Sawing machine for thick and long steel pipe

Abstract

A sawing machine for thick and long steel pipes comprises a long-strip-shaped rack, a saw disc rail is fixed to the cutting end of the rack, the axis of the saw disc rail is perpendicular to the axis of the rack, a saw disc capable of sliding along the saw disc rail is arranged on the saw disc rail, the saw disc is connected with a saw disc driving piece, a cutting rotary disc is rotationally arranged at the cutting end of the rack, and a cutting clamp is fixed to the cutting rotary disc. The cutting turntable is connected with a rotating motor. A forward clamp is arranged on the rack and fixed to the reciprocating moving piece. A plurality of groups of rotary adjusting oil cylinders are vertically arranged on the rack, a rotary supporting assembly is fixed at the piston end of each rotary adjusting oil cylinder, and the axis of a supporting wheel of the rotary supporting assembly is perpendicular to the axis of the rack. Compared with the prior art, the utility model has the technical effects that a workpiece is rotated, only one movement, namely radial feeding movement, of the saw disc is realized, the movement error is smaller, and a notch can meet the requirement.

Description

Technical Field

[0001] This utility model belongs to the field of steel pipe processing technology, specifically relating to a sawing machine for large and long steel pipes. Background Technology

[0002] Seamless steel pipes have a wide range of applications, such as in the manufacture of automobile wheel hubs and wheel rim shells. During manufacturing, the steel pipe needs to be cut into small sections before being shaped and processed.

[0003] Seamless steel pipes are relatively long (up to 6 meters), have thick walls (over 50 mm), and large diameters (over 800 mm). If a band saw is used, the cut is prone to curvature (meaning the cut is not in a single plane). If a circular saw is used, the thick walls require several rotations to complete the cut. During this process, the saw disc (positional movement, excluding its rotation) has two movements: a circumferential movement and a radial feed movement. The errors of these two movements are superimposed, making it difficult to control the position of the saw disc and resulting in substandard cuts (such as elliptical cuts).

[0004] Therefore, there are currently no suitable cutting tools for long and thick steel pipes. Utility Model Content

[0005] The technical problem to be solved by this utility model is: how to design a saw for a thick and long steel pipe.

[0006] The specific technical solution of this utility model is as follows:

[0007] A saw for long and thick steel pipes includes a long frame, a saw disc track fixed at the cutting end of the frame, the axis of the saw disc track being perpendicular to the axis of the frame, a saw disc that can slide along the saw disc track, a saw disc drive connected to the saw disc, a cutting turntable rotatably mounted at the cutting end of the frame, a cutting fixture fixed on the cutting turntable, and a rotary motor connected to the cutting turntable.

[0008] The frame is equipped with a forward clamp, which is fixed to the reciprocating moving part.

[0009] The frame is equipped with multiple sets of rotary adjustment cylinders. The rotary adjustment cylinders are set vertically, and their piston ends are fixed to the rotary support assembly. The axis of the support wheel of the rotary support assembly is perpendicular to the axis of the frame.

[0010] The frame is equipped with multiple sets of forward adjustment cylinders. The forward adjustment cylinders are vertically arranged, and the piston end of the cylinder is fixed to the forward support assembly. The axis of the support wheel of the forward support assembly is parallel to the axis of the frame.

[0011] The reciprocating moving part is threadedly connected to the screw, which is rotatably connected to the frame via bearings, and its end is connected to the forward motor.

[0012] The rotating support assembly includes a support frame and multiple support wheels. The support frame is fixed to the piston end of the rotating adjustment cylinder, the support wheels are fixed on the rotating shaft, the rotating shaft is rotatably connected to the wheel frame, and a compression spring is provided between the wheel frame and the support frame.

[0013] Two sets of saw blade rails, saw blades, and drive components are symmetrically arranged.

[0014] Compared with the prior art, the technical effect of this utility model is that the workpiece is rotated and the saw disc only has one movement - radial feed movement, which has a small movement error and the cutting can meet the requirements. Attached Figure Description

[0015] Figure 1 This is a front view of the present invention.

