CN210739584U - Pipe fitting semi-finished product and heading and connecting forming system - Google Patents

Abstract

The utility model discloses a pipe fitting semi-manufactured goods connects forming system with upsetting. The semi-finished pipe fitting comprises a pipe fitting, wherein the pipe fitting is provided with a first end face, and the pipe fitting comprises a forming section for forming the step-shaped convex part, an auxiliary forming section and an upsetting section for connecting the forming section and the auxiliary forming section. The upsetting and connecting forming system is used for forming step-shaped convex parts on the pipe fitting, the upsetting and connecting forming system comprises a station pipe contracting die and a station step forming die, the station pipe contracting die comprises a first die body, the first die body is provided with a reducing hole and a crimping surface used for forming an upsetting and connecting section on the pipe fitting, and the crimping surface is arranged at an opening. Compare in the assembly that adopts welding process to realize pipe fitting and flange spare, the utility model discloses a form step form convex part and flange spare assembly on the pipe fitting of system of joining in the head, overcome a great deal of defect that welding process exists, simultaneously, the utility model discloses still connect the section and set up the crimping face at the opening part through forming the head on the pipe fitting, guaranteed the size and the roughness of step form convex part.

Description

Pipe fitting semi-finished product and heading and connecting forming system

[ technical field ] A method for producing a semiconductor device

The utility model relates to a pipe fitting semi-manufactured goods connects forming system with upsetting, it can be used for right to connect forming system to upset pipe fitting semi-manufactured goods connect processing.

[ background of the invention ]

Pipes are widely used in various fields as carriers for transporting materials. Taking an aluminum pipe in a metal pipe as an example, when the aluminum pipe is applied to an air conditioning pipe in an automobile air conditioning system, the aluminum pipe needs to be connected with a compressor of an automobile air conditioner through a flange, in the prior art, the aluminum pipe is usually connected with the flange by a welding process, specifically: cleaning a pipeline, welding a flange and cleaning after welding. However, as is well known, the welding flange has large processing amount, wastes materials, has high production cost and serious environmental pollution, the verticality between the flange and the aluminum pipe is not easy to ensure by adopting a high-efficiency welding method, 30% of products need to be corrected, and more seriously, the welding process has the possibility of leakage, and the product qualification rate cannot be ensured.

Therefore, it is desirable to design a new technical solution to solve the above technical problems.

[ Utility model ] content

The utility model discloses the technical problem that will solve lies in: provides a pipe fitting semi-finished product and an upsetting forming system, and the yield of the final product is higher.

In order to solve the above problem, the utility model discloses following technical scheme can be adopted: a semi-finished pipe fitting comprises a pipe fitting, wherein the pipe fitting is provided with a first end face and a second end face, and the pipe fitting comprises a forming section for forming a step-shaped convex part, an auxiliary forming section for forming the first end face and an upsetting section for connecting the forming section and the auxiliary forming section.

In a preferred embodiment, the upset section is an inclined section extending from the auxiliary forming section to the forming section along the axial direction of the pipe, and the included angle between the extension line of the upset section and the inner surface of the auxiliary forming section is 15-23 degrees when viewed from the axial section of the pipe.

In a preferred embodiment, the included angle between the extension line of the upsetting section and the inner surface of the auxiliary forming section is 16-20 degrees.

In a preferred embodiment, the included angle between the extension line of the upsetting section and the inner surface of the auxiliary forming section is 17-19 degrees.

In a preferred embodiment, the semi-finished pipe further comprises a flange member sleeved on the pipe, and the forming section is located between the flange member and the upsetting section.

In order to solve the above problem, the utility model discloses following technical scheme still can be adopted: the utility model provides an upset molding system that connects for form a step form convex part on a pipe fitting, the pipe fitting has first terminal surface and second terminal surface, upset molding system that connects includes station draw mould and station draw step mould, station draw mould includes first mould body, first mould body is formed with one end open-ended reducing hole and is used for form an upset crimping face that connects the section on the pipe fitting, the crimping face sets up the opening part.

In a preferred embodiment, the first die body has a first inner surface circumferentially surrounding the reduced diameter hole, the crimping surface is an inclined surface, and an angle between an extension line of the crimping surface and the first inner surface is 15 to 23 degrees when viewed from an axial section of the pipe fitting.

In a preferred embodiment, an angle between an extension line of the crimping surface and the first inner surface is 16-20 degrees.

In a preferred embodiment, an included angle between an extension line of the pressure contact surface and the first inner surface is 17-19 degrees.

