CN113145711A

CN113145711A - Punch forming equipment for silencer shell

Info

Publication number: CN113145711A
Application number: CN202110394031.XA
Authority: CN
Inventors: 胡旋; 陈末良; 黄勇; 孙合理
Original assignee: Shanghai Gangwang Industrial Co ltd
Current assignee: Shanghai Gangwang Industrial Co ltd
Priority date: 2021-04-13
Filing date: 2021-04-13
Publication date: 2021-07-23

Abstract

The invention relates to the field of mechanical equipment, and discloses punch forming equipment for a silencer shell. The press molding apparatus of the present invention includes: base, lower mould, last mould, fixing base and supporting mechanism, lower mould and fixing base setting are on the base, and supporting mechanism includes: back shaft, push rod and second actuating mechanism, back shaft setting are on the fixing base, and the back shaft is equipped with the support passageway that runs through, and the push rod is connected with second actuating mechanism, and push rod slidable wears to establish in the support passageway of back shaft. According to the punch forming equipment, the cylinder main body of the silencer shell is sleeved on the supporting shaft, the push rod extends into the supporting channel of the supporting shaft to enable the supporting shaft to expand, the circumferential side wall of the supporting shaft abuts against the inner wall of the cylinder main body to effectively support the cylinder main body of the silencer shell, the upper die and the lower die are matched to enable the side lugs to be punched and formed, the cylinder main body of the silencer shell cannot deform, and the forming yield of the silencer shell is improved.

Description

Punch forming equipment for silencer shell

Technical Field

The embodiment of the invention relates to the field of mechanical equipment, in particular to punch forming equipment for a silencer shell.

Background

The silencer is a noise reduction device for a gas flow pipeline with noise transmission, such as a pipeline and an elbow with sound absorption linings or a pipeline with suddenly changed sectional area and other discontinuous acoustic impedances, and the like, so that the noise in the pipeline is attenuated or emitted back.

The automobile silencer is used for reducing noise generated when an engine works, a silencer shell of the automobile silencer comprises a cylinder main body and side lugs, and the side lugs on two sides of the cylinder main body are formed by punching.

However, when the side lugs of the silencer shell in the prior art are subjected to punch forming, the cylinder main body of the silencer shell is easy to deform, and the yield of the silencer shell is reduced.

Disclosure of Invention

The invention aims to provide a punch forming device of a silencer shell, which aims to solve the problem of deformation of a cylinder body of the silencer shell in the background technology.

The embodiment of the invention provides punch forming equipment for a silencer shell, which comprises: the device comprises a base, a lower die, an upper die, a fixed seat and a supporting mechanism;

the base is used for fixing;

the lower die and the fixed seat are arranged on the base, and the lower die is provided with a first cavity;

the upper die is arranged above the lower die and is connected with a first driving mechanism, and the upper die is provided with a second cavity;

the support mechanism includes: the supporting shaft, the push rod and the second driving mechanism;

the support shaft is horizontally arranged on the fixed seat and positioned between the first cavity and the second cavity, the support shaft is provided with a support channel which penetrates through the support shaft, and the support shaft is used for sleeving a shell of the silencer;

the push rod is connected with the second driving mechanism, the push rod can be slidably arranged in the support channel in a penetrating mode, the second driving mechanism is used for driving the push rod to stretch into and withdraw from the support channel, and the push rod is used for opening the support shaft when stretching into the support channel so that the support shaft is abutted to the inner wall of the silencer shell;

the first driving mechanism is used for driving the upper die to be close to and far away from the lower die, and the upper die is used for punching and sleeving a silencer shell on the supporting shaft when being close to the lower die.

Based on the above scheme, the stamping forming equipment for the silencer shell provided by the invention is provided with the base, the lower die, the upper die, the fixed seat and the supporting mechanism, wherein the supporting mechanism comprises: back shaft, push rod and second actuating mechanism, the setting of back shaft horizontally is on the fixing base, and the back shaft is equipped with the support passageway that runs through, and the push rod is connected with second actuating mechanism, and push rod slidable wears to establish in the support passageway of back shaft. According to the stamping forming equipment for the silencer shell, the cylinder main body of the silencer shell is sleeved on the supporting shaft, the second driving mechanism drives the push rod to extend into the supporting channel of the supporting shaft to expand the supporting shaft, the circumferential side wall of the supporting shaft abuts against the inner wall of the cylinder main body to effectively support the cylinder main body of the silencer shell, the first driving mechanism drives the upper die to press downwards, the upper die and the lower die are matched to punch form the side lugs of the silencer shell, the cylinder main body of the silencer shell cannot deform, and the yield of the silencer shell is improved.

