An expanding device for nickel-based alloy pipe fittings

Abstract

The present invention belongs to the technical field of pipe fitting processing, and particularly relates to a diameter expansion device for nickel-based alloy pipe fittings, which includes a processing base plate, a pushing and diameter expansion component, and a clamping component; the clamping component includes two clamping side plates installed on both sides of the top of the processing base plate, and a clamping plate is slidably arranged up and down between the two clamping side plates. The number of clamping plates is two, and arc-shaped clamping grooves are arranged in the middle of the opposite sides of the two clamping plates. An adjusting part for controlling the clamping plate to move towards or away from each other is arranged on the clamping plate. The present invention automatically centers and locks nickel-based alloy pipe fittings with different pipe diameters, and locks the pipe fittings in a multi-position fitting manner, increasing the stability of the pipe fitting locking. Moreover, the present invention uses a protection mechanism to limit the locking force of the pipe fittings, further increasing the stability of the pipe fitting locking. In addition, the present invention can position the diameter expansion head based on the position of the clamping component, further increasing the alignment accuracy between the pipe fitting and the diameter expansion head.

Description

Technical Field

[0001] The present invention belongs to the technical field of pipe fitting processing, and particularly relates to a diameter expanding device for nickel-based alloy pipe fittings. Background Art

[0002] Nickel-based alloy pipes are pipe fittings made of alloys composed of nickel and other elements. They have excellent corrosion resistance, high strength, and high-temperature stability, etc. They are used to transport strongly corrosive mixtures and can also be used in high-temperature environments. Therefore, nickel-based alloy pipes are widely used in industries such as chemical engineering, energy, petroleum, metallurgy, medicine, and food.

[0003] When nickel-based alloy pipes are assembled and processed at the installation site, diameter expanding treatment is often required according to installation needs. When diameter expanding treatment is carried out on nickel-based alloy pipe fittings, a diameter expander is often used for operation. However, when the diameter expander is specifically used, problems such as poor diameter expanding effect of nickel-based alloy pipe fittings may occur due to poor clamping stability of the nickel-based alloy pipe fittings.

[0004] In view of the problems of the diameter expander, a document with the publication number of CN112222306B discloses a full-automatic pipe fitting flaring machine. This patent uses a multi-station method to perform batch diameter expanding operations on the pipe fittings conveyed on the conveyor belt. The clamping component of this patent uses mechanical claws to clamp the pipe fittings. The mechanical claws can clamp pipe fittings with different diameters, improving the processing range of the equipment, and the mechanical claws are more stable, firm, and safe to clamp; for another example, a document with the publication number of CN210936795U discloses an automobile muffler pipe fitting port diameter expanding device. This patent clamps and fixes the pipe fittings by a movable upper die and a cooperating lower die, increasing the stability of the pipe fitting locking.

[0005] Although the above-mentioned documents can solve the problem of poor clamping stability of pipe fittings, for pipe fittings with different diameters, they mostly use a line contact method to lock them. This locking method increases the stability of the pipe fittings by increasing the clamping force, and there will be a situation where the pipe fittings are clamped and deformed for thin-walled pipe fittings. The clamping force for different diameters cannot be accurately set. In addition, the position of the pipe fitting and the diameter expanding head cannot be accurately aligned, resulting in deviation in the diameter expansion of the pipe fitting, thus affecting the use effect of the pipe fitting; when lubricating oil is applied to the diameter expanding head, the application position cannot be accurately controlled, and the lubricating oil cannot be synchronously applied during the diameter expanding operation, and the use of a separate drive is costly. Summary of the Invention

[0006] To solve the above problems, the present invention provides the following technical solutions: a diameter-expanding device for nickel-based alloy pipe fittings, including a processing base plate, a pushing and diameter-expanding component installed at one end of the processing base plate, and a clamping component installed at the other end of the processing base plate for clamping the pipe fittings. The pushing and diameter-expanding component consists of a diameter-expanding component and a pusher for controlling the linear movement of the diameter-expanding component. The diameter-expanding component includes a diameter-expanding support plate connected to the output end of the pusher and capable of moving, a diameter-expanding motor installed on the diameter-expanding support plate, a mounting plate provided at the output end of the diameter-expanding motor, and a diameter-expanding head detachably connected to the mounting plate and capable of rotating itself. The clamping component locks the pipe fittings with different pipe diameters coaxially, so that the diameter-expanding head is coaxially arranged with the pipe fittings.

[0007] The clamping component includes two clamping side plates installed on both sides of the top of the processing base plate. A clamping plate slides up and down between the two clamping side plates. The number of clamping plates is two. Clamping grooves with an arc-shaped structure are provided in the middle of the opposite sides of the two clamping plates. An adjusting component is provided on the clamping plate to control its movement towards or away from each other. The axis line of the diameter-expanding head is located in the plane formed by the axes of the two clamping grooves, and the vertical distances between the axis positions of the two clamping grooves and the axis line of the diameter-expanding head are equal respectively.

