CN215845905U

CN215845905U - Deep hole drill

Info

Publication number: CN215845905U
Application number: CN202122205086.XU
Authority: CN
Inventors: 谭志雄; 陈杰忠
Original assignee: Ninghai Sangang Metal Products Co ltd
Current assignee: Ninghai Sangang Metal Products Co ltd
Priority date: 2021-09-13
Filing date: 2021-09-13
Publication date: 2022-02-18
Anticipated expiration: 2031-09-13

Abstract

The utility model relates to a deep hole drill which comprises a cylindrical cutter body, a cutter head and a cutter handle which are respectively concentrically fixed at the upper end and the lower end of the cylindrical cutter body, and a cutter blade which is embedded and fixed in the end part of the cutter head, wherein the cylindrical cutter body is also provided with a plurality of vibration damping assemblies which are sequentially distributed from top to bottom; the utility model can generate reliable restraint on the cylindrical cutter body by means of the plurality of vibration reduction assemblies so as to ensure that the cylindrical cutter body is always concentric with the deep hole, thereby thoroughly preventing the hole wall from skewing to greatly reduce the reject ratio of deep hole processing, and simultaneously remarkably reducing vibration to effectively reduce processing errors.

Description

Deep hole drill

Technical Field

The utility model relates to a deep hole drill.

Background

In the machining industry, drilling is a very common technological means, and in order to produce holes with various sizes, a machining workshop is often provided with drill bits with various sizes; if need bore when establishing a deep hole, just need use the deep hole to bore, the blade of deep hole drill is longer in order to adapt to the degree of depth in hole, in order to reduce the friction between blade and the pore wall, the external diameter of the blade of current deep hole drill all is less than the internal diameter of deep hole, because lack necessary restraint, the blade can't keep all the time with the concentric position of deep hole when rotatory, lead to the pore wall can take place crooked, cause the defective rate of BTA higher, the vibration is also great moreover, further increase machining error, some treat further improvement.

SUMMERY OF THE UTILITY MODEL

In view of the current situation of the prior art, the technical problem to be solved by the present invention is to provide a deep hole drill which can thoroughly prevent the hole wall from skewing so as to greatly reduce the machining defective rate, and simultaneously, significantly reduce the vibration so as to effectively reduce the machining error.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a deep hole drill comprises a cylindrical cutter body, a cutter head and a cutter handle which are respectively and concentrically fixed at the upper end and the lower end of the cylindrical cutter body, and a blade which is embedded and fixed inside the end part of the cutter head, and is characterized in that a plurality of vibration reduction assemblies which are sequentially distributed from top to bottom are further arranged on the cylindrical cutter body, each vibration reduction assembly comprises a vibration reduction ring and a rolling bearing, the vibration reduction rings are concentrically sleeved and fixed outside the cylindrical cutter body and can move up and down, and the inner rings of the rolling bearings are sleeved and fixed outside the vibration reduction rings; the outer wall of the cylindrical knife body is provided with vertically distributed right-angle notch grooves.

Preferably, the outer diameter of the tool shank is smaller than the outer diameter of the cylindrical tool body.

Preferably, the outer ring outer diameter of the rolling bearing is matched with the rotation diameter of the blade.

Compared with the prior art, the utility model has the advantages that: the utility model can generate reliable restraint on the cylindrical cutter body by means of the plurality of vibration reduction assemblies so as to ensure that the cylindrical cutter body is always concentric with the deep hole, thereby thoroughly preventing the hole wall from skewing to greatly reduce the reject ratio of deep hole processing, and simultaneously remarkably reducing vibration to effectively reduce processing errors.

Drawings

Fig. 1 is a top view of the present invention.

Detailed Description

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the embodiments of the present invention clear and concise, a detailed description of known functions and known components of the utility model have been omitted.

