CN212494651U - Extremely thin wall pipe base rounding device with automatic compensation function - Google Patents

Abstract

The utility model discloses an extremely thin-walled tube blank rounding device with automatic compensation function, which comprises a lathe, a rubber roller with one end fixed on a lathe chuck and a driven unit fixed on a lathe tool rest; the driven unit comprises a clamping block matched with the tool rest and a rear baffle matched with the clamping block, side plates are arranged on two sides of the rear baffle, and two groups of finishing rollers are arranged on the side plates; three bolts are arranged on the tool rest, the middle fixing bolt is matched with the upper surface of the clamping block, the limiting bolts on two sides are matched with the limiting holes in the clamping block, and the diameter of each limiting hole is larger than that of each limiting bolt. The utility model discloses structure application scope is wide, and machining efficiency is high, has effectively solved the unable multilayer sheathed tube problem of realizing of pipe behind the extremely thin wall strip welding shaping, the surface fish tail scheduling problem that shows when the above-mentioned conventional rounding device of solution that the device can be fine simultaneously rolls the circle.

Description

Extremely thin wall pipe base rounding device with automatic compensation function

Technical Field

The utility model belongs to the technical field of extremely thin wall pipe base rounding equipment, a extremely thin wall pipe base rounding device with automatic compensation function is related to, can warp to the rubber roll of rounding in-process and play the compensation, be particularly useful for accurate corrugated metal pipe base manufacturing installation.

Background

The metal corrugated pipe is an elastic element with a regular wave-shaped outer contour, and as the metal elastic element, the metal corrugated pipe not only has the high-temperature resistance and high-pressure resistance of a metal material, but also has the tensile and compressive properties of certain non-metal materials. Based on the excellent physical characteristics, the material can be widely applied to the fields of heat exchange, chemical engineering, aerospace and the like.

The main technical indexes for measuring the performance of the metal corrugated pipe are rigidity, strength, service life and the like, and the strength of the single-layer corrugated pipe is enhanced along with the increase of the wall thickness, but the rigidity of the corrugated pipe is increased, and the fatigue life is reduced. For this reason, corrugated pipe manufacturers often use multi-layer extremely thin-walled pipe blanks (wall thickness between 0.1mm and 0.3 mm) to produce corrugated pipes. Common tube blanks are seamless tube blanks and seamed tube blanks, and the wall thickness tolerance of the seamless tube blanks is larger than that of seamed tube blanks formed by welding thin-wall strips due to process reasons. The wall thickness is an important parameter influencing the performance of the corrugated pipe, so that a seamed pipe blank is selected when most metal corrugated pipes are formed. The section roundness of a pipe blank welded by a straight seam welding machine cannot meet the requirement of a multi-layer pipe blank sleeve, and meanwhile, the surface of the pipe blank possibly has defects such as folds and the like, and the pipe blank is required to be rounded by a rounding device and the surface is required to be trimmed. The fixing mode of the trimming roller of the existing rounding device is mostly a two-end fixed support structure, and no measure for protecting the surface quality of a tube blank exists. The two ends of the trimming roller are fixedly supported, so that the effective length of the tube blank during rounding cannot be greater than the length of the trimming roller, and the application range of the rounding device is limited. The trimming roller must be opened and closed when the pipe blank is loaded and unloaded every time, and the production efficiency of the rounding device is influenced. The surface quality of the tube blank is not protected by the trimming roller during rounding, the surface of the tube blank is scratched, the use performance of the corrugated tube is not greatly influenced by the surface scratch of the tube blank in the conventional field, but the surface scratch of the tube blank is not allowed when the corrugated tube is applied to important occasions such as nuclear power, aerospace and the like. Based on above background, the utility model provides an extremely thin wall pipe rounding device with automatic compensation function to solve the unable multilayer sheathed tube problem of realizing of pipe behind the extremely thin wall strip welding forming, the defect that demonstrates when the above-mentioned conventional rounding device of solution that the device can be fine simultaneously rounds.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the utility model provides an extremely thin wall pipe circle rolling device with automatic compensation function to solve extremely thin wall strip and weld the problem that the pipe circularity is not enough after the forming through the transversal welding machine, can't realize the multilayer sleeve pipe.

