A method for detecting and matching the working energy of a press

Abstract

The present invention discloses a method for detecting and matching the working energy of a press. The characteristic is that the detection and matching system adopted by it is composed of a load detection device, a stroke angle detection device, a punching pressure stroke curve drawing module, an energy matching module and an alarm module. The advantages are that this method can detect the actual punching pressure required by the die of the press in real time and automatically calculate the actual working energy required by the die, and can adjust the running SPM of the press according to the calculated actual working energy to meet the working energy requirement of the die and ensure the stamping quality of parts. Moreover, this method can also be used for the stamping detection of a die testing machine, and the detection data can be used as a reference for subsequent selection of a press, so that the press manufacturer can design a working energy table of the press that more conforms to the die requirements, optimize the rotational speed and size of the press flywheel, and improve the service life of the press.

Description

Technical Field

[0001] The present invention relates to the detection of the performance of a press, and particularly to a method for detecting and matching the working energy of a press. Background Art

[0002] Presses can be widely used in processes such as cutting, punching, blanking, bending, riveting, and forming. They process metal blanks into parts by applying a strong pressure to cause plastic deformation of the metal. For a press, it needs to process different parts, including differences in materials, thicknesses, and dimensions, etc. When stamping different parts, the required working energy will also be different. However, when designing stamping dies, most have no concept of the working energy required for stamping and it is difficult to provide accurate data parameters for the working energy required for product stamping. Therefore, during the actual use of a press, there are often situations where the stamping energy is insufficient, the stamping speed of the press becomes slower and slower, resulting in the inability to complete stamping of the same batch of products or the appearance of defective products. The root cause of the above problems may be that the energy consumed by the press in one stroke is greater than its designed reserved energy, resulting in an excessive reduction rate of the flywheel speed and being unable to be replenished in time. Then, each subsequent stroke will excessively consume the flywheel energy storage of the press, ultimately leading to insufficient energy of the press and shutdown. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a method for detecting and matching the working energy of a press, which can detect the actual punching force required by the die of the press in real time and automatically calculate the actual working energy required by the die. At the same time, according to the calculated actual working energy, the SPM (i.e., strokes per minute) of the press is adjusted to meet the working energy requirements of the die, ensure the stamping quality of the parts, and also reduce energy waste.

[0004] The technical solution adopted by the present invention to solve the above technical problem is: a method for detecting and matching the working energy of a press, and the detection and matching system adopted by it is composed of a load detection device, a stroke angle detection device, a punching force - stroke curve drawing module, an energy matching module, and an alarm module. The specific implementation method includes the following steps:

[0005] (1). Pre - input the corresponding table of the SPM of the press itself and the set stamping working energy in the energy matching module;

[0006] (2). When the press is working, the stroke angle detection device detects the operating SPM of the press and the real - time stroke displacement of the slider, transmits the operating SPM of the press to the energy matching module, and at the same time transmits the stroke displacement of the slider to the punching force - stroke curve drawing module at a set time interval. The load detection device detects the punching force required by the die of the press during stamping in real time and transmits it to the punching force - stroke curve drawing module at the same time interval;

[0007] (3) The stamping force stroke curve drawing module receives the stamping force and the stroke displacement of the slider, draws the stamping force stroke curve, and calculates the actual working energy value required by the mold.

[0008] (4) The stamping force stroke curve drawing module transmits the actual working energy value required by the mold to the energy matching module.

[0009] (5) The energy matching module compares the actual working energy value required by the mold with the set working energy value corresponding to the running SPM of the press during detection, and judges the size. If the actual required working energy value is less than the set working energy value, then step (6) is executed, and then step (11) is executed; otherwise, step (7) is executed.

[0010] (6) The alarm module displays the actual working energy required by the mold.

[0011] (7) If the actual working energy value required by the mold is greater than the maximum value of the set working energy in the corresponding table, then step (8) is executed, and then step (11) is executed; otherwise, the energy matching module searches for the closest corresponding SPM in the corresponding table according to the actual working energy value required by the mold, and executes step (9).

[0012] (8) The alarm module issues an alarm, displays the actual working energy required by the mold, and controls the press to stop running.

[0013] (9) The alarm module displays the actual working energy required by the mold and the corresponding matched SPM, and at the same time asks whether to match this SPM. If it matches, then step (10) is executed; if it does not match, then step (8) is executed, and then step (11) is executed.

[0014] (10) The energy matching module automatically adjusts the running SPM of the press to the corresponding matched SPM.

[0015] (11) End.

[0016] Further, in step (1), the number of stamping strokes to be detected is set in the stamping force stroke curve drawing module.

