CN216324882U

CN216324882U - Large-scale stainless steel flange forges mould

Info

Publication number: CN216324882U
Application number: CN202122823483.3U
Authority: CN
Inventors: 尹晓东; 姜星智; 穆剑菲; 江一波; 陈望
Original assignee: SUZHOU KUNLUN HEAVY EQUIPMENT MANUFACTURING CO LTD
Current assignee: SUZHOU KUNLUN HEAVY EQUIPMENT MANUFACTURING CO LTD
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-04-19
Anticipated expiration: 2031-11-17

Abstract

The utility model relates to a large stainless steel flange forging die which is provided with an upper backing plate and a lower backing plate, wherein an upper circular plate is arranged at the center of the bottom of the upper backing plate, and an upper punch is arranged at the center of the bottom of the upper circular plate; an outer die ring is arranged at the center of the top of the lower base plate, and a die cavity is arranged at the center of the top of the outer die ring; the die cavity consists of an extension cavity and a main die cavity; the outer mould ring bottom center is provided with the lower plectane joint portion that communicates from top to bottom with the master mould chamber, is provided with down the plectane in the plectane joint portion down, plectane center is provided with pre-buried chamber down, is provided with the identical and anastomotic material returned device of size of its shape in this pre-buried intracavity, the position that corresponds material returned device bottom on the lower bolster is provided with the material returned linkage hole that communicates from top to bottom. The large stainless steel flange forging die can forge and press stainless steel bars into forging blanks with structural shapes close to the flange shapes, machining allowance is small during later machining, cost is saved, machining efficiency is improved, and machining quality of flange forgings can be guaranteed.

Description

Large-scale stainless steel flange forges mould

Technical Field

The utility model relates to the field of flange manufacturing, in particular to a large stainless steel flange forging die.

Background

The flange is also called a flange collar or flange. Flanges are parts for interconnecting pipes and are used for connecting pipe ends, and flanges are used for connecting equipment inlets and outlets and are used for connecting two pieces of equipment, such as speed reducer flanges.

At present, a plurality of large-scale equipment can be applied to flange connection, such as flanges used for connecting petroleum and chemical pipelines, and the flanges have larger volume, so the processing difficulty is also larger. The existing flange processing can be divided into forging, welding and machining modes according to the processing mode.

The forged flange is processed by a free forging processing mode; the free forging has low precision, large machining allowance, high labor intensity and low production rate, so the method is only suitable for single-piece and small-batch production, and the blank is easy to be eccentric and affects the quality.

The welding flange has higher requirement on the welding process, the labor intensity of workers is high, and the improper welding easily causes the desoldering and influences the quality of products; and the welding point of the welding flange is not properly rusted, so that the service life and the safety are influenced. Most of the existing flanges are made of stainless steel and mainly used for preventing rust, so that the welding flange is flexible to process but not suitable for being used in the field with high rust prevention requirements.

The machining integrated flange is suitable for machining production of small flanges, the machining allowance of products is large, clamping is inconvenient to process large flanges, and machining cost is high.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a large stainless steel flange forging die which is good in blank making effect and small in later-stage finish machining allowance.

In order to solve the technical problems, the utility model is realized by the following technical scheme: a large stainless steel flange forging die is provided with an upper base plate and a lower base plate which correspond up and down, wherein an upper circular plate is fixedly arranged at the center of the bottom of the upper base plate, an upper punch is fixedly arranged at the center of the bottom of the upper circular plate and protrudes downwards below the bottom of the upper circular plate, and an extrusion forming part for die forging forming of a flange center hole is formed in the part, protruding downwards below the bottom of the upper circular plate, of the upper punch; an outer die ring is fixedly arranged at the center of the top of the lower base plate, a die cavity for forming a flange forging is arranged at the center of the top of the outer die ring, and the upper punch vertically corresponds to the die cavity; the die cavity consists of an extension cavity and a main die cavity which are communicated with each other from top to bottom, the diameter of the extension cavity is larger than that of the main die cavity, the diameter of the main die cavity is larger than the maximum diameter of the upper punch, and the upper punch can extend downwards into the main die cavity; the outer die ring bottom center be provided with the lower plectane joint portion of main die cavity intercommunication from top to bottom, be provided with in the plectane joint portion down rather than the identical lower plectane of structure and size, the center of plectane is provided with the pre-buried chamber of "T" type of intercommunication from top to bottom down, and the activity is provided with rather than the identical and size anastomotic "T" type material returned device of shape in this pre-buried intracavity, the position that corresponds material returned device bottom on the lower bolster is provided with intercommunication from top to bottom and rather than cup jointing complex material returned joint hole.

