A PCD drill reamer with positive and negative chamfering and a guiding structure

Abstract

The present invention relates to the technical field of PCD drill reamer, and specifically to a positive and negative chamfering PCD drill reamer with a guide structure, comprising a shank, a chamfering portion and a drill bit; the chamfering portion is installed at the lower end of the shank, and the drill bit is installed at the lower end of the chamfering portion; the chamfering portion drives a sliding block to slide along the inside of a sliding groove through the extrusion of a workpiece, the sliding sliding block drives an extrusion plate to move horizontally, the horizontally moving extrusion plate drives a telescopic rod to stretch horizontally, and the horizontally stretched telescopic rod covers the opening of the limit groove; the horizontally moving sliding block drives liquid in a connecting pipe to enter the surfaces of parts and workpieces.

Description

Technical Field

[0001] The utility model relates to the technical field of PCD drill reamer, in particular to a positive and negative chamfered PCD drill reamer with a guide structure. Background Art

[0002] PCD drill reamer is a synthetic material with extremely high hardness and wear resistance. Compared with traditional cemented carbide, PCD tools have longer service life and better processing quality when processing high-hardness materials such as non-ferrous metals, composite materials and ceramics; and chamfering refers to the angle processing performed on the edge or hole of the workpiece, the purpose is to remove sharp edges, improve the flatness of the contact surface or facilitate subsequent assembly. Positive and negative chamfering refers to chamfering the upper and lower surfaces of the workpiece respectively.

[0003] Drilling and chamfering are two independent processes. Using different drill bits for drilling and chamfering will cause positioning accuracy problems when re-clamping the workpiece. If the clamping position or fixture is not adjusted properly, the chamfering position will be inaccurate or the chamfer will be asymmetric, which will affect the quality and geometry of the workpiece. Since different types of drill bits usually require different cutting parameters, after switching the drill bit, the operator needs to readjust these parameters to ensure the cutting effect and tool life during the chamfering process. Switching to different types of drill bits requires downtime for tool change and parameter adjustment, which will extend the non-productive time in the process and reduce production efficiency.

[0004] In view of the above situation, in order to overcome the above technical problems, the utility model designs a positive and negative chamfering PCD drill reamer with a guide structure to solve the above technical problems. Utility Model Content

[0005] The technical purpose to be achieved by the utility model is that the utility model integrates chamfering and drilling functions into a drill bit, and can perform chamfering on both sides while drilling a hole, thereby reducing the number of working procedures and clamping times, and improving processing efficiency and consistency.

[0006] In order to achieve the above technical objectives, the utility model provides the following technical solutions:

[0007] The utility model provides a PCD drill reamer with positive and negative chamfers and a guide structure, comprising a shank, a chamfering portion and a drill bit; the chamfering portion is installed at the lower end of the shank, and the drill bit is installed at the lower end of the chamfering portion; the chamfering portion drives a sliding block to slide along the inside of a sliding groove through the extrusion of a workpiece, the sliding sliding block drives an extrusion plate to move horizontally, the horizontally moving extrusion plate drives a telescopic rod to stretch horizontally, and the horizontally stretched telescopic rod covers the opening of the limit groove; the horizontally moving sliding block drives the liquid in the connecting pipe to enter the surface of the part and the workpiece.

[0008] The chamfering part's sliding block and telescopic rod structure realize the coverage of the limit slot opening and the delivery of liquid, making the entire chamfering process more automated, reducing manual intervention, and ensuring that the chamfering part and the drill bit remain stable during the processing, reducing the processing error caused by unstable operation, and improving the processing accuracy. The liquid is introduced into the surface of the parts and workpieces through the connecting pipe, which effectively cools the processing area, reduces the deformation of the workpiece and the tool wear caused by high temperature, and extends the service life of the tool. The tool integrates chamfering and drilling functions, and can perform chamfering on both sides at the same time, reducing the number of processes and clamping times, and improving processing efficiency and consistency. The structural design is simple and reasonable, easy to install and maintain, and can be quickly applied in actual processing, reducing the training time and complexity of operators. The liquid delivery system can effectively take away the heat and chips generated by processing, reduce the surface temperature of the workpiece and the risk of chip splashing, and improve the safety of the operating environment.

