Adjustable double-sided chamfering cutter

Abstract

The utility model discloses an adjustable double-sided chamfering cutter which comprises a cutter handle and at least one front chamfering module arranged at the front end of the cutter handle, and further comprises at least one rear chamfering module arranged at the middle rear end of the cutter handle. A mounting groove for mounting the rear chamfering module is formed in the cutter handle, and a plurality of pairs of mounting holes capable of fixing the rear chamfering module are formed in the mounting groove in the extending direction of the cutter handle. According to the adjustable double-sided chamfering cutter, the front chamfering module and the rear chamfering module are arranged to conduct one-time chamfering treatment on the bottom face and the upper surface of a through hole of a workpiece, the workpiece does not need to be turned over, and the machining labor intensity is greatly relieved; the chamfering sizes of the bottom surface and the upper surface can be respectively controlled, so that the chamfering precision is higher; the mounting position of the rear chamfering module at the rear end of the cutter handle can be adjusted according to the thickness of a workpiece to adapt to different workpieces, and the application range is wider.

Description

Technical Field

[0001] This utility model relates to the field of machining cutting tools. More specifically, this utility model relates to an adjustable double-sided chamfering tool. Background Technology

[0002] In current mechanical parts, parts with holes generally account for 50% to 80% of the total number of parts. After machining the through holes, it is necessary to chamfer and deburr both sides of the through holes. However, workpieces have different thicknesses, resulting in through hole depths of varying depths. Additionally, the hole opening has two sides; chamfering the reverse opening generally requires flipping the workpiece. In this case, the machining process for chamfering through holes of different depths in both forward and reverse directions requires multiple procedures such as moving, flipping, positioning, and tool changing, which prolongs machining time and reduces machining efficiency. Some combination tools can perform both forward and reverse chamfering simultaneously, but the machining depth is fixed. For chamfering different depths in both directions, custom-made tools capable of machining holes of different depths are required, necessitating tool changes and increasing tooling costs and process time.

[0003] The utility model patent with announcement number CN205324810U discloses a double-sided chamfering composite tool for drilling, including a tool holder, a chamfering blade and a drilling blade. The tool holder has a hollow structure and a cutting end has a cutting port at the lower end. The chamfering blade is installed inside the tool holder. The top end of the tool bar is movably fixed to the upper end of the tool holder by an adjusting bolt. It can chamfer the upper surface of the material after drilling.

[0004] However, this device is only suitable for chamfering the upper surface of the through hole of the workpiece. For chamfering the lower surface of the workpiece, it is still necessary to flip the workpiece. The main high-intensity work of chamfering the lower surface of the through hole is flipping the workpiece, which is particularly difficult for large and heavy workpieces. Simplifying the chamfering process of the upper surface does not significantly reduce the labor intensity of processing. Utility Model Content

[0005] One object of this invention is to solve the above-mentioned problems and / or defects, and to provide the advantages that will be described later.

[0006] To achieve these objectives and other advantages of this utility model, an adjustable double-sided chamfering tool is provided, comprising: a tool holder, at least one front chamfering module disposed at the front end of the tool holder, and at least one rear chamfering module disposed at the middle and rear end of the tool holder.

[0007] The tool holder is provided with a mounting groove for installing a rear chamfering module, and the mounting groove is provided with multiple pairs of mounting holes for fixing the rear chamfering module along the extension direction of the tool holder.

[0008] Preferably, the free end of the tool holder is provided with a support module that is detachably connected to it;

[0009] The support module includes: a module body that is detachably connected to the tool holder;

[0010] The front copper sleeve fitted onto the front end of the module body;

[0011] The rear copper sleeve is fitted onto the rear end of the module body;

[0012] A baffle is installed at the free end of the detachable module to block the front copper sleeve;

[0013] The support module has a mounting groove on its surface for placing the front chamfer module;

[0014] The diameters of the front and rear copper sleeves are adapted to the diameter of the through hole in the workpiece, and the front and rear copper sleeves are respectively set on the front and rear sides of the front chamfering module.

[0015] Preferably, the positioning platform on the main body surface of the module is used to position the front and rear copper sleeves;

[0016] The positioning platform is adapted to the position of the front chamfering module, and a chip removal groove is provided in the middle of the positioning platform;

[0017] Both the tool holder and the module body are provided with interconnected coolant delivery channels, and the positioning platform is provided with a water outlet on the side opposite to the front chamfering module that is connected to the coolant delivery channels.

