A core-removable boring tool for machining the inner hole of a metal bar

Abstract

This invention discloses a core-retrieving boring tool for machining the inner hole of metal bars, comprising multiple cutting parts, grinding parts, a guide part, and a connecting part. The grinding parts are hollow cylinders, and the multiple cutting parts are arranged circumferentially on the bottom end face of the grinding parts. Multiple cleaning holes and multiple water-jet cutting holes are evenly distributed on the bottom of the grinding parts. The guide part includes a guide body, helical blades, a cleaning hole connecting structure, and a water-jet cutting hole connecting structure. Continuously rotating and rising helical blades are provided on the outer wall of the guide body. The guide body contains the cleaning hole connecting structure and the water-jet cutting hole connecting structure. The multiple cleaning holes are connected in series through the cleaning hole connecting structure, and the multiple water-jet cutting holes are respectively connected to the water-jet cutting hole connecting structure. This invention allows a section of bar core to be directly formed during the boring process instead of waste chips, which can be reused, saving raw material consumption during machining.

Description

Technical Field

[0001] This invention relates to the field of metal bar internal hole machining technology, and in particular to a core-removable boring tool for machining internal holes in metal bars. Background Technology

[0002] Currently, when machining the inner holes of bars made of materials such as metal and nylon, the method of drilling first and then boring is mostly adopted to obtain the inner hole size required by the design. However, during the drilling and boring process, the drill bit and boring tool directly generate waste chips when cutting the bar, which cannot be directly reused. This is undoubtedly a huge waste of materials, especially for bars with thick walls, particularly metal bars.

[0003] Therefore, there is an urgent need for a core-removable boring tool for machining the inner holes of metal bars. Summary of the Invention

[0004] This invention provides a core-removable boring tool for machining the inner hole of metal bars, which directly forms a bar core with a slightly smaller outer diameter during the boring process instead of waste. The bar can be reused, which can greatly save the consumption of raw materials in the machining process, significantly reduce the cost of raw materials, reduce the generation of waste and the environmental pollution and energy consumption caused by waste melting.

[0005] This invention provides a core-removable boring tool for machining the inner hole of metal bars, comprising multiple cutting parts, grinding parts, a guide part, and a connecting part. The grinding parts are located on the left side of the guide part, and the connecting part is located on the right side of the guide part. The grinding parts and the guide part are hollow cylinders. Multiple cutting parts are arranged circumferentially on the bottom end face of the grinding parts. Multiple cleaning holes and multiple water-jet cutting holes are evenly distributed on the bottom of the grinding parts, with the cleaning holes evenly distributed among the cutting parts. The guide part includes a guide part body, spiral blades, a cleaning hole connecting structure, and a water-jet cutting hole connecting structure. The outer wall of the guide body is provided with continuously rotating and rising spiral blades. During rotation, the spiral blades can carry the powdery iron filings generated at the grinding part to the end of the guide body. The guide body is provided with a cleaning hole connecting structure and a water cutting hole connecting structure. Multiple cleaning holes are connected in series through the cleaning hole connecting structure so that coolant can be injected into the cleaning holes. Multiple water cutting holes are respectively connected to the water cutting hole connecting structure so that cutting fluid can be injected into the water cutting holes.

[0006] The core-retrieving boring tool for machining the inner hole of metal bars, preferably, includes a cleaning hole communication structure comprising multiple cleaning hole channels, an annular groove, and a coolant injection port. One end of each cleaning hole channel is connected to a cleaning hole, and the other end of each cleaning hole channel is connected to the annular groove, thereby achieving series connection of multiple cleaning hole channels. The coolant injection port is provided on the outer wall of the guide body, and the coolant injection port is connected to the annular groove, thereby enabling the injection of coolant into the multiple cleaning holes through the coolant injection port.

[0007] The core-retrieving boring tool for machining the inner hole of metal bars, preferably, includes a hydraulic cutting hole connection structure comprising multiple hydraulic cutting hole channels and multiple cutting fluid injection ports. One end of each hydraulic cutting hole channel is connected to a hydraulic cutting hole, and the other end of each hydraulic cutting hole channel is connected to a cutting fluid injection port. The cutting fluid injection port is located on the outer wall of the guide body to allow cutting fluid to be injected into the hydraulic cutting hole through the cutting fluid injection port.

[0008] The core-removable boring tool for machining the inner hole of a metal bar is preferably provided in such a way that each cutting element includes a first inclined surface, a second inclined surface, a third inclined surface, and multiple cutting edges. The first inclined surface, the second inclined surface, and the third inclined surface are connected. The arc of the first inclined surface is provided on the side close to the inner hole of the grinding element, and the arc is concentric with the grinding element. The first inclined surface is provided with a coating, and multiple cutting edges are provided on the first inclined surface to achieve cutting of the metal bar.