[0009] The chamfered part includes a chamfered rod, a storage groove, a water inlet pipe, a connecting pipe, a sliding groove, a sliding block and a limiting groove; the chamfered rod is installed at the lower end of the handle, and a storage groove is opened inside the chamfered rod. The side of the storage groove is connected to the water inlet pipe, the lower end array of the storage groove is connected to the connecting pipe, the other end of the connecting pipe is connected to the sliding groove, and the connecting pipe is located at one end of the outer periphery of the sliding groove, the inner side array of the sliding groove is clamped with a buffer spring, the other end of the buffer spring is clamped with a sliding block, and the lower end surface of the sliding groove is connected to the limiting groove.

[0010] The design of the chamfering rod and the sliding groove ensures stability during the chamfering process, avoids deviation, and improves the processing accuracy. The combination of the storage tank with the water inlet pipe and the connecting pipe enables the liquid to be efficiently transported to the required position, ensuring the cooling and lubrication of the tool and the workpiece during the processing, reducing tool wear and improving the processing quality. The design of the sliding block and the buffer spring enables the chamfering part to be adaptively adjusted according to the shape of the workpiece and the processing requirements, increasing the flexibility and adaptability of the processing. The application of the buffer spring in the sliding groove effectively absorbs the vibration and impact generated during the processing, protects the tool and the workpiece, and prolongs the life of the equipment. The design of the limit groove ensures the stability of the position of the chamfered component during processing, prevents excessive sliding, and ensures safe and accurate processing. The integration of chamfering, drilling and liquid cooling systems in one tool realizes integrated processing, reduces the number of clamping times and process conversion, and improves processing efficiency. The modular design allows each component to be easily disassembled and maintained, reducing downtime and improving production efficiency. Since the tool integrates multiple functions, it reduces the need for multiple equipment, thereby reducing equipment and maintenance costs.

[0011] The cross-sectional shape of the sliding groove is convex, and the cross-sectional shape below the front end of the sliding groove is triangular.

[0012] The cross-sectional shape of the sliding groove is convex, which makes the sliding block more stable during the sliding process, reduces lateral swing, and ensures the accuracy of chamfering and drilling. The triangular cross-sectional design below the front end of the sliding groove helps the sliding block to achieve precise positioning during the processing, prevents the sliding block from offsetting during the processing, and improves the consistency and accuracy of the processing. The combined design of convex and triangular shapes reduces the friction between the sliding block and the sliding groove, making the sliding smoother, reducing wear and extending the service life of the equipment. The convex and triangular cross-sectional design enables the sliding groove and the sliding block to achieve effective sliding in a limited space, saving equipment space and improving the compactness of the overall design. The triangular cross-sectional design facilitates the automatic discharge of chips and other processing residues during the sliding process, keeps the sliding groove clean, and reduces the maintenance frequency. This unique cross-sectional design allows the sliding block to be adaptively adjusted on different workpiece shapes and sizes, increasing the flexibility and adaptability of processing. The convex and triangular structure enhances the anti-seismic performance of the sliding groove, and can still maintain the stable operation of the sliding block under high-frequency vibration conditions, improving the stability and safety of processing.

[0013] The cross-sectional shape of the front end of the sliding block is fan-shaped, the rear end of the sliding block is rectangular, and the sliding block is provided with air outlet holes in an array below one end of the rectangle.

