Inner chip removal deep hole drill for machining multi-hole workpiece

Abstract

The utility model belongs to the technical field of machining tools, particularly relates to an inner chip removal deep hole drill for machining a multi-hole workpiece, and aims to solve the problems that cuttings are extremely easy to accumulate in holes due to large cuttings generated in the machining process of the conventional device, and the problem of unsmooth chip removal is more prominent especially when holes with larger depths are machined. In order to solve the problems that in the prior art, abrasion of a drill bit is aggravated, meanwhile, the drill bit is heated, and machining quality is affected, according to the scheme, the drill bit comprises a drill bit body, and a drill tip is fixed to one end of the drill bit body; the drill bit has the advantages that the chip dividing grooves, the chip guiding grooves and the chip discharging grooves are continuously matched, chips are divided and are helped to flow into the chip discharging channels, the chips are effectively prevented from being accumulated in holes, machining continuity is guaranteed, cooling media reach a cutting area through multiple components, the drill bit is continuously cooled and prevented from being overheated and abraded, the chips can be efficiently scoured through impact force of the drill bit, and the service life of the drill bit is prolonged. And the chip removal efficiency is greatly improved, the risk that the hole wall is scratched by cuttings is reduced, and the machining precision and the surface quality are ensured.

Description

Technical Field

[0001] This utility model relates to a deep hole drill, specifically an internal chip removal deep hole drill for machining multi-hole workpieces, belonging to the field of machining tool technology. Background Technology

[0002] In the field of mechanical manufacturing, deep hole machining of porous workpieces has always been an extremely challenging process. Many industries, such as aerospace, automobile manufacturing, and energy equipment production, have extensive needs for deep hole machining of porous workpieces. Taking the manufacturing of aero engines as an example, many of their internal components, such as turbine disks and combustion chambers, contain a large number of hole systems with varying diameters, considerable depths, and extremely high precision requirements.

[0003] In the prior art, such as the deep hole drill disclosed in announcement number CN221247042U, a chip-breaking groove is provided on the cutting edge of the drill tip. This can change the direction of the chips during the cutting process, making it easier for the chips to be discharged from the chip removal groove. The angle of entry can be adjusted individually for different materials and working conditions, which is an advantage over previous drill bits in terms of adjustable direction and space. However, the above-mentioned prior art has the following shortcomings: When the above-mentioned deep hole drill is used, due to the large amount of chips generated during the machining process, the chips are very easy to accumulate in the hole. This problem of poor chip removal is more prominent, especially when machining holes with large depths. The accumulation of chips in the hole will not only aggravate the wear of the drill bit, but also cause the drill bit to overheat, affecting the machining quality. Utility Model Content

[0004] The purpose of this invention is to solve the problem that the above-mentioned device generates a large amount of chips during the processing, which makes the chips easily accumulate in the hole. This problem is particularly prominent when processing holes with large depths. The accumulation of chips in the hole not only aggravates the wear of the drill bit, but also causes the drill bit to overheat, affecting the processing quality. Therefore, this invention provides an internal chip removal deep hole drill for processing multi-hole workpieces.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: an internal chip removal deep hole drill for machining multi-hole workpieces, comprising a drill bit body;

[0006] A drill tip is fixed at one end of the drill bit body. The drill tip has a double-cone angle structure and a chip removal groove is spirally opened on the surface of the drill tip. A chip removal channel is opened inside the drill bit body. The chip removal channel starts from the tail end of the drill tip and runs through the entire drill bit body. The cross-sectional shape of the chip removal channel is circular. The chip removal groove extends from the end of the drill tip into the chip removal channel.

[0007] As a further embodiment of this utility model: multiple cutting edges are fixed in a ring shape on the outer periphery of the drill bit body near the drill tip, and the cutting edges are distributed in a spiral shape.

[0008] As a further improvement of this utility model, each cutting edge is uniformly provided with chip-breaking grooves.

