Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21L—MAKING METAL CHAINS
  • B21L5/00—Making chains or chain links by working the starting material in such a way that integral, i.e. jointless, chains links are formed
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21L—MAKING METAL CHAINS
  • B21L3/00—Making chains or chain links by bending the chain links or link parts and subsequently welding or soldering the abutting ends
  • B21L3/02—Machines or devices for welding chain links
  • B21L3/04—Machines or devices for welding chain links by making use of forge or pressure welding
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
  • F16G13/00—Chains
  • F16G13/12—Hauling- or hoisting-chains so called ornamental chains

Definitions

• the invention relates to a link chain formed from individual, interlinked chain links. Furthermore, the invention relates to a method for producing such a link chain.
• Link chains are made for different purposes and used accordingly.
• a field of application for such chains is mining, are made by the particularly high demands on the chains used.
• mining link chains are used for example as conveyor chains or plow chains, the latter are typically performed in a chain channel.
• the chain links determines the area of application and the load capacity of such a chain.
• conveyor chains for example, it is desirable for them to be as flat as possible despite their high tensile load capacity.
• so-called flat chain links have been developed, which form the vertical links in a conveyor chain, while the horizontal links are those of conventional shape, since the sprocket typically engages them to drive such a chain.
• the flat chain links are typically round steel chain links, made of a wire section whose legs connecting the sheets are compressed.
• Flat link links are also sometimes forged. When forging is more freedom in terms of shaping the flat chain links as compressing the legs connecting the arches.
• forged chain links have become known. Connected with respect to their geometry as flat chain links closed forged chain links by conventional, made of a wire section with a constant over the entire circumference circular cross-sectional area.
• GND chain links In addition to such link chains, in which, as described above, at most every second chain link may have a shape corresponding to the intended use with respect to its shape, GND chain links have become known whose individual chain links consist of a single chain link Bar portion are formed with a different from the typical round cross-sectional shape cross-sectional shape. These chain links, as well as conventional chain links, have, viewed over their circumference, an identical cross-sectional shape and cross-sectional area in the area of the arches and in the area of the legs connecting the two arches.
• each chain link is made from a profiled by a forming process steel section.
• the steel section is formed by pressing, forging or rolling.
• the rod-shaped precursor is bent at the points provided for forming the sheets and connected to each other brought joints.
• cross-sectional geometries can be created that can not be produced by upsetting the legs of finished chain links.
• a disadvantage of this method is that for the production of individual chain links relatively large tolerances in the dimensional accuracy of the individual chain links must be taken into account.
• structures formed by the process of bending the previously formed bar by the forming process can be eliminated or changed.
• the invention is therefore based on the object to propose a link chain and a method for producing such a link chain, with or not only the production of individual chain links with high dimensional accuracy is possible, but in the or in which, unlike the state The technology must be tolerated no appreciable production-related losses in terms of the desired shape of the chain links.
• chain links are forged chain links, wherein at least every second chain link, initially forged as an open chain link with an opening for attaching the chain links or connected thereto, after attaching the or connected thereto Chain links has been closed and the opening limiting shocks are permanently connected.
• the method-related object is achieved by a method having the features of claim 11.
• the links used to connect two links are forged links. These links have been forged as open links. For example, two closed-forged chain links can be connected to one another with these openly forged chain links.
• the links connecting two chain links by means of a forging process, the possibility has been created to form a link chain in which each chain link can have a shape corresponding to the desired properties of the link chain.
• the manufacturer has far more degrees of freedom with regard to the shaping of the individual chain links than is the case with chain links produced from wire or rod sections. This relates in particular to those formations of the chain links in which the bends have a different cross-sectional shape and above all a different cross-sectional area than the legs connecting the bows.
• This chain link which is initially forged open, is closed after suspending the chain link or links and is permanently connected to one another in the region of its joints, for example by welding.
• the open-forged chain link can basically have one or even two openings. However, it is preferred to provide only a single opening. This opening is expediently in the region of one of the two, the arcs of the chain link connecting leg.
• the opposite other leg may be curved by the amount of the opening width.
• the initially curved leg is brought into its intended straight shape.
• Reason- it is also possible to provide an opening by twisting the undivided leg about its longitudinal axis or by a combination of the two above-described possibilities.
• the open-forged links after performing the forging process in their not yet closed state in their dimensions and geometry of the chain link essential elements, such as the formation of the sheets and the transition of the sheets to the legs and the thighs is created by the forging process.
