Drill and reamer integrated cutter

Abstract

The utility model discloses a kind of drill and hinge integrated knives, including handle, hinge cutting part and drilling part, the handle, hinge cutting part and drilling part are sequentially arranged from top to bottom, the bottom end of the drilling part is detachably provided with drill bit, the structure of the handle, hinge cutting part and drilling part except drill bit is integrally formed structure, the hinge cutting part is immediately after drilling part, the outer diameter of the bottom of the hinge cutting part is same with the outer diameter of drilling part, the outer diameter of the top of the hinge cutting part is greater than the outer diameter of drilling part. The utility model includes handle, hinge cutting part and drilling part, the structure of the handle, hinge cutting part and drilling part except drill bit is integrally formed structure, guarantee the strength and rigidity of tool whole, reduce error and weak point caused by connecting part. Drill bit is made of titanium alloy, enhance the wear resistance of drill bit, improve the service life of entire tool. Handle is used to connect with the main shaft of machine tool, transmit torque and power. Drilling part is located at the bottom of tool, and it has special blade shape and angle.

Description

Technical Field

[0001] This utility model relates to the field of machining tool technology, specifically a drill-reamer integrated tool. Background Technology

[0002] In the field of machining, hole machining is an extremely common and fundamental operation. Traditional hole machining processes often require first drilling a hole with a drill bit to form an initial hole structure, and then replacing it with a reamer to ream the drilled hole, thereby improving the hole's accuracy and reducing its surface roughness. This conventional machining process has the following drawbacks. First, in terms of processing efficiency, frequent tool changes consume a significant amount of time. Each tool change requires operators to stop the machine to disassemble and install the tool, as well as to re-set and adjust the tool to ensure that the newly installed tool can accurately machine the workpiece. This series of operations significantly extends the processing cycle of a single workpiece, and in large-scale production scenarios, it greatly restricts overall production efficiency. Secondly, from the perspective of machining accuracy, each tool change inevitably introduces positioning errors. Since drills and reamers are two different cutting tools, it's difficult to ensure their axes perfectly coincide when mounted on the machine tool. Furthermore, the machine tool's positioning system may experience slight deviations during tool changes. The accumulation of these errors ultimately leads to the machined holes failing to meet high precision requirements in terms of dimensional accuracy, roundness, and cylindricity. This is especially true for machining components with stringent hole precision requirements, such as blade mounting holes in aero-engines and guide holes in precision molds, where the precision deficiencies of traditional machining processes are even more pronounced.

[0003] Therefore, integrated drill-reamer tools have emerged on the market, enabling multiple operations to be completed in a single tool setting, thus increasing machining speed. However, the connection between the drilling and reaming sections of existing integrated drill-reamer tools is not ideal, leading to sudden changes in cutting force during machining, affecting machining stability and hole quality. Furthermore, some integrated drill-reamer tools have poorly designed chip removal structures, causing chips to accumulate in the chip grooves, hindering smooth chip removal, potentially scratching the machined hole walls, and accelerating tool wear. Therefore, developing a new type of integrated drill-reamer tool that can effectively improve machining efficiency, ensure machining accuracy, optimize chip removal performance, and reduce tool wear is of significant practical importance. Utility Model Content

[0004] The purpose of this utility model is to provide an integrated drill-reamer tool, which aims to improve the problem that the connection between the drilling and reaming parts of the existing integrated drill-reamer tool is not reasonable, resulting in sudden changes in cutting force during the machining process, which affects the stability and quality of the machining.

[0005] This utility model is implemented as follows: A drill-reamer integrated tool includes a shank, a reaming section, and a drilling section, which are arranged sequentially from top to bottom. The top of the shank is provided with a connector. The bottom of the drilling section is provided with a detachable drill bit. Except for the drill bit, the structure of the shank, reaming section, and drilling section is an integrally formed structure. The reaming section is immediately following the drilling section. The outer diameter of the bottom of the reaming section is the same as the outer diameter of the drilling section, and the outer diameter of the top of the reaming section is larger than the outer diameter of the drilling section.

