An automatic core lining device for the end of a precision drawn metal pipe and its implementation method

Abstract

The present invention belongs to the technical field of automatic core lining in the process of high-precision pipe drawing, and provides an automatic core lining device for the end of a precision drawn metal pipe, which includes two cylinders arranged on a drawing trolley: a first cylinder and a second cylinder. The first cylinder is connected to a clamp through a connecting mechanism and is used to control the opening and closing of the clamp. A core is arranged at the end of the telescopic rod of the second cylinder to achieve automatic core lining. The present invention uses two cylinders to respectively achieve clamping of the pipe end and automatic core lining. During production, the second cylinder pushes the core into the pipe end, and the first cylinder drives the clamp to clamp the pipe end to achieve automatic core lining. After the drawing operation is completed, the two cylinders retract, and then the second automatic core lining operation is carried out. Compared with the existing manual core lining, the production efficiency of the present invention is higher, the quality is better, and there are no safety hazards.

Description

Technical Field

[0001] The present invention belongs to the technical field of automatic core lining in the process of high-precision tube drawing, and specifically relates to an automatic core lining device for the tube end of precision drawing of metal tubes and a method for realizing the same. Background Art

[0002] Currently, in the production process of drawing root products from coil stock using precision drawing equipment, for thin-walled tubes and tubes with a large processing rate, when the drawing carriage grips the tube end and stretches, the tube end is easily broken, affecting the continuity and sustainability of automatic production. In the prior art, it is often necessary to manually insert a small section of core lining into the tube port to reduce the degree of end deformation caused by the drawing carriage gripping the tube end, thereby avoiding the tube end from being broken. After drawing one product, the core lining is manually inserted into the next pre-drawn tube end, and so on in a cycle to ensure the smooth progress of product drawing production. In addition, the current production operation method for this special tube type requires manual continuous core lining, while the equipment is in an automatic operation state, and manual operation poses a great safety hazard. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems that in the current production of thin-walled tubes and metal tubes with a large processing rate, manual core lining operation has safety hazards and is difficult to meet production requirements, and provides an automatic core lining device for the tube end of precision drawing of metal tubes.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] An automatic core lining device for the tube end of precision drawing of metal tubes includes two cylinders arranged on the drawing carriage: a first cylinder and a second cylinder. The first cylinder is connected to a clamp through a connecting mechanism and is used to control the opening and closing of the clamp. A core lining is provided at the end of the telescopic rod of the second cylinder to achieve automatic core lining.

[0006] Further, the first cylinder and the second cylinder are arranged side by side longitudinally, and the first cylinder is located above the second cylinder.

[0007] Further, the connecting mechanism includes a connecting panel provided at the end of the telescopic rod of the first cylinder, rotating connecting arms provided on both sides of the connecting panel, and the rotating connecting arms connect the clamp; a first through hole for the core lining to pass through is further provided at the lower part of the connecting panel.

[0008] Further, the rotating connecting arm includes a main connecting arm rotatably connected to the connecting panel, and a sub-connecting arm rotatably connected to one end of the main connecting arm, and the other end of the sub-connecting arm connects the clamp.

[0009] Further, the core lining is a square core rod with a taper.

[0010] Further, the edges and corners of the liner core are rounded.

[0011] Further, the first cylinder and the second cylinder are arranged on the drawing trolley through a first mounting panel.

[0012] Further, a first panel is arranged at the end of the first cylinder, and a second panel is arranged at the end of the second cylinder. The first panel and the second panel are vertically mounted on a second mounting panel.

[0013] Further, the first panel is located between the connecting panel and the second panel, and a second through hole corresponding to the first through hole is arranged on the first panel.

[0014] The present invention also provides a method for realizing the above-mentioned automatic liner core device for precision drawing of the end of a metal pipe, including:

[0015] (1) When the drawing trolley moves to the origin of the die holder, the second cylinder pushes the liner core into the pipe end, and the first cylinder acts to push the clamp to clamp the end of the pipe.

[0016] (2) The drawing trolley advances for drawing production. After drawing to the set length dimension, it is sawed online. The first cylinder retracts, driving the clamp to open, and the second cylinder retracts, and the liner core follows and exits from the pipe end.

