Insulating die plate, forging press and ceramic insulating body

Patent metadata

Field	Value
Publication number	US-2023398595-A1
Application number	US-202318205635-A
Country	US
Kind code	A1
Filing date	Jun 5, 2023
Priority date	Jun 14, 2022
Publication date	Dec 14, 2023
Grant date	—

Abstract

An insulating die plate includes two parallel end plates and an insulating layer arranged therebetween which includes ceramic insulating bodies. An insulating body plane parallel to the end plates is defined for the insulating layer. Intermediate spaces are arranged on the insulating body plane between the insulating bodies. A total insulating layer area includes at least surface insulating body portions and surface intermediate space portions. In each section through the insulating bodies parallel to the insulating body plane, an insulating body surface portion in the total insulating layer area is at least 50%, the insulating bodies are symmetrically formed, with the top side equal to the bottom side of the insulating body and each insulating body designed as a plate having a height and a maximum width at least 2.5 times wider than the height of the insulating body; and/or the insulating bodies are anisotropically shaped.

First claim

What is claimed is:

1 . An insulating die plate ( 1 ) comprising two end plates ( 27 , 28 , 37 , 38 ) arranged in parallel with one another and comprising an insulating layer ( 21 , 31 ) arranged between the two end plates ( 27 , 28 , 37 , 38 ), which comprises ceramic insulating bodies ( 40 ), wherein an insulating body plane ( 22 , 32 ) arranged at least parallel to the end plates ( 27 , 28 , 37 , 38 ) is defined for the insulating layer ( 21 , 31 ), wherein the insulating bodies ( 40 ) are arranged spaced apart next to one another on the insulating body plane ( 22 , 32 ), whereby intermediate spaces ( 41 ) are arranged on the insulating body plane ( 22 , 32 ) between the insulating bodies ( 40 ), wherein a total area of the insulating layer ( 21 , 31 ) comprises at least surface portions of the insulating bodies ( 40 ) and surface portions of the intermediate spaces ( 41 ), wherein
(i) in each section through the insulating bodies ( 40 ) parallel to the insulating body plane ( 22 , 32 ), a surface portion of the insulating bodies ( 40 ) in the total area of the insulating layer ( 21 , 31 ) is at least 50%, the insulating bodies ( 40 ) are symmetrically formed, wherein the top side of the insulating body ( 40 ) is equal to the bottom side of the insulating body ( 40 ) and all insulating bodies ( 40 ) are designed as a plate, wherein the plates have a height ( 42 ) and a maximum width ( 43 ) and are designed to be wider than their height, wherein the maximum width of the insulating body ( 40 ) is at least 2.5 times the height of the insulating body ( 40 ); and/or (ii) the insulating bodies ( 40 ) are anisotropically shaped.

2 . The die plate ( 1 ) according to claim 1 , wherein the end plates ( 27 , 28 , 37 , 38 ) are subjected to preliminary stress.

3 . The die plate ( 1 ) according to claim 1 , wherein a plurality of insulating bodies ( 40 ) are arranged on each insulating body plane ( 22 , 32 ).

4 . The die plate ( 1 ) according to any one of claim 1 , wherein, within the insulating layer ( 21 , 31 ) ceramic insulating bodies ( 40 ) are arranged on at least two, in particular, on at least three insulating body planes ( 22 , 33 ).

5 . The die plate ( 1 ) according to claim 4 , wherein the insulating bodies ( 40 ) of the individual planes are arranged coaxially to each other and/or that the insulating bodies ( 40 ) are aligned equally.

6 . The die plate ( 1 ) according to claim 4 , wherein an intermediate layer ( 46 ) is arranged between the insulating bodies arranged on top of each other ( 40 ).

7 . A forging press ( 10 ) for pressing a semi-finished product ( 15 ) in one pressing direction ( 17 ) with a press tappet ( 12 ) and with at least one drawbar ( 14 ) and with at least one upper die ( 20 ) and one lower die ( 30 ), wherein each of the dies ( 20 , 30 ) comprises a cold die part ( 25 , 35 ) and a hot die part ( 26 , 36 ), wherein each of the dies ( 20 , 30 ) comprises an insulating die plate ( 1 ) arranged perpendicular to the pressing direction ( 17 ) according to claim 1 , wherein the die plate ( 1 ) is respectively arranged between the cold die part ( 25 , 35 ) and the hot die part ( 26 , 36 ), wherein each of the die plates ( 1 ) is arranged between a cold cover side ( 23 , 33 ) arranged on the side of the cold die part ( 25 , 35 ) and a hot cover side ( 24 , 34 ) arranged on the side of the hot die part ( 26 , 36 ).

