Stamping die for conical surface heat preservation shell of tail gas catalytic converter

Abstract

The utility model provides a stamping die for a conical surface heat preservation shell of a tail gas catalytic converter, which can ensure that a processed raw material plate is not easy to incline, is easy to demould and improves the processing qualification rate of the heat preservation shell, and comprises a concave die body and a convex die body which are matched with each other for die assembly, the male die body is correspondingly provided with a forming male die plate, the forming female die seat and the forming male die plate are respectively provided with a forming female cavity and a forming convex block which correspond to each other, and the die is characterized in that the forming female cavity is provided with a through groove, an ejector is arranged in the through groove, and the ejector is connected with the forming female die seat. The top of the forming cavity, the top of the forming protruding block and the top of the ejector are respectively provided with a conical face forming face, when the female die body and the male die body are assembled, a conical face of the conical face heat preservation shell is formed through the conical face forming faces, and inclination angles which are the same in angle are formed between the conical axes of the conical face forming faces and the horizontal plane.

Description

TECHNICAL FIELD

[0001] The utility model relates to catalytic converter production equipment technical field, concretely relates to a stamping die of the conical surface heat preservation shell of tail gas catalytic converter. BACKGROUND

[0002] The outer cylinder of the diesel engine aftertreatment catalytic converter is wrapped by a heat preservation shell, and the heat preservation shell is adhered with a layer of heat preservation cotton to achieve the heat preservation effect requirement in a way similar to wearing a cotton-padded jacket.

[0003] The heat preservation shell usually adopts a two-piece structure to wrap the catalytic converter, and the heat preservation shell manufacturing process is to first carry out blanking, embossing and then forming on the plate material, and then welding the two-piece heat preservation shell on the outside of the catalytic converter.

[0004] The two-piece heat preservation shell in a straight cylinder type is easy to process, but since the heat preservation shell is arranged following the shape of the catalytic converter, the heat preservation shell at the end of the catalytic converter is a conical surface heat preservation shell 1, as shown in the figure. Figure 1 The original stamping die is prone to tilting during the stamping process when processing the conical surface heat preservation shell, and it is not easy to demold, thus resulting in a low qualified rate of the processed conical surface heat preservation shell. UTILITY MODEL CONTENTS

[0005] In view of the above problems, the utility model provides a stamping die of the conical surface heat preservation shell of tail gas catalytic converter, which can prevent the processing raw material plate from tilting and make it easy to demold, thereby improving the processing qualified rate of the heat preservation shell.

[0006] The technical scheme is as follows: a stamping die of the conical surface heat preservation shell of tail gas catalytic converter, comprising a concave die body and a convex die body matched with each other, the concave die body comprises a forming concave die seat, and a forming convex die plate is arranged on the convex die body correspondingly, characterized in that:

[0007] The forming concave die seat and the forming convex die plate are respectively provided with corresponding forming concave cavities and forming convex blocks, characterized in that a through groove is formed on the forming concave cavity, an ejector is arranged in the through groove, the forming concave cavity, the forming convex block and the top part of the ejector are respectively provided with conical surface forming surfaces, the conical surface of the conical surface heat preservation shell is formed by the conical surface forming surfaces when the concave die body and the convex die body are matched, and the conical shaft of the conical surface forming surface has an inclination angle same as that of the horizontal plane.

[0008] Further, the top part of the forming concave die seat is arranged as an object placing plane, a profiling limiting plate is arranged on the object placing plane, and the object placing plane and the profiling limiting plate cooperatively form a heat preservation shell raw material plate positioning cavity.

[0009] Further, the convex die body further comprises an upper die plate and an upper backing plate installed at the lower end of the upper die plate, and the forming convex die plate is installed at the lower end of the upper backing plate.

[0010] Furthermore, the punch body also includes guide rods. The upper template, the upper pad, and the forming die seat are respectively provided with guide rod grooves. A spring is provided in the guide rod groove. The guide rod is installed in the guide rod groove. The guide rods are respectively set on both sides of the insulation shell raw material plate to limit the insulation shell raw material plate.

