Cold spinning device for steel seamless gas cylinder

Abstract

The invention discloses a cold spinning device for a steel seamless gas cylinder, relates to the field of seamless gas cylinder production, and aims to solve the problem that only a tube blank with a single inner diameter can be fixed due to the fact that a clamping block matched with the inner diameter of the tube blank is adopted for clamping and fixing when the tube blank of the gas cylinder is fixed by a traditional spinning machine in the prior art. A clamping pipe is rotatably connected to the interior of the fixing pipe, a plurality of electric control hydraulic rods are fixedly connected to the outer side of the clamping pipe and located on the outer side of the bottle blank clamping and rotating device in an annular array mode, the telescopic ends of the electric control hydraulic rods extend into the clamping pipe and are fixedly connected with pressing pieces, and a fixing circular plate is fixedly connected to the middle of the interior of the clamping pipe. A mold core is connected to the middle of the end face of the side, facing the outer portion of the bottle blank clamping and rotating device, of the fixed circular plate, and through the design of the replaceable mold core and the cooperation with a multi-pressing-piece clamping mechanism driven by an electric control hydraulic rod, the machining requirements of gas cylinder pipe blanks with different inner diameter specifications can be met.

Description

Technical Field

[0001] The present invention relates to the field of seamless gas cylinder production, and specifically to a cold spinning device for steel seamless gas cylinders. Background Art

[0002] A seamless gas cylinder is a high-pressure container manufactured by an integral forming process, without any welded structure, and is usually made of high-quality alloy steel or composite materials through processes such as hot stamping, spinning, or stretching. It is characterized by high strength and good safety, and is widely used in industrial gas storage (such as oxygen, nitrogen), medical breathing gas, fire fighting equipment, and the aerospace field.

[0003] For example, the authorized announcement number CN 110640008 B discloses a cold spinning device for steel seamless gas cylinders, specifically related to the field of gas cylinder cold spinning processing devices, including a frame. One side of the bottom of the frame is fixedly provided with a blank clamping and rotating mechanism for the gas cylinder. Above the blank clamping and rotating mechanism is provided a spinning wheel mechanism, and the top of the spinning wheel mechanism is driven by a lead screw. Both ends of the lead screw are fixedly connected to the frame through bearings. In the present invention, the fastening bearing sleeve assembly plays a supporting role for the special-shaped rotating shaft. When the special-shaped rotating shaft rotates, it contacts multiple ball bearings distributed on the spindle-shaped surface, which not only reduces lateral wear, but also enables the special-shaped rotating shaft to rotate more stably without eccentric jitter. When wear occurs between the special-shaped rotating shaft and the ball bearings, through the setting of multiple reserved fastening holes, at this time, the entire fastening bearing sleeve group can be squeezed by rotating the fastening ring, so that the ball bearings fit the special-shaped rotating shaft, thereby realizing the stable rotation of the special-shaped rotating shaft.

[0004] However, in the prior art, traditional spinning presses use blocks that match the inner diameter of the gas cylinder blank for clamping and fixing, which results in the ability to only fix blanks of a single inner diameter size, making the spinning press unable to process blanks of multiple inner diameters. Therefore, there is an urgent need in the market to develop a cold spinning device for steel seamless gas cylinders to help people solve existing problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a cold spinning device for steel seamless gas cylinders to solve the problem in the above-mentioned background art that in the prior art, traditional spinning presses use blocks that match the inner diameter of the gas cylinder blank for clamping and fixing, which results in the ability to only fix blanks of a single inner diameter size, making the spinning press unable to process blanks of multiple inner diameters.

[0006] To achieve the above object, the present invention provides the following technical solution: A cold spinning device for steel seamless gas cylinders, including a blank clamping and rotating device. In the middle upper part of one end face inside the blank clamping and rotating device, a fixed pipe is fixedly connected. One end of the fixed pipe communicates with the outer end face of the blank clamping and rotating device. Inside the fixed pipe, a clamping pipe is rotatably connected. One side of the clamping pipe extends out of one end face of the blank clamping and rotating device. On the outer side of the clamping pipe and annularly arranged outside the blank clamping and rotating device, a plurality of electro-hydraulic rods are fixedly connected. The telescopic ends of the plurality of electro-hydraulic rods extend into the clamping pipe and are all fixedly connected with pressing plates. In the middle of the clamping pipe, a fixed circular plate is fixedly connected. In the middle of one end face of the fixed circular plate facing the outside of the blank clamping and rotating device, a die core is connected.

[0007] Preferably, both sides inside the fixed pipe and the outer end face of the clamping pipe are connected through bearings.

[0008] Preferably, in the middle of one end face of the fixed circular plate facing the inside of the blank clamping and rotating device, a connecting shaft is connected. In the middle upper part of the other end face inside the blank clamping and rotating device, a driving motor is fixedly connected.

