CN-224209162-U - Step drill bit for vibration-proof deep hole machining

Abstract

The utility model discloses a step drill bit for vibration-proof deep hole machining, which comprises a step drill bit, a drill rod, a flow guide pipe and a clamping mechanism, wherein the drill rod is coaxially fixed at one end of the step drill bit, and the flow guide pipe is coaxially fixed at one end of the drill rod far away from the step drill bit. The utility model has the advantages that the linkage rod is driven by the single air cylinder, and the driven rod convex blocks are respectively driven by the linkage rod to synchronously link, so that the first clamping plate and the second clamping plate can synchronously link without additionally configuring an independent driving unit, the complexity of a clamping mechanism is simplified, the manufacturing cost and the maintenance difficulty of equipment are reduced, the drill rod and the guide pipe are respectively clamped and locked by the first clamping plate and the second clamping plate, the vibration transmission path is effectively blocked, the occurrence of vibration of a stepped drill bit during processing is avoided, the stress distribution of the drill rod and the guide pipe can be balanced by a synchronous clamping mechanism, and the local stress concentration caused by the traditional single-point fixation is avoided.

Inventors

• WANG CHUN
• NIE MINGJIE

Assignees

• 江苏肯度精密工具有限公司

Dates

Publication Date

20260508

Application Date

20250523

Claims (6)

1. 1. The utility model provides a step drill bit is used in deep hole processing of vibration prevention, includes step drill bit (1), drilling rod (2), honeycomb duct (3) and clamping mechanism (4), its characterized in that, drilling rod (2) coaxial fastening is in step drill bit (1) one end, honeycomb duct (3) coaxial fastening is kept away from step drill bit (1) one end on drilling rod (2) to all be provided with the cavity in step drill bit (1), drilling rod (2) inside, honeycomb duct (3) link up with the cavity; The drill rod (2) is connected and locked on the clamping mechanism (4), the clamping mechanism (4) comprises a bearing plate (41), a first clamping plate (42), a clamping head (43), a second clamping plate (44) and a coaxial linkage unit, the first clamping plate (42) and the second clamping plate (44) are both rotationally connected on the bearing plate (41) and are symmetrically provided with two, the second clamping plate (44) is located on the inner side of the first clamping plate (42), the clamping head (43) is fixed at one end of the first clamping plate (42), and the coaxial linkage unit is arranged on the bearing plate (41).
2. 2. The vibration-proof stepped drill for deep hole machining according to claim 1, wherein a rubber column is provided at an end of the second clamping plate (44) near the chuck (43), the rubber column is abutted against the guide pipe (3), and the chuck (43) is abutted against the drill rod (2).
3. 3. The vibration-proof stepped drill bit for deep hole machining according to claim 1, wherein the coaxial linkage unit comprises an air cylinder (45), a linkage rod (46) and a driven rod (47), wherein the air cylinder (45) is fixed at one end of the supporting plate (41), the linkage rod (46) is coaxially fixed with a telescopic part of the air cylinder (45) and is slidingly connected to the supporting plate (41), one end of the driven rod (47) is rotatably connected to the linkage rod (46), and the other end of the driven rod is rotatably connected to one end of the first clamping plate (42).
4. 4. The vibration-proof step drill for deep hole machining according to claim 3, wherein the coaxial linkage unit further comprises a projection (48), the projection (48) is coaxially fixed at one end of the linkage rod (46), and the projection (48) is slidably abutted between two adjacent second clamping plates (44).
5. 5. The vibration-proof stepped drill for deep hole machining according to claim 1, wherein the second clamping plates (44) are provided with positioning pins, and a return spring (49) is engaged between the positioning pins of two adjacent second clamping plates (44).
6. 6. The anti-vibration stepped drill bit for deep hole machining is characterized in that a spiral chip removing groove is formed in the side wall of the stepped drill bit (1), liquid spraying micropores (5) are formed in the chip removing groove, the liquid spraying micropores (5) are communicated with a cavity in the stepped drill bit (1), and a butt joint hose (6) is arranged at one end of the guide pipe (3).

