Steel pipe necking machine

Abstract

The utility model relates to a steel pipe necking machine which comprises a bottom plate, a hydraulic cylinder, a fixed plate, a clamping structure and templates, the templates comprise a fixed template and a movable template, necking dies are respectively arranged on the fixed template and the movable template, the clamping structure is located between the fixed template and the movable template, and the movable template and the clamping structure are respectively connected with the bottom plate in a sliding mode. The fixed plate and the fixed template are fixedly connected with the bottom plate, the hydraulic cylinder is fixedly connected with the fixed plate, and the movable template is fixedly connected with the output end of the hydraulic cylinder. According to the steel pipe necking machine, the pipe orifice of the steel pipe is not easy to break, and the forming quality of the steel pipe after necking is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe processing equipment, in particular to a steel pipe necking machine. Background Art

[0002] When the two ends of a steel pipe are connected to other workpieces, it is often necessary to shrink the mouth of the steel pipe, that is, to make the mouth of the steel pipe form a front end with a reduced diameter component. At present, steel pipes are usually processed using a steel pipe shrinking machine. The shrinking machine is a non-cutting processing equipment. The traditional shrinking method is to manually put one end of the steel pipe into the shrinking machine for shrinking. In this way, it is impossible to ensure that the steel pipe enters the shrinking machine in a horizontal state, which can easily cause the mouth of the steel pipe to break, affecting the molding quality of the steel pipe after shrinking. Utility Model Content

[0003] The utility model aims to design a steel pipe necking machine so as to prevent the pipe mouth of the steel pipe from being easily broken and improve the forming quality of the steel pipe after necking.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A steel pipe necking machine comprises a bottom plate, a hydraulic cylinder, a fixed plate, a clamping structure and a template, the template comprises a fixed template and a movable template, the fixed template and the movable template are respectively provided with necking molds, the clamping structure is located between the fixed template and the movable template, the movable template and the clamping structure are respectively slidably connected to the bottom plate, the fixed plate and the fixed template are respectively fixedly connected to the bottom plate, the hydraulic cylinder is fixedly connected to the fixed plate, and the movable template is fixedly connected to the output end of the hydraulic cylinder.

[0006] Furthermore, in the above-mentioned steel pipe shrinking machine, a connecting rod is provided between the fixed plate and the fixed template, two ends of the connecting rod are respectively fixedly connected to the fixed plate and the fixed template, and the movable template is slidably connected to the connecting rod.

[0007] Furthermore, in the above-mentioned steel pipe necking machine, both ends of the movable template are slidably connected with the connecting rods.

[0008] Furthermore, in the above-mentioned steel pipe shrinking machine, a movable groove is provided on the bottom plate, and the movable template and the clamping structure are respectively slidably connected to the bottom plate through the movable groove.

[0009] Furthermore, in the above-mentioned steel pipe shrinking machine, the fixed template and the movable template are respectively provided with limiting members on the outside of the shrinking mold for fixing the shrinking mold on the fixed template or the movable template.

[0010] Furthermore, in the above-mentioned steel pipe shrinking machine, the limiting member is provided with a plurality of angle ends, the angle ends are provided with threaded holes, and the fixed template or the movable template is provided with positioning holes corresponding to the threaded holes.

[0011] Furthermore, in the above-mentioned steel pipe shrinking machine, the clamping structure includes a lower base plate block, an intermediate plate, a movable clamping assembly and a screw, the intermediate plate and the shrinking mold are located at the same height, the intermediate plate is fixedly connected to the lower base plate block, the screw is provided with two sections of threads with opposite screw directions, the part between the two sections of the screw thread is rotatably connected to the intermediate plate, the movable clamping assembly includes a clamping claw for clamping, and the movable clamping assembly is provided with two, and the two movable clamping assemblies are respectively threadedly connected to the two sections of the screw thread.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the steel pipe shrinking machine provided by the utility model uses a clamping structure to clamp the steel pipe, and drives one template to move toward another template through a hydraulic cylinder, so that the steel pipe in the middle is shrunken at both ends, replacing the traditional manual method of putting one end of the steel pipe into the shrinking machine for shrinking, ensuring that the steel pipe is shrunken in a horizontal state, not easily causing the steel pipe mouth to break, and improving the molding quality of the steel pipe after shrinking. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is an exploded view of the mobile template of the utility model;

[0016] Figure 3 It is a schematic diagram of the clamping structure of the utility model;

[0017] The names of the components marked in the figure are as follows:

