Automobile exhaust pipe forming machining die

Abstract

The application belongs to the field of exhaust pipe forming processing, and provides an automobile exhaust pipe forming processing die, which comprises a processing table, a supporting frame is fixedly connected to the processing table, the upper end of the supporting frame is fixedly connected with a hydraulic rod, the telescopic end of the hydraulic rod is fixedly connected with a No. 1 fixed plate, the No. 1 fixed plate is fixedly connected with an upper die, a lower die is embedded at the position opposite to the upper die on the upper end surface of the processing table, and sealing seats are elastically connected to the two sides of the upper die and the lower die; a plurality of material guiding barrels are communicated side by side on the outer end surfaces of the upper die and the lower die, the telescopic end of the electric push rod is fixedly connected with a No. 2 fixed plate, and the No. 2 fixed plate is connected with a plurality of pressure increasing mechanisms. In the application, the air between the exhaust pipe blank and the upper die and the lower die is also discharged from the guide holes on the material guiding barrels, so that the excess air between the exhaust pipe blank and the upper die and the lower die does not affect the exhaust pipe forming.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of exhaust pipe forming processing, and particularly relates to a forming processing die for automobile exhaust pipes. BACKGROUND

[0002] The automobile exhaust bellows, also known as automobile exhaust pipe hose, is installed in the exhaust pipe between the engine exhaust branch pipe and the muffler, so that the entire exhaust system is flexibly connected, thereby playing the role of vibration and noise reduction, facilitating installation and prolonging the service life of the exhaust muffling system. It is mainly used for light vehicles, micro vehicles and passenger cars, and its structure is a double-layer bellows covered with a steel wire mesh sleeve, and the two ends are straight edge segments with snap ring structures. In order to achieve better muffling effect, an expansion joint or mesh sleeve can be arranged inside the bellows.

[0003] After a series of processing, the automobile exhaust pipe blank still needs to be put into the die, and then the surface of the automobile exhaust pipe blank is processed and formed under the extrusion of the die. In the use of the existing automobile exhaust pipe forming processing die, two dies are generally pushed to adhere by a pressing mechanism, so that the outer wall of the exhaust pipe blank in the two dies is processed and formed.

[0004] However, when the existing automobile exhaust pipe forming processing die is used, the excess blank will be extruded out from the joint between the two dies, so that the inner wall of the exhaust pipe blank at the center position of each die is not effectively adhered, and the surface forming precision of the automobile exhaust pipe is not enough. SUMMARY

[0005] The purpose of the present application is to provide an automobile exhaust pipe forming processing die, which aims to solve the technical problem that the exhaust pipe blank is not effectively adhered to the inner wall at the center position of each die in the prior art, resulting in insufficient surface forming precision of the automobile exhaust pipe.

[0006] The present application is realized in this way. An automobile exhaust pipe forming processing die comprises a processing table, the processing table is fixedly connected with a support frame, the upper end of the support frame is fixedly connected with a hydraulic rod, the telescopic end of the hydraulic rod is fixedly connected with a No. 1 fixed plate, the No. 1 fixed plate is fixedly connected with an upper die, a lower die is embedded at the position opposite to the upper die on the upper end surface of the processing table, a buffer assembly for guiding and buffering the upper die is arranged on the lower die, and a sealing seat is elastically connected to the two sides of the upper die and the lower die;

[0007] A plurality of material guiding barrels are communicated side by side on the outer end surfaces of the upper die and the lower die, a fixed frame is fixedly arranged on the outer end surfaces of the upper die and the lower die, an electric push rod is fixedly connected to the fixed frame, a No. 2 fixed plate is fixedly connected to the telescopic end of the electric push rod, a plurality of pressure increasing mechanisms are connected to the No. 2 fixed plate, each pressure increasing mechanism is opposite to one material guiding barrel, a driving mechanism is connected to the No. 2 fixed plate, and the driving mechanism can drive all the pressure increasing mechanisms to rotate simultaneously.

[0008] Each guide cylinder is provided with a plurality of guide holes near the bottom, and the outer part of the guide cylinder is fixedly provided with an electric telescopic sleeve which can be extended and retracted.

[0009] Further technical solutions: the pressure increasing mechanism comprises a fixed rod, a pressing head and a pressing block.

