Servo drive multi-shaft linkage mechanism for machining outer diameter of seamless steel pipe
Through the servo-driven multi-axis linkage mechanism, the steel billet is realized in the single-chopping alignment of the outer diameter of the seamless steel pipe, solving the problems of difficulty in biting the billet and uneven wall thickness in the prior art, protecting the rolling roll and improving the processing efficiency.
Patent Information
- Application Number
- CN202510489918.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-18
- Publication Date
- 2025-05-30
AI Technical Summary
In the processing of outer diameter of seamless steel pipes, the billet is prone to damage the peripheral surface of the roll when biting in one piece, and it is difficult and misaligned, resulting in uneven wall thickness of seamless steel pipes.
The multi-axis linkage mechanism of servo drive is adopted to achieve centering and clamping of the steel billet by clamping and rotating the roll, and the servo drive is used to achieve centering clamping of the steel billet to avoid collision between the end surface of the steel billet and the peripheral surface of the roll, thereby protecting the roll and ensuring the uniformity of the steel pipe wall thickness.
It effectively avoids damage to the circumference of the roll, realizes the alignment of the billet during one bite, ensures the uniformity of the wall thickness of the seamless steel pipe, and improves processing efficiency and product quality.
Smart Images
Figure CN120055053A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of seamless steel pipe outer diameter processing, and specifically to a servo-driven multi-axis linkage mechanism for seamless steel pipe outer diameter processing. Background Art
[0002] The surface of seamless steel pipes has no welds, and they can have excellent bending torque strength even with a relatively light weight. They are widely used in various industries, such as conveying pipelines in the energy industry, drive shafts in the automotive industry, and scaffolding in the construction industry.
[0003] The main parameters in seamless steel pipe processing are the outer diameter and wall thickness. Piercing is the first process for outer diameter processing, and its purpose is to obtain a seamless steel pipe with basic contour dimensions through the rolling of the outer ring of the billet by rolls and the stamping of the inside of the billet by a mandrel. A piercing mill is a commonly used device for the piercing process, which usually has a pusher, a conveyor table, rolls, and a mandrel trolley structure. In traditional piercing mills, the feeding force of the billet is provided by the pusher, and the axis of the roll is parallel to the axis of the billet, and there is a gap between the roll and the billet. However, simply pushing the billet on a conveyor table with a fixed height by the pusher cannot accurately position the billet to be centered between multiple rolls. Therefore, the wall thickness uniformity of the produced seamless steel pipes is poor. To solve the above problems, some solutions have been proposed in the prior art. For example, the axis of the roll is no longer parallel to the axis of the billet, but maintains a skew-intersecting relationship. Thus, while multiple rolls rotate in the same direction, they can also drive the billet to feed, so that there is no need for the pusher to provide the feeding force, and the outer diameter at the end of the roll is reduced inward, so that the billet gradually contacts the roll and the part of the billet extending into the end of the roll remains centered.
[0004] In the prior art, through the inclined arrangement of the rolls, the billet is centered during the first bite (when the billet contacts the roll is the first bite, and when the mandrel contacts the billet is the second bite) to improve the wall thickness uniformity of the seamless steel pipe. However, in actual production, this improvement effect is very limited, especially for large-mass billets lacking pretreatment. The reasons are as follows: 1) After the billet rolls down the slope to the conveyor table, the pusher pushes it to contact the peripheral surface of the roll to complete the first bite. However, the billet has a large mass, and correspondingly, a large inertia. During the process from motion to rest, it will exchange momentum with the roll. However, the position of the roll is fixed, and the peripheral surface in contact with the billet will be damaged. 2) As unprocessed blank parts, the deviation range of the outer diameters between billets is large. When operating at the same height on the feeding table, it will cause the billet to be misaligned during the first bite, and further, in subsequent processing, it will not only cause continuous damage to the surface of the roll, but also make the wall thickness of the formed seamless steel pipe uneven.