[0018] 1. Bottom plate; 11. Moving groove; 2. Hydraulic cylinder; 3. Fixed plate; 4. Moving template; 41. Limiting piece; 411. Angle end; 412. Screw; 42. Shrinking mold; 5. Fixed template; 6. Connecting rod; 7. Clamping structure; 71. Lower base plate; 72. Middle plate; 73. Moving clamping assembly; 74. Screw. DETAILED DESCRIPTION

[0019] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0020] Example: Please refer to Figure 1-3 A steel pipe shrinking machine includes a base plate 1, a hydraulic cylinder 2, a fixed plate 3, a clamping structure 7 and a template, wherein the template includes a fixed template 5 and a movable template 4.

[0021] The left and right ends of the bottom plate 1 are respectively fixed with a fixed plate 3 and a fixed template 5, the movable template 4 is located between the fixed plate 3 and the fixed template 5, and the clamping structure 7 is located between the movable template 4 and the fixed template 5. The hydraulic cylinder 2 is fixedly connected to the fixed plate 3, and the output end of the hydraulic cylinder 2 is fixedly connected to the movable template 4. Starting the hydraulic cylinder 2 can drive the movable template 4 to move toward the fixed template 5.

[0022] A movable groove 11 is provided on the base plate 1, and the movable template 4 and the clamping structure 7 are respectively slidably connected to the base plate 1 through the movable groove 11. The movable template 4 and the clamping structure 7 are respectively provided with sliders that cooperate with the movable groove 11, and the movable template 4 and the clamping structure 7 slide on the movable groove 11 through the sliders.

[0023] A connecting rod 6 is provided between the fixed plate 3 and the fixed template 5, and the two ends of the connecting rod 6 are respectively fixedly connected to the fixed plate 3 and the fixed template 5, and the movable template 4 is slidably connected to the connecting rod 6, and both ends of the movable template 4 are penetrated and slidably connected with the connecting rod 6, that is, the connecting rod 6 is distributed at both ends of the movable template 4. The connecting rod 6 is used to guide the movable template 4 during movement.

[0024] The fixed template 5 and the movable template 4 are respectively provided with a shrinking mold 42, and a stopper 41 is provided on the outer side of the shrinking mold 42, which is used to fix the shrinking mold 42 on the fixed template 5 or the movable template 4. Specifically, the fixed template 5 and the movable template 4 are respectively provided with a first groove that matches the shrinking mold 42, and a second groove that matches the stopper 41 is provided on the outer side of the first groove. The shrinking mold 42 is located in the first groove, and the stopper 41 is located in the second groove. The stopper 41 is provided with a plurality of corner ends 411, and the corner ends 411 are provided with threaded holes. The fixed template 5 or the movable template 4 is provided with positioning holes corresponding to the threaded holes. By aligning the threaded holes with the positioning holes and driving screws 412, the stopper 41 can be fixedly connected with the fixed template 5 or the movable template 4, so that the shrinking mold 42 is squeezed and fixed in the second groove. The cooperation between the stopper 41 and the shrinking mold 42 makes it convenient to replace the shrinking mold 42. When shrinking of different calibers is required, only the stopper 41 needs to be removed to replace the shrinking mold 42. The angle end 411 of the stopper 41 is arranged to make it easier to align the threaded hole with the positioning hole.

[0025] The clamping structure 7 includes a lower substrate block 71, an intermediate plate 72, a mobile clamping assembly 73 and a screw 74. The lower substrate block 71 is provided with a slider that cooperates with the movable groove 11. The intermediate plate 72 is located at the same height as the shrinking mold 42 so that the steel pipe located on the clamping structure 7 is coaxial with the shrinking mold 42. The intermediate plate 72 is fixedly connected to the lower substrate block 71, and can also be integrally formed. The screw 74 is provided with two sections of threads with opposite screw directions, and the part between the two sections of the threads of the screw 74 is rotatably connected to the intermediate plate 72. The mobile clamping assembly 73 includes a clamping claw for clamping, and the mobile clamping assembly 73 is provided with two, and the two mobile clamping assemblies 73 are respectively threadedly connected to the two sections of the threads of the screw 74, and the clamping claws of the two mobile clamping assemblies 73 are opposite. The steel pipe to be processed is clamped between the clamping claws of the two mobile clamping assemblies 73. When the screw rod 74 is rotated, the two movable clamping assemblies 73 can be simultaneously moved closer to or farther away from the middle plate 72 to tighten or loosen the steel pipe on the clamping structure 7 .