[0006] Preferably, the cutting edge of the drilling part adopts a double helical groove design, with the two helical grooves being equidistant from each other, and the helix angle of the helical grooves being set between 25° and 35°.

[0007] Preferably, the bottom end of the drilling section is provided with a slot, the top of the drill bit is provided with a plug block, the plug block is inserted into the slot, and the drill bit and the bottom of the drilling section are connected by an anti-loosening bolt.

[0008] Preferably, the side of the drilling part is provided with a countersunk hole aligned with the slot, and the plug block is provided with a through hole aligned with the countersunk hole. The anti-loosening bolt passes through the countersunk hole and the through hole to connect the drill bit to the drilling part.

[0009] Preferably, the drill bit is made of titanium alloy, and the side of the drill bit is provided with a groove that communicates with the spiral groove, and the spiral groove and the groove form a continuous spiral groove.

[0010] Preferably, the reaming part has multiple reaming edges on its circumferential surface. The reaming edges are designed with unequal spacing, and the distance difference between adjacent reaming edges is controlled within 0.1-0.3 mm. The cutting edge of the reaming edge is precision ground, and the blunt radius of the cutting edge is within 0.005-0.01 mm.

[0011] Preferably, the rear end of the reaming part is provided with a cylindrical guide section, the outer diameter of which is the same as the outer diameter of the reaming part.

[0012] Preferably, the reaming part has chip removal grooves along the reaming edge on its side, and the bottom end of the chip removal grooves communicates with the spiral groove.

[0013] Preferably, it also includes a flow guide channel, which is disposed inside the tool holder and the inlet of the flow guide channel is disposed at the top of the tool holder. The reaming part and the drilling part are provided with cooling channels, which are connected to the flow guide channel. The drill bit is provided with a flow guide hole, which is aligned with the cooling channel.

[0014] Preferably, the drilling section and the reaming section are provided with a plurality of cooling holes communicating with the cooling channel near the reaming edge, and the outlet direction of the cooling holes is towards the cutting edge.

[0015] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model includes a tool holder, a reaming part, and a drilling part. Except for the drill bit, the structure of the tool holder, reaming part, and drilling part is an integrally formed structure to ensure the overall strength and rigidity of the tool and reduce errors and weak points caused by the connection parts.

[0016] 2. The drill bit of this invention is made of titanium alloy, which enhances its wear resistance and improves the overall service life of the tool. The tool holder is used to connect to the machine tool spindle, transmitting torque and power. The drilling section is located at the bottom of the tool and has a special cutting edge shape and angle. The cutting edge of the drilling section adopts a double helical groove design, with the two helical grooves equidistantly spaced, which can generate a good chip removal effect during drilling, allowing chips to be smoothly discharged along the helical grooves, reducing chip accumulation in the hole and minimizing the impact on drilling quality.

[0017] 3. The reaming part of this utility model has multiple reaming edges evenly distributed on its circumferential surface. The reaming edges adopt an unequal tooth pitch design, and the tooth pitch between adjacent reaming edges varies within a certain range. This design can effectively avoid vibration caused by periodic cutting force during reaming, and improve the stability of reaming and the quality of the machined surface.

[0018] 4. This utility model features a flow channel penetrating the tool holder, while the drilling and reaming sections each have a cooling channel. The flow channel communicates with the cooling channel, and its inlet is located at the top of the tool holder, connected to the machine tool's cooling system. Near the cutting edges of the drilling and reaming sections, multiple cooling holes communicating with the cooling channel are provided, with their outlets facing the cutting edge. This allows the coolant to be directly sprayed onto the cutting area, promptly removing cutting heat, reducing the temperature of the tool and workpiece, minimizing tool wear, and improving machining accuracy and surface quality. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the entire utility model; Figure 2 This is a schematic diagram of the overall structure of this utility model from a frontal view. Figure 3 This is a three-dimensional structural diagram of the entire utility model after the drill bit has been removed; Figure 4 This is a schematic diagram of the structure of the drill bit of this utility model.