[0010] The fixed rod is rotatably connected with the second fixed plate, one end of the fixed rod is slidably connected with the pressing head, and the fixed rod and the pressing head are elastically connected with an elastic member, the end face of the pressing head away from the fixed rod is provided with a plurality of pressing blocks, and the pressing head is throughly connected with a plurality of air outlets.

[0011] Further technical solutions: the contact part of the elastic member and the pressing head is provided with a pressure sensor.

[0012] Further technical solutions: the pressing blocks are all triangular, and the openings of one end of each air outlet are distributed in the middle parts of two pressing blocks.

[0013] Further technical solutions: the driving mechanism comprises a telescopic rod, a rack and a gear;

[0014] The telescopic rod is fixedly connected with the second fixed plate, and the telescopic rod is provided with a plurality of racks, and the fixed rod is fixedly connected with a gear, and each rack is engaged with a gear.

[0015] Further technical solutions: the buffer assembly comprises a guide rod and a spring, the guide rod is fixedly connected with the lower die, the spring is sleeved outside the guide rod, the upper die is fixedly connected with a guide seat, and the guide holes in the guide seat are all opposite to the guide rod.

[0016] Further technical solutions: the side surface of the sealing seat towards the center of the upper die or the lower die is a slope.

[0017] Compared with the prior art, the beneficial effects of the present application are as follows:

[0018] 1. As the upper die moves downward, the exhaust pipe blank between the upper die and the lower die is extruded, and because all the sealing seats preseal the connection between the upper die and the lower die, the excess part of the exhaust pipe blank is concentrated to the middle part of the upper die and the lower die at this time, and the excess part of the exhaust pipe blank is concentrated to all the guide cylinders, so as to improve the forming precision of the exhaust pipe forming surface;

[0019] 2. When the exhaust pipe excess blank fills the guide cylinder, the air between the exhaust pipe blank and the upper die and the lower die is also discharged from the guide holes on the guide cylinder at this time, so as to avoid the influence of the excess air between the exhaust pipe blank and the upper die and the lower die on the exhaust pipe forming.

[0020] 3、The electric telescopic sleeve seals all the guide holes on the guide cylinder, the electric telescopic sleeve can cut off the excess blank part outside the guide hole, then the electric push rod is started, the electric push rod drives all the booster mechanisms to extrude the blank part in the guide cylinder, at this time, since the electric telescopic sleeve seals all the guide holes, the blank part in the guide cylinder can be further extruded into the upper die and the lower die, the adhesion of the exhaust pipe blank and the side wall of the upper die and the lower die is increased, and the forming precision of the outer wall of the exhaust pipe is further improved;

[0021] 4、The driving mechanism can drive all the booster mechanisms to rotate at the same time, under the action of the torsional force of the booster mechanism, the excess exhaust pipe blank in the guide cylinder is subjected to a transverse shearing force, at this time, since the exhaust pipe blank is embedded with each guide hole on the guide cylinder, the blank part is cut off at the position close to the guide hole, on the one hand, the transverse shearing force caused by the torsion does not affect the surface forming of the exhaust pipe blank in the upper die and the lower die, on the other hand, it is also convenient for subsequent taking out of the exhaust pipe from the upper die and the lower die, preventing the excess blank part from being too tightly clamped with the inside of the guide cylinder, so that the exhaust pipe blank in the upper die and the lower die is difficult to take out. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0023] Figure 2 It is a schematic diagram of the structure of the lower die in the present application.

[0024] Figure 3 It is a schematic diagram of the structure of the upper die in the present application.

[0025] Figure 4 It is a schematic diagram of the structure of the driving mechanism in the present application.

[0026] Figure 5 It is Figure 3 It is an enlarged schematic diagram of area A.

[0027] Figure 6 It is a schematic diagram of the structure of the booster mechanism in the present application.

