Crimping fitting coupling for joining tubes and crimping die set

FIELD: plastic metal working, possibly in crimping machines.

SUBSTANCE: crimping die set and coupling are used for holding worked part in crimping machine. Coupling is placed onto worked part with possibility of unclamping and it has fist clamping portion and second clamping portion mutually joined through hinge. Crimping die set may be inserted to crimping machine. Said die set has groove for worked part and recess for coupling on its working surface. Recess for coupling has configuration necessary for holding coupling in it. In order to crimp part in crimping machine, coupling is arranged around part in predetermined position and then it is tightened around part. Coupling and article are inserted into recess for coupling and groove for article respectively in crimping die set. Then die set with coupling and article is placed into crimping machine.

EFFECT: enhanced efficiency and reliability of crimping process.

13 cl, 6 dwg

 

BACKGROUND of INVENTION

This invention relates in General to machines for the compression, more precisely to crimp couplings and stamps used for holding pipes in such machines during the process of compression.

Compression involves the narrowing of the rod or pipe, for example by forging, hammering or compressing. Compression may also include a connection together of the two components using a similar manipulation. For example, the fitting as the coupling element can be attached to the outer surface of the pipe by means of any of the operations of forging, hammering or compressing. Usually the fitting wear on the outer side of the rod or tube and then subjected to compression to a specified position, preferably essentially in the place where he is. Compression is a common method used in practice to attach the fittings to the pipe. Many pipes can be connected together using fittings that were attached to either or both ends of the pipe by compression.

Although compression can be performed manually, machines for compression are used to automate and facilitate the process of attaching a fitting to the pipe by compression. There is a large variety of machines for compression. Most of them include means for holding one or the more crimp dies. Crimping stamp ensures retention of the fitting and pipe in place during compression. When the fitting and pipe are located in a predetermined position in the blooming stamp, pressure is applied to the outer surface of the fitting where it is in contact with the outer surface of the pipe. This is achieved or by turning parts, pipe, rod, or etc. that is to be processed, or by turning the device for crimping around the part that remains in a fixed position. Alternatively, pressure may be applied to the tubular workpiece from the inside of the pipe through the extender. This is called internal compression by means of rollers.

In most cases, the more fitting pipes. Taking into account the fact that two elements are [fitting and pipe are in close proximity to each other within the crimping stamp or set of crimp dies, you must have a means for gripping the pipe inside crimp stamped with the aim of holding it securely in place during compression. This tool is installed on the sealing seat, an annular insert, which insert the pipe and which is located in a recess in the blooming stamp. The insert is usually made of non-metallic material, such as nylon. Nylon insert provides Podkletnov is the tube in place inside the crimp die. When the internal compression by means of rollers for the purpose of installing the fitting and pipe in a predetermined position using the package from opposite halves of the stamp. Each half has a nylon insert to form the ring. The pipe and fittings installed in one of the halves and then clamp in a predetermined position when the second half of the crimping stamp match with the first.

It was found that nylon insert does not provide adequate holding the pipe in place during compression. Namely, since the insert is made from a viscoelastic material, it often does not provide the proper application of the clamping forces during compression associated with significant stress. The result is that the pipe is rotated and/or shifted in axial direction during the execution of the compression. In addition, the magnitude of the clamping forces generated in the package crimping stamp depends on the tolerances separate crimp die and wear crimping stamp when using nylon inserts. Therefore, the operator is often necessary to hold the tube in place to prevent rotation and displacement in the axial direction. This limits the effectiveness of the automated compression, minimizes the ability of the operator to perform other tasks and increases the production of defective item is. Therefore, there is a need to create a crimp tooling and fixtures to mate crimp seal with the pipe, which guarantees the retention of the pipe and the fitting in place during compression.

SUMMARY of the INVENTION

This need is provided by the present invention in accordance with which the proposed site, consisting of a crimping die and clutch designed to hold pipe and fitting in place in the machine for crimping. The site includes a clutch mounted on the workpiece with the possibility of the brakes, and crimping stamp made with the possibility of inserting into a machine for crimping. Crimping stamp has a slot machined part and the recess for coupling performed on the working surface of the crimp die. Excavation of a coupling made with such a configuration, which enables retention of the coupling, which, in turn, is attached to the workpiece with the inclusion of her. The coupling has a first clamping portion and the second clamping part, which are connected together during compression. For curved workpiece coupler has at one of its end surfaces of the beveled portion intended to accommodate the curved part of the workpiece. The recess for coupling the coupling may have a sixth is Ugolino form. In the case when the fitting must be attached to the workpiece by swaging, on the working surface of the crimping stamp formed recess for fitting. In addition, detail, simulating the fitting, can be used for fixing the position of the coupling on the workpiece before the last compression fitting.

