阅读说明：本技术 一种淬火压床淬火腔油流量监测系统及方法 (System and method for monitoring oil flow of quenching cavity of quenching press ) 是由 段志芹 杜君 周承莹 于 2021-08-31 设计创作，主要内容包括：本发明涉及一种淬火压床淬火腔油流量监测系统及方法。系统包括：油流传感器、信号处理器及控制器；油流传感器设置在淬火腔的溢油口；油流传感器与信号处理器电性连接；信号处理器与控制器电性连接。方法包括：持续探测淬火腔的溢油口的油流信号；将油流信号拟合生成对应的流速；比较该流速与流速参考值的大小,如果该流速大于或等于流速参考值则输出流量监测正常信号,否则输出流量监测异常信号。如果淬火压床启动后的第一时间内,未检测到流量监测正常信号,则判定淬火腔油流量异常；如果超过第二时间未检测到流量监测正常信号,则判定淬火腔油流量异常。本发明提供的淬火压床淬火腔油流量的监测系统,实现了对淬火压床淬火腔油流量的准确监测。(The invention relates to a system and a method for monitoring oil flow of a quenching cavity of a quenching press. The system comprises: the oil flow sensor, the signal processor and the controller; the oil flow sensor is arranged at an oil overflow port of the quenching cavity; the oil flow sensor is electrically connected with the signal processor; the signal processor is electrically connected with the controller. The method comprises the following steps: continuously detecting an oil flow signal of an oil overflow port of the quenching cavity; fitting the oil flow signal to generate a corresponding flow rate; and comparing the flow rate with the flow rate reference value, outputting a normal flow monitoring signal if the flow rate is greater than or equal to the flow rate reference value, and otherwise outputting an abnormal flow monitoring signal. If the normal flow monitoring signal is not detected within the first time after the quenching press is started, judging that the oil flow of the quenching cavity is abnormal; and if the flow monitoring normal signal is not detected beyond the second time, judging that the oil flow of the quenching cavity is abnormal. The system for monitoring the oil flow of the quenching cavity of the quenching press provided by the invention realizes accurate monitoring of the oil flow of the quenching cavity of the quenching press.)

1. A monitoring system of quenching chamber oil flow of quenching press is characterized by comprising: the oil flow sensor, the signal processor and the controller;

the oil flow sensor is arranged at an oil overflow port of the quenching cavity and is used for continuously detecting an oil flow signal of the oil overflow port of the quenching cavity;

the oil flow sensor is electrically connected with the signal processor, and a flow rate reference value and a function model between the flow rate and the oil flow signal are set in the signal processor; acquiring an oil flow signal from the oil flow sensor, and fitting to generate a flow rate value corresponding to the oil flow signal; comparing the flow velocity value with the flow velocity reference value, outputting a normal flow monitoring signal if the flow velocity value is greater than or equal to the flow velocity reference value, and outputting an abnormal flow monitoring signal if the flow velocity value is less than the flow velocity reference value;

the signal processor is electrically connected with the controller; the controller sets a first time and a second time, and if the flow monitoring normal signal is not detected in the first time after the quenching press is started, the abnormal flow of the oil in the quenching cavity is judged; and if the flow monitoring normal signal is not detected within the second time, judging that the oil flow of the quenching cavity is abnormal.

2. The system for monitoring oil flow to a quench chamber of a quench press of claim 1 wherein the signal processor comprises:

a first signal acquisition unit for acquiring an oil flow signal from the oil flow sensor;

the flow velocity calibration unit is used for setting the maximum oil injection quantity and the minimum oil injection quantity of the equipment, and calibrating the maximum flow velocity corresponding to the maximum oil injection quantity and the minimum flow velocity corresponding to the minimum oil injection quantity; establishing a function model between the flow rate and the oil flow signal; acquiring an oil flow signal from the oil flow sensor, and calculating a flow rate value corresponding to the oil flow signal through the function model;

and the signal processing unit is used for setting a flow speed reference value, comparing the flow speed value with the flow speed reference value, outputting a normal flow monitoring signal if the flow speed is greater than or equal to the flow speed reference value, and outputting an abnormal flow monitoring signal if the flow speed is less than the flow speed reference value.

3. The system for monitoring oil flow to a quench chamber of a quench press of claim 2 wherein the controller comprises:

the second signal acquisition unit acquires a normal flow monitoring signal and an abnormal flow monitoring signal from the signal processing unit;

the timing unit is used for starting timing after the quenching press is started;

the judging unit is used for setting a first time and a second time, and judging that the oil flow of the quenching cavity is abnormal if a normal flow monitoring signal is not detected within the first time after the quenching press is started; and if the flow monitoring normal signal is not detected beyond the second time, judging that the oil flow of the quenching cavity is abnormal.

