CN113426851B

CN113426851B - Shape correction tool and shape correction method for forge piece

Info

Publication number: CN113426851B
Application number: CN202110755052.XA
Authority: CN
Inventors: 李强; 边毅
Original assignee: Beijing Hangxing Machinery Manufacturing Co Ltd
Current assignee: Beijing Hangxing Machinery Manufacturing Co Ltd
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2023-03-24
Anticipated expiration: 2041-07-02
Also published as: CN113426851A

Abstract

The invention relates to a shape correcting tool and a shape correcting method for a forge piece, belongs to the technical field of shape correcting of forge pieces, and solves the technical problems that in the prior art, a special shape correcting die needs to be manufactured for forge piece shape correcting, and the universality of the shape correcting die is poor. The invention provides a forging piece shape correcting tool which comprises a forging piece pressing unit, a forging piece supporting unit and a forging piece fixing unit, wherein the forging piece pressing unit is used for pressing a forging piece; the shape correcting target forge piece and the standard forge piece are placed on the forge piece supporting unit in parallel, and the forge piece supporting unit is used for supporting the shape correcting target forge piece and the standard forge piece; the forging fixing unit is used for fixing the shape correction target forging and the standard forging; the forging piece pressing unit is used for applying pressure to the shape correction target forging piece, so that the shape of the shape correction target forging piece is the same as that of the standard forging piece after being corrected. The shape correcting tool is high in applicability, and can be used for correcting shapes of shape correcting target forgings with different sizes.

Description

Shape correction tool and shape correction method for forge piece

Technical Field

The invention relates to the technical field of forging piece shape correction, in particular to a shape correction tool and a shape correction method for a forging piece.

Background

When products such as tools and forgings used industrially are used for a long time, the body is deformed due to repeated action of an acting force such as thermal stress and mechanical stress, and if the products are used continuously, the body needs to be corrected.

Because the product structures are different, forces in multiple directions need to be applied for shape correction after deformation, and the typical practice in reality is to design a special die for shape correction according to the structure of a single product. However, since the manufacturing cost of the mold is high, when various products need to be corrected, the technical scheme of correcting by manufacturing the special correction mold is not feasible.

In addition, there are also some prior art that use simpler shape correction tools and methods, usually by placing the product to be corrected on a flat surface and striking it with a hammer, or in the middle of a vise and squeezing it with the vise. The common disadvantage of the two shape correction methods is that the deformation cannot be accurately controlled, and the shape correction can be completed only after repeated beating and comparison.

Disclosure of Invention

In view of the above analysis, the present invention aims to provide a shape correction tool for a forging and a shape correction method, so as to solve the technical problems that most of the existing shape correction tools are dedicated shape correction tools, the manufacturing cost is high, and the existing shape correction tools cannot be used universally.

The purpose of the invention is mainly realized by the following technical scheme:

on one hand, the invention provides a forging piece shape correcting tool which comprises a forging piece pressing unit, a forging piece supporting unit and a forging piece fixing unit;

the shape correcting target forge piece and the standard forge piece are placed on the forge piece supporting unit in parallel, and the forge piece supporting unit is used for supporting the shape correcting target forge piece and the standard forge piece;

the forging fixing unit is used for fixing the shape correction target forging and the standard forging;

the forging piece pressing unit is used for applying pressure to the shape correction target forging piece, so that the shape of the shape correction target forging piece is the same as that of the standard forging piece after being corrected.

In one possible design, the forging pressing unit comprises a multi-ram press;

the multi-press-head press comprises a press main body, a plurality of supporting legs and a plurality of independent hydraulic rods; the press machine main body is arranged above the base through a plurality of supporting legs, and the first end of the independent hydraulic rod is arranged on the lower end face of the press machine main body;

the base is also provided with a press workbench which is arranged in the middle of the plurality of supporting legs;

the forging supporting unit is arranged on a working table of the press, the shape correction target forging and the standard forging are arranged on the forging supporting unit and are located below the independent hydraulic rods, and the independent hydraulic rods can independently or simultaneously correct the shape of the shape correction target forging by applying pressure.

In one possible design, the forging supporting unit comprises a cuboid working part, and a V-shaped groove is formed in the middle of the top of the working part;

the shape correction target forging and the standard forging are arranged in the V-shaped groove in parallel.

