Metal pipe stretching and expanding machine

Abstract

The utility model discloses a metal pipe stretching and expanding machine, which belongs to the field of expanding machines and is characterized in that a pipeline is placed on a placing table and penetrates through a clamp to be inserted into a heating ring; an expanding head is installed on the end face of the connecting table and right faces the heating ring, the clamp and the placing table, adding frames are installed at the upper end and the lower end of the connecting table, limiting frames are arranged at the outer ends of the adding frames, limiting heads are installed in sliding grooves in the end faces of the limiting frames, the limiting heads are fixed to the limiting frames through fastening nuts, and the limiting heads slide up and down along the sliding grooves of the limiting frames; and excessive diameter expansion of the pipeline is limited through the limiting head. And the expanding head directly expands the heated metal pipe, so that the expanding effect is ensured to meet the requirement. And due to the coaxial design with related parts, the machining precision is improved, and errors are reduced. The limiting head prevents excessive expanding through the limiting frame, the shape of the limiting head is the same as that of the expanding head so that machining synchronism and consistency can be guaranteed, and pipe deformation or damage is avoided. The limiting head is fixed through the fastening nut, and stability and reliability are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of expanding machine, especially relates to a metal pipe stretching and expanding machine. BACKGROUND

[0002] The metal pipe stretching and expanding machine is a device for metal pipe processing, mainly used for processing metal pipes through stretching and expanding to achieve the required size and shape. The device is usually composed of a stretching unit, an expanding unit, a control system, etc. During operation, the metal pipe is fixed on the stretching unit, and the pipe length is increased through the stretching action of the stretching unit. Then, the expanding unit expands the pipe radially to meet the specific size requirements. The metal pipe stretching and expanding machine is widely used in petroleum, chemical industry, shipbuilding, aerospace, etc. for producing various specifications of seamless steel pipes and welded steel pipes.

[0003] In the actual processing of metal pipes, although the expanding structure of the metal pipe stretching and expanding machine can effectively expand the pipe end, it may cause excessive expansion and deformation of the pipe end due to the lack of effective limiting mechanism. Such excessive expansion not only has a negative impact on the size and shape accuracy of the pipe, but also may reduce the mechanical properties of the pipe, such as reducing its load-carrying capacity and pressure resistance. In addition, excessive deformation may cause stress concentration in the material, increase the fatigue risk of the pipe during use, and even cause early failure. SUMMARY

[0004] The main purpose of the utility model is to provide a metal pipe stretching and expanding machine, which can effectively solve the problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows:

[0006] A metal pipe stretching and expanding machine, comprising a support frame, a driving device, a connecting table, a transmission device and a heating coil, the driving device is installed on the support frame, and the driving device is connected with the connecting table through the transmission device, and the connecting table is connected on the support frame;

[0007] The lower end of the support frame is provided with a sliding table, and the sliding table is connected with a base through a sliding rail, the upper end of the sliding table is provided with a heating coil, the upper end of the base is provided with a hydraulic cylinder for pushing the sliding table, electric push rods are installed on both sides of the upper end of the base, and the extension end of the electric push rod is connected with a clamp, a placing table is arranged on the base, and a pipeline is placed on the placing table, the pipeline passes through the clamp and inserts into the heating coil;

[0008] The end surface of the connecting table is provided with a diameter expansion head, the diameter expansion head is opposite to the heating ring, the clamp and the placing table, the upper and lower ends of the connecting table are provided with an additional frame, the outer end of the additional frame is provided with a limiting frame, the end surface of the limiting frame is provided with a limiting head in a sliding groove, the limiting head is fixed on the limiting frame through a fastening nut, the limiting head slides up and down along the sliding groove of the limiting frame, and the pipe is prevented from excessive diameter expansion through the limiting head.

[0009] As a further preferred scheme of the present application, the slide rail and the hydraulic cylinder are fixed on the base through bolts, the slide table is matched with the slide rail, the supporting frame is fixed on the slide table through bolts, and the placing table is fixed on the base through bolts.

[0010] As a further preferred scheme of the present application, the lower end of the electric push rod is provided with a supporting table, the supporting table is fixed on the base through bolts, the clamp is fixed on the telescopic end of the electric push rod through bolts, and the inner wall of the clamp is provided with a buffer anti-skid pad.

[0011] As a further preferred scheme of the present application, the pipe, the positioning center of the clamp, the heating ring and the diameter expansion head are coaxially designed.

[0012] As a further preferred scheme of the present application, the additional frame is connected with the connecting table through bolts, the additional frame is designed perpendicularly to the limiting frame, the limiting frame is designed integrally with the additional frame, and the two ends of the limiting frame are provided with rubber strips.

[0013] As a further preferred scheme of the present application, the tail of the limiting head is provided with a screw rod, the screw rod passes through the sliding groove of the limiting frame and is connected with the fastening nut, the end surface of the fastening nut is adhesively connected with an anti-skid pad, and the limiting head and the diameter expansion head are of the same shape.

