RU2303501C2 - Method for making parts with zigzag corrugated structure - Google Patents

Abstract

FIELD: plastic working of metals, possibly manufacture of corrugated constructions with wrinkled structure from thin-sheet material.

SUBSTANCE: method comprises steps of feeding continuous blank in the form of linear corrugation to shaping zone; jamming blank for forming in it two jammed zones in the form of mutually spaced saw-tooth lines or saw-tooth belts consisting of rectangular faces; forming on blank zigzag and saw-tooth lines according to marking out lines on development of zigzag corrugated structure. In order to realize it, between jammed zones part portion with zigzag corrugated structure in the form of two-row or three-row belt is formed. Said two-row belt includes two belts with faces in the form of parallelogram. Three-row belt includes two belts with faces in the form of parallelogram and arranged between them mean belt with rectangular faces. At jamming, mean belt of three-row belt is shaped in such a way that to provide its profile similar to that of saw-tooth belts but shifted in cross direction. Shifting value is equal to amplitude of zigzag lines of corrugated structure. All operations are cyclically repeated.

EFFECT: enlarged manufacturing possibilities of method.

2 cl, 5 dwg

Description

The invention relates to the technology of manufacturing corrugated structures with a folded structure from sheet materials, for example, metal, paper, cardboard, polymer paper or similar materials. It can be used in the manufacture of lightweight aggregate for multilayer panels, filter elements, packaging material and other structures with a relief surface in the form of a zigzag corrugation.

A known method of manufacturing a filler with a structure such as a zigzag corrugation, which consists in laying a sheet of a reinforcing fabric impregnated with a binder on a transformable forming mandrel, sealing with a vacuum bag, putting the mandrel in a raised state and forming the product under atmospheric pressure (RF Patent No. 1706148, MKI B32 B 15/00, В29С 59/00. Device for the manufacture of products of complex profile from composite material. V.I. Khaliulin, V.E. Desyatov. Published Bulletin No. 16 of June 12, 1996) - [1].

The disadvantage of this method is that it allows the molding of products only from composite materials.

A known method of manufacturing a filler of a folded structure such as a zigzag corrugation from composite material, including laying a flat sheet of fabric, weakening the stiffness of the workpiece by applying a binder to the fabric discretely in areas forming the side faces of the filler, to obtain strips of impregnated fabric along the connection lines of the side faces, curing the binder and deformation of the workpiece according to the profile of the cells (RF Patent No. 2057647, MKI B29D 9/00. A method of manufacturing a filler from composite material. V.I.X liulin, V.E.Desyatov Publ Bulletin №10 of 10.04.1996) - The.... [2]

The disadvantage of this method is its limited technological capabilities, since it is applicable only to the manufacture of aggregate from composite materials.

A known method of manufacturing a zigzag corrugation, implemented in a device protected by RF patent No. 2118217, MKI B21D 13/00. Device for corrugating sheet material. V.I. Khaliulin, I.V.Dvoeglazov. Publ. bull. No. 24 dated 08.27.1998 - [3]. The method consists in the fact that the sheet preform is installed in the forming unit in the form of two transformable matrices forming an airtight cavity, and the product is formed by bending the workpiece along zigzag and sawtooth lines simultaneously over its entire surface when creating a vacuum in the airtight cavity.

The disadvantage of this method is its limited technological capabilities, since the method cannot be implemented for the continuous production of zigzag corrugation from tape.

A known method of manufacturing a zigzag corrugation, adopted as a prototype and protected by RF patent No. 2100120, MKI B21D 13/00. A method of manufacturing a zigzag corrugation (options) and a device for its implementation. V.I. Khaliulin, E.A. Skripkin. Publ. bull. No 36 of 12/27/1997

The method consists in the fact that a blank in the form of a corrugation with a linear generatrix is fed into the forming zone, the blank is jammed in two parallel and spaced apart jammed zones, zigzag and sawtooth lines are formed on the blank according to the shape of the cells of the zigzag structure by inverting the corrugation to the opposite to form the desired relief.

The disadvantage of this method is the low accuracy of manufacturing a zigzag corrugation with predetermined parameters and limitations in the implementation of this method according to the properties of the formed materials due to the fact that in the forming zone the workpiece material undergoes large deplanations (exit of faces from a flat state with significant wave formation), which leads to low surface quality of the faces or even violation of the integrity of the material.

