Guide plate adjusting and locking device and its piercing mill

Abstract

The present invention discloses a guide plate adjusting and locking device and a piercing mill thereof, comprising: an adjusting unit, which is arranged on the frame of the piercing mill and is used for adjusting the distance between guide plates; a locking unit, which is arranged on the main base of the piercing mill and is used for locking the guide plate frame. Through the adjusting unit and the locking unit, the adjustment of the distance between the guide plates of the piercing mill and the locking of the guide plate frame can be realized, solving the problem of base cracking caused by using a lift to adjust the distance between guide plates, having good impact resistance, ensuring the stability of the hole shape of the guide plate during rolling, and reducing the failure rate and maintenance cost.

Description

Technical Field

[0001] The present invention relates to the technical field of seamless steel pipe production equipment, and particularly to a guide plate adjusting device and a piercing mill thereof. Background Art

[0002] A piercing mill is an important device for controlling the deformation of a tube blank in the seamless steel pipe production process. Its function is to roll a solid tube blank into a required hollow shell. Currently, the mainly used piercing mills in China are two-high skew rolling piercing mills, which are divided into vertical and horizontal types according to the layout form of the stands; and are divided into guide disc type and guide plate type according to different auxiliary piercing tools. This application is directed to a vertical two-high guide plate piercing mill: It consists of two guide plates installed on the left and right sides of the stand, a pair of rolls with the same rotation direction and arranged vertically at a certain angle to the rolling line, and a plug located on the rolling center line, forming a closed annular pass. The solid tube blank is rolled into a hollow shell after passing through this closed annular pass. The guide plate belongs to an auxiliary deformation tool. During piercing, the guide plate remains stationary. Its main function is to guide the tube blank and the shell, and at the same time limit the transverse deformation of the metal. When the steel pipe is rolled, a huge rolling force is transmitted from the rolled piece to the guide plate, about 1 / 2 of the rolling force of the roll. Therefore, the stability of the guide plate during rolling directly affects the quality of the shell after piercing and has an important impact on the quality of the steel pipe in the subsequent rolling process. Therefore, the adjustment and locking devices in the guide plate device must withstand the rolling force during operation and ensure the overall stability of the guide plate device.

[0003] The current guide plate adjustment and locking device of the piercing mill uses a worm gear screw jack to push the guide plate frame to adjust the guide plate spacing. Long-term operation will cause the fatigue fracture of the base of the jack and make it unable to work, which will affect the continuous production of the piercing mill, increase the guide plate distance, deviate the pass from the set pass size, and finally cause the change of the outer diameter size of the steel pipe, and further affect the quality of the finished pipe. Summary of the Invention

[0004] To solve some or all of the above-mentioned technical problems existing in the prior art, the present invention provides a guide plate adjusting device and a piercing mill thereof, which can adjust the guide plate spacing, have good impact resistance, and ensure the stability of the pass during rolling.

[0005] The technical solution of the present invention is as follows:

[0006] A guide plate adjusting and locking device, comprising:

[0007] Adjusting unit, the adjusting unit is arranged on the guide plate frame of the piercing mill and is used to adjust the distance between the guide plates. Wherein, the adjusting unit includes a motor, a coupling, a speed reducer and a distance adjusting component. The motor is fixedly connected to the guide plate frame of the piercing mill; one end of the coupling is fixedly connected to the motor shaft of the motor; the input shaft of the speed reducer is fixedly connected to the other end of the coupling; the distance adjusting component is connected to the output shaft of the speed reducer. The distance adjusting component includes a screw down screw and a screw down nut. The screw down nut is fixedly arranged on the guide plate frame of the piercing mill. The screw down screw is matched with the screw down nut. One end of the screw down screw passes through the screw down nut and is connected to the output shaft of the speed reducer;

[0008] Locking unit, the locking unit is arranged on the main frame of the piercing mill and is used to lock the guide plate frame. Wherein, the locking unit includes a hydraulic cylinder, a swinging arm, a pressing block and a pressing head. The hydraulic cylinder is fixedly arranged at the bottom of the piercing mill and is fixedly connected to the main frame of the piercing mill; one end of the swinging arm is fixedly connected to the hydraulic rod of the hydraulic cylinder, and the other end is hinged to the main frame; the pressing block is fixedly arranged on the guide plate frame; the pressing head is matched with the pressing block and is fixedly arranged on the swinging arm.

[0009] Further, inclined surfaces are respectively arranged at the matching parts of the pressing block and the pressing head.

[0010] Further, the inclination angle of the inclined surface is 4° - 6°.

[0011] A piercing mill applying the guide plate adjusting and locking device described above.

[0012] The main advantages of the technical solution of the present invention are as follows:

[0013] The guide plate adjusting device and the piercing mill of the present invention can realize the adjustment of the distance between the guide plates of the piercing mill and the locking of the guide plate frame through the adjusting unit and the locking unit, solve the problem of base cracking caused by using a lift to adjust the distance between the guide plates, have good impact resistance, ensure the stability of the hole shape of the guide plate during rolling, and reduce the failure rate and maintenance cost. Description of the Drawings

[0014] The drawings described herein are used to provide a further understanding of the embodiments of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0015] Figure 1 It is a schematic structural diagram of the adjusting unit of the guide plate adjusting and locking device according to an embodiment of the present invention;

[0016] Figure 2Schematic diagram of the locking unit structure of the guide plate adjustment and locking device according to an embodiment of the present invention;

[0017] Figure 3 Schematic diagram of the overall structure of the guide plate adjustment and locking device from a perspective according to an embodiment of the present invention.

