Pulling drum of drawing bench

FIELD: wire production by drawing, possibly designs of drawing benches.

SUBSTANCE: pulling drum of drawing bench rotatably mounted in axle and having mechanism for automatically clamping wire end has on one end portion of cylindrical surface of drum annular bead and on other end portion of drum it has annular stepped shoulder. Clamping mechanism includes pair of rings successively mounted on step of shoulder. Inner ring is mounted with possibility of motion along step of shoulder and it is provided with drive unit for rotating it relative to outer ring rigidly mounted in direction opposite relative to rotation direction of drum. Said rings are spring-loaded for providing their mutual contact along end inclined protrusions and recesses. At axial movement of inner ring caused by its rotation it is formed annular clamping space between flat end surface of inner ring and end surface of shoulder.

EFFECT: improved design not needing fixation of drum in predetermined angular position for introducing wire into clamping space, possibility for clamping/unclamping wire at rotation of drum.

4 cl, 3 dwg

 

The invention relates to the production of wire drawing and can be used in the design of the drawbench. A known design of the traction drum, in which the pre-tapered end of the processed wire is passed through fibrous and exhaust clamp in the grip of that chain and hook attached to the drum. Further rotation of the drum the wire stretch rummaging through and wound on a drum (5-6 turns), after which the exhaust clamp is removed from the drum.

These are the traction drums, described, for example, in the book "Handbook of wire drawer" Mbhalati and others, Moscow, metallurgy, 1993., s.

The disadvantages of the known designs are the need for prolonged use of ticks and the associated use of manual labor, and performance drawing mill.

Closest to the claimed traction is the drawing drum mill with the clamp on its cylindrical surface by one of the ends, contains a mechanism to automatically clamp the wire end located inside the drum (see SU 38092, And 31.08.1934).

This known construction also does not eliminate the need for manual labor, which reduces the performance of the drawing equipment, moreover, the input end of the wire clamping the space is quite complicated, requires stopping of the drum and its particular angular position.

The objective of the invention is to improve the manufacturability of the design, automation of the process of tightening the wire and reduce the auxiliary time spent on the winding wire in the process of its production.

In the traction drum drawing mill with collar, made on its cylindrical surface by one of the ends, contains a mechanism to automatically clamp the wire end, in accordance with the invention, from the other end on the cylindrical surface of the annular stepped ledge, the clamping mechanism is made in the form of inner and outer rings that are installed in series on the level of the ledge with a spring-loaded mutual contact on inclined protrusions and depressions, made respectively on their end surfaces, with the inner ring mounted for movement along the stages of the ledge when turning by means of the actuator relative to the outer fixed ring, with the formation of the ring clamping space of the flat end surface of the inner ring and the end surface of the ledge.

The rotation of the inner ring can be made due to the fact that in the inner ring groove, which features a lever, this results in the rotation is made in the form of a hydraulic or pneumatic cylinder, a rod which is connected with the said lever.

Each protrusion and depression can be performed with one inclined surface, and the hydraulic or pneumatic cylinder - dip.

Each protrusion and depression can be performed with two symmetrical inclined surfaces, with hydro or pneumatic cylinder made three position.

When turning on the internal drive, the movable ring is rotated, the mechanical projections slide on the inclined surfaces of the protrusions of the fixed ring, which leads to axial displacement of the rolling ring and the clamp is pre-inserted in the annular clamping area of the wire end.

During the rotation of the traction drum effort drawing, trying to pull the clamped end, additionally rotates the movable ring, which leads to further tightening of the clamp.

After winding 8-10 turns pulling force on the clamped end of the wire substantially decreases, which gives the opportunity to include the drive rotation of the ring in the opposite direction, to effect squeezing of the wire, to transmit it to the next drum or winding device.

Performing mechanism with an annular clamping jaws simplifies the process of entering the end of the wire into the clamping space, as it does not require fixation of the drum in a certain angular position. Clamping and squeezing can be produced as the ri stationary drum, and when it is rotating. The clamping mechanism may have two design decisions.

The 1st option is for non-reversible traction drum. In this case, the end tabs (depression) rings are one of the inclined working surface.

The 2nd option is for traction drum operating in the reverse mode, in opposite directions. In this case, each end tab (depression) rings provided with two symmetrical inclined surfaces. By turning the ring in either direction from the neutral position (when the projections of one ring is fully included into the cavity of another) is offset along the axis and clamp the wire.

Drive rotation of the ring made, for example, in the form of hydraulic (pneumatic) cylinder, attached to the end of the drum and associated with the lever, the end of which communicates with the groove made on the Seating surface of the ring.

In the first embodiment is used to drive off the hydraulic or pneumatic cylinder. In the second embodiment is applied three position hydraulic or pneumatic cylinder.

The springs provide a constant, the contact protrusions of the rings among themselves, which increases the reliability of the device and ensures the return of the inner ring to its original position. The invention is illustrated in the drawings, in which figure 1, 2, 3 shows the traction drum:

figure 1 is a side view,

Fig 2 - type t is Rza,

figure 3 - option run rings for reversing the traction drum.

On the housing 1 of the traction drum set outer ring 2 and inner ring 3. Both rings 2 and 3 are end tabs (depression) 4 with inclined surfaces on which they are in contact by means of springs 5. The projections of one ring correspond to the troughs of the other.

On the body 1 of the drum is made annular stepped ledge b and the working Board in the form of an annular collar 7. Rings 2, 3 is set at the level of the ledge, and the outer ring 2 is fixed and the inner ring 3 located between the ring 2 and the end surface of the ledge, planted freely, so that they can move along the stages of the ledge (axial movement). Flat face of the ring 3 and the end face of the ledge 6 of the drum fulfil the function of a clamping jaw, forming an annular clamping space 8.

