A high-efficiency drilling tool suitable for small-diameter deep holes

Abstract

The application discloses a high-efficiency drilling tool suitable for small-diameter deep holes and belongs to the field of mechanical machining, which comprises a drill rod, a drilling mechanism is arranged at the top of the drill rod, a positioning mechanism is arranged between the drilling mechanism and the drill rod, a cooling mechanism is arranged in the drill rod, the cooling mechanism comprises a communication block, the communication block is rotationally connected with the drill rod, a communication pipe is fixedly connected to one side of the communication block, a communication groove is formed in the drill rod, and the communication groove is communicated with the communication pipe. The communication groove and the communication pipe are communicated through the communication block, the cooling liquid is delivered to the inside of the communication groove through the communication pipe, the drill bit is cooled through the spray hole, and the iron filings in the drilling hole are flushed out, so that the traditional drilling method cannot quickly discharge the iron filings from the drilling hole, the built-up edge is prone to being generated in the drilling hole, and the problems of aggravating tool wear and reducing machining quality are caused, and the practicability is improved.

Description

Technical Field

[0001] This application relates to the field of machining technology, and in particular to a high-efficiency drilling tool suitable for small-diameter deep holes. Background Technology

[0002] Deep hole drilling is a crucial machining process, especially in aerospace and precision instrument industries, where extremely high precision and efficiency are required for deep hole machining. Currently, deep hole drilling technologies mainly include gun drilling, BTA drilling, and jet drilling.

[0003] Currently, traditional drilling methods generate iron filings during deep hole machining. These filings cannot be quickly removed from the borehole, leading to the formation of built-up edge inside the borehole, which in turn causes increased tool wear and reduced machining quality. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides a high-efficiency drilling tool suitable for small-diameter deep holes, which overcomes the shortcomings of the prior art and aims to solve the problems in the background art.

[0005] To achieve the above objectives, this application adopts the following technical solution: a high-efficiency drilling tool suitable for small-diameter deep holes, comprising a drill rod, a drilling mechanism at the top of the drill rod, a positioning mechanism between the drilling mechanism and the drill rod, a cooling mechanism inside the drill rod, the cooling mechanism comprising a connecting block, the connecting block being rotatably connected to the drill rod, a connecting pipe being fixedly connected to one side of the connecting block, a connecting groove being opened inside the drill rod, the connecting groove being connected to the connecting pipe, a spray hole being opened on the side of the connecting groove away from the connecting block, and a micro bolt being threadedly connected to the surface of the drill rod.

[0006] In a preferred embodiment, the drilling mechanism includes a drill bit that is slidably connected to a drill rod, a cutting edge that is fixedly connected to the surface of the drill bit, and a chip removal groove that is formed on the surface of the drill bit.

[0007] By adopting the above technical solution, deep hole machining is performed using a drill bit, and the cutting edge on the surface of the drill bit, in conjunction with the chip removal groove, forms a continuous spiral thrust during the cutting process to remove the chips, thus achieving better chip removal.

[0008] In a preferred embodiment, the drill bit has a double-apex design, the cutting edge is helical, and the surface of the chip removal groove is fixedly connected with a nano-coating, which is a diamond coating.

[0009] By adopting the above technical solution, the double-apex design of the drill bit reduces the contact area between the drill tip and the workpiece, thereby reducing cutting resistance. The spiral cutting edge facilitates the cooperation with the chip removal groove to remove chips. Furthermore, the surface of the chip removal groove is fixedly connected with a nano-coating, which reduces the friction and wear between the chips and the groove wall, extends the service life of the chip removal groove, and enables better deep hole machining.

[0010] In a preferred embodiment, guide strips are fixedly connected to the surface of the drill rod, and four guide strips are provided, which are distributed symmetrically in a cross shape on the surface of the drill rod.

[0011] By adopting the above technical solution, four guide bars are symmetrically distributed on the surface of the drill rod in a cross shape. When the guide bars come into contact with the hole wall, they can offset the radial load force during the drilling process in real time, thus providing better support for the drill rod.

