WO2022048408A1

WO2022048408A1 - On-line oil injection lubrication system of small-caliber cold pipe blank unit

Info

Publication number: WO2022048408A1
Application number: PCT/CN2021/111784
Authority: WO
Inventors: 高虹; 朱国良; 刘涛; 翟丽丽; 沈卫强; 蒋小培
Original assignee: 江苏武进不锈股份有限公司
Priority date: 2020-09-04
Filing date: 2021-08-10
Publication date: 2022-03-10
Also published as: US20230211397A1; CN212597966U

Abstract

An on-line oil injection lubrication system of a small-caliber cold pipe blank unit, comprising a pipe blank inner hole injection assembly (1), a tube blank outer surface spray assembly (2), and at least one smart oil supply assembly (3). The tube blank inner bore spray assembly (1) partially extends into the tube blank (4) and lubricates the inner hole of same. The front portion of the tube blank is also provided with a roller (5) for rolling the tube blank, the tube blank outer surface spray assembly (2) lubricates the contact portion of the tube blank (4) and the roller (5). The smart oil supply assembly (3) comprises an upper IPC (31), a vector inverter (32), and a hydraulic pump (33), the hydraulic pump (33) is connected to an oil barrel (34), the upper IPC (31) by means of controlling the vector inverter (32) regulates oil amount the hydraulic pump (33) provides to the inner hole of the lubricant assembly (1) and/or the tube blank outer surface spray assembly. The on-line oil injection lubrication system can improve the internal and external surface quality of the small-caliber stainless steel tube, effectively solving the problems of small-caliber stainless steel seamless tubes experiencing various surface quality problems, including roughening, folds, and micro-cracks caused by a lack of lubricant during the large deformation rolling process.

Description

On-line oil injection lubrication system of small diameter cold tube blank unit

technical field

The utility model relates to the field of metal forming equipment, in particular to an on-line oil injection lubrication system for a small-diameter cold tube blank unit.

Background technique

In the production process of seamless steel pipes, it is necessary to lubricate the inner and outer surfaces of small-diameter seamless steel pipes online to reduce rolling friction and prevent cracks and roughening of the inner and outer surfaces of the tube blank due to excessive friction. Since the rolling process needs to achieve rotation and feeding at the same time, and the speed is relatively fast, it is necessary to ensure that the lubrication in the rolling of seamless steel pipes meets the requirements. Once the lubrication is missing, the pipe rolling phenomenon is easy to occur.

With the continuous development of modern industrial technology, the requirements for the control accuracy of liquid flow in the industrial production process are also constantly improving. The simple flow control system has some shortcomings due to its large error, low control accuracy and lack of real-time control. It does not meet the modern demand for high-precision and high-speed control of liquid flow. Based on the continuous maturity and improvement of PLC control technology in the technical field, its application scope is also expanding, playing a vital role in the field of industrial control, and reflecting the current advanced level of industrial automation to networked and intelligent development .

Invention patent content

The main technical problem solved by the utility model is to provide an on-line oil injection lubrication system for a small-diameter cold tube blank unit, which can significantly improve the quality of the inner and outer surfaces of the small-diameter stainless steel pipe, thereby improving the yield and effectively solve the problem of the small-diameter stainless steel seamless pipe. Due to the loss of oil on the inner and outer surfaces, various surface quality problems such as surface rolling, rolling and micro-cracks are caused during the rolling process with large deformation.

