CN2865958Y

CN2865958Y - Divided cutting shears plate

Info

Publication number: CN2865958Y
Application number: CN 200620039299
Authority: CN
Inventors: 钱荣福; 吴成军; 郑雨旸; 陆云
Original assignee: Baoshan Iron and Steel Co Ltd
Current assignee: Baosteel Special Steel Co Ltd
Priority date: 2006-01-26
Filing date: 2006-01-26
Publication date: 2007-02-07
Anticipated expiration: 2016-01-26

Abstract

A new-type plate shear, which is comprised of upper and lower cutting board. Their corresponding edges are respectively notched. In addition, bottom height H of notches on the lower cutting board is identical as well as the same Alpha opening angle. However, all notches on the upper cutting board feature varied bottom height H and opening angle Alpha. In detail, all notches on the upper cutting board alternate in terms of deep and shallow notch. The utility model has changed the shearing, stressing and cutting mode of the traditional shearing and replaced the synchronous shearing with the synchronous shearing in batch of the same shearing range. Moreover, the utility model cuts the same vertical section of a layer of rod asynchronously but transiently, thus efficiently reducing maximum shearing load P and enlarging cutting capacity by more than 30%. Meanwhile, it has eliminated limit of shear capacity on production capacity and remarkably improved the total cross section.

Description

A kind of novel scissors plate of cutting

Technical field

The utility model relates to metallurgical pressure processing, and what be used for round steel bar steel rolling production-line cold shears cuts the scissors plate.

Background technology

The shearing machine knife plate is the common equipment (device) of metallurgical pressure processing, is installed on the round steel bar steel rolling production-line cold shears, be positioned at roll back finished product cooled region after, its effect is that bar is according to the contract required segmentation, scale.

Traditional shearing machine knife plate design has two:

1. the bottom land height H that goes up each hole slot 101 of knife plate 10 bottoms (following knife plate top) equates that each pass opening angle α equates that last knife plate lower plane is parallel with plane (horizontal line) on the following knife plate, referring to Fig. 1;

2. the bottom land height H that goes up each hole slot 101 of knife plate 10 bottoms (following knife plate top) equates that each pass opening angle α equates that there is angle β on plane (horizontal line) on last knife plate 10 lower planes and the following knife plate 20, referring to Fig. 2.

The shortcoming of above-mentioned 2 kinds of shearing machine knife plates is: when bar was sheared in hole slot, stress was concentrated and is not disperseed; That is to say,

Design 1, the hole slot bottom land is positioned at same horizontal, and in same cutting stroke, shearing force is concentrated, and under shearing equipment intensity, power condition of limited, restriction shearing quantity (the shearing radical of one deck bar of arrangement is restricted) becomes bottleneck in the production;

Design 2, hole slot bottom land are positioned on the same oblique line with horizontal line angle β, and because of being subjected to shearing the length of knife plate and the restriction of cutting stroke, the effect that enlarges shearing quantity is also not obvious.

Cold shears knife plate with 1 meter long of 400 tons of cold shears is an example, by traditional shearing machine knife plate design, shears Φ 50, knife plate hole slot radius R 26, adjacent holes groove center spacing 120mm, totally 6 hole slots, two side holes separation 600mm, scissors plate center line and horizontal line angle β=4 °.Calculate the difference in height h=8.39mm of adjacent hole slot, the height difference H of both sides hole slot=41.96; So the difference in height h in its adjacent two holes is too small, (spring steel 60Si2Mn ε 0 when shearing for 300 ℃ is 0.21, i.e. the ε of Φ 50 less than closing knot, carbon knot, spring steel etc. ₀Be 10.5mm) the relative penetraction depth ε of maximum when rupturing ₀And the height of both sides hole slot (H) difference is excessive, has exceeded the range of shearing machine.

Summary of the invention

The purpose of this utility model is to design a kind of novel scissors plate of cutting, the shear stress that can solve the design of the segmentation of conventional scissors plate, scale scissors and face is concentrated, or because of the oblique knife plate configuration of the restriction of cutting stroke, the problem of the poor effect that shear stress disperses.

For reach above-mentioned purpose, the technical solution of the utility model is,

A kind of novel scissors plate of cutting, it comprises upper and lower knife plate, the relative blade part of this upper and lower knife plate correspondence respectively offers hole slot; The bottom land height H of each hole slot on the following knife plate equates that each hole slot pass opening angle α equates; The bottom land height H of each hole slot on the last knife plate is unequal, and each hole slot pass opening angle α is unequal.

Described each hole slot of going up on the knife plate is provided with at interval by dark, shallow bore hole type; Or, be provided with at interval in pairs by dark, shallow bore hole type.

The described difference in height that goes up the bottom land of each the adjacent hole slot on the knife plate: H1-H2=Δ H＞ε ₀, ε ₀The maximal phase that is shear fracture is to penetraction depth, steel grade difference, ε ₀The numerical value difference.

The utility model uses relative penetraction depth and shear-type load changes corresponding relation, design and develop, the shearing of traditional shearing segmentation, stressed, cut-out mode have been changed, become to be cut into simultaneously and cut simultaneously in batches, traditional shearing design, working method have been changed, be originally in same cutting stroke, the same vertical plane of one deck bar of arranging is sheared simultaneously; Change in the same cutting stroke, simultaneously the same vertical plane of one deck bar of arranging is not cut off, effectively reduce the maximum shear load p, enlarge shear ability more than 30% in moment; Solve the problem of the shearing equipment capabilities limits production capacity of manufacturer, improved the sectional area summation of shearing significantly.