[0026] Working principle of this embodiment: This embodiment provides a steel pipe shrinking machine. When processing a steel pipe for shrinking, the steel pipe is first placed on the mobile clamping assembly 73 of the clamping structure 7, and the screw 74 is rotated to make the upper and lower mobile clamping assemblies 73 move toward each other. The clamping claws clamp the steel pipe to prevent the steel pipe from deviating during the shrinking process. At the same time, it replaces the traditional manual holding of the steel pipe to ensure that the steel pipe is level and coaxial with the shrinking mold 42 during shrinking to prevent the pipe mouth of the steel pipe from breaking. Then the hydraulic cylinder 2 is started to drive the mobile template 4 to move toward the fixed template 5, and the connecting rod 6 guides the movement of the mobile template 4. The two ends of the steel pipe located in the middle are shrunken in the shrinking molds 42 on the fixed template 5 and the mobile template 4 respectively. The clamping structure 7 is movable, which is convenient for adjusting the position to adapt to clamping steel pipes of different lengths. At the same time, it can move with the steel pipe during the processing process. The upper and lower mobile clamping assemblies 73 are used for clamping, which is convenient for clamping steel pipes of different diameters. The shrinking mold 42 is fixed by a limiter 41, which is convenient for replacement to shrink different calibers. The steel pipe shrinking machine clamps the steel pipe with a clamping structure 7, and drives one template to move toward another template through a hydraulic cylinder 2, so that the steel pipe in the middle is shrunken at both ends, replacing the traditional manual method of putting one end of the steel pipe into the shrinking machine for shrinking, ensuring that the steel pipe is shrunken in a horizontal state, not easily causing the steel pipe mouth to break, and improving the molding quality of the steel pipe after shrinking.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "upper", "lower", "left", "right", "front", "rear" and similar expressions used herein are for illustrative purposes only.

[0028] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A steel pipe necking machine, characterized in that: The invention comprises a base plate (1), a hydraulic cylinder (2), a fixed plate (3), a clamping structure (7) and a template, wherein the template comprises a fixed template (5) and a movable template (4), wherein the fixed template (5) and the movable template (4) are respectively provided with a shrinking mold (42), the clamping structure (7) is located between the fixed template (5) and the movable template (4), the movable template (4) and the clamping structure (7) are respectively slidably connected to the base plate (1), the fixed plate (3) and the fixed template (5) are respectively fixedly connected to the base plate (1), the hydraulic cylinder (2) is fixedly connected to the fixed plate (3), and the movable template (4) is fixedly connected to the output end of the hydraulic cylinder (2).

2. The steel pipe necking machine according to claim 1, characterized in that: A connecting rod (6) is provided between the fixed plate (3) and the fixed template (5), and two ends of the connecting rod (6) are respectively fixedly connected to the fixed plate (3) and the fixed template (5), and the movable template (4) is slidably connected to the connecting rod (6).

3. The steel pipe necking machine according to claim 2, characterized in that: Both ends of the movable template (4) are slidably connected to the connecting rods (6).

4. The steel pipe necking machine according to claim 1, characterized in that: The bottom plate (1) is provided with a movable groove (11), and the movable template (4) and the clamping structure (7) are respectively slidably connected to the bottom plate (1) via the movable groove (11).

5. The steel pipe necking machine according to claim 1, characterized in that: The fixed template (5) and the movable template (4) are respectively provided with a limiting piece (41) on the outside of the shrinking mold (42) for fixing the shrinking mold (42) on the fixed template (5) or the movable template (4).

6. The steel pipe necking machine according to claim 5, characterized in that: The limiting member (41) is provided with a plurality of corner ends (411), the corner ends (411) are provided with threaded holes, and the fixed template (5) or the movable template (4) is provided with positioning holes corresponding to the threaded holes.

7. The steel pipe necking machine according to claim 1, characterized in that: The clamping structure (7) comprises a lower base plate block (71), an intermediate plate (72), a movable clamping assembly (73) and a screw (74); the intermediate plate (72) and the shrinking die (42) are located at the same height; the intermediate plate (72) is fixedly connected to the lower base plate block (71); the screw (74) is provided with two sections of threads with opposite screw directions; the part between the two sections of threads of the screw (74) is rotatably connected to the intermediate plate (72); the movable clamping assembly (73) comprises a clamping claw for clamping; two movable clamping assemblies (73) are provided, and the two movable clamping assemblies (73) are respectively threadedly connected to the two sections of threads of the screw (74).

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