Integrated deep cryogenic treatment equipment for high speed steel circular saw blade

Abstract

The utility model relates to metal processing technical field especially is a kind of integrated cryogenic treatment equipment of high speed steel circular saw blade, including mounting bracket, the top of mounting bracket is fixed with ladder workbench, the middle part of ladder workbench upper surface is slidably matched with mobile elastic clamping mechanism, the side of ladder workbench upper surface is provided with mounting groove, the inboard of mounting groove is installed with liquid nitrogen injection mechanism, the other side of ladder workbench upper surface is fixed with resistance heating mechanism;Mobile elastic clamping mechanism includes mobile seat, the top of mobile seat is installed with telescopic link, the telescopic end of telescopic link is hinged with hinged frame, the top of hinged frame is fixed with clamping disc subassembly;Clamping disc subassembly includes support disc, the bottom of support disc is fixed with connecting seat, in the utility model, integrated layout integration cryogenic and tempering, effectively solve the problem that artificial transfer leads to cryogenic effect damage, saw blade performance is not good, improves saw blade processing quality.

Description

Technical Field

[0001] This utility model relates to the field of metal processing technology, specifically to an integrated cryogenic treatment device for high-speed steel circular saw blades. Background Technology

[0002] High-speed steel circular saw blades are circular cutting tools made of high-speed steel, mainly used for cutting and processing metal materials. They are suitable for various metal cutting scenarios and can cut common metal materials such as carbon steel, alloy steel, stainless steel, copper, and aluminum. They are widely used in machinery manufacturing, hardware processing, and automotive repair. Their working principle is that the saw blade rotates at high speed and uses the serrations on the edge to cut the workpiece. The high-speed steel material gives it high hardness and wear resistance, and it can withstand the high temperature and friction during cutting. Compared with ordinary saw blades, it has higher cutting efficiency and longer service life, and is especially suitable for medium and low intensity continuous cutting operations. In the field of metal processing, the cutting performance and service life of high-speed steel circular saw blades largely depend on the heat treatment process. Cryogenic treatment, as a key step, can promote the transformation of residual austenite to martensite and refine the grains by placing the saw blade in a low-temperature environment below -80℃, thereby improving its hardness and wear resistance. In the processing of high-speed steel circular saw blades, the existing cryogenic treatment technology has obvious defects. Currently, the two key processes of cryogenic treatment and tempering often need to be carried out on two separate machines. This means that during the process conversion, the saw blade must be manually transferred from the cryogenic equipment to the tempering equipment. During this manual transfer, the temperature of the saw blade will rise rapidly by more than 30°C. This directly leads to the serious destruction of the effect achieved by the cryogenic treatment, making it impossible to stably achieve the goal of full transformation of residual austenite to martensite and grain refinement, thus affecting the final hardness and wear resistance of the saw blade. Therefore, an integrated cryogenic treatment device for high-speed steel circular saw blades is proposed to address the above problems. Utility Model Content

[0003] The purpose of this invention is to provide an integrated cryogenic treatment device for high-speed steel circular saw blades to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: An integrated cryogenic treatment device for high-speed steel circular saw blades includes a mounting frame. A stepped worktable is fixed to the top of the mounting frame. A movable elastic clamping mechanism is slidably fitted onto the middle of the upper surface of the stepped worktable. A mounting groove is formed on one side of the upper surface of the stepped worktable, and a liquid nitrogen spraying mechanism is installed inside the mounting groove. A resistance heating mechanism is fixed to the other side of the upper surface of the stepped worktable. The movable elastic clamping mechanism includes a movable base, a telescopic rod is mounted on the top of the movable base, and a hinge frame is hinged to the telescopic end of the telescopic rod. A clamping plate assembly is fixed to the top of the hinge frame. The clamping plate assembly includes a support plate, a connecting seat is fixed to the bottom of the support plate, and guide wheels are rotatably connected to both ends of the connecting seat via a fixed connecting shaft. A chuck base is fixed to the top of the support plate, and three guide rails arranged in a circular array are fixed to the upper surface of the chuck base. Elastic clamps are slidably connected to the outer sides of the guide rails.

[0005] As a further optimization of this utility model, the rear end of the elastic clamp is fitted with a return spring, and one end of the return spring is fixedly connected to the rear end of the guide rail.

[0006] As a further optimization of this utility model, the bottom of the mounting bracket is equipped with a linear drive motor via a fixed bracket, and the moving end of the linear drive motor is fixedly connected to the moving base by bolts.

[0007] As a further optimization of this utility model, the center of the stepped workbench is inclined, a friction rod symmetrically arranged on both sides is fixed at the center of the stepped workbench, one end of the friction rod is inclined, and a movable groove for adapting the hinge frame is provided in the middle of the upper surface of the stepped workbench.

