JPS6219363Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a refueling mechanism for a roll stand of a cold pilger mill.

As shown in Fig. 1, the basic mechanism of the cold pilger mill is that the main tube 20 is repeatedly rotated in the cold by the forward and reverse reciprocating motion of the roll 3 having a tapered mandrel 18 and a tapered semicircular caliber groove 19. This is a rolling machine for drawing tubes. In addition, in the figure, 21 is a die holder and a roll shaft. The roll die is built into a roll stand frame 1 as shown in FIG. 2, and the reciprocating movement of the roll stand is performed by a connecting rod 2 connected to a crankshaft (not shown). As shown in Figure 3, a roll stand generally has two legs 4 with some parts sticking out laterally.
It has sliding liners 5, 5', 5'' attached to its lower, side, and upper surfaces, which ride on the bed liner 7 attached to the bed 6, and the upper and side surfaces are also restrained so that it cannot slide. It performs reciprocating motion.The cycle and stroke of reciprocating motion vary depending on the size of the mill itself, but are approximately 50 to 200 times/min and approximately 50 to 100 cm, respectively.
It is. Lubrication of moving parts is thus most commonly accomplished using flexible hoses. Flexible hoses have traditionally been used in cold pilger mills, but as mentioned earlier, the roll stand moves violently, causing early damage to the hose itself and the joint, which requires considerable time and expense to repair. Additionally, because the mill cover was damaged, it was difficult to detect oil leaks due to damage, and this often led to serious accidents due to lack of lubricating oil. Another method is to guide the oil path from the oil holes in the crankshaft and crank pin to the outer surface of the connecting rod, and then send oil to the roll stand using an oil tube that runs along the outer surface of the connecting rod. Although it is superior to flexible hydraulic hoses, the route is complicated and very long, and the swinging of the connecting rod must be absorbed by some means at the connection point from the final end of the connecting rod to the roll stand. have.

The present invention was developed in view of the above, and its gist is that a roll stand with sliding liners on its feet rides on two fixed bed liners and performs reciprocating motion, and the bed liners and In a type of cold pilger mill where lubrication between the sliding liners is carried out by forcibly supplying oil to oil grooves dug so as to intersect with each other on the sliding surfaces of both, the ceiling or side surface of the oil groove on the side of the sliding liner is A cold pilger mill characterized in that a conduit is provided leading from the part to the outside, and the outlet of the conduit and the oil supply port of each part of the roll stand are connected by an oil pipe directly or via a distributor in the middle. This is the oil supply mechanism for the roll stand.

Next, the mechanism of the present invention will be explained in more detail with reference to embodiment drawings. Fig. 2 is a front view of a roll stand of a cold pilger mill equipped with an oil feeding mechanism according to the present invention, and Fig. 3 is a side view of Fig. 2, showing the rack and side guide 16 in Fig. 2.
This is a diagram with . In these figures, 1 is the roll stand, 2 is the connecting rod, 3 is the roll, 4 is the foot of the roll stand, 5, 5', 5'' is the sliding liner attached to the foot, 6 is the bed frame, and 7 is the This is a bed liner attached to a bed frame.Oil grooves 8 and 9 are cut into the surfaces of the sliding liner 5 and the bed liner 7 facing it, respectively, as shown in FIGS. 4 and 5. Both oil grooves intersect anywhere within the movable range of the roll stand.Generally, a guide hole 10 is formed in a part of the oil groove 9 of the bed liner to penetrate to the outside. Oil is supplied by an external pump, and both oil grooves are constantly filled with lubricating oil to lubricate the liner surface.The present invention uses these oil grooves to supply oil to the roll stand, Drill a guide hole 11 leading from a part of the oil groove 8 of the sliding liner 5 of the two legs to the outer surface of the roll stand frame at an appropriate location, and run an oil pipe from there to each oil filler port, especially the oil filler port 12 of the roll shaft bearing 17. 13.In the case where there are multiple refueling locations as in this embodiment, it is desirable to insert a distributor 14 in the middle of the piping.Furthermore, in this embodiment, in order to balance the left and right hydraulic pressure and flow rate. A balance pipe 15 is inserted between the left and right distributors 14 and 14'.This is not essential, but it is effective.In other words, this not only balances the oil amount, but also connects either the left or right pipe. This is because even if one becomes clogged, oil will be supplied from the remaining one, and it also serves as a safety device.

The lubricating oil path in the cold pilger mill equipped with the oil supply mechanism of the present invention is from the oil supply pump (not shown in the drawings) to the guide hole 10, the bed liner oil groove 9, the sliding liner oil groove 8, the guide hole 11, and the oil pipe 1.
3. The used oil flows through the distributor 14 to the roll shaft bearing 17 and other necessary locations, and the used oil flows down to the oil sump provided under the mill and is filtered, and then reaches the oil supply pump again through a circulation path. Become. If it is necessary to adjust the amount of oil, normal means such as adding an appropriate adjustment valve may be used.

As mentioned above, the refueling mechanism of the present invention has many features such as a short path, extremely low manufacturing cost, high safety, and almost no maintenance cost, and is suitable for use in cold pilger mills. This greatly contributes to cost reduction.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the basic principle of the cold pilger mill, Figure 2 is a front view of the roll stand of the cold pilger mill equipped with the oil supply mechanism of the present invention,
Figure 3 is a side view of Figure 2 with some parts removed.
FIG. 4 is a diagram showing the oil groove of the sliding liner, and FIG. 5 is a diagram showing the oil groove of the bed liner. 1: Roll stand frame, 3: Roll,
5: Sliding liner, 7: Bed liner, 8, 9: Oil groove, 10, 11: Guide hole, 12: Oil supply hole, 14: Distributor, 15: Balance piping, 1
6: Rack and side guide, 17: Roll shaft bearing.

Claims (1)

[Scope of utility model registration request] A roll stand with sliding liners on its feet rides on two fixed bed liners and performs reciprocating motion, and lubricates between the bed liners and sliding liners so that their sliding surfaces cross each other. In cold pilger mills that forcefully supply oil to oil grooves dug in A refueling mechanism for a roll stand of a cold pilger mill, characterized in that the refueling ports of each part are connected by an oil feed pipe either directly or via a distributor in the middle.