SU986541A1 - Machine for folding and cutting-off tube helix ends - Google Patents

Description

(54) MACHINE FOR BENDING AND CUTTING THE END OF A TUBULAR SPIRAL

one

The invention relates to the processing of metals by pressure, in particular, to devices for the manufacture of pipe coils, which are used in nuclear engineering and boiler building.

A known machine for folding and cutting the legs of pipe spirals, comprising a frame with a bending mechanism placed on it, on the support table of which a cross bar is installed with bending rolls, Q and a centralizer with the possibility of radial movement along the groove and cut mechanisms made in the form of a cutting head located on the caliper l., 5

The disadvantage of this machine is that it can be folded and cut. only the symmetrical ends of the spirals, having a bending angle of not more than 90, 2o as the flexible pipe is carried out along the clamp straightly moving by the bending roller, moreover, since the cutting circle is located above the plane

helixes, in the process of bending with a long cut straight part of the end of the helix, the latter, by means of the allowance, rests into the casing of the cutting wheel, and the size of the straight part of the cut end of the helix is not adjustable, which makes it impossible to handle helixes with different lengths of the straight part end of the helix after bending.

The closest in technical cyui of the achieved result is the machine for bending and segments of the ends of two-branch flat spirals, containing an opsphalic plate placed on the machine with rotary centralizers, the mechanisms of bending each end of the helix are made in the form of a rotary frame, carrying a drive shaft with a bending roller a smooth mandrel freely mounted on the same shaft, mounted with the possibility of vertical and angular displacement with ({xapi in the bending zone on the rotary shaft of the table, the frame of which moves during adjustments along the direction of the frame and the cut-off mechanisms are provided with a mandrel with a clip, while their calipers are mounted on the axis of the bending shaft so that they can be rotated around it and fixation (2 The disadvantage of the known machine is that: since only one end of the helix first enters the working parts of the bend mechanism, then, after it is processed by turning the centralizers, the helix is rotated and etc. 1k; processing goes. The other end of the helix in the second bend mechanism decreases the machine productivity by 2 times; when winding a batch of the same type of spirals, the arrangement of their ends has a deviation from the nominal one, and the ends of the spirals in the initial position are outside of the bending elements mounted on the rotary frame, therefore, in the process of processing the helix it is possible to miss the kn. tsa in the bending elements, which leads to a malfunction of the process or reject, besides the presence of a pivoting frame complicates the design; a smooth cylindrical mandrel, rigidly installed casing and shaft of the cutting wheel limit the bend radius, wall thickness of the pipe being bent and it is not possible to process the helix with different straight coriiyToro end of the helix. The aim of the invention is to increase productivity and expand the range of sizes of processable spirals. To this end, in the machine for folding and sections of the ends of the pipe coils containing a base plate placed on the frame with centralizers for mounting the coils, mechanisms of the flexible ends of the coil containing each template and mounted on the drive shaft with a bearing roller rotatable about the template axis, and two cutting heads with casings, placed on shafts on calipers, the frame is equipped with two frames. Each of which is made with two placed between the upper and lower. base transverse beams, the drive shaft of the bending mechanism is mounted on the lower transverse beam, the template is completed in the form of two semi-patterns mounted one under the other and their connecting spacers, the lower semi-template is equipped with a rotating plate mounted coaxially With the drive shaft on the upper transverse beam, and the upper - mounted on the upper base of the frame with a slide and a tangential clamp connected with it, while the bearing of the drive shaft of the mechanism of the bending is equipped with a bracket and a hinged frame pivotally connected with it , and the caliper with a cutting head is installed on this frame so that it can be rotated relative to the vertical axis of the bending template. Each cutting mechanism is equipped with a hollow shaft and a screw pair, and the shaft of the cutting head is installed in this shaft with the possibility of interaction with the screw pair. Each casing of the cutting head is mounted for movement relative to the pivoting frame and is provided with rigidly mounted and spring-loaded stops with clamping mechanisms. FIG. 1 shows a machine, a general view; in fig. 2 - the same, top view; in fig. 3 shows section A-A in FIG. one; in fig. 4B-B in FIG. one; in fig. 5 shows a section B-B in FIG. 3; in fig. 6 - section G-Y in FIG. one; in fig. 7 is a section d-d in fig. 6; in fig. 8 is a view E of FIG. 2; in fig. 9 shows a section of an Ж-Ж in FIG. 1, setting up the machine on a single-plane spiral; in fig. 10 - the same, adjustment of the machine on a two-light spiral; in fig. 11 is a section through AND-FIG. ten; in fig. 12 is a section C-C in FIG. 3. The machine contains a frame 1 with a direction & lushes 2, on which bending mechanisms 4 being moved by drives 3 are installed, which carry cutting-off mechanisms 5 on themselves. At the same time, support plate 6 is placed on frame 1 (see Fig. 1). The bending mechanism 4 is placed on the frame 7 with two transverse beams. In bearings 8 and 9, a drive shaft 10 is installed with a lever 11 carrying a bending roller 12. The working hydraulic cylinder 13 and the return hydraulic cylinder 14 are also mounted on the frame, connected by a chain 15 with an asterisk 16 of the drive shaft 10. A gear wheel 17 is installed on the drive shaft 10 interlocking. with rail 18, bearing petals 19, interacting with contactless sensors 2O, 21, mounted on carriages 22, moved by screws 23 fixed to bracket 7. Rotary plate 25 with stop 26 and stop bolt 27 is fixed on middle bracket 24 of bracket lower removable semi-pattern 29.