The technical result to which the claimed invention is directed is to expand the technological capabilities of manufacturing parts with a zigzag corrugated structure from sheet materials with high elastic properties.

The technical result is achieved by the fact that in the method of manufacturing parts with a zigzag corrugated structure, comprising supplying a continuous workpiece in the form of a linear corrugation to the shaping zone, jamming the workpiece in two parallel spaced apart zones spaced from each other, transverse to the workpiece feed direction, forming preparation of zigzag and sawtooth lines in accordance with the marking lines on the reamer of a part with a zigzag corrugated structure and cyclic The repetition of all operations, it is new that the workpiece is jammed with the formation of jammed zones in the form of two spaced sawtooth lines or sawtooth ribbons consisting of rectangular faces, the formation of zigzag and sawtooth lines on the workpiece is carried out by shaping between the jammed zones of the part zigzag corrugated structure in the form of a two-row tape, including two ribbons with faces in the form of a parallelogram, or a three-row tape, including two ribbons with gran in the form of a parallelogram and a middle tape made of rectangular faces located between these tapes, while jamming the workpiece with the formation of sawtooth tapes, the middle tape of a three-row tape, shaped between said sawtooth tapes, is formed with a profile similar to the profile of sawtooth tapes, but shifted in the transverse direction by the magnitude of the amplitude of the zigzag lines of the structure.

After shaping between the pinched part of the part with a zigzag corrugated structure in the form of a three-row or two-row tape, the pinched zones are brought together until the faces are closed in the form of a parallelogram.

The invention is illustrated in figure 1-5, which shows:

Figure 1, a-1, and - types of the obtained parts with a zigzag corrugated structure in a raised state, in a compressed state and their development;

Figure 2, a-2, e is a diagram of the phased shaping of parts with a zigzag corrugated structure with the formation in the jammed zones of sawtooth ribbons of rectangular faces;

Figure 3, a-3, d is a diagram of the phased shaping of parts with a zigzag corrugated structure with the formation of sawtooth lines in the pinched zones;

Figure 4, a-4, d is a diagram of the phased shaping of parts with a zigzag corrugated structure with the formation between the pinched zones of a double-row tape of a zigzag corrugation;

5, a-5, b - stretching a tightly compressed part with a zigzag corrugated structure to a nominal block size.

A part with a zigzag corrugated structure (Fig. 1, a) is characterized by zigzag lines of the peaks 7, zigzag lines of the depressions 2, basic sawtooth lines 3, 4, middle sawtooth lines 5, 6, parallelogram faces 7, basic rectangular faces 8, middle rectangular faces 9 Between the base sawtooth lines 3, 4 and the median sawtooth lines 5, 6 are the base and median sawtooth ribbons, respectively, joined by ribbons from parallelogram faces 7. Detail with a zigzag hydrochloric corrugated structure with a complete set of structural elements, i.e. base and median sawtooth strips width 2P and T, respectively, combined ribbons of parallelogram faces is called Z-P-T-corrugation that has a fold structure that is deployed on a plane without tearing and overlay material.

Figure 1, b shows the scan ZPT-corrugation. The characteristic lines of this structure on the scan are indicated by the same numbers as in figure 1, a. Position 10 marks the lines passing in the middle of the base ribbons of width 2P ₀ . The marking of the ZPT corrugation on the scan is set by the parameters S ₀ , 2L ₀ , V ₀ , 2P ₀ , T ₀ (Fig. 1, b), where S ₀ is the step between the marking lines of the base tapes; 2L ₀ is the double step between the zigzag lines of the peaks or troughs, respectively; V ₀ - the amplitude of the zigzag lines on the markup; 2P ₀ - the width of the base sawtooth ribbons; T ₀ - the width of the median sawtooth ribbons.

Figure 1, in the depicted ZPT-corrugation in a compressed state, characterized by the vertical position of the parallelogram faces 7 and wedge-shaped cells along the base and middle sawtooth ribbons. The corresponding structure parameters of the ZPT corrugation in the raised state are indicated by S, 2L, V, 2P, T (Fig. 1, c), where S is the step between the lines of the base ribbons; 2L is the double step between the zigzag lines of the peaks or troughs, respectively; V is the amplitude of the zigzag lines on the ZPT corrugation in a raised state; 2P - the width of the base sawtooth ribbons; T is the width of the median sawtooth ribbons. Moreover, P = P ₀ , T = T ₀ .

