CN201083660Y - Band steel bending test apparatus - Google Patents

Abstract

The utility model discloses a band steel bending testing device which comprises: a frame, wherein, relative positions on the upper end and the lower end of the frame are respectively provided with a band steel fixing device, one of the two band steel fixing devices can move up and down; at least two pairs of fixed rolls arranged on the frame, wherein the fixed rolls are arranged with the band steel fixing devices in centration; a pair of flexible rolls arranged on the frame between the two pairs of fixed rolls; and a driving device which is connected with the flexible rolls and pushes the flexible rolls to make reciprocating motion. The device can effectively simulate conditions in the field, can repeatedly make bending tests, can adjust the bending diameter according to concrete conditions, and inspect the bending-resistant state of the band steel and welding gaps of the band steel under different bending diameters.

Description

Strip bending test device

technical field

The utility model relates to steel material test equipment, in particular to a bending test device for cold-rolled strip steel.

Background technique

Baosteel’s 1550 pickling mill was originally designed to produce cold-rolled sheets and low-to-medium-grade electrical steel (silicon content controlled below 1.4%). With the continuous expansion of the product specifications of the unit, the grades of electrical steel produced by the unit are constantly increasing. However, with the increase of the silicon content, the risk of belt breakage of the unit is constantly increasing. Units producing electrical steel at home and abroad are equipped with gas burner edge heating devices at the strip edge of the uncoiler and looper, but the 1550 acid rolling unit cannot carry out the above-mentioned improvements. In the case of no change in the equipment of the unit, it is necessary for the development strategy to try to produce high-grade electrical steel. Under what process conditions can the strip pass through the unit safely is a problem that we must consider.

Under what radius of curvature does the high-grade electrical steel produce edge cracks, how many times of repeated bending will the strip break, and how the weld seam itself is resistant to bending. These problems must be inspected and adjusted before production and during the production process. . For this reason, it is necessary to design a bending test device to solve the above problems.

Contents of the invention

The purpose of this utility model is to provide a strip bending test device, which can effectively simulate the situation on site, and can repeatedly perform bending tests. Bending resistance at bending radius.

The purpose of this utility model is achieved in this way: a strip steel bending test device includes a frame, and a strip steel fixing device is respectively installed on the relative positions of the upper and lower ends of the frame, and one of the strip steel fixing devices can move up and down ; At least two pairs of fixed rollers are installed on the frame, and the fixed rollers are centered with the strip steel fixing device; a pair of movable rollers are installed on the frame between the two pairs of fixed rollers; a driving device is connected with the movable rollers, Push the movable roller to do reciprocating motion.

Preferably, the strip steel fixing device is a fixing clamp.

Preferably, the fixed rollers are symmetrically installed in the frame through bearing seats.

Preferably, the driving device is a pair of motors, respectively connected to a movable roller.

Preferably, the output end of the motor is connected to a driving screw through a coupling, and the driving screw passes through a slider connected to the movable roller, and the movable roller is placed on the frame chute.

Preferably, the motor is a variable frequency motor connected with a control unit.

Preferably, the movable strip steel fixing device is a fixing clamp at the lower end of the frame.

Preferably, a counterweight device is provided at the lower end of the frame, an elastic element is provided between the counterweight device and the lower baffle plate of the frame, and the fixing clamp at the lower end of the frame is fixedly connected to the counterweight device.

Preferably, a staircase is also installed on the frame.

Compared with the prior art, the utility model has the following advantages and positive effects due to the adoption of the above technical scheme:

A) It can simulate the situation on site, and the bending test can be carried out repeatedly. The bending radius can be adjusted according to the specific situation, so as to test the strength and edge cracks of the strip under different bending radii.

B) The constant tension and variable tension control of the strip during the bending test can be realized through the counterweight and elastic components.

C) It can not only test the bending resistance of the strip itself, but also the bending resistance of the strip weld.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

Fig. 2 is the right side view of Fig. 1 .

Detailed ways

This device is the embodiment of the present invention on probation with 1550 pickling mills:

The device includes a frame 1, a fixed roller 2, a movable roller 3, a fixed clamp 4 at the upper part of the steel strip, a fixed clamp 5 at the lower part of the strip steel, a counterweight 6, a compression spring 7, an inverter motor 8, a driving screw rod 9, a shaft coupling 10 and Control cabinet 11, slider 12, boss 13, guide rod 14, chute 15, strip steel 16, stairs 17, lower baffle plate 18.

