Stretching forming die for combustion chamber

Abstract

The invention discloses a stretch forming die for a combustion chamber, and belongs to the technical field of die manufacturing, the stretch forming die comprises a frame, a movable die and a fixed die are arranged on the frame, the movable die is a male die, and the fixed die is a female die; a hydraulic rod and a telescopic rod are arranged on the frame, the hydraulic rod is used for pushing the movable mold to move downwards, the output end of the telescopic rod is fixedly connected with the movable mold, the telescopic rod is a spring telescopic rod, when the movable mold is not subjected to pressure, the telescopic rod is in a contracted state, and a mold cavity is formed in the fixed mold; a detection mechanism for detecting the state of a lubricating film on the surface of the blank is arranged on the frame; in the stretching process, when a lubricating film on the surface of a blank is broken, the detection mechanism prompts a worker to separate the left die from the right die, meanwhile, supporting force is provided for the semi-finished workpiece through the supporting rod, and therefore the worker can conveniently smear lubricating oil on the surface of the semi-finished workpiece again, the lubricating film is restored, and the tearing probability of the workpiece in the stretching process is reduced; therefore, the defective rate is reduced, and the effect of improving the working efficiency is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of mold manufacturing, and more specifically to a stretching molding mold for a combustion chamber. Background Art

[0002] The combustion chamber is an important component of the engine, and its performance directly affects the efficiency and emissions of the engine; the existing combustion chamber manufacturing methods mainly include die casting, forging and hot forming, etc. These methods have disadvantages such as complex process, high cost and low production efficiency; stretch forming is a relatively new manufacturing technology in recent years, because of its advantages such as simple process, high forming precision and the ability to prepare complex shapes, it has received more and more attention.

[0003] During the stretching process, the blank is shaped by a stretching die. There is a large friction between the die and the blank. In order to reduce friction and heat, a lubricant or film is usually used to form a lubricating film on the surface of the blank.

[0004] However, during the stretching process, there is extrusion between the die and the blank. Due to the force applied in the stretching direction, the lubricant will be squeezed out from the gap between the die and the blank, and the film will be torn, eventually resulting in an uneven lubricating film or even complete disappearance. Such a situation will cause a significant increase in the friction coefficient, thereby accelerating the wear of the die and the blank, increasing energy consumption, and even causing unqualified wear of the product size, which not only affects the appearance quality of the product, but may also cause problems in subsequent processing or use of the product.

[0005] To this end, a drawing forming die for a combustion chamber is proposed. Summary of the invention

[0006] In view of the problems existing in the prior art, the object of the present invention is to provide a stretching forming die for a combustion chamber, which can lubricate the blank and the die during the stretching process to reduce friction.

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] A stretching forming die for a combustion chamber comprises a frame, a movable die and a fixed die are arranged on the frame, wherein the movable die is a male die and the fixed die is a female die; a hydraulic rod and a telescopic rod are arranged on the frame, the hydraulic rod is used to push the movable die downward, the output end of the telescopic rod is fixedly connected to the movable die, the telescopic rod is a spring telescopic rod, when the movable die is not subjected to pressure, the telescopic rod is in a contracted state, a die cavity is opened on the fixed die, pressure is applied to the blank placed on the surface of the female die by the male die, so that the ingredients enter the die cavity on the female die and are pushed and formed, which is a prior art and will not be described in detail; The frame is provided with a detection mechanism for detecting the state of the lubricating film on the surface of the blank; The fixed mold includes a left mold and a right mold, a bidirectional threaded rod is rotatably mounted on the frame, a servo motor for driving the bidirectional threaded rod to rotate is provided on the frame, and the output end of the servo motor is fixedly connected to the rotating shaft of the bidirectional threaded rod, so that the bidirectional threaded rod can be controlled by the servo motor to rotate a specified angle, wherein the servo motor rotating the specified angle is a prior art and will not be described in detail; two sliders are threadedly mounted on the bidirectional threaded rod, the left mold and the right mold are fixedly connected to the corresponding sliders respectively, and the right side wall of the left mold and the side wall of the right mold are attached together to form a complete fixed mold; and a clamping mechanism for fixing the product is provided on the movable mold; A sleeve is vertically fixed on the frame, a support rod is vertically slidably inserted on the top wall of the sleeve, an elastic part is installed between the support rod and the inner bottom wall of the sleeve, a through hole cooperating with the support rod is opened on the bottom wall of the mold cavity, the through hole is a circular hole, and the through hole is divided into two semicircles, the two semicircles are respectively located on the bottom walls of the left mold and the right mold, and a pressurizing mechanism for increasing the supporting force of the support rod is provided on the frame.