• the arrangement of these elements of the chain link to each other and their geometry does not change or only insignificantly by the process of closing this chain link after hanging the chain links or connected thereto.
• only the straightening of the curved and / or twisted leg is necessary in the exemplary embodiment described above, specifically for so long as the joints bordering the opening of the open-forged chain link adjoin one another.
• all the chain links of the link chain were first prepared as open forged links, as described above.
• the individual chain links are produced by means of a single manufacturing process, with the result that the individual chain links are more similar to one another than if they were produced using two different manufacturing methods, as is the case, for example, with a link chain Chain links as described above open and the second chain link is forged closed.
• FIG. 1 shows a link chain with individual, consecutive, interlinked, forged steel chain links, in a section comprising three chain links
• 2 shows a schematic side view of the middle chain link of the chain section of FIG. 1 in its state after forging with an opening for hooking in the adjacent chain links
• Fig. 3 the closed chain link of Figure 2 and
• Fig. 4 an illustration of the chain section of Figure 1 with the still open chain link of Figure 2 after hanging the adjacent chain links.
• a link chain 1 consists of a plurality of successive, interlinked chain links 2, 3, wherein each adjacent chain links 2, 3 are interlocked.
• the link chain 1 shown only in a section in FIG. 1 consists overall of an alternating sequence of the chain links 2, 3 and at least one chain lock.
• the chain links 2, 3 are steel chain links made by a forging process.
• the chain links 2 have been forged as closed chain links and thus as finished with respect to their final contour chain links.
• the chain links 3 have been forged as open chain links, with the opening of the forged chain link 3 serving for suspending the adjacent chain links 2 before this chain link 3 is closed.
• FIG. 1 shows the chain link 3 closed after suspension of the chain links 2.
• the opening of the forged chain link 3 was arranged in the region of the middle of its one leg 4 and is closed by a weld seam 5 (shown schematically).
• FIG. 2 shows the chain link 3 after completion of the forging process.
• the open-forged chain link 3 has an opening 6, which - as already indicated - for hanging the two adjacent chain links 2 is used.
• the opening 6 is located in the illustrated embodiment in the middle of the opened upper leg 4, which at the end of the forging process initially by the two Schenkelabschnit- te 7, 7 'is formed.
• the two other arches 8, 9 of the chain link 3 connecting the other continuous leg 10 is curved, wherein the center of curvature outside the interior of the chain link 3 and on the leg portions 7, 7 'opposite outside is arranged.
• the joints 1 1, 1 1 'of the leg portions 7, T are thus spaced from each other by the angle of rotation of the curvature of the leg 10.
• the leg 10 is bent straight by applying a pressure applied to one another on the outer sides of the arches 8, 9, thus directed until the joints 1 1, 1 1 'of the leg sections 7, 7' adjoin one another. Subsequently, the leg portions 7, T are welded together, so that the two chain links 2, 3 differ only by the externally visible weld 5 in the chain link 3. With regard to their dimensions and their geometry, the chain links 2, 3 are identical.
• the geometry of the arches 8, 9 and the transitions into the leg sections 7, T or the leg 4 corresponds to the forging process of the desired geometry of these elements of the chain link to be created or almost the nominal geometry, the target geometry of Chain link is achieved by the process of directing the same to close the chain link.
• the target geometry addressed in this context corresponds to the geometry of the chain link before the subsequent steps of a heat treatment and optionally a subsequent cold forming step, for example stretching.
• the suspended in the open chain link 3 chain links 2 are shown in Figure 4. Introduced are the chain links 2 with their flatter and reduced in cross-sectional area compared to the legs leg through the opening 6 of the chain link 3, whose opening width is just enough dimensioned to bring the flat legs of a chain link 2 in the interior of the chain link 3 can.
• the chain links 2, 3 have in the illustrated embodiment, compared to the arches reduced cross-sectional area. Furthermore, in contrast to the arches 8, 9, the legs 4, 10 are characterized by an approximately trough-shaped cross-sectional area, as can be seen in FIG. 4 on the basis of the joint 11 'of the leg section 7'. Since in this link chain 1 all chain links 2, 3 are forged chain links, with this measure, each chain link 2, 3 a Corresponding to the link chain requirements corresponding shape with high dimensional accuracy of the individually produced chain links 2, 3 may be formed within the limits specified by the forging process quasi arbitrary. In the illustrated embodiment, the chain links 2, 3 form and size identical.
• link chain which consists of individual, interlocked forged steel chain links
• the individual chain links also have different shapes and / or sizes. It is therefore readily possible to form such link chains, in which with respect to their shape very differently designed chain links are turned on.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Forging (AREA)
• Chain Conveyers (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=36999974

Family Applications (1)

Country Status (5)

Cited By (3)

Families Citing this family (7)

Citations (3)

Family Cites Families (4)

• 2005
  • 2005-07-09 DE DE200520010844 patent/DE202005010844U1/de not_active Expired - Lifetime
• 2006
  • 2006-06-08 RU RU2007139582/11A patent/RU2007139582A/ru not_active Application Discontinuation
  • 2006-06-08 DE DE112006001214.2T patent/DE112006001214B4/de not_active Expired - Fee Related
  • 2006-06-08 CN CN2006800250481A patent/CN101218451B/zh not_active Expired - Fee Related
  • 2006-06-08 PL PL384216A patent/PL213671B1/pl unknown
  • 2006-06-08 WO PCT/EP2006/062990 patent/WO2007006612A1/de active Application Filing

Patent Citations (3)

Also Published As

Similar Documents

Legal Events