Reverse chip removal tool and method

Abstract

The invention provides a reverse chip removal tool and method. The reverse chip removal method comprises the steps that S1, a tool body is driven to rotate, and a blade cuts a workpiece; cuttings are controlled by the chip stopping block to enter a cavity between the chip stopping block and the cutter body, and the chip stopping block isolates communication between the workpiece cavity and the cavity between the chip stopping block and the cutter body; s2, a high-pressure cooling medium is introduced into the main inner cooling channel, after the cooling medium is shunted through the main inner cooling channel, most of the cooling medium enters the totally-closed cavity of the chip stopping block through the reverse inner cooling channel, cuttings in the cavity are driven to be rapidly discharged, and the connecting part of the chip stopping block and the tool body is cooled; and a small part of the cooling medium flows to the blade through the forward inner cooling channel. The reverse chip removal tool has the advantages that cuttings of the reverse chip removal tool can avoid the cavity and can be smoothly discharged from the rear portion of the chip stopping block of the reverse chip removal tool.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of machining, and in particular relates to a reverse chip removal tool and method. BACKGROUND

[0002] Traditional internal diameter boring generally adopts 2 boring tool edges or 1 boring tool edge for machining, and the tool is not designed with cutting fluid internal cooling backflushing and chip blocking block, so that when machining a product with an embedded type waterway or oilway, aluminum chips will enter the embedded type inner hole, the aluminum chips are not easy to clean, the production line output efficiency is low, and the product cleanliness is not easy to guarantee.

[0003] Patent document CN216912137U discloses a reverse chip removal tool with detachable chip blocking blocks, comprising a tool body, a plurality of PCD tool heads and corresponding chip blocking blocks are uniformly arranged on the left end of the tool body in the circumferential direction, the chip blocking blocks are detachably connected above the rake faces of the PCD tool heads, the distance between the chip blocking blocks and the PCD tool heads is set as a chip removal space, and the chip blocking blocks are provided in multiple specifications and sizes to adjust the chip removal space. In this way, the position of the chip blocking block of the existing PCD (polycrystalline diamond) tool is fixed by brazing.

[0004] However, if the patent document CN216912137U is used to machine a workpiece with a cavity, the chips will leak into the cavity of the workpiece, resulting in unqualified cleanliness of the workpiece, and the chips are also easy to be left due to poor chip removal, and even the chip blocking block will fall off, and the chip blocking block will also be quickly worn out, which can only be adjusted again. The tool body does not have a reverse cooling channel to assist in chip removal, and abnormal situations such as chip residue and blockage occur, so the tool cannot be used and only the gap of the chip blocking block can be adjusted.

[0005] In order to make the chips of the reverse chip removal tool avoid the cavity, the chips can be smoothly discharged behind the chip blocking block of the reverse chip removal tool. Therefore, the present application designs a reverse chip removal tool and method to solve the above problems. SUMMARY

[0006] In view of the defects in the prior art, the purpose of the present application is to provide a reverse chip removal tool and method.

[0007] According to the reverse chip removal tool provided by the present application, the steps include: Step S1: driving the tool body to rotate, and the blade cuts the workpiece; the chips are controlled by the chip blocking block to enter the cavity between the chip blocking block and the tool body, and the chip blocking block isolates the communication between the cavity of the workpiece and the cavity between the chip blocking block and the tool body; Step S2: high-pressure cooling medium is introduced into the main inner cooling channel, and after being branched by the main inner cooling channel, most of the cooling medium enters the fully-enclosed cavity of the chip breaker through the reverse inner cooling channel, drives the chips in the cavity to be quickly discharged, and cools the chip breaker and the connecting part of the tool body; a small part of the cooling medium flows to the blade through the forward inner cooling channel.

[0008] According to the present application, a reverse chip removal tool is provided, which adopts a reverse chip removal method and comprises a tool body, a blade, a chip breaker, a main inner cooling channel and a reverse inner cooling channel. One end of the tool body is connected to a machine tool, and the other end is a tool head for fixing the blade; the chip breaker is located on one side of the blade, extends along the tool body and is installed on the tool body; a cavity is formed between the chip breaker and the tool body, and the two ends of the cavity are open and communicate with each other. The main inner cooling channel is arranged inside the tool body; one end of the reverse inner cooling channel is communicated with the main inner cooling channel, and the other end is communicated with the cavity between the chip breaker and the tool body, and the opening of the cavity at one end of the reverse inner cooling channel is arranged to face away from the blade.

