Nickel alloy seamless steel pipe expanding machine

Abstract

The invention relates to the technical field of steel pipe machining, in particular to a nickel alloy seamless steel pipe expanding machine which comprises a rack, a vertical pipe is rotationally installed on the rack, a telescopic rod is slidably arranged in the lower end of the vertical pipe, a driving rod is slidably arranged in the upper end of the vertical pipe, and piston rings are arranged between the inner ends of the telescopic rod and the driving rod. The upper end of the driving rod is connected with a vertical reciprocating driving mechanism, an oil storage cavity is formed between the inner ends of the telescopic rod and the driving rod, a first channel is formed in the driving rod, the inner end of the first channel is communicated with the oil storage cavity, and the oil storage cavity contains hydraulic oil; the outer end of the first channel can discontinuously communicate with a hydraulic oil supply device; sectional type expansion work of the steel pipe can be achieved, automatic expansion is achieved, the expansion mode can effectively reduce the risk of steel pipe damage in the expansion process, efficiency is high, and the structure is simple.

Description

Technical Field

[0001] The invention relates to the technical field of steel pipe processing, and in particular to a nickel alloy seamless steel pipe expanding machine. Background Art

[0002] At present, nickel alloy rough pipes are usually formed by hot extrusion. Nickel alloy seamless smooth pipes sometimes need to be expanded when in use. However, the current hot extrusion forming expansion equipment has a complex structure, low efficiency, high production cost and low yield rate, resulting in high production costs for nickel alloy seamless pipes. Summary of the invention

[0003] In order to solve the problems of complicated structure and low efficiency of hot extrusion forming equipment in the prior art, the present invention provides a nickel alloy seamless steel pipe expanding machine.

[0004] The technical solution of the present invention is:

[0005] The present invention provides a nickel alloy seamless steel pipe expanding machine, comprising a frame, a vertical pipe is rotatably installed on the frame, a telescopic rod is slidably arranged inside the lower end of the vertical pipe, a driving rod is slidably arranged inside the upper end of the vertical pipe, a piston ring is arranged between the inner ends of the telescopic rod and the driving rod, the inner ends of the telescopic rod and the driving rod are sealed with the inner wall of the vertical pipe through the piston ring, the upper end of the driving rod is connected to an up and down reciprocating driving mechanism, an oil storage chamber is arranged between the telescopic rod and the inner ends of the driving rod, a first channel is arranged in the driving rod, the inner end of the first channel is connected to the oil storage chamber, the oil storage chamber contains hydraulic oil, and the outer end of the first channel can be intermittently connected to a hydraulic oil supply device;

[0006] Extrusion wheels are symmetrically arranged on both sides of the lower end of the telescopic rod, and the outer sides of the extrusion wheels protrude from the outer side surface of the telescopic rod. A heating mechanism is arranged around the outside of the telescopic end of the telescopic rod. The heating structure is connected to the frame through an up and down extending driving structure. The up and down extending driving structure drives the heating mechanism to move along the extension direction of the driving rod. The frame is connected to the vertical pipe through the rotating driving structure.

[0007] Furthermore, the outer end of the first channel is located on the side of the driving rod, the outer side of the driving rod is rotatably connected to the annular plate, and a second channel is opened inside the annular plate. One end of the second channel is opened in the inner circle of the annular plate and corresponds to the height of the outer end of the first channel. The other end of the second channel is connected to the oil pipe, and the other end of the oil pipe is connected to the hydraulic oil supply device. A guide column is set through the annular plate, and the guide column is fixedly connected to the frame. The inner wall of the annular plate fits tightly with the side of the driving rod.

[0008] Furthermore, the up and down reciprocating drive mechanism includes a first motor on the frame, the output shaft of the first motor is connected to the eccentric wheel, the upper end of the driving rod is rotatably mounted on a rotating seat, and the eccentric wheel and the rotating seat at the upper end of the driving rod are hingedly connected via a hinged rod.

[0009] Furthermore, a linkage rod is fixedly installed at the inner end of the driving rod, a blind hole is arranged at the inner end of the telescopic rod, the lower end of the linkage rod extends into the blind hole, the lower end of the linkage rod is connected to the blind hole through a spline, a vertical rail is arranged on the outer side of the vertical tube, a slider is installed on the vertical rail, and the slider is connected to the upper end of the driving rod through an L rod.

[0010] Furthermore, the up-and-down extension driving structure includes an electric telescopic rod, the upper end of the electric telescopic rod is fixedly connected to the frame, and the lower end of the movable rod of the electric telescopic rod is connected to the heating mechanism.

[0011] Furthermore, the heating mechanism is an electromagnetic heating coil.

