CN-113059139-B - Brake drum heating device and heating process

CN113059139BCN 113059139 BCN113059139 BCN 113059139BCN-113059139-B

Abstract

The invention discloses a brake drum heating device which comprises at least one heating station and two or more groups of mobile workpiece conveying devices. The heating station is provided with a heating coil, and the movable workpiece conveying device is provided with a brake drum positioning mechanism which can alternately and circularly convey the workpiece to the heating station for heating. The specific structure can be a three-station heating device, and further comprises a feeding station and a preheating station, wherein the preheating station is provided with a preheating coil, and the feeding station, the preheating station and the heating station are fixed stations. The movable workpiece conveying devices are three groups, respectively move corresponding feeding stations, preheating stations and heating stations which are alternately circulated, and alternately convey workpieces to the positions of the preheating stations and the heating stations. The heating process is completed through the processes of feeding, descending and rotating, ascending and preheating, descending and rotating, ascending and heating, material taking and the like. The three groups of workpiece conveying devices respectively and alternately complete the processes, so that the assembly line operation is realized, and the production efficiency is improved.

Inventors

LIN QIANGSHENG
ZHANG JIANRONG

Assignees

嘉兴四通车轮股份有限公司

Dates

Publication Date: 20260508
Application Date: 20210415

Claims (8)

1. A brake drum heating device is a three-station brake drum induction heating device and is characterized by comprising a heating station, a preheating station, a fixed disc of a feeding station and a rotating disc of three groups of workpiece conveying devices which are arranged in the same plane, concentric, equal diameter and equal radian, wherein the radian between the three groups of workpiece conveying devices is 120 degrees, the heating station is provided with a heating coil, the preheating station is provided with a preheating coil, the heating coil has more turns and higher power and is distributed at all parts of a shell body part of a heating brake drum, the preheating coil has fewer turns and lower power and is only arranged at the part with larger thickness of the shell of the heating brake drum, the workpiece conveying devices are provided with workpiece positioning mechanisms, the three groups of workpiece conveying devices can respectively move the heating coils which are corresponding to the feeding station, the preheating station and the heating station and can alternately and circularly convey workpieces into the heating coils of the heating station, the workpiece conveying devices are arranged in the heating coil of the heating station and the preheating station, the workpiece conveying devices drive the workpieces to rotate when the workpieces are preheated or heated, and the fixed disc and the rotating disc are horizontally arranged in parallel to the rotating device and the lifting device when the rotating device is arranged up and down.
2. The brake drum heating device according to claim 1, wherein the rotating disk is rotated to realize alternate circulation of the workpiece conveying device and vertically corresponds to the feeding station, the preheating station and the heating station, and the rotating disk is lifted to realize alternate circulation of the workpiece conveying device and is positioned at the feeding station, the preheating station and the heating station.
3. A brake drum heating device is a three-station brake drum induction heating device and is characterized by comprising a heating station, a preheating station, a fixed disc of a feeding station and a rotating disc of three groups of workpiece conveying devices which are arranged in the same plane, concentric, equal diameter and equal radian, wherein the radian between the three groups of workpiece conveying devices is 120 degrees, the heating station is provided with a heating coil, the preheating station is provided with a preheating coil, the heating coil has more turns and higher power and is distributed at all parts of a shell body part of a heating brake drum, the preheating coil has fewer turns and lower power and is only arranged at the part with larger thickness of the shell of the heating brake drum, the workpiece conveying devices are provided with workpiece positioning mechanisms, the three groups of workpiece conveying devices can respectively move the heating coils which are corresponding to the feeding station, the preheating station and the heating station and can alternately circulate and convey workpieces into the heating coil of the heating station, the workpiece conveying devices are arranged in the heating coil of the heating station and the preheating station, the workpiece conveying devices drive the workpieces to rotate when the workpieces are preheated or heated, the fixed disc and the rotating disc are horizontally arranged in parallel to the rotating disc, and the workpiece conveying devices are arranged in the lifting device.
4. A brake drum heating apparatus as defined in claim 3, wherein the rotating disk vertically corresponds to a loading station, a preheating station and a heating station for realizing alternate circulation of the workpiece conveying device by rotation, and the workpiece conveying device is positioned at the loading station, the preheating station and the heating station for realizing alternate circulation of the workpiece conveying device by a lifting device.
5. A brake drum heating process of a brake drum heating apparatus as claimed in claim 1 or 2, comprising the steps of: the first step of feeding, namely fixing a workpiece on a workpiece transfer device of a feeding station when a rotary disk is at a horizontal high position; The second step of descending rotation, namely the rotating disc descends to a horizontal low position and rotates for 120 degrees; thirdly, ascending and preheating, namely ascending the rotating disc to a horizontal high position, and placing a workpiece into a preheating coil of a preheating station for preheating; the fourth step of descending rotation, namely the rotating disc descends to a horizontal low position and rotates for 120 degrees; Fifthly, rising and heating, namely rising the rotating disc to a horizontal high position, and heating a workpiece in a heating station heating device; And step six, taking materials, namely taking down the workpiece to finish the heating process, and continuously rotating the rotating disc to enter the next working procedure.
6. The heating process according to claim 5, wherein the workpiece conveying device is located at the preheating station and the preheating station for workpiece loading and workpiece preheating, and the workpiece conveying device is located at the heating station and the loading station for workpiece heating and workpiece loading, respectively, and the workpiece is preheated in the preheating coil and heated in the heating coil, and the workpiece is driven to rotate by the rotation device provided by the workpiece conveying device.
7. A brake drum heating process of a brake drum heating apparatus as claimed in claim 3 or 4, characterized by comprising the following processes: the first step of feeding, namely fixing a workpiece on a workpiece conveying device when the workpiece conveying device is positioned at a horizontal high position of a feeding station; The second step of descending rotation, namely the workpiece conveying device descends to a horizontal low position, and the rotating disc rotates for 120 degrees; thirdly, rising and preheating, namely rising to a horizontal high position when the workpiece conveying device rotates to a preheating station, and preheating the workpiece in a preheating coil; The fourth step of descending rotation, namely the workpiece conveying device descends to a horizontal low position, and the rotating disc rotates for 120 degrees; step five, rising and heating, namely rising to a horizontal high position when the workpiece conveying device rotates to a heating station, and preheating a workpiece in a heating coil; And step six, taking materials, namely taking down the workpiece to finish the heating process, and continuously rotating the rotating disc to enter the next working procedure.
8. The heating process according to claim 7, wherein the workpiece conveying device is located at the preheating station and the preheating station for workpiece feeding and workpiece preheating, and the workpiece conveying device is located at the heating station and the feeding station for workpiece heating and workpiece feeding, respectively, and the workpiece is preheated in the preheating coil and heated in the heating coil, and the workpiece is rotated by the rotation device provided by the workpiece conveying device.