On the upper base of the bracket 30 of the frame 7, a tangential clamp 31 is installed with a hydraulic rod 32 and a slider 33, on the end of which there is an upper interchangeable pad 34. A petal 35 is mounted on the slider, interacting with the contactless sensor 36 and 37.

A spacer 38 is fastened on the upper or lower side of the template. The cutting mechanism 5 by the swivel bracket 39 is mounted on the bearing 8 of the drive shaft 1O and on the axis 28 of the bending mechanism 4, which can be rotated and fixed with a straight clip 4O. On the hinged bracket 39, the frame 42 is pivotally mounted using a hydraulic cylinder 41, on rails .43 of which the caliper 45 is mounted so that the hydraulic cylinder 44 can move, adjusting the initial position with a screw 46, and on the lateral surface of the casing 47 of the cutting wheel 48 mixed along the protrusion 49 during adjustment and bearing gkdrotsilindr 5O clamping the end of the helix with a spring-loaded 51 and stationary stops 52.

Shaft 53 from carved wheel 48 with keys 54 is placed on slide 45, moved by screw 55 in hollow shaft 56, having key grooves mounted in bearings 57 and driven by electric motor 58 through a belt drive 59. A spring-loaded clamp 60 is mounted on the bearing housing 57 shaft locking when installing from a carved circle.

The support plate 6 has a body 61, rigidly connected to the bed 1, on the guides of which there is a support 63 moved by a screw 62 carrying a swivel mandrel 64 with interchangeable

centralizers 65, fixed by machine bolts 66 and hydraulic pad moved 67 in its bushings (see Fig. 1, 2).

A hydroelectric station 68 is installed with the machine to ensure the operation of the hydrocylin / ditch and dust collecting units 69 and 70 connected by sleeves to the covers 47 cutting wheels 48.

The machine works as follows.

Before starting work, the machine is adjusted for a specific type and size of the helix, for which by turning on the drives 3, the bending mechanisms 4, the carrying cut-off mechanisms 5 are set to the working position. The screws 23 establish the mutual position of the petals 19 and the proximity sensors 21

 and 22, corresponding to the beginning and end of the bend. On axes 28 and sliders 33, interchangeable semi-patterns 29, 34 and spacers 38 are set for a given radius of bending for one-plane spirals 71 — both at the top, for two-blond spirals 72 — one at the top, and the other at the bottom (see, Fig. 9 and 1O). ). By turning the cut-off mechanisms around the bearing 8 and the axis 28 of the bending mechanism and using their tangential clamp 4O, an angle of cut is established for these mechanisms. Turning the screws 46, 55 sets the stroke of the cutting wheel 48 and its position dp of this length of the straight section of the cut end of the helix, and moving the casing 47 E to the ledge 49 of the hydraulic cylinder 50 of the helix end clamp with spring-loaded 51 and stationary stops 52 and fixing it with bolts set it position corresponding to the required bend radius.

The rotation of the screw 62 and the rotary sleeve 64 with centralizers 65 and corresponding fixtures for this spiral placed on it and the machine bolts 66 fixing it fixes the working position of these centralizers 65.

The hemming and cutting of the ends of the spirals is carried out in the following manner.

Claims (2)