[0012] The beneficial effects achieved by the present invention are:

[0013] When the present invention is used, the nickel alloy seamless steel pipe raw material is vertically arranged on the lower side of the telescopic rod, the lower end of the telescopic rod is aligned with the seamless steel pipe, and then the up and down reciprocating driving mechanism works to drive the driving rod to move up and down. Due to the hydraulic transmission effect, the telescopic rod moves up and down synchronously with the driving rod, and the extrusion wheel moves accordingly into the steel pipe to extrude the inner wall of the steel pipe to expand it. At the same time, the rotating driving structure drives the vertical pipe to rotate intermittently. Whenever the telescopic rod completes the telescopic action in sequence, the vertical pipe rotates a certain angle to ensure that the areas passed by the extrusion wheel during the two adjacent telescopic actions of the telescopic rod have partial overlap. After one rotation, the expansion of one end of the steel pipe is completed. At this time, one end of the second channel is connected to the outer end of the first channel. Due to the pressure provided by the hydraulic oil supply device, a certain amount of hydraulic oil is pumped into the oil storage chamber, so that the telescopic rod is extended by a certain distance, and then the above process is repeated to complete the expansion of the next section of the steel pipe again. Continuous repetition can realize the segmented expansion of the steel pipe and realize automatic expansion. This expansion method can effectively reduce the risk of damage to the steel pipe during the expansion process, and has high efficiency and simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 yes Figure 1 A partial enlarged view of part I. DETAILED DESCRIPTION

[0016] To facilitate those skilled in the art to understand the present invention, specific implementations of the present invention are described below with reference to the accompanying drawings.

[0017] like Figures 1-2As shown, the present invention provides a nickel alloy seamless steel pipe expanding machine, comprising a frame 1, a vertical pipe 2 is rotatably installed on the frame 1, a telescopic rod 3 is slidably arranged inside the lower end of the vertical pipe 2, a driving rod 4 is slidably arranged inside the upper end of the vertical pipe, piston rings are arranged between the inner ends of the telescopic rod 3 and the driving rod 4, the inner ends of the telescopic rod 3 and the driving rod 4 are sealed with the inner wall of the vertical pipe 2 through the piston rings, the upper end of the driving rod 4 is connected to the upper and lower reciprocating driving mechanism, an oil storage chamber 5 is provided between the inner ends of the telescopic rod 3 and the driving rod 4, a first channel 6 is provided in the driving rod 4, the inner end of the first channel 6 is connected to the oil storage chamber, the oil storage chamber contains hydraulic oil, the outer end of the first channel is located on the side of the driving rod, the outer side of the driving rod is rotatably connected to the annular plate 7, the inner end of the annular plate is A second channel 8 is provided, one end of which is opened in the inner circle of the annular plate and corresponds to the outer end height of the first channel, the other end of the second channel is connected to an oil pipe 9, the other end of the oil pipe 9 is connected to a hydraulic oil supply device, a guide column 10 is provided through the annular plate, the guide column 10 is fixedly connected to the frame, the inner wall of the annular plate is tightly fitted with the side of the driving rod, extrusion wheels 11 are symmetrically provided on both sides of the lower end of the telescopic rod, the outer side of the extrusion wheel 11 protrudes from the outer side of the telescopic rod, a heating mechanism is arranged around the outside of the telescopic end of the telescopic rod, the heating structure is connected to the frame through an up and down extending driving structure, the up and down extending driving structure drives the heating mechanism to move along the extension direction of the driving rod, and the frame is connected to the vertical pipe through a rotating driving structure.

[0018] The up and down reciprocating driving mechanism includes a first motor 12 on the frame, the output shaft of the first motor 12 is connected to the eccentric wheel 13, the upper end of the driving rod is rotatably installed with a rotating seat 21, the eccentric wheel 13 and the rotating seat 21 at the upper end of the driving rod are hingedly connected through a hinge rod 14, the eccentric wheel is driven to rotate by the motor, and then the driving rod can be driven to reciprocate up and down along the vertical pipe through the hinge rod.

[0019] A linkage rod 15 is fixedly installed at the inner end of the driving rod, a blind hole 16 is arranged at the inner end of the telescopic rod, the lower end of the linkage rod extends into the blind hole, the lower end of the linkage rod is connected to the blind hole through a spline, a vertical rail 17 is arranged on the outer side of the vertical pipe 2, a slider 18 is installed on the vertical rail, and the slider 18 is connected to the upper end of the driving rod through an L rod. Through this design, when the rotary driving structure drives the vertical pipe to rotate, the driving rod and the telescopic rod rotate synchronously with the vertical pipe better.

[0020] The up and down extension driving structure includes an electric telescopic rod 19, the upper end of the electric telescopic rod is fixedly connected to the frame, and the lower end of the movable rod of the electric telescopic rod is connected to the heating mechanism. Of course, the up and down extension driving structure can also be other power structures, such as a screw structure.

