Boring cutter of back-flushing chip removal cutter

Abstract

The utility model relates to the technical field of machine tool processing, and discloses a boring cutter of a backflushing chip removal cutter, which comprises a cutter body, a blade, a chip removal groove and a chip stopping block, the chip stopping block is positioned at the front end of the chip removal groove, and a cooling water channel is arranged on the axis of the cutter body. The end, close to the chip removal groove, of the cooling water channel is sealed, the cooling water channel is communicated with the back flushing hole, aluminum chips are prevented from falling into a product runner for the second time, the chip removal mode is achieved after back flushing, the product cleanliness is improved, the machining cost is reduced, and the output efficiency of a production line is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tool processing, in particular to a boring tool for a backflushing and post-chip removal tool. Background Art

[0002] Conventional internal diameter boring generally uses 2 boring blades or 1 boring blade for processing. The tool is not designed with internal coolant backflushing and chip blockers, resulting in products with embedded waterways or oilways during processing. Aluminum chips will enter the embedded inner holes, making it difficult to clean the aluminum chips, reducing the production line output efficiency, and it is not easy to ensure the product cleanliness.

[0003] Chinese patent document CN112222532A discloses a backflushing chip removal internal coolant reamer, which includes a working part and a backflushing part. The working part has a number of non-connecting chip removal grooves extending from the end to the inside. The end area of each chip removal groove is fixedly connected with a blade for cutting processing. The internal coolant hole with a closed front end extends from the working part to the backflushing part. The backflushing part has a backflushing hole inclined backward and pointing to the cutting edge of the blade, so that a coolant flow channel is formed through the connection of the internal coolant hole, the backflushing hole and the chip removal groove, and the coolant flows through the cutting edge of the blade through the coolant flow channel to flush out the chips at the processing position.

[0004] Chinese patent document CN117484185A discloses a reverse chip removal tool for machining a bowl-shaped plug hole of a motor housing, which includes an internal coolant hole, an expansion and reaming PCD blade, a chamfering PCD blade, and a stepped chip blocker; the internal coolant hole runs through the central axis of the tool; the expansion and reaming PCD blade is located at the top of the tool and includes an expansion cutting edge and a reaming cutting edge. There is an inclined surface 9 between the expansion and reaming cutting edges for hole expansion and reaming.

[0005] The existing technology has the following deficiencies: The hole expansion of the reverse chip removal tool can only reverse the chip removal of most of the generated aluminum chips through the action of the stepped chip blocker, and there is a risk that a small part of the aluminum chips will enter the waterway or oilway of the product again along the gap between the tool and the product. Summary of the Utility Model

[0006] In order to solve the technical problem of avoiding the secondary entry of aluminum chips into the product flow channel during the processing, the utility model provides a boring tool for a backflushing and post-chip removal tool, which includes a tool body, a blade, a chip removal groove and a chip blocker. The chip blocker is located at the front end of the chip removal groove. A cooling water channel is provided on the axis of the tool body. It is characterized in that a backflushing hole is provided in the chip removal groove, one end of the cooling water channel close to the chip removal groove is sealed, and the cooling water channel communicates with the backflushing hole.

[0007] In order to improve the backflushing effect, the backflushing hole forms an acute angle with the axis of the tool body, and the water outlet of the backflushing hole faces the rear end of the chip removal groove.

[0008] Furthermore, the water outlet of the counter-punching hole is aligned with the cutting edge of the blade.

[0009] Preferably, the counter-punching hole is arranged close to the chip guard block. The closer the counter-punching hole is to the chip guard block, the smaller the counter-punching blind area at the front end of the tool body, and the better the effect of counter-punching aluminum chips.

[0010] In order to prevent metal chips from entering the product flow channel and facilitate chip removal, the rotating diameter of the blade is greater than that of the chip guard block, the rotating diameter of the chip guard block is greater than that of the tool body, and an open space between the rear end of the chip removal groove and the product forms a chip removal port.

[0011] In order to facilitate guiding metal chips, the outer wall of the chip guard block is arc-shaped, and the chip guard block is provided with an inclined guiding surface, and the included angle between the inclined guiding surface and the blade is an acute angle.

[0012] In order to facilitate fine adjustment of the installation angle of the chip guard block and the chip removal port spacing, the chip removal groove is provided with a plurality of through installation holes, the chip guard block is provided with a plurality of through threaded holes, the locking screw is installed on the tool body and passes through the installation hole and is threadedly connected with the threaded hole, and the installation hole and the threaded hole are sealed with sealant.

