Disc milling cutter with adjustable cutter distance

Abstract

The utility model discloses a disc milling cutter with an adjustable cutter distance, which relates to the technical field of milling cutters and comprises a cutter handle, a guide groove is formed in the outer wall of the cutter handle along the circumferential direction, and a clearance groove is formed in the guide groove; a transmission groove communicating with the receding groove is further formed in the cutter handle, and a limiting ring is coaxially and fixedly installed in the transmission groove. An Archimedes spiral guide rail is coaxially and fixedly installed on the lower wall face of the adjusting frame, and the adjusting frame is rotationally connected to the upper portion of the limiting ring; an adjusting assembly is fixed to the outer wall face of the adjusting frame and rotationally matched with the guide groove in the circumferential direction. The adjusting seat ring, the transmission gear and the driven gear are meshed and linked to drive the adjusting frame and the Archimedes spiral guide rail to rotate, the spiral guide rail and the tool rest meshing groove are matched to pull the multiple tool rests to synchronously and radially slide, and the matching mode that the graduated scale and the indication line are used for real-time benchmarking of the adjusting amount is combined. The problems that tool distance adjustment is not synchronous, no visual reference exists, and the batch machining adaptation efficiency is low are solved.

Description

Technical Field

[0001] This utility model relates to the field of milling cutter technology, specifically to a disc milling cutter with adjustable tool spacing. Background Technology

[0002] Disc milling cutters are core tools used in CNC machining for milling planes, grooves, and stepped surfaces. They feature a disc-shaped cutter body with indexable carbide inserts, and the cutter body is equipped with precision positioning grooves and chip removal channels. They are characterized by high cutting efficiency, uniform cutting edge distribution, and high repeatability. They are compatible with milling machines and machining centers and are widely used in the batch processing of mechanical parts, molds, and box-shaped workpieces, ensuring stable surface roughness and dimensional accuracy.

[0003] For example, utility model patent CN221791173U discloses a finely adjustable disc milling cutter, which relates to the field of milling. The cutter includes a fixed ring with a fixed disk connected to its side, a cutter head connected to the bottom of the fixed disk, and a fixing member connected through the cutter head. This finely adjustable disc milling cutter allows the threaded rod to rotate, driving a slider to slide along the thread. This sliding motion pushes the cutter head outwards for fine adjustment, changing the milling diameter and achieving adjustability. Because the roller and guide groove are in close contact, the roller provides lateral support to the slider. Increased slider support strength results in more stable cutting force on the cutter head, improving the stability of the milling cutter. After the fixing member slides to the designated position, the positioning block resets under the action of a spring, positioning the fixing member and preventing loosening or detachment, thus improving the safety and stability of the cutter head.

[0004] However, this type of disc milling cutter has the following shortcomings:

[0005] Low precision and inability to synchronize tool distance adjustment: The single tool head independent fine adjustment mode relies on the threaded rod to drive the movement of a single slider. The adjustment of multiple tool heads is not synchronized, and there is no visual reference. Repeated trial cutting and debugging are required when changing tools, resulting in low efficiency for batch processing.

[0006] Insufficient tool post stability: It only provides simple support through rollers and guide grooves, resulting in weak load-bearing capacity during cutting and easy tool head wobbling; the anti-disengagement of the fixing parts relies on spring positioning blocks, which still poses a risk of loosening during high-speed milling.

[0007] Poor protection: Without a dedicated sealing and flow guiding structure, cutting debris and oil stains can easily enter the internal areas of the slide and rotating groove, causing component wear and jamming, affecting adjustment accuracy and service life. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model provides a disc milling cutter with adjustable tool spacing, which solves the technical problems of low tool spacing adjustment accuracy, inability to synchronize, insufficient tool post stability, and poor protection in existing devices.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] An adjustable-distance disc milling cutter, comprising:

[0011] The tool holder has a guide groove circumferentially formed on its outer wall, and a clearance groove is formed in the guide groove; the tool holder also has a transmission groove communicating with the clearance groove, and a limit ring is coaxially fixedly installed in the transmission groove.

[0012] The adjusting frame has an Archimedes spiral guide rail coaxially fixedly installed on its lower wall and rotatably connected above the limiting ring;

[0013] An adjustment component is fixed to the outer wall of the adjustment frame, and the adjustment component is adapted to rotate circumferentially with the guide groove.

[0014] Several guide holes are evenly distributed along the circumference of the tool holder and penetrate through the outer wall surface of the tool holder;

[0015] Several tool holders have meshing grooves on their upper end faces that mesh with Archimedes spiral guide rails, and each groove corresponds to a number of guide holes for sliding adaptation.

