CN113617999B - In-vitro forging method of cake forging - Google Patents
In-vitro forging method of cake forging Download PDFInfo
- Publication number
- CN113617999B CN113617999B CN202110230023.1A CN202110230023A CN113617999B CN 113617999 B CN113617999 B CN 113617999B CN 202110230023 A CN202110230023 A CN 202110230023A CN 113617999 B CN113617999 B CN 113617999B
- Authority
- CN
- China
- Prior art keywords
- forging
- blank
- beam body
- cake
- connecting plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
- B21J7/02—Special design or construction
- B21J7/04—Power hammers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/06—Hammers tups; Anvils; Anvil blocks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses an in-vitro forging method of cake forgings, belongs to the technical field of forging of forgings, and solves the problem that the structure and the size of forging equipment are limited, so that ultra-large forgings cannot be subjected to integral forging. The in-vitro forging method of the invention is to smelt raw materials; cogging the steel ingot; the upper end face of a beam body of forging equipment is connected with a movable cross beam of the forging equipment, one end of the beam body is a forging side, a hammer head is arranged on the forging side of the beam body, the other end of the beam body is a non-forging side, the non-forging side of the beam body is connected with a mounting face of the forging equipment, a forging platform of the forging equipment is arranged under the hammer head, a blank is arranged on the forging platform, and the forging side of the beam body is positioned outside an area surrounded by a stand column of the forging equipment; starting forging equipment, rotating the forging side around the non-forging side in the moving process of the movable cross beam, and forging the blank by the hammer head to obtain the cake forging. The in-vitro forging method can be used for forging cake forgings.
Description
Technical Field
The invention belongs to the technical field of forging of forgings, and particularly relates to an in-vitro forging method of cake forgings.
Background
The free forging manufacturing process of the traditional cake forgings is to place blanks in forging equipment for rotary forging forming, and for ultra-large cake forgings with the size exceeding the structural space of the forging equipment body, only a plurality of tailor-welded structures can be adopted, see fig. 1 to 2, and the tailor-welded structures are adopted, so that the manufacturing process is complex, the final material yield is low, the manufacturing period is long, and most importantly, the service stability of the cake forgings caused by welding seams is poor, so that the service life of main equipment is reduced. Meanwhile, aiming at special equipment, in-service inspection of welding seams is required to be carried out regularly, and the running cost of main equipment is also increased.
At present, a reactor cake forging with a maximum size of 7600mm diameter is known, but for ultra-large cake forgings (with a diameter exceeding 8000 mm), a forging plate welding mode is still needed to manufacture.
Therefore, there is a need to solve the problem that the ultra-large forging cannot be finish forged due to the structure and size limitation of the existing forging apparatus.
Disclosure of Invention
In view of the above analysis, the present invention aims to provide an in vitro forging method for cake forgings, which solves the problem that the forging equipment cannot perform integral forging on oversized forgings due to the structure and size limitation.
The aim of the invention is mainly realized by the following technical scheme:
the invention provides an in-vitro forging method of cake forgings, which comprises the following steps:
smelting raw materials to obtain a steel ingot;
cogging the steel ingot to obtain a blank;
connecting the upper end face of a beam body of forging equipment with a movable cross beam of the forging equipment, wherein one end of the beam body is a forging side, a hammer head is arranged on the forging side of the beam body, the other end of the beam body is a non-forging side, the non-forging side of the beam body is connected with a mounting face (for example, the ground) of the forging equipment, a forging platform is arranged right below the hammer head, a blank is arranged on the forging platform, and the forging side of the beam body is positioned outside an area surrounded by a stand column of the forging equipment;
starting forging equipment, rotating the forging side around the non-forging side in the moving process of the movable cross beam, and forging the blank by the hammer head to obtain the cake forging.
Further, in the moving process of the movable cross beam, the forging side rotates around the non-forging side, the beam body and the movable cross beam form a shoulder pole beam, the load applied to the beam body by the movable cross beam is transferred to the hammer head located on the forging side of the beam body, and the hammer head forges the blank.
Further, the fixture auxiliary tool comprises a beam body, a hammer head and a forging platform, wherein one side, connected with the hammer head, of the beam body is defined as a forging side, the other side of the beam body is a non-forging side, that is, the hammer head is arranged on the forging side of the beam body, the non-forging side is connected with a mounting surface of forging equipment, the forging platform is arranged under the hammer head, and the beam body and the movable cross beam form a shoulder pole beam.
Further, the weight ratio of the steel ingot to the cake forging is 1.2-1.8 (e.g., 1.5).
Further, the cogging comprises the following steps:
the steel ingot is sequentially subjected to jaw pressing, upsetting, drawing (for example, KD drawing) and cutting pliers opening blanking.
Further, in the cogging process, the upsetting ratio and the drawing ratio are controlled to be 2.2-2.5.
Further, the blank comprises an internal forging zone and an external forging zone positioned at the edge of the internal forging zone, the thickness of the internal forging zone is smaller than that of the external forging zone, the thickness h of the internal forging zone is the final size of forming the cake-like forge piece, the cross section of the blank along the axial direction is I-shaped, namely, the shape of the blank is the shape with thin middle and thick periphery.
Further, the outer diameter D of the in-vitro forging zone of the billet (i.e., the diameter of the billet as a whole) is less than the column spacing of the forging apparatus.
Further, the difference between the column spacing and the outer diameter D of the in-vitro forging area of the blank is 100-150 mm.
Further, the in vivo forged region diameter d is calculated using the following formula:
wherein D is 2 Is the column spacing, m, L of forging equipment 2 For extending the upright post into forging equipmentThe transverse distance of the core, m and L1 are the transverse distance between the hammer head of the tool auxiliary tool for external forging and the center of forging equipment, and m and D are the final diameter of the blank, and m.
Further, the thickness H of the in vitro forging zone was calculated using the following formula:
wherein V is the final volume formed by cake forgings, m 3 D is the final diameter of the blank, m, H is the thickness of the in-vivo forging zone, m, H is the thickness of the in-vitro forging zone, and m.
Further, forging the blank by the hammer head comprises the following steps: the blank is forged by rings from the edge of an external forging area of the blank, and the pressing amount of each ring is 85 mm-110 mm.
