阅读说明：本技术 一种面向充液成形设备的柔性压边控制系统及其使用方法 (Flexible edge pressing control system for liquid filling forming equipment and use method thereof ) 是由 谢亚苏 成刚 程鹏志 葛宇龙 阮尚文 于 2021-09-01 设计创作，主要内容包括：本发明提供一种面向充液成形设备的柔性压边控制系统,包括控制系统,控制系统分别连接控制两个伺服阀,其中一个伺服阀与压力缸连接,另一个伺服阀与主缸连接,压力缸连接压力传感器,主缸连接位移传感器,压力传感器和位移传感器连接分别连接控制系统,控制系统上设置与其连接的操作界面,在操作界面上设置参数来最终操控压力传感器和位移传感器。还公开了其使用方法；可自动修正使用者在预备阶段设置的压边力数值,对于过小的压边力进行自动增补；同时可设置变压边力条件,依据时间或位移设置实时压边力的数值,在整个成形过程中压边力可实现柔性变化；由此成形出的零件可减少试制过程,能够很好的成形出最佳状态的零件。(The invention provides a flexible blank holder control system for liquid filling forming equipment, which comprises a control system, wherein the control system is respectively connected and controls two servo valves, one servo valve is connected with a pressure cylinder, the other servo valve is connected with a main cylinder, the pressure cylinder is connected with a pressure sensor, the main cylinder is connected with a displacement sensor, the pressure sensor and the displacement sensor are respectively connected with the control system, an operation interface connected with the control system is arranged on the control system, and parameters are arranged on the operation interface to finally control the pressure sensor and the displacement sensor. Methods of use thereof are also disclosed; the blank holder force value set by the user in the preparation stage can be automatically corrected, and the excessively small blank holder force is automatically supplemented; meanwhile, the variable blank holder force condition can be set, the real-time blank holder force value is set according to time or displacement, and the blank holder force can realize flexible change in the whole forming process; the formed part can reduce the trial production process and can well form the part in the optimal state.)

1. The utility model provides a flexible blank pressing control system towards liquid-filled forming equipment which characterized in that: the control system is respectively connected with and controls the two servo valves, one servo valve is connected with the pressure cylinder, the other servo valve is connected with the main cylinder, the pressure cylinder is connected with the pressure sensor, the main cylinder is connected with the displacement sensor, the pressure sensor and the displacement sensor are respectively connected with and controlled by the control system, the control system is provided with the operation interface connected with the control system, and the operation interface is provided with parameters to finally control the pressure sensor and the displacement sensor.

2. A flexible binder control system for a hydroforming tool according to claim 1, wherein: the operation interface sets the numerical value of the blank holder force and transmits the geometric information of the part to the control system, and the control system judges whether the numerical value of the blank holder force is properly set according to the geometric information of the part.

3. A flexible binder control system for a hydroforming tool according to claim 2, wherein: the control system automatically corrects the blank holder force value set in the preparation stage on the operation interface, and automatically supplements the excessively small blank holder force; meanwhile, the variable blank holder force condition can be set, the real-time blank holder force value is set according to time or displacement, and the blank holder force can realize flexible change in the whole forming process.

4. The use method of the flexible blank pressing control system facing the liquid filling forming equipment is characterized in that: the method comprises the following steps:

(1) a user sets a blank holder force value on an operation interface, geometric information of the part is transmitted to the control system, the control system judges whether the blank holder force value is properly set according to the geometric information of the part, the control system can automatically correct the smaller blank holder force setting, and the control system gives a prompt but does not automatically correct the larger blank holder force setting;

(2) the control system controls the servo valve and the blank pressing cylinder to output according to the set blank pressing force in the forming process, and the blank pressing force can be set to be a fixed value or a flexible change value according to time or displacement; the pressure output by the blank pressing cylinder in real time in the forming process is fed back to a control system through the induction of a pressure sensor to carry out closed-loop control; if the blank holder force-displacement setting is used, the displacement value is fed back to the control system through the displacement sensor to carry out closed-loop control.