4. The system for monitoring the oil flow of the quenching chamber of the quenching press as claimed in claim 1, further comprising: an alarm device; the controller is electrically connected with the alarm device; and when the controller judges that the oil flow of the quenching cavity is abnormal, the alarm device is triggered.

5. The system for monitoring the oil flow of the quenching cavity of the quenching press machine as claimed in claim 1, wherein the tail end of the oil spilling port of the quenching cavity is provided with a through hole; the oil flow sensor is installed in the through hole, and the inner end of the oil flow sensor exceeds the inner wall of the oil overflow port.

6. The system for monitoring the oil flow of the quenching cavity of the quenching press machine as claimed in claim 3, wherein the through hole has a specification of phi 10; the inner end of the oil flow sensor exceeds the inner wall of the oil overflow port by 5 mm.

7. The system for monitoring the oil flow of the quenching chamber of the quenching press according to any one of claims 1 to 6, wherein the oil flow sensor is a thermal oil flow sensor; the controller is a PLC controller.

8. A method for monitoring oil flow of a quenching cavity of a quenching press is characterized by comprising the following steps:

continuously detecting an oil flow signal of an oil overflow port of the quenching cavity;

setting a flow speed reference value; fitting the oil flow signal to generate a corresponding flow rate; comparing the flow rate with a flow rate reference value, outputting a normal flow monitoring signal if the flow rate is greater than or equal to the flow rate reference value, and outputting an abnormal flow monitoring signal if the flow rate is less than the flow rate reference value;

setting a first time and a second time; if the normal flow monitoring signal is not detected within the first time after the quenching press is started, judging that the oil flow of the quenching cavity is abnormal; and if the flow monitoring normal signal is not detected within the second time, judging that the oil flow of the quenching cavity is abnormal.

9. The method for monitoring the oil flow of the quenching chamber of the quenching press as claimed in claim 8, wherein the first time is 10-20 s; the second time is 8-12 s.

Technical Field

The invention relates to the technical field of machine manufacturing, in particular to a system and a method for monitoring oil flow of a quenching cavity of a quenching press.

Background

With the progress of science and technology, the driven bevel gear needs to be quenched in a quenching press machine in the automobile manufacturing process. The oil flow of the quenching press is an important parameter in the quenching process. The oil flow of the outlet of the oil pump is continuously controllable, and the traditional oil flow control method is characterized in that a flow detection sensor is only additionally arranged at the outlet of the quenching oil pump to monitor the flow. However, in the actual quenching process, the quenching quality problem of heat treatment is easily caused because the oil flow of the quenching cavity is not consistent with the oil flow of the oil pump due to the leakage of an oil pipeline on quenching oil or the untight sealing of the quenching cavity.

The driven wheel precision cooling technology independently developed by Dongfeng Dener company has high requirement on the flow of quenching oil, if the oil flow of a quenching oil cavity of a quenching press is insufficient, the quenching of parts is poor, particularly, the surface hardness of the parts is high, and the problem of poor quenching of subsurface layers and core parts is more serious. The insufficient oil flow of the quenching cavity can not be directly identified on site, so that the monitoring and the judgment of the normal oil flow of the quenching cavity are particularly important.

Disclosure of Invention

The invention provides a system and a method for monitoring the oil flow of a quenching cavity of a quenching press, aiming at the technical problem that whether the oil flow of the quenching cavity of the quenching press is normal or not is difficult to accurately monitor in the prior art.

The technical scheme for solving the technical problems is as follows:

a system for monitoring oil flow of a quenching chamber of a quenching press comprises: the oil flow sensor, the signal processor and the controller;

the oil flow sensor is arranged at an oil overflow port of the quenching cavity and is used for continuously detecting an oil flow signal of the oil overflow port of the quenching cavity;

the oil flow sensor is electrically connected with the signal processor, and a flow rate reference value and a function model between the flow rate and the oil flow signal are set in the signal processor; acquiring an oil flow signal from the oil flow sensor, and fitting to generate a flow rate value corresponding to the oil flow signal; comparing the flow velocity value with the flow velocity reference value, outputting a normal flow monitoring signal if the flow velocity value is greater than or equal to the flow velocity reference value, and outputting an abnormal flow monitoring signal if the flow velocity value is less than the flow velocity reference value;

the signal processor is electrically connected with the controller; the controller sets a first time and a second time, and if the flow monitoring normal signal is not detected in the first time after the quenching press is started, the abnormal flow of the oil in the quenching cavity is judged; and if the flow monitoring normal signal is not detected within the second time, judging that the oil flow of the quenching cavity is abnormal.