[0028] In the drawings: 1, processing table; 2, upper die; 3, lower die; 4, sealing seat; 5, buffer assembly; 51, guide rod; 52, spring; 6, guide cylinder; 7, booster mechanism; 71, fixed rod; 72, lower pressing head; 73, pressing block; 74, air outlet hole; 8, driving mechanism; 81, telescopic rod; 82, rack; 83, gear; 9, guide seat; 10, support frame; 11, hydraulic rod; 12, No. 1 fixed plate; 13, fixed frame; 14, electric push rod; 15, No. 2 fixed plate; 16, guide hole; 17, electric telescopic sleeve. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0030] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0031] like Figures 1-6 As shown, this invention provides a molding die for forming an automotive exhaust pipe, comprising a processing table 1, a support frame 10 fixedly connected to the processing table 1, a hydraulic rod 11 fixedly connected to the upper end of the support frame 10, a first fixing plate 12 fixedly connected to the telescopic end of the hydraulic rod 11, an upper mold 2 fixedly connected to the first fixing plate 12, a lower mold 3 fitted onto the upper surface of the processing table 1 directly opposite the upper mold 2, a buffer assembly 5 provided on the lower mold 3 to guide and buffer the upper mold 2, and sealing seats 4 elastically connected to both sides of the upper mold 2 and the lower mold 3.

[0032] The outer end faces of the upper mold 2 and the lower mold 3 are connected side by side by multiple guide cylinders 6. The outer end faces of the upper mold 2 and the lower mold 3 are fixedly provided with a fixing frame 13. The fixing frame 13 is fixedly connected with an electric push rod 14. The telescopic end of the electric push rod 14 is fixedly connected with a second fixing plate 15. The second fixing plate 15 is connected with multiple pressure boosting mechanisms 7. Each pressure boosting mechanism 7 is directly opposite a guide cylinder 6. The second fixing plate 15 is connected with a driving mechanism 8. The driving mechanism 8 can drive all the pressure boosting mechanisms 7 to rotate simultaneously.

[0033] Each guide cylinder 6 has several guide holes 16 near its bottom. A retractable electric telescopic sleeve 17 is fixedly installed on the outside of the guide cylinder 6, and the electric telescopic sleeve 17 is in contact with the outer wall of the guide cylinder 6.

[0034] In this embodiment, the exhaust pipe blank is placed in the lower mold 3, and the hydraulic rod 11 is activated. The hydraulic rod 11 drives the upper mold 2 to move down, and the upper mold 2 moves closer to the lower mold 3. At this time, the buffer component 5 guides and buffers the upper mold 2. Then, all the sealing seats 4 on the upper mold 2 and the lower mold 3 are pre-fitted. As the upper mold 2 moves down, the exhaust pipe blank between the upper mold 2 and the lower mold 3 is squeezed. Since all the sealing seats 4 pre-close the connection between the upper mold 2 and the lower mold 3, the excess part of the exhaust pipe blank is concentrated in the middle of the upper mold 2 and the lower mold 3, and the excess part of the exhaust pipe blank is concentrated in all the guide cylinders 6, which improves the forming accuracy of the exhaust pipe forming surface.

[0035] When the exhaust pipe excess blank fills the guide cylinder 6, the air between the exhaust pipe blank and the upper die 2 and the lower die 3 is also discharged from the guide hole 16 on the guide cylinder 6, thereby avoiding the influence of the excess air between the exhaust pipe blank and the upper die 2 and the lower die 3 on the exhaust pipe forming;

[0036] After the electric telescopic sleeve 17 is started to extend, the electric telescopic sleeve 17 seals all the guide holes 16 on the guide cylinder 6, the electric telescopic sleeve 17 can cut off the excess blank part outside the guide hole 16, then the electric push rod 14 is started, the electric push rod 14 drives all the booster mechanisms 7 to extrude the blank part in the guide cylinder 6, at this time, since the electric telescopic sleeve 17 seals all the guide holes 16, the blank part in the guide cylinder 6 can be further extruded into the upper die 2 and the lower die 3, the adhesion of the exhaust pipe blank to the side wall of the upper die 2 and the lower die 3 is increased, and the forming precision of the outer wall of the exhaust pipe is further improved.

[0037] At this time, the driving mechanism 8 is started, the driving mechanism 8 can drive all the booster mechanisms 7 to rotate at the same time, under the action of the torsional force of the booster mechanism 7, the excess exhaust pipe blank in the guide cylinder 6 is subjected to a transverse shearing force, at this time, since the exhaust pipe blank is embedded in each guide hole 16 on the guide cylinder 6, the blank part is cut off at the position close to the guide hole 16, on the one hand, the transverse shearing force caused by the torsion does not affect the surface forming of the exhaust pipe blank in the upper die 2 and the lower die 3, on the other hand, it is also convenient for subsequent taking out of the exhaust pipe from the upper die 2 and the lower die 3, preventing the excess blank part from being too tightly clamped with the inside of the guide cylinder 6, so that the exhaust pipe blank in the upper die 2 and the lower die 3 is difficult to take out.

