High-temperature gas online heating gas expansion forming device

Abstract

The utility model discloses a high-temperature gas online heating gas expansion forming device which comprises a forming die and a high-temperature gas heating mechanism. A mold cavity and two hot air channels communicated with the mold cavity are formed in the forming mold; the high-temperature gas heating mechanism comprises a gas heater and a hot gas conveying pipeline, and the gas heater is communicated with the hot gas channel through the hot gas conveying pipeline; the forming die comprises an upper die and a lower die, and the die cavity comprises an upper die cavity arranged on the upper die and a lower die cavity arranged on the lower die; and the hot air channels are arranged on the upper die and the lower die. According to the high-temperature gas online heating gas expansion forming device, the pipe fitting is heated online through the high-temperature gas, operation is easy, energy consumption is reduced, and the heating effect is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipe fitting forming processing equipment, concretely relates to a high temperature gas on -line heating air -enlargement forming device. BACKGROUND

[0002] According to the different mould specifications and uses, the traditional forming method of metal pipe class material has many kinds, wherein the casting, forging process application is the most widely. But the two processes all have the problems such as great labor intensity of workers, low production efficiency, high scrap rate of blank products. People successively developed a kind of forming processing method that relies on the pressure machine and die to exert external force to pipe material, makes it produce plastic deformation or separation, thereby obtains the required shape and size workpiece, which is called stamping. Stamping process can effectively improve the production efficiency of product, but it also has defects such as complex equipment structure, high cost.

[0003] With the development of science and technology and the progress of mechatronics technology, people have developed a new type of metal forming technology, namely hydraulic forming. Hydraulic forming technology has obvious technical and economic advantages in reducing weight, reducing the number of parts and molds, improving stiffness and strength, and reducing production cost, and has been rapidly developed and widely applied since its development. At present, most of the metal pipe parts forming in the world are carried out by this method, but the manufacturing precision of the parts by this method still needs to be improved, and it has low forming precision for some complex surface parts. Therefore, the prior art proposes some air inflation forming technologies, for example, the invention patent with the authorization announcement number CN 107052123 B discloses a kind of metal pipe class part hot metal air pressure forming method. The air pressure forming method makes high pressure gas act on the inner wall of hot metal pipe, forces the metal to produce plastic deformation, and can realize high-precision shape complex pipe class part forming, which has wide application in the fields of aerospace, automobile and mechanical manufacturing.

[0004] The above-mentioned air pressure forming method has the following disadvantages:

[0005] The upper die heating and heat preservation hearth and the lower die heating and heat preservation hearth are heated first, then the upper die cavity and the lower die cavity are heated through the upper die heating and heat preservation hearth and the lower die heating and heat preservation hearth, then the pipe fitting is heated through the electromagnetic induction heating device, and finally the pipe fitting is placed in the upper die cavity and the lower die cavity for air inflation forming. Not only is the operation cumbersome, but also the energy consumption is large, and after the mold is closed, heating cannot be performed again, real-time online heating of the pipe fitting is difficult to achieve, and the processing quality is difficult to guarantee. In addition, the electromagnetic induction heating device requires that the workpiece material itself has the property of electric conduction and heating. UTILITY MODEL CONTENTS

[0006] The utility model discloses a purpose at overcoming above -mentioned problem provides a kind of high temperature gas online heating air inflation forming device, this high temperature gas online heating air inflation forming device is heated to pipe fitting by high temperature gas online, not only simple operation, energy saving, and ensure heating effect.

[0007] The utility model discloses a purpose is realized by following technical scheme:

[0008] A kind of high temperature gas online heating air inflation forming device, including forming die and high temperature gas heating mechanism;

[0009] The forming die is equipped with die cavity and two hot gas passages respectively with die cavity intercommunication;

[0010] The high temperature gas heating mechanism includes gas heater and hot gas delivery pipeline, and the gas heater is communicated with hot gas passage by hot gas delivery pipeline.

[0011] In an preferred embodiment of the utility model, the forming die includes upper die and lower die, and the die cavity includes upper die cavity arranged in the upper die and lower die cavity arranged in the lower die;The upper die and lower die are both equipped with the hot gas passage.