[0005] Therefore, a servo-driven multi-axis linkage mechanism for seamless steel pipe outer diameter processing is proposed. Summary of the Invention
[0006] The purpose of the present invention is to provide a servo-driven multi-axis linkage mechanism for processing the outer diameter of seamless steel pipes, which solves the problems of damaging the circumferential surface of the roll, difficult biting and misalignment during the first bite of the billet. By first clamping the billet with the roll, then rotating the roll, and with the aid of servo drive, the billet is centered by the clamping of the roll by the roll, achieving the purpose of stable biting of the billet, avoiding the impact of the end face of the billet on the circumferential surface of the roll, thereby avoiding the damage of the circumferential surface of the roll, and ensuring the centering of the billet during the first bite.
[0007] To achieve the above object, the present invention provides the following technical solutions:
[0008] A servo-driven multi-axis linkage mechanism for processing the outer diameter of seamless steel pipes, used for piercing billets, includes a pusher, a conveying table and a mandrel trolley, and also includes a receiving plate, a lifting module, a chuck, rolls and a clamping module. The receiving plate is slidably connected to the conveying table. The lifting module is arranged between the receiving plate and the conveying table. The chuck is arranged on the right side of the conveying table. A plurality of the rolls are circumferentially arrayed on the right end face of the chuck. The clamping module is installed inside the chuck;
[0009] The billet pushed by the pusher enters between a plurality of rolls. The plurality of rolls synchronously slide radially along the chuck under the action of the clamping module. The receiving plate is vertically adjusted by the lifting module to center the billet.
[0010] Preferably, the clamping module includes a clamping plate, an input shaft and a clamping motor. The clamping plate is rotatably connected inside the chuck. The circumferential surface of the clamping plate is provided with a bevel gear structure, and a flat thread is provided on one end face of the clamping plate. One end of the input shaft meshes with the bevel gear structure of the clamping plate. The output shaft of the clamping motor is connected to the other end of the input shaft. A plurality of the rolls are all meshed with the flat thread;
[0011] In the above solution, a plurality of rolls synchronously contract and expand under the rotation action of the flat thread to complete the first bite by means of clamping, rather than making the end face of the billet in hard contact with the circumferential surface of the roll by a pusher as in the prior art, thereby avoiding the collision between the end face of the billet and the roll during the first bite, and thus avoiding the damage of the circumferential surface of the roll.
[0012] Preferably, the lifting module includes a lifting motor and a lead screw. The lifting motor and the lead screw are both installed on the conveying table, and the output shaft of the lifting motor is connected to one end of the lead screw. The lead screw is inserted into the receiving plate and meshes with it;
[0013] In the above solution, the vertical position of the receiving plate is adjusted by the lifting module, thereby ensuring the centering of the billet during the clamping process to avoid damaging the roll and making the wall thickness of the seamless steel pipe uneven.
[0014] Preferably, the rolling mill roll includes a roll frame, a roll body, a roll motor, and a roll drive. The roll frame is slidably connected to the chuck and meshed with a planar thread. The roll body is rotatably connected to the roll frame. The roll motor is arranged on one side of the roll frame, and the roll drive is installed between the roll motor and the roll body.
[0015] Preferably, both the clamping motor and the lifting motor are servo motors. An annular sensor is installed on the outer ring of the roll body, and the annular sensor is located at the left end of the roll body.
[0016] In the above solution, automatic control is achieved through the servo motor and the annular sensor. On the one hand, the annular sensor is used to detect the centering condition of the billet. On the other hand, through the cooperation of the clamping motor and the annular sensor, the displacement data of the roll body is obtained, and this displacement data is synchronized with the lifting motor to achieve synchronous adjustment of the height of the receiving plate, thereby realizing the centering of the billet.
[0017] Preferably, a chute is provided on the right end face of the chuck. The number of chutes is equal to the number of roll frames. One of the chutes is arranged vertically, and the other chutes are symmetrically arranged with respect to the vertical chute. The roll frame is slidably connected inside the chute.
[0018] Preferably, a clamping block is installed on the receiving plate, and the clamping block is located between the conveying table and the receiving plate.
[0019] In the above solution, in the stop and material receiving states of the receiving plate, the clamping block abuts against the conveying table to reduce the pressure time and impact strength on the lifting module (lead screw and lifting motor), thereby weakening the damage to the lead screw and the lifting motor and making the perforating machine operate more stably.
[0020] Preferably, the clamping block is detachably installed on the receiving plate, and there are multiple installation positions for the clamping block in the up and down directions of the receiving plate.