[0008] An arc-shaped support pad is provided on the middle side wall of the clamping groove. Extrusion plates are symmetrically distributed on both sides of the arc-shaped support pad. One side of the extrusion plate close to the clamping groove is installed in a preset relief groove of the clamping groove through an elastic telescopic rod, and the other side of the extrusion plate away from the elastic telescopic rod is connected with a fitting plate through a hinge.

[0009] A protection mechanism is provided through the middle of each clamping side plate. The protection mechanism is used to limit the final clamping position of the two clamping plates to prevent the pipe fittings from being deformed due to excessive clamping. The protection mechanism includes a protection groove provided on the side of the clamping side plate close to the middle of the processing base plate. Two limit plates slide up and down in the protection groove. The limit plates are installed on the side wall of the protection groove through a reset elastic member. The opposite sides of the two limit plates are wedge-shaped surfaces. A wedge-shaped adjusting block is provided between the two limit plates. The wedge-shaped adjusting block slides through the clamping side plate, and the position of the wedge-shaped adjusting block is adjusted through an extrusion member installed on the clamping side plate.

[0010] Further, a square groove that is slidably matched with the extrusion plate is provided at the position of the clamping groove corresponding to the extrusion plate. The side of the fitting plate away from the extrusion plate is an arc-shaped structure.

[0011] Further, the extrusion member includes a U-shaped frame installed on the side of the clamping side plate close to the outer edge of the processing base plate. The U-shaped frame is stuck outside the wedge-shaped adjusting block. An adjusting screw is threadedly connected to the middle of the U-shaped frame. One end of the adjusting screw is rotatably connected to the wedge-shaped adjusting block.

[0012] Further, a scale guide post is provided on the wedge-shaped adjusting block, and the scale guide post penetrates through the U-shaped frame.

[0013] Further, the mounting plate is a circular plate, and stabilizing support plates are attached to both sides of the mounting plate. An annular slider is provided on the outer ring surface of the mounting plate, and an arc-shaped sliding groove matching the annular slider is provided on the stabilizing support plate. The stabilizing support plate is mounted on the diameter-expanding support plate.

[0014] Further, stabilizing guide grooves are provided on the opposite side surfaces of the two clamping side plates. One end of the stabilizing guide groove close to the diameter-expanding assembly is of a flared structure. A sliding plate is vertically slidably arranged on one side of the diameter-expanding support plate corresponding to the pushing member. The sliding plate is connected to the output end of the pushing member. Stabilizing insertion rods are provided on the front and rear end faces of the diameter-expanding support plate, and the positions of the stabilizing insertion rods correspond to the positions of the stabilizing guide grooves one by one.

[0015] Further, a lifting seat is mounted on the top of the processing base plate. The lifting seat is located at the bottom of the diameter-expanding support plate, and the diameter-expanding support plate and the lifting seat are separable. The distance between the lifting seat and the clamping side plate is less than the length of the stabilizing insertion rod.

[0016] Further, a lubricating oil storage tank is mounted on the top of the clamping side plate. One end of the lubricating oil storage tank close to the diameter-expanding assembly is provided with an L-shaped blanking end. A brush is provided on one side of the blanking end. A switch for controlling the blanking of the lubricating oil is provided at the blanking end of the lubricating oil storage tank. By pressing the switch, the lubricating oil automatically blanks. When the pressing force is removed, the switch automatically resets and the lubricating oil stops blanking. A pressing member is provided on the top of the diameter-expanding support plate. The pressing member moves synchronously with the diameter-expanding support plate and smears the lubricating oil on the outer side of the diameter-expanding head by pressing down the switch.

[0017] Further, the pressing member includes a pressing seat mounted on the top of the diameter-expanding support plate. The pressing seat is of an L-shaped structure. The vertical section of the pressing seat is an elastic telescopic structure. A guide sleeve is mounted on the horizontal section of the pressing seat by means of position adjustment. One side of the guide sleeve close to the lubricating oil storage tank is rotatably connected with an inclined plate. A torsion spring is provided at the rotating end of the inclined plate, and a blocking body is provided on one side of the inclined plate close to the upper end. Connecting rods are mounted at the bottom of the guide sleeve and the bottom end of the pressing seat head respectively. A pressing block corresponding to the height of the switch is mounted between the two connecting rods. The middle part of the pressing block is a telescopic structure. A guiding round rod is provided on the side surface of the blanking end of the lubricating oil storage tank, and the guiding round rod is located above the switch.

[0018] Further, the position of one end of the pressing block close to the clamping member corresponds to the position of the end of the diameter-expanding head, and an inclined groove is provided at the position of this end of the pressing block. The lubricating oil storage tank can be adjusted in position on the top of the clamping side plate.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: First, the present invention automatically centers and locks nickel-based alloy pipe fittings with different pipe diameters, and the nickel-based alloy pipe fittings are locked by a multi-position fitting method, which increases the locking stability of the nickel-based alloy pipe fittings. In addition, the present invention uses a protection mechanism to limit the locking force of the nickel-based alloy pipe fittings, further increasing the locking stability of the nickel-based alloy pipe fittings. Moreover, the present invention can position the expanding head based on the position of the clamping component, further increasing the alignment accuracy between the nickel-based alloy pipe fitting and the expanding head.