Description

Brake drum heating device and heating process Technical Field The invention relates to a workpiece heating device, in particular to a heating device in the process of preparing and maintaining a metal brake drum, and also relates to a heating process of the heating device. Background In the process of manufacturing and repairing a metal brake drum, a brake drum or a brake drum shell of a semi-finished product needs to be heated, and a common heating device is intermediate frequency electromagnetic heating at present. The workpiece to be heated is placed in the medium-frequency induction coil, and after the workpiece is electrified, the function of heating is realized through eddy currents generated by electromagnetic induction. For example, in the manufacture of bimetallic drums, it is necessary to heat the drum shell of steel material to above 700 degrees celsius, even up to 1200 degrees celsius, in order to centrifugally cast the gray cast iron friction layer within the steel shell. The heating of the brake drum shell is a key necessary process for manufacturing the bimetallic brake drum, and the steel brake drum shell is placed in an intermediate frequency induction coil and heated by electromagnetic induction. However, the existing brake drum shell heating is still in a single body heating state, and the production efficiency is low. In order to improve production efficiency, some pipeline operation is adopted, namely, a plurality of sets of electromagnetic induction heating devices are arranged for circulating pipeline heating. The method needs to be provided with a plurality of sets of heating systems, and needs a plurality of sets of independent heating control devices, and the heating control devices of the plurality of sets still need to be controlled independently when performing cyclic heating. Different workpieces need to be heated in different heating devices, so that the heating effects of the different workpieces are not completely consistent, and the difference of heating temperature rise temperature is generated, so that the casting quality of the brake drum is affected. In the heating system requiring a plurality of sets of control devices and a plurality of sets of heating devices, the defects of complex structure and high operation and maintenance cost exist. There are also prior art devices that combine a heating device with a brake drum centrifugal casting line, as shown in fig. 7, with a single heating device provided on a multi-station centrifugal casting machine to heat each brake drum shell entering the line. The electromagnetic heating coil is shown as requiring a reciprocating motion by which a brake drum housing located on the centrifuge is nested within the heating coil. The multi-station centrifugal casting machine using the heating device needs to be provided with at least one feeding station, one heating station and one casting station, otherwise, the assembly line operation cannot be realized. The heating device needs to occupy a certain station, and the generated defects are that the assembly line is slow to operate and the production efficiency is difficult to improve. Meanwhile, as the heating station is single, heating can only be performed, and the preheating function is not provided, the heating effect of the shell with the wavy shell or the shell with different thickness is possibly uneven during heating, and the temperature rise of different parts of the shell of the brake drum is uneven, so that the casting quality is affected. In view of the above, the present inventors have invented a brake drum heating device, and developed a brake drum heating process of such a device, which can not only realize pipelined brake drum heating, but also ensure uniform heating effect and high production efficiency. Disclosure of Invention The invention aims to provide a brake drum heating device which can realize rapid and uniform heating of a brake drum or a brake drum shell. Another object of the present invention is to provide a heating process for use with the heating device described above. The brake drum heating device comprises at least one heating station and two or more groups of workpiece conveying devices, wherein the heating station is provided with a heating coil, the workpiece conveying devices are provided with workpiece positioning mechanisms, and the two or more groups of workpiece conveying devices can alternately and circularly convey workpieces into the heating coils of the heating station. In the brake drum heating device, the brake drum heating device further comprises a feeding station and a preheating station, wherein the preheating station is provided with a preheating coil, the feeding station, the preheating station and the heating station are fixedly arranged, the workpiece conveying device is three groups, and the workpiece conveying device can respectively and alternately circulate in a movable mode and corresponds to the feeding station, the preheatin