CN219665214U

CN219665214U - Self-centering drill

Info

Publication number: CN219665214U
Application number: CN202320831117.9U
Authority: CN
Inventors: 周磊; 高寒雪; 洪陈濠
Original assignee: Zhejiang Rongkexiangyuan Machinery Technology Co ltd
Current assignee: Zhejiang Rongkexiangyuan Machinery Technology Co ltd
Priority date: 2023-04-07
Filing date: 2023-04-07
Publication date: 2023-09-12
Anticipated expiration: 2033-04-07

Abstract

The utility model provides a self-centering drill, which belongs to the technical field of machining tools and comprises the following components: the drill body is provided with a cutting end face at one end, the side face, close to the cutting end face, of the drill body is provided with a cutting side face, the cutting side face comprises a cutting face and a supporting face, and the cutting face is arranged adjacent to the supporting face; the cutting heads are embedded in the cutting surface, and the outermost cutting head protrudes out of the supporting surface; the centering block is embedded in the supporting surface and protrudes out of the supporting surface, and the size of the centering block protruding out of the supporting surface is smaller than that of the outermost cutting blade head protruding out of the supporting surface. The utility model has the beneficial effects that: the self-centering drill can ensure better straightness when drilling deep holes, and the machined aperture is more accurate.

Description

Self-centering drill

Technical Field

The utility model belongs to the technical field of machining tools, and particularly relates to a self-centering drill.

Background

When machining parts in a mechanical factory, drilling accounts for 30% -40% of the total machining amount, requirements on hole size precision and the like in machining parts of mechanical products are increasingly improved along with the progress of scientific technology, and deep holes are required to be machined on parts in many industries at present.

For example, chinese patent application No. 201720461163.9 discloses a deep hole combined machining tool, which comprises a tool bar and a drill bit, wherein the drill bit is connected with the tool bar through a boss, a main body is mounted on a main shaft, the main body is fixed through a nut, a clamp is mounted at the top end of the main shaft, a groove is formed in the tool holder, a fixing screw for fixing the drill bit is arranged on the tool holder, a plurality of annular scrapers are mounted on a scraper support frame at intervals, a lubricating plate is mounted at two ends of the scraper support frame, and a support pad is arranged between the left-end lubricating plate and the nut.

The drill in the prior art can also process deep holes, but the rod body can shake left and right along with the deep hole drilling of the drill, so that the straightness of the processed deep holes is poor, and the diameter of the deep holes is also larger. Therefore, there is a great room for improvement in view of the above-mentioned technical problems.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides a self-centering drill.

The aim of the utility model can be achieved by the following technical scheme: a self-centering drill, comprising:

the drill body is provided with a cutting end face at one end, the side face, close to the cutting end face, of the drill body is provided with a cutting side face, the cutting side face comprises a cutting face and a supporting face, and the cutting face is arranged adjacent to the supporting face;

the cutting heads are embedded in the cutting surface, and the outermost cutting head protrudes out of the supporting surface;

the centering block is embedded in the supporting surface and protrudes out of the supporting surface, and the size of the centering block protruding out of the supporting surface is smaller than that of the outermost cutting blade head protruding out of the supporting surface.

Preferably, the drill further comprises a pilot drill for positioning and guiding, wherein the pilot drill is convexly arranged at the center of the cutting end face of the drill body.

Preferably, the cutting surface comprises a first cutting surface and a second cutting surface, the supporting surface comprises a first supporting surface and a second supporting surface, and the first cutting surface and the second cutting surface, the first supporting surface and the second supporting surface are all arranged in central symmetry.

Preferably, the number of the centering blocks is at least two, and the first supporting surface and the second supporting surface are each provided with at least one centering block.

Preferably, the centering block is provided in a rectangular parallelepiped shape.

Preferably, the deep hole drilling device further comprises a long rod body for drilling the deep hole, and the long rod body is detachably connected with the drill body.

Preferably, the outer circumferential surface of the long rod body is provided with a spiral part for guiding scraps.

Compared with the prior art, the utility model has the beneficial effects that:

1. this from centering bores is provided with the centering piece in the holding surface protrusion to the size of centering piece protrusion holding surface is less than the size of cutting knife head protrusion in the holding surface of outermost, just so can guarantee to bore the clearance of body and pore wall very little, thereby bore the body even follow drilling ground go deep also can not appear the condition of rocking and guarantee to bore the body decurrent focus and be located the middle part of boring the body all the time, that is to say that this from centering bores can guarantee that the straightness accuracy is better when boring the deep hole, and the aperture of processing out is also more accurate.

2. The center position of the hole can be well confirmed through the pilot drill, and the accuracy of drilling is greatly improved.

3. The number of the centering blocks is two, one centering block is arranged on the first supporting surface, and the other centering block is arranged on the second supporting surface, so that no matter how the drill body rotates, the small gap between the drill body and the hole wall can be always ensured, and the shaking is reduced.

4. Many scraps can be generated when deep holes are drilled, in order to prevent the generated scraps from being excessive and clamping the drill body, the spiral part is specially arranged and is distributed on the outer circumferential surface of the whole long rod body, and therefore scraps generated when the drill body is cut can be discharged through the spiral part.

Drawings

Fig. 1 is a schematic structural view of a drill body of the self-centering drill according to one embodiment of the present utility model.

Fig. 2 is an elevation view of the drill body of the self-centering drill of the present utility model.

Fig. 3 is a schematic structural view of another view of the drill body of the self-centering drill of the present utility model.

Fig. 4 is a schematic structural view of the self-centering drill body of the present utility model after being connected to a rod body.

