TECHNOLOGICAL EQUIPMENT FOR PLASTIC FORMING OF A WIDE FLANGE IN PIPE BLANK

Describes the features of the design of technological equipment for plastic forming wide flanges in pipe blanks and accessories for the implementation of the technological process. Shows the dependence for determining deforming efforts. Scheme of the stamp to simulate the process of flanging and local deformation of the toroidal section in the flange are presented

D. B. Riabinine - verso

Botanico: Riabinine, D. B. Titolo manoscritto sul recto, dove compare anche la nota: dono del Pr. G. B. De Toni 1899. Montata su cartoncino 104 x 63 mm. 1 fotografia : albumina ; 92 x 54 mm. Vai alla scheda bibliografica: https://galileodiscovery.unipd.it/discovery/fulldisplay?context=L&vid=39UPD_INST:VU1&search_scope=MyInst_and_CI&tab=Everything&docid=alma99001521478020604

DETERMINATION MODES OF ROLLING BANDS OF VARIABLE THICKNESS FOR ACHIEVEMENT REQUIRED DIMENSIONAL ACCURACY OF FORMING PROFILE

The features of the process of longitudinal rolling bands of variable thickness with increasing compression are considered. The graphs of changes of instant advance when rolling with increasing compression are given. Compression modes bands of variable thickness that achieve the desired dimensional accuracy are defined. Schemes of experimental device for rolling bands of variable thickness along the length are presents

STRENGTH ANALYSIS OF BANDED ROLL FOR ASYMMETRIC ROLLING

The calculation of the nominal torque on the rolls during asymmetric rolling of a strip with small laminated springs are held. To stabilize the rolling process it is proposed to use a front tension and a certain minimum value was calculated. Misalignment of the circumferential speeds of the driving and driven rolls are calculated. The design of a composite roll banded with two tabs on the brace and the two grooves on the shaft are proposed. Crumpling test and shear test of the tabs on the brace were conducted. Necessary structural toughness was provided

INTENSIFICATION OF THE PROCESS OF SEPARATION OF THE BAR ASSORTMENT BY CROSS-SCREW ROLLING

Based on the analysis of the known methods of separation of the bar stock into cut-to-length sections, it has been found that the most effective is the process of transverse screw rolling with the preliminary application of a ring-shaped wedge-shaped groove to the bar. In order to reduce its depth, it is proposed during the rolling process to displace the separated part of the material in a plane perpendicular to the axis of the rod by the amount of plastic crushing characteristic for the stamp cutting of the assortment

DEFINITION OF CONDITIONS OF STRIP’S ROLLING IN ROLLS OF UNEQUAL DIAMETER WITH FIXING OF AN ENDING ELEMENT

The scheme of strip’s rolling with variable thickness and with a bend of a trailer site is offered. Conditions of strip’s rolling on the offered scheme at production of a brake shoe pin of railway transport are defined. Expressions for calculation of torsion torque on the leader and a permission rolls are defined. Equations for calculation of a forward tension and the pulling effort on a frame are defined

Strength analysis of banded roll for asymmetric rolling of few-leaf springs

The nominal rotational torque on the rolls during asymmetric rolling of a strip of few-leaf springs was calculated. To stabilize the rolling process it was proposed to use a front tension and a minimum value of such tension was computed. Misalignment of the circumferential speeds of the driving and driven rolls are calculated. The design of a composite banded roll with two tabs on the bandage and the two grooves on the shaft are proposed. In addition, the mating surfaces of the shaft and the shroud are made in the form of a Morse cone, which facilitates the repair of the roll and provides a tight contact between the mating surfaces. The test for bearing stress and shear of the tabs on the bandage. The structural strength of banded roll is provided

EXPERIMENTAL INVESTIGATIONS OF THE PROCESS OF ROLLING STRIPS OF VARIABLE THICKNESS WITH A LOCAL BEND

The results of computer simulation and experimental investigations of the rolling process of strip blanks on the profiled mandrel using two processing scheme