CN220479799U

CN220479799U - Roundness control device for thin-wall cylinder

Info

Publication number: CN220479799U
Application number: CN202321941770.7U
Authority: CN
Inventors: 段良辉; 丁洵; 彭小彦; 黄金华; 王璇; 王敏辉
Original assignee: Jiangnan Industries Group Co Ltd
Current assignee: Jiangnan Industries Group Co Ltd
Priority date: 2023-07-24
Filing date: 2023-07-24
Publication date: 2024-02-13
Anticipated expiration: 2033-07-24

Abstract

The utility model discloses a roundness control device of a thin-wall cylinder, which comprises a bearing bush detachably sleeved on the outer surface of the thin-wall cylinder and a conical bushing detachably sleeved on the outer side of the bearing bush, wherein the outer surface of the bearing bush and the inner surface of the conical bushing are both conical, and the bearing bush is contacted with the conical surface of the conical bushing; the parallel conical surface friction operation is utilized to enable the thin-wall cylinder body to be deformed irregularly, the split bearing bush is expanded and shaped, the whole process device is simple in structure, automatic in centering and convenient to operate, the roundness correction workload is greatly improved, the roundness of the cylindrical part with larger deformation is well controlled, and the wall thickness precision and quality of the part are greatly improved.

Description

Roundness control device for thin-wall cylinder

Technical Field

The utility model relates to the technical field of process tools for processing and assembling thin-wall cylinders, in particular to a roundness control device for a thin-wall cylinder.

Background

The large length-diameter ratio thin-wall cylinder is characterized by poor rigidity and easy deformation, and is subjected to clamping force, cutting force and cutting heat in the processing process or residual stress release (welding, spinning, casting and the like) in the forming process after the processing is finished, so that a ring drum and a cross section ellipse are formed in the thin-wall part of the cylinder, and the processing positioning standard, assembly and integral assembly of subsequent parts are influenced, and therefore, the roundness is controlled during the processing by adopting a proper auxiliary tool; and correcting the roundness of the part before assembling, and keeping the roundness of the product to avoid assembling interference caused by part deformation.

When the thin-wall cylinder with large length-diameter ratio is processed, an auxiliary support is usually added in the middle section of the cylinder by adopting a center frame, and when the cylinder support part is deformed to different degrees after the stress of the heat treatment in the previous working procedure is released, the center frame support position is generally processed in a one-clamping-one-pushing mode, and then the precision requirement of parts is ensured in a one-clamping-one-frame mode. However, the weak rigidity part adopts the clamping scheme, so that the dimensional accuracy, the form and position tolerance and the surface roughness of the part are easily affected by cutting heat, cutting vibration and other factors in the cutting process, a clamping processing mode which is easier to maintain the roundness of the part and increase the rigidity of the part is required to be sought, and the quality consistency of the thin-wall cylinder is ensured. The chuck is usually adopted to hold the part tightly by assisting the opening bush, the opening bush is easy to deform although the opening bush is convenient to use, and the part is deformed when the clamping force of the chuck is excessive; or the hoop with the multipoint radial adjusting screw is arranged on the auxiliary supporting reference surface, the central shaft of the cylinder body is overlapped with the axis of the hoop by adjusting the screwing length of the screw, and then the hoop is supported by the central frame, but the hoop is required to be continuously checked and adjusted in the actual operation process, so that the hoop is not suitable for a batch production mode.

Aiming at the roundness correction of the parts before assembly, a cylinder body of a section to be corrected is sleeved into a thick-wall circular ring with circumferentially uniformly distributed screw holes, an adjusting screw rod and an arc movable pressing block are screwed in the screw holes, and the center shaft of the cylinder body is overlapped with the center of the thick-wall circular ring through a thread self-locking principle.

However, the applicable scene of the process device is limited, and the situation that the opening bushing cannot be installed exists for auxiliary support of the dumbbell-shaped middle-section thin-neck thin-wall part; centering of the hoop, the thick-wall ring and the adjusting screw rod needs to be aligned by a meter, the adjusting process depends on the technical level of operators, the auxiliary working procedure is long in time, and the efficiency is low.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides an expanding mechanism which can expand a part radially from the outer circle of a thin-wall cylindrical part to effectively contact with an irregular curved surface, so that the roundness of a thin-wall cylinder can be effectively regulated, maintained and controlled, and particularly relates to a roundness control device of the thin-wall cylinder.