[0020] In the diagram: 01, tool holder; 02, reaming section; 03, drilling section; 1, connector; 2, flow channel; 3, chip removal groove; 4, reaming edge; 5, spiral groove; 6, drill bit; 7, anti-loosening bolt; 8, countersunk hole; 9, slot; 10, cooling channel; 11, flow hole; 12, plug block; 13, through hole. Detailed Implementation

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details: Example

[0023] like Figure 1 and Figure 2 As shown, a drilling and reaming integrated tool includes a tool holder 01, a reaming section 02, and a drilling section 03, arranged sequentially from top to bottom. The tool holder 01 has a connector 1 at its top, which facilitates stable connection between the tool holder and the equipment. The bottom of the drilling section 03 has a detachable drill bit 6, which is wear-resistant and improves the overall tool life. Except for the drill bit 6, the tool holder 01, reaming section 02, and drilling section 03 are integrally formed to ensure the overall strength and rigidity of the tool and reduce errors and weak points caused by connection points. The tool holder 01 is used to connect to the machine tool spindle to transmit torque and power. The reaming part 02 is immediately following the drilling part 03. The outer diameter of the bottom of the reaming part 02 is the same as the outer diameter of the drilling part 03, and the outer diameter of the top of the reaming part 02 is larger than the outer diameter of the drilling part 03. This structure facilitates the reasonable connection between the drilling part 03 and the reaming part 02, and avoids positioning errors caused by tool changes.

[0024] like Figure 2 and Figure 3As shown, the cutting edge of the drilling section 03 adopts a double helical groove 5 design, with the two helical grooves 5 equidistantly spaced and the helix angle of the helical grooves 5 set at 25°. This design can generate a good chip removal effect during drilling, allowing the chips to be smoothly discharged along the helical grooves 5, reducing the accumulation of chips in the hole and minimizing the impact on drilling quality. The bottom end of the drilling section 03 is provided with a slot 9, and the top of the drill bit 6 is provided with a connecting block 12. The connecting block 12 is inserted into the slot 9, and the drill bit 6 and the bottom of the drilling section 03 are connected by an anti-loosening bolt 7. This structure facilitates the disassembly and assembly of the drill bit 6 and allows for flexible use of the drill bit 6. The drilling section 03 has a countersunk hole 8 aligned with the slot 9 on its side, and a through hole 13 aligned with the countersunk hole 8 on the insertion block 12. An anti-loosening bolt 7 passes through the countersunk hole 8 and the through hole 13 to connect the drill bit 6 to the drilling section 03. This facilitates a stable connection between the drilling section 03 and the drill bit 6, ensuring stable operation of the drill bit 6. The bottom angle of the drill bit 6 is designed to be, for example, 118°. This angle ensures sufficient cutting force while making it easier to center the drill bit 6, improving drilling positional accuracy. At the end of the drilling section 03, there is a center locating tip. Its function is to quickly and accurately position the drill bit 6 on the workpiece surface at the start of drilling, guiding the drill bit 6 into the workpiece, further improving drilling positional accuracy and reducing drilling deviation. The drill bit 6 is made of titanium alloy, and its side has a groove communicating with the spiral groove 5. The spiral groove 5 and the groove form a continuous spiral groove, which improves the wear resistance of the drill bit 6 and facilitates rapid chip removal.

[0025] like Figure 1 and Figure 2 As shown, the reaming section 02 has multiple reaming edges 4 on its circumferential surface. These edges are designed with unequal spacing, with the distance difference between adjacent edges controlled within 0.1 mm. This design effectively avoids vibrations caused by periodic cutting forces during reaming, improving reaming stability and surface finish. The cutting edges of the reaming edges 4 are precision ground, with a blunt radius of 0.005 mm. This makes the reaming process smoother and more precise, effectively reducing the surface roughness of the hole wall. A cylindrical guide section is located at the rear end of the reaming section 02, with the outer diameter matching that of the reaming section 02. This guide section provides support and guidance during reaming, ensuring straightness and cylindricity, further improving the machining accuracy of the hole. Chip removal grooves 3 are provided along the sides of the reaming section 02 beside the reaming edges 4, with the bottom of the grooves communicating with the spiral grooves 5. This facilitates the smooth discharge of chips generated during cutting. Example