Further, in two adjacent circles, the overlap joint amount of the hammer heads is 1/3-1/2 of the width of the hammer heads.
Further, in two adjacent circles, the ratio of the movement amount of the forging platform to the width of the hammer head is 1/2-3/4.
Further, the manufacturing method of the blank comprises the following steps:
step 1: upsetting the original blank in forging equipment, and then stretching (e.g. spinning stretching) by adopting a flat hammer to obtain a blank to be processed;
step 2: forging the central area of the blank to be processed to form an internal forging area, wherein the non-notched and finishing part is an external forging area, so that the blank is prepared.
Further, in the step 1, the stretching includes the following steps:
step 11: preliminary stretching is carried out on the original blank after upsetting to obtain a preliminary stretched blank, and a boss (for example, a cylindrical boss) is reserved in the center of the preliminary stretched blank;
step 12: and flattening the bulges by adopting a flat cover plate.
Further, diameter D of the protrusion t And initially widening the diameter D of the blank c The ratio is 1:2 to 5 (e.g.,1: 3) Thickness H of the protrusion t And initially stretching the thickness H of the blank c The ratio (thickness excluding the protrusions) is 1:2 to 5 (e.g., 1:3).
Further, the step 2 includes the following steps:
step 21: a strip-shaped hammer (namely a double-sector hammer) is adopted to open a recess on one surface of a blank to be processed, so that the diameter of the blank is rapidly increased, and then a round hammer is adopted to finish the blank to obtain a blank with a recess on one surface;
step 22: turning the single-sided concave-opened blank by 180 degrees, and padding a bottom pad on the single-sided concave-opened blank, wherein the other side of the blank to be processed adopts a round hammer head to shift, so as to form an internal forging area, and the non-concave-opened and finishing part is an external forging area, thereby preparing the blank, and the diameter of the blank to be processed after shifting is unchanged.
Further, in the concave opening process, the rotation angle of each pass of the strip-shaped hammer head is 0 degree, 90 degrees, 45 degrees, 90 degrees, 22.5 degrees, 90 degrees, 45 degrees, 90 degrees, 11.25 degrees, 90 degrees, 45 degrees and 90 degrees in sequence, wherein each pass is a step hammer period, a step hammer period adopts symmetrical pressing hammers, and the pressing amount of each pass is 80-100 mm.
Further, the tool auxiliary tool further comprises a beam body connecting piece, the movable cross beam is connected with the beam body through the beam body connecting piece, and particularly, the beam body connecting piece comprises an upper beam body connecting plate and a lower beam body connecting plate hung below the upper beam body connecting plate, cylindrical surface contact is formed between the upper beam body connecting plate and the lower beam body connecting plate, the upper beam body connecting plate is fixedly connected with the movable cross beam, and the lower beam body connecting plate is fixedly connected with the beam body.
Further, the convex radius of the upper beam connecting plate is smaller than the concave radius of the lower beam connecting plate.
Further, the ratio of the convex radius of the upper beam body connecting plate to the concave radius of the lower beam body connecting plate is 0.9-0.98: 1.
further, the convex radius of the upper beam body connecting plate is calculated by adopting the following formula:
δ＝R×sinα
delta is the maximum unbalanced load center distance of forging equipment, R is the convex radius of the upper beam body connecting plate 5, and alpha is the maximum inclination angle of the bearing plate.
Further, the tool auxiliary tool further comprises a hammer connecting piece, the hammer is connected with the forging side of the beam body through the hammer connecting piece, specifically, the hammer connecting piece comprises an upper hammer connecting plate and a lower hammer connecting plate hung below the upper hammer connecting plate, spherical contact is formed between the upper hammer connecting plate and the lower hammer connecting plate, the upper hammer connecting plate is fixedly connected with the forging side of the beam body, and the lower hammer connecting plate is fixedly connected with the hammer.
Further, the convex radius of the upper hammer head connecting plate is smaller than the concave spherical radius of the lower hammer head connecting plate.
Further, the ratio of the convex radius of the upper hammer head connecting plate to the concave spherical radius of the lower hammer head connecting plate is 0.9-0.98: 1.
further, the tool auxiliary tool further comprises an elastic box, and the non-forging side of the beam body is supported on the mounting surface of the forging equipment through the elastic box.
Further, the elastic box comprises a box body, a box cover, a spring (for example, a disc spring) and a guide pillar, one end of the guide pillar is supported at the bottom of the box body through the spring, the box cover is arranged at the other end of the guide pillar, a gap is reserved between the box body and the box cover, the box body is arranged on a mounting surface of forging equipment, and a non-forging side of the beam body is supported on the box cover.
Further, the spring includes a plurality of disc springs arranged along an axial direction of the spring, the plurality of disc springs constituting a set of springs.
Further, the elastic box further comprises a spring guide cylinder arranged in the box body and a guide post guide cylinder arranged in the box cover, wherein the spring part is arranged in the spring guide cylinder, and the other end of the guide post is inserted into the guide post guide cylinder.
Further, both the spring guide and the guide post guide may be cylindrical in shape.
Further, the tool auxiliary tool further comprises a box connecting piece, the non-forging side of the beam body is connected with the elastic box through the box connecting piece, and particularly, the box connecting piece comprises an upper box connecting plate and a lower box connecting plate hung below the upper box connecting plate, cylindrical surface contact is formed between the upper box connecting plate and the lower box connecting plate, the upper box connecting plate is fixedly connected with the non-forging side of the beam body, and the lower box connecting plate is fixedly connected with the elastic box.
Further, the convex radius of the upper box connecting plate is smaller than the concave radius of the lower box connecting plate.
Further, the ratio of the convex radius of the upper box body connecting plate to the concave radius of the lower box body connecting plate is 0.9-0.98: 1.
further, the tool auxiliary tool further comprises a rotating platform for driving the blank to rotate, wherein the rotating platform is arranged below the hammer head obliquely, and one side of the forging platform is provided with the rotating platform.
Further, the rotary platform rotates in a transmission mode driven by air force, hydraulic force or external force.
Further, the side of the forging stage facing the rotating stage is conformal with the rotating stage.
Further, the rotary platform is circular in shape, the diameter of the rotary platform is smaller than that of the blank, one side of the forging platform, facing the rotary platform, is arc-shaped, and the whole shape of the forging platform is crescent.
