Automatic steel pipe cutting system

Abstract

The utility model provides an automatic steel pipe cutting system which comprises an automatic cutting device and a PLC. The automatic cutting device comprises a base, a lifting mechanism is arranged on the base, a rotating mechanism is arranged on the lifting mechanism, an automatic telescopic mechanism is arranged on the rotating mechanism, the rotating mechanism comprises a supporting vertical plate and an inclined connecting plate, and an inner connecting hole and an outer connecting hole are formed in the supporting vertical plate. The inclined connecting plate is provided with a circle center positioning bolt, an upper inner connecting hole and an upper outer connecting hole, the automatic telescopic mechanism is arranged on the inclined connecting plate and comprises a linear module, and the linear module is connected with the cutting knife fixing support; and the linear module is electrically connected with the PLC. By adopting an automatic adjusting structure for the working distance between the cutting knife and the workpiece, the plasma burning stability of the cutting gun can be greatly improved, the automation level and the cutting quality of production can be improved, the labor intensity of workers can be reduced, the manual participation can be reduced, and the fault-free time of production can be greatly prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of manufacturing industry, and in particular relates to an automatic steel pipe cutting system. Background Art

[0002] At present, manual cutting guns are commonly used in the production of spiral steel pipes. Manual control and plasma flame cutting are used to achieve cutting and cutting of steel pipes during the production process. During manual operation, the operator needs to pay close attention to the distance between the plasma flame and the steel pipe, and adjust the distance within the appropriate range of 2-5mm before starting the plasma welding machine switch to achieve arc ignition of the welding machine. During the production process, the ovality error of the spiral steel pipe is controlled within 2mm. Otherwise, during the production process, the distance between the cutting gun and the steel pipe workpiece changes too much, affecting the normal burning of the cutting arc, affecting the cutting quality, and even causing arc breaking.

[0003] Manual cutting guns are used in steel pipe production. It is impossible to adjust the distance between the cutting gun and the steel pipe in time according to the existence of ovality error in the steel pipe production process, which may lead to the risk of collision between the cutting gun and the steel pipe, or the distance between the cutting gun and the steel pipe is too large, affecting the cutting quality, and may even cause the cutting gun to extinguish the arc and the cutting failure, affecting the normal production of the steel pipe. Summary of the invention

[0004] In view of this, the utility model aims to overcome the deficiencies of the above-mentioned problems in the prior art and proposes an automatic steel pipe cutting system.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] An automatic steel pipe cutting system, comprising an automatic cutting device and a PLC;

[0007] The automatic cutting device comprises a base, a lifting mechanism is arranged on the base, a hand wheel is arranged above the lifting mechanism, a locking screw is arranged on one side of the lifting mechanism, a rotating mechanism is arranged on the other side through a movable bracket, an automatic telescopic mechanism is arranged on the rotating mechanism, the rotating mechanism comprises a supporting vertical plate and an inclined connecting plate, an inner connecting hole and an outer connecting hole are arranged on the supporting vertical plate, a positioning center bolt, an upper inner connecting hole and an upper outer connecting hole are arranged on the inclined connecting plate; the inner connecting hole and the outer connecting hole are arranged correspondingly to the upper inner connecting hole and the upper outer connecting hole of the inclined connecting plate

[0008] The automatic telescopic mechanism is arranged on the inclined connecting plate, the automatic telescopic mechanism comprises a linear module, the linear module is connected to the cutting knife fixing bracket, the cutting knife fixing bracket comprises a module connecting plate, a cutting knife support frame bottom plate, a cutting knife clamp base, a cutting knife clamp upper cover, supporting ribs, and a cutting knife, the linear module is connected to the cutting knife fixing bracket via a module connecting plate, the module connecting plate is vertically connected to the cutting knife support frame bottom plate, the cutting knife clamp base is arranged on the cutting knife support frame bottom plate, the cutting knife clamp upper cover is arranged above the cutting knife clamp base, the cutting knife is arranged in the cutting knife clamp base and the cutting knife clamp upper cover, and the supporting ribs are arranged below the cutting knife support frame bottom plate;

[0009] The linear module is electrically connected to the PLC, and the PLC sends a control command to the linear module to control the motor of the linear module to work.

[0010] Furthermore, the cutting knife fixing bracket is used to achieve a fixed connection with the linear module and to provide fixed support for the cutting knife.

[0011] Furthermore, the bottom plate of the cutter support frame is also connected to a bracket, and a laser distance measuring sensor is provided on the bracket, and the laser distance measuring sensor is electrically connected to the PLC.

[0012] Furthermore, a handle is provided on the inclined connecting plate.

[0013] Furthermore, the inclined connecting plate rotates with the positioning center bolt as the center.