[0018] Preferably, the front chamfering module includes: a front chamfering tool holder with a square hole;

[0019] A front chamfering insert set inside a square hole;

[0020] It is set in the front chamfering tool holder to hold the front end of the front chamfering tool in the square hole of the tool pin;

[0021] An elastic element is located at the rear end of the blade top pin and provides the blade top pin with the push force of the chamfering tool holder before ejection.

[0022] The front chamfering blade has a groove in the middle for the front end of the blade top pin to slide therein;

[0023] The groove is configured as an inclined sliding ramp for the top pin on the side near the cutting edge, and as a locking surface for the top pin that prevents the blade top pin from moving forward on the side away from the cutting edge.

[0024] Preferably, the front chamfering blade is configured as a single-sided chamfering blade;

[0025] The single-sided chamfering insert is provided with a cutting edge I for chamfering the bottom of the workpiece hole.

[0026] Preferably, the front chamfering blade is configured as a bidirectional chamfering blade;

[0027] The bidirectional chamfering insert is provided with two cutting edges II, one for chamfering the bottom of the workpiece hole and the other for chamfering the top of the workpiece hole.

[0028] Preferably, the cutting edge of the front chamfered blade is provided with an arc-shaped chip groove.

[0029] Preferably, there are two front chamfering modules and two rear chamfering modules, and they are both configured to be centrally symmetrical about the tool holder axis.

[0030] Preferably, the rear chamfering module includes: a rear chamfering tool holder fixed to the mounting hole, and a chamfering blade fixed to the rear chamfering tool holder.

[0031] This utility model has at least the following beneficial effects: by setting a front chamfering module and a rear chamfering module, the bottom and top surfaces of the workpiece through hole are chamfered in one go, eliminating the need to flip the workpiece, which greatly reduces the labor intensity of processing; and the chamfer size of the bottom and top surfaces can be controlled separately, resulting in higher chamfering accuracy; the installation position of the rear chamfering module at the rear end of the tool holder can be adjusted according to the workpiece thickness to adapt to different workpieces, thus having a wider range of applications.

[0032] Other advantages, objectives and features of this invention will be apparent in part from the description which follows, and in part from the understanding of those skilled in the art through study and practice of this invention. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the adjustable double-sided chamfering knife in one embodiment of the present invention;

[0034] Figure 2 This is a partial cross-sectional view of an adjustable double-sided chamfering tool in one embodiment of the present invention;

[0035] Figure 3 This is a front view of an adjustable double-sided chamfering blade in one embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the structure of the adjustable double-sided chamfering blade front chamfering blade in one embodiment of the present invention;

[0037] Figure 5 This is a front view of an adjustable double-sided chamfering blade with a bidirectional chamfering insert, according to one embodiment of the present invention.

[0038] Figure 6 This is a front view of an adjustable double-sided chamfering blade with a single-sided chamfering blade, according to one embodiment of the present invention.

[0039] The diagram is labeled as follows: 1. Front chamfering module, 11. Front chamfering tool holder, 111. Square hole, 12. Front chamfering blade, 121. Slide groove, 1211. Top pin sliding slope, 1212. Top pin locking surface, 122. Arc-shaped chip groove, 123. Cutting edge II, 124. Chamfering surface, 125. Cutting edge I, 13. Blade top pin, 14. Elastic element, 141. Spring, 142. Bolt I, 2. Support module, 21. Module body, 211. Chip removal groove, 212. Coolant delivery channel, 213. Water outlet, 214. Positioning platform, 22. Baffle, 23. Front copper sleeve, 24. Rear copper sleeve, 3. Tool holder, 31. ABS connection module, 32. Mounting groove, 321. Mounting hole, 4. Rear chamfering module, 41. Rear chamfering tool holder, 42. Chamfering blade. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0041] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not list the presence or addition of one or more other elements or combinations thereof.

[0042] It should be noted that in the description of this utility model, the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0044] Furthermore, in this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Moreover, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] Example 1

[0046] An adjustable double-sided chamfering tool, its structure is as follows: Figure 1-3 As shown, it includes: a tool holder 3, at least one front chamfering module 1 disposed at the front end of the tool holder 3, and at least one rear chamfering module 4 disposed at the rear end of the tool holder 3;

[0047] The tool holder 3 is provided with a mounting groove 32 for installing the rear chamfering module 4, and the mounting groove 32 is provided with multiple pairs of mounting holes 321 for fixing the rear chamfering module 4 along the extension direction of the tool holder 3.

