Pipe expander for shaping elbow of silencer

Abstract

The utility model relates to a pipe expander for shaping a silencer bent pipe, which is provided with a machine base, a plurality of shaping blocks are arranged on a supporting plane and are distributed around a through hole on the supporting plane, the plurality of shaping blocks are enclosed to form an expanding hole, and the expanding hole is opposite to the through hole; the shaping block is provided with a chassis and an expansion part protruding upwards from the chassis; the limiting cover is installed on the supporting plane of the machine base and covers a base plate of the shaping block, and the expanding part of the shaping block protrudes upwards from a middle hole preset in the limiting cover and is used for pipe expanding work. The limiting cover is used for controlling the plurality of shaping blocks to expand and retract; the expanding shaft penetrates through the through hole from top to bottom and is inserted into the expanding hole, so that the plurality of shaping blocks synchronously and radially expand outwards, and the tube expanding work of the expanding part is realized; and after working, the expanding shaft retreats from the expanding hole, and the plurality of shaping blocks synchronously and radially retract inwards to reset. Mechanical automatic pipe expansion production is achieved, labor intensity is relieved, time and labor are saved, production efficiency is high, the device is suitable for mass production, quality is stable, uniformity is good, and enterprise development is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of muffler manufacturing, especially the technical field of pipe bending shaping processing for mufflers. BACKGROUND

[0002] In production, such as muffler production, the pipe body needs to be bent and processed, but the pipe opening is deformed by external force during the bending process, and the pipe needs to be further expanded and rounded. The traditional method is manual knocking, which is labor-intensive, low in production efficiency, not conducive to mass production, affects enterprise development, and needs to be further improved. SUMMARY

[0003] The utility model aims at providing an expander for muffler pipe shaping, which realizes mechanical instead of manual work and solves the above technical problems well.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme:

[0005] The expander for muffler pipe shaping has:

[0006] A machine base is provided with a support plane and a through hole passing through the support plane from top to bottom;

[0007] A plurality of shaping blocks are installed on the support plane of the machine base and distributed around the through hole, so that the plurality of shaping blocks form an expansion hole, and the expansion hole is coaxial with the through hole from top to bottom; the shaping block has a bottom disc and an expansion part protruding upward from the bottom disc;

[0008] A limiting cover is installed on the support plane of the machine base and covers the bottom disc of the shaping block, and the expansion part of the shaping block protrudes upward from the pre-set middle hole of the limiting cover; the limiting cover is used to control the plurality of shaping blocks, so that the plurality of shaping blocks move in and out according to the set track;

[0009] An expansion shaft is arranged on the machine base and located below the support plane, the expansion shaft passes through the through hole from top to bottom and is inserted into the expansion hole, so that the plurality of shaping blocks move outward radially synchronously to realize the pipe expansion work of the expansion part; after work, the expansion shaft exits the expansion hole, and the plurality of shaping blocks move inward radially synchronously to reset.

[0010] The above scheme further comprises the following: the expansion shaft is vertically arranged, the lower end of the expansion shaft is directly connected to the telescopic end of the air cylinder, and the air cylinder is fixed on the machine base.

[0011] The above scheme further comprises the following: after the plurality of shaping blocks are enclosed, two reset elastic members are introduced and tied, and the two reset elastic members are tied on the bottom disc and the expansion part respectively.

[0012] The above scheme further comprises the following: the shaping block is L-shaped.

[0013] The scheme further comprises that the limiting cover is a circular ring body, and a radial inner protruding guide column is further arranged on the limiting cover, the guide column corresponds to a radial guide hole prearranged on the bottom plate of the shaping block, and the guide column and the radial guide hole cooperatively guide the movement of the shaping block.

[0014] The scheme further comprises that the limiting cover is locked on the support plane of the machine base by a screw, and the guide column is implanted into a fixing hole prearranged on the limiting cover and protrudes inward.

