KR100807311B1 - Jig for crane boom assembly and process for producing capusing the same - Google Patents

Abstract

A jig for a crane boom assembly and a producing method using the same are provided to standardize production of products by welding a pair of horizontal and vertical plates to be tightly supported so as to be shaped as a rectangle. A jig for a crane boom assembly includes a base frame(11), a plurality of supporting bodies(13), vertical and horizontal vises(15a,15b), and a fixing jig. The supporting bodies are installed on an upper surface of the base frame at regular intervals. The supporting body includes a pair of vertical members(13a,13b) and a horizontal member(13c). The vertical members are vertically installed on the upper surface of the base frame. The horizontal member connects the upper ends of the pair of vertical members to each other. The vertical and horizontal vises are fastened at the pair of vertical members and the horizontal member to press horizontal and vertical plates. The fixing jig is installed to place the horizontal plate on the upper surface of the base frame.

Description

JIG FOR CRANE BOOM ASSEMBLY MANUFACTURING AND MANUFACTURING METHOD USING THE SAME {JIG FOR CRANE BOOM ASSEMBLY AND PROCESS FOR PRODUCING CAPUSING THE SAME}

1 is a view showing a crane vehicle to which a general crane boom assembly is applied,

2 is an exploded perspective view illustrating a boom of a typical boom assembly;

3 is a perspective view showing a jig for manufacturing a boom assembly according to the present invention;

Figures 4a to 4e is a view for explaining a manufacturing method of the boom assembly using a jig for producing a crane boom assembly according to the present invention.

<Explanation of symbols for the main parts of the drawings>

1: crane

3: boom stand

10: jig

11: base frame

13: support

15a, 15b: Horizontal / Vertical Vise

17: fixture jig

19: Template

The present invention relates to a crane boom assembly in which a plurality of booms are coaxially coupled and selectively stretched, and more particularly, the plurality of panels forming the booms can be firmly and easily bonded to each other, resulting in distortion due to heat deformation generated during welding. The present invention relates to a crane boom assembly manufacturing template and a manufacturing method using the same to stably prevent the phenomenon such as to improve the product quality.

Cranes, also commonly referred to as cranes, are machines that lift heavy materials and move them in the vertical and horizontal directions. These cranes are used for the three-dimensional movement of materials, products, and other heavy objects in various factories, ports, warehouses, power plants, and construction works, and are used to handle heavier objects than hoists or chain blocks.

These cranes are very diverse, and are classified into ceiling cranes, jib cranes, bridge cranes, tower cranes, wheel cranes, derrick cranes, and truck cranes according to handling items and places of use.

The overhead cranes are generally widely used and installed on ceilings in factories, warehouses, and other buildings. The overhead cranes are provided for traveling on rails mounted on both walls, and are provided with hoisting devices, traversing devices, and traveling devices. Used to transport products and materials in the factory. In addition, each facility is equipped with an electric motor for operation, and the winding capacity is often 5 to 50 tons, and may be up to 200 to 500 tons.

The jib crane has an arm called a jib in a steel tower at a construction site, a harbor wall, etc., and moves goods on a shaft that hangs at an end of a wire rope passing through the jib crane.

The bridge crane is composed of a left and right pier and a girder supported by the pier and a trolley transversely above the pier and travel on a rail installed on the ground. Mainly traveling on rails installed on outdoor ground, various loading and unloading operations are possible. Transport heavy goods, miscellaneous goods, and raw materials of products according to the handling items. The piers are about 10 to 100 meters apart.

The tower crane is a pivoting portion of the jib crane is installed on a high tower, the swing radius is large and can be mounted high. Mainly used to assemble high hulls in shipyards. In general, the lifting capacity is 5 to 80 tons, the head lift is 15 to 40 meters above the ground, and the turning radius is 20 to 40 meters.

