A high-chromium steel ball surface hardening treatment device

Abstract

The utility model discloses a high chromium steel ball surface hardening treatment device relates to high chromium steel ball surface processing relevant field, for solving the problem of the steel pipe rotation along the steel pipe when the heating of prior art, and the stable movement position of rotating axle, and the uneven heating of the front and rear end point and the middle of the outer surface, lead to the problem of the inconsistent hardness of steel ball surface. A plurality of induction quenching units are arranged on the upper end of the supporting bottom plate from front to back, the induction quenching unit includes eddy current heating cylinder and cooling quenching cylinder, the upper end of the eddy current heating cylinder is fixed with the ball inlet pipe on the side away from the cooling quenching cylinder, the inside of the eddy current heating cylinder forms the feed zone along the lower end of the ball inlet pipe, the other side of the inside of the eddy current heating cylinder forms the heating zone, the inside of the cooling quenching cylinder forms the cooling zone, the heating zone and the cooling zone are fixed with the spiral piece together, and the spiral piece spirally downward along the inclined direction of the eddy current heating cylinder and the cooling quenching cylinder.

Description

Technical Field

[0001] This utility model relates to the field of surface processing of high-chromium steel balls, specifically a device for surface hardening treatment of high-chromium steel balls. Background Technology

[0002] High-chromium steel balls are the core wear-resistant media in the field of industrial grinding. Their surface hardness and wear resistance directly determine the operating efficiency and production cost of the equipment.

[0003] With the increasing demands for mill processing capacity from industries such as mining, building materials, and power, surface hardening technology for high-chromium steel balls has become a key factor in extending service life and reducing overall energy consumption. Laser hardening technology uses a CO2 laser (3-5kW) or fiber laser (1-3kW) to scan and heat the surface of the steel ball; induction hardening technology uses a high-frequency induction coil (10-50kHz) to generate eddy current heating on the surface of the steel ball, and achieves a hardened layer of 1-3mm thickness through spray cooling. For example, the Chinese authorized patent with publication number CN 210765431U (An Induction Hardening Device Based on Bearing Steel Balls) includes a power shaft, a steel pipe sleeved on the outside of the power shaft, gears fixedly connected to both ends of the power shaft, chains meshing on the outside of the gears, a heating coil above the power shaft, a water tank on the right side of the power shaft, a magnet above the water tank, a spring welded to the bottom of the magnet, an iron plate welded to the end of the spring away from the magnet, a track on the right side of the water tank, a fixing frame welded above the track, a U-shaped frame fixedly connected to the top of the fixing frame, and a moving rod fixedly connected above the magnet. This induction hardening device based on bearing steel balls, through the arrangement of the steel pipe, allows the steel balls to rotate while being heated within the heating coil, resulting in uniform heating of the steel ball surface and achieving a uniform heating effect, thus improving production quality.

[0004] Although the aforementioned prior art has the functions of heating steel balls and cooling and quenching after heating, the arrangement of the steel pipes causes the steel balls to rotate along the steel pipes during heating. The position of the rotation axis is stable, resulting in uneven heating of the front and rear ends and the middle of the outer surface, leading to inconsistent surface hardness of the steel balls. Utility Model Content

[0005] The purpose of this invention is to provide a surface hardening treatment device for high-chromium steel balls, in order to solve the problem mentioned in the background art that when the steel pipe is heated, it rotates along the steel pipe, the position of the rotation axis is stable, the heating of the front and rear ends and the middle of the outer surface are uneven, resulting in inconsistent surface hardness of the steel ball.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a surface hardening treatment device for high-chromium steel balls, comprising a supporting base plate, the supporting base plate being inclined, and multiple induction hardening units arranged from front to back on the upper end of the supporting base plate, each induction hardening unit comprising an eddy current heating cylinder and a cooling hardening cylinder, the eddy current heating cylinder and the cooling hardening cylinder being inclined along the inclination direction of the supporting base plate, a ball-filling tube being fixed on the upper end of the eddy current heating cylinder away from the cooling hardening cylinder, a feeding zone being formed inside the eddy current heating cylinder along the lower end of the ball-filling tube, a heating zone being formed on the other side inside the eddy current heating cylinder, and a cooling zone being formed inside the cooling hardening cylinder, a spiral component being fixed together in the heating zone and the cooling zone, the spiral component spiraling downward along the inclination direction of the eddy current heating cylinder and the cooling hardening cylinder.

[0007] Preferably, a high-frequency induction coil is fixed inside the inner wall of the eddy current heating cylinder in the heating zone, and the two ends of the high-frequency induction coil extend downward and are connected through conductive parts.