[0011] Furthermore, the forming die plate is also provided with a die positioning block, which is located on the outside of the insulation shell raw material plate to limit the insulation shell raw material plate. The forming die base is provided with a positioning block groove corresponding to the die positioning block.

[0012] Furthermore, the concave mold body and the convex mold body are guided and closed by guide pillars and guide sleeves.

[0013] Furthermore, the die body also includes a lower template, and the forming die seat is disposed on the lower template.

[0014] Furthermore, the ejector includes a pressure block, the upper end of which is provided with the conical forming surface, and a support block, the support block being provided with a pressure block groove, the pressure block being installed in the pressure block groove, and a spring guide pin being provided between the support block and the pressure block.

[0015] Furthermore, the forming die holder is provided with fork feet on both sides.

[0016] The stamping die for the conical heat insulation shell of the exhaust gas catalyst of this utility model uses an ejector installed in a through groove on the forming cavity. The forming cavity, forming protrusion, and ejector are all topped with conical forming surfaces. The conical axis of the forming surface has a certain angle with the horizontal plane, ensuring that the conical surface of the finished heat insulation shell is horizontal or nearly horizontal in the forming cavity. This prevents the raw material sheet from tilting during stamping and makes demolding of the finished heat insulation shell smoother, allowing the ejector to easily eject the finished heat insulation shell. Furthermore, by setting a contour-guided limiting plate on the top of the forming die base and a punch positioning block and guide rod on the punch body, multi-directional positioning and limiting functions are provided during the stamping die closing process, ensuring the stability of the raw material sheet during forming and reducing scrap caused by positional deviation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a conical thermal insulation shell;

[0018] Figure 2 This is a perspective view of the stamping die for the conical heat insulation shell of an exhaust gas catalyst in one of the embodiments;

[0019] Figure 3A side view of a stamping die for a conical heat-insulating shell of an exhaust catalyst hidden behind a forming die seat

[0020] Figure 4 A top view of a stamping die for a conical heat-insulating shell of an exhaust catalyst in the embodiment

[0021] Figure 5 A side view of a stamping die for a conical heat-insulating shell of an exhaust catalyst hidden behind a forming die seat Figure 4 A sectional view of B-B direction

[0022] Figure 6 A sectional view of C-C direction Figure 4 A sectional view of C-C direction

[0023] Figure 7 A perspective view of a forming punch plate in the embodiment

[0024] Figure 8 A schematic view of a conical forming surface on a forming punch block in the embodiment having an inclination angle a with a horizontal plane

[0025] Figure 9 A schematic view of a heat-insulating shell raw material plate placed on a die body

[0026] Figure 10 A schematic view of a conical heat-insulating shell after being formed in a die body DETAILED DESCRIPTION

[0027] See Figures 2 to 10 , a stamping die for a conical heat-insulating shell of an exhaust catalyst in the embodiment, comprising a die body 100 and a punch body 200 matched with each other, the die body 100 comprising a forming die seat 101, the punch body 200 correspondingly comprising a forming punch plate 201,

[0028] The forming die seat 101 and the forming punch plate 201 respectively comprise corresponding forming cavities 102 and forming blocks 202, the forming cavities 102 and the forming blocks 202 cooperating to form a shape required by the conical heat-insulating shell, the forming cavities 102 being provided with through grooves 103 in the middle, the through grooves 103 being provided with ejectors 300, the forming cavities 102 and the forming blocks 202 and the top part of the ejectors respectively comprising conical forming surfaces 104, 203, 301, the conical forming surfaces 104, 203, 301 cooperating to form a conical surface of the conical heat-insulating shell when the die body 100 and the punch body 200 are matched, the conical axis of the conical surface where the conical forming surfaces 104, 203, 301 are located having an inclination angle same as that of a horizontal plane, the conical forming surfaces 104, 203, 301 being provided with a plurality of through holes 105, 204, 302 respectively, Figure 3 、 8It can be seen that, due to the inclination angle a between the conical surface forming surface and the horizontal surface, the conical surface of the conical surface insulation shell after processing is in a horizontal or nearly horizontal state in the forming cavity 102, so that the raw material plate is not easy to tilt during stamping, and the finished product of the insulation shell is more smooth when demolding, and the finished product of the conical surface insulation shell can be easily ejected by the ejector 300. The inclination angle range of the inclination angle is set according to the conical surface inclination of the conical surface insulation shell, and the conical surface of the conical surface insulation shell after processing is in a horizontal or nearly horizontal state in the forming cavity 102.

