Temperature control system and temperature control method for kinematic pair of press transmission system

Abstract

The invention relates to a temperature control system and a temperature control method for a kinematic pair of a press transmission system in the technical field of presses, and the temperature control system for the kinematic pair of the press transmission system is characterized in that according to the kinematic pair of the press transmission system, a temperature measuring point is arranged at a transmission part which is easy to heat; an infrared thermometer is arranged on a press machine cross beam corresponding to a temperature measuring point and used for directly detecting the temperature of the measuring point, the infrared thermometer is fixed on the press machine cross beam through a mounting support and connected with a programmable logic controller (PLC), and the PLC is further connected with an output display terminal and an overheat alarm. According to the temperature control system for the kinematic pair of the press transmission system, the infrared thermometer for indirectly measuring the temperature is in control connection with the PLC and the lubricating system, so that it is ensured that a transmission part is within a controllable and safe temperature range, and automatic coordination control over the temperature of the transmission part and the lubricating system is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of presses, and in particular to a temperature control system and a temperature control method for a kinematic pair of a press transmission system. Background Art

[0002] During the use of a press, as the number of strokes increases, the overall requirements for the press are increased, and the efficiency requirements for the press are also getting higher and higher. As the number of strokes increases, the transmission parts such as pins, bearings and sleeves in the moving parts of the press transmission system are accompanied by problems such as wear and foreign matter. Sometimes the temperature rise is too high, causing damage to the press transmission parts or even scrapping. However, the temperature monitoring of the various transmission parts of the existing press is not comprehensive. The temperature measuring components are too close to the temperature point and are easily affected by lubricating oil and cause deviations. Moreover, the temperature measurement system and the lubrication and cooling system are independent of each other and cannot automatically adjust the lubrication system according to the temperature rise. Human intervention or regular inspections are required. This temperature measurement method cannot easily and quickly detect the temperature of the moving parts of the transmission system, nor can it detect transmission anomalies and temperature rise anomalies. Summary of the Invention

[0003] Aiming at the problems existing in the prior art in the temperature detection and control of the moving pairs of a press transmission system, the present invention provides a temperature control system for the moving pairs of a press transmission system. By setting a temperature measuring component at the far end of the gap, real-time temperature monitoring, display output and overheating alarm are performed.

[0004] The object of the present invention is achieved in this way. A temperature control system for the kinematic pair of a press transmission system is characterized in that, according to the kinematic pair of the press transmission system, a temperature measuring point is set at a transmission part that is prone to temperature rise, and an infrared thermometer is set on the press beam corresponding to the temperature measuring point for direct measurement point temperature detection. The infrared thermometer is fixed to the press beam through a mounting bracket, and the infrared thermometer is connected to a PLC controller. The PLC controller is also connected to an output display terminal and an overheating alarm.

[0005] In order to further facilitate the adaptation and adjustment of the corresponding lubrication branches according to temperature changes, the PLC controller is connected to the lubrication control system signal to control and adjust the flow of each lubrication branch.

[0006] For accurate temperature measurement, there is no obstruction between the temperature measuring point and the corresponding infrared thermometer, and a detection through hole is provided at the beam position corresponding to the straight line between the beam infrared thermometer and the temperature measuring point.

[0007] To facilitate the installation of the infrared thermometer, the mounting bracket includes a U-shaped mounting plate, which includes two parallel side plates and a bottom plate perpendicular to the side plates. The bottom plate is connected to an L-shaped mounting plate for fixing the infrared thermometer. The L-shaped mounting plate is provided with mounting holes. The part where one end of the two side plates of the U-shaped mounting plate is connected to the crossbeam is provided with a folded edge folded outward, and the folded edge is provided with a connecting hole.

[0008] To facilitate the adaptation and coordination of the lubrication system and the temperature measurement system, the lubrication control system includes a regulating valve and a main distributor which are connected to the lubrication oil supply pipeline in sequence. The main distributor includes several distributor modules which are respectively connected to each lubrication support. The distributor module is connected to the PLC controller signal and is used to control the lubricating oil flow of each corresponding lubrication branch according to the temperature changes of each temperature measuring point; each lubrication branch is connected with a one-way valve, and the pipeline between the regulating valve and the distributor module is connected with a ball valve and a pressure gauge.