Compared with the prior art, the invention has at least one of the following beneficial effects:
a) According to the in-vitro forging method of the cake forgings, the upper end face of the beam body is connected with the movable cross beam of the forging equipment through the arrangement of the beam body, the forging side rotates around the non-forging side in the moving process of the movable cross beam to form the shoulder pole beam, compared with the movable cross beam, the movable distance of the forging side is larger than that of the movable cross beam, and the forging forming process is moved outside the forging equipment, so that the cake forgings exceeding the span (the diameter is over 8000 mm) can be integrally formed in a free forging mode without being limited by the structural size (such as the span and the stand column spacing) of the forging equipment.
b) In the in-vitro forging method of the cake forgings, the blank is divided into the in-vivo forging area finished in the forging equipment and the in-vitro forging area finished outside the forging equipment, namely, the forging of the cake forgings is divided into two procedures of in-vivo forging and in-vitro forging, so that in the forming process of the cake forgings, only the in-vitro forging area of the blank is required to be forged, and the problems that the length of a beam body is too short, a hammer cannot extend far, the action range of the hammer cannot fully cover the blank, and only the edge of the blank can be acted are solved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for the purpose of illustrating the invention and are not to be construed as limiting the invention, like reference numerals referring to like parts throughout the several views.
FIG. 1 is a schematic diagram of a prior art cake forging employing a tailor welded construction;
FIG. 2 is a schematic illustration of another prior art cake forging employing a tailor welded construction;
FIG. 3 is a schematic structural view of a blank to be processed in an in vitro forging method of a cake forging according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a blank in an in vitro forging method of a cake forging according to an embodiment of the present invention;
FIG. 5 is a schematic diagram showing the positional relationship between a blank and an upright post of forging equipment and an auxiliary tool in an in-vitro forging method of a cake forging according to the first embodiment of the present invention;
FIG. 6 is a flow chart of a method for manufacturing a blank in an in vitro forging method of a cake forging according to an embodiment of the present invention;
FIG. 7 is a front view of an accessory tool used in the in-vitro forging method of cake forgings according to the first embodiment of the present invention;
fig. 8 is a front view of an elastic box of a tool auxiliary tool used in the in-vitro forging method of cake forgings according to the first embodiment of the invention.
Reference numerals:
1-a beam body; 2-hammer head; 3-forging a platform; 4-a movable cross beam; 5-an upper beam body connecting plate; 6-a lower beam body connecting plate; 7-blank; 71-in-vivo forging zone; 72-an in vitro forging zone; 8-an elastic box; 81-a box body; 82-case cover; 83-springs; 84-guide posts; 85-spring guide; 86-a guide post guide cylinder; 87-upper box connecting plates; 88-connecting the lower box body; 9-an upper hammer connecting plate; 10-connecting a lower hammer head; 11-a rotating platform; 12-upright posts.
Detailed Description
The following detailed description of the preferred invention is provided in connection with the accompanying drawings, which form a part hereof, and together with the description serve to explain the principles of the invention.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the term "coupled" should be interpreted broadly, for example, as being fixedly coupled, as being detachably coupled, as being integrally coupled, as being mechanically coupled, as being electrically coupled, as being directly coupled, as being indirectly coupled via an intermediate medium.
The terms "top," "bottom," "above … …," "below," and "on … …" are used throughout the description to refer to the relative positions of components of the device, such as the relative positions of the top and bottom substrates inside the device. It will be appreciated that the devices are versatile, irrespective of their orientation in space.
The working surface of the invention can be a plane or a curved surface, and can be inclined or horizontal. For convenience of explanation, the embodiments of the present invention are placed on a horizontal plane and used on the horizontal plane, and thus "up and down" and "up and down" are defined.
Example 1
The embodiment provides an in-vitro forging method of cake forgings, referring to fig. 3 to 8, comprising the following steps:
smelting raw materials to obtain a steel ingot;
cogging the steel ingot to obtain a blank 7;
the upper end face of a beam body 1 of the tool auxiliary tool is connected with a movable cross beam 4 of forging equipment, one end of the beam body 1 is a forging side, a hammer head 2 is arranged on the forging side of the beam body 1, the other end of the beam body 1 is a non-forging side, the non-forging side of the beam body 1 is connected with a mounting face of the forging equipment, a forging platform 3 is arranged right below the hammer head 2, a blank 7 is arranged on the forging platform 3, and the forging side of the beam body 1 is positioned outside the forging equipment;
starting forging equipment, and rotating the forging side around the non-forging side in the moving process of the movable cross beam 4, wherein the hammer head 2 forges the blank 7 to obtain a cake forging.
Specifically, the tool auxiliary tool comprises a beam body 1, a hammer head 2 and a forging platform 3, wherein one side, connected with the hammer head 2, of the beam body 1 is defined as a forging side, the other side of the beam body 1 is a non-forging side, namely, the hammer head 2 is arranged on the forging side of the beam body 1, the non-forging side is connected with a mounting surface of forging equipment, the forging platform 3 is arranged right below the hammer head 2, and the beam body 1 and a movable cross beam 4 form a shoulder pole beam; in the moving process of the movable cross beam 4, the forging side rotates around the non-forging side, and the load applied to the beam body 1 by the movable cross beam 4 of the forging equipment can be transmitted from the inside of the forging equipment to the forging side at the outer side of the forging equipment, the hammer head 2 forges the blank 7 positioned on the forging platform 3, and the hammer head 2 and the forging platform 3 jointly act to deform the blank 7, so that the in-vitro forging of the cake forging is realized.
Compared with the prior art, the in-vitro forging method for cake forgings, provided by the embodiment, has the advantages that through the arrangement of the beam body 1, the upper end face of the beam body 1 is connected with the movable cross beam 4 of forging equipment, the forging side rotates around the non-forging side in the moving process of the movable cross beam 4 to form the shoulder pole beam, compared with the movable cross beam 4, the moving distance of the forging side is larger than that of the movable cross beam 4, and the forging forming process is moved outside the forging equipment, so that the limitation of the structural size (such as the span and the spacing between the upright posts 12) of the forging equipment is avoided, and the ultra-large cake forgings exceeding the span are integrally formed in a free forging mode.
