Automobile calandria necking die

Abstract

The utility model discloses an automobile calandria necking die which comprises an upper die assembly, a lower die assembly is arranged below the upper die assembly, a limiting assembly is fixed to the bottom end of the upper die assembly, and the limiting assembly comprises spring shafts symmetrically installed at the bottom end of the upper die assembly. By arranging the limiting assembly, when the upper die assembly moves towards the lower die assembly, a support in the limiting assembly can make contact with an exhaust pipe placed in advance, when the exhaust pipe is obliquely placed, the support makes contact with the inclined end of the exhaust pipe firstly, at the moment, the inclined end of the exhaust pipe is stressed to move downwards, and therefore the exhaust pipe is leveled; the exhaust pipe and the die are prevented from being damaged due to collision between the exhaust pipe and the lower die in the necking process, the support rotates along the supporting shaft under the pressure of the exhaust pipe after leveling till the die column enters the exhaust pipe, the idler wheels are influenced by friction force in the descending process, and friction between the support and the inner wall of the exhaust pipe is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile exhaust pipe shrinkage molds, in particular to an automobile exhaust pipe shrinkage mold. Background Art

[0002] 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, making the entire exhaust system flexibly connected, thereby reducing vibration and noise, facilitating installation and extending the life of the exhaust muffler system.

[0003] During the production process of automobile exhaust pipes, the exhaust pipe needs to be placed in the lower die, and then the hydraulic press drives the upper die to move toward the lower die to drive the exhaust pipe to contact the forming seat in the lower die for shrinking. However, during the process, the placement of the exhaust pipe is prone to tilt, which causes the exhaust pipe to collide with the lower die during shrinking, causing damage to the exhaust pipe and the mold. Utility Model Content

[0004] The main purpose of the utility model is to provide a shrinking die for automobile exhaust pipes.

[0005] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0006] A car exhaust pipe shrinkage mold includes an upper mold assembly, a lower mold assembly is arranged below the upper mold assembly, a limiting assembly is fixed to the bottom end of the upper mold assembly, the limiting assembly includes a spring shaft symmetrically installed at the bottom end of the upper mold assembly, a bent bracket is connected to the outer side of the spring shaft, a support shaft is installed in the bent part of the bracket, a roller is rotatably connected to the outer side of the support shaft, and the outer side of the roller is located on the outer side of the bracket.

[0007] Preferably, the upper mold assembly includes an upper mold plate located at the top, and a mold column is arranged below the upper mold plate.

[0008] Preferably, a top plate is installed in the middle of the outer side of the mold column, and the diameter of the top plate is smaller than the diameter of the upper mold plate.

[0009] Preferably, the lower mold assembly includes a lower mold plate located at the bottom, a mold base is arranged above the lower mold plate, and a mold cavity is opened in the mold base.

[0010] Preferably, an exhaust pipe is provided on the mold base inside the mold cavity, the outer diameter of the exhaust pipe matches the inner diameter of the mold cavity, and a molding base is fixed at the bottom end of the mold cavity.

[0011] Preferably, the mold column is connected to the upper mold plate via mounting bolts, and the mold base is connected to the mold base via the mounting bolts.

[0012] Preferably, an empty groove for installing the spring shaft is opened at the bottom end of the die post.

[0013] The beneficial technical effects are as follows:

[0014] By setting the limiting component, when the upper die component moves towards the lower die component, the bracket in the limiting component will contact the pre-placed exhaust pipe. When the exhaust pipe is placed obliquely, the bracket will first contact the inclined end of the exhaust pipe. At this time, the inclined end of the exhaust pipe is forced to move downward, thereby leveling the exhaust pipe, preventing the exhaust pipe from colliding with the lower die during necking and causing damage to the exhaust pipe and the die. And after leveling, the bracket rotates along the support shaft under the pressure of the exhaust pipe until the die post enters the exhaust pipe, and during the descending process, the roller can move along the support shaft under the influence of friction, avoiding friction between the bracket and the inner wall of the exhaust pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a preferred embodiment of an automobile exhaust pipe necking die according to the present invention;

[0016] Figure 2 is a main sectional view of a preferred embodiment of an automobile exhaust pipe necking die according to the present invention;

[0017] Figure 3 is an exploded structural diagram of a preferred embodiment of an automobile exhaust pipe necking die according to the present invention;

[0018] Figure 4 is in a preferred embodiment of an automobile exhaust pipe necking die according to the present invention Figure 2 an enlarged view of part A.

[0019] The description of the reference numerals is as follows:

[0020] 1. Upper die component; 101. Upper template; 102. Die post; 103. Top plate; 2. Lower die component; 201. Lower template; 202. Die base; 203. Die cavity; 3. Exhaust pipe; 4. Limiting component; 401. Spring shaft; 402. Bracket; 403. Support shaft; 404. Roller; 5. Forming seat; 6. Installation bolt; 7. Empty groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To make the technical solutions of the present invention clearer and more definite for those skilled in the art, the present invention will be further described in detail below in conjunction with the embodiments and the drawings, but the implementation manners of the present invention are not limited thereto.

[0022] Such as Figures 1 - 4As shown in the figure, an automobile exhaust pipe necking die provided in this embodiment includes an upper die assembly 1. A lower die assembly 2 is arranged below the upper die assembly 1. A limiting assembly 4 is fixed to the bottom end of the upper die assembly 1. The limiting assembly 4 includes spring shafts 401 symmetrically installed at the bottom end of the upper die assembly 1. The spring shafts 401 can reset the bracket 402. A bent bracket 402 is connected to the outside of the spring shafts 401. The bracket 402 can level the inclined exhaust pipe 3. A support shaft 403 is installed inside the bent part of the bracket 402. The support shaft 403 can support the roller 404. A roller 404 is rotatably connected to the outside of the support shaft 403. The roller 404 can prevent the bracket 402 from rubbing against the inner wall of the exhaust pipe 3, and the outside of the roller 404 is located outside the bracket 402.