[0014] Compared with the prior art, the automatic steel pipe cutting system described in the utility model has the following advantages:

[0015] The utility model adopts an automatic adjustment structure for the working distance between the cutting knife and the workpiece, which can greatly improve the stability of plasma combustion of the cutting gun, improve the automation level of production and cutting quality, reduce the labor intensity of workers, reduce manual participation, and ensure that the trouble-free time of production is greatly extended. Due to the use of automatic control, the operator only needs to press the start button, and the cutting can automatically adjust the height according to the actual elliptical situation of the steel pipe, which greatly improves the ease of operation. The whole set of devices has a simple structure, is relatively easy to manufacture, and has a low cost. It can meet the automation transformation of spiral welded pipe production enterprises and improve the automation level of production enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0017] Figure 1 It is an overall schematic diagram of an automatic steel pipe cutting system of the utility model;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the automatic cutting device of the utility model;

[0019] Figure 3 It is a schematic diagram of the planar structure of the automatic cutting device of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the automatic cutting device of the utility model from another perspective;

[0021] Figure 5 This is a schematic diagram of the rotating mechanism structure of the utility model;

[0022] Figure 6 It is a structural schematic diagram of the cutting knife fixing bracket of the utility model.

[0023] Description of Reference Numerals

[0024] 1-lifting mechanism; 2-rotating mechanism; 3-automatic telescopic mechanism; 4-laser ranging sensor; 5-locking screw; 6-handwheel; 7-support vertical plate; 8-inner connecting hole; 9-tilted connecting plate; 10-positioning center bolt; 11-outer connecting hole; 12-cutter fixture base; 13-cutter support frame bottom plate; 14-cutter; 15-module connecting plate; 16-upper inner connecting hole; 17-upper outer connecting hole; 18-handle; 19-cutter fixture upper cover; 20-support rib; 21-PLC. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0026] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0028] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0029] like Figure 1 As shown, the utility model provides a steel pipe automatic cutting system, including an automatic cutting device and a PLC21;

[0030] The automatic cutting device is as follows Figure 2 , 5 As shown in , it includes a base, and a lifting mechanism 1 is provided on the base. The lifting mechanism 1 includes a screw lifting mechanism and a slide rail guide assembly arranged on the screw lifting mechanism. The handwheel 6 is used to drive the screw lifting mechanism. A locking screw 5 is provided on one side of the lifting mechanism 1. When the handwheel 6 is rotated to adjust the lifting mechanism 1 to move to a suitable position, the lifting mechanism 1 is fixed by the locking screw 5. The slide rail guide assembly is connected to the rotating mechanism through a movable bracket. The screw lifting mechanism is a T-type screw. Since it has a self-locking function, when working in a certain position, its workbench can be prevented from sliding down; by rotating the handwheel 6, it can be adjusted to a suitable cutting position. The above components are all realized by existing products.

[0031] The rotating mechanism 2 includes a supporting plate 7 and an inclined connecting plate 9. The supporting plate 7 is provided with an inner connecting hole 8 and an outer connecting hole 11. The inclined connecting plate 9 is provided with a positioning center bolt 10, an upper inner connecting hole 16 and an upper outer connecting hole 17. The inner connecting hole 8 and the outer connecting hole 11 are arranged corresponding to the upper inner connecting hole 16 and the upper outer connecting hole 17 of the inclined connecting plate 9. By positioning the center bolt 10, the cutting gun can be rotated with this as the center of the circle to adjust the cutting angles to the appropriate position. Then, the position is fixed by bolts at the upper inner connecting hole 16 and the upper outer connecting hole 17 at the appropriate positions of the two rows of inner connecting holes 8 and the outer connecting holes 11. The positions of the inner connecting holes 8 and the outer connecting holes 11 are both on the arc surface formed with the center position of the center positioning bolt 10 as the center of the circle. The supporting plate 7 and the inclined connecting plate 9 form different inclined positions, thereby controlling the connected cutting knife and the cutting steel pipe to form different inclination angles to find a suitable cutting angle. The utility model fixes the support plate and the inclined connecting plate at different angles by placing bolts in the inner connecting hole 8 and the outer connecting hole 11 and the upper inner connecting hole 16 and the upper outer connecting hole 17 of the corresponding inclined connecting plate 9, thereby adjusting the cutting gun angle.

[0032] like Figure 3-4 As shown, the rotating mechanism 2 is provided with an automatic telescopic mechanism 3, which is arranged on the inclined connecting plate 9. The automatic telescopic mechanism 3 includes a linear module, which is connected to the cutting knife fixing bracket. The linear module is telescopic through the internal lead screw nut, and moves forward and backward along the guide rail with the cutting knife fixing bracket. The cutting knife fixing bracket includes a module connecting plate 15, a cutting knife support frame bottom plate 13, a cutting knife clamp base 12, a cutting knife clamp upper cover 19, a support rib 20, and a cutting knife 14. The linear module is connected to the cutting knife fixing bracket through the module. The connecting plate 15 is connected to the cutting knife fixing bracket, the module connecting plate 15 is vertically connected to the cutting knife support frame bottom plate 13, the cutting knife clamp base 12 is arranged on the cutting knife support frame bottom plate 13, the cutting knife clamp upper cover 19 is arranged above the cutting knife clamp base 12, the cutting knife 14 is arranged in the cutting knife clamp base 12 and the cutting knife clamp upper cover 19, and the supporting rib 20 is arranged below the cutting knife support frame bottom plate 13; the cutting knife fixing bracket is used to realize the fixed connection with the linear module and the fixed support of the cutting knife. In order to realize the fixing of the cutting knife, the inner diameter of the cutting knife clamp base 12 and the cutting knife support frame bottom plate 13 adopts the same size as the cutting knife, and the height of the cutting knife clamp base 12 is subtracted by 1-3mm, and the cutting knife is stably fixed by the fixing screws and the tightening force. The cutting knife 14 can also be extended or retracted from the steel pipe position by fixing it in different positions in the fixing fixture.

