CN113441795A - Small-diameter thin-wall spiral high-rib inner finned tube machining equipment and machining method - Google Patents
Small-diameter thin-wall spiral high-rib inner finned tube machining equipment and machining method Download PDFInfo
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- CN113441795A CN113441795A CN202110733974.0A CN202110733974A CN113441795A CN 113441795 A CN113441795 A CN 113441795A CN 202110733974 A CN202110733974 A CN 202110733974A CN 113441795 A CN113441795 A CN 113441795A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F5/00—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made
- B23F5/12—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by planing or slotting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F23/00—Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F23/00—Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
- B23F23/02—Loading, unloading or chucking arrangements for workpieces
- B23F23/06—Chucking arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
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Abstract
The invention discloses a processing device and a processing method for a small-diameter thin-wall spiral high-rib inner finned tube, wherein the processing device comprises a power seat, a main workbench and a tailstock which are sequentially arranged on a frame body with a horizontal transverse guide rail, a cutter bar and a cutter head which are driven by a stepping motor are arranged on the power seat, a supporting block for supporting a heat exchange tube is arranged on the main workbench, a half clamp group is arranged at the middle section of the cutter bar, and an ejector rod is arranged on the tailstock; the power seat drives the power seat to reciprocate left and right through an eccentric wheel connected with the power transmission device and push plates on two sides, the eccentric wheel is connected with a rotating wheel through a pair of meshed bevel gears, a grooved wheel is connected with a screw rod, and a split nut drives a main workbench; the processing method comprises the steps of machining fins by the aid of reciprocating motion and stepping rotation of a cutter head, intermittent unidirectional motion of a heat exchange tube and the like, and adjusting different motion parameters to machine finned tubes with different parameters. The invention can solve the problems of high processing difficulty and difficult batch production of the existing small-diameter thin-wall spiral high-rib inner finned tube.
Description
Technical Field
The invention relates to the technical field of heat exchange of compressors, in particular to a method and equipment for machining a spiral high-rib inner fin in a small-diameter thin-wall heat exchange tube.
Background
The prior art for processing the inner finned tube mainly adopts low ribs, and the equipment and the process are mainly formed by implanting special large-scale equipment and processes in the process of processing a copper tube, so that the equipment investment is large, the price is high, the equipment and the process are suitable for mass production, and the type of the fins is only suitable for the refrigeration and air-conditioning industry. The cooler in the compressor industry generally requires the characteristics of simple and reliable structure, small volume, high heat exchange efficiency, large bearing pressure and the like, particularly the cooler in a cooled gas pipe has high requirements on the inner surface of a reinforced pipe, the reinforcement of the inner surface of the pipe is mainly based on an insert, and therefore the small-diameter thin-wall spiral high-rib inner finned pipe is required.
However, the difficulty in processing the small-diameter thin-wall spiral high-rib inner finned tube is very high, and the following problems are often encountered: 1. the phenomenon that a cutter pierces through the tube wall easily occurs when a spiral high rib (1-2 mm) inner fin is processed in a heat exchange tube with a small diameter (d is less than or equal to phi 12) and a thin wall (delta is less than or equal to phi 1 mm); and the outer surface of the processed finished product is easy to bulge, and the straightness has the phenomena of bending deformation and the like, so that the problem that how to avoid the phenomena is required to be solved is solved. 2. The equipment needs to have the characteristics of miniaturization, easy operation, high reliability, low manufacturing difficulty and cost, localization of parts and the like, and the higher requirement is provided for selecting the design scheme of the equipment. 3. The equipment and the processing technology need to be capable of adapting to diversified adjustment of fin parameters (parameters such as rib width, rib height, fin pitch, helical angle, circumferential rib number and the like), which puts higher requirements on the overall design. Therefore, a method and equipment for processing the small-diameter thin-wall spiral high-rib inner finned tube are needed to meet the market demand.
