A stainless steel seamless pipe stretching device and stretching method

Abstract

The present invention discloses a stainless steel seamless pipe stretching device, comprising: a base, wherein the base is provided with a first slide groove; a moving mechanism, two support plates, the two support plates are placed on the base, one of the support plates is slidably connected to the first slide groove, and is transmission-connected to the moving mechanism; a plurality of second slide grooves are provided on the support plate, and the plurality of second slide grooves are arranged at intervals around the circumference; a cylindrical positioning column is provided on each of the support plates, and the center of the positioning column is coaxial with the circumference; two clamping parts, the two clamping parts are respectively placed on the two support plates; the clamping part comprises: since the two ends of the stainless steel seamless pipe are clamped and fixed from the inside and the outside by the clamping plates and the positioning columns, even if the stainless steel seamless pipe is deformed during the stretching process, the two ends of the stainless steel seamless pipe are prevented from being separated from the positioning columns and the clamping plates.

Description

Technical Field

[0001] The invention relates to the technical field of stainless steel seamless pipe processing, and in particular to a stainless steel seamless pipe stretching device and a stretching method. Background Art

[0002] Stainless steel seamless steel pipe is a long steel strip with a hollow cross-section and no seams around it. It is resistant to corrosion by weak corrosive media such as air, steam, and water, and chemically corrosive media such as acids, alkalis, and salts. It is also called stainless acid-resistant steel pipe. Among them, stainless steel pipes are divided into two categories according to the production method: seamless pipes and welded pipes. Seamless steel pipes can be divided into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes, and extruded pipes. Cold drawing and cold rolling are secondary processing of steel pipes; welded pipes are divided into straight seam welded pipes and spiral welded pipes. It is widely used in industrial pipelines such as petroleum, chemical, medical, food, light industry, mechanical instruments, and mechanical structural components.

[0003] In Chinese patent application number: CN201611135128.4, a general material mechanical properties testing machine special device is disclosed, which is applied to the field of material mechanical experimental devices, such as steel pipe tensile properties test, especially for steel pipe tensile mechanical properties test, and specifically relates to a steel pipe tensile device; including a pair of tensile chucks, a pair of locating pins and a pair of semicircular pads, the tensile chuck is an integral type, the cylindrical tail of the tensile chuck is connected to the test machine assembly, the sample fixing joint of the tensile chuck is provided with a rectangular groove for installing the tensile sample, two corresponding positioning holes for penetrating and fixing are provided on the side walls of the rectangular groove, and positioning holes are provided at symmetrical positions of the two pads, and the locating pins pass through the locating holes on the tensile chuck and the pad at the same time, so that the two circumferential ends of the tensile sample are respectively connected to the tensile chuck and the pad to form a complete set of tensile devices, and the tensile direction of the tensile sample is perpendicular to the axial direction of the locating pins. In this technical solution, when stretching, the two ends of the stainless steel seamless steel pipe are easily clamped and detached due to deformation. In view of this, this application is proposed. Summary of the invention

[0004] In order to solve at least one technical problem existing in the background technology, the present invention provides a stainless steel seamless pipe stretching device and a stretching method.

[0005] The present invention provides a stainless steel seamless pipe stretching device, comprising:

[0006] A base, wherein a first slide groove is provided on the base;

[0007] Mobile mechanism,

[0008] Two support plates, the two support plates are placed on the base, one of the support plates is slidably connected to the first slide groove and is transmission-connected to the moving mechanism;

[0009] The support plate is provided with a plurality of second slide grooves, which are arranged at intervals around the circumference; each support plate is provided with a cylindrical positioning column, and the center of the positioning column is coaxial with the circumference;

[0010] Two clamping parts, the two clamping parts are respectively placed on the two support plates; the clamping parts include:

[0011] A fixing plate, the fixing plate being arranged on the supporting plate;

[0012] A movable plate, wherein the movable plate is slidably connected to the second sliding groove;

[0013] A clamping plate connected to the moving plate;

[0014] A screw rod is threadedly connected to the fixed plate and rotationally connected to the movable plate.