[0009] During the working process, the blank is first placed on the top wall of the fixed mold. Under the action of the through hole and the elastic part, the top wall of the support rod and the top wall of the fixed mold are in the same plane. When the movable mold moves down and the workpiece is stretched, the top wall of the support rod is always in contact with the bottom wall of the semi-finished workpiece, and the elastic part is gradually squeezed. In this process, the pressure of the support rod on the semi-finished workpiece increases; at the same time, the support rod retracts into the sleeve to occupy the internal space of the sleeve, increasing the air pressure in the sleeve, thereby increasing the temperature in the sleeve. At this time, the heat is transferred to the workpiece in contact with the support rod through heat exchange, so that the semi-finished workpiece is in a warm state, thereby increasing the plasticity of the blank and facilitating stretching.

[0010] During the stretching process, the resistance of the movable mold is detected by the detection mechanism. When the resistance of the movable mold increases, the staff starts the servo motor, and the servo motor drives the bidirectional threaded rod to rotate. At this time, the two sliders move away from each other, driving the left mold and the right mold to separate. At this time, with the cooperation of the support rod and the clamping mechanism, the workpiece can be prevented from shaking during the separation of the left mold and the right mold. Then the staff can apply lubricating oil again on the bottom wall of the semi-finished workpiece formed by stretching to facilitate continued stretching, reduce the defective rate, and save costs.

[0011] The cooperation of the support rod and the clamping mechanism can prevent the semi-finished workpiece from shaking during the application of lubricating oil. Therefore, there is no need to adjust the position of the semi-finished workpiece again during the closing process of the left mold and the right mold, which plays a role in improving work efficiency.

[0012] Furthermore, the clamping mechanism includes a first mounting groove provided on the side wall of the movable mold, a push rod made of a magnetic material is slidably inserted in the first mounting groove, and a spring is installed between the push rod and the end surface of the socket; A first magnet which repels the ejector rod is embedded on the fixed mold, and the first magnet is embedded on the left mold.

[0013] During the downward movement of the movable mold, the ejector rod gradually approaches the left mold. At this time, when the bottom wall of the movable mold and the top wall of the fixed mold are in the same plane, the repulsive force between the first magnet and the ejector rod is greater than the elastic force of the spring, so the ejector rod retracts into the first mounting groove, and the spring is in a compressed state. During the working process, when it is necessary to apply lubricating oil to the left mold and the right mold separately, the left mold drives the first magnet away from the push rod. At this time, the spring pushes the push rod, so that the push rod applies pressure to the semi-finished workpiece mounted on the movable mold, thereby preventing the workpiece from falling. When the lubricating oil is applied and the left mold and the right mold are closed again, the semi-finished workpiece can be located in the initial position for easy processing.

[0014] Furthermore, a second mounting groove is provided on the top wall of the support rod, and a suction cup with an opening facing upward is fixedly installed in the second mounting groove, and the ratio of the diameter of the second mounting groove to the maximum diameter of the suction cup is 1.2-1.3, and the spacing between the top wall of the suction cup and the top wall of the support rod is 2-4 mm, so when the blank is placed on the surface of the fixed mold, the suction cup is subjected to pressure and deformed, and the suction cup sinks into the second mounting groove, at which time the suction cup can be tightly adsorbed on the bottom wall of the semi-finished workpiece, so that the blank can be prevented from shaking at the moment when the movable mold contacts the blank, and then the blank is always located at the specified position during the stretching process to prevent the blank from shifting, and for the blank with uneven thickness, it plays a role in preventing it from being torn due to uneven force during the stretching process; When the left mold and the right mold are separated, the suction cup can also fix the semi-finished workpiece, thereby improving stability during the process of applying lubricating oil. There is no need to subsequently adjust the position of the semi-finished workpiece, which improves work efficiency.