Furthermore, the bottom of the upper circular plate is provided with a limiting hole which is in sleeve fit with the top of the upper punch; the bottom of the outer die ring is provided with a downward limiting bulge, and the top of the lower backing plate is provided with an outer die limiting cavity which is in up-down sleeve joint fit with the limiting bulge.

Furthermore, the material returning device is composed of a top head and a top rod which are connected up and down, the top head and the top rod are connected together through threads, the top surface of the top head of the material returning device sleeved in the embedded cavity is flush with the top surface of the lower circular plate, and the bottom of the top rod penetrates through the embedded cavity and the material returning connection hole downwards in sequence and extends below the bottom surface of the lower base plate.

Further, the distance h between the bottom surface of the ejector rod and the bottom surface of the lower backing plate is 35 mm.

Furthermore, the lower circular plate joining part is funnel-shaped, the aperture of the top part of the lower circular plate joining part is larger than that of the bottom part of the lower circular plate joining part, and the aperture of the top part of the lower circular plate joining part is the same as that of the main die cavity.

Furthermore, the external diameter of the extrusion molding part is gradually reduced from top to bottom, and the corner between the outer peripheral surface and the bottom surface is a fillet.

Further, corners between the extension cavity and the main mold cavity are rounded.

Furthermore, the upper punch and the upper circular plate, the upper circular plate and the upper backing plate and the outer die ring and the lower backing plate are fixedly connected together through the inner hexagon bolts.

Furthermore, the left side and the right side of the upper backing plate are symmetrically provided with a plurality of upper positioning grooves which are the same in interval and are communicated from top to bottom, and the left side and the right side of the lower backing plate are symmetrically provided with a plurality of lower positioning grooves which are the same in interval and are communicated from top to bottom.

Further, a zero point position H is arranged between the bottom surface of the upper backing plate and the top surface of the outer die ring, and the zero point position H is 105 mm.

Compared with the prior art, the utility model has the advantages that: the large stainless steel flange forging die can forge and press a stainless steel bar into a forging blank with a structural shape close to the shape of the flange, the machining allowance is small during later rough machining and finish machining, the cost is saved, the machining efficiency is improved, centering is easy to occur during forging, the problem of eccentric forging is not easy to cause, and the machining quality of the flange forging is ensured.

Drawings

The utility model is further described below with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of a large stainless steel flange forging die in a top view;

FIG. 2 is a cross-sectional view of the structure A-A of FIG. 1;

fig. 3 is a schematic illustration of the split structure of fig. 2.

In the figure: 1. an upper base plate; 11. an upper positioning groove; 2. a lower base plate; 21. a lower positioning groove; 22. an outer die limiting cavity; 23. a material returning jointing hole; 3. an outer mold ring; 31. a main mold cavity; 32. an extension cavity; 33. a limiting bulge; 34. a lower circular plate joining part; 4. an upper circular plate; 41. a limiting hole; 5. an upper punch; 6. a lower circular plate; 61. pre-embedding a cavity; 7. a material returning device; 71. a mandril 72 and a mandril; 8. and (4) an inner hexagon bolt.

