KR101244195B1 - Marine propeller processing device - Google Patents

Abstract

The ship propeller processing apparatus for ships of this invention is equipped with a propeller to rotate in a circumferential direction; A rotary table index unit for controlling a rotation angle of the rotary table; A main gear box having a drive device for driving the rotary table in the circumferential direction; A base having a lining plate that gently rotates the propeller and the rotary table and simultaneously supports the rotary table and the propeller; A cross rail installed on an upper side of the base; Columns disposed on both sides of the base to support the crossrails; Blade milling ram heads for blade processing of propellers; Boss boring ram head for boss processing of propellers; Hydraulic system connected to each functional unit; including, but the blade milling ram head and boss boring ram head is mounted on the cross-rail at the same time, cross-rail for smooth horizontal and vertical movement of the blade milling ram head and boss boring ram head And a plurality of horizontal feed units and vertical feed units are mounted on the heads, and the cross rails are deflected on the cross rails to prevent the cross rails from sagging due to the weight load of the blade milling ram head and the boss boring ram head. It is characterized by further configuring the compensation device. According to this, a plurality of ram heads, that is, a blade milling ram head for blade processing of the propeller and a boss boring ram head for boss processing of the propeller, are simultaneously installed on the cross rail, so that the propeller is machined through electronic control in one device. All the processes can be performed to reduce the machining process, thereby reducing the working time, there is an advantage that the productivity of the ship propeller can be increased by improving the efficiency of the work.

Description

Marine propeller processing equipment {MARINE PROPELLER PROCESSING DEVICE}

The present invention relates to a ship propeller processing apparatus, and more particularly to a ship propeller processing apparatus capable of simultaneous processing of the blade and the boss of the ship propeller.

In general, a ship propeller is composed of a blade and a boss located in the center of the propeller.

As an apparatus for processing such a propeller for ships, the vertical lathe apparatus with the turning function for exclusively processing the boss of a propeller, and the 5-axis processing apparatus for exclusively processing a blade are used.

Conventionally, in order to process marine propellers, the bosses and blades of the propellers were processed in separate processes using respective processing apparatuses for the bosses and blades described above. That is, the boss of the propeller was processed by the vertical lathe apparatus which has the turning function dedicated to boss processing, and the blade of the propeller was processed using the 5-axis processing apparatus dedicated to blade processing.

Therefore, in order to process the propeller, the processing using a dedicated processing device according to the portion of the propeller, the processing time is long, there is a problem that the working efficiency is lowered, and as a result there is a problem that the productivity of the propeller is lowered.

Therefore, the problem to be solved by the present invention is to provide a propeller processing apparatus for ships that can continuously execute the boss and blade processing of the propeller in one device.

Marine propeller processing apparatus according to an embodiment of the present invention for solving the above problems is a rotary table mounted to the propeller to rotate in the circumferential direction; A rotary table index unit for controlling a rotation angle of the rotary table; A main gear box having a drive device for driving the rotary table in the circumferential direction; A base having a lining plate that gently rotates the propeller and the rotary table and simultaneously supports the rotary table and the propeller; A cross rail installed on an upper side of the base; Columns disposed at both sides of the base to support the crossrails; A blade milling ram head for blade processing of the propeller; A boss boring ram head for boss processing of the propeller; A hydraulic system connected to each functional unit, wherein the blade milling ram head and the boss boring ram head are simultaneously mounted on the crossrail, and smooth horizontal and vertical of the blade milling ram head and the boss boring ram head. A plurality of horizontal feed units and vertical feed units are mounted on the crossrail and the heads for movement and to prevent sagging of the crossrail due to the weight load of the blade milling ram head and the boss boring ram head. In order to further configure the cross-rail deflection compensation device on the cross rail.

The crossrail deflection compensation device may include a vertical reinforcement beam and a horizontal reinforcement beam installed and fixed to the upper portion of the crossrail.

The rotary table, the inner table, the outer table arranged to the outer side of the inner table, circular ribs and radial ribs to prevent deformation and vibration during cutting operation, to change the chucking direction according to the number of blades of the propeller It may be composed of a radial T groove and a circular T groove disposed on the upper surface of the inner table.

The rotary table index unit, a gear box disposed on one side of the base, a gear device composed of a worm and a worm wheel and gears assembled in the gear box, mounted on the outside of the gear box and connected to the gear device A sub-motor for driving a gear device, a pinion connected to the rotary table to transfer power of the gear device to a master gear of the rotary table, between gears of the gear device and between the pinion and the master gear And a backlash removal device for removing backlash between the gears and between the pinion and the master gear.

The blade milling ram head is connected to the horizontal feed unit, horizontal saddles horizontally moved on the crossrail, swivel saddles disposed in front of the horizontal saddles, rams mounted on the swivel saddles, and on one side of the swivel saddles. A swivel system disposed to rotate and drive the swivel saddle, a milling head mounted to the bottom of the ram, a spindle drive mounted to one side of the milling head, and mounted to the milling head below the spindle drive to drive the spindle drive. A sub-motor, mounted on the other side of the milling head and driven in connection with the spindle drive, includes an attachment for machining of a propeller blade, a plane, an inclined surface, an overlapping portion, and the like, wherein the ram is cut during cutting. It is configured in a square shape to withstand enough The swivel system may rotate the swivel saddle in the range of ± 21.6 degrees.