In a preferred embodiment, the station step-forming die is provided with a second die body, the second die body is provided with an upsetting connecting hole with an opening at one end, a second inner surface positioned on the inner side of the upsetting connecting hole and an upsetting connecting part arranged at the opening, the pipe fitting is provided with an auxiliary forming section which is provided with the first end surface and connected to the upsetting connecting section corresponding to the reducing hole, and the distance from the upsetting connecting part to the second inner surface is longer than the length of the auxiliary forming section along the axial direction of the upsetting connecting hole so that the second inner surface does not apply force to the first end surface in the upsetting connecting process.

Compared with the prior art, the utility model discloses following beneficial effect has: compared with the traditional method of assembling the pipe fitting and the flange part by adopting a welding process, the utility model discloses a step-shaped convex part is formed on the pipe fitting by the upsetting forming system and is assembled with the flange part, thus overcoming a plurality of defects existing in the welding process; and simultaneously, the utility model discloses still pass through form on the pipe fitting and upset the section and set up the crimping face at the opening part for the stress point that the upset connects moves forward, is favorable to making the shaping section form bigger diameter step form convex part also is favorable to improving the roughness on step form convex part surface reaches the roughness of transition surface between step form convex part and the supplementary shaping section.

[ description of the drawings ]

Fig. 1 is an axial cross-sectional view of a preferred embodiment of the semi-finished pipe of the present invention, wherein the pipe is shown only partially.

Figure 2 is an axial cross-sectional view of a pipe assembly made by further processing the pipe blank of figure 1.

Fig. 3 is the utility model discloses the axial cross section that the pipe expanding mould of heading joint forming system carries out the pipe expanding technology to the pipe fitting semi-manufactured goods that fig. 1 shows, wherein, the pipe fitting all has the part not shown with the die clamper.

Fig. 4 is an axial cross-sectional view of the pipe shrinking process performed by the station pipe shrinking mold of the upsetting-connecting forming system on the pipe expanding semi-finished product of fig. 3, wherein a local enlarged view is included.

Fig. 5 and fig. 6 are axial cross-sectional views of the pipe fitting semi-finished product after the completion of the pipe contracting process shown in fig. 4, which are formed by upsetting the forming system of the present invention, wherein fig. 5 is a process of just beginning to upset, fig. 6 is a process of just completing the upsetting, and fig. 5 and fig. 6 both include a partial enlarged view.

[ detailed description ] embodiments

The technical solutions of the embodiments of the present invention are explained and explained below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, other embodiments obtained by the skilled in the art without creative work all belong to the protection scope of the present invention.

Referring to fig. 1 and 2, the present invention provides a tube blank 100 that can be further processed to form a tube assembly 200 as a blank. The pipe assembly 200 is used for, but not limited to, an air conditioning pipe for an automobile, the pipe assembly 200 has a stepped boss 201, and includes a sealing ring 202 that cooperates with the stepped boss 201 to achieve a sealed connection between the pipe assembly 200 and an air conditioning compressor (not shown) of an automobile.

With continued reference to fig. 1 and 2, the tubular semi-finished product 100 includes a tubular member 1 and a flange member 2. The pipe member 1 has a first end surface 10 and a second end surface (not shown), and the pipe member 1 includes a forming section 11 for forming the stepped protrusion 201, an auxiliary forming section 12 formed with the first end surface 10, and an upsetting section 13 connecting the forming section 11 and the auxiliary forming section 12. The upset connects section 13 to be arranged in supplying an external equipment (not shown) to upset in the process of connecing, the utility model discloses a set up the upset connects section 13 to make the stress point that the upset connects move forward, is favorable to making shaping section 11 forms bigger diameter step form convex part 201, simultaneously, is favorable to improving the roughness on step form convex part 201 surface reaches the roughness of step form convex part 201 and the supplementary shaping 14 of transition surface between the section 12, reduce promptly the sunken and the crackle on step form convex part 201 surface has reduced the sunken degree of transition surface 14. When the step-shaped protrusion 201 is engaged with the sealing ring 202, a front end surface (not labeled) of the step-shaped protrusion 201 can provide a flat sealing surface for the sealing ring 202, and the sealing effect is good. The upsetting section 13 is an inclined section extending from the auxiliary forming section 12 to the forming section 11 along the axial direction of the pipe 1. When viewed from the axial section of the pipe fitting 1, the included angle theta between the extension line of the upsetting section 13 and the inner surface 121 of the auxiliary forming section 12 is 15-23 degrees. If the included angle theta is smaller than 15 degrees, force application by external equipment is not facilitated in the upsetting process, namely, the step-shaped convex part 201 is not facilitated to be formed; if the included angle θ is greater than 23 degrees, the pipe 1 may be deformed during the upsetting process, i.e., it is difficult to secure the diameter of the pipe 1. Preferably, the included angle theta between the extension line of the upsetting section 13 and the inner surface 121 of the auxiliary forming section 12 is 16-20 degrees; more preferably, the included angle theta between the extension line of the upsetting section 13 and the inner surface 121 of the auxiliary forming section 12 is 17-19 degrees; taking a 5049 aluminum pipe as an example, since the hardness thereof is larger than that of a general aluminum pipe, the angle θ between the extension line of the upsetting section 13 and the inner surface 121 of the auxiliary forming section 12 is preferably selected to be about 18 degrees.

