SU1611505A1 - Method and apparatus for manufacturing screw conveyer spirals - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular to technology and equipment for bending a strip material by winding onto a rib. The purpose of the invention is to expand the technological capabilities by winding out of workpieces of variable width and allowing the bending force to be controlled. In the process of winding on the mandrel 2 fixed in the actuator 1, form a dense package of turns, the inner diameter of which is associated with the current value of the strip width by a certain dependence. The relationship between these values is given. A wound package of turns is then stretched in a step. Initially, the helix is stretched to a step equal to 0.7–0.8 of the desired value, and then calibrated according to the outer diameter and pitch. A device for carrying out the method comprises an integral shaping roller and a guide roller. The forming roller is made of two concentrically mounted on axis 7 parts 6 and 8. The outer part 8 is spring-loaded with a packet of disc springs. The device includes a bending force adjustment unit. In the process of winding a variable width strip, the non-linear nature of the change in the biasing force from displacement is ensured, which ensures optimal bending forces and stability of the winding of the strips with a large difference in width over the length of the helix. 2 sec. and 4 hp f-ly, 8 ill.

Description

The invention relates to the processing of metals by pressure, in particular to the technology and equipment for flexible. strip material by winding on the edge. ...

The purpose of the invention is the expansion of technological capabilities. Due to the provision of winding from the blanks of the variable pattern and the possibility of adjusting the bending force of FIG. 1, the workpiece is shown with ne. belt 1shirt | in fig. 2 - proce. Shaping a package of tight turns in; the process of winding; Fig 3 is a diagram; to determine the ratio. t between widths; Noah billet spiral and internal: diameter tightly wound coils; PA FIG. .4 - stretched spiral helix; in fig. 5 shows the calibration process with the diameter of the outer diameter and:. step; on. FIG. b - the device PL on: giba | in fig. 7 is a view A of FIG. -BH; Fig, 8 - a spring spring. ; Billet for the manufacture of slugs: worm-like screws are wedge-shaped, diarrhea: which, as a rule, is obtained by cutting the strip on the guillotine shears into trapezoid billets, Lp fine spirals with a given law of change as the outer, and the inner diameter of the billet has the shape of a trapezium with a curved side - Noah, which is produced by cutting on the stamp or cutting along the marking.

The formation of the helix is produced in two stages - winding on the mandrel of a dense package of turns to stretch it to a predetermined step with subsequent calibration

 The winding is carried out on the mandrel 2 fixed in the drive t. For this purpose, in the clamping mechanism 3 the end of the strip 4 is fastened and pressed to form a transfer roller -5 with a variable height of gauge for entering the polish

five

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 .

When the mandrel 2 is rotated in the drive T, the strip 4 is wound onto the working portion of the mandrel 2, forming a dense package of turns. The shape-forming roller 5 was shrouded with the possibility of displacements in the radial and axial alignment of the mandrel on the rails so that the gap between the pressing edge of the roller

M rrrs-pteg t o ...

- - V / i J XX L / JI jj (JJ 1Л f 3

And mandrels-2 are constant and are about 1-2 mm. This can be achieved, for example, by installing a device on a lathe with the movement of a support on a copier or according to a program (on CNC machines).

For the case of making spirals of screws with a constant outer diameter and pitch value, for example for spirals of flexible screws, the helix is made from a trapezoidal cross section, and the profile of the mandrel is designed to simplify the circumferential arc of

The stack package is stretched into a spiral at a predetermined pitch. In order to manufacture precise spirals, stretch the pivot first, up to a pitch equal to and 7–0.8 of the preset value. This stretching is carried out on a wedge device of flexing or with a neo-big difference of minimum and 1-taximal width of the strip by applying a tensile force P to the end of the helix. Then the helix is calibrated in rotating rollers (FIG. 5) covering the helix along the periphery and having a helical groove for approaching the outer edge of the strip. The rollers have a j-shaped conical and calibrating cylindrical parts and as they rotate the spiral moves in the axial direction, with the spiral pitch and the outer diameter of the caliber to the specified "The most optimal number of Rollers is equal to three."

Calibration may also be carried out in two large diameter rollers with

ten

5.161

There are stops that prevent the exit of the helix from the working area. A device for winding a spiral iris into a dense package consists of a drive 1 (Fig. 6), with a stepped mandrel fixed to it, and an end surface of a greater degree which is made in the form of a helical surface with a tag equal to the thickness of the slit. In a larger step of the mandrel an axial groove is made, in which the end of the strip 4 is fixed by means of a bushing acting as a clamping mechanism 3.

The workpiece is clamped to the mandrel by a shaping roller 5 made of a composite, comprising a main inner pressing part 6. mounted on an axis 7 rotatably, and an annular outer part 8 with a working end surface encompassing part b, and installed relative to the latter with axial movement and rotation about the axis 7. The axis 7 of the composite forming roller 5 is located perpendicular to the axis of the mandrel in the housing 9, which is installed with the possibility of radial and longitudinal rotation escheni relative to the mandrel, HA pryuter in the caliper lathe. Part 6 of the roller is mounted on the lia axis using a bearing sleeve 10, and its circumference of the ring part 8 is with the glory of two sleeves 11 and 12, the first of which is pressed into a smaller step of the ring part 9, and covers the other sleeve 12 along slides mounted on the axle 7. In the axial direction, the outer annular part 8 of the shaping roller 5 is spring-loaded with a packet of disc springs 13. The thrust ring 14, pressed into the sleeve 12, and the thrust POD1CHIC 15 provide the twist

the outer annular part 8 relative to the support ring 14 and the axis 7. The node of rotation and the package of Belleville springs

zagryscheni casing 16, mounted on the body: e 9.

