SU1342600A1 - Method of producing laminated articles with knurled surface - Google Patents

Description

11342600

refers to aircraft and

the structure and my; beket should preferably be used for the manufacture of the outer skin of the structural parts of the aircraft.

The purpose of the invention is to increase productivity by intensifying the corrugation process.

Figs. 1-5 show the technological process of manufacturing a plate product with a grooved surface in accordance with the proposed method; Fig. 6 is one possible embodiment of a mandrel;

In the sheet stock, 1, two mutually parallel rows of holes 2 and 3 are preliminarily arranged, the location of which is determined by the calculation station. For this, the sheet stock 1, manually or by means of any known devices (not shown)

. ogre deform around the mandrel 4, align the corresponding holes 2 and 3, after which the bolts 12, passed through the corresponding holes 11 of the clamping bar 10 and aligned versus Q1 versts 2 and 3, are pre-screwed into the holes 13, while between the back surface of the workpiece 1 and the base surface the mandrel 4, a gap is formed, the size of which should be sufficient for insertion of cylindrical rods 8 into the shaped grooves 9; Finally, the gap is eliminated by bolts 12; If necessary, upon completion of the base of the workpiece 1

According to the conditions provided by the mandrel 4, the balancing of the coaxiality of the corresponding mandrel-workpiece – billet, tiy 2 and 3 after deformation of the workpiece is carried out. To corrugate the deformed surface. To deform the preform 1, use the preform bath 1, the mandrel 4, through the mandrel 4, which is equipped with a semi-lead 7, rotates with you 5 to be installed at the centers 6 of the to-25 with this speed, provide a given machine (not shown as well as for the depth of cut and include the longitudinal feed of the cutter 14. In this case, the spiral 3Q grooves 15 are cut out on the cylindrical surface of the deformed workpiece 1, the pitch of which is determined by the feed rate per turn of the workpiece. If the groove profile in one pass is ensured by the known lead of the driver 7,

The base surface of the mandrel 4 is a cylindrical surface, forming a parallel to the semi-axis m - 5, and the guide is an arc of a circle. The radius of the circle is chosen from the conditions for providing elastic deformations of the workpiece 1 when it is based on the mandrel 4, the length of the arc is due to the condition of obtaining a rifle of a given length, and the length of the generatrix is based on the condition of obtaining a specified amount of flute on the product for a given

35

It is impossible for us to carry out multipass cutting. After obtaining a predetermined profile by fluting, the workpiece is removed from the mandrel, the bolts 12 are unscrewed from the holes 13 and removed from the holes 2 and 3, and a section of the workpiece.

the size of the step flute. The mandrel 4, which blends a corrugated surface, returns the original profile, for which purpose both the elastic forces of the material of the blank and the external forces are used.

Moreover, it is provided with a device for the backlash-free base of the workpiece 1 on the mandrel 4, which in all versions must be located inside a circle that outlines the base surface of the mandrel. In particular, this fixture contains cylindrical rods 8, which are placed in the mandrel 4 outside the base surface shaped longitudinal grooves 9, a clamping bar 10 with holes 11 arranged similarly to the arrangement of holes 2 and 3, and bolts 12, under which between the slots 9 in the mandrel 4 are made s threaded holes 13,

The provision of the workpiece 1 on the mandrel 4 is carried out before or after installing the latter in the centers 6 of the turning

45

50

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with a grooved surface, the rifles of which are arranged in parallel, cut out the product of a given size and configuration, while ensuring the required orientation of the grooves relative to the edges of the product.

Example, A plate product with a size of 400x350 mm with parallel grooves of 400 mm length, 0.2 mm depth and 0.2 mm pitch is made. For this, a 16B16T1 turning-screw-cutting machine, a cutter with a natural diamond cutting insert of a triangular profile with an angle of 53 at the apex, a workpiece of the size

machine tool. For this, the sheet stock 1, manually or by means of any known devices (not shown)

ogre deform around the mandrel 4, align the corresponding holes 2 and 3, after which the bolts 12, passed through the corresponding holes 11 of the clamping bar 10 and the combined holes 2 and 3, are pre-screwed into the holes 13, between the back surface of the workpiece 1 and the base surface of the mandrel 4, a gap is formed, the size of which should be sufficient for insertion of cylindrical rods 8 into the shaped grooves 9. Finally, the gap is eliminated by bolts 12, if necessary, upon completion of the base of the workpiece 1

35

It is impossible for us to carry out multipass cutting. After obtaining a predetermined profile by fluting, the workpiece is removed from the mandrel, the bolts 12 are unscrewed from the holes 13 and removed from the holes 2 and 3, and a section of the workpiece.

with a grooved surface, the rifles of which are arranged in parallel, cut out the product of a given size and configuration, while ensuring the required orientation of the grooves relative to the edges of the product.