[0015] Furthermore, the pressurizing mechanism comprises an elastic sleeve sleeved on the bidirectional threaded rod, and the two ends of the elastic sleeve are respectively fixedly connected to the frame and the slider, a cavity is formed on the elastic sleeve, and a conduit extending into the sleeve is inserted on the side wall of the cavity; when the two sliders move away from each other, the elastic sleeve can be squeezed, and when the two sliders move toward each other, the elastic sleeve can be stretched; that is, the cavity can be stretched or squeezed during the movement of the slider; When the cavity is stretched, the cavity absorbs air from the sleeve through the catheter. At this time, the sleeve is in a negative pressure state, so the support rod retracts into the sleeve; when the cavity is squeezed, the gas in the cavity is discharged into the sleeve through the catheter. At this time, the air pressure in the sleeve increases, and the support rod extends from the sleeve and gradually moves upward and passes through the through hole; thereby driving the support rod to move upward.

[0016] Since the thrust provided by the air pressure provided by the cavity on the support rod is less than the pressure of the hydraulic rod, when the support rod moves up to the maximum, the support rod will not be able to move. At this time, the slider continues to squeeze the elastic sleeve, so the air pressure in the sleeve gradually increases. At this time, the gas temperature in the sleeve rises, and then the heat can be transferred to the blank through heat exchange, which facilitates subsequent stretching and improves work efficiency.

[0017] Furthermore, a slide groove is vertically opened on the side wall of the frame close to the fixed mold, and a magnetic card plate is slidably installed in the slide groove. A card groove is vertically opened on the side wall of the card plate, and the card groove runs through the top wall and the bottom wall of the card plate.

[0018] Furthermore, a second electromagnet is fixedly mounted on the bottom wall of the slide slot, the second electromagnet is connected in parallel with the servo motor, and the clamping plate and the second electromagnet repel each other.

[0019] During normal operation, the left mold and the right mold are in a mold closing state. At this time, the side walls of the two sliders are also fitted together, and under the action of gravity, the card plate falls onto the surface of the second electromagnet. At this time, the two sliders are both in the card slot, so the left mold and the right mold can fit tightly together, which ensures that the stretching mold can work normally. When it is necessary to separate the left mold and the right mold and apply lubricating oil, the servo motor is powered on, and the servo motor is controlled by the program to delay 2-3 seconds after power-on before starting to work. At the moment the servo motor is powered on, the second electromagnet is also powered on. At this time, a magnetic field that repel each other with the card plate is generated around the second electromagnet, so the card plate moves up. When the card plate is out of contact with the slider, the servo motor starts to work. After the lubricating oil is applied, the servo motor drives the two sliders closer to each other. After the left mold and the right mold are closed, the servo motor is powered off. At this time, the second electromagnet is also powered off, so the clamping plate falls down, so that the two sliders can be fixed together again, facilitating the normal subsequent stretching process.

[0020] The servo motor can be controlled by a program to delay a period of time before starting to work after being powered on. This is a prior art and will not be described in detail.

[0021] Furthermore, an exhaust valve and a one-way valve are embedded on the side wall of the sleeve, the output end of the exhaust valve is connected to the sleeve, and the input end of the exhaust valve is connected to the conduit; The one-way valve and the exhaust valve are respectively located at the top and the bottom of the side wall of the sleeve, and the output end of the one-way valve is communicated with the conduit.

[0022] During the stretching process, the support rod can move to the surface of the one-way valve in an instant, thereby sealing the one-way valve; therefore, during the venting of the cavity, the gas only flows into the sleeve through the exhaust valve; even after the subsequent addition of lubricating oil, the sleeve can still be in a high temperature and high pressure state, thereby improving the heating effect of the semi-finished workpiece.

[0023] After completing one processing, the telescopic rod moves upward. When the telescopic rod moves upward to the maximum, the telescopic rod is out of contact with the one-way valve. At this time, the gas in the sleeve flows back to the cavity through the one-way valve and the catheter, preparing for working again.

[0024] Furthermore, a cavity is provided on the elastic member, and holes are evenly provided on the side walls of the cavity. Therefore, during the extrusion of the elastic member, the holes exhaust air outward, thereby driving the hot air in the sleeve to flow, thereby increasing the probability of the hot air in the sleeve contacting the support rod, improving the heating effect on the workpiece in the stretched state, increasing the plasticity of the blank, and reducing the probability of being torn during the stretching process.

[0025] Furthermore, the detection mechanism includes a storage module, a comparison module and an alarm module arranged on the frame, and the storage module stores the standard thrust value received by the movable mold during the stretching process, that is, the resistance value received by the movable mold when the surface of the blank is always evenly covered with a lubricating film during the entire stretching process; The movable mold is provided with a pressure detection module, which is a pressure sensor, and the pressure sensor is installed on the top wall of the movable mold. The output end of the hydraulic rod applies pressure to the pressure sensor, and then the pressure is transmitted to the movable mold, thereby driving the movable mold to move downward, and the magnitude of the thrust exerted on the movable mold can be detected by the pressure sensor; therefore, whether the resistance exerted on the movable mold changes can be detected by the pressure sensor; the pressure detection module sends the detected data to the comparison module.

