CN214815117U - Machine-clamped split type indexable gun drill - Google Patents

Abstract

The utility model discloses a machine presss from both sides split type transposition gun drill, include: a gun drill rod; the gun drill bit is arranged on one side of the gun drill rod, chip grooves are formed in the two sides of the outer walls of the gun drill bit and the gun drill rod and are designed in an arc shape, cooling holes are formed in the gun drill rod and the gun drill bit, and the cooling holes in one side of the gun drill bit are through; carbide blade, the quantity of carbide blade is three, and fixed the setting is in one side of gun drill bit, this split type indexable gun drill of machine clamp, reducible tool changing time, protection cutter reduce use cost, through the chip groove of seting up on rifle drilling rod and gun drill head, multiplicable chip removal space makes the chip removal more smooth.

Description

Machine-clamped split type indexable gun drill

Technical Field

The utility model relates to a gun drill technical field specifically is a split type transposition gun drill of machine clamp.

Background

The application range of present gun drill is more extensive, the structural style of gun drill is basically that the pole portion is steel pipe roll forming, the head is carbide welds on the steel pipe, just need regrinding if the blade is inefficacy, long footpath pole of doubly, regrinding is more difficult, regrinding takes time long, welded type tool bit still generally has a problem exactly, easy welding is insecure, easily drops off, also can have this kind of condition when the moment of torsion is too big in the course of working, this will cause scrapping of whole pole, the finished product is high, the chip removal effect of cutter arbor is also not very ideal, general gun drill is single chip groove, double chip groove generally also can have the restriction to the material of being processed, only be fit for the material of the short iron fillings of easy chip breaking, make the chip removal have the limitation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a machine presss from both sides split type transposition gun drill to cutter easily wears out among the solution prior art, and the cutter changing time is of a specified duration after wearing and tearing, the unsatisfactory problem of chip removal effect of cutter arbor.

In order to achieve the above object, the utility model provides a following technical scheme: a split type indexable drill gun of machine clamp includes:

a gun drill rod;

the gun drill bit is arranged on one side of the gun drill rod, chip grooves are formed in the two sides of the outer walls of the gun drill bit and the gun drill rod and are designed in an arc shape, cooling holes are formed in the gun drill rod and the gun drill bit, and the cooling holes in one side of the gun drill bit are through;

the number of the hard alloy blades is three, and the hard alloy blades are fixedly arranged on one side of the gun drill head.

Preferably, the upper end and the lower end of one side of the gun drill bit are both provided with positioning columns, one side of the gun drill rod is provided with a positioning groove, the positioning columns are in adaptive insertion connection with the inner cavity of the positioning groove, the outer side of the positioning columns is provided with tensioning taper holes, the upper end and the lower end of the outer side of the gun drill rod are both provided with tensioning screws in insertion connection, and the inner sides of the tensioning screws extend into the inner cavity of the positioning groove and are in threaded connection with the inner cavity of the tensioning taper holes.

Preferably, a threaded hole is formed in one side of the inner cavity of the positioning groove, a positioning pin is screwed in the inner cavity of the threaded hole, and one side of the positioning pin is tightly attached to one side of the positioning column.

Preferably, the upper side and the lower side of the outer wall of the gun drill rod are both provided with first guide blocks, the upper side and the lower side of the outer wall of the gun drill bit are both provided with second guide blocks, and the first guide blocks and the second guide blocks are tightened on the outer walls of the gun drill rod and the gun drill bit through screws.

Preferably, the over-center cemented carbide insert is the highest in the axial direction, the middle cemented carbide insert is 0.1mm lower than the over-center cemented carbide insert, the outer cemented carbide insert is 1.3mm lower than the middle cemented carbide insert, and the over-center cemented carbide insert, the middle cemented carbide insert and the outer cemented carbide insert form included angles of 5 °, 6 ° and 1 ° respectively with respect to end faces perpendicular to the axis.

