A tool for spinning large-diameter seamless gas cylinders

Abstract

The present invention provides a tool for spinning large-diameter seamless gas cylinders, which is suitable for spinning operations of large-diameter ultra-short seamless gas cylinders, and the tool is safe, reliable, and easy to operate. The tool comprises: a clamping sleeve, one end of which is a closed end in the longitudinal direction and the other end is an open end, the inner ring wall of the open end being a tapered opening that closes inward from the port position; a screw; a coupling; a plurality of wedge blocks; and a floating connector, which comprises a large-diameter stop end and a small-diameter rod end; the screw is threadedly connected and passes through the center position of the closed end and then axially penetrates into the inner cavity of the clamping sleeve, the inner end of the screw is fixedly connected to the front end plate of the coupling, the floating connector is provided at the center position of the rear end plate of the coupling, and a central through hole is provided at the center position of the rear end plate, the aperture of the central through hole being larger than that of the small-diameter rod end and smaller than that of the large-diameter stop end, the large-diameter stop end being located in the cavity of the coupling, and the small-diameter rod end is arranged to protrude outward toward the open end after passing through the central through hole.

Description

Technical Field

[0001] The invention relates to the technical field of gas cylinder spinning equipment, in particular to a tool used for spinning large-diameter seamless gas cylinders. Background Art

[0002] Large-volume seamless gas cylinders are typically made by spinning large-diameter seamless steel pipes using a spinning machine. During the spinning operation, the front and rear clamping devices of the spinning machine clamp the ends of the seamless steel pipe. However, due to limitations in the structure and design of the spinning machine, the shortest distance between the front and rear clamping devices is usually around 5m. However, for most seamless gas cylinders containing high-purity electronic gases, their length is around 2m, which cannot be clamped by the front and rear clamping devices of the spinning machine. In actual production, shorter lengths of seamless steel pipes or semi-finished products with one end closed are usually welded together and then clamped on the spinning machine for spinning. Since the two parts of the seamless steel pipe or semi-finished product cannot be completely concentric during welding, the shape and precision of the spun end are affected. In addition, sometimes due to insufficient weld strength, the two parts of the workpiece break at the weld, leading to production accidents.

[0003] CN 209680869U discloses a short-spinning tool for manufacturing thin-walled, large-diameter, ultra-short gas cylinders. This tool must be secured to one end of the cylinder after the neck is spun. The spun neck requires machining and drilling holes in the neck to allow the tool's clamping plate and pressure plate to be inserted into the cylinder for securement. Once the clamping plate and pressure plate are inserted into the cylinder, manually rotating the pins to shift the clamping plate from a horizontal position to a vertical position is difficult due to the small diameter of the neck. Therefore, connecting the tool to the neck is extremely difficult.

[0004] Therefore, it is urgent to develop a tool suitable for spinning operations on ultra-short seamless gas cylinders. Summary of the Invention

[0005] In response to the above problems, the present invention provides a tool for spinning large-diameter seamless gas cylinders, which is suitable for spinning operations of large-diameter ultra-short seamless gas cylinders, and the tool is safe, reliable and easy to operate.

[0006] A tool for spinning large-diameter seamless gas cylinders, characterized in that it comprises:

[0007] A clamping sleeve, one end of which is a closed end in the longitudinal direction and the other end is an open end, wherein the inner ring wall of the open end is a tapered end that closes inward from the end position;

[0008] Screw;

[0009] Coupling;

[0010] Several wedge-shaped blocks;

[0011] and a floating connector including a large-diameter stop end and a small-diameter rod end;

[0012] The screw is threadedly connected and passes through the center position of the closed end, and then axially penetrates into the inner cavity of the clamping sleeve. The inner end of the screw is fixedly connected to the front end plate of the coupling. A floating connector is provided at the center position of the rear end plate of the coupling. A central through hole is provided at the center position of the rear end plate. The diameter of the central through hole is larger than that of the small-diameter rod end and smaller than that of the large-diameter stop end. The large-diameter stop end is located in the cavity of the coupling. The small-diameter rod end passes through the central through hole and is arranged to protrude toward the open end.