[0014] The fan-shaped design at the front end of the sliding block enhances the guiding effect of the sliding block in the sliding groove, allowing the sliding block to move smoothly along the predetermined trajectory, ensuring the accuracy and stability of the processing process. The fan-shaped front end and rectangular rear end design of the sliding block enable the sliding block to fully utilize the space in the sliding groove, reduce sliding resistance, and improve the smoothness of sliding. The air outlet array design below one end of the rectangle enhances the exhaust effect of the sliding block during processing, helps to reduce the air pressure resistance of the sliding block during movement, makes sliding smoother, and reduces the jamming phenomenon. The rectangular design at the rear end provides sufficient structural support, making the sliding block more stable during processing, reducing deformation and displacement caused by vibration or external force, and improving processing accuracy. The air outlet can not only exhaust, but also be used to transport coolant or lubricant, which helps to reduce temperature and friction during processing and extend the service life of tools and equipment. The cooperation between the fan-shaped front end design and the sliding groove helps to provide a certain buffering effect when the sliding block is impacted or vibrated, reduces damage to the equipment, and improves the stability of the processing process. The air outlet design helps to discharge the chips and debris in the slide groove in time during the processing, keep the slide groove clean, and reduce the frequency of blockage and cleaning maintenance. This design of the slide block can adapt to different processing requirements. By adjusting the position and angle of the slide block, efficient processing of different workpieces can be achieved, improving the versatility and flexibility of the equipment.

[0015] The side walls at both ends of the limiting groove are provided with stepped grooves, a telescopic rod is installed between the stepped grooves, an extrusion plate is installed at the front end of the telescopic rod, the upper end of the extrusion plate is fixedly installed below the sliding block, a cleaning air bag is installed below the telescopic rod, the cleaning air bag is connected to a cleaning tube at one end of the extrusion plate, and the other end of the cleaning tube is connected to the air outlet in the sliding block.

[0016] The stepped groove design on the side walls at both ends of the limit groove ensures the precise positioning of the telescopic rod during horizontal movement, prevents the telescopic rod from sliding out of position, and improves the stability and accuracy of processing. The extrusion plate installed at the front end of the telescopic rod, through the cooperation with the sliding block, effectively covers the opening of the limit groove, ensuring the stability and accuracy of the chamfered part during the working process. The design of the cleaning airbag and the cleaning tube realizes the automatic cleaning function during the processing. The airflow generated by the airbag blows out the chips and processing residues through the air outlet of the cleaning tube and the sliding block, keeps the working area clean, reduces the maintenance workload, and improves the processing efficiency. The cooperation between the telescopic rod and the extrusion plate can be adaptively adjusted according to the different shapes and sizes of the workpiece, which enhances the flexibility and adaptability of the processing equipment. The combined design of the cleaning airbag and the air outlet not only effectively cleans the processing area, but also cools the tool and workpiece through the action of the airflow, reduces the risk of overheating, and improves the tool life and workpiece quality. The overall design is compact and the functional modules are reasonably arranged, which not only saves equipment space, but also simplifies the structure, making the equipment easier to manufacture, install and maintain. The combination of the cleaning system and the limit protection structure effectively reduces the chip splash and vibration generated during the processing, improves the safety of operation and the cleanliness of the environment. Through the application of the cleaning and cooling system, the wear and thermal damage of the tool and equipment during the processing is reduced, and the service life of the equipment is extended. The design of the cleaning pipe connected to the air outlet not only cleans the processing area, but also can perform efficient cooling during the processing, reduce the temperature of the workpiece and tool, and ensure the processing quality.

[0017] The top direction of the telescopic rod is facing the axis of the chamfered rod, and the other end of the telescopic rod is located below the triangle in the sliding groove.

[0018] The design of the top of the telescopic rod facing the axis of the chamfering rod ensures the precise centering of the telescopic rod during the telescopic process, so that the extrusion plate can accurately cover the opening of the limit slot, and improves the processing accuracy of chamfering and drilling. The other end of the telescopic rod is located below the triangle in the sliding groove, so that the telescopic rod can obtain better support during the telescopic process, enhance the stability of the entire sliding mechanism, and reduce vibration and offset during the processing process. This design enables the sliding block to more efficiently transfer force to the telescopic rod and the extrusion plate when sliding, improves the overall force transmission efficiency, and ensures the coordinated action of various parts during the processing. The combination of the triangular structure and the telescopic rod can effectively absorb vibration and impact during the processing process, play a shock-absorbing effect, protect the tool and workpiece, and extend the service life of the equipment. This layout design makes the coordination of various components more compact and reasonable, which not only saves space, but also improves the integration of the equipment and the coordination of functions. Through the design of the telescopic rod and the sliding block, the cleaning airbag and the cleaning tube can effectively clean the processing area, and realize the cooling function through airflow, keep the processing area clean and cool, and improve the processing quality and efficiency.