[0017] Further, when the first drawn pipe of each basket of materials is drawn, the first cylinder acts and the second cylinder does not act.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention uses two cylinders to separately realize the clamping of the end of the pipe and the automatic liner core. During production, the first cylinder drives the clamp to clamp the end of the pipe, and the second cylinder pushes the liner core into the pipe end to realize automatic liner core. After completing the drawing operation, the two cylinders retract, and then the second automatic liner core operation is carried out. Compared with the existing manual liner core, the production efficiency of the present invention is higher, the quality is better, and there are no safety hazards. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the present invention.

[0021] Figure 2 is a cross-sectional schematic diagram of the present invention.

[0022] Among them, the names corresponding to the reference numerals are as follows: 1 - first cylinder; 2 - second cylinder; 3 - lining core; 4 - clamp; 5 - connection panel; 6 - main connection arm; 7 - first through hole; 8 - first mounting panel; 9 - first panel; 10 - second panel; 11 - second mounting panel; 12 - auxiliary connection arm; 13 - die holder; 14 - pipe; 15 - guide rail; 16 - guide rail slider; 17 - drawing trolley bottom plate. Detailed implementation manners

[0023] In order to enable those skilled in the art to have a clearer understanding and knowledge of the present invention, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described below are only used to explain the present invention for easy understanding, and the technical solutions provided by the present invention are not limited to the technical solutions provided by the following embodiments, and the technical solutions provided by the embodiments should not limit the protection scope of the present invention.

[0024] Those skilled in the art should understand that in the disclosure of the present invention, the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are 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. Therefore, the above terms should not be construed as limiting the present invention.

[0025] Embodiment 1

[0026] As Figure 1 、 2 shown, this embodiment provides an automatic lining core device for precision drawing of the pipe end of a metal pipe, including two cylinders arranged on the drawing trolley: a first cylinder and a second cylinder. The first cylinder is connected to the clamp through a connecting mechanism and is used to control the opening and closing of the clamp. A lining core is arranged at the end of the telescopic rod of the second cylinder to achieve automatic lining core. Among them, both the drawing trolley and the clamp are existing known structures. The first cylinder and the second cylinder are installed on the drawing trolley bottom plate. The drawing trolley is installed on the guide rail through a guide rail slider. The output ends of the telescopic rods of the two cylinders correspond to the die holder, so no further description will be given here.

[0027] The first cylinder and the second cylinder are arranged side by side longitudinally. The two are arranged on the drawing trolley through a first mounting panel. Mounting holes are provided on both sides of the bottom of the first mounting panel. The cylinder bodies of the two cylinders are one long and one short. Specifically, the first cylinder is longer than the second cylinder, and the first cylinder is located above the second cylinder.

[0028] At the output ends of the telescopic rods (piston rods) of the first cylinder and the second cylinder, there are panels, namely the first panel and the second panel respectively. On both the first panel and the second panel, there are holes for the telescopic rods to extend into. At the lower part of the first panel and the second panel, there is a second mounting panel, and the two are perpendicular to the second mounting panel. The function of this structural design is to support the cylinders.

[0029] The end of the telescopic rod of the first cylinder is connected with a connecting mechanism. The telescopic rod of the first cylinder drives the connecting mechanism to act. The connecting structure includes a connecting panel arranged at the end of the telescopic rod of the first cylinder, rotating connecting arms arranged on both sides of the connecting panel, and the rotating connecting arms are connected with the clamp; at the lower part of the connecting panel, there is also a first through hole for the core to pass through. At the same time, on the first panel, there is a second through hole corresponding to the first through hole, and both the first through hole and the second through hole are used for the core to pass through. The rotating connecting arm includes a main connecting arm rotatably connected with the connecting panel, and a sub - connecting arm with one end rotatably connected with the main connecting arm. The other end of the sub - connecting arm is connected with the clamp. The telescopic rod of the first cylinder drives the connecting panel to push forward and backward, the connecting panel drives the rotating connecting arms to move forward or backward, and at the same time, the rotating connecting arms rotate, driving the clamp to clamp or open.