Compared with the prior art, the beneficial effects of the utility model are that: this split type transposition gun drill of machine clamp through being provided with three carbide blade to make the cutter wearing and tearing back, and reducible tool changing time, the protection cutter reduces use cost, through the chip groove of seting up on rifle drilling rod and gun drill head, multiplicable chip removal space makes the chip removal more smooth.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a left side view of the present invention;

FIG. 3 is a schematic view of the front structure of the gun drill of the present invention;

fig. 4 is a left side use diagram of the gun drill rod of the utility model.

In the figure: 1. the gun drill rod, 2, a gun drill bit, 3, a chip groove, 4, a hard alloy blade, 5, a positioning column, 6, a positioning groove, 7, a tensioning taper hole, 8, a tensioning screw, 9, a first guide block, 10, a second guide block, 11, a cooling hole, 12, a threaded hole, 13 and a positioning pin.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: a split type indexable drill gun of machine clamp includes: rifle drilling rod 1, gun drill 2, chip groove 3 and carbide blade 4, gun drill 2 sets up in one side of gun drill 1, chip groove 3 has all been seted up to the outer wall both sides of gun drill 2 and gun drill 1, and chip groove 3 is the circular arc type design, the sweeps is more smooth, cooling hole 11 has all been seted up to rifle drilling rod 1 and gun drill 2, and the cooling hole 11 that is located 2 one side of rifle drill is for lining up the form, carbide blade 4, the quantity of carbide blade 4 is three, and fixed setting is in one side of rifle drill 2.

As a preferred scheme, furthermore, the upper end and the lower end of one side of the gun drill 2 are both provided with positioning columns 5, one side of the gun drill 1 is provided with a positioning groove 6, the positioning columns 5 are inserted into the inner cavity of the positioning groove 6, the positioning columns 5 are provided with two eccentric arc surfaces on the excircle, the arc surfaces play a centering role when being assembled with a cutter bar to ensure the coaxiality of the gun drill and the gun drill, the outer side of the positioning columns 5 is provided with tensioning taper holes 7, the upper end and the lower end of the outer side of the gun drill 1 are both inserted with tensioning screws 8, the inner sides of the tensioning screws 8 extend into the inner cavity of the positioning groove 6 and are in screwed connection with the inner cavity of the tensioning taper holes 7, under the action of the tensioning screws 8, the gun drill 2 has a backward tensioning force and a downward force for enabling the gun drill 2 to rotate, the backward tensioning force is that the end surface of the gun drill 2 is tightly attached to the end surface of the gun drill 1, the downward rotating force enables the positioning columns 5 of the gun drill 2 to be attached to the eccentric arc in the positioning groove 6 of the gun drill 1, the gun drill bit 2 is in gapless fit with the gun drill rod 1 in the radial direction.

As preferred scheme, furthermore, threaded hole 12 is seted up to the inner chamber one side of constant head tank 6, and the inner chamber spiro union of threaded hole 12 has locating pin 13, and locating pin 13 one side pastes closely with one side of reference column 5, and locating pin 13 upper portion is the semicircle, and the semicircle has a plane, and the latter half is the screw thread, through in screw thread installation and the constant head tank 6 of gun drill pole 1, locating pin 13 is nimble to be rotated in the constant head tank 6 of gun drill pole 1, and the plane laminating of the side straight flange of reference column 5 and locating pin 13 comes the transmission moment of torsion.

As a preferred scheme, furthermore, the upper side and the lower side of the outer wall of the gun drill rod 1 are both provided with first guide blocks 9, the upper side and the lower side of the outer wall of the gun drill 2 are both provided with second guide blocks 10, the first guide blocks 9 and the second guide blocks 10 are tightened on the outer walls of the gun drill rod 1 and the gun drill 2 through screws, the second guide blocks 10 are lower than the circumferential cutting edge of the outer blade by 0-0.01mm and are provided with inverted tapers of 0.04-0.06mm, so that not only is the friction force of the hole wall reduced, but also a good supporting effect is achieved. The first guide block 9 in the middle of the gun drill rod 1 is additionally provided with one or more support groups when deep holes are machined, so that the drilling process is more stable.