As shown in fig. 1, a deep hole drill comprises a cylindrical cutter body 1, a cutter head 3 and a cutter handle 2 which are concentrically fixed at the upper end and the lower end of the cylindrical cutter body 1 respectively, and a blade 5 which is embedded and fixed in the end part of the cutter head 3, wherein the cylindrical cutter body 1 is also provided with a plurality of vibration reduction assemblies 4 which are sequentially distributed from top to bottom, each vibration reduction assembly 4 comprises a damping ring 41 and a rolling bearing 42, the damping rings 41 are concentrically sleeved and fixed on the outer part of the cylindrical cutter body 1 and can move up and down, and the inner ring of the rolling bearing 42 is sleeved and fixed on the outer part of the damping ring 41; the outer wall of the cylindrical knife body 1 is provided with vertically distributed right-angle notch grooves 11.

The outer diameter of the knife handle 2 is smaller than that of the cylindrical knife body 1.

The outer ring outer diameter of the rolling bearing 42 is matched with the revolution diameter of the blade 5.

When in use: inserting and fixing the tool shank 2 into a chuck of a machine tool, and after the machine tool is started, a motor in the machine tool can drive the tool shank 2 to rotate by means of the chuck, and further drive the blade 5 to rotate by means of the cylindrical tool body 1 and the tool bit 3; then, the cutter head 3 is slowly fed towards the direction of the workpiece to start drilling the workpiece by the aid of the blade 5, and further a hole is drilled in the workpiece, along with the continuous feeding of the cutter head 3, the plurality of vibration reduction assemblies 4 on the cylindrical cutter body 1 start to sequentially enter the hole, after the rolling bearings 42 in the vibration reduction assemblies 4 enter the hole, the outer rings of the rolling bearings 42 are attached to the inner wall of the hole and cannot rotate, so that the cylindrical cutter body 1 and the hole are always concentric to effectively reduce vibration, and because the inner rings and the outer rings of the rolling bearings 42 can rotate relatively, the cylindrical cutter body 1 can still rotate in the hole by the aid of the damping rings 41 to ensure the continuous drilling, scraps generated in the drilling process exist in the hole firstly and then are discharged outwards through the right-angle notch grooves 11, and because gaps exist between each damping ring 41 and the right-angle notch grooves 11, the discharge of the waste chips is not affected even if the damper ring 41 is inserted into the hole.

The number of the vibration reduction assemblies 4 can be increased or decreased according to the depth of the holes, and when the number is increased or decreased, the vibration reduction assemblies 4 are pushed to move towards the tool holder 2, and finally the cylindrical tool body 1 is separated from the tool holder 2; the position of the damping assembly 4 can also be adjusted according to the requirement, and when adjusting, the damping ring 41 in each damping assembly 4 is pushed to slide along the cylindrical cutter body 1.

The utility model can generate reliable restraint on the cylindrical cutter body 1 by means of the plurality of vibration reduction assemblies 4 so as to ensure that the cylindrical cutter body 1 is always concentric with the deep hole, thereby thoroughly preventing the hole wall from skewing to greatly reduce the reject ratio of deep hole processing, and simultaneously remarkably reducing vibration to effectively reduce processing errors.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A deep hole drill comprises a cylindrical cutter body, a cutter head and a cutter handle which are respectively and concentrically fixed at the upper end and the lower end of the cylindrical cutter body, and a blade which is embedded and fixed inside the end part of the cutter head, and is characterized in that a plurality of vibration reduction assemblies which are sequentially distributed from top to bottom are further arranged on the cylindrical cutter body, each vibration reduction assembly comprises a vibration reduction ring and a rolling bearing, the vibration reduction rings are concentrically sleeved and fixed outside the cylindrical cutter body and can move up and down, and the inner rings of the rolling bearings are sleeved and fixed outside the vibration reduction rings; the outer wall of the cylindrical knife body is provided with vertically distributed right-angle notch grooves.

2. The gun drill of claim 1, wherein the shank has an outer diameter less than the outer diameter of the cylindrical body.

3. A deep hole drill according to claim 1, wherein the outer diameter of the outer ring of the rolling bearing is matched to the diameter of revolution of the cutting insert.