[0018] Figure 4 Schematic diagram of the structure of the pressing block in the guide plate adjustment and locking device according to an embodiment of the present invention.

[0019] Explanation of reference numerals:

[0020] 1. Motor; 2. Coupling; 3. Reducer; 4. Screw for pressing down; 5. Nut for pressing down; 6. Baffle; 7. Guide plate frame; 8. Telescopic frame; 9. Hydraulic cylinder; 10. Rocking swing arm; 11. Pressing head; 12. Pressing block. Detailed implementation manners

[0021] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0022] The following will detail the technical solutions provided by the embodiments of the present invention in conjunction with the drawings.

[0023] As shown in the attached Figures 1-4 figures, the embodiments of the present invention provide a guide plate adjustment and locking device, which includes:

[0024] An adjustment unit, which is arranged on the guide plate frame 7 of the piercing mill and is used to adjust the distance between the guide plates;

[0025] A locking unit, which is arranged on the main frame of the piercing mill, and the locking unit is used to lock the guide plate frame 7.

[0026] Specifically, the adjustment unit includes a motor 1, a coupling 2, a reducer 3 and a distance adjustment component. The motor 1 is fixedly connected to the guide plate frame 7 of the piercing mill; one end of the coupling 2 is fixedly connected to the motor shaft of the motor 1; the input shaft of the reducer 3 is fixedly connected to the other end of the coupling 2; the adjustment component is connected to the output shaft of the reducer 3.

[0027] Specifically, the distance adjustment component includes a screw for pressing down 4 and a nut for pressing down 5. The nut for pressing down 5 is fixedly arranged on the guide plate frame 7 of the piercing mill; the screw for pressing down 4 is matched with the nut for pressing down 5, and one end of the screw for pressing down 4 passes through the nut for pressing down 5 and is connected to the output shaft of the reducer 3.

[0028] With such a setting, the adjustment method of the screw-down screw 4 and the screw-down nut 5 is adopted to replace the direct adjustment method of the worm screw lift. Utilizing the strong impact resistance of the screw-down screw 4 and the screw-down nut 5, the rolling force is transmitted to the guide plate frame 7 through the screw-down screw 4 and the screw-down nut 5, avoiding the impact of the rolling force on the speed reducer. Thus, the problem of the cracking of the lift base caused by using the worm screw lift for adjustment is effectively solved, reducing the equipment maintenance cost and improving the production efficiency of the equipment at the same time.

[0029] Specifically, the locking unit includes a hydraulic cylinder 9, a rocking swing arm 10, a pressing block 12, and a pressing head 11. The hydraulic cylinder 9 is fixedly arranged at the bottom of the piercing mill and fixedly connected to the main frame of the piercing mill; one end of the rocking swing arm 10 is fixedly connected to the hydraulic rod of the hydraulic cylinder 9, and the other end is hinged to the main frame.

[0030] The pressing block 12 is fixedly arranged on the guide plate frame 7; the pressing head 11 cooperates with the pressing block 12, and the pressing head 11 is fixedly arranged on the rocking swing arm 10.

[0031] Specifically, inclined surfaces are respectively arranged at the parts where the pressing block 12 and the pressing head 11 cooperate.

[0032] Specifically, the inclination angle of the inclined surface is 4° - 6°.

[0033] Specifically, as Figure 4 shown, it is a structural schematic diagram of a perspective view of the pressing block 12. Combining Figure 2 shown, the pressing block 12 is of an overall rectangular structure. One end of the pressing block 12 is provided with an inclined surface. One side of the inclined surface is connected to the vertical side, and the other side of the inclined surface is transitionally connected to another inclined surface (hypotenuse). The included angle between the other inclined surface (hypotenuse) and the opposite horizontal side is: 4° - 6°.

[0034] With such a setting, the pressing head 11 and the pressing block 12 are set using the self-locking property of the metal. The working surfaces of the pressing head 11 and the pressing block 12 are set as inclined surfaces with an inclination angle of 4° - 6°. While enhancing the locking effect, it avoids the impact of the rolling force on the hydraulic cylinder, which can not only ensure the stability of the hole shape during rolling of the guide plate but also avoid the failure of the hydraulic cylinder caused by impact.

[0035] A piercing mill applying the above-mentioned guide plate adjustment and locking device can adjust the guide plate spacing during the piercing process of the piercing mill through the adjustment unit and achieve locking during the locking process through the locking unit, ensuring the stability of the guide plate during the rolling process, ensuring the stability of the size of the mandrel during the rolling process, preventing the deformation of the size of the mandrel during the rolling process, improving the quality of the mandrel during the rolling process, and providing a guarantee for the quality of the steel pipe in the subsequent rolling process.