In one possible embodiment, the method further comprises: a limiting seat;

the limiting seat is arranged on the fixed seat;

the back shaft is worn to establish spacing seat is last, the back shaft includes: a plurality of segments;

the supporting shaft is formed by splicing the plurality of fan-shaped blocks, a protruding edge is arranged at one end of each fan-shaped block, and the protruding edge is arranged in the limiting seat.

In a possible solution, the fixing seat is provided with a rectangular groove;

the limiting seat is clamped in the rectangular groove and is abutted against the lower die.

In one possible solution, the stopping block comprises: a first limiting block, a second limiting block and a third limiting block;

the first limiting block and the third limiting block are respectively arranged at two sides of the second limiting block, and the first limiting block is arranged close to the fixed seat;

the inner hole of the second limiting block is larger than the inner holes of the first limiting block and the third limiting block, and a first sliding groove is formed between the first limiting block and the third limiting block;

the protruding edge is slidably clamped in the first sliding groove.

In a feasible scheme, the bore diameter of the inner bore of the third limiting block corresponds to the outer diameter of the silencer;

the fan-shaped block is provided with a step convex ring, the height of the step convex ring corresponds to the wall thickness of the silencer, and the limiting convex ring is used for limiting the sliding of the fan-shaped block when being abutted against the third limiting block.

In a possible scheme, the end face of the sector block is provided with a second sliding chute;

the end face of the first limiting block is provided with a sliding strip, and the sliding strip is embedded into the second sliding groove, so that the fan-shaped block slides along the sliding strip.

In one possible embodiment, the method further comprises: a first return spring;

the side wall of the protruding edge is provided with a first clamping groove, and the reset spring is clamped in the first clamping groove of the protruding edge and used for enabling the fan-shaped blocks to reset.

In one possible embodiment, the method further comprises: a second return spring;

the other end of the fan-shaped block is provided with a protruding block, and the protruding block is provided with a second clamping groove;

the second return spring is clamped in the second clamping groove.

In one possible solution, the support channel is conical;

the push rod is in a conical shape matched with the supporting channel.

In one possible embodiment, the method further comprises: a guide bar;

the upper die is provided with a guide hole;

the guide rod is arranged on the lower die and penetrates through the guide hole, so that the lower die can move up and down along the guide rod;

and the first cavity and the second cavity are both arc-shaped and matched with the shell of the silencer.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of a muffler shell according to the present invention;

FIG. 2 is a schematic view of a punch forming apparatus of a muffler shell in an embodiment of the present invention;

FIG. 3 is a schematic view of the mounting of the support shaft in an embodiment of the present invention;

FIG. 4 is a schematic view of a position-limiting base according to an embodiment of the invention;

FIG. 5 is an enlarged view of the portion A of FIG. 4 in an embodiment of the present invention;

FIG. 6 is a schematic view of a support mechanism in an embodiment of the invention;

fig. 7 is a schematic view of a support shaft in an embodiment of the present invention.

Reference numbers in the figures:

1. a muffler housing; 11. a cylindrical body; 12. a lateral ear; 2. a base; 31. a lower die; 311. a first cavity; 32. an upper die; 321. a second cavity; 322. a guide hole; 4. a fixed seat; 41. a rectangular groove; 5. a support mechanism; 51. a support shaft; 511. a sector block; 5111. a raised edge; 5112. a step convex ring; 5113. a second chute; 5114. a first card slot; 5115. a protruding block; 5116. a second card slot; 52. a push rod; 6. a limiting seat; 61. a first stopper; 62. a second limiting block; 63. and a third limiting block.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the indicated orientations and positional relationships based on the drawings for convenience in describing and simplifying the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication connection; either directly or indirectly through intervening media, either internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

As described in the background of the present application, a muffler for an automobile is to reduce noise generated when an engine operates, and a muffler shell of the muffler for an automobile includes a cylindrical body and side lugs, the side lugs are located at both sides of the cylindrical body, and the side lugs at both sides are formed by a punching apparatus.