[0017] And step (3-1) is added after step (3): After the stamping force stroke curve drawing module receives the numerical values of one stamping stroke, the number of stamping strokes will automatically increase by one from 0 and be compared with the set number of stamping strokes to be detected. If it has not reached, then step (3) is repeated; if it has reached, then the maximum working energy value or the average working energy value actually required by the mold among the detected number of stamping strokes is calculated, and then this maximum working energy value or average working energy value is transmitted to the energy matching module.

[0018] Further, the load detection device is a strain gauge installed on the column of the press or a hydraulic sensor arranged on the overload oil pressure protection pipeline of the press.

[0019] Further, the stroke angle detection device is an electronic encoder equipped with the press itself.

[0020] Further, in the step (5), if the actual working energy value required by the die is less than the set working energy value corresponding to the SPM of the press during detection, then step (6) is executed. At the same time, the energy matching module searches for the closest corresponding SPM in the corresponding table according to the actual working energy value required by the die, and executes step (9).

[0021] Compared with the prior art, the advantages of the present invention are that this method can detect the actual punching force required by the die of the press in real time and automatically calculate the actual working energy required by the die, and can adjust the SPM of the press according to the calculated actual working energy to meet the die's demand for working energy and ensure the stamping quality of the parts; moreover, this method can be used for stamping detection before batch stamping of parts to facilitate timely adjustment of the SPM of the press to make the subsequent part stamping in the best state; it can also be used for stamping detection of the die testing machine, and use the detection data as a reference for subsequent selection of the press, so that the press manufacturer can design a press working energy table that more meets the die requirements, optimize the rotational speed and size of the press flywheel, and improve the service life of the press. Brief Description of the Drawings

[0022] Figure 1 is a connection schematic diagram of the detection and matching system of the present invention;

[0023] Figure 2 is a flow chart of the present invention. Detailed Embodiment

[0024] The following further describes the present invention in detail with reference to the embodiments of the drawings.

[0025] As shown in the figure, a method for detecting and matching the working energy of a press, the detection and matching system adopted by which is composed of a load detection device 1, a stroke angle detection device 2, a punching force stroke curve drawing module 3, an energy matching module 4 and an alarm module 5. The specific implementation method includes the following steps:

[0026] (1), Input the corresponding table of the SPM of the press itself and the set stamping working energy into the energy matching module 4 in advance;

[0027] (2) The press operates, and the stroke angle detection device 2 detects the running SPM of the press and the real-time stroke displacement of the slider. It transmits the running SPM of the press to the energy matching module 4, and at the same time transmits the stroke displacement of the slider to the stamping force - stroke curve plotting module 3 at a set time interval. The load detection device 1 detects in real time the stamping force required by the die of the press during stamping and transmits it to the stamping force - stroke curve plotting module 3 at the same time interval, that is, the transmitted stamping force corresponds to the transmitted slider stroke displacement point;

[0028] (3) The stamping force - stroke curve plotting module 3 receives the stamping force and the stroke displacement of the slider within a stamping stroke. It takes the stroke displacement of the slider as the X - coordinate value and the stamping force required by the die as the Y - coordinate value, plots the stamping force - stroke curve of this stamping stroke and stores it, and then automatically calculates the value of the area enclosed by the stamping force - stroke curve, the X - axis (stroke), and the Y - axis (stamping force), that is, the actual working energy value required by the die;

[0029] (4) The stamping force - stroke curve plotting module 3 transmits the actual working energy value required by the die to the energy matching module 4;

[0030] (5) The energy matching module 4 compares the actual working energy value required by the die with the set working energy value corresponding to the running SPM of the press during detection, and judges the size. If the actual working energy value required is less than the set working energy value, it executes step (6), and then executes step (11); otherwise, it executes step (7);

[0031] (6) The alarm module 5 displays the actual working energy required by the die;

[0032] (7) If the actual working energy value required by the die is greater than the maximum value of the set working energy in the corresponding table, it executes step (8), and then executes step (11); otherwise, the energy matching module 4 searches in the corresponding table for the closest corresponding SPM according to the actual working energy value required by the die and executes step (9);

[0033] (8) The alarm module 5 issues an alarm, displays the actual working energy required by the die, and controls the press to stop running;

[0034] (9) The alarm module 5 displays the actual working energy required by the die and the corresponding SPM that is matched. At the same time, it asks whether to match this SPM. If it matches, it executes step (10); if it does not match, it executes step (8), and then executes step (11);

[0035] (10) The energy matching module 4 automatically adjusts the running SPM of the press to the corresponding SPM that is matched;

[0036] (11) End.

