Pipe part shaping and quenching device

Abstract

The utility model relates to the technical field of hot stamping of pipe products, in particular to a pipe part shaping and quenching device which comprises an upper die, a lower die, a quenching cooling mechanism, a lifting mechanism and a limiting mechanism, and the upper die and the lower die are used for shaping pipe parts; the quenching cooling mechanism comprises a containing groove, quenching liquid is contained in the containing groove, and the quenching liquid is used for quenching the pipe parts; one end of the lifting mechanism is connected with the outer bottom surface of the lower die of the die, and the other end of the lifting mechanism is connected with the inner bottom surface of the accommodating groove, so that the pipe parts are immersed in or moved out of the quenching liquid; the limiting mechanism is located between the outer bottom face of the lower die body and the inner bottom face of the containing groove and used for limiting the position, immersed in quenching liquid, of the lower die body. According to the device, automatic production and automatic shaping and quenching are achieved in the whole process, sequential production is not needed, production efficiency is improved, manual intervention is not needed, potential safety hazards are reduced, and production safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hot stamping of pipe products, in particular to a shaping and quenching device for pipe parts. Background Art

[0002] At present, there are many difficulties in the production of pipe parts in the hot forming industry. There are many differences between pipe parts and plate products. Plate products only expand slightly after heating, which will not affect subsequent production. However, after pipe parts are heated to complete austenitization at high temperature, stress is released, deformation is large, and deformation is irregular. After being placed in the mold, it is difficult to fit the mold completely, resulting in the inability of pipe parts to complete the quenching process during the pressure holding process, and the organization cannot be completely transformed into martensite, resulting in unqualified part performance.

[0003] Therefore, conventional hot stamping equipment and processes for sheet metal products cannot meet the production requirements of pipe parts. Most of the existing processes for producing pipe parts are manual. After heating, they are simply formed by a mold, and then heated again and manually placed in the quenching liquid. This production process is time-consuming, labor-intensive, slow, and has certain risks.

[0004] With the rapid development of technology in the automobile body industry, the production pace is getting faster and faster, and the types of products are increasing. In order to improve production efficiency, reduce production risks and ensure production safety, a shaping and quenching device for pipe parts is needed. Utility Model Content

[0005] In order to solve the above technical problems existing in the prior art, the utility model provides a shaping and quenching device for pipe parts.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] A device for shaping and quenching pipe parts comprises an upper die, a lower die, a quenching and cooling mechanism, a lifting mechanism and a limiting mechanism, wherein the upper die and the lower die are used for shaping pipe parts; the quenching and cooling mechanism comprises a containing tank, wherein the containing tank is filled with quenching liquid, and the quenching liquid is used for quenching pipe parts; one end of the lifting mechanism is connected to the outer bottom surface of the lower die, and the other end is connected to the inner bottom surface of the containing tank, so that the pipe parts can be immersed in or removed from the quenching liquid; the limiting mechanism is located between the outer bottom surface of the lower die and the inner bottom surface of the containing tank, and is used to limit the position of the lower die immersed in the quenching liquid.

[0008] The pipe parts shaping and quenching device provided by the utility model has full-process automatic production and automatic shaping and quenching, and does not need to be produced in sequence, so the production efficiency is improved, and no manual intervention is required, thereby reducing safety hazards and improving production safety.

[0009] On the basis of the above technical solution, the present invention can also make the following technical improvements:

[0010] Furthermore, a quenching liquid inlet and a quenching liquid outlet are provided on the side wall of the containing tank.

[0011] Furthermore, the quenching cooling mechanism also includes a plate heat exchanger, and both ends of the plate heat exchanger are respectively connected to the quenching liquid inlet and the quenching liquid outlet through pipelines, and a circulation pump, a temperature sensor and a flow sensor are arranged on the pipeline.

[0012] The beneficial effects of adopting the above-mentioned further technical solution are: the plate heat exchanger is used to cool the quenching liquid and control the temperature of the quenching liquid within the process range required for quenching, and the circulating pump realizes the reuse of the cooled quenching liquid; the temperature sensor is used to monitor the temperature of the quenching liquid in real time, and the flow sensor is used to monitor the flow of the quenching liquid in real time.