[0021] The heating mechanism is an electromagnetic heating coil. This design can locally heat the steel pipe more quickly and control the heating power.

[0022] When in use, the nickel alloy seamless steel pipe 20 raw material is vertically arranged on the lower side of the telescopic rod, the lower end of the telescopic rod is aligned with the seamless steel pipe, and then the up and down reciprocating driving mechanism works to drive the driving rod to move up and down. Due to the hydraulic transmission effect, the telescopic rod moves up and down synchronously with the driving rod, and the extrusion wheel 11 moves accordingly into the steel pipe to extrude the inner wall of the steel pipe to expand it. At the same time, the rotating driving structure drives the vertical pipe to rotate intermittently. Whenever the telescopic rod completes the telescopic action in sequence, the vertical pipe rotates a certain angle to ensure that the area chased by the extrusion wheel 11 during the two adjacent telescopic actions of the telescopic rod has partial overlap. After one rotation, the expansion of one end of the steel pipe is completed. At this time, one end of the second channel 8 is connected to the outer end of the first channel. Due to the pressure provided by the hydraulic oil supply device, a certain amount of hydraulic oil is pumped into the oil storage chamber, so that the telescopic rod is extended a certain distance, and then the above process is repeated to complete the expansion of the next section of the steel pipe again. Continuous repetition can realize the segmented expansion of the steel pipe and realize automatic expansion. This expansion method can effectively reduce the risk of damage to the steel pipe during the expansion process, and has high efficiency and simple structure.

[0023] The above-described embodiments of the present invention do not constitute a limitation on the protection scope of the present invention. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A nickel alloy seamless steel pipe expanding machine, characterized in that: The utility model comprises a frame, a vertical tube is rotatably installed on the frame, a telescopic rod is slidably arranged inside the lower end of the vertical tube, a driving rod is slidably arranged inside the upper end of the vertical tube, piston rings are arranged between the inner ends of the telescopic rod and the driving rod, the inner ends of the telescopic rod and the driving rod are sealed with the inner wall of the vertical tube through the piston ring, the upper end of the driving rod is connected to the upper and lower reciprocating driving mechanism, an oil storage chamber is arranged between the inner ends of the telescopic rod and the driving rod, a first channel is arranged in the driving rod, the inner end of the first channel is connected to the oil storage chamber, the oil storage chamber contains hydraulic oil, and the outer end of the first channel can be intermittently connected to the hydraulic oil supply device; Extrusion wheels are symmetrically arranged on both sides of the lower end of the telescopic rod, and the outer sides of the extrusion wheels protrude from the outer side surface of the telescopic rod. A heating mechanism is arranged around the outside of the telescopic end of the telescopic rod. The heating structure is connected to the frame through an up and down extending driving structure. The up and down extending driving structure drives the heating mechanism to move along the extension direction of the driving rod. The frame is connected to the vertical pipe through the rotating driving structure.

2. The nickel alloy seamless steel pipe expanding machine according to claim 1, characterized in that: The outer end of the first channel is located on the side of the driving rod, and the outer side of the driving rod is rotatably connected to the annular plate. A second channel is opened inside the annular plate. One end of the second channel is opened in the inner circle of the annular plate and corresponds to the height of the outer end of the first channel. The other end of the second channel is connected to the oil pipe, and the other end of the oil pipe is connected to the hydraulic oil supply device. A guide column is set through the annular plate, and the guide column is fixedly connected to the frame. The inner wall of the annular plate fits tightly with the side of the driving rod.

3. The nickel alloy seamless steel pipe expanding machine according to claim 1, characterized in that: The up and down reciprocating driving mechanism comprises a first motor on a frame, the output shaft of the first motor is connected to an eccentric wheel, a rotating seat is rotatably mounted on the upper end of a driving rod, and the eccentric wheel and the rotating seat at the upper end of the driving rod are hingedly connected via a hinged rod.

4. The nickel alloy seamless steel pipe expanding machine according to claim 1, characterized in that: A linkage rod is fixedly installed at the inner end of the driving rod, a blind hole is arranged at the inner end of the telescopic rod, the lower end of the linkage rod extends into the blind hole, the lower end of the linkage rod is connected to the blind hole through a spline, a vertical rail is arranged outside the vertical tube, a slider is installed on the vertical rail, and the slider is connected to the upper end of the driving rod through an L rod.

5. The nickel alloy seamless steel pipe expanding machine according to claim 1, characterized in that: The up-and-down extension driving structure comprises an electric telescopic rod, the upper end of which is fixedly connected to the frame, and the lower end of the movable rod of the electric telescopic rod is connected to the heating mechanism.

6. The nickel alloy seamless steel pipe expanding machine according to claim 1, characterized in that: The heating mechanism is an electromagnetic heating coil.

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