CN201094967Y

CN201094967Y - Eccentric bushing packing sheet

Info

Publication number: CN201094967Y
Application number: CNU2007200689791U
Authority: CN
Inventors: 糜正忠; 李皓
Original assignee: Baoshan Iron and Steel Co Ltd
Current assignee: Baoshan Iron and Steel Co Ltd
Priority date: 2007-04-16
Filing date: 2007-04-16
Publication date: 2008-08-06
Anticipated expiration: 2017-04-16

Abstract

The utility model relates to an eccentric sleeve shim for a wire rod mill roller box, which consists of hook type elements at the two ends and a shim body; the connecting ends of the shim body and the hook elements are shaped like a hook. The eccentric sleeve shim of the utility model can quickly and timely eliminate abrasion loss by replacing the eccentric sleeve shim and restore the axial positioning accuracy of the eccentric sleeve, so as to ensure the size accuracy of rolling elements and extend the service life of the eccentric sleeve.

Description

The eccentric bushing pad

Technical field

The utility model relates to a kind of rod-rolling mill roller case eccentric bushing, particularly a kind of rod-rolling mill roller case eccentric bushing pad.

Background technology

Eccentric bushing is the strength member of rod-rolling mill roller case, and it is shaped as cylindric, and endoporus and cylindrical have certain offset.Roll shaft, filmatic bearing etc. are settled within it, realize the axial location of roll shaft and the radially adjustment of eccentric bushing rotation realization roll shaft etc.

Fig. 1 is the schematic diagram of eccentric bushing, and Fig. 2 is the A-A cutaway view of Fig. 1.As shown in the figure, eccentric bushing 1 is provided with eccentric bushing groove 11, and eccentric bushing groove 11 is used for axial location.Fig. 3 is used for the schematic diagram of axial location for the eccentric bushing groove, as shown in the figure, the groove surface of eccentric bushing groove 11 contacts with axial location pin 2, eccentric bushing need rotate when radially adjusted by axial load and roll shaft owing to groove surface in actual use, and its groove surface produces friction with the axial location pin 2 that inserts wherein.Because these two factors, the eccentric bushing groove surface will produce local micro-crimp and a certain amount of wearing and tearing in use for some time, this will cause two roll shafts axially to require contour precision to wander away, and then cause the axial dislocation of the collars groove that is installed in roll shaft head place, the axial dislocation of two collars grooves will influence the dimensional accuracy of rolled piece, the serious workpiece measurement that will cause exceeds standard, and produces waster.

Summary of the invention

For addressing the above problem, the utility model provides a kind of eccentric bushing pad, be installed between eccentric bushing groove and the axial location pin, effectively control the wear extent of eccentric bushing groove surface, thereby control the axial magnitude of misalignment of collars groove, guarantee the rolling dimensional accuracy of rolled piece, eccentric bushing is prolonged service life.

For achieving the above object, eccentric bushing pad of the present utility model is made of the hook spare 31 and the pad main part 33 at two ends, and described pad main part 33 is a hook with the link of hook spare 31.

Described hook spare 31 is provided with aperture 32, fixedlys connected with eccentric bushing groove 11 by the mode of inferior acnode weldering at aperture 32 places.

The use of eccentric bushing pad of the present utility model can in time be eliminated wear extent by changing the eccentric bushing pad apace, recovers eccentric bushing to positioning accuracy, thereby guarantees the dimensional accuracy of rolled piece; Next makes originally because of the wearing and tearing eccentric bushing that need the scrap use by this eccentric bushing pad that exceeds standard realizes that not only precision recovers, and is multiplied service life.

Description of drawings

Fig. 1 is for being the schematic diagram of eccentric bushing;

Fig. 2 is for being the A-A cutaway view of Fig. 1;

Fig. 3 is used for the schematic diagram of axial location for the eccentric bushing groove;

Fig. 4 is an eccentric bushing pad schematic diagram;

Fig. 5 is installed in the interior schematic diagram of eccentric bushing for the eccentric bushing pad.

The specific embodiment

Fig. 4 is an eccentric bushing pad schematic diagram, and eccentric bushing pad 3 is divided into three sections, is made of the hook spare 31 and the pad main part 33 at two ends, and the two ends of pad main part 33 also are designed to the hook that cooperates with hook spare 31.

Owing to be difficult to the screw that processing is used for fixing pad in the eccentric bushing groove 11, the hook spare 31 at pad two ends is provided with aperture 32, fixedly connected with eccentric bushing groove 11 by the mode of inferior acnode weldering at aperture 32 places, pad main part 33 just can not guaranteed the pad precision because of welding produces thermal deformation like this.

Hook-shaped design mode between three sections on the eccentric bushing pad, the segment that pad main part in the middle of making is fixed by both sides at the freedom of movement of radial direction retrains, can not move in radial direction, satisfy and install and use status requirement, as shown in Figure 5, Fig. 5 is installed in the interior schematic diagram of eccentric bushing for the eccentric bushing pad.Be to guarantee that the eccentric bushing pad installs the size of back eccentric bushing groove, with the stressed wear surface processing of eccentric bushing groove place to go certain thickness, minimum is 4mm, this thickness should with the consistency of thickness of eccentric bushing pad.The depth of parallelism of this machined surface and groove upper surface is controlled in the 0.01mm accuracy rating.When the eccentric bushing pad is installed and eccentric bushing groove convex surface be close to, pad center and eccentric bushing groove center overlap.

When eccentric bushing pad wearing and tearing exceed control criterion and need change, the hook spare at two ends need not be removed, as long as will move up vertically at the pad main part of efficient working range section, the hook spare of throwing off two ends can take out, change to new pad main part, the realization pad is changed the requirement that recovers precision fast.

The profile of eccentric bushing pad of the present utility model adopts the line cutting processing, and the top and bottom grinding is to size and required precision, and material selection 35GrMo, heat treatment hardness are HRC40～45.

Claims

1. an eccentric bushing pad is characterized in that, by the hook spare (31) and pad main part (33) formation at two ends, described pad main part (33) is a hook with the link of hook spare (31).

2. eccentric bushing pad as claimed in claim 1 is characterized in that, described hook spare (31) is provided with aperture (32), locates to fixedly connected with eccentric bushing groove (11) by the mode of inferior acnode weldering at aperture (32).

3. eccentric bushing pad as claimed in claim 1 is characterized in that, the profile of eccentric bushing pad adopts the line cutting processing, and material is 35GrMo, and heat treatment hardness is HRC40～45.