A stainless steel bar cutting device
By introducing a chip entanglement mechanism and a cleaning system into the stainless steel bar cutting device, the problem of chip entanglement in stainless steel bar turning was solved, the machining accuracy and tool life were improved, and the cooling and chip removal effects of the cutting fluid were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TAIZHOU TEHU METAL PRODUCTS CO LTD
- Filing Date
- 2026-03-24
- Publication Date
- 2026-06-09
AI Technical Summary
In the turning of stainless steel bars, it is difficult to effectively break and orderly remove chips, resulting in long, coiled chips wrapping around the tool, which affects machining accuracy, surface quality and tool life.
A stainless steel bar cutting device was designed, which adopts a chip wrapping mechanism, including a rotating roller, a chip wrapping column, and a cutting blade. The cutting fluid impacts the long rolled chips, causing them to swing towards the rotating roller. The chip wrapping column captures the chips, and the cutting blade cuts them, achieving the cutting and autonomous detachment of the long rolled chips. At the same time, a chip removal plate and a return spring are used for active cleaning.
It effectively avoids long chips entanglement around the tool, improves the cutting quality of the bar surface, extends the continuous working time of the chip entanglement mechanism, prevents the cooling of the cutting fluid from deteriorating and the surface from scratching, and extends the tool life.
Smart Images
Figure CN122164948A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of bar cutting technology, specifically to a stainless steel bar cutting device. Background Technology
[0002] In the field of turning, for forming operations such as outer diameter, end face, and grooving of bar stock, the lathe spindle typically clamps and drives the bar stock to rotate at high speed, while the cutting tool moves in a linear feed motion along the radial or axial direction of the workpiece, achieving material removal through shearing. However, when machining austenitic alloys such as stainless steel, due to the high ductility and low thermal conductivity (approximately 1 / 3 that of 45# steel) of the austenite phase in its microstructure, the cutting process exhibits a chip morphology and machining behavior that are drastically different from those of high-carbon steel.
[0003] Specifically, stainless steel undergoes intense plastic deformation in the cutting zone, resulting in a sharp increase in dislocation density and a significant work hardening effect, increasing its hardness by 1.5-2 times compared to the original matrix. Simultaneously, the material's high ductility allows the chips to withstand greater shear slip deformation before fracture, forming continuous, long, filamentous chips (long curls). These long curls have the following detrimental characteristics: First, they maintain toughness while increasing hardness; due to work hardening, the chips themselves are hard and not easily break naturally under fluctuating cutting forces. Second, they have high chemical affinity; under high temperature and pressure, the chips and the tool rake face are prone to cold welding, resulting in a severe tendency to stick to the tool. Third, there is a tangling and accumulation effect; unbroken long curls entwine around the tool, forming "chip nodules," which accumulate on the tool surface and periodically detach and regenerate.
[0004] The aforementioned chip control failures can trigger a series of machining defects: At the machining level, the periodic shedding of the built-up edge leads to fluctuations in cutting force, reducing dimensional accuracy. Simultaneously, the entangled chip edge hinders the entry of cutting fluid into the tool-chip interface, worsening heat dissipation. At the surface quality level, hard, long filamentous chips are flung towards the machined surface under centrifugal force, causing surface defects such as burrs and scratches, and in severe cases, forming built-up edge marks. At the tool life level, the adhered filamentous chips exacerbate the crater wear on the rake face and the boundary wear on the flank face, accelerating tool failure. Therefore, in the turning of stainless steel bars, how to achieve effective chip breaking and orderly chip removal has become a critical technical problem that urgently needs to be solved. Summary of the Invention
[0005] The purpose of this invention is to provide a stainless steel bar cutting device that solves the problems of difficulty in effectively breaking and orderly removing chips during the turning process of stainless steel bars, resulting in long curled chips entangled around the tool to form chip nodules, hard long filament chips being thrown onto the machined surface causing scratches, and accelerated tool wear and failure.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a stainless steel bar cutting device, comprising: A chuck is mounted on the lathe spindle and is responsible for clamping the bar stock and rotating it. The turret includes a tool holder and a cutting head mounted on one side of the tool holder. A nozzle is provided on the upper side of the tool holder, and the nozzle of the nozzle is aligned with the tip of the cutting head. The tool holder is mounted on the slide module of the lathe and is responsible for driving the cutting head to cut the rotating bar. The chip-winding mechanism includes a rotating roller rotatably mounted on one side of the blade holder and located below the blade head. The surface of the rotating roller is respectively equipped with a first cutting blade and a chip-winding column. A second cutting blade is fixedly mounted on one side of the blade holder. The first cutting blade and the second cutting blade, which rotate with the rotating roller, form a shearing structure. The nozzle sprays cutting fluid, which impacts the long shavings generated by the cutting head cutting the bar. The long shavings are impacted by the cutting fluid and swing towards the rotating roller. When the rotating roller is in a rotating state, the long shavings impacted by the fluid are captured by the shavings winding column and then wrapped around the surface of the rotating roller. Then, the first and second cutting blades work together to cut the long shavings, which are then cut off and fall off on their own.