[0016] Preferably, the adjusting assembly includes a transmission gear, which is rotatably connected to the clearance groove via a gear shaft; the outer end of the transmission gear meshes with an adjusting seat ring, which is rotatably connected to a guide groove, and its outer wall extends from the inner side of the guide groove to the outer side of the tool holder; a rotating sleeve is fixedly installed on the lower wall of the extended portion of the adjusting seat ring, and the rotating sleeve is rotatably connected to the outer wall of the tool holder; the inner end of the transmission gear meshes with a driven gear, and the driven gear is coaxially fixedly connected to the adjusting frame.

[0017] Preferably, the lower wall of the rotating sleeve is evenly provided with several slots along the circumference; a support ring is fixedly installed on the outer wall of the tool handle, and several guide sleeves are evenly fixedly installed on the upper wall of the support ring along the circumference; a sliding rod is slidably connected inside each of the several guide sleeves, and a retaining ring sleeved on the outer wall of the tool handle is fixedly connected to the upper end of the sliding rod; several retaining blocks are fixedly installed on the upper wall of the retaining ring, and the retaining blocks are inserted and adapted to the slots one by one.

[0018] Preferably, a conical guide cover is fixedly fitted on the outer wall of the handle above the adjustment seat; the outer wall of the conical guide cover is uniformly engraved with a scale along the circumference, and the outer wall of the adjustment seat is provided with an indicator line corresponding to the scale.

[0019] Preferably, a retaining ring is fixedly installed at the upper end of the guide sleeve, and a stop block is fixedly installed at the lower end of the sliding rod; a sealing ring is embedded in the retaining ring, and the sealing ring is slidably adapted to the outer wall of the sliding rod; a return spring is provided inside the guide sleeve, and the two ends of the return spring are fixedly connected to the stop block and the inner bottom wall of the guide sleeve, respectively.

[0020] Preferably, each of the two side walls inside the guide holes is provided with a sliding groove; a load-bearing slide rail is fixedly installed on both sides of the tool holder, and the load-bearing slide rail and the sliding groove are slidably adapted to each other.

[0021] Preferably, an auxiliary ring is coaxially fixedly installed on the upper wall of the adjusting frame; a plane bearing is fixedly installed on the upper end face of the limiting ring, and the upper end face of the plane bearing is rotatably engaged with the lower end face of the auxiliary ring.

[0022] Beneficial effects

[0023] This utility model provides a disc milling cutter with adjustable tool spacing, which has the following beneficial effects:

[0024] By adjusting the seat ring, transmission gear, and driven gear meshing and linkage, the adjusting frame and Archimedes spiral guide rail are driven to rotate. The spiral guide rail and the tool holder meshing groove cooperate to pull multiple tool holders to slide radially synchronously. Combined with the real-time calibration of the adjustment amount by the scale and indicator line, the problems of asynchronous tool distance adjustment, lack of visual reference, and low batch processing adaptation efficiency are solved.

[0025] By providing bidirectional guidance and load bearing through the tight sliding fit between the load-bearing slide rail and the slide groove, the return spring pushes the card block to insert into the card groove to lock the adjusting seat ring, and the plane bearing and auxiliary ring cooperate to reduce the rotational friction of the adjusting frame, the problems of weak cutting load of the tool holder, easy shaking and easy tool distance deviation during high-speed milling are solved;

[0026] By using a conical guide cap to block flying debris and guide the cooling medium to the cutting zone, and a sealing ring to tightly fit the outer wall of the sliding rod to isolate impurities, the problem of cutting debris and oil stains easily invading the interior and causing component wear and jamming is solved. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a cross-sectional view illustrating the overall structure of this utility model.

[0029] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0030] Figure 4 This is a schematic diagram of the knife handle structure of this utility model;

[0031] Figure 5 This is a schematic diagram of the adjustment frame structure of this utility model;

[0032] Figure 6 This is a schematic diagram of the tool holder structure of this utility model.

[0033] In the diagram: 1. Tool holder; 2. Guide groove; 3. Clearance groove; 4. Transmission groove; 5. Limiting ring; 6. Adjusting bracket; 7. Archimedes spiral guide rail; 8. Guide hole; 9. Tool holder; 10. Meshing groove; 11. Transmission gear; 12. Gear shaft; 13. Adjusting seat ring; 14. Rotating sleeve; 15. Driven gear; 16. Slot; 17. Support ring; 18. Guide sleeve; 19. Sliding rod; 20. Snap ring; 21. Snap block; 22. Conical guide cover; 23. Scale; 24. Retaining ring; 25. Stop block; 26. Sealing ring; 27. Return spring; 28. Slide groove; 29. ​​Load-bearing slide rail; 30. Auxiliary ring; 31. Flat bearing. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0035] Please see Figures 1-6 An adjustable-distance disc milling cutter, comprising:

[0036] The tool holder 1 has a guide groove 2 circumferentially formed on its outer wall, and a clearance groove 3 is formed in the guide groove 2; the tool holder 1 also has a transmission groove 4 communicating with the clearance groove 3, and a limit ring 5 is coaxially fixedly installed in the transmission groove 4.