[0009] The temperature control system of the kinematic pair of the press transmission system of the present invention sets a temperature measuring point at the transmission part, and sets an infrared thermometer at a position convenient for installation to perform non-contact temperature monitoring, which is convenient for protective treatment of the thermometer and ensures that the thermometer is in a relatively clean space, avoids the contact temperature measuring components from being easily contaminated or damaged by oil mist, and reduces the layout of internal wiring; the infrared thermometer is connected to the PLC controller and the lubrication system control, which is convenient for temperature monitoring and adjusts the lubrication parameters according to temperature changes to ensure that the transmission part is within a controllable and safe temperature range, thereby realizing automatic coordinated control of the transmission part temperature and the lubrication system.

[0010] To further achieve the adaptive coordination of the temperature monitoring of the kinematic pair of the transmission system and the moisturizing system of the present invention, the present invention also provides a temperature control method for the kinematic pair of the transmission system of a press machine, characterized by comprising the following steps: Initial lubrication and temperature control process: After the machine is started, the initial lubrication system starts, and the lubrication flow rate is controlled by the distributor module signal to supply oil to the lubrication branches of each transmission component to perform initial lubrication and temperature control; Temperature detection process: The PLC controller collects the temperature signals of the infrared thermometer corresponding to each temperature measuring point in real time, processes and compares the data. When the real-time collected temperature is lower than the preset temperature value T1, it indicates that the friction and lubrication and cooling systems of each transmission part are normal, and lubrication and temperature control continue according to the predetermined initial lubrication plan; When the real-time collected temperature signal is greater than T1 and less than T2, a signal is sent to the main distributor. The distributor module corresponding to the temperature measurement point increases the oil supply flow of the lubrication branch, accelerates the cooling speed, and maintains the adjusted flow rate for continuous oil supply and lubrication. When the real-time collected temperature signal is greater than T2, the PLC controller will send out an overheating alarm signal and shut down the machine for maintenance; Temperature and lubrication system output process: Each infrared thermometer and distributor module transmits the temperature data of each temperature measuring point and the oil supply flow data of each lubrication branch to the display screen in real time, and displays the output in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematic diagram of the temperature control system implementation scheme of the press transmission system kinematic pair of the present invention Figure 1 .

[0012] Figure 2 Schematic diagram of the temperature control system implementation scheme of the press transmission system kinematic pair of the present invention Figure 2 .

[0013] Figure 3 Schematic diagram of the temperature control system implementation scheme of the press transmission system kinematic pair of the present invention Figure 3 .

[0014] Figure 4 Schematic diagram of a U-shaped mounting plate for a mounting bracket of an infrared thermometer.

[0015] Figure 5 This is a schematic diagram of the temperature control method of the kinematic pair of the press transmission system of the present invention.

[0016] Among them, 1 U-shaped mounting plate; 2 L-shaped mounting plate; 3 crossbeam; 301 detection through hole; 4-10 infrared thermometer; 11 main distributor; 12 regulating valve; 13 ball valve; 14 pressure gauge; 15 regulating valve. DETAILED DESCRIPTION Example 1

[0017] like Figure 1-Figure 5The figure shows an embodiment of the temperature control system for the kinematic pair of a press drive system according to the present invention, applied to a crankshaft press drive system. In this press drive system, a flywheel drives the main drive shaft in high-speed rotation. After prolonged use, the front and rear bearings mounted on the main drive shaft wear out, causing the gap between the main drive shaft supports to widen and wobble, raising the temperatures of the front and rear bearings. The temperature measurement point on the front bearing of the main drive shaft is aligned with the front sleeve of the crossbeam main drive shaft, detecting the temperature transmitted from the bearing to the front sleeve of the crossbeam main drive shaft through the front support sleeve. The temperature measurement point on the rear bearing of the main drive shaft is aligned with the rear sleeve of the crossbeam main drive shaft to detect the temperature transferred from the bearing to the rear sleeve of the crossbeam main drive shaft through the unloading sleeve. The gear of the main drive shaft drives the left intermediate large gear mounted on the left intermediate shaft to rotate. The left intermediate large gear and the small gear of the left intermediate shaft rotate together, driving the left eccentric gear to rotate. The left intermediate large gear drives the right intermediate large gear to rotate. The right intermediate large gear and the small gear of the right intermediate shaft rotate together, driving the right eccentric gear to rotate. The eccentric gear is fixed to the core shaft and drives the upper tie rod, angular rocker, crank connecting rod, lower tie rod, and slider connecting rod to rotate. The upper tie rod, crank connecting rod, and core shaft are prone to heat. The temperature measurement point on the connecting rod is aligned with the outer surface of the crank connecting rod to detect the temperature transferred from the upper tie rod, crank connecting rod, and core shaft to the outer surface of the crank connecting rod. The lower tie rod and the lower end of the crank connecting rod are prone to heat. The temperature measurement point on the connecting rod pin is aligned with the outer surface of the connecting rod pin to detect the temperature transferred from the lower tie rod and the lower end of the crank connecting rod to the outer surface of the connecting rod pin.