Part with a zigzag corrugated structure shown in figure 1, g, we call Z-T-corrugation. Part with a zigzag corrugated structure shown in figure 1, g, will be called Z-corrugation. These details are a special case of the above Z-P-T-corrugation. In the Z-T-corrugation (figure 1, g) the width of the base sawtooth ribbons 2P is taken equal to zero. As a result, two basic sawtooth lines 3 and 4 merge into one line 3-4.

In the Z-corrugation (Fig. 1, g) both for the base sawtooth ribbons and for the middle sawtooth ribbons, the widths of 2P and T are taken equal to zero. As a result, lines 3 and 4, as well as 5 and 6 merge in pairs into two sawtooth lines.

Figure 1, e and figure 1, h shows, respectively, the scan Z-T-corrugation and Z-corrugation, and figure 1, e and 1, and they are shown in a tightly compressed state. For the Z-T-corrugation, this is a construction with cells along the middle sawtooth ribbons. For the Z-corrugation, this is a continuous package without cells. All designations on these structures correspond to the Z-P-T-corrugation. Z-T-corrugation and Z-corrugation are also folded, i.e. unfolding on a plane.

Figure 2, a-2, e shows a diagram of the formation of Z-P-T-corrugation of corrugated workpieces in a cycle.

Figure 2, a - the first operation of shaping - jamming of the workpiece. The initial preform 11 is in the form of a linear corrugation (Z-corrugation), i.e. corrugation with a linear generatrix. The shape of the guide L-corrugation can be arbitrary, but preferably with rounded ridges or sinusoidal. The forming zone is located between two parallel sections AA and C'-C '. The workpiece is pinched by two basic sawtooth tapes formed by rectangular elements 8 with a width P, located between sections A-A and A'-A 'and, respectively, CC and C'-C'. Sawtooth bands are limited by sawtooth lines 3, 10 and 4, 10, respectively. In the middle, between the pinched zones, the workpiece retains the original profile, smoothly turning into a sawtooth along lines 3 and 4 in the pinched zones. F is the width of the forming zone and, accordingly, the pitch of the workpiece in each cycle.

Figure 2, b - the second operation of forming - the formation of a three-row tape Z-P-T-corrugation. A three-row ribbon contains two ribbons of parallelogram faces 7 and a middle sawtooth ribbon between rectangular faces 9 having a width T located between them. The middle sawtooth ribbon is bounded by sawtooth lines 5 and 6, which lie in sections B-B and B'-B '. These sections are parallel to sections AA and CC. The middle sawtooth band has the same profile as the basic sawtooth band in pinched areas. At the same time, these tapes are shifted relative to each other in the transverse direction by the magnitude V of the amplitude of the Z-P-T-corrugation.

и

- соответственно, положение этих точек после формирования трехрядной ленты Z-P-T-гофра, V - амплитуда Z-P-T-гофра.Figure 2, shows the trajectory of the movement of points on the workpiece during the formation of a three-row tape in section DD, located between the planes bb and b'-b 'and parallel to them. 3 - sawtooth lines in the clamped section of the workpiece A'-A ', 6 - position of the sawtooth line in the DD section after the formation of the three-row ZPT-corrugation tape, 12 - profile of the workpiece in the DD section before the formation of the three-row tape. P _B and P _H - the initial position of the upper and lower points on the workpiece, respectively, in which the nodes of the part are formed, i.e. the intersection of zigzag and sawtooth lines.

and

- accordingly, the position of these points after the formation of a three-row tape ZPT-corrugation, V is the amplitude of the ZPT-corrugation.

Figure 2, g - the third operation of shaping - squeezing a three-row tape Z-P-T-corrugation to the position of the parallelogram faces 7, close to vertical. Characteristic of this operation is the pairwise convergence of the planes A'-A 'and B-B, as well as B'-B' and CC, before they merge. The compressed three-row tape is characterized by a vertical arrangement of parallelogram faces 7.

Figure 2, d - the operation of forming a three-row tape Z-P-T-corrugation in the next cycle after feeding the workpiece to step F.

Figure 2, e is an arbitrary stage of forming Z-P-T-corrugation.

Figure 3, a-3, e presents the steps of forming a Z-T-corrugation.

Figure 3, a - the first operation of forming Z-T-corrugation - jamming of the workpiece. The jammed zones have a width close to zero and are sawtooth lines lying in sections AA and CC.

Figure 3, b - the second operation of forming a three-row tape Z-T-corrugation.