In one possible design, a controller is connected to the press body;

a plurality of independent stroke control programs are embedded in the controller; the number of the independent stroke control programs is the same as that of the independent hydraulic rods, and the independent stroke control programs and the independent hydraulic rods are controlled in a one-to-one correspondence manner;

a displacement sensor is arranged on the independent hydraulic rod; the displacement sensor is used for recording the stroke of the independent hydraulic rod.

In one possible design, the forge piece fixing unit comprises a transverse clamping structure, and the transverse clamping structure comprises a clamping block, a fixing block and a spiral ejector rod; the number of the clamping blocks, the number of the fixed blocks and the number of the spiral ejector rods are equal and are all multiple;

the clamping blocks are arranged on two sides of the shape correction target forging and the standard forging and are used for clamping the shape correction target forging and the standard forging; the fixed blocks are fixed on two sides of the working part;

the first end of the spiral ejector rod is fixedly connected with the clamping block; the second end of the spiral ejector rod penetrates through the fixed block and is in threaded connection with the fixed block;

the second end of the spiral ejector rod is provided with a wrench, and the distance between the fixing block and the clamping block can be adjusted through the wrench and the spiral ejector rod.

In one possible design, the correction target forge piece is an opening forge piece and comprises a V-shaped opening forge piece, a U-shaped opening forge piece and a semi-arc opening forge piece; the standard forging is a corresponding standard forging;

the second end of the independent hydraulic rod is provided with an independent hydraulic head; an adjustable pressing plate structure is detachably arranged on the lower end face of the independent hydraulic head;

the adjustable pressing plate structure comprises a T-shaped pressing plate, the T-shaped pressing plate comprises a transverse part and a longitudinal part, and the transverse part of the T-shaped pressing plate is detachably connected with the independent hydraulic head;

and the longitudinal part of the T-shaped pressing plate is provided with an arc structure, and the arc structure is used for contacting and pressing the shape correction target forging.

In one possible design, the top end of the edge of the V-shaped groove is in transition through a round angle;

the middle position of the bottom of the V-shaped groove is in round angle transition.

In one possible design, a plurality of grooves which are parallel to each other and have the same structure are arranged on the lower end surface of the independent hydraulic head; the transverse part of the T-shaped pressing plate can be embedded into different grooves.

In one possible design, the plurality of independent hydraulic levers includes a first independent hydraulic lever, a second independent hydraulic lever, and a third independent hydraulic lever;

a first independent hydraulic head is arranged on the first independent hydraulic rod, and a second independent hydraulic head is arranged on the second independent hydraulic rod; a third independent hydraulic head is arranged on the third independent hydraulic rod;

a first T-shaped pressing plate is arranged on the lower end face of the first independent hydraulic head, a second T-shaped pressing plate is arranged on the lower end face of the second independent hydraulic head, a third T-shaped pressing plate is arranged on the lower end face of the third independent hydraulic head, and the transverse parts of the first T-shaped pressing plate, the second T-shaped pressing plate and the third T-shaped pressing plate are identical in structure;

the longitudinal parts of the first T-shaped pressing plate and the third T-shaped pressing plate are identical in structure and are smaller than the height of the longitudinal part of the second T-shaped pressing plate.

In a possible design, a plurality of grooves which are parallel to each other and have the same structure are arranged on the lower end faces of the first independent hydraulic head, the second independent hydraulic head and the third independent hydraulic head.

In one possible design, the transverse portion of the first T-shaped platen can be inserted into different grooves on the lower end face of the first independent hydraulic head;

the transverse part of the second T-shaped pressing plate can be embedded into different grooves on the lower end face of the second independent hydraulic head;

the transverse part of the third T-shaped pressure plate can be embedded into different grooves on the lower end face of the third independent hydraulic head.

In one possible design, the correction target forge piece comprises a closed arc-shaped cylinder structure forge piece with two open end surfaces, and the standard forge piece is a cylinder structure standard forge piece;

the multi-pressure head press also comprises a plurality of transverse connecting rods, and the transverse connecting rods penetrate through the shape correction target forge piece and the standard forge piece; two ends of the transverse connecting rod are respectively detachably connected with the second ends of the independent hydraulic rods; the independent hydraulic rod is vertical to the transverse connecting rod;

and the hydraulic rod drives the transverse connecting rod to press downwards so as to correct the shape of the shape correction target forging.