[0021] In the above solution, by installing the clamping block at different heights on the receiving plate, the up and down stroke of the receiving plate is adjusted to be applicable to the production of billets with different outer diameter specifications. Thus, not only the energy consumption of the lifting motor is reduced, but also the impact of the falling billet on the receiving plate is weakened to further protect the clamping block and the lifting module.
[0022] Preferably, the upper surface of the receiving plate is set as an arc structure, and the radian of the arc structure of the receiving plate is smaller than the radian of the billet with the largest diameter.
[0023] In the above solution, the bottom of the billet contacts the feeding table to reduce the contact area between the billet and the feeding table, thereby reducing the feeding force required for the billet during the first bite and reducing the power consumption of the roll motor. Moreover, the arc structure effectively ensures the alignment of the billet in the front and back directions.
[0024] Preferably, the outer diameter of the right part of the roller body gradually decreases from left to right, and the outer diameter of the left part of the roller body is consistent;
[0025] In the above solution, the roller body uses the outer ring of its left part to complete the first and second bites of the billet, and uses the outer ring of its right part to complete the expansion of the outer diameter of the billet. Compared with the roller body in the prior art, this solution removes the conical structure provided for the first bite, thereby reducing the processing difficulty and cost of the roller body.
[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0027] 1. In the present invention, a plurality of roller bodies that synchronously slide radially along the chuck clamp the billet during the first bite, thereby avoiding the impact of the billet on the roller body, effectively protecting the roller body; and a receiving plate that slides up and down is provided on the conveying table to adjust the vertical position of the billet, thereby completing the centering between the plurality of roller bodies.
[0028] 2. In the present invention, an annular sensor is provided on the roller body to real-time monitor the centering situation of the billet between the plurality of roller bodies through the measured values of the plurality of sensors, and the clamping motor that controls the sliding of the roller body and the lifting motor that controls the sliding of the receiving plate are both servo motors. Through the data conversion between the annular sensor, the clamping motor and the servo motor, the automatic control of the position of the billet by the lifting module can be realized while the roller body clamps the billet, so as to ensure the centering of the billet, thereby protecting the roller body and making the wall thickness of the seamless steel pipe uniform.
[0029] 3. In the present invention, the upper surface of the receiving plate is set as an arc-shaped structure with an arc smaller than that of the billet with the largest diameter, which not only reduces the friction between the billet and the receiving plate, thereby reducing the demand for the feeding force provided to the roller body, reducing the energy consumption of the roller motor, but also effectively ensures the centering of the billet in the front and back directions. And through the multi-position adjustment of the clamping block, in addition to protecting the lifting module, it can also shorten the falling stroke of the billet, so that the billet quickly stops on the receiving plate, thereby improving the piercing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 is an overall isometric structural schematic diagram of the present invention;
[0031] Figure 2 is an overall front view structural schematic diagram of the present invention;
[0032] Figure 3 is an internal structural schematic diagram of the chuck of the present invention;
[0033] Figure 4 is an overall right view structural schematic diagram of the present invention;
[0034] Figure 5 is a schematic diagram of the pushing state of the present invention;
[0035] Figure 6 Schematic diagram of the state where the lower roller body of the present invention contacts the billet;
[0036] Figure 7 Schematic diagram of the centering and clamping state of the billet of the present invention;
[0037] Figure 8 Schematic diagram of the seamless steel pipe forming state of the present invention.
[0038] In the figure: 1, pusher; 2, conveying table; 3, ejector trolley; 4, receiving plate; 41, clamping block; 5, lifting module; 51, lifting motor; 52, lead screw; 6, chuck; 61, chute; 7, rolling mill; 71, roll stand; 72, roller body; 721, annular sensor; 73, roll motor; 74, roll drive; 8, clamping module; 81, clamping plate; 811, planar thread; 82, input shaft; 83, clamping motor; 9, billet. Specific embodiments
[0039] 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.