[0016] Figure 2 This is a top view of the present invention.

[0017] Figure 3 This is a right-side view of the present invention.

[0018] Figure 4 This is a cross-sectional schematic diagram of the support assembly. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1-3 A saw for thick and long steel pipes, comprising a long strip-shaped frame 10, and a cutting end of the frame 10 ( Figure 1 The right section is fixed with a saw blade track 62. The axis of the saw blade track 62 is perpendicular to the axis of the frame 10. A saw blade 60 that can slide along the saw blade track 62 is provided. The saw blade 60 is connected to a saw blade drive 61. The saw blade drive 61 gives the saw blade 60 reciprocating motion, such as a linear motor, electric rod or hydraulic cylinder.

[0021] The cutting end of the frame 10 is equipped with a cutting turntable 51, on which a cutting fixture 50 is fixed. The cutting turntable 51 is connected to a rotary motor 52.

[0022] The frame 10 is provided with a forward clamp 40, which is fixed on the reciprocating moving part 41.

[0023] The frame 10 is equipped with multiple sets of rotary adjustment cylinders 21. The rotary adjustment cylinders 21 are vertically arranged, and their piston ends are fixed to the rotary support assembly 20. The axis of the support wheel of the rotary support assembly 20 is perpendicular to the axis of the frame 10. Figure 2 (the vertical direction in the middle).

[0024] The frame 10 is equipped with multiple sets of forward adjustment cylinders 31. The forward adjustment cylinders 31 are vertically arranged, and the piston end of the forward support assembly 30 is fixed. The axis of the support wheel of the forward support assembly 30 is parallel to the axis of the frame 10.

[0025] like Figure 1-2 The reciprocating moving part 41 is threadedly connected to the screw 42, which is rotatably connected to the frame 10 through a bearing, and its end is connected to the forward motor 43.

[0026] During cutting, the straightness of the seamless steel pipe may be inaccurate. If the support below is rigid during its rotation, it will cause the cutting fixture to wobble, leading to a disastrous cutting operation. Therefore, the following improvements are made:

[0027] like Figure 4 The rotating support assembly 20 includes a support frame 200 and multiple support wheels 201. The support frame 200 is fixed to the piston end of the rotating adjustment cylinder 21. The support wheels 201 are fixed on the rotating shaft 202. The rotating shaft 202 is rotatably connected to the wheel frame 203. A compression spring 204 is provided between the wheel frame 203 and the support frame 200.

[0028] To increase speed, two sets of saw disc tracks 62, saw disc 60, and drive components 61 are symmetrically arranged.

[0029] Its working principle is as follows:

[0030] S1. Preparation: The piston end of the forward support assembly 31 extends, and the forward support assembly 30 is in a high position; the piston end of the rotary adjusting cylinder 21 retracts, and the rotary support assembly 20 is in a low position; the forward clamp 40 opens.

[0031] S2. Loading: Use a lifting device to lift the workpiece 90 (which is a seamless steel pipe) and place it on the support wheel of the forward support assembly 30. The lifting device then moves away.

[0032] S3, Reference Positioning: The forward clamp 40 closes to hold the workpiece 90 tightly, the forward motor 43 rotates, causing the reciprocating moving part 41 to move forward, the forward clamp 40 and the workpiece 90 move forward synchronously until the front end of the workpiece 90 reaches the standard position.

[0033] The hoisted workpiece 90 is on the forward support assembly 30 and can be easily moved.

[0034] S4. Feeding: The forward motor 43 continues to rotate, causing the reciprocating moving part 41 to move forward. The forward clamp 40 and the workpiece 90 move forward synchronously until the workpiece 90 moves forward by one cutting unit length. The cutting unit length can be manually entered in advance.

[0035] The hoisted workpiece 90 is on the forward support assembly 30 and can be easily moved.