Detailed Description

The utility model is described in detail below with reference to the following figures and embodiments:

1-3, the large stainless steel flange forging die is provided with an upper backing plate 1 and a lower backing plate 2 which correspond to each other up and down, wherein an upper circular plate 4 is fixedly arranged at the center of the bottom of the upper backing plate 1, an upper punch 5 is fixedly arranged at the center of the bottom of the upper circular plate 4, the upper punch 5 protrudes downwards below the bottom of the upper circular plate 4, and a part of the upper punch 5 protruding below the bottom of the upper circular plate 4 forms an extrusion forming part for die forging of a flange center hole; an outer die ring 3 is fixedly arranged at the top center of the lower backing plate 2, a die cavity for forming a flange forging is arranged at the top center of the outer die ring 3, and the upper punch 5 corresponds to the die cavity up and down; the die cavity consists of an extension cavity 32 and a main die cavity 31 which are communicated with each other up and down, the diameter of the extension cavity 32 is consistent with that of the upper circular plate 4 and can be sleeved and matched with each other, the diameter of the extension cavity 32 is larger than that of the main die cavity 31, the diameter of the main die cavity 31 is larger than the maximum diameter of the upper punch 5, and the upper punch 5 can extend downwards into the main die cavity 31; the center of the bottom of the outer die ring 3 is provided with a lower circular plate joining part 34 which is communicated with the main die cavity 31 from top to bottom, a lower circular plate 6 which is identical with the lower circular plate joining part 4 in structure and identical in size is arranged in the lower circular plate joining part, a T-shaped embedded cavity 61 which is communicated from top to bottom is arranged at the center of the lower circular plate 6, a T-shaped material returning device 7 which is identical with the lower circular plate 61 in shape and identical in size is movably arranged in the embedded cavity 61, and a material returning joining hole 23 which is communicated from top to bottom and matched with the lower circular plate is arranged at the position, corresponding to the bottom of the material returning device 7, on the lower backing plate 2.

In order to prevent the upper punch 5 and the outer die ring 3 from radially deviating during processing and affecting the processing, the bottom of the upper circular plate 4 is provided with a limiting hole 41 which is in sleeve fit with the top of the upper punch 5; the bottom of the outer die ring 3 is provided with a downward limiting bulge 33, and the top of the lower backing plate 2 is provided with an outer die limiting cavity 22 which is matched with the limiting bulge 33 in a vertically sleeved mode.

In order to not influence the processing of the forged piece and facilitate the withdrawal of the forged piece from the die cavity, the material returning device 7 is composed of a top head 72 and a top rod 71 which are connected up and down, the top head 72 and the top rod 71 are connected together through threads, the top surface of the top head 72 of the material returning device 7 sleeved in the embedded cavity 61 is flush with the top surface of the lower circular plate 6, and the bottom of the top rod 71 downwards sequentially penetrates through the embedded cavity 61 and the material returning connection hole 23 and extends below the bottom surface of the lower base plate 2.

In order to facilitate the connection of the ejector rod 71 and the material returning machine and push the ejector rod to move up and down, the distance h between the bottom surface of the ejector rod 71 and the bottom surface of the lower backing plate 2 is 35 mm.

In order to facilitate the installation and the disassembly of the lower circular plate 6 in the die cavity, the forging is not easy to deform and clamp in the die cavity during the processing, the lower circular plate joining part 34 is funnel-shaped, the top aperture is larger than the bottom aperture, and the top aperture is the same as the aperture of the main die cavity 31.

In order to facilitate the forming of the central hole of the flange and simultaneously facilitate the extrusion and extension forming of the blank, the outer diameter of the extrusion forming part is gradually reduced from top to bottom, and the corner between the outer peripheral surface and the bottom surface of the extrusion forming part is a fillet.

In order to facilitate the extension of the billet during extrusion and ensure the continuity, the corner between the extension cavity 32 and the main mold cavity 31 is a round corner.

In order to facilitate the installation and the disassembly without interference, the upper punch 5 and the upper circular plate 4, the upper circular plate 4 and the upper backing plate 1, and the outer die ring 3 and the lower backing plate 2 are fixedly connected together through the hexagon socket head cap screw 8.