[0019] The beneficial effects of the utility model are as follows:

[0020] 1. The convex and triangular cross-section design enables the sliding groove and the sliding block to slide effectively in a limited space, saving equipment space and improving the compactness of the overall design. The triangular cross-section design facilitates the automatic discharge of chips and other processing residues during the sliding process, prevents the sliding block from shifting during the processing, improves the consistency and accuracy of the processing, keeps the sliding groove clean, and reduces the maintenance frequency.

[0021] 2. The top of the telescopic rod is designed to be aligned with the axis of the chamfer rod to ensure accurate centering during the telescopic process, so that the extrusion plate can accurately cover the limit slot opening, thereby improving the processing accuracy of chamfering and drilling. This design can also effectively seal the limit slot to prevent debris from entering the airbag and causing damage; the other end of the telescopic rod is located below the triangle in the sliding slot. This design can provide better support for the telescopic rod and reduce vibration and offset during processing during the telescopic process.

[0022] 3. The drill bit integrates chamfering and drilling functions, and can perform chamfering on both sides while drilling, reducing the number of processes and clamping times, and improving processing efficiency and consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] The above and other aspects of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:

[0025] Figure 1 It is an overall schematic diagram of the utility model;

[0026] Figure 2 It is a schematic diagram of the water inlet pipe of the utility model;

[0027] Figure 3 It is an internal cross-sectional view of the chamfered portion of the utility model;

[0028] Figure 4 It is a schematic diagram of the position of the limit groove of the utility model;

[0029] Figure 5 This is a schematic diagram of the interior of the limit slot of the utility model;

[0030] Figure 6 It is a schematic diagram of a sliding block of the utility model.

[0031] In the figure: 1. handle; 2. chamfered part; 21. chamfered rod; 22. storage slot; 23. water inlet pipe; 24. connecting pipe; 25. sliding slot; 26. buffer spring; 27. sliding block; 271. air outlet; 28. limit slot; 281. step slot; 282. telescopic rod; 283. extrusion plate; 284. cleaning air bag; 285. cleaning tube; 3. drill bit. DETAILED DESCRIPTION

[0032] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] like Figure 1 , 2As shown in Figures , 3, 4, 5 and 6, the utility model provides a PCD drill reamer with positive and negative chamfering and a guiding structure, comprising a shank 1, a chamfering portion 2 and a drill bit 3; the chamfering portion 2 is installed at the lower end of the shank 1, and the drill bit 3 is installed at the lower end of the chamfering portion 2, and the chamfering portion 2 drives the sliding block 27 to slide along the inside of the sliding groove 25 through the extrusion of the workpiece, and the sliding sliding block 27 drives the extrusion plate 283 to move horizontally, and the horizontally moving extrusion plate 283 drives the telescopic rod 282 to stretch horizontally, and the horizontally stretched telescopic rod 282 covers the opening of the limit groove 28; the horizontally moving sliding block 27 drives the liquid in the connecting pipe 24 to enter the surface of the parts and the workpiece.

[0034] Through the structure of the sliding block 27 and the telescopic rod 282 of the chamfering part 2, the covering of the opening of the limit groove 28 and the delivery of liquid are realized. This makes the entire chamfering process more automated and reduces manual intervention. At the same time, it can ensure that the chamfering part 2 and the drill bit 3 remain stable during the processing process, reduce the processing error caused by unstable operation, and thus improve the processing accuracy. The liquid is introduced into the surface of the parts and the workpiece through the connecting pipe 24, which effectively cools the processing area, reduces the deformation of the workpiece and the wear of the tool caused by high temperature, and prolongs the service life of the tool. The tool integrates chamfering and drilling functions, can perform chamfering on both sides at the same time, reduces the number of processes and clamping times, and improves processing efficiency and consistency. Its structural design is simple and reasonable, easy to install and maintain, can be quickly applied to actual processing, and reduces the training time and complexity of operators. The liquid delivery system effectively takes away the heat and chips generated by the processing, reduces the surface temperature of the workpiece and the risk of chip splashing, thereby improving the safety of the operating environment.

