CN215998825U

CN215998825U - Special groove type drill bit capable of guaranteeing hole finish degree and roundness

Info

Publication number: CN215998825U
Application number: CN202122632067.5U
Authority: CN
Inventors: 唐超
Original assignee: Dalian Jiechao Tools Co ltd
Current assignee: Dalian Jiechao Tools Co ltd
Priority date: 2021-10-30
Filing date: 2021-10-30
Publication date: 2022-03-11
Anticipated expiration: 2031-10-30

Abstract

The utility model discloses a guarantee special cell type drill bit of hole finish circularity, connect the neck footpath including the drill bit, the right side that the neck footpath was connected to the drill bit is provided with the handle of a knife, the left side that the neck footpath was connected to the drill bit is provided with first axial relief angle and second axial relief angle respectively, the outer wall circumference that the neck footpath was connected to the drill bit is provided with main cutting ligament and vice cutting ligament respectively, the outer wall circumference that the neck footpath was connected to the drill bit has seted up polishing double circular arc type slot and interior cold guiding groove respectively. This guarantee special cell type drill bit of hole finish circularity, simple structure, reasonable in design, it can avoid drilling effectively to lead to the appearance of pore wall mar, arch, burr, succulent scheduling problem, need not follow-up processing, not only operation labour saving and time saving has improved holistic work efficiency greatly, has reduced manufacturing cost moreover, makes for holistic processing and provides very big facility, uses in a flexible way, and the practicality is strong, satisfies the user demand on the current market.

Description

Special groove type drill bit capable of guaranteeing hole finish degree and roundness

Technical Field

The utility model relates to a drilling processing technology field specifically is a special cell type drill bit of assurance hole finish circularity.

Background

In the machining industry, the machining of automobile parts, aerospace parts and oil engine and ship parts is large. The industries such as home electronics and the like all relate to hole machining, and the hole machining is divided into various machining such as hole turning, boring, hole milling, reaming, hole grinding, honing, hole expanding, drilling and the like. However, in all hole machining, it is necessary to drill a hole first to perform other processes, so that drilling is indispensable for machining and cannot be used as an alternative machining method.

At present, in the process of machining some special holes, the smoothness, roundness, cylindricity, straightness and the like of the holes need to be machined, in order to meet the requirements of related drilling, the hole needs to be machined again after drilling to ensure the drilling quality, for example, when the machined hole needs to have a smooth finish, the traditional process needs to drill the hole, obtain a reserved hole and then ream the hole, because the hole drilled by the ordinary drill bit has the problems of scratches, bulges, burrs, fleshiness and the like on the hole wall, therefore, subsequent re-machining of reaming holes is required to meet the requirements of the related technology, but the machining mode is time-consuming and labor-consuming, not only has low machining efficiency, but also increases the production cost, is not beneficial to the integral processing and manufacturing, brings much trouble to the working personnel, therefore, in view of the above disadvantages, a special fluted drill ensuring the smoothness and roundness of the hole has been proposed to improve the above.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a guarantee special cell type drill bit of hole finish circularity to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a special groove-shaped drill bit capable of guaranteeing the roundness of hole finish degree comprises a drill bit connecting neck, a cutter handle is arranged on the right side of the drill bit connecting neck, a first axial relief angle and a second axial relief angle are respectively arranged on the left side of the drill bit connecting neck, a main cutting ligament and an auxiliary cutting ligament are respectively arranged on the outer wall circumference of the drill bit connecting neck, a polishing double-arc groove and an inner cooling guide groove are respectively arranged on the outer wall circumference of the drill bit connecting neck, a double-chamfer type cutting edge is arranged at the left end of the drill bit connecting neck, a tooth clearance front angle and an arc chip breaking tooth space are respectively arranged on the left side of the drill bit connecting neck, a self-centering type transverse edge is arranged at the left side center of the drill bit connecting neck, an expanding type tool retracting angle is arranged on the left side of the drill bit connecting neck, and an auxiliary chip discharging groove and an arc chip discharging groove are respectively arranged on the outer wall circumference of the drill bit connecting neck, and the outer side of the double-chamfer type cutting edge is provided with an outer circle cutting edge chamfer.

