CN206509347U - A kind of almag extruder extrusion speed control and measuring system - Google Patents

Abstract

The utility model provides a kind of almag extruder extrusion speed control and measuring system, is related to technical field of automatic control.The system includes digital hydraulic table, display screen, one-chip computer module, electrical-liquid control pump, capacitor grid transducer and extruder；Described capacitor grid transducer includes dynamic chi sliding block and scale, moves chi slide block set on scale, scale is fixed on the graduated scale disk of extruder；When described squeeze cylinder work is entered, the movable pointer on extruder promotes dynamic chi sliding block, and the displacement information of dynamic chi sliding block is sent to one-chip computer module by capacitor grid transducer, while the operating pressure data of squeeze cylinder is sent to one-chip computer module by digital hydraulic table；One-chip computer module is compared according to real-time pressure and speed data with the pressure and speed data set, draws amendment data and output control electric current, by the hydraulic oil output quantity of current control electrical-liquid control pump, realizes the control of extruder extrusion speed and measurement.The system architecture is simple, easy for installation, with low cost.

Description

An extrusion speed control and measurement system for an aluminum-magnesium alloy extrusion machine

technical field

The utility model relates to the technical field of automation control, in particular to an extrusion speed control and measurement system for an aluminum-magnesium alloy extrusion machine.

Background technique

The extrusion machine produced in the early stage did not have an extrusion speed measuring device, and was usually equipped with a scale and a movable pointer to observe the extrusion position and progress. The scale is fixed on the guide rail of the main cylinder of the extrusion machine, and the movable pointer is connected to the crossbeam of the extrusion rod. For occasions with low requirements, one-person operation and one-person observation cooperation can be adopted. The extrusion speed can be preliminarily judged by observing the moving speed of the movable pointer, and the extrusion speed can be ensured by adjusting the current. However, under different conditions, the extrusion speed of the same current is not the same; even in the same extrusion process, the extrusion force is constantly changing, especially at the beginning and end of the moment, the extrusion force and extrusion speed change rapidly, artificial adjustment The stability of the extrusion speed cannot meet the requirements of experiments and production. From the perspective of improving the process level and efficiency, it is necessary to install a speed control system on the extruder.

At present, the displacement measurement devices used in extrusion machines are mainly laser displacement sensors, and there are also patents that use magnetostrictive sensors and photoelectric encoders to measure displacement and speed. For example, in the Chinese patent "System and Method for Extrusion Machine Speed Control" (CN200910159302.2), one end of the tape measure is fixed on the extrusion shaft and the other end is wrapped around the pulley to convert linear motion into rotary motion. Rate calculates the extrusion rate. The advantage is that it is more convenient to measure the rotation rate, but after the movement mode is converted, the speed measuring device takes up a lot of space and the structure is more complicated. In the Chinese patent "A digital hydraulic extrusion machine speed control system and method" (CN201010132158.6), the magnetostrictive sensor is used to measure the speed, which has the characteristics of high precision, reliable stability, long life and convenient installation. But the cost is high for ordinary users. The speed control unit in the above patents usually adopts a PLC module. These devices are expensive, inconvenient to install, or require major changes to the original equipment.

Utility model content

The purpose of this utility model is to provide an extrusion speed control and measurement system for an aluminum-magnesium alloy extrusion machine to solve the problems of complex structure, unchanged installation and high cost of the existing extruder speed control and measurement system.

The utility model provides an extrusion speed control and measurement system for an aluminum-magnesium alloy extrusion machine, the system includes a digital hydraulic gauge, a display screen, a single-chip microcomputer module, an electro-hydraulic proportional control pump, a capacitance sensor and an extrusion machine;

One end of the digital hydraulic gauge is connected to the extrusion cylinder on the extruder, and the other end is connected to the single-chip microcomputer module;

The display screen is connected with the single-chip microcomputer module;

One end of the electro-hydraulic proportional control pump is connected to the extrusion cylinder on the extruder, and the other end is connected to the single-chip microcomputer module;

The capacitive sensor includes a moving ruler slider and a fixed ruler, the movable ruler slider is set on the fixed ruler, and the fixed ruler is fixed on the scale disc of the extruder; one end of the capacitive sensor is connected to the single-chip microcomputer module;

When the extrusion cylinder is working, the movable pointer on the extrusion machine pushes the sliding block of the moving ruler, and the capacitive sensor transmits the displacement information of the sliding block of the moving ruler to the single-chip microcomputer module, and at the same time, the digital hydraulic gauge transmits the working pressure of the extrusion cylinder. The data is sent to the single-chip microcomputer module; the single-chip microcomputer module compares the real-time pressure and speed data with the set pressure and speed data, obtains the corrected data and outputs the control current, controls the hydraulic oil output of the pump through the current control electro-hydraulic ratio, and realizes squeezing Press extrusion speed control and measurement.

The beneficial effects of the utility model:

The utility model provides an extrusion speed control and measurement system for an aluminum-magnesium alloy extrusion machine. The system has a simple structure, takes up little space, does not need to change main equipment, is easy to install, and has low cost, and is suitable for equipment transformation and upgrading.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a block diagram of the working principle of an extrusion speed control and measurement system for an aluminum-magnesium alloy extrusion machine of the present invention.

Fig. 2 is an installation diagram of the capacitive sensor of the extrusion speed control and measurement system of an aluminum-magnesium alloy extrusion machine of the present invention.

In the figure 1. Scale, 2. Movable pointer, 3. Slider of moving ruler, 4. Fixed scale, 5. Digital hydraulic gauge, 6. Display, 7. Single-chip microcomputer module, 8. Extrusion cylinder, 9. Electro-hydraulic Proportional control pump, 10. Capacitive grid sensor.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in further detail.

This embodiment provides an extrusion speed control and measurement system for an aluminum-magnesium alloy extrusion machine. As shown in Figure 1, the system includes a digital hydraulic gauge 5, a display screen 6, a single-chip microcomputer module 7, an electro-hydraulic proportional control pump 9, Capacitive sensor 10 and extruder;

One end of the digital hydraulic gauge 5 is connected with the extrusion cylinder 8 on the extruder, and one end is connected with the single-chip microcomputer module 7;

Described display screen 6 is connected with single-chip microcomputer module 7;

One end of the electro-hydraulic proportional control pump 9 is connected to the extrusion cylinder 8 through the hydraulic control system and the valve block on the extruder, and one end is connected to the single-chip microcomputer module 7;

The capacitive sensor 10 includes a moving scale slider 3 and a fixed scale 4. As shown in FIG. Gap, the scale 4 is fixed on the scale 1 of the extruder; and ensure that the movement range of the movable pointer 2 caused by the working process of the extrusion rod is all within the range of the scale 4 of the capacitance sensor 10, said One end of the capacitive sensor 10 is connected with the single-chip microcomputer module 7;

When the extrusion cylinder 8 is working, the movable pointer 2 on the extruder pushes the moving ruler slider 3, and the capacitive sensor 10 transmits the displacement information of the moving ruler slider 3 to the single-chip microcomputer module 7, and the real-time rate is obtained through calculation, and displayed on the display screen 6; at the same time, the digital hydraulic gauge 5 sends the working pressure data of the extrusion cylinder 8 to the single-chip microcomputer module 7; the single-chip microcomputer module 7 compares the real-time pressure and speed data with the set pressure and speed data to obtain The corrected data is output and the control current is output, and the hydraulic oil output of the pump 9 is controlled by the current control electro-hydraulic proportion, so as to realize the extrusion speed control and measurement of the extrusion machine.

The extruder described in this embodiment can also be a vertical extruder, the scale is placed vertically, the movable pointer moves vertically, the moving ruler slider and fixed ruler of the capacitive sensor are also placed vertically on the scale, other Same as described above.

Claims (1)

1. An extrusion speed control and measurement system for an aluminum-magnesium alloy extrusion machine, characterized in that the system includes a digital hydraulic gauge (5), a display screen (6), a single-chip microcomputer module (7), an electro-hydraulic proportional control pump (9), capacitance sensor (10) and extruder; One end of the digital hydraulic gauge (5) is connected with the extrusion cylinder (8) on the extruder, and one end is connected with the single-chip microcomputer module (7); Described display screen (6) is connected with single-chip microcomputer module (7); One end of the electro-hydraulic proportional control pump (9) is connected to the extrusion cylinder (8) on the extruder, and one end is connected to the single-chip microcomputer module (7); The capacitive sensor (10) includes a moving ruler slider (3) and a fixed ruler (4), the movable ruler slider (3) is sleeved on the fixed ruler (4), and the fixed ruler (4) is fixed on the extruder on the scale (1); one end of the capacitive sensor (10) is connected with the single-chip microcomputer module (7).