In order to solve the above-mentioned technical problems, a technical solution adopted by the present invention is to provide an online oil injection lubrication system for a small-diameter cold tube blank unit, which includes an oil injection component for the inner hole of the tube blank, an oil injection component for the outer surface of the tube blank, and at least one The intelligent oil supply component, the oil injection component for the inner hole of the tube blank partially extends into the tube blank to spray oil on the inner hole of the tube blank, and the front part of the tube blank is also provided with a roller for rolling the tube blank. The surface oil injection component is located on the outside of the tube blank, and sprays oil on the contact part between the tube blank and the roll. The tube blank inner hole oil injection component includes a mandrel rod and a mandrel rod, and the mandrel rod is arranged in the inner hole of the tube blank. The mandrel rod is connected with the mandrel rod, and the inside of the mandrel rod has an oil passage, the end of the mandrel rod is provided with an oil outlet, and the oil passage communicates with the oil outlet, and the The oil injection assembly on the outer surface of the tube blank includes a bracket on which an oil injection ring is movably mounted, the oil injection ring has an axially arranged oil injection channel, and the front end of the oil injection channel is connected with a plurality of nozzles, The intelligent oil supply assembly includes an upper industrial computer, a vector frequency converter, and a hydraulic pump, the hydraulic pump is connected to the oil tank, and the upper industrial computer controls the vector inverter to adjust the hydraulic pump to inject oil into the inner hole of the tube blank assembly and/or The oil supply of the oil injection assembly on the outer surface of the tube blank.

In a preferred embodiment of the present invention, the oil outlet portion includes a plurality of oil outlet ports, the oil outlet ports are arranged obliquely with respect to the axial direction, and the outlet of the oil outlet port is located on the outer circumference of the mandrel.

In a preferred embodiment of the present invention, the oil outlets are evenly spaced along the center of the mandrel, and the number of oil outlets is three.

In a preferred embodiment of the patent of the present invention, an oil filling cup is installed on the left end of the mandrel rod. The oil filling cup communicates with the oil passage and injects lubricating oil through a hydraulic pump. The outer side of the oil filling cup is sleeved with a sealing shell. body, the sealing shell is installed in the support table.

In a preferred embodiment of the present invention, the diameter of the mandrel from left to right gradually increases first and then becomes smaller, and the right end of the mandrel is also connected with a plug extension rod.

In a preferred embodiment of the present invention, the nozzles are arc-shaped flat nozzles, and the number of nozzles is three, and the nozzles are arranged close to each other and completely cover the outer side of the tube blank.

In a preferred embodiment of the present invention, the number of the intelligent oil supply components is one, and the oil injection components to the inner hole of the tube blank and/or the outer surface of the tube blank are sprayed at the same time. The number of the intelligent oil supply components It is 1 and injects oil into the inner hole of the tube blank and the outer surface of the tube blank respectively.

In a preferred embodiment of the present utility model, the hydraulic pump transmits the oil to the oil injection component of the inner hole of the tube blank and the oil injection component of the outer surface of the tube blank through the oil pipeline.

In a preferred embodiment of the present invention, the oil tank is provided with a pressure sensor for detecting the pressure inside the oil tank and a proximity switch for detecting the liquid level.

The beneficial effects of the utility model are: the on-line oil injection lubrication system of the small-diameter cold tube blank unit of the utility model can significantly improve the inner and outer surface quality of the small-diameter stainless steel pipe, thereby improving the finished product rate, and effectively solve the problem of the internal and external surface of the small-diameter stainless steel seamless pipe. The loss of oil on the surface causes various surface quality problems such as surface rolling, rolling and micro-cracks during the rolling process with large deformation.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, under the premise of no creative work, other drawings can also be obtained from these drawings, wherein:

Fig. 1 is the structure of a preferred embodiment of the on-line oil injection lubrication system of the small-diameter cold tube blank unit of the present utility model

schematic diagram;

Fig. 2 is the partial structure schematic diagram of Fig. 1;

Fig. 3 is the partial structure schematic diagram of Fig. 1;

Fig. 4 is the front view of Fig. 3;