 For guiding the strip 4 into the working area, next to the forming roller, there is a directional roller 17, mounted for free rotation on the axis 18, fixed in

the groove of the housing 9. Depending on the thickness of the spiral, the axial distance between the rollers 5 and 17 is regulated by the offset of the installation of the latter along the slot Not shown.

five

0

Bending force adjustment during winding is achieved through a bending force adjustment unit. The knot: the adjustments are mounted on an extension of 5} axis 7 on the other side of the housing 9, having a threaded end with a screw connection to which the adjusting nut 20 is located, between the disk springs 13 by means of a 2U plate. The bending force on the outer ring portion 8 of the shape and shape its roll-a is transmitted from the spring 13 by means of the pushing 12 and the pushrods 23 mounted in the housing J and acting on the anvil. nye ring 14 for prizdepi harak-. spring characteristics In accordance with the required -1 law, a change in the bending force along the peripheral part of the rings is made according to the corresponding C1e radial

Wh-Zoo ..

The device works as follows.

b; 10G, the flat end of the Band 4 is fixed on the mandrel 2 in the mechanism 3 for;: c. After that, do it; the supply of the shaping roller 4 so that its n-rugien annular part 8 abuts against the edge of the strip along the edge, and its inner main part 6 when-: it has the strip towards the end of the large mandrel step. The gap between the main part of the roller and the mandrel 2 should be about 1-2.5 mm, depending on the size of the alcohol. When this preloaded ring part 8 moves away from the mandrel 2 on the width of the strip. The free end of the strip is bent along the cylindrical surface of the roller 6 and inserted into the Eazor formed by this part of the roller and the guide roller 17. Then the rotation drive 1 is turned on (cartridge of the cup), resulting in a strip under the influence of the working end surface of the nargan ring-shaped part 8 of the mold roller 5. with a preloaded spring 13 with a weighting sufficient for bending, is wound on a small step of the mandrel 2 o

At the same time, the longitudinal feed of the caliper, which is determined by the averaged TOL1T1LKO spiral along the inner edge, and the transverse gear, correspond to the profile of the mandrel and set by the copier 1SH with a program on CNC machines.

To obtain a spiral with given parameters, first of all, it is necessary

thirty

35

40

45

50

55

to determine the change in the current width of the spiral along the length of the L-billet, which, depending on the pitch T, the outer D and the inner diameter. determined by dependency

  I j 4t

where is dq. - the diameter of the neutral layer of the extended helix Dj D -ViB (/ f is the correction factor .., Г 1.1-1 2 (f is the angular parameter of the spiral- (helicoid) equation).

The diameter of the mandrel corresponding to the internal diameter of a dense package of turns is related to the current width of the strip

d --HLi, Qj oiL-T / d)

4 (+ T2) / (irV + T2 G7

AT

T P

.L f L,

d

-the width of the strip at the current length;

- a step, external and internal diameters of a spiral on a site of a strip width B.

four

1 - 0.25 (d ,, .- d

 B and B are respectively minimal (initial) -and maxi-. gallo (finite), width; bandwidth

K is a correction factor depending on the pitch of the helix and strip thickness. K 0.66-0.75, the diameter of the beginning and end

. X. - KV) + T2j-1. R. D 100 mm, T-pitch 80 mm, the width of the band varies from 10 to 40 mm. The length of the helix is equal to 1 - YOOOO mm, -Talgal on the workpiece H 3mm „

0,

The length of the workpiece is determined by the following: dependence, taking into account the fact that tf 2 PS / T 25P, L, 3000 m /

of the working section of the lower stripe width of the strip with the coefficients of the section with the holder of the length of the mandrel and its diameter

- An example. It is required to make a ° ° given a spiral with then nn outer outer diamet- in the form of tabs

mm

mm

L-I.f.Lfi Lf i ° 7 T °, a r f Gz;

-:: -: ..; "40:73 ll;

.1611505

With specific parameters, the current length of the mandrel 1 is related to the current current band L by the dependence

1 f iUUbJ)

2 | G В В

-dL,

to

where HQ is the thickness of the workpiece; fp is the irregularity coefficient of stretching.

