CN116004969A - Special-shaped roller surface induction quenching device - Google Patents

Abstract

The invention discloses a special-shaped roller surface induction quenching device, which belongs to the field of quenching devices and comprises a quenching induction coil matched with the special-shaped roller in shape, wherein the gap between the part to be quenched of the special-shaped roller and each part of the induction coil is the same. The quenching induction coil is divided into a plurality of areas which are controlled independently of each other, and each area is provided with an independent power connector which is connected with a power supply through a cable. A plurality of temperature measuring holes are uniformly formed in the quenching induction coil and used for monitoring, and the quenching induction coil is matched with respective heating areas to ensure that the temperature of the surface of the roller body is consistent. The invention can meet the surface induction quenching of the special-shaped roller with the diameter difference of more than 60mm, the uniformity of the roller surface is controlled within 3HSD, and the depth of a hardening layer reaches 90mm.

Description

Special-shaped roller surface induction quenching device

Technical Field

The invention relates to the field of quenching devices, in particular to a special-shaped roller surface induction quenching device.

Background

Induction hardening is a rapid, selective method of hardening the surface of metal parts by placing copper coils carrying a large amount of alternating current in proximity to the parts without contact, eddy and hysteresis losses generate a large amount of heat at and near the surface, and subsequent cooling by water is accomplished. The conventional forged steel roller body has the same diameter, no drop and no sharp angle, and can be directly used for induction quenching, and the conditions of uneven temperature, cracking and the like can not occur.

The existing special-shaped roller needs quenching, the shape is shown in fig. 1, the roller body is divided into three sections, the diameter difference exists, obvious fall and sharp angle exist at the position of the diameter difference, the diameter difference exceeds 60mm, if the existing conventional induction coil is still used for quenching the whole body of the special-shaped roller in three sections, because the diameter difference exists obviously, the temperature change can be quite large along with the change of the diameter size in the heating process, the temperature of the surface of the roller body cannot be kept consistent, the highest temperature difference is about 35 ℃, the control is extremely difficult, the hardness uniformity of the roller surface of the special-shaped roller after quenching treatment is poor, certain influence exists on a hardening layer, the depth is different, and the problem that cracks easily appear at the position of the size change in the heating process can not meet the requirement of a finished product. If sectional quenching is adopted to quench the roller bodies of the special-shaped rollers respectively, the requirements on temperature control are higher, the quenching is not integrated, the influence on the quality of products is larger, and the technological requirements of the finished products are difficult to meet. The conventional induction quenching coil is provided with a temperature measuring hole for detecting the temperature every 8-12 turns of coil conventionally, and because the temperature difference is large due to different diameters during quenching of the special-shaped roller, the temperature on the surface of the roller body needs to be comprehensively and carefully detected, so that the problem that products with excessive temperature difference are unqualified is solved, and a large number of temperature measuring holes are required to be uniformly distributed. Therefore, the conventional induction quenching coil is difficult to cope with the inconsistent diameter of the roll body, and has the production work of quenching the roll body of the special-shaped roll with larger fall and sharp angle.

Disclosure of Invention

The invention aims to solve the technical problem of providing a special-shaped roller surface induction quenching device which can integrally quench a special-shaped roller with a roller body with a diameter difference of more than 60 mm.

In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a special-shaped roll surface induction hardening device, includes with special-shaped roll shape assorted quenching induction coil, makes the special-shaped roll wait to quench the clearance of part and induction coil each part the same, quench induction coil divide into a plurality of regions, all is provided with independent power connection on the coil of every region, and every power connection all links to each other with the power through copper water-cooling cable to make the coil region circular telegram that each power connection corresponds and through the power output of power control each region, realize the turn control of coil.

The technical scheme of the invention is further improved as follows: the quenching induction coil is provided with temperature measuring holes, one temperature measuring hole is designed between each circle of coils in the vertical direction, and 5 temperature measuring holes are arranged on each circle of coils in the circumferential direction.