[0037] The adjusting frame 6 has an Archimedes spiral guide rail 7 coaxially fixedly installed on its lower wall surface and is rotatably connected above the limiting ring 5;

[0038] An adjustment component is fixed to the outer wall of the adjustment frame 6, and the adjustment component is adapted to the guide groove 2 to rotate circumferentially;

[0039] Several guide holes 8 are evenly distributed along the circumference of the tool holder 1 and penetrate the outer wall surface of the tool holder 1.

[0040] Several tool holders 9 have meshing grooves 10 on their upper end faces that mesh with Archimedes spiral guide rails 7, and each groove is slidably adapted to a number of guide holes 8.

[0041] In use, the tool holder 1 provides the mounting base and load-bearing support for the overall structure; the guide groove 2 provides circumferential rotation adaptation space for the adjustment component; the clearance groove 3 provides clearance space for the installation and movement of the adjustment component; the transmission groove 4 provides installation space for components such as the limit ring 5 and the adjustment frame 6 and realizes structural connection; the limit ring 5 plays an axial limiting role for the adjustment frame 6, ensuring its stable rotation; the adjustment frame 6 drives the Archimedes spiral guide rail 7 to rotate synchronously, transmitting the adjustment power; the Archimedes spiral guide rail 7, through meshing with the engagement groove 10, converts the rotational motion into the radial movement of the tool holder 9; the adjustment component drives the adjustment frame 6 to rotate through circumferential rotation, realizing tool pitch adjustment; the guide hole 8 provides radial sliding guidance for the tool holder 9, ensuring accurate movement direction; the tool holder 9 is used to install milling cutter inserts, and the tool pitch is adjusted through radial movement; the engagement groove 10 meshes with the Archimedes spiral guide rail 7, transmitting power to drive the tool holder 9 to move.

[0042] The adjustment assembly includes a transmission gear 11, which is rotatably connected to the clearance groove 3 via a gear shaft 12; the outer end of the transmission gear 11 is engaged with an adjustment seat ring 13, which is rotatably connected to the guide groove 2, and its outer wall extends from the inner side of the guide groove 2 to the outer side of the tool holder 1; a rotating sleeve 14 is fixedly installed on the lower wall of the extended portion of the adjustment seat ring 13, and the rotating sleeve 14 is rotatably connected to the outer wall of the tool holder 1; the inner end of the transmission gear 11 is engaged with a driven gear 15, which is coaxially fixedly connected to the adjustment frame 6.

[0043] In use, the transmission gear 11 transmits power between the adjusting seat ring 13 and the driven gear 15; the gear shaft 12 provides rotational support for the transmission gear 11 to ensure stable meshing and transmission; the adjusting seat ring 13 allows the operator to apply force to rotate it, transmitting adjustment power; the rotating sleeve 14 enhances the stability of the adjusting seat ring 13 during rotation and prevents deviation; the driven gear 15 transmits the power of the transmission gear 11 to the adjusting frame 6, driving it to rotate synchronously.

[0044] The lower wall of the rotating sleeve 14 is evenly provided with several slots 16 along the circumference; a support ring 17 is fixedly installed on the outer wall of the tool holder 1, and several guide sleeves 18 are evenly fixedly installed on the upper wall of the support ring 17 along the circumference; a sliding rod 19 is slidably connected inside each of the several guide sleeves 18, and a retaining ring 20 sleeved on the outer wall of the tool holder 1 is fixedly connected to the upper end of the sliding rod 19; several retaining blocks 21 are fixedly installed on the upper wall of the retaining ring 20, and the retaining blocks 21 are inserted and matched one-to-one with the slots 16.

[0045] In use, the slot 16 and the block 21 are inserted and matched to achieve the positioning and locking of the adjusting seat ring 13; the support ring 17 provides installation support for the guide sleeve 18; the guide sleeve 18 provides sliding guidance for the sliding rod 19 to ensure its precise axial movement; the sliding rod 19 drives the retaining ring 20 and the block 21 to achieve lifting and lowering movement; the retaining ring 20 synchronously drives several blocks 21 to move, ensuring the synchronization of locking or unlocking; when the block 21 is inserted into the slot 16, it locks the adjusting seat ring 13 to prevent it from rotating accidentally, and when it is pulled out, it unlocks.