Preferably, the angle of the tooth clearance rake angle is 2 °/3 °.

Preferably, the joint of the shank and the drill bit connecting neck is in handle angle arc connection.

Preferably, the center of the drill bit connecting neck diameter is provided with an angle reinforcing core thickness.

Compared with the prior art, the beneficial effects of the utility model are that: the special groove-shaped drill bit for ensuring the roundness of the hole finish quality can carry out repeated extrusion machining on the hole through the matching between the main cutting ligament and the auxiliary cutting ligament, can conveniently discharge chips by polishing the double-arc groove, can comprehensively spray cutting fluid at the edge part through the inner cooling guide groove, can ensure the cutting stability of a cutter through the matching between the tooth clearance front angle and the self-centering transverse edge, can ensure that the chips are not extruded at the edge part of the cutter through the expanding type tool withdrawal angle, can radially splash the chips through the arc chips and avoid the winding of the chips, has simple structure and reasonable design, can effectively avoid the problems of hole wall scratch, bulge, burr, polyposis and the like caused by drilling, does not need subsequent machining treatment, not only saves time and labor in operation, greatly improves the integral working efficiency, but also reduces the production cost, and provides great convenience for the integral machining and manufacturing, the use is nimble, and the practicality is strong, satisfies the user demand on the current market.

Drawings

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

fig. 2 is a schematic view of the left side structure of the self-centering chisel edge of the present invention;

FIG. 3 is an enlarged schematic view of the structure at the position A of the present invention;

fig. 4 is an enlarged schematic structural diagram of the position B of the present invention.

In the figure: 1. the cutting tool comprises a first axial relief angle, a second axial relief angle, a main cutting ligament, a secondary cutting ligament, a polishing double-arc groove, a cooling inner groove, a cutting edge, a chamfering cutting edge, a clearance front angle, a cutting clearance 9, an arc chip breaking clearance, a self-centering chisel edge, a self-centering expanding type clearance angle, a cutter handle angle, a handle angle arc connection angle, a cutter auxiliary chip discharge groove, a cutter arc chip discharge angle, a cutter handle angle arc connection angle, a cutter handle angle, a cutter angle reinforcing core thickness, a cutter angle, a cutter outer edge chamfering angle, a drill head connecting neck diameter and a cutter angle.

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 special groove-shaped drill bit for guaranteeing the smoothness and roundness of a hole comprises a drill bit connecting neck diameter 18, a cutter handle 12 is arranged on the right side of the drill bit connecting neck diameter 18, a first axial back angle 1 and a second axial back angle 2 are respectively arranged on the left side of the drill bit connecting neck diameter 18, a main cutting ligament 3 and an auxiliary cutting ligament 4 are respectively arranged on the circumference of the outer wall of the drill bit connecting neck diameter 18, and through the matching between the main cutting ligament 3 and the auxiliary cutting ligament 4, multiple times of extrusion cutting processing can be performed on a drilled hole, meanwhile, the auxiliary cutting ligament 4 can be used as an auxiliary support, the stability of the whole body is improved, the shaking during drilling is avoided, a polishing double-arc-shaped groove 5 and an inner cooling guide groove 6 are respectively arranged on the circumference of the outer wall of the drill bit connecting neck diameter 18, the polishing double-arc-shaped groove 5 is adopted, so that scrap iron can pass through a chip removal groove at high speed during discharging, and the heat transferred to a cutter during scrap iron cutting is reduced, the friction of scrap iron passing through at high speed is also reduced, so that the scrap can be discharged more smoothly; the inner-cooling guide groove 6 is added, so that the cutting fluid can be well sprayed at the cutting edge of the cutter, the phenomenon of insufficient supply of the cutting fluid of a common drill bit is solved, the service life of the cutter is prolonged, the left end of a drill bit connecting neck diameter 18 is provided with a double-chamfer cutting edge 7, the double-chamfer cutting edge 7 is added, the front chamfer is used for reaming, the rear chamfer is used for finish machining of a reaming hole, the hole wall obtains higher finish requirement, the subsequent reaming machining procedures and time of most occasions are solved, the left side of the drill bit connecting neck diameter 18 is respectively provided with a tooth clearance front angle 8 and a circular arc chip breaking tooth clearance 9, the circular chip breaking tooth clearance 9 is adopted, when the cutter is used for cutting, chips are reversed when passing through the tooth clearance, so that the iron chips are broken, the problem that the iron chips are not broken and wound on the cutter when the cutter is used is solved, the self-centering transverse edge 10 is arranged at the left side of the drill bit connecting neck diameter 18, the left side that neck footpath 18 was connected to the drill bit is provided with expansion type and moves back tool angle 11, the outer wall circumference that neck footpath 18 was connected to the drill bit has seted up vice chip groove 14 and convex chip removal 15 respectively, adopt convex chip removal 15, make the cutter pass through convex back, iron fillings radially splash away, reduce iron fillings winding emergence probability, the outside of two chamfer formula cutting edges 7 is provided with outer circle cutting edge chamfer 17, outer circle cutting edge chamfer 17 makes the main cutting ligament not break open, can not cause the blade damage and influence work piece hole finish, the finish of drilling has been improved.

