BC-280 and BC-350 Column Type Bandsaw OPERATION MANUAL
BC-280 and BC-350 Column Type Bandsaw OPERATION MANUAL
Contents 1. Main specification of -----------------------------------------------------------------------2 2. Main components of sawing machine -------------------------------------------------2 3. selection of teeth number of blade for variable stocks ----------------------------2 4. attention for usage of new blade selected -------------------------------------------3 5. installation methods for the blade ------------------------------------------------------3 6. fixture stock ----------------------------------------------------------------------------------4 7. hydraulic system ----------------------------------------------------------------------------4 8. electrical principle chart -------------------------------------------------------------------4 9. operation and maintenance --------------------------------------------------------------4 10. usual major faults and solution ----------------------------------------------------------6 11. Precautions -----------------------------------------------------------------------------------9 12. packing list ------------------------------------------------------------------------------------10 1
Contents 1. Main specification of -----------------------------------------------------------------------2 2. Main compone...
1. Main Technical Parameters Parameter BC-280 BC-350 〇280□280x280 〇350□350x350 Three grade:36/56 Three grade:36/56 Hydraulic and stepless Hydraulic and stepless 3505x27x0.9 4115x34x1.1 Hydraulic Hydraulic 2.2/2.8 2.2/2.8 Hydraulic pump power(kw) 0.55 0.55 Type of main transmission Worm bar Worm bar 1800x1120x1350 2000x1150x1450 Max. cutting range (mm) Cutting speed (m/min) Feeding speed adjustment Blade model (mm) Clamping type Main motor power (kw) Machine layout (mm) 2.Main components of sawing machine Saw frame base Clamping device Saw wheel Electrical cabinet Coolant tank Operation station Sub-column Leading device Working light Oil pump motor reducer Coolant pump Main oil cylinder Driving wheel Driven wheel Clamping cylinder 3. Selection of teeth number of saw blade for variable stocks Cutting length Less 15 15-25 25-75 75-150 150-250 12-10 10-8 8-6 6-4 4-3 (mm) Teeth number 2
1.  Main Technical Parameters  Parameter  BC-280  BC-350     280   280x280     350   350x350  Three grade 36 56  Three gra...
4. Attention for usage of new saw blade selected 4.1 Before loading the new saw blade, keeping the cleaning of the saw blade wheel and checking the coolant and hydraulic system 4.2 Fine and coarse teeth saw blade should be applied according to size of stocks, please check the above item 3 to choose the suitable saw blade for your stock so that no any teeth of saw blade broken; 4.3 Cutting speed should be lower while cutting the material with quite high hardness 4.4 The saw blade selected also was considered as per the shape of the stock, teeth-change blade should be used for the profile stock, keep at least two tooth inside the stock constantly 4.5 Reasonable to choose coolant liquid for variable stock, oil and water ratio can be 1:5 for high alloy steel and 1:10 for low alloy steel and carbon steel 5. Installation methods for the saw blade 5.1 checking the saw blade and welding coupling before installation 5.2 up rise the saw frame and open the front cover, follow the marks instruction and rotating up the lead screw 5-7cm, and open the adjustment crews on the left and right 5.3 keep the new blade into the leading box and adjusting the nuts and clamping the blade gently as per the instruction, the clamping force of blade was normally about 25N.M 3
4. Attention for usage of new saw blade selected 4.1  Before loading the new saw blade, keeping the cleaning of the saw bl...
5.4 power on and off and make the blade rotating gradually till the saw blade into normal working 5.5 keeping the machine into free working for 2 minutes for checking without any abnormal happened 6. Fixture stock See the figure 1 for the clamping of variable stocks 7. Hydraulic system The hydraulic system was used for: (1) up and down of saw frame (2) clamping and unclamping of stock (3) blade feeding speed, system pressure:1.8-2Mpa,see below Figure 2 No. Model Name qty Remark 1 WU25-100 Filter 1 2 CB-B6 Gear pump 1 6 liter 3 YS712-4 Motor 1 0.55kw/1400rpm 4 P-B10B Overflow valve 1 5 DSG-02-3C2-24v Electrical-magnetic valve(3 positions;4-way) 1 6 HDJ-10Y Throttle Valves 1 7 22C-10 Stroke valve (2 positions,2 way) 1 8 340-10 Selector valve (3 positions,4 ways) 1 8. Electrical principle chart (see Figure 3) 4
5.4 power on and off and make the blade rotating gradually till the saw blade into normal working 5.5 keeping the machine ...
9. Operation and maintenance 9.1 checking the power source with correct wire connecting and keep the suitable coolant liquid and hydraulic oil 9.2 Idle running machine and assure the machine with right rotating direction and fluent coolant and moving of up and down 9.3 adjusting the stock stopper with right position of cutting length, and stock is in clamping status 9.4 keeping the stock bracket at suitable height 9.5 adjusting the up-valve and down-valve and make the saw blade 2cm higher than the stock, and changing the stroke quill and make sure that the stroke switch can be touched properly during up rising and cutting off of saw blade, cutting speed should be increased slowly while cutting into the stock 9.6 lubrication oil No.32 was applicable for the sliding parts, such as clamping vise, main column, sub-column 9.7 Lubrication oil should be changed periodically 9.8 Any parts of the personal body should be away from the running blade 9.9 Overload operation will cause a hard damage to the machine 9.10 Blade changing should be operated after power off 9.11 Keep clean environment around the machine 9.12 Power off the main switch while stopping the machine and rise-up the bracing, opening the vise and saw blade 5
9. Operation and maintenance 9.1 checking the power source with correct wire connecting and keep the suitable coolant liqu...
