A process for manufacturing ultra-thin metal tube

Abstract

The present invention relates to a process for manufacturing ultra-fine metal tubes, including a concave die, a left die, a right die, a needle guard and a convex die; a groove is arranged in the middle of the concave die, and the inner sides of the upper edge of the groove are respectively provided with rounded corners; the left die and the right die are arranged on both sides of the groove, and the inner lower edges are respectively provided with rounded corners; the center line of the needle guard coincides with the center line of the groove and is horizontally placed on one side of the concave die; the convex die is arranged directly above the groove; the left die, the right die, the needle guard and the convex die are respectively connected to their respective driving mechanisms. The benefit of the present invention is that the pre-cut sheet is put into the mold for rapid coiling, and then welded and formed, the tube making process is completed quickly, the production efficiency is extremely high, and the defective rate is low.

Description

Technical Field

[0001] The invention relates to a process for manufacturing an ultra-thin metal tube. Background Art

[0002] Ultrafine metal tubes are widely used, and there is a huge market demand in many fields such as medical treatment and industrial ultra-precision superconductivity. However, due to the current constraints of industry processing equipment and processes, the industry now manufactures ultrafine metal tubes by extrusion and stretching. The thicker and thicker metal tubes are extruded and stretched multiple times to make suitable ultrafine metal tubes. For example, the application number is 202120740379.5, and the patent name is "A device for processing ultrafine metal tubes", which is to extrude metal tubes of traditional diameters through a mold to make ultrafine metal tubes. Another example is the application number 202010798783.8, and the patent name is "An ultra-slender metal thin-walled tube extrusion molding die and method", which also manufactures ultrafine metal tubes by extrusion. The manufacture of ultrafine metal tubes by extrusion requires multiple extrusions or slow extrusions, so the production efficiency is low, and each ultrafine metal tube of a specification needs to be trial-produced multiple times, and the defect rate is high. Low production efficiency and high defect rate directly lead to high production costs. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a process for manufacturing ultra-thin metal tubes, which has high production efficiency, low defect rate, low production cost, and is also suitable for manufacturing metal tubes of different diameters.

[0004] The technical solution provided by the present invention is: a process for manufacturing an ultra-thin metal tube, comprising the following steps:

[0005] S1. Place the cut metal sheet into the mold;

[0006] S2. The metal sheet is rolled into a semi-finished tubular product with a seam in the mold;

[0007] S3. The semi-finished tubular product with seams is welded into a finished metal pipe.

[0008] The present invention selects metal sheets that meet the wall thickness according to the required specifications of the metal tube, such as wall thickness, inner and outer diameters, and shapes, cuts the sheets into sheets of the required shapes, and then rolls and welds the sheets into ultra-fine metal tubes, which is completely different from the traditional extrusion and stretching method. The technical solution of the present invention also has extremely high production efficiency for processing reducers. Because the technical solution of this patent is to roll the cut-to-shape sheets into metal tubes, therefore, as long as the sheets are made into the shape that is cut and flattened longitudinally according to the reducer, and then the punch, die and needle guard are made into a shape suitable for the reducer, a reducer with a large diameter at one end and a small diameter at the other end can be manufactured. This method is much more efficient than the traditional method of manufacturing reducers by multiple extrusion and stretching.

[0009] According to the above-mentioned process for manufacturing ultrafine metal tubes, the present invention provides an equipment for manufacturing ultrafine metal tubes, including a mold mechanism; the mold mechanism includes a concave mold, a left mold, a right mold, a needle guard and a punch on a lower mold base; a groove is arranged in the middle of the concave mold, and rounded corners are arranged on both inner sides of the upper edge of the groove; the left mold and the right mold are arranged on both sides of the groove, and rounded corners are arranged on the inner lower edges respectively; the center line of the needle guard coincides with the center line of the groove and is horizontally placed on one side of the concave mold; the punch is arranged directly above the groove; the left mold, the right mold, the needle guard and the punch are respectively connected to their respective driving mechanisms.

[0010] As a further improvement, the lower part of the die is connected to the driving mechanism; a support rack is also arranged on the lower die base; the support rack is provided with a support platform with a thickness slightly smaller than the width of the groove, and the support platform can be inserted into the groove.

[0011] As a further improvement, it also includes a feeding mechanism; the feeding mechanism includes a feeding plate, and a material rack is arranged above the feeding plate; a material trough is arranged on the feeding plate directly below the material rack; the feeding plate is connected to the driving mechanism.

[0012] As a further improvement, it also includes a welding mechanism; the welding mechanism is provided with a welding head and a blowing pipe.

[0013] As a further improvement, a detection mechanism is also included; the detection head of the detection mechanism is located above the groove.

[0014] As a further improvement, it also includes a screening mechanism; the screening mechanism includes a moving frame, and a suction head is arranged below one end of the moving frame; the moving frame is connected to the driving mechanism.

[0015] As a further improvement, it also includes a finished metal tube taking-up mechanism; the tube taking-up mechanism includes a moving frame, and a suction head is arranged below one end of the moving frame; the moving frame is connected to the driving mechanism.