[0020] Second, during the diameter expansion of the nickel-based alloy pipe fitting, the present invention automatically applies lubricating oil at the length position where the expanding head corresponds to the diameter expansion of the nickel-based alloy pipe fitting, and the expanding head only applies the lubricating oil before diameter expansion, preventing waste of lubricating oil.

[0021] Third, when the clamping plates move inward synchronously, the fitting plates automatically turn and fit on the side of the nickel-based alloy pipe fitting. As the distance between the two clamping plates gradually decreases, the elastic telescopic rod automatically contracts, causing the upper and lower ends of the nickel-based alloy pipe fitting to fit on the arc-shaped support pads. The arc-shaped support pads can automatically deform and fit on the upper and lower sides of the nickel-based alloy pipe fitting. At this time, the nickel-based alloy pipe fitting is supported by both the arc-shaped support pads and the fitting plates, thereby increasing the locking area of the nickel-based alloy pipe fitting and further enhancing its stability.

[0022] Fourth, the present invention adjusts the front and rear positions of the wedge-shaped adjustment block through the adjusting stud according to the pipe diameter of the nickel-based alloy pipe fitting. The wedge-shaped adjustment block expands or contracts the relative positions of the two limit plates under the cooperation of the wedge-shaped surface, so that the limit plates can limit the clamping plate when it is in the final locking position.

[0023] Fifth, when performing the diameter expansion operation on the nickel-based alloy pipe fitting, the hydraulic cylinder drives the expanding support plate to move to the right. Under the guiding action of the flared structure of the stabilizing guide groove, the stabilizing insertion rod can penetrate into its straight section, enabling the expanding head to be positioned based on the clamping component, and increasing the accuracy of the diameter expansion of the nickel-based alloy pipe fitting. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The following further illustrates the present invention with reference to the drawings and embodiments.

[0025] Figure 1 is a schematic structural diagram of Embodiment 1.

[0026] Figure 2 is a schematic structural diagram between the processing base plate, the clamping component and the protection mechanism in Embodiment 1.

[0027] Figure 3 is a side cross-sectional view between the processing base plate, the clamping component and the protection mechanism in Embodiment 1.

[0028] Figure 4It is a schematic structural diagram among the clamping plate, the arc-shaped support pad, the extrusion plate and the fitting plate in Embodiment 1.

[0029] Figure 5 It is the first schematic structural diagram of Embodiment 2.

[0030] Figure 6 It is the second schematic structural diagram of Embodiment 2.

[0031] Figure 7 It is the schematic structural diagram of Embodiment 3.

[0032] Figure 8 It is the partial schematic structural diagram of Embodiment 3.

[0033] Figure 9 It is the schematic structural diagram of the pressing member in Embodiment 3.

[0034] Figure 10 It is the top view structural diagram between the lubricating oil storage tank and the pressing member in Embodiment 3.

[0035] In the figure: 1, processing base plate; 2, clamping component; 3, diameter-expanding component; 4, pushing member; 5, protection mechanism; 6, lubricating oil storage tank; 7, pressing member; 11, lifting seat; 21, clamping side plate; 211, stable guide groove; 212, top support; 22, clamping plate; 23, clamping groove; 231, square groove; 24, adjusting member; 25, arc-shaped support pad; 26, extrusion plate; 27, elastic telescopic rod; 28, fitting plate; 31, diameter-expanding support plate; 311, sliding plate; 312, stable inserting rod; 32, diameter-expanding motor; 33, mounting plate; 34, diameter-expanding head; 35, stable support plate; 41, supporting vertical plate; 51, protection groove; 52, limiting plate; 53, wedge-shaped adjusting block; 54, U-shaped frame; 55, adjusting screw; 56, graduated guide post; 61, brush; 62, guiding round rod; 71, pressing seat; 72, guiding sleeve; 73, inclined plate; 74, blocking body; 75, connecting rod; 76, pressing block. Specific embodiments

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] Embodiment 1

[0038] Refer to Figure 1, A sizing device for nickel-based alloy pipe fittings, comprising a processing base plate 1, a pushing and sizing component installed at one end of the processing base plate 1, and a clamping component 2 installed at the other end of the processing base plate 1 for clamping the nickel-based alloy pipe fittings. The pushing and sizing component consists of a sizing component 3 and a pusher 4 for controlling the linear movement of the sizing component 3. The sizing component 3 includes a sizing support plate 31 connected to the output end of the pusher 4 and capable of moving, a sizing motor 32 installed on the sizing support plate 31, a mounting plate 33 provided at the output end of the sizing motor 32, and a sizing head 34 detachably connected to the mounting plate 33 and capable of rotating itself. The clamping component 2 locks the nickel-based alloy pipe fittings with different pipe diameters coaxially, so that the sizing head 34 is coaxially arranged with the nickel-based alloy pipe fittings. In this embodiment, the pusher 4 is a hydraulic cylinder, the fixed end of the hydraulic cylinder is installed on the processing base plate 1 through a support vertical plate 41, and the telescopic end of the hydraulic cylinder is connected to the sizing component 3. The present invention can automatically lock nickel-based alloy pipe fittings with different pipe diameters, so that the axis of the nickel-based alloy pipe fittings corresponds to the axis of the sizing head 34, increasing the sizing accuracy of the nickel-based alloy pipe fittings. Moreover, the replaceable sizing head 34 can be used to cooperate with the sizing operation of nickel-based alloy pipe fittings with different pipe diameters. At the same time, the sizing head 34 of the present invention uses a pushing and rotating method to size the nickel-based alloy pipe fittings, and this sizing method makes it easier to size the nickel-based alloy pipe fittings. In addition, a blocking plate for limiting the right end of the nickel-based alloy pipe fitting can be provided at the right end of the processing base plate 1, and the blocking plate can be adjusted in position, so that the nickel-based alloy pipe fitting will not change its position in the left and right directions during the sizing process.

