CN221454434U

CN221454434U - Machining drill bit for machining holes in inclined planes

Info

Publication number: CN221454434U
Application number: CN202323386840.XU
Authority: CN
Inventors: 张伟
Original assignee: Chongqing Yujiang Die Casting Co ltd
Current assignee: Chongqing Yujiang Die Casting Co ltd
Priority date: 2023-12-11
Filing date: 2023-12-11
Publication date: 2024-08-02
Anticipated expiration: 2033-12-11

Abstract

The machining drill bit for machining holes on inclined surfaces comprises a shaft body cutting part and a drill bit part, wherein the drill bit part is arranged at the end part of the shaft body cutting part and consists of a flat drill cutting part and a sharp drill cutting part, and the sharp drill cutting part is arranged in the middle of the flat drill cutting part; the tip drill blade part comprises a frustum blade part and a tip blade part, wherein the tip blade part is arranged at the middle part of the frustum blade part, and the bottom of the tip blade part coincides with the top section of the frustum blade part. The invention has simple structure, can meet the requirements of processing holes on inclined planes at one time, and has high processing stability and precision and high processing efficiency.

Description

Machining drill bit for machining holes in inclined planes

Technical Field

The utility model belongs to the technical field of machining tools, and particularly relates to a machining drill bit for machining holes on inclined planes.

Background

In cylinder body parts, often need to process drilling such as oil duct hole on the inclined plane, need drill a preliminary working drill way on the plane with the crew cut first on the inclined plane, change the drill bit of taking the tip again on preliminary working the drill way's basis, continue to go deep into the oil duct hole of processing the inclined plane downwards, because in the course of working, need change different cutters and process, not only can lead to machining efficiency low, and the twice processing can lead to drill way department machining precision not high moreover, and even the error or the anchor clamps shift appear in the location, can appear the condition of scrapping the part.

Among the prior art, the patent literature of bulletin number CN219665318U discloses a inclined plane oilhole screw thread processing frock, including the base, have the slope locating surface on the base, install V type piece down and go up V type piece on the slope locating surface, V type clamping surface down all has V type clamping surface with last V type piece to V type clamping surface down V type clamping surface and last V type clamping surface relative arrangement of V type piece, go up V type piece slidable mounting in the slope locating surface, be provided with sharp drive assembly on the slope locating surface, sharp drive assembly can act on last V type piece and make last V type piece move towards V type piece down. According to the scheme, when the machining is performed, the upper V-shaped block and the lower V-shaped block are arranged on the inclined plane locating surface, so that the machining mode of adjusting the inclined plane to be a plane is achieved by machining the hole diameter of the machine tool spindle and the surface of the workpiece, the machining requirement of the inclined oil hole shown in fig. 4 cannot be met, the machined oil hole is perpendicular to the inclined plane, the inclined oil hole machined in general is inclined to the inclined plane and perpendicular to the part, and the special tool needs to be adjusted in advance every time, so that the machining efficiency is not high as well, and other machining is not facilitated at the machining center.

Disclosure of utility model

1. Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides the machining drill bit for machining the inclined plane machining hole, which has the advantages of simple structure, high machining stability and precision and high machining efficiency, and can meet the requirement of machining the inclined plane machining hole at one time.

2. Specific technical scheme

The machining drill bit for machining the holes on the inclined surfaces comprises a shaft body blade part and a drill bit part, wherein the drill bit part is arranged at the end part of the shaft body blade part and consists of a flat drill blade part and a sharp drill blade part, and the sharp drill blade part is arranged at the right middle part of the flat drill blade part;

The tip drill blade part is a frustum blade part and a tip blade part, the tip blade part is arranged at the middle part of the frustum blade part, the bottom of the tip blade part is overlapped with the top section of the frustum blade part, the tip blade part and the frustum blade part are both provided with oblique cutting edges, the oblique cutting edges of the tip blade part and the central line of the tip blade part are inclined angles alpha, the oblique cutting edges of the frustum blade part and the central line of the taper blade part are inclined angles beta, and the alpha is larger than beta.

As preferable: the novel shaft body cutting part also comprises a mounting handle part which is arranged at the other end part of the shaft body cutting part.

As preferable: the axial lead of the mounting handle part and the shaft blade part is coincident with the central line of the drill bit part, and the flat drill blade part is coincident with the central line of the sharp drill blade part.

As preferable: the flat drill edge has a chamfer angle of 1.5 ° -2 °, i.e. a downward inclination of 1.5 ° -2 ° between the flat drill edge and the horizontal.

As preferable: the outer diameter of the flat drill blade part is D, and the outer diameter of the bottom of the sharp drill blade part is D, and D is 1.5 to 2 times of D, namely D/D is equal to 1.5-2.

As preferable: wherein D is 1.55 times D, i.e. D/D is equal to 1.55.

As preferable: the shaft body blade part consists of a thick shaft blade part and a thin shaft blade part, the section outer diameter of the thick shaft blade part is larger than that of the thin shaft blade part, and the thick shaft blade part is close to the drill part.

As preferable: the shaft body blade part is provided with a straight chip removing groove blade, and the straight chip removing groove blade penetrates through the thick shaft blade part and the thin shaft blade part.

As preferable: the length of the thick shaft blade part is 20-30mm.

The beneficial effects of the utility model are as follows: the flat drill blade part and the sharp drill blade part are arranged, the flat drill blade part drills a relatively flat hole surface on the inclined surface of the part to be processed, and then the sharp drill blade part can drill holes deeply, so that deeper holes can be processed on the inclined surface of the part to be processed only once without changing a processing tool and repositioning the processing, the processing efficiency is high, and the processing stability and the processing precision are both higher; through different inclination angles of the sharp edge part and the frustum edge part, a relatively convex sharp edge part is formed on the transition surface of the taper platform, the sharp edge part firstly performs cutting motion with the inclined surface of the part to be processed and performs progressive cutting again, so that the sharp edge part is not easy to collapse, the cutting effect is better, and the service life is longer; the thin shaft blade part 22 is arranged to prevent the shaft blade part 2 from clamping or even cutting off the cutter at the bending part, and the straight chip discharging groove blade is arranged at the shaft blade part, so that the service life of the drill is longer.

Drawings

Fig. 1 is a schematic view of the overall installation structure of the present utility model.

Fig. 2 is a schematic view of the overall installation structure of the present utility model.

Fig. 3 is an enlarged partial schematic view at a in fig. 2.

Fig. 4 is a schematic diagram of the oblique oil hole portion of the part to be machined and the machining drill bit.

In the figure: a mounting handle 1; a shaft body blade 2; a drill part 3; a flat drill blade 31; a sharp drill blade 32; a frustum blade 321; a sharp edge 322; a thick shaft blade portion 21; a thin shaft blade 22.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "top", "bottom", "upper", "lower", "horizontal", etc., are directions or positional relationships based on those shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model; and unless clearly indicated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly.

Examples:

As shown in fig. 1, 2, 3 and 4: a machining drill bit for inclined plane processing hole is provided with installation stalk portion 1, axle body cutting part 2 and drill bit portion 3, and drill bit portion 3 is established at an end of axle body cutting part 2, and installation stalk portion 1 is established at another end of axle body cutting part 2, and installation stalk portion 1, axle body cutting part 2 and drill bit portion 3 are integrated into one piece structure, and intensity is higher like this, and life is longer.

The drill part 3 consists of a flat drill blade part 31 and a sharp drill blade part 32, and the sharp drill blade part 32 is arranged at the middle part of the flat drill blade part 31; wherein, the axis line of the mounting handle part 1 and the shaft body blade part 2 is overlapped with the axis line of the drill part 3, and the flat drill blade part 31 is overlapped with the axis line of the sharp drill blade part 32.

The machining drill bit is suitable for the inclined plane of a part to be machined within 15 degrees, can replace 2 cutters in the traditional process, improves efficiency, reduces cutter cost, and when the inclined oil hole or the common inclined hole is machined in the inclined plane of the part to be machined, the machining drill bit moves downwards, the flat drill blade part 31 is firstly contacted with the inclined plane of the part to be machined, the inclined plane of the part to be machined is drilled into a relatively flat hole surface, then the sharp drill blade part 32 is used for continuously drilling deep holes, so that deeper holes can be machined in the inclined plane of the part to be machined only once without replacing the cutters, and repositioning machining is performed, the machining efficiency is high, the machining stability and the machining precision are higher, the cutter replacing time and the repeated path machining time are saved, the machining of a single piece is at least saved by 20 seconds, 35 pieces can be manufactured in one day, and the machining is 9996 pieces are produced in 280 days.

The sharp drill blade 32 is divided into a frustum blade 321 and a tip blade 322, the tip blade 322 is disposed in the middle of the frustum blade 321, i.e. the center line of the tip blade 322 coincides with the center line of the frustum blade 321, the bottom of the tip blade 322 coincides with the top section of the frustum blade 321, both the tip blade 322 and the frustum blade 321 have oblique edges, the oblique edge of the tip blade 322 has an angle α with the center line thereof, the oblique edge of the frustum blade 321 has an angle β with the center line thereof, and the angle α is greater than β, the angle α differs by 10 ° to 30 °, so that a relatively convex tip blade is formed on the transition surface between the bottom of the tip blade 322 and the top of the frustum blade 321, the tip blade is the point drill blade 32 which firstly performs cutting movement with the inclined surface of the part to be processed, and then the cutting surface sequentially enlarges toward the edges of the tip blade 322 and the frustum blade 321, so that the tip blade 32 is less prone to chipping, and the service life is longer.

The flat drill blade 31 has a chamfer angle of 1.5 ° -2 °, which is the chamfer angle of the most commonly used aluminum cylinder for machining, and the material is different in the selectable range of chamfer angles, i.e. the flat drill blade 31 has an inclination of 1.5 ° -2 ° with respect to the horizontal plane, and a chamfer angle is formed on the outer diameter, so as to enhance the strength of the blade and prolong the machining service life of the drill bit 3.

