CN2853241Y

CN2853241Y - Thin plate bit

Info

Publication number: CN2853241Y
Application number: CN 200520037904
Authority: CN
Inventors: 徐洁媛
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-12-31
Filing date: 2005-12-31
Publication date: 2007-01-03
Anticipated expiration: 2015-12-31

Abstract

The utility discloses a sheet drill bit, comprising a drill tail, a bore rod, a cutting head, wherein a screw thread mounting hole is positioned in the drill tail, a cooling water hole is arranged in the drill rod and cutting head, the axial trace of the cooling water hole and the axial trace of the drill rod reciprocally tilt, the lower outlet hole of the cooling water hole is eccentrically positioned on the lower end face of the cutting head, thereby being easy for cooling water flowing from the cooling water hole under centrifugal force. In addition, the cooling water hole is eccentrically positioned relative to cutting head, thereby making the cooling water easily flow from the cooling water hole under centrifugal force in the drill operating process.

Description

A kind of Thin board drilling bit

Technical field

The utility model relates to a kind of Thin board drilling bit, particularly a kind of Thin board drilling bit that uses on stone material, wood-based plate.

Background technology

Cooling water hole on the existing Thin board drilling bit is generally eccentric orfice, open up drill as No. 99319002.2 disclosed stone material of Chinese patent, pottery, because the shaft of this class drill bit is thinner, and cooling water hole must have certain aperture, therefore this class drill bit is adding man-hour, cooling water hole is easy to pass from drill bit shaft side, and drill bit is scrapped.

The utility model content

At the defective that existing Thin board drilling bit exists, the purpose of this utility model provides the Thin board drilling bit of a kind of convenient processing, good cooling results.

For achieving the above object, a kind of Thin board drilling bit of the utility model, comprise and bore tail, drilling rod, cutting head, bore tail and be threaded pilot hole, have cooling water hole in drilling rod and the cutting head, the axis of the described relatively drilling rod of the axis of described cooling water hole is obliquely installed, and the lower end delivery port of cooling water hole is eccentrically set on the cutting head lower surface, and links to each other with rhone.

Further, link to each other with the screw thread pilot hole by taper water guide face on the described cooling water hole.

Further, described brill tail screw thread pilot hole comprises smooth locating hole section and thread segment, and this smooth locating hole section is concentric with described drilling rod.

Further, the truncated cone-shaped of described cutting head for being made into integration with drilling rod, its outer surface has hard cutting particle, and the rhone on the cutting head lower surface is netted or radially distributes around the water spray aperture.

Because the axis of the cooling water hole of the utility model Thin board drilling bit and the axis of described drilling rod tilt mutually, the lower end delivery port of cooling water hole is eccentrically set on the cutting head lower surface, it is dirty that cooling water is easy to from cooling water hole under action of centrifugal force, make cooling water hole be difficult for stopping up, and cooling water hole exports, and relative cutting head is eccentric to be provided with, in the drill bit course of work, cooling water is easy to flow out from the cooling water hole outlet under action of centrifugal force, guarantees that cutting head obtains continuing cooling.After in boring the screw thread pilot hole of tail, increasing smooth locating hole section, make concentric being guaranteed of drill bit and rig power delivery, overcome the defective that in the past only relies on screw thread to assemble to be easy to cause drill bit and rig delivery off-centre.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is that the A-A of Fig. 1 is to cutaway view;

Fig. 3 is a upward view of the present utility model.

The specific embodiment:

Among the embodiment 1, cutting head 3 is a truncated cone-shaped as shown in Figure 1, 2, is made into integration with drilling rod 2.The screw thread pilot hole that is complementary with rig that bores in the tail 1 is made of smooth locating hole section 4 and screwed hole section 5, wherein smooth locating hole section 4 is concentric with drilling rod 2 and cutting head 3, cooling water hole 7 upper ends link to each other with the screw thread pilot hole by taper water guide face 6, and the axis of the axis of cooling water hole 7 and drilling rod 2 tilts mutually, the lower end delivery port 8 of cooling water hole 7 is eccentrically set on cutting head 3 lower surfaces, have the hard material layer 9 that constitutes by diamond particles on cutting head 3 outer surfaces, rhone 10 on its lower surface is netted, radially distribute as shown in Figure 3, or around the water spray aperture.

During use, when passing through screwed hole section 5 and the rig clutch end links to each other, smooth locating hole section 4 is guaranteed the axiality of drill bit and rig clutch end.Taper water guide face 6, effect under, when cooling water flowed into cooling water hole 7 from screw thread pilot hole section, the resistance that is subjected to was very little.

Be subjected to the restriction of accuracy of screw machining, only rely on assembling screw thread 5 can not make drill bit and rig output reach well concentric, and after smooth locating hole section 4 is set, because of its machining accuracy is guaranteed, also just guaranteed the assembly precision of drill bit and rig output, thereby drill bit is realized with rig well concentric.

Claims

1. Thin board drilling bit, comprise and bore tail, drilling rod, cutting head, bore tail and have the screw thread pilot hole that is complementary with rig, have cooling water hole in drilling rod and the cutting head, it is characterized in that, the axis of the described relatively drilling rod of the axis of described cooling water hole is obliquely installed, and the lower end delivery port of cooling water hole is eccentrically set on the cutting head lower surface, and links to each other with rhone.

2. Thin board drilling bit according to claim 1 is characterized in that, described cooling water hole upper end links to each other with the screw thread pilot hole by taper water guide face.

3. as Thin board drilling bit as described in the claim 2, it is characterized in that described brill tail screw thread pilot hole comprises smooth locating hole section and thread segment, this smooth locating hole section is concentric with described drilling rod.

4. as Thin board drilling bit as described in the claim 3, it is characterized in that, the truncated cone-shaped of described cutting head for being made into integration with drilling rod, its outer surface has hard cutting particle, and the rhone on the cutting head lower surface is netted or radially distributes around the water spray aperture.