[0035] like Figure 3 , 4 As shown in and 5, the chamfered portion 2 includes a chamfered rod 21, a storage groove 22, a water inlet pipe 23, a connecting pipe 24, a sliding groove 25, a sliding block 27 and a limiting groove 28; the lower end of the handle 1 is installed with a chamfered rod 21, the interior of the chamfered rod 21 is provided with a storage groove 22, the side of the storage groove 22 is connected to the water inlet pipe 23, the lower end array of the storage groove 22 is connected to the connecting pipe 24, the other end of the connecting pipe 24 is connected to the sliding groove 25, and the connecting pipe 24 is located at one end of the outer periphery of the sliding groove 25, the inner side array of the sliding groove 25 is clamped with a buffer spring 26, the other end of the buffer spring 26 is clamped with a sliding block 27, and the lower end face of the sliding groove 25 is connected to the limiting groove 28.

[0036] The combination of the storage tank 22, the water inlet pipe 23 and the connecting pipe 24 enables the liquid to be efficiently transported to the required position, ensuring the cooling and lubrication of the tool and the workpiece during the processing, reducing tool wear and improving the processing quality. The design of the sliding block 27 and the buffer spring 26 enables the chamfering part 2 to be adaptively adjusted according to the shape of the workpiece and the processing requirements, and increases the adaptability of the chamfer during processing and drilling. The application of the buffer spring 26 in the sliding tank 25 effectively absorbs the vibration and impact generated during the processing, protects the tool and the workpiece, and prolongs the life of the equipment. The chamfering, drilling and liquid cooling systems are integrated into one tool to achieve integrated processing, reduce the number of clamping times and process conversions, and improve processing efficiency.

[0037] like Figure 3 , 4 As shown in Figures 5 and 6, the cross-sectional shape of the sliding groove 25 is convex, and the cross-sectional shape below the front end of the sliding groove 25 is triangular.

[0038] The cross-sectional shape of the sliding groove 25 is convex, which makes the sliding block 27 more stable during the sliding process, reduces lateral swing, and ensures the accuracy of chamfering and drilling. The triangular cross-sectional design below the front end of the sliding groove 25 helps the sliding block 27 to realize the conveying of cuttings during the processing process, avoids the cuttings entering the sliding groove 25 during drilling, thereby affecting the displacement of the sliding block 27 during the processing process, and improves the consistency and accuracy of the processing. The convex shape reduces the friction between the sliding block 27 and the sliding groove 25, making the sliding smoother, reducing wear and extending the service life of the equipment. The convex and triangular cross-sectional design enables the sliding groove 25 and the sliding block 27 to achieve effective sliding in a limited space, saving equipment space and improving the compactness of the overall design. The triangular cross-sectional design facilitates the automatic discharge of chips and other processing residues during the sliding process, keeps the sliding groove 25 clean, and reduces the maintenance frequency.

[0039] like Figure 6 As shown, the cross-sectional shape of the front end of the sliding block 27 is fan-shaped, and the rear end of the sliding block 27 is rectangular. The sliding block 27 is provided with air outlet holes 271 in an array below one end of the rectangle.

[0040] The fan-shaped design at the front end of the sliding block 27 enhances its guiding effect in the sliding groove 25, allowing it to move smoothly along the predetermined trajectory, ensuring the accuracy and stability of the processing process. The design of the fan-shaped front end and the rectangular rear end enables the sliding block 27 to fully utilize the space in the sliding groove 25, reduce sliding resistance, and improve the smoothness of sliding. The array design of the air outlet 271 below one end of the rectangle enhances the exhaust effect of the sliding block 27 during the processing, helps to clean the chips in the sliding groove 25, makes the sliding smoother, and reduces the jamming phenomenon. The rectangular design at the rear end provides sufficient structural support, making the sliding block 27 more stable during the processing, reducing deformation and displacement caused by vibration or external force, thereby improving the processing accuracy. The fan-shaped front end can also effectively grind the workpiece and help form the chamfer of the workpiece drilling position.