The symbols of the components in the drawings are as follows: 1. Oil injection assembly in the inner hole of the tube blank, 11, Mandrel rod, 12, Mandrel, 13, Oil passage, 14, Oil outlet, 15, Oil outlet, 16 , Oil filling cup, 17, Sealed shell, 18, Support table, 19, Plug extension rod, 2, Oil injection assembly on the outer surface of tube blank, 21, Bracket, 22, Oil injection ring, 23, Oil injection channel, 24, Nozzle , 3, intelligent oil supply components, 31, upper industrial computer, 32, vector inverter, 33, hydraulic pump, 34, fuel tank, 35, oil pipeline, 4, tube blank, 5, roll.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to Figures 1 to 4, an online oil injection lubrication system for a small-diameter cold tube blank unit, including a tube blank inner hole oil injection component 1, a tube blank outer surface oil injection component 2 and at least one intelligent oil supply component 3. The inner hole oil injection component 1 of the billet partially extends into the tube billet 4 to spray oil on its inner hole. The front part of the tube billet 4 is also provided with a roller 5 for rolling the tube billet. 4 outside, and spray oil on the contact part of the tube blank 4 and the roll 5, the tube blank inner hole oil injection assembly 1 includes a mandrel rod 11 and a mandrel rod 12, the mandrel rod 12 is arranged in the inner hole of the tube blank 4, the core The rod 11 is connected with the mandrel 12, and there is an oil passage 13 inside the mandrel rod 11. The end of the mandrel 12 is provided with an oil outlet 14, and the oil passage 13 communicates with the oil outlet 14. The surface fuel injection assembly 2 includes a bracket 21 on which a fuel injection ring 22 is movably mounted. The fuel injection ring 22 has an axially arranged fuel injection channel 23, and the front end of the fuel injection channel 23 is connected with a plurality of spray heads 24. The oil supply assembly 3 includes an upper industrial computer 31, a vector frequency converter 32, and a hydraulic pump 33. The hydraulic pump is connected to the oil tank 34. The upper industrial computer 31 controls the vector frequency inverter 32 to adjust the hydraulic pump 33 to inject the oil into the inner hole of the tube

blank assembly

1 and 34. /or the oil supply amount of the oil injection assembly 2 on the outer surface of the tube blank.

In addition, the oil outlet portion 14 includes a plurality of oil outlet ports 15 , the oil outlet ports 15 are provided inclined to the axial direction, and the outlet of the oil outlet port 15 is located on the outer periphery of the mandrel 12 . The oil outlet ports 15 are evenly spaced along the center of the mandrel 12 , and the number of oil outlet ports 15 is three.

In addition, an oil filling cup 16 is installed on the left end of the mandrel rod 11. The oil filling cup 16 communicates with the oil passage 13 and is injected with lubricating oil through the hydraulic pump 33. The outer side of the oil filling cup 16 is sleeved with a sealing shell 17. Installed in the support table 18 . The diameter of the mandrel 12 gradually increases from left to right and then gradually becomes smaller, and the right end of the mandrel 12 is also connected with a plug extension rod 19 .

In addition, the nozzles 24 are arc-shaped flat nozzles. The nozzles 24 are arranged close to each other, and the outer side of the tube blank 4 is completely covered. The lubricating oil is evenly sprayed to the outer surface of the tube blank in all directions to form a continuous annular oil film.

