CN214024536U

CN214024536U - Supporting assembly for large-scale rotary worktable

Info

Publication number: CN214024536U
Application number: CN202022820576.6U
Authority: CN
Inventors: 牟杏华; 欧扬; 黄浩春
Original assignee: Changzhou Tianshan Heavy Industry Machinery Co ltd
Current assignee: Changzhou Tianshan Heavy Industry Machinery Co ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-08-24
Anticipated expiration: 2030-11-30

Abstract

The utility model belongs to the technical field of the machining technique and specifically relates to a supporting component for large-scale rotary worktable, multiunit supporting component evenly distributed is around rotary worktable, supporting component's top is equipped with the support rolls, and rotary worktable's bottom detachably is fixed with the guide rail, the guide rail is formed by the concatenation of a plurality of oblique angle concatenation pieces, the guide surface of guide rail contacts with the surface of the outer lane of support rolls, the utility model discloses can be to the problem of bearing easy cracking among the solution prior art.

Description

Supporting assembly for large-scale rotary worktable

Technical Field

The utility model relates to a machinery processing technology field, concrete field is a supporting component for large-scale rotary worktable.

Background

When hobbing is carried out, a large rotary table (with the diameter of 7000mm) can be adopted when a large gear with the diameter of seven-eight meters or more and the weight of more than 40 tons is used, the large rotary table vibrates greatly when parts are machined, the stability is poor, the cutting speed is greatly reduced, the precision is difficult to guarantee, and in order to avoid the defects of large vibration, poor stability and the like, a plurality of bearings are adopted for auxiliary support on the periphery of the working table, so that the bearing capacity of a machine tool is improved.

The original GLEASON PFUATER machine tool is designed by adopting 8 FAG 21319-E1-TVPB self-aligning roller bearings to support an integrated rotary worktable with a guide rail, and the surface hardness of the guide rail is HB 350-400.

In practical use, there are the following problems:

1. the bearing can only bear tangential force and radial force, cannot bear torsional force generated when rotating around the rotating center of the working table of the hobbing machine, and the outer ring of the bearing is often cracked;

2. the hardness of the guide rail is low, and the guide rail is seriously abraded under the conditions of continuous cutting force and heavy load, so that the machining precision of a machine tool is reduced; the guide rail is seriously abraded and needs to be continuously repaired, and the service life of the rotary worktable is continuously reduced along with the increase of the repairing times of the guide rail.

3. The rotary worktable cannot rotate due to bearing cracking, so that a cutter is gnawed during gear hobbing, and a serious quality problem is caused; and shutdown maintenance seriously affects the production progress.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a supporting component for large-scale rotary worktable to solve the problem that the bearing is easy to split among the prior art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a supporting component for large-scale rotary worktable, multiunit supporting component evenly distributed is around rotary worktable, supporting component's top is equipped with the supporting roller, and rotary worktable's bottom detachably is fixed with the guide rail, the guide rail is formed by the concatenation of a plurality of oblique angle splice blocks, the surface of guide rail contacts with the surface of the outer lane of supporting roller.

Preferably, the type of the support roller is NNTR90 × 220 × 100.2ZL, the outer surface of the outer ring of the support roller is a convex spherical surface, and the width of the contact surface between the support roller and the guide rail is 100 mm.

Preferably, the bottom of the rotary worktable is provided with an annular groove, and the oblique angle splicing blocks spliced into the guide rail are fixed in the annular groove through bolts.

Preferably, the bevel splicing blocks are made of 45 steel materials through ultrasonic frequency quenching.

Preferably, 6-10 support assemblies are arranged around the rotary table.

Preferably, the supporting rollers are arranged on the roller mounting seats, the roller mounting seats are arranged at the top of the supporting body, and adjusting washers for adjusting the heights of the supporting rollers are arranged between the roller mounting seats and the supporting body.

Preferably, the rotary worktable is provided with an alignment device for aligning the top jump of the supporting roller, the alignment device comprises a long gauge stand and a dial indicator, the long gauge stand is detachably mounted on the rotary worktable, and the dial indicator is mounted at the top end of the long gauge stand.