[0012] The working principle of the above-mentioned high temperature gas online heating air inflation forming device is as follows:

[0013] When working, first, the pipe fitting to be processed is placed in the lower die cavity of the lower die, and then the upper die is closed;The air is heated by the gas heater, and the hot air is delivered to one of the hot gas passages through the hot gas delivery pipeline, and the hot air moves along the hot gas passage to the upper die cavity and the lower die cavity, and the pipe fitting in the upper die cavity and the lower die cavity is heated, and then the hot air is delivered out through the other hot gas passage, and the pipe fitting is heated by the continuous hot air, so that its temperature is raised to a specified value, and finally the high-pressure gas pipe fitting is inflated until the pipe fitting is formed.

[0014] In an preferred embodiment of the utility model, the gas heater is communicated with the inlet of the hot gas passage of the lower die through the hot gas delivery pipeline, and the outlet of the hot gas passage of the upper die is connected with the exhaust pipeline, for delivering the heated waste gas to a specified place for centralized treatment.

[0015] In an preferred embodiment of the utility model, the upper die cavity and the lower die cavity each include a die cavity middle part, a die cavity neck part and a die cavity end part, the die cavity neck part is communicated between the die cavity middle part and the die cavity end part, the die cavity neck part and the die cavity end part each have two sections, the die cavity middle part is located between the two die cavity neck parts, and the size of the die cavity middle part and the die cavity end part is greater than the size of the die cavity neck part.

[0016] Further, the hot gas channels each include a plurality of first channels and a plurality of second channels, one end of the second channels is communicated with the first channels, and the other end of the second channels is communicated with the middle part of the mold cavity and the end part of the mold cavity respectively. Through the above structure, the hot gas can be delivered into the middle part of the mold cavity and the end part of the mold cavity respectively, and the pipe is heated in the middle part of the mold cavity and the end part of the mold cavity respectively, so that the end part of the pipe is first stamped and formed and sealed, and then the high-pressure gas is input to the middle part of the pipe for hydroforming.

[0017] In one preferred embodiment of the present application, the sealing punch further comprises a high-pressure channel, and the high-pressure channel is connected with the high-pressure medium supply mechanism through a high-pressure pipeline.

[0018] Further, one end of the sealing punch extends into the mold cavity, and the other end of the sealing punch is connected with the driving end of the feeding driving mechanism, and the feeding driving mechanism drives the sealing punch to stamp and form and seal the end part of the pipe.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] 1. The high-temperature gas online heating air forming device of the present application can heat the pipe through high-temperature gas online, so that the pipe can be formed and processed at a specified temperature throughout the process, and the processing quality is guaranteed.

[0021] 2. The present application does not need to preheat the mold and the pipe separately, but directly puts the pipe into the mold cavity and then heats it, which simplifies the process flow, improves production efficiency, and saves energy consumption.

[0022] 3. The present application uses high-temperature gas to heat the workpiece, and does not require the material of the workpiece itself to have conductivity, so it can be used for processing of more types of materials. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 is a sectional view of the high-temperature gas online heating air forming device of the present application, and the arrows in the figure are the flow direction of the high-temperature gas.

[0024] Fig. 2 is a schematic view of the three-dimensional structure of the lower mold of the present application. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical scheme of the present application, the present application will be further described below in conjunction with the embodiments and the drawings, but the implementation of the present application is not limited to this.

[0026] Referring to Figs. 1-2The high-temperature gas online heating air inflation forming device of the embodiment comprises a forming die and a high-temperature gas heating mechanism; the forming die comprises an upper die 1 and a lower die 2, the upper die 1 is provided with an upper die cavity 1-1, and the lower die 2 is provided with a lower die cavity 2-1; the upper die 1 and the lower die 2 are both provided with a hot gas channel 3; the high-temperature gas heating mechanism comprises a gas heater 4 and a hot gas delivery pipeline 5, and the gas heater 4 is communicated with one of the hot gas channels 3 through the hot gas delivery pipeline 5.

[0027] Referring to Figs. 1-2 The gas heater 4 is communicated with the inlet of the hot gas channel 3 of the lower die 2 through the hot gas delivery pipeline 5, the outlet of the hot gas channel 3 of the upper die 1 is connected with an exhaust pipeline, and the heated exhaust gas is delivered to a designated place for centralized treatment.