[0015] The scheme further comprises that the air cylinder is fixed on the support plate in the machine base in a hanging mode, and the air cylinder is coaxially arranged with the expanding shaft.

[0016] The scheme further comprises that the reset elastic member is an elastic ring, and corresponding inner recessed receiving grooves are respectively arranged on the outer periphery of the bottom plate and the expanding part, and the reset elastic member is correspondingly embedded into the inner recessed receiving grooves.

[0017] The scheme further comprises that the entrance of the expanding hole is designed as a flared mouth, and the upper end of the expanding shaft is provided with a tapered head matched with the flared mouth.

[0018] The utility model discloses scientific, reasonable structure, low investment cost, through the expanding shaft insertion plurality of shaping block enclose formed expanding hole, make plurality of shaping block synchronous radial outward movement, realize the inflation work of expanding part, after work, the expanding shaft exits the expanding hole, and plurality of shaping block synchronous radial reposition in, in order to next inflation work. Realize mechanized automatic inflation production, reduce the labor intensity, save time and effort, and production efficiency is high, is suitable for mass production, and quality is stable, and uniformity is good, can also save labor, avoid the predicament of not finding people to deal with, reduce manpower cost input, help enterprise development. BRIEF DESCRIPTION OF DRAWINGS

[0019] ATTACHED Figure 1 It is the structure schematic diagram of preferable embodiment of the utility model;

[0020] ATTACHED Figure 2 It is Figure 1 The internal structure perspective schematic diagram of embodiment;

[0021] ATTACHED Figure 3 It is Figure 1 The partial structure exploded schematic diagram of embodiment;

[0022] ATTACHED Figure 4 It is Figure 1 The partial structure exploded enlarged schematic diagram of embodiment. PREFERRED EMBODIMENT

[0023] The utility model discloses scientific, reasonable structure, low investment cost, through the expanding shaft insertion plurality of shaping block enclose formed expanding hole, make plurality of shaping block synchronous radial outward movement, realize the inflation work of expanding part, after work, the expanding shaft exits the expanding hole, and plurality of shaping block synchronous radial reposition in, in order to next inflation work. Realize mechanized automatic inflation production, reduce the labor intensity, save time and effort, and production efficiency is high, is suitable for mass production, and quality is stable, and uniformity is good, can also save labor, avoid the predicament of not finding people to deal with, reduce manpower cost input, help enterprise development.

[0024] It should be noted that in the description of the utility model, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is merely for the convenience of description and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0025] Referring to Figure 1 , 2 , 3, 4, it is a preferred embodiment structure diagram of the utility model, the utility model relates to a pipe expander for shaping muffler elbow pipe, which has: base 1, a plurality of shaping blocks 2, limit cover 3, expansion shaft 4 and cylinder 5. The base 1 is designed into a horizontal body, and a step with height difference is built on the base 1, the lower step surface is assembled with air compression equipment 7 to provide working air pressure, and the air compression equipment 7 increases the stability of the base 1. The higher step surface on the base 1 is provided with a supporting plane 11, and a through hole 12 is provided on the supporting plane 11. A plurality of shaping blocks 2 are installed on the supporting plane 11 of the base and are distributed around the through hole 12, so that the plurality of shaping blocks 2 form an expansion hole 21, and the expansion hole 21 is coaxial with the through hole 12; the shaping block 2 has a bottom disc 22 and an expansion part 23 protruding upward from the bottom disc, preferably the shaping block 2 is L-shaped, has a good center of gravity, and is beneficial to subsequent pipe expansion work. The limit cover 3 is installed on the supporting plane 11 of the base and covers the bottom disc 22 of the shaping block 2, and the expansion part 23 of the shaping block 2 protrudes upward from the pre-set middle hole 31 of the limit cover 3 and is used for inserting the pipe body needing shaping. The limit cover 3 is used for controlling the plurality of shaping blocks 2 to move in and out according to the set track, and the size of the middle hole 31 meets the expansion and contraction movement of the expansion part 23. The expansion shaft 4 is arranged on the base 1 and located on the lower side of the supporting plane 11, the expansion shaft 4 passes through the through hole 12 from top to bottom and is inserted into the expansion hole 21, the inner side wall of the expansion hole 21 is extruded by the expansion shaft 4, the plurality of shaping blocks 2 move synchronously and radially outward, the pipe expansion work of the expansion part 23 is realized, and the pipe body sleeved on the expansion part 23 is forced to round. After work, the expansion shaft 4 exits the expansion hole 21, the plurality of shaping blocks 2 synchronously move radially inward and reset, and the shaped pipe body can be removed.