The utility model adopts the technical proposal that: the utility model provides an utmost point thin wall pipe base rounding device with automatic compensation function, includes the lathe, its characterized in that: the rubber roller is fixed on a lathe chuck at one end, and the driven unit is fixed on a lathe tool rest; the driven unit comprises a clamping block matched with the tool rest and a rear baffle matched with the clamping block, side plates are arranged on two sides of the rear baffle, and two groups of finishing rollers are arranged on the side plates; three bolts are arranged on the tool rest, the middle fixing bolt is matched with the upper surface of the clamping block, the limiting bolts on two sides are matched with the limiting holes in the clamping block, and the diameter of each limiting hole is larger than that of each limiting bolt.

Further: a gasket is arranged between the lower part of the clamping block and the tool rest, and a locking nut is arranged on the lower side of the fixing bolt.

Further: the diameter of the limiting hole is 2-5mm larger than that of the limiting bolt.

Further: the rubber roller comprises a steel bar and a rubber layer positioned on the outer side of the steel bar.

The utility model has the advantages that: this device can be to the pipe rounding of different specification diameters through changing the rubber roll, compares with the rounding device of finishing roller both ends solid support, and this device rubber roll one end is solid support, and the other end adopts unsettled design, and this structure can realize carrying out manual upset segmentation processing to the pipe billet for the rounding device can carry out the rounding to the long pipe billet that surpasss finishing roller length, has increased the application range of rounding device. In addition, one end of the rubber roller is suspended, so that loading and unloading of the rounding device can be more convenient, and the production efficiency of the rounding device is improved. Meanwhile, because the rounding device is processed in a segmented mode, the axial thrust borne by the rubber roll is only half of the axial thrust of the traditional rounding equipment theoretically when the tube blank is rounded, the requirement on the strength of the finishing roll is reduced, and the small-diameter long tube blank can be rounded. The driven device of the rounding device can realize slight swing on a horizontal plane to automatically compensate the deformation of the rubber roller, and the scheme can effectively solve the problem that the rubber roller, a tube blank and a driven trimming roller are not tightly jointed due to the fact that one end of the rubber roller is not limited to cause deformation, and the roundness deviation of each section of the tube blank is large. The active trimming roller adopts the rubber roller, so that the vibration caused by the operation of the rounding device can be reduced, and the surface of the tube blank can be prevented from being scratched. The device rubber roll is convenient to replace, and has great flexibility to the pipe blank rounding of different pipe diameters.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a view in the direction A of FIG. 1;

FIG. 3 is a view from the direction B of FIG. 2;

FIG. 4 is a schematic structural view of the driven unit;

FIG. 5 is a schematic view of the engagement structure of the driven unit and the tool post;

fig. 6 is an enlarged schematic view at C in fig. 5.

The sequence numbers in the figures illustrate: 1. a rubber roller; 2. a side plate; 3. a chuck; 4. a tailgate; 5. trimming the roller; 6. a clamping block; 7. a limiting hole; 8. fixing the bolt; 9. a limit bolt; 10. a gasket; 11. locking the nut; 12. a tool holder; 13 is a tube blank.

Detailed Description

As shown in fig. 1-6, the ultra-thin wall tube blank rounding device with the automatic compensation function of the structure of the utility model comprises a lathe, a chuck 3 and a movable tool rest 12 are arranged on the lathe, and the ultra-thin wall tube blank rounding device also comprises a rubber roller 1 with one end fixed on the chuck of the lathe and a driven unit fixed on the tool rest of the lathe; the rubber roller is of a structure that the outer side of the middle metal rod is coated with rubber, one side of the rubber roller is fixed, and the other side of the rubber roller is suspended, so that the tube blank 13 is sleeved on the rubber roller; the driven unit is close to the tube blank, and plays a role in rounding the tube blank and simply finishing and flattening fine wrinkles on the tube blank;

the driven unit comprises a clamping block 6 matched with the tool rest and a rear baffle 4 matched with the clamping block, side plates 2 are arranged on two sides of the rear baffle, and two groups of finishing rollers 5 are arranged on the side plates; the clamping block is welded or integrally connected with the rear baffle plate, the rear baffle plate is welded or in threaded connection with the side plate, the two groups of finishing rollers are arranged up and down, and two ends of the finishing rollers are connected with the side plate through bearings;

the tool rest is provided with three bolts, one of the three bolts is a fixing bolt 8 which is matched with the upper surface of the clamping block, the clamping block is pressed on the tool rest through pressure, and the clamping block can slightly rotate by taking a contact point as an axis; the head of the fixing bolt can be semicircular, and a groove matched with the fixing bolt is arranged on the clamping block so as to improve the compaction effect and facilitate the rotation; the bolts on the two sides are limit bolts 9 which are matched with limit holes 7 on the clamping block, and the diameter of the limit holes is larger than that of the limit bolts, so that the clamping block can have small displacement.