[0009] Preferably, one end of the tool body is formed with a connecting end connected to and positioned on the machine tool, and the other end extends in a cylindrical shape and is welded with the blade protruding outward at the end.

[0010] Preferably, the tool body is slotted at the front end side wall in the rotation direction of the blade and accommodates the chip breaker, the chip breaker is fixed on the tool body by screwing, and the outer side wall of the chip breaker and the outer side wall of the tool body form a concentric cylinder.

[0011] Preferably, one end of the chip breaker is flush with the end of the tool body, and the other end extends toward the machine tool, a cavity is formed between the chip breaker and the tool body, a chip discharge inlet is formed at the position close to the blade, and a chip discharge outlet is formed at the end close to the machine tool.

[0012] Preferably, the chip breaker is welded with an inlay close to the chip discharge inlet, and the inlay is lower than the blade.

[0013] Preferably, the main inner cooling channel extends with a forward inner cooling channel at one end close to the tool head end of the tool body, the forward inner cooling channel is communicated with the front end of the tool body, and the diameter of the forward inner cooling channel is smaller than that of the reverse inner cooling channel.

[0014] Preferably, the chip breaker is provided with a step close to the axis of the tool body, and the step extends along the tool body and is arranged through the side wall thereof.

[0015] Preferably, the inlay is made of one of high-speed steel, ceramic, cubic boron carbide or artificial polycrystalline diamond, and has a hardness greater than that of the tool body.

[0016] Preferably, two chip separation grooves are formed in the blade protruding from the end of the tool body.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. By employing a fully enclosed structure of the chip-blocking block, the chips can be completely contained within the tool cavity. The chips will not reach the periphery of the tool body, preventing them from entering the cavity of the machined hole, thus achieving a chip-blocking effect.

[0018] 2. By adopting a reverse internal cooling channel reflux design, this can greatly assist the chips to be discharged quickly from the tool body, avoid accumulation that could cause screws to loosen, chip blocks to fall off, and cool the components connected to the tool body.

[0019] 3. By retaining the forward internal cooling channel with a smaller diameter than the reverse internal cooling channel, sufficient back pressure is provided for the reverse internal cooling channel, while retaining the cooling and lubrication effect of the forward internal cooling channel on the cutting tool.

[0020] 4. By adopting a stepped positioning design between the chip stop block and the tool body, the chip stop block plays a positioning role. Repeated disassembly or replacement of the chip stop block can still ensure the relative position of the chip stop block with respect to the tool body, and also improve the connection strength between the two.

[0021] 5. By adopting a design that welds cemented carbide inserts to the chip baffle, the wear resistance of the chip baffle is improved, thus solving the problem of easy wear of the chip baffle. Attached Figure Description

[0022] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the tool body structure of the present invention.

[0023] Figure 2 yes Figure 1 Sectional view at point AA.

[0024] Figure 3 yes Figure 1 Sectional view at BB.

[0025] Figure 4 This is a schematic diagram of the tool body structure of the present invention.

[0026] Figure 5 This is a schematic diagram of the tool body structure of the present invention.

[0027] Figure 6 This is a schematic diagram of the working state of the present invention.

[0028] The diagram shows: 1. Chip block; 2. Insert; 3. Blade; 4. Main internal cooling channel; 5. Reverse internal cooling channel; 6. Forward internal cooling channel; 7. Screw; 8. Tool body. Detailed Implementation

[0029] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0030] like Figures 1-6 As shown, an anti-chip removal method includes the following steps: Step S1: Drive the tool body 8 to rotate, and the blade 3 cuts the workpiece; the chips are controlled by the chip block 1 to enter the cavity between the chip block 1 and the tool body 8, and the chip block 1 isolates the workpiece cavity from the cavity between the chip block 1 and the tool body 8.

[0031] Step S2: High-pressure cooling medium is introduced into the main internal cooling channel 4. After being diverted by the main internal cooling channel 4, most of the cooling medium enters the fully enclosed cavity of the chip block 1 through the reverse internal cooling channel 5, which drives the chips in the cavity to be discharged quickly. At the same time, it cools the connection between the chip block 1 and the tool body 8. A small amount of cooling medium flows to the cutting tool 3 through the forward internal cooling channel 6 to achieve cooling and lubrication of the cutting edge.

