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CN-116497204-B - Process for changing quenching temperature according to workpiece diameter

CN116497204BCN 116497204 BCN116497204 BCN 116497204BCN-116497204-B

Abstract

The invention provides a process for changing quenching temperature according to the diameter of a workpiece, and relates to the field of metal heat treatment. The process for changing the quenching temperature according to the diameter of the workpiece comprises the following steps of measuring and calculating the diameter of the spherical workpiece, firstly obtaining the time for the workpiece to pass through a high-frequency heating coil, secondly obtaining the heat generated by the workpiece per unit time per unit current according to the material of the workpiece, calculating the current used by the workpiece to reach the designated quenching depth and the quenching temperature according to the quenching process, thirdly, sending the workpiece into a temperature-equalizing chamber after the workpiece is heated for the first time, and fourthly, taking out the workpiece in the temperature-equalizing chamber and placing the workpiece in quenching liquid for treatment. The quenching quality is improved by precisely controlling the quenching conditions and carrying out soaking treatment on the workpiece.

Inventors

  • REN XIAOYU
  • REN YONGSHENG

Assignees

  • 武安市前进铸造有限公司

Dates

Publication Date
20260508
Application Date
20230424

Claims (7)

  1. 1. A process for varying a quenching temperature according to a diameter of a workpiece, comprising the steps of: Measuring and calculating the diameter of a sphere workpiece; Firstly, obtaining the time of a workpiece passing through a high-frequency heating coil, secondly, obtaining the heat generated by the workpiece per unit time and per unit current according to the material of the workpiece, and calculating the current used by the workpiece to reach a specified quenching depth and quenching temperature by combining a quenching process; step three, after the workpiece is heated for the first time, the workpiece is sent into a temperature equalizing chamber, the temperature of the chamber is 50-100 ℃ higher than the quenching temperature, and the time is controlled to be lower than 10s; Step four, taking out the workpiece in the temperature equalizing chamber, and placing the workpiece in quenching liquid for treatment; The quenching device comprises a heating device (1) and a quenching tank (2), wherein the quenching tank (2) is arranged on one side of the heating device (1), the heating device (1) comprises a shell (3), a second chute (9) is obliquely arranged in the middle of the upper end of the shell (3), a blanking port (16) is formed in the lower part of the second chute (9), a coil (4) is arranged below the blanking port (16), a first chute (7) is obliquely arranged in the shell (3), an equalizing pipe (5) in an electric heating mode is fixedly connected to the middle of the first chute (7), and one end of the first chute (7) is located under the coil (4); The blanking mouth (16) department slides and is provided with baffle (12), the upper end fixedly connected with rack (13) of baffle (12), the upper end fixedly connected with of shell (3) has servo motor (14) of encoder, the output fixedly connected with gear (15) of servo motor (14), gear (15) and rack (13) meshing set up.
  2. 2. A process for changing a quenching temperature according to a diameter of a workpiece as set forth in claim 1, wherein said quenching liquid is a water-soluble quenching medium.
  3. 3. The process for changing quenching temperature according to the workpiece diameter according to claim 1, wherein the lower end of the shell (3) is fixedly connected with a hydraulic cylinder (10), the upper end of the hydraulic cylinder (10) is provided with a hydraulic rod (18) in an extending mode, the hydraulic rod (18) penetrates through the first chute (7) upwards, the hydraulic rod (18) is located right below the coil (4), and the upper end of the hydraulic rod (18) is provided with an arc-shaped groove.
  4. 4. A process for changing quenching temperature according to workpiece diameter according to claim 3, wherein the first chute (7) is fixedly connected with a push rod (17), and the push rod (17) is positioned at the high position of the first chute (7) and is arranged close to a hydraulic rod (18).
  5. 5. The process for changing quenching temperature according to the diameter of a workpiece according to claim 1, wherein the two sides of the upper end of the baffle plate (12) are connected with fixing bolts (11) in a threaded manner, and the lower ends of the fixing bolts (11) are propped against the shell (3).
  6. 6. The process for changing the quenching temperature according to the diameter of the workpiece as claimed in claim 1, wherein the two sides of the lower end of the shell (3) are fixedly connected with a supporting plate (6).
  7. 7. The process for changing quenching temperature according to the workpiece diameter as claimed in claim 1, wherein the side wall of the housing (3) is provided with a discharge port (8), one end of the first chute (7) is arranged on the discharge port (8), and the discharge port (8) is arranged towards the quenching tank (2).