In the figure, 100, the drill body; 110. cutting the end face; 121. a cutting face; 1211. a first cutting surface; 1212. a second cutting face; 122. a support surface; 1221. a first support surface; 1222. a second support surface; 200. a cutting bit; 300. a centering block; 400. a pilot drill; 500. a long rod body; 510. a spiral part.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1-3, a self-centering drill, comprising: the drill body 100, the cutting bit 200 and the centering block 300, wherein the cutting bit 200 is used for drilling, and the centering block 300 is used for enabling the center of gravity of cutting of the drill body 100 to be always located in the middle of the drill body 100 during hole machining.

Specifically, one end of the drill body 100 is provided with a cutting end face 110, a side face of the drill body 100 close to the cutting end face 110 is provided with a cutting side face, the cutting side face comprises a cutting face 121 and a supporting face 122, and the cutting face 121 is arranged adjacent to the supporting face 122;

a plurality of cutting bits 200, each cutting bit 200 being embedded in the cutting surface 121, and an outermost cutting bit 200 protruding from the supporting surface 122;

the centering block 300 is embedded in the supporting surface 122, and the centering block 300 protrudes out of the supporting surface 122, and the size of the protruding supporting surface 122 of the centering block 300 is smaller than that of the protruding supporting surface 122 of the outermost cutting bit 200.

It should be noted that, in the prior art, after the protruding portion of the outermost cutting bit 200 (as shown in fig. 2) is machined, a larger gap exists between the supporting surface 122 and the hole wall, then the supporting surface 122 of the drill body 100 is deepened continuously along with the drilling, at this time, the supporting surface 122 of the drill body 100 inevitably collides with the formed hole wall, so that the drill body 100 is rocked and is tilted, and thus the straightness of the deep hole machined is not good, the self-centering drill is provided with the centering block 300 protruding from the supporting surface 122, and the size of the protruding supporting surface 122 of the centering block 300 is smaller than the size of the protruding supporting surface 122 of the outermost cutting bit 200, so that the gap between the drill body 100 and the hole wall is very small, even if the drill body 100 is deep along with the drilling, the condition of shaking does not occur, so that the downward center of gravity of the drill body 100 is always located in the middle of the drill body 100, that is better straightness can be guaranteed when the self-centering drill is used for drilling the deep hole, and the machined hole diameter is more accurate.

As shown in fig. 1 to 3, the self-centering drill is further provided with a pilot drill 400 for positioning and guiding, and the pilot drill 400 is provided to protrude from the center of the cutting end face 110 of the drill body 100.

It should be noted that, in the process of actually drilling, the pilot drill 400 is aligned to the middle part of the hole to be processed, then the pilot drill 400 starts working first, after the pilot drill 400 processes for a period of time, the cutting bit 200 performs the hole processing formally, and the center position of the hole can be better confirmed through the pilot drill 400, so that the accuracy of drilling is greatly increased.

As shown in fig. 1-3, cutting surface 121 includes a first cutting surface 1211 and a second cutting surface 1212, and support surface 122 includes a first support surface 1221 and a second support surface 1222, where first cutting surface 1211 and second cutting surface 1212, and first support surface 1221 and second support surface 1222 are all disposed centrally and symmetrically.

It should be noted that, the first cutting surface 1211 and the second cutting surface 1212, and the first supporting surface 1221 and the second supporting surface 1222 are all disposed in central symmetry, which can further increase the accuracy of drilling.

Further, the number of the centering blocks 300 is set to at least two, and the first support surface 1221 and the second support surface 1222 are each provided with at least one centering block 300. In the present embodiment, the number of the centering blocks 300 is two, one centering block 300 is disposed on the first supporting surface 1221, and the other centering block 300 is disposed on the second supporting surface 1222, so that no matter how the drill body 100 rotates, the small gap between the drill body 100 and the hole wall can be ensured all the time, and the shake is reduced.

Further, the centering block 300 is provided in a rectangular parallelepiped shape.

As shown in fig. 4, the self-centering drill is further provided with a long rod 500 for drilling deep holes, and the long rod 500 is detachably connected with the drill body 100.

The long rod 500 allows the drill body 100 to perform deep hole processing.

Further, the outer circumferential surface of the long rod body 500 is provided with a screw portion 510 for guiding chips.

It should be noted that, many chips are necessarily generated when deep holes are drilled, and in order to prevent excessive chips from being generated and thus the drill body 100 from being caught, a screw portion 510 is specially provided, and the screw portion 510 is disposed over the entire outer circumferential surface of the long rod body 500, so that chips generated when the drill body 100 is cut can be discharged through the screw portion 510.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to herein as "first," "second," "a," and the like are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or an implicit indication of the number of features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.

Claims

1. A self-centering drill, comprising:

2. The self-centering drill as claimed in claim 1, wherein: the drill body is characterized by further comprising a guide drill for positioning and guiding, wherein the guide drill is convexly arranged in the center of the cutting end face of the drill body.

3. The self-centering drill as claimed in claim 1, wherein: the cutting face includes first cutting face and second cutting face, the holding surface includes first holding surface and second holding surface, first cutting face with the second cutting face, first holding surface with the equal central symmetry of second holding surface sets up.

4. A self-centering drill as claimed in claim 3, wherein: the number of the centering blocks is at least two, and the first supporting surface and the second supporting surface are both provided with at least one centering block.

5. The self-centering drill as claimed in claim 4, wherein: the centering block is arranged in a cuboid shape.

6. The self-centering drill as claimed in claim 1, wherein: the deep hole drilling device further comprises a long rod body used for drilling the deep hole, and the long rod body is detachably connected with the drill body.

7. The self-centering drill as claimed in claim 6, wherein: the outer peripheral surface of the long rod body is provided with a spiral part for guiding scraps.