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Floor-type Horizontal Boring Mills
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Brief Parameters
Spindle diameter: Φ130mm
Column travel (X): 4000+n*1000mm
Spindle box vertical travel (Y): 2000-3000mm
Spindle axial travel (Z): 800mm
Ram travel (W): 800mm
Machine specifications
Equipments
Optionals
Features
Machine layout
This machine is of single column, spindle head hang aside, column fixed on saddle, and saddle moves along machine bed guideway, spindle head moves along column guideway, main motion is the spindle rotation.(See below drawing)
Four liner axes are:
1. Column cross travel X
2. Vertical travel of spindle head Y
3. Axial travel of ram W
4. Axial travel of boring spindle Z
Basic parts
Bed, column, ram, and ram saddle are all adopt high quality ageing treated cast iron, and ram is aging treated nodular cast iron. Adopt the FEM to get the highest rigidity. The bed is closed boxy shape with reinforce rod and reasonable multi supporting points. The column is with four sides double-layer wall structure.
Guideways
The three linear guideways of the X,Y and Z axes are all compound guideways (sliding guideways with plastic inserts combined with guideways with rollers ).The connect parts also with steel strip inserts. They are of high contact rigidity, low friction, wear resistant, high damping capability, and low high-frequency vibration, high accuracy, self-lubrication, and easy maintenance. X Y & Z equipped with hydraulic clamp device.
Spindle system
Spindle consist of hollow spindle (milling spindle) and boring spindle. The bearing spindle adopts the imported bearing, and spindle pull method is disk spring clamping and hydraulic loose; Material of the spindle is 38CrMoAlA electroslag-refined, nitrated steel. Over 30 operations are required for processing the spindle and its mirror surface has ground and lapped.
Main driven system
Spindle rotation (SP axis) uses 3 steps shift gear box with SIEMENS AC servo motor drive, through gear couple to hollow milling spindle, and realize the rotation of boring spindle. High/middle/low hydraulic auto shift realized by hydraulic controlled oil cylinder dial, and approach switch inspects the dial position. The structure is of large speed area, low power loss, and big output torque. Meanwhile internal the ram constanting oil cycle cooling method adopted to guarantee the rotation accuracy of spindle, reduce the heat thermal deformation (power torque figure below).
Feed mechanism
X axis adopt the double servo driven structure which consist of double servo motor+ high torque planet decelerator +double pinion+ high accuracy rack. The double servo motor controlled by CNC system and through the electrical automatic adjustment method to eliminate transmission gap between pinion and rack, this structure has the transmission accuracy, high efficiency and reliable performance characteristics.
For Y, Z and W axis use SIEMENS 1FT6 AC motor through deceleration device to driven the high rigid preloading roll ball screw rod nut pair to realized each axes’s feed. This kind of structure is compact and reasonable with characteristic of high precision and high transmission efficiency. At the same time, servo motor for Y axis with brake function can prevent the accident of spindle sudden fall when power blankout.
Lubrication
Gears and bearings in gear box are lubricated by mechanical oil, ballscrew couples are lubricated by pouring oil, spindle bearings are lubricated by imported oil air.
Guideway covers
X axis: stainless extendable cover, Y axis: metal loricae type, three sides covered.
Balancing and accuracy compensation mechanism
1. The balance for spindle head is realized by a counter weight which is in column and move together with spindle head.
2. Ram balancing compensation: ram adopts servo following balancing compensation mechanism which consist of servo motor + worm gear and worm reducer+ ball screw pair + wire rope and pulley to form a closed servo balancing system. The basic theory of this system is when ram move to generate gravity change the compensation system will automatically compensate as per setting compensation program to realized nonlinear ram servo balancing compensation.
3. Accessories compensation: Accessories compensation is for different accessories fixed with the machine. It is realized by an oil cavity through an approach switch which inspects and identifies accessories and controls electric hydraulic proportion valve by system.
Hydraulic systems
Independent hydraulic tank to provide the oil its main function is for tool clamp and loose, spindle speed change and machine lubrication. The hydraulic oil and constant temperature oil are separated by each pump. Adopting the oil coolant also enhance the hydraulic unit and hydraulic system reliability. The dimension of hydraulic unit is international standard.