[0037] Preferably, in order to improve the accuracy of detecting the stamping working energy, the number of stamping strokes to be detected can also be set in the stamping force stroke curve drawing module 3 in advance. That is to say, before stamping a batch of parts in batches or when another kind of part needs to be stamped on the press, a small batch of stamping tests can be carried out on the parts to be stamped first. At this time, step (3-1) needs to be added after the above step (3): after the stamping force stroke curve drawing module 3 receives the value of one stamping stroke, the number of stamping strokes will automatically increase by one from 0 and be compared with the set number of stamping strokes to be detected. If it has not reached, step (3) will be repeatedly executed; if it has reached, among the detected number of stamping strokes, the maximum working energy value actually required by the mold or the average value of the working energy actually required by the mold is calculated, and then the maximum working energy value or the average working energy value is transmitted to the energy matching module 4, and then the subsequent steps (5) to (11) are continued.

[0038] In addition, in order to reduce energy waste, in step (5) of the above embodiment, if the working energy value actually required by the mold is less than the set working energy value corresponding to the running SPM of the press during detection, while executing step (6), the energy matching module 4 can also be made to find the closest corresponding SPM in the corresponding table according to the working energy value actually required by the mold and execute step (9) to match and adjust the running SPM of the press to reduce energy consumption.

[0039] In the above embodiment, the load detection device 1 can adopt a strain gauge, which is installed on the press column and obtains the stamping force required when the mold stamps by detecting the deformation amount of the press column, or a hydraulic sensor, which obtains the stamping force by detecting the oil pressure in the overload oil pressure protection pipeline of the press.

[0040] The stroke angle detection device 2 is an electronic encoder equipped with the press itself.

[0041] The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention is subject to the claims, and any substitutions, deformations, and improvements that are easily conceivable by those skilled in the art to this technology fall within the protection scope of the present invention.

Claims

1. A method for detecting and matching the working energy of a press, characterized in that The adopted detection and matching system is composed of a load detection device, a stroke angle detection device, a stamping pressure stroke curve drawing module, an energy matching module, and an alarm module. The specific implementation method includes the following steps: (1) Pre-input the corresponding table of the SPM of the press itself and the set stamping working energy in the energy matching module; (2) When the press is working, the stroke angle detection device detects the operating SPM of the press and the real-time stroke displacement of the slider, transmits the operating SPM of the press to the energy matching module, and at the same time transmits the stroke displacement of the slider to the stamping pressure stroke curve drawing module at a set time interval. The load detection device detects the stamping pressure required by the die of the press in real time and transmits it to the stamping pressure stroke curve drawing module at the same time interval; (3) The stamping pressure stroke curve drawing module receives the stamping pressure and the stroke displacement of the slider, draws the stamping pressure stroke curve, and calculates the actual working energy value required by the die; (4) The stamping pressure stroke curve drawing module transmits the actual working energy value required by the die to the energy matching module; (5) The energy matching module compares the actual working energy value required by the die with the set working energy value corresponding to the operating SPM of the press during detection, and judges the size. If the actual required working energy value is less than the set working energy value, execute step (6), and then execute step (11); otherwise, execute step (7); (6) The alarm module displays the actual working energy required by the die; (7) If the actual working energy value required by the die is greater than the maximum value of the set working energy in the corresponding table, execute step (8), and then execute step (11); otherwise, the energy matching module finds the closest corresponding SPM in the corresponding table according to the actual working energy value required by the die, and executes step (9); (8) The alarm module issues an alarm, displays the actual working energy required by the die, and controls the press to stop running; (9) The alarm module displays the actual working energy required by the die and the corresponding SPM that matches it, and at the same time asks whether to match this SPM. If it matches, execute step (10); if it does not match, execute step (8), and then execute step (11); (10) The energy matching module automatically adjusts the operating SPM of the press to the corresponding SPM that matches it; (11) End.

2. The detection and matching method for the working energy of a press according to claim 1, characterized in that: In step (1) described above, set the number of stamping strokes to be detected in the stamping pressure stroke curve drawing module; And add step (3-1) after step (3): After the stamping pressure stroke curve drawing module receives the numerical values of one stamping stroke, the number of stamping strokes will automatically increase by one from 0 and be compared with the set number of stamping strokes to be detected. If it has not been reached, repeat step (3); if it has been reached, calculate the maximum working energy value or the average working energy value actually required by the die among the detected number of stamping strokes, and then transmit the maximum working energy value or the average working energy value to the energy matching module.

3. The detection and matching method for the working energy of a press according to claim 1, characterized in that: The load detection device is a strain gauge installed on the column of the press or a hydraulic sensor arranged on the overload oil pressure protection pipeline of the press.

4. The detection and matching method for the working energy of a press according to claim 1, characterized in that: The described stroke angle detection device is an electronic encoder equipped with the press itself.

5. The detection and matching method for the working energy of a press according to claim 1, characterized in that: In the described step (5), if the actual working energy value required by the mold is less than the set working energy value corresponding to the SPM of the press during detection, then step (6) is executed. At the same time, the energy matching module searches for the closest corresponding SPM in the corresponding table according to the actual working energy value required by the mold and executes step (9).

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