The technical scheme of the invention is further improved as follows: the quenching induction coil is in a shape of a combined round table with a larger upper end diameter and a smaller lower end diameter, the diameter fall is in conical transition, a plurality of clamping plates are arranged on the periphery of the quenching induction coil, the lower ends of the clamping plates are vertical, the upper ends of the clamping plates extend from inside to outside, the topmost ends of the clamping plates are vertical, a plurality of screws are arranged on the clamping plates for fixing, and the clamping plates clamp the induction coil to hold the special shape matched with a roller.

The technical scheme of the invention is further improved as follows: detachable asbestos is arranged in the temperature measuring holes on the quenching induction coil and used for heat preservation during quenching.

The technical scheme of the invention is further improved as follows: the quenching induction coil is divided into 3-6 areas, the voltage and the output power of each area can be regulated by a power supply according to different process requirements, the voltage range is 300-400V, and the output power is 200-400kw.

By adopting the technical scheme, the invention has the following technical progress: the quenching induction coil is arranged to be matched with the shape of the roller body of the special-shaped roller, so that the special-shaped roller can be integrally quenched, the roller and the coil are identical in intermittence, the identical temperature of the roller body surface of the roller can be effectively ensured, and the process requirements are met. Through setting up a large amount of evenly distributed's temperature measurement holes, can be convenient for observe the work piece axial and the different position temperatures of hoop, make its heating more even. Through dividing the induction coil into a plurality of areas, each area has independent power connection, and the quenching temperature of each independent area can be controlled through corresponding power output, so that the control of dividing turns can be realized, different heating area lengths can be selected according to different shapes and different lengths of the workpiece, the workpiece is heated more uniformly, and unnecessary energy waste is avoided. In addition, according to different shapes of the workpiece, reasonable voltage, power and other parameters of the heating area are selected, so that the overall temperature of the workpiece is uniformly controlled, the temperature deviation of the workpiece is controlled within 10 ℃ by matching with the temperature measuring hole to monitor the temperature of the roller body, the overall temperature of the workpiece is uniformly controlled, the same quenching temperature is ensured, the uniformity of the roller surface after quenching is controlled within 3HSD, and the depth of a hardening layer reaches 90mm.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art;

FIG. 1 is a block diagram of a profiled roll to be quenched;

FIG. 2 is a block diagram of a special-shaped roller surface induction hardening device;

Detailed Description

The invention is further illustrated by the following examples:

example 1

As shown in FIG. 1, the special-shaped roller to be subjected to quenching treatment has a schematic structure, the diameters of roller bodies are not uniform, the diameter difference is more than 60mm, and obvious fall and sharp angles are provided. As shown in FIG. 2, the structure diagram of the special-shaped roller surface induction quenching device is shown, the main body is a quenching induction coil, the quenching induction coil is in the shape of a combined round table with the upper end with larger diameter and the lower end with smaller diameter, and the diameter drop is in conical transition, so that the special-shaped roller is matched with the shape of the special-shaped roller, when the inside of the quenching induction coil is heated, the gaps between the roller body part of the special-shaped roller and each part of the external induction coil are the same, and the temperature consistency of the outside of the roller body is ensured to a certain extent when the roller body of the special-shaped roller is heated. The quenching induction coil is characterized in that a plurality of clamping plates are arranged on the periphery of the quenching induction coil, a plurality of screws are arranged on each clamping plate and used for fixing, the clamping plates are vertical in shape, the upper ends of the clamping plates extend from inside to outside, the topmost ends of the clamping plates are vertical, the clamping plates are matched with the coil in shape, and the induction coil is hooped and fixed by the clamping plates so as to maintain a special shape matched with the roller in shape.

