KR20160053660A

KR20160053660A - Regeneration method for the crane wheels

Info

Publication number: KR20160053660A
Application number: KR1020140153018A
Authority: KR
Inventors: 정기윤
Original assignee: 정기윤
Priority date: 2014-11-05
Filing date: 2014-11-05
Publication date: 2016-05-13

Abstract

The present invention relates to a method for manufacturing a crane, comprising the steps of: preparing a joining member having a circular ring cross-sectional shape; machining a deformed portion of the outer circumferential surface of the crane wheel to flatten the outer circumferential surface of the crane wheel; And the coupling member is coupled to the outside of the crane wheel while allowing the inner diameter of the coupling member to be shrunk and restored after the insertion of the crane wheel into the outside of the crane wheel.
As described above, in the traveling wheel recycling method for a crane, the engaging member having a circular ring cross-sectional shape temporarily increases the inner diameter so that the engaging member is inserted into the crane wheel at the time of insertion so that the outer periphery of the crane wheel, The coupling member is stably engaged with the outside of the crane wheel while the inner diameter of the coupling member is contracted and restored. Accordingly, the outer circumferential surface portion of the crane wheel, which has been reduced in strength through the cutting operation according to the uneven wear of the crane wheel, is reinforced by the engaging member, so that the crane wheel can be reused.

Description

[0001] The present invention relates to a regeneration method for crane wheels,

The present invention relates to a traveling wheel regeneration method for a crane that enables reuse without replacement when uneven wear occurs in a traveling wheel of a crane.

Generally, crane is used mostly in industries that manufacture industrial machinery, heavy industries, and machinery such as thermal power, hydroelectric power, and nuclear power plant. At this time, the RTGC for the overhead cranes, the RTGC for the docks, the unloader-the cranes, and the like have a meandering operation phenomenon due to partial or overall irregular wear.

Here, the meandering running phenomenon refers to a phenomenon in which a wheel rolling on a rail rolls away from one side without running straight, which is a state in which friction occurs when the wheel hits the rail. Due to the friction generated at this time, an unreasonable load is applied to various parts, and the uneven wear is generated, and the equipment does not operate normally and causes irregular and unstable operation. If the uneven wear or damage of the wheel caused by the jamming operation is continued, various machines will be broken down, and the center of gravity of the crane itself may not coincide with each other, which may cause a serious accident.

Accordingly, although the traveling wheel of the crane has a semi-permanent durability, due to the continuous rubbing of the rail and the wheel due to the steady running, irregular wear occurs, so that the wheel must be replaced prematurely, .

Such a technique for the uneven wear of a crane wheel is disclosed in Korean Patent Laid-Open Publication No. 10-2001-0111697 (December 20, 2001).

An object of the present invention is to provide a traveling wheel regeneration method for a crane that enables reusing without causing the uneven wear on the traveling wheel of the crane.

The present invention relates to a method of manufacturing a crane, comprising the steps of: preparing a joining member having a circular ring cross-sectional shape; processing an unevenly deformed portion of the crane wheel circumferential surface to flatten the outer circumferential surface of the crane wheel; And causing the coupling member to be coupled to the outside of the crane wheel while allowing the inner diameter of the coupling member to be shrunk and restored after the insertion of the crane wheel into the outside of the crane wheel, do.

Further, the engaging member may be a forging material.

In addition, the inner diameter of the engaging member may be formed to be smaller than the flat outer diameter of the crane wheel. Here, the inner diameter of the coupling member may be smaller than the diameter of the flattened peripheral surface of the crane wheel by 0.01 mm to 0.015 mm.

The step of inserting the engaging member into the outer side of the crane wheel includes the steps of heating and expanding the engaging member and inserting the inserting member into the crane wheel by checking the inner diameter dimension of the engaging member expanded in a heated state, , Inserting the coupling member outside the crane wheel, and cooling the coupling member.

In addition, when the inner diameter of the joint member heated and expanded is smaller than or equal to the diameter of the flattened peripheral surface of the crane wheel, a physical force is applied to the inside of the joint member to increase the inner diameter of the engagement member You can do more.