Description

Process for changing quenching temperature according to workpiece diameter Technical Field The invention relates to the technical field of metal heat treatment, in particular to a process for changing quenching temperature according to the diameter of a workpiece. Background The grinding balls act as grinding media to crush and grind the materials by self-grinding and mutual impact friction of ore, limestone, coal, etc. in the ball mill. Therefore, the surface hardness of the grinding ball is high, and conventional means for increasing the surface hardness by quenching the grinding ball are required. In the existing grinding ball quenching process, most grinding balls are placed in a quenching furnace for integral heating. Typically, the grinding balls are heated entirely, i.e., at the center of the ball, to a temperature required for quenching. During quenching, the internal and external temperature difference is large, so that stress concentration is caused, the surface of the grinding ball is easy to crack or is easy to break in the collision process during later use. Meanwhile, the grinding ball is heated integrally, so that more energy sources can be consumed, and the energy consumption is high. Disclosure of Invention (One) solving the technical problems Aiming at the defects of the prior art, the invention provides a process for changing the quenching temperature according to the diameter of a workpiece, and solves the problems of high quenching energy consumption, easy occurrence of stress concentration and poor quality of the existing grinding ball. (II) technical scheme The invention is realized by the following technical scheme that the process for changing the quenching temperature according to the diameter of a workpiece comprises the following steps: measuring and calculating the diameter of a sphere workpiece, wherein the diameter is used for calculating the quantity of heat required for reaching the quenching temperature of the sphere workpiece, and the material of the sphere workpiece is needed to be known at the moment and the specific heat capacity of the workpiece is acquired; Firstly, obtaining the time of a workpiece passing through a high-frequency heating coil, wherein the time can be manually adjusted, secondly, obtaining the heat generated by the workpiece per unit time per unit current according to the material of the workpiece, and calculating the current used by the workpiece to reach a specified quenching depth and quenching temperature by combining a quenching process; Step three, after the workpiece is heated for the first time, in the process of heating for the first time, the temperature of the workpiece can be obtained through a non-contact temperature sensor, the temperature of the workpiece is obtained, in the heating process, the current is finely adjusted, so that the workpiece can obtain the optimal quenching temperature, the workpiece is fed into a temperature equalizing chamber, in the process of passing through a high-frequency heating coil, the temperature of the outermost part of the workpiece is high, the temperature of the lower part and the upper part of the workpiece is lower, soaking treatment is needed, the temperature of the chamber is higher than the quenching temperature by 50-100 ℃, the time is controlled to be lower than 10 seconds, the temperature at the sphere center of the workpiece is prevented from being too high, and the surface of the workpiece is prevented from being burst due to concentration of internal stress during quenching; And step four, taking out the workpiece in the temperature equalizing chamber, placing the workpiece in quenching liquid for treatment, and naturally cooling after taking out the workpiece. Preferably, the quenching liquid adopts a water-soluble quenching medium. The utility model provides a device according to work piece diameter change quenching temperature, includes heating device and quenching tank, the quenching tank is placed in one side of heating device, heating device includes the shell, the upper end middle part slope of shell is provided with the second chute, the low department of second chute is provided with the blanking mouth, the below of blanking mouth is provided with the coil, the inside slope of shell is provided with first chute, the middle part fixedly connected with electrical heating form's of first chute equalizing pipe, the one end of first chute is located under the coil. The workpiece is placed in the second chute, rolls to the blanking port under the action of gravity and falls onto the first chute, passes through the coil in the process to realize heating, rolls from the first chute and is sent into the quenching tank, and passes through the equalizing pipe in the process to uniformly heat the workpiece. The blanking mouth department slides and is provided with the baffle, the upper end fixedly connected with rack of baffle, the upper end fixedly connected with of shell possesses the servo