CN208408417U - Pipe threading machine is used in heat exchanger tube processing - Google Patents
Pipe threading machine is used in heat exchanger tube processing Download PDFInfo
- Publication number
- CN208408417U CN208408417U CN201820702824.7U CN201820702824U CN208408417U CN 208408417 U CN208408417 U CN 208408417U CN 201820702824 U CN201820702824 U CN 201820702824U CN 208408417 U CN208408417 U CN 208408417U
- Authority
- CN
- China
- Prior art keywords
- pipe
- hobboing cutter
- heat exchanger
- exchanger tube
- rest
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The utility model discloses a kind of heat exchanger tube processing pipe threading machines for processing large helix angle heat exchanger tube, it includes rack, it is equipped with feed pipe on the rack according to pipe conveying direction, guide roller, screw thread process mechanism, positioning plate, discharge pipe, it is characterized in that being equipped with the measuring motion of measurement pipe processing length above the guide roller, the screw thread process mechanism includes the pedestal being mounted on pipe threading machine, pedestal is equipped with the circumferential knife rest for being evenly arranged on pipe, the hobboing cutter that rotation is driven by power is equipped on knife rest, one of knife rest is follow rest, follow rest is equipped with the feed arrangement that the hobboing cutter depth of cut on follow rest is controlled to adjust by PLC, the utility model structure is simple, the pipe spiral angle of processing increases to 85 ° or more, inner wall height of projection is 0.16mm ~ 0.20mm, it can be quick Turbulence effect in reinforced pipe, and significantly rice pressure drop is not formed, while bore variable quantity is small, shock resistance vibration resistance is strong.
Description
Technical field
The utility model relates to a kind of heat exchanger tube process equipment, pipe threading machine is used in specifically a kind of heat exchanger tube processing.
Background technique
In Seawater Desalination Project equipment, large condenser, condenser, generally using titanium light pipe as heat exchanger tube.Titanium light
Pipe has many advantages, such as super corrosion-resistant, Ultrahigh Specific Strength, is the heat exchange tube material being uniquely widely recognized in marine engineering equipment.
Since two sides is smooth, in-pipe flow is not easy to form turbulent flow titanium light pipe, and heat utilization rate is low.Portion of techniques research uses can be effective
The pipeline of turbulence effect in managing is generated as heat exchanger tube, including screwed pipe, doubly-enhanced tubes etc., screwed pipe includes strengthening segment and light
Section, the pipe threading machine processing of screwed pipe strengthening segment passed through, each knife rest of existing pipe threading machine be it is fixed, knife rest is equipped with
Hobboing cutter, in use, the pipe that need to be processed is placed between each hobboing cutter, hobboing cutter is evenly arranged on the circumferential direction of pipe and connects in tube outer wall
Touching, transmission mechanism drive the rotation of each hobboing cutter, and each hobboing cutter, that is, frictionally drives pipe while being advanced axially relative around axial rotation,
Hobboing cutter can roll out thread groove on the outer wall of pipe.Its thread groove rolled is one-pass molding, this kind of equipment is suitble to process
Helical angle is no more than 45 ° of screwed pipe, and helical angle is no more than the mesh that 45 ° of screwed pipes are quickly generated turbulence effect to reach
, internal protrusion is generally more than 1mm, and making strengthening segment bore and two sides light pipe internal diameter difference is more than 5%.Such pipe exists
After enhanced tube, rice pressure drop increases considerably discovery in-pipe flow in test application, increment up to 50 ~ 100%, need it is higher at
This supercharger maintains being normally carried out for pressures cycle.Meanwhile such pipe, since the variable quantity of internal diameter is big, in large size
During equipment high speed water jet impact, light pipe and strengthening segment transition section are also easy to produce impact endurance test shock, become engineering, equipment safety
The risks and assumptions of stable operation.If process the screwed pipe of large helix angle with present equipment, because screw pitch is small, screw thread is enclosed in front and back two
Working interval is short, and the non-circular deformation of the previous circle dented bring pipe of screw thread process can be strong when next circle is then processed
Change this deformation, eventually leads to pipe overall deformation.
Summary of the invention
The purpose of the utility model is to provide a kind of heat exchanger tube processing pipe threading machines for processing large helix angle heat exchanger tube.