[0007] As a further description of the above technical solution: the rotating roller is rotatably supported on one side of the tool holder by mounting brackets on both sides, a crank disc is fixedly connected to one end of the rotating roller shaft, and a drive assembly is also provided on one side of the tool holder. The output end of the drive assembly is connected to the crank disc through a connecting rod.
[0008] As a further description of the above technical solution: multiple chip-winding columns are provided and are circumferentially distributed on the outer arc surface of the rotating roller, and the distance between the outer end of the rotating roller and the rotating roller shaft is lower than the distance between the cutting edge of the cutter and the rotating roller shaft.
[0009] As a further description of the above technical solution: the rotating roller has a groove on its surface, and a plurality of the chip-winding columns are assembled in the groove. The upper side of the groove is covered with a chip-removing plate, and the surface of the chip-removing plate has through holes for the chip-winding columns to pass through to the outer surface of the chip-removing plate.
[0010] As a further description of the above technical solution: a support column is fixedly connected to the lower side of the chip removal plate, and a return spring is sleeved on the surface of the support column. The upper end of the return spring is fixedly connected to the chip removal plate, and the lower end is fixedly connected to the rotating roller. The return spring pulls the chip removal plate to cover the upper side of the groove of the rotating roller.
[0011] As a further description of the above technical solution: the rotating roller has a cavity inside, and the support column is movably inserted into the cavity; A core column is movably disposed within the cavity, and the surface of the core column is provided with an inclined groove. Under normal conditions, the lower end of the support column is located inside the inclined groove.
[0012] As a further description of the above technical solution: the core column is supported in the cavity inside the rotating roller by a support plate provided at one end. The support plate is fixedly mounted on the surface of the mounting bracket on one side. A push cylinder is also provided on one side of the support plate to push the core column to move in the cavity of the rotating roller.
[0013] As a further description of the above technical solution: the lower end of the chip-winding column is connected to a mounting base via a movable connector, and the mounting base is fixedly disposed at the bottom of the groove on the surface of the rotating roller.
[0014] As a further description of the above technical solution: the lower end of the support column is provided with a spherical surface.
[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The cutting fluid sprayed from the nozzle impacts the long spun chips, causing them to swing towards the rotating roller. The chip-winding column grabs and captures the long spun chips and wraps them around the surface of the rotating roller, effectively cleaning the long spun chips around the cutter head. Cutting blade one and cutting blade two work together to form a shearing structure that cuts the long spun chips into short spun chips. The short spun chips can fall off the surface of the rotating roller on their own, avoiding excessive accumulation of chips on the rotating roller surface. This ensures that the rotating roller can continuously capture long spun chips. In addition, while cooling the cutter head, the cutting fluid drives the long spun chips to swing in a direction, achieving a synergy between cooling and chip removal functions. This prevents long spun chips from wrapping around the cutter head and worsening heat dissipation conditions, thereby improving the cutting quality of the bar surface.