[0036] S5. Adjustment 1: The piston end of the forward support assembly 31 retracts, and the forward support assembly 30 is in a low position; the piston end of the rotary adjustment cylinder 21 extends, and the rotary support assembly 20 is in a high position, with the workpiece 90 pressing on the rotary support assembly 20.

[0037] S6, Adjustment 2: The forward clamp 40 opens and no longer constrains the workpiece 90; the cutting clamp 50 moves to hold the workpiece 90 tightly.

[0038] S7. Cutting: Drive the rotary motor 52 to rotate the cutting fixture 50 and the workpiece 90. At the same time, the saw disc 60 moves and the radial direction of the saw disc 60 is given by the saw disc drive component 61, and the cutting is gradually completed.

[0039] The hoisted workpiece 90 is on the rotating support assembly 20 and can rotate easily.

[0040] If there is an error in the straightness of the workpiece 90, when it rotates, because the head of the workpiece (the cutting point) is held by the cutting fixture 50, the workpiece 90 rotates on a conical surface, but the head of the workpiece is at the tip of the cone, and the other positions are adjusted by the extension and retraction of the compression spring 204. Therefore, the position of the cutting point will not shift and will not affect the cutting operation.

[0041] S8. Adjustment 3: After cutting is completed, the cutting fixture 50 is opened and the workpiece 90 is no longer constrained;

[0042] S9. Retraction: The forward motor 43 rotates in the opposite direction, causing the reciprocating moving part 41 to retract by one cutting unit length. The forward clamp 40 also retracts by one cutting unit length. After reaching the position, the forward clamp 40 moves to hold the workpiece 90 tightly.

[0043] S10. Continue with steps S4 to S9 until all cutting is complete.

[0044] For other details, please refer to the existing technology.

[0045] The above description is only a preferred embodiment of the present utility model. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present utility model, and these should also be considered within the protection scope of the present utility model.

Claims

1. A sawing machine for thick and long steel pipes, comprising a long strip-shaped frame (10), a saw disc track (62) fixed at the cutting end of the frame (10), the axis of the saw disc track (62) being perpendicular to the axis of the frame (10), a saw disc (60) capable of sliding along the saw disc track (62), and a saw disc drive (61) connected to the saw disc track (62), characterized in that: The cutting end of the frame (10) is provided with a cutting turntable (51), and a cutting fixture (50) is fixed on the cutting turntable (51). The cutting turntable (51) is connected to a rotary motor (52). A forward clamp (40) is provided on the frame (10), and the forward clamp (40) is fixed on the reciprocating moving part (41); The frame (10) is provided with multiple sets of rotary adjustment cylinders (21). The rotary adjustment cylinders (21) are vertically arranged, and their piston ends are fixed to the rotary support assembly (20). The axis of the support wheel of the rotary support assembly (20) is perpendicular to the axis of the frame (10). The frame (10) is provided with multiple sets of forward adjustment cylinders (31). The forward adjustment cylinders (31) are vertically arranged, and the piston end of the cylinder is fixed to the forward support assembly (30). The axis of the support wheel of the forward support assembly (30) is parallel to the axis of the frame (10).

2. The sawing machine for thick and long steel pipes as described in claim 1, characterized in that: The reciprocating moving part (41) is threadedly connected to the screw (42), which is rotatably connected to the frame (10) through a bearing, and its end is connected to the forward motor (43).

3. The sawing machine for thick and long steel pipes as described in claim 2, characterized in that: The rotating support assembly (20) includes a support frame (200) and multiple support wheels (201). The support frame (200) is fixed to the piston end of the rotating adjustment cylinder (21), and the support wheels (201) are fixed on the rotating shaft (202). The rotating shaft (202) is rotatably connected to the wheel frame (203), and a compression spring (204) is provided between the wheel frame (203) and the support frame (200).

4. The sawing machine for thick and long steel pipes as described in claim 3, characterized in that: Two sets of saw blade track (62), saw blade (60), and drive unit (61) are symmetrically provided.

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