The inventor of the application finds that in the prior art, when the side lug of the silencer shell is formed by punching, the cylinder main body of the silencer shell is easy to deform, and the yield of the silencer shell is reduced.

In order to solve the above problems, the inventor of the present application proposes a technical solution of the present application, and specific embodiments are as follows:

fig. 1 is a schematic view of a muffler shell according to the present invention, fig. 2 is a schematic view of a press forming apparatus of the muffler shell according to the present invention, fig. 3 is a schematic view of mounting a support shaft according to the present invention, fig. 4 is a schematic view of a stopper seat according to the present invention, fig. 5 is an enlarged view of a point a in fig. 4 according to the present invention, fig. 6 is a schematic view of a support mechanism according to the present invention, and fig. 7 is a schematic view of the support shaft according to the present invention.

As shown in fig. 1, a muffler shell 1 of the present invention includes: the cylinder body 11 and the side ear 12, side ear 12 lays in the circumference both sides of cylinder body 11, and side ear 12 is through stamping forming of stamping equipment.

As shown in fig. 2 to 7, the punch forming apparatus of the muffler shell of the present embodiment includes: base 2, lower mould 31, last mould 32, fixing base 4 and supporting mechanism 5.

The base 2 is fixedly arranged on a machine table of the stamping equipment.

The lower die 31 and the fixing seat 4 are fixedly arranged on the base 2, the fixing seat 4 is positioned on one side of the lower die 31, and a first cavity 311 is arranged on the top surface of the lower die 31.

The upper die 32 is disposed above the lower die 31, the upper die 32 is connected to a first driving mechanism (not shown) of the stamping device, the first driving mechanism drives the upper die 32 to move up and down, so that the upper die 32 is close to and/or far away from the lower die 31, and a second cavity 321 is disposed at the bottom of the upper die 32.

The support mechanism 5 includes: a support shaft 51, a push rod 52 and a second drive mechanism.

The supporting shaft 51 is horizontally disposed, one end of the supporting shaft 51 is disposed on the fixing base 4, and the supporting shaft 51 is located between the first cavity 311 of the lower die 31 and the second cavity 321 of the upper die 32. The inside of back shaft 5 is equipped with the support channel that runs through about, and the axis of support channel sets up with the axis coincidence of back shaft 51, and the aperture of support channel is less than the external diameter of push rod 52.

A second driving mechanism (not shown in the figures) is disposed on a side of the base 2 away from the lower die 31, one end (left end) of the push rod 52 is connected to the second driving mechanism, the push rod 52 slidably penetrates through the support channel of the support shaft 51, and the outer diameter of the push rod 52 is larger than the aperture of the support channel of the support shaft 51. The second driving mechanism drives the push rod 52 to move left and right, so that the push rod 52 extends into and/or exits from the supporting channel of the supporting shaft 51. In this embodiment, the first and second drive mechanisms are preferably hydraulic cylinders,

the stamping forming equipment of this embodiment, during the use, the drum main part of muffler shell cup joints on the back shaft, and second actuating mechanism drives the push rod and removes, and the push rod makes the back shaft strut the inflation when stretching into the support channel of back shaft, and the circumference outer wall of back shaft offsets with the inner wall of drum main part and holds, provides the support for the drum main part of muffler shell. The first driving mechanism drives the upper die to move downwards, the upper die and the lower die are matched to punch and form the side lugs on two sides of the silencer shell, and the cylinder main body of the silencer shell cannot deform.

Through the discovery that it is not difficult for above-mentioned content, the stamping forming equipment of the muffler shell of this embodiment through setting up base, lower mould, last mould, fixing base and supporting mechanism, and supporting mechanism includes: back shaft, push rod and second actuating mechanism, the setting of back shaft horizontally is on the fixing base, and the back shaft is equipped with the support passageway that runs through, and the push rod is connected with second actuating mechanism, and push rod slidable wears to establish in the support passageway of back shaft. The stamping forming equipment of the muffler shell of this embodiment, the drum main part of muffler shell cup joints on the back shaft, second actuating mechanism drives the push rod and stretches into in the support passageway of back shaft, make the back shaft strut the inflation, the circumference lateral wall of back shaft offsets with the inner wall of drum main part and holds, provide effective support to the drum main part of muffler shell, first actuating mechanism drives and goes up the mould and push down, it makes the side ear stamping forming of muffler shell to go up mould and lower mould cooperation, the drum main part of muffler shell can not warp, the yield of muffler shell has been improved.

