A prestressed open-type straightening machine frame

Abstract

The present invention belongs to the technical field of straightening equipment and relates to a prestressed opening type straightening machine frame, which includes an upper frame and a lower frame. One side of the upper frame is hinged to one side of the lower frame through a rotary unit. On the other side of the lower frame, rotary locking cylinders are symmetrically arranged longitudinally before and after. An opening cylinder is arranged on one side close to the rotary unit. The cylinder barrel of the opening cylinder is installed on the outer side of the lower frame in a hinged manner, and the first piston rod of the opening cylinder is hinged to the bottom of the upper frame. By applying forces jointly by the rotary locking cylinders and the opening cylinder, the opening type frame forms a prestressed frame structure, ensuring that the working process is more stable and reliable. At the same time, for this prestressed opening type straightening machine frame, the upper and lower frames adopt an opening type structure, which is convenient for the staff to clean and maintain the inside of the equipment, especially for cleaning and maintaining the roll box.

Description

Technical Field

[0001] The present invention belongs to the technical field of straightening equipment and relates to a prestressed open-type straightening machine frame. Background Art

[0002] With the development of the national economy and industrial technology, users have higher and higher requirements for various quality indicators of strip materials. During the rolling production of strip materials, due to inappropriate factors such as process parameters, installation level, and the shape of roll profile and roll gap, the longitudinal extension of the strip in the width direction is uneven, resulting in waves. Commonly occurring in general processes are double-sided waves, single-sided waves, intermediate waves, two-rib waves, etc., and there are even defects such as head and tail warping, side bending, dish-shaped warping, and potential bad strip shapes. If these defects are not eliminated, it will affect the deep processing of the strip and cannot meet the requirements of the developing market. Especially in recent years, with the rapid development of intelligent manufacturing, high-precision molds are used in downstream processes such as painting, coating, and stamping. Therefore, there are strict requirements for the flatness of raw materials. So, before the above-mentioned processes, it is necessary to level and straighten the defective strip materials to meet the requirements of downstream production. For existing precision straightening machines, in order to ensure the flatness of the strip, the equipment is generally set as a stable fixed structure, but this structure is not convenient for cleaning and maintaining the roll box. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide a prestressed open-type straightening machine frame. By applying forces jointly by the rotary locking cylinder and the opening cylinder, the open-type frame forms a prestressed frame structure, ensuring that the working process is more stable and reliable.

[0004] The purpose of the present invention is solved by the following technical solutions:

[0005] This prestressed open-type straightening machine frame includes an upper frame and a lower frame. One side of the upper frame is hinged to one side of the lower frame through a rotary unit. On the other side of the lower frame, rotary locking cylinders are symmetrically arranged longitudinally in the front and back. On the side close to the rotary unit, opening cylinders are symmetrically arranged in the front and back. The cylinder barrel of the opening cylinder is installed on the outside of the lower frame by means of hinge. The first piston rod of the opening cylinder is hinged to the bottom of the upper frame. The cylinder housing of the rotary locking cylinder is installed on the lower frame through an end flange.

[0006] Further, the rotary locking cylinder includes a cylinder housing. A second piston rod is arranged in the cylinder housing. A locking part is installed at the top of the second piston rod. Cam units are installed around the lower part of the second piston rod. A cam curve for restricting the movement track of the cam units is arranged on the inner wall of the cylinder housing.

[0007] Furthermore, the cam units are symmetrically distributed at the lower part of the second piston rod. The cam unit includes guide posts horizontally arranged around the lower part of the second piston rod. Bearings are installed at the ends of the guide posts. When the second piston rod extends / retracts, the bearings move along the cam curve.

[0008] Furthermore, the locking part adopts a rectangular lock plate, and the rectangular lock plate is fixedly installed at the top of the second piston rod through fasteners.

[0009] Furthermore, a rectangular lock plate position detection switch is provided at the upper frame window of the upper frame, and an upper frame position detection switch is provided on the upper surface of the lower frame at the corresponding position.

[0010] Furthermore, for each stroke of the rotary locking oil cylinder, the rotation angle of the second piston rod is 90 degrees.

[0011] Furthermore, a limiting mechanism is provided between the upper frame and the lower frame, and the limiting mechanism is arranged close to the rotary locking oil cylinder side.

[0012] Furthermore, a backlash elimination mechanism for improving the straightening accuracy is also provided between the upper frame and the lower frame, and the backlash elimination mechanism is arranged close to the slewing unit.

[0013] Furthermore, the backlash elimination mechanism includes a cylindrical shell fixedly arranged at the top of the lower frame. A disc spring group is placed in the chamber of the cylindrical shell. A stepped guide rod is arranged at the top of the disc spring group in the chamber of the cylindrical shell. The top of the cylindrical shell is fixedly connected with a gland. Through the cooperation of the gland and the cylindrical shell, the large-end side of the guide rod is constrained in the chamber of the cylindrical shell, and the top of the guide rod contacts the lower surface of the upper frame through the reaction force generated by the disc spring group.

[0014] Furthermore, an upper roll box pressing-down mechanism is provided on the upper frame, and the bottom end of the upper roll box pressing-down mechanism is fixedly connected with the upper roll box.

[0015] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: On the one hand, through the design of setting the rotary locking oil cylinder, it is beneficial to lock the working position of the upper frame during work, so that the working positions of all roll boxes remain unchanged, and the consistency of the produced strip materials is higher; through the combined force of the rotary locking oil cylinder and the opening oil cylinder, the open-type frame forms a prestressed frame structure, ensuring that the working process is more stable and reliable; at the same time, for this prestressed open-type straightening machine frame, the upper and lower frames adopt an open structure, which is convenient for the staff to clean and maintain the inside of the equipment, especially for the cleaning and maintenance of the roll boxes.

[0016] On the other hand, the rotary locking oil cylinder adopted in the frame has the advantages of simple structure, easy processing and low cost. The locking part sleeved on the top of the piston rod can automatically lock the oil cylinder at the end of the oil cylinder stroke to maintain the oil cylinder stroke. In addition, by installing a backlash elimination mechanism under the rotary unit, the clearance caused by the rotary unit can be eliminated to ensure the straightening accuracy. Brief Description of the Drawings

[0017] The drawings herein are incorporated into and constitute a part of this specification, and are used together with the specification to explain the principles of the present invention.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a structural diagram of a prestressed open-type straightening machine frame provided by the present invention;

[0020] Figure 2 It is a structural diagram of the rotary locking oil cylinder provided by the present invention;

[0021] Figure 3 It is a structural diagram of the backlash elimination mechanism provided by the present invention.

[0022] Wherein: 1. Upper frame; 2. Limiting mechanism; 3. Rotary locking oil cylinder; 4. Lower frame; 5. Opening oil cylinder; 6. Lower roll box deflection adjustment mechanism; 7. Lower roll box; 8. Backlash elimination mechanism; 9. Rotary unit; 10. Upper roll box; 11. Upper roll box pressing mechanism; 12. Upper frame window; 13. Cuboid lock plate position detection switch; 14. Upper frame position detection switch; 31. Locking part; 32. Second piston rod; 33. Cam unit; 34. Oil cylinder housing; 35. Cam curve; 51. Cylinder barrel; 52. First piston rod; 81. Cylindrical housing; 82. Disc spring group; 83. Guide rod; 84. gland. Detailed Description of the Embodiments

[0023] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. On the contrary, they are only examples of devices consistent with some aspects of the present invention detailed in the appended claims.

[0024] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] Embodiment

[0026] See Figure 1 As shown, the present invention provides a prestressed open-type straightening machine frame, including an upper frame 1 and a lower frame 4. One side of the upper frame 1 is hinged to one side of the lower frame 4 through a rotary unit 9. On the other side of the lower frame 4, rotary locking cylinders 3 are symmetrically arranged longitudinally front and back. An opening cylinder 5 is arranged on one side close to the rotary unit 9. The cylinder barrel 51 of the opening cylinder 5 is installed on the outside of the lower frame 4 by means of hinge. The first piston rod 52 of the opening cylinder 5 is hinged to the bottom of the upper frame 1. The cylinder housing 34 of the rotary locking cylinder 3 is installed on the lower frame 4 through an end flange.

[0027] Furthermore, as shown in Figure 2 As shown, the rotary locking cylinder 3 includes a cylinder housing 34. A second piston rod 32 is arranged inside the cylinder housing 34. A locking part 31 is installed at the top end of the second piston rod 32. Cam units 33 are installed around the lower part of the second piston rod 32. A cam curve 35 for restricting the movement track of the cam units 33 is arranged on the inner wall of the cylinder housing 34.

[0028] Furthermore, the cam units 33 are symmetrically distributed around the lower part of the second piston rod 32. The cam unit 33 includes guide columns horizontally arranged around the lower part of the second piston rod 32. Bearings are installed at the ends of the guide columns. When the second piston rod 32 extends / retracts, the bearings move along the cam curve 35.

[0029] Furthermore, the locking part 31 adopts a cuboid lock plate, and the cuboid lock plate is fixedly installed at the top end of the second piston rod 32 through fasteners.

[0030] Furthermore, a cuboid lock plate position detection switch 13 is arranged at the upper frame window 12 of the upper frame 1, and an upper frame position detection switch 14 is arranged on the upper surface of the lower frame 4 at the corresponding position.

[0031] Furthermore, for each stroke of the rotary locking cylinder 3, the rotation angle of the second piston rod 32 is 90 degrees.

[0032] Furthermore, a limiting mechanism 2 is arranged between the upper frame 1 and the lower frame 4, and the limiting mechanism 2 is arranged close to the side of the rotary locking cylinder. The limiting mechanism 2 includes a convex structure below the upper frame 1 and a concave structure above the lower frame 4. The convex structure and the concave structure are adapted to further fix the upper frame 1 and the lower frame 4.

[0033] Furthermore, an upper roll box pressing-down mechanism 11 is provided above the upper frame 1. The bottom end of the upper roll box pressing-down mechanism 11 is fixedly connected to the upper roll box 10. By adjusting the height of the downward pressing of the upper roll box pressing-down mechanism 11, the distance between the upper roll box 10 and the lower roll box 7 can be adjusted accordingly.

[0034] Furthermore, the lower frame 4 is provided with a lower roll box deflection adjusting mechanism 6 to equalize the internal stress of the strip and improve the plate shape.

[0035] In summary, the specific process of opening or closing the prestressed open-type straightening machine frame provided by the present invention is as follows:

[0036] When the upper frame 1 needs to be opened, on the premise that the rotary locking oil cylinder 3 is in the open state, the opening process is as follows: When the second piston rod 32 extends under the oil pressure drive, since the cam unit 33 is installed around the lower part of the second piston rod 32, under the constraint of the cam curve 35, the second piston rod 32 rotates while extending. When the second piston rod 32 completes its stroke, the second piston rod 32 just rotates 90 degrees, and at the same time drives the cuboid lock plate to rotate 90 degrees, so that the cuboid lock plate is in the same direction as the upper frame window 12 of the upper frame 1; at the same time, the position of the cuboid lock plate is detected by the cuboid lock plate position detection switch 13. After the cuboid lock plate position detection switch 13 sends a signal, the upper frame 1 can execute the opening instruction under the action of the opening oil cylinder 5.

[0037] When the upper frame 1 needs to be closed, on the premise that the rotary locking oil cylinder 3 is also in the open state, at this time the cuboid lock plate position detection switch 13 is always in the signal-sending state. After the upper frame 1 is closed in place under the action of the opening oil cylinder 5, the upper frame position detection switch 14 provided on the lower frame 4 detects that the upper frame 1 is closed in place and starts to send a signal. At this time, the rotary locking oil cylinder 3 starts to execute the instruction for the second piston rod 32 to retract, further locking the upper frame 1 and the lower frame 4. When the second piston rod 32 retracts under the oil pressure drive, since the cam unit 33 is installed around the lower part of the second piston rod 32, under the constraint of the cam curve 35, the second piston rod 32 rotates while retracting. When the second piston rod 32 retracts to the end, the second piston rod 32 just rotates 90 degrees, and at the same time drives the cuboid lock plate to rotate 90 degrees, so that the cuboid lock plate forms a 90-degree angle with the direction of the upper frame window 12 of the upper frame 1, and the cuboid lock plate presses on the bottom surface of the upper frame window 12, locking the upper frame 1 and the lower frame 4 together.

[0038] As Figure 3 shown, a clearance elimination mechanism 8 for improving the straightening accuracy is also provided between the upper frame 1 and the lower frame 4, and the clearance elimination mechanism 8 is arranged close to the rotary unit. Specifically, in combination with Figure 3As shown, the backlash elimination mechanism 8 includes a cylindrical housing 81 fixedly arranged at the top of the lower frame 4, and a disc spring group 82 is placed in the chamber of the cylindrical housing 81; a stepped guide rod 83 is arranged at the top of the disc spring group 82 in the chamber of the cylindrical housing 81, and a gland 84 is fixedly connected to the top of the cylindrical housing 81. The large end side of the guide rod 83 is constrained in the chamber of the cylindrical housing 81 through the cooperation of the gland 84 and the cylindrical housing 81, and the top of the guide rod 83 contacts the lower surface of the upper frame 1 through the reaction force generated by the disc spring group 82. Specifically, the top surface of the guide rod 83 is an arc surface. When acting on the arc surface of the guide rod 83, the guide rod 83 moves downward, compressing the disc spring group 82 and deforming it. At the same time, the disc spring group 82 generates an upward reaction force, eliminating the gap between the upper frame 1 and the lower frame 4 and greatly improving the production precision of the entire device.

[0039] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0040] It should be understood that the present invention is not limited to the above-described content and can be modified and changed without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A prestressed open-type straightening machine frame, comprising an upper frame (1) and a lower frame (4), characterized in that, One side of the upper frame (1) is hinged to one side of the lower frame (4) through a slewing unit (9). On the other side of the lower frame (4), rotary locking cylinders (3) are symmetrically arranged longitudinally in the front and rear. An opening cylinder (5) is arranged on the side close to the slewing unit (9). The cylinder barrel (51) of the opening cylinder (5) is installed on the outside of the lower frame (4). The first piston rod (52) of the opening cylinder (5) is hinged to the bottom of the upper frame (1). The cylinder housing (34) of the rotary locking cylinder (3) is installed on the lower frame (4). The rotary locking cylinder (3) includes a cylinder housing (34). A second piston rod (32) is arranged in the cylinder housing (34). A locking part (31) is installed at the top of the second piston rod (32). Cam units (33) are installed around the lower part of the second piston rod (32). A cam curve (35) for restricting the movement track of the cam units (33) is arranged on the inner wall of the cylinder housing (34). The cam units (33) are symmetrically distributed around the lower part of the second piston rod (32). The cam unit (33) includes a guide post horizontally arranged around the lower part of the second piston rod (32). A bearing is installed at the end of the guide post. When the second piston rod (32) extends / retracts, the bearing moves along the cam curve (35).

2. The prestressed open-type straightening machine frame according to claim 1, characterized in that The locking part (31) adopts a cuboid lock plate. The cuboid lock plate is fixedly installed at the top of the second piston rod (32) through fasteners.

3. The prestressed open-type straightening machine frame according to claim 1, characterized in that, A cuboid lock plate position detection switch (13) is arranged at the upper frame window (12) of the upper frame (1). An upper frame position detection switch (14) is arranged on the upper surface of the lower frame (4) at the corresponding position.

4. The prestressed open-type straightening machine frame according to claim 1, characterized in that, For each stroke of the rotary locking cylinder (3), the rotation angle of the second piston rod (32) is 90 degrees.

5. The prestressed open-type straightening machine frame according to claim 1, characterized in that, A limiting mechanism (2) is arranged between the upper frame (1) and the lower frame (4). The limiting mechanism (2) is arranged close to the rotary locking cylinder side.

6. The prestressed open-type straightening machine frame according to claim 1, wherein, A backlash elimination mechanism (8) for improving the straightening accuracy is also arranged between the upper frame (1) and the lower frame (4). The backlash elimination mechanism (8) is arranged close to the slewing unit (9).

7. The prestressed open-type straightening machine frame according to claim 6, characterized in that, The backlash elimination mechanism (8) includes a cylindrical housing (81) fixedly arranged on the top of the lower frame (4). A disc spring group (82) is placed in the chamber of the cylindrical housing (81). A stepped guide rod (83) is arranged in the chamber of the cylindrical housing (81) and on the top of the disc spring group (82). The top of the cylindrical housing (81) is fixedly connected with a gland (84). Through the cooperation of the gland (84) and the cylindrical housing (81), the large end side of the guide rod (83) is restricted in the chamber of the cylindrical housing (81). The top of the guide rod (83) contacts the lower surface of the upper frame (1) through the reaction force generated by the disc spring group (82).

8. The prestressed open-type straightening machine frame according to claim 1, characterized in that, An upper roll box pressing mechanism (11) is arranged on the upper frame (1). The bottom end of the upper roll box pressing mechanism (11) is fixedly connected with the upper roll box (10).

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