[0013] Furthermore, the quenching cooling mechanism also includes a water chiller, which is connected to the plate heat exchanger through a cooling water pipeline, and a cooling water regulating valve is provided on the cooling water pipeline.

[0014] The beneficial effect of adopting the above-mentioned further technical solution is that the chiller adopts compressor refrigeration to heat the cooling water into cold water, and can drive the cooling water circulation, so that the cooling water is transported to the plate heat exchanger through the cooling water pipeline for heat exchange and cooling of the quenching liquid; the cooling water regulating valve is used to adjust the cooling water flow rate so that the quenching liquid temperature is maintained within the range required by the process production.

[0015] Furthermore, the quenching cooling mechanism also includes a control system, and the control system is electrically connected to the circulation pump, the temperature sensor, the flow sensor, the chiller, and the cooling water regulating valve.

[0016] The beneficial effect of adopting the above further technical solution is that the control system realizes the control of the quenching cooling mechanism.

[0017] Furthermore, valves are provided at the quenching liquid inlet and the quenching liquid outlet.

[0018] The beneficial effect of adopting the above further technical solution is: controlling the inflow and outflow of the quenching liquid.

[0019] Furthermore, the lifting mechanism is a nitrogen cylinder, the limiting mechanism is a limiting block, and the limiting block is fixedly connected to the inner bottom surface of the containing groove.

[0020] The beneficial effect of adopting the above further technical solution is that the nitrogen cylinder is used for the lower die movement of the mold to ensure that the pipe parts enter the quenching liquid after pressure maintenance and shaping in the mold; the limit block ensures the lower limit of the movement range of the lower die of the mold to ensure that the nitrogen cylinder will not be crushed.

[0021] Furthermore, along the vertical direction, the nitrogen cylinder has a lowest position and a highest position. At the lowest position, the height of the nitrogen cylinder is h1, and at the highest position, the height of the nitrogen cylinder is h2. The height of the limit block is h, and h1<h<h2.

[0022] The beneficial effect of adopting the above further technical solution is that: the height of the limit block is limited so that the pipe parts can be fully immersed in the quenching liquid, and at the same time, it is ensured that the lower mold of the mold will not crush the nitrogen cylinder.

[0023] Furthermore, an upper mold insert is provided on the upper mold of the mold, and a lower mold insert is provided on the lower mold of the mold, and the lower mold insert is inclined along the extension direction of the tube part.

[0024] Furthermore, the angle between the lower mold insert of the mold and the horizontal direction is 5-20 degrees.

[0025] The beneficial effect of adopting the above-mentioned further technical solution is that the lower die insert of the mold is arranged at an angle, which facilitates the outflow of quenching liquid in the pipe parts after quenching is completed. The inclination direction of the lower die insert of the mold corresponds to the upper die insert of the mold, ensuring that the upper die insert of the mold and the lower die insert of the mold are fitted together for pressure maintaining and shaping of the parts.

[0026] Compared with the prior art, the utility model has the following technical effects:

[0027] The shaping and quenching device for pipe parts does not require manual intervention, and the production is stable. The shaping and quenching can be completed in one production cycle, and there is no need for sequential production. The forming is done first, and then the quenching is done, which improves the production efficiency.

[0028] The original production process requires manual intervention, high temperature is very harmful to the human body, and there are safety hazards. This device eliminates such hidden dangers and can ensure safe production;

[0029] This device is fully automatic in production, automatic shaping and quenching, and has a high degree of automation;

[0030] The device has strong compatibility and a wide range of applications. It is suitable for stamping production lines of tube parts in all hot forming industries, allowing high-strength tube parts to be mass-produced. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a partial structural schematic diagram of a shaping and quenching device for pipe parts according to an embodiment of the utility model;

[0032] Figure 2 Schematic diagram of the quenching cooling mechanism.