[0013] In the working state, the mouth of the gas cylinder is welded to the convex arrangement of the small-diameter rod end, part of the outer ring plug of the gas cylinder is installed in the cavity of the clamping sleeve, and a number of wedge blocks are installed in the annular gap between the inner ring wall of the open end and the outer ring surface of the gas cylinder. The gas cylinder and the clamping sleeve are combined to form a fixed integral structure, and the part of the gas cylinder to be spun is exposed.

[0014] It is further characterized by:

[0015] The closing angle of the tapered opening of the inner ring wall of the open end is 2° to 6°;

[0016] The diameter of the inner ring wall of the open end of the clamping sleeve is 2 to 8 mm larger than the outer diameter of the clamped workpiece, so that the workpiece can be easily inserted from the open end. The minimum diameter of the innermost end of the tapered opening of the clamping sleeve is 2 to 8 mm smaller than the outer diameter of the workpiece, so that the workpiece can be easily clamped when inserted.

[0017] The workpiece is a gas cylinder with a bottle mouth, a head and a bottle body, and the axial length of the tapered mouth is greater than the diameter of the head, ensuring that part of the cylinder of the gas cylinder penetrates into the clamping sleeve;

[0018] The wedge-shaped spacer ring is arranged in the annular gap between the inner annular wall of the open end and the outer annular surface of the gas cylinder, so that the central axes of the gas cylinder and the clamping sleeve are arranged in a central manner;

[0019] A screw nut is welded on the inner wall of the center hole of the closed end, and the screw is threadedly connected to the screw nut after passing through the center hole. A stop nut is sleeved on the outer end of the screw relative to the closed end. After the screw drives the clamping sleeve to move into place, the stop nut is tightly attached to the closed end to lock the screw;

[0020] The inner end of the screw rod passes through the front end plate of the coupling and is locked by a double nut structure. The double nut structure is specifically two locking nuts. The two locking nuts are respectively located on both sides of the front end plate, and the threads are sleeved on the corresponding axial positions of the screw rod, and the two locking nuts are respectively arranged close to the corresponding end faces of the front end plate.

[0021] A method for using a tool for spinning a large-diameter seamless gas cylinder, characterized in that: the gas cylinder is sawed according to a fixed length, and the bottle mouth of one end of the gas cylinder is trimmed so that a floating connector extends from the open end of a clamping sleeve; after the gas cylinder and the clamping sleeve are aligned, the floating connector is welded to the bottle mouth of the gas cylinder; a screw is twisted at the other end of the clamping sleeve by manual or mechanical assistance, and the rotation of the screw drives the gas cylinder to move in the clamping sleeve through a coupling, and the gas cylinder is clamped by the tapered mouth structure of the clamping sleeve; after the screw is screwed into place, the screw is locked, a corresponding wedge block is embedded in the part with a larger gap between the gas cylinder and the clamping sleeve, and the wedge block is hammered to make the gas cylinder and the clamping sleeve close together, so that the clamping sleeve and the gas cylinder become a tightly connected whole; and then the whole is clamped on a spinning machine to spin the exposed end of the gas cylinder;

[0022] After the spinning is completed, apply force to remove the wedge block, rotate the screw in the opposite direction, so that the mouth of the gas cylinder slowly extends out of the clamping sleeve, and saw the two apart at the weld where the floating connector and the mouth of the gas cylinder are connected.

[0023] It is further characterized by:

[0024] By timely replacing the floating connector according to the length of the small diameter rod end of the floating connector, you can ensure that the tooling can continue to work stably and reliably.

