CN216177435U

CN216177435U - Tool for precise cutting of bolted U-rib hand hole

Info

Publication number: CN216177435U
Application number: CN202122470364.4U
Authority: CN
Inventors: 谷文; 吴江波; 薛宏强; 陈正凯; 马敬博
Original assignee: China Railway Baoji Bridge Group Co Ltd; China Railway Baoji Bridge Yangzhou Co Ltd
Current assignee: China Railway Baoji Bridge Group Co Ltd; China Railway Baoji Bridge Yangzhou Co Ltd
Priority date: 2021-10-13
Filing date: 2021-10-13
Publication date: 2022-04-05
Anticipated expiration: 2031-10-13

Abstract

The utility model relates to a tool for precisely cutting hand holes of bolted U-shaped ribs, which comprises a profiling sample plate and a supporting plate, wherein the profiling sample plate is provided with a plurality of holes; the profiling sample plates are horizontally arranged and are parallel to the U ribs of the steel box girder plate units up and down; a profiling through hole is formed in the middle area of the profiling sample plate in a matching and penetrating mode, the profiling through hole is matched with the size and shape of a U rib hand hole of a U rib of the steel box girder unit, and the inner contour of the profiling through hole and the U rib hand hole are located on the same cutting surface; the two opposite sides of the bottom of the profiling sample plate are symmetrically fixed with the supporting plates in a matching way; one side of the supporting plate facing the U ribs of the steel box beam plate units is completely closely matched with the outer walls of the U ribs of the steel box beam plate units, and one side of the supporting plate back to the U ribs of the steel box beam plate units is matched with a positioning datum line. The utility model has simple and reasonable structural design and convenient operation and use, can realize the accurate cutting of the position and the size of the U rib hand hole of the U rib of the steel box girder unit, and can effectively solve the problem of the over-tolerance of the cutting size and the verticality caused by the traditional methods such as manual lofting cutting and the like.

Description

Tool for precise cutting of bolted U-rib hand hole

Technical Field

The utility model belongs to the technical field of steel bridge machining and manufacturing, and particularly relates to a tool for precise cutting of bolted U-rib hand holes.

Background

With the rapid development of steel structure bridges in China, the number of large-span steel box girder bridges is gradually increased, and the quality of orthotropic steel bridge deck plates becomes the key point for controlling the diseases of the steel box girders. The U-shaped rib is used as an important component of the orthotropic plate, and the processing method and the quality control are particularly critical. At present, the circular arc hand holes at the end parts of the U ribs are usually cut by manual lofting, scribing and numerical control equipment; the manual lofting, scribing and cutting are performed by workers on site, then cutting is performed according to a line by using a flame cutting torch, and if the scribing has deviation or shaking during cutting, the cutting size and the verticality cannot meet the manufacturing requirements; if numerical control equipment is used for cutting, the investment cost is high, the equipment needs to be repeatedly carried, the efficiency is low, and the requirement on the placement state of the workpiece is high; however, both of the foregoing cutting methods have difficulty in precisely controlling the size of the cut hole to the bolt hole.

Disclosure of Invention

Aiming at the technical problems in the prior art, the utility model provides the tool for precisely cutting the bolted U-rib hand hole, which has simple and reasonable structural design and convenient operation and use, can realize the precise cutting of the position and the size of the U-rib hand hole of the bolted U-rib of the steel box girder unit, and can effectively solve the problem of the over-tolerance of the cutting size and the verticality caused by the conventional manual lofting cutting and other methods.

The technical scheme of the utility model is as follows:

the tool for precisely cutting the bolted U-rib hand hole comprises a profiling template and a supporting plate; the profiling sample plates are horizontally arranged and are parallel to the U ribs of the steel box girder plate units from top to bottom; a profiling through hole is formed in the middle area of the profiling template in a matching and penetrating manner; the profiling through hole is matched with a U-rib hand hole of a U-rib of the steel box girder plate unit in size and shape, and the inner contour of the profiling through hole and the U-rib hand hole are positioned on the same cutting surface; the two opposite sides of the bottom of the profiling sample plate are symmetrically fixed with the supporting plates in a matching way; one side of the supporting plate facing the U ribs of the steel box beam plate units is completely closely matched with the outer walls of the U ribs of the steel box beam plate units, and one side of the supporting plate back to the U ribs of the steel box beam plate units is matched with a positioning datum line.

The frock that is used for bolt U rib hand hole precision cutting, wherein: one surface of the supporting plate facing the U ribs of the steel box girder plate units is an inner section, and the other surface of the supporting plate facing away from the U ribs of the steel box girder plate units is an outer section; the lower half of backup pad is the arc surface with the interior section of first half junction, just the arc surface matches with the outer arc of steel case beam slab unit U rib.

The frock that is used for bolt U rib hand hole precision cutting, wherein: the positioning reference line is engraved on the outer section of the support plate by laser.

The frock that is used for bolt U rib hand hole precision cutting, wherein: and grooves are formed in the surfaces, facing the U ribs of the steel box girder plate units, of the upper half parts of the supporting plates in a matching mode.