[0048] In practical applications, the tool holder 3 and the rear chamfering module 4 are fixed by two bolts II. The mounting hole 321 is configured as a screw hole that matches the bolts II to ensure the stability of the rear chamfering module 4. When processing some special workpieces, workpiece materials or process requirements, the front chamfering module 1 and the rear chamfering module 4 can be used together to perform double-sided chamfering on the workpiece, which can effectively improve the chamfering accuracy of the workpiece. At the same time, the size of the chamfer on both sides of the workpiece can be adjusted separately according to special requirements to achieve special process requirements.

[0049] Working principle: Adjust the installation position of the rear chamfering module 4 according to the workpiece thickness; install the front chamfering module 1 at the front end of the tool holder 3. When performing the chamfering operation, first continuously insert the rotating tool into the through hole of the workpiece until the blade of the rear chamfering module 4 contacts the through hole opening, and the chamfering work begins. At this time, the chamfering size and accuracy can be controlled by different speeds and tool feed distances to complete the chamfering operation on the top of the workpiece; the longer the cutting edge of the blade of the rear chamfering module 4 is, the wider the adjustable range of the chamfering size will be; when the chamfering size meets the requirements, the tool retraction command can be issued. During the tool retraction process, the front chamfering module 1 performs chamfering on the reverse face of the workpiece, and can achieve, for example, inconsistent chamfering sizes on the front and back faces or other process requirements.

[0050] By setting the front chamfering module 1 and the rear chamfering module 4, the bottom and top surfaces of the workpiece through hole are chamfered in one go, eliminating the need to flip the workpiece, which greatly reduces the labor intensity of processing; and the chamfer size of the bottom and top surfaces can be controlled separately, resulting in higher chamfering accuracy; the installation position of the rear chamfering module 4 at the rear end of the tool holder 3 can be adjusted according to the workpiece thickness to adapt to different workpieces, making it more widely applicable.

[0051] Example 2

[0052] This second embodiment is a preferred embodiment of the present invention, and its specific structure is as follows: Figure 1-3 As shown, based on embodiment 1, the following improvement is disclosed: the free end of the tool holder 3 is provided with a support module 2 that is detachably connected to it;

[0053] The support module 2 includes: a module body 21 that is detachably connected to the tool holder 3;

[0054] The front copper sleeve 23 is fitted onto the front end of the module body 21;

[0055] The rear copper sleeve 24 is fitted onto the rear end of the module body 21;

[0056] A baffle 22 is installed at the free end of the detachable module to block the front copper sleeve 23;

[0057] The support module 2 has a mounting groove 32 on its surface for placing the front chamfer module 1;

[0058] The diameters of the front copper sleeve 23 and the rear copper sleeve 24 are adapted to the diameter of the through hole of the workpiece, and the front copper sleeve 23 and the rear copper sleeve 24 are respectively arranged on the front and rear sides of the front chamfering module 1.

[0059] The positioning platform 214 on the surface of the module body 21 positions the front copper sleeve 23 and the rear copper sleeve 24.

[0060] The positioning platform 214 is adapted to the position of the front chamfering module 1, and the positioning platform 214 is provided with a chip removal groove 211 in the middle.

[0061] Both the handle 3 and the module body 21 are provided with interconnected coolant delivery channels 212, and the positioning platform 214 is provided with a water outlet 213 on the side opposite to the front chamfer module 1, which is connected to the coolant delivery channel 212.

[0062] In practical applications, the free end of the tool holder 3 is provided with an ABS connecting module 31 that is detachably connected to the support module 2, allowing the tool holder 3 to connect with the support module 2. The front copper sleeve 23 and the rear copper sleeve 24 can be replaced according to the size of the through hole to meet working requirements. The positioning table 214 has a pair of water outlets 213 on the side opposite to a front chamfering module 1; the coolant delivery channel 212 and the water outlet ensure that the workpiece and tool can be cooled in time, and the iron chips generated during cutting can be flushed out by the coolant in time, preventing the iron chips from scratching the machined surface and the hole wall.