[0025] After adopting the present invention, the clamping sleeve has good rigidity, ensuring that no deformation occurs when clamping the gas cylinder; by converting the rotational motion of the screw into linear movement of the gas cylinder, a large torque can be applied to clamp the gas cylinder in the conical structure of the clamping sleeve; a coupling structure is adopted to enable the gas cylinder to move smoothly in the clamping sleeve; a floating connector is adopted to connect with the gas cylinder, which can automatically adjust the coaxiality of the gas cylinder, the screw and the clamping sleeve; a wedge block is embedded in the part with a gap between the gas cylinder and the clamping sleeve, making the connection between the two more secure; the spinning tooling has a simple structure, is firmly connected to the spinning workpiece, and is easy to operate; it can effectively ensure the coaxiality of the spinning tooling and the workpiece, avoiding the generation of large torsional torque during high-speed spinning operations due to eccentricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0027] The names corresponding to the serial numbers in the figure are as follows:

[0028] Clamping sleeve 10, closed end plate 11, open end 12, inner cavity 13, screw 20, coupling 30, front end plate 31, rear end plate 32, center through hole 33, cavity 34, wedge block 40, floating connector 50, large diameter stop end 51, small diameter rod end 52, gas cylinder 60, bottle mouth 61, head 62, bottle body 63, screw nut 70, stop nut 80, and lock nut 90. DETAILED DESCRIPTION

[0029] A tool for spinning large diameter seamless gas cylinders, see Figure 1 , which includes a clamping sleeve 10, a screw rod 20, a coupling 30, a plurality of wedge blocks 40, and a floating connector 50;

[0030] The clamping sleeve 10 has a closed end at one end in the longitudinal direction and an open end 12 at the other end. The inner ring wall of the open end 12 is a tapered opening that narrows inward from the port position. The closed end is provided with a closed end plate 11. The floating connector 50 includes a large-diameter stop end 51 and a small-diameter rod end 52.

[0031] The screw rod 20 is threadedly connected and passes through the center of the closed end plate 11, then axially extends into the inner cavity 13 of the clamping sleeve 10. The inner end of the screw rod 20 is fixedly connected to the front end plate 31 of the coupling 30. A floating connector 50 is provided at the center of the rear end plate 32 of the coupling 30. A central through-hole 33 is provided at the center of the rear end plate 32. The diameter of the central through-hole 33 is larger than that of the small-diameter rod end 52 and smaller than that of the large-diameter stop end 51. The large-diameter stop end 51 is located in the cavity 34 of the coupling 30. The small-diameter rod end 52 passes through the central through-hole 33 and protrudes outward toward the open end 12.

[0032] In the working state, the bottle mouth 61 of the gas cylinder 60 is welded to the convex end of the small-diameter rod end 52, and part of the outer ring plug of the gas cylinder 60 is installed in the inner cavity 13 of the clamping sleeve 10, and a number of wedge blocks 40 are installed in the annular gap between the inner ring wall of the open end 12 and the outer ring surface of the gas cylinder 60. The gas cylinder 60 and the clamping sleeve 10 are combined to form a fixed integral structure, and the part of the gas cylinder 60 to be spun is exposed.

[0033] The closing angle of the tapered opening of the inner ring wall of the open end 12 is 2° to 6°;

[0034] The diameter of the inner ring wall of the open end 12 of the clamping sleeve 10 is 2 to 8 mm larger than the outer diameter of the gas cylinder 60, which facilitates the entry of the gas cylinder from the open end. The minimum diameter of the innermost end of the tapered opening of the clamping sleeve is 2 to 8 mm smaller than the outer diameter of the gas cylinder, which facilitates the outer ring surface of the gas cylinder to be clamped when the gas cylinder is inserted;

[0035] The gas cylinder 60 includes a bottle mouth 61, a head 62 and a bottle body 63. The axial length of the tapered mouth is greater than the diameter of the head 62, ensuring that part of the cylinder of the gas cylinder 60 is deeply inserted into the clamping sleeve 10.

