CN214977976U

CN214977976U - Stepped drill for machining threaded bottom hole, counter bore and orifice chamfer

Info

Publication number: CN214977976U
Application number: CN202120752957.7U
Authority: CN
Inventors: 叶军伟; 张洪超
Original assignee: Ningbo Yongxiang Casting Co ltd
Current assignee: Ningbo Yongxiang Casting Co ltd
Priority date: 2021-04-14
Filing date: 2021-04-14
Publication date: 2021-12-03
Anticipated expiration: 2031-04-14

Abstract

The utility model relates to a ladder of processing screw thread bottom hole, counter bore and drill way chamfer bores, including the cutter main part, the cutter main part including consecutive brill stalk portion, ladder drill part and brill point portion, the top middle part of brill point portion open and to have the U-shaped recess, install detachable U in this U-shaped recess and bore the drill point, the outside central symmetry of ladder drill part arranged two chip grooves, this chip groove spiral sets up on ladder drill part lateral wall and extends to drill point portion, the inside wall of chip groove one side be located every ladder department of ladder drill part and all seted up a mounting groove, install detachable chamfer sword grain in this mounting groove. The utility model discloses only use a cutter can accomplish all processing contents, the effectual machining efficiency that has improved satisfies the high efficiency and reaches the processing requirement of lean production.

Description

Stepped drill for machining threaded bottom hole, counter bore and orifice chamfer

Technical Field

The utility model relates to a shoulder hole processing technology field especially relates to a ladder of processing screw thread bottom hole, counter bore and drill way chamfer bores.

Background

With the increasing maturity of machinery manufacturing industry on a global scale, the requirements of machining productivity and efficiency improvement in various countries are higher and higher, and stepped hole machining is used as a compressible and time-saving process.

The traditional stepped hole processing adopts a stepped drill, a U drill and a chamfering tool to process and complete in multiple times, a threaded bottom hole is processed firstly, then a counter bore at the front end of the bottom hole is processed, and finally the processing of an orifice chamfer is carried out. The whole processing efficiency is lower, and the processing requirement of high-efficiency production cannot be met.

Disclosure of Invention

The utility model aims to solve the technical problem that a ladder of processing screw thread bottom hole, counter bore and drill way chamfer is bored is provided, only uses a cutter can accomplish all processing contents, the effectual machining efficiency that has improved, satisfies the high-efficient processing requirement that reaches lean production.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a ladder of processing screw thread bottom hole, counter bore and drill way chamfer bores, including cutter main body, cutter main body including consecutive brill stalk portion, ladder drill portion and brill point portion, the top middle part of brill point portion open and to have the U-shaped recess, install detachable U in this U-shaped recess and bore the drill point, the outside central symmetrical arrangement of ladder drill portion have two chip grooves, this chip groove spiral sets up on ladder drill portion lateral wall and extends to the drill point portion, the inside wall of chip groove one side be located every ladder department of ladder drill portion and all seted up a mounting groove, install detachable chamfer sword grain in this mounting groove.

As a supplement to the technical scheme of the utility model, the top of U bore drill point and the lateral wall of both sides be the cutting edge face.

As a supplement to the technical scheme of the utility model, the chamfer sword grain pass through the umbrella-type screw fixation in the mounting groove.

As a supplement to the technical scheme of the utility model, the U bore the drill point and pass through umbrella-type screw fixation in the U-shaped recess.

Has the advantages that: the utility model relates to a ladder of processing screw thread bottom hole, counter bore and drill way chamfer bores, the cutting edge of ladder drill part processes the screw thread bottom hole, bores the counter bore of drill point processing bottom hole front end through the U of the drill point tip of drill point portion tip, and the chamfer cutter grain of ladder drill part ladder department processes the chamfer of drill way, only uses a cutter can accomplish all processing contents, has effectually improved machining efficiency, satisfies the high-efficient processing requirement that reaches lean production; secondly, the chamfering tool grain and the drill point of the U-shaped drill are detachable, so that the processing cost can be effectively reduced.

Drawings

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

fig. 2 is a schematic structural view of the tool body according to the present invention.

The figure is as follows: 1. the tool comprises a tool body, 2, an umbrella-shaped screw, 3, a chamfering tool grain, 4, a U-shaped drill tip, 5, a drill handle part, 6, a stepped drill part, 7, a mounting groove, 8, a chip groove, 9, a drill tip part, 10 and a U-shaped groove.

Detailed Description

The present invention will be further described with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.

The utility model discloses an embodiment relates to a ladder of processing screw thread bottom hole, counter bore and drill way chamfer bores, as shown in fig. 1-2, including cutter main body 1, cutter main body 1 including consecutive brill stalk portion 5, ladder brill portion 6 and drill point portion 9, the top middle part of drill point portion 9 open and to have U-shaped recess 10, install detachable U in this U-shaped recess 10 and bore drill point 4, the outside central symmetry of ladder brill portion 6 arranged two chip grooves 8, this chip groove 8 spiral sets up on 6 lateral walls of ladder brill portion and extends to drill point portion 9, the inside wall of chip groove 8 one side be located every ladder department of ladder brill portion 6 and all seted up a mounting groove 7, install detachable chamfer sword grain 3 in this mounting groove 7.

As shown in fig. 2, the stepped drill portion 6 has three cutting edges in total, and the cutting diameter is increased in a stepwise manner; the cutting edge of the stepped drill part 6 is used for processing the threaded bottom hole, the counter bore at the front end of the bottom hole is processed by the U-shaped drill tip 4 at the end part of the drill tip part 9, and the chamfer at the orifice of the chamfer cutter grain 3 at the stepped part of the stepped drill part 6 only uses one cutter to complete all processing contents, so that the processing efficiency is effectively improved, and the processing requirement of high-efficiency lean production is met. And secondly, the chamfering tool grain 3 and the U-shaped drill tip 4 are detachable, so that the processing cost can be effectively reduced.

The top end of the U-shaped drill point 4 and the side walls of the two sides are all knife edge surfaces, and the three knife edge surfaces are U-shaped.

The chamfering tool grains 3 are fixed in the mounting groove 7 through umbrella-shaped screws 2, and castings with different requirements can be machined by replacing the chamfering tool grains 3 made of different materials. The U-shaped drill point 4 is fixed in the U-shaped groove 10 through an umbrella-shaped screw 2. The chamfering tool grain 3 and the U-shaped drill point 4 can be taken out only by unscrewing the corresponding umbrella-shaped screw 2, and the chamfering tool grain 3 and the U-shaped drill point 4 are locked by replacing with a new chamfering tool grain 3.

Claims

1. The utility model provides a ladder of processing thread bottom hole, counter bore and drill way chamfer bores, includes cutter main body (1), its characterized in that: cutter main part (1) including consecutive brill stalk portion (5), ladder brill portion (6) and drill point portion (9), the top middle part of drill point portion (9) open there is U-shaped recess (10), install detachable U in this U-shaped recess (10) and bore drill point (4), the outside central symmetry of ladder brill portion (6) arranged two chip grooves (8), this chip groove (8) spiral sets up on ladder brill portion (6) lateral wall and extends to drill point portion (9), the inside wall of chip groove (8) one side be located every ladder department of ladder brill portion (6) and all seted up a mounting groove (7), install detachable chamfer sword grain (3) in this mounting groove (7).

2. The step drill for machining threaded bottom holes, counterbores and bore chamfers of claim 1, wherein: the top end of the U-shaped drill point (4) and the side walls on the two sides are all knife edge surfaces.

3. The step drill for machining threaded bottom holes, counterbores and bore chamfers of claim 1, wherein: the chamfering tool grain (3) is fixed in the mounting groove (7) through an umbrella-shaped screw (2).

4. The step drill for machining threaded bottom holes, counterbores and bore chamfers of claim 1, wherein: the U-shaped drill point (4) is fixed in the U-shaped groove (10) through an umbrella-shaped screw (2).