CN111014302B - Multi-roller type seamless taper pipe ultra-precision forming device and seamless taper pipe forming process - Google Patents
Multi-roller type seamless taper pipe ultra-precision forming device and seamless taper pipe forming process Download PDFInfo
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- CN111014302B CN111014302B CN201911248346.2A CN201911248346A CN111014302B CN 111014302 B CN111014302 B CN 111014302B CN 201911248346 A CN201911248346 A CN 201911248346A CN 111014302 B CN111014302 B CN 111014302B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
- B21B17/02—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length
- B21B17/04—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length in a continuous process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/024—Rolls for bars, rods, rounds, tubes, wire or the like
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Abstract
The invention discloses a multi-roller type seamless taper pipe ultra-precision forming device and a seamless taper pipe forming process, wherein the forming device comprises a rack, a pipe driving device, a taper pipe forming roller die and a reciprocating mechanism; the conical tube forming roller die comprises a plurality of groups of forming modules which are sequentially arranged along the axial direction of a pipe to be processed, each group of forming modules comprises three roller die bodies which radially surround the axial line, a whole-round cold pressing die orifice is formed after the three roller die bodies are matched, and the diameter of the formed cold pressing die orifice is gradually increased or decreased along with the synchronous rotation of the three roller die bodies; during forming processing, the straight pipe entering the taper pipe forming roller die rotates, and the roller die body gives a straight pipe reaction force to carry out forming processing on the straight pipe. The method has the advantages that the method can process the capillary flexible seamless taper pipe in millimeter level, and the capillary flexible seamless taper pipe can meet the requirements of industrial production in terms of processing qualification rate and processing precision.
Description
Technical Field
The invention relates to the technical field of seamless taper pipe manufacturing, in particular to a multi-roller type seamless taper pipe ultra-precision forming device and a seamless taper pipe forming process.
Background
At present, the fields such as petroleum, chemical industry, medical treatment, fire control, electric power, mechanical equipment, logistics equipment, shipbuilding, building, instruments and meters, hot-water heating household electrical appliances, military affairs all need use the taper pipe, because the taper pipe main raw materials uses carbon steel as main, also can use various materials such as stainless steel, alloy steel obtain the taper pipe of different performance, traditional hot push shaping's mode can cause irreversible internal part substructure's change to the processing material, make the taper pipe that the processing obtained lose the performance of material itself, consequently, to some service environment that require high to the material, cold press shaping has become the mainstream of taper pipe processing.
For cold press molding of a taper pipe, the rolling type processing gradually replaces extrusion type processing to become the mainstream of the modern taper pipe cold press molding due to the advantages that the large-size pipe can be processed, the pipe has small bursting probability in the processing process, and the like, and in the patent application CN 109351777A applied and published by the department of China, the equipment for producing and processing the seamless taper pipe in the rotating rolling type is disclosed, is used for processing the seamless steel pipe into a conical hollow round pipe and comprises a rack, a driving mechanism, a rolling die assembly and a steel pipe feeding and demoulding mechanism; the rolling die assembly is slidably arranged in the rack and at least comprises a pair of rollers, the rollers are annularly provided with grooves, the distances from the bottom surfaces of the grooves to the center points of the rollers are different, and the grooves on the pair of rollers form a die cavity; the steel pipe is sent to a demoulding mechanism and is used for gradually sending the steel pipe into a rolling mould component; the driving mechanism drives the rolling die assembly to move left and right, and the pair of rollers which are opposite in rotation rotate at the same time, so that the steel pipe is rolled and formed in a die cavity formed by the pair of rollers.
The above patent basically solves the cold press molding processing of the taper pipe with the conventional size, but relates to a more precise capillary flexible seamless taper pipe under the specific requirements of medical instruments, instruments and meters, the outer diameter of the capillary flexible seamless taper pipe is 2.5-6.5mm, the device in the above patent has a mold which is a mold cavity consisting of grooves on a pair of rollers, the millimeter-grade taper pipe cannot be processed, even if the device is scaled in an equal proportion, the precision and the success rate of processing the taper pipe cannot reach the production requirements, and the processing cost of a single capillary flexible seamless taper pipe is very high.
Therefore, the existing taper pipe forming equipment cannot well process the capillary flexible seamless taper pipe at the millimeter level, the production requirements of the capillary flexible seamless taper pipe cannot be met in both the processing qualification rate and the processing precision, and a new seamless taper pipe ultra-precision forming device and forming process are urgently needed to meet the requirements of the market on the capillary flexible seamless taper pipe.
