CN103128354A - Eccentricity adjustment mechanism and handheld helical hole milling device thereof and helical hole milling method - Google Patents
Eccentricity adjustment mechanism and handheld helical hole milling device thereof and helical hole milling method Download PDFInfo
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- CN103128354A CN103128354A CN2013100373252A CN201310037325A CN103128354A CN 103128354 A CN103128354 A CN 103128354A CN 2013100373252 A CN2013100373252 A CN 2013100373252A CN 201310037325 A CN201310037325 A CN 201310037325A CN 103128354 A CN103128354 A CN 103128354A
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Abstract
The invention discloses an eccentricity adjustment mechanism, a handheld helical hole milling device of the eccentricity adjustment mechanism, and a helical hole milling method, and belongs to the technical field of flexible machining equipment. The eccentricity adjustment mechanism is used for eccentricity adjustment on a controlled device. The handheld helical hole milling device is used for milling a hole helically in a workpiece. The handheld helical hole milling device is regarded as the controlled device, the eccentricity adjustment mechanism can be used for the eccentricity adjustment of a cutter on the handheld helical hole milling device, and therefore the handheld helical hole milling device can be used for realizing the operation that different bore diameters can be machined through the one cutter. According to the eccentricity adjustment mechanism, the handheld helical hole milling device of the eccentricity adjustment mechanism, and the helical hole milling method, the structure is simple, the eccentricity adjustment is convenient, and the design difficulties and the overall weights of the eccentricity adjustment mechanism and the handheld helical hole milling device can be effectively lowered.
Description
Technical field
The invention discloses a kind of eccentric adjustable mechanism and hand-held helical milling device and method for helically milling hole
,Belong to flexible process unit technical field.
Background technology
With reference to United States Patent (USP) PCT/SE2008/050719, US2003/0143049, PCT/SE03/00467 and Chinese patent CN101633060A, CN101664821A, CN101786180A, CN102794491A etc., existing helical milling device generally comprises cutter self-rotating system, cutter revolution system, cutter axial feeding system and cutter deflection governor motion.The cutter deflection governor motion is the size of revolution radius when adjusting the cutter hole milling, and its degree of regulation will directly affect the machining accuracy of drilling.Due to cutter deflection governor motion eccentric being installed between the revolution system and self-rotating system of cutter normally, its mass eccentricity that causes tends to bring and adds the vibration problem in man-hour, especially at a high speed, during the ultrahigh speed hole milling.And the setting of eccentric adjustable mechanism also can make the helical milling device design become more complicated, and weight lays particular stress on, thereby makes the range of application that has limited helical milling device.Chinese patent CN1814409A discloses a kind of eccentricity regulating mechanism, but its complex structure, the eccentric adjusting that is directly used in helical milling device has certain difficulty.Patent of the present invention has obtained " Digit Control Machine Tool is special " funded projects.
Summary of the invention
The present invention is directed to existing eccentric adjustable mechanism complex structure, the helical milling device complete machine is laid particular stress on and the deficiency of the aspects such as complex structure, discloses a kind of eccentric adjustable mechanism simple to operate and hand-held helical milling device and method for helically milling hole.
A kind of eccentric adjustable mechanism is characterized in that: comprise housing, worm-wheel shaft, worm gear, worm screw, the 3rd drive motors, the first butt muff, the second butt muff; Described worm-wheel shaft is installed in described housing by bearing, and described worm gear is installed on worm-wheel shaft, and described worm screw is installed in housing and with worm gear by bearing and coordinates, and described the 3rd drive motors is fixed on housing, and its output shaft is connected mutually with worm screw one end; Described worm-wheel shaft one end stretch out housing and with coaxial being fixedly connected with of described the first butt muff; Described the second butt muff is positioned at outside the first butt muff, and is fixedly connected with housing; Has offset between the second butt muff and the first butt muff.