On the other hand, in addition to the fixed-mounted crane, there are truck cranes mounted on a mobile vehicle, that is, a truck, and the like, as shown in FIG. 1, in the form of a lower traveling body in which a crane 1 is mounted on a truck chassis. In this case, the maneuverability is excellent. In addition, the truck crane is provided with a boom assembly having a predetermined length, the boom assembly at this time is configured to adjust the inclination angle of the plurality of boom stand (3) by the hydraulic operation to the winding and unwinding in the desired work space It is operated so that the hook 5 which is lifted by it can be positioned.

Here, the boom assembly mounted on the truck crane is usually arranged by coaxially placing several booms 3 having different diameters, and is selectively multi-stage by the hydraulic cylinder installed inside each of these booms (3) It is a configuration that is contracted by being stretched and operated in the reverse order.

On the other hand, the boom assembly 3 constituting the boom assembly is a plate-shaped member having a predetermined length, that is, a pair of vertical plate 110 to form a side plate to be disposed perpendicular to the left and right sides as shown in FIG. ) And a pair of horizontal plates 3h which are located on the upper and lower sides of the pair of vertical plates and are joined by welding.

However, the boom constituting the conventional crane boom assembly simply performs welding in a state where the horizontal plate 3h and the vertical plate 3v are arranged at right angles on the welding support, so that the welding quality is not only degraded, but also the high heat generated during welding. Due to the warpage phenomenon caused by thermal deformation, there was a problem such as product defects and quality deterioration.

The present invention was created in order to solve the above problems, the present invention is performed when welding in a state in which a pair of vertical plate and a pair of horizontal plate constituting the boom stably clamped to form a square tube shape and occurs during welding The purpose of the present invention is to provide a jig for manufacturing a crane boom assembly and a manufacturing method using the same so that the warpage phenomenon due to high temperature can be prevented and the quality can be improved by standardization of the product.

Jig for producing a crane boom assembly according to an embodiment of the present invention for realizing the above object is a pair of horizontal plates arranged up and down and a pair of vertical plates disposed on the left and right sides of these pair of horizontal plates In the jig for manufacturing a boom having a rectangular tube shape,

A base frame of the length member; A pair of vertical members are disposed at equal intervals on the upper surface of the base frame, and the boom elements are positioned inwardly, and a pair of vertical members disposed vertically at intervals on the upper surface of the base frame and horizontal members interconnecting the upper ends of the vertical members. A support; Vertical and horizontal vises arranged at right angles to the horizontal and vertical members and screwed to one end to press at least one horizontal and vertical plate positioned inside the support; Being provided on the upper surface of the base frame is characterized in that it comprises a fixed jig to which any horizontal plate constituting the bottom plate of the boom is raised.

As a preferable feature of the present invention, it is configured to include a template made of a plate member that is fitted to the inside of the boom is arranged inside the support.

In another preferred aspect of the present invention, at least one of the vertical members of the pair of vertical members is formed in the vertical hole in the vertical direction so that the horizontal vise can be moved in the vertical direction, the other vertical member is the horizontal It is to form the reference surface to which the outer surface of the other vertical plate which does not receive a pressing force from a vise is in close contact.

As another preferable feature of the present invention, the horizontal member is a horizontal long hole is formed in the horizontal direction so that the vertical vise can be moved in the horizontal direction.

As another preferable feature of the present invention, the horizontal and vertical vices are respectively located on the outside of the support and the handle portion receiving the operating force of the operator, and vertically connected to the handle portion while passing through the horizontal and vertical members constituting the support It comprises a screw shaft, a nut member which is provided on the inside and the outside of the support, respectively, and screwed to the screw shaft, and a pressing member rotatably coupled to the end of the screw shaft and in contact with the side of the boom .

As another preferable feature of the present invention, the fixing jig is provided to be slidably moved in the direction in which the pressing force of the horizontal vise acts.