Preferably, the over-center cemented carbide tip 4 is the highest in the axial direction, the middle cemented carbide tip 4 is 40.1 mm lower than the over-center cemented carbide tip, the outer cemented carbide tip 4 is 41.3 mm lower than the middle cemented carbide tip, the over-center cemented carbide tip 4, the middle cemented carbide tip 4 and the outer cemented carbide tip 4 respectively form included angles of 5 degrees, 6 degrees and 1 degree with the end faces perpendicular to the axial line, the height difference and the angle change of the tips play a good role in balancing the cutting force during cutting, and the machining process is more stable.

The detailed connection means is a technique known in the art, and the following mainly describes the working principle and process, and the specific operation is as follows.

The design of the whole gun drill can reach the length of 30-40 times of the diameter, when in use, a pre-drilled hole is firstly made, the diameter of the pre-drilled hole is the same as the diameter of the gun drill, the depth is about 2-3 times of the diameter, when the gun drill starts to drill, the second guide block 10 of the gun drill 2 enters the hole to play a supporting role, the long rod is prevented from swinging during processing, each angle and height difference of the hard alloy blade 4 enable the cutting to be considered in a component force manner during the cutting process, the action of an eccentric force is reduced, the cutting process is more stable, the hard alloy blade 4 is an indexable blade, four cutting edges are provided, one cutting edge can be continuously used after being worn, the whole blade fails to replace a single blade, if the gun drill fails, only the gun drill needs to be replaced, the cost of a cutter is greatly reduced, the operation time is shortened, the gun drill 2 and the gun drill rod 1 adopt arc chip grooves, the chip groove is reasonable in proportion design, scrap iron is discharged more conveniently, an inner cooling hole is designed on the gun drill, the cutting edge is protected, and the scrap iron is discharged conveniently.

In the description of the present invention, it is to be understood that the terms "top end", "bottom end", "front side", "rear side", "outer wall", "inner cavity", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation; also, unless expressly stated or limited otherwise, the terms "insert," "threaded," "secured," and "disposed" are to be construed broadly and may include, for example, a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (3)

1. The utility model provides a split type transposition gun drill of machine clamp which characterized in that includes:

a gun drill rod (1);

gun drill bit (2) sets up one side of gun drill rod (1), gun drill bit (2) with chip groove (3) have all been seted up to the outer wall both sides of gun drill rod (1), just chip groove (3) are the design of circular arc type, gun drill rod (1) with cooling hole (11) have all been seted up in gun drill bit (2), and are located cooling hole (11) of gun drill bit (2) one side are for lining up the form, both ends all are provided with reference column (5) about one side of gun drill bit (2), constant head tank (6) have been seted up to one side of gun drill rod (1), just reference column (5) with the inner chamber looks adaptation of constant head tank (6) is pegged graft, taut taper hole (7) have been seted up in the outside of reference column (5), both ends are all pegged graft about the outside of gun drill rod (1) and have taut screw (8), the inboard of taut screw (8) extend into the inner chamber of constant head tank (6) and with the inner chamber looks screw of taut taper hole (7) A threaded hole (12) is formed in one side of the inner cavity of the positioning groove (6), a positioning pin (13) is screwed in the inner cavity of the threaded hole (12), and one side of the positioning pin (13) is tightly attached to one side of the positioning column (5);

the gun drill comprises three hard alloy blades (4), wherein the number of the hard alloy blades (4) is three, and the hard alloy blades are fixedly arranged on one side of the gun drill (2).

2. The mechanically-clamped split type indexable gun drill according to claim 1, characterized in that: the upper side and the lower side of the outer wall of the gun drill rod (1) are provided with first guide blocks (9), the upper side and the lower side of the outer wall of the gun drill bit (2) are provided with second guide blocks (10), and the first guide blocks (9) and the second guide blocks (10) are tightened on the outer wall of the gun drill rod (1) and the gun drill bit (2) through screws.

3. The mechanically-clamped split type indexable gun drill according to claim 1, characterized in that: the carbide blade (4) that crosses the center is highest in the axial direction, and middle carbide blade (4) is less than the center carbide blade (4) 0.1mm, outer carbide blade (4) is less than the middle carbide blade (4) 1.3mm, crosses the center carbide blade (4), middle carbide blade (4) and outer carbide blade (4) become 5 degrees, 6 degrees and 1 degree contained angle respectively in the terminal surface perpendicular to the axis.

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