The essence of the present invention and its advantages compared with the prior art will become apparent when studying the following detailed description and appended claims, given with reference to the accompanying drawings.

Description of the DRAWINGS

The subject invention specifically identified and clearly stated in the final part of the description. However, the invention can be better understood upon studying the following description, considered in conjunction with the accompanying drawings, in which:

In Fig. 1 shows a perspective view of the first variant implementation of the site, consisting of crimping stamp and couplings according to the present invention, while Fig. 1 shows one of the two parts of the crimping stamp representing mirroring each other, and the pipe is installed by fitting and coupling.

In Fig. 2 depicts a top view of part of the crimping stamp in Fig. 1 with a pipe, fitting and coupling installed in the specified position.

In Fig. 3 the image is perspective view of the coupling of the first variant implementation of the present invention, which is shown partially open.

In Fig. 4 depicts a perspective view of the second variant implementation of the site, consisting of crimping stamp and couplings according to the present invention, it is shown that one of the two parts of the crimping stamp representing mirroring each other, and the pipe is installed by fitting and coupling.

Figure 5 shows a top view of part of the crimping stamp in Fig. 4 with the pipe, fitting and coupling installed in the specified position.

Figure 6 depicts a perspective view of the coupling of the second variant of implementation of the present invention, which is shown partially open and beveled part for receiving a pipe with a short straight section for compression.

DETAILED description of the INVENTION

As shown in the drawings, in which identical reference numbers denote the same elements, Fig. 1 and 2 show the first node 10, which consists of a crimping die and coupling and which can be used in the car for compression order compression of the workpiece, such as tube 12 and fitting 14. The node 10 includes stamp 16 and the sleeve 18, which together hold the pipe 12 and the fitting 14 in place during compression. Crimping stamp has a recess 20 for fitting in the recess 22 of a coupling and the groove 24 to the pipe on the working surface 26 crimping stamp, ensuring retention.

The recess 20 for fitting groove 24 for the pipe can be made of such dimensions that provide for placement of the fitting 14 and the pipe 12 with defined dimensions. The clutch 18 is made with a configuration that minimizes the possibility of its rotation within the recess 22 for coupling during operation of the compression. Although you can perform many configurations, protects against rotation, one option is to perform a recess 22 for coupling with a hexagonal shape. In this form of the hollow sleeve 18 may also have a hexagonal shape, as shown in figures 1 and 3. Of course, other types of resistance to rotation of the elements can form part of the clutch 18 and/or the notches 22. As one example of this is the introduction to the design of the adjusting screw.

As also shown in Fig.1-3, the recess 22 of a coupling has dimensions greater than the outer dimensions of the coupling 18. Can be made small gap between the side walls of the recess 22 for coupling and coupling 18 when the coupling is in place in the recess 22 of a coupling. A small gap allows easy insertion and removal of the coupling 18, when he put on the pipe 12, as shown in figure 1. However, this gap should not have such a large amount, in which there is a possibility of significant movement of the clutch 18 in the longitudinal direction in life safety is mnom stamp 16.

Crimping stamp 16 and sleeve 18 may be made of any material suitable for crimping of machined parts. Crimping stamp 16 and sleeve 18 may be made of the same material, such as steel. Alternatively, any of the elements or both elements may be made of other suitable materials, including aluminum, stainless steel, titanium or Nickel alloys, but possible materials are not limited to the above. Coupling 18, as shown in figure 3, has a first clamping portion 28 and the second clamping part 30. The first clamping portion 28 and the second clamping part 30 are connected together by means of a hinged connection 32. The second clamping part 30 has on the surface of the coupling clamp coupling or clamp, such as clamp bolt 34. The clamping bolt 34 has a pivot bolt 36 and the head 38 of the bolt. The shank 36 of the bolt is designed to insert inside made in the first clamping part 28 of the groove 40 of the coupling. The groove 40 of the coupling has retention tabs 42, on which rests the head 38 of the bolt, when the workpiece is located between the parts 28 and 30. The head 38 of the bolt can be made with a groove or to have a similar tool to tighten, so that when tightening the bolt relative to the protrusions 42 of the workpiece remains fixed in place. Swivel 32 creates a simple tool for odergivaniya 28 and 30 together and enables easy insertion and removal of the workpiece. In an alternative embodiment, the sleeve may be made of two separate parts, which are connected to each other without the possibility of rotation relative to each other. Instead, two separate pieces can be joined together by using alternative means of fastening the coupling, such as a set of bolts and corresponding nuts, along with other commonly used means of connection.