[0008] As a further optimization of this utility model, the liquid nitrogen injection mechanism includes a waste material collection box, which is fixedly installed inside the mounting groove. A spray fixing frame is fixed inside the waste material collection box, extending above the mounting frame. A liquid nitrogen nozzle is fixed at the center of the top of the spray fixing frame.

[0009] As a further optimization of this utility model, the two sides of the top of the movable seat are inclined, the telescopic rod is fixedly installed at the center of the top of the movable seat, and the extension stroke of the telescopic rod is adapted to the inclination height difference of the stepped worktable.

[0010] As a further optimization of this utility model, the two connecting seats are respectively fixedly installed on both sides of the lower surface of the support plate, there is a gap between the support plate and the stepped worktable, and the center of the support plate and the center of the chuck base are located on the same central axis.

[0011] Compared with the prior art, the beneficial effects of this utility model are: In this invention, a movable elastic clamping mechanism is set up to flexibly clamp and avoid stress, a linear drive motor smoothly transports the saw blade, a stepped worktable and a friction rod work together to accelerate the evaporation of liquid nitrogen, and an integrated layout integrates cryogenics and tempering, effectively solving the problems of damage to the cryogenic effect and poor saw blade performance caused by manual transfer, and improving the quality of saw blade processing. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a side view of the overall structure of this utility model; Figure 3 This is one of the structural schematic diagrams of the movable elastic clamping mechanism of this utility model; Figure 4 This is the second structural schematic diagram of the movable elastic clamping mechanism of this utility model; Figure 5 This is one of the schematic diagrams of the movable elastic clamping mechanism of this utility model; Figure 6 This is the second schematic diagram of the movable elastic clamping mechanism of this utility model.

[0013] In the diagram: 1. Mounting bracket; 2. Stepped worktable; 21. Friction rod; 22. Movable groove; 3. Movable elastic clamping mechanism; 31. Movable seat; 32. Telescopic rod; 33. Hinge frame; 34. Clamping disc assembly; 341. Support disc; 342. Connecting seat; 343. Guide wheel; 344. Chuck base; 345. Guide rail; 346. Elastic clamp; 347. Return spring; 4. Linear drive motor; 5. Mounting slot; 6. Liquid nitrogen injection mechanism; 61. Residual material collection box; 62. Injection fixing frame; 63. Liquid nitrogen nozzle; 7. Resistance heating mechanism. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0016] Please see Figures 1-6 This utility model provides a technical solution: An integrated cryogenic treatment device for high-speed steel circular saw blades includes a mounting frame 1, a stepped worktable 2 fixed to the top of the mounting frame 1, a movable elastic clamping mechanism 3 slidably fitted in the middle of the upper surface of the stepped worktable 2, a mounting groove 5 formed on one side of the upper surface of the stepped worktable 2, a liquid nitrogen spraying mechanism 6 installed inside the mounting groove 5, and a resistance heating mechanism 7 fixed to the other side of the upper surface of the stepped worktable 2; the movable elastic clamping mechanism 3 includes a movable base 31, a telescopic rod 32 installed at the top of the movable base 31, extending... The telescopic end of the telescopic rod 32 is hinged to a hinge frame 33, and a clamping plate assembly 34 is fixed to the top of the hinge frame 33. The clamping plate assembly 34 includes a support plate 341, a connecting seat 342 is fixed to the bottom of the support plate 341, and guide wheels 343 are rotatably connected to both ends of the connecting seat 342 through a fixed connecting shaft. A chuck base 344 is fixed to the top of the support plate 341, and three guide rails 345 arranged in a circular array are fixed to the upper surface of the chuck base 344. An elastic clamp 346 is slidably connected to the outer side of the guide rails 345.