[0015] Preferably, the clamping plate is arc-shaped.

[0016] Preferably, the device further comprises:

[0017] A first plate, the first plate is located between the two support plates and is slidably connected to the first sliding groove;

[0018] A telescopic mechanism, wherein the telescopic mechanism drives the first plate to move along the first sliding groove;

[0019] An auxiliary part, the auxiliary part comprising:

[0020] a second plate, the second plate being arranged on the first plate;

[0021] a first shaft connected to the second plate;

[0022] a first support member, the first support member being located on the first axis;

[0023] Two leveling units are arranged at intervals and are used to be placed on both sides of the stainless steel seamless pipe. The leveling units include:

[0024] A connecting rod and an extruded member, wherein the extruded member is connected to the first supporting member through the connecting rod.

[0025] The extrusion piece is tapered, and the diameter of the end away from the connecting rod is smaller.

[0026] Preferably, a third sliding groove is provided on the first supporting member;

[0027] The leveling unit also includes:

[0028] a second supporting member, the second supporting member being placed on the first supporting member;

[0029] a sliding rod, the sliding rod being slidably connected to the second supporting member;

[0030] A slider, the slider is connected to the slide bar and is slidably connected to the third slide groove;

[0031] A first spring, wherein the first spring is sleeved on the slide rod, one end of the first spring is connected to the slide block, and the other end is connected to the second support member; wherein,

[0032] The connecting rod is connected to the sliding block.

[0033] Preferably, the first shaft is rotatably connected to the second plate;

[0034] The auxiliary part further includes a fixing mechanism, and the fixing mechanism is used to fix the first shaft;

[0035] The first support member and the flattening unit are both in plurality, spaced apart along the circumference of the first axis, and the distance between two extrusion members gradually decreases along the circumference of the first axis.

[0036] Preferably, a fixing sleeve is provided on the second plate, and a first limiting groove is provided in the fixing sleeve; the first limiting groove is parallel to the first axis;

[0037] The auxiliary department also includes:

[0038] A movable ring, the movable ring is located in the fixed sleeve, the movable ring is provided with a first limit block, and the first limit block can be moved in the first limit groove; the movable ring is sleeved on the first shaft, the inner wall of the movable ring is provided with a second limit groove, and the second limit groove is parallel to the first limit groove;

[0039] A second limiting block, wherein the second limiting block is located on the first axis and is movably located in the second limiting groove.

[0040] Preferably, the auxiliary part further includes a second spring, which is sleeved on the fixed sleeve, has one end connected to the movable ring, and the other end connected to the second plate, and the second spring is in a stretched state.

[0041] Preferably, there are a plurality of auxiliary parts, and the plurality of auxiliary parts are arranged at intervals along the first sliding groove, and the first axes of any two of the auxiliary parts are arranged non-parallel.

[0042] A stainless steel seamless pipe stretching method adopts the device.

[0043] The beneficial effects brought by the present invention are:

[0044] Place the stainless steel seamless pipe between the two support plates and put it on the positioning column. By turning the screw, the moving plate is driven to move, and the clamping plate is pressed on the stainless steel seamless pipe. The stainless steel seamless pipe is fixed by the clamping plate and the positioning column from the inside and outside.

[0045] A moving mechanism is used to drive a support plate away to stretch the stainless steel seamless pipe.

[0046] Since both ends of the stainless steel seamless pipe are clamped and fixed from the inside and outside by the clamping plate and the positioning column, even if the stainless steel seamless pipe is deformed during the stretching process, the two ends of the stainless steel seamless pipe are prevented from being separated from the positioning column and the clamping plate. It has good stability and can avoid falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 A schematic diagram of the structure of one aspect disclosed in the present invention;

[0048] Figure 2 It is a cross-sectional view of the positioning column and the like disclosed in the present invention;

[0049] Figure 3 It is a front view of the extrusion part disclosed in the present invention;

[0050] Figure 4 is a cross-sectional view of an extrusion disclosed in the present invention;

[0051] Figure 5 It is a cross-sectional view of the fixing sleeve etc. disclosed in the present invention. DETAILED DESCRIPTION

[0052] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other; the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left" and "right" etc. indicate directions or positional relationships based on directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the positions or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limitations of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or a transmission connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements.