[0009] The core-removable boring tool for machining the inner hole of a metal bar is preferably wherein the minimum circumferential diameter formed by the plurality of cutting parts being evenly distributed around the circumference is less than or equal to the inner diameter of the grinding part, and the maximum circumferential diameter formed by the plurality of cutting parts being evenly distributed around the circumference is equal to the outer diameter of the grinding part.

[0010] The core-removable boring tool for machining the inner hole of metal bars is preferably provided with an axially wavy groove on the outer wall of the grinding part. The edges of the groove are coated to perform secondary shearing and grinding of the continuous iron chips generated by cutting the cutting part at the left end, forming them into powder. During the upward flow of coolant and cutting fluid, the powder is carried upward and simultaneously cleans and cools the outer wall of the grinding part.

[0011] Preferably, the core-removing boring tool for machining the inner hole of a metal bar is further equipped with a cutting nozzle at the hydraulic cutting hole.

[0012] Preferably, in the core-removable boring tool for machining the inner hole of a metal bar, the water-jet cutting hole is smaller than the cleaning hole.

[0013] Preferably, in the core-removable boring tool for machining the inner hole of a metal bar, the axial length of the water-jet cutting channel is less than that of the cleaning channel.

[0014] The beneficial effects are: 1. A water jet cutting hole is provided on the bottom end face of the grinding part. The size of the hole is smaller than that of the cleaning hole. The water jet cutting hole uses cutting fluid to form a high-pressure water jet to assist in cutting iron chips and break the originally formed continuous iron chips in the first stage.

[0015] 2. The outer wall of the grinding part is provided with a wavy groove along the axial direction. The edges of the groove are coated to perform secondary shearing and grinding of the continuous iron chips generated by the cutting of the left end of the workpiece, forming them into powder. During the upward flow of coolant and cutting fluid, the powder is carried upward and cleaned and cooled on the outer wall of the grinding part.

[0016] 3. Cutting nozzles can also be installed at the cutting hole to generate high-pressure water jets, improving tool life and efficiency. This invention enables the direct formation of a small-diameter bar core during the boring process, instead of waste material. This bar core can be reused, which greatly saves on the consumption of raw materials during machining, significantly reduces raw material costs, and reduces the generation of waste material and the environmental pollution and energy consumption caused by waste material smelting. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the flow guide component; Figure 3 This is a schematic diagram of the bottom end face of the grinding part.

[0018] In the picture: 1. Cutting parts; 1-1, First inclined plane; 1-2, Second inclined plane; 1-3, Third inclined plane; 1-4, Cutting edge; 1-5, Coating; 1-6, Arc; 2. Grinded parts; 2-1 Cleaning hole; 2-2 Water jet cutting hole; 2-3 Inner diameter of the workpiece being ground; 2-4 Outer diameter of the workpiece being ground; 2-5, Groove; 3. Airflow guide; 3-1. Guide component body; 3-2. Spiral blade; 3-3. Cleaning hole channel; 3-4. Annular groove; 3-5. Coolant inlet; 3-6. Water jet cutting hole channel; 3-7. Cutting fluid inlet; 4. Connectors. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0020] In the description of this invention, it should be noted that the terms "bottom," "left side," "right side," "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. These terms are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the system or component 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 the invention. Furthermore, the use of terms such as "first," "second," and "third" to define components is merely for the convenience of distinguishing the aforementioned components. Unless otherwise stated, these terms have no special meaning and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] This invention provides a core-retrieving boring tool for machining the inner hole of metal bars, comprising multiple cutting parts, grinding parts, a guide part, and a connecting part. The grinding parts are located on the left side of the guide part, and the connecting part is located on the right side. The grinding parts are hollow cylinders. Multiple cutting parts are arranged circumferentially on the bottom end face of the grinding parts. Multiple cleaning holes and multiple water-jet cutting holes are evenly distributed on the bottom of the grinding parts, with the cleaning holes evenly distributed among the cutting parts. The guide part includes a guide part body, spiral blades, a cleaning hole connecting structure, and a water-jet cutting hole connecting structure. The outer wall of the workpiece body is provided with continuously rotating and rising helical blades. During rotation, these blades carry powdery iron filings generated at the grinding point to the end of the guide body. The guide body contains a cleaning hole connecting structure and a water-jet cutting hole connecting structure. Multiple cleaning holes are connected in series through the cleaning hole connecting structure, allowing coolant to be injected into them. Multiple water-jet cutting holes are connected to the water-jet cutting hole connecting structure, allowing cutting fluid to be injected into them. This invention allows for the direct formation of a slightly smaller diameter bar stock core during boring, instead of waste chips. This bar stock can be reused, significantly reducing raw material consumption during machining, substantially lowering raw material costs, and minimizing waste chip generation and the environmental pollution and energy consumption associated with waste chip smelting.

