CN110703825A - Regulating and controlling system for waste heat of powder metallurgy connecting rod process - Google Patents

Abstract

The invention discloses a regulation and control system for waste heat in a powder metallurgy connecting rod process, which is mainly used for regulating and controlling waste heat and temperature data in sintering, forging and air cooling control processes of a powder metallurgy connecting rod. The main technical scheme is as follows: the system comprises a temperature sensing module A, a temperature control module B, a human-computer interaction module C, a local alarm module D, a remote alarm module E, a fan control module F, a transmission regulation module G, a main control module, an industrial personal computer and a bus transceiver, wherein each module is connected with other modules through the bus transceiver, and the main control module H is connected with the industrial personal computer independently. The invention proves through trying: the phenomena of energy waste and inaccurate temperature data control are fundamentally overcome, energy is saved, the quality of the connecting rod is guaranteed, the working environment is improved, the production efficiency is improved, and the requirement of modern production is met.

Description

Regulating and controlling system for waste heat of powder metallurgy connecting rod process

Technical Field

The invention relates to a temperature regulation and control system for manufacturing an engine connecting rod, in particular to a regulation and control system for waste heat and temperature data of a powder metallurgy connecting rod in the processes of sintering, forging and controlling air cooling.

Background

The connecting rod is a key part of an engine (see figure 1), and with the rapid development of science and technology, a high-strength, low-friction and light-weight powder metallurgy connecting rod (hereinafter referred to as a connecting rod) is adopted internationally and gradually goes to the market. However, the industrial production cannot be realized due to the limitations of the process level and the technical equipment in China, the specific manufacturing technology is not reported, and particularly, the core technology of the connecting rod for treating, regulating and controlling the waste heat temperature in the processes of sintering, forging and controlling air cooling is blank.

As a factory for producing specialized engine connecting rods, the process flow (shown in figure 2) for manufacturing the connecting rods mainly comprises the steps of mixing metal powder, pressing and forming, sintering, forging, controlling air cooling, inspecting and the like. In actual operation, the temperature in a sintering furnace is required to reach over 1250 ℃, the sintered connecting rod has 1250 ℃ by chromatographic comparison measurement, and the connecting rod enters the next working procedure for forging after being cooled; during forging, the forging temperature is required to be heated to more than 1150 ℃ again for forging, the temperature is still more than 850 ℃ after the forging is finished according to chromatographic comparison measurement, and the next controlled air cooling process is carried out after cooling; controlled air cooling heats the connecting rod to about 950 c and decreases at a rate to about 510 c. The processing and manufacturing have the following defects that 1, the waste heat of the sintering process and the waste heat of the forging process are not well utilized, waste is caused, and the environment is not favorable. 2. In the process, the temperature data of each procedure is manually measured on site and controlled by a simple inlet and outlet, the control accuracy is poor, and the defects and instability of the metallographic structure of the connecting rod are directly influenced, so that waste products are generated. 3. Temperature data control can only be carried out on site, which causes poor working environment and low working efficiency. These technical difficulties are urgently solved.

Disclosure of Invention

The main technical problems and purposes to be solved by the invention are as follows: aiming at the defects of the existing connecting rod in the processes of sintering, forging and controlling air cooling, the technical improvement is carried out, and a regulation and control system for the process waste heat and temperature data of the powder metallurgy connecting rod is designed by utilizing the modern electronic technical means. The phenomena of energy waste, inaccurate temperature data control and low working efficiency are fundamentally overcome. The energy is saved, the quality of the connecting rod is guaranteed, the working environment is improved, the production efficiency is improved, and the requirement of modern production is met.

The main technical scheme of the invention is as follows: the system comprises a temperature sensing module A, a temperature control module B, a human-computer interaction module C, a local alarm module D, a remote alarm module E, a fan control module F, a transmission regulation module G, a master control module H, an industrial personal computer and a bus transceiver; the structure is as follows: the temperature sensing module A is connected with the temperature control module B, the human-computer interaction module C, the local alarm module D, the remote alarm module E, the fan control module F, the transmission regulation module G and the master control module H are connected with each other through a bus transceiver; each module realizes the function of the module and exchanges data communication with other modules through the bus transceiver; in the use, H master control module and industrial computer are installed at the office, synthesize the regulation and control condition of each module and pass through the display screen report, and all the other modules are all installed at the job site in workshop, through the regulation and control condition of this process of display screen report and each link.

The invention is proved by practical application that: the invention can directly forge the residual temperature of the sintered connecting rod, and directly control the air cooling of the forged residual temperature without reheating, thereby effectively saving energy and saving more than sixty-five percent of electricity; in the process of utilizing the sintering and forging residual heat, parameters and links such as the sintering temperature, the forging temperature, the die temperature, the phase change temperature of the powder metallurgy material and the like of the connecting rod are monitored in real time, automatically adjusted and corrected, and recorded and stored; the metallographic structure, hardness and mechanical properties of the treated connecting rod all reach the standard, no crack, no stress rebound and qualified torsion resistance, the product quality is effectively improved, and the blank of domestic powder metallurgy connecting rod manufacturing is filled; in the regulation and control process, the on-duty personnel can monitor through the screen at the scene or the place beyond the scene, meet abnormal conditions and send out the warning, and the on-duty personnel receives the information and in time handles through the cell-phone in the place far away to the cost has been saved.

