Automatic feeding and burr-free cutting mechanism for titanium alloy bar

Abstract

The utility model discloses titanium alloy bar automatic feeding no burr cutting mechanism belongs to titanium alloy bar processing technical field. Including workstation, be provided with feeding mechanism on the workstation, be provided with cutting mechanism on feeding mechanism one side top, and feeding mechanism includes conveyer belt and two conveying shafts, and one end of one conveying shaft is connected with motor, and conveying shaft and conveyer belt both ends inner wall meshed connection, and the middle part of conveyer belt is provided with the supporting plate, and cutting mechanism includes laser generator, focus cutting head, inert gas protection device and water cooling system, the utility model discloses cutting mechanism adopts laser cutting, and cooperates the focus diameter of <=50um, realizes " cold processing " mechanism, and need not secondary deburring processing, satisfies the strict requirement of medical implant, aviation precision spare etc. to the smoothness and microstructure, and feeding mechanism is prevented by meshing transmission and the design of supporting plate droop, guarantees the horizontal conveyance of bar, and combines the bidirectional positioning of stopper and limiting component, and ensures that cutting position accuracy is stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of titanium alloy bar processing technology, and more specifically, to an automatic feeding and burr-free cutting mechanism for titanium alloy bars. Background Technology

[0002] In aerospace, medical devices, and high-end equipment manufacturing, titanium alloys, with their high strength, low density, excellent corrosion resistance, and biocompatibility, have become the core raw material for critical structural components (such as engine blades, orthopedic implants, and precision drive shafts). Among these, titanium alloy bars are one of the most widely used titanium alloy profiles due to their ease of subsequent cutting and forging. As these fields continue to demand higher precision, production efficiency, and product consistency, the "precision feeding-burr-free cutting" process for titanium alloy bars has become a core bottleneck affecting the overall production chain efficiency and product quality. Existing processing technologies still face several problems that urgently need to be addressed.

[0003] Currently, the feeding methods for titanium alloy bars are mainly divided into "manual feeding" and "semi-automatic feeding", both of which have obvious defects and are difficult to match the requirements of high-precision cutting. In view of this, we propose an automatic feeding and burr-free cutting mechanism for titanium alloy bars. Utility Model Content

[0004] The purpose of this invention is to provide an automatic feeding and burr-free cutting mechanism for titanium alloy bars, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: The automatic feeding and burr-free cutting mechanism for titanium alloy bars includes a worktable, a feeding mechanism on the worktable, a cutting mechanism above one side of the feeding mechanism, stops on both sides of the feeding mechanism, and a limit component between the two stops. The feeding mechanism includes a conveyor belt and two conveyor shafts. One end of one conveyor shaft is connected to a motor. The conveyor shaft is meshed with the inner walls of both ends of the conveyor belt. A support plate is installed through the middle of the conveyor belt. The inner wall of the conveyor belt slides in contact with the surface of the support plate. The cutting mechanism includes a laser generator, a focused cutting head, an inert gas protection device, and a water cooling system. The laser generator is an ultraviolet femtosecond laser or a high-power fiber laser. The laser focal diameter of the focused cutting head is ≤50μm. The inert gas protection device sprays protective gas into the cutting area through an annular nozzle.

[0006] Preferably, the limiting component includes a mounting frame installed between two stops, with lifting mechanisms on both sides of the mounting frame. The lifting mechanisms are used to drive the mounting frame to move vertically, and multiple pressure blocks are arranged linearly and at equal intervals on the mounting frame. The pressure blocks have an arc structure.

[0007] Preferably, a sliding sleeve is provided at the upper end of the pressure block, the sliding sleeve is slidably engaged with the mounting bracket, and an adjusting bolt is provided through the sliding sleeve, the end of the adjusting bolt being in frictional contact with the mounting bracket.

[0008] Preferably, a protective cover is fitted around the cutting mechanism, and an inlet and an outlet are respectively opened on both sides of the protective cover.

[0009] Preferably, guide plates are provided on the inner sides of both the inlet and outlet, and mounting plates are provided at both ends of the guide plates. The ends of the guide plates are rotatably connected to the mounting plates via a rotating shaft.

[0010] Preferably, the workbench has a through groove located below the cutting mechanism, and a waste collection box is installed inside the workbench, with the inlet of the waste collection box connected to the through groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) The cutting mechanism of this utility model adopts laser cutting and with a focusing diameter of ≤50μm, realizes the "cold processing" mechanism, the heat-affected zone is <5μm, the burr height of the cut is <2μm, and no secondary deburring treatment is required, which meets the stringent requirements of medical implants, aerospace precision parts and other materials for surface finish and microstructure; at the same time, the feeding mechanism ensures the horizontal conveying of the bar through meshing transmission and anti-sagging design of the support plate, and combined with the bidirectional positioning of the stop block and the limiting component, ensures the stable and reliable cutting position accuracy.