[0036] In some alternative implementation manners of this embodiment, the angles of the inclined surfaces of the indenter 11 and the pressing block 12 are both set to 5°. Through the mutual cooperation between the inclined surfaces of the indenter 11 and the pressing block 12, thereby, the indenter 11 and the pressing block 12 can be locked to each other, achieving the locking effect.

[0037] Preferably, the mating surfaces of the indenter 11 and the pressing block 12 are smooth planes, and the roughness of the smooth plane is Ra3.2, so that the indenter 11 and the pressing block 12 can be tightly pressed and attracted. At the same time, as an alternative manner of this embodiment, a liquid or viscous anti-slip or anti-wear agent can be provided between the indenter 11 and the pressing block 12. On the one hand, while ensuring that the indenter 11 and the pressing block 12 can ensure the locking effect, it can also prevent wear between the indenter 11 and the pressing block 12, ensuring the service life of the indenter 11 and the pressing block 12.

[0038] During use, how to adjust the distance between the baffles 6 and lock the guide plate frame 7 through the guide plate adjusting and locking device of the present invention will be described exemplarily as follows:

[0039] Regarding how to adjust the distance between the guide plates:

[0040] In some alternative implementation manners of this embodiment, the adjusting unit realizes the function of adjusting the distance between the guide plates in the following manner: Specifically, the motor 1 drives the speed reducer 3 through the coupling 2. The lowering lead screw 4 and the lowering nut 5 form a screw pair. Among them, the lowering nut 5 is fixed on the guide plate frame 7 through the baffle 6. The speed reducer 3 drives the lowering lead screw 4 to make a rotational motion. At the same time, after the lowering lead screw 4 and the lowering nut 5 form a screw pair, the lowering lead screw 4 can realize a linear motion, thereby driving the telescopic frame 8 to move back and forth, so as to realize the adjustment of the distance between the guide plates.

[0041] Regarding how to lock the guide plate frame 7:

[0042] In some alternative implementation manners of this embodiment, the hydraulic cylinder 9 drives the swing arm of the perforating machine, and the indenter 11 is installed on the swing arm, and the pressing block 12 is installed on the guide plate frame 7. When the hydraulic cylinder 9 extends, the indenter 11 on the swing arm presses the pressing block 12 on the guide plate frame 7. At the same time, since the angle of the working surface where the pressing block 12 and the indenter 11 cooperate is set to

[0043] 4° to 6° according to the metal self-locking angle, so that the indenter 11 and the pressing block 12 can better realize the locking function during the cooperation process. At the same time, the two hydraulic cylinders 9 installed at the bottom of the perforating machine drive the indenter 11 to press the guide plate frame 7, achieving the locking function.

[0044] It can be seen that for the guide plate adjustment and locking device provided by the embodiment of the present invention, by setting an independent locking unit and an adjustment unit, the adjustment unit is used to adjust the distance between the guide plates, and the locking unit is used to lock the guide plate frame 7, solving the problem of base cracking caused by using a lift to adjust the distance between the guide plates, having good impact resistance, ensuring the stability of the pass during rolling, and reducing the failure rate and maintenance cost.

[0045] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. In addition, in this text, "front", "rear", "left", "right", "upper", and "lower" are all referenced based on the placement state shown in the drawings.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A guide plate adjusting and locking device, characterized in that, Comprising: A regulating unit, which is arranged on the guide plate frame of the piercing mill and is used to adjust the distance between the guide plates. Among them, the regulating unit includes a motor, a coupling, a speed reducer and a distance adjusting component. The motor is fixedly connected to the guide plate frame of the piercing mill; one end of the coupling is fixedly connected to the motor shaft of the motor; the input shaft of the speed reducer is fixedly connected to the other end of the coupling; the distance adjusting component is connected to the output shaft of the speed reducer. The distance adjusting component includes a screw rod for pressing down and a nut for pressing down. The nut for pressing down is fixedly arranged on the guide plate frame of the piercing mill. The screw rod for pressing down is matched with the nut for pressing down. One end of the screw rod for pressing down passes through the nut for pressing down and is connected to the output shaft of the speed reducer; A locking unit, which is arranged on the main frame of the piercing mill and is used to lock the guide plate frame. Among them, the locking unit includes a hydraulic cylinder, a swinging arm, a pressing block and a pressing head. The hydraulic cylinder is fixedly arranged at the bottom of the piercing mill and is fixedly connected to the main frame of the piercing mill; one end of the swinging arm is fixedly connected to the hydraulic rod of the hydraulic cylinder, and the other end is hinged to the main frame; the pressing block is fixedly arranged on the guide plate frame; the pressing head is matched with the pressing block, and the pressing head is fixedly arranged on the swinging arm.

2. The guide plate adjusting and locking device according to claim 1, characterized in that, The parts where the pressing block and the pressing head are matched are respectively provided with inclined surfaces.

3. The guide plate adjusting and locking device according to claim 2, characterized in that, The inclination angle of the inclined surface is 4° - 6°.

4. A punching machine, characterized in that, The guide plate adjusting and locking device according to any one of claims 1 - 3 is used for adjustment and locking.

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