Drawings

The following describes in further detail embodiments of the present invention with reference to the accompanying drawings.

FIG. 1 is a schematic view of a powder metallurgy connecting rod.

FIG. 2 is a process flow diagram of a powder metallurgy connecting rod.

Fig. 3 is a structural diagram of the present invention and is also a schematic diagram of the working principle of the present invention.

FIG. 4 is a schematic view showing the control of the sintering process according to the present invention, wherein a furnace temperature probe A1 is installed in the sintering furnace.

FIG. 5 is a schematic diagram of the forging process control of the present invention, wherein a closed forging die is provided with a forging temperature probe A2 and a die temperature probe A3.

Fig. 6 is a schematic view of the regulation and control of the air cooling control process of the present invention, and an inlet temperature probe a4 and an outlet temperature probe a5 are installed in the air cooling control device.

Detailed Description

Referring to FIG. 3, the main technical scheme of the invention is explained, wherein the system comprises a temperature sensing module A, a temperature control module B, a human-computer interaction module C, a local alarm module D, a remote alarm module E, a fan control module F, a transmission adjusting module G, a main control module H, an industrial personal computer and a bus transceiver; the structure is as follows: the temperature sensing module A is connected with the temperature control module B, the human-computer interaction module C, the local alarm module D, the remote alarm module E, the fan control module F, the transmission regulation module G and the master control module H are connected with each other through a bus transceiver; each module realizes the function of the module and exchanges data communication with other modules through the bus transceiver; in the use, H master control module and industrial computer are installed at the office, synthesize the regulation and control condition of each module and pass through the display screen report, and all the other modules are all installed at the job site in workshop, through the regulation and control condition of this process of display screen report and each link.

Referring to fig. 3, the temperature sensing module a is composed of a temperature sensor, a sensor probe, and a display screen (Lcd 12864); the temperature control module B consists of a single chip microcomputer controller (STM32F103ZET6), an electric signal conversion resistor (4-20ma), a bus transceiver (PCA82C250) and a display screen (Lcd 12864); the C human-computer interaction module consists of a single-chip microcomputer controller (STM32F103ZET6), a bus transceiver (PCA82C250), a display screen (Lcd12864) and keys; the local alarm module consists of a single chip microcomputer controller (STM32F103ZET6), a bus transceiver (PCA82C250), a Mos tube (2sc2233), an alarm (LTA-505-3TJ) and a display screen (Lcd 12864); the E remote alarm module consists of a single chip microcomputer controller (STM32F103ZET6), a bus transceiver (PCA82C250), a remote wireless communication module (GPRS), a communication module (SIM800C) and a display screen (Lcd 12864); the F fan control module consists of a single chip microcomputer controller (STM32F103ZET6), a bus transceiver (PCA82C250), a digital-to-analog converter (DA chip TLV5631) and a display screen (Lcd 12864); the G transmission adjusting module consists of a single chip microcomputer controller (STM32F103ZET6), a bus transceiver (PCA82C250), a digital-to-analog converter (DA chip TLV5631) and a display screen (Lcd 12864); the H main control module consists of a single chip microcomputer controller (STM32F103ZET6), a bus transceiver (PCA82C250), a serial communication chip (ST3232) and a display screen; industrial personal computer (hua IPC-610). The modules are specially designed for a regulation and control system, and components of the modules are purchased from the market and are assembled by self.

With reference to fig. 3, 4, 5, 6, the specific use operations of the invention: firstly, a sintering furnace, a closed forging die and an air cooling control device (self-control equipment) for sintering, forging and air cooling control procedures are organically connected in sequence through a connecting plate and a conveying belt to form a production line; secondly, according to the technical requirements of sintering, forging and air cooling control procedures, determining 1250-1300 ℃ of the temperature in a sintering furnace (see figure 4), 1150-1200 ℃ of the forging temperature of a connecting rod (see figure 5), 150-200 ℃ of a closed forging die (see figure 5), 850-950 ℃ of the temperature at the inlet of an air cooling control device (see figure 6), 510-560 ℃ of the temperature at the outlet of the air cooling control device (see figure 6), and setting a temperature cooling curve for air cooling control; thirdly, respectively connecting a furnace temperature probe A1, a forging temperature probe A2, a die temperature probe A3, a control air cooling inlet temperature probe A4 and a control air cooling outlet temperature probe A5 to the input end of the A temperature sensing module; inputting the five standard temperature parameter set values and the standard temperature cooling curves into the A temperature sensing module and the C human-computer interaction module; and fifthly, starting the regulation and control system to work, wherein the temperature is normal when heating in the sintering process, the temperature automatically flows into the forging process, the temperature (without heating) in the forging process is normal, the temperature automatically flows into the air cooling control process, the temperature (without heating) in the air cooling process is normal, and the temperature cooling curve is in the set curve range, so that the control of each process is qualified, otherwise, the temperature cannot automatically flow into the next process and alarm reminding is performed.

