CN201848465U - Bending machine with back blocking beam with improved structure - Google Patents

Abstract

The utility model relates to a bending machine with a back blocking beam with an improved structure. The back blocking mechanism of the bending machine mainly comprises a beam, a U-shaped block, a blocking finger, a screw rod, a polished rod, a sliding block and a transmission rod, wherein a U-shaped beam with the same length is welded at the bottom of the beam; the cross section of the beam has an enclosed box-shaped structure; the upper part of the cross section is rectangular, and the lower part of the cross section is U-shaped; the outsides of both sides of the joint between the upper part and the lower part are step-shaped; the rectangular width of the upper part of the cross section is larger than the width of the U-shaped beam on the lower part; and the rectangular height of the upper part is smaller than the height of the U-shaped beam on the lower part. The cross sectional shape of the beam is optimized, so that the bending rigidity of the beam is enhanced, the flexural deformation of the beam is reduced, thus, the blocking finger is kept parallel to a mold, and the blocking accuracy is enhanced; simultaneously, the calibrating time of a machine tool is saved; and the bending machine has the advantages of simple mechanical structure, high technical adaptability, easiness of popularization and application to a hydraulic plate bending machine and the like.

Description

Bender with the back backgauge crossbeam that improves structure

Technical field

The utility model relates to the machining equipment field, especially the back backgauge section of beam design in the bender field.

Background technology

Hydrolic plate bender forms vertically downward pressure by the working solution cylinder pressure of two parallel motions, with the mould that drives on the bending beam workpiece is carried out bending work.The accurate location of workpiece in the bending process, the accuracy of guaranteeing bending position (size) is the basic function of bender, at present the general back stock stop of arranging on the bender.Back stock stop mainly by crossbeam, retaining refer to, motor, polished rod, leading screw, drive link etc. constitute.Wherein, several retainings refer to be assemblied on the crossbeam.The function of back stock stop has two, and the one, plate is accurately located before bending, and the 2nd, restriction is again clamp mechanism because of the displacement of the stressed generation of plate so the back stock stop of bender is a detent mechanism in the bending process.Plate bending angle is guaranteed by the cavity dimension of bed die, when cutter is pressed to plate in the process of bed die, plate will produce in the bending position upholds distortion, and back stock stop is upheld when being out of shape at the restriction plate, to bear very big active force, and refer to be delivered on the crossbeam by retaining.The general sheet material that approaches that adopts of backgauge crossbeam behind traditional bender, its bending strength and bending rigidity are not strong, use the back yielding for a long time at lathe, are difficult for repairing, and be inaccurate when causing retaining to refer to move on crossbeam, thereby cause the bending workpieces precise decreasing.The method of head it off has a lot, and from improving the bending strength of beam, bending normal stresses is the principal element that influences the beam anti-bending strength, and the cross sectional shape of suffered maximal bending moment of bending normal stresses and beam and beam is relevant.Given this, the bending strength that improves beam can pass through rationally to arrange the stressing conditions of beam, moves a certain distance inwards respectively as the both sides bearing with brace summer; From improving the bending rigidity analysis of beam, the deflection of beam distortion is relevant with the moment of inertia of moment of flexure size, span length, support condition, beam section and the elastic modelling quantity of material etc. as can be known by the approximate differential equation of line of deflection.So, improve version that the bending rigidity of beam can be by improving beam reducing the numerical value of moment of flexure, as the span of dwindling beam can reduce the deflection of beam distortion.Adopt above-mentioned certain methods will change the part frame for movement of back stock stop, cumbersome, specification requirement is also higher.

The domestic patent relevant with back backgauge section of beam design has two, is respectively " adjustable buffering backstop refers to (CN200620072404.2) ", " material blocking block behind a kind of bender (CN200920058658.2) ".Wherein, " adjustable buffering backstop refers to ", main utility model point was to be coaxially installed with first sliding ring and second sliding ring on gripper shoe, be movably installed with adjusting rod in first sliding ring and second sliding ring, material blocking rod is fixed on adjusting rod one end, be fixed with first clamping ring on the adjusting rod, one spring housing is contained on the adjusting rod, both ends of the spring is conflicted respectively between first sliding ring and first clamping ring, the adjusting rod other end is axially installed with adjusting screw(rod), also be provided with second clamping ring on the gripper shoe, adjusting screw(rod) passes second clamping ring and is threaded with adjusting nut, adopts this structure can realize Fast Installation, the fine setting location; " material blocking block behind a kind of bender " main utility model point is to be provided with on the material blocking block of back and allows the material piece, makes the material piece hinged with the back material blocking block, can upwards rotate relative to the back material blocking block, adopts this structure can reduce the stressed of crossbeam.Frame for movement slightly complicated in the middle of these two patents, specification requirement is higher, is unfavorable for applying.