[0012] In a preferred embodiment, the positioning mechanism includes an insertion block, which is fixedly connected to the drill rod. A spring is fixedly connected inside the insertion block, and a positioning rod is fixedly connected to one side of the spring. The positioning rod is slidably connected to the insertion block.

[0013] By adopting the above technical solution, the drill bit is positioned by inserting the insertion block into the drill bit to facilitate the installation of miniature bolts. The positioning rod is then supported by a spring and inserted into the drill bit to position the insertion block. When it is necessary to release the positioning, the positioning rod is pressed to allow it to enter the insertion block, thus releasing the positioning of the drill bit. This method allows for better positioning of the drill bit and facilitates the installation of miniature bolts.

[0014] In a preferred embodiment, the surface of the drill bit is provided with a slot that is adapted to the insertion block, the surface of the drill bit is provided with a limiting groove that is adapted to the positioning rod, and an O-ring is provided between the drill rod and the drill bit.

[0015] By adopting the above technical solution, a slot is provided on the surface of the drill bit to facilitate the insertion of the insertion block into the inside of the drill bit. A limiting groove is provided on the surface of the drill bit to facilitate the positioning rod to be limited. An O-ring is provided between the drill rod and the drill bit to enhance the sealing performance between the drill rod and the drill bit, which can better connect the drill rod and the drill bit.

[0016] In a preferred embodiment, the surface of the insertion block is provided with mounting holes that are adapted to fit miniature bolts.

[0017] By adopting the above technical solution, mounting holes are opened on the surface of the insert block, and the micro bolt is rotated to pass through the drill bit and enter the mounting hole on the surface of the insert block to connect the drill rod and the drill bit, which can better connect the drill rod and the drill bit.

[0018] The beneficial effects of this application are: 1. This is a high-efficiency drilling tool suitable for small-diameter deep holes. By setting up a spray hole, a connecting groove, a connecting pipe, and a connecting block, the connecting block connects the connecting groove and the connecting pipe. The connecting pipe then delivers coolant to the inside of the connecting groove, and the coolant is sprayed out from the spray hole to cool the drill bit and flush out the iron filings inside the drill hole. This avoids the problem of traditional drilling methods, which cannot quickly remove iron filings from the drill hole, leading to the formation of built-up edge inside the drill hole, which causes accelerated tool wear and reduced machining quality. This improves the practicality of the tool.

[0019] 2. This high-efficiency drilling tool suitable for small-diameter deep holes features an insert block, spring, and positioning rod. The insert block is inserted into the drill bit to position it for easy installation of micro-bolts. The spring supports the positioning rod, which is then inserted into the drill bit to position the insert block. To release the positioning, the positioning rod is pressed into the insert block, thus releasing the drill bit's position. This facilitates easy installation and removal of the drill bit, avoiding the problem of traditional deep-hole drilling tools being unable to quickly install and remove drill bits, thus improving practicality. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the front structure of this application; Figure 2 This is a schematic diagram of the cooling mechanism structure of this application; Figure 3 This is a sectional view of the drill pipe structure of this application; Figure 4 For this application Figure 3 An enlarged schematic diagram of the structure at point A.

[0021] Explanation of reference numerals in the attached figures: 1. Drill rod; 2. Drilling mechanism; 21. Drill bit; 22. Cutting edge; 23. Chip removal groove; 3. Cooling mechanism; 31. Spray hole; 32. Connecting groove; 33. Connecting pipe; 34. Connecting block; 4. Positioning mechanism; 41. Insertion block; 42. Spring; 43. Positioning rod; 5. Miniature bolt; 6. Guide bar. Detailed Implementation

[0022] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0023] Reference Figures 1-4A high-efficiency drilling tool suitable for small-diameter deep holes includes a drill rod 1, a drilling mechanism 2 at the top of the drill rod 1, a positioning mechanism 4 between the drilling mechanism 2 and the drill rod 1, a cooling mechanism 3 inside the drill rod 1, the cooling mechanism 3 including a connecting block 34, the connecting block 34 being rotatably connected to the drill rod 1, a connecting pipe 33 being fixedly connected to one side of the connecting block 34, a connecting groove 32 being opened inside the drill rod 1, the connecting groove 32 being connected to the connecting pipe 33, a spray hole 31 being opened on the side of the connecting groove 32 away from the connecting block 34, and a micro bolt 5 being threadedly connected to the surface of the drill rod 1.