[0039] Refer to Figure 2 , The clamping component 2 includes two clamping side plates 21 installed on both sides of the top of the processing base plate 1. A clamping plate 22 is slidably arranged up and down between the two clamping side plates 21. The number of clamping plates 22 is two. Clamping grooves 23 with an arc-shaped structure are provided in the middle of the opposite sides of the two clamping plates 22. An adjusting member 24 for controlling the clamping plate 22 to move towards or away from each other is provided on the clamping plate 22. The axis line of the sizing head 34 is located in the plane formed by the axes of the two clamping grooves 23, and the vertical distances between the axis positions of the two clamping grooves 23 and the axis line of the sizing head 34 are equal respectively. The clamping component 2 is used to lock the nickel-based alloy pipe fittings with different pipe diameters coaxially. Specifically, by controlling the adjusting member 24, the two clamping plates 22 are moved in the opposite direction, so that the nickel-based alloy pipe fitting can be placed between the clamping plates 22. Then, the adjusting member 24 is operated to drive the two clamping plates 22 to move towards each other, so that the nickel-based alloy pipe fitting can be locked.

[0040] It should be noted that the adjusting member 24 can be set in various forms such as electric or manual. In this embodiment, the adjusting member 24 is a bidirectional lead screw. The threads at both ends of the bidirectional lead screw are respectively in threaded cooperation with the two clamping plates 22. In order to increase the smoothness of the position adjustment of the clamping plate 22, two bidirectional lead screws can be provided. The two bidirectional lead screws are linked by a synchronous belt, and one of the bidirectional lead screws is driven by a lead screw motor. The bottom of the bidirectional lead screw is rotatably connected to the processing base plate 1, and the top of the bidirectional lead screw is connected to the top support 212 provided at the top of the clamping side plate 21.

[0041] Referring to Figures 2 - 4 , since the side arcs of nickel-based alloy pipe fittings with different pipe diameters are all different, when using the same fixture to clamp and lock them, the fixture and the nickel-based alloy pipe fittings are mostly in line contact, resulting in a small clamping area of the nickel-based alloy pipe fittings. In order to increase the stability of the nickel-based alloy pipe fittings, only the clamping force of the fixture can be increased, which causes deformation of the nickel-based alloy pipe fittings. In this embodiment, the clamping component 2 increases the stability of the nickel-based alloy pipe fittings by increasing the contact surface between the nickel-based alloy pipe fittings and the fixture, preventing deformation of the nickel-based alloy pipe fittings with thinner pipe walls. An arc-shaped support pad 25 is provided on the middle side wall of the clamping groove 23. Extrusion plates 26 are symmetrically distributed on both sides of the arc-shaped support pad 25. Square grooves 231 that are slidably matched with the extrusion plates 26 are provided at the positions of the clamping groove 23 corresponding to the extrusion plates 26. The extrusion plates 26 can increase the stability of the extrusion plates 26 by sliding in the square grooves 231. One side of the extrusion plate 26 close to the clamping groove 23 is installed in a preset relief groove of the clamping groove 23 through an elastic telescopic rod 27. A fitting plate 28 is connected to the side of the extrusion plate 26 far from the elastic telescopic rod 27 through a hinge. The side of the fitting plate 28 far from the extrusion plate 26 is an arc-shaped structure. Both the arc-shaped support pad 25 and the fitting plate 28 are made of flexible materials. Specifically, after the nickel-based alloy pipe fitting is placed in the clamping grooves 23 of the two clamping plates 22, the bidirectional lead screw is controlled to rotate, so that the two clamping plates 22 move inward synchronously. At this time, the fitting plate 28 automatically turns and fits on the side of the nickel-based alloy pipe fitting. As the distance between the two clamping plates 22 gradually decreases, the elastic telescopic rod 27 automatically contracts, so that the upper and lower ends of the nickel-based alloy pipe fitting fit on the arc-shaped support pad 25. The arc-shaped support pad 25 can automatically deform and fit on the upper and lower sides of the nickel-based alloy pipe fitting. At this time, the nickel-based alloy pipe fitting is supported by the arc-shaped support pad 25 and the fitting plate 28 at the same time, thereby increasing the locking area of the nickel-based alloy pipe fitting, and further increasing the stability of the nickel-based alloy pipe fitting, preventing the nickel-based alloy pipe fitting from rotating synchronously with the expanding head 34 during the expanding operation.

