CN102059376A

CN102059376A - Cylindrical hollow drilling tool

Info

Publication number: CN102059376A
Application number: CN 201010595071
Authority: CN
Inventors: 杨清韩
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-15
Filing date: 2010-12-15
Publication date: 2011-05-18

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

A kind of cylinder hollow boring bar tool

Technical field

The present invention relates to a kind of boring bar tool, relate in particular to a kind of once-forming cylinder hollow boring bar tool.

Background technology

The occasion that needs the T type to connect at stainless steel pipe balustrade etc., bottom square tube or pipe are to the connection construction of main handrail pipe, be that blank area to bottom square tube or pipe carries out being docked on the cylinder of main handrail pipe after the smear metal processing, owing to there is not the on-the-spot special-purpose hand-held or disposable forming tool of small desk, its material toughness is strong in addition, mostly adopt the cutting machine cut-away to divide tubing to form certain angle when causing construction, be polished into a series of process such as required circular shape again, to such an extent as to long processing time, cutting machine incising pipes process poor stability, the shape that processes does not reach requirement, and it is attractive in appearance that the welding back connects the excessive influence in slit.

Summary of the invention

Purpose of the present invention is exactly in order to address the above problem, provide a kind of and can be used for cylinder hollow boring bar tool hand-held or that small desk bores, this instrument can once get out the circular arc or the circle of required size, and shock resistance is good, the intensity height, anti-breaking, air pollution is little, carry light and flexible, safe and reliable.

The present invention realizes like this.

A kind of cylinder hollow boring bar tool comprises drillstock, bore body, lower gasket, screw screw, brill is as the cylinder hollow structure, boring the body bottom is the circular hollow chip surface, needs according to the on-the-spot processing of practice of construction tubing, bore the radius size R=20mm～150mm of body circular hollow chip surface, and the security during for the intensity that guarantees boring bar tool and cutting, bore the radius R of body cylinder circular hollow chip surface and the ratio R of boring the cylindrical high H of body: the H range of choice is 1: 2 to 1: 5, selects R: H=1 usually: 3, the brill body is an installed surface, the drillstock installing hole is left at the installed surface center, and the drillstock head adopts the existing general clamp structure of drill bit, makes it to cooperate hand-held or desk-top drilling tool, the drillstock afterbody passed bore the body installed surface, by lower gasket with screw screw and be fixed into an integral body.

For guaranteeing to bore body shock resistance and intensity, boring body making structure is three layers, and outer and internal layer is the emery wheel layer, the intermediate layer is the glass fiber mesh compartment, and production material outer and internal layer comprises silicon carbide abrasive, powdered phenol-formaldehyde resin, the high strength carbon black, tri-iron tetroxide.Four kinds of material mixture ratio ratios are as follows: carborundum 65%～75%, phenolic resins 15%～25%, high strength carbon black 0.3%～1%, tri-iron tetroxide 5%～15%.The composition of fiberglass gridding cloth is an alkali-free glass fibre, and thickness is selected 260u m～300u m.Carborundum, phenolic resins, high strength carbon black, tri-iron tetroxide are stirred into the compound with shaping in proportion, in-5 ℃～-10 ℃ environment, half material is filled in the mould, extrusion molding, fiberglass gridding cloth is attached on the inwall of drawing, fills second half material, mould is put into hydraulic press, extruding kept 2 minutes in 80 ℃～90 ℃ temperature environments, put it into after taking apart a die in the curing oven and can obtain finished product after the curing.

Beneficial effect

The invention has the beneficial effects as follows, by the above-mentioned cylinder hollow boring bar tool of producing, it is good to have shock resistance, intensity height, anti-breaking, characteristics such as air pollution is little, the on-the-spot light and flexible of using, safe and reliable, can disposablely shape, improve production efficiency greatly, shortened the process-cycle.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 structural representation of the present invention.

Fig. 2 assembling section of the present invention.

The specific embodiment

As Fig. 1, the hollow of cylinder shown in Fig. 2 boring bar tool comprises drillstock 1, bore body 2, lower gasket 3, screw screw 4, when job site processing tubing radius R is 50mm, bore body 2 chip surface radius size R and also select 50mm, bore body 2 cylindrical height H and select 150mm, drillstock 1 afterbody is passed the installed surface that bores body 2, lower gasket 3 is pierced into drillstock 1 bottom be in the part of boring body 2 inside, use screws screw 4 and screws, be fixed into a cylinder hollow boring bar tool, drillstock 1 head adopts the existing general clamp structure of drill bit, makes it to cooperate hand-held or desk-top drilling tool, by the high speed rotation of hand-held or desk-top drilling tool, drive brill body 2 and rotate smear metal tubing at a high speed, but the required circular arc of once-forming, desk-top drilling tool anchor clamps auxiliary down, but also once-forming has the circular arc at angle of inclination.

In the production of boring body, during for brill body R=50mm, this moment, production technology raw material proportioning adopted carborundum 71%, phenolic resins 18%, high strength carbon black 1%, tri-iron tetroxide 10%.The composition of fiberglass gridding cloth is an alkali-free glass fibre, and thickness is selected 280um.Carborundum, phenolic resins, high strength carbon black, tri-iron tetroxide are stirred into the compound with shaping in top ratio, in-8 ℃ of environment, half material is filled in the mould, extrusion molding is attached to fiberglass gridding cloth on the inwall of drawing, fills second half material, mould is put into the inherent 85 ℃ of temperature environments extruding of hydraulic press to be kept 2 minutes, put it into after taking apart a die in the curing oven, adopt curing process commonly used promptly curable, can obtain finished product after the curing.

Claims

1. a cylinder hollow boring bar tool comprises drillstock, bores body, lower gasket, screw screw, it is characterized in that: bore as the cylinder hollow structure, boring the body bottom is the circular hollow chip surface, the drillstock afterbody with bore body by lower gasket with screw screw and be fixed into an integral body.

2. a kind of cylinder hollow boring bar tool according to claim 1 is characterized in that: the radius R size Selection scope of boring body circular hollow chip surface is 20mm～150mm.

3. a kind of cylinder hollow boring bar tool according to claim 1 is characterized in that: boring the radius R of body circular hollow chip surface and the ratio range of the high H that bores the Shenzhu body is 1: 2 to 1: 5.

4. a kind of cylinder hollow boring bar tool according to claim 3 is characterized in that: bore the radius R of body circular hollow chip surface and the ratio R of boring the high H of Shenzhu body: H=1: 3.

5. a kind of cylinder hollow boring bar tool according to claim 1 is characterized in that: bore body structure and be divided into outer emery wheel layer, three layers on intermediate glass fleece compartment and interior emery wheel layer.

6. a kind of cylinder hollow boring bar tool according to claim 5, it is characterized in that: inside and outside emery wheel layer proportioning adopts carborundum 65%～75%, phenolic resins 15%～25%, high strength carbon black 0.3%～1%, tri-iron tetroxide 5%～15%, the composition of intermediate glass fleece compartment fiberglass gridding cloth is an alkali-free glass fibre, and thickness is selected 260um～300um.