SU1530287A1 - Machine tool for making parts with two bent ends ,particularly, bicycle handle bars - Google Patents

Abstract

The invention relates to the processing of metals by pressure and, in particular, for the manufacture of parts with two curved ends, preferably the handlebars. The purpose of the invention is to expand technological capabilities by adjusting the distance between the centers of the bend and simplifying the removal of products. The machine contains the flexible ends and the middle part of the workpiece mounted on the frame. The machine is equipped with a mechanism for transferring the workpiece between the nodes are flexible (H). After the T ends, according to the templates, the workpiece is transferred by the transmission mechanism from the drive cylinder 22 to the next position G. At the same time, the bent ends of the workpiece are guided into spring-loaded guides. The middle part of the workpiece is carried out according to the pattern with bending rollers. In this case, the middle part is fixed by an abutment connected with the rod by the power cylinder. The bending rollers have a screw mechanism for adjusting the distance between their axles and are pivotally connected with their arms to the body of the ram. The machine makes it possible to manufacture parts in which the ends are bent at an angle of 90 ° and the centers of the bend radii are close to the centers of the bend radii of the middle section. 4 il.

Description

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Sn Rectifier with a rod power cylinder. The bending rollers have a screw mechanism for adjusting the distance between their axes and are pivotally connected with their arms to the power case.

cylinder. The machine makes it possible to manufacture parts in which the ends are bent at an angle of 90 and the centers of the bend radii are close to the centers of the bend radii of the middle section. 4 il.

The invention relates to the processing of metals by pressure, in particular to the production of parts with two curved ends, mainly bicycle handlebars.

The aim of the invention is to expand

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Rhenium technological capabilities of the machine by ensuring adjustment of the distance between the centers of the bend and simplifying removal.

Fig, 1 shows the machine, a general view; figure 2 is a view of And figure 1; on fig.Z - section bb In figure 1: on figure 4 section bb In figure 2.

The machine consists of the frame 1 and the nodes installed on it are flexible ends and the middle part of the workpiece.

The flexible end assembly consists of hydraulic cylinders 2 and 3 installed on the bed 1, gears 4 and 5 are attached to their upper flanges, consisting of gear racks that are extensions of the hydraulic cylinders 2 and 3. With the gears of gear reducers 4 and 5 with gearing rigid gears on shafts 6 and 7. At the outer ends of the shafts 6 and 7, templates 8 and 9 are freely mounted and levers 10 and 11 are rigidly fixed with fingers 12 and 13, on which bending rollers 14 and 15 are freely attached. Vertical hydraulic cylinders 16 and 17 are attached to gearboxes 4 and 5, which drive two-arm levers 18 and 19 rotating on their axes. On the upper bolts of the gearboxes 4 and 5 there are pivotal spring-loaded guideways 20 and 21 with grooves for orientation of the workpiece.

On the bed 1 between the hydraulic cylinders 2 and 3, there is a mechanism for transferring the workpieces, consisting of a hydraulic cylinder 22, on the rod of which is mounted a traverse 23 with prisms 24 and 25, and their axes of symmetry lie in the same plane with the axis of symmetry of the streams of patterns 8 and 9 To the gearboxes 4 and 5 are attached pivoting on horizontal axles spring-loaded stops 26 and 27.

On the base 1 on the racks 28 and 29 on above the flexible ends of the node is placed a flexible section of the middle part, which contains an inclined hydraulic cylinder 30 fixed to the rack 28 with a template 31 on the rod, and on the rack 29 is installed a hydraulic cylinder 32 with an emphasis 33 on the rod , so that when the template 31 comes into contact with the stop 33, their profiles form a circle with a diameter equal to the diameter of the workpiece.

Levers 36 and 37 are hinged by means of pins 34 and 35 on the hydraulic cylinder body 32. At opposite ends of levers 36 and 37, bending rollers 40 and 41 are mounted with the possibility of rotation with the possibility of rotation, so that the axes of symmetry of the profiles of their streams lie in the same plane with the axis of symmetry of the profiles of the straps of the template 31 and the stop 33. Levers 36 and 37 are interconnected by means of a screw 42 with left and right threads and nuts 43 and 44 hinged in the levers 36 and 3. 7. And the middle part of the screw 42 mounted for rotation District longitudinal axis of the rack 45 of the hydraulic cylinder 32. The tubular blank 46 to stop the machine working area 47 is provided.

The machine works as follows.