[0018] Temperature measuring points A, B, C, D, E, F, G, H, I, and J are set at corresponding positions according to the heat-prone parts of the moving pairs of the above-mentioned transmission system, and infrared thermometers are installed at corresponding positions or horizontal positions of the press beam or the corresponding temperature measuring points, and the temperature of the measuring points is detected by non-contact infrared temperature measurement.

[0019] like Figure 1 and Figure 4 As shown, in this embodiment, the mounting bracket for mounting an external thermometer includes a U-shaped mounting plate 1 and an L-shaped mounting plate 2. The U-shaped mounting plate 1 includes two parallel side plates and a bottom plate perpendicular to the side plates. The bottom plate is connected to the L-shaped mounting plate 2 for fixing the infrared thermometer. The connection between the L-shaped mounting plate 2 and the bottom plate of the U-shaped mounting plate 1 is provided with mounting holes for bolting the two. The connection between one end of the two side plates of the U-shaped mounting plate 1 and the crossbeam 3 is provided with a folded edge folded outward, and the folded edge is provided with a connection hole for bolting to the crossbeam. For infrared temperature measurement, there is no obstruction between the temperature measurement point and the corresponding infrared thermometer. Therefore, a detection through hole 301 is provided on the crossbeam 3 at the position of the crossbeam corresponding to the infrared thermometer and the temperature measurement point to facilitate the passage of the infrared detection line.

[0020] To facilitate temperature monitoring and control, an infrared thermometer is connected to a PLC controller, which is also connected to an output display terminal and an overheat alarm. To further facilitate adaptive adjustment of the corresponding lubrication branches based on temperature changes, the PLC controller is connected to the lubrication control system signal to control the flow rate of each lubrication branch.

[0021] In order to facilitate the adaptation and coordination of the lubrication system and the temperature measurement system in this embodiment, the lubrication control system includes a regulating valve 12 and a main distributor 11 which are connected to the lubrication oil supply pipeline in sequence. The main distributor 11 includes several distributor modules which are respectively connected to each lubrication support. The distributor module is connected to the PLC controller signal and is used to control the lubricating oil flow of each corresponding lubrication branch according to the temperature change of each temperature measuring point; a one-way valve 15 is connected to each lubrication branch, and a ball valve 13 and a pressure gauge 14 are connected to the pipeline between the regulating valve 12 and the main distributor.

[0022] The temperature control system of the moving pair of the press transmission system of this embodiment sets a temperature measuring point at the transmission part, and sets an infrared thermometer at a convenient installation position for non-contact temperature monitoring, which is convenient for protective treatment of the thermometer and ensures that the thermometer is in a relatively clean space, avoids the contact temperature measuring components from being easily contaminated or damaged by oil mist, and reduces the layout of internal wiring; the infrared thermometer is connected to the PLC controller and the lubrication system control, which is convenient for temperature monitoring and adjusts the lubrication parameters according to temperature changes to ensure that the transmission part is within a controllable and safe temperature range, thereby realizing automatic coordinated control of the transmission part temperature and the lubrication system. Example 2