[0032] This embodiment also provides a reverse chip removal tool, which adopts a reverse chip removal method and includes a tool body 8, a cutting blade 3, a chip blocking block 1, a main internal cooling channel 4 and a reverse internal cooling channel 5.

[0033] One end of the tool body 8 is connected to the machine tool, and the other end is where the cutting tool head is fixed to the insert 3. The chip block 1 is located on one side of the insert 3, extends along the tool body 8 and is installed on the tool body 8. A cavity is formed between the chip block 1 and the tool body 8, and the two ends of the cavity are open and interconnected.

[0034] The main internal cooling channel 4 is located inside the tool body 8. One end of the reverse internal cooling channel 5 is connected to the main internal cooling channel 4 and the other end is connected to the cavity between the chip block 1 and the tool body 8. The opening of the reverse internal cooling channel 5 at one end of the cavity is oriented away from the side of the cutting tool 3.

[0035] The working principle of this application is as follows: when the tool body 8 rotates and the insert 3 cuts, the chips are forced into the inner cavity of the chip-stopping block 1 by the limiting action of the chip-stopping block 1, and will not reach the periphery of the chip-stopping block 1, thus achieving the chip-stopping function of the tool. When machining intersecting holes or workpieces with cavities, this completely prevents chips from entering the workpiece. When chips reach the cavity inside the chip-stopping block 1, the centrifugal force of the rotating tool body 8 alone cannot guarantee smooth chip discharge under the cutting action of the tool body 8. Excessive chip buildup can easily lead to structural damage and prevent normal machining. By being rapidly discharged under the influence of the reverse-flowing coolant, the chips do not remain in the inner cavity of the chip-stopping block 1, ensuring excellent chip removal performance. Simultaneously, it removes a large amount of heat from inside the tool, allowing all components to operate normally.

[0036] Specifically, the tool body 8 has a connecting end at one end that connects to and positions itself on the machine tool, and the other end extends in a cylindrical shape with an outwardly protruding insert 3 welded to the end. A slot is cut into the front sidewall of the tool body 8 in the direction of rotation of the insert 3 to accommodate a chip-stopping block 1. The chip-stopping block 1 is screwed to the tool body 8 by screws 7, and the outer sidewall of the chip-stopping block 1 forms a concentric cylinder with the outer sidewall of the tool body 8. The chip-stopping block 1 has a closed structure; one end of the chip-stopping block 1 is flush with the end of the tool body 8, and the other end extends towards the machine tool. A cavity is formed between the chip-stopping block 1 and the tool body 8. A chip inlet is formed near the insert 3 within the cavity, and a chip outlet is formed at the end of the cavity near the machine tool. An insert 2 is welded to the chip-stopping block 1 near the chip inlet, and the insert 2 is slightly lower than the insert 3.

[0037] The main internal cooling channel 4 extends into a forward internal cooling channel 6 near the tool body 8 at the tip end. The forward internal cooling channel 6 connects to the front end of the tool body 8. The diameter of the forward internal cooling channel 6 is significantly smaller than that of the reverse internal cooling channel 5, providing sufficient back pressure to the reverse internal cooling channel 5 and preventing excessive coolant loss through the forward internal cooling channel 6, thus improving the chip removal effect of the reverse internal cooling channel 5. Simultaneously, it removes the heat generated during cutting by the insert 3, also cooling the tool's periphery. Based on numerous publicly available documents and practical experience, the vast majority of the heat generated during cutting is in the chips; therefore, the large diameter and high flow rate of the reverse internal cooling channel 5 provide excellent cooling, while the small diameter and low flow rate of the forward internal cooling channel 6 are sufficient to meet the cooling and lubrication requirements of the tool tip.

[0038] The chip block 1 has a step near the axis of the tool body 8. The step extends along the direction of the tool body 8 and passes through its side wall. The step plays a positioning role. On the one hand, it ensures the interchangeability and universality of the chip block 1, that is, the chip block 1 will be in a fixed relative position with the tool body 8 when it is repeatedly installed. On the other hand, the step positioning method also improves the connection strength between the chip block 1 and the tool body 8 to meet the full enclosure requirement of the chip block 1, so that the chips are firmly wrapped inside the tool.