[0016] 2. The chip removal plate, through the inclined groove of the support column and the core column, rises to a height under the push of the push cylinder, pushing out the chips stuck in the middle of the chip-winding column. The return spring pulls the chip removal plate back to its original position, realizing the active cleaning of residual chips in the gap of the chip-winding column, preventing the chips from accumulating for a long time and affecting the subsequent capture effect, thereby extending the continuous working time of the chip-winding mechanism. The chip-winding column is connected to the mounting base through a movable connector, and the tilt angle adapts to the rise of the chip removal plate, avoiding the chip-winding column from obstructing the chip removal plate, thus ensuring the smooth operation of the chip removal action. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of one end of the tool holder of the present invention; Figure 3 This is a schematic diagram of the chip-winding mechanism of the present invention; Figure 4 This is a schematic diagram of the disassembled structure of the chip-winding mechanism of the present invention; Figure 5 This is a schematic cross-sectional view of the chip-winding mechanism of the present invention; Figure 6 This is a schematic diagram of the core pillar structure of the present invention; Figure 7 This is a schematic diagram of the chip removal plate structure of the present invention; Figure 8 This is a schematic diagram of the chip-wrapped column structure of the present invention.
[0018] In the diagram: 10. Chuck; 20. Turret; 21. Tool holder; 22. Tool head; 23. Nozzle; 24. Nozzle; 30. Chip wrapping mechanism; 31. Rotating roller; 32. Cutting blade one; 33. Chip wrapping column; 331. Mounting base; 332. Movable connector; 34. Cutting blade two; 35. Mounting bracket; 36. Crank disc; 37. Core column; 371. Inclined groove; 372. Support plate; 373. Push cylinder; 38. Chip removal plate; 381. Support column; 382. Return spring; 383. Spherical surface; 39. Drive assembly. Detailed Implementation
[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0020] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings.
[0021] Combination Figures 1-8 A stainless steel bar cutting device, comprising: Chuck 10 is mounted on the lathe spindle. The spindle rotates and drives the chuck 10 to rotate, so that the bar held by the chuck 10 rotates around the bar's axis. The turret 20 includes a tool holder 21 and a tool head 22 mounted on one side of the tool holder 21. A nozzle 23 is provided on the upper side of the tool holder 21. The input end of the nozzle 23 is connected to an external cutting fluid supply pump. The nozzle 24 of the nozzle 23 is aligned with the tip of the tool head 22. The cutting fluid sprayed from the nozzle 24 can cool the tool head 22. The tool holder 21 is mounted on the slide module of the lathe. The slide module is controlled by CNC and drives the tool head 22 to cut the rotating bar according to a preset program in order to cut the bar into a preset appearance shape. During the cutting of the rotating bar by the cutter head 22, long filaments are generated from the tip of the cutter head 22. To prevent unbroken filaments from entangled around the cutter head 22, thus worsening the heat dissipation of the cutter head 22 and reducing the cutting quality of the bar surface, the present invention solves this problem through the following design: The chip-winding mechanism 30 includes a rotating roller 31 rotatably mounted on one side of the blade holder 21 and located below the blade head 22. The rotating roller 31 is rotatably supported on one side of the blade holder 21 by mounting brackets 35 on both sides. A first cutting blade 32 and a chip-winding column 33 are respectively mounted on the surface of the rotating roller 31. A second cutting blade 34 is fixedly mounted on one side of the blade holder 21. The first cutting blade 32 and the second cutting blade 34, which rotate with the rotating roller 31, form a shearing structure. The nozzle 24 sprays cutting fluid, which cools the cutting head 22 and simultaneously impacts the long shavings generated by the cutting head 22 cutting the bar. These shavings are then impacted by the cutting fluid and swung towards the rotating roller 31. The swaying direction of the long shavings is further defined by a preset impact direction of the cutting fluid. Subsequently, while the rotating roller 31 is rotating, the impacted and swung long shavings come into contact with the roller 31 and are captured by the shaving coil 33. The long shavings then wrap around the surface of the rotating roller 31, effectively cleaning the long shavings around the cutting head 22. Next, the first cutter 32 and the second cutter 34 work together to form a shearing structure, cutting the long shavings wrapped around the surface of the rotating roller 31 into shorter shavings. These shorter shavings can then detach from the surface of the rotating roller 31, preventing excessive accumulation of shavings on the surface and ensuring effective capture of the remaining long shavings.
