fig. 2 looks up structural representation;

Fig. 4 is the upper die structure schematic diagram adopted in the inventive method;

Fig. 5 is that the inventive method implements curved front schematic diagram;

Fig. 6 be the inventive method implement curved after schematic diagram.

In figure, 1. upper ram, 2. patrix, 3. wrap the end, 4. counterdie, 5. lower table, 6. air vent, 7. locating piece, 8. contour pad.

Detailed description of the invention

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

As Fig. 1, be finished product structure schematic diagram at the bottom of the bag of processing object of the present invention, outer circumferential edge is along height H, and outer circumferential edge is Φ diametrically, chassis thickness h.

If Fig. 2, Fig. 3 and Fig. 4 are the mould schematic diagram that the inventive method adopts, comprise patrix 2 and counterdie 4 correspondence composition, patrix 2 is fixed on forcing press upper ram 1, and counterdie 4 is fixed on forcing press lower table 5.

As Fig. 2, Fig. 3, counterdie 4 adopts steel plate installed-welded to form, and counterdie 4 inner major diameter is Φ 0, counterdie 4 body thickness h1, and on counterdie 4 internal diameter, the R1 fillet on edge adopts processing mode to make, and arc surface keeps smooth, and during use, best coating lubricating oil is to reduce curved resistance.Counterdie 4 upper surface circumferentially uniform welding has multiple locating piece 7 to be convenient to steel plate location, and realize location centering, the interior circular diameter that all locating pieces 7 surround is designated as Φ 1; Counterdie 4 lower surface circumferentially uniform welding has multiple contour pad 8, is convenient to blanking.

As Fig. 4, patrix 2 is by steel plate machine-shaping, and patrix 2 thickness is h2, and patrix 2 outside diameter is Φ 2, and under cylindrical, the R2 fillet on edge mates with the filleted corner at the bag end.The main body of patrix 2 is provided with vertically multiple (embodiment is four) air-vent 6, is convenient to discharge emission gases in pressing process.

The concise and to the point technical process of the inventive method is: by bag end size make mould (each 1 cover of the upper and lower mould of correspondingly-sized)-→ to bag end unfolding and cutting-→ mother metal entirety enter stove preheating-→ realized curved on forcing press by mould.

It is curved that the inventive method utilizes forcing press to carry out, and adopts above-mentioned mould, specifically implements according to following steps:

Step 1, according to Fig. 2, Fig. 3, Fig. 4, make patrix 2 and counterdie 4,

Step 2, according to Fig. 1, according to bag the end size to steel plate cutting, be called bag the end mother metal, blanking shape be circle, available numerical control cutting machine gas cutting;

Step 3, according to Fig. 5 mounting structure, be fixed on by patrix 2 on upper ram 1 lower end of forcing press, be placed on by counterdie 4 on the lower table 5 of forcing press, patrix 2 and counterdie 4 centering are arranged;

Step 4, consider that the temperature of mother metal (steel plate) in moving process between station has reduction, mother metal is preheated to and is not less than 600 DEG C, and be incubated 6h ± 0.5h, preheated mother metal to be lain on counterdie 4 and centering, controlled pressure machine upper ram 1 moves down and drives patrix 2 undershoot, the mother metal be placed on counterdie 4 is exerted pressure and makes mother metal plastic deformation until mother metal lower surface touches lower table 5 completely, see Fig. 6;

Step 5, counterdie 4 to be sling, to take out at the bottom of shaping bag 3.

It is to be noted that

1) the R2 circular arc place size of counterdie 4 can not be less than 60mm, and circular arc is too little, easily tears bag end mother metal (steel plate).

2) the R2 circular arc place of counterdie 4 and internal diameter must be processed or polish smooth, and are coated with lubricant at counterdie 4 relevant position when curved, reduce friction, otherwise can pull the bag end mother metal outer surface during punching press.

3) the monolateral gap of upper/lower die (Φ 0-Φ 2)/2-h) to ensure at 9-10mm, gap is too little easily tears bag end mother metal.

4) pressure of forcing press must ensure as calculated.Because bag base thickness degree is comparatively large time curved, the general heat that adopts is bent shaping, to improve material ductility, ensures that the Reducing thickness at R place is in the scope of tolerance.

The inventive method step is succinct, manufacture mould simple, counterdie places mother metal, patrix moves downward under forcing press drives, mother metal on counterdie is suppressed, one-shot forming, wherein when the accuracy of unfolding and cutting and compacting, mother metal center overlaps with upper and lower mould center line is the factor of most critical.Solve the problem that prior art controls difficulty in the curved process in the bag end, and do not need secondary cut pressure head, reach the object of saving material.

Claims

1. utilize forcing press to carry out a method curved at the bottom of molten steel handbag, its feature is, specifically implements according to following steps:

Step 1, making patrix (2) and counterdie (4),

Step 3, patrix (2) is fixed on upper ram (1) lower end of forcing press, be placed on by counterdie (4) on the lower table (5) of forcing press, patrix (2) and counterdie (4) centering are arranged;

Step 4, mother metal is preheated to is not less than 600 DEG C, and be incubated 6h ± 0.5h, preheated mother metal is lain in the upper also centering of counterdie (4), controlled pressure machine upper ram (1) moves down and drives patrix (2) undershoot, exerts pressure make mother metal plastic deformation until mother metal lower surface touches lower table (5) completely to the mother metal be placed on counterdie (4);

Step 5, counterdie (4) to be sling, take out (3) at the bottom of shaping bag.

2. the forcing press that utilizes according to claim 1 carries out method curved at the bottom of molten steel handbag, and its feature is: described counterdie (4) adopts steel plate installed-welded to form, and on counterdie (4) internal diameter, edge is R1 fillet; Counterdie (4) upper surface circumferentially uniform welding has multiple locating piece (7), and the interior circular diameter that all locating pieces (7) surround is designated as Φ 1; Counterdie (4) lower surface circumferentially uniform welding has multiple contour pad (8).

3. the forcing press that utilizes according to claim 1 carries out method curved at the bottom of molten steel handbag, and its feature is: described patrix (2) is by steel plate machine-shaping, and under patrix (2) cylindrical, edge is R2 fillet and mates with the filleted corner at the bag end.

4. the forcing press that utilizes according to claim 3 carries out method curved at the bottom of molten steel handbag, and its feature is: the main body of described patrix (2) is provided with multiple air-vent (6) vertically.