[0012] (2) The feeding mechanism of this utility model achieves automatic feeding by driving the conveyor shaft and the conveyor belt through a motor. The entire process of automatic feeding and cutting is carried out in coordination, eliminating the need for manual positioning and secondary deburring, and greatly shortening the production cycle. The lifting mechanism of the limit component and the arc pressure block can adaptively press according to the diameter of the bar. The cooperation between the sliding sleeve and the adjusting bolt further enables flexible adjustment of the lateral spacing of the pressure block to meet diverse processing needs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the protective cover of this utility model; Figure 3 This is a partial structural diagram of the limiting component of this utility model.

[0014] The following are the labels in the diagram: 1. Workbench; 101. Through slot; 2. Feeding mechanism; 3. Cutting mechanism; 301. Laser generator; 302. Focusing cutting head; 4. Stop block; 5. Limiting component; 501. Mounting bracket; 502. Pressure block; 503. Sliding sleeve; 504. Adjusting bolt; 6. Protective cover; 7. Guide plate; 8. Mounting plate; 9. Waste collection box. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] Example: Please see Figure 1-3 The automatic feeding and burr-free cutting mechanism for titanium alloy bars includes a worktable 1, on which a feeding mechanism 2 is provided. The feeding mechanism 2 is used to transport the titanium alloy bars to the cutting mechanism 3 for cutting. The cutting mechanism 3 is provided above one side of the feeding mechanism 2, and the feeding mechanism 2 is provided with stops 4 on both sides. A limit component 5 is provided between the two stops 4. When cutting the bars, the titanium alloy bars are fixed by the limit component 5.

[0017] The feeding mechanism 2 includes a conveyor belt and two conveyor shafts. One end of one conveyor shaft is connected to a motor, and the conveyor shaft meshes with the inner walls of both ends of the conveyor belt. A support plate runs through the middle of the conveyor belt, and the inner wall of the conveyor belt slides in contact with the surface of the support plate. The motor drives the conveyor shaft to rotate, and the meshing transmission between the conveyor shaft and the inner wall of the conveyor belt (tooth clearance ≤ 0.1mm) achieves continuous and stable feeding of titanium alloy bars, avoiding the slippage problem of traditional friction drives. The feeding speed can be controlled by motor speed adjustment (5-50mm / s) to adapt to the cutting needs of bars of different diameters. The support plate runs through the middle of the conveyor belt and slides in contact with the inner wall, which can counteract the sagging of the conveyor belt caused by the weight of the bars (maximum sagging ≤ 0.03mm), ensuring the horizontality of the bars during feeding (horizontal deviation ≤ 0.02mm / m) and preventing cutting position deviation caused by conveyor belt deformation.

[0018] The cutting mechanism 3 includes a laser generator 301, a focusing cutting head 302, an inert gas protection device, and a water cooling system. The laser generator 301 is an ultraviolet femtosecond laser or a high-power fiber laser. The laser focal diameter of the focusing cutting head 302 is ≤50μm. The inert gas protection device sprays protective gas into the cutting area through an annular nozzle. The laser generator 301 and the focusing cutting head 302 are as follows: The ultraviolet femtosecond laser (pulse width 10-100 fs) avoids the oxidation of titanium alloy through "cold processing," with a heat-affected zone of <5μm; the high-power fiber laser (1064nm wavelength) can efficiently cut medium and thick bars, and with a focal diameter of ≤50μm, the burr height of the cut is <2μm, requiring no secondary processing, meeting the surface finish requirements of medical implants and aerospace precision parts; the inert gas protection device: high-purity argon gas (purity ≥99.99%) sprayed by the annular nozzle forms a gas curtain in the cutting area, isolating air to prevent high-temperature oxidation of titanium alloy (oxide layer thickness <1μm), while also assisting in blowing away molten slag to prevent slag adhesion and burr formation; the water cooling system: provides real-time cooling for the laser generator 301 and the focusing cutting head 302 (coolant flow rate 2-5L / min), controls the operating temperature of the components to ≤50℃, ensures the stability of laser power (power fluctuation ≤±1%), and avoids a decrease in cutting accuracy due to overheating.

[0019] In this application, the limiting component 5 includes a mounting frame 501 installed between two stops 4. Lifting mechanisms are provided on both sides of the mounting frame 501, which drive the mounting frame 501 to move vertically. Multiple pressure blocks 502 are linearly and equally spaced on the mounting frame 501, and each pressure block 502 has a circular arc structure. The lifting mechanism (such as an electric push rod) can drive the mounting frame 501 to move vertically (adjustment accuracy ±0.01mm), adapting to titanium alloy bars of different specifications with diameters of 3-50mm, ensuring the fit between the pressure block 502 and the surface of the bar. The circular arc pressure block 502: its circular arc structure matches the outer circle of the bar (fitting gap ≤0.05mm), which can press the bar tightly during cutting (pressing force adjustable from 5-30N), suppressing vertical vibration of the bar caused by laser impact (vibration amount ≤0.005mm), and avoiding wavy defects in the cut caused by vibration.