[0013] Preferably, the tool body is divided into a front-end cylinder and a rear-end cylinder. There is a step at the connection between the front-end cylinder and the rear-end cylinder. The front-end cylinder is larger than the rear-end cylinder, and an open space between the rear-end cylinder, the rear end of the chip removal groove and the product forms a chip removal port.

[0014] Preferably, the tool body is provided with a plurality of blades, a plurality of chip removal grooves, a plurality of chip guard blocks and a plurality of counter-punching holes. The number of the blades, chip removal grooves, chip guard blocks and counter-punching holes is the same and they are rotationally symmetric along the axis of the tool body.

[0015] The utility model has the following beneficial effects:

[0016] During the processing of the utility model, the water pressure of the internal cooling center in the processing machine tool is used to counter-punch metal chips and conduct chip removal at the same time. The counter-punching hole cooperates with the chip guard block to prevent aluminum chips from falling into the product flow channel again, and realizes the chip removal method after counter-punching. The structure is simple, the use is reliable, and the cost is low. By adopting this processing method, the product cleanliness is improved, the processing cost is reduced, and the production line output efficiency is improved. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of Embodiment 1 of the boring tool of the chip removal tool with counter-punching and chip removal of the utility model;

[0018] Figure 2 It is Figure 1 the cross-sectional view of;

[0019] Figure 3 This is a schematic diagram of the boring tool of the chip removal tool with backflush for the present utility model, which is Embodiment 2. Detailed implementation manners

[0020] The following is a further detailed description through specific implementation manners:

[0021] 1. The reference numerals in the attached drawings of the specification include: tool body 1, blade 2, chip removal groove 3, chip baffle 4, cooling water channel 5, backflush hole 6, water outlet 601, chip discharge port 7, inclined guiding surface 8, mounting hole 9, threaded hole 10, sealant 11, front-end cylinder 12, rear-end cylinder 13, step 14, locking screw 15.

[0022] Embodiment 1

[0023] As Figure 1-2 shown, a boring tool of a chip removal tool with backflush includes a tool body 1, two blades 2, two chip removal grooves 3 and two chip baffles 4. The chip baffle 4 is located at the front end of the chip removal groove 3. A cooling water channel 5 is provided on the central axis of the tool body 1. A backflush hole 6 is provided in the chip removal groove 3. One end of the cooling water channel 5 close to the chip removal groove 3 is sealed, and the cooling water channel 5 communicates with the backflush hole 6.

[0024] The included angle α between the backflush hole 6 and the central axis of the tool body 1 is an acute angle, and the water outlet 601 of the backflush hole 6 faces the rear end of the chip removal groove 3.

[0025] The water outlet 601 of the backflush hole 6 is aligned with the cutting edge of the blade 2.

[0026] The backflush hole 6 is arranged close to the chip baffle 4. The closer the backflush hole 6 is to the chip baffle 4, the smaller the backflush blind area at the front end of the tool body 1, and the better the effect of backflushing aluminum chips.

[0027] The tool body 1 rotates around the central axis. The rotation diameter of the blade 2 is larger than the rotation diameter of the chip baffle 4, and the rotation diameter of the chip baffle 4 is larger than the rotation diameter of the tool body 1. An open space between the rear end of the chip removal groove 1 and the product forms a chip discharge port 7. The chip baffle 4 blocks metal chips from entering the flow channel of the product from the front end of the tool body 1. When the boring depth exceeds the chip discharge port 7, due to the gap between the tool body 1 and the product processing hole, the metal chips generated after the blade 2 processes are discharged through the gap between the rear end of the tool body 1 and the product under the guidance of the cooling water flowing out of the backflush hole 6.

[0028] The outer wall of the chip baffle 4 is arc-shaped, and an inclined guiding surface 8 is provided on the chip baffle 4. The included angle between the inclined guiding surface 8 and the blade 2 is an acute angle.

[0029] The chip removal groove 3 is provided with a plurality of through mounting holes 9, and the chip blocking block 4 is provided with a plurality of through threaded holes 10. The locking screw is mounted on the tool body 1 and passes through the mounting hole 9 and is threadedly connected to the threaded hole 10.

[0030] The mounting hole 9 and the threaded hole 10 are sealed by a sealant 11.

[0031] The tool body 1 is provided with 2 blades 2, 2 chip removal grooves 3, 2 chip blocking blocks 4 and 2 counterboring holes 6. The blades 2, chip removal grooves 3, chip blocking blocks 4 and counterboring holes 6 are rotationally symmetric along the axis of the tool body 1, and each blade 2, chip removal groove 3, chip blocking block 4 and counterboring hole 6 is a group.

