KR20090050548A

KR20090050548A - A method of manufacturing crane double girder

Info

Publication number: KR20090050548A
Application number: KR1020070117057A
Authority: KR
Inventors: 문명주
Original assignee: 주식회사 파일러트중공업
Priority date: 2007-11-16
Filing date: 2007-11-16
Publication date: 2009-05-20

Abstract

The present invention is to provide a method for manufacturing a crane double girder, preferably to implement a girder installed in the vertical direction and the running rail, and a method for manufacturing birds attached to the bottom of the girder.

Crane, girder, saddle, welding, double

Description

A method of manufacturing crane double girder

The present invention relates to a double rail crane, and more particularly, to a crane double girder comprising a girder perpendicular to the rail and a saddle placed on the bottom of the girder and welding them. It is about a manufacturing method.

As is well known, a crane refers to a mechanical device for lifting and lifting a heavy object horizontally by using power, and moving, traversing, turning, etc. for lifting and lowering a heavy object and moving horizontally. These operations are combined with each other to handle heavy objects in three-dimensional space.

Hoists are used to transport heavy loads in warehouses and railway stations, or to disassemble and assemble machines in factories. In addition, the hoist is installed on the girder of the crane, one of the mechanisms for lifting and lowering the load using a wire rope as a pair of hoisting motors, reducers, wire drums, etc. and attaching hooks at the ends of the hoisting rope to lift heavy materials.

On the other hand, there are various types of hoists installed on the girder of the crane depending on the place of use and the structure of the machine. Specifically, a low-head crane used in a low ceiling, a double rail crane traveling on two rails And single rail cranes that travel on the lower flange of the I-beam by rail.

In this way, the hoist is installed and the girder used as a means for moving the hoist in the forward / rear direction is manufactured in various forms. Among them, a double rail crane for traveling two rails will be described with reference to FIG. 1. It demonstrates concretely.

As shown in FIG. 1, the double rail crane has a running rail 10 installed along a wall facing each other, and a saddle 30 having a driving drive provided on an upper surface of the running rail 10. It is formed long along the running rail 10. The lower end of the saddle 30 is provided with a traveling wheel to run while rotating along the running rail 10, and a driving motor 34 for providing rotational power to the traveling wheel. The driving motor 34 is axially coupled to the driving wheel to generate rotational force when the power is applied to rotate the driving wheel coupled to the shaft. When the driving wheel rotates, the saddle 30 moves along the running rail 10.

In addition, a girder 20 is provided in a direction perpendicular to the traveling rail 10, and bottom surfaces of both ends of the girder 20 are fastened to the top surface of the saddle 30. At this time, when the saddle 30 travels along the running rail 10, the girder 20 coupled to the upper surface of the saddle 30 travels. In addition, a transverse rail 22 is installed on the upper surface of the girder 20 in a direction perpendicular to the traveling rail 10, and the hoist 40 traverses along the transverse rail 22.

Accordingly, the present invention is to provide a method for manufacturing a crane double girder, preferably to provide a girder installed in a vertical direction with the running rail, and a method for manufacturing birds attached to the bottom of the girder.

In order to solve the problems as described above, in the present invention, the step of producing a square iron frame with a square and diagonal dimensions accurately based on the rectangular, and the side plate is placed on the floor to match the length of the plate, then connected to both sides of the iron plate Girder camber work step to weld to both ends after mounting the height and height of the site, and side plate steel plate to keep 300mm or more with the steel plate of the upper plate and the lower plate while keeping the side plate at least 300mm apart Step, connecting the upper and lower plates to weld the flat iron square foil to the upper and lower plates in a straight line and a small angle, and after mounting the girder side plate and the upper and lower plates, placing the H-BEAM on both ends of the girder on the basis of the bottom surface The girder welding step for welding while leveling both sides and welding while moving the welder to the same current value from both ends inward, WALK WAY work to lay sideways and divide straight by holding and marking a straight line at both ends with reference to the bottom surface of the R-band, marking the equal parts with right angles, and then marking the dimensions of the cambers and mounting and welding the channel at right angles. Steps and girders and saddle settings to level the 'A' and 'B' parts with the leveler using the beam and the 'C' and 'D' parts with the leveler to adjust the height and height to keep the height constant. It is characterized by consisting of steps.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In the following description will be presented a representative embodiment in the present invention to achieve the above technical problem. And other embodiments that can be presented with the present invention are replaced by the description in the configuration of the present invention.

In the present invention will be described in detail a method for producing a double girder of a double rail-type crane, in the following it will be described in each step to facilitate understanding. That is, the manufacturing and setting process of the girder and the saddle will be described in detail.

1. Made of flat iron square frame

As shown in Figure 2a, the flat iron square frame is based on the rectangular, and when manufacturing the jig is produced by exactly matching the square and diagonal dimensions. In other words, make a jig with the diagonals of the two parts of 'C' equal to the right angles of 'A' and 'B', and then raise the flat iron on the upper part of the jig However, when mounting, weld at right angles.

2. Girder Camber (girder camber ) Workflow

As shown in Figure 2b, 1) the side plate iron plate is placed on the floor in accordance with the length of the span, and 2) the height and height of the connecting portion of both sides of the iron plate after mounting and welding inward from both ends. 3) Use the tape measure as in 'A' to divide the marking into equal parts according to the drawing dimensions. 4) Draw a straight line at both ends by the height of the camber to make the 'reference point'. 5) Divide and mark according to the dimensions of the camber as shown in the 'B' section, and draw a line exactly on the 'A' bisector. 6) Mark the dimensions of the camber as shown in the 'C' section and mark the camber equally to the height of the side of the girder and draw a line. 7) The side plate is cut after marking 2 ~ 3mm longer than the drawing dimension. In this case, the cutting thickness is included and the cutting point should be cut based on the marking line.