[0008] Preferably, the upper ends of the ball-in-the-hole tubes on the multiple induction hardening units are jointly fixed with a high-chromium steel ball distribution chamber. The lower end face of the high-chromium steel ball distribution chamber has an opening with the same diameter as the inner diameter of the ball-in-the-hole tube. The outer side of the high-chromium steel ball distribution chamber has a rectangular groove and a ball-guiding platform is fixed around the rectangular groove.

[0009] Preferably, a C-shaped bracket is fixed to the upper end of the support base plate along the outside of the area where the cooling and quenching cylinder is located. An inlet pipe is installed at the upper end of the C-shaped bracket. Multiple outlet pipes are arranged in an array at the front and rear ends of the lower end of the C-shaped bracket. Several spray holes are provided on the lower end face of the outlet pipes. The outlet pipes and the inlet pipes are connected and internally communicated through an intermediate branch pipe, which is fixed to the C-shaped bracket.

[0010] Preferably, a cooling groove is provided through the upper end of the outer surface of the cooling quenching cylinder, and the liquid outlet pipe is located at the upper end of the cooling groove.

[0011] Preferably, the lower end of the outer surface of the cooling and quenching cylinder is provided with a plurality of rectangular slots in an annular array, and the upper end of the support base plate is provided with a liquid receiving box along the lower end of the area where the cooling and quenching cylinder is located, and a drain pipe is provided on one side of the rear end face of the liquid receiving box.

[0012] Preferably, the lower end array of the eddy current heating cylinder and the cooling quenching cylinder has multiple support frames, which are installed on the upper end of the support base plate. The upper end of the support base plate is provided with a lower receiving box along the output end of the cooling quenching cylinder.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) In this utility model, the spiral component causes the high-chromium steel ball to rotate continuously during the heating and cooling process, ensuring that each surface of the ball is uniformly heated and cooled, making the surface hardness of the high-chromium steel ball more consistent and significantly enhancing its wear resistance, thereby effectively improving the quality and service life of the product.

[0015] (2) In this utility model, by using the inclined design of the supporting base plate and the spiral motion of the spiral component, the high-chromium steel ball is naturally moved in the device by gravity without the need for additional power drive. At the same time, combined with the rapid heating of the high-frequency induction coil and the spray cooling method, the processing cycle is shortened and the production efficiency is improved, which can meet the needs of large-scale industrial production. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a high-chromium steel ball surface hardening treatment device from the main perspective.

[0017] Figure 2 This is a schematic diagram of the overall structure of a high-chromium steel ball surface hardening treatment device from an upward perspective.

[0018] Figure 3 This is a front view of a surface hardening treatment device for high-chromium steel balls according to the present invention;

[0019] Figure 4 This is a schematic diagram of the induction hardening unit of a surface hardening treatment device for high-chromium steel balls according to this utility model;

[0020] Figure 5 This is a top view of a surface hardening treatment device for high-chromium steel balls according to the present invention;

[0021] Figure 6 This is a cross-sectional view at point AA of a high-chromium steel ball surface hardening treatment device according to the present invention.

[0022] In the diagram: 1. Support base plate; 2. Induction hardening unit; 3. Support frame; 4. Eddy current heating cylinder; 5. Ball inlet tube; 6. Cooling and hardening cylinder; 7. Feeding area; 8. Heating area; 9. Cooling area; 10. High-frequency induction coil; 11. Spiral component; 12. Rectangular slot; 13. High-chromium steel ball distribution chamber; 14. Ball guide platform; 15. C-shaped bracket; 16. Liquid inlet pipe; 17. Liquid outlet pipe; 18. Liquid receiving box; 19. Lower receiving box; 20. Cooling slot. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1-6 This utility model provides an embodiment of a surface hardening treatment device for high-chromium steel balls, comprising a supporting base plate 1, which is inclined to form a stable support frame for the entire device. Multiple induction hardening units 2 are arranged sequentially from front to back on the upper end of the supporting base plate 1. Each induction hardening unit 2 consists of an eddy current heating cylinder 4 and a cooling quenching cylinder 6, both inclined along the direction of inclination of the supporting base plate 1. Multiple support frames 3 are arrayed at the lower ends of the eddy current heating cylinder 4 and the cooling quenching cylinder 6, and are fixedly installed on the upper end of the supporting base plate 1. The support frames 3 provide reliable support for the eddy current heating cylinder 4 and the cooling quenching cylinder 6, ensuring the stability of the entire device during operation and preventing tilting or displacement due to vibration or external forces, thus guaranteeing the smooth progress of the treatment process.