In one possible design, the plurality of independent hydraulic levers includes a first hydraulic lever, a second hydraulic lever, and a third hydraulic lever; the length of first hydraulic stem and third hydraulic stem equals and all is less than the length of second hydraulic stem.

In one possible design, the plurality of cross links includes a first cross link, a second cross link, and a third cross link; the first transverse connecting rod, the second transverse connecting rod and the third transverse connecting rod are the same in length;

the first transverse connecting rod and the third transverse connecting rod are arranged on two sides of the second transverse connecting rod.

In one possible design, corresponding marks are arranged on the end faces of the shape correction target forging adjacent to the standard forging;

and the mark is used for ensuring that the setting angle and the setting position of the correction target forging and the standard forging are kept the same.

In one possible design, the sizing device further comprises a first roller structure and a second roller structure;

when the closed arc-shaped cylinder structure forged piece needs to be rotated, the second hydraulic rod is utilized to lift the shape correction target forged piece and the standard forged piece to a certain height, and the first roller structure and the second roller structure are respectively placed on the working part and are positioned right below the standard forged piece and the shape correction target forged piece;

the first roller structure and the second roller structure are used for rotating the shape correction target forge piece and the standard forge piece by a certain angle.

On the other hand, the invention also provides a forging piece shape correcting method, and the shape correcting tool comprises the following steps:

step 1, placing a standard forging in a V-shaped groove of a working part, and clamping the standard forging by using a clamping block and a fixing block;

step 2, controlling the stroke of an independent hydraulic rod on the multi-ram press through a controller, and recording the position of a stroke switch to a standard forging;

step 3, placing the shape correction target forging and the standard forging in parallel in a V-shaped groove of the working part, and clamping the shape correction target forging and the standard forging by using a clamping block and a fixing block; adjusting the travel switch back to the position corresponding to the standard forging, and simultaneously re-calibrating the shape-calibrated target forging by utilizing the arc structures of the adjustable pressure plates on the independent hydraulic rods to perform multiple shape calibrations;

step 4, removing the standard forging, increasing the stroke distance of the standard forging by 1-10mm, and then simultaneously re-applying pressure to the shape-corrected target forging by utilizing the circular arc structures of the adjustable pressure plates on the independent hydraulic heads to realize over-deformation;

step 5, putting the standard part into the V-shaped groove again, adjusting the travel switch back to the position corresponding to the standard forging, and applying pressure again until the shape correction target forging is the same as the standard forging in shape;

and 6, after the shape correction is finished, removing the clamping block and the fixing block to obtain an open forging structure with the same shape as the standard forging.

In a third aspect, the invention further provides a forging piece shape correcting method, which adopts the shape correcting tool and comprises the following steps:

step 3, placing the shape correction target forging and the standard forging in parallel in a V-shaped groove of the working part, and clamping the shape correction target forging and the standard forging by using a clamping block and a fixing block; adjusting the travel switch back to the position corresponding to the standard forging, and simultaneously re-calibrating the shape-calibrated target forging by utilizing the transverse connecting rods on each independent hydraulic rod to perform multiple shape calibrations;

step 4, removing the standard forging, increasing the stroke distance of the standard forging by 1-10mm, and then simultaneously re-applying pressure to the shape correction target forging by utilizing the transverse connecting rods on the independent hydraulic rods to realize over-deformation;

and 6, after the shape correction is finished, removing the clamping block and the fixing block to obtain the closed arc-shaped cylinder structure forging with the two end faces in the opened state after the shape correction.

Compared with the prior art, the invention can realize at least one of the following beneficial effects:

(1) When the shape of a shape correction target forging is corrected in the prior art, the shape correction is carried out through a special shape correction die for design, however, the special die for the structural design of a single forging product has two problems: on one hand, the manufacturing of the special die increases the cost of shape correction, once the special die is processed, the structure is difficult to adjust, a fixed structure is formed, the reverse deformation amount is difficult to optimize, and the shape correction process is difficult to optimize; on the other hand, when various forging product structures exist, different sizing dies need to be manufactured, and therefore the problem that the sizing die placement space is increased is solved. Compared with the prior art, the shape correcting tool provided by the invention is not only suitable for a V-shaped opening forge piece, but also suitable for a U-shaped opening forge piece and a semi-arc opening forge piece.