3. Stringer iron Mounting

As shown in Figure 2c, when mounting the side plate iron plate should be kept at least 300mm away from the other side, and at least 300mm with the upper plate and the lower plate.

4. Top and bottom plate connection method

As shown in Figure 2d, when the upper plate and the lower plate is connected by marking the center of the iron plate width as a reference point, and then mark the 'A' width dimension (that is, the side plate end dimension) and then draw a line. As shown in FIG. 2E, the upper and lower plates are marked by dividing the straight lines and equal parts of 'A' and 'B', and then the flat iron square frame is mounted at a straight line and at a right angle to be welded. In addition, as shown in Figure 2f when the side plate flat iron is mounted on a right angle, the welding method is welded based on the welding notation method as shown in the upper portion.

5. Girder welding method

As shown in Figure 2g, after mounting the girder side plate and the upper and lower plates, the girder by raising the H-BEAM on both ends of the girder relative to the bottom surface and horizontally the 'A' portion and 'B' portion on both sides of the beam Place the beam on the beam, and then the two welders weld the welder at the same current with both ends moving inward. At this time, during the lower welding, the welding while moving from the inside to the outside as shown in Figure 2h. In addition, precautions when welding the upper and lower plates and the side plate should not pit the side plate as shown in Figure 2i.

6. WALK WAY work method

As shown in Fig. 2j, the girders are laid on their side and the straight lines are held at both ends with respect to the R-bending bottom surface and marked and divided into equal parts as 'A'. Thereafter, the equal parts are marked at right angles, as shown in FIG. 2K, and the dimensions are marked at the angles of the camber to mount and weld the channel at right angles.

7. How to set girders and birds

As shown in Figure 2l, level the 'A' and 'B' part with the leveler using the beam and adjust the height and the level using the leveler with the 'C' and 'D' part to adjust the height uniformly. Fit. And as shown in Figure 2m 'E', 'F' right angle and 'G', 'H' diagonal to check the dimensions to be included within 2mm, and then work, set the girders and birds and then install the rail 'I' The part spacing should be within 2mm.

8. Rails and WALK WAY Mounting and welding method

First, set the girders and saddles, keep the rail distance within 0 ~ 2mm and keep the straightness correctly when installing the rails. After the mounting and welding as shown in Figure 2n, the WALK WAY ANGLE is fastened with bolts by maintaining the right angle to the channel, and the upper and middle pipes are mounted and welded to match the ANGLE vertically and horizontally. At this time, the correct method of the rail mounting welding is shown in Figure 2o, the rail mounting interval and the welding method is shown in Figure 2p.

9. How to Finish Both Ends of Girder

As shown in Fig. 2q, both end plates and ribs must be kept at right angles, and the side rib brackets are held at 45 ° for welding.

10. Saddle manufacturing process and mounting welding method

As shown in FIG. 2R, the channel length 4EA is equally cut and cut into oxygen, and the channel rib ribbed iron plate is cut and finished while maintaining a rectangle, and the panel finish iron sheet is also cut and finished by maintaining a rectangle. . Then, as shown in FIG. 2S, the flange is fitted to one side at right angles, and the other side is assembled by turning the rear wheel and the wheel to assemble the flange and checking the straightness with the thread. Next, after the welding of the sole flange is completed, bolt the motor flange to the saddle and insert it into the saddle.

11. Saddle mounting process

As shown in Fig. 2t, a jig capable of working birds is made, the jig is kept horizontal, the panel is placed on the jig at right angles, and the plate and the closing plate are mounted at right angles. Mount it. It is advisable to lay the birds aside when mounting the Sauren Flange.

1 is a view showing a state in which a double rail crane according to the prior art is installed.

Figure 2a to 2t is a view showing in detail a manufacturing method of a crane double girder according to an embodiment of the present invention.

Claims

In the manufacturing method of the double girder of the double rail crane

Manufacturing a flat iron square frame by accurately matching the rectangular dimension and the diagonal dimension with respect to the rectangular;

A girder camber working step of placing the side plate iron plate on the floor according to the span length, and then attaching the height and height of both connecting portions of the iron plate and welding them to both ends;

A side plate mounting plate step of maintaining a distance of at least 300 mm from the other side when the side plate is mounted, and maintaining at least 300 mm with the upper and lower plates;

An upper and lower plate connecting step of welding the flat iron square foil to the upper and lower plates in a straight line and a small angle;

A girder welding step of placing the H-BEAM at both ends of the girder and mounting both beams horizontally based on the bottom surface of the girder and installing the upper and lower plates, and moving the inner side at both ends to weld the same current value;

WALK WAY to lay the girder to the side and hold and mark a straight line at both ends with respect to the bottom surface of the R-band, and then divide the divided parts into right angles, and then mark the dimensions with the angles of the camber to mount and weld the channel at right angles. Working steps;

It consists of girders and saddle setting steps that use beams to level 'A' and 'B' with levelers and 'C' and 'D' parts with levelers to adjust height and day to adjust height. Crane double girder manufacturing method characterized in that.