The attachment is configured to clamp the milling tool in both directions, and may include an oil cooling device for heat generation during cutting.

The boss boring ram head is a spindle, a gearbox having a plurality of gears connected to the spindle, a spindle motor connected to the gears in the gearbox to rotate the spindle, a tool clamping device mounted vertically in the center, the Horizontal saddles connected to a horizontal feed unit and horizontally moved on the crossrail, vertical saddles disposed in front of the horizontal saddles, rams disposed in the vertical saddles for vertical movement of the boss boring ram head, and a bottom of the ram And tool holders for internal machining and drilling, tapping, and end milling of propeller bosses.

Each of the blade milling ram head and the boss boring ram head is disposed on both sides of the ram to be connected to the hydraulic system, and to compensate for the vertical load caused by the weight of the ram head, thereby increasing the positioning accuracy and the ram for smooth vertical movement of the ram. The balancing unit can be further configured.

Each of the blade milling ram head and the boss boring ram head may further include a drop preventing device for preventing a drop of the ram after a forced stop due to a power failure or an end of a work.

The fall prevention device is mounted on top of each of the blade milling ram head and the boss boring ram head and is connected to the vertical feed unit and includes a sub-motor with an electronic brake for stopping the vertical feed unit, the ram balancing unit It may consist of a check valve installed in the.

In the RAM, ceramic powder, chromium oxide (Cr ₂ O ₃ ) powder, aluminum oxide (Al ₂ O), 96-98% of chromium oxide (Cr ₂ O ₃ ) and 2-4% of titanium dioxide (TiO ₂ ) are mixed. ₃ ) Powder, titanium dioxide (TiO ₂ ) powder, yttrium oxide (Y ₂ O ₃ ) powder, zirconia (ZrO ₂ ) powder, chromium nickel (Cr ₃ C ₂ 25 NiCr) powder (chromium carbide 75%, nickel 20%, chromium 5%), any one kind of powder is provided to have a powder particle size of 10 ~ 44㎛, the powder having the powder particle size may be provided with a coating layer is sprayed around the ram.

The coating layer may have a thickness of 50 to 600 μm around the ram, and may be plasma coated to maintain a hardness of 900 to 1000 HV and a surface roughness of 0.1 to 0.3 μm.

The coating layer is formed by jet spraying a selected powder of one of the powders and a gas of 14000 ° C. around the ram at a speed of about 2 Mach, and deforming the heated rams 23 and 24. To prevent this, the ram may be cooled by a cooling device to maintain a temperature of 150 to 200 ° C.

According to the ship propeller processing apparatus according to the present invention, a plurality of ram heads, that is, a blade milling ram head for blade processing of the propeller and a boss boring ram head for boss processing of the propeller are installed on the crossrail at the same time one device In the electronic control can be carried out all the processing process of the propeller can reduce the machining process, thereby reducing the working time, there is an effect that the productivity of the ship propeller can be increased by improving the efficiency of the work.

1 is a front view showing the configuration of a ship propeller processing apparatus according to the present invention.
FIG. 2 is a right side view of FIG. 1
Fig. 3 is a left side view of Fig. 1
Fig. 4 is a plan view of Fig. 1
Figure 5 is a side view showing a base and a rotary table of the ship propeller processing apparatus according to the present invention.
Figure 6 is a schematic cross-sectional view showing the configuration of the base and rotary table of the ship propeller processing apparatus according to the present invention.
7 and 8 are a plan view and a side view showing the configuration of a rotary table of the propeller processing apparatus for ships according to the present invention.
Figure 9 is a detailed view showing the configuration of the main gear box of the ship propeller processing apparatus according to the present invention.
10 is a detailed view showing the configuration of a rotary table index unit of the ship propeller processing apparatus according to the present invention.
Figure 11 is a partially enlarged view showing the configuration of the cross-rail deflection compensation device of the ship propeller processing apparatus according to the present invention.
12 is a partially enlarged view showing a blade milling ram head of the ship propeller processing apparatus according to the present invention.
Figure 13 is a partially enlarged view showing the boss boring ram head of the ship propeller processing apparatus according to the present invention.
14 is a partially enlarged view showing a rotary table clamping device of a ship propeller processing apparatus according to the present invention.
15 is a partially enlarged view showing a horizontal feed unit of a ship propeller processing apparatus according to the present invention.
16 and 17 is a partially enlarged view showing a vertical feed unit of the ship propeller processing apparatus according to the present invention.

The details of other embodiments are included in the detailed description and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent by reference to the embodiments described in detail below with reference to the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various other forms, and it should be understood that the present embodiment is intended to be illustrative only and is not intended to be exhaustive or to limit the invention to the precise form disclosed, To fully disclose the scope of the invention to a person skilled in the art, and the invention is only defined by the scope of the claims.

Hereinafter, a ship propeller processing apparatus according to the present invention with reference to the accompanying drawings will be described in detail.

1 is a front view of a ship propeller processing apparatus according to the present invention, Figure 2 is a right side view of Figure 1, Figure 3 is a left side view of FIG.