Compared with the prior art, the beneficial effects of the utility model are that: selecting a support roller, specifically, adopting a support roller with the model number of NNTR90 220 100.2ZL, wherein the bearing can bear very heavy radial load, and the running surface of the outer ring of the bearing is a convex spherical surface, is thicker than the outer ring of the conventional bearing of the original model number, and bears larger radial load; meanwhile, the width of the contact surface between the bearing and the guide rail is increased from the original 90mm to 100mm, so that the bearing can bear larger load; in order to ensure that the plane jump error of the rotary worktable is less than 0.03mm, the height of the supporting assembly is designed into an adjustable structure, the height of the highest point of the bearing is ensured to be consistent, a gap between the guide rail and the bearing is eliminated, the impact is reduced, the cracking risk of the bearing is reduced, and the problem of rail abrasion caused by the impact force is avoided; a special tool for detecting the height of the bearing is arranged and used for detecting and adjusting the rotation precision of the workbench; the guide rail adopts big oblique angle concatenation type, reduces the direct impact force that leads to with the bearing contact of seam, and the guide rail adopts super audio frequency surface hardening, improves guide rail surface hardness, promotes the wearability.

Drawings

Fig. 1 is a schematic view of a partial structure of the present invention;

FIG. 2 is a schematic view of the structure of the present invention in a front view;

fig. 3 is a schematic structural view of the alignment device of the present invention;

fig. 4 is a schematic structural view of the middle guide rail of the present invention.

In the figure: the device comprises a support roller 1, a guide rail 2, a bevel splicing block 21, an alignment device 3 and an adjusting washer 4.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: a support assembly for a large rotary worktable has a plurality of groups, generally 6-10 groups, 8 groups in this embodiment, the support assemblies are uniformly distributed around the rotary worktable, a support roller 1 is arranged at the top of the support assembly, a guide rail 2 is detachably fixed at the bottom of the rotary worktable, the guide rail 2 is formed by splicing a plurality of oblique angle splicing blocks 21, the guide surface of the guide rail 2 is contacted with the outer surface of the outer ring of the support roller 1, the support roller 1 is a roller with the model NNTR90 220 ZL 100.2 in this embodiment, the bearing can bear very heavy radial load, loose-fit flanges at two sides of an inner ring provide axial guide for the outer ring through the roller groups, so that a cylindrical roller bearing can bear relatively heavy torsional moment under the condition of oblique or deflection operation, the operation surface of the outer ring of the bearing is a convex spherical surface, the bearing outer ring is thicker than the conventional bearing outer ring of the prototype number, and the borne radial load is larger; meanwhile, the width of the contact surface between the bearing and the guide rail 2 is increased from the original 90mm to 100mm, and the bearable load is larger. Further, in this embodiment, 2 detachable of guide rail fix in the rotary worktable bottom, just so carried out the components of a whole that can function independently design guide rail 2 and rotary worktable, can maintain alone or change guide rail 2 when guide rail 2 damages, need not change rotary worktable, and economy is better, adopts big oblique angle concatenation type in addition, can reduce the direct impact force that leads to with the bearing contact of seam.

Preferably, the bottom of the rotary worktable is provided with an annular groove, and the oblique angle splicing blocks 21 spliced into the guide rail 2 are fixed in the annular groove through bolts.

Preferably, this application has also carried out hardening treatment to guide rail 2, and every oblique angle splice piece 21 all adopts 45 steel material ultrasonic frequency to quench and makes, and specifically, guide rail 2 is the flat plate design, in order to reach the high rigidity that is close to the bearing surface and control flat plate heat treatment deformation the most difficult problem of solving simultaneously. Comparing with various heat treatment modes such as quenching and tempering, carburizing and quenching, surface quenching and the like, the optimal scheme is comprehensively considered from the deformation, the surface hardness and the depth of a hardened layer after heat treatment. The ultrasonic quenching is between high frequency and medium frequency, the depth of layer is relatively deep, the hardness is relatively high, and the deformation of surface quenching is relatively controllable. The hardness after actual surface quenching is above 60HRC, then the final deformation can be controlled within 0.3mm by correcting deformation through a press, the hardness of finished products after plane grinding is above 58HRC and close to the surface hardness of the bearing, and the hardness is uniform after processing. The problem of the heat treatment deformation of the guide rail 2 can be controlled on the premise of improving the surface hardness is solved. The high hardness of the guide rail 2 ensures that the surface roughness and the flatness of the guide rail 2 are better, and the impact force can be reduced to the minimum by matching with lubricating grease in the running process of the bearing.