[0063] Working Principle: When the cutting tool begins to rotate and enters the through-hole of the workpiece requiring chamfering, the front copper sleeve 23 begins to work, supporting the tool during high-speed rotation. This effectively prevents swaying caused by excessive tool length during rotation and increases cutting stability during subsequent chamfering. As the tool continues to penetrate deeper, the rear copper sleeve 24 enters the workpiece hole and begins to work. The rear copper sleeve 24 and the front copper sleeve 23 simultaneously support the tool, achieving optimal support and allowing the tool to quickly move downwards, thus reducing unnecessary machining time caused by excessive workpiece thickness. During tool retraction and chamfering of the bottom of the workpiece, the rear copper sleeve 24 continues to work, providing effective and stable support for the cutting of the front chamfering insert 4212. Then, as the tool continues to retract, the rear copper sleeve 24 enters the workpiece through-hole and begins to work. The rear copper sleeve 24 and the front copper sleeve 23 simultaneously support the tool, allowing it to quickly exit the workpiece through-hole.

[0064] The front copper sleeve 23 and the rear copper sleeve 24 can support the tool and prevent the tool from wobbling during rotation due to the excessive length of the tool holder during the chamfering process, thereby improving the stability of the chamfering process.

[0065] Example 3

[0066] This third embodiment is a preferred embodiment of the present invention, and its specific structure is as follows: Figure 1-6 As shown, based on embodiment 1, the following improvement is disclosed: the front chamfering module 1 includes: a front chamfering tool holder 11 with a square hole 111;

[0067] A front chamfering insert 4212 is set inside the square hole 111;

[0068] It is set in the front chamfering tool holder 11 to hold the front end of the front chamfering tool 4212 against the tool pin 13 in the square hole 111;

[0069] An elastic element is provided at the rear end of the blade top pin 13 and provides the blade top pin 13 with the thrust of the front chamfering tool holder 11;

[0070] The front chamfering blade 4212 is provided with a groove 121 in the middle for the front end of the blade top pin 13 to slide therein;

[0071] The groove 121 is configured as an inclined top pin sliding slope 1211 on the side near the cutting edge, and as a top pin locking surface 1212 on the side away from the cutting edge to prevent the blade top pin 13 from moving forward.

[0072] In practical applications, the front chamfering insert 4212 has a chamfered surface 124 on the side away from the cutting edge. The elastic element is configured as a spring 141 and a bolt I 142 fixed in the screw hole of the front chamfering tool holder 11 at the rear end of the spring 141. The detachable bolt I 142 facilitates the fixing and replacement of the spring 141. During use, springs 141 with different elastic coefficients can be selected and replaced according to the size of the chamfer to adjust the size of the chamfer and ensure that the chamfer size meets the requirements. The length of the top pin sliding ramp 1211 is adapted to the extension distance of the front chamfering insert 4212 so that the insert top pin 13 does not move out of the top pin sliding ramp 1211 when the front chamfering insert 4212 is pressed into the front chamfering tool holder 11 at its deepest point.

[0073] Working principle: Under normal circumstances, the front chamfering insert 4212 is pushed by the insert top pin 13 to the cutting edge protruding from the front chamfering tool holder 11, and the insert top pin 13 is in close contact with the top pin locking surface 1212; when the pressure on the upper end surface of the front chamfering insert 4212 increases and exceeds the initial set spring force 141, the front chamfering insert 4212 is squeezed into the square hole 111 of the front chamfering tool holder 11.

[0074] During operation, the rotating adjustable front chamfering tool is placed into the through hole of the workpiece. After the front chamfering module 1 passes through the through hole, the tool retracts and moves outward from the through hole. When the front chamfering blade 4212 of the front chamfering module 1 contacts the edge of the through hole, it continues to move outward to perform a chamfering operation on the bottom of the workpiece. At this time, the pressure on the front chamfering blade 4212 also increases until the chamfer size meets the requirements. When the radial pressure is greater than the set spring force of the spring 141, the front chamfering blade 4212 is pressed into the square hole 111 of the front chamfering tool holder 11 and no longer performs chamfering. Then the tool continues to retract, completing the chamfering operation on the bottom of the workpiece.

[0075] Example 4

[0076] This third embodiment is a preferred embodiment of the present invention, and its specific structure is as follows: Figure 6 As shown, based on embodiment 1, the following improvement is disclosed: the front chamfering blade 4212 is configured as a single-sided chamfering blade;

[0077] The single-sided chamfering insert is provided with a cutting edge I125 for chamfering the bottom of the workpiece hole.