[0026] Furthermore, the comparison module retrieves data from the storage module, processes the received data, and sends the processing results to the alarm module; the standard data is compared with the data obtained by the pressure detection module, so as to understand whether the lubricating film on the surface of the blank is uniform during the stretching process; when hour; The surface of the blank is evenly covered with a lubricating film and can be stretched normally; when hour; The comparison module sends the comparison result to the alarm module, indicating that the lubricating film on the surface of the blank is damaged, and there is a risk of tearing the blank; Wherein, F0 is the thrust required for the movable mold to move downward when the surface of the blank is evenly covered with a lubricating film, which is a preset value stored in the storage module; F is the actual thrust detected by the pressure detection module during the downward movement of the movable mold; Therefore, it can remind the staff to apply the lubricating film on the surface of the blank again, which saves costs and reduces the defective rate.

[0027] Compared with the prior art, the present invention has the following beneficial effects: (1) This scheme is provided with a left die, a right die and a detection mechanism. During the stretching process, when the lubricating film on the surface of the blank is broken, the detection mechanism prompts the staff to separate the left die from the right die. At the same time, the support rod provides support force to the semi-finished workpiece, so that it is convenient for the staff to apply lubricating oil to the surface of the semi-finished workpiece again to restore the lubricating film, thereby reducing the probability of tearing of the workpiece during the stretching process, that is, reducing the defective rate and playing a role in improving work efficiency. (2) This scheme is provided with a suction cup, an elastic sleeve and a conduit; when the left mold and the right mold move away from each other, the gas in the cavity flows into the sleeve through the conduit, and the air pressure in the sleeve gradually increases. At this time, the temperature of the gas in the sleeve rises, and then the heat can be transferred to the blank through heat exchange, thereby facilitating subsequent stretching and improving work efficiency.

[0028] (3) This scheme provides an exhaust valve and a one-way valve. During the stretching process, the support rod can move to the surface of the one-way valve in an instant when it moves downward, thereby sealing the one-way valve. Therefore, during the exhaust of the cavity, the gas only flows into the sleeve through the exhaust valve. Even after the lubricating oil is added later, the sleeve can still be in a high temperature and high pressure state, thereby improving the heating effect of the semi-finished workpiece. After completing one processing, the telescopic rod moves upward. When the telescopic rod moves upward to the maximum, the telescopic rod is out of contact with the one-way valve. At this time, the gas in the sleeve flows back to the cavity through the one-way valve and the conduit. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of a first three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of a second three-dimensional structure of the present invention; Figure 3 is a schematic diagram of a third three-dimensional structure of the present invention; Figure 4 It is a schematic diagram of the combined structure of the left mold, the right mold and the bidirectional threaded rod of the present invention; Figure 5 It is a schematic diagram of the combined cross-sectional structure of the elastic sleeve and the sleeve of the present invention; Figure 6 It is a schematic cross-sectional structural diagram of the movable mold of the present invention; Figure 7 This is a working flow chart of the storage module, comparison module, alarm module and pressure detection module of the present invention.

[0030] Description of the numbers in the figure: 1. Frame; 2. Moving mold; 3. Fixed mold; 301. Left mold; 302. Right mold; 4. Hydraulic rod; 5. Telescopic rod; 6. Bidirectional threaded rod; 7. Servo motor; 8. Slider; 9. Sleeve; 10. Support rod; 11. Elastic member; 12. Push rod; 13. Spring; 14. First magnet; 15. Suction cup; 16. Elastic sleeve; 17. Cavity; 18. Conduit; 19. Card plate; 20. Card slot; 21. Second electromagnet; 22. Exhaust valve; 23. One-way valve; 24. Cavity; 25. Storage module; 26. Comparison module; 27. Alarm module; 28. Pressure detection module. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention. Embodiment 1:

[0032] See also Figures 1 to 7 A stretching forming die for a combustion chamber comprises a frame 1, on which a movable die 2 and a fixed die 3 are arranged, wherein the movable die 2 is a male die and the fixed die 3 is a female die; a hydraulic rod 4 and a telescopic rod 5 are arranged on the frame 1, wherein the hydraulic rod 4 is used to push the movable die 2 downward, wherein the output end of the telescopic rod 5 is fixedly connected to the movable die 2, wherein the telescopic rod 5 is a spring 13 telescopic rod 5, wherein when the movable die 2 is not subjected to pressure, the telescopic rod 5 is in a contracted state, and a die cavity is provided on the fixed die 3, wherein pressure is applied to the blank placed on the surface of the female die by the male die, so that the ingredients enter the die cavity on the female die and are pushed and formed, which is a prior art and will not be described in detail; The frame 1 is provided with a detection mechanism for detecting the state of the lubricating film on the surface of the blank; The fixed mold 3 includes a left mold 301 and a right mold 302. A bidirectional threaded rod 6 is rotatably mounted on the frame 1. A servo motor 7 for driving the bidirectional threaded rod 6 to rotate is provided on the frame 1. The output end of the servo motor 7 is fixedly connected to the rotating shaft of the bidirectional threaded rod 6. Therefore, the bidirectional threaded rod 6 can be controlled to rotate by a specified angle by the servo motor 7. The rotation of the servo motor 7 by a specified angle is a prior art and will not be described in detail. Two sliders 8 are threadedly mounted on the bidirectional threaded rod 6. The left mold 301 and the right mold 302 are fixedly connected to the corresponding sliders 8 respectively. The right side wall of the left mold 301 and the side wall of the right mold 302 are fitted together to form a complete fixed mold 3. A clamping mechanism for fixing the product is provided on the movable mold 2. A sleeve 9 is vertically fixedly installed on the frame 1, and a support rod 10 is vertically slidably inserted on the top wall of the sleeve 9. An elastic member 11 is installed between the support rod 10 and the inner bottom wall of the sleeve 9. A through hole cooperating with the support rod 10 is opened on the bottom wall of the mold cavity. The through hole is a circular hole, and the through hole is divided into two semicircles. The two semicircles are respectively located on the bottom walls of the left mold 301 and the right mold 302, and a pressurizing mechanism for increasing the supporting force of the support rod 10 is provided on the frame 1.

[0033] During the working process, the blank is first placed on the top wall of the fixed mold 3. Under the action of the through hole and the elastic member 11, the top wall of the support rod 10 is in the same plane as the top wall of the fixed mold 3. When the movable mold 2 moves down and the workpiece is stretched, the top wall of the support rod 10 is always in contact with the bottom wall of the semi-finished workpiece, and the elastic member 11 is gradually squeezed. During this process, the pressure of the support rod 10 on the semi-finished workpiece increases; at the same time, the support rod 10 retracts into the sleeve 9 to occupy the internal space of the sleeve 9, increasing the air pressure in the sleeve 9, thereby increasing the temperature in the sleeve 9. At this time, the heat is transferred to the workpiece in contact with the support rod 10 through heat exchange, so that the semi-finished workpiece is in a warm state, thereby increasing the plasticity of the blank and facilitating stretching.

[0034] During the stretching process, the resistance of the movable mold 2 is detected by the detection mechanism. When the resistance of the movable mold 2 increases, the staff starts the servo motor 7, and drives the bidirectional threaded rod 6 to rotate through the servo motor 7. At this time, the two sliders 8 move away from each other, driving the left mold 301 and the right mold 302 to separate. At this time, with the cooperation of the support rod 10 and the clamping mechanism, the workpiece can be prevented from shaking during the separation of the left mold 301 and the right mold 302. Then the staff can apply lubricating oil again on the bottom wall of the semi-finished workpiece formed by stretching to facilitate continued stretching, reduce the defective rate, and save costs.

[0035] The support rod 10 cooperates with the clamping mechanism to prevent the semi-finished workpiece from shaking during the lubricating oil application process. Therefore, there is no need to adjust the position of the semi-finished workpiece again during the closing process of the left mold 301 and the right mold 302, which improves work efficiency.

[0036] like Figure 6 As shown, the clamping mechanism includes a first mounting groove provided on the side wall of the movable mold 2, a push rod 12 made of a magnetic material is slidably inserted into the first mounting groove, and a spring 13 is installed between the push rod 12 and the end surface of the socket; A first magnet 14 that repels the ejector rod 12 is embedded in the fixed mold 3 , and the first magnet 14 is embedded in the left mold 301 .