[0009] As a further improvement of this utility model: a chip guide groove is naturally formed between every two adjacent cutting edges, and the chip separation groove is connected to the chip guide groove.

[0010] As a further embodiment of this utility model: a sealing rotary joint is rotatably connected to the surface of the drill bit body, a cooling channel is provided on the inner wall of the drill bit body, the sealing rotary joint is connected to the cooling channel through a connecting hole on the surface of the drill bit body, and multiple coolant guide holes are provided at one end of the drill bit body near the drill tip, and the same end of the multiple coolant guide holes is connected to the cooling channel.

[0011] As a further improvement of this utility model: the surface of the sealed rotary joint is connected to a cooling medium connecting pipe, which is connected to an external cooling medium source.

[0012] The beneficial effects of this utility model are:

[0013] This invention utilizes a combination of structures including a drill tip, chip removal groove, chip removal channel, cutting edge, chip splitting groove, cooling channel, coolant guide hole, and chip guide groove. The chip splitting groove, evenly spaced on the cutting edge, divides the chips into small segments for easy removal. The chip guide grooves naturally formed between adjacent cutting edges are connected to the chip splitting groove, creating a continuous chip removal channel. Small chips can flow smoothly from the chip splitting groove into the chip guide groove, then into the chip removal groove spirally opened on the drill tip surface, and finally exit the hole through the chip removal channel, effectively preventing chips from accumulating inside the hole and ensuring machining continuity.

[0014] High-pressure cooling medium enters the cooling channel through the cooling medium connecting pipe, the sealed rotary joint, and the connecting hole, and is then sprayed onto the cutting area through the coolant guide hole, providing uninterrupted cooling to the cutting area. This prevents the drill bit from overheating and causing accelerated wear, ensuring the stability of the machining process. At the same time, the powerful impact of the cooling medium can quickly flush the chips generated by the cutting edge to the chip removal channel, greatly improving chip removal efficiency, reducing the risk of chips scratching the hole wall, and ensuring machining accuracy and surface quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 In this utility model Figure 1 A schematic diagram of the bottom structure;

[0017] Figure 3 This is a schematic diagram of the connecting hole and cooling channel in this utility model;

[0018] Figure 4This is a schematic diagram of the coolant guide hole and drill tip in this utility model;

[0019] In the diagram: 1. Drill bit body; 2. Drill tip; 3. Chip removal groove; 4. Chip removal channel; 5. Sealing rotary joint; 6. Cooling medium connection pipe; 7. Cutting edge; 8. Chip separation groove; 9. Connecting hole; 10. Cooling channel; 11. Coolant guide hole; 12. Chip guide groove. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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. Example 1

[0021] like Figures 1 to 4 As shown, an internal chip removal deep hole drill for machining multi-hole workpieces includes a drill bit body 1;

[0022] A drill tip 2 is fixed at one end of the drill bit body 1. The drill tip 2 has a double-cone angle structure and a chip removal groove 3 is spirally opened on the surface of the drill tip 2. A chip removal channel 4 is opened inside the drill bit body 1. The chip removal channel 4 starts from the tail end of the drill tip 2 and runs through the entire drill bit body 1. The cross-sectional shape of the chip removal channel 4 is circular. The chip removal groove 3 extends from the end of the drill tip 2 into the chip removal channel 4.

[0023] In deep hole machining, the double-cone angle structure of drill tip 2 has a smaller front cone angle, which helps to concentrate cutting force and achieve rapid centering when initially drilling into the workpiece, reducing drill bit deviation and vibration, thereby improving the accuracy of the initial drilling stage. The larger rear cone angle helps guide the chips to the chip removal groove 3 during the drilling process, while also enhancing the strength of drill tip 2. The spiral chip removal groove 3 on the surface of drill tip 2 creates a smooth path for chip removal, preventing chips from accumulating near drill tip 2. The spiral chip removal groove 3 can also use the centrifugal force generated by the rotation of the drill bit to assist the chips in moving towards the chip removal channel 4, further improving chip removal efficiency and reducing chip interference with the cutting process, thereby improving machining quality. The circular chip removal channel 4 that runs through the drill bit body 1 from the tail end of drill tip 2 facilitates rapid chip removal. The through-type design ensures that chips can be smoothly discharged from the drill tip 2 to the tail end of the drill bit, without accumulating inside the drill bit, effectively reducing the risk of chip scratching the hole wall and improving the accuracy and surface quality of deep hole machining.

