CN217529322U

CN217529322U - Step drill bit for machining guide hole

Info

Publication number: CN217529322U
Application number: CN202123376084.3U
Authority: CN
Inventors: 金如荣; 於兵; 毛志尚
Original assignee: Changzhou Inmans Tools Co ltd
Current assignee: Changzhou Inmans Tools Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-10-04
Anticipated expiration: 2031-12-30

Abstract

The utility model discloses a step drill bit for processing bullport, including boring body, drillstock and drill seat. The utility model has the advantages that: the first drill body and the second drill body are made of hard alloy materials, the hardness of the drill body is improved, the practicability of the drill body is improved, the outer diameter of the first drill body is smaller than the outer diameter of the second drill body, an inward-sinking type guide hole is convenient to drill, subsequent reprocessing is convenient to conduct, continuous spiral chip removal grooves are formed in the surfaces of the first drill body and the second drill body, chips are convenient to remove, the work efficiency is further improved, the drill handle and the handle seat are in threaded rotation connection through a threaded rod, the thread direction of the threaded rod is opposite to the rotation direction of the drill body, assembling or disassembling is convenient to conduct, meanwhile, due to the design of reverse threads, the drill bit is connected more tightly during rotation cutting, four through holes are uniformly formed in the edge of the connecting seat, a bolt penetrates through holes, the connecting seat and the drilling machine can be fixedly assembled together, meanwhile, the stress is uniform, and looseness caused by long-time use is avoided.

Description

Step drill bit for machining guide hole

Technical Field

The utility model relates to a drill bit specifically is a step drill bit for processing bullport, belongs to drilling tool technical field.

Background

The drill bit is used for drilling a through hole or a blind hole in a solid material and can be used as a tool for reaming the existing hole, the commonly used drill bits mainly comprise a twist drill, a flat drill, a center drill, a deep hole drill and a trepanning drill, although the reaming drill and the countersink cannot drill holes in the solid material, the reaming drill and the countersink are also customarily classified into the drill bits, when the mechanical machining is carried out, the drill bit is often used for carrying out hole machining on a workpiece, but the accurate positioning of the drilling position cannot be usually realized during the actual machining, so that a guide hole needs to be drilled in the workpiece in advance through a step drill bit.

The existing drill bit is simple in structure:

1) The outer diameter of a drill body of a traditional drill bit is certain, when holes are drilled, particularly when holes with strict position requirements are machined, the positions of the drilled holes cannot be accurately positioned, the holes are prone to being distorted, further workpieces cannot be normally used, and production cost is greatly increased;

2) The drill handle and the drill seat are fixed by welding, and although the connection is firm, the drill handle and the drill seat are inconvenient to disassemble, replace and maintain at the later stage and have certain limitations.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a step drill for machining a pilot hole in order to solve the above-mentioned problems.

The utility model discloses a following technical scheme realizes above-mentioned purpose: a step drill for processing a guide hole comprises

The drill body consists of a first drill body at the outer end and a second drill body at the inner end, two inclined first drill edges are arranged at the top end of the first drill body, two first polishing edges are arranged on the surface of the first drill body, two second drill edges are arranged at the outer end of the second drill body, and second polishing edges are distributed on the surface of the second drill body; and

the drill handle is positioned at the rear end of the second drill body, and the outer diameter of the drill handle is smaller than that of the second drill body; and

the drill base consists of a handle base connected to the drill handle and a disc-shaped connecting base welded at the outer end of the handle base, and a drill bit and a drilling machine can be stably assembled together.

As a further aspect of the present invention: the first drill body, the second drill body and the drill handle are of an integrated structure, and the first drill body and the second drill body are made of hard alloy materials.

As the utility model discloses further scheme again: the first drill body and the second drill body are of a double-edge structure, and the outer diameter of the first drill body is smaller than that of the second drill body.

As the utility model discloses further scheme again: and continuous spiral chip removing grooves are formed in the surfaces of the first drill body and the second drill body.

As a further aspect of the present invention: the drill bit is characterized in that a threaded rod is fixed at the center of the outer end face of the drill bit handle, the drill bit handle is in threaded rotation connection with the handle seat through the threaded rod, and the thread direction of the threaded rod is opposite to the rotation direction of the drill body.

As the utility model discloses further scheme again: four through holes are uniformly formed in the edge of the connecting seat.

The utility model has the advantages that:

1) The first drill body and the second drill body are made of hard alloy materials, so that the hardness of the drill body is improved, the practicability of the drill body is improved, the outer diameter of the first drill body is smaller than that of the second drill body, an inner-sinking type guide hole is convenient to drill, the subsequent reprocessing is convenient, continuous spiral chip removal grooves are formed in the surfaces of the first drill body and the second drill body, the chips are convenient to remove, and the working efficiency is further improved;

2) The drill handle is connected with the handle seat through the threaded rod in a threaded rotating mode, the thread direction of the threaded rod is opposite to the rotation direction of the drill body, assembling or disassembling are facilitated, meanwhile, the drill bit is more tightly connected during rotary cutting due to the design of reverse threads, four through holes are evenly formed in the edge of the connecting seat, the bolt penetrates through the through holes, the connecting seat and the drilling machine can be fixedly assembled together, meanwhile, stress is even, and looseness caused by long-time use is avoided.

Drawings

FIG. 1 is a schematic structural view of a stepped drill according to the present invention;

fig. 2 is a schematic view of the connection structure of the drill shank and the shank seat of the present invention.