[0078] In practical applications, the front bevel of the single-sided chamfering insert extending from the front chamfering tool holder 11 is configured to have no cutting edge, while the rear bevel is provided with a cutting edge I125.

[0079] Working principle: When the single-sided chamfering cutter enters the through hole of the workpiece, the front side of the single-sided chamfering cutter does not cut the workpiece. As the pressure on the single-sided chamfering cutter increases, it gradually retracts into the front chamfering cutter holder 11. During this process, the cutting edge does not contact the side wall of the through hole. After the single-sided chamfering cutter passes through the through hole, the radial pressure on the single-sided chamfering cutter decreases. Under the action of the spring force 141, it extends out of the front chamfering cutter holder 11 and can begin to retract. It moves outward in the opposite direction and pulls out of the through hole. When the cutting edge of the single-sided chamfering cutter contacts the edge of the through hole, it continues to move outward to perform chamfering operation on the bottom of the workpiece. At this time, the pressure on the single-sided chamfering cutter also increases until the chamfer size meets the requirements and the radial pressure is greater than the set spring force 141. The single-sided chamfering cutter is pressed into the square hole 111 of the front chamfering cutter holder 11 and no longer performs chamfering. Then the cutter continues to retract, completing the chamfering operation on the bottom of the workpiece.

[0080] Example 5

[0081] This third embodiment is a preferred embodiment of the present invention, and its specific structure is as follows: Figure 4 , Figure 5 As shown, based on embodiment 1, the following improvement is disclosed: the front chamfering blade 4212 is configured as a bidirectional chamfering blade;

[0082] The bidirectional chamfering insert is provided with two cutting edges II123, one for chamfering the bottom of the workpiece hole and the other for chamfering the top of the workpiece hole.

[0083] Working principle: When the bidirectional chamfering tool enters the through hole of the workpiece, the cutting edge II123 on the front side of the bidirectional chamfering tool contacts the workpiece and cuts. As the tool continues to move into the through hole, the pressure of the bidirectional chamfering tool increases until the chamfer size meets the requirements. When the radial pressure is greater than the set spring force of the spring 141, the bidirectional chamfering tool is pressed into the square hole 111 of the front chamfering tool holder 11, completing the chamfering operation on the top of the workpiece. Once the bidirectional chamfering cutter passes through the through hole, the radial pressure on the bidirectional chamfering cutter decreases. Under the action of the spring force of spring 141, the front chamfering cutter holder 11 extends outward, and the cutter can begin to retract. It moves outward in the opposite direction and pulls out of the through hole. When the cutting edge II 123 on the rear side of the bidirectional chamfering cutter contacts the edge of the through hole, it continues to move outward to perform a chamfering operation on the bottom of the workpiece. At this time, the pressure on the bidirectional chamfering cutter also increases until the chamfer size meets the requirements and the radial pressure is greater than the set spring force of spring 141. The bidirectional chamfering cutter is pressed into the square hole 111 of the front chamfering cutter holder 11, and chamfering is no longer performed. Then the cutter continues to retract, completing the chamfering operation on the bottom of the workpiece.

[0084] Example 6

[0085] This third embodiment is a preferred embodiment of the present invention, and its specific structure is as follows: Figure 4-6 As shown, based on embodiment 1, the following improvement is disclosed: the cutting edge side of the front chamfering blade 4212 is provided with an arc-shaped chip groove 122.

[0086] Working principle: The arc-shaped chip groove 122 can curl the chips generated by cutting into a specific shape, making them easier to break and discharge, preventing chips from getting tangled on the tool or workpiece, and ensuring smooth processing.

[0087] Example 7

[0088] This third embodiment is a preferred embodiment of the present invention, and its specific structure is as follows: Figure 1-3 As shown, based on embodiment 1, the following improvements are disclosed: the front chamfer module 1 and the rear chamfer module 4 are both set as two, and they are both configured to be centrally symmetrical about the axis of the tool holder 3.