The quenching induction coil is divided into 3-6 areas, an independent power connector is arranged on the coil of each area, and each connector is connected with a power supply through a copper water-cooling cable. The quenching temperature of each independent area is controlled by controlling the voltage and the output power of the coils in each area through controlling the output of the power supply, so that the partition control of the coils is realized. The coil is controlled in a partitioning mode, different heating area lengths can be selected according to different shapes and different lengths of the workpiece, the heating area of the special-shaped roller is attached to the special-shaped roller, heating is more uniform, unnecessary energy waste is avoided, and the concept of energy conservation and environmental protection is compounded. According to different workpiece shapes, the parameters such as voltage, power and the like of different heating areas are reasonably selected, so that the overall temperature of the workpiece is uniformly controlled, and the temperature deviation of the overall workpiece is controlled within 10 ℃. The larger coil diameter corresponds to the voltage of the heating area, the higher output power, and the smaller coil diameter corresponds to the voltage of the heating area, and the lower output power. The voltage range is 300-400v, and the output power is 200-400kw.

Example two

The embodiment further describes a quenching induction coil on the basis of the first embodiment, wherein a large number of temperature measuring holes are uniformly formed in the quenching induction coil, and one temperature measuring hole is designed between each two coils in the vertical direction and in the circumferential direction. Every circle is last evenly to set up 5 temperature measurement holes, and quenching induction coil is provided with 120 temperature measurement holes generally, all is provided with detachable asbestos in every temperature measurement hole, blocks the temperature measurement hole and is used for keeping warm when quenching, and the asbestos is dismantled when needs temperature measurement, and infrared temperature measuring instrument passes through the roll body of the roll that exposes by the temperature measurement hole, measures the surface temperature of detecting the roll body of the roll. When the quenching induction coil heats the roller body, the temperature of different positions of the roller body is monitored through a plurality of temperature measuring holes on the quenching induction coil by utilizing a plurality of infrared thermometers, so that the uniformity of the temperature of the roller body is ensured, when the overlarge temperature difference of different positions is detected, the temperature can be regulated by regulating the power supply output of different heating areas, the respective output power is regulated by regulating the different heating areas of the quenching induction coil, and the temperature deviation of a workpiece is controlled within 10 ℃ in the quenching heating process by matching with the temperature detection of the plurality of temperature measuring holes.

The invention solves the problem that the product with the diameter difference on the roller surface is difficult to be subjected to surface induction quenching. After the technology is applied, the surface induction quenching of the special-shaped roller with the diameter difference of more than 60mm can be satisfied, the uniformity of the roller surface is controlled within 3HSD, and the depth of a hardening layer reaches 90mm.

The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the design of the present invention.

Claims (5)

1. The utility model provides a special-shaped roller surface induction hardening device, includes with special-shaped roller shape assorted quenching induction coil, makes special-shaped roller wait to quench the clearance of each part of part and induction coil the same, its characterized in that: the quenching induction coil is divided into a plurality of areas, independent power connectors are arranged on the coil of each area, each power connector is connected with a power supply through a copper water-cooling cable, so that the coil area corresponding to each power connector is electrified and the power output of each area is controlled through the power supply, and the turn division control of the coil is realized.

2. The profiled roll surface induction hardening apparatus as set forth in claim 1, wherein: the quenching induction coil is provided with temperature measuring holes, one temperature measuring hole is designed between each circle of coils in the vertical direction, and 5 temperature measuring holes are arranged on each circle of coils in the circumferential direction.

3. The profiled roll surface induction hardening apparatus as set forth in claim 1, wherein: the quenching induction coil is in a combined round table with the upper end with the larger diameter and the lower end with the smaller diameter and the conical transition at the diameter drop, a plurality of clamping plates are arranged on the periphery of the quenching induction coil, the lower ends of the clamping plates are vertical, the upper ends of the clamping plates extend from inside to outside, the topmost ends of the clamping plates are vertical, a plurality of screws are arranged on the clamping plates for fixing, and the clamping plates clamp the induction coil to hold the special shape matched with the roller.

4. The profiled roll surface induction hardening apparatus as set forth in claim 2, wherein: detachable asbestos is arranged in the temperature measuring holes on the quenching induction coil and used for heat preservation during quenching.

5. The profiled roll surface induction hardening apparatus as set forth in claim 1, wherein: the quenching induction coil is divided into 3-6 areas, the voltage and the output power of each area can be regulated by a power supply according to different process requirements, the voltage range is 300-400V, and the output power is 200-400kw.

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