[0040] Please refer to Figures 1 to 8 , the present invention provides a servo-driven multi-axis linkage mechanism for processing the outer diameter of seamless steel pipes, and the technical solutions are as follows:
[0041] A servo-driven multi-axis linkage mechanism for processing the outer diameter of seamless steel pipes, which is used for piercing the billet 9, includes a pusher 1, a conveying table 2, an ejector trolley 3, a receiving plate 4, a lifting module 5, a chuck 6, a rolling mill 7 and a clamping module 8. The pusher 1 is arranged on the right side of the feeding table and is used to push the billet 9 between multiple rolling mills 7. The axis of the push rod of the pusher 1 should coincide with the axis of the chuck 6, and the diameter should not be too large or too small. If it is too large, it will interfere with the upward moving receiving plate 4, and if it is too small, the action range will be limited and it is not suitable for processing the outer diameters of seamless steel pipes of multiple specifications; the ejector trolley 3 is located at the right end. While the heated billet 9 is clamped by the rolling mill 7, it rotates and feeds to the right together with the rolling mill 7. Under the action of the top head of the ejector trolley 3, a quasi-stamping deformation (i.e., secondary biting-in) occurs. After the piercing of the entire billet 9 is completed, the ejector trolley 3 moves to the right to unload the material, and then the above process is repeated; the receiving plate 4 is slidably connected to the conveying table 2, the lifting module 5 is arranged between the receiving plate 4 and the conveying table 2, the chuck 6 is arranged on the right side of the conveying table 2, three rolling mills 7 are circumferentially arranged on the right end face of the chuck 6, and the clamping module 8 is installed inside the chuck 6;
[0042] The billet 9 pushed by the pusher 1 enters between the three rollers 7 through the receiving plate 4. The three rollers 7 are synchronously slid along the radial direction of the chuck 6 under the action of the clamping module 8, and the receiving plate 4 is vertically adjusted by the lifting module 5 to center the billet 9.
[0043] As an implementation manner of the present invention, referring to Figure 1 , the clamping module 8 includes a clamping plate 81, an input shaft 82 and a clamping motor 83. The clamping plate 81 is rotatably connected inside the chuck 6. The circumferential surface of the clamping plate 81 is provided with a bevel gear structure. A flat thread 811 is provided on one end surface of the clamping plate 81. One end of the input shaft 82 meshes with the bevel gear structure of the clamping plate 81, and the output shaft of the clamping motor 83 is connected to the other end of the input shaft 82. All three rollers 7 are meshed with the flat thread 811; a bearing is installed between the clamping plate 81 and the chuck 6 to achieve the rotational connection between the two; the clamping motor 83 can rotate bidirectionally. When rotating forward, the clamping plate 81 is driven to rotate forward through the input shaft 82, so that the three rollers 7 synchronously contract inward along the radial direction of the chuck 6 through the forward rotation of the flat thread 811 on the end surface of the clamping plate 81; similarly, when the clamping motor 83 rotates reversely, the three rollers 7 synchronously expand outward along the radial direction of the chuck 6.
[0044] As an implementation manner of the present invention, referring to Figure 2 , the lifting module 5 includes a lifting motor 51 and a lead screw 52. The lifting motor 51 and the lead screw 52 are both installed on the conveying table 2, and the output shaft of the lifting motor 51 is connected to one end of the lead screw 52. The lead screw 52 is inserted into the receiving plate 4 and meshes with it; a block 41 is installed on the receiving plate 4, and the block 41 is located between the conveying table 2 and the receiving plate 4;
[0045] When the lifting motor 51 rotates forward, the feeding plate rises through the meshing of the lead screw 52 and the receiving plate 4; similarly, when the lifting motor 51 rotates reversely, the receiving plate 4 is driven to descend. Before the equipment stops or before the receiving plate 4 receives the material, the lifting motor 51 rotates reversely until the block 41 abuts against the upper surface of the conveying table 2. During this process, the block 41 can partially or completely share the pressure of the receiving plate 4 and the billet 9 on the lead screw 52 and the lifting motor 51; under the control of the lifting module 5, the lifting and lowering of the receiving plate 4 is directly related to the clamping state of the rollers 7 on the billet 9, specifically as follows:
[0046] 1) Pushing state (refer to Figure 5 ); at this time, the clamping motor 83 rotates reversely to synchronously expand the three rollers 7, and the lifting motor 51 rotates reversely to make the block 41 abut against the conveying table 2. Then the pusher 1 pushes the billet 9 on the receiving plate 4 to move to the right until the right end of the billet 9 enters the area between the rollers 7;
[0047] 2) Contact state (refer to Figure 6) At this time, the clamping motor 83 rotates forward, causing the three rollers 7 to retract synchronously until the lower roller 7 contacts the surface of the billet 9. Subsequently, the lifting motor 51 starts and rotates forward, cooperating with the clamping motor 83 to achieve the synchronous upward movement of the billet 9 and the lower roller 7;
[0048] 3) Centering and clamping state (refer to Figure 7 ); Immediately following the above state, when the billet 9 contacts the upper roller 7, the clamping motor 83 and the lifting motor 51 stop rotating forward and maintain Figure 7 state;
[0049] 4) Forming state (refer to Figure 8 ); After achieving the centering and clamping state, the three roller motors 73 start to rotate in the same direction. While rolling the outer surface of the billet 9, they provide a feeding force to the right for the billet 9, so as to complete the piercing with the assistance of the ejector trolley 3 and form the prototype of the seamless steel pipe.