[0026] like Figure 1 and Figure 2As shown, a drilling and reaming integrated tool includes a tool holder 01, a reaming section 02, and a drilling section 03, arranged sequentially from top to bottom. The tool holder 01 has a connector 1 at its top, which facilitates stable connection between the tool holder and the equipment. The bottom of the drilling section 03 has a detachable drill bit 6, which is wear-resistant and improves the overall tool life. Except for the drill bit 6, the tool holder 01, reaming section 02, and drilling section 03 are integrally formed to ensure the overall strength and rigidity of the tool and reduce errors and weak points caused by connection points. The tool holder 01 is used to connect to the machine tool spindle to transmit torque and power. The reaming part 02 is immediately following the drilling part 03. The outer diameter of the bottom of the reaming part 02 is the same as the outer diameter of the drilling part 03, and the outer diameter of the top of the reaming part 02 is larger than the outer diameter of the drilling part 03. This structure facilitates the reasonable connection between the drilling part 03 and the reaming part 02, and avoids positioning errors caused by tool changes.

[0027] like Figure 2 and Figure 3 As shown, the cutting edge of the drilling section 03 adopts a double helical groove 5 design, with the two helical grooves 5 equidistantly spaced and the helix angle of the helical grooves 5 set at 35°. This design can generate a good chip removal effect during drilling, allowing the chips to be smoothly discharged along the helical grooves 5, reducing the accumulation of chips in the hole and minimizing the impact on drilling quality. The bottom end of the drilling section 03 is provided with a slot 9, and the top of the drill bit 6 is provided with a plug block 12. The plug block 12 is inserted into the slot 9, and the drill bit 6 and the bottom of the drilling section 03 are connected by an anti-loosening bolt 7; this structure facilitates the disassembly and assembly of the drill bit 6 and allows for flexible use of the drill bit 6. The drilling section 03 has a countersunk hole 8 aligned with the slot 9 on its side, and a through hole 13 aligned with the countersunk hole 8 on the insertion block 12. An anti-loosening bolt 7 passes through the countersunk hole 8 and the through hole 13 to connect the drill bit 6 to the drilling section 03. This facilitates a stable connection between the drilling section 03 and the drill bit 6, ensuring stable operation of the drill bit 6. The bottom angle of the drill bit 6 is designed to be, for example, 118°. This angle ensures sufficient cutting force while making it easier to center the drill bit 6, improving drilling positional accuracy. At the end of the drilling section 03, there is a center locating tip. Its function is to quickly and accurately position the drill bit 6 on the workpiece surface at the start of drilling, guiding the drill bit 6 into the workpiece, further improving drilling positional accuracy and reducing drilling deviation. The drill bit 6 is made of titanium alloy, and its side has a groove communicating with the spiral groove 5. The spiral groove 5 and the groove form a continuous spiral groove, which improves the wear resistance of the drill bit 6 and facilitates rapid chip removal.

[0028] like Figure 1 and Figure 2As shown, the reaming section 02 has multiple reaming edges 4 on its circumferential surface. These edges are designed with unequal spacing, with the distance difference between adjacent edges controlled within 0.3 mm. This design effectively avoids vibrations caused by periodic cutting forces during reaming, improving reaming stability and surface finish. The cutting edges of the reaming edges 4 are precision ground, with a blunt radius of 0.01 mm. This makes the reaming process smoother and more precise, effectively reducing the surface roughness of the hole wall. A cylindrical guide section is located at the rear end of the reaming section 02, with the outer diameter matching that of the reaming section 02. This guide section provides support and guidance during reaming, ensuring straightness and cylindricity, further improving the machining accuracy of the hole. Chip removal grooves 3 are provided along the sides of the reaming section 02 beside the reaming edges 4, with the bottom of the grooves communicating with the spiral grooves 5. This facilitates the smooth discharge of chips generated during cutting.