Description

Step drill bit for vibration-proof deep hole machining Technical Field The utility model relates to a step drill, in particular to a step drill for vibration-proof deep hole machining, and belongs to the technical field of step drills. Background In the deep hole processing field, because the degree of depth of processing is big, draw ratio is high, and the cutter is easy to cause overheated, vibration even fracture because of the cutting heat accumulation, the unsmooth and rigidity scheduling problem of chip removal, in order to cope with this challenge, generally adopt ladder drill bit structure among the prior art, it cuts in stages through multistage ladder design in order to reduce single cutting load, integrated inside coolant circulation system simultaneously, carries the coolant liquid to cutting region through the honeycomb duct that the drilling rod afterbody introduced to realize heat dissipation, lubrication and chip removal function. However, in the conventional step drill, for example, in a hollow drill for processing a step deep hole disclosed in publication No. CN216028277U, cooling wax is injected into a drill core, and the drill core is sealed by a seal plug, so that heat dissipation of the drill is facilitated, continuous operation of the drill is realized, and processing efficiency is improved, but in the technical scheme and the conventional step drill, when the step drill is clamped, the tool is generally only applied to the drill rod for fixing, and in order to guide the cooling liquid, the tail end of the drill rod is further provided with a guide pipe, and the guide pipe is generally not provided with an independent constraint structure, so that the guide pipe is easy to be excited by the coupling of the cutting reaction force during processing, radial or axial micro-amplitude vibration is generated, the vibration is transmitted to the cutter body through an assembly gap between the drill rod and the guide pipe, additional disturbance superimposed on the cutting vibration is formed, and the processing precision is seriously affected. Disclosure of utility model The technical scheme of the utility model aims at solving the technical problem that the prior art is too single, provides a solution which is obviously different from the prior art, and particularly aims at solving the defects in the prior art and providing the anti-vibration stepped drill bit for deep hole machining. In order to achieve the above purpose, the present utility model adopts the following technical scheme: The utility model provides a step drill bit is used in deep hole processing of vibration prevention, includes step drill bit, drilling rod, honeycomb duct and clamping mechanism, the drilling rod is coaxial to be fixed in step drill bit one end, the honeycomb duct is coaxial to be fixed in the drilling rod on the one end that keeps away from step drill bit to be provided with the cavity in step drill bit, drilling rod inside, the honeycomb duct link up with the cavity; the drill rod is connected and locked on the clamping mechanism, the clamping mechanism comprises a bearing plate, a first clamping plate, a clamping head, a second clamping plate and a coaxial linkage unit, the first clamping plate and the second clamping plate are both rotationally connected on the bearing plate and are symmetrically arranged two, the second clamping plate is located on the inner side of the first clamping plate, the clamping head is fixed at one end of the first clamping plate, and the coaxial linkage unit is arranged on the bearing plate. As a still further scheme of the utility model, a rubber column is arranged at one end, close to the chuck, of the second clamping plate, the rubber column is in butt joint with the flow guide pipe, and the chuck is in butt joint with the drill rod. As a still further scheme of the utility model, the coaxial linkage unit comprises an air cylinder, a linkage rod and a driven rod, wherein the air cylinder is fixed at one end of a bearing plate, the linkage rod and a telescopic part of the air cylinder are coaxially fixed and are connected to the bearing plate in a sliding manner, one end of the driven rod is rotatably connected to the linkage rod, and the other end of the driven rod is rotatably connected to one end of a first clamping plate. As a still further proposal of the utility model, the coaxial linkage unit also comprises a lug which is coaxially fixed at one end of the linkage rod and is in sliding abutting connection between two adjacent second clamping plates. As a still further proposal of the utility model, the second clamping plates are provided with positioning pins, and a return spring is clamped between the positioning pins of two adjacent second clamping plates. As a still further scheme of the utility model, a spiral chip removing groove is arranged on the side wall of the step drill, a liquid spraying micropore is arranged in the chip removing groove, the liquid spraying