Technical Field

The invention belongs to the technical field of material forming control, and particularly relates to a flexible blank holder control system for a liquid filling forming device and a using method thereof.

Background

For the active plate liquid-filling forming process, the blank holder force is a very key process parameter in the whole process flow, the excessive blank holder force can lead the part forming area to be broken due to insufficient material supplement, and the excessive material accumulation of the part flange area can lead the part flange area to be broken due to the excessive material accumulation; the traditional active plate liquid-filling forming equipment usually has a fixed blank holder force setting value, and after a user sets the blank holder force in a preparation stage, the blank holder force can keep a fixed value in the whole forming process until the forming is finished; according to the method, a large number of trial-manufacture processes are needed to meet the forming conditions of the parts, the parts in the optimal state cannot be formed, and the workload of manual modification after the process is finished is huge.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a flexible blank holder control system facing a liquid filling forming device and a using method thereof. The flexible blank holder control system facing the liquid filling forming equipment can automatically correct the blank holder force value set by a user in the preparation stage, and automatically supplement the too small blank holder force; meanwhile, the variable blank holder force condition can be set, the real-time blank holder force value is set according to time or displacement, and the blank holder force can realize flexible change in the whole forming process; the formed parts can reduce the trial production process, can well form the parts in the optimal state, and has small workload of manual modification after the process is finished.

In order to achieve the purpose, the invention adopts the following technical scheme: the invention provides a flexible blank holder control system facing a liquid filling forming device, which comprises a control system, two servo valves, a blank holder cylinder, a main cylinder, a pressure sensor, a displacement sensor and an operation interface, wherein the control system is respectively connected and controls the two servo valves, one servo valve is connected with the pressure cylinder, the other servo valve is connected with the main cylinder, the pressure cylinder is connected with the pressure sensor, the main cylinder is connected with the displacement sensor, the pressure sensor and the displacement sensor are respectively connected and connected with the control system, the control system is provided with the operation interface connected with the control system, and the operation interface is provided with parameters to finally control the pressure sensor and the displacement sensor.

Preferably, the operation interface sets the value of the blank holder force and transmits the geometric information of the part to the control system, and the control system judges whether the value of the blank holder force is properly set according to the geometric information of the part.

Preferably, the control system automatically corrects the blank holder force value set in the preparation stage on the operation interface, and automatically supplements the blank holder force which is too small; meanwhile, the variable blank holder force condition can be set, the real-time blank holder force value is set according to time or displacement, and the blank holder force can realize flexible change in the whole forming process.

The invention provides a use method of a flexible blank holder control system facing a liquid-filled forming device, which comprises the following steps:

(1) a user sets a blank holder force value on an operation interface, geometric information of the part is transmitted to the control system, the control system judges whether the blank holder force value is properly set according to the geometric information of the part, the control system can automatically correct the smaller blank holder force setting, and the control system gives a prompt but does not automatically correct the larger blank holder force setting;

(2) the control system controls the servo valve and the blank pressing cylinder to output according to the set blank pressing force in the forming process, and the blank pressing force can be set to be a fixed value or a flexible change value according to time or displacement; the pressure output by the blank pressing cylinder in real time in the forming process is fed back to a control system through the induction of a pressure sensor to carry out closed-loop control; if the blank holder force-displacement setting is used, the displacement value is fed back to the control system through the displacement sensor to carry out closed-loop control.

The invention has the following beneficial effects:

(1) according to the traditional mode, the forming condition of the part is met through a large amount of trial-manufacturing, meanwhile, the part in the optimal state cannot be formed, and the workload of manual trimming after the process is finished is huge.

(2) The flexible blank holder control system facing the liquid filling forming equipment can automatically correct the blank holder force value set by a user in the preparation stage, and automatically supplement the too small blank holder force; meanwhile, the variable blank holder force condition can be set, the real-time blank holder force value is set according to time or displacement, and the blank holder force can realize flexible change in the whole forming process; the formed parts can reduce the trial production process, can well form the parts in the optimal state, and has small workload of manual modification after the process is finished.