In order to facilitate the positioning and the fixed connection of the upper backing plate 1 and the lower backing plate 2 on the press, a plurality of upper positioning grooves 11 which have the same interval and are communicated up and down are symmetrically arranged on the left side and the right side of the upper backing plate 1, and a plurality of lower positioning grooves 21 which have the same interval and are communicated up and down are symmetrically arranged on the left side and the right side of the lower backing plate 2.

In order to ensure the processing precision, a zero position H is arranged between the bottom surface of the upper backing plate 1 and the top surface of the outer die ring 3, and the zero position H is 105 mm.

The specific working principle is as follows: installing a lower circular plate 6 in a lower circular plate joining part 34 of an outer die ring 3, sleeving a material returning device 7 in an embedded cavity 61 of the lower circular plate 6, sleeving a limiting bulge 33 at the bottom of the outer die ring 3 in an outer die limiting cavity 22 at the top of a lower backing plate 2, fixedly connecting the lower backing plate 2 and the outer die ring 3 together through an inner hexagon bolt 8, penetrating the tail end of a mandril 71 in the material returning device 7 into a material returning joining hole 23 to be conveniently connected with a material returning machine, hoisting the lower backing plate 2 connected with the outer die ring 3, placing the lower backing plate 2 on a press workbench, and fixedly connecting the lower backing plate 2 together through a positioning bolt on the press workbench penetrating through a corresponding lower positioning groove 21; fixedly connecting a metal thick plate with a horizontal bottom surface to a pressing plate of a pressing machine through bolts, enabling the metal thick plate to vertically correspond to an outer die ring 3, vertically placing a calcined stainless steel bar at the center of the top of a lower circular plate 6, limiting through a heading cake ring sleeve to center the stainless steel bar, starting the pressing machine, controlling the metal thick plate to downwards extrude the stainless steel bar, forging the stainless steel bar into a cake-shaped blank with the diameter consistent with that of a main die cavity 31, disassembling the metal thick plate and the heading cake ring sleeve on the pressing machine, replacing an upper backing plate 1 connected with an upper punch 5 and an upper circular plate 4 on the pressing plate of the pressing machine, fixedly connecting the upper backing plate 1 to the pressing plate through an upper positioning groove 11 through bolts, adjusting the position of the upper punch 5, and ensuring that the upper punch 5 is vertically aligned with the die cavity; the cake-shaped blank is ejected by the material returning device 7 and then calcined again, and is placed in the main die cavity 31 again, then the pressing plate of the pressing machine is controlled to move downwards, the upper backing plate 1, the upper circular plate 4 and the upper punch 5 are driven to move downwards synchronously, the cake-shaped blank in the main die cavity 31 is forged and pressed until the zero point position is reached between the bottom surface of the upper backing plate 1 and the top surface of the outer die ring 3, the cake-shaped blank in the main die cavity 31 is subjected to the forging and pressing of the upper punch 5, the periphery of the cake-shaped blank extends upwards along the main die cavity 31 and the extension cavity 32, the balance of the peripheral height positions is ensured, no height difference exists, meanwhile, a central hole of a flange is formed in the middle, the blank in the shape of the flange is manufactured, the material is ejected upwards by the material returning device 7 after the flange blank is forged and formed, and then the flange blank is simply roughly processed and finely processed.

The large stainless steel flange forging die can forge and press a stainless steel bar into a forging blank with a structural shape close to the shape of the flange, the machining allowance is small during later rough machining and finish machining, the cost is saved, the machining efficiency is improved, centering is easy to occur during forging, the problem of eccentric forging is not easy to cause, and the machining quality of the flange forging is ensured.