In addition, the number of intelligent oil supply components 3 is 1 and the oil injection component 1 and/or the outer surface of the tube blank are injected into the inner hole of the tube blank at the same time, and the number of intelligent oil supply components 3 is 1 Hole fuel injection assembly 1 and tube blank outer surface fuel injection assembly 2. The hydraulic pump 33 transmits the oil to the oil injection assembly 1 in the inner hole of the tube blank and the oil injection assembly 2 on the outer surface of the tube blank through the oil pipeline 35 . The oil tank 35 is provided with a pressure sensor for detecting the pressure inside the oil tank and a proximity switch for detecting the liquid level. The vector inverter 32 is used to drive the motor and the hydraulic pump 66. The flow control in the oil circuit is completed by the vector inverter directly controlling the speed of the motor and the oil pump. The system pressure is controlled by a relief valve, which can improve the efficiency and reduce the cost. The configuration and programming software package of the PLC programmable logic controller is completed in an offline state, and then downloaded to the controller as a complete file through the serial port of the computer to realize functions such as pressure loss, flow control detection, and fault detection and alarm. . Through the pressure actuator, the system pressure can be guaranteed, and the system flow can be automatically controlled and adjusted with the change of various specifications of the group distance. It is equipped with a proximity switch that can be fed to the corresponding position according to the tube billet, and the entire rolling oil lubrication system can be automatically opened and closed according to the actual working conditions. Lubrication sub-system, the main engine automatically locks and alarms when the lubrication system fails, so as to realize the integrity of the whole system control. The upper IPC and configuration software will comprehensively and dynamically display the dynamic process flow of the rolling process, and realize pressure loss, dynamic monitoring of multi-stage flow system, fault detection, alarm, fault diagnosis, system maintenance, etc.

The specific working principle of the online oil injection lubrication system for the small-diameter cold tube blank unit of the utility model is as follows: before the rolling starts, the on-site personnel operate the configuration software of the upper industrial computer according to the parameters of the different specifications and distances of the tubes, and adjust the vector frequency converter. power, thereby controlling the oil delivery of the hydraulic pump. At this time, the fuel injection amount and fuel injection speed required for rolling small-diameter seamless steel pipes with corresponding parameters are calculated by the calculator inside the upper industrial computer, and then the calculation results are transmitted to the PLC programmable logic controller by the calculator. The vector frequency converter is controlled by the PLC programmable logic controller to adjust the hydraulic pump, so as to adjust the oil delivery speed.

Insert the mandrel 12 into the inner hole of the tube blank 4, the oil outlet 15 is located at the end of the tube blank 4, and then the oil tank 34 enters the oil filling cup 16 through the oil pipeline 35 under the action of the hydraulic pump 33, and then passes through the oil outlet Part 15 of the lubricating oil flows out between the mandrel 12 and the tube blank 4 .

The oil injection ring 22 is arranged on the bracket 21, and the bracket 21 is fixed on the feed side of the rolling mill. When the small diameter stainless steel seamless pipe is rolled, the lubricating oil passes through the oil injection ring 22 under the action of the hydraulic pressure 33, and is sprayed on the arc-shaped flat nozzle 24. At the same place, it is sprayed to the outer surface of the tube blank 4 in a uniform and omnidirectional coverage.

The upper industrial computer is completed by the PLC programmable logic controller configuration and programming software package in offline state, and then downloaded to the controller as a complete file through the serial port of the computer to realize pressure loss, flow control detection and fault detection alarm and other functions. Through the pressure actuator, the system pressure can be guaranteed, and the system flow can be automatically controlled and adjusted with the change of various specifications of the group distance. It is equipped with a proximity switch that can be fed to the corresponding position according to the tube billet, and the entire rolling oil lubrication system can be automatically opened and closed according to the actual working conditions. Lubrication sub-system, the main engine automatically locks and alarms when the lubrication system fails, so as to realize the integrity of the whole system control. The upper IPC and configuration software will fully and dynamically display the dynamic process flow of the rolling process, and realize the dynamic monitoring and control of the flow system. It has complete fault detection, alarm, diagnosis and safety protection functions. The system can also realize remote monitoring, fault diagnosis, system maintenance, operation guidance, system upgrade, etc. through remote communication media.

Different from the prior art, the online oil injection lubrication system of the small-diameter cold tube blank unit of the utility model can perform online oil-injection lubrication on the inner and outer surfaces of the small-diameter seamless steel pipe, and significantly improve the quality of the inner and outer surfaces of the small-diameter stainless steel pipe, thereby improving the finished product. It can effectively solve various surface quality problems such as surface rolling, rolling and micro-cracks caused by oil loss on the inner and outer surfaces of small-diameter stainless steel seamless pipes during the rolling process of large deformation.