The technical scheme of the utility model is as follows: the roundness control device for the thin-wall cylinder comprises a bearing bush detachably sleeved on the outer surface of the thin-wall cylinder and a conical bushing detachably sleeved on the outer side of the bearing bush, wherein the outer surface of the bearing bush and the inner surface of the conical bushing are conical, and the bearing bush is in contact with the conical surface of the conical bushing.

As a further improvement of the above technical scheme:

preferably, the bearing bush is composed of a plurality of incomplete conical rings with equal circle center angles and equal outer radius, and the space between any two incomplete conical rings is equal.

Preferably, a plurality of equidistant annular grooves are formed in the outer surface of the bearing bush, and opening rings with matched inner diameters are arranged in any annular groove.

Preferably, a threaded hole is formed in the large end face of the bearing bush, and a material returning screw rod is detachably and screwed in the threaded hole.

Preferably, the number of the threaded holes is at least 2, and a plurality of the threaded holes are distributed at equal intervals.

Preferably, a detachable spanner handle is arranged on the material returning screw.

Preferably, the outer surface of the conical bushing is provided with a central frame outer groove surface.

Compared with the prior art, the utility model has the following beneficial effects:

compared with the prior art, the utility model uses the friction operation between parallel conical surfaces to deform the thin-wall cylinder from irregular shape through the expansion and shape correction of the split bearing bush, the whole process device has simple structure, automatic centering and convenient operation, greatly improves the work load of the circle correction, well controls the roundness of the cylindrical part with larger deformation, and greatly improves the wall thickness precision and quality of the part.

Meanwhile, the operation method is simple, and is convenient and easy to operate.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a front view, cross-sectional configuration of an assembly process of the present utility model;

FIG. 2 is a schematic side view cross-sectional configuration of the assembly process of the present utility model;

FIG. 3 is a schematic front view of the bearing shell of the present utility model;

FIG. 4 is a schematic side view of the bearing shell of the present utility model;

FIG. 5 is a schematic view of the opening ring structure of the present utility model

Reference numerals: 1. bearing bush; 2. a tapered bushing; 3. an annular groove; 4. an opening ring; 5. a material returning screw; 6. a spanner handle; 7. the outer groove surface of the center frame; 8. a thin-walled cylinder.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that, in terms of "front", "rear", "left", "right", "upper", "lower", etc., the directions or positional relationships indicated are based on the directions or positional relationships shown in the drawings, which are merely for convenience in describing the present utility model and simplifying the description, but are not meant to indicate or imply that the devices or elements to be referred to must have specific directions, be configured and operated in specific directions, and thus should not be construed as limiting the present utility model, the technical solutions of the embodiments of the present utility model may be combined, and the technical features of the embodiments may also be combined to form a new technical solution.

The utility model provides the following technical scheme:

as shown in fig. 1 to 5, the device comprises a conical bushing 2, an opening ring 4, a bearing bush 1, a material returning screw 5, a spanner handle 6 and a thin-wall cylinder 8.

The bearing bush 1 is formed by equally dividing two incomplete conical rings with equal circle center angles and equal outer radii, and is formed by equally dividing a complete conical ring, and meanwhile, the two concentric time gaps are ensured to be identical in size, and the number of the bearing bushes 1 can be equally divided into a plurality of identical incomplete conical rings.

A group of material returning screws 5 (the number of the material returning screws 5 is even) are arranged on the end face of the bearing bush 1, and the conical bushing 2 is separated from the bearing bush 1 along the conical surface by utilizing the self-locking effect of threads through threaded transmission under the condition that the conical surface is locked and is inconvenient to demould; an auxiliary hole matched with the handle in size is formed in one end of the material returning screw 5; the annular grooves 3 capable of placing the split rings 4 are arranged on the outer conical surfaces of the bearing bushes 1, the end faces of the two bearing bushes 1 are aligned through mechanical limiting, when the hoop thin-wall cylinder 8 is ensured, the part is effectively and automatically centered, circumferential expansion force borne by the surface of the part is uniform and effective, and the outer diameter of the conical bushing 2 is provided with a central frame outer groove surface 7 for supporting a central frame.

The working process of the utility model comprises the following steps:

1. the device is used for maintaining roundness in the machining process.