In addition, the joining member may be heated to 150 to 250 ° C.

The traveling wheel recycling method for a crane according to the present invention is characterized in that the engaging member having a circular ring cross-sectional shape temporarily encloses the inside of the crane wheel so that the engaging member is inserted into the crane wheel The coupling member is stably coupled to the outside of the crane wheel while the inner diameter of the coupling member is contracted and restored. Therefore, the outer circumferential surface portion of the crane wheel, which has been reduced in strength through cutting operation in accordance with the uneven wear of the crane wheel, is reinforced by the engaging member, so that the crane wheel can be reused.

1 is a flowchart illustrating a method of regenerating a traveling wheel for a crane according to an embodiment of the present invention.
Fig. 2 is a state sectional view showing a traveling wheel regeneration method for a crane according to Fig. 1;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

FIG. 1 is a flowchart showing a traveling wheel recycling method for a crane according to an embodiment of the present invention, and FIG. 2 is a state sectional view showing a traveling wheel recycling method for a crane according to FIG. Referring to FIGS. 1 and 2, the traveling wheel recycling method for a crane includes a joining member preparation step (S100), a crane wheel circumferential surface machining step (S110), and a joining member insertion step (S120) have.

First, the coupling member 200 is prepared as a recyclable material to be inserted into the outer circumferential surface of the crane wheel 100 (S100). At this time, the joining member 200 is formed in a circular shape (not shown) so as to support and support the crane in a contact state on a rail that is a traveling path of a crane (not shown) while being closely disposed so as to surround the outer circumferential surface of the crane wheel 100 Sectional shape of the ring. The inner circumferential surface of the engaging member 200 has a shape corresponding to the outer circumferential surface of the crane wheel 100 and the outer circumferential surface of the engaging member 200 Is formed in a spherical shape so as to move the crane while rotating on the rail. Here, the joining member 200 is preferably made of the same material as the crane wheel 100, but it is not limited thereto, and a material having higher strength than the crane wheel 100 may be used. to be.

The inner diameter 'a' of the coupling member 200 is formed to be smaller than the outer diameter 'b' of the outer circumferential surface of the crane wheel 100, which has been machined to the outer circumferential surface. The inner diameter of the coupling member 200 is formed to be smaller than the diameter of the outer circumferential surface of the crane wheel 100. The coupling member 200 is inserted into the crane wheel 100 in a heated and expanded state, So that the state of engagement with the crane wheel 100 can be stably maintained through contraction due to cooling of the coupling member 200. At this time, the inner diameter of the coupling member 200 is formed to be 0.01 mm to 0.015 mm smaller than the outer peripheral diameter of the crane wheel 100 processed. When the inner diameter of the coupling member 200 is smaller than the outer diameter of the crane wheel 100 by 0.015 mm, the coupling member 200 in a heated state is inserted into the crane wheel 100 It becomes difficult to combine. On the other hand, when the inner diameter of the coupling member 200 is less than 0.01 mm less than the outer diameter of the crane wheel 100, the coupling member 200 is inserted and disposed outside the crane wheel 100 However, there is a problem that the coupling force with the crane wheel 100 is not stable when cooling is performed.

After the joining member 200 is prepared, the uneven outer circumferential deformation portion of the crane wheel 100 is machined (S110). That is, the outer circumferential surface of the crane wheel 100 is cut to be flat. At this time, the crane wheel 100 carries out a cutting operation on the outer circumferential surface of the turning lathe, but it is needless to say that the turning lathe other than the turning lathe can be used.

After the outer peripheral surface deformed portion of the crane wheel 100 is flattened, the inner circumferential surface of the engaging member 200 is closely contacted with the outer circumferential surface of the crane wheel 100, (S120). That is, the coupling member 200 is inserted into the outer side of the crane wheel 100 so as to surround the cut peripheral surface of the crane wheel 100. The inner diameter of the coupling member 200 is formed to be smaller than the diameter of the outer peripheral surface of the crane wheel 100. The inner diameter of the coupling member 200 is smaller than the outer diameter of the crane wheel 100 And then is contracted in a state of being inserted into the outside of the crane wheel 100 to be fixedly coupled to the outside of the crane wheel 100 in an inserted state.