[0046] A conical guide cover 22 is fixedly fitted on the outer wall of the handle 1 above the adjusting seat ring 13; a scale 23 is uniformly engraved on the outer wall of the conical guide cover 22 along the circumference, and an indicator line corresponding to the scale 23 is provided on the outer wall of the adjusting seat ring 13.

[0047] During use, the conical guide cover 22 provides protection while guiding the cooling medium to the cutting area; the scale 23, in conjunction with the indicator line, provides a precise reference for tool distance adjustment, enabling visual and quantitative adjustment.

[0048] A retaining ring 24 is fixedly installed at the upper end of the guide sleeve 18, and a stop block 25 is fixedly installed at the lower end of the sliding rod 19; a sealing ring 26 is embedded in the retaining ring 24, and the sealing ring 26 is slidably adapted to the outer wall of the sliding rod 19; a return spring 27 is provided inside the guide sleeve 18, and the two ends of the return spring 27 are fixedly connected to the stop block 25 and the inner bottom wall of the guide sleeve 18, respectively.

[0049] In use, the retaining ring 24, together with the stop block 25, restricts the upward stroke of the sliding rod 19 to prevent excessive movement; the sealing ring 26 prevents cutting debris, oil stains and other impurities from entering the guide sleeve 18, ensuring smooth sliding of the sliding rod 19; the return spring 27 provides a return force for the sliding rod 19, so that the locking block 21 always remains in the locked state of being inserted into the slot 16.

[0050] Several guide holes 8 have grooves 28 on both sides of the inner side wall; the two sides of the tool holder 9 are fixedly installed with load-bearing slide rails 29, and the load-bearing slide rails 29 and the grooves 28 are slidably adapted to each other.

[0051] In use, the slide groove 28 cooperates with the load-bearing slide rail 29 to provide bidirectional guidance for the tool holder 9 and enhance sliding stability; the load-bearing slide rail 29 bears the cutting load of the tool holder 9, reduces sliding friction, and ensures that the radial movement of the tool holder 9 is smooth and accurate.

[0052] An auxiliary ring 30 is coaxially fixedly installed on the upper wall of the adjusting frame 6; a plane bearing 31 is fixedly installed on the upper end face of the limiting ring 5, and the upper end face of the plane bearing 31 is rotatably engaged with the lower end face of the auxiliary ring 30.

[0053] In use, the auxiliary ring 30 increases the contact area between the adjusting frame 6 and the plane bearing 31 to ensure uniform force distribution; the plane bearing 31 reduces the friction when the adjusting frame 6 rotates, reduces the adjustment resistance, and improves the smoothness of rotation and the adjustment accuracy.

[0054] Example 1: In this example, the precise synchronous adjustment of the tool distance is achieved through gear transmission in conjunction with the Archimedes spiral guide rail 7 and the scale ruler 23 for visual reference. This adapts to the batch milling needs of workpieces of different specifications and avoids repeated adjustments of the tool axis position due to tool deviation when changing tools.

[0055] Specifically, when adjusting the blade spacing, first press down on the retaining ring 20, causing the sliding rod 19 to slide down along the guide sleeve 18, compressing the return spring 27, disengaging the retaining block 21 from the retaining groove 16 of the rotating sleeve 14, and releasing the lock of the adjusting seat ring 13. Observe the scale 23 on the conical guide cover 22, rotate the adjusting seat ring 13, and use the indicator line on its outer wall as an adjustment reference. The adjusting seat ring 13 drives the meshing transmission gear 11 to rotate around the gear shaft 12, and the transmission gear 11 then drives the driven gear 15 to rotate, thereby driving the adjusting frame 6 to rotate synchronously.

[0056] The Archimedes spiral guide rail 7 on the lower wall of the adjusting frame 6 engages with the meshing groove 10 of the tool holder 9, converting the rotational motion into radial movement of the tool holder 9. The tool holder 9 slides smoothly along the slide groove 28 of the guide hole 8 via the load-bearing slide rails 29 on both sides. Multiple tool holders 9 extend and retract synchronously in the circumferential direction, achieving uniform adjustment of the tool distance. When the indicator line is aligned with the target scale, the retaining ring 20 is released, the return spring 27 pushes the sliding rod 19 upward, the retaining block 21 inserts into the corresponding retaining groove 16, and the adjusting seat ring 13 is locked to prevent tool distance deviation during processing. The entire adjustment process is visualized and quantitatively precise, eliminating the need for repeated trial cuts and significantly improving batch processing efficiency.

