CN201387416Y - CNC Plate Bending Formability Testing Machine - Google Patents

Abstract

The utility model relates to a numerically controlled plate bending forming performance testing machine, comprising: a hydraulic frame part, the hydraulic frame adopts a three-beam and four-column structure, a main oil cylinder is fixed above an upper beam, and a force sensor and an upper mold base are installed at the lower end of a piston rod of the main oil cylinder. There is a T-shaped groove on the middle beam; the hydraulic station is composed of a hydraulic pump, a reversing valve and a proportional valve. The hydraulic pump is connected to the proportional valve, a reversing valve and the main cylinder through a hydraulic pipe; Die, mold base, lead screw, guide rail; Among them, the lead screw is divided into two sections of threads with different rotation directions from the middle; the detection and control system is composed of a control box, an industrial computer, a display, a force sensor, a displacement sensor, and a stepping motor. The force sensor is installed at the lower part of the main cylinder piston, the displacement sensor is installed under the upper beam, the stepper motor is installed on the mold base and connected to the lead screw, the industrial computer is connected to the control box through the data line, and the display is used to display the current operation status of the industrial computer. and parameters.

Description

CNC Plate Bending Formability Testing Machine

technical field

The utility model relates to a numerically controlled sheet material bending formability testing machine, which refers to a test device capable of completing the metal sheet bending performance test and belongs to the technical field of sheet material formability testing machines.

Background technique

Bending test is the most commonly used method to evaluate the bending performance of plates. Since many parts on aircraft and automobiles are formed by stamping and bending, how to correctly evaluate the bending properties of plates has important practical significance. All companies have formulated corresponding bending test standards, and our country is no exception. However, at present, domestic bending tests are usually carried out on single-tension testing machines or ordinary hydraulic machines in accordance with national standards, and the molds used are relatively simple, so there are disadvantages such as cumbersome operation and low precision, which are mainly reflected in: 1) The opening of the bending die needs to be Manual adjustment is inefficient; 2) The pressing stroke of the punch cannot be accurately controlled, resulting in the inability to guarantee the accuracy of the bending angle; 3) The load and stroke curve of the punch cannot be obtained; 4) It is not easy to remove the test piece after the test.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the current bending test process, to provide a computer-controlled numerical control plate bending forming performance testing machine, to realize the automatic bending test process, and to maximize the efficiency of the bending test and the accuracy of the bending test , and the data curve of punch load and stroke can be obtained.

The utility model is a bending performance testing machine, which specifically comprises:

(1) The hydraulic frame part. The hydraulic frame adopts a three-beam and four-column structure. The main oil cylinder is fixed above the upper beam. There is an interface at the lower end of the piston rod of the main oil cylinder for installing the force sensor and the upper mold base. Used to install molds.

(2) The hydraulic station is composed of a hydraulic pump, a reversing valve and a proportional valve. The hydraulic pump is connected to the proportional valve, the reversing valve and the main cylinder through hydraulic pipes to provide power for the system.

(3) Mold, including bending punch, bending die, mold base, screw, guide rail. Wherein, the lead screw is divided into two sections of threads with different rotation directions from the middle part, and the stepping motor drives the lead screw to rotate, so that the bending die installed on the lead screw produces opposite opening and closing movement.

(3) The detection and control system consists of a control box, an industrial computer, a display, a force sensor, a displacement sensor, and a stepping motor. The force sensor is installed on the lower part of the main oil cylinder piston, the displacement sensor is installed under the upper beam, and the stepper motor is installed on the mold base and connected with the lead screw. The industrial computer is connected to the control box through the data line to detect and control the operation of the entire testing machine in real time, and the display is used to display the current operating status and parameters of the industrial computer. Wherein, the control box includes a data acquisition card, a control card, a PLC (programmable controller), etc., wherein the data acquisition card is respectively connected with the displacement sensor, the force sensor and the industrial computer through the data line, and the control card is respectively connected with the industrial computer, the industrial computer, and the industrial computer through the data line. The PLC, the stepper motor, and the proportional valve are connected, and the PLC is further connected with the reversing valve. The signals collected by the force sensor and the displacement sensor are transmitted to the industrial computer through the control box, and the control box receives the instructions from the industrial computer to control the operation of the hydraulic station, the main cylinder and the stepping motor. The speed of the main oil cylinder piston is controlled by the industrial computer through the control card and the proportional valve, and all signal transmissions are carried out through the data line.

The utility model is a bending testing machine, which has the advantages and effects that it can conveniently realize automatic bending testing and provide complete testing data for sheet metal forming and processing.

Description of drawings

Fig. 1 is a structural diagram of a numerically controlled plate bending formability testing machine of the present invention.

Figure 2 is a top view of the bending die part.

Figure 3 Schematic diagram of the hardware composition and structure of the detection control system

Figure 4 control software flow chart

The specific labels in the figure are as follows:

1. Main oil cylinder 2. Main oil cylinder piston rod 3. Displacement sensor 4. Bending punch 5. Test piece 6. Lead screw 7. Die holder 8. Guide rail 9. Lower beam 10. Upper beam 11. Force sensor 12. Upper die Seat 13. Column 14. Bending Die 15. Stepper Motor 16. Middle Beam 17. Hydraulic Station 18. Proportional Valve 19. Hydraulic Pump 20. Reversing Valve 21. Control Box 22. Data Acquisition Card 23. Control Card 24. PLC 25. Industrial computer 26. Display

Detailed ways

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

In Fig. 1, the hydraulic frame is composed of an upper beam 10, a middle beam 16, a lower beam 9 and four columns 13, the main oil cylinder 1 is fixed above the upper beam 10, and the lower end of the piston rod 2 of the main oil cylinder has an interface for installing a force sensor 11 And patrix 12, patrix 12 lower ends are used for installing bending punch 4, and T-shaped groove is arranged above middle beam 16, is used for installing mould.