[0026] In the embodiment, the expansion shaft 4 is vertically arranged, the lower end of the expansion shaft 4 is directly connected to the telescopic end of the cylinder 5, the cylinder 5 is fixed on the base 1 and provided with working air pressure by the air compression equipment 7, and drives the expansion shaft 4 to expand and contract, which is simple in structure, fast in action and large in power, and is beneficial to pipe expansion work. Further, the cylinder 5 is fixed on the supporting plate 13 inside the base 1 in a hanging mode, the cylinder 5 is coaxially arranged with the expansion shaft 4, and the movement of the expansion shaft 4 is effectively ensured to be stable and accurate.

[0027] In the embodiment, the plurality of shaping blocks 2 are enclosed and then two reset elastic members 6 are introduced and tied, the two reset elastic members 6 are tied on the bottom disc 22 and the expansion part 23 respectively, the rising and shrinking movement effect of the plurality of shaping blocks 2 is improved, and the plurality of shaping blocks 2 obtains automatic shrinking reset by the elastic force of the two reset elastic members 6. Further, the reset elastic member 6 is an elastic ring, such as a spring ring, and corresponding recessed receiving grooves 24 are arranged on the outer periphery of the bottom disc 22 and the expansion part 23 respectively, the reset elastic member 6 is correspondingly embedded in the recessed receiving groove 24, especially on the expansion part 23, the reset elastic member 6 is embedded and hidden, so as to avoid interference with the pipe expansion work, and the assembly structure is also beneficial to positioning assembly and improving connection stability.

[0028] In the embodiment, the limiting cover 3 is a circular ring body, and a radial inner protruding guide column 32 is further arranged on the limiting cover 3, the guide column 32 is correspondingly inserted into the radial guide hole 221 of the bottom disc 22 of the shaping block, and the guide column 32 and the radial guide hole 221 cooperatively guide the movement of the shaping block 2, so that the rising and shrinking movement of the shaping block 2 is stable and accurate. Specifically, the limiting cover 3 is locked on the support plane 11 of the machine base through a screw, so as to facilitate assembly, and the guide column 32 is implanted in the fixing hole of the limiting cover 3 and protrudes inward, so as to facilitate manufacturing and assembly.

[0029] In the embodiment, the entrance of the expanding hole 21 is designed as a flared mouth 211, and the upper end of the expanding shaft 4 is provided with a tapered head 41 matched with the flared mouth 211. The structure design is beneficial to alignment insertion and guidance, so that the expanding shaft 4 is inserted into the expanding hole 21 from top to bottom, the inner side wall of the expanding hole 21 is extruded, the plurality of shaping blocks 2 can be well synchronized with the radial outward movement, and the pipe expansion work of the expansion part 23 is facilitated.

[0030] The utility model discloses scientific, reasonable structure, low investment cost, through the expanding shaft insertion plurality of shaping blocks enclosed and formed expanding hole, make plurality of shaping blocks synchronous radial outward movement, realize the pipe expansion work of expansion part, after work, the expanding shaft exits the expanding hole, and plurality of shaping blocks synchronous radial in shrink reset, in order to next pipe expansion work. Realize mechanization automatic pipe expansion production, reduce the labor intensity, save time and effort, and production efficiency is high, is suitable for mass production, and quality is stable, and uniformity is good, and simultaneously can also save labor, avoid finding the predicament of not having a person to deal with, reduce manpower cost investment, help enterprise development.