Preferably, the rake angle 8 is further angled at 2 °/3 °.

Preferably, a joint between the shank 12 and the drill connecting neck 18 is an angular arc connection 13 with a shank, and the arc and the angle are combined, so that the strength of the tool is increased, the anti-seismic and anti-vibration effects of the tool are increased, the cutting chips of the tool are more stable and have no vibration phenomenon, and the occurrence rate of tool breakage is reduced or solved.

Preferably, an angle-enhanced core thickness 16 is arranged at the center of the drill connecting neck 18, the core thickness is gradually increased from the front end of the cutter core thickness to the tail end of the cutter core thickness, so that the strength of the cutter is enhanced, and the cutter stress is enhanced due to the action of the angle-enhanced core thickness 16 during high-speed cutting, so that the problem of cutter breakage is solved.

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.

In the drilling process, on the basis of the main cutting ligament 3, an auxiliary cutting ligament 4 is added, when the main cutting ligament 3 completes drilling of a responsible hole, the auxiliary cutting ligament 4 is subjected to secondary extrusion cutting processing, so that the hole is improved in good smoothness, and the auxiliary cutting ligament 4 can also be used as an auxiliary support, so that the drill bit is connected with the neck diameter 18, the stability of a cutter is guaranteed while drilling is carried out, no shaking is generated, and the drilled hole is enabled to obtain better roundness and cylindricity; the common groove of the drill bit is changed, and the polished double-arc groove 5 is designed, so that the scrap iron can pass through the scrap discharging groove at a high speed when being discharged, the heat transferred to a cutter during scrap iron cutting is reduced, the friction caused by the high-speed passing of the scrap iron is also reduced, and the scrap can be discharged more smoothly; the inner-cooling guide groove 6 is added, so that the cutting fluid can be well sprayed at the cutting edge of the cutter, the problem of insufficient supply of the cutting fluid of a common drill is solved, and the service life of the cutter is prolonged; a double-chamfer type cutting edge 7 is added, the front chamfer is used for reaming, and the rear chamfer is used for reaming and finish machining of the reamed hole, so that the hole wall can obtain higher finish requirement, and the subsequent reaming working procedures and time in most occasions are solved; the tooth clearance front angle 8 is changed, and the cutting is carried out together by matching with the self-centering type chisel edge 10, so that the resistance is shared, the cutting stability of the cutter is ensured, the cutter can drill holes at high speed by self-centering, and the centering drill of the centering processing step before drilling is omitted; the arc-shaped chip breaking tooth gap 9 is adopted, so that when a cutter cuts, chips are reversed when passing through the tooth gap, the iron chips are broken, and the problem that the iron chips generated when the cutter cuts are not broken and wound on the cutter is solved; the enlarged tool withdrawal angle 11 is adopted, so that scrap iron is not extruded on the cutting edge part of the tool, and the problems of tool breakage and the like caused by accumulated scrap are prevented; the handle angle circular arc type connection 13 is adopted, and the circular arc and the angle are combined, so that the strength of the cutter is improved, the anti-seismic and anti-shock effects of the cutter are improved, the cutting chips of the cutter are more stable without the vibration phenomenon, and the occurrence rate of the cutter breakage is reduced or solved; because the broken chips are easy to generate too many chips, when the iron chips of the cutter are left and are not discharged, the iron chips are easy to extrude on the hole wall together with the cutter, the finish degree of the hole wall is poor, and the auxiliary chip grooves 14 are added, so that some chips are discharged out of the hole for the second time, the overstocking risk of the iron chips is avoided, and the finish degree requirement of the hole is ensured; the arc-shaped scrap discharging device 15 is adopted, so that scrap iron is splashed radially after the cutter passes through the arc shape, and the probability of scrap iron winding is reduced; because the excircle cutting parts of all drill bits are processed in an inverted cone shape, the diameter of the tail end of a cutter is reduced, the cutter is easy to break at the tail end of a cutter groove, the angle-enhanced core thickness 16 is adopted, the core thickness is gradually increased from the front end of the cutter core thickness to the tail end of the cutter core thickness, so that the strength of the cutter is enhanced, the strength of the cutter is enhanced due to the action of the angle-enhanced core thickness 16 when the cutter is subjected to high-speed cutting, and the problem of cutter breakage is greatly reduced or solved; the chamfer 17 of the excircle cutting edge is added, so that the main cutting ligament is not cracked, the surface smoothness of the inner hole of the workpiece is not influenced due to the damage of the cutting edge, and the smoothness of the drilled hole is improved;