[0037] During the downward movement of the movable mold 2, the ejector pin 12 gradually approaches the left mold 301. At this time, when the bottom wall of the movable mold 2 and the top wall of the fixed mold 3 are in the same plane, the repulsive force between the first magnet 14 and the ejector pin 12 is greater than the elastic force of the spring 13, so the ejector pin 12 retracts into the first mounting groove, and the spring 13 is in a compressed state. During the working process, when it is necessary to apply lubricating oil to the left mold 301 and the right mold 302 separately, the left mold 301 drives the first magnet 14 away from the push rod 12. At this time, the spring 13 pushes the push rod 12, so that the push rod 12 applies pressure to the semi-finished workpiece mounted on the movable mold 2, thereby preventing the workpiece from falling. When the lubricating oil is applied and the left mold 301 and the right mold 302 are closed again, the semi-finished workpiece can be located in the initial position for easy processing.

[0038] like Figure 4 As shown, a second mounting groove is provided on the top wall of the support rod 10, and a suction cup 15 with an opening facing upward is fixedly installed in the second mounting groove, and the ratio of the diameter of the second mounting groove to the maximum diameter of the suction cup 15 is 1.2-1.3, and the distance between the top wall of the suction cup 15 and the top wall of the support rod 10 is 2-4mm, so when the blank is placed on the surface of the fixed mold 3, the suction cup 15 is subjected to pressure and deformed, and the suction cup 15 sinks into the second mounting groove, at which time the suction cup 15 can be tightly adsorbed on the bottom wall of the semi-finished workpiece, so that the blank can be prevented from shaking at the moment when the movable mold 2 contacts the blank, and then the blank is always located at the specified position during the stretching process to prevent the blank from shifting, and for the blank with uneven thickness, it plays a role in preventing it from being torn due to uneven force during the stretching process; When the left mold 301 and the right mold 302 are separated, the suction cup 15 can also fix the semi-finished workpiece, thereby improving stability during the process of applying lubricating oil, eliminating the need for subsequent adjustment of the position of the semi-finished workpiece, and playing a role in improving work efficiency.

[0039] like Figure 5 As shown, the pressurizing mechanism includes an elastic sleeve 16 sleeved on the bidirectional threaded rod 6, and the two ends of the elastic sleeve 16 are fixedly connected to the frame 1 and the slider 8 respectively, and a cavity 17 is opened on the elastic sleeve 16, and a conduit 18 extending into the sleeve 9 is inserted on the side wall of the cavity 17; when the two sliders 8 move away from each other, the elastic sleeve 16 can be squeezed, and when the two sliders 8 move toward each other, the elastic sleeve 16 can be stretched; that is, the cavity 17 can be stretched or squeezed during the movement of the slider 8; When the cavity 17 is stretched, the cavity 17 draws air from the sleeve 9 through the conduit 18. At this time, the sleeve 9 is in a negative pressure state, so the support rod 10 retracts into the sleeve 9; when the cavity 17 is squeezed, the gas in the cavity 17 is discharged into the sleeve 9 through the conduit 18. At this time, the air pressure in the sleeve 9 increases, and the support rod 10 extends from the sleeve 9 and gradually moves upward and passes through the through hole; thereby driving the support rod 10 to move upward.

[0040] Since the thrust provided by the air pressure provided by the cavity 17 on the support rod 10 is less than the pressure of the hydraulic rod 4, when the support rod 10 moves up to the maximum, the support rod 10 will be unable to move. At this time, the slider 8 continues to squeeze the elastic sleeve 16, so the air pressure in the sleeve 9 gradually increases. At this time, the gas temperature in the sleeve 9 increases, and then the heat can be transferred to the blank by heat exchange, thereby increasing the plasticity of the blank, thereby facilitating subsequent stretching and improving work efficiency.

[0041] like Figure 4 As shown, a slide groove is vertically opened on the side wall of the frame 1 close to the fixed mold 3, and a magnetic card plate 19 is slidably installed in the slide groove. A card groove 20 is vertically opened on the side wall of the card plate 19, and the card groove 20 runs through the top wall and the bottom wall of the card plate 19.

[0042] A second electromagnet 21 is fixedly mounted on the bottom wall of the slideway. The second electromagnet 21 is connected in parallel with the servo motor 7 , and the clamping plate 19 and the second electromagnet 21 repel each other.