[0024] Furthermore, multiple cutting edges 7 are fixed in a ring around the outer periphery of the drill body 1 near the drill tip 2, and the cutting edges 7 are distributed in a spiral shape.

[0025] Multiple cutting edges 7 are arranged in a ring around the outer periphery of the drill body 1 near the drill tip 2, so that the drill can act on the workpiece material from multiple directions simultaneously when the drill is rotating and cutting. Compared with a single cutting tool, the ring-shaped cutting edges 7 can distribute the cutting force more evenly and avoid excessive local cutting force, thereby ensuring that the hole wall is subjected to uniform force during the drilling process and making the machined hole more accurate. The cutting edges 7 are arranged in a spiral shape. During the cutting process, the chips will be gradually peeled off from the workpiece along the spiral trajectory of the cutting edges 7 and are easier to remove.

[0026] Furthermore, each cutting edge 7 is uniformly provided with chip-breaking grooves 8.

[0027] Chip divider 8 divides the chips into small segments, changing the shape and size of the chips. The originally continuous and large chips are transformed into smaller and more regular fragments under the action of chip divider 8, avoiding the problem of chips being too large to be discharged, reducing the risk of chips clogging chip discharge channel 4, and ensuring the continuity of processing. Example 2

[0028] Improvements based on Example 1:

[0029] Furthermore, a chip guide groove 12 is naturally formed between every two adjacent cutting edges 7, and the chip separation groove 8 is connected to the chip guide groove 12.

[0030] After the chip divider 8 breaks the chips into small segments, these small chips need to be discharged from the hole quickly and smoothly. The chip guide groove 12, as an intermediate channel connecting the chip divider 8 and the chip removal groove 3, constructs an efficient chip removal path. During the machining process, the chips generated by the cutting edge 7 first enter the chip divider 8. Since the chip divider 8 is connected to the chip guide groove 12, the chips can flow naturally into the chip guide groove 12. The shape and position design of the chip guide groove 12 can guide the chips to move smoothly towards the chip removal groove 3 on the surface of the drill tip 2, and finally enter the chip removal channel 4 to be discharged from the hole.

[0031] Furthermore, a sealing rotary joint 5 is rotatably connected to the surface of the drill bit body 1, and a cooling channel 10 is provided on the inner wall of the drill bit body 1. The sealing rotary joint 5 is connected to the cooling channel 10 through a connecting hole 9 on the surface of the drill bit body 1. A plurality of coolant guide holes 11 are provided at one end of the drill bit body 1 near the drill tip 2, and the same end of the plurality of coolant guide holes 11 is connected to the cooling channel 10.

[0032] Multiple coolant guide holes 11 are opened at one end of the drill body 1 near the drill tip 2 and are connected to the cooling channel 10. They can uniformly spray the cooling medium to the cutting area. During the cutting process, the uniformly sprayed cooling medium can cool the drill tip 2, the cutting edge 7 and the workpiece surface in all directions, further improving the cooling effect and reducing machining defects caused by local overheating. On the other hand, the high-pressure cooling medium can also assist in chip removal. The impact force of the cooling medium will flush the chips generated by the cutting edge 7 to the chip removal groove 3 and the chip guide groove 12, and then enter the chip removal channel 4 to be discharged out of the hole, improving chip removal efficiency, reducing the risk of chip accumulation in the hole and ensuring smooth machining.