In the method for manufacturing a crane boom assembly according to an embodiment of the present invention for realizing the above object, in the manufacturing method for welding a pair of vertical plate and horizontal plate constituting a square tube-shaped boom,

Placing any one of a pair of horizontal plates on an upper surface of a fixing jig located inside a support having a rectangular frame shape provided at equal intervals above the base frame of the length member; Placing a plate-shaped template having a shape corresponding to the inner surface of the boom on an upper surface of the horizontal plate; Providing a pair of vertical plates in close contact with each other on both sides of the template to form left and right walls of the boom; Pressing a vertical plate disposed by a horizontal vice provided to be horizontally moved by being screwed to one of the vertical members of the support and moving in close contact with the other vertical member side; Placing one horizontal plate remaining on an upper surface of the template; Pressing horizontal plates disposed opposite to each other by a vertical vise screwed to the horizontal member of the support to move vertically; It characterized in that it comprises a step of welding and cooling the connecting portion of the pair of horizontal plate and the vertical plate constituting the boom fixed to the slope.

As a preferred feature of the present invention, the step of releasing the pressing force of the vertical and horizontal vise after the cooling of the boom and removing the template located inside the boom further.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to this, the terms or words used in the present specification and claims are consistent with the technical spirit of the present invention based on the principle that the inventor can appropriately define the concept of the term in order to explain the invention in the best way. It must be interpreted as meaning and concept.

Hereinafter, a preferred embodiment of a jig for manufacturing a crane boom assembly according to the present invention with reference to the accompanying drawings as follows.

First, the jig for producing a crane boom assembly of the present invention is for producing a boom stand provided in a square tube shape, wherein the boom stand at this time, as shown in FIG. It consists of a pair of vertical board 110 to form, and a pair of horizontal board 3h located in the upper and lower sides of these pair of vertical boards, and joined by welding.

3 is a perspective view showing a jig for manufacturing a boom assembly according to the present invention, Figures 4a to 4e is a view for explaining a manufacturing method of the boom assembly using a jig for producing a crane boom assembly according to the present invention.

As shown therein, the jig for manufacturing a crane boom assembly of the present invention is provided with a base frame 11 made of a member having a predetermined length and at equal intervals on the upper surface of the base frame 11, Of the support 13 in a tunnel form to be provided with a pair of horizontal plates 3h and vertical plates 3v, which constitute the boom 3, and the boom 3 disposed inside the support 13 Vertical and horizontal vices 15b and 15a, which are elements for pressurizing the side and the upper surface, and a horizontal plate 3h positioned at the bottom of the elements constituting the boom 3 by being mounted on the upper surface of the base frame 11. The raised jig 17 and a template 19 made of a plate-shaped member fitted to the inside of the boom 3 arranged inside the support 13 are formed.

The base frame 11 is a member of a length member having a predetermined length, and provides a space in which a plurality of supports 13 are coupled to each other. The base frame 11 includes a plurality of plate members and beam members. The base frame 11 may be manufactured by various manufacturing methods, and may be implemented by a known technique, and thus detailed description thereof will be omitted.

The support 13 is provided in plural to have a tunnel form at equal intervals on the upper surface of the above-described base frame 11, the spacing and size can be appropriately adjusted according to the length and size of the boom 3 for manufacturing. .

The support 13 has a pair of vertical members 13a and 13b disposed vertically on the upper surface of the base frame 11 and the upper ends of the pair of vertical members 13a and 13b in the transverse direction. It consists of a horizontal member 13c interconnected.

Here, in the vertical member drawing of at least one of the vertical members 13a and 13b, a vertical long hole vh is formed perpendicular to the vertical member 13a positioned on the left side, and the vertical long hole vh is horizontal The vise 15a is configured to be moved up and down. Similarly, the horizontal member 13c is formed with a horizontal long hole hh so that the vertical vise 15b to be described later can be horizontally moved in the horizontal direction.