Marine propeller processing apparatus according to the present invention is a rotary table 1, rotary table index unit 3, the main gear box 4, the base 2, the cross rail 6, columns (5-a, 5-b) ), Blade milling ram head (7), boss boring ram head (8), hydraulic system, horizontal feed units (18, 19), vertical feed units (20, 21), crossrail deflection compensation devices (16, 17) ).

The rotary table 1 is equipped with a propeller (not shown) to rotate in the circumferential direction, and consists of one inner table 1a and a plurality of outer tables 1b and 1b 'arranged at the outer side of the inner table 1a. Round ribs (not shown) and radiation ribs (not shown) inside the inner table (1a) and outer tables (1b, 1b ') to withstand the maximum loading weight and to prevent deformation and vibration during cutting operations. May be arranged in combination.

Moreover, the radial T groove 1c and the circular T groove 1c 'are arrange | positioned at the upper surface of the inner table 1a.

The rotary table 1 may include a separate rotary encoder (not shown) to enable precise indexing of the rotary table.

The base 2 supports the rotary table 1, and lining plates 27-a and 27-b which support the rotary table 1 and smoothly rotate the rotary table 1 are provided therein.

The lining plates 27-a and 27-b are guideways and the master gear 26 itself is composed of a way, and is made of a hydrostatic bearing made of a special material and each of which has oil pockets installed independently. .
The lining plates 27-a and 27-b are composed of an inner lining plate 27-a and an outer lining plate 27-b and serve as a lower guideway of the hydrostatic bearing. The upper guideway of the hydrostatic bearing is played by the lower surface of the master gear 26.
Oil pockets are installed independently for each of the lining plates 27-a and 27-b, and oil having a constant flow rate and pressure is continuously supplied to the oil pockets so that the lower surface of the master gear 26 and the lining plates 27-a, There is an oil layer between 27-b), which is called a hydrostatic bearing, and this oil layer supports the load of the rotary table 1, the ship propeller workpiece, and the master gear 26.

In addition, the rotary table clamping device 25 for clamping the rotary table 1 is provided on both the left and right sides of the base 2, and the rotary table clamping device 25 has an internal cylinder when the rotary table 1 is clamped. The clamping rods 25-a and 25-b fastened by applying hydraulic pressure to both sides of the (not shown) are simultaneously operated so that the rotary table 1 is clamped at the same time to prevent the rotary table 1 from moving. It is configured to automatically unclamp at the same time by a cylinder (not shown) and a spring (not shown).

The main gear box 4 is for driving the rotary table 1 in the circumferential direction. The main gear box 4 includes a variable speed and a deceleration gear train for driving the rotary table 1, and eliminates noise and vibration. It is connected to the main drive motor 29 by the V-belt 28, and consists of a hydroshift for two-speed gears on the inner surface, and the gear shift is shifted at high speed and low speed by a hydraulic cylinder.

The rotary table index unit 3 includes a gearbox 3a, a gear device 44, a sub-motor 30, a pinion 45, and a backlash removing device 43.

The gearbox 3a is disposed on one side of the base 2, and the gear device 44 is composed of a worm, a worm wheel 44a and gears assembled in the gearbox 3a.

The sub motor 30 is mounted on the outside of the gear box 3a and connected to the gear device 44 to drive the gear device 44.

The pinion 45 is connected to the rotary table 1 to transmit the power of the gear device 44 to the master gear 26 of the rotary table 1, it may be composed of a precisely manufactured helical gear, It is desirable to configure a double pinion system for smooth operation of reverse rotation.

The backlash removal device 43 is connected between the gears of the gear device 44 and between the pinion 45 and the master gear 26 to remove backlash between the gears and between the pinion 45 and the master gear 26. It operates before the index of the rotary table 1 to eliminate backlash between the master gear 26 and the pinion 45.
The backlash removal of the backlash removal device 43 is performed by the upward movement by oil having a constant pressure on the backlash removal device 43 shaft and the helical gear assembled to the backlash removal device 43 shaft. That is, when the backlash remover 43 shaft is raised by oil having a constant pressure and flow rate supplied from the hydraulic system, the helical gear assembled to the backlash remover 43 shaft is raised together with the helical gear. All gear trains 44 except the worm and the worm wheel 44 shaft are rotated to remove the backlash of the pinion 45 and the master gear 26 assembled under the rotary table 1. After removing the backlash between the master gear 26 and the pinion 45, the rotary table 1 is indexed.

The crossrail 6 is arranged above the base 2 and the rotary table 1 so that both sides are supported by the column 5.

The height of the crossrail 6 is fixed at the best height based on the propeller data of the largest size, supports two ram heads 7 and 8 which will be described later, and a liner to smoothly move the ram heads 7 and 8. Bearing type guides are applied.

Here, since the cross rail 6 supports the two ram heads 7 and 8, deflection may occur due to the weight load of the ram heads 7 and 8, and in order to prevent this, the upper portion of the cross rail 6 Crossrail deflection compensation devices 16 and 17 are installed.

The crossrail deflection compensation devices 16 and 17 are composed of a vertical reinforcement beam 16 and a horizontal reinforcement beam 17, and the vertical reinforcement beam 16 and a horizontal reinforcement beam 17 are installed above the crossrail 6. This prevents the deflection of the cross rail 6.