[0022] Combination Figures 2-3 One end of the rotating roller 31 shaft is fixedly connected to a crank disc 36, and a drive assembly 39 is also provided on one side of the tool holder 21. The drive assembly 39 is preferably a motor or an electric cylinder. When the drive assembly 39 is a motor, the output end of the drive assembly 39 is connected to the crank disk 36 through an eccentrically connected connecting rod, so that the motor drives the rotating roller 31 to rotate; when the drive assembly 39 is an electric push cylinder, the electric push cylinder is connected to the crank disk 36 through a connecting rod hinged at the output end, so that the electric push cylinder drives the rotating roller 31 to rotate.
[0023] Combination Figures 3-4 Multiple chip-winding columns 33 are provided and are circumferentially distributed on the outer arc surface of the rotating roller 31. The distance between the outer end of the rotating roller 31 and the axis of the rotating roller 31 is lower than the distance between the cutting edge of the first cutter 32 and the axis of the rotating roller 31. This avoids a collision between the chip-winding columns 33 and the second cutter 34 during the rotation of the rotating roller 31.
[0024] Combination Figures 5-8 The rotating roller 31 has a groove on its surface, and a plurality of chip-winding columns 33 are assembled in the groove. The upper side of the groove is covered with a chip-removing plate 38, and the surface of the chip-removing plate 38 has through holes for the chip-winding columns 33 to pass through to the outer surface of the chip-removing plate 38. A support column 381 is fixedly connected to the lower side of the cleaning plate 38. A return spring 382 is sleeved on the surface of the support column 381. The upper end of the return spring 382 is fixedly connected to the cleaning plate 38, and the lower end is fixedly connected to the rotating roller 31. The return spring 382 pulls the cleaning plate 38 to cover the upper side of the groove of the rotating roller 31. The rotating roller 31 has a cavity inside, and the support column 381 is movably inserted into the cavity; A core column 37 is movably disposed inside the cavity. The surface of the core column 37 is provided with an inclined groove 371. Under normal conditions, the lower end of the support column 381 is located inside the inclined groove 371. The core column 37 is supported in the cavity inside the rotating roller 31 by a support plate 372 provided at one end. The support plate 372 is fixedly mounted on the surface of the mounting bracket 35 on one side. A push cylinder 373 is also provided on one side of the support plate 372 to push the core column 37 to move in the cavity of the rotating roller 31. Specifically, since long shavings are irregularly wavy and elastic, after being cut by the first cutter 32 and the second cutter 34, some of them will still be stuck in the shavings column 33 and are not easy to fall off. After a long period of accumulation, they will still affect the effect of the rotating roller 31 in capturing long shavings. To this end, through the design of the shavings cleaning plate 38, when the push cylinder 373 pushes the core column 37 to move along the length direction, the inclined surface of the inclined groove 371 will push the support column 381 upward, causing the shavings cleaning plate 38 to rise on the outer surface of the rotating roller 31. This can push out the shavings stuck in the middle of multiple shavings columns 33 and achieve cleaning. Then the core column 37 returns to its original position, and the shavings cleaning plate 38 also returns to its initial position under the pull of the return spring 382, so that the shavings column 33 can continue to grab and capture long shavings.
[0025] It should be noted that the height to which the chip removal plate 38 rises when pushed should also be within the rotation radius of the cutting edge of the cutting blade 32.
[0026] Furthermore, since the chip-winding columns 33 are circumferentially distributed on the surface of the rotating roller 31 and their pointing directions are at an angle, when the chip-removing plate 38 rises, the chip-winding columns 33 will obstruct the chip-removing plate 38. Therefore, the lower end of the chip-winding column 33 is also connected to the mounting base 331 through the movable connector 332. The mounting base 331 is fixedly set at the bottom of the groove on the surface of the rotating roller 31. The movable connector 332 is preferably a coil spring or a soft rubber sleeve, so that the chip-winding column 33 can rotate freely within a preset angle at the upper end of the mounting base 331. Thus, when the chip-removing plate 38 rises, the chip-winding column 33 can adaptively tilt at an angle so as to adaptively slide within the holes on the surface of the chip-removing plate 38.
[0027] Furthermore, the lower end of the support column 381 is provided with a spherical surface 383. The spherical surface 383 makes the inclined groove 371 push the support column 381 more smoothly.