The node 10 in figure 1-3, consisting of a crimping die and coupling, allows secure installation of the workpiece, such as the pipe 12, in a machine for crimping. He resolves problems associated with the use of nylon inserts. In particular, it prevents rotation of the workpiece and the displacement of the workpiece in the longitudinal direction. It eliminates the need for the operator to manually hold the workpiece in place during the operation of the compression. In addition, detail, simulating the fitting ("false" fitting)can be used before inserting the workpiece into the crimping stamp 16. Detail, simulating the fitting, in particular the fitting of this type, which is subject to compression, can be installed in the appropriate position on the tube 12. After that, the clutch 18 can be fixed in a predetermined position on the tube 12. This operation may be the head of the Shen before initiating the process of compression. The fitting is subject to compression, and the pipe 12 together with the sleeve 18, is fixed in a predetermined position, and then inserted into the corresponding notches on the working surface 26 crimp die. After this machine for compression can be powered, and when the clutch 18 in proper position guaranteed accurate displacement of the fitting 14 back on the pipe 12. You can also avoid the impact on the process of wear of the rollers and vibration tolerances crimping stamp.

The node 10 in Fig. 1-3 is suitable for holding a workpiece such as a pipe 12, which has a long straight section. However, such a kit may not be suitable for workpieces with short straight sections in relation to the location of the fitting is subject to compression. Figs.4-6 illustrates the second variant implementation of the present invention, suitable for workpieces with short straight section. The second node 50, consisting of crimping stamp and couplings may be used in the car for compression order compression short details such as the curved pipe 52, and the fitting 14. Node 50 includes crimping stamp 54 and the sleeve 56, which together hold the pipe 52 and the fitting 14 in place during compression. Crimping stamp has a recess 58 for fitting, the recess 60 for coupling and f is some groove 62 for trumpet and best but the optional hole 64 to the extender on the working surface 66 crimping stamp, ensuring retention.

The recess 58 for fitting can be made of such size that provide for placement of the fitting 14 with defined dimensions. Made with a chamfer groove 62 to pipe allows insertion tube, having a very short straight sections, crimping stamp 54 without affecting the curved part of the pipe 52, which is not retained in the blooming stamp 54. Crimping stamp 54 may also be provided with a hole 64 that enables the insertion of the expander 68, if the tube 52 should be expanded in the area, which must be posted by the fitting 14.

The clutch 56 is made of such a configuration that minimizes the possibility of its rotation within the recess 60 for coupling during operation of the compression. Although you can perform many configurations, protects against rotation, one option is to perform a recess 60 for coupling with a hexagonal shape. In this form of the hollow sleeve 56 may also have a hexagonal shape, as shown in figure 4 and 6. The recess 60 for the clutch has dimensions greater than the outer dimensions of the coupling 56. Can be made small gap between the side walls of the recess 60 for the clutch and the clutch 56, when the coupling is in place in the recess 60 for mu is you. A small gap allows easy insertion and removal of the clutch 56, when it is attached to the pipe 52, as shown in figure 4. However, this gap should not have such a large amount, in which there is a possibility of significant movement of the clutch 56 in the longitudinal direction in the blooming stamp 54.

Crimping stamp 54 and the sleeve 56 can be made of any material suitable for crimping of machined parts. Crimping stamp 54 and the sleeve 56 can be made of the same material, such as steel. Alternatively, any of the elements or both elements may be made of other suitable materials, including aluminum, stainless steel, titanium or Nickel alloys, but possible materials are not limited to the above. Clutch 56, shown in Fig.6, has a first clamping portion 70 and the second clamping portion 72. The first clamp part 70 and the second clamping portion 72 are connected together by swivel 74. The second clamping portion 72 has on the surface of the coupling clamp coupling or clamp, such as clamp bolt 76. The clamping bolt 76 has a pivot bolt 78 and the head 80 of the bolt. The rod 78 of the bolt is designed to be inserted inside the groove of the coupling is essentially the same as in the construction and locking mechanism coupling 18 figure 3. Swivel 74 provides a simple means for holding the parts 70 is 72 together and makes simple operations of insertion and extraction of the workpiece. To allow placement of the curved pipe section 52, the second clamping portion 72 has a chamfer or recess 82 on its vertical surface, nearest to the curved section.