Further, the signal processor includes:

a first signal acquisition unit for acquiring an oil flow signal from the oil flow sensor;

the flow velocity calibration unit is used for setting the maximum oil injection quantity and the minimum oil injection quantity of the equipment, and calibrating the maximum flow velocity corresponding to the maximum oil injection quantity and the minimum flow velocity corresponding to the minimum oil injection quantity; establishing a function model between the flow rate and the oil flow signal; acquiring an oil flow signal from the oil flow sensor, and calculating a flow rate value corresponding to the oil flow signal through the function model;

and the signal processing unit is used for setting a flow speed reference value, comparing the flow speed value with the flow speed reference value, outputting a normal flow monitoring signal if the flow speed is greater than or equal to the flow speed reference value, and outputting an abnormal flow monitoring signal if the flow speed is less than the flow speed reference value.

Further, the controller includes:

the second signal acquisition unit acquires a normal flow monitoring signal or an abnormal flow monitoring signal from the signal processing unit;

the timing unit is used for starting timing after the quenching press is started;

the judging unit is used for setting a first time and a second time, and judging that the oil flow of the quenching cavity is abnormal if a normal flow monitoring signal is not detected within the first time after the quenching press is started; and if the flow monitoring normal signal is not detected beyond the second time, judging that the oil flow of the quenching cavity is abnormal.

Further, the method also comprises the following steps: an alarm device; the controller is electrically connected with the alarm device; and when the controller judges that the oil flow of the quenching cavity is abnormal, the alarm device is triggered.

Furthermore, the tail end of an oil spilling port of the quenching cavity is provided with a through hole; the oil flow sensor is installed in the through hole, and the inner end of the oil flow sensor exceeds the inner wall of the oil overflow port.

Further, the specification of the through hole is phi 10; the inner end of the oil flow sensor exceeds the inner wall of the oil overflow port by 5 mm.

Further, the oil flow sensor is a thermal oil flow sensor; the controller is a PLC controller.

The invention also provides a method for monitoring the oil flow of the quenching cavity of the quenching press, which comprises the following steps:

continuously detecting an oil flow signal of an oil overflow port of the quenching cavity;

setting a flow speed reference value; fitting the oil flow signal to generate a corresponding flow rate; comparing the flow rate with a flow rate reference value, outputting a normal flow monitoring signal if the flow rate is greater than or equal to the flow rate reference value, and outputting an abnormal flow monitoring signal if the flow rate is less than the flow rate reference value;

setting a first time and a second time; if the normal flow monitoring signal is not detected within the first time after the quenching press is started, judging that the oil flow of the quenching cavity is abnormal; and if the flow monitoring normal signal is not detected within the second time, judging that the oil flow of the quenching cavity is abnormal.

Further, the first time is 10-20 s; the second time is 8-12 s.

The monitoring system for the oil flow of the quenching cavity of the quenching press provided by the invention at least has the following beneficial effects or advantages:

according to the system and the method for monitoring the oil flow of the quenching cavity of the quenching press, whether the oil overflow port of the quenching cavity has normal oil flow or not is monitored in a flow velocity monitoring mode in the first time when the oil flow is larger after the quenching press is started, and whether the oil flow in the quenching cavity is normal or not can be accurately judged; in the working process of the quenching press, whether the oil overflow port of the quenching cavity has normal oil flow or not is continuously monitored in a flow velocity monitoring mode under the condition that the oil flow tends to be stable, and whether the oil flow in the quenching cavity is normal or not can be monitored. The system and the method for monitoring the oil flow of the quenching cavity of the quenching press provided by the invention realize accurate monitoring of the oil flow of the quenching cavity of the quenching press and ensure the quenching quality of parts.

Drawings

FIG. 1 is a schematic structural diagram of a system for monitoring oil flow in a quenching chamber of a quenching press according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a signal processor and a controller according to an embodiment of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

the method comprises the following steps of 1-a quenching cavity, 2-an oil overflow port, 3-an oil flow sensor, 4-a signal processor, 41-a first signal acquisition unit, 42-a flow rate calibration unit, 43-a signal processing unit, 5-a controller, 51-a second signal acquisition unit, 52-a timing unit, 53-a determination unit and 6-an alarm device.