[0024] Reference Figures 1-2 The drilling mechanism 2 includes a drill bit 21, which is slidably connected to the drill rod 1. A cutting edge 22 is fixedly connected to the surface of the drill bit 21, and a chip removal groove 23 is formed on the surface of the drill bit 21. Deep hole machining is performed by the drill bit 21, and the cutting edge 22 on the surface of the drill bit 21, in conjunction with the chip removal groove 23, forms a continuous spiral thrust during the cutting process to remove the chips, which can better remove the chips.

[0025] Reference Figures 1-2 The drill bit 21 has a double-apex design, the cutting edge 22 is helical, and the surface of the chip removal groove 23 is fixedly connected with a nano-coating, which is a diamond coating. The double-apex design of the drill bit 21 reduces the contact area between the drill tip and the workpiece to reduce cutting resistance. The helical cutting edge 22 facilitates the cooperation with the chip removal groove 23 to remove chips. The nano-coating fixedly connected to the surface of the chip removal groove 23 reduces the friction and wear between the chips and the groove wall, extends the service life of the chip removal groove 23, and can better perform deep hole machining.

[0026] Reference Figures 1-4 A guide bar 6 is fixedly connected to the surface of the drill rod 1. There are four guide bars 6, which are symmetrically distributed in a cross shape on the surface of the drill rod 1. The four guide bars 6 are symmetrically distributed in a cross shape on the surface of the drill rod 1. When the guide bars 6 come into contact with the hole wall, they can offset the radial load force during the drilling process in real time, and can better support the drill rod 1.

[0027] Reference Figures 2-4 The positioning mechanism 4 includes an insertion block 41, which is fixedly connected to the drill rod 1. A spring 42 is fixedly connected inside the insertion block 41, and a positioning rod 43 is fixedly connected to one side of the spring 42. The positioning rod 43 is slidably connected to the insertion block 41. By inserting the insertion block 41 into the drill bit 21, the drill bit 21 is positioned to facilitate the installation of the micro bolt 5. The spring 42 supports the positioning rod 43, and the positioning rod 43 is inserted into the drill bit 21 to position the insertion block 41. When it is necessary to release the positioning, the positioning rod 43 is pressed to allow the positioning rod 43 to enter the insertion block 41, thereby releasing the positioning of the drill bit 21. This allows for better positioning of the drill bit 21 and facilitates the installation of the micro bolt 5.

[0028] Reference Figures 2-4 The drill bit 21 has a slot on its surface that matches the insertion block 41. The drill bit 21 also has a limiting groove that matches the positioning rod 43. An O-ring seal is provided between the drill rod 1 and the drill bit 21. The slot on the surface of the drill bit 21 facilitates the insertion of the insertion block 41 into the drill bit 21. The limiting groove on the surface of the drill bit 21 facilitates the limiting of the positioning rod 43. The O-ring seal between the drill rod 1 and the drill bit 21 enhances the sealing performance between them, allowing for a better connection between the drill rod 1 and the drill bit 21.

[0029] Reference Figure 2 The surface of the insertion block 41 is provided with mounting holes, which are adapted to the micro bolts 5. By rotating the micro bolts 5 through the mounting holes on the surface of the insertion block 41, the micro bolts 5 pass through the drill bit 21 and enter the mounting holes on the surface of the insertion block 41, thereby connecting the drill rod 1 and the drill bit 21. This allows for a better connection between the drill rod 1 and the drill bit 21.

