Steel pipe inner surface lubricating structure for steel pipe stretching

Abstract

The utility model provides a steel pipe inner surface lubricating structure for steel pipe stretching, which comprises a fixed mounting table, a horizontally arranged core column is mounted on the fixed mounting table, the rear end of the core column is positioned and mounted on the fixed mounting table, a steel pipe fixing seat is slidably mounted on the fixed mounting table, and the rear end of a steel pipe is positioned and mounted on the steel pipe fixing seat. The steel pipe and the core column are coaxial, the inner diameter of the steel pipe is larger than the outer diameter of the core column, the steel pipe and the front end of the core column stretch into the steel pipe cold drawing machine together, the steel pipe cold drawing machine can extrude the steel pipe, and the inner diameter of the steel pipe is made to be equal to the outer diameter of the core column; the oil pump can inject oil liquid with pressure into the oil channel, so that the oil liquid can be sprayed to the inner surface of the steel pipe from the opening in the front end of the oil channel. The temperature of the surface of the core column can be effectively reduced, and the core column is prevented from being abraded too fast.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of steel pipe cleaning, and specifically relates to a steel pipe inner surface lubricating structure for steel pipe stretching. BACKGROUND

[0002] The steel pipe cold drawing machine is a kind of equipment specially used for cold drawing processing of steel pipes. Unlike hot drawing and extrusion process, cold drawing process is carried out at room temperature or slightly higher temperature, so that higher dimensional accuracy, surface finish and excellent mechanical properties can be obtained. The following is a brief introduction about working principle, component parts and application of the steel pipe cold drawing machine: working principle material preparation: the raw material is usually seamless steel pipe, which is prepared after pretreatment. Clamping and fixing: the steel pipe to be processed is fixed on the traction device of the cold drawing machine to ensure that no slippage occurs during the drawing process. Stretching: a core column is placed in the steel pipe, and pressure is applied outside the steel pipe, so that the steel pipe is thinned and lengthened, realizing stretching. During the stretching process, the diameter of the steel pipe is reduced, the length is increased, and at the same time, the mechanical properties (such as tensile strength and yield strength) are improved. Cooling: the steel pipe needs certain cooling steps during the stretching process to prevent the cold drawing machine and the core column from overheating, for example, water cooling equipment is added to cool the surface of the steel pipe, so as to cool the cold drawing machine and the core column in contact with the steel pipe. Size and quality detection: the stretched steel pipe will be subjected to size measurement and quality inspection to ensure that it meets the design standard. Main component parts workbench: supporting the whole equipment and workpiece. Clamping device: fixing the steel pipe to ensure stability during the drawing process. Stretching device: stretching the steel pipe through traction force, which can be hydraulic, mechanical or electric drive. Die: determining the outer diameter and inner diameter of the final product, usually including one or more pairs of stretching dies. Control system: used to monitor the stretching speed, pressure and other parameters to ensure the controllability and safety of the processing process. The steel pipe cold drawing machine is widely used in the following industries: automobile manufacturing: used for producing automobile parts such as suspension system and frame. Mechanical manufacturing: using high-strength steel pipes as components in various mechanical equipment. Construction industry: used for making steel structure or reinforcing material. Aerospace: providing high-strength and durable materials for specific parts. The advantages of cold drawing technology include high control accuracy, good surface finish and excellent mechanical properties, so it has been widely used in modern industry.

[0003] In actual use, it is found that the core column generates a large amount of heat due to frequent extrusion and friction with the steel pipe, which causes the core column to deform due to thermal expansion and contraction, and further causes the inner diameter of the extruded steel pipe to not meet the requirements, and also reduces the service life of the core column. If the friction between the core column and the inner wall of the steel pipe can be effectively reduced, the heating of the core column can be effectively reduced. Therefore, it is urgent to improve the core column and the steel pipe to reduce the friction between them. UTILITY MODEL CONTENTS

[0004] The utility model discloses based on the technical problem mentioned in background art, propose a kind of steel pipe inner surface lubricating structure for steel pipe drawing.