In the figure: 1. a first drill body, 2, a first drill edge, 3, a first sharpening edge, 4, a second drill body, 5, a second drill edge, 6, a second grinding edge, 7, a chip removing groove, 8, a drill handle, 9, a threaded rod, 10, a handle seat, 11, a connecting seat, 12 and a through hole.

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.

Example one

Referring to FIGS. 1 to 2, a step drill for machining a pilot hole includes

The drill body consists of a first drill body 1 at the outer end and a second drill body 4 at the inner end, two inclined first drill edges 2 are arranged at the top end of the first drill body 1, two first polishing edges 3 are arranged on the surface of the first drill body 1, two second drill edges 5 are arranged at the outer end of the second drill body 4, and second polishing edges 6 are distributed on the surface of the second drill body 4; and

a drill shank 8 which is located at the rear end of the second drill body 4 and has an outer diameter smaller than the outer diameter of the second drill body 4; and

and the drill seat consists of a handle seat 10 connected to the drill handle 8 and a disc-shaped connecting seat 11 welded at the outer end of the handle seat 10, and can stably assemble a drill bit and the drilling machine together.

In the embodiment of the utility model, first brill body 1, second brill body 4 and drillstock 8 are the integrated structure, and just first brill body 1 and second brill body 4 all choose for use the carbide material to make, improve brill body hardness, increase its practicality.

The embodiment of the utility model provides an in, first brill body 1 and second brill body 4 are the twolip structure, and first brill body 1 external diameter is less than second brill body 4 external diameters, are convenient for drill out the formula of sinking bullport, convenient follow-up reprocessing.

The embodiment of the utility model provides an in, first brill body 1 and second bore 4 surfaces and seted up continuous heliciform chip groove 7, make things convenient for the chip removal, and then improve work efficiency.

Example two

Referring to FIGS. 1 to 2, a step drill for machining a pilot hole includes

a drill shank 8, which is located at the rear end of the second drill body 4 and has an outer diameter smaller than the outer diameter of the second drill body 4; and

The embodiment of the utility model provides an in, the outer terminal surface center of drill shank 8 is fixed with threaded rod 9, drill shank 8 is the screw thread through threaded rod 9 with handle seat 10 and rotates and be connected, and threaded rod 9's screw thread direction and the drill body direction of rotation are opposite, are convenient for assemble or dismantle, and the design of reverse screw also makes the more fastening that the drill bit is connected during rotatory cutting simultaneously.

The embodiment of the utility model provides an in, four through-holes 12 have evenly been seted up at connecting seat 11 edge, thereby make the bolt pass through-hole 12 and can be in the same place connecting seat 11 and the fixed equipment of drilling machine, and the atress is even simultaneously, avoids long-time use to produce not hard up.

The working principle is as follows: when the step drill for machining the guide hole is used, firstly, the threaded rod 9 at the outer end of the drill handle 8 is in threaded connection with the handle seat 10, then, a bolt penetrates through the through hole 12 to fixedly assemble the connecting seat 11 with the drilling machine, finally, the drilling machine is opened, the rotating direction of the drill body is opposite to the thread direction of the threaded rod 9, then, the inner-sinking type guide hole can be drilled on a workpiece through the first drill body 1 and the second drill body 4 with different outer diameters, therefore, the drilling position can be conveniently and accurately positioned, the hole is guaranteed not to be askew, in the process, chips in the hole can be quickly cleaned through the chip withdrawing grooves 7 in the surfaces of the first drill body 1 and the second drill body 4, the working efficiency is improved, meanwhile, due to the design of reverse threads, the drill bit is connected more tightly during the rotating cutting process, and the influence on the machining precision due to the looseness of the drill bit is avoided.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.

Claims

1. A step drill for processing a guide hole is characterized in that: comprises that

The drill body consists of a first drill body (1) at the outer end and a second drill body (4) at the inner end, two inclined first drill edges (2) are arranged at the top end of the first drill body (1), two first polishing edges (3) are arranged on the surface of the first drill body (1), two second drill edges (5) are arranged at the outer end of the second drill body (4), and second polishing edges (6) are distributed on the surface of the second drill body (4); and

a drill shank (8) which is located at the rear end of the second drill body (4) and has an outer diameter smaller than the outer diameter of the second drill body (4); and

the drill base consists of a handle base (10) connected to the drill handle (8) and a disc-shaped connecting base (11) welded at the outer end of the handle base (10), and a drill bit and a drilling machine can be stably assembled together.

2. The step drill for machining a guide hole as claimed in claim 1, wherein: the first drill body (1), the second drill body (4) and the drill handle (8) are of an integrated structure, and the first drill body (1) and the second drill body (4) are made of hard alloy materials.

3. A step drill for machining a guide hole according to claim 1, characterized in that: the first drill body (1) and the second drill body (4) are of a double-edge structure, and the outer diameter of the first drill body (1) is smaller than that of the second drill body (4).

4. A step drill for machining a guide hole according to claim 1, characterized in that: the surfaces of the first drill body (1) and the second drill body (4) are provided with continuous spiral chip-removing grooves (7).

5. A step drill for machining a guide hole according to claim 1, characterized in that: the drill handle is characterized in that a threaded rod (9) is fixed at the center of the outer end face of the drill handle (8), the drill handle (8) and the handle seat (10) are in threaded rotation connection through the threaded rod (9), and the thread direction of the threaded rod (9) is opposite to the rotation direction of the drill body.

6. A step drill for machining a guide hole according to claim 1, characterized in that: four through holes (12) are uniformly formed in the edge of the connecting seat (11).