Detailed Description

The invention provides a system and a method for monitoring the oil flow of a quenching cavity of a quenching press, aiming at the technical problem that whether the oil flow of the quenching cavity of the quenching press is normal or not is difficult to accurately monitor in the prior art.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that terms such as "upper", "lower", "front", "rear", "left", "right", and the like in the embodiments indicate terms of orientation, and are used only for simplifying the positional relationship based on the drawings of the specification, and do not represent that the elements, devices, and the like indicated in the description must operate according to the specific orientation and the defined operation, method, and configuration, and such terms are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; may be directly connected or indirectly connected through an intermediate. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.

Example one

Referring to fig. 1, an embodiment of the invention discloses a system for monitoring oil flow of a quenching chamber of a quenching press, which mainly comprises: an oil flow sensor 3, a signal processor 4, and a controller 5. Wherein the oil flow sensor 3 adopts a thermal flow rate sensor, such as a Turke FCS-G1/4A4-NA/D100 sensor; the signal processor 4 may employ a kerk FM-IM-3UP63X signal processor; the controller 5 is a PLC controller, such as a siemens PLC controller.

The oil flow sensor 3 is arranged at the oil overflow port 2 of the quenching cavity 1; specifically, the tail end of an oil overflow port 2 of the quenching cavity 1 is provided with a through hole, the specification of the through hole is phi 10, and an oil flow sensor 3 is arranged in the through hole; the inner end of the oil flow sensor 3 exceeds the inner wall of the oil overflow port 2 by 5mm, so that the quenching oil flowing out of the oil overflow port 2 of the quenching cavity 1 reliably passes through a probe of the oil flow sensor 3; the larger the oil flow entering the quenching cavity 1 is, the higher the quenching oil outflow speed of the oil spilling port 2 is.

The oil flow sensor 3 is used for continuously detecting an oil flow signal of the oil overflow port 2 of the quenching chamber 1, and the oil flow signal is an analog quantity. The oil flow sensor 3 is electrically connected to the signal processor 4, and the connection manner may be wired connection or wireless connection. The signal processor 4 is internally provided with a flow rate reference value, the flow rate reference value is a reference value for judging whether the flow rate is normal, and the flow rate reference value is between the maximum flow rate and the minimum flow rate and can be set as required. The signal processor 4 is also provided with a function model between the flow rate and the oil flow signal, which can be processed from historical and empirical data. In the working process, the signal processor 4 acquires the oil flow signal from the oil flow sensor 3, and generates a flow rate value corresponding to the oil flow signal through function model fitting. And comparing the flow rate value with the flow rate reference value, outputting a normal flow monitoring signal if the flow rate value is greater than or equal to the flow rate reference value, and outputting an abnormal flow monitoring signal if the flow rate value is less than the flow rate reference value.

The signal processor 4 is electrically connected to the controller 5 in a wired or wireless manner. The controller 5 sets a first time and a second time, wherein the first time is used for monitoring the oil flow of a first section after the quenching press is started, and the second time is used for continuously monitoring the oil flow. If the normal flow monitoring signal is not detected within the first time after the quenching press is started, the situation that oil leakage exists in the quenching cavity 1 is indicated at the moment, and the abnormal oil flow of the quenching cavity 1 is judged; if the normal flow monitoring signal is not detected within the second time, the condition that oil leakage exists in the quenching cavity 1 is also indicated at the moment, and the abnormal oil flow of the quenching cavity 1 is judged.

To facilitate a further understanding of the present invention, the signal processor 4 and the controller 5 are further described below:

referring to fig. 2, the signal processor 4 includes: a first signal acquisition unit 41, a flow rate calibration unit 42 and a signal processing unit 43. The first signal collecting unit 41 is used to acquire an oil flow signal from the oil flow sensor 3. The flow rate calibration unit 42 is configured to set a maximum fuel injection amount and a minimum fuel injection amount of the device, and calibrate a maximum flow rate corresponding to the maximum fuel injection amount and a minimum flow rate corresponding to the minimum fuel injection amount; establishing a function model between the flow rate and the oil flow signal; an oil flow signal is acquired from the oil flow sensor 3, and a flow rate value corresponding to the oil flow signal is calculated by the function model. The signal processing unit 43 is used for setting a flow rate reference value; and comparing the flow rate value with the flow rate reference value, outputting a normal flow monitoring signal if the flow rate is greater than or equal to the flow rate reference value, and outputting an abnormal flow monitoring signal if the flow rate is less than the flow rate reference value.