[0038] As shown in Figure 6 , the booster mechanism 7 includes a fixed rod 71, a lower pressing head 72, and a pressing block 73;

[0039] The fixed rod 71 is rotatably connected with the No. 2 fixed plate 15, one end of the fixed rod 71 is slidably connected with the lower pressing head 72, the fixed rod 71 and the lower pressing head 72 are elastically connected with an elastic member, the end face of the lower pressing head 72 away from the fixed rod 71 is provided with a plurality of pressing blocks 73, and the lower pressing head 72 is throughly connected with a plurality of gas outlets 74.

[0040] In this embodiment, the electric push rod 14 is started to extend, the electric push rod 14 drives all the No. 2 fixed plates 15 to move downward, all the fixed rods 71 drive all the lower pressing heads 72 connected therewith to press downward into the corresponding guide cylinder 6, thereby making the excess blank in all the guide cylinders 6 extrude into the upper die 2 and the lower die 3, and increasing the adhesion of the exhaust pipe blank to the inner wall of the upper die 2 and the lower die 3.

[0041] As shown in Figure 6As shown, the automobile exhaust pipe forming processing die provided by the present application, the contact part of the elastic member and the lower pressing head 72 is provided with a pressure sensor.

[0042] In this embodiment, all the fixed rods 71 drive all the lower pressing heads 72 to press down in the corresponding material guiding barrels 6, and when the pressure values of all the pressure sensors reach the set threshold value, it indicates that the excess blank in the material guiding barrel 6 has been compacted into the upper die 2 and the lower die 3.

[0043] As shown, the automobile exhaust pipe forming processing die provided by the present application, the contact part of the elastic member and the lower pressing head 72 is provided with a pressure sensor. Figure 6 As shown, the automobile exhaust pipe forming processing die provided by the present application, the contact part of the elastic member and the lower pressing head 72 is provided with a pressure sensor.

[0044] In this embodiment, the driving mechanism 8 is started, and the driving mechanism 8 drives all the fixed rods 71 to rotate, at this time, all the fixed rods 71 drive all the lower pressing heads 72 to rotate, and the lower pressing head 72 pushes the blank in contact with it to press down into the material guiding barrel 6 through the pressing block 73 at the bottom of the lower pressing head 72, at the same time, all the pressing blocks 73 exert a torsional force on the blank in the material guiding barrel 6, and since the blank near the bottom of the material guiding barrel 6 is fitted into the surrounding guide holes 16, the torsional force is converted into a shearing force when it reaches the bottom of the material guiding barrel 6, so that the blank is cut off at the position close to the guide hole 16.

[0045] As shown, the automobile exhaust pipe forming processing die provided by the present application, the contact part of the elastic member and the lower pressing head 72 is provided with a pressure sensor. Figure 4 As shown, the automobile exhaust pipe forming processing die provided by the present application, the driving mechanism 8 includes a telescopic rod 81, a rack 82 and a gear 83.

[0046] The telescopic rod 81 is fixedly connected with the second fixed plate 15, a plurality of racks 82 are arranged on the telescopic rod 81, and each of the fixed rods 71 is fixedly connected with a gear 83.

[0047] In this embodiment, the telescopic rod 81 is started to extend, and through the cooperation of the rack 82 and the gear 83, the telescopic rod 81 drives all the fixed rods 71 to rotate.

[0048] As shown, the automobile exhaust pipe forming processing die provided by the present application, the contact part of the elastic member and the lower pressing head 72 is provided with a pressure sensor. Figure 2 As shown, the automobile exhaust pipe forming processing die provided by the present application, the buffer assembly 5 includes a guide rod 51 and a spring 52, the guide rod 51 is fixedly connected with the lower die 3, the spring 52 is sleeved outside the guide rod 51, the upper die 2 is fixedly connected with a guide seat 9, and the guide holes on the guide seat 9 are all opposite to the guide rod 51.

[0049] In this embodiment, when the upper die 2 moves down, the guide rod 51 penetrates through the guide seat 9, thereby guiding the upper die 2, and at the same time, the spring 52 elastically limits the upper die 2, thereby buffering the upper die 2.