The utility model content

On the basis of common hydrolic plate bender, after not changing bender under the prerequisite of backgauge mechanism body structure, in order to guarantee the accuracy of workpiece bending position (size) in the bending process, the utility model proposes a kind of technical scheme, the main thought of this scheme is by optimizing the bending rigidity that the section of beam shape improves beam, reduce the deflection of beam distortion, thereby guarantees that retaining refers to parallel with mould, improved operating accuracy, also saved the machine tool calibration time simultaneously.

Realize above-mentioned purpose to have behind the improved bender bender architecture advances technical scheme of backgauge crossbeam as follows:

Bender with the back backgauge crossbeam that improves structure comprises frame, crossbeam, counterdie, patrix and back stock stop, and described back stock stop comprises mainly that crossbeam, " U " shape piece, retaining refer to, leading screw, polished rod, slide block and drive link.Weld the U-shaped piece of an equal length in the bottom of described crossbeam, make the box-shaped of the cross section of crossbeam for sealing; Its cross section top is rectangle, and the bottom is the U font; And the outside, both sides, junction, top of the bottom of crossbeam and U-shaped piece is step-like, and the rectangle width on its cross section top is greater than the U-shaped piece width of bottom, and the rectangle height on top is less than the U-shaped tile height of bottom.

The cross-sectional width of described crossbeam is 100 millimeters, and bottom U-shaped piece width is 80 millimeters; The cross-sectional height of crossbeam is 20 millimeters, and bottom U-shaped depth of beam is 50 millimeters, and the wall thickness of bottom U-shaped beam is 10 millimeters.In the bending process, when cutter is pressed to plate in the process of bed die, plate will produce in the bending position upholds distortion, and back stock stop is upheld when being out of shape at the restriction plate, will bear very big active force, and refers to be delivered on the crossbeam 6 by each retaining.The general sheet material that approaches that adopts of backgauge crossbeam behind traditional bender, its bending strength and bending rigidity are not strong, use the back yielding for a long time at lathe, are difficult for repairing, and be inaccurate when causing retaining to refer to move on crossbeam, thereby cause the bending workpieces precision inaccurate.Given this, the utility model is " U " shape piece 7 isometric with it in welding below the former thin crossbeam 6, has constituted a kind of hollow box-girder.

As Fig. 3, box-girder is being subjected to will producing flexural deformation under the concentrated force F effect.Deflection can be expressed as:

$\mathrm{\ω}=\frac{-\mathrm{Fbx}(l^2-x^2-b^2)}{6\mathrm{EIl}}(0\≤x\≤a)$

$\mathrm{\&omega;}=\frac{-\mathrm{<figure-callout\; id="6"\; label="Fb"\; filenames="HSA00000313755900011.png,HSA00000313755900021.png"\; state="\{\{state\}\}">Fb</figure-callout>}}{6\mathrm{EIl}}[\frac{l}{b}{(x-a)}^3+(l^2-b^2)x-x^3](a\&le;x\&le;l);$

In the formula, F is the concentrated force that crossbeam 6 is subjected to, E is the elastic modelling quantity of material, ω is an amount of deflection, l is the span of crossbeam, and a is the distance of stress action spot to crossbeam 6 left ends, and b is the distance of stress action spot to crossbeam 6 right-hand members, x is the abscissa in crossbeam 6 arbitrary cross sections, and I is the moment of inertia of box-girder cross section to neutral axis Z.(make I ₁Be the moment of inertia of crossbeam 6 cross sections to neutral axis Z, I ₂Be the moment of inertia of " U " shape piece 7 cross sections to neutral axis Z) before not welding " U " shape piece 7 below the crossbeam 6, I=I ₁" U " shape piece 7 isometric with it gone up in the below of crossbeam 6 welding now, increased the sectional area of crossbeam 6, makes it become box-girder, then I=I ₁+ I ₂Under the situation that does not change back backgauge frame for movement, F, E, l, a, b can see constant as in the formula, by welding " U " shape piece 7 isometric below the crossbeam 6 with it, increased the cross sectional moment of inertia of crossbeam 6, reduced the flexural deformation of crossbeam 6, thereby guaranteed that retaining refers to the accuracy of moving on crossbeam, also just guaranteed the precision of workpiece bending.