[0041] like Figure 4 and 5 As shown, the side walls at both ends of the limit groove 28 are provided with stepped grooves 281, and a telescopic rod 282 is installed between the stepped grooves 281. An extrusion plate 283 is installed at the front end of the telescopic rod 282, and the upper end of the extrusion plate 283 is fixedly installed below the sliding block 27. A cleaning air bag 284 is installed below the telescopic rod 282, and the cleaning air bag 284 is connected to a cleaning tube 285 at one end of the extrusion plate 283, and the other end of the cleaning tube 285 is connected to the air outlet 271 in the sliding block 27.

[0042] The stepped groove 281 design of the side walls at both ends of the limit groove 28 ensures the precise positioning of the telescopic rod 282 during the horizontal movement, prevents the telescopic rod 282 from sliding over, and improves the stability and accuracy of the processing. The extrusion plate 283 installed at the front end of the telescopic rod 282, through the cooperation with the sliding block 27, effectively covers the opening of the limit groove 28, and ensures that the debris of the chamfered part 2 during the working process will not enter the inside of the limit groove 28, thereby affecting the extrusion of the cleaning airbag 284. If there is debris inside, it will cause the airbag to be damaged. The airflow generated by the cleaning airbag 284 blows out the chips and processing residues through the cleaning pipe 285 and the air outlet 271 of the sliding block 27, keeps the working area clean, reduces the maintenance workload, and improves the processing efficiency. The cooperation between the telescopic rod 282 and the extrusion plate 283 can better squeeze the cleaning airbag 284, not only effectively clean the processing area, but also cool the tool and workpiece through the action of the airflow, reducing the risk of overheating, and improving the tool life and workpiece quality.

[0043] like Figure 4 and 5 As shown, the top direction of the telescopic rod 282 is facing the axis of the chamfered rod 21, and the other end of the telescopic rod 282 is located below the triangle in the sliding groove 25.

[0044] The top of the telescopic rod 282 is designed to face the axis of the chamfered rod 21, which ensures the precise alignment of the telescopic rod 282 during the telescopic process, so that the extrusion plate 283 can accurately cover the opening of the limit groove 28, and improve the processing accuracy of chamfering and drilling; and the top of the telescopic rod 282 faces the axis of the chamfered rod 21, which can more effectively seal the limit groove 28, prevent debris from entering the airbag and damaging the airbag, and the other end of the telescopic rod 282 is located below the triangle in the sliding groove 25, so that the telescopic rod 282 obtains better support during the telescopic process, enhances the stability of the entire sliding mechanism, and reduces vibration and offset during the processing. This design enables the sliding block 27 to more efficiently transfer force to the telescopic rod 282 and the extrusion plate 283 when sliding, improves the overall force transmission efficiency, and ensures the coordinated action of each part during the processing. The combination of the triangular structure and the telescopic rod 282 can effectively absorb vibration and impact during the processing, play a shock-absorbing effect, protect the tool and workpiece, and extend the service life of the equipment.

[0045] During the working process of the utility model, when the drill bit 3 drills a hole in a workpiece, the drill bit 3 will drill through the workpiece while drilling continuously. After drilling through the workpiece, the workpiece will squeeze the sliding block 27, so that the squeezed sliding block 27 will chamfer the workpiece. While squeezing the sliding block 27, the sliding block 27 will move into the sliding groove 25. During the movement of the sliding block 27 inward, the sliding block 27 will not seal the connecting pipe 24, so the connecting pipe 24 will flow the liquid in the storage groove 22 to the sliding block 27 to cool the sliding block 27. The outflow of liquid will reduce the spraying of debris. When the sliding block 27 moves backward, it pulls the squeezing plate 283. During the pulling process, the extrusion plate 283 drives the cleaning air bag 284 and the telescopic rod 282 to move. When the sliding block 27 has not come out of the chamfering rod 21, the drill bit 3 will pass through the workpiece. Therefore, when the chamfering rod 21 passes through the workpiece, the sliding block 27 is acted upon by the buffer spring 26, and the sliding block 27 slides around. During the sliding process, the sliding block 27 will squeeze the cleaning air bag 284 through the pressure plate, and the cleaning air bag 284 will allow the internal gas to enter the air outlet 271 through the cleaning tube 285, thereby discharging the debris inside the sliding groove 25. When the sliding block 27 returns to its original position, the sliding block 27 will seal the water inlet pipe 23 to prevent the internal liquid from flowing out.

[0046] The description herein is provided to enable one of ordinary skill in the art to implement or use the present disclosure. Various modifications to the present disclosure will be apparent to one of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Therefore, the present disclosure is not limited to the examples and designs described herein, but should be given the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A PCD drill reamer with positive and negative chamfers and a guide structure, comprising a shank (1), a chamfering portion (2) and a drill bit (3); characterized in that: The lower end of the handle (1) is provided with a chamfering portion (2), and the lower end of the chamfering portion (2) is provided with a drill bit (3). The chamfering portion (2) drives the sliding block (27) to slide along the inside of the sliding groove (25) through the extrusion of the workpiece, and the sliding sliding block (27) drives the extrusion plate (283) to move horizontally. The horizontally moving extrusion plate (283) drives the telescopic rod (282) to stretch horizontally, and the horizontally stretched telescopic rod (282) covers the opening of the limit groove (28); the horizontally moving sliding block (27) drives the liquid in the connecting pipe (24) to enter the surface of the part and the workpiece.

2. A PCD drill reamer with positive and negative chamfering having a guide structure according to claim 1, characterized in that: The chamfered portion (2) comprises a chamfered rod (21), a storage groove (22), a water inlet pipe (23), a connecting pipe (24), a sliding groove (25), a buffer spring (26), a sliding block (27) and a limiting groove (28); the chamfered rod (21) is installed at the lower end of the handle (1); a storage groove (22) is provided inside the chamfered rod (21); a side of the storage groove (22) is connected to the water inlet pipe (23); a connecting pipe (24) is connected in array at the lower end of the storage groove (22); the other end of the connecting pipe (24) is connected to the sliding groove (25); and the connecting pipe (24) is located at one end of the outer periphery of the sliding groove (25); a buffer spring (26) is clamped in array on the inner side of the sliding groove (25); the other end of the buffer spring (26) is clamped to the sliding block (27); and the lower end surface of the sliding groove (25) is connected to the limiting groove (28).

3. A PCD drill reamer with positive and negative chamfers having a guide structure according to claim 2, characterized in that: The cross-sectional shape of the sliding groove (25) is convex, and the cross-sectional shape of the lower portion of the front end of the sliding groove (25) is triangular.

4. A PCD drill reamer with positive and negative chamfering having a guide structure according to claim 3, characterized in that: The cross-sectional shape of the front end of the sliding block (27) is fan-shaped, the rear end of the sliding block (27) is rectangular, and the sliding block (27) is provided with air outlet holes (271) in an array below one end of the rectangle.

5. A PCD drill reamer with positive and negative chamfering having a guide structure according to claim 4, characterized in that: The side walls at both ends of the limiting groove (28) are provided with stepped grooves (281), a telescopic rod (282) is installed between the stepped grooves (281), an extrusion plate (283) is installed at the front end of the telescopic rod (282), the upper end of the extrusion plate (283) is fixedly installed below the sliding block (27), a cleaning air bag (284) is installed below the telescopic rod (282), the cleaning air bag (284) is connected to a cleaning tube (285) at one end of the extrusion plate (283), and the other end of the cleaning tube (285) is connected to the air outlet (271) in the sliding block (27).

6. A PCD drill reamer with positive and negative chamfers having a guide structure according to claim 5, characterized in that: The top direction of the telescopic rod (282) is facing the axis of the chamfered rod (21), and the other end of the telescopic rod (282) is located below the triangle in the sliding groove (25).

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