The machine operates in automatic mode, therefore all the positions of the mechanisms are blocked by electrical sensors. In the initial position, the levers 10 and 11 are positioned vertically, the two shoulders levers 18 and 19 are rotated to the upper position. During operation, the workpiece 46 is fed into the machine through the tray by stopping 47. The hydraulic cylinders 2 and 3 are turned on, their rods are pulled in, the gears meshing with them rotate, the shafts 6 and 7 of these gears turn and with them the levers 10 and 11 bearing on the pins 12 and 13 bending rollers 14 and 15. At the same time, the hydraulic cylinders 16 and 17 are turned on,

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the two shoulders levers 18 and 19 rotate and press the workpiece 46 to the radius of the streams of patterns 8 and 9. Both ends of the workpiece 46 are flexible by 90. Then the movement of the rods of the hydraulic cylinders 2 and 3 reverses: the levers 10 and 11 with the bending rollers 14 and 15 take a horizontal position . The movement of the rods of the hydraulic cylinders 16 and 17 is reversed. With this, the levers 18 and 19 move away from the workpiece 46 to their original position. The hydraulic cylinder 22 is turned on, its rod with crosshead 23 rises and the prisms 24 and 25 pick up the workpiece from below and lift it. When the trewers 23 move upwards, the workpiece 46 with 90 ends bent away is oriented in the grooves of the rotary rails 20 and 21, while pressing the spring-loaded stops 2 and 27, and when the hydraulic cylinder 22 returns to the 23 23 downward, the stops 26 and 27 occupy the initial position and the workpiece is held by them in the upper position. The hydraulic cylinders 2 and 3 are turned on and the levers 10 and 11 are in the vertical initial position. The hydraulic cylinder 32 is turned on, its rod together with the stop 33 extends until its radius surface approaches the workpiece 46. The hydraulic cylinder 30 is turned on, its rod moves forward, and the template 31 fixed on it moves to the workpiece 46. With further movement of the template 31, the workpiece 46 abuts bending rollers 40 and 41, mounted by means of a screw 42 on the required size

details, its middle part deforms — expansion of technological possibilities; the ends of blank 46 bent at 90 rotate around their axes the spring-loaded rotary directions 20 and 21; the working fluid is squeezed out of the piston cavity of the hydraulic cylinder 32 by the piston through the hydraulic valve of the hydraulic system of the machine adjusted to the required value press the stop 33 against the bent blank 46. In this case, the stop 33 works as an elastic element. Constant pressing of the abutment 33 of the preparation 46 to the pattern 3t during bending ensures complete match of the configuration of the workpiece with the geometric shape of the pattern. The stroke length of the hydraulic cylinder rod i 30, and hence the magnitude of the billet, is regulated by the position of the electric cylinder.

Because of the provision of adjusting the distance between the centers of bending and simplifying removal, it is equipped with a mechanism for transferring the workpiece between the node-ds NDi bending, made in B1ade of the power cylinder with a cross-beam mounted on its rod with prisms whose planes of symmetry are located in the plane of symmetry of the streams of patterns

flexible ends assembly, the bending rapids drive of the flexible ends assembly is made in the form of two gears and hydraulic cylinders connected to their drive shafts; the middle part flexible assembly is installed with the help of racks on the frame above the flexible ends assembly at a height not less than the diameter of the flexible ends assembly template; pivoting spring guides with grooves for ori50

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hydraulic cylinder

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At the end of the bending of the workpiece, the stock of the hydraulic cylinder 32 advances, the abutment 33 abuts against the workpiece and pushes it out of the bending zone by. the delivery tray of finished parts, the a-rod of the hydraulic cylinder 30 with template 31 moves to the initial position. The bent part is removed from the machine and a new billet is fed into the vertical bending zone. The cycle of operation is repeated.

The application of the invention expands the technological capabilities of the machine, as it allows to produce parts whose ends in the vertical plane are bent at a 90 ° angle.

20 and the centers of the radii of vertical bends are much closer to the centers of the radii of oblique bends, i.e. parts with any distance between the centers are flexible. In addition, it simplifies the removal of parts from the machine.

Claims (1)

Invention Formula d thirty 35 The machine for the manufacture of parts with two curved ends, predominantly the steering wheels of bicycles, containing a flexible end assembly mounted on the frame, with disc patterns with brooks on the side surfaces and driving bending rollers, as well as a flexible portion of the flexible part on levers with bending rollers and smelling with the emphasis on the fact that, with the aim technological expansion possible Because of the provision of adjusting the distance between the centers of bending and simplifying removal, it is equipped with a mechanism for transferring the workpiece between the node — with NDi bending — made in the V1ade of the power cylinder with a cross bar mounted on its rod with prisms whose planes of symmetry are located in the plane of symmetry of the streams of patterns flexible ends assembly, the bending rapids drive of the flexible ends assembly is made in the form of two gears and hydraulic cylinders connected to their drive shafts; the middle part flexible assembly is installed with the help of racks on the frame above the flexible ends assembly at a height not less than the diameter of the flexible ends assembly template; rotary spring-loaded guides with grooves for orientation five the orientation of the workpiece placed on the gearboxes of the flexible ends assembly, with an additional power cylinder, the stem of which is connected to the stop, the stop is made with a stream groove, the plane of symmetry of which profile is located in the plane of symmetry of the pro 15302878 The leu of streams of the template and bending rollers of the node are flexible in the middle part, while the levers of the bending rollers are hinged on the body of the additional power cylinder with the possibility of adjusting the center-to-center distance of the rollers. "five figure 1