[0025] A ball-feeding tube 5 is fixed to the upper end of the eddy current heating cylinder 4 on the side away from the cooling and quenching cylinder 6. Inside the eddy current heating cylinder 4, a feeding zone 7 is formed along the lower end of the ball-feeding tube 5 to receive high-chromium steel balls. A heating zone 8 is formed on the other side of the interior of the eddy current heating cylinder 4, and a cooling zone 9 is formed inside the cooling and quenching cylinder 6.

[0026] Multiple induction hardening units 2 have their ball-collecting tubes 5 fixedly connected to a high-chromium steel ball distribution chamber 13 at their upper ends. The lower end face of the high-chromium steel ball distribution chamber 13 has an opening with the same inner diameter as the ball-collecting tube 5, ensuring that the high-chromium steel balls can smoothly and accurately enter the ball-collecting tube 5. A rectangular groove is formed on the outer side of the high-chromium steel ball distribution chamber 13, and a ball-guiding platform 14 is fixedly installed around the rectangular groove. Operators can conveniently pour high-chromium steel balls into the high-chromium steel ball distribution chamber 13 through the ball-guiding platform 14.

[0027] A spiral component 11 is fixedly installed in both the heating zone 8 and the cooling zone 9. The spiral component 11 spirals downwards along the inclined direction of the eddy current heating cylinder 4 and the cooling quenching cylinder 6. Because the diameter of the through hole in the spiral component 11 is smaller than the diameter of the high-chromium steel ball, when the high-chromium steel ball enters the device, it will move downwards along the spiral track of the spiral component 11 under the action of gravity. This spiral motion causes the high-chromium steel ball to continuously rotate during the processing, ensuring that all surfaces are treated evenly, improving the uniformity of the surface hardening treatment quality, and making the surface hardness of the high-chromium steel ball more consistent.

[0028] A high-frequency induction coil 10 is fixedly installed inside the eddy current heating cylinder 4 in the heating zone 8. The two ends of the high-frequency induction coil 10 extend downwards and are connected via conductive components. When the high-frequency induction coil 10 is energized, eddy currents are generated on the surface of the high-chromium steel ball according to the principle of electromagnetic induction. According to Joule's law, the eddy currents cause the high-chromium steel ball to heat up, thus achieving rapid and uniform heating. This eddy current heating method has significant advantages in terms of fast heating speed and high thermal efficiency, enabling the high-chromium steel ball to be heated to the required temperature in a short time.

[0029] A C-shaped bracket 15 is fixedly installed on the upper end of the support base plate 1 along the outer side of the area where the cooling and quenching cylinder 6 is located. An inlet pipe 16 is installed on the upper end of the C-shaped bracket 15. Multiple outlet pipes 17 are arranged in an array at the front and rear ends of the lower end of the C-shaped bracket 15. Several spray holes are provided on the lower end face of the outlet pipe 17. The outlet pipe 17 and the inlet pipe 16 are connected and internally communicated through an intermediate branch pipe, which is fixed on the C-shaped bracket 15. A cooling groove 20 is opened through the upper end of the outer surface of the cooling and quenching cylinder 6, and the outlet pipe 17 is located at the upper end of the cooling groove 20. When the high-chromium steel ball reaches the cooling zone 9, the liquid pump draws coolant (external auxiliary equipment, not shown in the figure) and outputs it through the inlet pipe 16, the intermediate branch pipe and the outlet pipe 17 to the spray holes on the lower surface of the outlet pipe 17. The coolant sprays downward and passes through the cooling groove 20 to contact the high-chromium steel ball, thereby achieving rapid cooling of the high-chromium steel ball. This spray cooling method allows the coolant to evenly cover the surface of the high-chromium steel balls, improving cooling efficiency and ensuring that the high-chromium steel balls can quickly form a uniform hardened layer, further enhancing their surface hardness and wear resistance. Meanwhile, the C-shaped bracket 15 provides stable support for the inlet pipe 16 and outlet pipe 17, ensuring the normal operation of the cooling system.

[0030] The lower end of the outer surface of the cooling and quenching cylinder 6 has multiple rectangular slots 12 arranged in a ring array. A liquid receiving tank 18 is installed at the lower end of the area where the cooling and quenching cylinder 6 is located, along the upper end of the supporting base plate 1. A drain pipe is provided on one side of the rear end face of the liquid receiving tank 18. During the cooling process, the coolant evaporates upon heating, and the remaining coolant flows into the liquid receiving tank 18 through the rectangular slots 12, facilitating centralized collection and treatment. This prevents the coolant from flowing randomly and allows the collected coolant to be filtered, purified, and reused.

[0031] Finally, the treated high-chromium steel ball falls into the lower receiving box 19 through the cooling and quenching cylinder 6, completing the entire surface hardening process.