The frock that is used for bolt U rib hand hole precision cutting, wherein: the thickness of the supporting plate is not less than 10 mm.

Has the advantages that:

the tool for accurately cutting the bolted U-rib hand hole is simple and reasonable in structural design and simple to operate and use, can realize accurate cutting of the position and the size of the U-rib hand hole of the U-rib bolted on the steel box beam plate unit, can effectively solve the problem that the cutting size and the verticality are ultra-poor due to the conventional methods such as manual lofting cutting and the like, is safe and reliable to use, convenient and easy to implement and high in applicability, is designed aiming at the structural characteristics of the U-rib bolted on the steel box beam plate unit, and has the following advantages compared with the conventional manual lofting scribing cutting and numerical control equipment cutting:

(1) the tooling cost is low, and additional processing equipment is not required to be input;

(2) the structural design is completely matched and closely attached with the U-shaped ribs, so that the working condition of the tool is stable during use;

(3) the design has the location datum line, but the distance between accurate control frock and the bolt hole to control the distance that U rib hand hole and bolt connect the hole, guaranteed the stability of cutting quality, can the accurate theoretical profile size of cutting out, obtain the cutting plane that the straightness is stable that hangs down.

Meanwhile, the thickness of the supporting plate is not less than 10mm, so that the structural strength of the tool can be ensured; the inner contour of the profiling through hole of the supporting plate is completely consistent with the U rib of the steel box girder plate unit to ensure the close contact, so that the stability of the tool is ensured; the outer section of the supporting plate adopts laser to carve a high-precision positioning reference line, so that the precision of the positioning line is ensured; after the upper surface of the profiling sample plate is horizontal and is welded with the supporting plate, the inner contour of the profiling through hole is machined, the precision error is not more than 0.5mm, and the use precision of the tool is guaranteed.

Drawings

FIG. 1 is a schematic structural diagram of a tool for precision cutting of bolted U-rib hand holes according to the utility model;

FIG. 2 is an assembly schematic diagram of the tool for precision cutting of the hand hole of the bolted U rib and the bolted U rib of the steel box girder plate unit;

FIG. 3 is a right side view of the tooling for precision cutting of bolted U-rib hand holes of the present invention;

FIG. 4 is a top view of the tooling for precision cutting of bolted U-rib hand holes of the present invention;

FIG. 5 is a schematic diagram of the use of the tool for precision cutting of bolted U-rib hand holes of the utility model;

FIG. 6 is a schematic view of a steel box girder panel unit bolting U ribs.

Detailed Description

As shown in figures 1 to 6, the tool for the precise cutting of the bolted U-rib hand hole comprises a profiling template 1 and a supporting plate 2.

The profiling template 1 is of a rectangular plate structure, is horizontally arranged and is vertically parallel to the U ribs 4 of the steel box girder plate units; the middle area of the profiling template 1 is provided with a profiling through hole 11 in a matching and penetrating mode, the profiling through hole 11 is matched with the U-rib hand hole 41, the inner hole wall of one end of the profiling through hole 11 in the length direction is semicircular, and the inner contour of the profiling through hole 11 and the U-rib hand hole 41 are located on the same cutting surface

The four supporting plates 2 are symmetrically and vertically welded to the left side and the right side of the bottom of the profiling sample plate 1 in a pairwise matching mode, one surface, facing the U rib 4 of the steel box girder unit, of each supporting plate 2 is an inner section, and one surface, facing away from the U rib 4 of the steel box girder unit, of each supporting plate 2 is an outer section; the surfaces, facing the U ribs 4 of the steel box girder plate units, of the upper halves of the four supporting plates 2 are provided with grooves 21 in a matching manner, and the inner sections of the joints of the lower halves and the upper halves of the four supporting plates 2 are arc surfaces; the outer sections of the four supporting plates 2 are engraved with high-precision positioning reference lines 3 by using laser to ensure the precision of the positioning lines, and the supporting plates 2 longitudinally and accurately position the tool through the positioning reference lines 3 on the outer sections to ensure that the tool is separated from the bolting holes 42; the thickness of each supporting plate 2 is not less than 10mm so as to ensure the structural strength of the tool.

The inner sections of the lower half parts of the two groups of supporting plates 2 positioned at the left side and the right side of the bottom of the profiling sample plate 1 are matched and closely attached to the outer walls of the left side and the right side of the U rib 4 of the steel box girder plate unit, and the arc surfaces of the inner sections of the supporting plates 2 positioned at the left side and the right side of the bottom of the profiling sample plate 1 are completely closely attached to the arc of the U rib so as to ensure transverse positioning.

After the upper surface of the profiling sample plate 1 is horizontal and is welded with the support plate 2, the inner contour of the profiling through hole 11 needs to be machined, and the precision error does not exceed 0.5mm, so that the use precision of the tool is ensured.