[0005] The utility model discloses the following technical scheme:

[0006] A steel pipe inner surface lubricating structure for steel pipe drawing, including fixed installation platform, fixed installation platform is installed with the core column of horizontal arrangement, the rear end of core column is positioned and is installed on fixed installation platform, and the fixed installation platform is slidably installed with steel pipe fixing seat, and the rear end of steel pipe is positioned and is installed on steel pipe fixing seat, and steel pipe is also sleeved on core column, and steel pipe is coaxial with core column and the inner diameter of steel pipe is greater than the outer diameter of core column, and steel pipe and core column front end are inserted into steel pipe cold drawing machine together, and steel pipe cold drawing machine can extrude steel pipe, so that the inner diameter of steel pipe is equal to the outer diameter of core column, and oil pump is installed on fixed installation platform, and oil channel is arranged in core column, and the rear end of oil channel is connected with oil pump, and the front end of oil channel is opened in the surface of core column middle part, and oil pump can inject oil liquid with pressure into oil channel, so that oil liquid can be sprayed from the front end opening of oil channel to the inner surface of steel pipe.

[0007] To optimize technical scheme, the further measure that is taken is:

[0008] The fixed installation platform is provided with a plurality of core column fixing seats, the core column passes through the core column fixing seat and is fixedly connected with the core column fixing seat, and the core column fixing seat is spaced apart along the axial direction of the core column on the fixed installation platform.

[0009] The steel pipe fixing seat is provided with a through hole penetrating front and back, and the core column and the steel pipe can pass through the through hole.

[0010] The locking structure includes a locking block and a knob, and the steel pipe fixing seat is provided with a locking block mounting hole and a knob mounting hole.

[0011] The steel pipe fixing seat is provided with a shoulder at the rear of the through hole, the shoulder shields part of the through hole, the diameter of the through hole at this position is reduced, the diameter of the through hole at the shoulder is smaller than the outer diameter of the steel pipe and larger than the diameter of the core column, and the rear end of the steel pipe abuts against the shoulder.

[0012] The steel pipe fixing seat is provided with an oil return channel, the upper end of the oil return channel communicates with the through hole, the lower end is arranged on the lower surface of the steel pipe fixing seat, and the upper end of the oil return channel is located below the shoulder.

[0013] The lower end of the oil return channel is connected with the oil tank through an oil return pipe.

[0014] The bottom of the steel pipe fixing seat is provided with front-to-back sliding grooves, and the fixing installation table is provided with front-to-back sliding rails, the sliding grooves are clamped on the sliding rails to position the steel pipe fixing seat on the fixing installation table, and the sliding grooves can slide forward and backward on the sliding rails.

[0015] The middle part of the core column is provided with a plurality of nozzles, the inner and outer ends of the nozzles are expanded outward, and the middle part is inwardly recessed.

[0016] The number of the nozzles is several, and each nozzle is directed in a different direction.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model discloses a steel pipe fixing seat, the fixing seat can effectively fix the steel pipe through the locking block and knob, and the rear end position of the steel pipe is positioned through the stop shoulder, and the oil return channel is arranged at the rear end of the steel pipe, the oil liquid that the oil channel sprays into the inner chamber of the steel pipe is excessive, the front end of the steel pipe is reduced in diameter because of being extruded, and is attached to the core column, therefore, the oil liquid can only flow out from the rear end of the steel pipe, and the oil liquid that flows out from the rear end of the steel pipe falls into the oil return channel and returns to the oil tank through the oil return pipe, and the consumption of the oil liquid is effectively reduced through the arrangement of the oil return channel.

[0019] The utility model discloses a steel pipe fixing seat, the fixing seat can effectively fix the steel pipe through the locking block and knob, and the rear end position of the steel pipe is positioned through the stop shoulder, and the oil return channel is arranged at the rear end of the steel pipe, the oil liquid that the oil channel sprays into the inner chamber of the steel pipe is excessive, the front end of the steel pipe is reduced in diameter because of being extruded, and is attached to the core column, therefore, the oil liquid can only flow out from the rear end of the steel pipe, and the oil liquid that flows out from the rear end of the steel pipe falls into the oil return channel and returns to the oil tank through the oil return pipe, and the consumption of the oil liquid is effectively reduced through the arrangement of the oil return channel.