Preferably, the supporting roller 1 is installed on the roller installation seat, the roller installation seat is installed at the top of the supporting body, an adjusting gasket 4 for adjusting the height of the supporting roller 1 is arranged between the roller installation seat and the supporting body, the plane jump error of the rotary workbench can be guaranteed to be less than 0.03mm, meanwhile, the rotary workbench is provided with an alignment device 3 for aligning the top jump of the supporting roller 1, the alignment device 3 comprises a dial gauge stand and a dial indicator, the dial gauge stand is detachably installed on the rotary workbench, the dial indicator is installed at the top of the dial gauge stand, the alignment device 3 is matched with the adjusting gasket 4, the top jump of 8 supporting components can be aligned, the correction is convenient, the highest point height of the bearing is guaranteed to be consistent, the gap between the guide rail 2 and the bearing is eliminated, the impact is reduced, the bearing cracking risk is reduced, and the problem of rail abrasion caused by the impact force is avoided.

The supporting assembly solves the problems of bearing cracking, guide rail 2 abrasion and large impact force between the bearing and the guide rail 2, and when the supporting assembly is applied to a large-scale gear hobbing machine for machining an ultra-large gear ring, the stability and the precision of a machine tool can be greatly improved due to the increase of bearing capacity, the reduction of impact force and the increase of wear resistance, the service life of the machine tool is prolonged, and the precision grade of a product is improved; the hob can bear continuous high-speed cutting under the condition of heavy load, so that the processing efficiency is improved; meanwhile, the product quality problem caused by bearing cracking and the economic loss caused by shutdown and maintenance are avoided. The rotary supporting assembly can be used for various large-scale auxiliary rotary working tables, particularly solves the problem of poor stability of the rotary working table when heavy-load high-precision parts are machined, and improves machining efficiency and product precision.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a supporting component for large-scale rotary worktable, multiunit supporting component evenly distributed is around rotary worktable, its characterized in that: the top of supporting component is equipped with supporting roller (1), and rotary worktable's bottom detachably is fixed with guide rail (2), guide rail (2) are formed by a plurality of oblique angle splice pieces (21) concatenation, the surface of guide rail (2) contacts with the surface of the outer lane of supporting roller (1).

2. A support assembly for a large rotary table according to claim 1 wherein: the type of the supporting roller (1) is NNTR90 220 100.2ZL, the outer surface of the outer ring of the supporting roller (1) is a convex spherical surface, and the width of the contact surface of the supporting roller (1) and the guide rail (2) is 100 mm.

3. A support assembly for a large rotary table according to claim 1 wherein: the bottom of the rotary worktable is provided with an annular groove, and oblique angle splicing blocks (21) spliced into the guide rail (2) are fixed in the annular groove through bolts.

4. A support assembly for a large rotary table according to claim 1 wherein: the bevel splicing blocks (21) are made of 45 steel materials through ultrasonic frequency quenching.

5. A support assembly for a large rotary table according to claim 1 wherein: 6-10 support assemblies are arranged around the rotary worktable.

6. A support assembly for a large rotary table according to claim 1 wherein: the supporting roller (1) is installed on the roller installation seat, the roller installation seat is installed at the top of the supporting body, and an adjusting washer (4) used for adjusting the height of the supporting roller (1) is arranged between the roller installation seat and the supporting body.

7. A support assembly for a large rotary table according to claim 1 wherein: have alignment supporting roller (1) top alignment device (3) of beating on the swivel work head, alignment device (3) are including long table frame and percentage table, long table frame detachably installs on the swivel work head, the top at long table frame is installed to the percentage table.