[0050] As an implementation manner of the present invention, refer to Figure 2 , the clamping block 41 is detachably installed on the receiving plate 4, and there are multiple installation positions for the clamping block 41 in the up and down directions of the receiving plate 4; the upper surface of the receiving plate 4 is set as an arc structure, and the radian of the arc structure of the receiving plate 4 is smaller than the radian of the billet 9 with the largest diameter;
[0051] The circumferential surface of the clamping block 41 is evenly arrayed with through holes, and at the installation positions of the clamping block 41 on the receiving plate 4, the same number of threaded holes are circumferentially arrayed, and then a circle of threaded holes is linearly arrayed to form multiple installation positions for the clamping block 41 in the up and down directions of the receiving plate 4. During installation, bolts are used for fixation; the arc structure of the receiving plate 4 can ensure the alignment of the billet 9 in the front and back directions with the area between the three rollers 7, but attention should also be paid to the feeding height of the billet 9 above the receiving plate 4 to reduce the kinetic energy of the billet 9 after it falls onto the receiving plate 4, so that the billet 9 quickly stops, thereby improving the efficiency of the outer diameter processing of the seamless steel pipe.
[0052] As an implementation manner of the present invention, refer to Figure 3 , the roller 7 includes a roller frame 71, a roller body 72, a roller motor 73, and a roller drive 74. The roller frame 71 is slidably connected to the chuck 6, and the roller frame 71 meshes with the planar thread 811. The roller body 72 is rotatably connected to the roller frame 71. The roller motor 73 is arranged on one side of the roller frame 71. The roller drive 74 is installed between the roller motor 73 and the roller body 72, and the roller drive 74 uses a universal coupling; the outer diameter of the right part of the roller body 72 gradually decreases from left to right, and the outer diameter of the left part of the roller body 72 is consistent;
[0053] The distances from the points on the planar thread 811 to the midpoint of the clamping plate 81 are different. Therefore, the structure of each roller frame 71 meshing with the planar thread 811 needs to be set separately to make the billet 9 clamped by the three rollers 72 in the center position. During processing, the roller 72 completes the first bite of the billet 9 with the help of the flat outer ring on the left, and with the rightward feeding force provided to the billet 9, rams the ejector rod trolley 3 to complete the second bite. Subsequently, the roller 72 expands the outer diameter of the seamless steel pipe formed after the billet 9 is perforated with the help of the gradually shrinking outer ring on the right.
[0054] As an implementation manner of the present invention, referring to Figure 3 and Figure 4 , both the clamping motor 83 and the lifting motor 51 are servo motors. An annular sensor 721 is installed on the outer ring of the roller 72, and the annular sensor 721 is located at the left end of the roller 72. A chute 61 is opened on the right end face of the chuck 6. The number of chutes 61 is equal to the number of roller frames 71, and one of the chutes 61 is arranged vertically, and the other chutes 61 are symmetrically arranged with respect to the vertical chute 61. Slide rails and sliders are arranged on the side edges of the chute 61 and the side edges of the roller frame 71 to realize the sliding connection of the roller frame 71 on the chute 61.