With continued reference to fig. 1 and 2, the flange member 2 has a mounting hole 20, and the flange member 2 is preferably fitted over the pipe member 1. On the pipe semi-finished product 100, the forming section 11 is located between the flange member 2 and the upsetting section 13, and after the upsetting process is completed, the stepped convex portion 201 is located between the flange member 1 and the auxiliary forming section 12, that is, the upsetting section 13 and the forming section 11 are transformed into the stepped convex portion 201 and the transition surface 14 during the upsetting process. Of course, in other embodiments, the flange member 2 may or may not be installed as the case may be.

Referring to fig. 3 to 6, the present invention further provides an upsetting forming system (not shown) that can be used to form the step-shaped protrusion 201 on the pipe semi-finished product 100. The upsetting forming system comprises a station pipe expanding die 3, a station pipe contracting die 4, a station step forming die 5 and a clamping die 6.

Referring to fig. 3, the station pipe expanding die 3 comprises an inner pipe expanding core 30, and the inner pipe expanding core 30 can expand and contract along the radial direction. In the pipe expanding forming process, the pipe fitting 1 is clamped by the clamping die 6, firstly, the pipe expanding inner core 30 is inserted into the pipe fitting 1 in the inner contraction state, then, the pipe expanding inner core 30 is expanded along the radial direction to expand the pipe fitting 1, and finally, the pipe expanding inner core 30 is pulled out of the pipe fitting 1 in the inner contraction state. Of course, in other embodiments, the station pipe expanding die 3 may not be provided, and the pipe 1 may be directly contracted by the station pipe contracting die 4.

Referring to fig. 1 and 4, the pipe contracting die 4 comprises a first die body 40, the first die body 40 is formed with a reducing hole 402 having an opening 401 at one end and a crimping surface 403 for forming the upset section 13 on the pipe 1, the crimping surface 403 is disposed at the opening of the reducing hole 402, the reducing hole 402 is expandable and contractible in a radial direction, the clamping die 6 is held stationary for clamping the pipe 1 during the pipe contracting process, the first die body 40 is first placed over one end of the pipe 1, the diameter of the reducing hole 402 is then contracted partially, the crimping surface 403 is formed with the upset section 13 corresponding to the pipe 1, finally, the first die body 40 is pulled out in an expanded state, further, the first die body 40 has a first inner surface 404 surrounding the reducing hole 402, the crimping surface 403 is an inclined surface, the angle between the extension of the crimping surface 403 and the first die 403 is preferably 5023, the angle between the extension of the first die body 403 and the inner surface 3623 is preferably smaller than the angle between the extension of the first die 403 and the inner surface 3615 degrees 3623, the extension of the aluminium pipe 1 is preferably smaller than the angle between the extension of the first die 403 and the extension of the aluminium pipe 23, the extension 3615 degrees 3623, the extension of the die 403 is preferably 20, the extension 3615 degrees 3623, the extension of the extension 3623 is smaller than the extension 3615 degrees 3623, the extension of the extension 3623, the extension of the extension.

Referring now to fig. 5 and 6, the stepped station die 5 has a second die body 50, the second die body 50 being formed with an upset bore 502 having an end opening 501, a second inner surface 503 located inside the upset bore 502, a third inner surface 504 circumferentially surrounding the upset bore 502, an upset 505 disposed at the opening 501, and a first restraint slot 506. Referring to fig. 1 and 2, in the axial direction of the upset hole 502, the distance from the upset portion 505 to the second inner surface 503 is longer than the length of the auxiliary forming section 12 so that the second inner surface 503 does not apply a force to the first end surface 11 during the upset process. So arranged, during upsetting, the stepped die 5 does not exert a force on the first end face 11 of the tube 1, and the applicant has surprisingly found that there is a great improvement in the flatness of the surface of the stepped protrusion 201 and the flatness of the transition surface 14, that there are few depressions and cracks in the surface of the stepped protrusion 201, and that there are few depressions in the transition surface 14, even for harder materials such as 5049 aluminum tubes. During upsetting, the upset portion 505 applies force to the upset section 13 to spread the forming section 11 outward in the radial direction to form the stepped convex portion 201, and the upset portion 505 preferably acts on the upset section 13 at a side close to the auxiliary forming section 12.

