SU430933A1 - MECHANISM OF TRANSFER OF MULTI-POSITIONAL HEARTING AUTOMATAFONDBIS; - Google Patents

Description

one

The invention relates to the field of forge and press equipment and can be used in multi-position landing machines that produce, for example, fasteners.

A mechanism is known for the transfer of a multi-position landing machine, and a movable carriage with supported spring-loaded grippers. However, in this mechanism, due to the vibration of the spring, blanks fall out of the grippers.

The purpose of the invention is to reduce vibrations in the grippers.

The proposed mechanism, in contrast to the known, is equipped with sectors mounted above the springs of each grip on rigidly mounted on the carriage sectors made of elastic material along the profile of the outer surface of the spring and in contact with it during operation.

FIG. 1 shows the described mechanism, side view; in fig. 2 is a view along arrow A in FIG. one; in fig. 3 shows a section along B - B in FIG. one; in fig. 4 shows a section along B-B in FIG. 3; in fig. 5 shows a section along G - D in FIG. one; in fig. 6 shows a section through D - D in FIG. one; in fig. 7 shows a section along E - E in FIG. 2

The body 1 of the transfer mechanism is bolted 2 to the frame 3 of the automaton 4. On one side of the plate attached to the frame, there is a bore in the body through which the cam shaft 5 passes, driving the double arm 6 ruler 7, interacting with the rollers 8 levers 9 leading the (opening) axles 10, on which the clamps 11 are planted; the latter are double shoulders, one shoulder has a clamping device 12 for gripping, and the other shoulder has an axis 13 on which clamping spring 15 is suspended at one end through the end of the spring, and the other end of the spring is connected to the other shoulder of the same suspension . The axes of rotation of the grippers are located in the supports of the carriage 16, which in turn is placed on the guide bodies 1. There are cutouts in the upper part of the body to accommodate the pressure arm of the double-arm lever 6. There is also a pressure bar 7, which through two spring hangers (Fig. 7) ), consisting of a rod 17 with a collar 18 and a spring 19, all the time attracted upwards. In the lower part of the housing there are special bores for accommodating a damping device (Fig. 6), consisting of a rod 20 with a bearing washer 21 for a spring 22. At the end of the stem there is a bar 23, one end of which interacts with the stop screws 24 with the carriage and the other the end with the hole slides over the latch 25.

To dampen the vibration in the spring (Fig. 3 and 4), a bracket 26 is attached to the carriage 16, the upper part of the bracket is bent at an angle of 90 ° to the vertical stand of the bracket, and this limb is located directly above the clamp, a different 15. On the bent part the sector 27 is fastened (e.g., with screws), the lower part of which in the longitudinal direction (Fig. 3) is shaped along the radius R chosen depending on the distance of the meled by the points of the spring suspension in a compressed state. In the transverse direction (Fig. 4), the same surface is profiled along the radius r, equal to the outer radius of the spring. In the manufacture of a sector of elastic material, such as rubber, this radius may be less than the outer radius by the value of Dg 0.1 - 0.3 mm. The sector is positioned so that when the spring is compressed (i.e., when the workpiece is clamped), it rises and fits the sector, which then bends the spring, forming a certain deflection arrow a. Lining the profile part of the sector, the spring is applied to it with some force, arising, and at the same time the force of friction between the coils of the spring and the profile surface of the sector prevents the oscillatory movements of the coils of the spring, thereby eliminating the oscillatory movements of the grips.

The transfer mechanism works in the following way. In the initial position (Fig. 2) of the carriage 16, after ejecting the stamped part from the dies for a certain amount, the clamps are closed and the part is gripped with the force of the springs 15. The springs contact the sectors 27, and the clamping is carried out without vibrations. The tick closure movement is transmitted from the camshaft 5. At this time, the roller of the two shoulders lever 6 escapes from the protruding part of the cam, the lever rotates under the action of the spring, while the other lever arm rises and allows the spring suspensions of the ruler 7 to lift it by the amount b, releasing levers 9 grips, through which they were held in the decompressed state. After releasing the levers of the grippers, the compression springs clamp the grippers with the blanks. At a certain time, the carriage moves to the opposite position from the initial position. This movement is equal to the distance between the matrices and is strictly fixed by the stops 28. The drive of the transfer mechanism is adjusted to the same distance.

However, during all the time of operation, gaps are formed in the joints of the drive mechanism that cause the carriage itself to vibrate when it stops in the extreme positions. Spring dampers are installed to pre-neutralize the gaps next to the stops. At some distance from the fixed stop, the carriage encounters the stop screw 24 of the damper, and all the gaps

in the joints of all links from this stop to the drive cam of the drive mechanism are selected; Thus, the carriage approaches the fixed stop, strictly following the law of motion incorporated in the profiling

cam drive mechanism. Such dampers are installed in both extreme positions of the carriage. So, upon the arrival of the carriage in the opposite position from the initial position, the blanks transferred to the new positions of the workpiece, mounted on the slider of the machine, are pushed into the dies. After pushing the blanks to 1-2 diameters, the grippers are opened. They are also released from the camshaft. At this time, the two-arm lever rolls over the protruding part of the cam and squeezes, the second lever arm presses the ruler 7, overcoming the force of the suspension spring and the force of the clamping lever springs, and expands them.

At this time, stamping of blanks at new positions takes place. At the first position is a cut billet with a cutting knife. After the punches are removed from the dies by an amount equal to the thickness of the grips, the carriage

the drive mechanism is brought back to its original position. The grippers at this time are in the unclamped state. After stopping the carriage in the initial position, the mechanism is prepared to repeat the described cycle.

Subject invention

The transfer mechanism of a multi-position automatic dispenser containing a movable

a carriage with spring-loaded grippers mounted on it, characterized in that, in order to reduce vibrations in the grips, it is provided with sectors made of an elastic material along the profile of the outer surface of the spring and contacting with it in the process of mounting the springs of each gripper work.

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D-A (turned)

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