1. During installation, an operator firstly passes the conical bushing 2 through the thin-wall cylinder 8, then places a group of bearing bushes 1 at the roundness maintaining position of the thin-wall cylinder 8, the large conical direction faces the end face direction of the part, and places the opening ring 4 in the annular groove of the large conical surface and the small conical surface of the bearing bushes 1 to ensure that the end faces of the group of bearing bushes 1 are level;

2. the conical bushing 2 is attached to the inner conical surface and the outer conical surface along the parallel direction of the conical surface of the bearing bush 1, then the end surface of the conical bushing 2 is knocked by a copper block, so that the conical surfaces are tightly attached, the applied force acting on the end surface of the conical bushing 2 is decomposed along the conical surfaces, and tiny elastic deformation is formed between the metal surfaces, so that friction force is generated, and the conical bushing 2 is self-locked; meanwhile, the smaller the angle of the taper angle is, the larger the expansion force with the same axial force applied to the bearing bush 1 is, and the expansion force can play a role in controlling the roundness of the thin-wall cylinder 8 to a certain extent;

3. the center frame is adopted to support the center frame outer groove surface 7 of the conical bushing 2, a rubber soft plate is placed on the inner wall surface of the inner hole rear section of the surface to be processed of the thin-wall cylinder body 8, vibration generated by the cutter bar and the cylinder body in the turning process is rapidly reduced through a rubber high damping effect, and meanwhile, chips can be prevented from flowing into a machine tool spindle along the inner wall of the cylinder body through rubber soft plate isolation during the inner hole turning process;

4. after the barrel body characteristics are machined, during disassembly, the material returning screw rods 5 are screwed into screw holes uniformly distributed on the large cone end face of the bearing bush 1, then the wrench 6 is inserted into auxiliary holes at the top of the material returning screw rods 5, so that manual rotation is facilitated, until the end faces of the material returning screw rods 5 contact the end faces of the conical bushes 2, and when the material returning screw rods 5 are used for relieving the self-locking state of the conical bushes 2, the opposite material returning screw rods 5 are required to be simultaneously rotated in sequence through the wrench handle 6 until the bearing bush 1 is separated from the conical faces of the conical bushes 2; the reject screw 5 is conditioned to withstand and transmit a certain torque.

2. The device is used for roundness correction before assembly.

1. When in installation, an operator places a group of bearing bushes 1 at the roundness to be adjusted of the thin-wall cylinder 8, the small cone direction faces the end face direction of the part, and a plurality of opening rings 4 are respectively placed in annular grooves of the large conical surface and the small conical surface of the bearing bushes 1, so that the end faces of the group of bearing bushes 1 are ensured to be level;

2. the conical bushing 2 passes through the thin-wall cylinder 8 and is attached along the parallel direction of the conical surface of the bearing bush 1 to the inner conical surface and the outer conical surface, and then the end surface of the conical bushing 2 is knocked by a copper block, so that the conical surfaces are tightly attached;

3. after standing for a plurality of hours, the roundness control device is detached from the cylinder;

4. during disassembly, the material returning screw 5 is screwed into screw holes uniformly distributed on the large cone end face of the bearing bush 1, and then the wrench handle 6 is inserted into an auxiliary hole at the top of the material returning screw 5, so that manual rotation is facilitated until the end face of the material returning screw 5 contacts the end face of the conical bushing 2, and when the conical bushing 2 in a self-locking state is disassembled by using the material returning screw 5, the opposite material returning screws 5 are required to be simultaneously rotated in sequence until the bearing bush 1 is separated from the conical surface of the conical bushing 2.

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

Claims

1. The roundness control device for the thin-wall cylinder is characterized by comprising a bearing bush (1) detachably sleeved on the outer surface of the thin-wall cylinder (8) and a conical bushing (2) detachably sleeved on the outer side of the bearing bush (1), wherein the outer surface of the bearing bush (1) and the inner surface of the conical bushing (2) are conical, and the bearing bush (1) is in contact with the conical surface of the conical bushing (2);

the bearing bush (1) is composed of a plurality of incomplete conical rings with equal circle center angles and equal outer radius, and the space between any two incomplete conical rings is equal;

a plurality of equidistant annular grooves (3) are formed in the outer surface of the bearing bush (1), and opening rings (4) with matched inner diameters are arranged in any annular groove (3).

2. The roundness control device of the thin-wall cylinder according to claim 1, characterized in that a threaded hole is formed in the large end face of the bearing bush (1), and a material returning screw (5) is detachably screwed in the threaded hole.

3. The thin-walled cylinder roundness control apparatus of claim 2, wherein the number of the screw holes is at least 2, and a plurality of the screw holes are equally spaced.

4. The roundness control device of the thin-walled cylinder according to claim 2, characterized in that the material returning screw (5) is provided with a detachable wrench handle (6).

5. The roundness control device of the thin-walled cylinder according to claim 1, characterized in that the outer surface of the conical bushing (2) is provided with a center frame outer groove surface (7).