A kind of hand-held helical milling device of using described eccentric adjustable mechanism, it is characterized in that: this hand-held helical milling device comprises described eccentric adjustable mechanism, wherein be provided with N the first alignment pin on first butt muff (1006) of eccentric adjustable mechanism, be provided with M the second alignment pin (1007-1) on the second butt muff; Described hand-held helical milling device comprises combination gun barrel (2001); Be divided into front gun barrel (2001-1) and rear gun barrel (2001-2) by central dividing plate in combination gun barrel (2001); Axial feed slide block (2007) is installed in rear gun barrel (2001-2), and the axial feed slide block is provided with lead on (2007), is provided with the gathering sill that coordinates with lead on rear gun barrel (2001-2); By sliding bearing (2020), revolution housing (2009) is installed in front gun barrel (2001-1); In the central dividing plate of combination gun barrel (2001), transmission nut (2003) is installed; Hollow screw mandrel (2004) is installed in transmission nut (2003), and hollow screw mandrel (2004) rear end is installed on axially in slide block (2007) by upper bearing (metal) (2005); Be fixed wtih the first drive motors (2006) on axial feed slide block (2007), the output shaft of the first drive motors (2006) is connected with hollow screw mandrel (2004) rear end; Revolution housing (2009) rear end and hollow screw mandrel (2004) front end are connected, and revolution housing (2009) front end is fixed with the 3rd end cap (2013), and the 3rd end cap has eccentric orfice on (2013); With eccentric manner, the rotation assembly is installed in revolution housing (2009), the second end cap (2011) that the rotation assembly comprises the second drive motors (2012), is connected mutually with the second drive motors (2012); The second end cap front portion has the axle journal of going out (2011-1), go out axle journal (2011-1) and stretch out the 3rd fixing eccentric orfice on end cap (2013), and make the second end cap and the 3rd end cap (2013) locking by the fastening screw nut (2014) that is installed on out on axle journal (2011-1); The second drive motors (2012) output shaft stretches out axle journal and connects successively knife bar (2015), cutter (2016); Be provided with M the locating hole (2013-2) corresponding with second alignment pin (1007-1) of eccentric adjustable mechanism on the 3rd end cap (2013); Also be provided with the N bar deep-slotted chip breaker corresponding with the first alignment pin of eccentric adjustable mechanism on the 3rd end cap around eccentric orfice; Also be provided with the N corresponding with the first alignment pin of an eccentric adjustable mechanism guide-localization bolt on the end face of the second end cap around going out axle journal, guide-localization bolt (2018) just in time passes deep-slotted chip breaker; Above-mentioned rear gun barrel below also is equipped with handle; Above-mentioned front gun barrel front end also is equipped with and supports the chip removal cover, supports on the chip removal cover chip discharging tube also is installed.
The method for helically milling hole of described hand-held helical milling device is characterized in that comprising following process:
The first step is adjusted to original state with eccentric adjustable mechanism (100), and namely the eccentric adjusting amount is zero; According to treating drilling diameter and cutter for same, determine that the 3rd drive motors (1002) carries out the controlled quentity controlled variable of eccentric adjusting; Second step, utilize eccentric adjustable mechanism (100) to adjust the rotation assembly of hand-held helical milling device (200) and the eccentric throw between revolution housing (2009), detailed process is as follows: at first, unload lower support chip removal cover (2010), unclamp fastening screw nut (2014) and guide-localization bolt (2018), make the second end cap (2011) can drive the rotation assembly and rotate in the revolution housing; Secondly, the second alignment pin (1007-1) on second butt muff (1007) of eccentric adjustable mechanism (100) is inserted the upper locating hole (2013-2) of the 3rd end cap (2013); Rotate the second end cap (2011) front portion and go out axle journal (2011-1), make the first alignment pin (1006-1) on the first butt muff (1006) to the upper bolt (2018) of upper the second end cap (2011); Tighten a little fastening screw nut (2014), the upper outside centre bore of bolt (2018) of the first alignment pin (1006-1) insertion the second end cap (2011) on the first butt muff (1006) is got final product; Then, start the 3rd drive motors (1002), support (1006) by worm screw (1003), worm gear (1004), worm-wheel shaft (1005), the first docking, drive second fixedly end cap (2011) and the second drive motors (2012) revolve round the sun housing relative to cutter (1016) (2009) be rotated, be threaded to corresponding eccentric position; At last, locking fastening screw nut (2014) takes off eccentric adjuster (100), and fastening guide-localization bolt (2018) is completed relatively the revolve round the sun eccentric adjusting of housing (2009) of cutter (1016); In the 3rd step, during hole milling, at first load onto and support chip removal cover (2010), by supporting chip removal cover workpiece pressing; Then the second drive motors (2012) starts, the rotation of band cutter (2016), the first drive motors (2006) also starts simultaneously, by hollow screw mandrel (1004) and transmission nut (1003), drive revolution housing (1009) and cutter (1016) and carry out axial feed and revolution motion, thereby realize helical milling.