[0031] Although the preferred embodiments of the present application have been described in detail above with reference to the accompanying drawings, the present application should not be limited to the structure and operation described above and shown in the drawings, and those skilled in the art can make many equivalent improvements and changes to the above embodiments without departing from the concept and scope of the present application through logical analysis, reasoning or limited experiments, but these improvements and changes should all belong to the scope of the present application.

Claims

1. A tube expander for shaping a bend of a muffler, characterized by, Has: The machine base (1) is provided with a support plane (11), and a through hole (12) is provided on the support plane (11); A plurality of shaping blocks (2) are installed on the support plane (11) of the machine base and are distributed around the through hole (12), so that the plurality of shaping blocks (2) enclose an opening (21), which is coaxially opposite to the through hole (12); The shaping block (2) has a chassis (22) and an expansion part (23) protruding upward from the chassis; The limiting cover (3) is installed on the support plane (11) of the machine base and covers the chassis (22) of the shaping block (2), and the expansion part (23) of the shaping block (2) protrudes upward from the limiting cover (3) The pre-set middle hole (31) protrudes upward; The limiting cover (3) is used for controlling the plurality of shaping blocks (2), so that the plurality of shaping blocks (2) move according to the set track; The opening shaft (4) is arranged on the machine base (1) and located on the lower side of the support plane (11), the opening shaft (4) passes through the through hole (12) from top to bottom and is inserted into the opening (21), so that the plurality of shaping blocks (2) move radially outward synchronously, realize the expansion part (23) The pipe expansion work; After work, the opening shaft (4) exits the opening (21), and the plurality of shaping blocks (2) are reset synchronously.

2. The tube expander for shaping a bend of a muffler according to claim 1, wherein The opening shaft (4) is vertically arranged, and the lower end of the opening shaft (4) is directly connected to the telescopic end of the air cylinder (5), and the air cylinder (5) is fixed on the machine base (1).

3. The tube expander for shaping a bend of a muffler according to claim 1, wherein The plurality of shaping blocks (2) are enclosed and introduced into two reset elastic members (6) for binding, and the two reset elastic members (6) are respectively bound on the chassis (22) and the expansion part (23).

4. The expander for shaping a muffler elbow according to claim 1 or 3, wherein The shaping block (2) is L-shaped.

5. The tube expander for shaping a bend of a muffler according to claim 1, wherein The limiting cover (3) is a circular ring body, and the limiting cover (3) is further provided with a radially inward protruding guide column (32), which is correspondingly inserted into the radially pre-set guide hole (221) of the chassis (22) of the shaping block, and the guide column (32) and the radially guide hole (221) cooperate to guide the movement of the shaping block (2).

6. The tube expander for shaping a bend of a muffler according to claim 5, wherein The limiting cover (3) is locked on the support plane (11) of the machine base by screws, and the guide column (32) is implanted in the pre-set fixing hole of the limiting cover (3) and protrudes inward.

7. The tube expander for shaping a bend of a muffler according to claim 2, wherein The air cylinder (5) is fixed on the support plate (13) inside the machine base (1) in a hanging form, and the air cylinder (5) is coaxially arranged with the opening shaft (4).

8. The tube expander for shaping a bend of a muffler according to claim 3, wherein The reset elastic member (6) is an elastic ring, and the outer periphery of the chassis (22) and the expansion part (23) is respectively provided with a corresponding recessed receiving groove (24), and the reset elastic member (6) is correspondingly embedded in the recessed receiving groove (24).

9. The tube expander for shaping a bend of a muffler according to claim 1, wherein The inlet of the opening (21) is designed as a trumpet mouth (211), and the upper end of the opening shaft (4) is provided with a tapered head (41) matched with the trumpet mouth (211).

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