Considering that the steel ingot has loss in the process of treatment, a certain loss amount needs to be reserved, and the weight ratio of the steel ingot to the cake forging is 1.2-1.8 (for example, 1.5) by way of example, by reserving the certain loss amount, the cutting amount of the water riser and the fire consumption of each fire in the processes of upsetting and blanking and cogging of the steel ingot can be effectively compensated.
It should be noted that, the purpose of cogging is to make the structure of the steel ingot uniform, and make the cast structure produced in the solidification process of the steel ingot change into equiaxial structure, weld the hole in the steel ingot, thus improve the compactness of the cake forging made, cogging includes the following steps:
the steel ingot is sequentially subjected to pressing jaw, upsetting, drawing (such as KD drawing) and cutting jaw blanking, wherein the upsetting (upsetting and drawing) can ensure the core flaw detection quality of the manufactured cake forging because the cake forging is a solid forging.
Illustratively, during the above-described cogging, the general upsetting ratio and the drawing ratio are controlled to be 2.2 to 2.5.
It is worth noting that the existing cake forging is formed between the columns 12 of the forging and pressing equipment, the size of the finally formed blank is smaller than the distance between the columns 12, and in the forming process, the blank can be pulled back and forth along with a platform to adjust the relative position between the blank and a hammer head, so that the forming process does not need to consider the forming process of each position, the steel ingot is cut off, the feeder head is blanked, the cover plate is firstly used for upsetting, then the flat hammer head is used for rotary forging, and the middle of the rotary forging is turned for 180 degrees, so that deformation dead areas on two sides of the blank are deformed to a certain extent, and the final forming of the blank is completed. For the cake forging with the diameter of the finally formed blank being larger than the distance between the upright posts 12 of the forging equipment, on the basis of the existing forging equipment conditions, in order to realize the integral forming of the cake forging, an external forging technology is required, namely, an external forging tool is adopted to assist in transferring the load of the forging equipment to the outside of the forging equipment, so that the cake forging realizes the forming process of the last fire outside the body. Based on the manufacturability of external forging and the characteristics of the auxiliary tool, the manufacturing of cake forgings is different from the traditional manufacturing process, and because the diameter of the blank is larger than the distance between the upright posts 12, the last fire which is formed is limited by space, the length of the main bearing beam cannot be too long, so that the hammer cannot extend out a long distance, the action range of the hammer cannot fully cover the blank, and the hammer can only act on the edge of the blank. In view of the above, the blank 7 size required for the forming fire needs to be reasonably designed to meet the final forming needs. Therefore, the structure of the blank 7 specifically includes an internal forging zone 71 and an external forging zone 72 located at the edge of the internal forging zone 71, wherein the thickness of the internal forging zone 71 is smaller than that of the external forging zone 72, the thickness h of the internal forging zone 71 is the final dimension of forming the cake-like forging, and the cross-sectional shape of the blank 7 along the axial direction is i-shaped, namely, the shape of the blank 7 is a shape with thin middle and thick periphery. In practice, the in-body forging zone 71 of the blank 7 is completed in forging equipment (e.g., free forging press, crank press, screw press, friction press or forging hammer), the in-body forging zone 72 of the blank 7 is completed outside the forging equipment, and during in-body forging of the blank 7, since the in-body forging zone 71 is completed in the forging equipment, the in-body forging zone 72 of the blank 7 is simply forged by the hammer head 2 to reduce the thickness to the final size for forming the cake-like forging. In this way, the blank 7 is divided into an internal forging area 71 finished in the forging equipment and an external forging area 72 finished outside the forging equipment, that is, the forging of the cake forging is divided into two procedures of internal forging and external forging, so that in the forming process of the cake forging, only the external forging area 72 of the blank 7 is required to be forged, and the problems that the length of the beam body 1 is too short, the hammer head 2 cannot extend a long distance, the action range of the hammer head 2 cannot fully cover the blank 7, and only the edge of the blank 7 can be acted on can be solved.
To further facilitate forging of the blank 7 described above, the outer diameter D of the in-vitro forging zone of the blank 7 (i.e., the diameter of the entire blank 7) is smaller than the pitch of the pillars 12 of the forging apparatus, and the difference between the pitch of the pillars 12 and the outer diameter D of the in-vitro forging zone of the blank 7 is, for example, 100 to 150mm. The outer diameter D of the external forging area of the blank 7 is limited in the range, so that the overall diameter of the blank 7 can be increased as much as possible, the requirement of external forging of ultra-large cake forgings can be met, the blank 7 can be conveniently taken and placed from forging equipment, and collision with the upright post 12 of the forging equipment when the blank 7 is moved out of the forging equipment can be avoided.
For the in vivo forged region diameter d, specifically, it is calculated using the following formula:
wherein D is 2 Is the column spacing, m, L of forging equipment 2 The transverse distance from the extension of the upright post to the center of the forging equipment is m, L1 is the transverse distance between the hammer head of the tool auxiliary tool for external forging and the center of the forging equipment, m, D is the final diameter of the blank, and m.
For the thickness H of the in-vitro forging zone, according to the in-vivo forging zone diameter d and the volume invariance principle obtained by the calculation, the thickness H is calculated by adopting the following formula:
wherein V is the final volume formed by cake forgings, m 3 D is the final diameter of the blank, m, H is the thickness of the in-vivo forging zone, m, H is the thickness of the in-vitro forging zone, and m.
In summary, the main dimensional parameters of the blank 7 for forming the cake forging provided in the present embodiment are the thickness H of the internal forging zone, the diameter D of the internal forging zone, the thickness H of the external forging zone, and the outer diameter D of the external forging zone of the blank 7, which can be determined by the above method, so as to obtain the overall dimensional parameters of the blank 7, and it should be noted that, since the external forging zone 72 is disposed at the edge of the internal forging zone 71, the inner diameter of the external forging zone is equal to the diameter D of the internal forging zone.