[0043] During normal operation, the left mold 301 and the right mold 302 are in a mold closing state. At this time, the side walls of the two sliders 8 are also fitted together, and under the action of gravity, the card plate 19 falls to the surface of the second electromagnet 21. At this time, the two sliders 8 are both located in the card slot 20, so the left mold 301 and the right mold 302 can be tightly fitted together, which plays a role in ensuring that the stretching mold can work normally; when it is necessary to separate the left mold 301 and the right mold 302 and apply lubricating oil, the servo motor 7 is powered on, and the servo motor 7 is controlled by the program to delay 2-3 seconds after power-on before starting to work. At the moment the servo motor 7 is powered on, the second electromagnet 21 is also powered on. At this time, a magnetic field that repel each other with the card plate 19 is generated around the second electromagnet 21, so the card plate 19 moves up, and when the card plate 19 is out of contact with the slider 8, the servo motor 7 starts to work; After the lubricating oil is applied, the servo motor 7 drives the two sliders 8 to move closer to each other. After the left mold 301 and the right mold 302 are closed, the servo motor 7 is powered off. At this time, the second electromagnet 21 is also powered off, so that the clamping plate 19 falls downward, so that the two sliders 8 can be fixed together again, facilitating the normal subsequent stretching process.

[0044] The servo motor 7 can be controlled by a program to delay a period of time before starting to work after being powered on, which is a prior art and will not be described in detail.

[0045] like Figure 5 As shown, an exhaust valve 22 and a one-way valve 23 are embedded on the side wall of the sleeve 9, the output end of the exhaust valve 22 is connected to the sleeve 9, and the input end of the exhaust valve 22 is connected to the conduit 18; The one-way valve 23 and the exhaust valve 22 are respectively located at the top and the bottom of the side wall of the sleeve 9 , and the output end of the one-way valve 23 is connected to the conduit 18 .

[0046] During the stretching process, the support rod 10 can move to the surface of the one-way valve 23 in an instant, thereby blocking the one-way valve 23; therefore, during the exhaust of the cavity 17, the gas only flows into the sleeve 9 through the exhaust valve 22; even after the subsequent addition of lubricating oil, the sleeve 9 can still be in a high temperature and high pressure state; thereby improving the heating effect of the semi-finished workpiece.

[0047] After one processing is completed, the telescopic rod 5 moves upward. When the telescopic rod 5 moves upward to the maximum, the telescopic rod 5 is out of contact with the one-way valve 23. At this time, the gas in the sleeve 9 flows back to the cavity 17 through the one-way valve 23 and the conduit 18, which prepares for working again.

[0048] like Figure 5 As shown, a cavity 24 is provided on the elastic member 11, and holes are evenly provided on the side walls of the cavity 24. Therefore, during the extrusion of the elastic member 11, the holes exhaust air outward, thereby driving the hot air in the sleeve 9 to flow, thereby increasing the probability of the hot air in the sleeve 9 contacting the support rod 10, improving the heating effect on the workpiece in the stretched state, increasing the plasticity of the blank, and reducing the probability of being torn during the stretching process.

[0049] like Figure 1 , Figure 3 As shown, the detection mechanism includes a storage module 25, a comparison module 26 and an alarm module 27 arranged on the frame 1, and the storage module 25 stores the standard thrust value of the movable mold 2 during the stretching process, that is, the resistance value of the movable mold 2 when the surface of the blank is always evenly covered with a lubricating film during the entire stretching process; The movable mold 2 is provided with a pressure detection module 28, which is a pressure sensor, and the pressure sensor is installed on the top wall of the movable mold 2. The output end of the hydraulic rod 4 applies pressure to the pressure sensor, and then the pressure is transmitted to the movable mold 2, thereby driving the movable mold 2 to move downward, and the magnitude of the thrust exerted on the movable mold 2 can be detected by the pressure sensor; therefore, whether the resistance exerted on the movable mold 2 changes can be detected by the pressure sensor; the pressure detection module 28 sends the detected data to the comparison module 26.

[0050] The comparison module 26 retrieves data from the storage module 25, processes the received data, and sends the processing result to the alarm module 27; compares the standard data with the data obtained by the pressure detection module 28, so as to understand whether the lubricating film on the surface of the blank is uniform during the stretching process; when hour; The surface of the blank is evenly covered with a lubricating film and can be stretched normally; when hour; The comparison module 26 sends the comparison result to the alarm module 27, indicating that the lubricating film on the surface of the blank is damaged, and there is a risk of tearing the blank; Wherein, F0 is the thrust required for the movable mold 2 to move downward when the surface of the blank is evenly covered with a lubricating film, which is a preset value stored in the storage module 25; F is the actual thrust detected by the pressure detection module 28 during the downward movement of the movable mold 2; Therefore, it can remind the staff to apply the lubricating film on the surface of the blank again, which saves costs and reduces the defective rate.