[0039] Preferably, the insert 2 has a harder hardness than the tool body 8. The insert 2 is made of a wear-resistant material selected from high-speed steel, ceramic, cubic boron carbide, or synthetic polycrystalline diamond. The chip stop block 1 needs to force the chips cut by the blade 3 into the inner cavity of the tool. The chip stop block 1 near the chip inlet will be repeatedly scraped by the chips. Therefore, the insert 2 is welded onto the chip stop block 1. The insert 2 is made of a hard material, making the chip stop block 1 less susceptible to wear from chip scraping. At the same time, the welding design of the insert 2 solves the problem of difficult machining of cemented carbide, significantly reducing the manufacturing cost of the chip stop block 1.

[0040] Preferably, the blade 3 has two chip-separating grooves at the end of the protruding tool body 8 to narrow the chips.

[0041] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 application.

[0042] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A reverse chip removal method, comprising the steps of: Step S1: driving the tool body (8) to rotate, and the blade (3) to cut the workpiece; The chip is controlled by the chip breaker (1) to enter the cavity between the chip breaker (1) and the tool body (8), and the chip breaker (1) isolates the cavity between the chip breaker (1) and the tool body (8) from the workpiece cavity. Step S2: high-pressure cooling medium is introduced into the main internal cooling channel (4), and the cooling medium is divided into two parts after passing through the main internal cooling channel (4), most of which enters the fully enclosed cavity of the chip breaker (1) through the reverse internal cooling channel (5), drives the chip in the cavity to be quickly discharged, and cools the connection part of the chip breaker (1) and the tool body (8); a small part of the cooling medium flows to the blade (3) through the forward internal cooling channel (6).

2. A reverse chipper tool using the reverse chipper method of claim 1, characterized in that, It comprises: The tool body (8), the blade (3), the chip breaker (1), the main internal cooling channel (4) and the reverse internal cooling channel (5); One end of the tool body (8) is connected to the machine tool, and the other end is a tool head fixed blade (3); the chip breaker (1) is located on one side of the blade (3), extends along the tool body (8) and is installed on the tool body (8); a cavity is formed between the chip breaker (1) and the tool body (8), and the two ends of the cavity are open and communicate with each other; The main internal cooling channel (4) is arranged inside the tool body (8); one end of the reverse internal cooling channel (5) is communicated with the main internal cooling channel (4), and the other end is communicated with the cavity between the chip breaker (1) and the tool body (8), and the opening of the cavity at one end of the reverse internal cooling channel (5) is arranged to face away from the side of the blade (3).

3. A reverse chipbreaker according to claim 2, characterized in that One end of the tool body (8) is formed with a connecting end connected to the machine tool, and the other end extends in a cylindrical shape, and a blade (3) protruding outward is welded at the end.

4. A reverse chipbreaker according to claim 3, characterized in that The tool body (8) is slotted at the front end wall in the rotation direction of the blade (3) and accommodates the chip breaker (1), the chip breaker (1) is fixed on the tool body (8) by screwing the screw (7), and the outer wall of the chip breaker (1) and the outer wall of the tool body (8) form a concentric cylinder.

5. A reverse chipbreaker according to claim 4, characterized in that One end of the chip breaker (1) is flush with the end of the tool body (8), and the other end extends towards the machine tool, a cavity is formed between the chip breaker (1) and the tool body (8), a chip discharge inlet is formed near the blade (3) in the cavity, and a chip discharge outlet is formed at the end of the cavity near the machine tool.

6. A reverse chipbreaker according to claim 5, characterized in that The chip breaker (1) is welded with an insert (2) near the chip discharge inlet, and the insert (2) is lower than the blade (3).

7. A reverse chipbreaker according to claim 6, characterized in that One end of the main internal cooling channel (4) near the tool head end of the tool body (8) extends a forward internal cooling channel (6), the forward internal cooling channel (6) is communicated with the front end of the tool body (8), and the diameter of the forward internal cooling channel (6) is smaller than that of the reverse internal cooling channel (5).

8. A reverse chipbreaker according to claim 7, characterized in that The chip breaker (1) is provided with a step near the axis of the tool body (8), the step extends along the tool body (8) and is arranged in the side wall thereof.

9. A reverse chipbreaker according to claim 8, characterized in that The hardness of the insert (2) is greater than that of the tool body (8), and the insert (2) is made of one of high-speed steel, ceramic, cubic boron carbide or artificial polycrystalline diamond.

10. A reverse chipbreaker according to claim 9, characterized in that Two chip division grooves are formed in the blade (3) protruding from the end of the tool body (8).

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