CN2557526Y

CN2557526Y - Integral ball-tooth type drill

Info

Publication number: CN2557526Y
Application number: CN 02236362
Authority: CN
Inventors: 许立力
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-05-27
Filing date: 2002-05-27
Publication date: 2003-06-25
Anticipated expiration: 2012-05-27

Abstract

The utility model relates to a drill bit of a high temperature material borehole, in particular to a drill bit for opening a molten iron port of a blast furnace. The utility model includes a head portion and a rod portion, wherein, teeth are arranged on the end face and the cylindrical surface of the head portion, the teeth on the end face are edge teeth and middle teeth, an axial air hole is also disposed on the end face, and an axial air hole communicated with the air hole of the head portion is arranged on the rod portion. The utility model is characterized in that the edge teeth on the end face adopt the warhead teeth, the middle teeth adopt the teeth with edges, the edge teeth and the middle teeth have the same material with the head portion and the rod portion, which are combined into a whole, the air hole on the end face is a horn-shaped flat hole, and the area of section of a discharge groove between teeth on the cylindrical surface of the head portion is enlarged. The utility model has advantages of fast drilling speed, smooth power discharging, sleek borehole wall, simple making and low material cost, and is the new generation product of the drill bit for opening the molten iron port of the blast furnace.

Description

Whole ball flute profile drill bit

(1), technical field

The utility model relates to the drill bit that the drill bit, particularly the blast furnace open mouth of a river of the boring of a kind of high temperature material are used.

(2), background technology

At present, the drill bit used of the blast furnace open mouth of a river has many employing rock drilling sintered carbide ball teeth drill bits.Its heel teeth is the hemisphere tooth, and middle tooth is the bullet tooth, because middle tooth does not have sword, so drilling speed is slow.Maximum tooth is apart from less than 20 millimeters, and is slow for lead plug high temperature soft material drilling speed.The ditch is that sludge groove is 2～3 invaginating arc ditches or ditch, plane, because the cross section of sludge groove is less, so chip removal is difficult, and weak heat-dissipating, temperature rise is fast, and intensity reduces fast, and the life-span is short.The water hole diameter is that hole diameter has only 4～5.5 millimeters, though there are 2～4, be used for exhaust, and the aperture is too little, so cooling-down effect is poor.Teeth material is a Wimet, and not only material is expensive, and manufacturing procedure is many, makes its cost higher.

(3), summary of the invention

Existing drill bit is yielding in order to overcome, burnt molten deficiency during blast furnace open hole, the utility model provides a kind of whole ball flute profile drill bit, this drill bit is not only burnt molten when the blast furnace opening, and lead plug speed is fast, realizes reducing the time that drills through the molten iron place fast.

The technical scheme that its technical problem that solves the utility model adopts is: it comprises head and bar portion, wherein on the end face of head and the cylindrical surface tooth is arranged, tooth on the end face has heel teeth and middle tooth, also has axial pore on the end face, the axial pore that communicates with the pore of head is arranged in the bar portion, the diameter of bar portion is less, be 0.4～0.7 times of head outer diameter, adopt the round platform transition between head and the bar portion, it is characterized in that: the heel teeth on the described end face adopts the bullet tooth, middle tooth adopts band sword tooth, help cutting material, improve drilling speed, heel teeth and middle tooth and head and bar portion are an integral body of same material, can adopt the die forging once shaped, technology is simple, pore on the described end face is a horn-like flat hole, helps better air-out and heat radiation, and it can not softened too early, thereby one gets into the end, get through molten iron, the sludge groove sectional area between the tooth on the described head cylindrical surface increases, and is 2～5 times of prior art, the utmost point is beneficial to chip removal and heat radiation, increase drilling speed, reduce temperature and give birth to speed, make it keep hardness.

Material of the present utility model is 45# steel or other medium carbon steel steel alloy.

The utility model compared with prior art has following advantage:

1, drilling speed is fast, is 1.2-1.5 times of inserted drill.

2, because adopt big junk slot, so row's powder is unobstructed, the boring circle is straight, and hole wall is smooth, is beneficial to out molten iron.

3, drill bit is whole to be welded with drilling rod if take, and then moving back the brill resistance can reduce, and more helps moving back brill, increases safety coefficient.

4, at the bottom of the material cost, only, a large amount of Hardmetal materials have been saved with 45# steel or other medium carbon steel.

5, make simply, adopt die-forging forming, saved material, saved the precision work expense without precision work.

6, the macroeconomic cost only reaches now the extensively 1/3-1/5 of the cross inserted drill of usefulness.

(4), description of drawings

Fig. 1 is the utility model front view;

Fig. 2 is the utility model left view;

Fig. 3 is the A-A sectional view among the utility model Fig. 1;

Fig. 4 is the B-B sectional view among the utility model Fig. 1;

Fig. 5 is the C-C sectional view among the utility model Fig. 2;

Fig. 6 is the D-D sectional view among the utility model Fig. 2.

(5), embodiment

The utility model comprises head 1 and bar portion 3, as shown in Figure 1.Wherein on the end face of head 1 and the cylindrical surface tooth is arranged, the tooth on the end face has heel teeth 4 and middle tooth 5,6, also has axial pore on the end face, as shown in Figure 2.The axial pore 7 that communicates with the pore of head 1 is arranged in the bar portion 3, and the diameter of pore 7 is 10～16 millimeters, is 2～4 times of prior art.The diameter of bar portion 3 is less, is 0.4～0.7 times of head 1 external diameter, adopts round platform 2 transition between head 1 and the bar portion 3.Heel teeth 4 on the described end face adopts 5, all is the bullet tooth.Middle tooth 5,6 has two, lays respectively at the both sides of pore 7, adopts band sword tooth, helps cutting material, improves drilling speed, shown in Fig. 5,6.Heel teeth 4 and middle tooth 5,6 and head 1 and bar portion 3 are a single piece of same material, can adopt the die forging once shaped, and technology is simple.Described pore 7 is a horn-like flat hole 10 in head 1 part, helps better air-out and heat radiation, and it can not softened too early, thereby one gets into the end, gets through molten iron, as shown in Figure 3.Sludge groove 8 sectional areas between the tooth 9 on described head 1 cylindrical surface increase, and are 2～5 times of prior art, and the utmost point is beneficial to chip removal and heat radiation, increase drilling speed, reduce temperature rise speed, make it keep hardness.Material of the present utility model is 45# steel or other medium carbon steel steel alloy.

Claims

1, a kind of whole ball flute profile drill bit, it comprises head (1) and bar portion (3), wherein on the end face of head (1) and the cylindrical surface tooth is arranged, tooth on the end face has heel teeth (4) and middle tooth (5,6), also has axial pore on the end face, the axial pore (7) that communicates with the pore of head (1) is arranged in the bar portion (3), the diameter of bar portion (3) is less, be 0.4～0.7 times of head (1) external diameter, adopt round platform (2) transition between head (1) and the bar portion (3), it is characterized in that: the heel teeth on the described end face (4) adopts the bullet tooth, middle tooth (5,6) adopt band sword tooth, heel teeth (4) and middle tooth (5,6) be an integral body of (3) same material with head (1) and bar portion, pore on the described end face is a horn-like flat hole (10), sludge groove (8) sectional area between the tooth (9) on described head (1) cylindrical surface increases, and is 2～5 times of prior art.

2, drill bit according to claim 1 is characterized in that: the diameter of pore (7) is 10～16 millimeters.

3, drill bit according to claim 1 is characterized in that: material of the present utility model is 45# steel or other medium carbon steel steel alloy.