[0014] Compared with the prior art, the present application has the following beneficial effects:

[0015] The diameter expansion head is responsible for directly expanding the heated metal pipe, and the accurate machining capacity ensures that the pipe expansion effect meets the design requirements. Meanwhile, the coaxial design of the diameter expansion head and the pipe, the clamp, the heating ring and other components further improves the machining precision and reduces the error.

[0016] The limiting head is limited by the limiting frame, effectively preventing the metal pipe from being excessively expanded during the diameter expansion process. The limiting head and the diameter expansion head are of the same shape, ensuring the synchronization and consistency during the machining process, thereby avoiding the deformation or damage of the pipe caused by uneven expansion. In addition, the limiting head is fixed on the limiting frame through the fastening nut, ensuring the stability and reliability thereof.

[0017] The limiting frame is a key component connecting the mounting rack and the limiting head, which not only provides a sliding track for the limiting head, but also reduces friction and noise through the rubber strips at both ends. This design not only prolongs the service life of the equipment, but also improves the comfort and safety during the processing. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a top view of the overall structure of the utility model;

[0020] Figure 3 It is a side view of the overall structure of the utility model;

[0021] Figure 4 It is a display diagram of the connecting table, the expanding head, the transmission device, the limiting head and the mounting rack of the utility model;

[0022] Figure 5 It is a front view of the connecting table, the expanding head, the transmission device, the limiting head and the mounting rack of the utility model.

[0023] In the figure: 1, base; 2, slide rail; 3, hydraulic cylinder; 4, sliding table; 5, support frame; 6, driving device; 7, connecting table; 8, transmission device; 9, expanding head; 10, mounting rack; 11, limiting frame; 12, limiting head; 13, fastening nut; 14, heating ring; 15, electric push rod; 16, clamp; 17, placing table; 18, pipeline. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the following will further describe the utility model in combination with specific implementation manners.

[0025] As shown in Figure 1 - Figure 5 A metal pipe stretching and expanding machine, the design aims to realize accurate stretching and expanding treatment of metal pipes. The equipment is mainly composed of a support frame 5, a driving device 6, a connecting table 7, a transmission device 8, a heating ring 14, a sliding table 4, a base 1, a hydraulic cylinder 3, an electric push rod 15, a clamp 16, a placing table 17, a pipeline 18, a mounting rack 10, a limiting frame 11, a limiting head 12, a fastening nut 13 and the like.

[0026] The support frame 5 is the basic structure of the entire equipment, and the driving device 6 is installed on the upper end thereof. The driving device 6 is connected with the connecting table 7 through the transmission device 8, and the connecting table 7 is connected with the support frame 5, forming a stable transmission system. The lower end of the support frame 5 is provided with the sliding table 4, and the sliding table 4 is connected with the base 1 through the slide rail 2. The upper end of the sliding table 4 is provided with the heating ring 14 for heating treatment of the metal pipe.

[0027] The upper end of the base 1 is provided with a hydraulic cylinder 3 for pushing the sliding table 4 to realize the stretching action of the metal pipe. The upper end of the base 1 is also provided with an electric push rod 15 on both sides, and the telescopic end of the electric push rod 15 is connected with a clamp 16 for fixing the metal pipe to ensure its stability during processing. The base 1 is also provided with a placing table 17 for placing the metal pipe to be processed, and the pipe 18 on the placing table 17 passes through the clamp 16 and is inserted into the heating ring 14.

[0028] The end face of the connecting table 7 is provided with a diameter expanding head 9 opposite the heating ring 14, the clamp 16 and the placing table 17 for expanding the heated metal pipe. The upper and lower ends of the connecting table 7 are provided with an additional frame 10, and the outer end of the additional frame 10 is provided with a limiting frame 11. The end face of the limiting frame 11 is provided with a limiting head 12 which is fixed on the limiting frame 11 by a fastening nut 13. The limiting head 12 slides up and down along the sliding groove of the limiting frame 11, and the limiting head 12 limits the excessive expansion of the pipe 18.

[0029] The sliding rail 2 and the hydraulic cylinder 3 are fixed on the base 1 by bolts, the sliding table 4 is matched with the sliding rail 2, the supporting frame 5 is fixed on the sliding table 4 by bolts, and the placing table 17 is fixed on the base 1 by bolts. The lower end of the electric push rod 15 is provided with a supporting table which is fixed on the base 1 by bolts, and the clamp 16 is fixed on the telescopic end of the electric push rod 15 by bolts. The inner wall of the clamp 16 is provided with a buffer anti-skid pad.

[0030] The pipe 18, the positioning center of the clamp 16, the heating ring 14 and the diameter expanding head 9 are coaxially designed to ensure the processing accuracy. The additional frame 10 is connected with the connecting table 7 by bolts, the additional frame 10 is designed perpendicularly to the limiting frame 11, and the limiting frame 11 is designed integrally with the additional frame 10. Rubber strips are provided at both ends of the limiting frame 11 to reduce friction and noise.