Optionally, as shown in fig. 3, 4, and 5, the punch forming apparatus for a muffler shell according to this embodiment further includes: and a limiting seat 6.

Spacing seat 6 sets up on fixing base 4, and spacing seat 6 is equipped with the hole that supplies push rod 52 and back shaft 51 to pass, and the hole aperture of spacing seat 6 is greater than the external diameter of back shaft 51.

The support shaft 51 includes: a plurality (eight) of segments 511.

The supporting shaft 51 is formed by splicing the plurality of the fan-shaped blocks 511, a supporting channel of the supporting shaft is formed in the middle of the spliced plurality of the fan-shaped blocks 511, a protruding edge 5111 is arranged at one end part of each fan-shaped block 511, which is close to the fixed seat 4, the end part of each fan-shaped block 511 is arranged in an inner hole of the limiting seat 6 in a penetrating mode, the protruding edge 5111 on each fan-shaped block 511 is arranged in the limiting seat 6, and when the push rod 52 extends into the supporting channel of the supporting shaft 51, the supporting shaft 51 can expand and expand in the inner hole of the limiting seat 6.

Further, in the punch forming apparatus for a muffler shell according to the present embodiment, a rectangular groove 41 is formed in a side of the fixing base 4 close to the lower die 31.

The limiting seat 6 is clamped in the rectangular groove 41 of the fixing seat 4, and the outer side surface of the limiting seat 6 is abutted against the side surface of the lower die 31, so that the limiting seat is more stable.

Further, stamping forming equipment of muffler shell in this embodiment, spacing seat 6 includes: a first stopper 61, a second stopper 62 and a third stopper 63.

The first limiting block 61 and the third limiting block 63 are arranged on two sides of the second limiting block 62 in mirror symmetry, and the first limiting block 61 is arranged close to the side face of the fixed seat 4. The inner hole aperture of the second limiting block 62 is larger than the inner hole apertures of the first limiting block 61 and the third limiting block 63, and a first sliding groove is formed between the end face of the first limiting block 61, the end face of the third limiting block 63 and the inner wall of the inner hole of the second limiting block 62.

The protruding edges 5111 of the ends of the plurality of segments 511 of the supporting shaft 51 are slidably engaged in the first sliding slot between the first stopper 61 and the third stopper 63, and when the supporting shaft 51 is spread, the protruding edges 5111 of the segments slide in the first sliding slot.

Further, in the punching forming device of the muffler shell in this embodiment, the hole diameter of the inner hole of the third limiting block 63 corresponds to the outer diameter of the cylinder main body 11 of the muffler shell.

The segment 511 is provided with a stepped convex ring 5112 near the projecting edge 5111, and the height of the stepped convex ring 5112 corresponds to the wall thickness of the cylindrical body 11 of the muffler case. The push rod extends into the supporting channel of the supporting shaft under the driving of the second driving mechanism, the fan-shaped block slides outwards to be expanded, when the circumferential side wall of the fan-shaped block abuts against the inner wall of the cylinder main body and the step convex ring 5112 of the fan-shaped block abuts against the inner hole wall of the third limiting block 61, the third limiting block 61 limits the fan-shaped block, so that the fan-shaped block stops expanding outwards, and the cylinder main body of the silencer shell is prevented from being damaged.

Further, as shown in fig. 6, in the punch forming apparatus for a muffler shell in the present embodiment, the end face of the segment 511 is provided with a second sliding groove 5113.

The end surface of the first stopper 61 is provided with a plurality of sliding bars (not shown in the figure) corresponding to the second sliding grooves 5113 of the plurality of segments 511. The second sliding grooves 5113 of the end surfaces of the plurality of segments 511 are inserted into the plurality of sliding strips of the first limiting block 61, so that the segments are spread or retracted along the sliding strips of the first limiting block.

Further, the stamping forming equipment of muffler shell in this embodiment still includes: a first return spring.

