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Crowning Table ——The Secret of Higher Bending Accuracy
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Crowning Table ——The Secret of Higher Bending Accuracy

Views: 123     Author: Site Editor     Publish Time: 2021-08-17      Origin: Site Inquire

Crowning Method Classification


In order to eliminate the adverse effects of slider deformation, the deflection deformation of the slider needs to be compensated. The usual Crowning method is divided into mechanical Crowning and hydraulic Crowning.


Table hydraulic automatic deflection Crowning mechanism, which is composed of a set of cylinders installed in the lower table, the position and size of each Crowning cylinder is designed according to the slider, table finite element analysis of the deflection Crowning curve, hydraulic Crowning is through the relative displacement between the front, middle and back of the three vertical plates to achieve the neutral version of the bump Crowning, the principle is through the elastic deformation of the steel plate itself to achieve the bump, so its Crowning The amount of Crowning can be adjusted within the elastic range of the table.

Mechanical Crowning

hydraulic crowning

The mechanical Crowning table is composed of a set of convex inclined wedges with bevels, and each convex wedge is designed according to the deflection curve of the slider and table FEA. The CNC system calculates the required Crowning amount according to the magnitude of the load force (which will cause deflection deformation of the slider and table plate) during bending, and automatically controls the relative movement of the raised wedges to effectively compensate for the deflection deformation of the slider and table plate, thus obtaining the ideal mechanical deflection Crowning for the bent workpiece by controlling the position of the "pre-bumping ", by a set of wedges in the table length direction to form a curve with the actual deflection, so that the gap between the upper and lower tooling in the bending consistent, to ensure that the bending workpiece in the length direction of the same angle.

Mechanical Crowning

Mechanical Crowning

Mechanical Crowning Classification


According to the control mode, it can be divided into electric Crowning and manual Crowning. Electric Crowning through the system control for automatic Crowning; manual Crowning through manual adjustment Crowning.

Mechanical Crowning

Mechanical Crowning

According to the direction of adjustment, it can be divided into one-way adjustment and two-way adjustment. One-way adjustment: automatic or manual adjustment in Y direction; two-way adjustment: automatic or manual adjustment in Y direction and manual adjustment in X direction.

Mechanical Crowning

Mechanical Crowning

According to the adjustment method, it can be divided into a scale nut, hand crank, and motor.

Mechanical Crowning

Mechanical Crowning

Mechanical Crowning

According to the width of the table, it can be divided into narrow type and wide type. Generally narrow type table is equipped with 1V,2V,4V concentric lower die; generally a wide type table is equipped with multi-V lower die. If you need to match 1V,2V,4V molds, you need to match the mould drag.

Mechanical Crowning

Mechanical Crowning

Parameter Introduction

Mechanical Crowning

Mechanical Crowning

B(mm) H(mm) L(mm) ΔH MAX Adjustment method
180 80 2500 1.0  Partial scale bolt fine adjustment ΔH
3200
4000
200 80 2500
3200
4000
220 80 2500
3200
4000
240 85 3200
4000
6000 1.3 
280 90 3200 1.0 
4000
6000 1.3 

Mechanical Crowning

B(mm) H(mm) L(mm) ΔH1 MAX ΔH2 MAX Adjustment method
90 95 2500 2.0  0.8 CNC electric adjustment ΔH1 + local scale bolt fine adjustment ΔH2
3200 2.0 
4000 2.0 

Mechanical Crowning

Mechanical Crowning

B(mm) H(mm) L(mm) ΔH MAX Adjustment method
180 100 2500 2.0  Hand crank adjustment ΔH
3200
4000 2.5 
200 100 2500 2.0 
3200
4000 2.5 
220 100 2500 2.0 
3200
4000 2.5 
240 100 3200 2.0 
4000 2.5 
6000 3.5 
280 100 3200 2.0 
4000 2.5 
6000 3.5 

Mechanical Crowning

Mechanical Crowning

B(mm) H(mm) L(mm) ΔH MAX Adjustment method
180 100 2500 2.0  CNC electric adjustment ΔH
3200
4000 2.5 
200 100 2500 2.0 
3200
4000 2.5 
220 100 2500 2.0 
3200
4000 2.5 
240 100 3200 2.0 
4000 2.5 
6000 3.5 
280 100 3200 2.0 
4000 2.5 
6000 3.5 

Mechanical Crowning

Mechanical Crowning

B(mm) H(mm) L(mm) ΔH1 MAX ΔH2 MAX Adjustment method
180 100 2500 2.0  1.0  CNC electric or manual adjustment ΔH1 + local scale bolt fine adjustment ΔH2
3200
4000 2.5  1.0 
200 100 2500 2.0  1.0 
3200
4000 2.5  1.0 
220 100 2500 2.0  1.0 
3200
4000 2.5  1.0 
240 100 3200 2.0  1.0 
4000 2.5  1.0 
6000 3.5  1.0 
280 100 3200 2.0  1.0 
4000 2.5  1.0 
6000 3.5  1.0 

Mechanical Crowning

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