For composition structure and the complete machine weight of simplifying controlled device, independent design of the present invention a kind of simple eccentric adjustable mechanism, alignment pin one by eccentric adjustable mechanism, alignment pin two respectively with the interconnecting of the fixed part of controlled device, rotatable parts, drive successively worm gear, worm screw, worm-wheel shaft, the first butt muff and alignment pin one, the second butt muff and alignment pin two by the 3rd drive motors, just can realize the precision adjustment of the relative fixed part bias of moving component of controlled device.
In order to reduce the design weight of helical milling device, the invention discloses a kind of hand-held helical milling device of avoiding carrying eccentric adjustable mechanism.Before hole milling, the hand-held helical milling device is connected with eccentric adjustable mechanism, according to cutter and the size for the treatment of aperture, regulates the eccentric size of milling device clamping cutter, then takes off eccentric adjustable mechanism; During hole milling, the first drive motors drives the revolution housing rotary by the hollow screw mandrel, is arranged on because of the second drive motors bias that connects cutter on the fixedly end cap two of revolution housing, thereby realizes helical milling.
Described hand-held helical milling device is characterized in that: the distance of described M second alignment pin distance the second butt muff central axis equates and evenly distributes along circumferential; The distance at M locating hole distance the 3rd end cap eccentric orfice center equates and along circumferentially evenly distributing.Like this simple for structure.
Described hand-held helical milling device is characterized in that: the distance of described N first alignment pin distance the first butt muff central axis equates and circumferentially evenly distribution of edge; Described N bar deep-slotted chip breaker is positioned at eccentric orfice center take the 3rd end cap on the same circle in the center of circle and along circumferentially evenly distributing; Described N guide-localization bolt equates and evenly distributes along circumferential apart from the distance that the second end cap goes out the axle journal central axis.Like this simple for structure.
Description of drawings
Fig. 1 is the structural representation according to the hand-held helical milling device one better case study on implementation of eccentricity regulation structure of the present invention and application eccentric adjustable mechanism;
Fig. 2 is the structural representation of eccentricity regulation structure of the present invention;
Fig. 3 is eccentric adjustable mechanism eccentric adjusting principle schematic of the present invention;
Fig. 4 is the internal structure cutaway view of hand-held helical milling device of the present invention;
Fig. 5 is that Fig. 4 sheds the left view that supports the chip removal cover;
Fig. 6 is the three-dimensional model diagram of fixedly end cap two of the present invention;
Fig. 7 is that milling device of the present invention docks schematic diagram with eccentric adjuster;
number in the figure title: 100, eccentric adjustable mechanism, 1001, housing, the 1002, the 3rd drive motors, 1003, worm screw, 1004, worm gear, 1005, worm-wheel shaft, 1006, docking back-up block one, 1006-1, alignment pin one, 1007, docking back-up block two, 1007-1, alignment pin two, the cylindrical center of O1, the first butt muff, O2, the second butt muff cylindrical center, the radial deflection amount of e, the first butt muff cylindrical and the second butt muff cylindrical, 200, milling device, 2001, the combination gun barrel, 2001-1, front gun barrel, 2001-2, rear gun barrel, 2002, handle, 2003, transmission nut, 2004, the hollow screw mandrel, 2005, bearing, 2006, the first drive motors, 2007, the feeding slide block, 2008, fixedly end cap one, 2009, the revolution housing, 2010, support the chip removal cover, 2010-1, the chip removal pipeline, 2011, fixedly end cap two, 2011-1, stretch out axle journal, 2011-2, butt end, 2012, the second drive motors, 2013, fixedly end cap three, 2013-1, deep-slotted chip breaker, 2013-2, locating hole, 2014, fastening screw nut, 2015, knife bar, 2016, cutter, 2017, the axis of guide and pointer, 2018, the guide-localization bolt, 2019, set bolt two, 2020, sliding bearing, 2021, the scale platform, 2022, bearing (ball) cover.