[0020] The utility model discloses a steel pipe fixing seat, the fixing seat can effectively fix the steel pipe through the locking block and knob, and the rear end position of the steel pipe is positioned through the stop shoulder, and the oil return channel is arranged at the rear end of the steel pipe, the oil liquid that the oil channel sprays into the inner chamber of the steel pipe is excessive, the front end of the steel pipe is reduced in diameter because of being extruded, and is attached to the core column, therefore, the oil liquid can only flow out from the rear end of the steel pipe, and the oil liquid that flows out from the rear end of the steel pipe falls into the oil return channel and returns to the oil tank through the oil return pipe, and the consumption of the oil liquid is effectively reduced through the arrangement of the oil return channel. ACCURACY OF DRAWINGS

[0021] Figure 1 It is the structural schematic diagram of the utility model;

[0022] Figure 2 It is the structural schematic diagram of the rear part of the core column;

[0023] Figure 3 It is the structural schematic diagram of the steel pipe fixing seat;

[0024] Figure 4 is a structure of the middle part of the core column; Figure 1

[0025] Figure 5 is a structure of the front end of the core column; Figure 1

[0026] The reference signs are: fixed mounting table 1, core column 2, oil channel 21, nozzle 22, steel pipe fixing seat 3, through hole 31, locking block 32, knob 33, locking block mounting hole 34, knob mounting hole 35, shoulder 36, oil return channel 37, sliding groove 38, steel pipe 4, oil pump 5, core column fixing seat 6, oil tank 7. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is described and explained below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application. Based on the examples provided in the present application, all other examples obtained by those of ordinary skill in the art without making creative efforts fall within the scope of the present application.

[0028] Obviously, the drawings described below are only some examples or embodiments of the present application, and for those of ordinary skill in the art, the present application can also be applied to other similar scenarios without making creative efforts on the basis of these drawings. In addition, it can be understood that although the efforts made in this development process can be complex and lengthy, for those of ordinary skill in the art related to the content disclosed in the present application, some design, manufacture or production changes made on the basis of the technical content disclosed in the present application are only routine technical means, and should not be understood as insufficient disclosure of the content disclosed in the present application.

[0029] In the present application, "embodiment" means that the specific features, structures or properties described in combination with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment that is not mutually exclusive with other embodiments. It is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in the present application can be combined with other embodiments without conflict.

[0030] ​​Unless otherwise defined, technical terms and scientific terms used in the present application shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terms "a", "an", "one", "this", and similar referents in the context of describing the application are to be construed to be inclusive, not exclusive. For example, the phrases "comprising a", "comprising one", "comprising the", and "comprising one of" are not limited to the inclusion of only one of the recited elements, but rather include the inclusion of two or more of the recited elements. The use of the term "about" in the context of describing the application is intended to refer to the approximate value of a numerical quantity, and is not intended to mean "precisely" or "exactly". The use of the term "comprising" in the context of describing the application is intended to mean that the composition or method includes the recited elements, but not excluding additional elements. The use of the term "connected" in the context of describing the application is intended to mean that the two elements are in direct or indirect contact with each other. The use of the term "coupled" in the context of describing the application is intended to mean that the two elements are in direct or indirect contact with each other. The use of the term "a plurality" in the context of describing the application is intended to mean two or more. The use of the term "and / or" in the context of describing the application is intended to mean that the associated objects can exist independently of one another, or in any combination. The use of the term "first", "second", "third", etc. in the context of describing the application is intended to mean that the objects are different from one another, but not necessarily in a specific order.

[0031] As Figure 1 shown, the steel pipe inner surface lubricating structure for steel pipe stretching of the utility model, main structure includes fixed installation platform 1, core column 2, steel pipe fixed base 3, steel pipe 4, oil pump 5 and core column fixed base 6 and so on main structure,

[0032] Fixed installation platform 1 is provided with the sliding rail of front and rear trend, to supply steel pipe fixed base 3 to slide on the sliding rail, fixed installation platform 1 is installed oil pump 5, multiple core column fixed base 6, steel pipe fixed base 3 from back to front in order, and steel pipe cold drafter is placed in front of the front end of fixed installation platform 1, the rear part of core column 2 is fixed on core column fixed base 6, and the front end is stretched into steel pipe cold drafter, the rear end of steel pipe 4 is fixed on steel pipe fixed base 3, and the front end is stretched to the front of steel pipe cold drafter, and the front end of steel pipe 4 has a pulling device, and the pulling device pulls steel pipe 4 a certain distance forward every certain time. Steel pipe 4 is sleeved on core column 2.