the device simple structure, reasonable in design, it can avoid drilling effectively to lead to the appearance of pore wall mar, arch, burr, succulent scheduling problem, need not follow-up processing, not only operates labour saving and time saving, has improved holistic work efficiency greatly, has reduced manufacturing cost moreover, makes for holistic processing and provides very big facility, uses in a flexible way, and the practicality is strong, is fit for promoting.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "central position", "other end", "upper", "one side", "top", "inner", "front", "central", "two ends", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated; also, unless expressly stated or limited otherwise, the terms "snap-fit," "plug-in," "weld," "mount," "set," "interference fit," "screw-on," "pin-on," and the like are to be construed broadly, e.g., as a fixed connection, a removable connection, or an integral whole; the two components can be connected mechanically, directly or indirectly through an intermediate medium, or can be connected internally or in an interaction relationship, and unless otherwise specifically limited, the specific meaning of the above terms in the present invention can 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

1. The utility model provides a guarantee special groove type drill bit of hole finish circularity, includes drill bit connection neck footpath (18), its characterized in that: the right side of the drill bit connecting neck (18) is provided with a cutter handle (12), the left side of the drill bit connecting neck (18) is provided with a first axial rear angle (1) and a second axial rear angle (2) respectively, the outer wall circumference of the drill bit connecting neck (18) is provided with a main cutting ligament (3) and an auxiliary cutting ligament (4) respectively, the outer wall circumference of the drill bit connecting neck (18) is provided with a polishing double-arc groove (5) and an inner cooling guide groove (6) respectively, the left end of the drill bit connecting neck (18) is provided with a double-chamfer type cutting edge (7), the left side of the drill bit connecting neck (18) is provided with a tooth clearance front angle (8) and a circular arc chip breaking tooth clearance (9) respectively, the left side center position of the drill bit connecting neck (18) is provided with a self-centering type chisel edge (10), and the left side of the drill bit connecting neck (18) is provided with an expanding type tool retracting angle (11), vice chip groove (14) and convex chip removal (15) have been seted up respectively to the outer wall circumference of neck footpath (18) is connected to the drill bit, the outside of two chamfer formula cutting edges (7) is provided with excircle cutting edge chamfer (17).

2. The special groove type drill for guaranteeing roundness of finish of hole according to claim 1, wherein: the angle of the tooth clearance front angle (8) is 2 DEG/3 deg.

3. The special groove type drill for guaranteeing roundness of finish of hole according to claim 1, wherein: the joint of the shank (12) and the drill bit connecting neck (18) is designed to be connected with a shank angle arc type connection (13).

4. The special groove type drill for guaranteeing roundness of finish of hole according to claim 1, wherein: the center of the drill bit connecting neck (18) is provided with an angle reinforcing mold core thickness (16).