[0023] As Figures 1 - 3 shown, the upper die assembly 1 includes an upper template 101 at the top. A die post 102 is arranged below the upper template 101, which is convenient for fixing the die post 102 through the upper template 101, and then installing the upper die assembly 1 on the movable end of the hydraulic press through the upper template 101.

[0024] As Figures 1 - 3 shown, a top plate 103 is installed in the middle of the outside of the die post 102, and the diameter of the top plate 103 is smaller than the diameter of the upper template 101, which is convenient for the top plate 103 to drive the exhaust pipe 3 to press down and contact the forming seat 5.

[0025] As Figures 1 - 3 shown, the lower die assembly 2 includes a lower template 201 at the bottom. A die seat 202 is arranged above the lower template 201. A die cavity 203 is opened in the die seat 202, which can enable the die seat 202 to be installed on the lower template 201, and install the lower die assembly 2 on the fixed end of the hydraulic press through the die seat 202.

[0026] As Figures 1 - 3 shown, an exhaust pipe 3 is arranged in the die cavity 203 on the die seat 202. The outer diameter of the exhaust pipe 3 fits the inner diameter of the die cavity 203, and a forming seat 5 is fixed at the bottom end of the die cavity 203, which is convenient for placing the exhaust pipe 3 in the die cavity 203 and necking the exhaust pipe 3 through the forming seat 5.

[0027] As Figures 1 - 3 shown, the die post 102 and the upper template 101 are connected by mounting bolts 6, and the die seat 202 and the die seat 202 are connected by mounting bolts 6, which is convenient for installing the die post 102 and the die seat 202 on the upper template 101 and the lower template 201 respectively through the mounting bolts 6.

[0028] As Figure 4 shown, an empty slot 7 for installing the spring shaft 401 is opened at the bottom end of the die post 102, which is convenient for the spring shaft 401 to be fixed at the bottom end of the die post 102 through the empty slot 7.

[0029] Working principle of this device: When this device is in specific use, the die column 102 and the die base 202 are respectively installed on the upper template 101 and the lower template 201 through the mounting bolts 6, and the upper die assembly 1 is installed on the movable end of the hydraulic press through the upper template 101, and the lower die assembly 2 is installed on the fixed end of the hydraulic press through the die base 202. After the installation is completed, the staff places the exhaust pipe 3 in the die cavity 203 on the die base 202. At this time, the hydraulic press drives the upper die assembly 1 to move towards the lower die assembly 2. During the movement, the bracket 402 in the limit assembly 4 will contact the exhaust pipe 3. When the exhaust pipe 3 is placed obliquely, the bracket 402 will first contact the inclined end of the exhaust pipe 3. At this time, the inclined end of the exhaust pipe 3 is forced to move downward, thereby leveling the exhaust pipe 3 to prevent the exhaust pipe 3 from colliding with the lower die during necking, which may cause damage to the exhaust pipe 3 and the mold. And after leveling, the bracket 402 rotates along the support shaft 403 under the pressure of the exhaust pipe 3 until the die column 102 enters the exhaust pipe 3, and during the descent, the roller 404 can rotate along the support shaft 403 under the influence of friction to avoid friction between the bracket 402 and the inner wall of the exhaust pipe 3. When the top plate 103 contacts the exhaust pipe 3, the exhaust pipe 3 is forced to contact the forming seat 5 to complete the necking process.

[0030] The above are only further embodiments of the present utility model. The protection scope of the present utility model is not limited thereto. Any person skilled in the art within the scope disclosed by the present utility model, according to the technical solution and its concept of the present utility model, makes equivalent substitutions or changes, all belong to the protection scope of the present utility model.

Claims

1. An automobile exhaust pipe necking die, characterized in that: It includes an upper die assembly (1), a lower die assembly (2) is arranged below the upper die assembly (1), a limiting assembly (4) is fixed to the bottom end of the upper die assembly (1), the limiting assembly (4) includes spring shafts (401) symmetrically installed at the bottom end of the upper die assembly (1), a bent bracket (402) is connected to the outside of the spring shafts (401), a support shaft (403) is installed inside the bent part of the bracket (402), a roller (404) is rotatably connected to the outside of the support shaft (403), and the outside of the roller (404) is located outside the bracket (402).

2. The automotive exhaust pipe necking die according to claim 1, wherein: The upper die assembly (1) includes an upper template (101) at the top, and a die post (102) is arranged below the upper template (101).

3. A necking die for an automobile exhaust pipe according to claim 2, characterized in that: A top plate (103) is installed in the middle of the outside of the die post (102), and the diameter of the top plate (103) is smaller than the diameter of the upper template (101).

4. A necking die for an automotive exhaust pipe according to claim 3, characterized in that: The lower die assembly (2) includes a lower template (201) at the bottom, a die base (202) is arranged above the lower template (201), and a die cavity (203) is opened in the die base (202).

5. The automotive exhaust pipe necking die according to claim 4, characterized in that: An exhaust pipe (3) is arranged in the die cavity (203) on the die base (202), the outer diameter of the exhaust pipe (3) fits with the inner diameter of the die cavity (203), and a forming seat (5) is fixed at the bottom end of the die cavity (203).

6. The automotive exhaust pipe necking die according to claim 5, characterized in that: The die post (102) and the upper template (101) are connected by mounting bolts (6), and the die base (202) and the die base (202) are connected by the mounting bolts (6).

7. A necking die for an automobile exhaust pipe according to claim 2, wherein: An empty slot (7) for installing the spring shaft (401) is opened at the bottom end of the die post (102).

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