[0033] Reference numerals:

[0034] 1. Upper mold; 2. Upper mold insert; 3. Lower mold insert; 4. Lower mold; 5. Quenching liquid outlet pipeline; 6. Quenching liquid outlet valve; 7. Quenching liquid; 8. Receiving tank; 9. Lifting mechanism; 10. Limiting mechanism; 11. Quenching liquid inlet pipeline; 12. Quenching liquid inlet valve; 13. Pipe parts; 14. Chiller; 15. Control system; 16. Circulation pump; 17. Temperature sensor; 18. Flow sensor; 19. Cooling water regulating valve; 20. Plate heat exchanger; 21. Quenching liquid outlet; 22. Quenching liquid inlet. DETAILED DESCRIPTION

[0035] The following is an explanation of the implementation of the present invention by specific specific embodiments. Those skilled in the art can easily understand other advantages and functions of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0036] See also Figure 1-2 The utility model provides a shaping and quenching device for pipe parts, comprising an upper die 1, a lower die 4, a quenching and cooling mechanism, a lifting mechanism 9 and a limiting mechanism 10, wherein the upper die 1 and the lower die 4 are used for shaping pipe parts 13, and the upper die 1 is installed on a press device; the quenching and cooling mechanism comprises a receiving groove 8, wherein the receiving groove 8 is filled with a quenching liquid 7, and the quenching liquid 7 is used for quenching pipe parts 13; one end of the lifting mechanism 9 is connected to the outer bottom surface of the lower die 4, and the other end is connected to the inner bottom surface of the receiving groove 8, so that the pipe parts 13 are immersed in or removed from the quenching liquid 7; the limiting mechanism 10 is located between the outer bottom surface of the lower die 4 and the inner bottom surface of the receiving groove 8, and is used to limit the position of the lower die 4 immersed in the quenching liquid 7.

[0037] The process of shaping and quenching the pipe parts by using the shaping and quenching device is as follows: the fully austenitized pipe parts 13 are grabbed into the mold of the shaping and quenching device by a robot or a loading mechanical arm, and the press drives the upper mold 1 of the mold downward, and the upper and lower mold inserts fit together to achieve shaping of the pipe parts 13. In this process, the forming force of the press is less than the force of the lifting mechanism 9 or the forces of the two are equal, so as to ensure that the pipe parts 13 are shaped above the quenching liquid 7; after shaping, the press increases the pressure, and the lifting mechanism 9 drives the lower mold 4 of the mold to move downward, so that all the inserts of the lower mold and part of the inserts of the upper mold enter the quenching liquid 7, at this time, it can be ensured that the pipe parts 13 are completely immersed in the quenching liquid 7 for quenching, and the austenite can be completely converted into martensite; after quenching, the press drives the upper mold 1 of the mold to return, and the pipe parts 13 are taken out, and at the same time, the lower mold 4 of the mold slowly returns to the initial position under the action of the lifting mechanism 9, waiting for the next feeding production.

[0038] A quenching liquid inlet 22 and a quenching liquid outlet 21 for the quenching liquid 7 to enter and exit are provided on the side wall of the receiving tank 8. The quenching liquid inlet 22 is provided with a quenching liquid inlet pipeline 11 communicating with the inside and outside of the receiving tank 8. The quenching liquid outlet 21 is provided with a quenching liquid outlet pipeline 5 communicating with the inside and outside of the receiving tank 8. The quenching cooling mechanism also includes a plate heat exchanger 20. The quenching liquid inlet pipeline 11 and the quenching liquid outlet pipeline 5 are connected to the plate heat exchanger 20 through a pipeline. Cooling water passes through the plate heat exchanger 20. The cooling water and the quenching liquid 7 exchange heat in the plate heat exchanger 20 to achieve cooling of the quenching liquid 7, so that the temperature of the quenching liquid 7 is controlled within the process range.

[0039] The heat exchange pipe of the plate heat exchanger 20 is a copper pipe, which has good heat dissipation and ensures heat exchange;

[0040] The pipeline is provided with a circulation pump 16 , a temperature sensor 17 and a flow sensor 18 . The circulation pump 16 realizes the circulation of the quenching liquid 7 . The temperature sensor 17 monitors the temperature of the quenching liquid 7 in real time. The flow sensor 18 monitors the flow of the quenching liquid 7 in real time.