[0029] In the embodiment, the top part of the forming cavity, the forming protrusion and the ejector are respectively provided with a conical surface forming surface, the conical shaft of the conical surface forming surface has a certain inclination angle with the horizontal surface, so that the conical surface of the conical surface insulation shell after processing is in a horizontal or nearly horizontal state in the forming cavity, so that the raw material plate is not easy to tilt during stamping, and the finished product of the insulation shell is more smooth when demolding, and the ejector easily ejects the finished product of the insulation shell.

[0030] In an embodiment of the utility model, the top of forming cavity seat 104 is set to be article placing plane 105, article placing plane 105 is provided with profiling limiting plate 106, profiling limiting plate 106 is respectively arranged at both sides of article placing plane 105, and article placing plane 105 and profiling limiting plate 106 cooperate to constitute insulation shell raw material plate positioning cavity. By setting article placing plane and profiling limiting plate on the cavity seat, the positioning cavity of the raw material plate is formed, the position of the plate before stamping is effectively limited, and the position deviation in the stamping process is prevented.

[0031] In an embodiment, the male die body 200 further includes an upper die plate 204 and an upper pad plate 205 mounted at the lower end of the upper die plate 204, the forming male die plate 201 is mounted at the lower end of the upper pad plate 205, and the male die body further includes a guide rod 206. The upper die plate 204, the upper pad plate 205 and the forming female die seat 201 are respectively provided with guide rod grooves, springs 208 are arranged in the guide rod grooves, and the guide rod 206 is mounted in the guide rod grooves. The guide rod 206 is arranged at both sides of the insulation shell raw material plate 2 to limit the insulation shell raw material plate 2. The guide rod 206 can limit the stress inclination of the insulation shell in the later stage of insulation shell forming and avoid displacement of the insulation shell. The upper end surface of the guide rod is provided with a spring, and the spring is contracted under stress when the guide rod contacts the forming female die seat 101 to avoid interference.

[0032] In one embodiment, the forming punch plate 201 is further provided with a punch positioning block 207, which is located outside the outer shell raw material plate 2 to limit the outer shell raw material plate 2. The forming concave die seat 101 is provided with a positioning block groove 107 corresponding to the punch positioning block 207. In the initial stage of forming the conical outer shell 1, the conical outer shell 1 is limited from tilting under stress, thereby avoiding displacement of the conical outer shell 1.

[0033] By providing a profiling limiting plate on the top of the forming concave die seat, and providing a punch positioning block and a guide rod on the punch body, multi-directional positioning and limiting functions are provided during the stamping die closing process, which ensures the stability of the raw material plate during the forming process and reduces the waste caused by position deviation.

[0034] In one embodiment, the concave die body 100 and the punch body 200 are guided and closed by the guide column 108 and the guide sleeve 109, which ensures accurate guidance during die closing and helps to improve the repeat accuracy of the product and the service life of the die. The concave die body 100 further includes a lower die plate 111, and the forming concave die seat 101 is arranged on the lower die plate 111.

[0035] In one embodiment, the ejector includes a pressure block 302 provided with a conical forming surface 301 on the upper end, and a support block 303 provided with a pressure block groove 304, and the pressure block 302 is installed in the pressure block groove 304. A spring guide pin 305 is arranged between the support block 303 and the pressure block.

[0036] In the embodiment, the ejector contacts the raw material plate and helps forming; and the spring guide pin ensures the stability and reliability of the action of the ejector. When the die is opened, the spring pushes the pressure block to rise, and the formed conical outer shell is ejected from the die, completing the demolding process. This design effectively overcomes the demolding difficulty of the thin-walled conical outer shell, improves the production efficiency and the qualification rate of the product.

[0037] In one embodiment, the forming concave die seat is provided with fork legs 110 on both sides, which facilitates the installation and disassembly of the die.