The beneficial effects of the utility model are: under the situation of the frame for movement that does not change the back stock stop, " U " shape piece isometric in welding below the crossbeam 6 with it, increased the cross sectional moment of inertia of crossbeam 6, reduced the flexural deformation of crossbeam 6, thereby guaranteed to keep off the depth of parallelism that refers to mould, also just guaranteed the precision of workpiece bending.

Description of drawings

Fig. 1 is the bender structural representation,

Fig. 2 is the structural representation of back stock stop,

Fig. 3 is box-girder force diagram (annotate: the power simplification that crossbeam is subjected to is treated to concentrated force F),

Fig. 4 is the box-girder sectional view.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is further described by embodiment.

Embodiment 1:

Referring to Fig. 1, Fig. 2 and Fig. 4, bender with the back backgauge crossbeam that improves structure, comprise frame, crossbeam, counterdie, patrix and back stock stop, wherein the back stock stop comprise mainly that crossbeam 6, " U " shape piece 7, retaining refer to 4, leading screw 2, polished rod 1, slide block 3 and drive link 5.The U-shaped piece 7 of an equal length is welded in bottom at existing crossbeam 6, makes the box-shaped of the cross section of crossbeam for sealing; Its cross section top is rectangle, and the bottom is the U font; The outside, both sides, junction, top of the bottom of crossbeam 6 and U-shaped piece 7 is step-like, and the rectangle width on its cross section top is greater than the U font width of bottom, and the rectangle height on top is less than the U font height of bottom.

The cross-sectional width of crossbeam 6 is 100 millimeters, and bottom U-shaped beam width is 80 millimeters; The cross-sectional height of crossbeam 6 is 20 millimeters, and bottom U-shaped depth of beam is 50 millimeters, and the wall thickness of bottom U-shaped beam is 10 millimeters.

Fig. 3 is the stressed schematic diagram of box-girder, and crossbeam is under the effect that is subjected to concentrated force F, and flexural deformation is:

$\mathrm{\&omega;}=\frac{-\mathrm{Fbx}(l^2-x^2-b^2)}{6\mathrm{EIl}}(0\&le;x\&le;a)$

$\mathrm{\&omega;}=\frac{-\mathrm{<figure-callout\; id="6"\; label="Fb"\; filenames="HSA00000313755900011.png,HSA00000313755900021.png"\; state="\{\{state\}\}">Fb</figure-callout>}}{6\mathrm{EIl}}[\frac{l}{b}{(x-a)}^3+(l^2-b^2)x-x^3](a\&le;x\&le;l);$

As seen from Figure 3, before crossbeam 6 does not weld " U " shape piece,

Behind " U " shape piece in the welding under the crossbeam 6,

$I=I_1+{\mathrm{<figure-callout\; id="2"\; label="I"\; filenames="HSA00000313755900011.png,HSA00000313755900012.png"\; state="\{\{state\}\}">I</figure-callout>}}_2=\frac{0.02\&times;{0.1}^3}{12}+\frac{0.05\&times;{0.08}^3-0.04\&times;{0.06}^3}{12}=3.1\&times;{10}^{-6};$ With concrete size substitution following formula (make F=1000N, l=1000mm, a=200mm, b=800mm, x=100mm, E=210GPa), ω ₁=1.3 * 10 ^-5M, ω ₂=0.7 * 10 ^-5m

Can find out by the aforementioned calculation result, by welding " U " shape piece 7 isometric below the crossbeam 6 with it, increased the cross sectional moment of inertia of crossbeam 6, reduced the flexural deformation of crossbeam 6, thereby guaranteed that retaining refers to the accuracy of moving on crossbeam, also just guaranteed the precision of workpiece bending.

Claims (2)

1. the bender that has the back backgauge crossbeam that improves structure, comprise frame, crossbeam, counterdie, patrix and back stock stop, described back stock stop comprises mainly that crossbeam, " U " shape piece, retaining refer to, leading screw, polished rod, slide block and drive link, it is characterized in that: weld the U-shaped piece of an equal length in the bottom of described crossbeam, make the box-shaped of the cross section of crossbeam for sealing; Its cross section top is rectangle, and the bottom is the U font; And the outside, both sides, junction, top of the bottom of crossbeam and U-shaped piece is step-like, and the rectangle width on its cross section top is greater than the U-shaped piece width of bottom, and the rectangle height on top is less than the U-shaped tile height of bottom.

2. the bender with the back backgauge crossbeam that improves structure according to claim 1, it is characterized in that: the cross-sectional width of described crossbeam is 100 millimeters, bottom U-shaped piece width is 80 millimeters; The cross-sectional height of crossbeam is 20 millimeters, and bottom U-shaped tile height is 50 millimeters, and the wall thickness of bottom U-shaped piece is 10 millimeters.

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