(2) The invention adopts the standard forging as the correction reference, can ensure that the corrected precision of the correction target forging is high, and becomes the standard forging.

(3) Compared with the prior art, the rectangular working part is arranged on the press workbench, and the V-shaped groove is arranged in the middle of the top surface of the working part, so that the shape correction target forge piece and the standard forge piece can be supported more stably, the shape correction target forge piece and the standard forge piece can be prevented from shaking during shape correction, and the V-shaped groove is also beneficial to accurate shape correction of the shape correction target forge piece based on the standard forge piece.

(4) In the prior art, when the shape of the cylinder forging is corrected, a special mold is mostly adopted, and the problems of difficulty in optimization of the shape correcting process, high cost and increase of the mold placing space are caused by manufacturing the special shape correcting mold. Compared with the prior art, the shape correction tool provided by the invention is simple in structure and strong in universality, can be suitable for correcting closed arc-shaped cylinder structure forgings with openings at two ends and different inner diameter sizes, does not need to manufacture a special shape correction die for each product, and greatly saves the cost.

(5) According to the invention, the standard forging and the shape correction target forging are arranged in the V-shaped groove of the working part, and during shape correction, the maximum deviation between the shape correction target forging and the standard forging is within 2mm after the shape correction target forging and the standard forging are approximately the same in shape through the independent stroke control program arranged on the independent hydraulic rod, so that the shape correction accuracy is ensured.

In the invention, the technical schemes can be combined with each other to realize more preferable combination schemes. 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 the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.

FIG. 1 is a schematic structural view of a multiple ram press;

FIG. 2 is a schematic view of the working section;

FIG. 3 is a schematic view of an adjustable platen structure and a lateral clamping structure;

FIG. 4 is a schematic structural view of a lateral clamping arrangement;

FIG. 5 is a schematic structural view of a semi-arc opening forging fixed to a working portion;

FIG. 6 is a first structural schematic diagram of shape correction of a closed arc-shaped cylinder structure forging;

FIG. 7 is a structural schematic diagram II of the shape correction of the closed arc-shaped cylinder structure forging;

FIG. 8 is a schematic view of a closed arcuate barrel structure forging rotated with a first roller structure and a second roller structure;

fig. 9 is a schematic structural diagram of a first roller structure.

Reference numerals:

1-a press body; 2-supporting legs; 3-independent hydraulic rod; 4-press workbench; 5-a base; 6-a working part; 7-V type groove; 8-an adjustable pressure plate structure; 9-standard forging; 10-correcting the shape of the target forging; 11-a clamping block; 12-fixing blocks; 13-a spiral ejector rod; 14-a wrench; 15-a transverse connecting rod; 16-closing the forging with the arc-shaped cylinder structure; 17-standard forging of a cylinder structure; 18-a first roller; 19-a second roller; 20-marking; 21-a base; 22-a first roller structure; 23-second roller configuration.

Detailed Description

The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and which together with the embodiments of the invention serve to explain the principles of the invention and not to limit its scope.

Example 1

The embodiment provides a forging shape correcting tool which comprises a forging pressing unit, a forging supporting unit and a forging fixing unit; the shape correction target forging 10 and the standard forging 9 are placed on the forging support unit in parallel, and the forging support unit is used for supporting the shape correction target forging 10 and the standard forging 9; the forging fixing unit is used for fixing the shape correction target forging 10 and the standard forging 9; the forging pressing unit is used for applying pressure to the shape correction target forging 10, so that the shape of the shape correction target forging 10 is the same as that of the standard forging 9 after being corrected.

Specifically, as shown in fig. 1 and fig. 2, the shape correction tool for a forging provided by the present embodiment includes a forging pressing unit, a forging supporting unit, and a forging fixing unit; the forging fixing units are arranged on two sides of the forging supporting unit and used for fixing the shape correction target forging 10 and the standard forging 9 which are placed on the forging supporting unit in parallel, and after the two forgings are fixed, the forging pressing unit is used for pressing the shape correction target forging 10, so that the deformed shape correction target forging 10 can be corrected.

