Cylindrical hollow drilling tool

Abstract

The invention relates to a cylindrical hollow drilling tool which comprises a drill stock, a drill body, a lower gasket and a tightening screw, wherein the drill body is of a cylindrical hollow structure, the lower part of the drill body is a circular hollow chipping face, the upper part of the drill body is a mounting face, a drill stock mounting hole is reserved in the center of the mounting face, and the tail part of the drill stock penetrates through the drill body mounting face; a drill is formed by fixing the lower gasket and the tightening screw, and the head of the drill stock is of a general clamping structure for the traditional drill bit so as to match a handheld or table-type drilling tool; and the drill body comprises an internal grinding wheel layer, an external grinding wheel layer and a middle glass fiber grid layer. By using the tool, a circular arc or a circle with required size can be drilled in one step. Moreover, the cylindrical hollow drilling tool has good impact resistance, high strength, rapture resistance, less air pollution, handiness and flexibility for carrying, and safety and reliability of use.

Description

technical field [0001] The invention relates to a drilling tool, in particular to a cylindrical hollow drilling tool formed at one time. Background technique [0002] In occasions where T-shaped connection is required, such as stainless steel pipe stair handrails, the connection construction of the lower square tube or round tube to the main handrail round tube is to carry out chip processing on the joint part of the lower square tube or round tube and then connect it to the main handrail round tube. On the cylindrical surface, due to the lack of on-site hand-held or small table-top disposable forming tools, and the strong toughness of the material, most of the construction uses a cutting machine to cut off part of the pipe to form a certain angle, and then polish it into a series of required arc shapes. The processing process is so long that the processing time is long, the safety of the pipe cutting process by the cutting machine is poor, the processed shape does not meet ...

AI Technical Summary

Problems solved by technology

[0002] In occasions where T-shaped connection is required, such as stainless steel pipe stair handrails, the connection construction of the lower square tube or round tube to the main handrail round tube is to carry out chip processing on the joint part of the lower square tube or round tube and then connect it to the main handrail round tube. On the cylindrical surface, due to the lack of on-site hand-held or small table-top disposable forming tools, and the strong toughness of the material, most of the construction uses a cutting machine to cut off part of the pipe to form a certain angle, and then polish it into a series of required arc shapes. The processing process is so long that the processing time is long, the safety of the cutting machine cutting the pipe is poor, the processed shape does not meet the requirements, and the connection gap after welding is too large to affect the appearance

Images