It should be noted that, in addition to requiring as little forming force as possible, the in-vitro forging requires controlling the flow state of the metal, avoiding the metal in the in-vitro forging zone 72 of the blank 7 flowing toward the in-vivo forging zone, which forms a serious fold, which is a difficult problem in the process control of the in-vitro forging method, and in-vitro forging, the reduction of pressure causes the forging difficulty to be increased, and if the forging starts from the edge of the in-vitro forging zone 72, the metal in the position is limited by the inside and outside, and the forming force is not required. Therefore, when the blank 7 having the above-described structure is used for in-vitro forging of cake forgings, forging the blank 7 by the hammer head 2 includes the steps of: the blank 7 is forged in turns from the edge of the external forging zone 72, and the pressing amount of each turn is 85 mm-110 mm.
In order to be able to forge the in vitro forging zone 72 sufficiently, this can be achieved by controlling the overlap of the hammerhead 2, in particular by the overlap of the hammerhead 2 being 1/3 to 1/2 of the width of the hammerhead 2 in two adjacent turns.
Alternatively, the movement amount of the forging stage 3 may be controlled, specifically, the ratio of the movement amount of the forging stage to the width of the hammer head in two adjacent turns is 1/2 to 3/4.
For the production of the above-described blank 7, the following method may be adopted:
step 1: upsetting an original blank in forging equipment, and then stretching (e.g. spinning stretching) by adopting a flat hammer head to obtain a blank to be processed, wherein in the upsetting process, the blank can be upset to the maximum diameter which can be upset by the maximum load of the forging equipment, and for ten-thousand-ton forging equipment, the blank can be upset to the diameter of 4.5-5.0 m;
step 2: the blank 7 is produced by forging the central region of the blank to be treated to form an in-vivo forging zone 71, the non-dished and finished portion being an in-vitro forging zone 72.
Specifically, in step 1 of the above-described method for producing the blank 7, the widening includes the steps of:
step 11: preliminary stretching is carried out on the original blank after upsetting to obtain a preliminary stretched blank, and a boss (for example, a cylindrical boss) is reserved in the center of the preliminary stretched blank;
step 12: and flattening the bulges by adopting a flat cover plate.
The widening adopts the method, which is beneficial to the deformation dead zone generated during the clearing.
To further facilitate removal of deformation dead zones, the diameter D of the protrusions t And initially widening the diameter D of the blank c The ratio is 1: 2-5 (e.g., 1:3), thickness H of the protrusions t And initially stretching the thickness H of the blank c The ratio (thickness excluding the protrusions) is 1:2 to 5 (e.g., 1:3).
For step 2, it comprises the following steps:
step 21: one surface of the blank to be processed is notched by adopting a strip-shaped hammer (namely a double sector-shaped hammer) to enable the diameter of the blank to be processed to grow up rapidly, then, finishing is carried out by adopting a round hammer to obtain a single-surface notched blank, and the fact that after the firing is finished, the diameter of the single-surface notched blank reaches the maximum blank size which can be forged in a water forging device body is needed;
step 22: turning the single-sided concave-opened blank by 180 degrees, and backing a bottom pad on the single-sided concave-opened blank, wherein the other side of the blank to be processed adopts a round hammer head to shift, so as to form an internal forging area 71, and the non-concave-opened and finishing part is an external forging area 72, so that a blank 7 is prepared, and the diameter of the blank to be processed after shifting is unchanged.
This is because, in the step 3, the method of forming the recess by the strip-shaped hammer head and finishing by the round hammer head is adopted, so that the surface quality of the finished single-sided recess-forming blank can be improved, and the recess forming and finishing efficiency can be improved.
In order to ensure that the position of each pass of the connecting hammer can be pressed in the next pass, avoiding the condition of position missing pressing, in the concave sinking process, the rotation angle of each pass of the strip hammer is sequentially 0 degree, 90 degree, 45 degree, 90 degree, 22.5 degree, 90 degree, 45 degree, 90 degree, 11.25 degree, 90 degree, 45 degree and 90 degree, wherein each pass is a step hammer period, a step hammer period adopts symmetrical pressing hammers, and the pressing amount of each pass is 80-100 mm. Therefore, by adopting the step hammer mode, the position of the hammer can be pressed in the next pass, and the condition of position missing pressing is avoided.
It is noted that, in the movement process of the movable cross beam 4, the movement of the movable cross beam 4 is up-down movement, the movement of the beam body 1 is a composite movement of up-down movement and rotation, in order to compensate the movement difference between the movable cross beam 4 and the beam body 1, the tool auxiliary tool further comprises a beam body connecting piece, the movable cross beam 4 is connected with the beam body 1 through the beam body connecting piece, specifically, the beam body connecting piece comprises an upper beam body connecting plate 5 and a lower beam body connecting plate 6 hung below the upper beam body connecting plate 5, cylindrical surface contact is formed between the upper beam body connecting plate 5 and the lower beam body connecting plate 6, the upper beam body connecting plate 5 is fixedly connected with the movable cross beam 4, and the lower beam body connecting plate 6 is fixedly connected with the beam body 1. Like this, through setting up the roof beam body connecting piece between movable cross beam 4 and roof beam body 1, the face of cylinder slip between roof beam body connecting plate 5 and the roof beam body connecting plate 6 in the roof beam body connecting piece can compensate the motion difference between movable cross beam 4 and the roof beam body 1 for roof beam body 1 and movable cross beam 4 follow-up realizes certain amplitude swing and rotation, changes the rigid connection between roof beam body 1 and the movable cross beam 4 into the face of cylinder flexonics, avoids movable cross beam 4 and roof beam body 1 to produce too big strong torque in junction.
In order to ensure smoothness of cylindrical surface sliding between the upper beam body connecting plate 5 and the lower beam body connecting plate 6, the convex radius of the upper beam body connecting plate 5 is smaller than the concave radius of the lower beam body connecting plate 6, and the ratio of the convex radius of the upper beam body connecting plate 5 to the concave radius of the lower beam body connecting plate 6 is, for example, 0.9 to 0.98:1. this is because, by limiting the ratio of the convex radius of the upper beam body connecting plate 5 to the concave radius of the lower beam body connecting plate 6 to the above range, not only the smoothness of sliding between the upper beam body connecting plate 5 and the lower beam body connecting plate 6 but also the contact area of the upper beam body connecting plate 5 and the lower beam body connecting plate 6 can be ensured, thereby effectively withstanding the impact load.