[0054] Reference Figure 1-5 The present invention provides a stainless steel seamless pipe stretching device, which includes: a base 1, a moving mechanism 2, two support plates 3, and two clamping parts.

[0055] The base 1 is provided with a first slide groove 101 ; the two support plates 3 are placed on the base 1 , wherein one of the support plates 3 is slidably connected to the first slide groove 101 and is transmission-connected to the moving mechanism 2 .

[0056] The support plate 3 is provided with a plurality of second slide grooves 301 , which are arranged at intervals around the circumference; each support plate 3 is provided with a cylindrical positioning column 4 , and the center of the positioning column 4 is coaxial with the circumference.

[0057] The two clamping parts are respectively placed on the two supporting plates 3 ; the clamping parts include: a fixed plate 5 , a movable plate 6 , a clamping plate 7 , and a screw rod 8 .

[0058] The fixed plate 5 is arranged on the supporting plate 3; the movable plate 6 is slidably connected to the second sliding groove 301; the clamping plate 7 is connected to the movable plate 6; the screw 8 is threadedly connected to the fixed plate 5 and rotationally connected to the movable plate 6.

[0059] The stainless steel seamless pipe A is placed between the two support plates 3 and sleeved on the positioning column 4. By rotating the screw 8, the movable plate 6 is driven to move, and the clamping plate 7 is pressed on the stainless steel seamless pipe, and the stainless steel seamless pipe is fixed by the clamping plate 7 and the positioning column 4 from the inside and outside.

[0060] The moving mechanism 2 is used to drive a support plate 3 away to perform stretching on the stainless steel seamless pipe.

[0061] Since both ends of the stainless steel seamless pipe A are clamped and fixed from the inside and outside by the clamping plate 7 and the positioning column 4, even if the stainless steel seamless pipe is deformed during the stretching process, the two ends of the stainless steel seamless pipe are prevented from being separated from the positioning column 4 and the clamping plate 7. Good stability.

[0062] As a further improvement of the above embodiment, in one implementation, the clamping plate 7 is arc-shaped to increase the contact area and prevent the clamping plate 7 from falling off.

[0063] The device further comprises: a first plate 9, a telescopic mechanism 10, and an auxiliary part.

[0064] The first plate 9 is located between the two support plates 3 and is slidably connected to the first slide groove 101; the telescopic mechanism 10 drives the first plate 9 to move along the first slide groove 101;

[0065] The auxiliary part includes: a second plate 11, a first shaft 12, a first support member 13, two leveling units,

[0066] The second plate 11 is arranged on the first plate 9 ; the first shaft 12 is connected to the second plate 11 ; and the first support member 13 is located on the first shaft 12 .

[0067] Two leveling units are arranged at intervals and are used to be placed on both sides of the stainless steel seamless pipe. The leveling units include: a connecting rod 14 and an extrusion member 15 . The extrusion member 15 is connected to the first support member 13 through the connecting rod 14 .

[0068] During the stretching process, the telescopic mechanism 10 is used to drive the first plate 9 to move back and forth, and the extrusion pieces 15 on both sides are in close contact with the stainless steel seamless pipe. The extrusion pieces 15 are used to extrude the stainless steel seamless pipe to flatten it and ensure its circularity, so that the stainless steel seamless pipe can remain round after stretching to avoid deformation.

[0069] As a further improvement of the above embodiment, in one implementation, the extrusion piece 15 is tapered, and the diameter of the end away from the connecting rod 14 is smaller. The surface of the extrusion piece 15 is used to extrude the stainless steel seamless pipe.