[0089] Working principle: The front chamfering module 1 and the rear chamfering module 4 are both configured as a pair of centrally symmetrical pairs with the axis of the tool holder 3 as the center of symmetry, which can improve the stability of the tool and avoid tool eccentricity;

[0090] Example 8

[0091] This embodiment 1 is a preferred embodiment of the present invention, and its specific structure is as follows: Figure 1 , Figure 3 As shown, based on embodiment 1, the following improvement is disclosed: the rear chamfering module 4 includes: a rear chamfering tool holder 41 fixed to the mounting hole 321, and a chamfering blade 42 fixed to the rear chamfering tool holder 41.

[0092] In practical applications, the chamfering blade 42 is configured as a triangular indexable blade, which does not require frequent blade replacement and can continue to be used by indexing. It has low operating cost, high precision, and good stability.

[0093] During the entire working process of the tool, the front chamfering insert 4212 is pressed in and ejected by the pressure of the hole wall and the spring 141. The size of the chamfer can be adjusted by adjusting the spring force of the spring 141, replacing the chamfering insert 42, or changing the machining parameters. The bidirectional chamfering tool can complete the chamfering of the front and back of the hole in one go, and does not need to change the rotation direction of the tool during the process. It has the advantages of strong adaptability, good stability, and high machining efficiency.

[0094] In practical applications, when there are no requirements for the chamfering accuracy of ordinary workpieces, the machining can be completed simply by installing a bidirectional chamfering insert at the tip of the tool.

[0095] According to the processing requirements, select the corresponding bidirectional chamfering insert, then install it into the front chamfering tool holder 11. Next, assemble the front chamfering tool holder 11 with the support module 2. Finally, securely connect the support module 2 and the tool holder 3 according to the interface. The entire tool assembly is complete and ready for processing. At the start of processing, the tool quickly moves above the workpiece to be chamfered, the coolant is turned on, and the tool begins to rotate and enter the workpiece hole to be chamfered. After entering the hole, the front copper sleeve 23 begins to work, supporting the tool during high-speed rotation. This effectively prevents swaying caused by the excessive length of the tool holder 3 during rotation, and also increases the stability of the cutting edge of the front chamfering insert 4212 during subsequent chamfering insert 42 operation. As the cutting tool penetrates a certain distance into the workpiece, the cutting edge II 123 on the front side of the bidirectional chamfering insert first contacts the hole opening. The rotation of the cutting edge II 123 on the front side smooths the hole opening and removes burrs, and then the chamfering begins. Because one of the water outlet holes 213 of the tool is directly opposite the cutting edge of the cutting edge II 123, the iron chips generated during machining are immediately flushed out by the coolant, preventing the iron chips from scratching the machined surface and the hole wall, and also reducing the temperature of the cutting edge II 123 on the front side. As the tool continues to penetrate deeper, the chamfered surface area 124 of the hole opening becomes larger and larger until the chamfer size meets the requirements. At this time, the pressure on the upper end face of the front chamfering insert 4212 also becomes larger and larger. When the radial pressure is greater than the initially set spring force 141, the front chamfering insert 4212 is pressed into the square hole 111 of the front chamfering tool holder 11, and the chamfering stops. As the cutting tool continues to penetrate deeper, the rear copper sleeve 24 enters the workpiece hole and begins operation. The rear copper sleeve 24 and the front copper sleeve 23 simultaneously support the cutting tool, achieving optimal support and allowing the tool to move downwards quickly, thus reducing unnecessary machining time caused by excessive workpiece thickness. As the cutting tool continues to extend until the position of the bidirectional chamfering insert exceeds the workpiece thickness, the radial pressure on the front chamfering insert 4212 decreases, and it extends out of the square hole 111 under the force of the spring 141. Once the front chamfering insert 4212 extends out of the cutting tool's square hole 111, the cutting tool can begin to retract. Although the front copper sleeve 23 will also exit its working state due to the exposed workpiece and will no longer fulfill its supporting function, the rear copper sleeve 24 continues to work, providing effective and stable support for the cutting tool and the front cutting edge during cutting. During the retraction process, the cutting edge II 123 on the rear side of the bidirectional chamfering insert first contacts the hole opening, smoothing the opening and removing burrs, before chamfering begins. Since the other water outlet 213 of the tool is directly opposite the rear cutting edge II 123, the metal chips generated during machining are immediately flushed out by the coolant, preventing them from scratching the machined surface and hole wall, while also reducing the temperature of the rear cutting edge. As the retraction continues, the chamfered area 124 of the hole opening increases until the chamfer size meets the requirements. The pressure on the front chamfering insert 4212 also increases. When the radial pressure exceeds the set spring force 141, the front chamfering insert 4212 is pressed into the square hole 111, retracting into the workpiece hole, and chamfering ceases.The cutting tool continues to retract, and the rear copper sleeve 24 enters the workpiece hole to begin machining. The rear copper sleeve 24 and the front copper sleeve 23 simultaneously support the cutting tool, allowing it to quickly exit the machined hole and proceed to the next workpiece hole. Chamfering on both sides can be completed without changing the tool.