It should be noted that the design of the convex radius of the upper beam body connecting plate 5 depends on the maximum unbalanced load center distance of the forging equipment and the maximum inclination angle of the bearing plate, and the larger the maximum inclination angle is, the larger the convex radius of the upper beam body connecting plate 5 is required, specifically, the convex radius of the upper beam body connecting plate 5 is calculated by adopting the following formula:
δ＝R×sinα
delta is the maximum unbalanced load center distance of forging equipment, R is the convex radius of the upper beam body connecting plate 5, and alpha is the maximum inclination angle of the bearing plate.
It is also worth noting that the movement of the beam body 1 is rotation, in order to ensure that the working surface of the hammer head 2 can be better contacted with the blank 7, the tool further comprises a hammer head connecting piece, the hammer head 2 is connected with the forging side of the beam body 1 through the hammer head connecting piece, specifically, the hammer head connecting piece comprises an upper hammer head connecting plate 9 and a lower hammer head connecting plate 10 hung below the upper hammer head connecting plate 9, spherical contact is formed between the upper hammer head connecting plate 9 and the lower hammer head connecting plate 10, the upper hammer head connecting plate 9 is fixedly connected with the forging side of the beam body 1, and the lower hammer head connecting plate 10 is fixedly connected with the hammer head 2. This is because, cake class forging highly reduces gradually in the deformation process, along with the reduction of tup 2 increases, the roof beam body 1 can take place the tilting of certain degree, through setting up the tup connecting piece between the forging side of tup 2 and roof beam body 1, the sphere slip between upper tup connecting plate 9 and the lower tup connecting plate 10 in the tup connecting piece, can change the rigid connection between the forging side of tup 2 and roof beam body 1 into cylinder flexonics for tup 2 can take place the swing of certain degree, guarantee the forging face of the axis perpendicular to blank 7 of tup 2, be the face contact between the forging face of tup 2 and blank 7, improve the quality of the obtained cake class forging of forging.
In order to ensure the smoothness of the spherical sliding between the upper hammer head connecting plate 9 and the lower hammer head connecting plate 10, the convex radius of the upper hammer head connecting plate 9 is smaller than the concave spherical radius of the lower hammer head connecting plate 10, and the ratio of the convex radius of the upper hammer head connecting plate 9 to the concave spherical radius of the lower hammer head connecting plate 10 is, for example, 0.9-0.98: 1. this is because, by limiting the ratio of the convex radius of the upper hammer head connecting plate 9 to the concave spherical radius of the lower hammer head connecting plate 10 within the above-described range, not only the smoothness of the spherical sliding between the upper hammer head connecting plate 9 and the lower hammer head connecting plate 10 can be ensured, but also the contact area of the upper hammer head connecting plate 9 and the lower hammer head connecting plate 10 can be ensured, thereby effectively resisting the impact load.
For the connection between the non-forging side of the beam body 1 and the mounting surface of the forging equipment, in order to buffer the impact received by the non-forging side, the tool auxiliary tool further comprises an elastic box 8, and the non-forging side of the beam body 1 is supported on the mounting surface of the forging auxiliary tool through the elastic box 8. Like this, through the setting of elastic box 8, when movable cross beam 4 downward movement and apply the load to roof beam body 1, the non-forging side of roof beam body 1 can earlier with elastic box 8 contact, and elastic box 8 can carry out flexible support to the non-forging side of roof beam body 1, can cushion the impact that non-forging side received through the elastic deformation of elastic box 8 to avoid the frock of leading to by the impact to assist the utensil and take place to fracture, play the effect of protecting the frock and assist the utensil, extension frock assists the life of utensil.
Specifically, the elastic box 8 includes a box 81, a box cover 82, a spring 83 (for example, the spring 83 includes a plurality of disc springs axially arranged along the spring 83, the plurality of disc springs form a set of springs 83) and a guide post 84, one end of the guide post 84 is supported at the bottom of the box 81 by the spring 83, the box cover 82 covers the other end of the guide post 84, a gap is provided between the box 81 and the box cover 82, the box 81 is arranged on a mounting surface of forging equipment, and a non-forging side of the beam 1 is supported on the box cover 82. Thus, the cover 82 is supported on the case 81 by the springs 83 and the guide posts 84 with a certain gap therebetween, when the movable cross beam 4 moves downward and applies a load to the beam 1, the springs 83 shorten so that the cover 82 moves in a direction approaching the case 81, when the movable cross beam 4 moves upward without applying a load to the beam 1, the springs 83 lengthen so that the cover 82 moves in a direction away from the case 81, and elastic deformation of the elastic case 8 is imparted by providing the springs 83 between the case 81 and the cover 82.
Considering that the deformation direction of the spring 83 and the movement direction of the guide post 84 affect the movement stability of the non-forging sides of the case cover 82 and the beam body 1, the above-mentioned elastic case 8 further includes a spring guide 85 provided in the case body 81 and a guide post guide 86 provided in the case cover 82, the spring 83 is partially disposed in the spring guide 85, the other end of the guide post 84 is inserted into the guide post guide 86, and for the shapes of the spring guide 85 and the guide post guide 86, the shapes of both may be cylindrical, for example. Like this, can lead the deformation direction of spring 83 through spring guide cylinder 85, reduce the rocking and the slope of spring 83 in the deformation process, can lead the direction of motion of guide pillar 84 through guide pillar guide cylinder 86, reduce the rocking and the slope of guide pillar 84 in the motion process to can guarantee the motion stability of the non-forging side of case lid 82 and roof beam body 1.
It is also worth noting that during the movement of the movable cross beam 4, torque will be present between the beam 1 and the elastic box 8, so that the tool auxiliary tool further comprises a box connector, the non-forging side of the beam 1 is connected with the elastic box 8 through the box connector, specifically, the box connector comprises an upper box connector 87 and a lower box connector 88 hung below the upper box connector 87, the upper box connector 87 and the lower box connector 88 are in cylindrical surface contact, the upper box connector 87 is fixedly connected with the non-forging side of the beam 1, and the lower box connector 88 is fixedly connected with the elastic box 8 (i.e. the box cover 82). Like this, through setting up the box connecting piece between the non-forging side of the roof beam body 1 and the elastic box 8, the face of cylinder slip between upper box connecting plate 87 and the lower box connecting plate 88 in the box connecting piece can compensate the motion difference between the non-forging side of the roof beam body 1 and the elastic box 8 for the non-forging side of the roof beam body 1 and the elastic box 8 follow-up realizes certain range swing and rotation, changes the rigid connection between the non-forging side of the roof beam body 1 and the elastic box 8 into the face of cylinder flexonics, avoids the non-forging side of the roof beam body 1 and the elastic box 8 to produce too big strong torque in junction.