The utility model, which adopts the following technical scheme that, realizes its goal of the invention, and screwed pipe is used in a kind of processing of heat exchanger tube
Machine, it includes rack, according to pipe conveying direction be equipped on the rack feed pipe, guide roller, screw thread process mechanism, positioning plate,
Discharge pipe, the guide roller top are equipped with the measuring motion of measurement pipe processing length, the screw thread process mechanism packet
The pedestal being mounted on pipe threading machine is included, pedestal is equipped with the circumferential knife rest for being evenly arranged on pipe, is equipped on knife rest by power
The hobboing cutter of rotation is driven, one of knife rest is follow rest, and follow rest is equipped with to be controlled to adjust by PLC and roll on follow rest
The feed arrangement of the knife depth of cut.
Feed arrangement described in the utility model includes being mounted on the rack that follow rest can be driven in pipe radial direction
The feed motor of upper movement, follow rest side is equipped with the limiting device of hobboing cutter gradation feed on control follow rest, described
Limiting device includes rack-mounted fixing seat, and fixing seat is equipped with to be driven by transmission gear and move up in pipe radial direction
Dynamic thread spindle, thread spindle one end be equipped with drive transmission gear rotation stepper motor, the other end be equipped with it is upper close to switch, under connect
Nearly switch, fixing seat are equipped in measurement close to switch, the lower micrometer close to the position of the switch, it is upper close to switch, it is lower close to opening
The inserted sheet being mounted on follow rest is equipped between pass.
Measuring motion described in the utility model includes the encoder being mounted on above guide roller, encoder axis be equipped with
The corresponding code wheel of guide roller.
The adjustment seat for adjusting hobboing cutter and pipe angle is equipped between knife rest and hobboing cutter described in the utility model.
The utility model is the automatic reciprocating processing for realizing pipe, and the guide roller is driven by reversible electric machine.
Due to the adoption of the above technical scheme, the utility model preferably realizes goal of the invention, and structure is simple, processing
Pipe spiral angle increases to 85 ° or more, and inner wall height of projection is 0.16mm ~ 0.20mm, being capable of quick turbulent flow effect in reinforced pipe
It answers, and does not form significantly rice pressure drop, while bore variable quantity is small, shock resistance vibration resistance is strong.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of pipe threading machine；
Fig. 2 is the structural schematic diagram of limiting device；
Fig. 3 is the structural schematic diagram of guide roller and code wheel；
Fig. 4 is the structural schematic diagram of size reducing machine；
Fig. 5 is the structural schematic diagram of heat exchanger tube；
Fig. 6 is enlarged diagram at A in Fig. 5；
Fig. 7 is the structural schematic diagram of knife rest and follow rest.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and embodiments.
Embodiment 1:
By Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 it is found that it is a kind of strengthen titanium or titanium alloy heat exchanger tube processing method,
It the following steps are included:
(1) light pipe designs: selecting titanium or titanium alloy welded tube as base pipe 1, end face is vertical with pipe, and carries out unhairing
Thorn processing；Its outside weld reinforcement must not be higher than base material 0.05mm；It should be heat-treated after molding, welding, to eliminate in it
Stress, and tubing residual stress is controlled no more than 30MPa, 10MPa is not greater than along the fluctuation of pipe axial direction residual stress；Its
Outside diameter ovality is not greater than 1%；For its surface cleaning without greasy dirt, must not have depth is more than that the annular of 0.1mm scratches.
(2) microwave section is processed: by step, (1) the base pipe 1 is penetrated from the feed pipe 2 of pipe threading machine, is successively passed through
It after guide roller 3 and screw thread process mechanism 7, is positioned by positioning plate 9, the guide roller 3 is equipped with measurement 1 processing length of base pipe
Measuring motion, the screw thread process mechanism 7 includes the pedestal 21 that is mounted on pipe threading machine, and pedestal 21 is equipped with and is evenly arranged on
The circumferential knife rest 20 of pipe is equipped with the hobboing cutter 22 that rotation is driven by power on knife rest 20, and one of knife rest is mobile knife
Frame 23, follow rest 23 are equipped with the feed arrangement that 22 depth of cut of hobboing cutter on follow rest 23 is controlled to adjust by PLC11, processing
When, positioning plate 9 is removed, keeps base pipe 1 corresponding with discharge pipe 8, drives three hobboing cutters 22 to rotate by power, three hobboing cutters 22 lean on
Frictional force drives base pipe 1 to penetrate discharge pipe 8, and hobboing cutter 22 can process a complete thread groove on the outer wall of base pipe 1,
Its processing length is positioned by measuring motion, after reaching the processing length of setting, follow rest 23 is driven by feed arrangement,
The hobboing cutter 22 on follow rest 23 is set to exit Working position, base pipe 1 then under the guidance of guide roller 3, retracts initial position, carries out the
Secondary operation, before processing, feed arrangement adjusts the position of second of follow rest 23 processing according to required lower modulation, according to
The downward number of setting loops back and forth like this, until thread groove screw pitch, helical angle and thread groove inside pipe wall height of projection
Reach client's necessary requirement, pipe is pulled out to the processing that microwave section 32 can be completed from the discharge pipe 8 of pipe threading machine.