[0041] The quenching cooling mechanism also includes a chiller 14, which is connected to the plate heat exchanger 20 through a cooling water pipeline. A cooling water regulating valve 19 is provided on the cooling water pipeline. The chiller 14 uses a compressor for refrigeration to warm water into cold water and can drive the cooling water circulation. The parameter temperature of the circulating water is determined according to the process parameters of the quenching liquid. The cooling water regulating valve 19 is used to adjust the flow rate of the cooling water so that the temperature of the quenching liquid is maintained within the range required for the process production.

[0042] The quenching cooling mechanism also includes a control system 15, which is electrically connected to a circulating pump 16, a temperature sensor 17, a flow sensor 18, a chiller 14, and a cooling water regulating valve 19 to control the quenching cooling mechanism; the control system 15 collects temperature and flow signals of the quenching liquid 7, controls the flow of cooling water according to real-time data, thereby adjusting the process temperature of the quenching liquid 7.

[0043] The quenching liquid inlet pipeline 11 is provided with a quenching liquid inlet valve 12 , and the quenching liquid outlet pipeline 5 is provided with a quenching liquid outlet valve 6 to control the inflow and outflow of the quenching liquid 7 .

[0044] The lifting mechanism 9 is a nitrogen cylinder, and the limiting mechanism 10 is a limiting block. The limiting block is fixedly connected to the inner bottom surface of the containing groove 8. The nitrogen cylinder drives the lower mold 4 to move, ensuring that the pipe parts 13 are immersed in the quenching liquid 7 after pressure maintenance and shaping in the mold. After quenching is completed, the lower mold 4 slowly returns to the initial position under the action of the nitrogen cylinder, waiting for the next loading production.

[0045] The lifting mechanism 9 is preferably a nitrogen cylinder with a delay mechanism, which is externally controlled to slowly return to the initial position. An ordinary nitrogen cylinder can also be used, and the compressor is decompressed and slowly returns to the initial position to ensure that the pipe parts 13 will not be bounced or the quenching liquid 7 will be splashed during the nitrogen cylinder returning to the initial position.

[0046] In the vertical direction, the nitrogen cylinder has a lowest position and a highest position. At the lowest position, the height of the nitrogen cylinder is h1, and at the highest position, the height of the nitrogen cylinder is h2. The height of the limit block is h, and h1<h<h2, which limits the minimum distance and maximum distance of the movement of the lower die 4 of the mold, ensuring that the pipe parts can be fully immersed in the quenching liquid 7, while preventing the lower die 4 of the mold from crushing the nitrogen cylinder.

[0047] The upper mold 1 is provided with an upper mold insert 2, and the lower mold 4 is provided with a lower mold insert 3. The upper mold insert 2 and the lower mold insert 3 are used for shaping the pipe parts 13, and can be applicable to pipe products with various cross-sectional shapes. The lower mold insert 3 and / or the upper mold insert 2 are tilted along the extension direction of the pipe parts 13, and the angle between them and the horizontal direction is 5-20 degrees, which is convenient for the outflow of the quenching liquid 7 inside the pipe parts 13 after quenching is completed, and also ensures that the pipe parts 13 are fixed and cannot slide. The tilt directions of the lower mold insert 3 and the upper mold insert 2 correspond to each other, ensuring that the two can be fitted together for pressure-maintaining shaping of the pipe parts 13.

[0048] In the tubular parts shaping and quenching device, the upper mold 1 and the upper mold insert 2 have high temperature resistance, and the lower mold 4 and the lower mold insert 3 have high temperature resistance and corrosion resistance. Before and during the shaping of the tubular parts 13, only part of the structure of the lower mold 4 and the lower mold insert 3 is located in the quenching liquid 7 to ensure that the tubular parts 13 do not enter the quenching liquid 7 before the quenching process, while shortening the formation of the nitrogen cylinder. During the quenching process, the entire structure of the lower mold insert 3 should be immersed in the quenching liquid 7 to ensure that the tubular parts 13 are completely immersed in the quenching liquid. Therefore, the lower mold 4 and the lower mold insert 3 have high temperature resistance and corrosion resistance; the quenching liquid outlet pipeline 5 and the quenching liquid inlet pipeline 11 are made of metal materials and have corrosion resistance; the limiting mechanism 10 has corrosion resistance.