[0042] Continuing to refer to Figures 2 - 4, when the adjusting member 24 drives the clamping plate 22 to clamp the nickel-based alloy pipe fitting, whether through mechanical operation or electric operation, there will be errors, and there is a hidden danger of deformation for the thin-walled nickel-based alloy pipe fitting. Therefore, the present invention provides a protection mechanism 5 that can limit the locking position of the clamping plate 22, ensuring the stability of the nickel-based alloy pipe fitting and preventing it from being deformed during clamping. A protection mechanism 5 is disposed through the middle of each clamping side plate 21. The protection mechanism 5 is used to limit the final clamping position of the two clamping plates 22 to prevent the clamping plate 22 from over-clamping and causing deformation of the nickel-based alloy pipe fitting. The protection mechanism 5 includes a protection groove 51 provided on the side of the clamping side plate 21 close to the middle of the processing base plate 1. Two limiting plates 52 are slidably arranged up and down in the protection groove 51. The limiting plates 52 are both installed on the side wall of the protection groove 51 through a reset elastic member. The opposite sides of the two limiting plates 52 are wedge-shaped surfaces. A wedge-shaped adjusting block 53 is arranged between the two limiting plates 52. The limiting plates 52 can be closely attached to the wedge-shaped adjusting block 53 under the action of the reset elastic member. The wedge-shaped adjusting block 53 slidably penetrates through the clamping side plate 21, and the position of the wedge-shaped adjusting block 53 is adjusted by an extrusion member installed on the clamping side plate 21. Specifically, according to the pipe diameter of the nickel-based alloy pipe fitting, the front and rear positions of the wedge-shaped adjusting block 53 are adjusted by the extrusion member. The wedge-shaped adjusting block 53 expands or contracts the relative positions of the two limiting plates 52 through the cooperation of the wedge-shaped surfaces, so that when the clamping plate 22 is in the final locked position, the limiting plates 52 limit it.

[0043] Refer to Figure 2 , in this embodiment, the extrusion member uses a stud to adjust the front and rear positions of the wedge-shaped adjusting block 53. The extrusion member includes a U-shaped frame 54 installed on the side of the clamping side plate 21 close to the outer edge of the processing base plate 1. The U-shaped frame 54 is stuck on the outside of the wedge-shaped adjusting block 53. A adjusting stud 55 is threadedly connected to the middle of the U-shaped frame 54. One end of the adjusting stud 55 is rotatably connected to the wedge-shaped adjusting block 53; a scale guide post 56 is arranged on the wedge-shaped adjusting block 53. The scale guide post 56 penetrates through the U-shaped frame 54. The scale guide post 56 can not only guide the wedge-shaped adjusting block 53, but also mark the position of the wedge-shaped adjusting block 53, so that the worker can intuitively see the position where the limiting plate 52 is located.

[0044] Refer to Figure 1 , in this embodiment, the limit of the mounting plate 33 is increased to further increase the stability of the mounting plate 33. The mounting plate 33 is a circular plate. Stable support plates 35 are attached to both sides of the mounting plate 33. An annular slider is arranged on the outer ring surface of the mounting plate 33. An arc-shaped chute matched with the annular slider is arranged on the stable support plate 35. The stable support plate 35 is installed on the diameter-expanding support plate 31. The cooperation between the mounting plate 33 and the stable support plate 35 can increase the stability of the mounting plate 33.

[0045] The steps for expanding the diameter of the nickel-based alloy pipe fittings in this embodiment are as follows: First step, replace the expanding head 34 with a suitable model according to the diameter of the nickel-based alloy pipe fittings, and then rotate the adjusting stud 55 so that the wedge-shaped adjusting block 53 drives the limiting plate 52 to adjust to a suitable position.

[0046] Second step, control the two clamping plates 22 to move in the opposite direction through the bidirectional lead screw so that the nickel-based alloy pipe fittings can be placed between the clamping plates 22. Adjust the position of the blocking plate according to the expanding length of the nickel-based alloy pipe fittings so that the right end of the nickel-based alloy pipe fittings abuts against the side of the blocking plate, and the left end of the nickel-based alloy pipe fittings is not flush with the clamping plates 22.

[0047] Third step, control the bidirectional lead screw to rotate so that the two clamping plates 22 move inward synchronously. At this time, the fitting plate 28 automatically turns and fits against the side of the nickel-based alloy pipe fittings. As the distance between the two clamping plates 22 gradually decreases, the elastic telescopic rod 27 automatically contracts, so that the upper and lower ends of the nickel-based alloy pipe fittings fit against the arc-shaped support pads 25. The arc-shaped support pads 25 can automatically deform and fit against the upper and lower sides of the nickel-based alloy pipe fittings. At this time, the nickel-based alloy pipe fittings are supported by the arc-shaped support pads 25 and the fitting plate 28 at the same time.

[0048] Fourth step, control the expanding motor 32 to rotate, and at the same time control the hydraulic cylinder to extend, so that the expanding head 34 performs a rotational expanding operation on the pipe fittings.