Referring to fig. 2, 5 and 6, the second die body 50 is further provided with a pressing surface 507 in the upsetting connection hole 502, the pressing surface 507 is used for forming a guide surface 15 at the first end surface 11 of the pipe 1 during upsetting connection, an included angle β between an extension line of the pressing surface 507 and the third inner surface 504 is 14-16 degrees, if the included angle β is greater than 16 degrees, the flatness of the surface of the stepped convex portion 201 and the transition surface 14 is affected, and if the included angle β is less than 14 degrees, the formed guide effect of the guide surface 15 is not good.

To sum up, compared with the traditional method of assembling the pipe fitting 1 and the flange fitting 2 by adopting a welding process, the upsetting forming system of the invention forms the step-shaped convex part 201 on the pipe fitting 1 to be assembled with the flange fitting 2, thereby overcoming the defects of the welding process; and simultaneously, the utility model discloses still through form on the pipe fitting 1 the upset connects section 13 and will crimping face 403 sets up opening 401 department for the stress point that the upset connects moves forward, is favorable to making shaping section 11 forms bigger diameter step form convex part 201 also is favorable to improving the roughness on the surface of step form convex part 201 reaches the roughness of transition surface 14. Particularly for harder 5049 aluminum tubes, those skilled in the art have been unable to machine 5049 aluminum tubes to form the desired stepped protrusions 201 and seal surfaces that fit well with the seal ring 202.

It is to be understood that the above-described embodiments of the present invention can be combined with each other to obtain further embodiments, without conflict. The various features described in the foregoing detailed description may be combined in any suitable manner without departing from the scope of the invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like are used in the orientation or positional relationship indicated in the drawings, which is only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Claims (10)

1. A semi-finished pipe comprising a pipe having a first end face and a second end face, characterized in that: the pipe fitting comprises a forming section for forming a step-shaped convex part, an auxiliary forming section formed with the first end face and an upsetting section for connecting the forming section and the auxiliary forming section.

2. A tubular semifinished product according to claim 1, wherein: the upsetting section is an inclined section extending from the auxiliary forming section to the forming section along the axial direction of the pipe fitting, and the included angle between the extension line of the upsetting section and the inner surface of the auxiliary forming section is 15-23 degrees when the axial cross section of the pipe fitting is seen.

3. A tubular semifinished product according to claim 2, wherein: and the included angle between the extension line of the upsetting section and the inner surface of the auxiliary forming section is 16-20 degrees.

4. A tubular semifinished product according to claim 3, wherein: and the included angle between the extension line of the upsetting section and the inner surface of the auxiliary forming section is 17-19 degrees.

5. A tubular semifinished product according to any one of claims 1 to 4, wherein: the semi-finished product of the pipe fitting further comprises a flange piece sleeved on the pipe fitting, and the forming section is located between the flange piece and the upsetting section.

6. An upset forming system for forming a stepped projection on a tubular member, the tubular member having a first end face and a second end face, the system comprising: the upsetting and connecting forming system comprises a station pipe reducing die and a station step forming die, the station pipe reducing die comprises a first die body, the first die body is provided with a reducing hole with an open end and is used for forming a pressing surface of an upsetting and connecting section on the pipe fitting, and the pressing surface is arranged at the opening.

7. The upset-splicing forming system of claim 6, wherein: the first die body is provided with a first inner surface which circumferentially surrounds the reducing hole, the crimping surface is an inclined surface, and an included angle between an extension line of the crimping surface and the first inner surface is 15-23 degrees when viewed from an axial section of the pipe fitting.

8. The upset-splicing forming system of claim 7, wherein: the included angle between the extension line of the pressure welding surface and the first inner surface is 16-20 degrees.

9. The upset-splicing forming system of claim 8, wherein: and the included angle between the extension line of the pressure joint surface and the first inner surface is 17-19 degrees.

10. The upset-splicing forming system of claim 6, wherein: the station becomes step mould and has second mould body, second mould body is formed with one end open-ended upset hole, is located the inboard second internal surface in upset hole is in with the setting the portion of connecing of opening part, the pipe fitting is corresponding to the reducing hole is formed with have first terminal surface and connect in the upset connects the supplementary shaping section of section, follows on the axial direction in upset hole, upset portion arrives the distance of second internal surface is compared the length of supplementary shaping section is long so that at the upset in-process the second internal surface can not be right first terminal surface application of force.

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