(3) light section 31 is processed: the base pipe 1 after (2) step is processed being fixed on the fixture 27 of size reducing machine 26, mold is pushed into
In, by way of extruding, the extruding of 1 outer end diameter of base pipe is contracted to outer diameter needed for client, light section 31 can be completed
Processing, the stopping when 1 microwave section of base pipe, 32 one end is pierced by mold 20mm make the outer of the changeover portion between light section 31 and microwave section 32
Diameter reaches the requirement of design.
(4) Length-fixing cutting: carrying out Length-fixing cutting for extra light section 31 and deburring handled, so that the light section 31 of pipe is long
Degree and total length meet the relative dimensions requirement of client.
(2) the feed arrangement includes being mounted in rack 10 that follow rest 23 can be driven in pipe to the utility model step
The feed motor 6 that son moves in the radial direction, 23 side of follow rest are equipped with 22 gradation feed of hobboing cutter on control follow rest 23
Limiting device 5, the limiting device 5 includes the fixing seat 15 that is mounted in rack 10, and fixing seat 15 is equipped with by speed change
Gear 13 drives the thread spindle 14 moved in the radial direction in pipe, and 14 one end of thread spindle, which is equipped with, drives the rotation of transmission gear 13
Stepper motor 12, the other end are equipped with close in measurement switch equipped with upper close switch 17, lower close switch 18, fixing seat 15
17, the lower micrometer 16 close to 18 position of switch is equipped between upper close switch 17, lower close switch 18 and is mounted on follow rest
Inserted sheet 19 on 23, the measuring motion include the encoder 25 for being mounted on the top of guide roller 3,25 axis of encoder be equipped with
The corresponding code wheel 4 of guide roller 3 is equipped with the adjustment seat for adjusting hobboing cutter 22 and pipe angle between the knife rest and hobboing cutter 22；
The guide roller 3 is driven by reversible electric machine 24；With moving up and down for follow rest 23, inserted sheet 19 triggers limiting device 5
It is upper close to switch 17 and lower close to switch 18, form limit signal；By adjusting the position of each knife rest and follow rest 23, make each
Hobboing cutter 22 on knife rest 20 and follow rest 23 touches 1 surface of base pipe, by adjusting the folder between each hobboing cutter 22 and base pipe 1
Angle, it is ensured that the trace that each hobboing cutter 22 rolls on pipe on a helix, adjustment after the completion of record at this time inserted sheet 19 thousand
Divide the position on ruler 16, by adjusting thread spindle 14, contacts lower close switch 18 with inserted sheet 19, complete the school of initial position
Just, when processing, positioning plate 9 is removed, keeps base pipe 1 corresponding with discharge pipe 8, thread spindle 14 is moved according to required lower modulation,
Make the position of upper close switch 17 on thread spindle 14, the lower processing for the first time of the adjustment close to switch 18, meanwhile, follow rest 23 leads to
It is mobile with trend pipe radial direction to cross feed motor 6, after inserted sheet 19 touches lower close switch 18, feed motor 6 stops
Work, meanwhile, drive three hobboing cutters 22 to rotate by power, three 22 frictionallies of hobboing cutter drive base pipe 1 to penetrate discharge pipe
8, hobboing cutter 22 can process a complete thread groove on the outer wall of base pipe 1, position it by code wheel 4 and encoder 25
Processing length, after reaching the processing length of setting, feed motor 6 works, and drives follow rest 23 mobile, makes follow rest 23
On hobboing cutter 22 exit Working position, when on follow rest 23 inserted sheet 19 and it is upper close to switch 17 contact when, stop working, base
Pipe 1 then under the guidance of guide roller 3, retracts initial position, carries out second and processes, and before processing, is moved according to required lower modulation
Dynamic thread spindle 14 makes the position of upper close switch 17 on thread spindle 14, lower second of the processing of adjustment close to switch 18, meanwhile,
Follow rest 23 is mobile with trend pipe radial direction by feed motor 6, after inserted sheet 19 touches lower close switch 18, into
Knife motor 6 stops working, and drives three hobboing cutters 22 to rotate by power, and three 22 frictionallies of hobboing cutter drive base pipe 1 to penetrate out
Pipe material 8, hobboing cutter 22 can carry out second on the thread groove that the first time of base pipe 1 processes and process, according to required downward
Number loops back and forth like this, until the screw pitch, helical angle and thread groove of thread groove reach client in the height of projection of 1 inner wall of base pipe
Pipe is pulled out the processing that microwave section 32 can be completed by necessary requirement from the discharge pipe 8 of pipe threading machine.