[0049] Fifth step, after the expansion of the nickel-based alloy pipe fittings is completed, control the expanding head 34 to return to the initial position, and remove the nickel-based alloy pipe fittings. Repeating the above operations can perform cyclic expansion operation processing on the nickel-based alloy pipe fittings.

[0050] In this embodiment, the pipe fittings with different nickel-based alloy pipe diameters are automatically locked, so that the axis of the nickel-based alloy pipe fittings corresponds to the axis of the expanding head 34, increasing the accuracy of expanding the nickel-based alloy pipe fittings; and the clamping component 2 increases the stability of the nickel-based alloy pipe fittings by increasing the contact surface between the nickel-based alloy pipe fittings and the fixture, preventing the nickel-based alloy pipe fittings with thinner pipe walls from deforming. At the same time, the protection mechanism 5 can limit the locking position of the clamping plates 22, ensuring the stability of the nickel-based alloy pipe fittings and preventing them from being clamped and deformed.

[0051] Embodiment 2

[0052] On the basis of Embodiment 1, in order to further increase the stability of the expanding operation of the nickel-based alloy pipe fittings, this embodiment positions the expanding assembly 3 with the clamping component 2 as the reference, thereby preventing the mounting plate 33 from shaking when the expanding motor 32 rotates, and ensuring the accuracy of the alignment between the expanding head 34 and the nickel-based alloy pipe fittings, increasing the uniformity of expanding the nickel-based alloy pipe fittings.

[0053] Refer to Figures 5 - 6 On the opposite sides of the two clamping side plates 21, stable guide grooves 211 are provided. One end of the stable guide groove 211 close to the diameter-expanding assembly 3 is of a flared structure. A sliding plate 311 is vertically and slidably arranged on one side of the diameter-expanding support plate 31 corresponding to the pushing member 4. The sliding plate 311 is connected to the output end of the pushing member 4. Stable insertion rods 312 are arranged on the front and rear end faces of the diameter-expanding support plate 31. The positions of the stable insertion rods 312 correspond to the positions of the stable guide grooves 211 one by one. A lifting seat 11 is installed on the top of the processing base plate 1. The lifting seat 11 is located at the bottom of the diameter-expanding support plate 31, and the diameter-expanding support plate 31 and the lifting seat 11 are separable. The distance between the lifting seat 11 and the clamping side plate 21 is less than the length of the stable insertion rod 312. The setting of the lifting seat 11 makes the positions of the stable insertion rods 312 correspond to the positions of the stable guide grooves 211 when the diameter-expanding support plate 31 is in the initial state. And before the nickel-based alloy pipe fitting is subjected to diameter-expanding operation, the stable insertion rods 312 are inserted into the straight sections of the stable guide grooves 211.

[0054] Specifically, when the nickel-based alloy pipe fitting is subjected to diameter-expanding operation, the hydraulic cylinder drives the diameter-expanding support plate 31 to move to the right. Under the guiding action of the flared structure of the stable guide groove 211, the stable insertion rods 312 can be inserted into its straight section. Then the hydraulic cylinder continues to extend, and the diameter-expanding support plate 31 is separated from the lifting seat 11. Then the diameter-expanding head 34 contacts the nickel-based alloy pipe fitting for diameter-expanding treatment.

[0055] Embodiment 3

[0056] Based on Embodiment 1 or Embodiment 2, in this embodiment, the diameter-expanding head 34 is coated with lubricating oil to increase the diameter-expanding effect of the nickel-based alloy pipe fitting. And in this embodiment, the lubricating oil is automatically coated on the length of the nickel-based alloy pipe fitting corresponding to the diameter-expanding of the diameter-expanding head 34, and the diameter-expanding head 34 is only coated before diameter-expanding to prevent waste of lubricating oil. In addition, the diameter-expanding head 34 that expands the nickel-based alloy pipe fitting by rotation can increase the evenness of the lubricating oil coating.

[0057] Refer to Figures 7 - 10, a lubricating oil storage tank 6 is installed on the top support 212 of the clamping side plate 21. One end of the lubricating oil storage tank 6 close to the diameter-expanding assembly 3 is provided with a feeding end of an L-shaped structure. One side of the feeding end is provided with a brush 61, and the height of the brush 61 can be adjusted. When the model of the diameter-expanding head 34 is changed, the height of the brush 61 is adjusted so that the brush 61 fits on the side of the diameter-expanding head 34. A switch for controlling the feeding of the lubricating oil is provided at the feeding end of the lubricating oil storage tank 6. By pressing the switch, the lubricating oil is automatically fed. When the pressing force is removed, the switch automatically resets and stops the feeding of the lubricating oil. A pressing member 7 is provided on the top of the diameter-expanding support plate 31. The pressing member 7 moves synchronously with the diameter-expanding support plate 31 and presses the switch to apply the lubricating oil on the outside of the diameter-expanding head 34. It should be noted that the feeding end of the lubricating oil storage tank 6 is in a closed state in the initial state. When it is necessary to feed the lubricating oil, the lubricating oil can be automatically fed by pressing the switch. When the pressing force on the switch is removed, the switch returns to the initial position under the action of its own restoring force and drives the feeding end of the lubricating oil storage tank 6 to close. The above structure is relatively common in daily life and belongs to the prior art, so the structure is not described in detail here.