[0057] Example 2: In this example, the stability of the tool holder during milling is ensured by a load-bearing guide structure and a locking protection design, while simplifying the maintenance process and adapting to long-term continuous machining scenarios.

[0058] Specifically, during cutting operations, the load-bearing slide rails 29 on both sides of the tool holder 9 fit tightly against the slide grooves 28, providing precise radial guidance and bearing the radial load generated during milling, preventing the tool holder 9 from wobbling or shifting. The adjusting seat ring 13 is locked by the insertion of the locking block 21 into the locking groove 16, and with the continuous clamping force of the return spring 27, it ensures no loosening during rotation, guaranteeing stable tool pitch. The conical guide cover 22 guides the cooling medium to the cutting area while blocking cutting debris from splashing and protecting the adjusting components.

[0059] The sealing ring 26 inside the guide sleeve 18 tightly fits the sliding rod 19, preventing cutting fluid and metal shavings from entering the guide sleeve and avoiding corrosion of the return spring 27 or jamming of the sliding rod. The adjusting bracket 6 rotates with the plane bearing 31 on the limiting ring 5 via the auxiliary ring 30, reducing rotational friction, thus lowering adjustment resistance and ensuring stability during high-speed rotation. During maintenance, simply press the retaining ring 20 to unlock, and rotate the adjusting seat ring 13 to retract the tool holder 9, facilitating the cleaning of residual debris on the guide hole 8 and the tool holder 9. No disassembly of the entire structure is required, making maintenance convenient and efficient.

[0060] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A disc cutter with adjustable cutter spacing, characterized by, The utility model relates to a cutting tool handle, which comprises a cutting tool handle (1) and an adjusting frame (6). The adjusting frame (6) is coaxially fixedly connected to the upper side of the limiting ring (5) and is provided with an Archimedes spiral guide rail (7) on the lower wall. The adjusting assembly is fixed to the outer wall of the adjusting frame (6) and is rotationally matched with the guide groove (2) in the circumferential direction. A plurality of guide holes (8) are evenly distributed along the circumferential direction of the cutting tool handle (1) and penetrate through the outer wall of the cutting tool handle (1). A plurality of tool holders (9) are provided on the upper end surface of the cutting tool handle (1) and are slidably matched with the plurality of guide holes (8) in a one-to-one correspondence. The adjusting assembly comprises a transmission gear (11) which is rotationally connected to the emptying groove (3) through a gear shaft (12).

2. A disc cutter with adjustable cutter spacing as set forth in claim 1, characterized in that, The outer end of the transmission gear (11) is engaged with an adjusting seat ring (13) which is rotationally connected to the guide groove (2) and extends from the inner side of the guide groove (2) to the outer side of the cutting tool handle (1).

3. A disc cutter with adjustable cutter spacing as set forth in claim 2, characterized in that, The lower wall of the extending part of the adjusting seat ring (13) is fixedly connected with a rotating sleeve (14) which is rotationally connected to the outer wall of the cutting tool handle (1).

4. A disc cutter with adjustable cutter spacing as set forth in claim 2, wherein, The inner end of the transmission gear (11) is engaged with a driven gear (15) which is coaxially fixedly connected to the adjusting frame (6).

5. A disc cutter with adjustable cutter spacing as set forth in claim 3, characterized in that, The lower wall of the rotating sleeve (14) is evenly provided with a plurality of clamping grooves (16) in the circumferential direction. The outer wall of the cutting tool handle (1) is fixedly connected with a supporting ring (17) which is fixedly connected with a plurality of guide sleeves (18) on the upper wall in the circumferential direction. The upper end of the guide sleeve (18) is fixedly connected with a stop ring (24), and the lower end of the sliding rod (19) is fixedly connected with a stop block (25). The guide sleeve (18) is provided with a return spring (27), and the two ends of the return spring (27) are fixedly connected with the stop block (25) and the inner bottom wall of the guide sleeve (18), respectively.

6. A disc cutter with adjustable cutter spacing as set forth in claim 1, characterized in that, Both side walls inside several guiding holes (8) are provided with sliding grooves (28); both side faces of the tool holder (9) are fixedly provided with bearing sliding rails (29), which are in one-to-one sliding fit with the sliding grooves (28).

7. A disc cutter with adjustable cutter spacing as set forth in claim 1, wherein, The upper wall face of the adjusting frame (6) is coaxially fixedly provided with an auxiliary ring (30); the upper end face of the limiting ring (5) is fixedly provided with a plane bearing (31), and the upper end face of the plane bearing (31) is in rotary fit with the lower end face of the auxiliary ring (30).

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