SU745572A1 - Sheet bending roller-type machine - Google Patents

Description

The invention relates to the processing of metals by pressure, and more specifically to the tamping process by rolling the method from sheet blanks of tubular parts / 1, and can be used in the aviation, rocket, automobile industry, as well as in chemical engineering; The known sheet bending roll machine, which allows to obtain a closed loop shell 1 in one pass. The machine contains a lower roll formed with an elastic coating, such as polyurethane, an upper rigid bending roll relative to which the part is rolled by passing a sheet blank between them after the rolls are rolled up using a special mechanism with hydraulic drive. The diameter of the part to be manufactured is hereby determined by the amount of penetration of the rigid bending roll with the sheet stock into the elastic coating of the forming roll. Due to the closure of the part contour, its removal is carried out by retracting the bracket in the vertical plane of one of the supports of the flexible roll. Due to the considerable radial forces required by the deformation of the elastic coating of the forming roll, there is a certain lower limit for the diameters of the parts obtained, limited by the base stiffness of the upper roll (Tajc, on the bending machine I 2314 the minimum diameter of the upper / bending roll for a length of 2000 mm is 200 mm). Lime is also a sheet bending machine, in which the bending roll mandrel is located between three or two elastic forming rolls and, thus, is unloaded from the bending of the forces 2. This allows a significant reduction in the lower limit of the diameters produced by g & t hoists. The formation of a closed tubular part is carried out by winding the sheet stock on a flat forking roller, which determines the diameter of the part to be produced. The support in which this roll is mounted in the machine supports only one of its ends, the other end of the roll-mandrel is free. The working process of converting the forming rolls and their cultivation is carried out using a special mechanism with a separate drive. The finished part is removed through a hole in the rack in which the supports of the forming rolls are mounted. However, in this case, the technological capabilities of the machines are limited both by the lower and the upper limits of the diameters of the parts produced. The first is related to the fact that relatively small diameters of a bending vapka mandrel (up to 40 mm) and a length exceeding the diameter more than 15 times, its free end loses stability due to unequal conditions of contact of the mandrel with the lower and upper forming rolls For example, in the initial forming phase, and spontaneously leaves the forming area, which leads to the production of parts to be rejected. .- - The limitation on the upper limit is explained by the fact that an increase in the diameters of tubular parts is possible by increasing the diameter of the bending roll-mandrel, and this is limited by the design features of the machine. On the other hand, to increase the diameters of the tubular parts impose restrictions on the condition of their removal, i.e. the size of the window through which the finished part is drawn from the shaping zone. In addition, it is not fully possible to realize the advantages of the scheme with two traditional forming rolls. The presence of a special mechanism for the implementation of the force interaction of the bending and forming rolls with ensuring the constancy of the magnitude of their approach and mutual parallelism essentially complicates the design of machines. The need for Jifce to periodically mix the forming rolls, and then diluting them to remove the part, lengthens the cycle of manufacturing the part, i.e. reduces labor productivity. The aim of the invention is to expand the range of diameters of manufactured parts, simplify the design of machines and increase productivity. For this purpose, the bending roll-mandrel has a second support, which, together with the existing one, is painted on the swivel 724. bracket fixed in the frame on the horizontal axis parallel to the rolls, one of the supports is made rotatable in the horizontal plane and each forming roll is provided with a brake clutch, and the frame - by the final switches for switching the coupling, which are located on both rtorons from the swivel arm at distances corresponding to their extreme positions. In FIG. 1 shows the proposed pistol-bending Vapkova machine in cross section; in fig. 2 - section A-A of FIG. one; in fig. 3 is a section along the support arm of the left end of the roll mandrel; in fig. 4 - section bb FIG. 1. The sheet bending roll machine contains a frame 1, made in the form of two racks 2. In the frame 1, sliders 3 are mounted in which the upper forming roll 4 is placed. The sliders 3 are moved in CTatraHe with screws 5 equipped with handwheels 6. In the same racks 2 bed 1 under the forming roller 4 in a common vertical flat-. With these symmetries, the forming roll 7 is placed. The forming rolls 4 and 7 rotate from the electric motor 8 through the gearbox 9 using a stub-roller chain 10. To this end, the rolls 4 and 7 are equipped with asterisks 11. The tension tension tsetm 10 is reached with using the lever-tensioning device 12. On the axis of each of the structural rolls 4 and 7 with similar design, with the possibility of axial movement along the direction of the key 13, a double-sided cam coupling half 14 is mounted. The coupling half 14 can engage the lib with the coupling half,. at the same time with an asterisk 11, which rotates freely on the axis, or with a fixedly fixed coupling half 15, switching is performed using an electromagnetic actuator (not shown), and switching control is performed using limit switches 16 and 17 and from the control panel 18, on the lower part of the frame 1 in the supports 19 a swinging arm 20 is mounted, made in the form of two C-arms, rigidly connected to each other. The bracket 20 is fixed in two stable positions by means of springs 21. The first stable position (upper), determined by the stop 22, corresponds to the working position of the roll mandrel 23 when its axis is located in the common plane of symmetry of the forming rolls 4 and 7, the second stable position of the bracket 20 (lower) corresponds to the arrangement of the roll mandrel 23 during removal finished parts. The left (according to the drawing) end of the roll-mandrel 23 rests on the studs 24 located in the housing 25 mounted on the lever 26. The lever 26 with the possibility of rotation in the vertical plane is mounted in the fork bracket 27 fixedly mounted on the left arm of the bracket 20, The support leg of the roll 23 is made in the form of a ring 28 fixed on the swinging bridge 29 mounted in the fork of the AOR, which can be rotated around a vertical axis. Leaning the support leg: with the help of the handle 31, and fixing it in the extreme positions with the help of the sharshny stopper 32. The extreme lower positions of the levers 26 and 29 in the free state are determined by the stop of the figured notch of the lever 29 into the adjusting bolt 33. , Before starting the work, the machine is adjusted. In the position of the crushing for 21 Eject the finished part with the help of adjusting bolts 33, the roll-mandrel 23 is set parallel to the forming rolls 4 and 7 with this calculation. so that in its working condition (with maximum penetration) between the ends of the bolts 33 and the steps of the figured notches of the levers 26 and 29, there is a gap of 2-3 mm. Then, by turning the handwheel 6, the upper forming roll 4 is lowered to the position corresponding to the required insertion value. roll-frame 23 in the elastic coating of both forming rolls (taking into account the thickness of the sheet blank). After adjustment, the first working cycle of forming the tubular part is performed. After switching on the electric motor 8, the arm 20 with the roller-mandrel 23 is supplied forward. At the same time, the limit switch 16 and the cam half coupling of the lower forming roll 7 are moved to the far left position, and similar to the coupling half 14 of the upper forming roll 4 - to the far right Polo. In this case, the torque from the continuously rotating sprocket 11 is transmitted to the axis of the lower Shige roll 7, and the upper roll form 4 is thus inhibited. The bracket 21 is fed until the roller mandrel 23 contacts the rotary wheel by the lower forming roller 7. Under the action of the springs 21, the roller mandrel 23 is jammed between the forming vadkam, gripped by the forces of friction and further advance of the roller mandrel 23. Roller 23 is rolled on the fixed surface of the upper forming roll 4, deforming the elastic coatings of both forming rolls by the amount due to the provisional position of the upper forming roll 4, advancing the roll of the mandrel to its working position & the gap between the upper 4 and lower 7 forming rolls occurs until the bracket 2 O, Flipped by the roller mandrel and the force of the springs 21, comes into contact with the stop 22, the end switch 17 is triggered, half coupling 14 is converted into the extreme left position, and the twisting moment is transmitted to the axis of the upper forming roll 4, the roll-mandrel, therefore, is placed in the working position, receives due to friction forces only a rotational movement in the direction indicated by the arrow. Then, a sheet blank is inserted into the clinch space between the lower forming roller and the roller. As far as it goes, the sheet blank is inserted into the latter, which is then captured by the moving surface of the rolls and, winding on the roller mandrel, becomes cylindrical. After the shaping process is completed, the command from the control panel 18 half-coupling the lower form roller 7 moves to the extreme right position, the roller decelerates, and the abutment roll with the part rotated by the upper forming roll 4 begins to move, now around the bottom forming roll, and leaves the forming zone. The bracket 21 is transferred to the lower stable position ensuring the exit of the roll-yutzavka beyond the limits of the stand 2 of the station 1, and the handle 31 rotates the bracket 30 with the ring 28 by 90, t, e. release of the right end of the roll-mandrel. Thereafter, the unobstructed removal of the finished part is carried out. By feeding the bracket 20 forward, the next manufacturing cycle of the tubular part begins.