The hydraulic station 68 is turned on and on the plate 67 with the centralizers 65, the helix is placed in the stops 26 and on the lower semi-patterns 29 and the prospect 39. The hydraulic cylinders 26 of the stops fix the ends of the spiral and tangential clips 31 with hydraulic cylinders 32 close the half-patterns 29, 34 with spacers 39 mounted on the sliders 33 and axes 29. The ends of the spiral lie between the closed half-patterns 29 and 34 and the bending rollers 12. Then the working hydraulic cylinders 13 and the hydraulic cylinders return 14 through chain 15 connected with sprockets 16, turn drive shafts 1O with levers 11 and bending rollers 12. Gears 17 of halls 10 are moved into gear racks 18 with lobe 19 until they interact with contactless sensor Ams 20, which turn on the hydraulic cylinders 14 and 16 on the return stroke. Contactless sensor 21 in the reverse course of the lever 11 interacts with the petal 19, turns off hydraulic cylinders 13 and 14 and stops the bending rollers 12 in the initial position. Then the tangential clamp 31 upper semi-patterns 24 with sliders 33 are retracted upward, lift hydraulic frames 41 with swiveling frames 42 with calipers 45, with unsupported cutting slots 48, and with covers 47 with spiral ends of the helix 50 of the helix end 50 and with spring-loaded 51 stops. At the same time, if the end of the spiral is in the lower stream of the semi-pattern 29, then when touched with the pipe under the spring stop 51, the latter is retracted and the bent straight portion of the end of the spiral is fixed to the stationary stop 52 and fixed by the hydraulic cylinder of the clamp 5O, if the end of the spiral is in the upper stream spacers 39, the end of the helix is laid on the upper surface of the spring-loaded stop 51 and is also fixed by the hydraulic cylinder of the clamp 50. Then, by turning on the hydraulic cylinder 44, the cutting wheel 48 is moved with the caliper 45c specified by torus of oil flow rate to the cutting zone. After cutting by hydraulic cylinder 44, cut-off wheels are removed from the cutting zone and by turning on hydraulic cylinder 41, the rotary plate 42 with the caliper 45 and the casing 47 is lowered, the hydraulic cylinder of the clamp 5O releases the cut end of the helix, the moved spring-loaded stop 51 returns to its original position and the cylinders of the stops 25 release helix ends. The helix is then removed. To remove the helix, the hydraulic cylinder is turned on, which lifts the plate 67 with the helix, removes it from the centralizers 65 of the lower half-patterns 29 and the stops 26. Then the helix is removed and the plate 67 is lowered to the initial position to process the next helix. The automatic cycle of work is carried out due to the contactless sensors installed at the beginning and end of the movement of the mechanisms of the machine. The use of the invention provides by making bending templates with profile and detachable ones, with the possibility of their closing and fixing with a tangential clamp through a profile spacer installed on one of the half pins, and with a hingedly mounted rotatable frame bearing a support with a cutting wheel, the shaft of which is made telescopic and available move in the process of adjustment to the center of the bend and bearing on a spring-loaded and stationary stops, to ensure the processing of spirals with smaller bend radii and pipe wall thickness. different lengths of the straight section of the bent end of the helix, as well as their single-plane, double-layered, which allows reducing the range of equipment used in the processing of spirals and freeing 50 O m of production area. Placement, bending elements-pattern. The bending roller, the stop is stationary under the plane of the helix in the bend area, through a complex bracket bearing bend mechanisms and sections, allows you to pre-install the ends of the helix into the bending elements and fix them with the stops, and this will secure the reliability of the helix process. Replacing the rotation of the centralizers by their movement during the adjustment process along the table body guides allows both conch helixes to be simultaneously introduced into the bend zone and processed, which reduces the processing time of single-plane spirals by 1.8 times. Claim 1. The machine for bending and sections of the ends of the tube coils containing a support plate placed on the frame with centralizers for mounting the coils, bending mechanisms of the ends of the coils containing each template and a bending roller mounted on the drive shaft with bearing, rotatable relative to the template axis, and two cut-off heads with shells placed on shafts on calipers, characterized in that, in order to increase productivity and expand the range of sizes of the spirals being processed, the frame is equipped with two frames, each of which is made with two transverse beams placed between the upper and lower bases, the drive shaft of the bending mechanism is mounted on the lower transverse beam, the template is made in the form of two semi-templates mounted one below the other and a connecting spacer, the lower semi-template is equipped with a rotating plate, mounted coaxially with the drive shaft on the upper transverse beam, and the top mounted on the upper base of the frame with a slide and a tangential clamp connected with it, with the drive shaft bearing m The bending mechanism is provided with a bracket and a hinged frame pivotally associated with it, and a support with a cutting head is mounted on this frame with the possibility of turning it relative to the vertical axis of the flexible template. 2. The machine tool according to claim 1, characterized in that the cutting mechanism is provided with a hollow shaft and a screw pair, and the shaft of the cutting head is installed in this shaft with the possibility of interaction with the screw pair. 3. The machine according to PP, 1 and 2, characterized in that each co-bow cutting head is mounted for movement relative to 4110 of the door frame and is equipped with rigidly mounted and spring-loaded stops with clamping mechanisms. Sources of information taken into account in the examination 1. USSR author's certificate number 326012. Cl. B 211) 7 / O2, 1967. 2.Certificate of the USSR Nfe 795573, cl. 7/02, 03/04/78 (prototype). 3 Fig4 BB FIG. five 7 gd 55 ""at GB gd 29 fi