Italian TME transmission arm - transmission spindle - long sealing tool life

Italian TME transmission arm - transmission spindle - long sealing tool life

Our company has the advantage of supplying TME sealing knives 006599000060660000, TME transverse sealing drive spindle PN: 00042700-R0001, TME spindle drive arm PN: 00042700-R0001, TME plug-in drive arm PN: 00042600-R000. We believe that everyone is a bit unfamiliar with TME, which is now used in many industries due to its low price and long service life. It is a very cost-effective product. Now our company has become their long-term partner, and we have advantages over other traders in terms of price and delivery time. Welcome customers to find us!

ItalyTME transmission arm

1. Control valve 1; 2. Control valve 2; 3. Pre selection knob for spindle speed; 4. Pre selection knob for spindle feed rate; 5. 6, 7 Three position hydraulic cylinder piston; 8. Limit card ring; 9. Brake hydraulic cylinder; 10. Spring; 11. Brake friction clutch; 12. Reverse friction clutch; 13. Fork shifting; 14. Positive rotation friction clutch; 15. Reverse hydraulic cylinder; 16. Reverse hydraulic cylinder piston; 17. Forward rotating hydraulic cylinder piston; 18. Forward rotating hydraulic cylinder; 19. Control joystick; 20. Spring; 21. Pre selection valve for spindle speed; 22. The pre selection valve for spindle feed rate is shown in Figure 3, which shows the position of the piston rod in the variable speed cylinder with a speed of 125 r/min and a feed rate of 0.4 mm/min. At the same time as the pressure oil flows into the pipeline ④ of the D-D section, it flows into the b-hole and c-hole of the E-E section valve 2 from the center hole and cross hole of valve 1, as shown in the variable speed E-E section, and then through the pipelines ⑥ and ⑤ of the A-A section, it flows into the oil cylinders 15 and 18. Due to the larger diameter of piston 17 than piston 16, a pressure difference is generated, and piston 17 drives the shift fork 13 to slowly move upward, gradually tightening the main shaft positive transmission friction clutch 14, connecting the transmission chain from the main motor to the main shaft, causing the main shaft to rotate slowly, which is called "slow speed". The purpose of slowing down is to enable the sliding gear to enter the meshing position relatively smoothly, while avoiding the occurrence of tooth tip phenomenon.

If the handle 19 is moved downwards to the shifting position and the spindle has started to rotate, it indicates that the pistons in each shifting cylinder have moved completely, the sliding gears have moved to a new position and entered the meshing state, and the shifting has been completed. At this point, release handle 19, and under the action of spring 20 on valve 1 rod, it will automatically reset to the spindle parking position, and then you can start driving (forward or reverse) for work. Due to the restoration of valve 1 and valve 2 to the forward or reverse position of the spindle, the oil circuit to the pre selection valves 21, 22 and the upper and lower chambers of each variable speed cylinder is cut off, and each sliding gear works under its respective spring positioning.

2.5 Spindle Neutral

In the neutral position of the spindle, move handle 19 upwards to the neutral position of the spindle. Valve 1 is displaced downwards relative to valve 2 by one position, that is, the A-A to E-E sections of valve 1 in Figure 3 are moved downwards relative to valve 2 by one position. The cross-sectional shape of valve 1 in the B-B section should be the cross-sectional shape of valve 1 in the A-A section, the cross-sectional shape of valve 1 in the C-C section should be the cross-sectional shape of valve 1 in the B-B section, and so on. The pressure oil output from the oil pump flows through pipeline ② to hole a of C-C section valve 2, and then through the oil circuit of the control valve, it finally flows into pipeline ⑦ of D-D section, referring to the neutral D-D section of the main shaft. At the same time, it flows into the upper and lower chambers of the three position cylinder. The piston 7 in the upper chamber pushes down on piston 6 until piston 7 is limited by the retaining ring 8. The piston 5 in the lower chamber moves upward and meets piston 6, but cannot push back on piston 6 because the area of piston 5 is smaller than that of piston 7. At this time, the sliding gear on the VII axis is in the middle disengaged position, which allows for easy rotation of the main shaft. At this time, the oil in the g chamber flows into the axial groove and annular groove of the D-D section valve 1 through the pipeline ④, and together with the d hole of the valve 2, flows through the transverse hole of the C-C section valve 2 and pipeline ③, passes through the splitter for lubrication, and finally flows back to the oil pool. If piston 6 moves from the lower position to the middle position, the oil in chamber f flows back to the oil pool through the oil pipe and pre selection valve 21. When the spindle is undergoing variable speed, forward rotation, reverse rotation, or in neutral state, the hydraulic system not only uses oil to maintain the original state, but also lubricates the various components of the spindle variable speed and feed variable speed transmission system through the relief valve and spindle control valve.

3. Fault analysis

The common causes of machine tool failures include gear teeth, gear shaft bending, deformation or breakage, and failure of sliding gear positioning spring clips. These mechanical failures can cause gear meshing to not be in place, resulting in "loss of rotation" and chaotic speed. At the same time, insufficient oil supply pressure or system oil leakage or air mixing in the hydraulic system can affect the stroke of the hydraulic cylinder piston that controls the displacement of the sliding gear, and also cause the spindle to "lose rotation" and confusion. When the springs inside cylinders 15 and 18 break, causing insufficient travel of the shift fork or overheating of the friction plate, shortening the clearance, and increasing the shift fork travel, the shift fork cannot press the friction plate tightly, resulting in slow forward and reverse starting of the machine tool and insufficient output torque. If it appears at cylinder 9, it will cause brake failure. In addition, there are bearings, seals, hydraulic valves, and cleanliness of oil.

Italian TME transmission arm - transmission spindle - long sealing tool life