Flexible skew rolling mill with dual-rotatable-shafts

Patent metadata

Field	Value
Publication number	US-11612919-B2
Application number	US-202016906729-A
Country	US
Kind code	B2
Filing date	Jun 19, 2020
Priority date	Jun 20, 2019
Publication date	Mar 28, 2023
Grant date	Mar 28, 2023

Abstract

Metal plastic forming processes and equipment that provides a flexible skew rolling mill with dual-rotatable-shafts, including a base unit, a guide unit, two rollers, two servo main-shaft systems, a roller distance adjusting mechanism, two tilt angle adjusting mechanisms, a cooling system and a numerical control system. The two servo main-shaft systems are mounted under the support of the two beds, thereby driving the two rollers to do rotation motion; the roller distance adjusting mechanism drives the two beds, thereby enabling the two rollers to do synchronous centering and radial feed motion; the two tilt angle adjusting mechanisms drive the servo main-shaft systems respectively to rotate around a horizontal rolling center line and enable the two rollers to do tilt angle adjustment motion; and the numerical control system controls a rotating speed, radial feed and tilt angle adjustment of the two rollers, such that skew rolling mills and rollers of the same dimensions and specification can form shaft parts of different dimensions and specifications by flexible skew rolling. The flexible skew rolling mill with dual-rotatable-shafts has the advantages that the beds are synchronously centered and radial feed, the strength of the beds is high, the mounting and debugging are convenient, flexible production can be realized and the like such that the flexible skew rolling mill has broad prospects of being applied to the field of forming large-diameter shaft parts with diversified specifications.

First claim

What is claimed is:

1. A flexible skew rolling mill with dual-rotatable-shafts, comprising:
a base unit;
a guide unit;
two rollers;
two servo main-shaft systems;
a roller distance adjusting mechanism; and
two tilt angle adjusting mechanisms and a numerical control system,
the two rollers can do roller rotation motion that rotate around the axes of the rollers, linear motion in a radial direction of a billet and tilt angle adjustment motion for adjusting angles between the axes of the rollers and an axis of the billet;
the guide unit is configured to limit the rotation of the billet between the two rollers for preventing swing of the billet;
the two servo main-shaft systems are configured to drive the two rollers to rotate around the axes of the rollers;
the roller distance adjusting mechanism is configured to drive the two rollers to do linear motion in the radial direction of the billet, and the roller distance adjusting mechanism comprises a linear cylinder;
the two tilt angle adjusting mechanisms are configured to drive the two rollers to adjust the included angles between the axes of the rollers and the axis of the billet;
the numerical control system is configured to control the two servo main-shaft systems, the roller distance adjusting mechanism and the two tilt angle adjusting mechanisms; and
the base unit is configured to mount the flexible skew rolling mill;

wherein the two servo main-shaft systems, the roller distance adjusting mechanism and the two tilt angle adjusting mechanisms are all disposed on beds;
the two beds are symmetrically arranged with the axis of the billet as the center, each of the beds is supported by a bed rotatable shaft, and the beds are capable of rotating around the bed rotatable shafts;
holes for mounting the rotatable shafts are formed in the lower ends of the beds, holes for mounting the two servo main-shaft systems are formed in the middle of the beds, holes for mounting the roller distance adjusting mechanism are formed in the upper ends of the beds, and holes for mounting worms of the tilt angle adjusting mechanisms are formed in the rear ends of the beds.

2. The flexible skew rolling mill with dual-rotatable-shafts according to claim 1 , wherein the lower parts of the two beds are provided with gear synchronizing mechanisms which are two gears/gear sets and are respectively disposed at the end parts of the two bed rotatable shafts; the two gears/gear sets are externally engaged with each other, and when the two gears/gear sets are engaged to rotate, the two beds are driven to do opposite-direction rotation at the same speed around the rotatable shafts.

3. The flexible skew rolling mill with dual-rotatable-shafts according to claim 2 , wherein the roller distance adjusting mechanism further comprises two cylinder block seats;
the linear cylinder is mounted on the two cylinder block seats, and the two cylinder block seats are respectively fixed at the upper parts of the two beds in the manner that locking nuts pass through the holes for mounting the roller distance adjusting mechanism; and
the linear cylinder is a hydraulic cylinder or an electric cylinder; and
the linear cylinder drives the two cylinder block seats to do linear motion, thereby driving the two beds to rotate around the respective bed rotatable shafts so as to enable the two rollers to do opposite-direction radial linear motion at the same speed.