The vertical and horizontal vices 15b and 15a pressurize any one of the vertical plates 3v forming the sidewalls of the boom stand 3 arranged inside the support 13 and the horizontal plates 3h forming the upper plate. As a pressing element, it is configured to generate or release a pressing force by being moved by a screwing method as shown in the figure.

Meanwhile, the vertical vise 15b is provided to the vertical members 13a and 13b among the elements constituting the support 13, and according to the present invention, any one vertical member 13a among the pair of vertical members 13a and 13b is provided. Proposed to install only).

The vertical vise 15b and the horizontal vise 15a of such a configuration are different from each other only in the position where they are disposed in common, and the components and operation methods are the same.

That is, the vertical vise 15b and the horizontal vise 15a are located outside the support 13, respectively, as shown in the figure, and are handled vertically to the handle part h and the handle part h receiving the operator's operating force. It is provided with a screw shaft (p), which is threaded on the outer circumferential surface to pass through the horizontal member (13c) and the vertical member (13a) constituting the support 13 and connected to the inside and the outside of the support (13), respectively. A plurality of nut members n screwed to the screw shaft p, and a pressing member t rotatably coupled to the end of the screw shaft p, and widely contacting the sides of the boom 3; do.

The vertical vise 15b and the horizontal vise 15a of such a configuration are linearly moved by the screw shaft p being screwed with the nut member n by the operator rotating the handle portion h in the forward or reverse direction. Selectively pressurizing member (t) is to press or release the upper side and one side of the boom (3).

Fixing jig 17 is provided on the upper surface of the base frame 11 described above is a member on which the horizontal plate constituting the bottom plate of the boom 3 is raised, the form of which can be mounted on the horizontal plate safely It is provided with.

The fixed jig 17 is preferably provided to slide in the direction in which the pressing force of the horizontal vise 15a acts, which is the fitting structure of the fixed jig 17 and the base frame 11 mutually uneven It may be possible by combining with the other may be carried out by a variety of known techniques.

Template 19 is a plate-shaped member that is fitted to the inside of the boom (3) disposed inside the support 13, it is provided in a shape corresponding to the close fitting to the inner surface of the boom (3) do.

Like the support 13 described above, a plurality of such templates 19 may be provided, and a pair of horizontal plates 3h and vertical plates 3v, which are elements constituting the boom 3, are welded. After cooling, the entire function of the boom 3 is distorted by welding heat.

Referring to the manufacturing method using a jig for producing a crane boom assembly configured as described above are as follows.

First, in order to weld the pair of vertical plates 3v and the horizontal plates 3h constituting the square tube-shaped boom 3, the fixing jig 17 inside the respective supports 13 of the base frame 11 described above. ).

As shown in FIG. 4A, the horizontal plate forming the bottom surface of the pair of horizontal plates 3h constituting the boom 3 is placed on the upper surface of the fixing jig 17.

Subsequently, as shown in FIG. 4B, the template 19 is placed on the upper surface of the horizontal plate mounted on the upper surface of the fixing jig 17.

As shown in FIG. 4C, a pair of vertical plates 3v constituting the boom stand 3 are disposed on both side surfaces of the template 19, respectively, and the numbers of the horizontal plates 15a are opposite to each other. Pressurize the plate. Then, by the pressing force of the horizontal vise 15a, the template 19 and the fixed jig 17 are moved in close contact with the side of the vertical member 13b which integrally forms the vertical reference plane of the support 13.

In this state, as shown in FIG. 4D, the horizontal plate forming the upper plate is placed on the upper surface of the template 19.

As shown in FIG. 4E, the above-described vertical vise 15b is operated to press the horizontal plate placed on the upper surface of the template 19 downward.

Subsequently, the pair of horizontal plates 3h and the vertical plates 3v constituting the boom stand 3 on which the slopes are fixed are welded to each other to be joined and cooled.

Finally, after cooling the boom 3, the handle portion h of the vertical vice 15b and the horizontal vice 15a is operated to release the pressing force applied to the boom 3, and the boom 3 Remove the template 19 located inside the) to complete the manufacture of the boom (3).