Figure 3, c - the third operation of squeezing a three-row tape to a cellular structure, characterized by a complete convergence of sections A-A and B-B, as well as B'-B 'and C-C.

Figure 3, g - the operation of forming a three-row tape Z-T-corrugation in the next cycle after feeding the workpiece to step F.

Figure 3, d is an arbitrary stage of forming Z-T-corrugation.

Figure 4, a-4, e shows the steps of forming Z-corrugation.

Figure 4, a - the first operation of pinching the workpiece in two sections aa and cc with the formation of sawtooth lines 3 and 4 in these sections. In the interval between these sections, the workpiece retains a sinusoidal profile.

Figure 4, b - the second operation of forming a double-row tape Z-corrugation with the formation of a sawtooth line 5-6, located in section BB.

Figure 4, c - the third operation of squeezing a double-row tape Z-corrugation to the contact of parallelogram faces 7. This operation is characterized by the convergence of sections AA and CC.

Figure 4, g - the formation of double-row tape Z-corrugation in the next cycle.

Figure 4, d is an arbitrary stage of forming Z-corrugation.

Figure 5a shows the Z-corrugation in a state of tightly closed parallelogram faces of the ribbons of the zigzag corrugation with a clear design of the ribs along the zigzag and sawtooth lines, and figure 5, b shows the Z-corrugation after stretching the package to the nominal size.

The basis of the proposed method are the following geometric and physical premises:

1. In a linear corrugation with any shape of the guide, zones can be formed in the transverse direction in the form of bands with a sawtooth profile or, in the particular case, in the form of sawtooth lines without stretching or breaking the material.

2. Between two spaced apart squeezed sawtooth tapes or lines, you can form another, middle sawtooth tape or line that is identical with them in profile, but shifted relative to the pinched tapes by the magnitude V of the amplitude of the zigzag lines (Fig.2, b, 2 ,at). If the vertices of the pinched and middle ribbons are connected with a clear design of the ribs, we get a part with a zigzag corrugated structure in the form of a three- or two-row ribbon. Thus, from a workpiece in the form of a linear corrugation, it is possible to pass in the area between the pinched zones to a part with a zigzag corrugated structure without stretching and violating the integrity of the material, i.e. by only isometric transformations.

3. A part with a zigzag corrugated structure can exist in several forms, in particular:

- the part is formed by alternating sawtooth ribbons of rectangular and parallelogram faces (figure 1, a);

- the part is formed by sawtooth ribbons from parallelogram faces alternating with sawtooth ribbons from rectangular faces (Fig. 1, d);

- the part is formed only by sawtooth ribbons from parallelogram faces (figure 1, g).

All of the listed varieties of parts with a zigzag corrugated structure are a special case of the part (Fig. 1, a) and are obtained due to the formation of not sawtooth bands consisting of rectangular faces, but sawtooth lines in jammed areas.

4. The process of forming a part with a zigzag corrugated structure by transition from a linear corrugation is accompanied by an insignificant face deployment (exit from a flat state). However, at the end of the shaping, the faces of the part take a flat shape.

The method is implemented as follows. At the first stage (figure 2, a), the workpiece 11 in the form of a linear corrugation (L-corrugation) is fed into the shaping zone located between sections AA and C'-C '. The workpiece is clamped in zones in the form of two basic sawtooth tapes spaced apart by a distance F. The clamped zones in the form of sawtooth tapes consist of rectangular faces 8 of width P, limited by sawtooth lines 3-10 and 4-10, located in sections A- A and A'-A ', as well as CC and C'-C', respectively. Between the pinched zones, the workpiece retains the original profile, which smoothly passes in sections A'-A 'and CC into a sawtooth profile.

In the next step (Fig. 2, b), a three-row tape of a part with a zigzag corrugated structure is formed between the pinched zones, which includes two zigzag ribbons from parallelogram faces 7, and a middle tape located between them from rectangular faces 9 with a width T. This operation can be carried out in two transitions. First, between the sections bb and b'b 'form the middle sawtooth tape, the profile of which is shifted in the transverse direction by a value of V relative to the profile of the pinched sawtooth tapes (figure 2, c). At the next transition, segments of zigzag lines 7 and 2 are formed, which are part of sawtooth ribbons consisting of parallelogram faces 7. Jamming of zones in the form of sawtooth ribbons between sections A-A and A'-A ', CC and C'-C' , the formation of the median sawtooth tape between sections B-B and B'-B ', as well as the formation of ribbons from parallelogram faces, can be realized using die tooling.