[0036] The wedge blocks 50 are arranged in an annular gap between the inner annular wall of the open end 12 and the outer annular surface of the gas cylinder 60 at intervals, so that the central axes of the gas cylinder 60 and the clamping sleeve 10 are aligned;

[0037] A screw nut 70 is welded to the inner wall of the center hole of the closed end plate 11. The screw 20 passes through the center hole and is threadedly connected to the screw nut 70. A stop nut 80 is sleeved on the outer end of the screw 20 relative to the closed end. After the screw 20 drives the clamping sleeve 10 to move into place, the stop nut 80 is tightly attached to the closed end plate 11 to lock the screw 20.

[0038] The inner end of the screw rod 20 passes through the front end plate 31 of the coupling 30 and is locked by a double nut structure. The double nut structure is specifically two locking nuts 90. The two locking nuts 90 are respectively located on both sides of the front end plate 31, and the threads are sleeved on the corresponding axial positions of the screw rod 20. The two locking nuts 90 are respectively arranged close to the corresponding end faces of the front end plate 31. During specific implementation, a notch is provided on the outer periphery of the cavity 34 of the coupling. The position of the notch is convenient for placing the locking nuts 90 and the floating connector 50 to ensure convenient operation.

[0039] In a specific implementation, the wall thickness of the clamping sleeve 10 is 20 to 30 mm, and the entire sleeve is quenched and tempered to have good strength and rigidity.

[0040] A method for using a tool for spinning a large-diameter seamless gas cylinder comprises the following steps: sawing the gas cylinder to a predetermined length, and aligning the bottle mouth at one end of the gas cylinder so that a floating connector extends from the open end of a clamping sleeve; aligning the gas cylinder with the clamping sleeve, welding the floating connector to the bottle mouth of the gas cylinder; manually or mechanically twisting a lead screw at the other end of the clamping sleeve; the rotation of the lead screw drives the gas cylinder to move within the clamping sleeve through a coupling; clamping the gas cylinder through the tapered mouth structure of the clamping sleeve; locking the lead screw after it is screwed into place; inserting 4 to 8 wedge-shaped blocks into a portion with a larger gap between the gas cylinder and the clamping sleeve; manually hammering the wedge-shaped blocks to make the gas cylinder and the clamping sleeve close together, so that the clamping sleeve and the gas cylinder form a tightly connected whole; and then clamping the whole on a spinning machine to spin the exposed end of the gas cylinder.

[0041] After spinning is completed, manually hammer from both sides of the wedge block, remove the wedge block, rotate the screw in the opposite direction, so that the cylinder mouth slowly extends out of the clamping sleeve, and saw the two apart at the weld where the floating connector and the cylinder mouth are connected.

[0042] During specific implementation, a new floating connector can be replaced in due time according to the length of the small-diameter rod end of the floating connector to ensure stable, reliable and continuous operation of the tooling.

[0043] The beneficial effects are as follows: the clamping sleeve has good rigidity, ensuring that no deformation occurs when clamping the gas cylinder; the rotational motion of the screw is converted into linear movement of the gas cylinder, and a large torque can be applied to clamp the gas cylinder in the conical structure of the clamping sleeve; a coupling structure is adopted to enable the gas cylinder to move smoothly in the clamping sleeve; a floating connector is used to connect the gas cylinder, which can automatically adjust the coaxiality of the gas cylinder, the screw and the clamping sleeve; a wedge block is embedded in the gap between the gas cylinder and the clamping sleeve to make the connection between the two more secure; the spinning tooling has a simple structure, is firmly connected to the spinning workpiece, and is easy to operate; it can effectively ensure the coaxiality of the spinning tooling and the workpiece, avoiding large torsional torque generated during high-speed spinning operations due to eccentricity.