CNC system
Equipped with SINUMERIK 840D SLsystem, Sinamics servo drive system and SIMATICS7-300 PLC.
Operation cabinet
Machine equipped with operation cabinet which can not only move along with spindle head but also can perform horizontal movement.
Spindle diameter: Φ130mm
Column travel (X): 4000+n*1000mm
Spindle box vertical travel (Y): 2000-3000mm
Spindle axial travel (Z): 800mm
Ram travel (W): 800mm
Machine specifications
| Items | TK6913 |
| Boring spindle diameter | Ф130mm |
| Spindle taper | ISO 50 |
| Main motor power- servo motor | 37kW |
| Spindle speed | 2-1500rpm |
| Max. Torque of boring head | 2500Nm |
| Size of ram section | 420X480mm |
| Travel | |
| Longitudinal travel of column ( X axis) | 4000+n*1000mm (4-30m) |
| Vertical travel of boring head (Y axis) | 2000-3000mm |
| Boring spindle travel (Z axis) | 800mm |
| Ram travel (W axis) | 800mm |
| Feeding speed | |
| Feeding speed of column longitudinal ( X axis) | 1~3000mm/min |
| Feeding speed of boring head (Y axis) | 1~3000mm/min |
| Feeding speed of boring spindle (Z axis) | 1~2000mm/min |
| Feeding speed of ram（W axis） | 1~2000mm/min |
| Rapid travel speed (X axis) | 8000mm/min |
| Rapid travel speed (Y axis) | 6000mm/min |
| Rapid travel speed (Z/W axis) | 4000mm/min |
| Accuracy and Repetitive positioning accuracy | |
| X, Y axis positioning accuracy | ±0.025/1000mm |
| Z, W positioning accuracy | ±0.03/1000mm |
| X, Y repetitive positioning accuracy | ±0.020/1000mm |
| Z, W repetitive positioning accuracy | ±0.025/1000mm |
Equipments
| Item 01 | Descriptions | |
| 01.01 | SIEMENS840Dsl | |
| 01.02 | Manual pulse generator | |
| 01.03 | Automatic lubrication system | |
| 01.04 | Automatic hydraulic clamping system | |
| 01.05 | X axis guide-way cover | |
| 01.06 | Y axis guide-way cover | |
| 01.07 | Balancing and accuracy compensation mechanism | |
| 01.08 | X/Y/Z liner axis | |
| 01.09 | Tri-color light | |
| 01.10 | Work lamp | |
| 01.11 | Foundation bolts and pads |
| Item 02 | Descriptions | |
| 02.01 | Rotary table | |
| 02.02 | Face plate | |
| 02.03 | Right angle milling head | |
| 02.04 | Universal milling head | |
| 02.05 | Floor bed | |
| 02.06 | 40 or 60 stations ATC |
Machine layout
This machine is of single column, spindle head hang aside, column fixed on saddle, and saddle moves along machine bed guideway, spindle head moves along column guideway, main motion is the spindle rotation.(See below drawing)
Four liner axes are:
1. Column cross travel X
2. Vertical travel of spindle head Y
3. Axial travel of ram W
4. Axial travel of boring spindle Z
Basic parts
Bed, column, ram, and ram saddle are all adopt high quality ageing treated cast iron, and ram is aging treated nodular cast iron. Adopt the FEM to get the highest rigidity. The bed is closed boxy shape with reinforce rod and reasonable multi supporting points. The column is with four sides double-layer wall structure.
Guideways
The three linear guideways of the X,Y and Z axes are all compound guideways (sliding guideways with plastic inserts combined with guideways with rollers ).The connect parts also with steel strip inserts. They are of high contact rigidity, low friction, wear resistant, high damping capability, and low high-frequency vibration, high accuracy, self-lubrication, and easy maintenance. X Y & Z equipped with hydraulic clamp device.
Spindle system
Spindle consist of hollow spindle (milling spindle) and boring spindle. The bearing spindle adopts the imported bearing, and spindle pull method is disk spring clamping and hydraulic loose; Material of the spindle is 38CrMoAlA electroslag-refined, nitrated steel. Over 30 operations are required for processing the spindle and its mirror surface has ground and lapped.
