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Special drill bit for tapered hole and application method of tapered hole

A drill bit and tapered hole technology, which is applied in anchoring technology and bar planting technology, and the field of anchor hole drill bits, can solve the problems of special drill bits without tapered holes, no technology, and no tapered holes, etc., to improve pre-tightening force and improve Strength, the effect of improving firmness

Inactive Publication Date: 2010-07-14
贵州怡力市政建筑装饰工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there are no related patents on special drills for tapered holes, no related patents on the application of tapered holes, and no reports on related technologies

Method used

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  • Special drill bit for tapered hole and application method of tapered hole
  • Special drill bit for tapered hole and application method of tapered hole
  • Special drill bit for tapered hole and application method of tapered hole

Examples

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Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: as figure 2 The special drill bit for tapered holes is composed of drill shank 1, blade face 2, positioning ring 6 and flexible limit ring 5. The drill handle 1 and blade face 2 are made as a whole; the positioning ring 6 and flexible limiter 5 are also made as As a whole, it is set on the drill shank 1; the angle between the outer edge of the blade surface 2 and the axis of the drill bit is an acute angle of 20°; The blade edge 4 has serrations 3 and is made of Yg11 alloy steel. Drill shank 1 diameter 20mm, drill bit total length 220mm, the right-angle side length 40mm of drill bit, the hypotenuse length 100mm of blade edge 4. The drill shank 1 is made of 9CrSi alloy structural steel, and the blade surface 2 is inlaid with a Yg11 hard alloy steel blade edge 4 . Locating ring 6 and flexible limit ring 5 are made of rubber.

Embodiment 2

[0021] Embodiment 2: as figure 2 The special drill bit for taper holes, the blade edge 4 has no serrations, the drill shank 1 is made of 40Cr steel, and the positioning ring 6 and the flexible limit ring 5 are made of rubber and plastic materials. All the other are with embodiment 1.

Embodiment 3

[0022] Embodiment 3: The application of tapered holes in anchoring technology. The base material 10 is concrete, and a tapered anchor hole is drilled with a special drill bit for tapered anchor holes on the concrete. The length of the tapered hole is 16 mm, and the diameter of the tapered hole inlet is 2 mm. Shape bottom diameter 4mm, such as image 3 ;Use the expansion-type special anchor bolt 7 with the nylon sleeve 8, and the appearance of the nylon sleeve 8 has ribs; press the expansion-type special anchor bolt 14 with the nylon sleeve 8 into the tapered anchor hole to make it expand The formed geometric shape coincides with the tapered anchor hole, and the surface of the anchor bolt 7 is closely combined with the tapered hole to play an anchoring role. There is a nut 13 on the top of the anchor bolt 7 .

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Abstract

The invention discloses a special drill bit for a tapered hole and an application method of the tapered hole. The special drill bit for the tapered hole consists of a drill handle, a blade face, a positioning ring and a flexible limit ring, wherein the drill handle and the blade face are integrated as a whole; the positioning ring and the flexible limit ring which are also integrated as a whole are sleeved on the drill handle; the included angle formed by the outer line of the blade face and the axial line of the drill bit is an acute angle; and the blade face is embedded with a semi-spiral blade edge, and the top end of the blade edge is a blade tip. The application method comprises the following steps: (1) pressing an expansion type special anchor bolt with a nylon sleeve into a tapered anchor bolt hole, so that the geometry formed after expansion of the expansion type special anchor bolt is matched with the tapered anchor bolt hole, and the surface of the anchor bolt can be tightly combined with the tapered hole to achieve anchoring effect; (2) drilling an opening on the root part of a required rib, inserting the rib into a tapered bar planting hole, expanding the opening of the rib with a wedge to form a tapered shape, and injecting anchor adhesive, so that the bar planting surface and the tapered hole can be tightly combined after solidification. The tapered hole drilled by the drill bit of the invention can significantly improve the anchorage strength and the bar planting solidity, and greatly enhance the pre-tightening force, bearing capacity, pull-out resistance and tensile bearing capacity of anchors or planted bars.

Description

technical field [0001] The present invention relates to a tool for drilling, and also relates to an anchoring technique and a bar planting technique, in particular to a drill bit for an anchor hole and an application method of the subsequent anchoring technique or bar planting technique. Background technique [0002] As we all know, anchoring is to fix the anchor bolt in the anchor hole, and post-anchor is the technology of anchoring the anchor bolt on the concrete structure. In order to prevent damage such as anchor bolt damage, concrete cone damage, concrete edge damage, shear pry damage, split damage, pull-out damage, penetration damage, etc. Develop new drill bits and new post-anchor and rebar techniques. There have been many related Chinese patents and patent applications, such as No. 98208074.3 "Special-shaped Drill Bit", No. 00212069.0 "An Explosive Expansion Anchor Rod", No. 03137329.1 "Anchoring Paste Brick Wall and Construction Technology after External Insulation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/42E04G21/12
Inventor 姜静怡
Owner 贵州怡力市政建筑装饰工程有限公司
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