In Fig. 1, the hydraulic station 17 is composed of a hydraulic pump 19, a reversing valve 20, and a proportional valve 18. The hydraulic pump 19 is respectively connected with the proportional valve 18, the reversing valve 20 and the main cylinder 1 through hydraulic pipes to control the up and down movement of the main cylinder 1. , to power the system.

Mold among Fig. 1 and Fig. 2, comprises bending punch 4, bending die 14, die base 7, leading screw 6, guide rail 8, stepper motor 15. Bending die 14, lead screw 6, guide rail 8, and stepping motor 15 are all installed on the mold base 7, lead screw 6 and bending die 14 are threaded fit, and the opening and closing movement of bending die 14 is driven by the rotation of lead screw, The guide rail 8 is in plane contact with the bending die 14, and its function is to ensure the straightness of the movement of the bending die 14. The screw 6 is divided into two sections of threads with different rotation directions from the middle part, and the stepping motor 15 drives the screw 6 to rotate, so that the installation The two parts of the bending die 14 on the leading screw 6 and the guide rail 8 produce opposite linear opening and closing motions.

The detection control system in Fig. 1 is made up of control software (flow chart sees Fig. 4), control box 21, industrial computer 25, display 26, force sensor 11, displacement sensor 3, stepper motor 15 etc. The force sensor 11 is installed on the lower part of the main oil cylinder piston 2, and directly measures the load of the bending punch 4 installed on the piston rod. The displacement sensor 3 is installed under the upper beam 10, and the stepper motor 15 is installed on the bending die base 7 and connected with it. Lead screw 6 is connected. Industrial computer 25 is connected with control box 21 by data line, and the operation of whole testing machine is carried out real-time detection and control, and display 26 is used for displaying current industrial computer operation state and parameter; Control box 21 (seeing Fig. 3) comprises data acquisition card 22 , control card 23, PLC (programmable logic controller) 24 etc., wherein data acquisition card 22 is respectively connected with displacement sensor 3, force sensor 11 and industrial computer 25 by data line, and control card 23 is respectively connected with industrial computer 25, industrial computer 25 by data line The PLC24, the stepper motor 15, and the proportional valve 18 are connected, and the PLC24 is further connected with the reversing valve 20. The signals collected by the force sensor 11 and the displacement sensor 3 are transmitted to the industrial computer 25 through the control box 21, and the control box 21 receives instructions from the industrial computer 25 to control the operation of the hydraulic station 17, the main cylinder 1 and the stepping motor 15. The speed of the main oil cylinder piston 2 is controlled by the industrial computer 25 through the control card 23 and the proportional valve 18, and all signal transmissions are carried out through data lines. The specific connection lines are shown in FIG. 3 .

Sheet metal bending formability test mainly has the following actions:

●Run the control software, set the plate thickness, bending radius and other parameters, click OK;

The industrial computer sends instructions to control the stepper motor to drive the screw to automatically adjust the opening of the die;

●Place the test piece on the die;

●Set parameters such as bending angle and punch speed, and start the test;

●The piston of the main oil cylinder goes down, and the punch works;

●The specimen bends and deforms successfully or breaks, when the test is over, the piston of the main cylinder drives the punch upward;

●The stepper motor drives the lead screw to make the opening of the die larger;

●Remove the test piece, the test is over;

The above-mentioned actions are all accomplished by controlling the hydraulic valve and the stepping motor.

Claims (2)

1, a kind of numerical control sheet material bending and forming property test machine, this testing machine specifically comprises:

Hydraulic pressure rack section, hydraulic pressure frame adopt three beam four-column type structures, and master cylinder is fixed in entablature top, and there is interface main oil cylinder piston bar lower end, is used for installing force sensor and upper bolster, and T-slot is arranged above the middle cross beam, are used for installation mold;

Hydraulic Station is made up of hydraulic pump, reversal valve, proportioning valve, and hydraulic pump links to each other with proportioning valve, reversal valve and master cylinder respectively by hydraulic tube, for system provides power;

Mould part comprises crooked punch, crooked die, die holder, leading screw, guide rail; Wherein, leading screw is the screw thread of two sections different rotation directions partly therefrom; It is characterized in that: this testing machine further comprises:

Detect control system, form by control box, industrial computer, display, force transducer, displacement transducer, stepper motor, force transducer is installed in the main oil cylinder piston bottom, displacement transducer is installed on the entablature below, stepper motor is installed on the die holder and with leading screw and is connected, and industrial computer is connected with control box by data line.

2, a kind of numerical control sheet material bending and forming property test machine according to claim 1, it is characterized in that: described control box comprises data collecting card, control card, PLC, wherein data collecting card is connected with displacement transducer, force transducer and industrial computer respectively by data line, control card is connected with industrial computer, PLC, stepper motor, proportioning valve respectively by data line, and PLC also further is connected with reversal valve.

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