In the prior art, when the shape of the cylinder forging is corrected, a special mold is mostly adopted, and the problems of difficulty in optimization of the shape correcting process, high cost and increase of the mold placing space are caused by manufacturing the special shape correcting mold. Compared with the prior art, the shape correcting tool provided by the embodiment is not only suitable for a V-shaped open-ended forging, but also suitable for a U-shaped open-ended forging, a semi-arc open-ended forging and a closed arc-shaped tubular structure forging with two open end faces.

In order to correct the deformed shape correction target forging 10, the forging pressing unit of the present embodiment includes a multi-ram press; the multi-pressure head press comprises a press main body 1, a plurality of supporting legs 2 and a plurality of independent hydraulic rods 3; the press machine main body 1 is arranged above the base 5 through a plurality of supporting legs 2, and the first end of the independent hydraulic rod 3 is arranged on the lower end face of the press machine main body 1; the base 5 is also provided with a press workbench 4, and the press workbench 4 is arranged in the middle of the plurality of supporting legs 2; the forging supporting unit is arranged on the press machine workbench 4, the shape correction target forging 10 and the standard forging are arranged on the forging supporting unit and located below the independent hydraulic rods 3, and the independent hydraulic rods 3 can independently or simultaneously correct the shape of the shape correction target forging 10 under the pressure.

Specifically, as shown in fig. 1, the forging pressing unit of the present embodiment includes a multiple ram press including a press main body 1, a plurality of support legs 2 (e.g., 4 support legs 2), and a plurality of independent hydraulic rods 3 (e.g., 3 independent

hydraulic rods

3 or 6 independent hydraulic rods 3); when the deformed correction target forging 10 is pressed, the base 5 is placed on a plane, and then the press machine main body 1 is supported above the base 5 through 4 support legs 2; the press main body 1 is rectangular, and the first end of the independent hydraulic rod 3 is arranged on the lower end face of the press main body (namely, the first end of the independent hydraulic rod 3 is fixedly connected with the bottom face of the press main body 1). It should be noted that a cuboid-shaped press workbench 4 is further arranged on the base 5, the press workbench 4 is arranged in a rectangle enclosed by 4 support legs 2, the forging support unit is arranged on the press workbench 4 and is located right below the independent hydraulic rod 3, after the forging support unit is arranged, the shape correction target forging 10 and the standard forging are placed on the forging support unit, and the shape correction target forging 10 is subjected to multiple-time pressure application and shape correction by using the independent hydraulic rod 3.

In the prior art, a simpler shape correction tool and a shape correction method are generally adopted, and a product to be corrected is usually placed on a plane and is beaten by a hammer or is placed in the middle of bench pliers and is extruded by the bench pliers. The common disadvantage of the two shape correction methods is that the deformation cannot be accurately controlled, and the shape correction can be completed only after repeated beating and comparison.

Compared with the prior art, the embodiment adopts the plurality of independent hydraulic rods 3 to press and shape the shape-correcting target forging 10, and each independent hydraulic rod 3 can respectively press the shape-correcting target forging 10.

In order to more stably support the shape correction target forging 10 and the standard forging, the forging support unit of the embodiment comprises a cuboid working part 6, and a V-shaped groove 7 is arranged in the middle of the top of the working part 6; the shape correction target forging 10 and the standard forging are arranged in the V-shaped groove 7 in parallel.

Specifically, the working portion 6 of the present embodiment is disposed on the press table 4, the working portion 6 is rectangular, and a V-shaped groove 7 is disposed in the middle of the top of the working portion 6, and the V-shaped groove 7 is used for accommodating the calibration target forging 10 and the standard forging. It should be noted that two side surfaces of the V-shaped groove 7 are arc surfaces of two tangent or intersected circles, a connection between the top ends of the two side surfaces of the V-shaped groove 7 and the plane of the working part 6 is in transition through a fillet, an opening angle of the V-shaped groove 7 is 45-180 degrees, and the application range of the V-shaped groove 7 can be improved by controlling the opening angle within the range.

The top end of the edge of the V-shaped groove is in transition through a fillet; the middle position of the bottom of the V-shaped groove is in round angle transition.

Compared with the prior art, the working part 6 of the cuboid is arranged on the press workbench 4, and the V-shaped groove 7 is arranged on the top surface of the working part 6, so that the shape correction target forging 10 and the standard forging can be supported more stably, and the shape correction target forging 10 and the standard forging are prevented from shaking when the shape correction is carried out.