It is to be emphasized that: the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a large-scale stainless steel flange forges mould, has upper padding plate (1) and lower bolster (2) that correspond from top to bottom, its characterized in that: an upper circular plate (4) is fixedly arranged at the center of the bottom of the upper padding plate (1), an upper punch (5) is fixedly arranged at the center of the bottom of the upper circular plate (4), the upper punch (5) protrudes downwards below the bottom of the upper circular plate (4), and a part, protruding downwards below the bottom of the upper circular plate (4), of the upper punch (5) forms an extrusion molding part for die forging of a central hole of a flange; an outer die ring (3) is fixedly arranged at the center of the top of the lower backing plate (2), a die cavity for forming a flange forging is arranged at the center of the top of the outer die ring (3), and the upper punch (5) corresponds to the die cavity up and down; the die cavity consists of an extension cavity (32) and a main die cavity (31) which are communicated with each other from top to bottom, the diameter of the extension cavity (32) is larger than that of the main die cavity (31), the diameter of the main die cavity (31) is larger than the maximum diameter of the upper punch (5), and the upper punch (5) can extend downwards into the main die cavity (31); outer mould circle (3) bottom center be provided with lower plectane linking portion (34) of intercommunication about main die cavity (31), be provided with down plectane (6) rather than the identical and identical lower plectane of size of structure in plectane linking portion (34) down, the center of plectane (6) is provided with the pre-buried chamber of "T" type (61) of intercommunication from top to bottom down, and this pre-buried chamber of (61) internalization is provided with rather than the identical and identical anastomotic "T" type material returned device of size of shape (7), correspond on lower bolster (2) material returned device (7) bottom the position be provided with about the intercommunication and rather than cup joint complex material returned linking hole (23).

2. The large stainless steel flange forging die of claim 1, wherein: the bottom of the upper circular plate (4) is provided with a limit hole (41) which is in sleeve fit with the top of the upper punch (5); the bottom of the outer mold ring (3) is provided with a downward limiting bulge (33), and the top of the lower backing plate (2) is provided with an outer mold limiting cavity (22) which is matched with the limiting bulge (33) in a sleeved mode from top to bottom.

3. The large stainless steel flange forging die of claim 1, wherein: the material returning device (7) is composed of an upper top (72) and a lower top (71) which are connected with each other, the upper top (72) and the lower top (71) are connected with each other through threads, the top surface of the material returning device (7) sleeved in the embedded cavity (61) is flush with the top surface of the lower circular plate (6), and the bottom of the upper top (71) downwards penetrates through the embedded cavity (61) and the material returning connection hole (23) in sequence and extends below the bottom surface of the lower base plate (2).

4. A large-scale stainless steel flange forging die according to claim 3, wherein: the distance h between the bottom surface of the mandril (71) and the bottom surface of the lower backing plate (2) is 35 mm.

5. The large stainless steel flange forging die of claim 1, wherein: the lower circular plate joining part (34) is funnel-shaped, the aperture of the top of the lower circular plate joining part is larger than that of the bottom of the lower circular plate joining part, and the aperture of the top of the lower circular plate joining part is the same as that of the main die cavity (31).

6. The large stainless steel flange forging die of claim 1, wherein: the external diameter of the extrusion forming part is gradually reduced from top to bottom, and the corner between the peripheral surface and the bottom surface of the extrusion forming part is a fillet.

7. The large stainless steel flange forging die of claim 1, wherein: the corner between the extension cavity (32) and the main mold cavity (31) is a round corner.

8. The large stainless steel flange forging die of claim 1, wherein: the upper punch head (5) and the upper circular plate (4), the upper circular plate (4) and the upper backing plate (1) and the outer die ring (3) and the lower backing plate (2) are fixedly connected together through the inner hexagon bolts (8).

9. The large stainless steel flange forging die of claim 1, wherein: the left side and the right side of the upper backing plate (1) are symmetrically provided with a plurality of upper positioning grooves (11) which have the same interval and are communicated from top to bottom, and the left side and the right side of the lower backing plate (2) are symmetrically provided with a plurality of lower positioning grooves (21) which have the same interval and are communicated from top to bottom.

10. The large stainless steel flange forging die of claim 1, wherein: zero point position H is arranged between the bottom surface of the upper backing plate (1) and the top surface of the outer die ring (3), and the zero point position H is 105 mm.