[0009] Preferably, one end of the connecting shaft extends out of one side of the clamping pipe and is connected with the output shaft of the driving motor through a coupling.

[0010] Preferably, on the connecting shaft and fixedly connected inside the clamping pipe is a support ring. Between the outer side of the support ring and the inner wall of the clamping pipe, they are fixedly connected through a plurality of fixing rods.

[0011] Preferably, on the side of the die core adjacent to the fixed circular plate, a flange is fixedly connected. Between the flange and the fixed circular plate, they are fixedly connected through a plurality of bolts.

[0012] Preferably, at the lower end of one end face of the blank clamping and rotating device, a spinning table is fixedly connected. On the upper end of the spinning table, a spinning device is arranged.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] (1) In this invention, through the design of a replaceable die core and in cooperation with a multi-pressing plate clamping mechanism driven by electro-hydraulic rods, it can meet the processing requirements of gas cylinder blanks with different inner diameter specifications, significantly improving the versatility and application range of the equipment.

[0015] (2) In this invention, a plurality of electro-hydraulic rods and pressing plate structures with synchronous control are adopted to ensure uniform clamping force on the end of the blank, avoiding the eccentric or deformation problems that may be caused by the traditional single chuck fixation, and improving the processing accuracy and product consistency.

[0016] (3) In this invention, the mold core can be quickly disassembled and assembled through the flange and bolts. Cooperating with the stable rotating structure composed of the support ring and the fixed rod, it not only ensures the clamping rigidity but also facilitates the replacement of molds of different specifications, greatly improving the use efficiency of the equipment and the convenience of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the front view of a cold spinning device for steel seamless gas cylinders according to the present invention;

[0018] Figure 2 is the main sectional view of the present invention;

[0019] Figure 3 is the side sectional view of the clamping tube of the present invention;

[0020] Figure 4 is the enlarged detail view A of the present invention.

[0021] In the figure: 1. Blank clamping and rotating device; 101. Fixed tube; 102. Driving motor; 2. Clamping tube; 201. Bearing; 202. Fixed circular plate; 203. Connecting shaft; 204. Support ring; 205. Fixed rod; 3. Electric control hydraulic rod; 301. Pressing piece; 4. Mold core; 401. Flange; 402. Bolt; 5. Spinning table; 501. Spinning device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0023] Please refer to Figures 1-4, an embodiment provided by the present invention: A cold spinning device for steel seamless gas cylinders, including a blank clamping and rotating device 1. In the middle upper end of one side end face inside the blank clamping and rotating device 1, a fixed pipe 101 is fixedly connected. One end of the fixed pipe 101 communicates with the outer side end face of the blank clamping and rotating device 1. Inside the fixed pipe 101, a clamping pipe 2 is rotatably connected. Between both sides inside the fixed pipe 101 and the outer side end face of the clamping pipe 2, they are all connected through bearings 201. One side of the clamping pipe 2 extends out of one side end face of the blank clamping and rotating device 1. On the outer side of the clamping pipe 2 and annularly arranged outside the blank clamping and rotating device 1, a plurality of electro-hydraulic rods 3 are fixedly connected. The telescopic ends of the plurality of electro-hydraulic rods 3 extend into the clamping pipe 2 and are all fixedly connected with pressing plates 301. A synchronizer is commonly connected between the plurality of electro-hydraulic rods 3. In the middle of the clamping pipe 2, a fixed circular plate 202 is fixedly connected. In the middle of the side end face of the fixed circular plate 202 facing the outside of the blank clamping and rotating device 1, a die core 4 is connected. On the side of the die core 4 adjacent to the fixed circular plate 202, a flange plate 401 is fixedly connected. Between the flange plate 401 and the fixed circular plate 202, they are fixedly connected through a plurality of bolts 402. One end of a gas cylinder tube blank with a diameter matching that of the die core 4 is sleeved on the die core 4. The gas cylinder tube blank is preliminarily fixed through the die core 4. Then, through the synchronous driving of the plurality of electro-hydraulic rods 3 to drive the plurality of pressing plates 301 to clamp and fix the outer wall of one end of the gas cylinder tube blank. When it is necessary to clamp gas cylinder tube blanks with different inner diameters, by disassembling the plurality of bolts 402, the die core 4 and its flange plate 401 are disengaged from the fixed circular plate 202, and then a die core 4 with a different diameter can be installed on the fixed circular plate 202, which is convenient for clamping and fixing gas cylinder tube blanks with different inner diameters.