Preferably: a group of gaskets 10 is arranged between the lower part of the clamping block and the tool rest, and a locking nut 11 is arranged on the lower side of the fixing bolt; the lower end of the limiting bolt is pressed on the gasket or the lower plate of the cutter.

Preferably: the diameter of the limiting hole is 2-5mm larger than that of the limiting bolt.

Preferably: the rubber roll comprises a steel bar and a rubber layer located on the outer side of the steel bar, and threads are arranged on the outer surface of the steel bar to increase adhesion with the rubber hanging layer.

The structure is as follows the utility model discloses the manufacture process and the working process of structure are right the utility model discloses the structure is made and is further explained:

firstly, parts meeting the requirements are processed, and the rubber roller and the finishing roller are working surfaces which are in direct contact with the tube blank when the device works. The thickness of the rubber coating layer outside the surface of the rubber roller is preferably between 2 and 5mm according to the diameter of the tube blank. The surface finish Ra of the finishing roller is less than or equal to 0.8, and the end surface of the finishing roller and the rolling surface of the finishing roller have the requirement of circle run-out tolerance, which is usually not lower than 0.1. The size of the arc surface of the side plate can ensure that the tube blank does not interfere with the arc in the rounding process. The limiting hole of the clamping block is a through hole, the diameter of the through hole is provided with a gap with the round head of the limiting bolt, the size of the gap is related to the length of the dressing roller, and the gap is usually between 2 and 5 mm. A gap is also reserved between the clamping block and the tool rest to ensure that the driven device can swing on the horizontal plane. The device installation and use method is as follows: the rolling bearing is installed in a side plate bearing seat, a side plate carrying the bearing is connected with the finishing roller, the side plate is connected with a rear baffle through a fastening screw, and the rear baffle is connected with the clamping block through the fastening screw. The clamping block is connected with the lathe tool rest by two limiting bolts, a fixing bolt, a locking nut and a gasket group. When the device is installed, the central lines of the two finishing rollers and the central line of the rubber roller are ensured to be on the same horizontal plane, and the thickness of the gasket group is adjusted. The spacing bolt and the clamping block should leave a gap, the specific gap value is based on the fact that the driven device can swing on the horizontal plane, and the locking nut is locked after the gap is adjusted. Selecting a proper rubber roller diameter according to the diameter and the length of the tube blank, feeding the blank into the rubber roller, starting a lathe to drive the rubber roller to rotate, slowly pushing a tool rest to extrude the tube blank by using the rubber roller and a finishing roller to improve the roundness of the tube blank, and opening wrinkles; and (4) withdrawing the tool rest after the completion, and taking out the pipe blank after the lathe stops running. When the length of the tube blank exceeds the trimming roller, one end of the tube blank can be firstly rounded, then the cutter frame is retreated to stop the lathe from running, the tube blank is drawn out and reversely fed into the rubber roller to continue rounding the tube blank, the cutter frame is withdrawn, the lathe stops running, and the tube blank is taken out.