[0070] As a further improvement of the above embodiment, in one implementation, a third sliding groove is provided on the first support member 13;

[0071] The leveling unit further includes: a second support member 16, a slide bar 17, a slide block 18, a first spring 19,

[0072] The second support member 16 is placed on the first support member 13; the sliding rod 17 is slidably connected to the second support member 16; the sliding block 18 is connected to the sliding rod 17 and is slidably connected to the third sliding groove; the first spring 19 is sleeved on the sliding rod 17, one end of which is connected to the sliding block 18, and the other end is connected to the second support member 16; wherein the connecting rod 14 is connected to the sliding block 18.

[0073] The first spring 19 is used to apply pressure to the slider 18 and the connecting rod 14 to the extrusion piece 15, so that the extrusion piece 15 is closely attached to the stainless steel seamless pipe.

[0074] The stainless steel seamless tube will deform during stretching. During the back and forth movement of the first plate 9, the sizes of the stainless steel seamless tube at different positions are different. By setting the first spring 19, buffering can be performed, so that the extrusion piece 15 can move appropriately along the third slide groove to a certain extent, so as to better extrude the stainless steel seamless tube, ensure the circularity, and ensure that it remains round after stretching.

[0075] As a further improvement of the above embodiment, in one implementation, the first shaft 12 is rotatably connected to the second plate 11;

[0076] The auxiliary part also includes a fixing mechanism, which is used to fix the first shaft 12; the first support member 13 and the flattening unit are both multiple, along the circumferential spacing portion of the first shaft 12, and the distance between two extrusion members 15 gradually decreases along the circumference of the first shaft 12.

[0077] During the stretching process, the diameter of the stainless steel seamless pipe gradually decreases. By opening the fixing mechanism and rotating the first shaft 12, the extrusion piece 15 in the other flattening unit is closely attached to the stainless steel seamless pipe, so as to better extrude the stainless steel seamless pipe. It is ensured that during the stretching process of the stainless steel seamless pipe, the extrusion piece 15 with appropriate spacing can be used to apply appropriate force to the stainless steel seamless pipe, so as to better extrude the stainless steel seamless pipe.

[0078] As a further improvement of the above embodiment, in one implementation, a fixing sleeve 20 is provided on the second plate 11, and a first limiting groove 201 is provided in the fixing sleeve 20; the first limiting groove 201 is parallel to the first axis 12;

[0079] The auxiliary part also includes: a moving ring 21, a second limiting block 23,

[0080] The movable ring 21 is located in the fixed sleeve 20, and a first limit block 22 is provided on the movable ring 21, and the first limit block 22 can be movably located in the first limit groove 201; the movable ring 21 is sleeved on the first shaft 12, and a second limit groove 211 is provided on the inner wall of the movable ring 21, and the second limit groove 211 is parallel to the first limit groove 201; the second limit block 23 is located on the first shaft 12, and can be movably located in the second limit groove 211.

[0081] As a further improvement of the above embodiment, in one implementation, the auxiliary part also includes a second spring 24, which is sleeved on the fixed sleeve 20, one end of which is connected to the movable ring 21, and the other end is connected to the second plate 11, and the second spring 24 is in a stretched state.

[0082] A plurality of second limiting blocks 23 and second limiting grooves 211 may be arranged at intervals.

[0083] When adjustment is needed, the movable ring 21 is pulled outward to disengage the second limiting block 23 from the second limiting groove 211 , and the first shaft 12 is rotated to adjust the position of the first shaft 12 so that different extrusion members 15 extrude the stainless steel seamless pipe.

[0084] Then, the movable ring 21 is moved inward again to allow the second limit block 23 to enter the second limit groove 211. Since the first limit block 22 is located in the first limit groove 201, the first shaft 12 is prevented from rotating, and the extrusion member 15 can apply pressure to the stainless steel seamless pipe.

[0085] As a further improvement of the above embodiment, in one implementation, there are multiple auxiliary parts, and the multiple auxiliary parts are arranged at intervals along the first slide groove 101, and the first axes 12 in any two of the auxiliary parts are arranged non-parallel.