[0032] When machining a boring hole, the aluminum chips produced are discharged into the area of the chip removal groove 3 through the gap between the blade 2 and the chip blocking block 4. Then, the water pressure of the internal coolant center of the tool is used to flush the aluminum chips produced during machining out of the product machining hole. The chip blocking block 4 mounted on the tool bar has a certain angle with the cutting edge. When the spindle rotates, the centrifugal force discharges the chips out of the hole, and effectively prevents the aluminum chips from falling back into the machining hole again until the machining of the hole is completed.

[0033] Embodiment 2

[0034] As Figure 3 shown, the difference between this embodiment and Embodiment 1 is that the tool body 1 is divided into a front-end cylinder 12 and a rear-end cylinder 13. A step 14 is provided at the connection between the front-end cylinder 12 and the rear-end cylinder 13. The front-end cylinder 12 is larger than the rear-end cylinder 13. An open space between the rear-end cylinder 13, the rear end of the chip removal groove 3 and the product forms a chip discharge port 7. The outer wall of the chip blocking block 4 is arc-shaped and fits with the front-end cylinder 12. The rotation diameter of the chip blocking block 4 is the same as that of the front-end cylinder 12. The rotation diameter of the blade 2 is larger than the rotation diameter of the chip blocking block 4.

[0035] The above are only the embodiments of the present utility model. Specific structures and common knowledge such as characteristics that are well-known in the art are not described in detail herein. Those of ordinary skill in the art know all the common technical knowledge in the technical field to which the utility model belongs before the filing date or the priority date, can learn all the existing technologies in this field, and have the ability to apply conventional experimental means before this date. Those of ordinary skill in the art can, under the inspiration given by this application, combine their own abilities to complete and implement this solution. Some typical well-known structures or well-known methods should not become an obstacle for those of ordinary skill in the art to implement this application. It should be noted that for those skilled in the art, without departing from the structure of the present utility model, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicability of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. A boring tool for a recoiling and chip-discharging tool, comprising a tool body, a cutting blade, a chip-discharging groove and a chip-blocking block, the chip-blocking block being located at the front end of the chip-discharging groove, and a cooling water channel being arranged on the axis of the tool body, characterized in that, The chip removal groove is provided with a counter-punched hole. One end of the cooling water channel close to the chip removal groove is sealed, and the cooling water channel communicates with the counter-punched hole.

2. The boring tool of the recoil rear chip removal tool according to claim 1, characterized in that: The counter-punched hole forms an acute angle with the axis of the tool body, and the water outlet of the counter-punched hole faces the rear end of the chip removal groove.

3. The boring tool of the recoil rear chip removal tool according to claim 2, characterized in that: The water outlet of the counter-punched hole is aligned with the cutting edge of the blade.

4. The boring tool of the recoil rear chip removal tool according to any one of claims 1-3, characterized in that: The counter-punched hole is arranged close to the chip baffle.

5. The boring tool of the recoil rear chip removal tool according to claim 4, characterized in that: The rotation diameter of the blade is larger than that of the chip baffle, and the rotation diameter of the chip baffle is larger than that of the tool body. The open space between the rear end of the chip removal groove and the product forms a chip discharge port.

6. The boring tool of the recoil rear chip removal tool according to claim 5, characterized in that: The outer wall of the chip baffle is arc-shaped, and the chip baffle is provided with an inclined guiding surface, and the angle between the inclined guiding surface and the blade is an acute angle.

7. The boring tool of the recoil rear chip removal tool according to claim 5 or 6, characterized in that: The chip removal groove is provided with a plurality of through mounting holes, and the chip baffle is provided with a plurality of through threaded holes. The locking screw is installed on the tool body and passes through the mounting hole to be threadedly connected with the threaded hole, and the mounting hole and the threaded hole are sealed with sealant.

8. The boring tool of the recoil rear chip removal tool according to claim 7, characterized in that: The tool body is divided into a front-end cylinder and a rear-end cylinder. There is a step at the connection between the front-end cylinder and the rear-end cylinder. The front-end cylinder is larger than the rear-end cylinder. The open space between the rear-end cylinder, the chip removal groove and the product forms a chip discharge port.

9. The boring tool of the recoil rear chip removal tool according to claim 8, characterized in that: The tool body is provided with a plurality of blades, a plurality of chip removal grooves, a plurality of chip baffles and a plurality of counter-punched holes. The number of the blades, the chip removal grooves, the chip baffles and the counter-punched holes is the same and they are rotationally symmetric along the axis of the tool body.

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