High-precision deep hole drilling tool

Abstract

The utility model relates to deep hole machining technical field discloses a high accuracy deep hole drilling frock, including mounting panel, the mounting panel bottom fixedly connected with upper guide sleeve, the upper guide sleeve bottom fixedly connected with lower guide sleeve, the lower end of upper guide sleeve inner wall is equipped with ring groove, the lower end of upper guide sleeve inner wall is equipped with inclined groove in ring groove, the lower end of inclined groove inclined surface is equipped with circulation groove, the circulation groove side wall all are equipped with a plurality of groups of liquid outlet, the ring groove inside is connected with damping rubber ring, the ring groove inner wall all are installed with a plurality of pressure sensors, the damping rubber ring outer wall is wrapped with the memory alloy ring that connects in the upper guide sleeve inner wall, the upper guide sleeve outer wall is installed with the oil storage ring cylinder, the oil storage ring cylinder bottom fixedly connected with the pump body, the utility model discloses the lubricating oil is transported to circulation groove through the oil guide pipe, and the lubricating oil is evenly sprayed to the drill bit surface through the liquid outlet, realizes the lubrication and cooling of drill bit.

Description

Technical Field

[0001] This utility model relates to the field of deep hole machining technology, specifically a high-precision deep hole drilling tool. Background Technology

[0002] Deep hole drilling fixtures are auxiliary devices specifically designed for deep hole machining. Through precise positioning, stable support, and efficient guidance of the drill bit, they ensure the dimensional accuracy, shape accuracy, and surface quality of the hole during deep hole machining. In the modern machinery manufacturing industry, the demand for deep hole machining is growing, involving many key fields such as aerospace, automotive, and energy.

[0003] Most existing deep hole drilling fixtures only have basic guiding functions, using guide sleeves to mechanically position the drill bit and maintain the straightness of the hole. However, this single-function design reveals significant defects in actual machining: the intense friction between the drill bit and the workpiece during deep hole drilling generates a large amount of cutting heat, which cannot be dissipated in time, thus accelerating drill bit wear and shortening tool life. To address this, we propose a high-precision deep hole drilling fixture. Utility Model Content

[0004] The purpose of this invention is to provide a high-precision deep hole drilling fixture to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-precision deep hole drilling fixture, including a mounting plate, an upper guide sleeve fixedly connected to the bottom end of the mounting plate, and a lower guide sleeve fixedly connected to the bottom end of the upper guide sleeve;

[0006] The lower end of the inner wall of the upper guide sleeve is provided with an annular groove, the lower end of the inner wall of the upper guide sleeve is provided with an inclined groove, the lower end of the inclined surface of the inclined groove is provided with a circulation groove, the side walls of the circulation groove are provided with multiple sets of liquid outlets, a damping rubber ring is snapped into the inside of the annular groove, several pressure sensors are installed on the inner side walls of the annular groove, and the outer wall of the damping rubber ring is wrapped with a shape memory alloy collar connected to the inner wall of the upper guide sleeve;

[0007] An oil storage ring is installed on the outer wall of the upper guide sleeve. A pump body is fixedly connected to the bottom end of the oil storage ring. An oil guide pipe extending through and into the circulation tank is fixedly connected to the output end of the pump body.

[0008] Preferably, the mounting plate wall is threaded with multiple sets of threaded connecting rods.

[0009] Preferably, there is a gap between the inner diameter of the lower guide sleeve and the shape memory alloy collar and the drill bit.

[0010] Preferably, several pressure sensors are electrically connected to the pump body.

[0011] Preferably, an oil inlet pipe is embedded at the top of the oil storage ring cylinder.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: when the drill bit rotates at high speed and generates heat, and the temperature reaches the phase transformation temperature of the memory alloy, the memory alloy collar radially shrinks and squeezes the damping rubber ring. The damping rubber ring changes the pressure sensor, and the pressure sensor transmits the signal to the pump body. The pump body controls the oil guide pipe to deliver lubricating oil to the circulation tank. The lubricating oil is evenly sprayed onto the surface of the drill bit through the outlet, realizing the lubrication and cooling of the drill bit and meeting the processing requirements of high-precision deep hole drilling. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0015] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0016] Figure 4 This is a cross-sectional view of the upper guide sleeve of this utility model.

[0017] In the diagram: 1. Mounting plate; 101. Ring groove; 102. Inclined groove; 103. Circulation groove; 104. Liquid outlet; 11. Threaded connecting rod; 12. Upper guide sleeve; 13. Lower guide sleeve; 14. Damping rubber ring; 15. Pressure sensor; 16. Memory alloy collar; 2. Oil storage ring cylinder; 21. Pump body; 22. Oil guide pipe. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-4 The present invention provides the following technical solution:

[0020] Example 1: A high-precision deep hole drilling fixture includes a mounting plate 1, an upper guide sleeve 12 fixedly connected to the bottom end of the mounting plate 1, a lower guide sleeve 13 fixedly connected to the bottom end of the upper guide sleeve 12, and multiple sets of threaded connecting rods 11 threadedly connected to the wall of the mounting plate 1.