Disclosure of Invention
The invention aims to solve the problem that the processing equipment of the small-diameter thin-wall spiral high-rib inner finned tube is provided to solve the problems that the processing difficulty of the existing small-diameter thin-wall spiral high-rib inner finned tube is high and the batch production is difficult.
In order to solve the problems, the technical scheme of the invention is as follows: the small-diameter thin-wall spiral high-rib inner finned tube processing equipment comprises a power seat, a main workbench and a tailstock, wherein the power seat, the main workbench and the tailstock are sequentially arranged on a frame body with a horizontal transverse guide rail; the power seat drives the power seat to reciprocate left and right through an eccentric wheel connected with a power transmission device and push plates on two sides of a rotating plane of the eccentric wheel, the eccentric wheel is connected with a rotating wheel through a pair of meshed bevel gears, the rotating wheel is connected with a screw rod through a grooved wheel uniformly distributed with a plurality of notches in the radial direction, and the main workbench is connected with the screw rod through a split nut on the lower part of the main workbench; and the main workbench and the tailstock are respectively provided with a locking device for locking the main workbench and the tailstock on the horizontal cross guide rail.
In the above technical solution, a more specific solution may be: the afterbody blade of tool bit is the even profile of tooth blade that disperses of claw type, the ejector pin head diminishes to be the tapering.
Further: the ejector rod is connected with the tailstock through a supporting block, an ejector rod adjusting screw used for adjusting the ejector rod to move transversely is arranged at the tail end of the ejector rod, and the ejector rod adjusting screw is arranged on the supporting block of the tailstock.
Further, the method comprises the following steps of; the stepping motor, the cutter bar, the cutter head and the ejector rod are respectively provided with a plurality of parts which are longitudinally arranged on the power seat, the main workbench and the tailstock side by side.
In order to solve the above problems, the technical solution of the present invention may further be: the processing method of the small-diameter thin-wall spiral high-rib inner finned tube comprises the following steps: the helical high-rib inner fins are processed in the heat exchange tube with the small diameter and the thin wall, the cutter head in the heat exchange tube is linearly fed to complete the gear shaping stroke, the cutter head rotates for an angle through a stepping motor after returning, meanwhile, the cutter head is closed and opened through a grooved pulley driving screw rod and a split nut in the returning process to control the heat exchange tube to perform unidirectional linear motion for a distance and then stops, the cutter head is fed again to complete the next gear shaping stroke, and the gear shaping stroke is repeated so as to complete the processing of all the helical high-rib inner fins in the heat exchange tube.
In the above technical solution, a more specific solution may be: the processing method comprises the following steps: step A, tool adjustment: moving the power seat, the cutter bar and the cutter head to the right limit position together, moving the tailstock and the ejector rod to the left together to insert the front end of the ejector rod into an inner hole of the cutter head, continuously moving the tailstock and the ejector rod to the left to push a tapered inclined plane at the front end of the ejector rod to open a tooth-shaped cutting edge of the cutter head, measuring the external diameter size of the cutter head after opening, stopping moving the tailstock to the left when the parameter size of the required gear shaping is reached, recording the position parameter of the tailstock at the moment, and finishing the position adjustment of the cutter;
step B, tube loading: moving the power seat, the cutter bar and the cutter head to the left limit position, moving the tailstock and the ejector rod to the right together, separating the cutter head and the ejector rod to the position for loading the heat exchange tube, opening the split nut, moving the main workbench to the initial position of the gear shaping of the heat exchange tube, and fastening two ends of the heat exchange tube by using a half clamp group;
step C, gear shaping: moving the tailstock and the ejector rod to the left to the tailstock position recorded by the cutter adjustment, and locking the tailstock by using a locking device to make the tailstock immovable; then the opening and closing nut is closed to enable the main workbench and the screw rod to be meshed together, and the power seat is started to do reciprocating motion to start gear shaping of the heat exchange tube; when the power seat moves rightwards, the power seat is in a gear shaping stroke, the rotating wheel and the grooved wheel are in an unmeshed state, the screw rod is also in an unrotated state, and the main workbench is still; when the power seat moves leftwards, the power seat is in a return stroke without gear shaping, at the moment, the rotating wheel is meshed with the grooved wheel, the screw rod rotates, the main workbench moves leftwards in a unidirectional intermittent mode for a distance, and meanwhile, the stepping motor rotates for a step angle; when the power seat moves rightwards again, the next gear shaping stroke is completed, and the machining of the inner finned tube can be completed through the repeated operation.
Further: further comprising the step D of parameter adjustment: the distance of the main worktable which moves towards the right in a unidirectional and intermittent way can be changed by changing grooved wheels with different groove numbers, so that the tooth pitch is changed; the rotating angle of the inner fin can be changed by changing the angle degree of the stepping motor rotating by one step; adjusting the ejector rod adjusting screw to control the degree of the ejector rod pressing the cutter head, namely adjusting the opening and closing degree of the tooth-shaped cutting edge of the cutter head so as to process fins with different heights; the number of the inner finned tubes can be changed by changing the cutter heads with different tooth numbers.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. the processing method of the small-diameter thin-wall spiral high-rib inner finned tube processes the spiral high-rib inner fin in the small-diameter thin-wall heat exchange tube through actions such as reciprocating motion, stepping rotary motion, unidirectional intermittent motion, flexible contact and the like, so that the inner surface of the heat exchange tube is strengthened to the utmost, the use of heat exchange tube materials can be greatly reduced, the heat exchange tube is used with the lowest weight cost, and the resource consumption is saved;
2. according to the processing equipment for the small-diameter thin-wall spiral high-rib inner finned tube, the heat exchange tube is sleeved into the cylindrical cutter head part at the tail end of the cutter bar, the cutter head is tightly pressed by the ejector rod, the cutter head of the cutter bar rotates in a stepping mode through the stepping motor, the cutter bar and the heat exchange tube are assembled by combining the half clamp, the cutter bar cutter head is in flexible contact with the heat exchange tube, so that spiral forming is realized, the requirements on the straightness of the heat exchange tube and the manufacturing precision of an equipment guide rail by the flexible contact are not high, and the equipment has high adaptability; the reciprocating motion of the power seat is realized through the eccentric wheel and the push plates on the two sides; the eccentric wheel is connected with a rotating wheel backwards through a pair of meshed bevel gears, the rotating wheel is connected with a lead screw and a split nut through a grooved wheel to drive the main workbench to move in a unidirectional intermittent manner, so that the heat exchange tube on the main workbench and the tool bit move in a unidirectional intermittent manner;
3. the processing mechanism formed by the stepping motor, the cutter bar, the cutter head and the ejector rod of the small-diameter thin-wall spiral high-rib inner finned tube processing equipment is provided with a plurality of sets of processing mechanisms which are arranged in parallel on the power seat, the main workbench and the tailstock, and can simultaneously process a plurality of heat exchange tubes to realize batch processing, and only one set of transmission mechanism comprising an eccentric wheel, a pair of meshing bevel gears, a rotating wheel, a grooved pulley, a screw rod and a split nut is driven by a power transmission device, so that a plurality of sets of cutters can be driven to realize the processing of the plurality of heat exchange tubes, and the labor cost and the energy consumption resources are greatly reduced; the rotating angle of the inner fin can be changed by changing the angle degree of the stepping motor rotating by one step; the distance of the main worktable which moves towards the right in a unidirectional and intermittent way can be changed by changing grooved wheels with different groove numbers, so that the tooth pitch is changed; the degree of the mandril to compress the cutter head is controlled by adjusting the mandril adjusting screw, so that the opening and closing degree of the tooth-shaped cutting edge of the cutter head can be adjusted to realize the processing of different fin heights; the number of the inner finned tubes can be changed by changing the cutter heads 22 with different tooth numbers; the half clamp is convenient to assemble and clamp; the method can easily realize the diversity change of fin parameters and the diversity of fin parameters by adjusting the rotation angle of the stepping motor, changing the grooved pulley group, adjusting the cutter, the clamp, the ejector rod and the like, and is convenient for the selective use of the compressor coolers under different working conditions;
the processing equipment for the small-diameter thin-wall spiral high-rib inner finned tube has the advantages of simple structure, small equipment and clamp size, easiness in operation and high reliability, and can be used for processing heat exchange tubes with relatively fixed sizes such as tube diameter, length and fin parameters as general parts of a cooler by combining a processing method, so that the standardized and batch production of the compressor cooler can be effectively realized.
Drawings
FIG. 1 is a front view of an embodiment of the present invention;
FIG. 2 is a top view of the inside of a housing according to an embodiment of the present invention;
FIG. 3 is a top view of a primary table according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view taken at A of FIG. 1;
FIG. 5 is a view from the direction B of FIG. 2;
FIG. 6 is an enlarged view at C of FIG. 1;
FIG. 7 is a front view of a tool tip according to an embodiment of the invention;
FIG. 8 is a left side view of a tool tip according to an embodiment of the invention;
fig. 9 is a structural view of a heat exchange tube fin processed by the embodiment of the invention.
Detailed Description
The embodiments of the invention will be described in further detail with reference to the accompanying drawings:
the small-diameter thin-wall spiral high-rib finned tube processing equipment shown in fig. 1 to 3 comprises a power seat 4, a main workbench 9 and a tailstock 12 which are sequentially arranged on a frame body with a horizontal transverse guide rail, and a machine shell 24 is arranged on a frame 13 below the horizontal transverse guide rail 27. The main worktable 9 and the tailstock 12 are provided with a locking device for locking the main worktable 9 and the tailstock 12 on a horizontal cross rail 27, a locking device 17 of the main worktable 9 and a locking device 14 of the tailstock 12. The main worktable 9 and the tailstock 12 can be driven by a handle or a motor.
The power seat 4 is provided with a cutter bar 6 which is transversely arranged and driven by a stepping motor 19, the stepping motor is connected with and drives the cutter bar 6 through a shaft seat and a coupler 5, the tail part of the cutter bar 6 is provided with a cylindrical cutter head 22, the tail part cutting edge of the cutter head 22 is a claw-shaped uniformly-dispersed tooth-shaped cutting edge 22-1, and the tail part of the cutter bar 6 gradually enlarges to form a taper. The main working table 9 is provided with a supporting block 23 for supporting the heat exchange tube 8, the main working table 9 is provided with a half clamp group 7 for clamping or loosening the heat exchange tube, the tailstock 12 is provided with an ejector rod 10 for ejecting a tool bit 22 during machining, the ejector rod 10 is connected with the tailstock 12 through the supporting block 23, the head of the ejector rod 10 gradually reduces to be tapered, the tail end of the ejector rod 10 is provided with an ejector rod adjusting screw 11 for adjusting the transverse movement of the ejector rod, the ejector rod adjusting screw 11 is arranged on the supporting block 23 of the tailstock, the degree of compression of the ejector rod on the tool bit is controlled through the adjusting ejector rod adjusting screw 11, the opening and closing degree of the claw shape can be adjusted, and machining of different fin heights is realized.
The power seat 4 drives the power seat 4 to reciprocate left and right through an eccentric wheel 18 connected with a power transmission device and push plates 25 on two sides of a rotating plane of the eccentric wheel 18, so that a stepping motor 19 on the power seat 4 and a cutter head 22 of the cutter bar 6 reciprocate left and right together, and the stepping motor rotates step by step, so that the cutter head 22 of the cutter bar 6 rotates step by step and reciprocates linearly relative to a heat exchange tube 8 outside the cutter head; the power transmission device comprises a motor 1 right below a shell 24 and connected with a speed reducer 2 of the motor, wherein the speed reducer 2 is connected with a power wheel 3 in the shell, and an eccentric wheel 18 is connected with a rotating shaft of the power wheel 3; the eccentric wheel 18 is connected with a rotating wheel 21 through a pair of meshed bevel gears 26, and then is connected with a screw rod 15 through a grooved wheel 20 which is radially and uniformly provided with a plurality of notches, and the main workbench 9 is connected with the screw rod 15 through an open-close nut 16 at the lower part of the main workbench; the eccentric wheel 18 is connected with a rotating wheel 21, the grooved wheel 20 is connected with a screw rod 15 and an opening and closing nut 16 to drive the main workbench 9 to do unidirectional intermittent motion, so that the heat exchange tube 8 on the main workbench and the cutter head 22 do unidirectional intermittent motion.
The stepping motor 19, the cutter bar 6, the cutter head 22 and the ejector rod 10 are respectively provided with a plurality of steps and are longitudinally arranged on the power seat 4, the main workbench 9 and the tailstock 12 side by side, a plurality of heat exchange tubes 8 can be synchronously processed at the same time, the batch production is realized, and only one set of transmission mechanism comprising an eccentric wheel 18 driven by a power transmission device, a pair of meshing bevel gears 26, a rotating wheel 21, a grooved wheel 20, a screw rod 15 and an opening and closing nut 16 is adopted, so that a plurality of sets of cutters can be driven to realize the processing of the plurality of heat exchange tubes, and the labor cost and the energy consumption resources are greatly reduced.
The processing method of the small-diameter thin-wall spiral high-rib inner finned tube comprises the following steps of processing the spiral high-rib inner fin on the small-diameter thin-wall heat exchange tube by using small-diameter thin-wall spiral high-rib inner finned tube processing equipment, wherein the processing method comprises the following steps:
step A, tool adjustment: the eccentric wheel 18 is rotated to move the power seat 4, the cutter bar 6 and the cutter head 22 to the right limit position together, then the tailstock 12 and the ejector rod 10 move to the left together, the front end of the ejector rod 10 is inserted into the inner hole of the cutter head 22, the left movement is continued, the tapered inclined surface at the front end of the ejector rod 10 pushes the tooth-shaped cutting edge of the cutter head 22 open, the outer diameter size of the cutter head 22 after opening is measured, the tailstock 12 is stopped moving to the left when the parameter size of the required gear shaping is achieved, the position parameter of the tailstock at the moment is recorded, and the position adjustment of the cutter is completed.
Step B, tube loading: rotating the eccentric wheel 18 to move the power seat 4, the cutter bar 6 and the cutter head 22 to the left limit position, then moving the tailstock 12 and the ejector rod 10 to the right together, separating the cutter head 22 from the ejector rod 10 to a position where the heat exchange tube 8 can be loaded, then opening the split nut 16, moving the main workbench 9 to an initial position where the heat exchange tube 8 is cogged, and fastening two ends of the heat exchange tube 8 by using the half clamp group 7 to finish tube loading.
Step C, gear shaping: the tailstock 12 is moved leftward together with the ram 10 to the tailstock position recorded by the tool setting, and the tailstock 12 is locked by the locking device 14 so as not to be moved. Then the opening and closing nut 16 is closed to enable the main working table 9 to be meshed with the screw rod 15, the power seat 4 is started to do reciprocating motion to start gear shaping of the heat exchange tube 8, the cutter head 22 is linearly fed to complete a gear shaping stroke, the cutter head 22 is rotated for an angle through the stepping motor 19 after returning, meanwhile, the screw rod 15 and the opening and closing nut 16 are driven by the grooved wheel 20 to control the heat exchange tube 8 to do unidirectional linear motion for a distance in the returning process and then stop, the cutter head 22 is fed again to complete the next gear shaping stroke, and then the heat exchange tube 8 continues to perform unidirectional linear motion for the same distance when returning the cutter head 22, so that the heat exchange tube 8 does unidirectional intermittent linear motion, and the cutter head 22 does reciprocating linear motion and intermittent rotary motion. When the power seat 4 moves rightwards, the gear shaping stroke is achieved, at the moment, the rotating wheel 21 and the grooved wheel 20 are in an unmeshed state, the screw rod 15 is also in an unrotated state, and the main workbench 9 is still; when the power seat 4 moves leftwards, the power seat is a return stroke without gear shaping, at the moment, the rotating wheel 21 is meshed with the grooved wheel 20, the screw rod 15 rotates, the main worktable 9 moves intermittently rightwards for a distance in a unidirectional way, and meanwhile, the stepping motor 19 rotates for a step angle; when the power seat 4 moves rightwards again, the next gear shaping stroke is completed, and the machining of the inner finned tube can be completed through the repetition.
Step D, parameter adjustment: the distance of the right one-way intermittent motion of the main worktable 9 can be changed by changing the grooved wheels 20 with different groove numbers, thereby changing the tooth pitch; the rotation angle of the inner fin can be changed by changing the angle degree of the stepping motor 19 rotating by one step; adjusting a mandril adjusting screw 11 to control the compression degree of the mandril to the cutter head, namely adjusting the opening and closing degree of the tooth-shaped cutting edge of the cutter head so as to process fins with different heights; the number of fins of the inner finned tube can be changed by changing the cutter heads 22 with different tooth numbers.
The resistance loss of the small-diameter thin-wall spiral high-rib inner finned tube processed by the equipment and the method can be reduced by more than 50 percent compared with the resistance loss of an insert high-efficiency heat exchange tube, so that the specific power of a compressor is reduced, and the power consumption of a motor of the compressor is reduced; the volume of the compressor cooler with the volume of less than 200 cubic meters is reduced by about one half compared with the original volume, the precious metals such as copper materials are reduced by about one third, and simultaneously, the water consumption is also obviously reduced, thereby reducing the use of resources and the consumption of energy.
The processing equipment for the small-diameter thin-wall spiral high-rib inner finned tube has the advantages of simple structure, small equipment and clamp size, easiness in operation and high reliability, and can be used for processing heat exchange tubes with relatively fixed sizes such as tube diameter, length and fin parameters as general parts of a cooler by combining a processing method, so that the standardized and batch production of the compressor cooler can be effectively realized.
Claims (7)
1. The utility model provides a small diameter thin wall spiral high rib finned tube processing equipment which characterized in that: comprises a power seat, a main workbench and a tail seat which are arranged on a frame body with a horizontal transverse guide rail in sequence,
the power seat is provided with a transversely arranged cutter bar driven by a stepping motor, the tail part of the cutter bar is provided with a cylindrical cutter head, the main workbench is provided with a supporting block for supporting the heat exchange tube and a half clamp group for clamping or loosening the heat exchange tube, and the tailstock is provided with an ejector rod for ejecting the cutter head during processing;
the power seat drives the power seat to reciprocate left and right through an eccentric wheel connected with a power transmission device and push plates on two sides of a rotating plane of the eccentric wheel, the eccentric wheel is connected with a rotating wheel through a pair of meshed bevel gears, the rotating wheel is connected with a screw rod through a grooved wheel uniformly distributed with a plurality of notches in the radial direction, and the main workbench is connected with the screw rod through a split nut on the lower part of the main workbench; and the main workbench and the tailstock are respectively provided with a locking device for locking the main workbench and the tailstock on the horizontal cross guide rail.
2. The small-diameter thin-wall spiral high-rib inner finned tube processing equipment as claimed in claim 1, wherein: the afterbody blade of tool bit is the even profile of tooth blade that disperses of claw type, the ejector pin head diminishes to be the tapering.
3. The small-diameter thin-wall spiral high-rib inner finned tube processing equipment as claimed in claim 2, wherein: the ejector rod is connected with the tailstock through a supporting block, an ejector rod adjusting screw used for adjusting the ejector rod to move transversely is arranged at the tail end of the ejector rod, and the ejector rod adjusting screw is arranged on the supporting block of the tailstock.
4. The small-diameter thin-wall spiral high-rib inner finned tube processing equipment as claimed in claim 3, wherein: the stepping motor, the cutter bar, the cutter head and the ejector rod are respectively provided with a plurality of parts which are longitudinally arranged on the power seat, the main workbench and the tailstock side by side.
5. The processing method of the small-diameter thin-wall spiral high-rib inner finned tube processing equipment as claimed in any one of claims 1 to 4, wherein the processing method comprises the following steps: the helical high-rib inner fins are processed in the heat exchange tube with the small diameter and the thin wall, the cutter head in the heat exchange tube is linearly fed to complete the gear shaping stroke, the cutter head rotates for an angle through a stepping motor after returning, meanwhile, the cutter head is closed and opened through a grooved pulley driving screw rod and a split nut in the returning process to control the heat exchange tube to perform unidirectional linear motion for a distance and then stops, the cutter head is fed again to complete the next gear shaping stroke, and the gear shaping stroke is repeated so as to complete the processing of all the helical high-rib inner fins in the heat exchange tube.
6. The processing method of the small-diameter thin-wall spiral high-rib inner finned tube processing equipment as claimed in claim 5, wherein the processing method comprises the following steps:
step A, tool adjustment: moving the power seat, the cutter bar and the cutter head to the right limit position together, moving the tailstock and the ejector rod to the left together to insert the front end of the ejector rod into an inner hole of the cutter head, continuously moving the tailstock and the ejector rod to the left to push a tapered inclined plane at the front end of the ejector rod to open a tooth-shaped cutting edge of the cutter head, measuring the external diameter size of the cutter head after opening, stopping moving the tailstock to the left when the parameter size of the required gear shaping is reached, recording the position parameter of the tailstock at the moment, and finishing the position adjustment of the cutter;
step B, tube loading: moving the power seat, the cutter bar and the cutter head to the left limit position, moving the tailstock and the ejector rod to the right together, separating the cutter head and the ejector rod to the position for loading the heat exchange tube, opening the split nut, moving the main workbench to the initial position of the gear shaping of the heat exchange tube, and fastening two ends of the heat exchange tube by using a half clamp group;
step C, gear shaping: moving the tailstock and the ejector rod to the left to the tailstock position recorded by the cutter adjustment, and locking the tailstock by using a locking device to make the tailstock immovable; then the opening and closing nut is closed to enable the main workbench and the screw rod to be meshed together, and the power seat is started to do reciprocating motion to start gear shaping of the heat exchange tube; when the power seat moves rightwards, the power seat is in a gear shaping stroke, the rotating wheel and the grooved wheel are in an unmeshed state, the screw rod is also in an unrotated state, and the main workbench is still; when the power seat moves leftwards, the power seat is in a return stroke without gear shaping, at the moment, the rotating wheel is meshed with the grooved wheel, the screw rod rotates, the main workbench moves leftwards in a unidirectional intermittent mode for a distance, and meanwhile, the stepping motor rotates for a step angle; when the power seat moves rightwards again, the next gear shaping stroke is completed, and the machining of the inner finned tube can be completed through the repeated operation.
7. The processing method of the small-diameter thin-wall spiral high-rib inner finned tube processing equipment as claimed in claim 6, wherein the processing method comprises the following steps: further comprising the step D of parameter adjustment: the grooved wheels with different groove numbers are changed to change the distance of the main worktable which moves towards the right in a unidirectional and intermittent way, thereby changing the tooth pitch; changing the angle degree of the stepping motor rotating by one step pitch so as to change the rotating angle of the inner fin; adjusting a mandril adjusting screw to control the compression degree of the mandril to the cutter head, namely adjusting the opening and closing degree of the tooth-shaped cutting edge of the cutter head so as to process fins with different heights; the cutter heads with different tooth numbers are changed to change the number of the inner finned tubes.
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| CN202110733974.0A CN113441795B (en) | 2021-06-30 | 2021-06-30 | Small-diameter thin-wall spiral high-rib inner finned tube machining equipment and machining method |
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| CN202110733974.0A CN113441795B (en) | 2021-06-30 | 2021-06-30 | Small-diameter thin-wall spiral high-rib inner finned tube machining equipment and machining method |
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| CN113441795B (en) | 2022-09-16 |
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