[0017] Specifically, a solenoid valve is installed on the outside of the liquid nitrogen nozzle 63, the spray range of the liquid nitrogen nozzle 63 covers the upper surface of the chuck base 344, and the top opening size of the residual material collection box 61 is larger than the spray range of the liquid nitrogen nozzle 63, with a depth ≥50mm. As a further implementation of this solution, a return spring 347 is sleeved on the rear end of the elastic clamp 346. One end of the return spring 347 is fixedly connected to the rear end of the guide rail 345. The elastic clamp 346 adapts to the deep cryogenic contraction and tempering expansion of the saw blade through elastic deformation, avoiding stress generated by rigid clamping, while providing continuous preload to ensure that the saw blade does not loosen during processing and improve clamping stability. As a further implementation of this solution, a linear drive motor 4 is mounted on the bottom of the mounting bracket 1 via a fixed bracket, and the moving end of the linear drive motor 4 is fixedly connected to the moving base 31 by bolts. To further explain, the linear drive motor 4 can precisely drive the moving seat 31 to slide along the stepped worktable 2, so as to realize the smooth transfer of the saw blade in the cryogenic zone and the tempering zone. As a further implementation of this solution, the center of the stepped workbench 2 is inclined, and a friction rod 21 symmetrically arranged is fixed at the center of the stepped workbench 2. One end of the friction rod 21 is inclined, and a movable groove 22 for adapting to the hinge frame 33 is opened in the middle of the upper surface of the stepped workbench 2. The movable groove 22 is used to adapt to the movement of the hinge frame 33. The friction rod 21 can improve the anti-slip effect of the guide wheel 343. At the same time, the friction between the guide wheel 343 and the friction rod 21 generates high-frequency vibration, which accelerates the evaporation and desorption of residual liquid nitrogen on the surface of the saw blade. As a further implementation of this solution, the liquid nitrogen injection mechanism 6 includes a waste material collection box 61, which is fixedly installed inside the mounting groove 5. A spray fixing frame 62 is fixed inside the waste material collection box 61 and extends above the mounting frame 1. A liquid nitrogen nozzle 63 is fixed at the middle of the top of the spray fixing frame 62. The waste material collection box 61 recovers excess liquid nitrogen to reduce waste, and the spray fixing frame 62 stabilizes the liquid nitrogen nozzle 63 to ensure that the spray range accurately covers the chuck base 344 and achieves uniform deep cooling of the saw blade. As a further implementation of this solution, the two sides of the top of the movable seat 31 are inclined, and the telescopic rod 32 is fixedly set at the center of the top of the movable seat 31. The extension stroke of the telescopic rod 32 is adapted to the height difference of the inclination of the stepped workbench 2. As a further implementation of this solution, two connecting seats 342 are fixedly installed on both sides of the lower surface of the support plate 341 and are parallel to each other. There is a gap between the support plate 341 and the stepped worktable 2. The center of the support plate 341 and the center of the chuck base 344 are located on the same central axis.

[0018] Workflow: The operator places the high-speed steel circular saw blade to be processed on the chuck base 344 of the movable elastic clamping mechanism 3. At this time, the three elastic clamps 346 arranged in a circular array slide radially along the guide rail 345 and fit against the edge of the saw blade under the pre-tightening force of the return spring 347, realizing flexible clamping, which not only ensures the stability of the saw blade, but also reserves radial movement space for subsequent deep cryogenic shrinkage. The support plate 341 is connected to the guide wheel 343 through the connecting seat 342. The guide wheel 343 is initially in contact with the upper surface of the stepped workbench 2, the telescopic rod 32 is in the initial retracted state, and the hinge frame 33 is embedded in the movable groove 22 to ensure that the clamping plate assembly 34 is horizontal. When the linear drive motor 4 starts, its moving end drives the moving seat 31 to slide along the stepped workbench 2 via bolts, accurately conveying the clamped saw blade to the liquid nitrogen spraying mechanism 6 directly below the liquid nitrogen nozzle 63 with a distance of 50-80mm between the liquid nitrogen nozzle 63 and the saw blade. The inclined structure on both sides of the moving seat 31 can shield the linear drive motor and avoid the influence of low temperature. The liquid nitrogen nozzle 63 is opened by a solenoid valve to spray liquid nitrogen onto the surface of the saw blade. The system cools the saw blade temperature from room temperature to -80°C at a rate of 5°C / min according to a preset program. During this stage, the liquid nitrogen evenly covers the upper surface of the saw blade and the spray range is adapted to the chuck base 344. Excess liquid nitrogen drips into the waste material collection box 61 below for recycling. The saw blade shrinks radially due to the low temperature. The elastic clamp 346 slides synchronously along the guide rail 345. The reset spring 347 adaptively adjusts the clamping force to avoid stress concentration caused by rigid constraints. After reaching -80°C, the temperature is maintained for 30 minutes. The temperature difference stress between the surface and core of the saw blade is released by slow cooling. The liquid nitrogen spray volume is adjusted, and the temperature continues to drop to the boiling point of liquid nitrogen at a rate of 10°C / min. The temperature is maintained for 2-4 hours. The continuous low temperature promotes the complete transformation of the residual austenite inside the saw blade into martensite. After cryogenic treatment, the linear drive motor 4 drives the moving seat 31 to move towards the inclined area in the middle of the stepped workbench 2. At this time, the guide wheel 343 contacts the symmetrically distributed friction rods 21 at an inclination angle of 10°-20° and gradually climbs along the inclined rail. The telescopic rod 32 extends synchronously with the climbing height. With the rotation of the hinge frame 33 in the movable slot 22, the friction between the guide wheel 343 and the friction rods 21 generates high-frequency vibration, which accelerates the evaporation and desorption of residual liquid nitrogen on the surface of the saw blade. This avoids temperature fluctuations caused by the boiling of liquid nitrogen after entering the heating zone. The moving seat 31 continues to move until the saw blade is completely removed from the cryogenic zone and reaches the resistance heating mechanism 7 on the other side of the stepped workbench 2. At this time, the guide wheel 343 is removed from the friction rods 21, the saw blade is restored to a horizontal position, and the resistance heating mechanism 7 is started. The saw blade is gradually heated from -196°C to 150-200°C according to the program, with a heating rate of 5°C / min, and kept warm for 1-2 hours. When the saw blade heats up and expands, the elastic clamp 346 absorbs the expansion through the elastic deformation of the return spring 347, thus avoiding secondary stress. After tempering, the linear drive motor 4 drives the movable elastic clamping mechanism 3 back to the initial position. Under manual operation, the elastic clamp 346 slides in the opposite direction along the guide rail 345 to release the saw blade and complete the entire cryogenic and tempering integrated processing process.