In a variant irreversible traction drum end tabs (depression) 4 have one inclined working surface.

In the case of reversible traction drum every ledge (depression) 4 have two symmetrical sloping surface (see figure 3).

Movable inner ring 3 has a landing on the surface of the groove 9, in which, through a radial window in the casing 1 is the end of the lever 10, mounted free on the shaft (axis) 11 drum.

The lever 10 is connected with the rod hydro (pneum is) of the cylinder 12.

The described device operates as follows.

In the initial position (when stopped or rotating drum) stock hydro (pneumatic) cylinder 12 is retracted, the ring 3 use the lever 10 is located so that its protrusions 4 under the action of springs 5 fully go into depression at the end of the ring 2. This flat face of the ring 3 is in the left end position at a maximum distance from the face of the ledge 6 of the casing of the drum, i.e. sponge unclenched. To perform the operation torque of the processed wire, its pointed end is passed through the hole drawing dies (not shown), is introduced into the annular clamping space 8. Next include hydro (pneumatic) cylinder 12, his rod sucked, rotates the lever 10, which leads to the rotation of the ring 3. While tabs (depression), 4 rings, 3 slide on the inclined surfaces of the reciprocal projections (depressions) 4 ring 2, which leads to axial displacement of the ring 3 to the right, along the level of the ledge, and clamp the wire end. The rotating body 1 of the drum creates a force drawing, trying to pull the clamped end. This force causes additional rotation of the ring 3 in the direction opposite to the rotation of the drum, which leads to further tightening of the clamp.

In the beginning of the process of drawing, due to the fact that the clip is located at a distance of 8-10 diameters provolo and from the working side of the drum, and the trail is across the Board, wrap the branch wire is moved from the clamp to the operating Board, after which comes the established process of drawing. It is characterized by the fact that the incident branch wire, sliding on desktop Board drum, supersedes the previously wound coils, moving them in the direction of the clip. Increasing the number of turns, the force tending to pull the end of the wire from the clip, drops sharply, so after winding 8-10 turns can be pressed to send the wire end in the following drawing group, or in a winding machine.

The extraction is made by the inclusion of hydraulic (pneumatic) cylinder for retraction of the rod, the ring 3 is rotated by the lever 10 in the direction of rotation of the drum, and simultaneously shifted by the spring 5 in the direction of the ring 2, freeing the end of the wire.

In a variant design of the reversing drum operation of the device is as follows: in the initial position (clamp uncompressed) stock hydro (pneumatic) cylinder is in the middle position. In the exercise of the clamp rod is moved in one of the extreme positions, which leads to the rotation of the ring 3 in the direction opposite to the rotation of the drum, slide one of the surfaces of the projections of the rings. During the rotation of the drum in the opposite direction the piston rod of hydraulic (pneumatic) cylinder set is the other extreme position, bringing the other of the pair of inclined surfaces of the projections of the rings.

In both cases, the axial displacement of the ring 3 and the clamp end of the wire with its self-tightenings.

Thus, the invention provides improved manufacturability of a design by eliminating the need for fixation of the drum in a certain angular position for entry of the wire into the clamping space, the possibility of a clip and pressing while rotating the drum. In addition, the device allows you to automate the process of tightening the wire and reduce the auxiliary time required for winding the wire in its production process.

1. Traction drum drawing mill with collar, made on its cylindrical surface by one of the ends, contains a mechanism to automatically clamp the wire end, wherein another end on the cylindrical surface of the annular stepped ledge, the clamping mechanism is made in the form of inner and outer rings that are installed in series on the level of the ledge with a spring-loaded mutual contact on inclined protrusions and depressions, made respectively on their end surfaces, with the inner ring mounted for movement along the stages of the ledge when turning by means ol the water on the external, fixed ring with the formation of an annular clamping space of the flat end surface of the inner ring and the end surface of the ledge.

2. The drum according to claim 1, characterized in that in the inner ring groove, which features a lever, the actuator rotation is made in the form of a hydraulic or pneumatic cylinder, a rod connected with the said lever.

3. The drum according to claim 2, characterized in that each protrusion and a depression is made with one inclined surface, with hydro or pneumatic cylinder is made off.

4. The drum according to claim 2, characterized in that each protrusion and a depression is made with two symmetrical inclined surfaces, with hydro or pneumatic cylinder made three position.



 

Same patents:

The invention relates to drawing production and is intended for use in wire drawing machines with slip

The invention relates to drawing production, specifically to the structures of the traction drums drawing mill

FIELD: wire production by drawing, possibly designs of drawing benches.

SUBSTANCE: pulling drum of drawing bench rotatably mounted in axle and having mechanism for automatically clamping wire end has on one end portion of cylindrical surface of drum annular bead and on other end portion of drum it has annular stepped shoulder. Clamping mechanism includes pair of rings successively mounted on step of shoulder. Inner ring is mounted with possibility of motion along step of shoulder and it is provided with drive unit for rotating it relative to outer ring rigidly mounted in direction opposite relative to rotation direction of drum. Said rings are spring-loaded for providing their mutual contact along end inclined protrusions and recesses. At axial movement of inner ring caused by its rotation it is formed annular clamping space between flat end surface of inner ring and end surface of shoulder.

EFFECT: improved design not needing fixation of drum in predetermined angular position for introducing wire into clamping space, possibility for clamping/unclamping wire at rotation of drum.

4 cl, 3 dwg

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