4. The flexible skew rolling mill with dual-rotatable-shafts according to claim 1 , wherein the two servo main-shaft systems comprise two sets of same components, and each set of components comprises a main shaft, a servo main motor, a decelerator and a main-shaft bearing seat;
the two main shafts are symmetrically arranged with the axis of the billet as the center; the rollers are mounted on the main shafts, the main shafts are supported on the main-shaft bearing seats, and the main-shaft bearing seats are supported on the beds, and are fit-mounted at the middle of the beds by virtue of the holes for mounting the main-shaft systems; and
the two servo main motors respectively drive the two main shafts to rotate by virtue of the decelerators, thus driving the two rollers to do same-direction rotation motion.

5. The flexible skew rolling mill with dual-rotatable-shafts according to claim 1 , wherein the two tilt angle adjusting mechanisms comprise two sets of same components, and each set of component comprises a tilt angle adjusting motor, a worm wheel and a worm;
the two worms are fixedly mounted at the rear sides of the two beds respectively by virtue of the holes for mounting the worms, and the two worm wheels are fixedly mounted at the sides, close to the worms, of the two main-shaft bearing seats respectively by virtue of bolts; and
the tilt angle adjusting motors drive the worms to rotate, thereby enabling the worms to transfer the motion to the worm wheels, so as to drive, by the worm wheels, the two servo main-shaft systems to perform interlaced rotation around a horizontal rolling center line, and enable the two rollers to do opposite-direction tilt angle adjustment motion.

6. The flexible skew rolling mill with dual-rotatable-shafts according to claim 1 , wherein the base unit comprises a fixing frame, a base, a bed rotatable shaft seat and a bed rotatable shaft cover; the fixing frame is mounted on a foundation, the base is fixedly mounted on the fixing frame, the bed rotatable shaft seat is fixedly mounted on the base, the bed rotatable shaft cover is fixed on the bed rotatable shaft seat by virtue of a thread, the bed rotatable shaft seat and the bed rotatable shaft cover are upper and lower split seats of the bed rotatable shafts, and the holes for mounting the bed rotatable shafts are provided in the bed rotatable shaft seat and the bed rotatable shaft cover with the axis of the billet as a symmetry center.

7. The flexible skew rolling mill with dual-rotatable-shafts according to claim 6 , wherein the guide unit comprises a feeding guide cylinder, a middle guide plate and a discharging guide cylinder;
the feeding guide cylinder is fixedly mounted at the front of the upper side of the bed rotatable shaft cover, the middle guide plate is fixedly mounted at the middle of the upper side of the bed rotatable shaft cover, and the discharging guide cylinder is fixedly mounted at the rear of the upper side of the bed rotatable shaft cover; and the axis of the billet coincides with the axes of the feeding guide cylinder and the discharging guide cylinder.

8. The flexible skew rolling mill with dual-rotatable-shafts according to claim 6 , wherein the flexible skew rolling mill with dual-rotatable-shafts further comprises a cooling system;
the cooling system comprises a cooling liquid spraying tube, a liquid baffle, a liquid discharging tube and a liquid storage tank; the cooling liquid spraying tube sprays liquid to the two rollers, the liquid baffle is fixedly mounted on the base to prevent the cooling liquid from spilling over; the liquid discharging tube is fixedly mounted under the base to discharge the cooling liquid; and
the water tank is arranged within the fixing frame for storing the cooling liquid.

9. The flexible skew rolling mill with dual-rotatable-shafts according to claim 6 , wherein the numerical control system comprises a control cabinet component and a screen display component; the control cabinet component is fixedly mounted within the fixing frame, and the screen display component is mounted at the front side of the right one of the two beds.

Assignees

• Univ Beijing Science & Technology

Inventors

• Wang Baoyu
• Lin Longfei
• Wang Shuai
• Yang Cuiping
• Liu Shengqiang
• Zhang Huibo

Classifications

• B21B35/00

  Drives for metal-rolling mills {, e.g. hydraulic drives} · CPC title

• B21B31/185

  and by crossing rolls · CPC title

• B21B27/10

  externally · CPC title

• B21B31/22

  mechanically {, e.g. by thrust blocks, inserts for removal} · CPC title

• B21B35/14

  Couplings, driving spindles, or spindle carriers specially adapted for, or specially arranged in, metal-rolling mills (couplings or shafts in general F16) · CPC title