[0033] Furthermore, the surface of the sealed rotary joint 5 is connected to a cooling medium connecting pipe 6, which is connected to an external cooling medium source.

[0034] The cooling medium connection pipe 6 is connected to an external cooling medium source, providing a continuous and stable supply of cooling medium for deep hole drilling. The external cooling medium source mainly consists of a pressure pump, pipelines, and a cooling medium storage tank.

[0035] Working principle: When in use, the machine tool spindle drives the drill body 1 to rotate at high speed to determine the best cutting speed and feed rate. The drill tip 2 gradually drills into the workpiece. The double cone angle structure of the drill tip 2 enables the drill to quickly center itself during drilling, reducing the fluctuation of cutting force and ensuring the initial accuracy of drilling. During the cutting process, the cutting edge 7 is distributed in a spiral shape, which can continuously and efficiently cut the workpiece material.

[0036] The chips are generated under the action of the cutting edge 7. The chip-breaking grooves 8 evenly opened on the cutting edge 7 divide the chips into small segments. These small chips enter the chip-removing grooves 3 spirally opened on the surface of the drill tip 2 through the chip-guiding grooves 12 naturally formed between adjacent cutting edges 7. At the same time, the high-pressure cooling medium enters the cooling channel 10 from the cooling medium connecting pipe 6, through the sealed rotary joint 5 and the connecting hole 9, and then is sprayed to the cutting area through the coolant guide hole 11. The cooling medium can not only quickly reduce the temperature of the drill bit and the workpiece, but also flush the chips into the chip removal channel 4 and smoothly discharge them out of the hole along the chip removal channel 4, effectively avoiding the interference of chip accumulation in the hole to the machining.

[0037] After machining one hole, the machine tool table moves precisely to the position of the next hole to be machined according to the pre-programmed path, repeating the drilling, chip removal and cooling process until all holes on the multi-hole workpiece are machined.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An internal chip removal deep hole drill for machining multi-hole workpieces, comprising a drill bit body (1); Its features are: One end of the drill bit body (1) is fixed with a drill tip (2). The drill tip (2) is a double cone-shaped structure, and a chip removal groove (3) is spirally opened on the surface of the drill tip (2). A chip removal channel (4) is opened inside the drill bit body (1). The chip removal channel (4) starts from the tail end of the drill tip (2) and runs through the entire drill bit body (1). The cross-sectional shape of the chip removal channel (4) is circular. The chip removal groove (3) extends from the end of the drill tip (2) into the chip removal channel (4).

2. The deep hole drill with internal chip removal for machining multi-hole workpieces according to claim 1, characterized in that: The drill bit body (1) has multiple cutting edges (7) fixed in a ring around one end near the drill tip (2), and the cutting edges (7) are distributed in a spiral shape.

3. The deep hole drill with internal chip removal for machining multi-hole workpieces according to claim 2, characterized in that: Each of the cutting edges (7) is provided with a chip-breaking groove (8).

4. The deep hole drill with internal chip removal for machining multi-hole workpieces according to claim 3, characterized in that: A chip guide groove (12) is naturally formed between every two adjacent cutting edges (7), and the chip separation groove (8) is connected to the chip guide groove (12).

5. The deep hole drill with internal chip removal for machining multi-hole workpieces according to claim 1, characterized in that: The surface of the drill bit body (1) is rotatably connected to a sealing rotary joint (5). A cooling channel (10) is provided on the inner wall of the drill bit body (1). The sealing rotary joint (5) is connected to the cooling channel (10) through a connecting hole (9) on the surface of the drill bit body (1). A plurality of coolant guide holes (11) are provided at one end of the drill bit body (1) near the drill tip (2). The same end of the plurality of coolant guide holes (11) is connected to the cooling channel (10).

6. The deep hole drill with internal chip removal for machining multi-hole workpieces according to claim 5, characterized in that: The surface of the sealing rotary joint (5) is connected to a cooling medium connecting pipe (6), which is connected to an external cooling medium source.

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