After the formation of a three-row tape, the parts with a zigzag corrugated structure pinch the zones together (Fig. the positions of the parallelogram faces 7. In this case, clear edges are formed along zigzag and sawtooth lines, and the part acquires a cellular structure with a wedge-shaped cell shape.

This completes the operations of the first cycle. The billet is fed into the forming zone at step F and the operations are repeated in a cycle (Fig. 2, e) until a part of the desired length is obtained (Fig. 2, f).

The formation of a zigzag corrugation with a different type of structure (Z-T-corrugation), formed by alternating one middle sawtooth tape from rectangular faces 9 and two sawtooth tapes from parallelogram faces 7 (Fig. 3, a-3, e) are carried out with the same set of operations and in the same sequence. The difference lies in the fact that the jamming of the workpiece is carried out in zones in the form of sawtooth lines 3-4 located in sections AA and CC (Fig. 3, a).

The formation of a zigzag corrugation with the third type of structure (Z-corrugation), composed only of sawtooth ribbons from parallelogram faces 7, is carried out similarly, with the same set of operations and in the same sequence, including jamming the workpiece in zones in the form of sawtooth lines 3-4 (Fig. .4, a) in sections AA and CC. The difference is that between the pinched zones a middle sawtooth tape is formed with a width close to zero, having the appearance of a sawtooth line 5-6, located in section B-B, having the same profile with pinched zones in sections A-A and C-C . At the same time, in the process of forming, a double-row tape of the part with a zigzag corrugated structure is formed, consisting of parallelogram elements 7 (Fig. 4, b).

The rest of the sequence of operations of forming parts Z-corrugation corresponds to the two previous methods (Fig.4, a-4, d).

According to the latter option, in order to obtain parts with clearly defined ribs along zigzag and sawtooth lines at each stage of the cycle, a double-row tape is compressed to the state of a tightly compressed package with a vertical arrangement of faces 7 (Fig. 5, a). Then the tightly compressed package is stretched to the desired block width of the part Z-corrugations (Fig.5, b).

Thus, a method is proposed that makes it possible to obtain a relief part with a zigzag corrugated structure cyclically from a continuous thin-sheet blank in the form of a linear corrugation.

Used sources

1. RF patent No. 1706148, MKI B32V 15/00. A device for the manufacture of products of complex profile from composite material. V.I. Khaliulin, V.E. Desyatov. Publ. bull. No.16 of June 12, 1996

2. RF patent No. 2057647, MKI B29D 9/00. A method of manufacturing a filler from a composite material. V.I. Khaliulin, V.E. Desyatov. Publ. bull. No 10 on 04/10/1996

3. RF patent No. 2118217, MKI V21D 13/00. Device for corrugating sheet material. V.I. Khaliulin, I.V.Dvoeglazov. Publ. bull. No.24 of 08/27/1998

4. RF patent No. 2100120, MKI V21D 13/00. A method of manufacturing a zigzag corrugation (options) and a device for its implementation. V.I. Khaliulin, E.A. Skripkin. Publ. bull. No 36 of 12/27/1997

Claims (2)

1. A method of manufacturing parts with a zigzag corrugated structure, comprising supplying a continuous blank in the form of a linear corrugation to the shaping zone, pinching the blank in two parallel spaced apart zones located transversely to the feed direction of the blank, forming zigzag and sawtooth lines on the blank in accordance with the marking lines on the scan of a zigzag corrugated structure and a cyclic repetition of all operations, characterized in that it is clamped the blank is formed with the formation of pinched zones in the form of two spaced sawtooth lines or sawtooth ribbons consisting of rectangular faces, the formation of zigzag and sawtooth lines on the workpiece is carried out by shaping between the pinched zones of the section of the part with a zigzag corrugated structure in the form of a double-row tape, including two ribbons with parallelogram-shaped faces, or a three-row ribbon comprising two ribbons with parallelogram-shaped faces and located between them and tapes, the middle tape of rectangular faces, while squeezing the workpiece to form sawtooth tapes, the middle tape of a three-row tape formed between the said sawtooth tapes is formed with a profile similar to the profile of sawtooth tapes and shifted in the transverse direction by the amplitude of the zigzag lines of the corrugated structure. 2. The method according to claim 1, characterized in that after shaping between the pinched zones of the part area with a zigzag corrugated structure in the form of a three-row or two-row tape, the pinched zones are brought together until the faces in parallelogram form are completely closed.

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