The wall thickness t of the utility model step (1) base pipe 1 is selected according to customer demand, 1 outer diameter of base pipe
It is calculate by the following formula:
D=D0× (1+ α)
Wherein, D is 1 outer diameter of base pipe, unit: mm
D0For customer demand product outer diameter,
α is to strengthen undergauge coefficient, and value range is 0.05 ~ 0.15；
The length L of the base pipe 1 is calculate by the following formula:
L=(L0-lLight× 2)+LInto+LOut+20
Wherein, L is 1 length dimension of base pipe, unit: mm
L0For customer demand product overall dimensions, unit: mm
lLightFor 31 length of product both ends light section of customer demand, unit: mm
LIntoFor in pipe threading machine, the distance of 22 Distance positioning plate 9 of hobboing cutter, if lLight≤ 130mm, then be typically chosen LInto=
150mm；If lLight> 130mm, then LInto=lLight+20mm；
LOutFor in pipe threading machine A, distance of the hobboing cutter 22 apart from guide roller 3A3, if lLight≤ 130mm, then be typically chosen LOut=
150mm；If lLight> 130mm, then LInto=LOut+20mm；
The screw pitch p of the step (2) thread groove is calculate by the following formula:
p=D0×π×tanμ0
Wherein: p is the screw pitch of 32 thread groove of product microwave section, unit: mm
D0For customer demand product outer diameter,
μ0For product screw processing angle, in the range of 1 ° ~ 2 °
(2) the thread groove is calculate by the following formula step in the height of projection h of inside pipe wall:
H=(D0- 2 × t) × γ
Wherein: h is product inner wall height of projection, unit: mm
D0For customer demand product outer diameter
γ is processing undergauge ratio, in the range of 0.7% ~ 1.5%.
Step (3) 29 section of die inlet end be it is tubaeform, 30 size of inner hole of mold is counted by following formula
It calculates:
DMould=D0-d1
Wherein: DMouldFor final 30 outer diameter of inner hole of mold B1, unit: mm
D0For the outer diameter of final products, unit: mm
d1For constant relevant to product wall thickness t, in the range of 0.2mm ~ 0.4mm
The arc radius R of the input end 29 of moldMouldIt is calculate by the following formula:
RMould=(D-DMould) * d2
Wherein: RMouldFor the arc radius of mold B1 input end 29, unit: mm
D is the outer diameter of base pipe 1, unit: mm
DMouldFor final 30 outer diameter of inner hole of mold B1, unit: mm
d2For constant relevant to product outer diameter D and wall thickness t, in the range of 2 ~ 7.
The utility model step lower close switch 18 that (2) limiting device 5 is determined by the position of inserted sheet 19 is initially fixed
Position position Co, the upper position close to switch 17 is C0- 2mm, the downward lower limit of thread spindle 14 are CBottom= C0+ (D-D0) * 0.5+
0.4mm, downward range are CBottom- C0, lower modulation △ C is set according to following requirement and lowers frequency n, it may be assumed that
Lower modulation △ C≤0.25mm
Lower frequency n=(CBottom- C0)/△ C, n are integer；
Angle μ of the step (2) between the hobboing cutter 22 and base pipe 1 is calculate by the following formula:
μ=arctan [p/(D* π)]
Wherein: angle of the μ between hobboing cutter 22 and base pipe 1, unit: °
P is the screw pitch of 32 thread groove of product microwave section, unit: mm
D is the outer diameter of base pipe 1, unit: mm
The length positioning L of the step (2) encoder 25ProcessingIt is calculate by the following formula:
LProcessing=L0-lLight×2-K
Wherein: LProcessingFor the position length of 3 encoder 25 of guide roller setting, unit: mm
L0For the total length of product, unit: mm
lLightFor the length of product two ends light section 31, unit: mm
K is constant relevant to the cutter revolving speed of pipe threading machine, 22 radius of hobboing cutter, withdrawing speed, in the range of 1 ~ 10；
The present embodiment needs converted products outer diameter D0=22.22mm, wall thickness t=0.5 mm, 32 numbers of microwave section are 1
Head, the angle of thread of helicla flute are 88.5 °, and pipe total length is 10m, and 31 length of light section is the heat exchanger tube of 50 mm, the present embodiment
It is h=0.16mm that processing undergauge ratio γ=0.7%, which calculates inside pipe wall height of projection according to formula,.
(1) light pipe designs: strengthen undergauge factor alpha=0.08 described in the present embodiment, is calculated according to formula, selection outer diameter D=
23.9mm, wall thickness are t=0.5mm, and for the high-quality titanium welding pipe of the mm of length L=10200 as base pipe 1,1 material of base pipe is pure titanium, board
Number be TA2；
(2) microwave section is processed: product screw processing angle μ described in the present embodiment0=1.5 °, lower modulation △ C=0.25 ㎜,
The cutter revolving speed of pipe threading machine, 22 radius of hobboing cutter, the relevant constant K of withdrawing speed are 5, according to formula calculate its screw pitch p=
1.8mm, angle μ=1.5 ° between hobboing cutter 22 and base pipe 1, the length positioning L of encoder 25Processing=9895 ㎜, base pipe 1 is from screw thread
It is penetrated in the feed pipe 2 of pipe machine, successively after guide roller 3 and screw thread process mechanism 7, is positioned by positioning plate 9, pass through tune
The position of whole each knife rest 20 and follow rest 23 makes the hobboing cutter 22 on each knife rest 20 and follow rest 23 touch 1 table of base pipe
Face adjusts the angle between each hobboing cutter 22 and base pipe 1 as required, it is ensured that the trace that each hobboing cutter 22 rolls on pipe is in a spiral shell
In spin line, position of the inserted sheet 19 on micrometer 16 is that x is connect under making by adjusting thread spindle 14 to record at this time after the completion of adjustment
Nearly switch 18 is contacted with inserted sheet 19, completes the correction of initial position, lower close to 18 initial position location C of switcho, i.e. Co=X, according to
Formula sets it and lowers lower limit as CBottomFrequency n=5 time are lowered in=x+1.24mm, setting；When processing, positioning plate 9 is removed, makes base pipe 1
It is corresponding with discharge pipe 8, so that thread spindle 14 is moved radially 0.25 ㎜ to base pipe 1 according to range parameter is lowered, it will be on thread spindle 14
It is upper close to switch 17, it is lower close to switch 18 be adjusted to for the first time processing position, meanwhile, pass through power drive three hobboing cutters 22
Rotation, three 22 frictionallies of hobboing cutter drive base pipe 1 to penetrate discharge pipe 8, and hobboing cutter 22 can process on the outer wall of base pipe 1
One complete thread groove, according to its processing length of the length positioning of logical encoder 25, after reaching the processing length of setting, into
Knife motor 6 works, and drives follow rest 23 mobile, so that the hobboing cutter 22 on follow rest 23 is exited Working position, work as follow rest
When inserted sheet 19 and upper close switch 17 on 23 contact, stop working, base pipe 1 then under the guidance of guide roller 3, retracts start bit
It sets, carries out second and process, before processing, so that thread spindle 14 is moved radially 0.25 ㎜ to base pipe 1 according to range parameter is lowered, make spiral shell
Upper close switch 17, the lower position for being adjusted to second of processing close to switch 18 on line axis 14, meanwhile, follow rest 23 passes through
Feed motor 6 is mobile with trend pipe radial direction, and after inserted sheet 19 touches lower close switch 18, feed motor 6 stops work
Make, drive three hobboing cutters 22 to rotate by power, three 22 frictionallies of hobboing cutter drive base pipe 1 to penetrate discharge pipe 8, hobboing cutter 22
Second can be carried out on the thread groove that the first time of base pipe 1 processes to process, loop back and forth like this 5 times, make the spiral shell of thread groove
Reach client's necessary requirement in the height of projection of 1 inner wall of base pipe away from, helical angle and thread groove, by pipe from the discharging of pipe threading machine
The processing that microwave section 32 can be completed is pulled out in pipeline 8.
(3) light section is processed: constant d relevant to product wall thickness t1=0.22 mm, it is relevant to product outer diameter D and wall thickness t normal
Number d2=3.68, calculating final 30 outer diameter of inner hole of mold according to formula is 22 mm, the arc radius R of the input end 29 of moldMould=
7mm, the base pipe 1 by after (2) step is processed are fixed on the fixture 27 of size reducing machine 26, are pushed away from the input end 29 of mold
Enter in mold inner hole 30, by way of extruding, the extruding of 1 outer end diameter of base pipe is contracted to outer diameter needed for client
The processing of light section 31 is completed, the stopping when 1 microwave section of base pipe, 32 one end is pierced by 28 outer 20mm of mold makes light section 31 and microwave section 32
Between the outer diameter of changeover portion reach the requirement of design；
(4) Length-fixing cutting: extra light section 31 is subjected to Length-fixing cutting and deburring is handled, so that the total length of pipe is
10m, light section 31 length in both ends is 50 mm.
A kind of reinforcing titanium or titanium alloy heat exchanger tube processed such as above-mentioned processing method, it includes tube body, and the outer diameter of tube body is
19.05mm ~ 25.4mm(the present embodiment is 22.22mm), wall thickness is that 0.4 mm ~ 0.6mm(the present embodiment is 0.5 mm)；Pipe
Body is equipped with light section 31, microwave section 32, and the microwave section 32 includes from the appearance of tube body by pipe threading machine towards in tube body
The wall recess that rolling is formed by several times, spacing of the recess between outer surface of tube body helical arrangement, adjacent trough are 1.8mm
~ 2.0mm, the helical angle of the recess are 88 ° ~ 89 ° (the present embodiment is 88.5 °), and 32 numbers of microwave section are 1, described
Recess protrusion inner wall makes to be formed on inner wall along the spiral-distributed raised line of inboard wall of tube body, and raised line height is 0.15mm ~ 0.20mm(sheet
Embodiment is 0.16 mm)；The changeover portion processed by size reducing machine 26 is equipped between the light section 31 and microwave section 32.
The difference of the wall thickness of the thickness d and tube body of recess described in the utility model is less than 0.05 mm, the thickness d of recess
0.45 mm。
Embodiment 2:
The present embodiment needs converted products outer diameter D0=19.05mm, wall thickness t=0.4 mm, 32 numbers of microwave section are 1
Head, the angle of thread of helicla flute are 88.2 °, and pipe total length is 6m, and 31 length of light section is the heat exchanger tube of 60mm, the present embodiment institute
It is h=0.2mm that processing undergauge ratio γ=1% stated, which calculates inside pipe wall height of projection according to formula,.
(1) light pipe designs: strengthen undergauge factor alpha=0.08 described in the present embodiment, is calculated according to formula, selection outer diameter D=
20.7mm, wall thickness are t=0.4mm, and for the high-quality titanium welding pipe of length L=6200mm as base pipe 1,1 material of base pipe is pure titanium, the trade mark
For TA2；
(2) microwave section is processed: product screw processing angle μ described in the present embodiment0=1.8 °, lower modulation △ C=0.21 ㎜,
The cutter revolving speed of pipe threading machine, 22 radius of hobboing cutter, the relevant constant K of withdrawing speed are 4, according to formula calculate its screw pitch p=
1.8mm, angle μ=1.6 ° between hobboing cutter 22 and base pipe 1, the length positioning L of encoder 25Processing=5876 ㎜, set according to formula
It is C that it, which lowers lower limit,BottomFrequency n=6 time are lowered in=x+1.23mm, setting；When processing, positioning plate 9 is removed, makes base pipe 1 and discharge nozzle
Road 8 is corresponding, so that thread spindle 14 is moved radially 0.21 ㎜ to base pipe 1 according to range parameter is lowered, will be upper close on thread spindle 14
Switch 17, the lower position for being adjusted to process for the first time close to switch 18, meanwhile, drive three hobboing cutters 22 to rotate by power, three
A 22 frictionally of hobboing cutter drives base pipe 1 to penetrate discharge pipe 8, hobboing cutter 22 can be processed on the outer wall of base pipe 1 one it is complete
Whole thread groove, according to its processing length of the length positioning of logical encoder 25, after reaching the processing length of setting, feed motor
6 work drive follow rest 23 mobile, so that the hobboing cutter 22 on follow rest 23 is exited Working position, when on follow rest 23
It when inserted sheet 19 and upper close switch 17 contact, stops working, base pipe 1 then under the guidance of guide roller 3, retracts initial position, carries out
Second of processing before processing, makes thread spindle 14 move radially 0.21 ㎜ to base pipe 1, makes thread spindle 14 according to range parameter is lowered
Upper close switch 17, the lower position for being adjusted to second of processing close to switch 18, meanwhile, follow rest 23 passes through feed electricity
Machine 6 is mobile with trend pipe radial direction, and after inserted sheet 19 touches lower close switch 18, feed motor 6 stops working, and passes through
Power drives three hobboing cutters 22 to rotate, and three 22 frictionallies of hobboing cutter drive base pipes 1 to penetrate discharge pipe 8, and hobboing cutter 22 can be
Second is carried out on the thread groove of the first time processing of base pipe 1 to process, and is looped back and forth like this 6 times, is made screw pitch, the spiral of thread groove
Angle and thread groove reach client's necessary requirement in the height of projection of 1 inner wall of base pipe, by pipe from the discharge pipe 8 of pipe threading machine
Pull out the processing that microwave section 32 can be completed.
(3) light section is processed: constant d relevant to product wall thickness t1=0.2mm, constant relevant to product outer diameter D and wall thickness t
d2=3.78, calculating final 30 outer diameter of inner hole of mold 28 according to formula is 18.85mm, the arc radius of the input end 29 of mold 28
RMould=7mm, the base pipe 1 by after (2) step is processed are fixed on the fixture 27 of size reducing machine 26, from the input end of mold 28
In 29 push-in mold inner holes 30, by way of extruding, the extruding of 1 outer end diameter of base pipe is contracted to outer diameter needed for client,
The processing that light section 31 can be completed, the stopping when 1 microwave section of base pipe, 32 one end is pierced by 28 outer 20mm of mold, makes light section 31 and microwave
The outer diameter of changeover portion between section 32 reaches the requirement of design；
(4) Length-fixing cutting: extra light section 31 is subjected to Length-fixing cutting and deburring is handled, so that the total length of pipe is
10m, light section 31 length in both ends is 50 mm.
A kind of reinforcing titanium or titanium alloy heat exchanger tube processed such as above-mentioned processing method, it includes tube body, and the outer diameter of tube body is
19.05mm ~ 25.4mm(the present embodiment is 19.05mm), wall thickness is that 0.4 mm ~ 0.6mm(the present embodiment is 0.4mm)；Pipe
Body is equipped with light section 31, microwave section 32, and the microwave section 32 includes from the appearance of tube body by pipe threading machine towards in tube body
The wall recess that rolling is formed by several times, spacing of the recess between outer surface of tube body helical arrangement, adjacent trough are 1.8mm
~ 2.0mm(the present embodiment is 1.8 mm), the helical angle of the recess is 88 ° ~ 89 ° (the present embodiment is 88.2 °), microwave section
32 numbers are 1, and the recess protrudes inner wall, make to be formed on inner wall along the spiral-distributed raised line of inboard wall of tube body, raised line height
It is 0.2 mm for 0.15mm ~ 0.20mm(the present embodiment)；It is equipped between the light section 31 and microwave section 32 and passes through size reducing machine 26
The changeover portion of processing.
The thickness d of the present embodiment recess is 0.36mm.
Remaining same embodiment 1.
Claims (6)
1. a kind of heat exchanger tube processing pipe threading machine, it includes rack, according to pipe conveying direction be equipped on the rack feed pipe,
Guide roller, screw thread process mechanism, positioning plate, discharge pipe, it is characterized in that being equipped with measurement tube to tubesheet above the guide roller
The measuring motion of length, the screw thread process mechanism include the pedestal being mounted on pipe threading machine, and pedestal is equipped with and is evenly arranged on
The circumferential knife rest of pipe is equipped with the hobboing cutter that rotation is driven by power on knife rest, and one of knife rest is follow rest, mobile
Knife rest is equipped with the feed arrangement that the hobboing cutter depth of cut on follow rest is controlled to adjust by PLC.
2. heat exchanger tube processing pipe threading machine according to claim 1, it is characterized in that the feed arrangement includes installation
The feed motor that follow rest can be driven to move in the radial direction in pipe on the rack, follow rest side are equipped with control movement
The limiting device of hobboing cutter gradation feed on knife rest, the limiting device include rack-mounted fixing seat, in fixing seat
Equipped with the thread spindle moved in the radial direction in pipe is driven by transmission gear, thread spindle one end, which is equipped with, drives transmission gear rotation
Stepper motor, the other end be equipped with it is upper close to switch, it is lower close to switch, fixing seat is equipped in measurement close to switch, lower close
The micrometer of the position of the switch, it is upper to be equipped with the inserted sheet being mounted on follow rest close to switch, between lower close switch.
3. heat exchanger tube processing pipe threading machine according to claim 1, it is characterized in that the measuring motion includes installation
Square encoder on a guide, encoder axis are equipped with code wheel corresponding with guide roller.
4. heat exchanger tube processing pipe threading machine according to claim 2, it is characterized in that the measuring motion includes installation
Square encoder on a guide, encoder axis are equipped with code wheel corresponding with guide roller.
5. heat exchanger tube processing pipe threading machine according to claim 1, it is characterized in that being set between the knife rest and hobboing cutter
There is the adjustment seat for adjusting hobboing cutter and pipe angle.
6. the processing pipe threading machine of heat exchanger tube described according to claim 1 or 2 or 3 or 4 or 5, it is characterized in that the guiding
Roller is driven by reversible electric machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820702824.7U CN208408417U (en) | 2018-05-11 | 2018-05-11 | Pipe threading machine is used in heat exchanger tube processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820702824.7U CN208408417U (en) | 2018-05-11 | 2018-05-11 | Pipe threading machine is used in heat exchanger tube processing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208408417U true CN208408417U (en) | 2019-01-22 |
Family
ID=65114466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820702824.7U Active CN208408417U (en) | 2018-05-11 | 2018-05-11 | Pipe threading machine is used in heat exchanger tube processing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208408417U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111408678A (en) * | 2020-02-28 | 2020-07-14 | 宾科汽车紧固件（昆山）有限公司 | Thread forming device and method |
| CN113715084A (en) * | 2020-12-29 | 2021-11-30 | 东莞通力塑胶制品有限公司 | Method for rotating knife edge to push rod |
-
2018
- 2018-05-11 CN CN201820702824.7U patent/CN208408417U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111408678A (en) * | 2020-02-28 | 2020-07-14 | 宾科汽车紧固件（昆山）有限公司 | Thread forming device and method |
| CN111408678B (en) * | 2020-02-28 | 2024-06-04 | 宾科汽车紧固件（昆山）有限公司 | Device and method for forming threads |
| CN113715084A (en) * | 2020-12-29 | 2021-11-30 | 东莞通力塑胶制品有限公司 | Method for rotating knife edge to push rod |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208408417U (en) | Pipe threading machine is used in heat exchanger tube processing | |
| CN101214523A (en) | Automatically coiling method for overlength sheath spring | |
| CN109940109A (en) | A kind of disconnecting device of compressor wire fixed-length blanking | |
| CN101462131B (en) | Method for manufacturing heat exchanger coil | |
| CN201988856U (en) | Spiral fin winding device | |
| CN201271664Y (en) | Aluminum circular tube sectorial diffluent hole spiral bridge hot extrusion die | |
| CN211135026U (en) | Intelligent automatic adjusting straightening machine for round pipes and round bars | |
| CN210413189U (en) | Automatic pipe welding equipment | |
| CN211218192U (en) | Take bending machine dabber device of dabber head detection | |
| CN204564813U (en) | Energy-saving appliance finned tube winding-machine bed | |
| US20010054665A1 (en) | Looping thick steel strip | |
| CN114082798A (en) | Production process and production device for outer wall spiral rib cladding tube | |
| CN205869173U (en) | Multifunctional pipe material machine -shaping equipment | |
| CN201058350Y (en) | Mould for shaping thin wall steel bobbin | |
| CN201410514Y (en) | Bonding pad roller for internally-supporting shaping device of spiral submerged arc welded pipe unit | |
| CN205869171U (en) | Pipe bending mechanism | |
| CN216324255U (en) | Spiral welded pipe processing equipment forming device | |
| CN219520050U (en) | Feeding device of stainless steel seamless tube cold drawing machine | |
| CN219025419U (en) | Wire drawing straighter device for small-diameter steel wire | |
| CN219130441U (en) | Processing equipment of special-shaped steel pipe | |
| CN115090739B (en) | Device for preparing thin-wall seamless tube by inward spinning | |
| CN220454472U (en) | Sheet metal part hole site gauge | |
| CN213915558U (en) | Thin-wall short pipe straightening device | |
| CN115338266B (en) | Cold rolling method for metal tube | |
| CN108555459A (en) | A kind of laser cutting device for incising pipes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |