CN213002850U

CN213002850U - Drill bit integrating drilling, tapping and positive and negative chamfering

Info

Publication number: CN213002850U
Application number: CN202021458822.1U
Authority: CN
Inventors: 袁伟; 王小杰; 郭志江; 魏思未
Original assignee: Wuhan Lesheng Taitu Equipment Management Co ltd
Current assignee: Wuhan Lesheng Taitu Equipment Management Co ltd
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2021-04-20
Anticipated expiration: 2030-07-22

Abstract

The utility model discloses a collect bore, attack, positive and negative chamfer in drill bit of an organic whole, including bit, first transition part, tapping main part and drillstock, bit fixed connection is in first transition part left side outer wall, first transition part fixed connection is in tapping main part left side outer wall, tapping main part fixed connection is in drillstock left side outer wall, bit outer wall fixedly connected with spiral piece, tapping main part outer wall fixedly connected with second transition part, the second transition part is close to drillstock one end outer wall and sets up straight type groove and screw thread, the tapping main part is close to drillstock one end and is provided with the third transition part. The utility model discloses in, through in cold hole in seting up at the drill bit outer wall, the cold groove in the third transition part is inside to be seted up, and interior cold groove communicates with interior cold hole, including the cold inslot add the coolant liquid, cools off drill bit, improves life.

Description

Drill bit integrating drilling, tapping and positive and negative chamfering

Technical Field

The utility model belongs to the technical field of the drill bit, specifically be a collect bore, attack, positive and negative chamfer in drill bit of an organic whole.

Background

The drill is a tool for drilling through holes or blind holes in solid materials and reaming existing holes. The conventional drill mainly comprises a twist drill, a flat drill, a center drill, a deep hole drill and a trepanning drill, and the twist drill is a most widely applied hole machining tool. The diameter is usually in the range of 0.25 to 80 mm. It is mainly composed of a twist drill working part and a handle part. The working part is provided with two spiral grooves which are shaped like twist, thereby obtaining the name. In order to reduce the friction between the guide part and the hole wall during drilling, the diameter of the twist drill is gradually reduced from the drill tip to the handle part and is in an inverted cone shape. The helix angle of a twist drill primarily affects the magnitude of the rake angle on the cutting edge, land strength and chip removal performance, and is typically 25 ° to 32 °. The spiral groove can be processed by milling, grinding, hot rolling or hot extrusion, and the front end of the drill bit is sharpened to form a cutting part. The vertex angle of the cutting part of the standard twist drill is 118 degrees, the bevel angle of the chisel edge is 40 degrees to 60 degrees, and the back angle is 8 degrees to 20 degrees. Due to structural reasons, the front angle is large at the edge and gradually reduced towards the middle, the chisel edge is a negative front angle (about-55 degrees), and the extrusion effect is realized during drilling;

in the prior art, when an automobile brake disc is machined, four steps are carried out; drilling, tapping, go up the chamfer, lower chamfer, ordinary drill bit need carry out frequent tool changing operation, need readjust axiality moreover, and work efficiency is lower.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: in order to solve the problem that the prior art is divided into four steps when an automobile brake disc is processed; drilling, tapping, go up the chamfer, lower chamfer, general drill bit need carry out frequent tool changing operation, need readjust axiality moreover, the lower problem of work efficiency provides one kind and collects and bores, attacks, positive and negative chamfer in drill bit of an organic whole.

The utility model adopts the technical scheme as follows: the utility model provides a collect bore, attack, positive and negative chamfer in drill bit of an organic whole, includes drill bit, first transition portion, tapping main part and drillstock, drill bit fixed connection is in first transition portion left side outer wall, first transition portion fixed connection is in tapping main part left side outer wall, tapping main part fixed connection is in drillstock left side outer wall, drill bit outer wall fixedly connected with spiral piece, tapping main part outer wall fixedly connected with second transition portion, second transition portion is close to drillstock one end outer wall and is provided with straight type groove and screw thread, the tapping main part is close to drillstock one end and is provided with the third transition portion.

In a preferred embodiment, the bit head diameter is 0.15mm greater than the second transition portion diameter, which is 0.5mm greater than the third transition portion diameter.

In a preferred embodiment, the first transition portion and the second transition portion are connected to form a positive chamfer edge, the tool is eccentric, and a positive orifice chamfer is milled by interpolation of the positive chamfer edge.

In a preferred embodiment, the drill head and the first transition portion are connected to form an inverted chamfer edge, the tool is eccentric, and the inverted chamfer operation is performed by interpolation milling of the inverted chamfer edge.

In a preferred embodiment, the number of the second transition portions is four.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the utility model discloses in, through connecting first transition part and second transition part and forming positive chamfer sword, with cutter off-centre, through positive chamfer sword interpolation mill positive orifice chamfer, when the positive hole chamfer, need not change the drill bit, improve work efficiency.