[0055] The annular sensor 721 has multiple uses in this solution. Two of them are described as follows: 1) Sense the billet 9 in the above contact state and centering and clamping state to assist the operation; 2) In the clamping state, by comparing the measured values of the three annular sensors 721, the centering situation of the billet 9 can be obtained. The closer the three measured values are, the more accurate the centering is.
[0056] During the process of the lifting motor 51 following the clamping motor 83 to synchronously lift the billet 9 and the lower roller 72, the speed relationship between the clamping motor 83 and the lifting motor 51 is analyzed as follows: In this mode, the number of teeth of the input shaft 82 is 8, the number of teeth of the circumferential bevel gear structure of the clamping plate 81 is 80, and the transmission ratio is 10. Let the pitch of the planar thread 811 be a, and let the speed of the clamping motor 83 be n1. Then the distance that the roller frame 71 slides radially along the chuck 6 is
[0057]
[0058] In the lifting module 5, the lead screw 52 is directly connected to the lifting motor 51, and the transmission ratio is 1. Let the pitch of the lead screw 52 be b, and let the speed of the lifting motor 51 be n2. Then the height that the receiving plate 4 rises is
[0059] h2 = n2 × b
[0060] Since the lower chute 61 is inclined to the horizontal direction and the included angle is 30°, the vertical rising height of the lower roller 72 is
[0061]
[0062] The lower roller body 72 rises synchronously with the billet 9, that is, the variant is obtained
[0063]
[0064] Working principle: The present invention improves the way of the first bite of the piercing mill. Specifically, the original pusher 1 pushes the billet 9 so that the billet 9 is inserted between the three roller bodies 72, which is changed to the three roller bodies 72 synchronously radially sliding to clamp the billet 9, thereby avoiding the damage of the large-inertia billet 9 to the roller bodies 72; in addition, in order to ensure the stable centering of the billet 9 with a large outer diameter deviation, a receiving plate 4 that slides up and down is arranged on the conveying table 2, and with the help of the annular sensor 721, the clamping motor 83 and the lifting motor 51, the automatic control of the height of the receiving plate 4 is realized during the process of the roller bodies 72 clamping the billet 9;
[0065] Specifically, in order to make the three roller bodies 72 synchronously slide along the radial direction of the chuck 6, bevel gear structures and plane threads 811 are respectively arranged on the circumferential surface and the end surface of the clamping plate 81. The clamping motor 83 and the clamping plate 81 are driven by the input shaft 82, and then the rotation of the plane thread 811 drives the roller frame 71 to slide along the chute 61, so as to realize the synchronous expansion or clamping of the three roller bodies 72;
[0066] In order to control the lifting of the receiving plate 4, the receiving plate 4 is slidably connected to the conveying table 2, and a lead screw 52 is installed between the receiving plate 4 and the conveying table 2, and the up and down position of the receiving plate 4 is adjusted by the rotation of the lead screw 52;
[0067] In order to realize the automatic control of the height of the receiving plate 4 during the process of the roller bodies 72 clamping the billet 9, the clamping motor 83 and the lifting motor 51 use servo motors, and an annular sensor 721 is installed on the left side of the outer circle of the roller bodies 72. On the one hand, the annular sensor 721 is used to detect the centering situation of the billet 9. On the other hand, through the cooperation of the clamping motor 83 and the annular sensor 721, the displacement data of the roller bodies 72 is obtained, and this displacement data is synchronized with the lifting motor 51 to realize the synchronous adjustment of the height of the receiving plate 4, so as to realize the centering of the billet 9;
[0068] In order to reduce the impact on the receiving plate 4 and the lifting module 5, a block 41 is installed on the receiving plate 4, and then in the shutdown and material receiving states of the receiving plate 4, the block 41 abuts against the conveying table 2, so as to reduce the pressure time and impact strength of the lifting module 5 (lead screw 52 and lifting motor 51), thereby weakening the damage to the lead screw 52 and the lifting motor 51, and making the piercing mill run more stably.