[0016] As a further improvement, the lower die seat is arranged on the workbench, and the workbench is arranged on the annular conveying device; the feeding mechanism, the upper die seat of the mold mechanism, the welding mechanism, the detection mechanism, the screening mechanism, and the tube taking mechanism are distributed in sequence around the outside of the annular conveying device; a driving mechanism is arranged on the inside of the annular conveying device; the workbench moves and stays in a certain direction along with the annular conveying device as set.

[0017] In the technical solution of the present invention, the workbench is arranged on a ring conveying device equipped with a driving mechanism. It should be particularly noted that the ring refers to the running track of the workbench, and does not specifically refer to the support structure of the workbench being a ring. The ring can be a non-standard ring such as a circular ring or a ring with two opposite sides of the middle square being circular. The present invention is preferably a ring with two opposite sides of the middle square being circular, and there are relative straight edges to facilitate the placement of other mechanisms and equipment. The feeding mechanism, the upper die seat of the mold mechanism, the welding mechanism, the detection mechanism, the screening mechanism, and the pipe taking mechanism are distributed around the outer side of the ring conveying device in sequence. When the equipment is working, the prefabricated sheet is placed in the material rack, and the sheet at the bottom of the material rack falls into the material trough. Under the action of the belt of the driving mechanism, the feeding plate sends the sheet to the support platform of the support rack of the mold mechanism. At this time, the convex mold descends under the action of the driving mechanism to support the sheet, and the concave mold rises under the action of the driving mechanism. The support platform is inserted into the groove, and the sheet falls on the groove, and then the left mold and the right mold extend under the action of the driving mechanism, and the rounded corners of the left mold and the right mold are pressed against the two straight edges of the sheet to shape the metal tube. Then the punch is retracted, and the needle guard is inserted into the lower arc formed by the sheet under the action of the driving mechanism. Then the left and right molds continue to extend under the action of the driving mechanism until the two straight edges of the sheet are pressed on the surface of the needle guard. At this time, the rounded corners of the groove and the rounded corners of the left and right molds together form a circle with an open upper end. The sheet has been rolled into a tubular semi-finished product, and a seam is formed on the upper part of the semi-finished product. After that, the workbench moves forward on the circular conveyor device and reaches the welding station. A laser head is installed outside the welding mechanism to weld the seams on the semi-finished product together. At the same time, the air blow pipe is aimed at the welding part to continuously spray inert gas to prevent the weld from oxidizing and discoloring. After welding is completed, the workbench continues to move forward and reaches the inspection station. The inspection head of the inspection mechanism visually inspects the weld. After the inspection, the workbench moves to the screening station. If defective products are found at the inspection station, the needle guard withdraws from the metal tube under the action of the drive mechanism at the screening station, and the mobile frame moves to the defective product under the action of the drive mechanism. The defective product is taken away by the tube remover. Then the workbench continues to move forward to the tube removal station. At the tube removal station, the needle guard withdraws from the metal tube under the action of the drive mechanism, and the mobile frame moves to the metal tube under the action of the drive mechanism. The qualified finished metal tube is taken away by the tube remover and placed. Of course, the screening mechanism and the tube removal mechanism can also be combined into one. The screening mechanism directly distinguishes good products from defective products, and the tube remover takes them out of the mold at the same time and places them separately.

[0018] The invention is beneficial in that the pre-cut sheets are put into the mold for rapid coiling and then welded and formed, the pipe making process is completed quickly, the production efficiency is extremely high, the defect rate is low, and the detection, screening and finished product collection are completed continuously in the same equipment, further improving the production efficiency. The technical solution of the invention is also very suitable for manufacturing different diameter metal pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a schematic diagram of the equipment layout for manufacturing ultra-thin metal tubes according to the present invention.

[0020] Figure 2 It is a schematic diagram of the feeding mechanism and the lower die base of the present invention.

[0021] Figure 3 It is a front view schematic diagram of the mold mechanism of the present invention.

[0022] Figure 4 It is a front view schematic diagram of the welding mechanism of the present invention.

[0023] Figure 5 It is a front view schematic diagram of the detection mechanism of the present invention.

[0024] Figure 6 It is a front view schematic diagram of the screening mechanism of the present invention.

[0025] Figure 7 It is a front view schematic diagram of the tube removal mechanism of the present invention. DETAILED DESCRIPTION

