阅读说明：本技术 200t单柱式液压机高精度控制系统 (200T single-column hydraulic press high accuracy control system ) 是由 于航 刘志慧 刘健 宋博 陈立弘 李广程 王建 于 2019-10-18 设计创作，主要内容包括：本发明涉及一种200T单柱式液压机高精度控制系统,属于自动化技术领域。所述系统包括擦油缸、液压系统和PLC系统；所述擦油缸内置位移传感器；所述液压系统设置有阿托斯DLHZO-TEZ-D-SN-EI-040-L33-I伺服阀带集成式轴控制器,用于检测和控制油缸伸出长度及反馈油缸有杆腔和无杆腔压力；通过PLC与DLHZO-TEZ-D-SN-EI-040-L33-I伺服阀通过Ethernet IP通讯,当压力未达到设定值时进行位置控制,根据系统设定位置控制油缸,当压力达到设定值时自动切换到压力控制,依系统设定压力控制油缸。本发明使液压油缸位置控制精度和重复精度更准确,提高了型材成品率和效率。(The invention relates to a high-precision control system of a 200T single-column hydraulic machine, belonging to the technical field of automation. The system comprises a wiping cylinder, a hydraulic system and a PLC system; a displacement sensor is arranged in the oil wiping cylinder; the hydraulic system is provided with an Atomos DLHZO-TEZ-D-SN-EI-040-L33-I servo valve belt integrated shaft controller for detecting and controlling the extending length of an oil cylinder and feeding back the pressure of a rod cavity and a rodless cavity of the oil cylinder; the PLC and the DLHZO-TEZ-D-SN-EI-040-L33-I servo valve are communicated through Ethernet IP, position control is carried out when the pressure does not reach a set value, the oil cylinder is controlled according to the set position of the system, automatic switching is carried out to pressure control when the pressure reaches the set value, and the oil cylinder is controlled according to the set pressure of the system. The invention ensures that the position control precision and the repeatability precision of the hydraulic cylinder are more accurate, and improves the yield and the efficiency of the sectional material.)

1.200T single-column hydraulic press high accuracy control system, its characterized in that: comprises a wiping cylinder, a hydraulic system and a PLC system;

a displacement sensor is arranged in the oil wiping cylinder;

the hydraulic system is provided with an Atomos DLHZO-TEZ-D-SN-EI-040-L33-I servo valve belt integrated shaft controller for detecting and controlling the extending length of an oil cylinder and feeding back the pressure of a rod cavity and a rodless cavity of the oil cylinder;

the PLC and the DLHZO-TEZ-D-SN-EI-040-L33-I servo valve are communicated through Ethernet IP, position control is carried out when the pressure does not reach a set value, the oil cylinder is controlled according to the set position of the system, automatic switching is carried out to pressure control when the pressure reaches the set value, and the oil cylinder is controlled according to the set pressure of the system.

2. The high-precision control system of the 200T single-column hydraulic machine according to claim 1, characterized in that: the control of the LC system includes 3 selection steps, namely jog, automatic and fine;

the inching is to press a pressing button, an oil cylinder extends downwards and stops when the pressing button is pressed and the hand is loosened, the oil cylinder retracts when the return button is pressed and stops when the pressing button is loosened;

when the point motion selection is switched to automatic operation, the oil cylinder retracts to the initial position, the oil cylinder 1 and the oil cylinder 2 are pressed down quickly after the position parameters to be lowered are set, the descending speed of the oil cylinder is reduced to enter a slow-down state when the position parameters to be lowered are set, the press machine is decelerated again to enter a working state when the position 50mm away from the stroke is set, the oil cylinder maintains pressure for 2S after the position reaches the designated position, pressure is released for 2S immediately and then the press machine returns, and the operation is finished;

when the pressing position of the novel material is unknown, the fine adjustment is carried out by pressing a fine adjustment button when a fine adjustment gear is selected, and then the press is pressed down by 0.5-0.6 mm.

Technical Field

The invention belongs to the technical field of automation, and relates to a high-precision control system of a 200T single-column hydraulic machine.

Background

Along with the high-speed development of the aluminum profile deep processing industry, the requirements on the yield and the efficiency of the press machine are higher and higher, the original press machine only generates pressure on the profile to enable the profile to be subjected to plastic deformation, the profile forming cannot be accurately and efficiently controlled, and the parameters of the newly designed aluminum profile product profile need a large number of samples to be adjusted and verified, so that manpower and material resources are wasted, and therefore the control precision and the efficient innovative design of the position and the pressure of the press machine are urgent.

Disclosure of Invention

In view of this, the present invention provides a high-precision control system for a 200T single-column hydraulic press, which improves the yield and efficiency of the press, improves the degree of automation, and reduces the production cost.

In order to achieve the purpose, the invention provides the following technical scheme:

the high-precision control system of the 200T single-column hydraulic machine comprises a wiping oil cylinder, a hydraulic system and a PLC system;

a displacement sensor is arranged in the oil wiping cylinder,

the hydraulic system is provided with an Atomos DLHZO-TEZ-D-SN-EI-040-L33-I servo valve belt integrated shaft controller for detecting and controlling the extending length of an oil cylinder and feeding back the pressure of a rod cavity and a rodless cavity of the oil cylinder;

the PLC and the DLHZO-TEZ-D-SN-EI-040-L33-I servo valve communicate through Ethernet IP, position control is carried out when the pressure does not reach a set value, the oil cylinder is controlled according to the set position of the system, automatic switching is carried out to pressure control when the pressure reaches the set value, and the oil cylinder is controlled according to the set pressure of the system.

Optionally, the control of the LC system comprises 3 selection steps, namely jog, automatic and fine adjustment;

the inching is to press a pressing button, an oil cylinder extends downwards and stops when the pressing button is pressed and the hand is loosened, the oil cylinder retracts when the return button is pressed and stops when the pressing button is loosened;

when the point motion selection is switched to automatic operation, the oil cylinder retracts to the initial position, the oil cylinder 1 and the oil cylinder 2 are pressed down quickly after the position parameters to be lowered are set, the descending speed of the oil cylinder is reduced to enter a slow-down state when the position parameters to be lowered are set, the press machine is decelerated again to enter a working state when the position 50mm away from the stroke is set, the oil cylinder maintains pressure for 2S after the position reaches the designated position, pressure is released for 2S immediately and then the press machine returns, and the operation is finished;

when the pressing position of the novel material is unknown, the fine adjustment is carried out by pressing a fine adjustment button when a fine adjustment gear is selected, and then the press is pressed down by 0.5-0.6 mm.

The invention has the beneficial effects that: the invention ensures that the position control precision and the repeating precision of the hydraulic oil cylinder are more accurate, improves the yield and the efficiency of the sectional material, reduces the secondary adjustment and repair of workers on the pressed sectional material, has high automation degree of the whole equipment, improves the performance of the equipment and reduces the labor intensity of the workers.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram of a 200T press servo valve control;

FIG. 2 is an electrical servo wiring diagram of a 200T press;

fig. 3 is a hydraulic schematic diagram of a 200T press.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.

Control technique

According to the invention, the Tianjin tetragonal low-friction oil cylinder is adopted, the American MTS high-precision displacement sensor is arranged in the oil cylinder, the displacement feedback is more accurate, and the Atos DLHZO-TEZ-D-SN-EI-040-L33-I servo valve of the hydraulic system is provided with the integrated shaft controller for detecting and controlling the extending length of the oil cylinder and feeding back the pressure of the rod cavity and the rodless cavity of the oil cylinder.

The system is communicated with a DLHZO-TEZ-D-SN-EI-040-L33-I servo valve through an Ethernet IP through a PLC, compared with the traditional analog quantity control mode, the system is more accurate, the data anti-interference performance is strong, the system is provided with position control and pressure control at the same time, a control target can be switched without interference, when the pressure does not reach a set value, the position control is carried out, an oil cylinder is controlled according to the set position of the system, when the pressure reaches the set value, the automatic switching is carried out, and the pressure control oil cylinder is controlled according to the set pressure of the system, as shown in figure 1.

Secondly, the 200T single-column hydraulic press ensures the high efficiency and stability of the profile molding mainly through two control modes, as shown in figures 2 to 3.

1. Accurate position control:

the telescopic distance of the hydraulic oil cylinder is controlled through high-precision position control, the no-load error of the control precision is less than 0.1 mm, and the repetition error of the control precision is less than 0.5 mm when the hydraulic oil cylinder is loaded.

1.1 pressure control:

and when the system pressure reaches the set pressure, the oil cylinder stops pressing down through the telescopic position of the pressure no-load oil cylinder, so that the profile is ensured to be molded.

1.2 efficient position control mode:

the design adopts an automatic control mode, and the equipment has 3 selected gears which are inching, automatic and fine-tuning respectively.

In the click state, the pressing button is pressed, the oil cylinder extends downwards, the pressing button stops when the hand is loosened along with pressing, the return button is pressed, the oil cylinder retracts, and the pressing button stops when the hand is loosened along with pressing.

When the point motion selection is switched to the automatic operation, the oil cylinder retracts to the initial position, after the position parameters to be lowered are set, the oil cylinder 1 and the oil cylinder 2 are pressed down at the same time, the descending speed of the oil cylinder is reduced to enter the slow down state when the position parameters to be lowered are set, the press machine is decelerated again to enter the working state when the position 50mm away from the stroke is reached, the oil cylinder maintains pressure for 2S after the specified position is reached, pressure is released for 2S immediately and then the press machine returns, and the operation is completed. The equipment action is simpler and smoother, the section forming time is reduced, and the working efficiency is increased.

1.3 high-precision adjustment mode:

the design newly increases the mode of fine setting, when novel material still does not know the suppression position, can adopt the mode of fine setting, presses down 0.5-0.6mm after the fine setting button when selecting the fine setting gear. The position control is more accurate, the repeated adjustment time is saved, and the waste caused by overlarge pressing is avoided.

1.4 better data acquisition:

the table for collecting positions and time is arranged in the touch screen, so that the pressing distance required by profile forming can be better known.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.