[0038] The working process of the stamping die of the conical outer shell of the exhaust catalyst in the embodiment is described as follows: during work, the raw material plate before forming is placed on the concave die and positioned by the positioning cavity of the placement plane and the profiling limiting plate. The punch body is started to be lowered to contact the workpiece. At this time, the ejector holds the raw material plate from below, and the punch positioning plate blocks the raw material plate to prevent the workpiece from tilting and displacing. The punch continues to descend, and at this time, the workpiece is completely separated from the raw material plate positioning cavity on both sides. At this time, the guide rod provides forward and backward limiting to prevent displacement of the raw material plate. Finally, the upper and lower dies are closed to form the conical outer shell. After the die is opened, the formed conical outer shell is ejected by the ejector, and the work is completed.

[0039] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being defined by the appended claims rather than the above description, and all changes falling within the meaning and range of equivalents of the claims are therefore intended to be embraced therein.

[0040] Furthermore, it should be understood that, although the present specification is described according to the embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments which can be understood by a person skilled in the art.

Claims

1. A punch die for a conical heat-insulating shell of a tail gas catalytic converter, comprising a female die body and a male die body that mate with each other, the female die body comprising a forming female die seat, and the male die body being provided with a forming male die plate thereon, characterized in that: the forming female die seat and the forming male die plate are respectively provided with a corresponding forming female cavity and a forming male block, the forming female cavity is provided with a through groove, and an ejector is arranged in the through groove, and the forming female cavity, the forming male block, and a top part of the ejector are respectively provided with a conical surface forming surface, a conical surface of the conical heat-insulating shell is formed by the conical surface forming surface when the female die body and the male die body are mated, and a conical axis of the conical surface forming surface has an inclination angle that is the same as that of a horizontal plane. A top part of the forming female die seat is provided as a placement plane, the placement plane is provided with a profiling limiting plate, and the placement plane and the profiling limiting plate cooperatively form a positioning cavity for a raw material plate of the heat-insulating shell.

2. The stamping die of the conical heat-insulating shell of a tail gas catalyst according to claim 1, characterized in that: The male die body further comprises an upper die plate and an upper backing plate mounted at a lower end of the upper die plate, and the forming male die plate is mounted at a lower end of the upper backing plate.

3. The stamping die of the conical heat-insulating shell of a tail gas catalyst according to claim 1, characterized in that: The male die body further comprises a guide rod, the upper die plate, the upper backing plate, and the forming female die seat are respectively provided with guide rod grooves, springs are arranged in the guide rod grooves, the guide rod is mounted in the guide rod grooves, and the guide rod is arranged at two sides of the raw material plate of the heat-insulating shell to limit the raw material plate of the heat-insulating shell.

4. The stamping die of the conical heat-insulating shell of a tail gas catalyst according to claim 3, characterized in that: The forming male die plate is further provided with a male die positioning block, the male die positioning block is located at an outer side of the raw material plate of the heat-insulating shell to limit the raw material plate of the heat-insulating shell, and the forming female die seat is provided with a positioning block groove corresponding to the male die positioning block.

5. The stamping die for the conical heat-insulating shell of a catalytic converter according to claim 4, characterized in that: The female die body and the male die body are guided and mated by a guide column and a guide sleeve.

6. The stamping die of the conical heat-insulating shell of a tail gas catalyst according to claim 1, characterized in that: The female die body further comprises a lower die plate, and the forming female die seat is arranged on the lower die plate.

7. The stamping die of the conical heat-insulating shell of a tail gas catalyst according to claim 1, characterized in that: The ejector comprises a pressing block, the conical surface forming surface is arranged at an upper end of the pressing block, and the ejector further comprises a supporting block, the supporting block is provided with a pressing block groove, the pressing block is mounted in the pressing block groove, and a spring guide pin is arranged between the supporting block and the pressing block.

8. The stamping die of the conical heat-insulating shell of a tail gas catalyst according to claim 1, characterized in that: The forming female die seat is provided with fork legs at two sides thereof.

9. The stamping die for the conical heat-insulating shell of a catalytic converter according to claim 1, characterized in that: ​

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