[0023] The following section uses a core-retrieving boring tool for machining the inner hole of metal bars as an example to illustrate the entire technical process in detail.

[0024] In this embodiment, a core-boring tool for machining the inner hole of a metal bar is an integral hollow tubular metal part. Depending on the length of the bar, the tool can be designed and machined into a single complete part or into multiple parts connected by threads. However, it is necessary to ensure that the tool has a high degree of straightness and a high degree of perpendicularity between the bottom end face and the axis.

[0025] When considering a situation where the tool is short and the bar stock is long, an extension can be connected to the right end of the guide member 3. The left side of the extension is provided with a female thread, and the right side of the extension is provided with a male thread. The extension has a cleaning hole channel and a water cutting hole channel. The channels of the cleaning hole and the water cutting hole can pass through the net wall thickness of the female thread on the left end of the extension. The female thread of the extension is connected to the male thread of the aforementioned connector 4, and the axial length of the cleaning hole 2-1 and the water cutting hole 2-2 of the aforementioned guide member 3 is extended to the rightmost end face of the guide member 3. In this way, it can be ensured that the cleaning hole of the extension is connected to the cleaning hole 2-1 of the aforementioned guide member 3, and that the water cutting hole of the extension is connected to the water cutting hole 2-2. Furthermore, the sealing ring (not shown in the figure) between the cleaning hole 2-1 and the water cutting hole 2-2 can prevent them from interconnecting.

[0026] like Figures 1 to 3 As shown, a core-retrieving boring tool for machining the inner hole of metal bars includes multiple cutting parts 1, grinding parts 2, guide parts 3, and connecting parts 4. The grinding parts 2 are located on the left side of the guide parts 3, and the connecting parts 4 are located on the right side. The grinding parts 2 and the guide parts 3 are hollow cylinders. The grinding parts 2, guide parts 3, and connecting parts 4 can be integrally machined. The inner diameter of the guide parts 3 is the same as the inner diameter of the grinding parts 2, which is smaller than the inner diameter of the grinding parts 2. The outer diameter of the spiral blades 3-2 of the guide parts 3 is smaller than the outer diameter 2-4 of the grinding parts. Multiple cutting parts 1 are arranged circumferentially on the bottom end face of the grinding parts 2. Multiple cleaning holes 2-1 and multiple water-jet cutting holes 2-2 are evenly distributed on the bottom of the grinding parts 2, with the cleaning holes 2-1 evenly distributed among the cutting parts 1.

[0027] Among them, the structure of connector 4 is actually equivalent to a threaded connection end or a welded end that can be processed into a single piece.

[0028] Among them, the cleaning hole 2-1 is used to cool the cutting part 1 and the grinding part 2 through the cleaning hole flow channel 3-3, and at the same time carry the iron chips back. The cleaning hole 2-1 is connected to the cleaning hole flow channel 3-3 so as to achieve the setting of the cleaning hole 2 from the left end face of the grinding part 2 along the axial direction to the left end of the guide 3.

[0029] There are at least two water-jet cutting holes 2-2. The size of the water-jet cutting holes 2-2 is smaller than that of the cleaning holes 2-1. The water-jet cutting holes 2-2 are used to assist in cutting iron chips by forming a high-pressure water jet with the cutting fluid, thus breaking up the originally continuous iron chips. The water-jet cutting holes 2-2 achieve cutting through high-pressure, high-speed water flow; the smaller the hole diameter, the higher the flow velocity.

[0030] In addition, a cutting nozzle is installed at the water cutting hole 2-2 to improve the tool's life and efficiency, thereby generating a high-pressure water jet.

[0031] like Figure 3 As shown, the outer wall of the grinding part 2 is provided with a wavy groove 2-5 along the axial direction. The edges of the groove 2-5 are provided with a coating 1-5, which can perform secondary shearing and grinding on the continuous iron chips generated by the cutting part 1 at the left end and form them into powder. During the upward flow of coolant and cutting fluid, the powder is carried upward and cleaned and cooled on the outer wall of the grinding part 2.

