SU679299A1 - Rope tackle press - Google Patents

Description

I

The invention relates to forging and pressing machinery.

A known polyspied press comprising two cross-members located on the frame, one of which is mounted with the possibility of axial movement from a flexible force-bearing element connected to a drive, wound in a row in a spiral along rollers placed on crossbars.

However, in a well-known press, the friction losses in the roller bearing assemblies are significant, reducing: HF and the total pressure of the press.

The purpose of the invention is to increase the effort

This goal is achieved by the fact that the press is equipped with an additional drive mounted on each crossmember with a distributor shaft located in the crown supports parallel to the axis of the rollers, this additional drive shafts are kinematically connected to roller gears and star gears mounted on the camshaft and rollers.

FIG. 1 shows a polyspast press, general view; in fig. 2 is a diagram of the connection of an additional drive with rollers; Fig. 3 is a plot of the distribution of linear speeds of movement of the branches of the rope.

The press consists of a fixed 1 and a movable 2 cross, an additional

the drive mounted on the crossbars and made in the form of an electric motor 3 and a gearbox 4. Electric motor 3 cwg cutting gear 4: cx is united by a coupling 5 with a camshaft 6. The shaft 6, mounted in bearings 7 of crossmembers 1 or 2, is equipped with sprockets 3 gears, which It is associated with the corresponding asterisks 9 of the roller-roller guide. Asterisks are rigidly connected to

rollers 10 fixed on axles x 11 in bearings 12.

Claims (1)

The press works as follows. For the ocytoe body of the approach stroke, the main drive drums are driven into rotation. A rope covering the upper and lower fixed crossbeams in several turns is wound on drums and you move, the upper crossmember. On the course approx & Due to the absence of a load on the press slide, the additional drive is turned off. With the commencement of the working stroke on command, the Prnmer from the limit switch, the electric motor 3 is turned on and through the gearbox 4 and the coupling 5 rotates the camshaft 6, Sprockets 8, mounted on the shaft 6 through the chain the gears and their corresponding sprockets 9 are driven by the rollers 10 of the roller cable wiring. On the return stroke, the additional drive is turned off. The power of the additional drive is designed to compensate for the loss of friction in the bearings of the cable-roller wiring. | friction in slider rails, deformation of the rope, interacting with the roller. Each branch of the rope, interacting with the rollers, has its own characteristic linear velocity, in accordance with which the gear ratio between the sprockets, the camshaft and the roller is selected. The magnitude of the linear velocity of each branch of the rope is determined from the following conditions, 1, The branches of the rope connected to barat tanks have the same linear speed with them. The magnitude of the linear velocity of the outermost branch of the rope is determined by the formula Vjr2) rt Vrf, where 13 is the diameter of the drive drum; and - the number of revolutions of the drum; linear drum speed, 2. The middle of the rope is fixed; 3. The law of distribution of linear displacements of the branches of the rope, as in any palispastnym mechanism, linearity, the plot of the distribution of c1; oros shown in fig. 3, V ,, V, UZ .. V .. ..V.C-4 - values of non-linear velocities of the rollers; 6 9 p ... k -1 - the standard 4,2,3 .. the number of the ryulik; i ... s. - lengths of canal Pf 1 and from ser & dyne to corresponding ryulik ;. t is the total length of the rope; - the length of the rope from the middle to the drum. Then, from the rule of similarity, the linear velocity of the ith roller will be equal to v. Since the ratio remains constant during operation, the linear velocity of the nth roller is also constant. The ratio of the linear velocities of the drum is. On the roller - there is a gear ratio: V5 to v "y" t ". In the proposed press design, forced rotation, the rollers compensates for losses in bearings, knots, which allows for 30% increase in the force of the press while maintaining its dimensions. The formula was invented and a polyspast press containing two crossmembers located on the frame, one of which is installed with the possibility of axial displacement from the flexible force element connected to the drive, which is spiral wound along rollers placed on the crossbars, characterized in that: increasing the force of the press, it is equipped with an additional drive mounted on each crossmember with a camshaft located in the bearing supports parallel to the axis of the rollers; anes to said rollers by means of chain and sprocket gear mounted on the camshaft and a roller. Sources of information taken into account in the examination 1, USSR Author's Certificate No. 277548, class, B 21 J 9 / O2, 197О. 9 12 X 12  d.2