Brake device and uncoiler using same

Abstract

The utility model relates to the field of uncoiler equipment, in particular to a brake device and an uncoiler using the brake device, which comprises a brake wheel disc, a brake component matched with the brake wheel disc to realize friction speed reduction, and a driving device used for driving a brake to act, the brake wheel disc rotates along with a rotating piece of the machine; the brake assembly comprises a first brake and a second brake, the first brake always keeps frictional contact with the brake wheel disc, and the second brake only keeps frictional contact with the brake wheel disc when braking is needed; the first brake acts on the brake wheel disc when the machine works. When braking is needed, the second brake acts immediately, friction force is applied to the braking wheel disc, the braking system can effectively shorten the braking period of the braking device, and the problem of scratching or scratching between adjacent steel belt faces caused by the long braking period is relieved or avoided to a great extent by applying the braking device to the uncoiler.

Description

Technical Field

[0001] The utility model relates to the technical field of uncoiler equipment, in particular to a braking device and an uncoiler using the braking device. Background Art

[0002] At present, steel strips are widely used in construction, automobiles, home appliances and other industries. However, due to different occasions of use, the steel strips themselves have different requirements for size. In order to meet different size requirements, it is necessary to uncoil, slitting and reel the steel strip blanks according to the customer's size requirements. In the daily production process, slitting is generally performed directly after uncoiling, and the steel strips after slitting are directly reeled. The uncoiling of the steel strip is completed by the steel strip uncoiler.

[0003] The steel strip uncoiler in the prior art has the following problems: during normal operation, the roller of the steel strip uncoiler stops rotating under the action of the brake device, but due to the large inertia of the roller and the long braking cycle, after the brake device is actuated, the roller often cannot stop rotating immediately, and will continue to rotate half a circle to one circle, so that the steel strip will be unwound, and stacking faults will occur between the unwound steel strips, which will cause abrasions or scratches between adjacent steel strip surfaces, affecting the quality of the steel strip products. This application is dedicated to improving the above technical problems. Utility Model Content

[0004] In view of the problems existing in an existing braking device and an uncoiler using the braking device, the utility model is proposed.

[0005] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0006] A braking device and an unwinding machine using the braking device, comprising a brake wheel disc, a brake assembly for cooperating with the brake wheel disc to achieve friction deceleration, and a driving device for driving the brake to operate; the brake wheel disc rotates following the rotating part of the machine;

[0007] The brake assembly includes a first brake and a second brake, wherein the first brake always keeps friction contact with the brake wheel disc, and the second brake keeps friction contact with the brake wheel disc only when braking is required.

[0008] As a preferred solution of the braking device and the uncoiler using the braking device described in the utility model, the first brake and the second brake are both arranged on the edge of the brake disc.

[0009] As a preferred solution of the braking device and the uncoiler using the braking device described in the utility model, wherein: the driving device is a pneumatic driving device.

[0010] As a preferred solution of the braking device and the uncoiler using the braking device described in the utility model, a plurality of through holes for reducing the deadweight are opened on the circumference of the brake wheel disc.

[0011] As a preferred solution of a braking device and an uncoiler using the braking device described in the utility model, wherein: the first brake and the second brake are both air-pressure butterfly brakes.

[0012] A uncoiler adopts the above-mentioned braking device; the brake disc of the braking device is fixedly connected to one end of the roller shaft of the uncoiler.

[0013] Compared with existing technologies:

[0014] In the design of the utility model, the first brake acts on the brake disc at the beginning of the machine operation, that is, the brake disc is always subjected to the friction resistance from the first brake during normal rotation. When braking is required, the second brake is immediately activated to apply friction to the brake disc, and the brake disc stops rotating under the joint action of the first brake and the second brake. The braking system can effectively shorten the braking cycle of the braking device. By applying the above-mentioned braking device in the uncoiler, the problem of abrasion or scratching between adjacent steel strip surfaces caused by a long braking cycle can be alleviated or avoided to a large extent;

[0015] By opening a through hole on the brake disc, the deadweight of the brake disc can be effectively reduced, thereby reducing the rotational inertia of the brake disc and making braking easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a schematic diagram of the structure of the braking device in the embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of the overall structure of the uncoiler in the embodiment of the utility model.

[0018] Description of labels:

[0019] Brake wheel 1, first brake 2, second brake 3, through hole 4, air pipe 5, drive motor 6, frame 7. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clear, the implementation methods of the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] The utility model provides a braking device and an unwinding machine using the braking device. Figure 1-2 ,include.

[0022] See also Figure 1 to Figure 2 .

[0023] Embodiment 1:

[0024] See also Figure 1 The present embodiment provides a braking device, including a brake disc 1, a brake assembly for cooperating with the brake disc 1 to achieve friction deceleration, and a driving device for driving the brake to operate; the brake disc 1 rotates following the rotating parts of the machine; the brake assembly includes a first brake 2 and a second brake 3, the first brake 2 always maintains friction contact with the brake disc 1, and the second brake 3 maintains friction contact with the brake disc 1 only when braking is required.