[0029] like Figure 1 , Figure 3 and Figure 4 As shown, it also includes a flow guide channel 2, which is located inside the tool holder 01, with its inlet at the top of the tool holder 01. Cooling channels 10 are provided inside the reaming section 02 and the drilling section 03, communicating with the flow guide channel 2. A flow guide hole 11 is provided on the drill bit 6, aligned with the cooling channel 10. This structure facilitates the timely removal of cutting heat by the coolant, reducing the tool temperature and preventing degradation of tool material properties and accelerated wear due to high temperatures. Multiple cooling holes communicating with the cooling channel 10 are provided near the reaming edge 4 of the drilling section 03 and the reaming section 02, with the outlet direction of the cooling holes facing the cutting edge. This structure facilitates the timely removal of cutting heat by the coolant, reducing the tool temperature and preventing degradation of tool material properties and accelerated wear due to high temperatures.

[0030] Working Principle: During use, the tool holder 01 connects to the machine tool spindle, transmitting torque and power to drive the entire tool assembly. First, the drill bit 6 at the bottom of the drilling section 03 contacts the workpiece and, guided by the center positioning tip, quickly and accurately positions itself on the workpiece surface. Then, the drill bit 6 begins drilling. The double helical groove 5 design of the drilling section 03 allows chips to be smoothly discharged along the helical groove 5. Simultaneously, the grooves on the side of the drill bit 6 that communicate with the helical groove 5 form a continuous helical groove, further aiding chip discharge. Furthermore, the bottom angle of the drill bit 6 ensures cutting force while facilitating centering, improving drilling position accuracy.

[0031] After drilling is completed, the reaming section 02, which follows the drilling section 03, performs reaming on the hole. The unequal-pitch reaming edge 4 of the reaming section 02 avoids vibration caused by periodic cutting forces, and the precision-ground cutting edge makes reaming smoother and more accurate, reducing the surface roughness of the hole wall. The cylindrical guide at the rear end of the reaming section 02 provides support and guidance, ensuring the straightness and cylindricity of the reaming. The chip removal groove 3 on the side of the reaming section 02 communicates with the spiral groove 5 of the drilling section 03, allowing the chips generated during reaming to be smoothly discharged.

[0032] Throughout the machining process, coolant is introduced into the guide channel 2 inside the tool holder 01. The coolant passes through the cooling channel 10 inside the reaming part 02 and the drilling part 03. Part of the coolant reaches the cutting area of ​​the drill bit 6 through the guide hole 11 on the drill bit 6, and the other part is sprayed onto the cutting edge through the cooling hole near the cutting edge of the drilling part 03 and the reaming part 02. This removes the cutting heat in time, reduces the tool temperature, and avoids the tool performance degradation and increased wear caused by high temperature.

[0033] When operating this drill-reamer, the operator must first check whether all parts of the tool are properly installed according to the processing requirements, especially whether the connection between the detachable drill bit 6 and the drilling section 03 is secure, and whether the anti-loosening bolts 7 are tightened to ensure the stability of the drill bit 6. Then, accurately install the tool holder 01 on the machine tool spindle and adjust the machine tool parameters. During processing, closely monitor the tool's operation and chip removal effect, and observe whether the coolant supply is smooth to ensure that cutting heat is removed in a timely manner. If any abnormalities are found, such as excessive vibration or poor chip removal, the machine should be stopped immediately for inspection, and operation should only continue after the fault has been rectified. After processing is completed, turn off the machine tool, remove the tool, clean and maintain the tool, and replace any worn drill bits 6 promptly to ensure the accuracy and efficiency of the next processing operation.