[0033] As Figure 2 and 4 shown, core column 2 is provided with an oil channel 21 extending from the rear part of core column 2 to the middle part of core column 2, the front end of oil channel 21 is blind, the rear end is connected with oil pump 5, and a plurality of nozzles 22 are arranged on the front end of oil channel 21, and the nozzles 22 are arranged on the front end of oil channel 21. Figure 4It can be seen that the nozzle 22 is expanded at both ends and contracted in the middle. The oil sprayed by the nozzle 22 is dispersed in a mist shape, and the spraying is more uniform and the area is larger. The inlet of the oil pump 5 can be an oil tank 7 or other oil source. The oil pump 5 is used to pump oil into the oil channel 21 at a certain pressure, so that the oil is sprayed from the nozzle 22 and coated on the inner surface of the steel pipe 4. When the coated steel pipe 4 moves to the steel pipe cold-drawing machine, the steel pipe cold-drawing machine will compress the steel pipe 4, and at the same time, it will also have an axial stretching action. When the steel pipe 4 deforms, it will rub against the front end of the core column 2. At this time, the oil can effectively reduce the friction between the inner cavity of the steel pipe 4 and the core column 2, and prevent the core column 2 from generating high temperature.

[0034] As shown in Figure 3 The steel pipe fixing seat 3 includes a through hole 31, a locking block 32, a knob 33, a locking block mounting hole 34, a knob mounting hole 35, a shoulder 36, an oil return channel 37, and a sliding groove 38. The core column 2 and the steel pipe 4 pass through the through hole 31 at the same time. The steel pipe fixing seat 3 is provided with the locking block mounting hole 34 and the knob mounting hole 35. The knob mounting hole 35, the locking block mounting hole 34, and the through hole 31 are sequentially communicated. The knob mounting hole 35 is provided with a thread. The knob 33 is installed in the knob mounting hole 35. The side surface of the knob 33 is also provided with a thread. The two threads are engaged with each other. The knob 33 can move up and down in the knob mounting hole 35 by rotating. The locking block 32 is installed in the locking block mounting hole 34 and can move up and down. The lower end of the knob 33 is inserted into the locking block 32 and is connected with the locking block 32 in a horizontal direction and can rotate, and in a vertical direction and is positioned. The knob 33 can drive the locking block 32 to move downward, so that the locking block 32 invades into the through hole 31, thereby fixing the steel pipe 4 in the through hole 31. The steel pipe fixing seat 3 is provided with the shoulder 36 at the rear of the through hole 31. The diameter of the through hole 31 at the shoulder 36 is smaller than the outer diameter of the steel pipe 4 and larger than the diameter of the core column 2. The rear end of the steel pipe 4 abuts against the shoulder 36. The upper end of the oil return channel 37 is communicated with the through hole 31, and the lower end is opened on the lower surface of the steel pipe fixing seat 3. The upper end of the oil return channel 37 is located below the shoulder 36. The oil flowing out of the rear end of the steel pipe 4 falls into the oil return channel 37. The lower end of the oil return channel 37 is connected with the oil tank 7 through an oil return pipe. The sliding groove 38 is clamped on the sliding rail to position the steel pipe fixing seat 3 on the fixed installation table 1. The sliding groove 38 can slide forward and backward on the sliding rail.

[0035] The oil sprayed by the nozzle 22 to coat the inner surface of the steel pipe 4 is excessive. The oil will flow in the inner cavity of the steel pipe 4, but the inner diameter of the steel pipe 4 is reduced at the steel pipe cold-drawing machine. Figure 5 It can be seen that the steel pipe 4 abuts against the front end of the core column 2. Therefore, the oil cannot flow out of the front end of the steel pipe 4, but can only flow out of the rear end of the steel pipe 4, return to the oil tank 7 through the oil return channel 37, and can be recycled, thereby reducing the cost.

[0036] The above are only preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments, and any technical scheme falling within the concept of the present application belongs to the protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, some improvements and refinements without departing from the principles of the present application are deemed to be within the protection scope of the present application.

Claims

1. A structure for lubricating the inner surface of a steel pipe during drawing of the pipe, comprising a fixed mounting base (1) on which is mounted a core column (2) arranged horizontally, the rear end of the core column (2) being positioned and mounted on the fixed mounting base (1), characterized in that: The steel pipe fixing base (3) is slidably installed on the fixed installation platform (1), the rear end of the steel pipe (4) is positioned and installed on the steel pipe fixing base (3), meanwhile, the steel pipe (4) is sleeved on the core column (2), the steel pipe (4) is coaxial with the core column (2) and the inner diameter of the steel pipe (4) is larger than the outer diameter of the core column (2), the front end of the steel pipe (4) and the core column (2) extends into the steel pipe cold drawing machine, the steel pipe cold drawing machine can extrude the steel pipe (4), so that the inner diameter of the steel pipe (4) is equal to the outer diameter of the core column (2), the oil pump (5) is installed on the fixed installation platform (1), the oil channel (21) is arranged in the core column (2), the rear end of the oil channel (21) is connected with the oil pump (5), the front end of the oil channel (21) is opened on the surface of the middle part of the core column (2), the oil pump (5) can inject the oil liquid with pressure into the oil channel (21), so that the oil liquid can be sprayed from the front end opening of the oil channel (21) to the inner surface of the steel pipe (4).