It is apparent to those skilled in the art that the present invention is not limited to the described embodiments, and that various modifications and changes can be made without departing from the spirit and scope of the present invention. Therefore, such modifications or variations will have to belong to the claims of the present invention.

The crane boom assembly manufacturing jig constructed and operated as described above can standardize the production of the product by allowing welding to be performed in a state where the pair of horizontal plates and the vertical plates are firmly supported from the inside and the outside to have a square tube shape. This provides an advantage that can be expected to improve yield and productivity.

In particular, by forming a template inside the boom stand prefabricated in the form of a square tube can suppress the distortion caused by the heat applied during welding provides an industrially useful effect that can prevent the occurrence of defects in advance.

Claims (8)

In the jig for manufacturing a boom having a rectangular tube shape consisting of a pair of horizontal plates arranged up and down and a pair of vertical plates disposed on the left and right sides of the pair of horizontal plates, A base frame of the length member; A pair of vertical members are disposed at equal intervals on the upper surface of the base frame, and the boom elements are positioned inwardly, and a pair of vertical members disposed vertically at intervals on the upper surface of the base frame and horizontal members interconnecting the upper ends of the vertical members. A support; Vertical and horizontal vises arranged at right angles to the horizontal and vertical members and screwed to one end to press at least one horizontal and vertical plate positioned inside the support; Fixing jig is provided on the upper surface of the base frame any one horizontal plate constituting the bottom plate of the boom is raised; Crane boom assembly manufacturing jig, characterized in that comprising a. The jig for manufacturing a crane boom assembly according to claim 1, further comprising a template made of a plate-shaped member fitted to an inside of the boom disposed inside the support. According to claim 1, wherein at least one of the vertical member of the pair of vertical member is a vertical long hole is formed in the vertical direction so that the horizontal vise can be moved in the vertical direction, the other vertical member is pressed from the horizontal vise Jig for producing a crane boom assembly, characterized in that for forming a reference surface that is in close contact with the outer surface of the other vertical plate. The jig for manufacturing a crane boom assembly according to claim 1, wherein the horizontal member has a horizontal hole formed in a horizontal direction so that the vertical vise can be moved in a horizontal direction. According to claim 1, wherein the horizontal and vertical vices are respectively located on the outside of the support and the handle portion receiving the operator's operating force, A screw shaft connected vertically to the handle portion and passing through a horizontal and vertical member constituting the support body; A nut member which is provided inside and outside of the support and is screwed to the screw shaft; A pressing member rotatably coupled to the end of the screw shaft and in contact with the side of the boom; Crane boom assembly manufacturing jig, characterized in that comprising a. The jig for manufacturing a crane boom assembly according to claim 1 or 2, wherein the fixing jig is slidably moved in a direction in which the pressing force of the horizontal vise is applied. In the manufacturing method of welding a pair of vertical plate and horizontal plate constituting a square tube-shaped boom, 1) placing any one of a pair of horizontal plates on the upper surface of the fixing jig located inside the support having a square frame shape at equal intervals above the base frame of the length member; 2) placing a plate-shaped template having a shape corresponding to the inner surface of the boom on the upper surface of the horizontal plate; 3) providing a pair of vertical plates in close contact with each other on both sides of the template to form left and right walls of the boom; 4) pressing the vertical plates disposed opposite to each other by a horizontal vice provided to be horizontally screwed to one of the vertical members of the support to move horizontally; 5) placing one remaining horizontal plate on the upper surface of the template; 6) pressurizing the horizontal plate disposed in a vertical vise provided to be vertically moved by screwing to the horizontal member of the support; 7) welding and cooling the connection portions of the pair of horizontal plate and the vertical plate constituting the boom fixed to the slope; Crane boom assembly manufacturing method characterized in that it comprises a. delete

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