[0034] In summary, compared with the prior art, the tool holder 01, reaming section 02, and drilling section 03 of this application, except for the drill bit 6, are integrally formed structures to ensure the overall strength and rigidity of the tool and reduce errors and weak points caused by connection parts. The drill bit 6 is made of titanium alloy, enhancing its wear resistance and improving the overall service life of the tool. The tool holder 01 is used to connect to the machine tool spindle, transmitting torque and power. The drilling section 03 is located at the bottom of the tool and has a special cutting edge shape and angle. The cutting edge of the drilling section 03 adopts a double helical groove 5 design, with the two helical grooves 5 equidistantly spaced. This design can generate a better chip removal effect during drilling, allowing chips to be smoothly discharged along the helical grooves 5, reducing chip accumulation in the hole and minimizing the impact on drilling quality. The reaming section 02 is immediately following the drilling section 03, and its outer diameter is larger than that of the drilling section 03. Multiple reaming edges 4 are evenly distributed on the circumferential surface of the reaming part 02. The reaming edges 4 adopt an unequal tooth pitch design, and the tooth pitch between adjacent reaming edges 4 varies within a certain range. This design can effectively avoid vibration caused by periodic cutting force during reaming, and improve the stability of reaming and the quality of the machined surface.

[0035] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A drill-reamer integrated tool, characterized in that, The tool includes a tool holder (01), a reaming part (02), and a drilling part (03), which are arranged sequentially from top to bottom. The tool holder (01) has a connector (1) at the top. The drilling part (03) has a detachable drill bit (6) at the bottom. Except for the drill bit (6), the tool holder (01), the reaming part (02), and the drilling part (03) are integrally formed. The reaming part (02) is immediately after the drilling part (03). The outer diameter of the bottom of the reaming part (02) is the same as the outer diameter of the drilling part (03), and the outer diameter of the top of the reaming part (02) is larger than the outer diameter of the drilling part (03).

2. The drill-reamer integrated tool according to claim 1, characterized in that, The cutting edge of the drilling part (03) is designed with a double helical groove (5), and the two helical grooves (5) are equidistant from each other. The helical angle of the helical grooves (5) is set between 25° and 35°.

3. The drill-reamer integrated tool according to claim 1, characterized in that, The bottom end of the drilling part (03) is provided with a slot (9), the top of the drill bit (6) is provided with a plug block (12), the plug block (12) is inserted into the slot (9), and the bottom of the drill bit (6) and the drilling part (03) are connected by an anti-loosening bolt (7).

4. A drill-reamer integrated tool according to claim 3, characterized in that, The side of the drilling part (03) is provided with a countersunk hole (8) aligned with the slot (9), and the plug block (12) is provided with a through hole (13) aligned with the countersunk hole (8). The anti-loosening bolt (7) passes through the countersunk hole (8) and the through hole (13) to connect the drill bit (6) to the drilling part (03).

5. A drill-reamer integrated tool according to claim 3, characterized in that, The drill bit (6) is made of titanium alloy, and the side of the drill bit (6) is provided with a groove that communicates with the spiral groove (5). The spiral groove (5) and the groove form a continuous spiral groove.

6. A drill-reamer integrated tool according to claim 1, characterized in that, The reaming part (02) has multiple reaming blades (4) on its circumferential surface. The reaming blades (4) are designed with unequal spacing, and the distance difference between adjacent reaming blades (4) is controlled at 0.1-0.3mm. The cutting edge of the reaming blade (4) is precision ground, and the blunt radius of the cutting edge is 0.005-0.01mm.

7. A drill-reamer integrated tool according to claim 6, characterized in that, The rear end of the reaming part (02) is provided with a cylindrical guide part, the outer diameter of which is the same as the outer diameter of the reaming part (02).

8. A drill-reamer integrated tool according to claim 6, characterized in that, The reaming part (02) has chip removal grooves (3) on its side along the reaming edge (4), and the bottom end of the chip removal grooves (3) is connected to the spiral groove (5).

9. A drill-reamer integrated tool according to any one of claims 1-8, characterized in that, It also includes a flow channel (2), which is located inside the tool holder (01) and the inlet of the flow channel (2) is located at the top of the tool holder (01). The reaming part (02) and the drilling part (03) are provided with a cooling channel (10), which is connected to the flow channel (2). The drill bit (6) is provided with a flow hole (11), which is aligned with the cooling channel (10).

10. A drill-reamer integrated tool according to claim 9, characterized in that, The drilling section (03) and the reaming section (02) are provided with a plurality of cooling holes near the reaming edge (4) respectively, which are connected to the cooling channel (10), and the outlet direction of the cooling holes is towards the cutting edge.

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