CN2710859Y

CN2710859Y - Woodworking plate-blade drill

Info

Publication number: CN2710859Y
Application number: CN 200420081008
Authority: CN
Inventors: 张国林
Original assignee: SHANGHAI HUALING TOOL FACTORY
Current assignee: SHANGHAI HUALING TOOL FACTORY
Priority date: 2004-07-22
Filing date: 2004-07-22
Publication date: 2005-07-20
Anticipated expiration: 2014-07-22

Abstract

The utility model relates to a woodworking plate-blade drill used for the hold drilling of the nonmetallic material, such as the wood and the plastic, comprising a drill tip, a circumferential cutting edge, a main cutting edge, a crumb discharging slot, a drill rod and a drilling handle. The utility model is characterized in that the cross section of the back cutter surface of the main cutting edge is step shape. The utility model has the advantages of sharp edge, low resistance on the axial direction of hole drilling, uneasy heating of the drill head, long service life, narrow grinding surface in processing, high working efficiency and low cost.

Description

Carpenter's flat-wing driller

Technical field

The utility model relates to a kind of carpenter's flat-wing driller, can be used for the boring of nonmetallic materials such as timber, plastics, belongs to the carpenter technical field.

Background technology

Used carpenter's flat-wing driller is made up of apex point, circumference cutting edge, main cutting edge, flute, drilling rod, drillstock at present, apex point places the center of drilling rod front end face, the cylindrical place of drilling rod front end face is equipped with the circumference cutting edge, the centre of drilling rod front end face, the both sides of apex point are equipped with two main cutting edges respectively, the front of main cutting edge is a flute, and drillstock places the rear end of drilling rod.The cross section of knife face is a broken line shape behind two main cutting edges of this carpenter's flat-wing driller, as shown in Figure 1, perhaps be linear, as shown in Figure 2, the relief angle α of knife face is little behind the main cutting edge of broken line shape, cutting edge is not sharp, drilling performance is poor, but it is narrow to add the man-hour grinding face, and stock removal is little, the working (machining) efficiency height, cost is low; The relief angle α of knife face is big behind the rectilinear main cutting edge, and cutting edge is sharp, and drilling performance is good, but it is wide to add the man-hour grinding face, the grinding difficulty, and working (machining) efficiency is low, the cost height.

Summary of the invention

The purpose of this utility model is that a kind of both cutting edges of invention are sharp, and drilling performance is good, and it is narrow to add the man-hour grinding face again, working (machining) efficiency height, carpenter's flat-wing driller that cost is low.

For realizing above purpose, the technical solution of the utility model provides a kind of carpenter's flat-wing driller, is made up of apex point, circumference cutting edge, main cutting edge, flute, drilling rod, drillstock, it is characterized in that, the cross section of the back knife face of main cutting edge is a stairstepping.

It is stairstepping that the utility model adopts the cross section of the back knife face of main cutting edge, the relief angle of knife face can keep behind the rectilinear main cutting edge relief angle α of knife face equally big behind the main cutting edge, cutting edge is sharp, drilling performance is good, and that notch cuttype can keep behind the main cutting edge of broken line shape nose angle to add the man-hour grinding face is narrow, stock removal is little, the work efficiency height, and cost hangs down advantage.

The utility model has the advantages that cutting edge is sharp, axial resistance is little during boring, and drill bit is difficult for heating, long service life, and it is narrow to add the man-hour grinding face, the work efficiency height, cost is low.

Description of drawings

Fig. 1 is a knife face schematic diagram behind the main cutting edge of broken line shape;

Fig. 2 is a knife face schematic diagram behind the rectilinear main cutting edge;

Fig. 3 is carpenter's flat-wing driller structural representation;

Fig. 4 is carpenter's flat-wing driller left view;

Fig. 5 is a knife face schematic diagram behind the step-like main cutting edge.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

Embodiment

Shown in Fig. 3,4, be carpenter's flat-wing driller structural representation, described carpenter's flat-wing driller is made up of apex point 1, circumference cutting edge 2, main cutting edge 3, flute 4, drilling rod 5, drillstock 6.

Apex point 1 is the rectangular pyramid of a protrusion, place the center of drilling rod 5 front end faces, the cylindrical place of drilling rod 5 front end faces is a circumference cutting edge 2, the centre of drilling rod 5 front end faces, the both sides of apex point 1 are respectively equipped with two main cutting edges 3, cross section at the back knife face of main cutting edge 3 is processed as stairstepping 7, as shown in Figure 5, the front of main cutting cutter 3 is a flute 4, and drillstock 6 places the rear end of drilling rod 5.

During work, drilling rod 5 is clamped in the drill chuck of drilling machine or electric hand drill, carpenter's flat-wing driller and drilling machine or electric hand drill are combined as a whole, apex point 1 is aimed at by the boring center, started drilling machine or electric hand drill, transmit the power torque of drilling machine or electric hand drill, apply axial force, circumference cutting edge 2 is contact material in advance, and marks a circle on material, along with the feeding of carpenter's flat-wing driller, circumference cutting edge 2 cuts off along this bundle of circles material, make the smooth no burr of aperture and hole wall, follow two main cutting edge 3 contact materials, material removal in the circle, form a circular hole, because the cross section of the back knife face of main cutting edge 3 is processed as stairstepping 7, cutting edge is sharp during cutting, and axial resistance is little during boring, drill bit is difficult for heating, and it is narrow to add the man-hour grinding face, the work efficiency height, and the material that cuts is outside flute 4 taps.

Claims

1. carpenter's flat-wing driller is made up of apex point (1), circumference cutting edge (2), main cutting edge (3), flute (4), drilling rod (5), drillstock (6), it is characterized in that, the cross section of the back knife face of main cutting edge (3) is stairstepping (7).