[0019] 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. An integrated cryogenic treatment device for high-speed steel circular saw blades, comprising a mounting frame (1), characterized in that: The top of the mounting bracket (1) is fixed with a stepped worktable (2), and a movable elastic clamping mechanism (3) is slidably fitted in the middle of the upper surface of the stepped worktable (2). An installation groove (5) is opened on one side of the upper surface of the stepped worktable (2), and a liquid nitrogen injection mechanism (6) is installed inside the installation groove (5). A resistance heating mechanism (7) is fixed on the other side of the upper surface of the stepped worktable (2). The movable elastic clamping mechanism (3) includes a movable seat (31), a telescopic rod (32) is installed at the top of the movable seat (31), a hinge frame (33) is hinged to the telescopic end of the telescopic rod (32), and a clamping disk assembly (34) is fixed at the top of the hinge frame (33). The clamping disk assembly (34) includes a support disk (341), a connecting seat (342) is fixed at the bottom of the support disk (341), and guide wheels (343) are rotatably connected to both ends of the connecting seat (342) through a fixed connecting shaft. A chuck base (344) is fixed at the top of the support disk (341), and three guide rails (345) arranged in a circular array are fixed on the upper surface of the chuck base (344). An elastic clamp (346) is slidably connected to the outer side of the guide rails (345).

2. The integrated cryogenic treatment equipment for high-speed steel circular saw blades according to claim 1, characterized in that: The rear end of the elastic clamp (346) is fitted with a return spring (347), one end of which is fixedly connected to the rear end of the guide rail (345).

3. The integrated cryogenic treatment equipment for high-speed steel circular saw blades according to claim 1, characterized in that: The bottom of the mounting bracket (1) is fitted with a linear drive motor (4) via a fixed bracket, and the moving end of the linear drive motor (4) is fixedly connected to the moving base (31) by bolts.

4. The integrated cryogenic treatment equipment for high-speed steel circular saw blades according to claim 1, characterized in that: The center of the stepped workbench (2) is inclined, and a friction rod (21) symmetrically arranged is fixed at the center of the stepped workbench (2). One end of the friction rod (21) is inclined, and an active groove (22) for adapting the hinge frame (33) is provided in the middle of the upper surface of the stepped workbench (2).

5. The integrated cryogenic treatment equipment for high-speed steel circular saw blades according to claim 1, characterized in that: The liquid nitrogen injection mechanism (6) includes a waste collection box (61), which is fixedly installed inside the mounting groove (5). A spray fixing frame (62) is fixed inside the waste collection box (61), which extends above the mounting frame (1). A liquid nitrogen nozzle (63) is fixed at the middle of the top of the spray fixing frame (62).

6. The integrated cryogenic treatment equipment for a high-speed steel circular saw blade according to claim 1, characterized in that: The top two sides of the movable seat (31) are inclined, and the telescopic rod (32) is fixedly installed at the center of the top of the movable seat (31). The extension stroke of the telescopic rod (32) is adapted to the height difference of the inclined platform (2).

7. The integrated cryogenic treatment equipment for high-speed steel circular saw blades according to claim 1, characterized in that: The two connecting seats (342) are respectively fixed on both sides of the lower surface of the support plate (341). There is a gap between the support plate (341) and the stepped worktable (2). The center of the support plate (341) and the center of the chuck base (344) are located on the same central axis.

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