[0030] Working principle: The drill bit 21 is positioned by inserting the insertion block 41 into the drill bit 21. Then, the micro bolt 5 is rotated to pass through the drill bit 21 and enter the mounting hole on the surface of the insertion block 41, connecting the drill rod 1 to the drill bit 21. The positioning rod 43 is supported by the spring 42 and then inserted into the drill bit 21 to position the insertion block 41. To release the positioning, the positioning rod 43 is pressed to enter the insertion block 41. Inside the hole, the positioning of the drill bit 21 can be released, and the drill rod rotates and feeds to drive the drill bit 21 to perform deep hole machining. The cutting edge 22 on the surface of the drill bit 21, together with the chip removal groove 23, forms a continuous spiral thrust during the cutting process to remove the chips. The connecting block 34 connects the connecting groove 32 and the connecting pipe 33, and the connecting pipe 33 delivers coolant to the inside of the connecting groove 32. The coolant is then sprayed out through the nozzle 31 to cool the drill bit 21 and flush out the iron filings inside the hole.

[0031] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] The present invention has been described above with reference to specific embodiments. However, those skilled in the art should understand that these descriptions are exemplary and not intended to limit the scope of protection of the present invention. Those skilled in the art can make various modifications and variations to the present invention based on its spirit and principles, and these modifications and variations are also within the scope of the present invention.

Claims

1. A high efficiency drilling tool for small diameter deep holes comprising a drill rod (1) characterized in that, The top of the drill rod (1) is provided with a drilling mechanism (2), and a positioning mechanism (4) is provided between the drilling mechanism (2) and the drill rod (1). The inside of the drill rod (1) is provided with a cooling mechanism (3). The cooling mechanism (3) includes a connecting block (34). The connecting block (34) is rotatably connected to the drill rod (1). A connecting pipe (33) is fixedly connected to one side of the connecting block (34). A connecting groove (32) is opened inside the drill rod (1). The connecting groove (32) is connected to the connecting pipe (33). A spray hole (31) is opened on the side of the connecting groove (32) away from the connecting block (34). A micro bolt (5) is threadedly connected to the surface of the drill rod (1).

2. The high efficiency drilling tool for small diameter deep hole according to claim 1, wherein, The drilling mechanism (2) includes a drill bit (21), which is slidably connected to the drill rod (1). A cutting edge (22) is fixedly connected to the surface of the drill bit (21), and a chip removal groove (23) is provided on the surface of the drill bit (21).

3. The high efficiency drilling tool for small diameter deep holes according to claim 2, wherein The drill bit (21) has a double apex design, the cutting edge (22) is helical, and the surface of the chip removal groove (23) is fixedly connected with a nano-coating, which is a diamond coating.

4. The high efficiency drilling tool for small diameter deep holes according to claim 2, wherein The surface of the drill rod (1) is fixedly connected with guide strips (6), and four guide strips (6) are provided, which are distributed in a cross-shaped symmetrical manner on the surface of the drill rod (1).

5. The high efficiency drilling tool for small diameter deep holes according to claim 2, wherein The positioning mechanism (4) includes an insertion block (41), which is fixedly connected to the drill rod (1). A spring (42) is fixedly connected inside the insertion block (41), and a positioning rod (43) is fixedly connected to one side of the spring (42). The positioning rod (43) is slidably connected to the insertion block (41).

6. A high efficiency drilling tool for use in small diameter deep holes according to any one of claims 2 to 5, wherein The surface of the drill bit (21) is provided with a slot, which is adapted to the insertion block (41). The surface of the drill bit (21) is provided with a limiting groove, which is adapted to the positioning rod (43). An O-ring is provided between the drill rod (1) and the drill bit (21).

7. The high efficiency drilling tool for small diameter deep holes according to claim 5, wherein The surface of the insertion block (41) is provided with mounting holes, which are adapted to the micro bolts (5).

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