Example. A plate product with a size of 400x350 mm is made with parallel riffles of 400 mm, a depth of 0.2 mm and a step of 0.2 mm. For this, a 16B16T1 turning-screw-cutting machine, a cutter with a natural diamond cutting insert of a triangular profile with an angle of 53 at the apex, a workpiece of the size

570x360 mm, 0.5 mm TOL1TSINA (blank material duralumin V-95T) and a mandrel made of duralumin V-95T, in the form of a polished round cylinder with a diameter of 182 mm and a length of 3811 mm. The lateral surface of this cylinder, within a range delineated by an arc of 260 ° (which corresponds to an arc length of approximately 410 mm), is a basing surface. Between the cylinder-forming edges of the clamping surface, a recess is made in the mandrel to accommodate a device for the backlash-free base of the workpiece on the mandrel. In a particular example, the configuration of the recess in cross section and its dimensions are depicted in FIG. 2. The mandrel is provided with semi-axes whose axis coincides with the axis of the base surface. In addition, the device for the backlash-free base of the workpiece on the mandrel contains two polished steel (steel, steel 45) cylindrical rods with a diameter of 35 mm and a length of 380 mm; a steel clamping bar (steel, Art. 45) measuring 20x380x5 mm, in which 17 holes with a diameter of 6 mm are made along the longitudinal axis of symmetry through 20 mm; Bolts Mbho, 73 (60 mm in the amount of 17 pieces, under which in the mandrel are threaded holes, the location of which corresponds to the location of the holes in the pressure plate.

The manufacture of a plate product with a grooved surface is carried out as follows.

In a sheet blank, whose dimensions are shown in heat, two parallel rows of holes are drilled, the arrangement of which is shown in FIG. 3. The billet is manually deformed so that the corresponding holes of both rows are aligned. The bolts of the non-backing base, which are previously passed through the corresponding holes of the clamping bar, are inserted into the aligned holes. A mandrel is inserted into the tubular body formed, and the bolts are pre-screwed into the corresponding threaded holes of the mandrel, and then cylindrical rods are inserted into the corresponding grooves between the billet and the mandrel. Subsequently, the final tightening of the bolts is carried out.

what is judged by the elimination of all gaps between the dark surface of the workpiece and the base surface of the mandrel. As a result of this attachment, the section of the blank pressed to the base surface acquires the profile of a cylindrical surface with a circular arc in the form of an arc, and the longitudinal parts of the blank adjacent to this section inside an imaginary continuation of the basing surface.

In the future, the mandrel with the deformed workpiece is installed in the centers of the machine 16B16T1, which is supplied with a driving device. The corrugations are carried out during the rotation of the mandrel with the workpiece at a speed of 480 rpm with a longitudinal feed of the cutter of 0.2 mm / rev and a depth of cut, mm: 0.05 during the first, second and third passes of the cutter; 0.03 - during the fourth pass; 0.02 - during the fifth (last) pass. In the process of cutting chips from the zone. cuttings are removed by a stream of compressed air,

With each turn of the mandrel in the area of the workpiece, which envelops the base surface and has a profile of a cylindrical surface with a circular arc guide, the tool cuts a spiral groove approximately 410 mm long, and does not touch the workpiece outside this area. After the passage of the entire length of the workpiece, the cutter is retracted from the last and returned to its original position without being out of sync with the spindle. Further, the cycle is repeated, but with a greater depth of cut. As a result of five cutter passes, the rifles acquire the specified profile,

To obtain a product of a given configuration and required dimensions, the mandrel is removed from the centers of the machine tool, and the semi-finished product is removed from the mandrel. After dismantling from the mandrel, the blank section returns the original profile to the part of the workpiece on which there is a grooved surface. This operation is carried out both by the elastic forces of the workpiece material and by external forces, in particular, manually. Removal of excess parts of the workpiece is carried out on an EDM machine.

Claims (1)

The invention of the method of manufacturing a plate product with a corrugated surface by corrugating a sheet billet and obtaining a product of a given size and configuration J characterized in that, in order to increase productivity, the billet is deformed to form a cylindrical profile, rifles are formed by relative movement of the tool around the billet along a spiral trajectory. and, before obtaining a product of a given size and configuration, the workpiece or part of it is deformed to give it an initial profile . (  ,ten F.B Compiled by V. Zolotov Editor E. Papp Tehred L. Serdyukova Proofreader N. Sharoshi Order 4551/9 Circulation 974 Subscription VNIIPI USSR State Committee for inventions and discoveries 113033, Moscow, Zh-ZB ,, Raushsk nab ,, d 4/5 Production and printing company, Uzhgorod, Projecto st., 4