That is, the vertical reinforcement beam 16 is vertically erected on the upper surface of the cross rail 6, and both ends are joined by bolts, and then the cross rails 6 compensate for vertical bending by supporting the liner at the middle part and tightening the bolts again. The horizontal reinforcing beam 17 is laid flat on the upper surface of the cross rail 6, and is fastened by bolts at the rear of the cross rail 6 to be coupled, and the bending of the bolt compensates for the front and rear bending of the cross rail 6.

Columns 5-a and 5-b support both ends of the cross rail 6, and the distance between the columns 5 is set to the maximum rotation diameter of the propeller, and is supported by a three-piece type leveling block. It ensures high precision even during long time use.

The blade milling ram head 7 and the boss boring ram head 8 are mounted simultaneously on the crossrail 6 and are smoothed by the horizontal feed units 18, 19 and the vertical feed units 20, 21. It is installed to enable horizontal and vertical movement.

The horizontal feed units 18, 19 are installed on the crossrail 6 and are connected to the blade milling ram head 7 for horizontal movement of the blade milling ram head 7. 18, a second horizontal feed unit 19 connected with the boss boring ram head 8 for horizontal movement of the boss boring ram head 8.

Vertical feed units 20, 21 are installed in each of the blade milling ram head 7 and the boss boring ram head 8 so that the respective rams 23, 24 can be moved for the vertical movement of the respective rams 23, 24. And a second vertical feed unit 21 mounted to the blade milling ram head 7 and a second vertical feed unit 21 mounted to the boss boring ram head 8.

Here, the horizontal feed units 18, 19 and the vertical feed units 20, 21 apply high precision ball screws 37, 38, 40, and the telescopic cover 48 exposes the ball screw 40. The entire part is covered to protect the ball screw 40 from chips and dust.

The blade milling ram head 8 includes horizontal saddle 12, swivel saddle 11, ram 23, swivel system 22, milling head 9, spindle drive 46, sub-motor 47, er It includes a target 10.

The horizontal saddle 12 is connected to the first horizontal feed unit 18 and is horizontally moved on the crossrail 6, the swivel saddle 11 is disposed in front of the horizontal saddle 12, and the ram 23 is It is mounted on the swivel saddle 11.

The swivel system 22 is disposed on one side of the swivel saddle 11 to connect with the swivel saddle 11 and to drive the swivel saddle 11. At this time, the swivel system 22 rotates the swivel saddle 11 in the range of ± 21.6 degrees.
This swivel system 22 is arranged on one side of the horizontal saddle 12 to connect with the swivel saddle 11 and to drive the swivel saddle 11. The interior of the swivel system 22 is composed of a series of gear trains, so that the gear trains inside the swivel system 22 are rotated by the drive of the swivel system drive motor 51 and engaged with the gears of the swivel system 22. The swivel saddle 11 rotates in the range of ± 21.6 degrees by the rotation of the swivel saddle rotating gear 52 assembled in the.

The milling head 9 is mounted on the lower end of the ram 23, the spindle drive 46 is mounted on one side of the milling head 9.

The sub-motor 47 is mounted to the milling head 9 under the spindle drive 46 to drive the spindle drive 46.

Attachment 10 is mounted on the other side of the milling head 9, is driven in connection with the spindle drive 46, is provided for the processing of the propeller blade plane, inclined surface, overlapping parts and the like.

And the attachment 10 is configured to clamp the milling tool in both directions, although not shown, it is preferable to incorporate an oil cooling device for heat generation during cutting.

The boss boring ram head 8 is a spindle 49, a gearbox 32 having a plurality of gears connected to the spindle, and a spindle motor 31 connected to the gears in the gearbox 32 to rotate the spindle 49. ), The tool clamping device 42 mounted in the vertical direction at the center, the horizontal saddle 13 connected to the second horizontal feed unit 19 and horizontally moved on the crossrail 6, the front of the horizontal saddle 13 A vertical saddle 14 disposed in the vertical saddle 14, a ram 24 disposed in the vertical saddle 14 and connected to the second vertical direction feed unit 21 to be vertically moved, mounted on a lower end of the ram 24, and having an inner diameter of the propeller boss. It consists of a tool holder 15 for machining and drilling, tapping, and machining of end mills.
The boss boring ram head 8 is connected to the second horizontal feed unit 19 and is horizontally saddle 13 moving horizontally on the crossrail 6 and attached to the front of the horizontal saddle 13 to the ram 24. Vertical saddle 14 for supporting the vertical and vertical movement of the vertical movement and the cutting force generated during the cutting process, and a row for rotating the spindle 49 located on the upper portion of the ram 24 and located inside the ram 24 Vertical movement of the gearbox 32 consisting of a gear train, a gear box 32 having a gear train, a spindle motor 31 for rotating the spindle, and a ram 24 located inside the vertical saddle 14. A second vertical feed unit 21 located inside the vertical saddle 14 and above the boss boring head 8, a tool clamping device 42 mounted vertically in the center of the ram 24; Mounted on the bottom of ram 24 for internal machining, drilling and end milling of propeller boss It consists of a holder 15.