8 . A forging press ( 10 ) for pressing a semi-finished product ( 15 ) in one pressing direction ( 17 ) with a press tappet ( 12 ) and with at least one drawbar ( 14 ) and with at least one upper die ( 20 ) and one lower die ( 30 ), wherein each of the punches ( 20 , 30 ) comprises a cold die part ( 25 , 35 ) and a hot die part ( 26 , 36 ), wherein each of the punches ( 20 , 30 ) comprise an insulating layer ( 21 , 31 ) arranged perpendicular to the pressing direction ( 17 ), wherein the insulating layer ( 21 , 31 ) is respectively arranged between the cold die part ( 25 , 35 ) and the hot die part ( 26 , 36 ), wherein each of the insulating layers ( 21 , 31 ) is arranged between a cold cover side ( 23 , 33 ) situated on the side of the cold die part ( 25 , 35 ) and a hot cover side ( 24 , 34 ) situated on the side of the hot die part ( 26 , 36 ), wherein the insulating layer ( 21 , 31 ) comprises ceramic insulating bodies ( 40 ), wherein an insulating body plane ( 22 , 32 ) arranged at least parallel to the end plates ( 27 , 28 , 37 , 38 ) is defined for the insulating layer ( 21 , 31 ), wherein the insulating bodies ( 40 ) are arranged spaced apart next to one another on the insulating body plane ( 22 , 32 ), whereby, on the insulating body plane ( 22 , 32 ) between insulating bodies ( 40 ), intermediate spaces ( 41 ) are formed, wherein a total area of the insulating layer ( 21 , 31 ) comprises at least surface portions of the insulating bodies ( 40 ) and surface portions of the intermediate spaces ( 41 ), wherein
(i) a plurality of insulating bodies ( 40 ) are arranged in each insulating body plane ( 22 , 32 ), wherein, in each section through the insulating bodies ( 40 ) parallel to the insulating body plane ( 22 , 32 ), a surface portion of the insulating body ( 40 ) in the total area of the insulating layer ( 21 , 31 ) is at least 50%, the insulating bodies are symmetrically formed, wherein the top side of the insulating body is equal to the bottom side of the insulating body and all insulating bodies are designed as plates, wherein the plates ( 42 ) have a height and a maximum width ( 43 ) and are wider than their height, wherein the maximum width of the insulating body ( 40 ) is at least 2.5 times the height of the insulating body ( 40 ); and/or (ii) the insulating bodies ( 40 ) are anisotropically shaped.

9 . The forging press ( 10 ) according to claim 8 , wherein, within the insulating layer ( 21 , 31 ), ceramic insulating bodies ( 40 ) are arranged on at least two, in particular, on at least three insulating body planes ( 22 , 33 ).

10 . The forging press ( 10 ) according to claim 9 , wherein the insulating bodies ( 40 ) of the individual planes are arranged coaxially to each other and/or that the insulating bodies ( 40 ) are aligned equally.

11 . The forging press ( 10 ) according to claim 9 , wherein an intermediate layer ( 46 ) is arranged between the insulating bodies arranged on top of each other ( 40 ).

12 . A ceramic insulating body ( 40 ) for insulating within a die ( 20 , 30 ) of a forging press ( 10 ), wherein
(i) the insulating body is plate-shaped, wherein the plate has a height and a maximum width and is wider than its height, wherein the maximum width of the insulating body ( 40 ) is at least 2.5 times the height of the insulating body ( 40 ); and/or (ii) the insulating body ( 40 ) has an open porosity of zero vol % and/or has a density between 2.2 and 5.0 g/cm 3 and/or has a flexural strength in the unglazed state between 100 and 450 MPa and/or has a modulus of elasticity between 70 and 200 GPa; and/or (iii) the insulating body ( 40 ) has an average coefficient of linear expansion at 30 to 600° C. between 5 and 10 10 −6 K −1 and/or a specific heat capacity at 30 to 600° C. between 700 and 1000 Jkg −1 K −1 and/or a thermal conductivity between 1.5 and 5 Wm −1 K −1 ; and/or (iv) the insulating body ( 40 ) at 20° C. has a specific electrical resistance between 5·10 10 and 10 12 Ohm·cm and/or at 600° C., a specific electrical resistance between 5·10 2 and 10 6 Ohm·cm; and/or (v) the insulating body ( 40 ) has a proportion of soapstone between 50 and 95% and/or a proportion of 50 to 85% SiO 2 and/or a proportion of 20 to 40% MgO; and/or (vi) the ins

Assignees

• Sms Group Gmbh

Inventors

• Zafari Ali
• Brenner Andreas
• Ackermann Stephan
• Rossbach Axel
• Karakas Erdem

Classifications

• B21D37/16 Primary

  Heating or cooling · CPC title

• B21D37/10

  Die sets; Pillar guides · CPC title

• B21J13/03 Primary

  Die mountings · CPC title

• B21J13/02

  Dies or mountings therefor · CPC title

• B21J9/02

  Special design or construction · CPC title