[0028] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A stainless steel bar cutting device, characterized in that, include: Chuck (10) is mounted on the lathe spindle and is responsible for clamping the bar and rotating it. The turret (20) includes a tool holder (21) and a cutting head (22) mounted on one side of the tool holder (21). A nozzle (23) is provided on the upper side of the tool holder (21). The nozzle (24) of the nozzle (23) is aligned with the tip of the cutting head (22). The tool holder (21) is mounted on the slide module of the lathe and is responsible for driving the cutting head (22) to cut the rotating bar. The chip wrapping mechanism (30) includes a rotating roller (31) rotatably mounted on one side of the blade holder (21) and located below the blade head (22). The rotating roller (31) is respectively equipped with a first cutter (32) and a chip wrapping column (33). A second cutter (34) is fixedly mounted on one side of the blade holder (21). The first cutter (32) and the second cutter (34) rotating with the rotating roller (31) form a shearing structure. The nozzle (24) sprays out cutting fluid, which impacts the long shavings generated by the cutting head (22) cutting the bar. The long shavings are impacted by the cutting fluid and swing towards the rotating roller (31). When the rotating roller (31) is rotating, the long shavings that are impacted and swing are captured by the shaving column (33) and then wrapped around the surface of the rotating roller (31). Then, the first cutter (32) and the second cutter (34) work together to cut the long shavings, so that the long shavings are cut off and fall off by themselves.
2. The stainless steel bar cutting device according to claim 1, characterized in that: The rotating roller (31) is rotatably supported on one side of the tool holder (21) by the mounting brackets (35) on both sides. One end of the rotating roller (31) shaft is fixedly connected to a crank disc (36). A drive assembly (39) is also provided on one side of the tool holder (21). The output end of the drive assembly (39) is connected to the crank disc (36) through a connecting rod.
3. The stainless steel bar cutting device according to claim 1, characterized in that: Multiple chip-winding columns (33) are provided and are circumferentially distributed on the outer arc surface of the rotating roller (31). The distance between the outer end of the rotating roller (31) and the core of the rotating roller (31) is lower than the distance between the cutting edge of the first cutter (32) and the core of the rotating roller (31).
4. The stainless steel bar cutting device according to claim 2, characterized in that: The rotating roller (31) has a groove on its surface, and a plurality of chip-winding columns (33) are assembled in the groove. The upper side of the groove is covered with a chip-removing plate (38), and the surface of the chip-removing plate (38) has through holes for the chip-winding columns (33) to pass through to the outer surface of the chip-removing plate (38).
5. A stainless steel bar cutting device according to claim 4, characterized in that: A support column (381) is fixedly connected to the lower side of the cleaning plate (38). A return spring (382) is sleeved on the surface of the support column (381). The upper end of the return spring (382) is fixedly connected to the cleaning plate (38), and the lower end is fixedly connected to the rotating roller (31). The return spring (382) pulls the cleaning plate (38) to cover the upper side of the groove of the rotating roller (31).
6. The stainless steel bar cutting device according to claim 5, characterized in that: The rotating roller (31) has a cavity inside, and the support column (381) is movably inserted into the cavity; A core column (37) is movably disposed inside the cavity. The surface of the core column (37) is provided with an inclined groove (371). Under normal conditions, the lower end of the support column (381) is located inside the inclined groove (371).
7. A stainless steel bar cutting device according to claim 6, characterized in that: The core column (37) is supported in the cavity inside the rotating roller (31) by a support plate (372) provided at one end. The support plate (372) is fixedly mounted on the surface of the mounting bracket (35) on one side. A push cylinder (373) is also provided on one side of the support plate (372) to push the core column (37) to move in the cavity of the rotating roller (31).
8. A stainless steel bar cutting device according to claim 7, characterized in that: The lower end of the chip-winding column (33) is connected to the mounting base (331) via a movable connector (332), and the mounting base (331) is fixedly set at the bottom of the groove on the surface of the rotating roller (31).
9. A stainless steel bar cutting device according to claim 7, characterized in that: The lower end of the support column (381) is provided with a spherical surface (383).