[0025] In this scheme, the first brake 2 acts on the brake disc 1 at the beginning of the machine operation, that is, the brake disc 1 is always subjected to the friction resistance from the first brake 2 during normal rotation. When braking is required, the second brake 3 immediately acts to apply friction to the brake disc 1, and the brake disc 1 stops rotating under the joint action of the first brake 2 and the second brake 3. The first brake 2 and the second brake 3 are both pneumatic butterfly brakes. This braking system can effectively shorten the braking cycle of the braking device, and to a large extent alleviate or avoid the problem of abrasion or scratches between adjacent steel belt surfaces caused by a long braking cycle.

[0026] The specific analysis is as follows:

[0027] The mass of the rotating unit to be braked (including the brake disc 1 and the roller) is set to M. Braking begins when the rotating unit speed is v, and the response time of the brake is t1.

[0028] (1) Before the improvement, there was only one brake, the braking force on the brake disc 1 was F, the response time was t1, and the time interval from the actual braking start to the complete stop of the rotation of the brake disc 1 was t2. The following equation can be obtained:

[0029]

[0030] (2) The braking forces of the improved first brake 2 and the second brake 3 are F1 and F2 respectively, and it is assumed that F1 and F2 satisfy the following relationship:

[0031] F=F1+F2 (ii)

[0032] The improved braking cycle is divided into two sections. Since the first brake 2 always maintains friction contact with the brake disc 1 and the braking force is kept at F1, the first brake 2 brakes first and has no response time. The second brake 3 has a response time t1, and the time interval from the actual braking of the second vibrator to the complete stop of the rotation of the brake disc 1 is t3. The following equation can be obtained:

[0033]

[0034] From (ii) and (iii), we can get:

[0035] From (i) and (iii), we can get: F(t2-t3) = F1t1(v)

[0036] Because F1t1 and F are both greater than 0, t2-t3>0, that is, t2>t3. It can be seen that the actual braking time after improvement is shorter than the braking time before improvement, which verifies the beneficial effect that the braking system of the present application can effectively shorten the braking cycle of the braking device.

[0037] In this embodiment, the first brake 2 and the second brake 3 are both arranged at the edge of the brake disc 1. By setting, the first brake 2 and the second brake 3 are both arranged at the edge of the brake disc 1, which can increase the torque of the braking force, thereby improving the braking capacity and braking effect of the first brake 2 and the second brake 3.

[0038] In this embodiment, the driving device is a pneumatic driving device (not shown in the drawings). The pneumatic driving device is drivingly connected to the first brake 2 and the second brake 3 through the air pipe 5. There are many pneumatic driving devices in the prior art, which will not be described here.

[0039] In this embodiment, a plurality of through holes 4 for reducing the deadweight are provided on the circumference of the brake wheel disc 1. By setting, by providing the through holes 4 on the brake wheel disc 1, the deadweight of the brake wheel disc 1 can be effectively reduced, thereby reducing the rotational inertia of the brake wheel disc 1, making it easier to brake.

[0040] Example 2

[0041] See also Figure 2 , a uncoiler adopts the above-mentioned braking device; the cross-coiler includes a frame 7, a roller shaft and a driving motor 6 for driving the roller shaft to rotate to achieve uncoiling, a brake disc 1 of the braking device is arranged on one side of the frame 7 and is fixedly connected to one end of the roller shaft of the uncoiler, the driving motor 6 is fixedly installed on the top of the frame 7 through a mounting base, and is connected to the roller shaft driving through a belt transmission assembly.

[0042] By adopting the braking device in Example 1, the braking time of the uncoiler in this embodiment is effectively shortened, thereby alleviating or avoiding the problem of abrasion or scratching between adjacent steel strip surfaces caused by a long braking cycle to a great extent.

[0043] In summary, in the design of the braking device of the utility model, the first brake 2 acts on the brake disc 1 at the beginning of the machine operation, that is, the brake disc 1 is always subjected to the friction resistance from the first brake 2 during normal rotation. When braking is required, the second brake 3 immediately acts to apply friction to the brake disc 1, and the brake disc 1 stops rotating under the joint action of the first brake 2 and the second brake 3. The braking system can effectively shorten the braking cycle of the braking device; by applying the above-mentioned braking device in the uncoiler, the problem of abrasion or scratches between adjacent steel strip surfaces caused by a long braking cycle is alleviated or avoided to a great extent. Therefore, the utility model effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0044] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A braking device, characterized in that: It comprises a brake wheel disc (1), a brake assembly for cooperating with the brake wheel disc to achieve friction deceleration, and a drive device for driving the brake to operate; the brake wheel disc (1) rotates following the rotating part of the machine; The brake assembly comprises a first brake (2) and a second brake (3), wherein the first brake (2) always maintains frictional contact with the brake wheel disc (1), and the second brake (3) maintains frictional contact with the brake wheel disc (1) only when braking is required.

2. A braking device according to claim 1, characterized in that: The brake wheel disc (1) is provided with a plurality of through holes (4) on its circumference for reducing its own weight.

3. A braking device according to claim 1, characterized in that: The first brake (2) and the second brake (3) are both arranged on the edge of the brake disc (1).

4. A braking device according to claim 1, characterized in that: The driving device is a pneumatic driving device.

5. A braking device according to claim 1, characterized in that: The first brake (2) and the second brake (3) are both pneumatic butterfly brakes.

6. An unwinding machine, characterized in that: A braking device as described in any one of claims 1 to 5 is used; the brake disc (1) of the braking device is fixedly connected to one end of the roller shaft of the uncoiler.

Images