Node 50 figs.4-6, consisting of a crimping die and coupling, allows secure installation of the workpiece with a short straight section, such as pipe 52, in a machine for crimping. He resolves problems associated with the use of nylon inserts. In particular, it prevents the rotation and displacement of the curved workpiece in the longitudinal direction. It eliminates the need for the operator to manually hold the workpiece in place during the operation of compression that may be particularly difficult in the case of a curved workpiece. As in the node 10, detail, simulating the fitting ("false" fitting)can be used before inserting the workpiece into the crimping stamp 54. Detail, simulating the fitting, in particular the fitting of this type, which is subject to compression, can be installed in the appropriate position on the pipe 52. After that, the clutch 56 may be fixed in a predetermined position on the pipe 52. This operation can be completed before initiating the process of compression. The fitting is subject to compression, and the pipe 52 with the clutch 56, recorded in the data position, then inserted into the corresponding notches on the working surface 66 crimp die. After this machine for compression can be powered, and when the clutch 56 in proper position guaranteed accurate displacement of the fitting 14 back on the tube 52. You can also avoid the impact on the process of wear of the rollers and vibration tolerances crimping stamp.

Above has been described an improved site, consisting of crimping stamp and couplings. Despite the fact that have been described particular embodiments of the invention for specialists in this area, obviously, can be made of various modifications without departing from the essence and scope of the invention defined in the attached claims.

1. The node (10, 50) of the crimp die and clutch designed to hold the workpiece in a machine for crimping, including the clutch (18, 56)mounted on the workpiece with the possibility of the brakes, and the clutch (18, 56) has a first clamping portion (28, 70) and the second clamping part (30, 72), pivotally connected together, and crimp stamp (16, 54), made with the possibility of inserting into a machine for compression, while the crimping stamp (16, 54) has a groove (24, 62) for the workpiece and the recess (22, 60) for coupling to the working surface (26, 66) crimping stamp, and a recess (22, 60) for coupling the imp is replaced with the configuration, providing the possibility of holding in her clutch (18, 56).

2. The node according to claim 1, in which the second clamping part (30, 72) includes a clamping bolt (34, 76), designed to clamp the clutch (18, 56) around the workpiece with brakes, with the clamping screw (34, 76) connects the first clamping part (28, 70) and the second clamping part (30, 72).

3. The node of claim 1, wherein the workpiece is a curved workpiece, and the second clamping part (72) of the clutch (56) has a beveled end surface (66) and crimping stamp (54) has an opening for a workpiece made from a facet.

4. The node according to claim 1 which further includes means preventing rotation, so that the clutch does not rotate within the recess (22, 60) for coupling.

5. The node of claim 1, wherein the working surface (26, 66) crimping stamp additionally has a recess (20, 58) for fitting designed to hold the fitting in it.

6. The node of claim 1, wherein the workpiece is a pipe, and a working surface (66) crimping stamp additionally has a hole (64) to the extender designed for insertion of the dilator into it.

7. The method of compression of a workpiece in a machine for crimping, comprising the following operations: install clutch (18, 56) around the workpiece in a predetermined position, and the clutch (18, 56) who meet the first clamping part (28, 70) and the second clamping part (30, 72), pivotally connected together, tightening the clutch (18, 56) around the workpiece, the insert sleeve (18, 56) and the workpiece, respectively, in the recess (22, 60) for coupling and groove (24, 62) for machined parts, made in the blooming stamp (16, 54), and the insertion of a crimping stamp (16, 54) clutch (18, 56) and the workpiece in a machine for compression.

8. The method according to claim 7, further comprising before the installation operation of the clutch (18, 56) around the workpiece operation installation details, imitating the fitting on the workpiece in a defined position and after installing and tightening the clutch (18, 56) the operation of removing the details that mimic the fitting and installation on the workpiece fitting to be connected to the workpiece by compression.

9. The method according to claim 7, further comprising an operation execution recesses (20, 58) for fitting on the working surface (26, 66) crimping stamp, designed for insertion into it of the fitting to be connected to the workpiece by compression.

10. The method according to claim 7, in which the workpiece is a pipe further includes the operation of education apertures (64) to the extender on the working surface (66) crimping stamp (54).

11. The method according to claim 7, further comprising an operation execution chamfer (82) on the end p of the surface of the second clamping part (72).

12. The method according to claim 11, further comprising the operation of education completed chamfered holes (62) for the pipe on the working surface (66) crimping stamp (54).

13. The method according to claim 7, further comprising performing the notches (22, 60) for coupling and clutch (18, 56) hexagonal shape.



 

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