Here, the tool clamping device 42 is configured to clamp the tool holder 15 by a disk spring 50 assembled on the spindle, and when unclamping, the tool clamping device 42 is capable of being unclamped by a hydro cylinder and the spindle part is ISO It is a tool shank of 7/24 taper No. 50 standard, and the full stud bolt is made to use BT50-I type, and although not shown, an air cleaning device is built in to remove foreign substances in the tapered part when changing the tool. .
This tool clamping device 42 is a part of the clamping of the tool holder 15 by the disk spring 50 assembled on the upper spindle 49 of the ram 24, and located below the ram 24 in the hydraulic system. It consists of a part for clamping the tool holder 15 by operating the piston by using oil having a constant pressure and hydraulic pressure supplied. When unclamping the tool clamping device 42, the draw bar located inside the spindle 49 is supplied to the hydraulic cylinder located inside the upper gearbox 32 of the ram 24 by supplying oil with constant pressure and hydraulic pressure in the hydraulic system. And a portion for unclamping the tool holder 15, and a portion for retracting the piston located under the ram 24 from the tool holder 15 to unclamp the tool holder 15.

On the other hand, each of the blade milling ram head 7 and the boss boring ram head 8 is disposed on both sides of the rams 23 and 24 to be connected to the hydraulic system and compensate for the vertical load due to the weight of the ram heads 7 and 8. Ram positioning unit 34, 35 for increasing the positioning accuracy and smooth up and down movement of the ram (23, 24) is configured.
The ram balancing units 34 and 35 consist of components of cylinders, rods and pistons. The ram heads 7 supply oil with a constant pressure and flow rate generated in the hydraulic system to the lower parts of the ram balancing units 34 and 35. , 8) to compensate for the vertical load due to its own weight, to increase the positioning accuracy and to facilitate the smooth vertical vertical movement of the ram heads 7 and 8.

In addition, each of the blade milling ram head 7 and the boss boring ram head 8 may be further configured with a fall prevention device for preventing the fall of the rams 23 and 24 after a forced stop due to a power failure or the end of work.

The anti-drop device is mounted on top of each of the blade milling ram head 7 and the boss boring ram head 8 and is connected to the vertical feed units 20 and 21 to stop the vertical feed units 20 and 21. And a check valve (not shown) provided in the sub-motors 33 and 36 in which the electromagnetic brakes are incorporated, and the ram balancing units 34 and 35.
This fall prevention device is mounted on top of each of the blade milling ram head 7 and the boring ram head 8 and has a servomotor 33 and 36 with an integrated electromagnetic brake connected to the vertical feed units 20 and 21. When the power failure breaks the rotation of the shaft of the servomotors (33, 38) with the built-in electromagnetic brake with a constant force.
This causes the vertical feed units 20 and 21 to stop without rotation, and also the rotation of the vertical feed ball screws 37 and 38 connected to the vertical feed units 20 and 21 so that the blade milling ram heads do not rotate. (7) to prevent the boss boring ram head 8 from falling.

In addition, a coating layer 100 may be further configured on the surfaces of the rams 23, 24 of the blade milling ram head 7 and the boss boring ram head 8.

The coating layer 100 performs sandblasting and cleaning operations of the rams 23 and 24, and then forms the coating layer 100 around the RAMs 23 and 24.

Such a coating layer 100 is a ceramic powder, chromium oxide (Cr ₂ O ₃ ) powder, aluminum oxide 96-98% chromium oxide (Cr ₂ O ₃ ) and 2-4% titanium dioxide (TiO ₂ ) is mixed (Al ₂ O ₃ ) powder, titanium dioxide (TiO ₂ ) powder, yttrium oxide (Y ₂ O ₃ ) powder, zirconia (ZrO ₂ ) powder, chromium nickel (Cr ₃ C ₂ 25 NiCr) powder (chromium carbide 75%, Nickel 20%, chromium 5%), any one kind of powder is provided to have a powder particle size of 10 ~ 44㎛, the powder having the above-described powder particle size is made by spraying around the ram (23, 24).

Chromium oxide (Cr ₂ O ₃ ) serves to prevent rust by acting as a passivity layer that blocks oxygen invading into the metal.

Titanium dioxide (TiO ₂ ) is very stable physicochemically and has a high hiding power, thus becoming a white pigment. In addition, the refractive index is high, it is widely used in high refractive index ceramics. It has photocatalytic and superhydrophilic properties. Titanium dioxide (TiO ₂ ), air purification, antibacterial, harmful substance decomposition, pollution prevention function, discoloration prevention function. The titanium dioxide (TiO ₂ ), so that the coating layer 100 is reliably coated around the ram (23, 24), decomposes, removes the foreign matter attached to the ram (23, 24) ram (23, 24) To prevent damage.

Here, when chromium oxide (Cr ₂ O ₃ ) and titanium dioxide (TiO ₂ ) are mixed and used, these mixing ratios are 96 to 98% of chromium oxide (Cr ₂ O ₃ ) and titanium dioxide (TiO ₂ ) 2 to It is preferred that 4% is mixed.

When the mixing ratio of chromium oxide (Cr ₂ O ₃ ) is less than 96-98%, the coating of chromium oxide (Cr ₂ O ₃ ) is often broken in an environment such as high temperature, and thus the ram (23, The antirust effect of 24) was drastically reduced.