[0069] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A servo-driven multi-axis linkage mechanism for processing the outer diameter of a seamless steel pipe, used for punching a steel billet (9), comprising a steel pusher (1), a conveying platform (2) and a push rod trolley (3), characterized in that: It also includes a material receiving plate (4), a lifting module (5), a chuck (6), a roller (7) and a clamping module (8), wherein the material receiving plate (4) is slidably connected to the conveying platform (2), the lifting module (5) is arranged between the material receiving plate (4) and the conveying platform (2), the chuck (6) is arranged on the right side of the conveying platform (2), a plurality of rollers (7) are arranged in a circular array on the right end surface of the chuck (6), and the clamping module (8) is installed inside the chuck (6); The steel billet (9) pushed by the steel pusher (1) enters between a plurality of rollers (7) from a receiving plate (4), and the plurality of rollers (7) are synchronously slid along the radial direction of the chuck (6) by the action of a clamping module (8), and the receiving plate (4) is adjusted up and down by a lifting module (5) to center the steel billet (9).
2. The servo-driven multi-axis linkage mechanism for outer diameter processing of seamless steel pipe according to claim 1, characterized in that: The clamping module (8) comprises a clamping plate (81), an input shaft (82) and a clamping motor (83); the clamping plate (81) is rotatably connected to the inside of the chuck (6); a bevel gear structure is arranged on the circumferential surface of the clamping plate (81), and a plane thread (811) is arranged on one end surface of the clamping plate (81); one end of the input shaft (82) is meshed with the bevel gear structure of the clamping plate (81); the output shaft of the clamping motor (83) is connected to the other end of the input shaft (82); and the plurality of rolling rollers (7) are all meshed with the plane thread (811).
3. The servo-driven multi-axis linkage mechanism for outer diameter processing of seamless steel pipe according to claim 2, characterized in that: The lifting module (5) comprises a lifting motor (51) and a lead screw (52), wherein the lifting motor (51) and the lead screw (52) are both mounted on the conveying platform (2), and the output shaft of the lifting motor (51) is connected to one end of the lead screw (52), and the lead screw (52) is inserted into the receiving plate (4) and meshed therewith.
4. The servo-driven multi-axis linkage mechanism for outer diameter processing of seamless steel pipe according to claim 3, characterized in that: The rolling roller (7) comprises a roller frame (71), a roller body (72), a roller motor (73) and a roller transmission (74); the roller frame (71) is slidably connected to the chuck (6), and the roller frame (71) is meshed with the plane thread (811); the roller body (72) is rotatably connected to the roller frame (71); the roller motor (73) is arranged on one side of the roller frame (71); and the roller transmission (74) is installed between the roller motor (73) and the roller body (72).
5. The servo-driven multi-axis linkage mechanism for outer diameter processing of seamless steel pipe according to claim 4, characterized in that: The clamping motor (83) and the lifting motor (51) are both servo motors. An annular sensor (721) is installed on the outer ring of the roller body (72), and the annular sensor (721) is located at the left end of the roller body (72).
6. The servo-driven multi-axis linkage mechanism for outer diameter processing of seamless steel pipe according to claim 4, characterized in that: A slide groove (61) is provided on the right end surface of the chuck (6), the number of the slide grooves (61) is equal to the number of the roller frames (71), and one of the slide grooves (61) is arranged along the vertical direction, and the other slide grooves (61) are arranged symmetrically with respect to the vertical slide groove (61), and the roller frame (71) is slidably connected inside the slide groove (61).
7. The servo-driven multi-axis linkage mechanism for outer diameter processing of seamless steel pipe according to claim 3, characterized in that: A clamping block (41) is installed on the material receiving plate (4), and the clamping block (41) is located between the conveying platform (2) and the material receiving plate (4).
8. The servo-driven multi-axis linkage mechanism for outer diameter processing of seamless steel pipe according to claim 7, characterized in that: The clamping block (41) is detachably mounted on the material receiving plate (4), and the clamping block (41) has a plurality of mounting positions in the upper and lower directions of the material receiving plate (4).
9. The servo-driven multi-axis linkage mechanism for outer diameter processing of seamless steel pipe according to claim 1, characterized in that: The upper surface of the receiving plate (4) is arranged to be an arc-shaped structure, and the curvature of the arc-shaped structure of the receiving plate (4) is smaller than the curvature of the maximum diameter steel billet (9).
10. The servo-driven multi-axis linkage mechanism for outer diameter processing of seamless steel pipe according to claim 4, characterized in that: The outer diameter of the right part of the roller body (72) gradually decreases from left to right, and the outer diameter of the left part of the roller body (72) is consistent.