Description of drawings

Fig. 1 is the schematic diagram of existing cold shears knife plate;

Fig. 2 is another structural representation of existing cold shears knife plate;

Fig. 3 is the schematic diagram of the utility model one embodiment;

Fig. 4 is the A portion enlarged diagram of Fig. 3;

Fig. 5 is the B portion enlarged diagram of Fig. 3.

The specific embodiment

Referring to Fig. 3～Fig. 5, the novel scissors plate of cutting of the present utility model, it comprises knife plate 1, following knife plate 2, the relative blade part of knife plate 1 this on, time knife plate 2 correspondence respectively offers hole slot 11,12,21; Bottom land height H 1, the H2 of each hole slot 11,12 on the last knife plate 1 are unequal, and each hole slot pass opening angle α 1, α 2 are unequal; The bottom land height H 3 of each hole slot 21,22 on the following knife plate 2 equates that each hole slot pass opening angle α equates.

Described each hole slot 11,12 of going up on the knife plate 1 is provided with at interval by dark, shallow bore hole type; The described difference in height that goes up the bottom land of each the adjacent hole slot 11,12 on the knife plate 1: H1-H2=Δ H＞ε ₀, ε ₀The maximal phase that is shear fracture is to penetraction depth, steel grade difference, ε ₀The numerical value difference.

Adopt hole slot bottom land height H 1 ≠ H2 (Fig. 3), make H1-H2=＞ε ₀Same one deck bar circumferential outer surface that the cold shears scissors is arranged from contact is to incision perpendicular end surface ε ₀This degree of depth, the shear-type load maximum, and incision surpasses ε to perpendicular end surface ₀After, shear-type load sharply descends, and shears mainly to become slippage.Pass angular aperture α 1 ≠ α 2, control is dark, the opening of shallow bore hole groove, has both guaranteed that the bar material cutting occiput flattens to spread, and has guaranteed C value between dark, the shallow bore hole groove again, has strengthened the technical scheme of the intensity of hole slot.

The novel hole slot on the knife plate 1 11,12 on the scissors (dark, shallow bore hole groove) the central distribution space D of cutting, according to the arrangement pitches decision of same one deck bar of waiting to shear arrangement, generally dark, shallow bore hole groove adjacent spaces is arranged.

Shear the pass design of hole slot, when H1-H2=Δ H＞ε 0 (maximal phase is to penetraction depth), first shallow bore hole is sheared, and after penetraction depth surpassed ε 0 (being Δ H), shear-type load P sharply descended, and deep hole is sheared then.For prevent the bar end in shear history because of flattening, in hole slot, cross and be full of, produce and shear impression, appropriate design open-angle α; Consider that the C between the hole slot is big more, knife plate intensity is high more, so open-angle α can not be excessive, too small, and design α 1 ≠ α 2.

At this novel scissors plate of cutting, flatten to produce and shear impression and influence knife plate intensity for preventing to shear the end, specially designed open-angle α (α 1=60 °, α 2=30 °), hole slot arc radius R,

By R=on the same group apart from being sheared the maximum radius+Δ of bar

Δ is bar tolerance correction value and thermal expansion value, generally gets 0.5-1mm.

The scissors plate of cutting of the present utility model is installed on the cold shears, be positioned at metallurgical medium and small bar steel rolling production line cold bed after, the bar after rolling is carried out segmentation or scale.The novel scissors plate of cutting is by different steel grades, the different plasticity of material under different shear temperature, the shear fracture maximal phase of variation is to penetraction depth, and the product design of different size group distance for not on the same group distance cut hole slot.

The scissors plate of cutting of the present utility model has disperseed concentrated shear stress under the situation of assurance equipment and scissors, solved the ability of manufacturer because of shearing equipment, has limited the problem of production capacity, has improved the shearing radical of one deck bar of arranging significantly).With in the shear history, appear at relative penetraction depth ε effectively ₀The peak-peak of the shear-type load that this is of short duration is disperseed.

Utilization the utility model is cut the scissors plate can increase shear ability, and for concrete steel grade, the shear ability that is embodied is different, and for the shear temperature difference of steel grade, shear ability is also different.But based on practical condition and need, use novel cut the scissors plate after, count 20%-30% than original shearing Zhi Zengjia.

Claims

1. novel scissors plate of cutting, it comprises upper and lower knife plate, the relative blade part of this upper and lower knife plate correspondence respectively offers hole slot; It is characterized in that,

The bottom land height H of each hole slot on the following knife plate equates that each hole slot pass opening angle α equates; The bottom land height H of each hole slot on the last knife plate is unequal, and each hole slot pass opening angle α is unequal.

2. the novel scissors plate of cutting as claimed in claim 1 is characterized in that, described each hole slot of going up on the knife plate is provided with at interval by dark, shallow bore hole type.

3. the novel scissors plate of cutting as claimed in claim 1 is characterized in that, described each hole slot of going up on the knife plate is provided with in pairs at interval by dark, shallow bore hole type.

4. the novel scissors plate of cutting as claimed in claim 1 is characterized in that, the described difference in height that goes up the bottom land of each the adjacent hole slot on the knife plate: H1-H2=Δ H＞ε ₀, ε ₀The maximal phase that is shear fracture is to penetraction depth, steel grade difference, ε ₀The numerical value difference.