CN200970676Y

CN200970676Y - Spring roller press device

Info

Publication number: CN200970676Y
Application number: CN 200620125423
Authority: CN
Inventors: 胡宏伟
Original assignee: CSR Tongling Rolling Stock Works
Current assignee: CRRC Yangtze Co Ltd
Priority date: 2006-11-24
Filing date: 2006-11-24
Publication date: 2007-11-07
Anticipated expiration: 2016-11-24

Abstract

The utility model discloses a flexible rolling device, a rolling wheel [2] is fixed on a front blade rod [8], a spring [9] is provided between connecting disks [10, 12] of front and rear blade rods, the connecting disks are connected through a guiding pillar [11] and locking mechanism which provides pre-tight force to the spring [9], thus when the rolling wheel [2] is pressed, the front blade rod connecting disk [10] can compress the spring [9] and make it move to the side of the rear blade rod connecting disk [12]. The pre-stress of the rolling wheel is adjustable and flexibly changeable to the change of the rolled surface shape. Surfaces of workpieces are equally pressed and processing quality is high.

Description

The elasticity rolling device

Technical field

The utility model relates to the rolling device of circular arc transition faces such as axle journal compensating groove, dustproof seat compensating groove being strengthened processing by rolling and processing.

Background technology

After the rolling stock speed-raising, the requirement of axletree on manufacturing and designing of bearing car load is more and more higher.Traditional processing and manufacturing means have been difficult to satisfy the demand of existing railway transportation.From present rolling stock operating position, especially after running velocity improves, as shown in Figure 2, more fatigue crack has appearred in axle journal compensating groove A and dustproof seat compensating groove B etc., the serious axle journal of generation cold cut great driving accidents such as (rupturing suddenly at axle journal compensating groove place owing to fatigue crack causes train axletree when moving).In order to solve above-mentioned contradiction, China all adopts the mode of mechanical stitch to strengthen finished surface (axle journal compensating groove, dustproof seat compensating groove etc.) in the design of 60t level lorry axletree.This rolling device normally is installed in rolling wheel on the knife rest of engine lathe or numerically controlled lathe by knife bar, contact with knife bar feeding and workpiece position to be processed, rotates with workpiece surface of the work is carried out finish rolling hardening.The shortcoming of the rolling device of this structure is that rolling wheel contacts with the workpiece rigidity, and the roll extrusion STRESS VARIATION during roll extrusion is big, after the roll extrusion by rolling surface distortion bigger and surperficial pressurized inhomogeneous etc., can not satisfy the manufacturing requirement of axletree.

Summary of the invention

The utility model provides a kind of elasticity rolling device, and rolling wheel contacts with workpiece is flexible, can make whole sclerosis basically identical as a result with being changed stress flexibly by the variation of rolling surface shape, improves the crudy of workpiece.

The utility model is achieved in that the elasticity rolling device, the knife bar that comprises rolling wheel and installation rolling wheel, described knife bar is made up of forward and backward knife bar two parts, rolling wheel is fixed on the preceding knife bar, be respectively equipped with terminal pad on the forward and backward knife bar, between the terminal pad of forward and backward knife bar spring is housed, the terminal pad of forward and backward knife bar connects by lead and to the retaining mechanism that spring is provided with pretightning force, when this retaining mechanism makes the rolling wheel pressurized before the knife bar terminal pad spring is compressed and knife bar terminal pad one side shifting backward.The pretightning force that changes spring by retaining mechanism can change the prestress of rolling wheel to hardened surface.Add man-hour, make rolling wheel contact by the knife rest feeding with the position to be processed of workpiece, rolling wheel is along with the rotation of workpiece is carried out the finish rolling hardening processing to surface of the work, when by the variation of rolling surface shape, by spring by corresponding compression or release and change stress flexibly, make whole sclerosis basically identical as a result, improve the crudy of workpiece.

Described retaining mechanism is formed by connecting screw rod and locking nut, have in the middle of the back knife bar and connect the through hole that screw rod cooperates, the connection screw front end by after the middle through hole of knife bar be threaded with preceding knife bar, after the rear end is fixed on by locking nut on the knife bar.The rotational lock nut is the decrement of regulating spring easily, to change the prestress of rolling wheel to hardened surface.