[0058] Continue to refer to Figures 7 - 10, the pressing member 7 includes a pressing seat 71 mounted on the top of the expanded diameter support plate 31. The pressing seat 71 is of an L-shaped structure. The vertical section of the pressing seat 71 is an elastic telescopic structure. A guide sleeve 72 is mounted on the transverse section of the pressing seat 71 by means of position adjustment. A sloping plate 73 is rotatably connected to one side of the guide sleeve 72 close to the lubricating oil storage tank 6. A torsion spring is provided at the rotating end of the sloping plate 73, and a blocking body 74 is provided on one side of the sloping plate 73 close to the upper end. Connecting rods 75 are mounted at the bottom of the guide sleeve 72 and the bottom end of the pressing seat 71 respectively. A pressing block 76 corresponding to the height of the switch is mounted between the two connecting rods 75. The middle part of the pressing block 76 is a telescopic structure. A guide round rod 62 is provided on the side of the discharging end of the lubricating oil storage tank 6. The guide round rod 62 is located above the switch. The pressing member 7 can automatically control the lubricating oil storage tank 6 to discharge material according to the expanded length of the nickel-based alloy pipe fitting. Specifically, first, the position of the guide sleeve 72 is adjusted according to the expanded length of the nickel-based alloy pipe fitting, so that the distance from the end of the pressing seat 71 to the guide sleeve 72 corresponds to the expanded length of the nickel-based alloy pipe fitting. When the guide sleeve 72 is adjusted in position, the pressing block 76 can automatically expand and contract to cooperate. When the nickel-based alloy pipe fitting is expanded, the expanded diameter support plate 31 moves to the right under the drive of the hydraulic cylinder. When the pressing block 76 contacts the switch, it can press the switch down, so that the lubricating oil automatically drips onto the expanding head 34. At this time, the brush 61 can brush the lubricating oil evenly. At this time, the sloping plate 73 contacts the guide round rod 62 and pushes the upper end of the sloping plate 73 to rotate downward. When the expansion of the nickel-based alloy pipe fitting is completed, the pressing block 76 moves to the right side of the switch as a whole, and the sloping plate 73 also moves to the right side of the guide round rod 62. When the hydraulic cylinder drives the expanded diameter support plate 31 to perform a return movement, the sloping plate 73 contacts the guide round rod 62. Under the action of the blocking body 74, the sloping plate 73 will move upward along the guide round rod 62. At this time, the vertical section of the pressing seat 71 performs telescopic cooperation, so that the pressing block 76 moves above the switch. When the sloping plate 73 separates from the guide round rod 62, the pressing block 76 abuts against the upper side of the switch and does not press down the switch, and thus the lubricating oil does not discharge material.

[0059] It should be noted that the position of one end of the pressing block 76 close to the clamping member 2 corresponds to the position of the end of the expanding head 34. This setting enables the lubricating oil to be discharged at the end of the expanding head 34 in the present invention. In addition, a sloping groove is provided at the position of this end of the pressing block 76. This setting can prevent the pressing block 76 from abutting against the side of the switch, resulting in the situation where the switch cannot be pressed down. It should also be understood that the guide sleeve 72 and the pressing seat 71 are adjusted and locked in position by means of the cooperation of a plug rod and a jack. The lubricating oil storage tank 6 can be adjusted in position on the top of the clamping side plate 21. This adjustment method can also adopt the same adjustment method as that of the guide sleeve 72 and the pressing seat 71.

[0060] Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. As long as within the scope of the spirit of the present invention, changes and modifications to the above-described embodiments will fall within the scope of the claims of the present invention.

