Online measuring device for dynamic parallelism of press machine

Abstract

A dynamic parallelism online measuring device for a press machine comprises a press machine sliding block, a platen, a fixing frame and an online displacement measuring system. The on-line displacement measuring system comprises a plurality of displacement rulers, an inductive head, a controller and a display memory, the fixed frame is vertically fixed on the bedplate, the plurality of displacement rulers are respectively fixed on the fixed frame of the bedplate, the inductive head is fixed on the side surface of the sliding block, the plurality of displacement rulers are connected with the controller and transmit signals to the controller, and the display memory is connected with the controller. The display memory is connected with the controller and receives signals of the controller, and the signals, processed by the controller, of the displacement rulers are displayed on the display memory. The device has the advantages that the front-back direction and the left-right direction of the sliding block of the press machine can be synchronously measured at a time in a full-stroke mode, a curve of parallelism can be drawn in real time by solving real-time difference values among four positions, the press machine can be triggered to stop by judging the range of the difference values, and therefore equipment and a mold are protected.

Description

Technical Field

[0001] The utility model relates to a parallelism measuring device for a press machine, in particular to an online dynamic parallelism measuring device. Background Art

[0002] At present, the static parallelism measurement technology of presses is basically a mechanical metering method, and corresponding specifications and standards have been formed. In comparison, the dynamic parallelism measurement technology of presses is not mature, and the specific measurement content and related measurement methods have not yet formed specifications or standards. The industry's requirements for the dynamic accuracy of presses are to be able to measure the bottom dead center accuracy, the front and back of the slider, and the dynamic parallelism accuracy in the left and right directions.

[0003] Overload of a press means that the force point of the press is not in the center of the press. Due to the imbalance of the stamping workpiece, especially multi-station presses, overload problems are common. Even if the mold design is optimized to balance the force of the overload, it is impossible to ensure that the force point is always in the center of the press. This requires that the press design has a relatively large anti-overload capacity. In the actual stamping process, if the anti-overload capacity is less than the actual overload of the press, the press is prone to damage its accuracy.

[0004] In order to better protect the press and perform preventive maintenance, it is necessary to develop an online measuring device for the dynamic parallelism of the press. Summary of the invention

[0005] The technical problem to be solved by the utility model is to overcome the above-mentioned defects of the prior art and provide an online measuring device for the dynamic parallelism of a press machine, which can measure the dynamic parallelism of a slide block of a press machine in real time.

[0006] The technical solution adopted by the utility model to solve the above technical problems is:

[0007] A press dynamic parallelism online measuring device comprises a press slide, a table, a fixed frame, and an online displacement measuring system; the online displacement measuring system comprises several displacement rulers, a sensing head, a controller and a display memory, the fixed frame is vertically fixed on the table, several displacement rulers are respectively fixed on the fixed frame of the table, the sensing head is fixed on the side of the slide, several displacement rulers are connected to the controller and transmit signals to the controller, the display memory is connected to the controller and receives signals from the controller, and the signals of several displacement rulers processed by the controller are displayed on the display memory.

[0008] Preferably, there are four displacement rulers, which are respectively set at the corresponding four corners of the slider. The measurements of the four displacement rulers are combined into a system and synchronously collect the data of the front and rear, left and right sliders of each stamping. The data are processed by the controller and synchronously displayed on the display memory. It can monitor the influence of the press overload on the parallelism in real time.

[0009] Preferably, the data of the front and rear and left and right slide blocks are processed by the controller and the press is triggered to stop by judging the extreme difference.

[0010] Better yet, the displacement ruler and the controller use PROFINET bus communication to collect data, avoiding the influence of interference on the measurement data and improving detection reliability.

[0011] Compared with the prior art, the advantages of the utility model are that the front and rear and left and right directions of the press slide can be synchronously measured in a full stroke at one time. By calculating the real-time difference between the four positions, the parallelism curve can be drawn in real time, and the press shutdown can be triggered by judging the extreme difference, thereby protecting the equipment and mold.