When the mixing ratio of titanium dioxide (TiO ₂ ) is less than 2 to 4%, the effect of titanium dioxide (TiO ₂ ) was insignificant enough to fade the purpose of mixing it with chromium oxide (Cr ₂ O ₃ ). That is, titanium dioxide (TiO ₂ ) decomposes and removes foreign matters attached to the circumferences of the rams 23 and 24, thereby preventing the rams 23 and 24 from being corroded or damaged. The mixing ratio is more than 2 to 4%. If small, there is a problem that takes a long time to decompose the attached foreign matter.

When the aluminum oxide (Al ₂ O ₃ ) is formed with the coating layer 100 around the rams 23 and 24, the coating is even and there is no gap, so the circumference of the rams 23 and 24 is reliably protected. The melting point of the aluminum oxide (Al ₂ O ₃ ) is very high to protect the ram (23, 24) at high temperature, and has a great effect on the oxidation prevention. Therefore, aluminum oxide (Al ₂ O ₃ ) coated on the ram (23, 24), the sea water or air to prevent contact with the circumference of the ram (23, 24) to prevent the ram (23, 24) from oxidizing .

Yttrium oxide (Y ₂ O ₃ ) is excellent in heat resistance, high temperature oxidation resistance and corrosion resistance, and is suitable for thermal spray coating in that it exhibits plasma corrosion resistance even in a plasma etching atmosphere.

Zirconia (ZrO ₂ ) is a heat-resistant material with a high melting temperature (about 2,700 ° C). It has low thermal conductivity, broad chemical stability from acidic to alkaline range, low thermal expansion, high strength and high hardness (more than 7.0 MOS hardness). ) Has excellent material properties such as friction resistance.

The chromium nickel (Cr ₃ C ₂ 25 NiCr) powder is made by mixing 75% chromium carbide, 20% nickel, and 5% chromium.

The coating layer 100 made of one selected from these materials has a thickness of 50 to 600 µm around the rams 23 and 24, the hardness is 900 to 1000 HV, and the surface roughness is 0.1 to 0.3 µm. Plasma coated to

The coating layer 100 is sprayed at 400㎛ by jet spraying around the ram (23, 24) at a speed of about Mach 2 and the powder of one selected powder powder and 14000 ℃ of the above-mentioned powder is diamond Lapping to 50-600 μm using a diamond wheel and a film.

If the thickness of the coating layer 100 is less than 50㎛, the effect by the above-described ceramic coating layer 100 is not guaranteed, if the thickness of the coating layer 100 exceeds 600㎛, while the increase of the above-described effect is insignificant There is a problem in that work time and material costs are wasted by excessive ceramic coating.

While the coating layers 100 are coated on the rams 23 and 24, the temperatures of the rams 23 and 24 are raised, so that the rams 23 and 24 are cooled by the cooling device ( It is cooled to) to maintain a temperature of 150 ~ 200 ℃.

The thermal spraying method for forming the coating layer 100 around the rams 23 and 24 is carried out in a molten or semi-melted state by injecting metals, ceramics, and mixtures thereof into a hot gas-flame or plasma. It is a surface treatment technology which forms a film on the surface of a base material by spraying at high speed.

When electrical energy is applied between the tungsten cathode and the Cu anode nozzle of the thermal spray, an arc is generated, and when a gas or a gas mixture flows, plasma is generated. In this case, plasma is dissociated into atoms when the molecular gas is heated to a high temperature, and when energy is added thereto, electrons are released. This state is useful as a heat source having a very high energy. The characteristics of the plasma jet as a thermal spraying source are as follows.

Since it is a heat source with high energy density, it is easy to spray a high melting point metal or ceramics. If the material is accompanied by a safe melting phenomenon such as metals, ceramics, plastics, and the like, spraying is possible, so the selection area of the coating material is high. Since the velocity of the plasma jet is high, the thermal spraying material is adsorbed on the workpiece at high speed, thereby obtaining a high adhesion strength and high density coating. It is easy to output large, so the amount of spraying per unit time is big, so workability is good and economy is high. It is oxygen-free, carbon-free and clean, thermochemically active heat source, so there is little contamination and change of thermal spray material.

Depending on the type and condition of the heat source, the temperature of the thermal spray particles, the dwell time, the contact time with the atmospheric gas component, in particular, the collision energy to the surface of the base metal, and the rapid freezing and condensing velocity vary. In other words, the physical and chemical properties of the thermal spray coating vary greatly.

The thermal spraying material injected into the plasma flame is heated and melted by a heat source and is flying at a high speed by the plasma jet. Since the molten particles in the air contact the air and rush to the base material with the oxide film formed thereon, the thermal spray coating formed on the rams 23 and 24 has a cross-sectional structure in which numerous particles of the oxide film are deposited on the surface. Will have

The powder particle size suitable for thermal spraying is preferably in the range of 10 to 44 µm. If the fineness of the thermal spray is less than 10 μm, it is easy to vaporize in the thermal spraying, and if the fineness of the thermal spraying is more than 44 μm, the powder particle size of the thermal spraying is preferably 10 to 44 μm. In addition, a great influence on the quality of the thermal spray coating is a particle size distribution, and when the particle size difference is large, the energy and flight trajectory obtained by each powder particle from the heat source are different from each other, thereby decreasing the uniformity of the composition and physical properties of the coating layer 100. Therefore, strict spray powder particle size distribution control is required.