When the feeding of knife rest in the Y direction, along with the variation of workpiece radial dimension and surface configuration or the influence of other impacts, the stress that causes rolling wheel to be applied to the workpiece local surfaces increases sharply, thereby influences strengthening effect in process.In order to eliminate this influence, rectangle is arranged in preceding knife bar cross section of the present utility model, and its width is located at the axial of rolling wheel.Can utilize self properties of materials of knife bar, knife bar upwards also obtains certain flexibility at Y before making, when the rolling wheel adverse effect that the elastic bending by knife bar comes local stress relieving to increase sharply when Y upwards is subjected to impacting.

Advantage of the present utility model is that rolling wheel all keeps flexible with workpiece and contacts on two horizontal directions of feeding, can be with being changed stress flexibly by the variation of rolling surface shape, make that the work piece surface pressurized is even, whole sclerosis is basically identical as a result, can obtain comparatively ideal crudy.And the prestress of rolling wheel is adjustable, and the scope of application is wider.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the axle construction schematic diagram.

Among the above-mentioned figure, 1, end nut, 2, rolling wheel, 3, taper roll bearing, 4, end pad, 5, packing ring, 6, spring washer, 7, nut, 8, preceding knife bar, 9, spring, 10, terminal pad, 11, lead, 12, terminal pad, 13, the back knife bar, 14, nut, 15, locking nut, 16, connect screw rod, 17, rotating shaft, A, axle journal, B, compensating groove.

The specific embodiment

As shown in Figure 1, the front end of knife bar 8 before rolling wheel is fixed on by assembly end nut 1, taper roll bearing 3, end pad 4, packing ring 5, spring washer 6, nut 7 and rotating shaft 17, back knife bar 13 is installed on the knife rest (not shown) of lathe.The front end of the rear end of preceding knife bar 8 and back knife bar 13 is respectively equipped with

terminal pad

10,12, before, back knife bar terminal pad 10, disk spring 9 is installed between 12, the retaining mechanism that spring is provided with pretightning force is by connecting screw rod 16, nut 14 and locking nut 15 are formed, back knife bar 13 centres have and connect the through hole that screw rod cooperates, connecting screw rod 16 front ends is threaded with preceding knife bar 8 by the through hole in the middle of the back knife bar 13, the rear end is by nut 14, locking nut 15 is fixed on the knife bar 13 of back, rotational lock nut 15 can regulating spring 9 decrement, correspondingly can regulate the prestress of 2 pairs of hardened surfaces of rolling wheel.Be provided with lead 11 between the

terminal pad

10,12 of forward and backward knife bar, so that the advance and retreat of preceding knife bar at directions X are led.The cross section of preceding knife bar 8 is rectangle, and its width is located at the axial of rolling wheel 2, and knife bar upwards also has certain elasticity at Y before making.

Claims

1, the elasticity rolling device, the knife bar that comprises rolling wheel [2] and installation rolling wheel, it is characterized in that knife bar is by preceding, back knife bar [8,13] two parts are formed, rolling wheel [2] is fixed on the preceding knife bar [8], before, be respectively equipped with terminal pad [10 on the back knife bar, 12], before, the terminal pad [10 of back knife bar, spring [9] is housed 12], before, the terminal pad [10 of back knife bar, 12] connect by lead [11] and to the retaining mechanism that spring [9] is provided with pretightning force, when this retaining mechanism makes rolling wheel [2] pressurized before knife bar terminal pad [10] spring [9] is compressed and knife bar terminal pad [12] one side shiftings backward.

2, elasticity rolling device according to claim 1, it is characterized in that described retaining mechanism forms by connecting screw rod [16] and locking nut [15], back knife bar [13] centre has and connects the through hole that screw rod cooperates, connect screw rod [16] front end and be threaded with preceding knife bar [8] by the through hole in the middle of the back knife bar [13], the rear end is fixed on the back knife bar [13] by locking nut [15].

3, elasticity rolling device according to claim 1 and 2 is characterized in that the cross section of preceding knife bar [8] is rectangle, and its width is located at the axial of rolling wheel [2].