10. Usual major faults and solution 10.1 mechanical parts: Faults Teeth broken Teeth tip wear off Harsh Section of Main reason caused solution 1.high feeding rate Decrease the feeding rate 2.oversize teeth selected Change blade with smaller teeth 3.wrong fixture of irregular stock Revise the fixture 4.no match up of blade Test blade firstly High speed rotating of saw blade Lower speed Higher hardness of material Change the saw blade into high hardness Cutting coolant liquid density Increase the density Wrong coolant liquid chosen Change the coolant liquid number Higher feeding rate Lower the feeding speed Higher feeding rate saw blade Sharp sound while Wrong coolant chosen Choose the suitable coolant Unqualified saw blade Change the blade 1.over speed of saw blade Decrease the speed 2. irregular surface of welding joint Grind the welding joint 3. Wrong coolant chosen Change the coolant 4.tolerance between leading box and saw blade Adjust the tolerance again cutting 6
10. Usual major faults and solution 10.1 mechanical parts  Faults Teeth broken  Teeth tip wear off  Harsh Section of  Main...
Geometrical 5.over feeding rate and higher pressure Lower the feeding speed 1.low tension of saw blade Decrease the saw speed 2.split teeth or lower symmetry Change new saw blade 3.far distance between leading bracket and stock Adjust the distance less than 3cm 4.teeth wear out Change saw blade 5. un-perpendicular between saw blade and vise Adjust leading box Low tension of saw blade Tension the saw blade Unbalance driven wheel and driving wheel Adjust the tension nuts 1.bearing broken inside Change bearing 2. abrasion inner hole with the shaft Change the driving wheel 3.Wheel abrasion and reducer damage Change the wheel 4. abrasion of warm bar and warm gear Change the bar or gear 5.out of oil in the reducer box Oil charging 1.low pressure Adjust the relief valve 2.oil route blocking or leaking Clean or change the valve, filter, bracing the accuracy out of tolerance Saw blade drop off Noise of reducer box No manual rising up or auto-rising of saw frame and No or joint descending 3.stroke switch out of service Repair or change the switch 4. wiring failure Check the wire diagram 1.speed-adjust valve blocking Clean or change the valve 2.descending valve out of work Check the oil route 3.High back-pressure Adjust the pressure even descending of saw frame 7
Geometrical  5.over feeding rate and higher pressure  Lower the feeding speed  1.low tension of saw blade  Decrease the sa...
4. valve’s core locking inside Clean the core of valve 5.un-vacuum oil cylinder Discharge the air 10.2 electrical parts: Faults Main reason caused No power supply and solution 1. power source no connecting Connect the power QF1 2. short cut electricity Repair or change the breaker 3.open the emergency stop button Reset the stop button Button broken Change the button Wiring failure Check the wire diagram Button for saw blade broken Repair or change the button Wiring failure Check the wire diagram Stroke switch out of work Repair or Change he switch Limit switch out of work Repair or change the switch Limit nut not in right position Adjust the nut into right position Transformer broken Repair or change the transformer Indicator broken change the indicator oil pump does not work once turning on the main switch Machine when still work pushing the stop button machine does not work when pushing the start button Machine still work after cutting off stock Indicator out of work 8
4. valve   s core locking inside  Clean the core of valve  5.un-vacuum oil cylinder  Discharge the air  10.2 electrical pa...
10.3 hydraulic parts: Faults Main reason caused No Oil pumping Oil foaming solution 1. filter blocking Clean or change the filter 2. low oil level, should be 2-3cm higher Charge hydraulic oil 3.high oil viscosity Change the oil into No.46 1.Low air exhausting Reciprocate moving up and down of saw frame and exhaust the air extremely Wrong rotating direction of 2. Oil leaking Brace the coupling 3.seals leaking of oil pump shaft Chang the sealing ring 4.oil return pipe above oil surface Submerge the oil tube 5.oil pump wear out or broken Chang the pump Incorrect wiring connecting Check the wire diagram 1. oil pump wear out or broken Repair or change pump 2.low oil viscosity Change oil into No.46 3.high oil pressure Adjust the pressure 1.over tolerance between the core of selector valve and valve Repair or change selector valve oil pump High oil temperature Saw frame auto descending at middle level hole 2.sealing ring broken of oil cylinder Repair or change the sealing ring 3.speed-adjusting valve open Close the valve 11. Precautions 11.1 please read the manual books carefully and get to know this machine before operating 11.2 balancing the machine after installation 11.3 choosing the suitable oil according to the environment temperature 9
10.3 hydraulic parts  Faults  Main reason caused  No Oil pumping  Oil foaming  solution  1. filter blocking  Clean or chan...
11.4 ground wiring should be wiring 50cm below the ground 11.5 voltages should be controlled at the range of ±10%, in case damaging the electrical components 12. packing list No. Name Qty 1 Saw blade 1 piece 2 Manual book 1 copy 3 Stock bracket 1 set 4 Up-clamping device 1 set Remark Optional 10
11.4 ground wiring should be wiring 50cm below the ground 11.5 voltages should be controlled at the range of   10 , in cas...
Hydraulic diagram 11
Hydraulic diagram  11
Electrical diagram 12
Electrical diagram 12