Main driven system
Spindle rotation (SP axis) uses 3 steps shift gear box with SIEMENS AC servo motor drive, through gear couple to hollow milling spindle, and realize the rotation of boring spindle. High/middle/low hydraulic auto shift realized by hydraulic controlled oil cylinder dial, and approach switch inspects the dial position. The structure is of large speed area, low power loss, and big output torque. Meanwhile internal the ram constanting oil cycle cooling method adopted to guarantee the rotation accuracy of spindle, reduce the heat thermal deformation (power torque figure below).
Feed mechanism
X axis adopt the double servo driven structure which consist of double servo motor+ high torque planet decelerator +double pinion+ high accuracy rack. The double servo motor controlled by CNC system and through the electrical automatic adjustment method to eliminate transmission gap between pinion and rack, this structure has the transmission accuracy, high efficiency and reliable performance characteristics.
For Y, Z and W axis use SIEMENS 1FT6 AC motor through deceleration device to driven the high rigid preloading roll ball screw rod nut pair to realized each axes’s feed. This kind of structure is compact and reasonable with characteristic of high precision and high transmission efficiency. At the same time, servo motor for Y axis with brake function can prevent the accident of spindle sudden fall when power blankout.
Lubrication
Gears and bearings in gear box are lubricated by mechanical oil, ballscrew couples are lubricated by pouring oil, spindle bearings are lubricated by imported oil air.
Guideway covers
X axis: stainless extendable cover, Y axis: metal loricae type, three sides covered.
Balancing and accuracy compensation mechanism
1. The balance for spindle head is realized by a counter weight which is in column and move together with spindle head.
2. Ram balancing compensation: ram adopts servo following balancing compensation mechanism which consist of servo motor + worm gear and worm reducer+ ball screw pair + wire rope and pulley to form a closed servo balancing system. The basic theory of this system is when ram move to generate gravity change the compensation system will automatically compensate as per setting compensation program to realized nonlinear ram servo balancing compensation.
3. Accessories compensation: Accessories compensation is for different accessories fixed with the machine. It is realized by an oil cavity through an approach switch which inspects and identifies accessories and controls electric hydraulic proportion valve by system.
Hydraulic systems
Independent hydraulic tank to provide the oil its main function is for tool clamp and loose, spindle speed change and machine lubrication. The hydraulic oil and constant temperature oil are separated by each pump. Adopting the oil coolant also enhance the hydraulic unit and hydraulic system reliability. The dimension of hydraulic unit is international standard.
CNC system
Equipped with SINUMERIK 840D SLsystem, Sinamics servo drive system and SIMATICS7-300 PLC.
Operation cabinet
Machine equipped with operation cabinet which can not only move along with spindle head but also can perform horizontal movement.
Brief Parameters
Spindle diameter: Φ130mm
Column travel (X): 4000+n*1000mm
Spindle box vertical travel (Y): 2000-3000mm
Spindle axial travel (Z): 800mm
Ram travel (W): 800mm
Spindle diameter: Φ130mm
Column travel (X): 4000+n*1000mm
Spindle box vertical travel (Y): 2000-3000mm
Spindle axial travel (Z): 800mm
Ram travel (W): 800mm
Equipments
| Item 01 | Descriptions | |
| 01.01 | SIEMENS840Dsl | |
| 01.02 | Manual pulse generator | |
| 01.03 | Automatic lubrication system | |
| 01.04 | Automatic hydraulic clamping system | |
| 01.05 | X axis guide-way cover | |
| 01.06 | Y axis guide-way cover | |
| 01.07 | Balancing and accuracy compensation mechanism | |
| 01.08 | X/Y/Z liner axis | |
| 01.09 | Tri-color light | |
| 01.10 | Work lamp | |
| 01.11 | Foundation bolts and pads |
| Item 02 | Descriptions | |
| 02.01 | Rotary table | |
| 02.02 | Face plate | |
| 02.03 | Right angle milling head | |
| 02.04 | Universal milling head | |
| 02.05 | Floor bed | |
| 02.06 | 40 or 60 stations ATC |
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