[0032] like Figure 1 and Figure 2 As shown, the guide 3 is a hollow cylinder. The inner diameter of the guide 3 is the same as that of the grinding part 2, and the outer diameter of the guide 3 is mainly smaller than that of the grinding part 2.

[0033] The guide element 3 includes a guide element body 3-1, a spiral blade 3-2, a cleaning hole connecting structure, and a water cutting hole connecting structure. The outer wall of the guide element body 3-1 is provided with a continuously rotating and rising spiral blade 3-2. During the rotation, the spiral blade 3-2 can carry the powdery iron filings generated at the grinding part 2 to the end of the guide element body 3-1. The guide element body 3-1 is provided with a cleaning hole connecting structure and a water cutting hole connecting structure. Multiple cleaning holes 2-1 are connected in series through the cleaning hole connecting structure so that the cleaning hole connecting structure can inject coolant into the cleaning holes 2-1. Multiple water cutting holes 2-2 are respectively connected to the water cutting hole connecting structure so that the water cutting hole connecting structure can inject cutting fluid into the water cutting holes 2-2.

[0034] Among them, the cutting part 1 is made of high-strength material and is machined into a shape similar to a triangular pyramid, or it can be other shapes and structures.

[0035] like Figure 3 As shown, each cutting part 1 includes a first inclined surface 1-1, a second inclined surface 1-2, a third inclined surface 1-3, and multiple cutting edges 1-4. The first inclined surface 1-1, the second inclined surface 1-2, and the third inclined surface 1-3 are connected. The arc 1-6 of the first inclined surface 1-1 is set on the side close to the inner hole of the grinding part 2, and the arc 1-6 is concentric with the grinding part 2. The first inclined surface 1-1 is provided with a coating 1-5, and multiple cutting edges 1-4 are provided on the first inclined surface 1-1 to achieve cutting of the metal bar. The inclined surface has a small inclination angle relative to the central axis surface of the grinding part or is parallel to the central axis surface to effectively reduce the cutting area and generate less iron filings.

[0036] Among them, coatings 1-5 can achieve wear resistance and avoid excessive wear, which would cause the diameter of the iron core formed by cutting to be larger than the inner diameter of the tool, making it impossible to enter the inner hole of the tool.

[0037] The minimum circumferential diameter formed by the multiple cutting parts 1 evenly distributed along the circumference is less than or equal to the inner diameter 2-3 of the grinding part, and the maximum circumferential diameter formed by the multiple cutting parts 1 evenly distributed along the circumference is equal to the outer diameter 2-4 of the grinding part.

[0038] like Figure 2As shown, the cleaning hole connection structure includes multiple cleaning hole channels 3-3, annular grooves 3-4, and coolant inlets 3-5. One end of each cleaning hole channel 3-3 is connected to a cleaning hole 2-1. At the end of the guide member 3, on the left side, i.e., at the end of the cleaning hole channel 3-3, an annular groove 3-4 is provided. However, the annular groove 3-4 does not penetrate the outer wall of the guide member 3. The other ends of the multiple cleaning hole channels 3-3 are all connected to the annular groove 3-4, so that the multiple cleaning holes 2-1 are connected in series through the annular groove 3-4. The outer wall of the guide member body 3-1 is provided with a coolant inlet 3-5, which is connected to the annular groove 3-4, so that coolant can be injected into the multiple cleaning holes 2-1 through the coolant inlet 3-5.

[0039] like Figure 2 As shown, the hydraulic cutting hole connection structure includes multiple hydraulic cutting hole channels 3-6 and multiple cutting fluid injection ports 3-7. One end of the hydraulic cutting hole channel 3-6 is connected to each hydraulic cutting hole 2-2, and the other end of the hydraulic cutting hole channel 3-6 is connected to each cutting fluid injection port 3-7. The cutting fluid injection port 3-7 is located on the outer wall of the guide body 3-1 to enable the injection of cutting fluid into the multiple hydraulic cutting holes 2-2 through the cutting fluid injection port 3-7.