When winding spirals of wedge-shaped strips with straight edges of length C, initial width B., and final Bg, the dependence is converted to the form LO f (j; .- 1) |

one

2t (B,

dB;

20

25

B, BW

When winding spirals with constant n-libiMH parameters D and T, the generators of the mandrel can be approximated with that arc of a circle of radius R, the definition is 1.1 m depending on:

R

0

  -0.25 (do, -d ,,). 43 / (8e),

where 1 is the length of the working part of the mandrel; C is the maximal deflection of the arc forming, which is determined by the dependence:

. X. - KV) + T2j-1. R. D 100 mm, T-pitch 80 mm, the width of the band varies from 10 to 40 mm. The length of the helix is equal to 1 - YOOOO mm, -Talgal on the workpiece H 3mm „

:, Therefore, in the working section of the mandrel with a length of 1 42.57 w, the diameter of the mandrel varies from d. 85.45 mm yo d, 02. 33.5 mm.

55

In accordance with the given dependencies and the curve of the generator of the mandrel, the approximate number is fused. arc circumference with a pad of R 119 mm.

1611503

After avivkk spiral unbend on the wedge mechanism of unbending to the step T 55-65 mm with further calibration in a roller gauge to a step of 80 mm and outer diameter D 100 mg.

In accordance with the proposed method, the height of the device gauge, which is formed by the surfaces of the mandrel 2 and the surfaces of the inner pressing part 6 and the movable outer annular part 8 of the forming roller 5jH3MeHneTCH, is from 10 mm to 40 mm. CRB is the initial data for the calculation of disc springs should be the magnitude of the bending forces of the strip, respectively, for values; compression springs, § 10 t-fi-i and 5 40 mm. For initial section width

ten

15

B - 10 mg take the force of the radar strap P 700 P, for the final one the gastka of width B ,, 40 mm the force P must be P, 3500-4000 And, -

20

thirty

35

Where

a p osu back spin n step

Diameter forming roll

.pika take Dp 150-200m.

Claims (1)

Formula 1 o A method of making sg / helix augers by tightly winding a strip blank on an edge, a mandrel, and then extending to a target step, about one and the same. so that, in order to expand technological capabilities by providing winding from blanks with varying width, a package of turns is formed in the dense winding process, the internal diameter d of which is associated with the current value of the width of the blank relation; to yer curve R Where , , og- - 0.021Х / (Р - КБ / -: square o, 25 (d ,, - d where b and b 02) -J (1f2D (G2 (B 45 KB, KV - respectively, the minimum and maximum width of the workpiece; К - correction factor equal to 0.66-0.7, Зо Device for making screws augers, containing a mandrel with an annular protrusion and a driving drive 5 a device for igniting idle strip on the mandrel, a guide roller for the strip mounted on placed in the housing is perpendicular to the axis of the reference, the shaping roller with an annular the protrusion and the working drive of the moving roller into the fry and the parallel 50 kk, I distinguish that, for the purpose of expansive possibilities, the osteyushchy roller is supplied with a control unit 55 effort and completed, two installed but relatively single I internally with the possibility of rotation ten five  ten d -HL - - --------  g t2) / () - { where B is the current value of the width of the preparation; T, d, and d- pitch, respectively, outer and inner diameters. spirals on the section with width B, and stretching the package beforehand is one of the Blueblocks. to a hag of 0.7-0.8 of a given pitch, after which the helix spiral is spiral along the pitch and along the outer diameter in the process of its main displaced to the end of the specified pitch about P ,-- about lei Method UO p. 1j about tl and h a- to y and with the fact that, in order to ensure the possibility of obtaining a spiral with a predetermined step and outer diameter from a wedge-shaped billet, the filling on the side of the billet , 11th width: / th width, and the radius R krivpzt forming oph.-avki choose equal; R lL ±.) 45. where 1 is the length of the working part of the mandrel; R, Hd, respectively, the diameter of the cap and the end of the working section of the mandrel; , C - the maximum deflection of the arc forming, equal to: go} B / -: apt KB, KV). T - 1}} protrusion and with the working end, as well as the drive for the movement of the shape-. a roller in a direction perpendicular to the belt and parallel to the axis of the frame 50 kk, characterized in that, in order to expand the technological possibilities of the structure, the forming roller is equipped with a pressing mechanism with a bending unit 55 force and made composite in the form of two mounted on the axis concentrically relative to one another parts, I of which is internally mounted with the possibility of rotation, and outer. : n, 16 having an end face,: spring-loaded with respect to inner I and mounted for rotation and axial movement A, The device according to claim 3, of which is 14. It is ensured that the adjustment unit of the bending force is made in the form of a nut, which forms a screw pair, pushers, with the end axis of the shaping roller, installed in an IB casing bearing the shape-forming roller axis, with the possibility of the interaction d of the pressing mechanism and the outer part, the shape of the skinny roller i, and the washer mounted on 1505; the ends of the pushers facing the pressing mechanism, 5. The device according to claim 3, that is, that the pressing mechanism is made in one more than a forming roller placed on the axis between the nut and the washer of the package of disc springs with radial slots along the peripheral part, 6. The device according to claim 3, which is in that the end surface of the outer part of the forming roller, except for the inner 5 edges, made tapered with a given value of the angle of inclination of the generatrix FIG. one Figg OJ,., 0.8T Fig.Z Phie. § I Compiled by V. Shabrova Editor M. Blanan Tehred L. Oliyyyk Proofreader S. Shevkun Order 3791 Circulation 602 VNSH-SHI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab., And. 4/5 Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101 Busa Fy Subscription