As shown in Figures 1 and 2, the device includes a frame 1, and the top of the frame 1 is fixed with a band steel upper fixing clamp 4, which can push the movable block to clamp the band steel 16 by adjusting bolts. The bottom of frame 1 is equipped with counterweight 6, and a band of steel bottom fixed clamps 5 is installed on counterweight 6, and fixed clamps 5 can move up and down with counterweight 6, and the installation position of fixed clamps 5 is corresponding to the installation position of fixed clamps 4, Promote movable block clamping band steel 16 by adjusting bolt equally. The two ends of the counterweight 6 are fixedly connected to a pair of compression springs 7, the upper end of which is limited by the lower baffle 18 of the frame, and the compression spring 7 is sleeved on a guide rod 14, which extends into the opening of the lower baffle 18. In the hole, it can move up and down, and the upper end of the guide rod 14 is provided with a nut to prevent it from falling. The weight of the counterweight 6 acts on the steel strip 16, which is equivalent to giving a constant tension to the steel strip 16, while the compression spring 7 gives the steel strip 16 a variable tension.

Two pairs of fixed rollers 2 are installed inside the frame 1, a total of 4, which are fixed on the frame 1 through bearing seats and arranged symmetrically. There is a certain gap between the fixed rollers 2, and the strip steel 16 extends therefrom.

Between the two pairs of fixed rollers 2, a pair of movable rollers 3 are arranged, and the two ends of the movable rollers 3 are respectively installed in a chute 15 of the frame 1, and a slide block 12 is respectively arranged on the movable rollers 3. The left and right sides of the frame 1 are respectively provided with two bosses 13 on which driving devices are installed, which are two pairs of frequency conversion motors 8 in this embodiment. The variable frequency motor 8 is connected with a driving screw 10 through a coupling 9, and the driving screw 10 is extended into and fixed in the shaft sleeve 12, and the movable roller 3 is driven to reciprocate in the chute 15 of the frame 1 through the action of the variable frequency motor 8 sports. The variable frequency motor 8 is controlled by a control cabinet 11 .

A staircase 17 is also installed on the frame 1, which is convenient for operators to maintain.

The total height of the device of this embodiment is 3470mm.

There are four fixed rollers 2 arranged symmetrically, leaving a certain gap m=10mm between the rollers 2, and the diameter of the rollers 2 is 250mm.

After the strip steel 16 passes through the upper part of the frame 1 from the fixed roller 2, the lower part of the strip steel 16 is clamped by the lower fixed clamp 5 fixed on the counterweight 6, and the upper part of the strip steel 16 is clamped by the fixed clamp 4 fixed on the frame 1. Clamp. In the present embodiment, the weight 2T of the counterweight 6 is applied on the steel strip 16, which is equivalent to giving the steel strip 16 a constant tension of 2T;

The variable frequency motor 8 is controlled by the control cabinet 11, and the 7.5KW variable frequency motor 8 is connected to the driving screw 9 through the coupling 10, and the movable roller 3 is driven to move in the chute 15 of the frame 1 through the action of the variable frequency motor 8, thereby Make strip steel 16 realize repeated bending.

Claims (9)

1. A strip steel bending test device is characterized in that: comprise a frame, install a strip steel fixing device respectively on the upper and lower ends relative positions of the frame, wherein a strip steel fixing device can move up and down; at least two pairs The fixed roller is installed on the frame, and the fixed roller is set in the middle of the strip steel fixing device; a pair of movable rollers is installed on the frame between the two pairs of fixed rollers; a driving device is connected with the movable roller to push the movable roller to make reciprocating motion. 2. The strip steel bending test device according to claim 1, wherein the strip steel fixing device is a fixed clamp. 3. The strip bending test device according to claim 2, characterized in that: said fixed rollers are symmetrically installed in the frame through bearing seats. 4. The strip bending test device according to claim 3, characterized in that: the driving device is a pair of motors, respectively connected to a movable roller. 5. The strip steel bending test device as claimed in claim 4, characterized in that: the output end of the motor is connected with a driving screw through a coupling, and the driving screw passes through a slide block connected with the movable roller Inside, the active rollers are placed on the frame chute. 6. The strip bending test device according to claim 5, wherein the motor is a variable frequency motor connected with a control unit. 7. The strip bending test device according to claim 6, characterized in that: the movable strip fixing device is a fixing clamp at the lower end of the frame. 8. The strip steel bending test device as claimed in claim 7, characterized in that: the lower end of the frame is provided with a counterweight device, an elastic element is arranged between the counterweight device and the lower baffle plate of the frame, and the fixing of the lower end of the frame The tongs are fixedly attached to the counterweight. 9. The strip steel bending test device according to claim 8, characterized in that: a staircase is also installed on the frame.

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