An application method for continuous marking on the inner and outer surfaces of pipe materials

Abstract

The present invention discloses an application method for continuously marking the inner and outer surfaces of pipes. The marking of the inner and outer sides of the pipe raw materials is completed by two groups of marking devices, including five steps from the first step to the fifth step. In the third step, the pipe preparation unit pauses operation, and the marking device on the side moves along the plate part towards the conical part and completes the internal marking in the unclosed area at the front end of the conical part. The marking device cooperates with the pipe preparation unit for marking. The marking process of this method is used in conjunction with the pipeline production and processing, and can complete the continuous marking on both the inner and outer sides of the pipeline. On the one hand, it makes the entire pipe production line more efficient, and on the other hand, it ensures the marking effect of the pipe, and the indication meaning of the mark is better. The inner marking method of this method weakens the influence of pipe forming on the marking effect as much as possible. After the marking is completed, the marks on the inner and outer sides of the pipeline are clear, meeting the real-time production requirements.

Description

Technical Field

[0001] The present invention relates to the field of pipe marking, and particularly to an application method for continuous marking on the inner and outer sides of pipes. Background Art

[0002] In pipe production, it is necessary to mark the pipes. Marking can be used to record product information. When product quality problems occur, it is convenient to find out loopholes in the production process.

[0003] In the prior art, pipe fittings are mainly marked on the outer side of the pipes so that people can clearly see the marking content. However, in this way, the marking content is easily worn and oxidized over time. When product problems occur, it is very difficult to trace product information through the pipe surface. Therefore, in order to ensure that the marking content can be easily reviewed and can be stored for a long time, the inner and outer sides of the pipes can be marked. However, when marking the inside of the pipes, the following problems will occur:

[0004] For internal marking of pipes, the first method is to mark before the pipes are formed (mark when the pipes are still in the plate state), and the other is to mark the tubular pipes after the pipes are formed. When marking before forming, due to the bending and deformation of the pipes during the forming process, the original marking content will be misaligned and distorted, resulting in a general actual indication effect. The document with the patent application number CN202120120305.1 proposed a marking machine that can mark inside the product. When marking after the pipeline is formed, due to the certain volume of the marking device, when the pipes are small, this marking method cannot be realized. At the same time, the continuity of marking is insufficient (the length of the marking device extending into the pipe is limited), and it is necessary to use a pipe cutting and segmented marking method, resulting in a poor overall marking efficiency. Moreover, in both of these two methods, the marking time period is inconsistent with the actual production and forming time period of the product, which leads to further editing of the marking content during marking, further increasing the workload. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies in the prior art, and a method for continuous marking on the inner and outer sides of pipes is proposed.

[0006] 2. To achieve the above purpose, the present invention adopts the following technical solutions: Two groups of marking devices are used to complete the marking on the inner and outer sides of the pipe raw materials respectively. One group of marking devices is arranged at the end of the pipe preparation unit, and the other group of marking devices is arranged on one side of the pipe preparation unit, including the following steps:

[0007] The first step is to place the pipe raw materials on the pipe preparation unit and assemble the two groups of marking devices.

[0008] Second step: The pipe manufacturing unit operates, and the pipe raw materials are sequentially prepared and formed through the pipe manufacturing unit. During the preparation and forming process, the pipe raw materials are divided into a formed circular pipe part, a semi-formed conical part, and an unprocessed plate part;

[0009] Third step: The pipe manufacturing unit operates continuously, and the marking device on the side moves along the plate part towards the conical part and completes internal marking in the unclosed area at the front end of the conical part;

[0010] Fourth step: The marking device on the side moves from the conical part towards the plate part, the pipe manufacturing unit is synchronously started, and the marking device at the end selects a marking position to complete external marking;

[0011] Fifth step: Repeat the second step to the fourth step to complete continuous marking of the pipe.

[0012] Preferably, the marking device on the side performs marking on one side of the unclosed edge of the conical part.

[0013] Preferably, the ratio of the distance between the marking point of the marking device on the side and the unclosed edge of the conical part to the width of the pipe raw material is less than one-tenth.

[0014] Preferably, a translation mechanism is provided at the bottom of the marking device on the side, and the marking device at the end is fixedly installed at the end of the pipe manufacturing unit.

[0015] Preferably, the marking point of the marking device at the end and the weld of the circular pipe part are in different areas.

[0016] Preferably, an identification device is provided on the marking device.

[0017] Preferably, the marking device is a laser or other type of marking device.

[0018] Preferably, the marking point of the marking device on the side avoids the feeding rollers of the pipe manufacturing unit and the area where the mold acts on the pipe manufacturing unit.

[0019] Preferably, the pipe production unit includes a high-frequency straight seam welded pipe unit, a spiral welded pipe unit, a profile unit, a metal pipe unit, and a continuous stamping device.

[0020] Preferably, the marking head of the marking device is connected with a universal rotation mechanism.

[0021] The present invention has the following beneficial effects:

[0022] 1. The marking device cooperates with the pipe manufacturing unit for marking. The marking process of this method is used in conjunction with the production and processing of pipes, and can complete continuous marking on both the inner and outer sides of the pipe. On the one hand, it makes the entire pipe production line more efficient, and on the other hand, it ensures the marking effect of the pipe, and the indication meaning of the marking is better;

[0023] 2. The inner side marking method of this method minimizes the impact of pipe forming on the marking effect. After marking, the markings on the inside and outside of the pipe are clear, meeting the real-time production requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the principle structure proposed by the present invention;

[0025] Figure 2 It is an effect diagram of the finished product proposed by the present invention.

[0026] LEGEND DESCRIPTION:

[0027] 1. Marking device; 2. Pipe manufacturing unit; 3. Pipe raw material. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0030] 3. Refer to Figure 1-2, an embodiment provided by the present invention: The marking of the inner and outer sides of the pipe raw material 3 is completed by two sets of marking devices 1 respectively. One set of marking devices 1 is arranged at the end of the pipe preparation unit 2, and the other set of marking devices 1 is arranged on one side of the pipe preparation unit 2, including the following steps:

[0031] First step, place the pipe raw material 3 on the pipe preparation unit 2 and assemble the two sets of marking devices 1.

[0032] Second step, the pipe preparation unit 2 operates, and the pipe raw material 3 is sequentially formed through the pipe preparation unit 2. During the forming process, the pipe raw material 3 is divided into a formed circular pipe part, a semi-formed conical part, and an unprocessed plate part.

[0033] Third step, the pipe preparation unit 2 operates continuously. The marking device 1 on the side moves along the plate part towards the conical part and completes the internal marking at the unclosed area at the front end of the conical part.

[0034] Fourth step, the marking device 1 on the side moves from the conical part towards the plate part, and the pipe preparation unit 2 is synchronously started. The marking device 1 at the end selects the marking position and completes the external marking.

[0035] Fifth step, repeat the second step to the fourth step to complete the continuous marking of the pipe.

[0036] Furthermore, the marking device 1 on the side performs marking on one side of the unclosed edge of the conical part.

[0037] Furthermore, the ratio of the distance between the marking point of the marking device 1 on the side and the unclosed edge of the conical part to the width of the pipe raw material 3 is less than one-tenth.

[0038] Through this technical solution, the position of the inner marking point rotates close to the pipe weld, but maintains a certain distance from the pipe weld. The pipe raw material 3 near the pipe weld has relatively small deformation, and the marking has little impact on the marking during the complete forming process of the pipe, which can meet the later identification requirements.

[0039] Furthermore, a translation mechanism is provided at the bottom of the marking device 1 on the side, and the marking device 1 at the end is fixedly installed at the end of the pipe preparation unit 2.

[0040] Through this technical solution, when performing the inner marking, the marking content should be marked at the part with the highest forming degree of the pipe as much as possible, so that the influence of the marking content during the pipe forming is small. This requires the translation mechanism to send the marking device 1 in, and after the marking is completed, the marking device 1 also needs to be moved out to avoid affecting the subsequent forming; when performing the outer marking, since it is marking on the outer side of the formed regular pipe, the marking device 1 does not require adjustment by the translation mechanism.

[0041] Furthermore, the marking point of the marking device 1 at the end and the weld of the round tube are located in different areas.

[0042] With this technical solution, marking on the outside of the pipeline needs to avoid the welds of the pipe fittings to prevent the welds from affecting subsequent identification results.

[0043] Furthermore, the marking device 1 is provided with an identification device.

[0044] Furthermore, the marking device 1 is a laser or other marking device.

[0045] Furthermore, the marking point of the side marking device 1 avoids the action area of ​​the feeding roller and the mold of the pipe preparation unit 2.

[0046] Through this technical solution, the inner marking point avoids the roller and the forming molded part, minimizing the impact of the inner marking mark during the forming process.

[0047] Furthermore, the pipe production unit 2 includes a high-frequency straight seam welded pipe unit, a spiral welded pipe unit, a profile unit, a metal pipe unit and a continuous stamping device.

[0048] Through this technical solution, the pipe production unit 2 is mainly a forming unit for the pipe raw material 3.

[0049] Furthermore, the marking head of the marking device 1 is connected with a universal rotation mechanism.

[0050] Working principle: two groups of marking equipment 1 are set up to mark the pipe from the inside and outside of the pipe respectively. Among them, the marking equipment 1 for marking the inside of the pipe is used in conjunction with the pipe preparation unit 2. During the forming process of the pipe raw material 3 in the pipe preparation unit 2, the marking equipment 1 moves to the unclosed edge of the tapered part of the pipe raw material 3 for marking. During the whole process, the marking process is used in conjunction with the pipe production and processing, and can complete continuous marking on both the inside and outside of the pipe. The inner marking point selects the pipe raw material 3 that is not closed but close to the closed state, thereby reducing the impact of the marking mark during the forming process, so that the marking content on the inside fully meets the production identification requirements.

[0051] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An application method for continuous marking on the inner and outer surfaces of pipes, which uses two sets of marking devices (1) to complete the marking on the inner and outer sides of the pipe raw material (3) respectively. One set of marking devices (1) is arranged at the end of the pipe preparation unit (2), and the other set of marking devices (1) is arranged on one side of the pipe preparation unit (2), characterized in that: It includes the following steps: First step, place the pipe material raw material (3) on the pipe preparation unit (2), and assemble the two sets of the marking devices (1); Second step, the pipe preparation unit (2) operates, and the pipe material raw material (3) is successively prepared and formed through the pipe preparation unit (2). During the preparation and forming process, the pipe material raw material (3) is divided into a formed round pipe part, a semi-formed conical part, and an unprocessed plate part; Third step, the pipe preparation unit (2) operates continuously, and the side marking device (1) moves along the plate part towards the conical part, and completes internal marking at the unclosed area at the front end of the conical part; Fourth step, the side marking device (1) moves from the conical part towards the plate part, the pipe preparation unit (2) is synchronously started, and the end marking device (1) selects a marking position and completes external marking; Fifth step, repeat the second step to the fourth step to complete continuous marking of the pipe; The pipe preparation unit (2) includes a high-frequency straight seam welded pipe unit, a spiral welded pipe unit, a profile unit, a metal pipe unit, and a continuous stamping device.

2. The application method for continuous marking on the inner and outer surfaces of a pipe according to claim 1, characterized in that: The side marking device (1) performs marking on one side of the unclosed edge of the conical part.

3. The application method for continuous marking on the inner and outer surfaces of a pipe according to claim 1, characterized in that: The ratio of the distance between the marking point of the side marking device (1) and the unclosed edge of the conical part to the width of the pipe material raw material (3) is less than one-tenth.

4. A method of application for continuous marking on the inner and outer surfaces of a pipe according to claim 1, characterized in that: A translation mechanism is provided at the bottom of the side marking device (1), and the end marking device (1) is fixedly installed at the end of the pipe preparation unit (2).

5. The application method for continuous marking on the inner and outer surfaces of a pipe according to claim 1, characterized in that: The marking point of the end marking device (1) and the weld of the round pipe part are located in different areas.

6. The application method for continuous marking on the inner and outer surfaces of a pipe according to claim 1, characterized in that: An identification device is provided on the marking device (1).

7. A method of application for continuous marking on the inner and outer surfaces of pipes according to claim 1, characterized in that: The marking device (1) is selected from a laser or other types of marking devices.

8. A method of application for continuous marking on the inner and outer surfaces of a pipe according to claim 1, characterized in that: The marking point of the side marking device (1) avoids the feeding rollers and the die of the pipe preparation unit (2) and the acting area of the pipe preparation unit (2).

9. The application method for continuous marking on the inner and outer surfaces of a pipe according to claim 1, characterized in that: The marking head of the marking device (1) is connected with a universal rotation mechanism.

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