The tool for precisely cutting the bolted U-rib hand hole can be used according to the following steps:

(1) firstly, a high-precision positioning reference line 3 is carved on the section of a support plate 2 by using laser, and then the support plate 2 and a profiling template 1 are welded into a whole;

(2) installing a tool for bolting the U-rib hand hole for precision cutting on the U rib, and adjusting the position of the tool to enable the inner contour of the profiling through hole 11 of the profiling template 1 and the U-rib hand hole 41 to be positioned on the same cutting surface;

(3) the flame torch was used to stick to the inner contour of the copying through hole 11 of the copying template 1, and cutting was performed after confirming that the flame center and the U-rib hand hole 41 were positioned.

The tool for accurately cutting the hand hole of the bolted U-shaped rib consists of a profiling sample plate 1 and support plates 2, the support plates 2 on the left side and the right side are closely attached to two limbs of the U-shaped rib, so that the tool is effectively fixed, and meanwhile, a high-precision positioning reference line is carved on the section of each support plate 2, so that the tool and the bolted hole can be accurately positioned by 42 inches; the copying template 1 is accurately arranged according to the size 1:1 of the U-rib hand hole 41, and meanwhile, the compensation quantity is set for compensating the size from the flame center of the cutting torch to the copying template 1 during copying cutting; when the tool is used, the positioning datum line on the support plate 2 and the bolting hole 42 are accurately controlled, the arc of the support plate 2 is completely attached to the outline of the U rib after the dimension is qualified, the two-way accurate positioning of the tool is realized, the cutting torch moves at a uniform speed along the inner outline of the profiling through hole 11 of the profiling sample plate 1 during cutting, the accurate cutting of the hand hole 41 of the U rib is realized, and the cutting dimension is completely consistent with the inner outline of the profiling through hole 11.

The working principle is as follows:

the tool for accurately cutting the bolted U-rib hand hole is formed by welding a profiling sample plate 1 and supporting plates 2, and the supporting plates 2 on the left side and the right side are completely and closely attached to the circular arc of the U rib to ensure transverse positioning. The inside supporting plate 2 is provided with a positioning datum line, when the positioning datum line is coincident with a U-rib positioning line, the tool can be longitudinally and accurately positioned, and meanwhile, the tool is effectively fixed by clamping and fixing the supporting plate 2. The profiling template 1 on the upper part is accurately arranged according to the size 1:1 of the U-rib hand hole 41, and meanwhile, the compensation quantity is set for compensating the size from the flame center of the cutting torch to the profiling template 1 during profiling cutting. During cutting, the cutting torch moves along the inner contour of the profiling plate at a constant speed, so that the accurate cutting of the U-rib hand hole 41 is realized, and the cutting size is completely consistent with the inner contour of the profiling through hole 11 of the profiling template 1.

In the implementation process, the device has the advantages of simple structure and strong operability, can completely meet the requirement of precise cutting of bolted U-rib hand holes, has obvious effect on improving the productivity, effectively improves the construction quality, and has higher practical and popularization values.

Claims

1. The utility model provides a frock for bolt U rib hand hole precision cutting which characterized in that: the tool comprises a profiling template (1) and a supporting plate (2);

the profiling sample plate (1) is horizontally arranged and is parallel to the U ribs (4) of the steel box girder plate units up and down; a profiling through hole (11) is formed in the middle area of the profiling sample plate (1) in a matching and penetrating manner; the size and shape of the profiling through hole (11) are matched with those of a U-rib hand hole (41) of a U-rib (4) of the steel box girder plate unit, and the inner contour of the profiling through hole (11) and the U-rib hand hole (41) are positioned on the same cutting surface;

the two opposite sides of the bottom of the profiling sample plate (1) are symmetrically fixed with the supporting plates (2) in a matching way; one surface of the support plate (2) facing the U rib (4) of the steel box beam plate unit is completely closely attached and matched with the outer wall of the U rib (4) of the steel box beam plate unit, and one surface of the support plate (2) back to the U rib (4) of the steel box beam plate unit is matched and provided with a positioning datum line (3).

2. The tool for precision cutting of bolted U-rib hand holes as claimed in claim 1, characterized in that: one surface of the support plate (2) facing the U rib (4) of the steel box girder plate unit is an inner section, and the other surface of the support plate facing away from the U rib (4) of the steel box girder plate unit is an outer section; the lower half part of the supporting plate (2) is an arc surface with the inner section of the joint of the upper half part, and the arc surface is matched with the outer arc of the U rib (4) of the steel box girder unit.

3. The tool for precision cutting of bolted U-rib hand holes as claimed in claim 2, characterized in that: the outer section of the supporting plate (2) is engraved with the positioning reference line (3) by laser.

4. The tool for precision cutting of bolted U-rib hand holes as claimed in claim 1, characterized in that: and one surface of the upper half part of the supporting plate (2) facing the U rib (4) of the steel box girder unit is provided with a groove (21) in a matching way.

5. The tool for precision cutting of bolted U-rib hand holes as claimed in claim 1, characterized in that: the thickness of the supporting plate (2) is not less than 10 mm.