[0012] Displacement ruler detection is also used, which has high measurement accuracy and no wear due to non-contact measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view of the online measuring device for dynamic parallelism of a press machine according to an embodiment of the utility model.

[0014] Figure 2 It is a side view of the online measuring device for dynamic parallelism of a press machine according to an embodiment of the utility model. DETAILED DESCRIPTION

[0015] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0016] like Figure 1 , 2 As shown, an online measuring device for dynamic parallelism of a press includes a press slide 1, a table 2, a fixing frame 5, and an online displacement measuring system.

[0017] The online displacement measurement system includes four displacement rulers 4, a sensing head 3, a controller 7 and a display memory 6. The fixing frame 5 is vertically fixed on the table 2. The four displacement rulers 4 are respectively fixed on the fixing frame 5 of the table 2. The sensing head 3 is fixed on the side of the slider 1. The four displacement rulers 4 are connected to the controller 7 and transmit signals to the controller 7. The display memory 6 is connected to the controller 7 and receives signals from the controller 7, and displays the signals of the displacement rulers 4 processed by the controller 7 on the display memory 6.

[0018] The four displacement measurements are combined into one system and synchronously collect the data of the front and rear and left and right sliders of each stamping, which are processed by the controller 7 and synchronously displayed on the display memory 6, which can monitor the impact of the press eccentric load on the parallelism in real time. The data of the front and rear and left and right sliders are processed by the controller and the press is stopped by judging the extreme difference of the difference.

[0019] The displacement ruler 4 has an accuracy of 1 um, linear measurement, and absolute value output. Since it is a non-contact measurement, there is no wear.

[0020] The displacement ruler 4 and the controller 7 communicate via the Profinet bus. Profinet operates at a speed of 100 megabits per second and the cable length can reach 100 meters. Due to its high-speed operation and response time of less than 1 millisecond, Profinet is an ideal choice for high-speed applications.

[0021] When using the on-line measuring device for dynamic parallelism of a press machine, when the slide blocks are on the same horizontal line, the heights of the four displacement rulers 4 are calibrated to be consistent.

[0022] When the slider is running, the online dynamic parallelism measuring device of the press uses four displacement rulers to monitor the data of the front and rear, left and right sliders of each stamping in real time. By recording the deviation value formed by the current values ​​of the four displacement rulers, the parallelism of the slider during operation can be determined and displayed synchronously on the display memory 6.

[0023] The controller 7 can also process the collected signals of the displacement scale to form a real-time curve of the parallelism change of the press based on the changes in the four angular positions of the slider at the bottom dead center position, and through the established relationship model between the parallelism change and the press overload, it can control the application of the press overload and protect the high-speed press from damage.

Claims

1. An online measuring device for dynamic parallelism of a press, characterized in that: It includes a press slide, a table, a fixed frame, and an online displacement measurement system; the online displacement measurement system includes several displacement rulers, a sensor head, a controller and a display memory. The fixed frame is vertically fixed on the table, several displacement rulers are respectively fixed on the fixed frame of the table, the sensor head is fixed on the side of the slide, several displacement rulers are connected to the controller and transmit signals to the controller, the display memory is connected to the controller and receives signals from the controller, and the signals of several displacement rulers processed by the controller are displayed on the display memory.

2. The on-line measuring device for dynamic parallelism of a press machine as claimed in claim 1, characterized in that: There are four displacement rulers, which are respectively set at the corresponding four corners of the slider. The measurements of the four displacement rulers are combined into a system and synchronously collect the data of the front and rear, left and right sliders of each stamping, which are processed by the controller and synchronously displayed on the display memory.

3. The on-line measuring device for dynamic parallelism of a press machine as claimed in claim 2, characterized in that: The data of the front, rear, left and right slide blocks are processed by the controller and the press is triggered to stop by judging the extreme difference.

4. The on-line measuring device for dynamic parallelism of a press machine as claimed in claim 1, characterized in that: The displacement ruler and the controller use Profinet bus communication to collect data.

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