Drawings

For a clearer explanation of the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic view of a flexible binder control system for a hydroforming apparatus according to the present invention.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making creative efforts based on the embodiments of the present invention, shall fall within the protection scope of the present invention.

The present invention is described in further detail below by way of examples.

For the active plate liquid-filling forming process, the blank holder force is a very key process parameter in the whole process flow, the excessive blank holder force can lead the part forming area to be broken due to insufficient material supplement, and the excessive material accumulation of the part flange area can lead the part flange area to be broken due to the excessive material accumulation; the traditional active plate liquid-filling forming equipment usually has a fixed blank holder force setting value, and after a user sets the blank holder force in a preparation stage, the blank holder force can keep a fixed value in the whole forming process until the forming is finished; in order to solve the above problems, the following embodiments are provided:

example (b): a flexible edge pressing control system for liquid filling forming equipment comprises a control system, two servo valves, an edge pressing cylinder, a main cylinder, a pressure sensor, a displacement sensor and an operation interface, wherein the control system is respectively connected with and controls the two servo valves, one servo valve is connected with the pressure cylinder, the other servo valve is connected with the main cylinder, the pressure cylinder is connected with the pressure sensor, the main cylinder is connected with the displacement sensor, the pressure sensor and the displacement sensor are respectively connected with and connected with the control system, the control system is provided with the operation interface connected with the control system, and parameters are set on the operation interface to finally control the pressure sensor and the displacement sensor.

In this embodiment, the operation interface sets the blank holder force value and transmits the geometric information of the part to the control system, and the control system judges whether the blank holder force value setting is proper or not according to the geometric information of the part.

In this embodiment, the control system automatically corrects the blank holder force value set in the preparation stage on the operation interface, and automatically supplements the blank holder force which is too small; meanwhile, the variable blank holder force condition can be set, the real-time blank holder force value is set according to time or displacement, and the blank holder force can realize flexible change in the whole forming process.

A use method of a flexible blank holder control system facing a liquid-filled forming device comprises the following steps:

(1) a user sets a blank holder force value on an operation interface, geometric information of the part is transmitted to the control system, the control system judges whether the blank holder force value is properly set according to the geometric information of the part, the control system can automatically correct the smaller blank holder force setting, and the control system gives a prompt but does not automatically correct the larger blank holder force setting;

(2) the control system controls the servo valve and the blank pressing cylinder to output according to the set blank pressing force in the forming process, and the blank pressing force can be set to be a fixed value or a flexible change value according to time or displacement; the pressure output by the blank pressing cylinder in real time in the forming process is fed back to a control system through the induction of a pressure sensor to carry out closed-loop control; if the blank holder force-displacement setting is used, the displacement value is fed back to the control system through the displacement sensor to carry out closed-loop control.

Having thus described the basic principles and essential features of the invention and its advantages, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

The flexible blank holder control system for the liquid filling forming equipment obtains part information through visual measurement, virtual grids are overlapped with part pictures, and the grids change along with the change of key characteristics of parts, so that material strain data are obtained in real time, and a user can visually observe the process of material deformation on a PC (personal computer) end or a mobile terminal; the virtual grid can be set to be of a grid type when finite element analysis is carried out, grid deformation data in the actual forming process is compared with a finite element analysis simulation result, and therefore the numerical simulation parameter setting is corrected, and the accuracy of finite element analysis simulation of similar materials can be conveniently improved.

The flexible blank pressing control system facing the liquid filling forming equipment does not need to waste time to print grids on the surface of the part, and the whole surface of the part can be covered by the virtual grids without being limited by the size of the part; the strain data information of the part can be obtained in real time in the forming process, post-measurement is not needed, and the test data can be called and used at any time in the later period; the user can be provided with the most intuitive feeling at the PC end or the mobile end by utilizing the augmented reality technology, and the user can also generate an immersive experience by configuring the head-mounted mobile end equipment.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.