[0040] The length of the water-cutting hole channel 3-6 is less than the length of the cleaning hole channel 3-3, so as to avoid the annular groove 3-4 and prevent liquid mixing.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A core-removable boring tool for machining the inner hole of metal bars, characterized in that, The device includes multiple cutting parts (1), grinding parts (2), flow guides (3), and connecting parts (4). The grinding parts (2) are located on the left side of the flow guide (3), and the connecting parts (4) are located on the right side of the flow guide (3). The grinding parts (2) and the flow guide (3) are hollow cylinders. The multiple cutting parts (1) are arranged in a circumferentially distributed manner on the bottom end face of the grinding parts (2). The bottom of the grinding parts (2) is evenly distributed with multiple cleaning holes (2-1) and multiple water cutting holes (2-2), and the cleaning holes (2-1) are evenly distributed between the cutting parts (1). The flow guide (3) includes a flow guide body (3-1), a spiral blade (3-2), a cleaning hole connecting structure, and a water cutting hole connecting structure. The outer wall of the flow guide body (3-1) is provided with continuously rotating and rising spiral blades (3-2). During the rotation, the spiral blades (3-2) can carry the powdery iron filings generated at the grinding part (2) to the end of the flow guide body (3-1). The flow guide body (3-1) is provided with a cleaning hole connecting structure and a water cutting hole connecting structure. Multiple cleaning holes (2-1) are connected in series through the cleaning hole connecting structure so that the cleaning hole connecting structure can inject coolant into the cleaning hole (2-1). Multiple water cutting holes (2-2) are respectively connected to the water cutting hole connecting structure so that the water cutting hole connecting structure can inject cutting fluid into the water cutting hole (2-2).

2. The core-removable boring tool for machining the inner hole of metal bars according to claim 1, characterized in that, The cleaning hole connection structure includes multiple cleaning hole channels (3-3), an annular groove (3-4), and a coolant inlet (3-5). One end of each cleaning hole channel (3-3) is connected to a cleaning hole (2-1). The annular groove (3-4) is located at the end of the guide member (3). The other ends of the multiple cleaning hole channels (3-3) are connected to the annular groove (3-4) to achieve series connection of the multiple cleaning hole channels (3-3). The coolant inlet (3-5) is provided on the outer wall of the guide member body (3-1). The coolant inlet (3-5) is connected to the annular groove (3-4) to realize the injection of coolant into the multiple cleaning holes (2-1) through the coolant inlet (3-5).

3. The core-removable boring tool for machining the inner hole of a metal bar according to claim 2, characterized in that, The hydraulic cutting hole connection structure includes multiple hydraulic cutting hole channels (3-6) and multiple cutting fluid injection ports (3-7). One end of each hydraulic cutting hole channel (3-6) is connected to a hydraulic cutting hole (2-2), and the other end of each hydraulic cutting hole channel (3-6) is connected to a cutting fluid injection port (3-7). The cutting fluid injection port (3-7) is located on the outer wall of the guide body (3-1) to allow cutting fluid to be injected into the hydraulic cutting hole (2-2) through the cutting fluid injection port (3-7).

4. The core-removable boring tool for machining the inner hole of a metal bar according to claim 3, characterized in that, Each of the cutting parts includes a first inclined surface (1-1), a second inclined surface (1-2), a third inclined surface (1-3), and multiple cutting edges (1-4). The first inclined surface (1-1), the second inclined surface (1-2), and the third inclined surface (1-3) are connected. The arc (1-6) of the first inclined surface (1-1) is provided on the side close to the inner hole of the grinding part (2), and the arc (1-6) is concentric with the grinding part (2). The first inclined surface (1-1) is provided with a coating (1-5), and multiple cutting edges (1-4) are provided on the first inclined surface (1-1) to achieve cutting of metal bars.

5. The core-removable boring tool for machining the inner hole of a metal bar according to claim 4, characterized in that, The minimum circumferential diameter formed by the plurality of cutting parts (1) being evenly distributed along the circumference is less than or equal to the inner diameter (2-3) of the grinding part, and the maximum circumferential diameter formed by the plurality of cutting parts (1) being evenly distributed along the circumference is equal to the outer diameter (2-4) of the grinding part.

6. The core-removable boring tool for machining the inner hole of a metal bar according to any one of claims 1 to 5, characterized in that, The outer wall of the grinding part (2) is provided with a wavy groove (2-5) along the axial direction. The edges of the groove (2-5) are provided with a coating to perform secondary shearing and grinding on the continuous iron chips generated by the cutting part (1) at the left end and form them into powder. During the upward flow of the coolant and cutting fluid, the powder is carried upward and cleaned and cooled on the outer wall of the grinding part (2).

7. The core-removable boring tool for machining the inner hole of a metal bar according to claim 6, characterized in that, A cutting nozzle is also installed at the hydraulic cutting hole (2-2).

8. The core-removable boring tool for machining the inner hole of a metal bar as described in claim 7, characterized in that, The hydraulic cutting hole (2-2) is smaller than the cleaning hole (2-1).

9. The core-removable boring tool for machining the inner hole of a metal bar according to claim 4 or 5, characterized in that, The axial length of the hydraulic cutting hole channel (3-6) is less than that of the cleaning hole channel (3-3).

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