[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0045] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A tool for spinning large diameter seamless gas cylinders, characterized in that: It includes: A clamping sleeve, one end of which is a closed end in the longitudinal direction and the other end is an open end, wherein the inner ring wall of the open end is a tapered end that closes inward from the end position; Screw; Coupling; Several wedge-shaped blocks; and a floating connector including a large-diameter stop end and a small-diameter rod end; The screw is threadedly connected and passes through the center position of the closed end, and then axially penetrates into the inner cavity of the clamping sleeve. The inner end of the screw is fixedly connected to the front end plate of the coupling. A floating connector is provided at the center position of the rear end plate of the coupling. A central through hole is provided at the center position of the rear end plate. The diameter of the central through hole is larger than that of the small-diameter rod end and smaller than that of the large-diameter stop end. The large-diameter stop end is located in the cavity of the coupling. The small-diameter rod end passes through the central through hole and is arranged to protrude toward the open end. In the working state, the mouth of the gas cylinder is welded to the convex arrangement of the small-diameter rod end, part of the outer ring plug of the gas cylinder is installed in the cavity of the clamping sleeve, and a number of wedge blocks are installed in the annular gap between the inner ring wall of the open end and the outer ring surface of the gas cylinder. The gas cylinder and the clamping sleeve are combined to form a fixed integral structure, and the part of the gas cylinder to be spun is exposed.

2. A tool for spinning large diameter seamless gas cylinders according to claim 1, characterized in that: The closing angle of the tapered opening of the inner ring wall of the open end is 2° to 6°.

3. The tool for spinning large-diameter seamless gas cylinders according to claim 1, characterized in that: The diameter of the inner ring wall of the open end of the clamping sleeve is 2 to 8 mm larger than the outer diameter of the clamped gas cylinder, and the minimum diameter of the innermost end of the tapered mouth of the clamping sleeve is 2 to 8 mm smaller than the outer diameter of the gas cylinder.

4. A tool for spinning large diameter seamless gas cylinders according to claim 3, characterized in that: The gas cylinder is a gas cylinder with a bottle mouth, a head and a bottle body.

5. The tool for spinning large diameter seamless gas cylinders according to claim 1, characterized in that: The wedge-shaped block spacer ring is arranged in the annular gap between the inner ring wall of the open end and the outer ring surface of the gas cylinder, so that the central axes of the gas cylinder and the clamping sleeve are arranged in a central manner.

6. The tool for spinning large diameter seamless gas cylinders according to claim 1, characterized in that: A screw nut is welded on the inner wall of the center hole of the closed end. The screw is threadedly connected to the screw nut after passing through the center hole. A stop nut is sleeved on the outer end of the screw relative to the closed end.

7. The tool for spinning large diameter seamless gas cylinders according to claim 1, characterized in that: The inner end of the screw rod passes through the front end plate of the coupling and is locked by a double nut structure. The double nut structure is specifically two locking nuts. The two locking nuts are respectively located on both sides of the front end plate, and the threads are sleeved on the corresponding axial positions of the screw rod, and the two locking nuts are respectively arranged close to the corresponding end faces of the front end plate.

8. The method for using the tool for spinning large-diameter seamless gas cylinders according to claim 1, characterized in that: Saw the gas cylinder to the specified length and align the mouth of the gas cylinder at one end so that the floating connector extends from the open end of the clamping sleeve. After aligning the gas cylinder and the clamping sleeve, weld the floating connector to the mouth of the gas cylinder. Twist the screw at the other end of the clamping sleeve manually or mechanically. The rotation of the screw drives the gas cylinder to move in the clamping sleeve through the coupling. The gas cylinder is clamped through the tapered mouth of the clamping sleeve. After the screw is screwed into place, lock the screw. Insert the corresponding wedge block into the part with the larger gap between the gas cylinder and the clamping sleeve. Hammer the wedge block to make the gas cylinder and the clamping sleeve close together, so that the clamping sleeve and the gas cylinder become a tightly connected whole. Then clamp the whole on the spinning machine and spin the exposed end of the gas cylinder. After the spinning is completed, apply force to remove the wedge block, rotate the screw in the opposite direction, so that the mouth of the gas cylinder slowly extends out of the clamping sleeve, and saw the two apart at the weld where the floating connector and the mouth of the gas cylinder are connected.

9. A method for using a tool for spinning large-diameter seamless gas cylinders according to claim 8, characterized in that: Replace the floating connector in time according to the length of the small diameter rod end of the floating connector.

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