The utility model discloses the structure utilizes the lathe to drive the rubber roll rotation and provides kinetic energy for the rounding device, and two trimming roller of driven device and rubber roll confirm the radius of curvature of pipe by 3 points in same cross-section, carry out the rounding to the pipe extrusion through advancing that promotes the lathe knife rest. As shown in figure 5, when the tool rest moves downwards along the arrow direction, the right end of the dressing roller is in point contact with the rubber roll (or the tube blank), the left end of the dressing roller is provided with a gap h, if the angle can not be adjusted, uneven stress can be caused, the effect is influenced, and the service life is prolonged. The device can be used for rounding pipe billets with different specifications and diameters by replacing the rubber roller. Compared with a rounding device for fixedly supporting the two ends of the trimming roller, one end of a rubber roller of the rounding device is fixedly supported, the other end of the rubber roller is designed in a suspended mode, the structure can realize manual overturning and segmented processing of the pipe blank, the rounding device can round the long pipe blank exceeding the length of the trimming roller, the theoretical maximum rounding length is 2 times the length of the trimming roller, and the application range of the rounding device is enlarged. The loading and unloading of the tube blank welded and formed by the welding machine are carried out each time of rounding, and the loading and unloading of the rounding device can be more convenient due to the fact that one end of the rubber roll is suspended, so that the production efficiency of the rounding device is improved. With the increasing use requirements of the industry for metal corrugated pipes, the demand for small-diameter long pipe blank rounding equipment has arisen. Taking the tube blank with the diameter of 40mm and the length of 1400mm as an example, no mature rounding equipment can be purchased in the market at present. Adopt the rounding device of this patent can be fine to solve this problem. Because the rounding device is processed in a segmented mode, the axial thrust borne by the rubber roll is only half of the axial thrust of the traditional rounding equipment theoretically when the tube blank is rounded, the requirement on the strength of the finishing roll is reduced, and then the small-diameter long tube blank can be rounded. In practical operation, one end of the rubber roller is suspended, so that slight deformation can occur in the rounding process when the diameter of the rubber roller is smaller, and if the driven finishing roller cannot compensate the gap, local stress concentration of the rubber roller can be caused to influence the strength of the rubber roller and the rounding quality of the tube blank. The corresponding technical scheme is adopted for the deformation of the rubber roller: the driven device of the rounding device can realize slight swing on a horizontal plane to automatically compensate the deformation of the rubber roller, and the scheme can effectively solve the problem that the rubber roller, a tube blank and a driven trimming roller are not tightly jointed due to the fact that one end of the rubber roller is not limited to cause deformation, and the roundness deviation of each section of the tube blank is large. The swing of the driven device takes the fixed bolt as an axis, the gap between the limit bolt and the limit hole is taken as the maximum displacement, the vertical degree of freedom of the driven device on the tool rest is limited by the fixed bolt, a small gap is reserved between the driven device and the clamping block, the driven device is limited by the two limit bolts in the horizontal direction, and a gap is reserved between the through hole on the clamping block and the bottom round head of the limit bolt. And a gap is reserved on the contact surface of the clamping block and the tool rest to ensure that the driven device swings on the horizontal plane. Because the driven device can slightly swing on the horizontal plane, impact force can be generated when the driving trimming roller, the tube blank and the driven trimming roller are in instant contact, and the rolling device is caused to vibrate. Therefore, the active finishing roller is designed by adopting a steel bar external rubber layer. The rubber roller can absorb shock and can effectively prevent the surface of the tube blank from being scratched in the process of rounding. In order to increase the adhesive force between the steel bar and the rubber layer and prolong the service life of the rubber roller, the surface of the steel bar is machined by surface thread turning before the rubber is coated on the surface of the steel bar.

The utility model discloses utilize the lathe as power part, rubber roll one end adopts unsettled design to make this rounding device can overturn the pipe when the rounding to can carry out the rounding to the long tube base that surpasss finishing roller length, can be theoretically to the pipe rounding of 2 times finishing roller length. Because one end of the rubber roll is suspended, the tube blank can be more conveniently assembled and disassembled when the rounding device works, and the rounding efficiency is improved. The driven device adopts a swing design, automatically compensates the deformation of the rubber roller during working, and can well solve the problem that the roundness uniformity deviation of each section of the tube blank is large after the tube blank is formed due to the fact that the rubber roller, the tube blank and the driven finishing roller are not tightly attached. The active trimming roller adopts the rubber roller, so that the vibration caused by the operation of the rounding device can be reduced, and the surface of the tube blank can be prevented from being scratched. The device rubber roll is convenient to replace, and has great flexibility to the pipe blank rounding of different pipe diameters.

Claims (4)

1. The utility model provides an utmost point thin wall pipe base rounding device with automatic compensation function, includes the lathe, its characterized in that: the rubber roller is fixed on a lathe chuck at one end, and the driven unit is fixed on a lathe tool rest;

the driven unit comprises a clamping block matched with the tool rest and a rear baffle matched with the clamping block, side plates are arranged on two sides of the rear baffle, and two groups of finishing rollers are arranged on the side plates;

three bolts are arranged on the tool rest, the middle fixing bolt is matched with the upper surface of the clamping block, the limiting bolts on two sides are matched with the limiting holes in the clamping block, and the diameter of each limiting hole is larger than that of each limiting bolt.

2. The spheronization device of claim 1, characterized in that: a gasket is arranged between the lower part of the clamping block and the tool rest, and a locking nut is arranged on the lower side of the fixing bolt.

3. The spheronization device of claim 1, characterized in that: the diameter of the limiting hole is 2-5mm larger than that of the limiting bolt.

4. The spheronization device of claim 1, characterized in that: the rubber roller comprises a steel bar and a rubber layer positioned on the outer side of the steel bar.

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