[0023] The temperature control method of the press transmission system moving pair of this embodiment, based on the temperature control system of the press transmission system moving pair of embodiment 1, includes the following process: Initial lubrication and temperature control process: After the machine is started, the initial lubrication system starts, and the lubrication flow rate is controlled by the distributor module signal to supply oil to the lubrication branches of each transmission component to perform initial lubrication and temperature control; Temperature detection process: When the press is in motion, the PLC controller collects the temperature signal of the infrared thermometer corresponding to each temperature measuring point in real time, processes and compares the data with the predetermined temperature, and makes comparisons and judgments in the following three situations: The first case: When the real-time collected temperature is lower than the preset temperature value T1, it indicates that the friction and lubrication and cooling systems of each transmission part are normal, and lubrication and temperature control continue according to the predetermined initial lubrication plan; The second situation: when the real-time collected temperature signal is greater than T1 and less than T2, a signal is sent to the main distributor 11, and the distributor module corresponding to the temperature measurement point increases the oil supply flow of the lubrication branch, accelerates the cooling rate, and maintains the adjusted flow rate for continuous oil supply and lubrication; the aforementioned initial temperature is generally preset at the factory based on the tonnage and working conditions of the press. After the press has been used for a period of time, the preset temperature can be adjusted within a certain range as it is used and worn; In the third case, when the real-time collected temperature signal is greater than T2, the PLC controller sends out an overheat alarm signal, and the alarm sounds an alarm. At the same time, the corresponding temperature measurement point on the display screen at the output end is displayed with a signal light flashing or beeping to clearly indicate the alarm location, so as to facilitate shutdown and maintenance. Temperature and lubrication system output process: Each infrared thermometer and distributor module transmits the temperature data of each temperature measuring point and the oil supply flow data of each lubrication branch to the display screen in real time, and displays the output in real time.

Claims

1. A temperature control system for a kinematic pair of a press transmission system, characterized in that: According to the distribution of moving parts of the press transmission system, temperature measuring points are set at the transmission parts that are prone to temperature rise, and infrared thermometers are set on the press beam corresponding to the temperature measuring points for direct measurement of point temperature detection. The infrared thermometer is fixed to the press beam through a mounting bracket. The infrared thermometer is connected to the PLC controller, and the PLC controller is also connected to an output display terminal and an overheating alarm.

2. The temperature detection system for the kinematic pair of a press transmission system according to claim 1, characterized in that: The PLC controller is connected to the lubrication control system signal and is used to control and adjust the flow of each lubrication branch.

3. The temperature detection system for the kinematic pair of a press transmission system according to claim 1, characterized in that: There is no obstruction between the temperature measuring point and the corresponding infrared thermometer, and a detection through hole is provided at the beam position corresponding to the straight line between the beam infrared thermometer and the temperature measuring point.

4. The temperature detection system for the kinematic pair of a press transmission system according to claim 1, characterized in that: The mounting bracket includes a U-shaped mounting plate, which includes two parallel side plates and a bottom plate perpendicular to the side plates. The bottom plate is connected to an L-shaped mounting plate for fixing the infrared thermometer. The L-shaped mounting plate is provided with mounting holes. The part where one end of the two side plates of the U-shaped mounting plate is connected to the crossbeam is provided with a folded edge folded outward, and the folded edge is provided with a connecting hole.

5. The temperature detection system for the kinematic pair of a press transmission system according to claim 1, characterized in that: The lubrication control system includes a regulating valve and a main distributor which are connected to the lubrication oil supply pipeline in sequence. The main distributor includes several distributor modules which are respectively connected to each lubrication support. The distributor module is connected to the PLC controller signal and is used to control the lubricating oil flow of each corresponding lubrication branch according to the temperature changes of each temperature measuring point; each lubrication branch is connected to a one-way valve, and a ball valve and a pressure gauge are connected to the pipeline between the regulating valve and the distributor module.

6. The temperature control method of the kinematic pair of a press transmission system according to any one of claims 1 to 5, characterized in that: The process includes the following: Initial lubrication and temperature control process: After the machine is started, the initial lubrication system starts, and the lubrication flow rate is controlled by the distributor module signal to supply oil to the lubrication branches of each transmission component to perform initial lubrication and temperature control; Temperature detection process: The PLC controller collects the temperature signals of the infrared thermometer corresponding to each temperature measuring point in real time, performs digital processing and comparison. When the real-time collected temperature is lower than the preset temperature value T1, it indicates that the friction and lubrication and cooling systems of each transmission part are normal, and lubrication and temperature control continue according to the predetermined initial lubrication plan; When the real-time collected temperature signal is greater than T1 and less than T2, a signal is sent to the main distributor. The distributor module corresponding to the temperature measurement point increases the oil supply flow of the lubrication branch, accelerates the cooling speed, and maintains the adjusted flow rate for continuous oil supply and lubrication. When the real-time collected temperature signal is greater than T2, the PLC controller will send out an overheating alarm signal and shut down the machine for maintenance; Temperature and lubrication system output process: Each infrared thermometer and distributor module transmits the temperature data of each temperature measuring point and the oil supply flow data of each lubrication branch to the display screen in real time, and displays the output in real time.

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