CN2101742U - Seizing-proof rock-drill bit - Google Patents

Abstract

The utility model discloses a seizing-proof rock-drill bit, comprising a water hole, a powder discharging groove, a large hole, a clearance angle, alloy sheets, and an outer spiral groove which are processed on the bit pants. The seizing-proof rock-drill bit is used for the mining or heading advance. When the drill process encounters stemming, the stemming can be directly discharged via the shearing of the turning outer spiral groove of a drill rod and the stemming inside the hole for avoiding and reducing the loss of the drill tools. The utility model has the advantages of improving the labor intensity of workers, economizing the auxiliary time of the rock drilling, improving work efficiency, and reducing cost; the utility model is one tool for speeding up the drilling speed, ensuring the quality of the drill hole, and lengthening the service life of the drill bit.

Description

Seizing-proof rock-drill bit

The utility model is a kind of Seizing-proof rock-drill bit, and it relates to machine tool class technical field, is applicable to a kind of novel bore bit that prevents the card pricker in mining, the tunnelling.

Mono-line bit, cruciform bit, Columnar tooth drill rod head and the three sword bore bits of using in mining, the tunnelling etc. all are to constitute by being processed with macropore, sludge groove, clearance angle and hydrophthalmia etc. on hard metal tip and the pricker trousers at present, in use bore bit creeps into the drill steel revolution, and rock dust is discharged by the pressure of hydrophthalmia mesohigh water.These bore bits are on shape and structure, for preventing that the card haptotaxis from can still have shortcoming, especially a word pricker is when broken or rock stratum smashed to pieces Drilling deep hole, card pricker rate is up to 15～30%, simultaneously when moving back pricker, bore bit often by the rock slag, fall things such as piece and block and move back to come out, sometimes drill steel all can not withdraw from fully, cause card to lose phenomenon, it is big that this bore bit exists the waste of bore bit, drilling tool, becomes that porosity is low, the waste in man-hour is big, the rock drilling progress is slow and the big gun hole does not reach designing requirement and cause shortcoming such as demolition effect difference.

The purpose of this utility model provides a kind of Seizing-proof rock-drill bit, uses this bore bit can play the effect that prevents the card pricker, and can improve drilling quality and rock penetration performance, alleviate the operator labour intensity, guarantee demolition effect.

Design of the present utility model is achieved in that as shown in Figure 1 this bore bit is to be made of pricker trousers (1), alloy sheet (2), is processed with hydrophthalmia (3), sludge groove (4), macropore (5), external spiral groove (6) and clearance angle (7) on the pricker trousers.

Wherein pricker trousers (1) are to process with steel, alloy sheet (2) is the new material Z series mine hard alloy of welding-on at the bore bit body, it has higher toughness and abrasion resistance, its size changes with the drill bit diameter size, be drilled with the hydrophthalmia (3) of 2～5 φ 4～6mm on the pricker trousers (1), the eye macropores (5) dark and on the pricker trousers communicate, and with pricker trousers main shaft angled (Fig. 2).The position of external spiral groove (6) is the reduced diameter portion at the bore bit body, and its length changes to some extent with the diameter of bore bit, and generally at 25～30mm, the degree of depth is 3～4mm, rectangle or arc section.External spiral groove is evenly distributed on bore bit outer round surface (Fig. 2), and certain lift angle (Fig. 1, Fig. 4) is arranged, and macropore (5) has internal thread or do not have internal thread to form certain tapering in order to be connected with drill steel and to bore, and is to decide according to different types of attachment.The distribution of sludge groove and quantity are according to the type of bore bit and fixed, generally are 2～4, and simultaneously, the size of 2～3 clearance angles also changes with the bore bit type.