Claims

1. A diameter-expanding device for a nickel-based alloy pipe fitting, comprising a processing base plate, a pushing and diameter-expanding component installed at one end of the processing base plate, and a clamping component installed at the other end of the processing base plate for clamping the pipe fitting. The pushing and diameter-expanding component consists of a diameter-expanding assembly and a pusher for controlling the linear movement of the diameter-expanding assembly. The diameter-expanding assembly includes a diameter-expanding support plate connected to the output end of the pusher, a diameter-expanding motor installed on the diameter-expanding support plate, a mounting plate provided at the output end of the diameter-expanding motor, and a diameter-expanding head detachably connected to the mounting plate. It is characterized in that, The clamping component locks coaxial for pipe fittings with different pipe diameters, so that the expanding head and the pipe fitting are coaxially arranged. The clamping component includes two clamping side plates installed on both sides of the top of the processing base plate. A clamping plate slides up and down between the two clamping side plates. The number of clamping plates is two. Arc-shaped clamping grooves are provided in the middle of the opposite sides of the two clamping plates. An adjusting part for controlling the clamping plate to move towards or away from each other is provided on the clamping plate. The axis line of the expanding head is located in the plane formed by the axes of the two clamping grooves, and the distance between the axis line of the expanding head and the axes of the two clamping grooves is equal. Arc-shaped supporting pads are provided on the middle side walls of the clamping grooves. Extrusion plates are symmetrically distributed on both sides of the arc-shaped supporting pads. One side of the extrusion plate close to the clamping groove is installed in a preset relief groove of the clamping groove through an elastic telescopic rod. The side of the extrusion plate far from the elastic telescopic rod is connected with a fitting plate through a hinge. A protection mechanism is provided through the middle of each clamping side plate. The protection mechanism is used to limit the final clamping position of the two clamping plates. The protection mechanism includes a protection groove provided on the side of the clamping side plate close to the middle of the processing base plate. Two limiting plates slide up and down in the protection groove. The limiting plates are both installed on the side wall of the protection groove through a reset elastic member. The opposite sides of the two limiting plates are wedge-shaped surfaces. A wedge-shaped adjusting block is provided between the two limiting plates. The wedge-shaped adjusting block slides through the clamping side plate. The position of the wedge-shaped adjusting block is adjusted through an extrusion part installed on the clamping side plate. A lubricating oil storage tank is installed on the top of the clamping side plate. One end of the lubricating oil storage tank close to the expanding component is provided with an L-shaped blanking end. A brush is provided on one side of the blanking end. A switch for controlling the blanking of the lubricating oil is provided at the blanking end of the lubricating oil storage tank. By pressing the switch, the lubricating oil is automatically blanked. When the pressing force is removed, the switch automatically resets and the lubricating oil stops blanking. A pressing part is provided on the top of the expanding support plate. The pressing part includes a pressing seat installed on the top of the expanding support plate. The pressing seat is of an L-shaped structure. The vertical section of the pressing seat is an elastic telescopic structure. A guide sleeve is installed on the horizontal section of the pressing seat in a position-adjusting manner. One side of the guide sleeve close to the lubricating oil storage tank is rotatably connected with an inclined plate. A torsion spring is provided at the rotating end of the inclined plate. A blocking body is provided on the side of the inclined plate close to the upper end. Connecting rods are installed at the bottom of the guide sleeve and the bottom of the end of the pressing seat respectively. A pressing block corresponding to the height of the switch is installed between the two connecting rods. The middle of the pressing block is a telescopic structure. A guide round rod is provided on the side of the blanking end of the lubricating oil storage tank. The guide round rod is located above the switch. The position of one end of the pressing block close to the clamping component corresponds to the position of the end of the expanding head.

2. The diameter-expanding device for a nickel-based alloy pipe fitting according to claim 1, wherein, A square groove for sliding cooperation with the extrusion plate is provided at the position of the clamping groove corresponding to the extrusion plate. The side of the fitting plate far from the extrusion plate is of an arc-shaped structure.

3. The diameter-expanding device for a nickel-based alloy pipe fitting according to claim 1, characterized in that, The extrusion part includes a U-shaped frame installed on the side of the clamping side plate close to the outer edge of the processing base plate. The U-shaped frame is stuck outside the wedge-shaped adjusting block. An adjusting screw is threadedly connected in the middle of the U-shaped frame. One end of the adjusting screw is rotatably connected to the wedge-shaped adjusting block.

4. The expanding device for a nickel-based alloy pipe fitting according to claim 3, characterized in that, A scale guide post is provided on the wedge-shaped adjusting block. The scale guide post penetrates through the U-shaped frame.

5. The diameter-expanding device for a nickel-based alloy pipe fitting according to claim 1, wherein The mounting plate is a circular plate. Stable support plates are attached to both sides of the mounting plate. An annular slider is provided on the outer ring surface of the mounting plate, and an arc-shaped chute that mates with the annular slider is provided on the stable support plate. The stable support plate is mounted on the diameter-expanding support plate.

6. The expanding device for a nickel-based alloy pipe fitting according to claim 1, characterized in that Stable guide grooves are provided on the opposite side surfaces of the two clamping side plates. One end of the stable guide groove close to the diameter-expanding assembly is of a flared structure. A sliding plate is vertically slidably provided on one side of the diameter-expanding support plate corresponding to the pushing member. The sliding plate is connected to the output end of the pushing member. A stable insertion rod is provided on the end face of the diameter-expanding support plate, and the position of the stable insertion rod corresponds to the position of the stable guide groove one by one.

7. The expanding device for a nickel-based alloy pipe fitting according to claim 6, characterized in that, A lifting seat is mounted on the top of the processing base plate. The lifting seat is located at the bottom of the diameter-expanding support plate. The distance between the lifting seat and the stable guide groove is less than the length of the stable insertion rod.

8. The diameter-expanding device for a nickel-based alloy pipe fitting according to any one of claims 1-7, characterized in that, The pressing member moves synchronously with the diameter-expanding support plate and presses the switch to apply lubricating oil to the outside of the diameter-expanding head.

9. The diameter-expanding device for a nickel-based alloy pipe fitting according to claim 1, wherein A slanted groove is provided at the end of the pressing block. The lubricating oil storage tank can be adjusted in position on the top of the clamping side plate.

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