2. The utility model discloses in, through connecting formation reverse chamfer sword with drill bit head and first transition part, with cutter off-centre, through the operation of reverse chamfer sword interpolation milling reverse chamfer, when the reverse hole chamfer, need not change the drill bit, improve work efficiency.

Drawings

FIG. 1 is a schematic view of a drill bit integrating drilling, tapping, positive and negative chamfering;

FIG. 2 is a top view of a drill bit A of the present invention integrating drilling, tapping, positive and negative chamfering;

the labels in the figure are: 1-bit head, 2-first transition part, 3-tapping body, 4-drill handle, 5-spiral block, 6-second transition part, 7-straight groove and 8-third transition part.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are 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 efforts belong to the protection scope of the present invention.

Referring to fig. 1-2, a drill bit integrating drilling, tapping and positive and negative chamfering comprises a drill bit 1, a first transition part 2, a tapping main body 3 and a drill shank 4, wherein the drill bit 1 is fixedly connected to the outer wall of the left side of the first transition part 2, the drill bit 1 is connected with the first transition part 2 to form an inverted chamfer edge, a cutter is eccentric, the inverted chamfer operation is performed through interpolation of the inverted chamfer edge, the first transition part 2 is fixedly connected to the outer wall of the left side of the tapping main body 3, the tapping main body 3 is fixedly connected to the outer wall of the left side of the drill shank 4, a screw block 5 is fixedly connected to the outer wall of the drill bit 1, a second transition part 6 is fixedly connected to the outer wall of the tapping main body 3, the number of the second transition parts 6 is four, the first transition part 2 is connected with the second transition part 6 to form a positive chamfer edge, the cutter is eccentric, a positive hole chamfer is milled through the interpolation of the positive chamfer edge, a straight groove 7 and, through the chip removal of the straight-shaped groove 7, a third transition part 8 is arranged at one end, close to the drill shank 4, of the tapping body 3, the diameter of the drill bit head 1 is larger than the diameter of the second transition part 6 by 0.15mm, and the diameter of the second transition part 6 is larger than the diameter of the third transition part 8 by 0.5 mm.

The working principle is as follows: when an automobile brake disc is machined, firstly, a drill bit head part 1 is fed to a position 1mm on the surface of a workpiece, a hole is continuously drilled downwards, the drill bit head part 1 is drilled to a position 2mm below the bottom of the hole, a cutter is fast-forwarded to a chamfer of a reverse hole, the drill bit head part 1 is connected with a first transition part 2 to form a reverse chamfer edge, the cutter is eccentric, the reverse chamfer is milled through interpolation of the reverse chamfer edge, then the cutter is fast-moved to the central axis, then the cutter is fast-forwarded to the chamfer of a forward hole, the cutter is eccentric, the chamfer of the forward hole is milled through interpolation of the forward chamfer edge, the cutter is fast-moved, the cutter returns to the central axis, the cutter is drilled downwards, chips are removed through a straight groove 7, then the cutter is moved backwards until the straight groove 7 extends out of the surface of the workpiece by 1mm, and finally the cutter is fast moved to a safe distance, and through the novel automobile brake disc machining device, the drilling, the, the processing efficiency is improved, and the processing accuracy is improved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a collection is bored, is attacked, positive and negative chamfer in drill bit of an organic whole, includes drill bit head (1), first transition portion (2), tapping main part (3) and drillstock (4), its characterized in that: drill bit (1) fixed connection is in first transition portion (2) left side outer wall, first transition portion (2) fixed connection is in tapping main part (3) left side outer wall, tapping main part (3) fixed connection is in drillstock (4) left side outer wall, drill bit (1) outer wall is provided with two spiral pieces (5), tapping main part (3) outer wall fixedly connected with second transition portion (6), second transition portion (6) are close to drillstock (4) one end outer wall and are provided with straight type groove (7) and screw thread, tapping main part (3) are close to drillstock (4) one end and are provided with third transition portion (8).

2. The drill bit integrating drilling, tapping and forward and reverse chamfering as claimed in claim 1, wherein: the diameter of the drill bit head (1) is 0.15mm larger than that of the second transition part (6), and the diameter of the second transition part (6) is 0.5mm larger than that of the third transition part (8).

3. The drill bit integrating drilling, tapping and forward and reverse chamfering as claimed in claim 1, wherein: the first transition part (2) and the second transition part (6) are connected to form a right-angle chamfer edge.

4. The drill bit integrating drilling, tapping and forward and reverse chamfering as claimed in claim 1, wherein: the drill bit head (1) and the first transition part (2) are connected to form an inverted chamfer edge.

5. The drill bit integrating drilling, tapping and forward and reverse chamfering as claimed in claim 1, wherein: the number of the second transition portions (6) is four.