SU1433604A1 - Set of thread-rolling rollers - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used when rolling threads. The goal is to increase the accuracy of the thread and expand the technological capabilities by processing billets with large allowances. For 3 / ipro, each thread rolling roller contains smooth conical, intake and threaded cylindrical parts. Cylindrical sections are located on smooth conical parts. The diameter of each subsequent cylindrical section exceeds the diameter of the previous one. These areas are sequentially offset along the axis of each roller. Smooth conical sections of rollers come first, and then cylindrical. Due to their displacement along the axis of each roller, they ensure self-contraction of the rollers during the formation of the outer diameter of the workpiece. In this case, the blank for thread rolling can be taken with large allowances, regardless of the size of the thread being rolled. 2 hp f-ly, 3 ill. (L with

Description

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The invention relates to the processing of metals by pressure and can be used when rolling threads threads heads.

The aim of the invention is to improve the accuracy of thread rolling and the expansion of the technological capabilities of thread rolling heads.

Figures "1-3" are shown-longitudinal sections of the 1st, 2nd and n-th rollers, respectively,

The rollers in the kit are made as follows. Each video has

2

Included are the last cylindrical stage Dg of equal diameter. The first turn of the intake threaded part 2 of the knurling roller R is located at a distance of 1 from the front end of the roller. Subsequent threaded turns are located in a set, spaced apart from each other, ensuring compliance with the pitch. rolled thread R.

The work of the rollers is similar to the work of the rollers of the known set with the exception of smooth cylindrical

. stepped shchindrncheskaya 1, threads,

Bead intake 2 and threaded zipind- Rolling is carried out at a phable 3 parts. For uniform and consistent operation, the cylindrical sections of the stages 1 of all the rollers

axial feed tool. First, cylindrical steps of the rollers which are displaced in the axial direction by an offset form the workpiece under the N-frame AS, participate in shaping. Hence, the width of the thread. The last cylindrical steps on the Ij of the cylindrical sections of the rollers, for example, Dg, forks, for example, with a three-roller, form the final diameter of the packing, must be at least HRP, Diameter D; R is less than the diameter D, j of the first section of the cylindrical roller stage R by the magnitude of the unit strain. Similarly di

Di meter is the same value less than the di- 30 set of rollers). As a primer, Dg of the first section, the distric- tional: reviewer-i rollers were used to obtain the stz penn roller R, i.e. the following relationship holds:

KI under rolling thread. After that, the threaded sections of the rollers come into play. OHii 4) Mirror on the workpiece thread with the necessary napat-ieT-ramie.

Example (calculation of parameters

 trapezoidal thread 64 from a billet with a diameter of 15; 2 mm.

The diameter of the workpiece under the thread thread mm. Allowance for processing tsilivdra mm. Choose a number. the rollers in the head of the th-W, the width of the stage 1, qi: the -stry part must be next 1 l l / zP; 1,:, 3 mm,

Forcing / Colt 1s TvTtut 1eny per-40 Accept, 5 mm. The axial displacement depends on the value of the allowance for processing 1,: US-P ,, 5 i.

g .. The value of a unit strain pa

For simultaneous capture by all ° D, the stage is defined as the a-D-roller No. 1 of the workpiece 4 transition points hh ° yb - & P

conic sections into cylinders, 45 ° angled / 5 11, received 1 a

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D, k: D.cD ,. Dg,

Complying with this relationship allows the work of deformation to be distributed in successive steps and provide an axial and radial radius .14

 s

3 are located on one conical generatrix at an angle to the axis of the rollers and approximately equal to the angle {fp of the starting part of the workpiece.

2uS, 5-0, 194 mm. The number of sections of cylindrical sheath per set of rollers is determined as follows

50

one ,.

At all the steps of each of the rolled rollers in front of the smooth cylindrical section there is a conical section at an angle cpc to the axis of the rollers, about 55 ° 5 ° Defor and IRU1 layer baking the entrance of the cylindrical sections 1 into operation. To ensure that the workpiece is centered during the thread rolling process, all the rollers

The distribution of steps between sets of sets. Total five stupa

Oh, 194-5 0.970 mm. The first step D thus deforms the layer: 1.2-0,, 203 1F1. For the final shaping of the cylinder on the ne

axial feed tool. At first, cylindrical roller steps are involved in shaping, which prepare the workpiece for thread wrapping. The last cylindrical sections of the rollers, for example, Dg, form the final diameter of the pulleys.

KI under rolling thread. After that, the threaded sections of the rollers come into play. OHii 4) Mirror on the workpiece thread with the necessary napat-ieT-ramie.

Example (calculation of parameters

By setting the angle / 5 11, receive 1 a

2uS, 5-0, 194 mm. The number of sections of cylindrical sheath per set of rollers is determined as follows

50

one ,.

 -r ° 5 b Defor FOR IRUYU1 layer

The distribution of steps between the rollers of the set. Total five steps

 -r ° 5 b Defor FOR IRUYU1 layer

Oh, 194-5 0.970 mm. The first step D ,, thus, deforms the layer: 1.2-0,, 203 1 Ф1. For the final shaping of the cylinder on feather 14336

BOM and second rollers also provide cylindrical sections with a diameter of Dg. The threaded portion is calculated as usual for threading rollers with axial-type roller heads.

The set of knurling rollers makes it possible to increase the accuracy of rolling threads by reducing the axial forces, and also expands the technological capabilities of the rolling rolling tool by increasing the metal allowance for thread rolling.

Claims (1)

1. A set of thread rolling rollers, each of which contains a smooth tapered thread} of the intake and threaded cylindrical parts, is also molded. that, in order to increase thread accuracy by reducing axial forces on the smooth conical parts of each of the rollers, cylindrical sections are made, and the latter are consistently placed along the axes of each roller and the diameter of the next subsequent cylindrical section of the rollers in short. 2, Koi-clips of rollers in accordance with clause 1, about t-l and h a and y with the fact that, in order to expand technological capabilities due to rolling threads on workpieces with large allowances, smooth conical parts of the rollers are made of thick and with an additional conical section, and the transition points of the cylindrical to conical sections are placed on the generator that has a smooth skull; the threaded, intake part of each of the rollers is equal to the bore, and the width of the cylindrical parts of all stages is determined from the condition Z - the number of rollers in the kit; R - pitch of the thread being rolled, Kit according to claims. 1 and 2, that is, with the fact that the displacement of the cylinder sections of the steps US is .0- D; -D, 4, - D. - cylindrical section of the i-th stage; diameter of the cylindrical section (1 +) -th stage; ft angle of the conical generatrix, on which the junction points of the conic sections into the cylindrical ones are located. I-1 J FIG. Figz