The specific embodiment
Be described in detail below in conjunction with accompanying drawing and the hand-held helical milling device of concrete embodiment to eccentric adjustable mechanism of the present invention and application eccentric adjustable mechanism.
Shown in Figure 1, the hand-held helical milling device of a kind of eccentric adjustable mechanism disclosed by the invention and application eccentric adjustable mechanism, this eccentric adjustable mechanism 100 is used for the eccentric adjusting of controlled device; Hand-held helical milling device 200 is used for the helical milling of workpiece, for the processing of different pore size, can use eccentric adjustable mechanism 100 to adjust the eccentric size of hand-held helical milling device 200 clamping cutters.
Shown in Figure 2, described eccentric adjustable mechanism 100 mainly is comprised of housing 1001, the 3rd drive motors 1002, worm screw 1003, worm gear 1004, worm-wheel shaft 1005, the first butt muff 1006, the second butt muff 1007 etc.Be fixed on the 3rd drive motors 1003 on housing 1001 end faces, its output shaft is connected to worm screw 1003; The worm gear 1004 that matches with worm screw 1003 is sleeved on the worm-wheel shaft 1005 of housing 1001; Worm-wheel shaft 1,005 one ends pass housing 1001 and second butt muff 1007 is coaxial is connected; The first butt muff 1006 that is sleeved on second butt muff 1007 outsides is connected with housing 1001 sides, and there are certain offset in the first butt muff 1006 cylindricals and the second butt muff 1007 cylindricals; The first butt muff 1006 is provided with three alignment pin one 1006-1, three alignment pin one 1006-1 be distributed on one with the concentric circle of the first butt muff 1006 cylindricals on; Also be provided with three alignment pin two 1007-1 on the second butt muff 1007, three alignment pin two 1007-1 be distributed on one with the concentric circle of the second butt muff 1007 cylindricals on; Three alignment pin one 1006-1 insert in a certain fixed part of controlled device (not shown in FIG.), and three alignment pin two 1007-1 insert in a certain moving component of controlled device (not shown in FIG.).
Shown in Fig. 4,5,6,7, described hand-held helical milling device 200 mainly comprises combination gun barrel 2001, handle 2002, supports chip removal cover 2010, transmission nut 2003, hollow screw mandrel 2004, the first drive motors 2006, feeding slide block 2007, fixedly end cap 1, the housing 2009 that revolves round the sun, fixedly end cap 2 2011, the second drive motors 2012, fixedly end cap 3 2013, fastening screw nut 2014, knife bar 2015, cutter 2016.Be provided with the combination gun barrel 2001 of central dividing plate and be comprised of the front gun barrel 2001-1 of co-axial interconnect, rear gun barrel 2001-2, be circumscribed with handle 2002 below rear gun barrel 2001-2, rear gun barrel 2001-2 right-hand member is provided with to show the scale platform 2021 of axial feed; Front gun barrel 2001-1 left end is threaded connection one and supports chip removal cover 2010, supports chip removal cover 2010 and is provided with a chip discharging tube 2010-1; Be contained in the transmission nut 2003 on combination gun barrel 2001 central dividing plates and be inserted with a hollow leading screw 2004; Hollow screw mandrel 2004 right-hand members pass feeding slide block 2007 upper bearing (metal)s 2005 and connect the first drive motors 2006, the first drive motors 2006 and be installed into on slide block 2007 by fixing end cap 1, and feeding slide block front and back sides is equipped with the axis of guide 2017 with pointer; Hollow screw mandrel 2004 by the left end flange be arranged on front gun barrel on revolution housing 2009 right sides in sliding bearing 2020 be connected; In revolution housing 2009 left end eccentric inner holes, fixedly end cap 2 2011 is housed; Fixedly end cap 2 2011 left ends go out axle journal 2011-1 and pass fixedly end cap 3 2013 on revolution housing 2009 end faces, and a fastening screw nut 2014 is housed;
The second one of eccentric installation in drive motors 2012 left sides is end cap 2 2011 fixedly, and its output shaft is end cap 2 2011 centre bores fixedly, are connected to successively knife bar 2015, cutter 2016; Fixedly end cap 3 2013 is provided with three deep-slotted chip breaker 2013-1 and an eccentric centre bore, article three, deep-slotted chip breaker 2013-1 be distributed on eccentric centre bore around, three guide-localization bolts 2018 that are distributed on end cap 2 2011 left sides pass respectively three deep-slotted chip breaker 2013-1.
The operation principle of the hand-held helical milling device of eccentric adjustable mechanism of the present invention and application eccentric adjustable mechanism is as follows:
When eccentric adjustable mechanism carried out eccentric adjusting, at first alignment pin one 2006-1 with the first butt muff 2006 inserted in a certain fixed part of controlled device, and alignment pin two 2007-1 of the second butt muff 2007 insert in a certain moving component of controlled device; Then, the 3rd drive motors 1002 drives the moving component of controlled device by worm screw 1003, worm gear 1004, worm-wheel shaft 1005, the second butt muff 1006 and the first alignment pin 1007, completes the eccentric adjusting of relative fixed part.The operation principle of eccentric adjustable mechanism as shown in Figure 3.
During the drilling of hand-held helical milling device, mainly be divided into for three steps:
The first step is adjusted to original state with eccentric adjustable mechanism 100, and namely the eccentric adjusting amount is zero; According to treating drilling diameter and cutter for same, determine that the 3rd drive motors 1002 carries out the controlled quentity controlled variable of eccentric adjusting;
Second step, utilize eccentric adjustable mechanism 100 to adjust the rotation assembly of hand-held helical milling device 200 and the eccentric throw between revolution housing 2009, detailed process is as follows: at first, unload lower support chip removal cover 2010, unclamp fastening screw nut 2014 and guide-localization bolt 2018, make the second end cap 2011 can drive the rotation assembly and rotate in housing in revolution and get final product; Secondly, the second alignment pin 1007-1 on the second butt muff 1007 of eccentric adjustable mechanism 100 is inserted locating hole 2013-2 on the 3rd end cap 2013; Rotate the second end cap 2011 front portions and go out axle journal 2011-1, make the first alignment pin 1006-1 on the first butt muff 1006 to bolt 2018 on upper the second end cap 2011; Tighten a little fastening screw nut 2014, make the first alignment pin 1006-1 on the first butt muff 1006 insert that on the second end cap 2011, the outside centre bore of bolt 2018 gets final product; Then, start the 3rd drive motors 1002, by worm-drive, drive second fixedly end cap 2011 and the second drive motors 2012 revolution relative to cutter 1016 housing 2009 be rotated, be threaded to corresponding eccentric position; At last, locking fastening screw nut 2014 takes off eccentric adjuster 100, and fastening guide-localization bolt 2018 is completed cutter 1016 eccentric adjusting of revolution housing 2009 relatively; At last, locking fastening screw nut 2014 takes off eccentric adjuster 100, and fastening guide-localization bolt 2018 is completed cutter 1016 eccentric adjusting of revolution housing 2009 relatively;
In the 3rd step, during hole milling, at first load onto the support chip removal cover 2010 of helical milling device 200 front ends, by supporting chip removal cover 2010 workpiece pressings; Then the second drive motors 2012 starts, rotation occurs in band cutter 2016, and the first drive motors 2006 also starts simultaneously, by hollow screw mandrel 1004 and transmission nut 1003, drive revolution housing 1009 and cutter 1016 and carry out axial feed and revolution motion, thereby realize helical milling.
The above only is the eccentric adjustable mechanism that the present invention relates to and a better case study on implementation using the hand-held helical milling device of eccentric adjustable mechanism, but practical range of the present invention is not limited to this example.
Claims (5)
1. eccentric adjustable mechanism is characterized in that:
Comprise housing (1001), worm-wheel shaft (1005), worm gear (1004), worm screw (1003), the 3rd drive motors (1002), the first butt muff (1006), the second butt muff (1007);
Described worm-wheel shaft (1005) is installed in described housing (1001) by bearing, described worm gear (1004) is installed on worm-wheel shaft (1005), described worm screw (1003) is installed in housing (1001) and coordinates with worm gear (1004) by bearing, described the 3rd drive motors (1002) is fixed on housing (1001), and its output shaft is connected mutually with worm screw (1003) one ends;
Described worm-wheel shaft (1005) one ends stretch out housing (1001) and with coaxial being fixedly connected with of described the first butt muff (1006); Described the second butt muff (1007) is positioned at outside the first butt muff (1006), and is fixedly connected with housing (1001); Has offset between the second butt muff (1007) and the first butt muff (1006).
2. an application rights requires the hand-held helical milling device of 1 described eccentric adjustable mechanism, it is characterized in that:
This hand-held helical milling device comprises described eccentric adjustable mechanism, wherein be provided with N the first alignment pin (1006-1) on first butt muff (1006) of eccentric adjustable mechanism, be provided with M the second alignment pin (1007-1) on the second butt muff (1007);
Described hand-held helical milling device (200) comprises combination gun barrel (2001); Be divided into front gun barrel (2001-1) and rear gun barrel (2001-2) by central dividing plate in combination gun barrel (2001); Axial feed slide block (2007) is installed in rear gun barrel (2001-2), and the axial feed slide block is provided with lead on (2007), is provided with the gathering sill that coordinates with lead on rear gun barrel (2001-2); By sliding bearing (2020), revolution housing (2009) is installed in front gun barrel (2001-1);
In the central dividing plate of combination gun barrel (2001), transmission nut (2003) is installed; Hollow screw mandrel (2004) is installed in transmission nut (2003), and hollow screw mandrel (2004) rear end is installed on axially in slide block (2007) by upper bearing (metal) (2005); Be fixed wtih the first drive motors (2006) on axial feed slide block (2007), the output shaft of the first drive motors (2006) is connected with hollow screw mandrel (2004) rear end;
Revolution housing (2009) rear end and hollow screw mandrel (2004) front end are connected, and revolution housing (2009) front end is fixed with the 3rd end cap (2013), and the 3rd end cap has eccentric orfice on (2013);
With eccentric manner, the rotation assembly is installed in revolution housing (2009), the second end cap (2011) that the rotation assembly comprises the second drive motors (2012), is connected mutually with the second drive motors (2012); The second end cap (2011) front portion has the axle journal of going out (2011-1), go out axle journal (2011-1) and stretch out the 3rd fixing eccentric orfice on end cap (2013), and make the second end cap (2011) and the 3rd end cap (2013) locking by the fastening screw nut (2014) that is installed on out on axle journal (2011-1); The second drive motors (2012) output shaft stretches out axle journal (2011-1) and connects successively knife bar (2015), cutter (2016);
Be provided with M the locating hole (2013-2) corresponding with second alignment pin (1007-1) of eccentric adjustable mechanism on the 3rd end cap (2013);
The 3rd end cap (2013) is upper also is provided with the N bar deep-slotted chip breaker (2013-1) corresponding with first alignment pin (1006-1) of eccentric adjustable mechanism on every side at eccentric orfice; Also be provided with N the guide-localization bolt (2018) corresponding with first alignment pin (1006-1) of eccentric adjustable mechanism on every side going out axle journal (2011-1) on the end face of the second end cap (2011), guide-localization bolt (2018) just in time passes deep-slotted chip breaker (2013-1);
Above-mentioned rear gun barrel (2001-2) below also is equipped with handle (2002); Above-mentioned front gun barrel (2001-1) front end also is equipped with and supports chip removal cover (2010), supports on chip removal cover (2010) chip discharging tube (2010-1) also is installed.
3. hand-held helical milling device according to claim 2 is characterized in that: the distance of described M the second alignment pin (1007-1) distance the second butt muff (1007) central axis equates and along circumferentially evenly distributing; The distance at M locating hole (2013-2) distance the 3rd end cap (2013) eccentric orfice center equates and evenly distributes along circumferential.
4. hand-held helical milling device according to claim 2 is characterized in that: described N the first alignment pin (1006-1) equates and along circumferentially evenly distributing apart from the distance of the first butt muff (1006) central axis; Described N bar deep-slotted chip breaker (2013-1) is positioned at eccentric orfice center take the 3rd end cap (2013) on the same circle in the center of circle and along circumferentially evenly distributing; Described N guide-localization bolt (2018) equates and evenly distributes along circumferential apart from the distance that the second end cap (2011) goes out axle journal (2011-1) central axis.
5. the method for helically milling hole of hand-held helical milling device according to claim 2 is characterized in that comprising following process:
The first step is adjusted to original state with eccentric adjustable mechanism (100), and namely the eccentric adjusting amount is zero; According to treating drilling diameter and cutter for same, determine that the 3rd drive motors (1002) carries out the controlled quentity controlled variable of eccentric adjusting;
Second step utilizes eccentric adjustable mechanism (100) to adjust the rotation assembly of hand-held helical milling device (200) and the eccentric throw between revolution housing (2009), and detailed process is as follows:
At first, unload lower support chip removal cover (2010), unclamp fastening screw nut (2014) and guide-localization bolt (2018), make the second end cap (2011) can drive the rotation assembly and rotate in the revolution housing;
Secondly, the second alignment pin (1007-1) on second butt muff (1007) of eccentric adjustable mechanism (100) is inserted the upper locating hole (2013-2) of the 3rd end cap (2013); Rotate the second end cap (2011) front portion and go out axle journal (2011-1), make the first alignment pin (1006-1) on the first butt muff (1006) to the upper bolt (2018) of upper the second end cap (2011); Tighten a little fastening screw nut (2014), the upper outside centre bore of bolt (2018) of the first alignment pin (1006-1) insertion the second end cap (2011) on the first butt muff (1006) is got final product;
Then, start the 3rd drive motors (1002), support (1006) by worm screw (1003), worm gear (1004), worm-wheel shaft (1005), the first docking, drive second fixedly end cap (2011) and the second drive motors (2012) revolve round the sun housing relative to cutter (1016) (2009) be rotated, be threaded to corresponding eccentric position;
At last, locking fastening screw nut (2014) takes off eccentric adjuster (100), and fastening guide-localization bolt (2018) is completed relatively the revolve round the sun eccentric adjusting of housing (2009) of cutter (1016);
In the 3rd step, during hole milling, at first load onto and support chip removal cover (2010), by supporting chip removal cover workpiece pressing; Then the second drive motors (2012) starts, the rotation of band cutter (2016), the first drive motors (2006) also starts simultaneously, by hollow screw mandrel (1004) and transmission nut (1003), drive revolution housing (1009) and cutter (1016) and carry out axial feed and revolution motion, thereby realize helical milling.
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