[0096] The above solutions are merely illustrative examples of preferred embodiments, but are not limited thereto. When implementing this invention, appropriate substitutions and / or modifications can be made according to the user's needs.

[0097] The number of devices and processing scale described herein are for the purpose of simplifying the description of this utility model. Applications, modifications, and variations of this utility model will be readily apparent to those skilled in the art.

[0098] Although embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for this utility model. Other modifications can be readily implemented by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and examples shown and described herein.

Claims

1. An adjustable double-sided chamfering tool, comprising: A tool holder, comprising at least one front chamfer module disposed at the front end of the tool holder, characterized in that it further comprises at least one rear chamfer module disposed at the rear end of the tool holder; The tool holder is provided with a mounting groove for installing a rear chamfering module, and the mounting groove is provided with multiple pairs of mounting holes for fixing the rear chamfering module along the extension direction of the tool holder.

2. The adjustable double-sided chamfering tool as described in claim 1, characterized in that, The free end of the tool holder is provided with a support module that is detachably connected to it; The support module includes: a module body that is detachably connected to the tool holder; The front copper sleeve fitted onto the front end of the module body; The rear copper sleeve is fitted onto the rear end of the module body; A baffle is installed at the free end of the detachable module to block the front copper sleeve; The support module has a mounting groove on its surface for placing the front chamfer module; The diameters of the front and rear copper sleeves are adapted to the diameter of the through hole in the workpiece, and the front and rear copper sleeves are respectively set on the front and rear sides of the front chamfering module.

3. The adjustable double-sided chamfering tool as described in claim 2, characterized in that, The positioning platform on the main surface of the module is used to position the front and rear copper sleeves. The positioning platform is adapted to the position of the front chamfering module, and a chip removal groove is provided in the middle of the positioning platform; Both the tool holder and the module body are provided with interconnected coolant delivery channels, and the positioning platform is provided with a water outlet on the side opposite to the front chamfering module that is connected to the coolant delivery channels.

4. The adjustable double-sided chamfering tool as described in claim 1, characterized in that, The front chamfering module includes: a front chamfering tool holder with a square hole; A front chamfering insert set inside a square hole; It is set in the front chamfering tool holder to hold the front end of the front chamfering tool in the square hole of the tool pin; An elastic element is located at the rear end of the blade top pin and provides the blade top pin with the push force of the chamfering tool holder before ejection. The front chamfering blade has a groove in the middle for the front end of the blade top pin to slide therein; The groove is configured as an inclined sliding ramp for the top pin on the side near the cutting edge, and as a locking surface for the top pin that prevents the blade top pin from moving forward on the side away from the cutting edge.

5. The adjustable double-sided chamfering cutter as described in claim 4, characterized in that, The front chamfering blade is configured as a single-sided chamfering blade; The single-sided chamfering insert is provided with a cutting edge I for chamfering the bottom of the workpiece hole.

6. The adjustable double-sided chamfering tool as described in claim 4, characterized in that, The front chamfering blade is configured as a bi-directional chamfering blade; The bidirectional chamfering insert is provided with two cutting edges II, one for chamfering the bottom of the workpiece hole and the other for chamfering the top of the workpiece hole.

7. The adjustable double-sided chamfering cutter as described in claim 4, characterized in that, The cutting edge of the front chamfered blade is provided with an arc-shaped chip groove.

8. The adjustable double-sided chamfering tool as described in claim 1, characterized in that, The front chamfering module and the rear chamfering module are both set in pairs, and they are both configured to be centrally symmetrical with the tool holder axis as the center of symmetry.

9. The adjustable double-sided chamfering tool as described in claim 1, characterized in that, The rear chamfering module includes: a rear chamfering tool holder fixed to the mounting hole, and a chamfering blade fixed to the rear chamfering tool holder.

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