And, the outer diameter of the flat drill blade 31 is D, the outer diameter of the bottom of the sharp drill blade 32 is D, D is 1.5 to 2 times D, i.e. D/D is 1.5 to 2, and most preferably D is 1.55 times D, i.e. D/D is 1.55, so that the drilling effect on the inclined plane is better and more stable, and the slipping and the shifting are not easy.

The shaft blade 2 is composed of a thick shaft blade 21 and a thin shaft blade 22, the outer diameter of the cross section of the thick shaft blade 21 is larger than that of the cross section of the thin shaft blade 22, the thick shaft blade 21 is arranged close to the drill part 3, the length of the thick shaft blade 21 is 20-30mm, and after the inclined oil hole is drilled, the part of the thick shaft blade 21 is microscopically bent, so that the thin shaft blade 22 is slightly smaller than the thick shaft blade 21 in order to avoid the clamping or even cutting of the shaft blade 2 at the bending part, and the shaft blade 2 has an avoidance space to cope with the local slight bending.

The most widely used machining drill bit at present has the total length of 105mm, the length-diameter ratio is within 10 times diameter, the length of the shaft blade part 2 is 64mm, the length of the thick shaft blade part 21 is 20mm, the outer diameter of the flat drill blade part 31 is 6.2mm, the outer diameter of the bottom of the tip drill blade part 32 is 4mm, the maximum outer diameter of the tip blade part 322 is 2mm, the inclined angle between the tip blade part 322 and the central line thereof is 65 degrees, the inclined angle between the frustum blade part 321 and the central line thereof is 45 degrees, and the flat drill blade part 31 has an chamfer angle of 2 degrees.

The shaft body blade part 2 is provided with a straight chip groove blade, and the straight chip groove blade penetrates through the thick shaft blade part 21 and the thin shaft blade part 22, and can also be provided as a spiral chip groove, but through workshop experiments, the drill bit of the straight chip groove blade has longer service life, can process oblique oil holes of about 8900 parts, and the spiral drill bit can only process oblique oil holes of 3000 parts and is scrapped.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A machine-operated drill for machining holes in inclined surfaces, comprising: the drilling machine comprises a shaft body cutting part (2) and a drill bit part (3), wherein the drill bit part (3) is arranged at the end part of the shaft body cutting part (2), the drill bit part (3) consists of a flat drill cutting part (31) and a sharp drill cutting part (32), and the sharp drill cutting part (32) is arranged at the middle part of the flat drill cutting part (31);

The tip drill cutting edge part (32) is divided into a frustum cutting edge part (321) and a tip cutting edge part (322), the tip cutting edge part (322) is arranged at the middle part of the frustum cutting edge part (321), the bottom of the tip cutting edge part (322) is overlapped with the top section of the frustum cutting edge part (321), the tip cutting edge part (322) and the frustum cutting edge part (321) are both provided with inclined cutting edges, the inclined angle between the inclined cutting edge of the tip cutting edge part (322) and the central line of the inclined cutting edge part is alpha, and the inclined angle between the inclined cutting edge of the frustum cutting edge part (321) and the central line of the inclined cutting edge is beta, and alpha is larger than beta.

2. The machined drill for bevel tooling of a hole of claim 1, wherein: the novel shaft body cutting part also comprises a mounting handle part (1), wherein the mounting handle part (1) is arranged at the other end part of the shaft body cutting part (2).

3. The machined drill for bevel tooling of a hole of claim 2, wherein: the axial lead of the mounting handle part (1) and the axial body blade part (2) is overlapped with the central line of the drill bit part (3), and the flat drill blade part (31) is overlapped with the central line of the sharp drill blade part (32).

4. A machine bit for chamfering holes as defined in claim 3, wherein: the flat drill edge (31) has a chamfer angle of 1.5-2 degrees.

5. A machine bit for chamfering holes according to any of claims 1-4, characterized in that: the outer diameter of the flat drill blade part (31) is D, the outer diameter of the bottom of the sharp drill blade part (32) is D, and D is 1.5 to 2 times of D.

6. The machined drill for bevel tooling of a hole of claim 5, wherein: wherein D is 1.55 times D.

7. A machine bit for chamfering holes according to any of claims 1-4 or 6, characterized in that: the shaft body blade part (2) consists of a thick shaft blade part (21) and a thin shaft blade part (22), wherein the section outer diameter of the thick shaft blade part (21) is larger than that of the thin shaft blade part (22), and the thick shaft blade part (21) is arranged close to the drill part (3).

8. The machined drill for bevel tooling of a hole of claim 7, wherein: the shaft body blade part (2) is provided with a straight chip groove blade, and the straight chip groove blade penetrates through the thick shaft blade part (21) and the thin shaft blade part (22).

9. The machined drill for bevel tooling of a hole of claim 8, wherein: the length of the thick shaft blade part (21) is 20-30mm.