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p1 (em "yay7 On the other side, this / WTO, time, means the possibility of increasing the diameter of the shaft of the mandrel for increasing the diameter of the machine, i.e., expanding the machine technology in terms of DL1N forming tubular parts of tubular parts

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The presence of a special device for forceful shaping of the forming rolls (creating the necessary amount of roll-mandrel insertion into elastic coatings) greatly simplifies and, consequently, increases the reliability of the machine design.

Eliminating the need to periodically mix the forming rolls to form each part and to make them ready for removing finished products. Shortens the manufacturing cycle of tubular parts, i.e. increases productivity The invention of the sheet bending roll machine, comprising a frame, lower and upper drive rolls with an elastic coating and a bending roll mandrel with a support located between the forming rolls, characterized in that in order to expand the range of diameters of the parts manufactured, simplify the design and increase labor productivity, the bending roll mandrel is provided with a second support, which, together with the existing one, is mounted on a swivel bracket fixed in the frame on the main axis, located on parallel to the rolls, one of the supports is made rotatable in a horizontal plane and each forming roll is provided with a brake clutch, and the bed is equipped with end switches for switching the sleeves located on both sides of the swivel bracket at a distance corresponding to its extreme positions. Sources of information

taken into account in the examination

1. US Patent N 3,629,360, cl. B 211) 5/14, 1E71G

2. US Patent No. 3899911,

cl. B 21D 5/14, 1975 (prototype).

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Claims (1)

SUMMARY OF THE INVENTION A sheet bending roll machine comprising a bed, lower and upper drive forming rolls with elastic coating 5 and a bending mandrel roll with a support located between the forming rolls, characterized in that, in order to expand the diameter range of manufactured parts, simplify 10 design and increase labor productivity, the bending roll-mandrel is equipped with a second support, which, together with the existing one, is mounted on a swivel bracket, mounted in a frame on a horizontal axis, a pair In parallel to the rolls, one of the supports is rotatable in the horizontal plane and each forming roll is equipped with a brake clutch, and the bed is equipped with final switches for switching clutches located on both sides of the rotary bracket at a distance corresponding to its extreme positions.