It is preferable to be spherical within the above-described powder particle size in order to make the supply rate of the thermal spraying uniform and stable and to uniformly heat the supplied powder, that is, to improve the flowability of the molten particles.

A sealing material (not shown) made of chromic anhydride (CrO ₃ ) made of a metallic glass quartz system may be coated around the coating layer 100. Chromic anhydride may be applied around the coating layer 100 made of chromium nickel powder as the inorganic sealing material.

Anhydrous chromic acid (CrO ₃ ) is used in places that require high abrasion resistance, lubricity, heat resistance, corrosion resistance and releasability, is not discolored in the atmosphere, has high durability, and has good abrasion resistance and corrosion resistance. When the silyl is coated around the coating layer 100, the coating thickness is preferably about 0.3 to 0.5㎛. If the coating thickness of the sealing material is less than 0.3 占 퐉, the sealing material easily peels off even in a slight scratch groove, so that the above-mentioned effect can not be obtained. If the coating thickness of the sealing material is made thick enough to exceed 0.5 탆, pin holes, cracks, and the like will increase on the plated surface. Therefore, the coating thickness of the sealing material is preferably about 0.3 to 0.5 mu m.

The propeller processing apparatus for ships according to the present invention having such a configuration is characterized in that the blade milling ram head 7 and the boss of the propeller for the blade processing of the plurality of ram heads 7, 8, that is, the propeller, on the cross rail 6. Since the boss boring ram head 8 is installed at the same time, it is possible to carry out all the process of the propeller through electronic control in one device, thereby reducing the machining process, thereby reducing the working time and improving the work efficiency. The productivity of the ship propeller can be increased.

In addition, since the vertical reinforcement beam 16 and the horizontal reinforcement beam 17 are installed on the upper portion of the cross rail 6, the plurality of ram heads 7 and 8 may be generated by simultaneously installing the cross rails 6 on the cross rail 6. Deflection of the cross rail 6 can be prevented.

In addition, since the coating layer 100 is formed on the surfaces of the rams 23 and 24, corrosion and damage of the rams 23 and 24 may be prevented.

1: rotary table 1a: inner table
1b, 1b ': outer table 1c, 1c': T groove
2: base 3: rotary table index unit
4: main gearbox 5-a, 5-b: column
6: crossrail 7: blade milling ram head
8: Boss Boring Ram Head 9: Milling Head
10: attachment 11: swivel saddle
12, 13: horizontal saddle 14: vertical saddle
15 tool holder 16 vertical reinforcement beam
17: horizontal reinforcement beam 18: first horizontal feed unit
19: second horizontal feed unit 20: first vertical feed unit
21: second vertical feed unit 22: swivel system
23, 24: RAM 25: Rotary Table Clamping Device
26: master gear 27-a, 27-b: lining plate
28: V-belt 29: main drive motor
30, 33, 36, 39, 47: sub-motor 31: spindle motor
32: gearbox 34, 35: ram balancing unit
37, 38, 40: ball screw 42: tool clamping device
43: backlash removal device 44: gear device
44a: Worm and Worm Wheel 45: Pinion
46: spindle drive 48: telescopic cover
49: spindle 50: disc spring
51: swivel system drive motor 52: swivel saddle rotation gear

Claims (13)