[0031] The tail of the limiting head 12 is provided with a screw which passes through the sliding groove of the limiting frame 11 and is connected with the fastening nut 13. The end face of the fastening nut 13 is adhesively connected with an anti-skid pad. The limiting head 12 and the diameter expanding head 9 are of the same shape to ensure the synchronization and consistency during processing.

[0032] The use process is as follows: the metal pipe to be processed is placed on the placing table 17. Adjust the electric push rod 15 to make the clamp 16 clamp the metal pipe to ensure its stability during processing. Start the driving device 6 to transmit power to the connecting table 7 through the transmission device 8. Adjust the heating ring 14 to face the metal pipe, and start the heating system to heat the metal pipe. When the metal pipe reaches the required temperature, start the hydraulic cylinder 3 to push the sliding table 4 to realize the stretching action of the metal pipe.

[0033] At the same time, the electric push rod 15 telescopic end head clamp 16 fixed metal pipe, ensure its stability in the process of stretching. After stretching, the connecting table 7 end face of the expansion head 9 begins to the heated metal pipe expansion processing. The limit frame 11 and limit head 12 on the mounting frame 10 limit the pipe 18 overexpansion, ensure the machining precision. In the processing, the limit head 12 and the expansion head 9 are the same shape, ensure the synchronization and consistency in the processing. After processing, the drive device 6, heating system and hydraulic system are closed, and the processed metal pipe is taken out.

[0034] The standard parts used in the utility model can be purchased from the market, and the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolt, rivet and welding in the prior art, the machinery, parts and equipment adopt the conventional type in the prior art, and the electric melting connection adopts the conventional connection mode in the prior art, which will not be described in detail here.

[0035] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A metal pipe stretch-drawing machine comprising a support frame (5), a driving device (6), a connecting table (7), a transmission device (8) and a heating ring (14), wherein the driving device (6) is installed on the support frame (5), the driving device (6) is connected with the connecting table (7) through the transmission device (8), and the connecting table (7) is connected on the support frame (5), characterized in that: The lower end of the support frame (5) is provided with a sliding table (4), and the sliding table (4) is connected with a base (1) through a sliding rail (2), the upper end of the sliding table (4) is provided with a heating ring (14), the upper end of the base (1) is provided with a hydraulic cylinder (3) for pushing the sliding table (4), the upper end of the base (1) is provided with an electric push rod (15) on both sides, and the telescopic end of the electric push rod (15) is connected with a clamp (16), the base (1) is provided with a placing table (17), and the placing table (17) is provided with a pipeline (18), and the pipeline (18) passes through the clamp (16) and inserts into the heating ring (14). The end face of the connecting table (7) is provided with a diameter expansion head (9), the diameter expansion head (9) is opposite to the heating ring (14), the clamp (16) and the placing table (17), the upper and lower ends of the connecting table (7) are provided with an additional frame (10), and the outer end of the additional frame (10) is provided with a limiting frame (11), the end face of the limiting frame (11) is provided with a limiting head (12) in the sliding groove, the limiting head (12) is fixed on the limiting frame (11) through a fastening nut (13), the limiting head (12) slides up and down along the sliding groove of the limiting frame (11), and the pipeline (18) is limited from excessive diameter expansion through the limiting head (12).

2. A metal pipe stretch-ironing machine according to claim 1, characterized in that: The sliding rail (2) and the hydraulic cylinder (3) are fixed on the base (1) through bolts, the sliding table (4) is matched with the sliding rail (2), the support frame (5) is fixed on the sliding table (4) through bolts, and the placing table (17) is fixed on the base (1) through bolts.

3. A metal pipe stretch-ironing machine according to claim 2, characterized in that: The lower end of the electric push rod (15) is provided with a support table, which is fixed on the base (1) through bolts, the clamp (16) is fixed on the telescopic end of the electric push rod (15) through bolts, and the inner wall of the clamp (16) is provided with a buffer anti-skid pad.

4. A metal pipe stretch-ironing machine according to claim 3, characterized in that: The pipeline (18), the positioning center of the clamp (16), the heating ring (14) and the diameter expansion head (9) are coaxially designed.

5. A metal tube stretch-ironing machine according to claim 4, characterized in that: The additional frame (10) is connected with the connecting table (7) through bolts, the additional frame (10) is designed perpendicularly to the limiting frame (11), the limiting frame (11) is designed integrally with the additional frame (10), and the limiting frame (11) is provided with rubber strips at both ends.

6. A metal tube stretch-ironing machine according to claim 5, characterized in that: The tail of the limiting head (12) is provided with a screw rod, the screw rod passes through the sliding groove of the limiting frame (11) and is connected with the fastening nut (13), the end face of the fastening nut (13) is adhesively connected with an anti-skid pad, and the limiting head (12) and the diameter expansion head (9) are the same in shape.

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