[0049] The control system 15 is externally connected to an alarm. When the temperature of the quenching liquid 7 is unqualified, the alarm emits a buzzer signal to prompt on-site personnel to handle it in time. The control system 15 is used in conjunction with an industrial computer or a touch screen to make various equipment parameters more intuitive.

[0050] The shaping and quenching device for pipe parts has the following effects:

[0051] (1) All the mechanisms in contact with the tubular parts of the device are made of high-temperature resistant materials or have high-temperature resistant properties, and can work stably for a long time under high temperature conditions;

[0052] (2) All the mechanisms in the device that come into contact with the quenching liquid are made of corrosion-resistant materials and can work stably for a long time in corrosive media;

[0053] (3) The device has high efficiency, fast cycle, no need for manual intervention, stable production, and the whole forming and quenching can be completed in one production cycle. There is no need for sequential production. Forming first and quenching later, which improves production efficiency;

[0054] (4) The device can well ensure safe production. The original production process requires manual intervention, high temperature is very harmful to the human body, and there are safety hazards. The device eliminates such hazards;

[0055] (5) The device is fully automatic in production and automatic shaping and quenching;

[0056] (6) The device has strong compatibility and a wide range of applications, and is suitable for stamping production lines in the hot forming industry for all tube parts.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A shaping and quenching device for pipe parts, characterized in that: It includes an upper mold, a lower mold, a quenching and cooling mechanism, a lifting mechanism and a limiting mechanism. The upper mold and the lower mold are used for shaping pipe parts; the quenching and cooling mechanism includes a receiving tank, and the receiving tank is filled with quenching liquid, and the quenching liquid is used for quenching pipe parts; one end of the lifting mechanism is connected to the outer bottom surface of the lower mold, and the other end is connected to the inner bottom surface of the receiving tank, so that the pipe parts can be immersed in or removed from the quenching liquid; the limiting mechanism is located between the outer bottom surface of the lower mold and the inner bottom surface of the receiving tank, and is used to limit the position of the lower mold immersed in the quenching liquid.

2. The shaping and quenching device for pipe parts according to claim 1 is characterized in that: The side wall of the containing tank is provided with a quenching liquid inlet and a quenching liquid outlet.

3. The shaping and quenching device for pipe parts according to claim 2 is characterized in that: The quenching and cooling mechanism further comprises a plate heat exchanger, both ends of which are respectively connected to the quenching liquid inlet and the quenching liquid outlet through pipelines, and a circulation pump, a temperature sensor and a flow sensor are arranged on the pipelines.

4. The shaping and quenching device for pipe parts according to claim 3 is characterized in that: The quenching cooling mechanism also includes a water chiller, which is connected to the plate heat exchanger through a cooling water pipeline, and a cooling water regulating valve is arranged on the cooling water pipeline.

5. The shaping and quenching device for pipe parts according to claim 4 is characterized in that: The quenching cooling mechanism also includes a control system, and the control system is electrically connected to a circulation pump, a temperature sensor, a flow sensor, a chiller, and a cooling water regulating valve.

6. The shaping and quenching device for pipe parts according to claim 2 is characterized in that: Valves are provided at the quenching liquid inlet and the quenching liquid outlet.

7. The shaping and quenching device for pipe parts according to claim 1 is characterized in that: The lifting mechanism is a nitrogen cylinder, the limiting mechanism is a limiting block, and the limiting block is fixedly connected to the inner bottom surface of the containing groove.

8. The shaping and quenching device for pipe parts according to claim 7 is characterized in that: In the vertical direction, the nitrogen cylinder has a lowest position and a highest position. At the lowest position, the height of the nitrogen cylinder is h1, and at the highest position, the height of the nitrogen cylinder is h2. The height of the limit block is h, and h1<h<h2.

9. The shaping and quenching device for pipe parts according to claim 1 is characterized in that: The upper mold is provided with an upper mold insert, and the lower mold is provided with a lower mold insert. The lower mold insert and / or the upper mold insert are arranged obliquely along the extension direction of the pipe part.

10. The shaping and quenching device for pipe parts according to claim 9, characterized in that: The angle between the mold lower mold insert and / or the mold lower mold insert and the horizontal direction is 5-20 degrees.

Images