The step of causing the engaging member 200 to be inserted into the machined outer side of the crane wheel 100 will be described in more detail. The engaging member 200 is heated by heating the engaging member 200 The inner diameter of the crane wheel 100 is expanded to be larger than the diameter of the outer circumference of the crane wheel 100 so as to be flat (S121). At this time, the heating temperature for increasing the inner diameter of the coupling member 200 is maintained at 150 to 250 ° C. If the heating temperature of the joining member 200 is less than 150 ° C, the expansion rate is lowered. If the heating temperature of the joining member 200 is more than 250 ° C, a problem arises in strength due to tissue deformation.

In this way, the inner diameter of the coupling member 200 is checked to confirm whether the coupling member 200 expanded by the heating can be inserted outside the crane wheel 100 (S122).

When it is confirmed that the check inner diameter of the coupling member 200 is expanded to the extent that it is inserted into the outer side of the crane wheel 100, the coupling member 200 is inserted outside the crane wheel 100 (S123). If the inner diameter of the joint member 200 heated and expanded is smaller than or equal to the diameter of the flattened peripheral surface of the crane wheel 100, a physical force is applied to the inner side of the heated joint member 200, An operation of increasing the inner diameter of the member 200 can be performed. At this time, a plurality of hydraulic jockeys (not shown) are disposed on the inner side of the coupling member 200 so as to be spaced apart from each other in the circumferential direction, and the hydraulic jockey is engaged with the inner side of the coupling member 200, The inner diameter of the coupling member 200 is increased while generating a force. After the coupling member 200 is inserted outside the crane wheel 100, the coupling member 200 is cooled at a temperature of 15 to 25 ° C (S124). Thus, when the coupling member 200 is cooled, the coupling member 200 is contracted again in the expanded state, and the coupling member 200 is stably coupled to the outside of the crane wheel 100 in a fixed state.

As described above, in the traveling wheel recycling method for a crane according to the embodiment, when the engaging member 200 having a circular ring cross-sectional shape surrounds the outer side of the crane wheel 100, The inner diameter of the coupling member 200 is temporarily increased so as to be inserted into the crane wheel 100 and then the inner diameter of the coupling member 200 is contracted and restored. A stable connection is made to the outside of the body 100. Accordingly, the outer circumferential surface portion of the crane wheel 100, which is reduced in strength, is reinforced by the engaging member 200 through the cutting operation according to the uneven wear of the crane wheel 100, so that the crane wheel 100 can be reused .

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: Crane wheel 200:

Claims

Preparing a joining member having a circular ring cross-sectional shape;
Machining the unevenly deformed portion of the outer surface of the crane wheel to flatten the outer surface of the crane wheel;
A step of causing the engaging member to be coupled to the outside of the crane wheel while allowing the inner diameter of the engaging member to be contracted and restored after the engaging member is inserted into the outside of the crane wheel in a state in which the inner diameter of the engaging member is temporarily expanded, And a driving wheel for a crane.

The method according to claim 1,
Wherein the engaging member is a forging material.

The method according to claim 1,
Wherein an inner diameter of the engaging member is smaller than a diameter of a flattened peripheral surface of the crane wheel.

The method of claim 2,
Wherein an inner diameter of the engaging member is smaller than a diameter of a flattened peripheral surface of the crane wheel by 0.01 mm to 0.015 mm.

The method according to claim 1,
The step of inserting the coupling member into the outside of the crane wheel includes:
Heating and expanding the engagement member,
Checking an inner diameter dimension of the engaging member expanded in a heating state to confirm whether or not the engaging member can be inserted outside the crane wheel,
Inserting the coupling member outside the crane wheel,
And cooling the coupling member.

The method of claim 5,
Further performing an operation of increasing the inner diameter of the coupling member by applying a physical force to the inner side of the heated coupling member when the inner diameter dimension of the coupling member heated and expanded is smaller than or equal to the diameter of the flattened outer peripheral face of the crane wheel Of the traveling wheel for a crane.

The method according to claim 1 or 5,
Wherein the joining member is heated to 150 to 250 ° C.