[0028] Referring to Figs. 1-2 The upper die cavity 1-1 and the lower die cavity 2-1 both comprise a die cavity middle part 6, a die cavity neck part 7 and a die cavity end part 8, the die cavity neck part 7 is communicated between the die cavity middle part 6 and the die cavity end part 8, the die cavity neck part 7 and the die cavity end part 8 are both provided with two sections, the die cavity middle part 6 is located between the two sections of the die cavity neck part 7, and the sizes of the die cavity middle part 6 and the die cavity end part 8 are both greater than the size of the die cavity neck part 7.

[0029] Further, the hot gas channel 3 comprises a first channel 3-1 and two second channels 3-2, one end of the two second channels 3-2 is communicated with the first channel 3-1, and the other end of the two second channels 3-2 is respectively communicated with the die cavity middle part 6 and the die cavity end part 8. Through the above structure, the hot gas can be delivered into the die cavity middle part 6 and the die cavity end part 8 respectively, and the pipe fittings in the die cavity middle part 6 and the die cavity end part 8 are heated respectively, so as to stamp and form the end part of the pipe fitting and seal it first, and then input the high-pressure gas to perform hydroforming on the middle part of the pipe fitting.

[0030] Further, the sealing punch 9 is connected with the driving end of the feeding driving mechanism, and the feeding driving mechanism drives the sealing punch 9 to stamp and form the end part of the pipe fitting and seal it.

[0031] Further, the sealing punch 9 is connected with the driving end of the feeding driving mechanism, and the feeding driving mechanism drives the sealing punch 9 to stamp and form the end part of the pipe fitting and seal it.

[0032] Referring to Figs. 1-2 The working principle of the high-temperature gas online heating air inflation forming device of the embodiment is as follows:

[0033] In working, the pipe to be processed is placed into the lower die cavity 2-1 of the lower die 2, and then the upper die 1 is closed; the air is heated by the gas heater 4, and the high-temperature air is delivered into the hot air passage 3 of the lower die 2 through the hot air delivery pipeline 5, moves along the hot air passage 3 into the upper die cavity 1-1 and the lower die cavity 2-1, heats the pipe in the upper die cavity 1-1 and the lower die cavity 2-1, and is delivered out through the hot air passage 3 of the upper die 1, so that the pipe is heated by the continuous hot air and its temperature is raised to a specified value, and finally the high-pressure air is introduced into the pipe to expand the pressure until the pipe is formed.

[0034] The above is the preferred embodiment of the present application, but the embodiment of the present application is not limited by the above, and any change, modification, replacement, combination, simplification made without departing from the spirit and principle of the present application shall be an equivalent replacement mode, which is included in the protection scope of the present application.

Claims

1. A high temperature gas on-line heating air forming apparatus, characterized by, The molding die and the high-temperature gas heating mechanism are included. The molding die is internally provided with a mold cavity and a hot gas passage communicated with the mold cavity. The high-temperature gas heating mechanism includes a gas heater and a hot gas delivery pipeline, and the gas heater is communicated with the hot gas passage through the hot gas delivery pipeline.

2. The high temperature gas on-line heating blow molding apparatus according to claim 1, wherein The molding die includes an upper die and a lower die, and the mold cavity includes an upper mold cavity arranged in the upper die and a lower mold cavity arranged in the lower die.

3. The high temperature gas on-line heating blow molding apparatus according to claim 2, wherein The upper die and the lower die are both provided with the hot gas passage.

4. The high temperature gas on-line heating blow molding apparatus according to claim 1, wherein The gas heater is communicated with the inlet of the hot gas passage through the hot gas delivery pipeline, and the outlet of the hot gas passage is connected with an exhaust pipeline.

5. The high temperature gas on-line heating blow molding apparatus according to claim 1, wherein The hot gas passage includes a plurality of first passages and a plurality of second passages, one end of the second passage is communicated with the first passage, and the other end of the second passage is respectively communicated with the middle part and the end part of the corresponding mold cavity.

6. The high temperature gas on-line heating blow molding apparatus according to claim 5, wherein The sealing punch is further included, and the sealing punch is provided with a high-pressure passage connected with a high-pressure medium supply mechanism through a high-pressure pipeline. One end of the sealing punch extends into the mold cavity, and the other end of the sealing punch is connected with the driving end of the feeding driving mechanism.

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