With further reference to fig. 2, the controller 5 comprises: a second signal acquisition unit 51, a timing unit 52 and a decision unit 53. The second signal acquiring unit 51 is configured to acquire a normal flow monitoring signal or an abnormal flow monitoring signal from the signal processing unit 43. The timing unit 52 is used for starting timing after the quenching press is started. The determination unit 53 is configured to set a first time (for example, the first time may be set to 10-20s) for monitoring the oil flow rate in a first period after the quenching press is turned on, and set a second time (for example, the second time may be set to 8-12s) for continuously monitoring the oil flow rate. If the normal flow monitoring signal is not detected within the first time after the quenching press is started, judging that the oil flow of the quenching cavity 1 is abnormal; and if the flow monitoring normal signal is not detected beyond the second time, judging that the oil flow of the quenching cavity 1 is abnormal.

When the oil flow of the quenching cavity 1 is abnormal, workers need to be reminded to process the oil flow in time, so that the embodiment of the invention is also provided with the following steps: an alarm device 6; the alarm device 6 may take the form of an alarm in the form of a sound, light or vibration. The controller 5 is electrically connected with the alarm device 6 in a wired or wireless connection mode; when the controller 5 judges that the oil flow of the quenching cavity 1 is abnormal, the controller 5 triggers the alarm device 6 to be started.

Example two

Referring to fig. 1, an embodiment of the present invention further provides a method for monitoring oil flow of a quenching chamber of a quenching press, where the method is implemented based on a system for monitoring oil flow of a quenching chamber of a quenching press in the first embodiment, and the method specifically includes the following steps:

and S10, continuously detecting an oil flow signal of the oil overflow port 2 of the quenching cavity 1.

Specifically, an oil flow sensor 3 is used to continuously detect an oil flow signal of an oil overflow port 2 of the quenching chamber 1, and the oil flow signal is an analog quantity.

S20, setting a flow speed reference value; fitting the oil flow signal to generate a corresponding flow rate; and comparing the flow rate with a flow rate reference value, outputting a normal flow monitoring signal if the flow rate is greater than or equal to the flow rate reference value, and outputting an abnormal flow monitoring signal if the flow rate is less than the flow rate reference value.

In practical applications, the flow rate reference value is set to be slightly greater than the calibrated minimum flow rate. And fitting the oil flow signal into a function model between the flow rate and the oil flow signal, and calculating to obtain the corresponding flow rate. If the flow rate is greater than or equal to the reference flow rate, which indicates that oil flow is generated at the oil overflow port 2 of the quenching chamber 1, a normal flow monitoring signal is output. If the flow rate is smaller than the flow rate, outputting a flow monitoring abnormal signal by the reference value, wherein the flow monitoring abnormal signal indicates that no oil flow is generated at the oil overflow port 2 of the quenching cavity 1 at the moment, and outputting the flow monitoring abnormal signal.

S30, setting a first time and a second time; if the normal flow monitoring signal is not detected within the first time after the quenching press is started, judging that the oil flow of the quenching cavity 1 is abnormal; and if the flow monitoring normal signal is not detected beyond the second time, judging that the oil flow of the quenching cavity 1 is abnormal.

Wherein, if the oil flow in the time period is relatively large in the first time (for example, within 10 s) after the quenching press is started, if the normal flow monitoring signal is not detected in the first time, it indicates that the quenching chamber 1 leaks to a certain extent, and the oil flow does not reach the oil overflow port 2 of the quenching chamber 1 in the specified time, and it can be determined that the oil flow in the quenching chamber 1 is abnormal. If the flow monitoring normal signal is not detected within the second time (such as 20s), the flow breaking occurs at the oil spilling port 2 of the quenching cavity 1, and the abnormal oil flow of the quenching cavity 1 can be judged.

The monitoring system for the quenching cavity oil flow of the quenching press provided by the embodiment of the invention at least has the following beneficial effects or advantages:

according to the monitoring system for the oil flow of the quenching cavity of the quenching press, provided by the embodiment of the invention, in the first time when the oil flow is larger after the quenching press is started, whether the oil overflow port of the quenching cavity has normal oil flow or not is monitored in a flow velocity monitoring mode, and whether the oil flow in the quenching cavity is normal or not can be accurately judged; in the working process of the quenching press, whether the oil overflow port of the quenching cavity has normal oil flow or not is continuously monitored in a flow velocity monitoring mode under the condition that the oil flow tends to be stable, and whether the oil flow in the quenching cavity is normal or not can be monitored. The monitoring system for the quenching chamber oil flow of the quenching press provided by the embodiment of the invention realizes accurate monitoring of the quenching chamber oil flow of the quenching press and ensures the quenching quality of parts.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.