[0086] In this embodiment, by setting a plurality of auxiliary parts, the extrusion pieces 15 in different auxiliary parts exert actual extrusion force on different positions of the stainless steel seamless pipe, which can better flatten the stainless steel seamless pipe at different positions, so that the stainless steel seamless pipe can be round after being stretched. The stretching effect is good.

[0087] A stainless steel seamless pipe stretching method adopts the device and has good stretching effect.

[0088] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A stainless steel seamless pipe stretching device, characterized in that: include: A base, wherein a first slide groove is provided on the base; Mobile mechanism, Two support plates, the two support plates are placed on the base, one of the support plates is slidably connected to the first slide groove and is transmission-connected to the moving mechanism; The support plate is provided with a plurality of second slide grooves, which are arranged at intervals around the circumference; each support plate is provided with a cylindrical positioning column, and the center of the positioning column is coaxial with the circumference; Two clamping parts, the two clamping parts are respectively placed on the two support plates; the clamping parts include: A fixing plate, the fixing plate being arranged on the supporting plate; A movable plate, wherein the movable plate is slidably connected to the second sliding groove; A clamping plate connected to the moving plate; A screw rod, the screw rod being threadedly connected to the fixed plate and rotatably connected to the movable plate; The device also includes: A first plate, the first plate is located between the two support plates and is slidably connected to the first sliding groove; A telescopic mechanism, wherein the telescopic mechanism drives the first plate to move along the first sliding groove; An auxiliary part, the auxiliary part comprising: a second plate, the second plate being arranged on the first plate; a first shaft connected to the second plate; a first support member, the first support member being located on the first axis; Two leveling units are arranged at intervals and are used to be placed on both sides of the stainless steel seamless pipe. The leveling units include: A connecting rod and an extruded member, wherein the extruded member is connected to the first supporting member through the connecting rod; The first shaft is rotatably connected to the second plate; The auxiliary part further includes a fixing mechanism, and the fixing mechanism is used to fix the first shaft; The first support member and the flattening unit are both in plurality, spaced apart along the circumference of the first axis, and the distance between two extrusion members gradually decreases along the circumference of the first axis.

2. The stainless steel seamless pipe stretching device according to claim 1, characterized in that: The clamping plate is arc-shaped.

3. The stainless steel seamless pipe stretching device according to claim 1, characterized in that: The extrusion piece is tapered, and the diameter of the end away from the connecting rod is smaller.

4. The stainless steel seamless pipe stretching device according to claim 1, characterized in that: The first support member is provided with a third sliding groove; The leveling unit also includes: a second supporting member, the second supporting member being placed on the first supporting member; a sliding rod, the sliding rod being slidably connected to the second supporting member; A slider, the slider is connected to the slide bar and is slidably connected to the third slide groove; A first spring, wherein the first spring is sleeved on the slide rod, one end of the first spring is connected to the slide block, and the other end is connected to the second support member; wherein, The connecting rod is connected to the sliding block.

5. The stainless steel seamless pipe stretching device according to claim 1, characterized in that: A fixing sleeve is disposed on the second plate, and a first limiting groove is disposed in the fixing sleeve; the first limiting groove is parallel to the first axis; The auxiliary department also includes: A movable ring, the movable ring is located in the fixed sleeve, the movable ring is provided with a first limit block, and the first limit block can be moved in the first limit groove; the movable ring is sleeved on the first shaft, the inner wall of the movable ring is provided with a second limit groove, and the second limit groove is parallel to the first limit groove; A second limiting block, wherein the second limiting block is located on the first axis and is movably located in the second limiting groove.

6. The stainless steel seamless pipe stretching device according to claim 1, characterized in that: The auxiliary part also includes a second spring, which is sleeved on the fixed sleeve, one end of which is connected to the movable ring, and the other end of which is connected to the second plate, and the second spring is in a stretched state.

7. The stainless steel seamless pipe stretching device according to claim 1, characterized in that: There are multiple auxiliary parts, and the multiple auxiliary parts are arranged at intervals along the first sliding groove, and the first axes of any two of the auxiliary parts are arranged non-parallel.

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