2. A structure for lubricating the inner surface of a steel pipe during drawing of the steel pipe according to claim 1, characterized in that: A plurality of core column fixing bases (6) are arranged on the fixed installation platform (1), the core column (2) passes through the core column fixing base (6) and is fixedly connected with the core column fixing base (6), the core column fixing base (6) is arranged on the fixed installation platform (1) and is spaced apart along the axial direction of the core column (2).

3. A structure for lubricating the inner surface of a steel pipe during drawing of the steel pipe according to claim 2, characterized in that: The steel pipe fixing base (3) is provided with a through hole (31) penetrating through the front and rear, the core column (2) and the steel pipe (4) can pass through the through hole (31), the steel pipe fixing base (3) is provided with a locking structure, and the locking structure can fix the steel pipe (4) in the through hole (31).

4. A structure for lubricating the inner surface of a steel pipe during drawing of the steel pipe according to claim 3, characterized in that: The locking structure comprises a locking block (32) and a knob (33), the steel pipe fixing base (3) is provided with a locking block mounting hole (34) and a knob mounting hole (35), the knob mounting hole (35), the locking block mounting hole (34) and the through hole (31) are sequentially communicated, the knob mounting hole (35) is provided with a thread, the knob (33) is installed in the knob mounting hole (35), the side surface of the knob (33) is also provided with a thread, the knob (33) can move up and down in the knob mounting hole (35) by rotating, the locking block (32) is movably installed in the locking block mounting hole (34), the lower end of the knob (33) is inserted into the locking block (32) and is connected with the locking block (32) in the horizontal direction and is positioned in the vertical direction, the knob (33) can drive the locking block (32) to move downward, so that the locking block (32) invades into the through hole (31), thereby fixing the steel pipe (4) in the through hole (31).

5. A lubricating structure for the inner surface of a steel pipe for drawing a steel pipe according to claim 4, characterized in that: The steel pipe fixing base (3) is provided with a shoulder (36) at the rear of the through hole (31), the shoulder (36) blocks part of the through hole (31), so that the diameter of the through hole (31) at this position is reduced, the diameter of the through hole (31) at the shoulder (36) is smaller than the outer diameter of the steel pipe (4) and larger than the diameter of the core column (2), and the rear end of the steel pipe (4) abuts against the shoulder (36).

6. A structure for lubricating the inner surface of a steel pipe during drawing of the steel pipe according to claim 5, characterized in that: The steel pipe fixing base (3) is provided with an oil return channel (37), the upper end of the oil return channel (37) communicates with the perforation (31), the lower end is arranged on the lower surface of the steel pipe fixing base (3), and the upper end of the oil return channel (37) is located below the shoulder (36); the oil flowing out from the rear end of the steel pipe (4) falls into the oil return channel (37).

7. A structure for lubricating the inner surface of a steel pipe during drawing of the steel pipe according to claim 6, characterized in that: The lower end of the oil return channel (37) is connected with the oil tank (7) through an oil return pipe.

8. A structure for lubricating the inner surface of a steel pipe during drawing of the steel pipe according to claim 7, characterized in that: The bottom of the steel pipe fixing base (3) is provided with a front-and-rear sliding groove (38), the fixing mounting table (1) is provided with a front-and-rear sliding rail, the sliding groove (38) is clamped on the sliding rail, so that the steel pipe fixing base (3) is positioned on the fixing mounting table (1), and the sliding groove (38) can slide on the sliding rail.

9. The structure for lubricating the inner surface of a steel pipe during drawing of the steel pipe according to claim 1, characterized in that: The middle surface of the core column (2) is provided with a nozzle (22), the inner end of the nozzle (22) communicates with the front end of the oil channel (21), and the outer end is opened on the outer surface of the core column (2); the inner end and the outer end of the nozzle (22) are expanded, and the middle part is retracted.

10. The structure for lubricating the inner surface of a steel pipe during drawing of the steel pipe according to claim 9, wherein: The number of the nozzles (22) is several, and each nozzle (22) is directed to different directions.

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