[0021] In use, first fix the mounting plate 1 at the designated position (outer end of the drill bit) on the drilling machine by rotating the threaded connecting rod 11 in the forward direction, and then insert the drill bit into the upper guide sleeve 12 and the lower guide sleeve 13, extending it to the bottom position. During deep hole drilling, the upper guide sleeve 12 and the lower guide sleeve 13 can guide the drill bit. After the deep hole drilling is completed, the tooling can be easily removed from the drilling machine by rotating the threaded connecting rod 11 in the reverse direction.

[0022] Example 2: The technical solution of this example, which differs from that of Example 1, includes: an annular groove 101 is provided at the lower end of the inner wall of the upper guide sleeve 12; an inclined groove 102 is provided at the lower end of the annular groove 101 on the inner wall of the upper guide sleeve 12; a circulation groove 103 is provided at the lower end of the inclined surface of the inclined groove 102; multiple sets of liquid outlets 104 are provided through the side walls of the circulation groove 103; a damping rubber ring 14 is snapped into the annular groove 101; several pressure sensors 15 are installed on the inner side walls of the annular groove 101; a shape memory alloy collar 16 connected to the inner wall of the upper guide sleeve 12 is wrapped around the outer wall of the damping rubber ring 14; the damping rubber ring 14 can also play a shock absorption role; the shape memory alloy collar 16 will expand when the temperature is high.

[0023] An oil storage ring cylinder 2 is installed on the outer wall of the upper guide sleeve 12. A pump body 21 is fixedly connected to the bottom end of the oil storage ring cylinder 2. An oil guide pipe 22 extending through and into the circulation groove 103 is fixedly connected to the output end of the pump body 21. There are gaps between the inner diameter of the lower guide sleeve 13 and the shape memory alloy collar 16 and the drill bit. Several pressure sensors 15 are electrically connected to the pump body 21. An oil inlet pipe is embedded at the top of the oil storage ring cylinder 2. The gaps between the inner diameter of the lower guide sleeve 13 and the shape memory alloy collar 16 and the drill bit can ensure that the drill bit plays a guiding role while rotating. When lubricating oil flows out from the outlet 104, it can flow into the surface of the drill bit. When the pressure sensor 15 is under pressure, it will trigger the pump body 21 to start working. Lubricating oil can be added to the oil storage ring cylinder 2 through the oil inlet pipe.

[0024] During operation, the high-speed rotation of the drill bit generates significant heat due to intense friction between the drill bit and the workpiece. This heat is transferred to the shape memory alloy collar 16. When the temperature reaches the phase transformation temperature of the shape memory alloy, the collar 16 begins to recover its shape, undergoing radial shrinkage deformation, which in turn compresses the damping rubber ring 14. Under compression, the damping rubber ring 14 undergoes elastic deformation, compressing the pressure sensor 15 and converting the pressure signal into an electrical signal, which is then transmitted to the pump body 21. Upon receiving the signal from the pressure sensor 15, the pump body 21 controls the oil guide pipe 22 to deliver lubricating oil into the circulation tank 103. The lubricating oil accumulates in the circulation tank 103 and is evenly sprayed onto the drill bit surface through multiple sets of outlets 104, achieving lubrication and cooling of the drill bit and meeting the processing requirements of high-precision deep hole drilling.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision deep hole drilling fixture, comprising a mounting plate (1), wherein an upper guide sleeve (12) is fixedly connected to the bottom end of the mounting plate (1), and a lower guide sleeve (13) is fixedly connected to the bottom end of the upper guide sleeve (12). Its features are: The lower end of the inner wall of the upper guide sleeve (12) is provided with an annular groove (101), the lower end of the inner wall of the upper guide sleeve (12) is provided with an inclined groove (102), the lower end of the inclined surface of the inclined groove (102) is provided with a circulation groove (103), the side wall of the circulation groove (103) is provided with multiple sets of liquid outlets (104), the annular groove (101) is fitted with a damping rubber ring (14), the inner side wall of the annular groove (101) is provided with several pressure sensors (15), and the outer wall of the damping rubber ring (14) is wrapped with a shape memory alloy collar (16) connected to the inner wall of the upper guide sleeve (12). An oil storage ring cylinder (2) is installed on the outer wall of the upper guide sleeve (12). A pump body (21) is fixedly connected to the bottom end of the oil storage ring cylinder (2). An oil guide pipe (22) is fixedly connected to the output end of the pump body (21) and extends through the circulation tank (103).

2. The high-precision deep hole drilling fixture according to claim 1, characterized in that: The mounting plate (1) has multiple sets of threaded connecting rods (11) threadedly connected to its wall.

3. The high-precision deep hole drilling fixture according to claim 1, characterized in that: There are gaps between the inner diameter of the lower guide sleeve (13) and the shape memory alloy collar (16) and the drill bit.

4. The high-precision deep hole drilling fixture according to claim 1, characterized in that: Several pressure sensors (15) are electrically connected to the pump body (21).

5. The high-precision deep hole drilling fixture according to claim 1, characterized in that: The top of the oil storage ring cylinder (2) is fitted with an oil inlet pipe.

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