[0032] Working principle: High-chromium steel balls enter the high-chromium steel ball distribution chamber 13 through the ball guide platform 14, and enter the feeding area 7 of the induction hardening unit 2 through the ball inlet pipe 5 at the lower end of the high-chromium steel ball distribution chamber 13; due to the tilt of the entire processing device at a certain angle, the high-chromium steel balls move downward under the influence of gravity. Since the diameter of the through hole in the middle of the spiral part 11 in the heating zone 8 and the cooling zone 9 is smaller than the diameter of the high-chromium steel ball, the high-chromium steel balls move along the high-chromium steel balls.

[0033] In the heating zone 8, the high-chromium steel ball is heated by eddy currents generated on its surface by the high-frequency induction coil 10. The high-chromium steel ball rotates along the spiral component 11 while being heated. When the high-chromium steel ball reaches the cooling zone 9, the liquid pump draws coolant and outputs it through the inlet pipe 16, the intermediate branch pipe and the outlet pipe 17 to the opening on the lower surface of the outlet pipe 17, so that the coolant sprays downward. The coolant passes through the cooling groove 20 and comes into contact with the high-chromium steel ball. Finally, the high-chromium steel ball falls into the lower receiving box 19 through the cooling quenching cylinder 6.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A surface hardening treatment device for high-chromium steel balls, comprising a supporting base plate (1), wherein the supporting base plate (1) is inclined, characterized in that: The upper end of the supporting base plate (1) is provided with multiple induction hardening units (2) from front to back. Each induction hardening unit (2) includes an eddy current heating cylinder (4) and a cooling hardening cylinder (6). The eddy current heating cylinder (4) and the cooling hardening cylinder (6) are inclined along the inclination direction of the supporting base plate (1). A ball tube (5) is fixed on the upper end of the eddy current heating cylinder (4) away from the cooling hardening cylinder (6). A feeding area (7) is formed inside the eddy current heating cylinder (4) along the lower end of the ball tube (5). A heating area (8) is formed on the other side inside the eddy current heating cylinder (4). A cooling area (9) is formed inside the cooling hardening cylinder (6). A spiral component (11) is fixed in both the heating area (8) and the cooling area (9). The spiral component (11) spirals downward along the inclination direction of the eddy current heating cylinder (4) and the cooling hardening cylinder (6).

2. The high-chromium steel ball surface hardening treatment device according to claim 1, characterized in that: A high-frequency induction coil (10) is fixed inside the inner wall of the eddy current heating cylinder (4) of the heating zone (8), and the two ends of the high-frequency induction coil (10) extend downward and are connected by conductive parts.

3. The high-chromium steel ball surface hardening treatment device according to claim 1, characterized in that: The upper ends of the ball-in-the-hole tubes (5) on the multiple induction hardening units (2) are all fixed with a high-chromium steel ball distribution chamber (13). The lower end face of the high-chromium steel ball distribution chamber (13) has an opening with the same diameter as the inner diameter of the ball-in-the-hole tube (5). The outer side of the high-chromium steel ball distribution chamber (13) has a rectangular groove and a ball-guiding platform (14) is fixed around the rectangular groove.

4. The high-chromium steel ball surface hardening treatment device according to claim 1, characterized in that: A C-shaped bracket (15) is fixed on the upper end of the support base plate (1) along the outside of the area where the cooling and quenching cylinder (6) is located. An inlet pipe (16) is installed on the upper end of the C-shaped bracket (15). Multiple outlet pipes (17) are arranged in an array at the front and rear ends of the lower end of the C-shaped bracket (15). Several spray holes are provided on the lower end face of the outlet pipe (17). The outlet pipe (17) and the inlet pipe (16) are connected and internally communicated through a middle branch pipe, which is fixed on the C-shaped bracket (15).

5. The high-chromium steel ball surface hardening treatment device according to claim 4, characterized in that: The upper end of the outer surface of the cooling quenching cylinder (6) is provided with a cooling groove (20), and the liquid outlet pipe (17) is located at the upper end of the cooling groove (20).

6. The high-chromium steel ball surface hardening treatment device according to claim 1, characterized in that: The lower end of the outer surface of the cooling and quenching cylinder (6) is provided with a ring array of rectangular slots (12). The upper end of the support base plate (1) is provided with a liquid receiving tank (18) along the lower end of the area where the cooling and quenching cylinder (6) is located. There is a drain pipe on one side of the rear end face of the liquid receiving tank (18).

7. The high-chromium steel ball surface hardening treatment device according to claim 1, characterized in that: The lower end of the eddy current heating cylinder (4) and the cooling and quenching cylinder (6) has multiple support frames (3), which are installed on the upper end of the support base plate (1). The upper end of the support base plate (1) is provided with a lower receiving box (19) along the output end of the cooling and quenching cylinder (6).

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