[0051] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A drawing and forming die for a combustion chamber, comprising a frame (1), wherein a movable die (2) and a fixed die (3) are provided on the frame (1), a hydraulic rod (4) and a telescopic rod (5) are provided on the frame (1), an output end of the telescopic rod (5) is fixedly connected to the movable die (2), and a die cavity is provided on the fixed die (3); Features: The frame (1) is provided with a detection mechanism for detecting the state of the lubricating film on the surface of the blank; The fixed mold (3) comprises a left mold (301) and a right mold (302); a bidirectional threaded rod (6) is rotatably mounted on the frame (1); a servo motor (7) for driving the bidirectional threaded rod (6) to rotate is provided on the frame (1); two sliders (8) are threadedly mounted on the bidirectional threaded rod (6); the left mold (301) and the right mold (302) are respectively fixedly connected to the corresponding sliders (8); and a clamping mechanism for fixing the product is provided on the movable mold (2); A sleeve (9) is vertically fixedly mounted on the frame (1), a support rod (10) is vertically slidably inserted on the top wall of the sleeve (9), an elastic member (11) is installed between the support rod (10) and the inner bottom wall of the sleeve (9), a through hole cooperating with the support rod (10) is opened on the bottom wall of the mold cavity, and a pressurizing mechanism for increasing the supporting force of the support rod (10) is provided on the frame (1).

2. A drawing die for a combustion chamber according to claim 1, characterized in that: The clamping mechanism comprises a first mounting groove formed on the side wall of the movable mold (2), a push rod (12) made of a magnetic material being slidably inserted into the first mounting groove, and a spring (13) being installed between the push rod (12) and the end surface of the socket; The fixed mold (3) is embedded with a first magnet (14) which repeles the ejector rod (12).

3. A drawing die for a combustion chamber according to claim 2, characterized in that: A second mounting groove is provided on the top wall of the support rod (10), and a suction cup (15) with an opening facing upward is fixedly mounted in the second mounting groove.

4. A drawing die for a combustion chamber according to claim 3, characterized in that: The pressurizing mechanism comprises an elastic sleeve (16) sleeved on a bidirectional threaded rod (6), and two ends of the elastic sleeve (16) are respectively fixedly connected to the frame (1) and the slider (8), a cavity (17) is formed on the elastic sleeve (16), and a conduit (18) extending into the sleeve (9) is inserted into the side wall of the cavity (17).

5. A drawing die for a combustion chamber according to claim 4, characterized in that: A sliding groove is vertically provided on the side wall of the frame (1) close to the fixed mold (3), a clamping plate (19) made of magnetic material is slidably installed in the sliding groove, and a clamping groove (20) is vertically provided on the side wall of the clamping plate (19).

6. A drawing die for a combustion chamber according to claim 5, characterized in that: A second electromagnet (21) is fixedly mounted on the bottom wall of the slide slot, the second electromagnet (21) is connected in parallel with the servo motor (7), and the clamping plate (19) and the second electromagnet (21) repel each other.

7. A drawing die for a combustion chamber according to claim 6, characterized in that: An exhaust valve (22) and a one-way valve (23) are embedded on the side wall of the sleeve (9); the output end of the exhaust valve (22) is in communication with the sleeve (9), and the input end of the exhaust valve (22) is in communication with the conduit (18); The one-way valve (23) and the exhaust valve (22) are respectively located at the top and bottom of the side wall of the sleeve (9), and the output end of the one-way valve (23) is in communication with the conduit (18).

8. The drawing die for a combustion chamber according to claim 7, characterized in that: The elastic member (11) is provided with a cavity (24), and holes are evenly provided on the side wall of the cavity (24).

9. A drawing die for a combustion chamber according to claim 8, characterized in that: The detection mechanism comprises a storage module (25), a comparison module (26) and an alarm module (27) arranged on the frame (1), wherein the storage module (25) stores a standard thrust value received by the movable mold (2) during the stretching process; The movable mold (2) is provided with a pressure detection module (28); the pressure detection module (28) sends the detected data to the comparison module (26).

10. A drawing die for a combustion chamber according to claim 9, characterized in that: The comparison module (26) retrieves data from the storage module (25), processes the received data, and sends the processing result to the alarm module (27).

Images