A first locking groove 5114 is arranged on a circumferential side wall of the protruding edge 5111 at the end of the fan-shaped block 511, a first return spring (not shown in the figure) is sleeved on the circumferential side wall formed by splicing the plurality of fan-shaped blocks 511, and the first return spring is embedded in the first locking groove 5114 of the protruding edge 5111. When the push rod 52 extends into the supporting channel of the supporting shaft 52, the first return spring is stretched; when the push rod is withdrawn from the support shaft, the multiple fan-shaped blocks can be quickly reset under the action of the first reset spring.

Further, as shown in fig. 5, the apparatus for punch forming a muffler shell in this embodiment further includes: a second return spring.

The fan-shaped protruding blocks 5115 are arranged at the end parts of the fan-shaped blocks 511 far away from the protruding edges 5111, the protruding blocks 5115 are arranged close to the inner sides of the fan-shaped blocks 511, and second clamping grooves 5116 are formed between the protruding blocks 5115 and the end faces of the fan-shaped blocks 511.

The second reset spring (not shown in the figure) is sleeved on the circumferential side wall spliced by the plurality of the protruding blocks 5115, the second reset spring is clamped in the second clamping groove 5116 of the protruding block 5115, when the push rod exits from the supporting shaft, the plurality of fan-shaped blocks can be quickly and stably reset under the action of the first reset spring and the second reset spring, and the formed silencer shell can be conveniently taken out from the supporting shaft.

Further, as shown in fig. 7, in the press forming apparatus of the muffler shell in the present embodiment, the support passage inside the support shaft 51 is formed in a conical shape.

The push rod 52 is also tapered, and the taper of the push rod 52 is identical to that of the support passage of the support shaft 51. After the push rod stretches into the supporting channel of the supporting shaft, the circumferential side wall of the push rod is completely attached to the hole wall of the supporting shaft, so that the supporting shaft is better supported.

Optionally, the stamping forming equipment of muffler shell in this embodiment further includes: a guide rod.

Four corners of the upper die 32 are provided with guide holes 322.

Guide rods (not shown) are arranged at four top corners of the lower die 31, and the guide rods are slidably inserted into guide holes of the upper die, so that the upper die moves up and down along the guide rods.

And the first die cavity 311 of lower mould and the second die cavity 321 of last mould all are half circular arc, and the circular arc radian of first die cavity 311 and second die cavity 321 and the circular arc radian adaptation of the drum main part of muffler shell, and during the side ear stamping forming of muffler shell, first die cavity and second die cavity provide the support with the drum main part cladding of muffler shell, lower mould and the circumference lateral wall of mould for the drum main part. The cylinder body of the muffler shell is more stable and does not deform.

In the present invention, unless otherwise explicitly specified or limited, the first feature "on" or "under" the second feature may be directly contacting the first feature and the second feature or indirectly contacting the first feature and the second feature through an intermediate.

Also, a first feature "on," "above," and "over" a second feature may mean that the first feature is directly above or obliquely above the second feature, or that only the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lower level than the second feature.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples," or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a stamping forming equipment of muffler shell which characterized in that includes: the device comprises a base, a lower die, an upper die, a fixed seat and a supporting mechanism;

the base is used for fixing;

2. The apparatus for punch forming of a muffler shell according to claim 1, further comprising: a limiting seat;

the limiting seat is arranged on the fixed seat;

3. The punch forming apparatus of the muffler shell according to claim 2, wherein the holder is provided with a rectangular groove;

4. The punch forming apparatus of a muffler shell according to claim 3, wherein the stopper seat includes: a first limiting block, a second limiting block and a third limiting block;

the protruding edge is slidably clamped in the first sliding groove.

5. The punch forming equipment for the silencer shell according to claim 4, wherein the bore diameter of the inner bore of the third limiting block corresponds to the outer diameter of the silencer;

6. The punch forming apparatus of the muffler shell according to claim 4, wherein the end face of the sector is provided with a second sliding groove;

7. The apparatus of claim 6, further comprising: a first return spring;

8. The apparatus of claim 6, further comprising: a second return spring;

the second return spring is clamped in the second clamping groove.

9. The apparatus of claim 2, wherein the support channel is conical in shape;

the push rod is in a conical shape matched with the supporting channel.

10. The apparatus for punch forming of a muffler shell according to claim 1, further comprising: a guide bar;

the upper die is provided with a guide hole;