In order to ensure smoothness of cylindrical surface sliding between the upper case connecting plate 87 and the lower case connecting plate 88, the convex radius of the upper case connecting plate 87 is smaller than the concave radius of the lower case connecting plate 88, and the ratio of the convex radius of the upper case connecting plate 87 to the concave radius of the lower case connecting plate 88 is, for example, 0.9 to 0.98:1. this is because, by limiting the ratio of the convex radius of the upper case connecting plate 87 to the concave radius of the lower case connecting plate 88 to the above-described range, not only smoothness of the cylindrical surface sliding between the upper case connecting plate 87 and the lower case connecting plate 88 can be ensured, but also the contact area of the upper case connecting plate 87 and the lower case connecting plate 88 can be ensured, thereby effectively withstanding the impact load.
In order to forge each part of the blank 7, the tool auxiliary tool further comprises a rotating platform 11 for driving the blank 7 to rotate, wherein the rotating platform 11 is arranged obliquely below the hammer head 2, and one side of the forging platform 3. That is, the rotary table 11 is used only for supporting and rotating the blank 7, and the rotary table 11 does not receive the load of the hammer head 2 during forging of the blank 7 by the hammer head 2. Illustratively, the rotary platform 11 may be rotated in a pneumatic, hydraulic or externally powered transmission.
Considering that the forging stage 3 is in a stationary state and the rotary stage 11 is in a rotary state during forging, the side of the forging stage 3 facing the rotary stage 11 conforms to the rotary stage 11 in order to avoid interference between the two. Illustratively, the shape of the rotary table 11 is circular, the diameter of the rotary table 11 is smaller than that of the blank 7, the side of the forging table 3 facing the rotary table 11 is circular arc-shaped, and the overall shape of the forging table 3 may be crescent-shaped. In this way, during the rotation of the rotary table 11, the forging table 3 does not interfere with the rotation of the rotary table 11; in addition, the forging platform 3 and the rotating platform 11 adopting the structure can also reduce the diameter of the rotating platform 11, and effectively solve the problem of how to place the blank 7 on the table top of the turntable when feeding the portal crane.
It should be noted that, in the past, the tool for forging is assisted and is equipped with, be rigid connection between each part, the loss to forging equipment and tool are assisted and are great, the external forging method of cake class forging that this embodiment provided, through setting up of roof beam body connecting piece, tup connecting piece and box connecting piece, be sphere or cylinder contact between roof beam body 1 and movable cross beam 4, tup 2 and the elastic box 8, can all be converted into flexonics with the connection between roof beam body 1 and movable cross beam 4, tup 2 and the elastic box 8, thereby guarantee the relative slip and the rotation between the four, when realizing the biography power, furthest's guarantee the stability and the high efficiency of tool assistance, engineering application and the mass production of super-large cake class forging of realization external forging provide technical guarantee.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present invention should be included in the scope of the present invention.
Claims (10)
1. An in-vitro forging method of cake forgings is characterized by comprising the following steps:
smelting raw materials to obtain a steel ingot;
cogging the steel ingot to obtain a blank;
the upper end face of a beam body of forging equipment is connected with a movable cross beam of the forging equipment, one end of the beam body is a forging side, a hammer head is arranged on the forging side of the beam body, the other end of the beam body is a non-forging side, the non-forging side of the beam body is connected with a mounting face of the forging equipment, a forging platform of the forging equipment is arranged under the hammer head, a blank is arranged on the forging platform, and the forging side of the beam body is positioned outside an area surrounded by a stand column of the forging equipment;
starting forging equipment, wherein the forging side rotates around the non-forging side in the moving process of the movable cross beam, and the hammer head forges the blank to obtain a cake forging;
the blank comprises an internal forging area and an external forging area positioned at the edge of the internal forging area; the in-vivo forging zone diameter d is calculated by adopting the following formula:
wherein D is 2 Is the column spacing, m, L of forging equipment 2 For extending the column to the transverse distance m, L from the center of the forging equipment 1 The transverse distance between the hammer head and the center of forging equipment is m, and D is the final diameter of the blank and m;
the non-forging side of the beam body is supported on the mounting surface of forging equipment through an elastic box;
the non-forging side of the beam body is connected with the elastic box through a box connecting piece, the box connecting piece comprises an upper box connecting plate and a lower box connecting plate hung below the upper box connecting plate, cylindrical surface contact is formed between the upper box connecting plate and the lower box connecting plate, the upper box connecting plate is fixedly connected with the non-forging side of the beam body, and the lower box connecting plate is fixedly connected with the elastic box.
2. The method of in vitro forging a cake-like forging according to claim 1, wherein during the movement of the movable cross member, the forging side rotates around the non-forging side, the beam body and the movable cross member constitute a shoulder pole beam, the load applied to the beam body by the movable cross member is transmitted to a hammer head located on the forging side of the beam body, and the hammer head forges the blank.
3. The method for in vitro forging a cake-like forging according to claim 1, wherein,
the thickness of the internal forging area is smaller than that of the external forging area, and the thickness of the internal forging area is the final size of forming the cake forging;
the cross section of the blank along the axial direction is I-shaped.
4. An in vitro forging method of cake-like forgings according to claim 3, wherein said forging of the blank by the hammer head comprises the steps of: forging is performed from the edge of the outer forging zone of the blank in a circle-by-circle manner.
5. The method for in vitro forging of cake forgings according to claim 4, wherein the overlap of the hammerhead is 1/3-1/2 of the width of the hammerhead in two adjacent circles;
or in two adjacent circles, the ratio of the movement amount of the forging platform to the width of the hammer head is 1/2-3/4.
6. An in vitro forging method of cake-like forgings according to claim 3, characterized in that the method of making the blank comprises the steps of:
step 1: upsetting and widening the original blank in forging equipment to obtain a blank to be processed;
step 2: forging the central area of the blank to be processed to form an internal forging area, wherein the non-notched and finishing part is an external forging area, so that the blank is prepared.