A rotary table (1) mounted with a propeller to rotate in the circumferential direction;
A rotary table index unit (3) connected to the rotary table (1) to control a rotation angle of the rotary table (1);
A main gear box (4) connected to the rotary table (1) and having a driving device for driving the rotary table (1) in the circumferential direction;
Lining plates 27-a and 27-b in which the propeller and the rotary table 1 are installed and gently rotate the propeller and the rotary table 1 and simultaneously support the rotary table 1 and the propeller. A base 2 having;
A cross rail 6 disposed above the base 2;
Columns (5-a, 5-b) disposed on both sides of the base (2) to support the crossrails (6);
A blade milling ram head 7 mounted on the crossrail 6 for blade processing of the propeller;
A boss boring ram head 8 mounted on the crossrail 6 for boss processing of the propeller;
Hydraulic system connected to each functional unit; including,
The blade milling ram head 7 and the boss boring ram head 8 are simultaneously mounted on the crossrail 6 and the horizontal smoothness of the blade milling ram head 7 and the boss boring ram head 8 is achieved. And a plurality of horizontal feed units 18, 19 and vertical feed units 20, 21 mounted on the crossrail 6 and the heads 7, 8 for vertical movement, and the blade milling. In order to prevent sagging of the crossrail 6 due to the weight load of the ram head 7 and the boss boring ram head 8, crossrail sag compensation devices 16 and 17 are further provided on the top of the crossrail 6. Make up;
The rotary table 1,
Inner table (1a),
Outer tables 1b and 1b 'arranged on the outer side of the inner table 1a,
Round ribs and radial ribs to prevent deformation and vibration during cutting operations,
Ship propeller processing apparatus, characterized in that consisting of a radial T-groove (1c) and a circular T-groove (1c ') disposed on the upper surface of the inner table (1a). delete delete The method of claim 1,
The rotary table index unit 3,
A gear box 3a disposed at one side of the base 2,
Gear device 44 composed of a worm and a worm wheel 44a and gears assembled in the gearbox 3a,
A sub-motor 30 mounted outside the gear box 3a and connected to the gear device 44 to drive the gear device 44,
Pinion 45 connected to the rotary table 1 to transmit the power of the gear device 44 to the master gear 26 of the rotary table 1,
Connected between the gears of the gear device 44 and between the pinion 45 and the master gear 26 to remove backlash between the gears and between the pinion 45 and the master gear 26. Marine propeller processing apparatus, characterized in that consisting of a backlash removal device (43) for. 5. The method of claim 4,
The blade milling ram head 7 is
A horizontal saddle 12 connected to the horizontal feed units 18, 19 and horizontally moved on the crossrail 6,
Swivel saddle 11 disposed in front of the horizontal saddle 12,
Ram 23 mounted to the swivel saddle 11,
A swivel system 22 disposed on one side of the swivel saddle 11 to drive the swivel saddle 11 in rotation;
A milling head 9 mounted at the bottom of the ram 23,
A spindle drive 46 mounted on one side of the milling head 9,
A sub-motor 47 mounted to the milling head 9 below the spindle drive 46 to drive the spindle drive 46;
Mounted on the other side of the milling head (9) and driven in connection with the spindle drive 46 and includes an attachment (10) for the processing of the plane, inclined surface, overlapping parts, etc. of the propeller blade,
The ram 23 is configured in a square shape so as to withstand the cutting during the cutting process, the swivel system 22 rotates the swivel saddle 11 in the range of ± 21.6 degrees ship propeller processing apparatus characterized in that . The method of claim 5,
The attachment 10 is configured to clamp the milling tool in both directions, ship propeller processing apparatus characterized in that the built-in oil cooling device for heat generation during cutting processing. The method according to claim 6,
The boss boring ram head 8
Spindle 49,
Gear box 32 having a plurality of gears connected to the spindle 49,
A spindle motor 31 connected to a gear in the gearbox 32 to rotate the spindle 49;
Tool clamping device 42 mounted in the vertical direction in the center,
A horizontal saddle 13 connected to the horizontal feed units 18, 19 and horizontally moved on the crossrail 6,
Vertical saddle 14 disposed in front of the horizontal saddle 13,
A ram 24 disposed in the vertical saddle 14 and for vertical movement of the boss boring ram head 8,
The propeller processing apparatus for ships, characterized in that mounted on the bottom of the ram 24 and comprises a tool holder (15) for the inner diameter machining and drilling, tapping, end mill processing of the propeller boss. The method of claim 7, wherein
Each of the blade milling ram head 7 and the boss boring ram head 8 is disposed on both sides of the rams 23 and 24 to be connected to the hydraulic system and to compensate for the vertical load due to the self-weight of the ram head. The propeller processing apparatus for ships, characterized in that further configured to further increase the ram balance unit (34, 35) for the vertical movement of the ram (23, 24). 9. The method of claim 8,
Each of the blade milling ram head 7 and the boss boring ram head 8 is further provided with a drop preventing device for preventing the fall of the rams 23 and 24 after a forced stop due to a power failure or an end of work. Marine propeller processing device. 10. The method of claim 9,
The fall prevention device
An electron mounted on top of each of the blade milling ram head 7 and the boss boring ram head 8 and connected to the vertical feed units 18, 19 to stop the vertical feed units 20, 21. Sub-motors 33 and 36 with integrated brakes,
Ship propeller processing apparatus comprising a check valve installed in the ram balancing unit (34, 35). The method of claim 7, wherein
In the RAM 23, 24,
Ceramic powder, chromium oxide (Cr ₂ O ₃ ) powder, aluminum oxide (Al ₂ O ₃ ) powder, 96-98% of chromium oxide (Cr ₂ O ₃ ) and 2-4% of titanium dioxide (TiO ₂ ) Titanium dioxide (TiO ₂ ) powder, yttrium oxide (Y ₂ O ₃ ) powder, zirconia (ZrO ₂ ) powder, chromium nickel (Cr ₃ C ₂ 25 NiCr) powder (chromium carbide 75%, nickel 20%, chromium 5%) Among them, any one kind of powder is provided to have a powder particle size of 10 ~ 44㎛, characterized in that the coating layer 100 is formed by spraying the powder having the above-described powder particle size around the ram (23, 24) Marine propeller processing device. The method of claim 11,
The coating layer 100,
The propeller processing apparatus for ships, characterized in that the circumference of the ram (23, 24) is made of a thickness of 50 to 600㎛, the hardness is 900 to 1000HV, the surface roughness is maintained to 0.1 ~ 0.3㎛. The method of claim 12,
The coating layer 100,
The powder powder of one selected from the above powder powder and the gas of 14000 ℃ by jet spraying around the ram (23, 24) at a speed of about Mach 2, the heated of the ram (23, 24) The propeller processing apparatus for ships, characterized in that the ram (23, 24) is cooled by a cooling apparatus to maintain a temperature of 150 ~ 200 ℃ to prevent deformation.

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