The above descriptions are only the embodiments of the present invention, and are not intended to limit the scope of the patent of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description of the present invention, or directly or indirectly applied to other related technologies Fields are similarly included in the scope of patent protection of the present invention.

Claims

An online oil injection lubrication system for a small-diameter cold tube blank unit is characterized in that it includes an oil injection component in the inner hole of the tube blank, an oil injection component on the outer surface of the tube blank, and at least one intelligent oil supply component. The component part extends into the tube blank to spray oil on its inner hole, the front part of the tube blank is also provided with a roller for rolling the tube blank, the oil injection component on the outer surface of the tube blank is located outside the tube blank, and the and the contact part of the roll is sprayed with oil, the oil injection component in the inner hole of the tube blank includes a mandrel rod and a mandrel rod, the mandrel rod is arranged in the inner hole of the tube blank, the mandrel rod is connected with the mandrel rod, and The inside of the mandrel rod has an oil passage, the end of the mandrel is provided with an oil outlet, and the oil passage communicates with the oil outlet. The oil injection assembly on the outer surface of the tube blank includes a bracket, and the bracket An oil injection ring is movably installed on the upper part. The oil injection ring has an oil injection channel arranged in the axial direction. The front end of the oil injection channel is connected with a plurality of nozzles. The intelligent oil supply assembly includes a host industrial computer, a vector frequency conversion The hydraulic pump is connected to the oil tank, and the upper industrial computer controls the vector frequency converter to adjust the oil supply of the hydraulic pump to the oil injection component of the inner hole of the tube blank and/or the oil injection component of the outer surface of the tube blank.
The online oil injection lubrication system for a small-diameter cold tube blank unit according to claim 1, wherein the oil outlet portion includes a plurality of oil outlets, the oil outlets are arranged obliquely with respect to the axial direction, and the oil outlet The outlet of the oil port is located on the outer circumference of the mandrel.
The online oil injection lubrication system for a small-diameter cold tube blank unit according to claim 2, wherein the oil outlets are evenly spaced along the center of the mandrel, and the number of oil outlets is three.
The on-line oil injection lubrication system for a small-diameter cold tube blank unit according to claim 3, wherein an oil filling cup is installed on the left end of the mandrel rod, and the oil filling cup communicates with the oil passage and injects lubricating oil through a hydraulic pump. , the outer side of the oil filling cup is sleeved with a sealing shell, and the sealing shell is installed in the support table.
The on-line oil injection lubrication system for a small-diameter cold tube blank unit according to claim 4, wherein the pipe diameter of the mandrel gradually increases from left to right and then gradually becomes smaller, and the right end of the mandrel is also A head extension rod is attached.
The online oil injection lubrication system for a small-diameter cold tube blank unit according to claim 1, wherein the nozzles are arc-shaped flat nozzles, and the number of the nozzles is 3, and the nozzles are arranged close to each other, and the nozzles are The outer side of the tube blank is completely covered.
The online oil injection lubrication system for a small-diameter cold tube blank unit according to any one of claims 1 to 6, wherein the number of the intelligent oil supply components is one, and the oil injection components and/or the inner hole of the tube blank are simultaneously injected. An oil injection component on the outer surface of the tube blank, the number of the intelligent oil supply components is one, and the oil injection component is respectively directed to the inner hole of the tube blank and the oil injection component to the outer surface of the tube blank.
The on-line oil injection lubrication system for a small-diameter cold tube blank unit according to claim 7, wherein the hydraulic pump transmits the oil to the inner hole oil injection assembly of the tube blank and the outer surface oil injection assembly of the tube blank through the oil pipeline .
The on-line oil injection lubrication system for a small-diameter cold tube blank unit according to claim 8, wherein the oil tank is provided with a pressure sensor for detecting the internal pressure of the oil tank and a proximity switch for detecting the liquid level.