[0020] In this application, a sliding sleeve 503 is provided at the upper end of the pressure block 502. The sliding sleeve 503 is slidably engaged with the mounting frame 501. An adjusting bolt 504 is provided through the sliding sleeve 503, and the end of the adjusting bolt 504 is in frictional contact with the mounting frame 501. The sliding sleeve 503 slides along the mounting frame 501 to adjust the lateral spacing of the pressure block 502, adapting to the clamping requirements of bars of different diameters; the adjusting bolt 504 locks the position of the sliding sleeve 503 through friction, ensuring that the pressure block 502 does not shift during high-speed feeding.

[0021] In this application, a protective cover 6 is fitted around the cutting mechanism 3, with an inlet and an outlet on each side of the protective cover 6. The protective cover 6 is used to isolate the laser cutting area, prevent ultraviolet / infrared laser leakage (laser leakage ≤0.1mW / cm²), and avoid damage to the operator's eyes and skin; at the same time, it prevents external airflow from interfering with the laser focusing path (focusing deviation ≤2μm).

[0022] In one possible embodiment, a guide plate 7 is provided on the inner side of both the feed port and the discharge port. Mounting plates 8 are provided at both ends of the guide plate 7. The ends of the guide plate 7 are rotatably connected to the mounting plates 8 via a rotating shaft. When the bar enters the feed port, it will push the guide plate 7, causing the guide plate 7 to tilt and rotate inward. This will not affect the feeding of the bar. The guide plate 7 can block the airflow at the feed port or the discharge port to prevent external airflow from interfering with the laser focusing path. At the same time, it can block the coolant to prevent the coolant from flowing out of the discharge port or the feed port.

[0023] In this application, the workbench 1 is located below the cutting mechanism 3 and has a through groove 101. A waste collection box 9 is installed inside the workbench 1, and the inlet of the waste collection box 9 is connected to the through groove 101. The through groove 101 is aligned with the bottom of the cutting station, allowing titanium alloy chips, slag, or coolant generated during cutting to fall directly into the waste collection box 9, avoiding the accumulation of waste on the feeding path (accumulation height ≤ 0.02mm), preventing scratches on the surface of the bar stock or interference with feeding accuracy; the waste collection box 9 enables centralized collection of chips and coolant, facilitating subsequent processing.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A titanium alloy bar automatic feeding and burr-free cutting mechanism, comprising a workbench (1), characterized in that: The workbench (1) is provided with a feeding mechanism (2), a cutting mechanism (3) is provided above one side of the feeding mechanism (2), and a stop block (4) is provided on both sides of the feeding mechanism (2). A limit component (5) is provided between the two stop blocks (4). The feeding mechanism (2) includes a conveyor belt and two conveyor shafts. One end of one conveyor shaft is connected to a motor. The conveyor shaft is meshed with the inner walls of both ends of the conveyor belt. A support plate is provided through the middle of the conveyor belt. The inner wall of the conveyor belt is in sliding contact with the surface of the support plate. The cutting mechanism (3) includes a laser generator (301), a focusing cutting head (302), an inert gas protection device and a water cooling system. The laser generator (301) is an ultraviolet femtosecond laser or a high-power fiber laser. The laser focal diameter of the focusing cutting head (302) is ≤50μm. The inert gas protection device sprays protective gas into the cutting area through an annular nozzle.

2. The titanium alloy bar automatic feeding no-burr cutting mechanism according to claim 1, characterized in that: The limiting component (5) includes a mounting frame (501) installed between two stops (4). The mounting frame (501) is provided with lifting mechanisms on both sides. The lifting mechanisms are used to drive the mounting frame (501) to move vertically. Multiple pressure blocks (502) are arranged linearly and equally spaced on the mounting frame (501). The pressure blocks (502) are arc structures.

3. The titanium alloy bar automatic feeding no-burr cutting mechanism according to claim 2, characterized in that: The upper end of the pressure block (502) is provided with a sliding sleeve (503), the sliding sleeve (503) is slidably engaged with the mounting bracket (501), and an adjusting bolt (504) is provided through the sliding sleeve (503), the end of the adjusting bolt (504) is in frictional contact with the mounting bracket (501).

4. The titanium alloy bar automatic feed no-burr cutting mechanism of claim 1, wherein: The cutting mechanism (3) is fitted with a protective cover (6) on the outside, and the protective cover (6) has an inlet and an outlet on both sides respectively.

5. The titanium alloy bar automatic feed no-burr cutting mechanism according to claim 4, characterized in that: The inlet and outlet are both provided with guide plates (7), and the guide plates (7) are provided with mounting plates (8) at both ends. The ends of the guide plates (7) are rotatably connected to the mounting plates (8) through a rotating shaft.

6. The titanium alloy bar automatic feed no-burr cutting mechanism of claim 4, wherein: The workbench (1) is located below the cutting mechanism (3) and has a through groove (101). A waste collection box (9) is provided inside the workbench (1), and the inlet of the waste collection box (9) is connected to the through groove (101).

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