[0030] In this embodiment, the core is a square core rod with a taper. At the same time, the edges and corners of the core are rounded. The size of the core is slightly smaller than the inner diameter of the metal pipe, and the length of the core matches the length of the tube end clamped by the drawing trolley. Through the above settings, it is convenient for the core rod to penetrate into the tube end.

[0031] Embodiment 2

[0032] This embodiment provides a realization method of the automatic core - lining device for the precision drawing of the tube end of the metal pipe described in Embodiment 1, including: (1) When the drawing trolley moves to the origin of the die holder, the second cylinder pushes the core into the tube end, and the first cylinder acts to push the clamp to clamp the end of the pipe; (2) The drawing trolley moves forward for drawing production. After drawing to the set length dimension, it is sawed online. The first cylinder retracts, driving the clamp to open, and the second cylinder retracts, and the core follows and exits from the tube end; after automatic blanking, continuous production of the next product is carried out, and so on, to realize continuous automatic core - lining production.

[0033] In this embodiment, since there is a process - made pointed head at the tube end of the first drawn tube in each basket of materials, when the first drawn tube in each basket of materials is drawn, the first cylinder acts and the second cylinder does not act, that is, the clamp is clamped, and automatic core - lining is not realized. In addition, for products such as root - material drawing and automatic drawing of other baskets of materials that do not require automatic core - lining of the pipe, during the automatic production process, the first cylinder acts and the second cylinder does not act. The above production process is controlled by a control system.

[0034] The above are the preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements without departing from the design principle and technical solution of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A method for realizing an automatic core lining device at the tube end of precision drawing of metal tubes, characterized in that, The automatic core lining device includes two cylinders arranged on the drawing trolley: a first cylinder (1) and a second cylinder (2). The first cylinder (1) is connected to the clamp (4) through a connecting mechanism and is used to control the opening and closing of the clamp (4). The end of the telescopic rod of the second cylinder (2) is provided with a core (3) for realizing automatic core lining. The first cylinder (1) and the second cylinder (2) are arranged side by side longitudinally, and the first cylinder (1) is located above the second cylinder (2). The connecting mechanism includes a connecting panel (5) arranged at the end of the telescopic rod of the first cylinder (1), and rotating connecting arms arranged on both sides of the connecting panel (5). The rotating connecting arms are connected to the clamp (4). A first through hole (7) for the core (3) to pass through is also provided at the lower part of the connecting panel (5). The rotating connecting arm includes a main connecting arm (6) rotatably connected to the connecting panel (5), and a sub-connecting arm (12) with one end rotatably connected to the main connecting arm (6). The other end of the sub-connecting arm (12) is connected to the clamp (4). The implementation method includes: Step 1: When the drawing trolley moves to the origin of the die seat, the second cylinder pushes the core into the pipe end, and the first cylinder acts to push the clamp to clamp the pipe end. Step 2: The drawing trolley advances for drawing production. After drawing to the set length dimension, it is sawed online. The first cylinder retracts, driving the clamp to open, and the second cylinder retracts, and the core follows and exits from the pipe end. When the first drawn pipe of each basket of materials is being drawn and produced, the first cylinder acts and the second cylinder does not act.

2. The implementation method of the automatic core lining device for the tube end of precision drawn metal tubes according to claim 1, characterized in that: The core (3) is a square core rod with a taper; the edges and corners of the core (3) are rounded.

3. The implementation method of the automatic core lining device for the tube end of precision drawn metal tubes according to claim 2, characterized in that: The first cylinder (1) and the second cylinder (2) are arranged on the drawing trolley through a first mounting panel (8).

4. The implementation method of the automatic core lining device for the end of a precision drawn metal pipe according to claim 3, characterized in that: A first panel (9) is provided at the end of the first cylinder (1), and a second panel (10) is provided at the end of the second cylinder (2). The first panel (9) and the second panel (10) are vertically mounted on a second mounting panel (11).

5. The implementation method of the automatic core lining device for the end of a precision drawn metal pipe according to claim 4, characterized in that: The first panel (9) is located between the connecting panel (5) and the second panel (10), and a second through hole corresponding to the first through hole (7) is provided on the first panel (9).

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