[0024] Please refer to Figure 2 and Figure 4 , in the middle of the side end face of the fixed circular plate 202 facing the inside of the blank clamping and rotating device 1, a connecting shaft 203 is connected. In the middle upper end of the other side end face inside the blank clamping and rotating device 1, a driving motor 102 is fixedly connected. One end of the connecting shaft 203 extends out of one side of the clamping pipe 2 and is connected to the output shaft of the driving motor 102 through a coupling. On the connecting shaft 203 and inside the clamping pipe 2, a support ring 204 is fixedly connected. Between the outer side of the support ring 204 and the inner wall of the clamping pipe 2, they are fixedly connected through a plurality of fixing rods 205. Through the support ring 204 and the plurality of fixing rods 205, the connecting shaft 203 and the inner wall of the clamping pipe 2 are stably connected. By driving the connecting shaft 203 to rotate through the driving motor 102, the connecting shaft 203 drives the clamping pipe 2 to rotate, and further the clamping pipe 2 drives the clamped gas cylinder tube blank to rotate.

[0025] Please refer to Figure 1 and Figure 2 , at the lower end of one side end face of the blank clamping and rotating device 1, a spinning table 5 is fixedly connected. On the upper end of the spinning table 5, a spinning device 501 is arranged. The spinning device 501 is used for cold spinning processing of the gas cylinder tube blank clamped by the clamping pipe 2.

[0026] Working principle: When in use, first select a suitable die core 4 according to the inner diameter size of the gas cylinder tube blank to be processed, and fix the die core 4 on the fixed circular plate 202 through the flange 401 and bolts 402. After the tube blank is sleeved on the die core 4 for preliminary positioning, start the electric control hydraulic rod 3, and control the synchronous centripetal movement of multiple pressing plates 301 through the synchronizer to uniformly clamp the end of the tube blank from the outside. The driving motor 102 drives the clamping tube 2 and the fixed circular plate 202 to rotate integrally through the connecting shaft 203, and the support structure composed of the support ring 204 and the fixed rod 205 ensures the rotation stability. When the clamped tube blank rotates synchronously with the die core 4, the spinning device 501 moves along the spinning table 5 and performs cold spinning forming operation on the rotating tube blank. When processing tube blanks of different specifications, only need to replace the die core 4 with the corresponding size and adjust the clamping stroke of the electric control hydraulic rod 3 to achieve rapid changeover, effectively solving the problem that traditional equipment can only fix tube blanks with a single inner diameter.

[0027] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A cold rotation device for seamless steel gas cylinders, comprising a preform clamping and rotating device (1), characterized in that: A fixing tube (101) is fixedly connected to the upper middle end of one side end face of the preform clamping and rotating device (1), one end of the fixing tube (101) is in communication with the outer end face of the preform clamping and rotating device (1), a clamping tube (2) is rotatably connected to the inside of the fixing tube (101), one side of the clamping tube (2) extends out of the end face of one side of the preform clamping and rotating device (1), a plurality of electrically controlled hydraulic rods (3) are fixedly connected to the outside of the clamping tube (2) and in a circular array on the outside of the preform clamping and rotating device (1), the telescopic ends of the plurality of electrically controlled hydraulic rods (3) extend into the inside of the clamping tube (2) and are all fixedly connected to a pressing sheet (301), a fixing circular plate (202) is fixedly connected to the middle of the inside of the clamping tube (2), and a mold core (4) is connected to the middle of one side end face of the fixing circular plate (202) facing the outside of the preform clamping and rotating device (1).

2. A cold spinning device for seamless steel gas cylinders according to claim 1, characterized in that: The inner sides of the fixing tube (101) and the outer end surface of the clamping tube (2) are connected via bearings (201).

3. A cold spinning device for seamless steel gas cylinders according to claim 1, characterized in that: A connecting shaft (203) is connected to the middle of one end surface of the fixed circular plate (202) facing the inside of the preform clamping and rotating device (1), and a driving motor (102) is fixedly connected to the upper middle end of the other end surface of the preform clamping and rotating device (1).

4. A cold spinning device for seamless steel gas cylinders according to claim 3, characterized in that: One end of the connecting shaft (203) extends out of one side of the clamping tube (2) and is connected to the output shaft of the driving motor (102) via a coupling.

5. A cold spinning device for seamless steel gas cylinders according to claim 4, characterized in that: A support ring (204) is fixedly connected on the connecting shaft (203) and inside the clamping tube (2), and the outer side of the support ring (204) is fixedly connected to the inner wall of the clamping tube (2) via a plurality of fixing rods (205).

6. A cold spinning device for seamless steel gas cylinders according to claim 1, characterized in that: A flange (401) is fixedly connected to one side of the mold core (4) adjacent to the fixed circular plate (202), and the flange (401) and the fixed circular plate (202) are fixedly connected via a plurality of bolts (402).

7. A cold spinning device for seamless steel gas cylinders according to claim 1, characterized in that: The lower end of one end surface of the bottle blank clamping and rotating device (1) is fixedly connected to a spinning platform (5), and the upper end of the spinning platform (5) is provided with a spinning device (501).

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