Disclosure of Invention
The invention aims to provide a multi-roller type seamless taper pipe ultra-precision forming device and a seamless taper pipe forming process. The method has the advantages that the method can process the capillary flexible seamless taper pipe in millimeter level, the processing qualification rate and the processing precision of the capillary flexible seamless taper pipe can meet the requirements of industrial production, and the manufacturing cost of the capillary flexible seamless taper pipe is reduced.
The technical scheme of the invention is as follows: the multi-roller type seamless taper pipe ultra-precision forming device comprises a rack, wherein a pipe driving device is arranged on the rack, the pipe driving device rotationally conveys a pipe to a taper pipe forming roller die, and the taper pipe forming roller die is connected with a reciprocating mechanism; the taper pipe forming roller die comprises a plurality of groups of forming modules which are sequentially arranged along the axis direction of a pipe to be processed, each group of forming modules comprises three roller die bodies which radially surround the distribution around the axis, the roller die bodies are fixed on the die frame, a circle of forming grooves are formed in the circumference of each roller die body, a cold pressing die orifice in a complete circle shape is formed after the forming grooves of the three roller die bodies are matched, and the diameter of the formed cold pressing die orifice is gradually increased or reduced along with the synchronous rotation of the three roller die bodies.
In the multi-roller type seamless taper pipe ultra-precision forming device, in two adjacent groups of forming modules along the linear motion direction of the taper pipe, the minimum cold pressing die orifice diameter of the front group of forming modules is larger than that of the rear group of forming modules and is smaller than that of the rear group of forming modules.
In the multi-roller type seamless taper pipe ultra-precision forming device, the center of the roller die body is provided with a shaft hole, and the roller die body is installed through the shaft.
In the multi-roller type seamless taper pipe ultra-precision forming device, the effective working length of the forming groove is 1/2-3/4 of the circumference of the forming groove.
Among the aforementioned how roll-type seamless taper pipe ultraprecise forming device, the die carrier includes a plurality of end to end's triangular prism shape inner core, is equipped with the through-hole that matches with the seamless taper pipe of production on the inner core central line, corresponds on the three side of inner core and is equipped with the closing cap, and the side of inner core is formed with the accommodation space that can supply roller mould body embedding behind the closing cap cooperation with corresponding, and the outside cover of cooperation body of a plurality of inner core and all closing caps has the cylindricality shell.
In the above multi-roller type seamless taper pipe ultra-precision forming device, two ends of the cylindrical shell are provided with limit stoppers.
Among the aforementioned how roll-type seamless taper pipe ultra-precision forming device, tubular product drive arrangement includes first linear motion driving motor, and first linear motion driving motor is connected with a pair of first lead screw, and first lead screw is put on the shelf and is equipped with the tubular product mounting panel, is equipped with the rotating electrical machines on the tubular product mounting panel, and the tubular product mounting panel is equipped with second linear motion driving motor along tubular product direction of feed one side, and second linear motion driving motor is connected with a pair of second lead screw, and the second lead screw is put on the shelf and is equipped with the tubular product layer board.
In the aforementioned multi-roller type seamless taper pipe ultra-precision forming device, the reciprocating mechanism comprises a rotary table, the edge of the rotary table is connected with a taper pipe forming roller die through a connecting rod, the bottom of the taper pipe forming roller die is connected with a sliding plate, and a sliding way for longitudinally limiting the sliding plate is arranged below the taper pipe forming roller die.
In the multi-roller type seamless taper pipe ultra-precision forming device, lattice baffles are arranged around the outer side of the taper pipe forming roller die.
The forming process for manufacturing the seamless taper pipe by adopting the multi-roller type seamless taper pipe ultra-precise forming device comprises the following steps: the equal-diameter straight pipe is installed on a pipe driving device, the equal-diameter straight pipe rotates under the action of the pipe driving device and is linearly input into the taper pipe forming roller die at a certain speed, the taper pipe forming roller die reciprocates under the driving of a reciprocating mechanism, the equal-diameter straight pipe entering the taper pipe forming roller die drives the roller die body to rotate, and the roller die body provides the reaction force of the equal-diameter straight pipe to perform rolling type forming processing on the equal-diameter straight pipe.
Compared with the prior art, the conical tube is subjected to rolling type cold press molding under the action of the conical tube molding roller die which reciprocates, wherein the conical tube molding roller die comprises a plurality of groups of molding modules which are sequentially arranged along the axial direction of a tube to be processed, each group of molding modules comprises three roller die bodies which are radially distributed around the axial line, the tube to be processed does linear feeding motion while rotating, the circular distribution design of the roller die bodies around one circle is compared with the existing mode design, so that the acting force is dispersed to three different roller die bodies when the tube contacts the roller die bodies, the three different roller die bodies simultaneously give the tube reaction force to carry out rolling type molding processing on the tube, the reaction force is more dispersed and uniform, the conical tube with higher processing precision is obtained, and the conical tube can be used for processing millimeter-level capillary flexible seamless conical tubes, and each group of molding modules of the invention is composed of three roller die bodies which are circularly distributed around the tube line, the self fault-tolerant rate of the roller die body is higher, the processing qualification rate and the processing precision of the capillary flexible seamless taper pipe can meet the requirements of industrial production, and the manufacturing cost of the capillary flexible seamless taper pipe is greatly reduced by adopting the equipment to process the capillary flexible seamless taper pipe.
Furthermore, in two adjacent groups of forming modules along the linear movement direction of the taper pipe, the minimum cold pressing die orifice diameter of the front forming module is larger than that of the rear forming module and is smaller than that of the rear forming module, and the size design ensures that the continuous forming processing of the taper pipe with the required length can be finished by only adjusting the number of the forming module groups under ideal conditions.
Furthermore, the effective working length of the forming groove of the roller die body is 1/2-3/4 of the circumference of the forming groove, the working area on the roller die body is reasonably utilized, and the conditions of interference between the roller die body and a pipe and the like in rolling processing can be effectively prevented; the roller die body is arranged on the die frame, the die frame comprises a plurality of triangular prism-shaped inner cores which are connected end to end, through holes matched with the produced seamless taper pipes are formed in the center lines of the inner cores, seal covers are correspondingly arranged on three side surfaces of the inner cores, and after the side surfaces of the inner cores are matched with the corresponding seal covers, an accommodating space for the roller die body to be embedded is formed inside the inner cores, so that the roller die body is customized, and the stability of equipment operation is improved.
In conclusion, the method has the advantages that the capillary flexible seamless taper pipe with millimeter level can be processed, the processing qualification rate and the processing precision of the capillary flexible seamless taper pipe can meet the requirements of industrial production, and the manufacturing cost of the capillary flexible seamless taper pipe is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a conical tube forming roller die;
FIG. 3 is a schematic structural view of a forming module;
FIG. 4 is a schematic structural view of the inner core;
FIG. 5 is a schematic view of the closure;
FIG. 6 is a schematic three-dimensional structure of a cylindrical housing;
FIG. 7 is a schematic cross-sectional view of a cylindrical housing;
fig. 8 is a schematic view showing a state where the molding module is mounted in the mold frame;
FIG. 9 is a schematic view of the installation of the conical tube forming roller die on the sliding plate;
fig. 10 is a schematic structural view of the tube driving device.
Reference numerals: 1-frame, 2-pipe driving device, 3-taper pipe forming roller die, 4-reciprocating mechanism, 31-forming module, 32-die carrier, 33-grid baffle, 201-first linear motion driving motor, 202-first lead screw, 203-pipe mounting plate, 204-rotating motor, 205-second linear motion driving motor, 206-second lead screw, 207-pipe supporting plate, 311-roller die body, 321-inner core, 322-sealing cover, 323-cylindrical shell, 324-limit stop, 325-through hole, 401-turntable, 402-connecting rod, 403-sliding plate and 404-slideway.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Example (b): the ultra-precise multi-roller type seamless taper pipe forming device is mainly used for processing a capillary flexible seamless taper pipe with the outer diameter of 2.5-6.5mm, and is structurally shown in figures 1-10, and comprises a rack 1, wherein a pipe driving device 2 is installed on the rack 1, the pipe driving device 2 is used for conveying a pipe to a taper pipe forming roller die 3 in a rotating manner, and the taper pipe forming roller die 3 is connected with a reciprocating mechanism 4; the taper pipe forming roller die 3 comprises a plurality of groups of forming modules 31 which are sequentially arranged along the axial direction of a pipe to be processed, each group of forming modules 31 comprises three roller die bodies 311 which radially surround the pipe to be processed around the axial direction, each roller die body 311 is fixed on the die frame 32, a circle of forming grooves are formed in the circumference of each roller die body 311, a cold pressing die opening in a whole circle shape is formed after the forming grooves of the three roller die bodies 311 are matched, and the diameter of the formed cold pressing die opening is gradually increased or reduced along with the synchronous rotation of the three roller die bodies 311.
In the practical application process, as the using length of the capillary flexible seamless taper pipe is not required to be too long, the number of the forming modules 31 in the embodiment is 4, and the production requirement can be met; in two adjacent groups of forming modules 31 along the direction of the linear movement of the taper pipe, the diameter of the minimum cold pressing die orifice of the front forming module 31 is larger than that of the minimum cold pressing die orifice of the rear forming module 31 and is smaller than that of the maximum cold pressing die orifice of the rear forming module 31, that is, each roller die body 311 of the invention is designed in size, so that the diameters of the circular cold pressing die orifices formed by the front and rear forming modules 31 are partially overlapped with each other, and the continuous cold pressing forming of the seamless taper pipe in a multistage alternating manner is carried out; the center of the roller die body 311 is provided with a shaft hole, and the roller die body 311 is installed through the shaft; the effective working length of the forming groove is 1/2-3/4 of the circumference of the forming groove, the working area on the roller die body 311 is reasonably utilized, and the conditions of interference between the roller die body 311 and the pipe and the like in the rolling process can be effectively prevented.
The die carrier 32 comprises a plurality of triangular prism-shaped inner cores 321 connected end to end, through holes 325 matched with the produced seamless taper pipes are formed in the center lines of the inner cores 321, sealing covers 322 are correspondingly arranged on three side faces of the inner cores 321, accommodating spaces capable of being embedded into the roller die body 311 are formed in the inner portions of the side faces of the inner cores 321 matched with the corresponding sealing covers 322, the accommodating spaces are slightly larger than the size of the roller die body 311, so that a certain adjusting space is formed in the radial direction after the roller die body 311 is installed, cylindrical outer shells 323 are sleeved outside matching bodies of the inner cores 321 and all the sealing covers 322, all the sealing covers 322 and the matching bodies of the inner cores 321 are sealed and fixed for radial limiting, limiting stoppers 324 are arranged at two ends of the cylindrical outer shells 323 for axial limiting, and the die carrier 32 is customized for the roller die body 311, and is beneficial to improving the running stability of the equipment.
The pipe driving device 2 comprises a first linear motion driving motor 201, so that the pipe realizes linear feeding motion, the first linear motion driving motor 201 is connected with a pair of first lead screws 202, a pipe mounting plate 203 is erected on the first lead screws 202, a rotating motor 204 is arranged on the pipe mounting plate 203, so that the pipe realizes rotating motion, a second linear motion driving motor 205 is arranged on one side of the pipe mounting plate 203 along the pipe feeding direction, the second linear motion driving motor 205 is connected with a pair of second lead screws 206, a pipe supporting plate 207 is erected on the second lead screws 206, and the supporting plate realizes linear motion under the action of the second linear motion driving motor 205 to assist the linear motion of the pipe; the reciprocating mechanism 4 comprises a turntable 401, the turntable 401 is connected with a motor through a transmission part with a certain size, the edge of the turntable 401 is connected with a taper pipe forming roller die 3 through a connecting rod 402, the bottom of the taper pipe forming roller die 3 is connected with a sliding plate 403, a slideway 404 for longitudinally limiting the sliding plate 403 is arranged below the taper pipe forming roller die 3, and the taper pipe forming roller die 3 is prevented from being separated from the slideway 404 with linear motion; and grid baffles 33 are arranged around the outer side of the conical tube forming roller die 3, so that a forming processing part is separated from a driving part of a front tube, and the management and the maintenance are convenient.
The taper pipe forming process comprises the following steps: the equal-diameter straight pipe is arranged on a pipe driving device 2, a conical core rod is inserted into the equal-diameter straight pipe for forming to serve as an inner mold, the equal-diameter straight pipe rotates under the action of a first linear motion driving motor 201, a first lead screw 202 and a rotating motor 204 and is linearly input into a conical pipe forming roller mold 3 at a certain speed, the conical pipe forming roller mold 3 is driven by a reciprocating mechanism 4 to reciprocate while the equal-diameter straight pipe and the core rod are synchronously fed, the equal-diameter straight pipe entering the conical pipe forming roller mold 3 drives a roller mold body 311 to rotate, and meanwhile the roller mold body 311 gives a reaction force to the equal-diameter straight pipe to carry out continuous rolling type forming processing on the equal-diameter straight pipe so as to process the equal-diameter straight pipe into a seamless conical pipe.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Claims (8)
1. The ultra-precise forming device of the multi-roll type seamless taper pipe is characterized in that: the pipe forming machine comprises a rack (1), wherein a pipe driving device (2) is installed on the rack (1), the pipe driving device (2) conveys a pipe to a taper pipe forming roller die (3) in a rotating mode, and the taper pipe forming roller die (3) is connected with a reciprocating mechanism (4); the taper pipe forming roller die (3) comprises a plurality of groups of forming modules (31) which are sequentially arranged along the axial direction of a pipe to be processed, each group of forming modules (31) comprises three roller die bodies (311) which radially surround the axial line and are distributed, the roller die bodies (311) are fixed on a die carrier (32), a circle of forming grooves are formed in the circumference of each roller die body (311), the forming grooves of the three roller die bodies (311) are matched to form a whole-round cold pressing die orifice, and the diameter of the formed cold pressing die orifice is gradually increased or reduced along with the synchronous rotation of the three roller die bodies (311);
the roll die comprises a die frame (32) and a plurality of die holders (32), wherein the die holder (32) comprises a plurality of triangular prism-shaped inner cores (321) which are connected end to end, a through hole (325) matched with a produced seamless taper pipe is formed in the center line of each inner core (321), sealing covers (322) are correspondingly arranged on three side surfaces of each inner core (321), an accommodating space for embedding the roll die body (311) is formed in the side surface of each inner core (321) and the corresponding sealing cover (322) after the side surface of each inner core (321) is matched with the corresponding sealing cover, and a cylindrical shell (323) is sleeved outside a matching body of the inner cores (321) and all the sealing covers (322);
when the seamless taper pipe is formed: the equal-diameter straight pipe is installed on a pipe driving device, the equal-diameter straight pipe rotates under the action of the pipe driving device and is linearly input into the taper pipe forming roller die at a certain speed, the taper pipe forming roller die reciprocates under the driving of a reciprocating mechanism, the equal-diameter straight pipe entering the taper pipe forming roller die drives the roller die body to rotate, and the roller die body provides the reaction force of the equal-diameter straight pipe to perform rolling type forming processing on the equal-diameter straight pipe.
2. The multi-roll type seamless taper pipe ultra-precision molding apparatus according to claim 1, wherein: in two adjacent groups of forming modules (31) along the straight movement direction of the taper pipe, the minimum cold-pressing die orifice diameter of the front forming module (31) is larger than that of the rear forming module (31) and is smaller than that of the rear forming module (31).
3. The multi-roll type seamless taper pipe ultra-precision molding apparatus according to claim 2, wherein: the center of the roller die body (311) is provided with a shaft hole, and the roller die body (311) is installed through the shaft.
4. The multi-roll seamless taper pipe ultra-precision molding apparatus according to claim 1, 2 or 3, wherein: the effective working length of the forming groove is 1/2-3/4 of the circumference of the forming groove.
5. The multi-roll type seamless taper pipe ultra-precision molding apparatus according to claim 1, wherein: and two ends of the cylindrical shell (323) are provided with limit stoppers (324).
6. The multi-roll type seamless taper pipe ultra-precision molding apparatus according to claim 1, wherein: the pipe driving device (2) comprises a first linear motion driving motor (201), the first linear motion driving motor (201) is connected with a pair of first lead screws (202), a pipe mounting plate (203) is erected on the first lead screws (202), a rotating motor (204) is arranged on the pipe mounting plate (203), a second linear motion driving motor (205) is arranged on the pipe mounting plate (203) along one side of the pipe feeding direction, the second linear motion driving motor (205) is connected with a pair of second lead screws (206), and a pipe supporting plate (207) is erected on the second lead screws (206).
7. The multi-roll type seamless taper pipe ultra-precision molding apparatus according to claim 1, wherein: the reciprocating mechanism (4) comprises a rotary table (401), the edge of the rotary table (401) is connected with a conical tube forming roller die (3) through a connecting rod (402), the bottom of the conical tube forming roller die (3) is connected with a sliding plate (403), and a sliding way (404) for longitudinally limiting the sliding plate (403) is arranged below the conical tube forming roller die (3).
8. The multi-roll type seamless taper pipe ultra-precision molding apparatus according to claim 1, wherein: and grid baffles (33) are arranged around the outer side of the conical tube forming roller die (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911248346.2A CN111014302B (en) | 2019-12-09 | 2019-12-09 | Multi-roller type seamless taper pipe ultra-precision forming device and seamless taper pipe forming process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911248346.2A CN111014302B (en) | 2019-12-09 | 2019-12-09 | Multi-roller type seamless taper pipe ultra-precision forming device and seamless taper pipe forming process |
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| CN111014302A CN111014302A (en) | 2020-04-17 |
| CN111014302B true CN111014302B (en) | 2021-07-23 |
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| CN112090984B (en) * | 2020-07-17 | 2022-08-23 | 杭州淳通新材料科技有限公司 | Forming process of chromium molybdenum vanadium steel seamless taper pipe |
| CN113180786B (en) * | 2021-04-29 | 2023-02-03 | 杭州淳通新材料科技有限公司 | TC4 ultrasonic scalpel and manufacturing method thereof |
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