[0026] like Figures 1 to 3The device for manufacturing ultra-fine metal tubes shown in the figure comprises an annular conveying device 1, which comprises a track 11 and a driving mechanism 12. There are pipe making stations, welding stations, testing stations, screening stations and pipe taking stations surrounding the outer side of the annular conveying device 1 in sequence. A workbench 2 is installed on the track 11, and a lower die seat 41 is installed on the workbench 2. The workbench 2 slides on the track 11 and stops at each station according to the program setting. The pipe making station comprises a feeding mechanism 3 and a mold mechanism 4. The feeding mechanism comprises a feeding plate 31, which is connected to a driving mechanism 34, and the feeding plate 31 is driven forward and backward by the driving mechanism 34 through a screw rod. A material rack 32 is arranged above the feeding plate 31; a material trough 33 is arranged on the feeding plate directly below the material rack 32. The mold mechanism 4 comprises a concave mold 411, a left mold 412, a right mold 413, a needle guard 414 arranged on the lower die seat 41, and a convex mold 421 on the upper die seat 42. The die 411 is connected to the driving mechanism 415 through a guide rail. A groove 4111 is provided in the middle of the die 411, and fillets 4112 are provided on both inner sides of the upper edge of the groove 4111. The left die 412 and the right die 413 are respectively located on both sides of the groove 4111, and fillets 4121 are provided on the inner lower edges. The left die is connected to the driving mechanism 416 through a guide rail, and the right die is connected to the driving mechanism 417 through a guide rail. The fillet 4112 of the groove and the fillets 4121 of the left and right dies together form a circle whose upper end is not closed. The center line of the needle guard 414 coincides with the center line of the groove 4111, is horizontally placed on one side of the die, and is connected to the driving mechanism 418 through a guide rail. The punch 421 is arranged directly above the groove 4111; the punch 421 is connected to the driving mechanism 422 through a screw rod. A support frame 419 is also fixed on the lower die base 41. One end of the upper part of the support frame 419 extending toward the groove is a square platform with a thickness slightly smaller than the width of the groove 4111, which can be inserted into the groove.

[0027] like Figure 4 As shown, the welding mechanism 5 of the welding station is provided with a laser welding head 51 and a blowing pipe 52. The welding head is connected to a driving mechanism 53.

[0028] like Figure 5 As shown, a visual inspection head 61 is fixed on the inspection mechanism 6 of the inspection station.

[0029] like Figure 6 As shown, the screening mechanism 7 of the screening station has a moving frame 71, a suction head 72 is arranged below one end of the moving frame 71, and the moving frame 71 is connected to the driving mechanism 73 through a screw rod.

[0030] like Figure 7 As shown, the tube-taking mechanism 8 of the tube-taking station has a moving frame 81, a suction head 82 is arranged below one end of the moving frame 81, and the moving frame 81 is connected to the driving mechanism 83 through a screw rod.

[0031] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the present invention.

Claims

1. A process for manufacturing an ultra-thin metal tube, characterized in that: The steps include: S1. Place the cut metal sheet into the mold; S2. The metal sheet is rolled into a semi-finished tubular product with a seam in the mold; S3. The semi-finished tubular product with seams is welded into a finished metal pipe; A device for manufacturing ultra-fine metal tubes is used, comprising a mold mechanism; the mold mechanism comprises a concave mold, a left mold, a right mold, a needle guard arranged on a lower mold base, and a convex mold on an upper mold base; a groove is arranged in the middle of the concave mold, and rounded corners are arranged on both inner sides of the upper edge of the groove; the left mold and the right mold are arranged on both sides of the groove, and rounded corners are arranged on the inner lower edges; the center line of the needle guard coincides with the center line of the groove and is horizontally arranged on one side of the concave mold; the convex mold is arranged just above the groove; the left mold, the right mold, the needle guard, and the convex mold are respectively connected to their own driving mechanisms; The lower part of the concave die is connected to the driving mechanism; a supporting frame is also arranged on the lower die seat; the supporting frame is provided with a support platform with a thickness slightly smaller than the width of the groove, and the support platform can be inserted into the groove.

2. A process for manufacturing ultra-thin metal tubes according to claim 1, characterized in that: It also includes a feeding mechanism; the feeding mechanism includes a feeding plate, a material rack is arranged above the feeding plate; a material trough is arranged on the feeding plate just below the material rack; the feeding plate is connected to the driving mechanism.

3. A process for manufacturing ultra-thin metal tubes according to claim 2, characterized in that: The device also comprises a welding mechanism; a welding head and a blowing pipe are arranged on the welding mechanism.

4. A process for manufacturing ultra-thin metal tubes according to claim 3, characterized in that: It also includes a detection mechanism; a detection head of the detection mechanism is located above the groove.

5. A process for manufacturing ultra-thin metal tubes according to claim 4, characterized in that: It also includes a screening mechanism; the screening mechanism includes a moving frame, and a tube remover is arranged below one end of the moving frame; the moving frame is connected to the driving mechanism.

6. A process for manufacturing ultra-thin metal tubes according to claim 5, characterized in that: It also includes a finished metal pipe taking mechanism; the pipe taking mechanism includes a moving frame, and a pipe taker is arranged below one end of the moving frame; the moving frame is connected to the driving mechanism.

7. A process for manufacturing ultra-thin metal tubes according to claim 6, characterized in that: The lower die seat is arranged on a workbench, and the workbench is arranged on an annular conveying device; a feeding mechanism, an upper die seat of a mold mechanism, a welding mechanism, a detection mechanism, a screening mechanism, and a tube taking mechanism are sequentially distributed around the outer side of the annular conveying device; a driving mechanism is arranged on the inner side of the annular conveying device; The workbench moves and stays in a certain direction along with the ring conveyor according to the settings.

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