[0033] In the present invention, the linear module is electrically connected to PLC21, and PLC21 sends a control command to the linear module to control the motor of the linear module to work.

[0034] The cutter support frame bottom plate 13 in the utility model is also connected to a bracket, on which a laser distance sensor 4 is provided. The laser distance sensor 4 is electrically connected to PLC21 to measure the distance between the sensor and the steel pipe, thereby indirectly representing the distance between the cutter 14 and the steel pipe.

[0035] When the utility model is working, firstly, the base is fixed on the cutting mobile trolley, so that the whole cutting system will move forward together with the mobile trolley when working, and the movement of the cutting knife relative to the spiral welded pipe is only rotational movement. Theoretically, the starting cutting position and the ending cutting position of the cutting knife are on the vertical end surface of the same axis of the steel pipe. Secondly, it is necessary to adjust the rotating mechanism to make the cutting gun and the normal direction of the steel pipe basically consistent, so as to achieve the shortest longitudinal cutting distance and realize the effective depth cutting of the effective steel pipe. Then, the automatic telescopic mechanism of the cutting knife is manually adjusted to the appropriate initial cutting distance of the steel pipe, so as to start the automatic control system, and the relative distance between the cutting gun and the steel pipe is sensed in real time through the laser ranging sensor. When the steel pipe has a large ellipticity error due to the previous processing, the PLC outputs the control quantity to the automatic telescopic mechanism of the cutting knife to realize the automatic adjustment of the telescopic length of the cutting knife, realize the stability of the working distance between the cutting knife and the steel pipe, ensure the normal combustion and stable operation of the plasma flame of the cutting knife, and effectively improve the cutting depth and cutting quality.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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. A steel pipe automatic cutting system, characterized in that: Including automatic cutting device and PLC; The automatic cutting device comprises a base, a lifting mechanism (1) is provided on the base, a hand wheel (6) is provided above the lifting mechanism (1), a locking screw (5) is provided on one side of the lifting mechanism (1), and a rotating mechanism (2) is provided on the other side through a movable bracket, and an automatic telescopic mechanism (3) is provided on the rotating mechanism (2); The rotating mechanism (2) comprises a supporting vertical plate (7) and an inclined connecting plate (9); the supporting vertical plate (7) is provided with an inner connecting hole (8) and an outer connecting hole (11); the inclined connecting plate (9) is provided with a positioning center bolt (10), an upper inner connecting hole (16) and an upper outer connecting hole (17); the inner connecting hole (8) and the outer connecting hole (11) are arranged correspondingly to the upper inner connecting hole (16) and the upper outer connecting hole (17) of the inclined connecting plate (9); The automatic telescopic mechanism (3) is arranged on the inclined connecting plate (9); the automatic telescopic mechanism (3) comprises a linear module, the linear module is connected to a cutting knife fixing bracket, the cutting knife fixing bracket comprises a module connecting plate (15), a cutting knife support frame bottom plate (13), a cutting knife clamp base (12), a cutting knife clamp upper cover (19), a supporting rib (20), and a cutting knife (14); the linear module is connected to the cutting knife fixing bracket via the module connecting plate (15); the module connecting plate (15) is vertically connected to the cutting knife support frame bottom plate (13); the cutting knife clamp base (12) is arranged on the cutting knife support frame bottom plate (13); the cutting knife clamp upper cover (19) is arranged above the cutting knife clamp base (12); the cutting knife (14) is arranged in the cutting knife clamp base (12) and the cutting knife clamp upper cover (19); and the supporting rib (20) is arranged below the cutting knife support frame bottom plate (13); The linear module is electrically connected to a PLC (21), and the PLC (21) sends a control command to the linear module to control the operation of the motor of the linear module.

2. The automatic steel pipe cutting system according to claim 1, characterized in that: The cutting knife fixing bracket is used to realize fixed connection with the linear module and fixed support for the cutting knife.

3. The automatic steel pipe cutting system according to claim 1, characterized in that: The cutter support frame bottom plate (13) is also connected to a bracket, on which a laser distance sensor (4) is provided, and the laser distance sensor (4) is electrically connected to a PLC (21).

4. The automatic steel pipe cutting system according to claim 1, characterized in that: The inclined connecting plate (9) is also provided with a handle (18).

5. The automatic steel pipe cutting system according to claim 1, characterized in that: The inclined connecting plate (9) rotates with the positioning center bolt (10) as the center.

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