Referring to fig. 5, the closed forging die is based on an open forging die consisting of a lower die holder 1, a lower die 2, an upper die 4 and an upper die holder 5, and a frame 6 matched with the lower die is arranged above the lower die, and mainly plays a role in heat preservation and avoiding forging slag of a connecting rod 3 from flying out from the horizontal direction.

Referring to fig. 3, the working principle of the present invention is: 1. when the temperature sensing module A receives the transmission signals of the temperature probes A1, A2, A3, A4 and A5, the transmission signals are converted, whether the temperature exceeds the set standard temperature range is judged, the result is sent to the human-computer interaction module C and the main control module H, and the main control module performs alarm control, data storage and forwarding. 2. Transmit the information among the A temperature sensing module for B temperature control module through bus transceiver, through the transmission signal conversion back, the temperature is through the controller operation, directly sends the analog control volume to C human-computer interaction module, F fan control module group and G conveying regulation module, if control is unusual, directly notifies D local alarm module and E remote alarm module. 3. And a C man-machine interaction module is utilized, a temperature cooling parameter curve, control parameters and alarm times are set through keys, the process heating temperature and the process waste heat temperature are displayed in real time, and are compared and analyzed with standard temperature setting parameters, so that data processing is performed for subsequent real-time regulation and control. 4. And D, the local alarm module receives the information, automatically analyzes and judges, makes an instruction for starting the alarm module and displays the information of the temperature sensing module A in real time, realizes the real-time monitoring of the field temperature and the alarm of abnormal conditions, receives the alarm information of other modules, and controls and sends the information to the H main control module and the E remote alarm module (including the mobile phones of related personnel). 5. According to on-site monitoring and alarm information, the control quantity of the temperature control module B is received, the F fan control module and the G conveying and adjusting module automatically adjust the transmission belt speed of the air cooling device and the motor rotating speed of the fan through the converter output control frequency converter, real-time regulation and control are carried out, automatic adjustment of process temperature is achieved, and the temperature cooling curve is ensured to be within a set curve range. 6. Each module is monitored and coordinated through the main control module, data are transmitted to the industrial personal computer through the bus transceiver, and the industrial personal computer receives the data and stores the data into a database (SQL).

The invention has the advantages that waste heat and temperature data of powder metallurgy connecting rod processes of various models such as XY-1602, JD-402, HLN-030 and the like are regulated and controlled, the effect is better, and the research purpose is completely achieved.

Claims (2)

1. The utility model provides a regulation and control system that is used for powder metallurgy connecting rod process waste heat which characterized in that: the system comprises a temperature sensing module A, a temperature control module B, a human-computer interaction module C, a local alarm module D, a remote alarm module E, a fan control module F, a transmission regulation module G, a master control module H, an industrial personal computer and a bus transceiver; the structure is as follows: the temperature sensing module A is connected with the temperature control module B, the human-computer interaction module C, the local alarm module D, the remote alarm module E, the fan control module F, the transmission regulation module G and the master control module H are connected with each other through a bus transceiver; each module realizes the function of the module and exchanges data communication with other modules through the bus transceiver; in the use, H master control module and industrial computer are installed at the office, synthesize the regulation and control condition of each module and pass through the display screen report, and all the other modules are all installed at the job site in workshop, through the regulation and control condition of this process of display screen report and each link.

2. The conditioning system for the process waste heat of powder metallurgy connecting rods according to claim 1, wherein: firstly, a sintering furnace, a closed forging die and an air cooling control device for sintering, forging and air cooling control procedures are organically connected in sequence through a connecting plate and a conveying belt to form a production line; secondly, according to the technical requirements of the sintering, forging and air cooling control procedures, determining the temperature in a sintering furnace to be 1250-1300 ℃, the forging temperature of a connecting rod to be 1150-1200 ℃, the temperature of a closed forging die to be 150-200 ℃, the temperature at an inlet of an air cooling control device to be 850-950 ℃, the temperature at an outlet of the air cooling control device to be 510-560 ℃ and setting a temperature cooling curve for air cooling control; thirdly, respectively connecting a furnace temperature probe A1, a forging temperature probe A2, a die temperature probe A3, a control air cooling inlet temperature probe A4 and a control air cooling outlet temperature probe A5 to the input end of the A temperature sensing module; inputting the five standard temperature parameter set values and the standard temperature cooling curves into the A temperature sensing module and the C human-computer interaction module; and fifthly, starting the regulation and control system to work, wherein the temperature is normal when heating in the sintering process, the temperature automatically flows into the forging process, the temperature in the forging process is normal, the temperature automatically flows into the air cooling control process, the temperature normal and temperature cooling curves in the air cooling process are controlled within a set curve range, the control of each process is qualified, and otherwise, the temperature cannot automatically flow into the next process and alarm reminding is performed.

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