7. The method of in vitro forging of cake-like forgings according to claim 6, wherein in step 1, said stretching comprises the steps of:
step 11: preliminary stretching is carried out on the original blank after upsetting to obtain a preliminary stretched blank, and a boss is reserved in the center of the preliminary stretched blank;
step 12: flattening the bulges.
8. The method of in vitro forging a cake-like forging according to claim 7, wherein a ratio of a diameter of said protrusion to a diameter of said preliminary widened blank is 1:2 to 5;
the ratio of the thickness of the bulge to the thickness of the preliminary broadening blank is 1:2 to 5.
9. The method of in vitro forging of cake-like forgings according to claim 6, wherein said step 2 comprises the steps of:
step 21: a strip-shaped hammer head is adopted to open the concave on one surface of the blank to be processed, and then finishing is carried out, so that a blank with a single-surface open concave is obtained;
step 22: turning the single-sided concave-opened blank by 180 degrees, cushioning the single-sided concave-opened blank with a bottom cushion, and shifting the other side of the blank to be processed by adopting a round hammer to form an internal forging area, wherein the part which is not concave-opened and is finished is an external forging area, so that the blank is prepared.
10. The method according to claim 9, wherein the rotation angle of each pass of the strip hammer head is 0 °, 90 °, 45 °, 90 °, 22.5 °, 90 °, 45 °, 90 °, 11.25 °, 90 °, 45 ° and 90 ° in order during the dimple forming process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110230023.1A CN113617999B (en) | 2021-03-02 | 2021-03-02 | In-vitro forging method of cake forging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110230023.1A CN113617999B (en) | 2021-03-02 | 2021-03-02 | In-vitro forging method of cake forging |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113617999A CN113617999A (en) | 2021-11-09 |
| CN113617999B true CN113617999B (en) | 2023-06-20 |
Family
ID=78377826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110230023.1A Active CN113617999B (en) | 2021-03-02 | 2021-03-02 | In-vitro forging method of cake forging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113617999B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114346159B (en) * | 2022-01-07 | 2023-01-03 | 上海交通大学 | External forging equipment for large disc type component and forging method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1385689A (en) * | 1963-12-21 | 1965-01-15 | English Steel Corp Ltd | Large size forgings manufacturing process |
| EP0059038A2 (en) * | 1981-02-24 | 1982-09-01 | GKN Forgings Limited (formerly known as GKN Shardlow Limited) | Method of forging heavy articles |
| CN103286249A (en) * | 2013-06-13 | 2013-09-11 | 中国石油大学(华东) | Variable-speed circumferential low-stress bending fatigue crack precise blanking machine and blanking method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB892736A (en) * | 1959-07-31 | 1962-03-28 | Adrema Werke Gmbh | Method of and apparatus for producing depth-hardenable embossing types for address plate embossing machines |
| CN203197029U (en) * | 2013-04-12 | 2013-09-18 | 海安县威仕重型机械有限公司 | Integral casting device for great-inner-diameter deep-blind-hole cylinder body |
| CN105414428A (en) * | 2015-12-09 | 2016-03-23 | 东南大学 | Forging technique for cake forgings |
| CN209792509U (en) * | 2019-02-03 | 2019-12-17 | 青岛天邦机械制造有限公司 | Forging die for forging of agricultural machinery forging |
| CN211360514U (en) * | 2019-11-25 | 2020-08-28 | 揭阳市光丰钢业有限公司 | Roll blank forging device |
-
2021
- 2021-03-02 CN CN202110230023.1A patent/CN113617999B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1385689A (en) * | 1963-12-21 | 1965-01-15 | English Steel Corp Ltd | Large size forgings manufacturing process |
| EP0059038A2 (en) * | 1981-02-24 | 1982-09-01 | GKN Forgings Limited (formerly known as GKN Shardlow Limited) | Method of forging heavy articles |
| CN103286249A (en) * | 2013-06-13 | 2013-09-11 | 中国石油大学(华东) | Variable-speed circumferential low-stress bending fatigue crack precise blanking machine and blanking method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113617999A (en) | 2021-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100584482C (en) | Method for rolling and shaping titanium alloy special-shaped ring forging | |
| CN100418698C (en) | Forming processing method for large-scale loop-forming element | |
| CN113617999B (en) | In-vitro forging method of cake forging | |
| CN101920302A (en) | Electroplastic self-piercing riveting device | |
| CN101934338B (en) | Electroplastic rivet-free riveting device | |
| CN107243514B (en) | A kind of light-alloy cup shell rotary extrusion forming method | |
| CN113617996B (en) | In-vitro forging method of ring forging | |
| CN113617997B (en) | Tool auxiliary tool for external forging and forging equipment | |
| CN216729363U (en) | Nested overturning combined anvil die for forging large crank | |
| CN113617998B (en) | Blank for tube plate forming, manufacturing method thereof and tube plate in-vitro forging method | |
| CN104550607A (en) | Rotary forge forming die and rotary forge forming method | |
| CN214417577U (en) | Utensil and forging and pressing equipment are assisted to external forging frock | |
| CN100361830C (en) | Automobile integral drive axle housing and manufacturing method thereof | |
| CN214392165U (en) | Elastic box for external forging assistive device and external forging assistive device | |
| CN113618001B (en) | External forging elastic box and external forging auxiliary tool | |
| CN214417581U (en) | Movable lifting beam for auxiliary tool for external forging and auxiliary tool for external forging | |
| CN114309428A (en) | Forging process of large crank throw and crank neck | |
| CN102029338B (en) | Rolling and forming method for 0Cr25Ni20 stainless steel thin-wall ring | |
| CN115026234A (en) | Forging tool and forging forming method for cake-shaped universal mill vertical roll | |
| CN210080625U (en) | Flexible punch arm for forging | |
| CN113714446A (en) | Axial closed rolling forming device and method for large-diameter-thickness-ratio metal thin circular plate | |
| CN205673521U (en) | Die holder | |
| CN110033907A (en) | A kind of spherical manufacturing method with channel-section steel cap of suspension insulator | |
| RU2209702C2 (en) | Method for making different-thickness sheet products | |
| CN216729145U (en) | Stamping forming tool for seal head |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |