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CN-224209160-U - Sectional type ladder drill bit with coating wear resistance reinforcing structure

CN224209160UCN 224209160 UCN224209160 UCN 224209160UCN-224209160-U

Abstract

The utility model belongs to the technical field of drill bits, and particularly relates to a stepped drill bit with a coating wear resistance reinforcing structure, which aims at solving the problems that most of existing stepped drill bits are inconvenient to dissipate heat when in use, heat generated during the work of the drill bit cannot be timely dissipated, and overheated drill bits easily influence the processing quality of a workpiece. According to the utility model, the heat generated during the operation of the drill bit body can be absorbed through the heat pipe, the heat is transferred to the heat exchange liquid in the liquid storage cavity, the heat dissipation plate is synchronously driven to rotate through the rotation of the drill bit fixing handle, and the heat conduction plate absorbs the heat in the heat exchange liquid and transfers the heat to the heat dissipation plate, so that the heat dissipation plate performs convection heat dissipation with air during the rotation of the heat dissipation plate, the drill bit body is indirectly cooled, and the practicability is improved.

Inventors

  • NIE MINGJIE
  • WANG CHUN

Assignees

  • 江苏肯度精密工具有限公司

Dates

Publication Date
20260508
Application Date
20250507

Claims (7)

  1. 1. The stepped drill bit with the coating wear resistance reinforcing structure comprises a drill bit fixing handle (1) and is characterized in that anti-slip lines (2) are arranged on the outer surface of the drill bit fixing handle (1), a cooling mechanism for cooling a drill bit is arranged in the drill bit fixing handle (1), and a cutting mechanism for cutting a workpiece is arranged at one end of the drill bit fixing handle (1); The cooling mechanism comprises a liquid storage cavity (3), the liquid storage cavity (3) is formed in the drill bit fixing handle (1), a connecting groove (31) formed in the tail end of the drill bit fixing handle (1) is formed in the left side of the liquid storage cavity (3), a heat pipe (32) is connected in an inserted mode in the connecting groove (31), a heat conducting plate (34) is fixed to the inner wall of the drill bit fixing handle (1), and four groups of cooling fins (35) are fixed to the outer surface of the heat conducting plate (34).
  2. 2. The stepped drill bit with the coating wear resistance reinforcing structure according to claim 1, wherein a limit ring (33) in abutting connection with a heat pipe (32) is fixed on the inner wall of the connecting groove (31).
  3. 3. The stepped drill bit provided with the coating wear resistance reinforcing structure in a sectional manner according to claim 2, wherein the cutting mechanism comprises a drill bit body (4), the drill bit body (4) is mounted on the outer surface of the heat pipe (32), and the outer wall of the drill bit body (4) is coated with a wear resistant coating (41).
  4. 4. A stepped drill bit with a coating wear resistance reinforcing structure according to claim 3, characterized in that the wear-resistant coating (41) is made of titanium nitride material, and chip grooves (42) are formed in the outer surface of the drill bit body (4).
  5. 5. The stepped drill bit with the coating wear resistance reinforcing structure according to claim 4, wherein a fixing bolt (43) is installed in the drill bit body (4), a limiting hole (44) formed in the heat pipe (32) is spliced and connected at the tail end of the fixing bolt (43), and a fixing groove (45) spliced and connected with the heat pipe (32) is formed in the inner wall of the drill bit body (4).
  6. 6. The stepped drill bit with the coating wear resistance reinforcing structure according to claim 5, wherein the upper surface of the heat pipe (32) is provided with a connecting hole (5), and a limit rod (6) in telescopic connection with the drill bit fixing handle (1) is connected in an inserted manner in the connecting hole (5).
  7. 7. The stepped drill bit with the coating wear resistance reinforcing structure according to claim 6, wherein the outer surface of the limiting rod (6) is sleeved with a compression spring (7), and the lower surface of the compression spring (7) is abutted with a movable ring (8) fixedly connected with the limiting rod (6).

Description

Sectional type ladder drill bit with coating wear resistance reinforcing structure Technical Field The utility model relates to a stepped drill bit, in particular to a stepped drill bit with a coating wear resistance reinforcing structure in a sectional mode, and belongs to the technical field of drill bits. Background Stepped drill bits, also known as step drills or pagoda drills, are a specially designed drilling tool. The drill bit is mainly characterized in that a plurality of cutting edges or cutting sections with different diameters are arranged on the drill bit body, and the cutting edges or the cutting sections are arranged in sequence from small to large to form a ladder-shaped structure. In the drilling process, cutting edges or cutting sections with different diameters can be selected for cutting according to requirements, so that holes with different diameters can be machined at one time, and the working efficiency and the machining flexibility are greatly improved. In the prior art, a stepped drill bit as disclosed in publication number CN211464929U includes a shank extending along a bit axis and a body having a proximal end adjacent the shank and a distal end opposite the proximal end. The body defines a plurality of axially stacked, progressively larger steps including a first step at a distal end and a terminal step at the proximal end. The drill bit also includes flutes located in the body. The flutes define elongate grooves extending from the distal end to the proximal end. It helps to increase the speed and life of the step bit by the ratio between the helix angle and rake angle of the cutting edges of the steps on the step bit. In the technical mode, the speed and the service life of the step drill are improved by the proportion between the spiral angles and the front angles of the cutting edges of the steps on the step drill, but most of step drill is inconvenient to radiate when in use, so that heat generated during the operation of the drill cannot be radiated in time, the overheated drill is easy to influence the processing quality of a workpiece, and in view of the defects, the step drill with the coating abrasion resistance reinforcing structure in a sectional mode is provided. Disclosure of utility model The utility model provides the stepped drill bit with the coating wear resistance reinforcing structure in a sectional mode, which aims to solve the problems that most of stepped drill bits are inconvenient to radiate when in use, heat generated during the work of the drill bit cannot be radiated in time, and the overheated drill bit easily influences the processing quality of a workpiece. The stepped drill bit with the coating wear resistance reinforcing structure comprises a drill bit fixing handle, wherein anti-skid lines are arranged on the outer surface of the drill bit fixing handle, a cooling mechanism for cooling a drill bit is arranged in the drill bit fixing handle, and a cutting mechanism for cutting a workpiece is arranged at one end of the drill bit fixing handle; The cooling mechanism comprises a liquid storage cavity, the liquid storage cavity is arranged in the drill bit fixing handle, a connecting groove arranged at the tail end of the drill bit fixing handle is formed in the left side of the liquid storage cavity, a heat pipe is connected in an inserted mode in the connecting groove, a heat conducting plate is fixed on the inner wall of the drill bit fixing handle, and four groups of cooling fins are fixed on the outer surface of the heat conducting plate. As a still further proposal of the utility model, the inner wall of the connecting groove is fixed with a limit ring which is connected with the heat pipe in an abutting way. As a still further proposal of the utility model, the cutting mechanism comprises a drill bit body which is arranged on the outer surface of the heat pipe, and the outer wall of the drill bit body is coated with a wear-resistant coating. As a still further proposal of the utility model, the wear-resistant coating is made of titanium nitride material, and the outer surface of the drill bit body is provided with junk slots. As a still further scheme of the utility model, a fixing bolt is arranged in the drill bit body, the tail end of the fixing bolt is connected with a limiting hole formed in the heat pipe in a plug-in manner, and the inner wall of the drill bit body is provided with a fixing groove connected with the heat pipe in a plug-in manner. As a still further proposal of the utility model, the upper surface of the heat pipe is provided with a connecting hole, and the inside of the connecting hole is connected with a limiting rod which is connected with the drill bit fixing handle in a telescopic way in an inserting way. As a still further proposal of the utility model, the outer surface of the limiting rod is sleeved with a compression spring, and the lower surface of the compression spring is abutted with a movable ring fixedly con