[0050] As Figure 2 The side of the sealing seat 4 towards the center of the upper die 2 or the lower die 3 is a slope.

[0051] In this embodiment, when the upper die 2 and the lower die 3 are close, all the sealing seats 4 on the upper die 2 and the lower die 3 are pre-adhered at this time. With the descending of the upper die 2, the exhaust pipe blank between the upper die 2 and the lower die 3 is extruded. All the sealing seats 4 pre-close the connection between the upper die 2 and the lower die 3. The slope of the sealing seat 4 applies a slant extrusion force to the excess blank. Thus, the excess blank of the exhaust pipe is concentrated to the middle part of the upper die 2 and the lower die 3.

[0052] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0053] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. The description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A molding die for forming automobile exhaust pipes, comprising a processing table (1), characterized in that, The processing table (1) is fixedly connected to a support frame (10), and a hydraulic rod (11) is fixedly connected to the upper end of the support frame (10). A first fixed plate (12) is fixedly connected to the telescopic end of the hydraulic rod (11). An upper mold (2) is fixedly connected to the first fixed plate (12). A lower mold (3) is fitted into the upper surface of the processing table (1) at the position directly opposite the upper mold (2). A buffer assembly (5) is provided on the lower mold (3) to guide and buffer the upper mold (2). Sealing seats (4) are elastically connected to both sides of the upper mold (2) and the lower mold (3). The outer end faces of the upper mold (2) and the lower mold (3) are connected side by side by multiple guide cylinders (6). The outer end faces of the upper mold (2) and the lower mold (3) are fixedly provided with a fixing frame (13). The fixing frame (13) is fixedly connected with an electric push rod (14). The telescopic end of the electric push rod (14) is fixedly connected with a second fixing plate (15). The second fixing plate (15) is connected with multiple pressure boosting mechanisms (7). Each pressure boosting mechanism (7) is directly opposite a guide cylinder (6). The second fixing plate (15) is connected with a driving mechanism (8). The driving mechanism (8) can drive all the pressure boosting mechanisms (7) to rotate simultaneously. Each guide cylinder (6) has several guide holes (16) near the outer end face of the upper mold (2) and the lower mold (3). A retractable electric telescopic sleeve (17) is fixedly installed on the outside of the guide cylinder (6), and the electric telescopic sleeve (17) is in contact with the outer wall of the guide cylinder (6). The pressurizing mechanism (7) includes a fixed rod (71), a lower pressure head (72), and pressure blocks (73); the fixed rod (71) is rotatably connected to the second fixed plate (15), and the lower pressure head (72) is slidably connected to one end of the fixed rod (71). An elastic element is elastically connected between the fixed rod (71) and the lower pressure head (72). Several pressure blocks (73) are provided on the end face of the lower pressure head (72) away from the fixed rod (71). Several air outlets (74) are connected through the lower pressure head (72).

2. The automotive exhaust pipe forming mold according to claim 1, characterized in that, A pressure sensor is provided at the contact point between the elastic element and the pressure head (72).

3. The automotive exhaust pipe forming and processing mold according to claim 1, characterized in that, The pressure blocks (73) are all triangular, and one end of each air outlet (74) is located in the middle of the two pressure blocks (73).

4. The automotive exhaust pipe forming mold according to claim 1, characterized in that, The drive mechanism (8) includes a telescopic rod (81), a rack (82), and a gear (83); The telescopic rod (81) is fixedly connected to the second fixing plate (15). The telescopic rod (81) is provided with several segments of rack (82). The fixing rod (71) is fixedly connected with gears (83). Each segment of rack (82) meshes with a gear (83).

5. The automotive exhaust pipe forming and processing mold according to claim 1, characterized in that, The buffer assembly (5) includes a guide rod (51) and a spring (52). The guide rod (51) is fixedly connected to the lower mold (3). The spring (52) is sleeved on the outside of the guide rod (51). The upper mold (2) is fixedly connected to a guide seat (9). The guide holes on the guide seat (9) are all aligned with the guide rod (51).

6. The automotive exhaust pipe forming mold according to claim 1, characterized in that, The side of the sealing seat (4) facing the center of the upper mold (2) or the lower mold (3) is an inclined surface.

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