Effect of the present utility model is: use this bore bit in drilling process, if run into obstruction in the hole, can be by means of the revolution of drill steel, obstruction is directly sheared in external spiral groove and the hole, obstruction is broken discharges with water, or make and fall block reset or displacement in the hole wall, prevent or reduce the purpose that the drilling tool card loses thereby reach.Add the bore bit body and have three sections clearance angles, dwindle the contact surface of bore bit and hole wall in the drilling process, the anti-sticking better effects if, card pricker rate can reduce more than 50%.Same minor diameter bore bit is dialled pricker very easily in the shallow bore hole rock drilling, especially more can embody its advantage during inclined hole under the Drilling, has improved labor strength, has saved rock drilling non-cutting time, has improved rock penetration performance.While choose reasonable alloy sheet quantity, promptly adopt three sword type bore bits (minor diameter bore bit be a word pricker except), having overcome the big gun hole that mono-line bit digs out, circle is not straight, the defective of easily blocking pricker, and saved the hard metal tip consumption than cruciform bit again, structure is more easy.

Because adopted new material Z series mine hard alloy, this alloy sheet toughness is good, is difficult for fragment when creeping into, service life of the bits is long, and the alloy wear-resisting height reduces mill pricker number of times, total footage height, rate of penetration are fast, and drilling quality is good, has improved the comprehensive technology economic indicator.

Fig. 1 is the structure chart of the utility model Seizing-proof rock-drill bit.

Fig. 2 is the sectional view of the utility model Fig. 1.

Fig. 3 is the vertical view of the utility model Fig. 1.

Fig. 4 is the sectional view of the utility model external spiral groove (6).

Fig. 5 is that enlarged drawing cuts open in the utility model macropore (5) internal thread office.

The embodiment of the utility model Seizing-proof rock-drill bit is:

Embodiment one

Processing WL-70-B ₃During the type bore bit, at first with the alloy steel (40C of φ 75 _rOr 40C _rMOV) be sawn into the long cylinder of 135mm, to make its length be 130mm to planar end surface on lathe, bore macropore (5), the aperture is φ 28mm, dark is 75mm, again at the lathe pricker trousers blank of getting on the bus, go out three taperings (7) by figure requirement car, i.e. clearance angle, its size is respectively 5 °, 19 °, 2 ° 30 ', and in macropore (5) left-hand thread of car M12, mill alloy film trap and sludge groove, the alloy film trap is of a size of 30 * 16 * 14mm, and the hydrophthalmia (3) that bores φ 6mm has 4 (Fig. 3), its degree of depth should communicate with macropore, the extended line of center line of eye intersects on the center line of pricker trousers (Fig. 2), mills external spiral groove (6) at last, and groove depth is 4mm, wide is 6mm, its position is at the reduced diameter portion of pricker trousers (Fig. 1), and becomes 12 five equilibriums to be uniformly distributed in the periphery (Fig. 4) of pricker trousers cross section, becomes 15 ° of directions tilt (Fig. 1) with vertical simultaneously, after processing, bore bit, makes its HR through the heat treatment of proper temperature _CReach 30 degree, descaling, give again earlier through surface-treated new material Z series mine alloy sheet (its be of a size of 30 * 16 * 20mm) in coreless induction furnace under the proper temperature welding-on in the alloy groove, after wax is boiled in polishing, can arrive the mine and use.

Embodiment two

Activities with embodiment one can be processed WL-42-A ₁The type bore bit, different is that each bore bit has only a slice carbide alloy, and the diameter of bore bit is φ 42mm, and steel can be steel No. 45, and hydrophthalmia is to become 54 in the both sides of pricker trousers with its center line

Diameter is φ 5mm on the direction, and the pricker trousers have only two clearance angles, and macropore does not have internal thread and is with tapering.

Claims (5)

1, a kind of Seizing-proof rock-drill bit is formed by being processed with hydrophthalmia (3), sludge groove (4), macropore (5), clearance angle (7) and alloy sheet (2) on the pricker trousers (1), it is characterized in that pricker trousers periphery is processed with external spiral groove (6).

2,, it is characterized in that external spiral groove is evenly distributed on the periphery of bore bit, and certain lift angle is arranged according to claim 1 described Seizing-proof rock-drill bit.

3,, it is characterized in that the external spiral groove depth is rectangle or the arc section of 3～4mm according to claim 1 described Seizing-proof rock-drill bit.

4,, it is characterized in that it being to adopt new material Z series mine alloy sheet according to claim 1 described Seizing-proof rock-drill bit.

5,, it is characterized in that clearance angle is three sections according to claim 1 described Seizing-proof rock-drill bit.

Images