In order to accurately control the pressing unit to correct the shape of the shape correction target forging 10, the main body 1 of the press machine is connected with a controller; a plurality of independent stroke control programs are embedded in the controller; the number of the independent stroke control programs is the same as that of the independent hydraulic rods 3, and the independent stroke control programs and the independent hydraulic rods are controlled in a one-to-one correspondence manner; a displacement sensor is arranged on the independent hydraulic rod 3; the displacement sensor is used to record the stroke of the individual hydraulic rod 3.

Specifically, the press machine main body 1 is connected with a controller, a plurality of independent stroke control programs are embedded in the controller, the number of the independent stroke control programs is the same as that of the independent hydraulic rods 3, namely, each independent hydraulic rod 3 is provided with an independent stroke control program, so that the stroke of each independent hydraulic rod 3 can be controlled independently; in addition, each independent hydraulic rod 3 is also provided with a displacement sensor, and the purpose of the displacement sensor is to record the stroke of the independent hydraulic rod 3.

Compared with the prior art, the embodiment can carry out accurate correction through setting up controller, independent stroke control procedure and displacement sensor.

In order to ensure that the shape correction target forging 10 is firmly fixed in the shape correction process, does not move or shake, ensures the smooth implementation of the shape correction process and ensures the shape correction result, the forging fixing unit of the embodiment comprises a transverse clamping structure, as shown in fig. 4, the transverse clamping structure comprises a clamping block 11, a fixed block 12 and a spiral ejector rod 13; the number of the clamping blocks 11, the number of the fixed blocks 12 and the number of the spiral ejector rods 13 are equal and are all multiple; the clamping blocks 11 are arranged on the two sides of the shape correction target forging 10 and the standard forging in the transverse direction and are used for clamping the shape correction target forging 10 and the standard forging; the fixed blocks 12 are fixed on two sides of the working part 6 in the transverse direction; the first end of the spiral ejector rod 13 is fixedly connected with the clamping block 11; the second end of the spiral ejector rod 13 penetrates through the fixed block 12 and is in threaded connection with the fixed block 12; a wrench 14 is arranged at the second end of the screw ejector rod 13, and the distance between the fixing block 12 and the clamping block 11 can be adjusted through the wrench 14 and the screw ejector rod 13.

Specifically, the forging fixing unit of the present embodiment includes a lateral clamping structure including a plurality of clamping blocks 11, a plurality of fixing blocks 12, and a plurality of screw jacks 13; for example, as shown in fig. 3 to 6, the transverse clamping structure of the present embodiment includes 4 clamping blocks 11, 4 fixing blocks 12, and 4 screw ejector rods 13, where two clamping blocks 11 are disposed on two sides of the shape correction target forging 10 in the transverse direction, and the other two clamping blocks 11 are disposed on two sides of the standard forging in the transverse direction; the 4 fixing blocks 12 are respectively arranged at two sides of the cuboid working part 6; the first end of the spiral ejector rod 13 is fixedly connected with the clamping block 11, and the second end of the spiral ejector rod 13 penetrates through the corresponding fixed block 12. It should be noted that the spiral ejector rod 13 is in threaded connection with the corresponding fixed block 12, by screwing the spiral ejector rod 13, the spiral ejector rod 13 can drive the clamping block 11 to move, so as to adjust the distance between the clamping block 11 and the fixed block 12, and because the fixed block 12 is fixed on two sides of the working part 6 in the transverse direction, when the distance between the clamping block 11 and the fixed block 12 is adjusted, the shape correction target forging 10 and the standard forging are loosened, and at this time, the shape correction target forging 10 and the shape correction forging can be removed or installed; when the distance between the clamping block 11 and the fixing block 12 is increased, the clamping block 11 is used for clamping and fixing the shape correction target forging 10 and the standard forging.

It should be emphasized that, in order to more conveniently adjust the clamping degree of the clamping block 11, the wrench 14 is provided at the second end of the screw ejector rod 13 in the present embodiment, and when the distance between the clamping block 11 and the fixing block 12 needs to be adjusted, that is, when the shape-corrected target forging 10 and the standard forging need to be mounted or dismounted, the wrench 14 is only required to be pulled to make the screw ejector rod 13 screwed in or out along the thread inside the fixing block 12, so as to more conveniently adjust the clamping degree of the clamping block 11.

The shape correction target forging 10 of the embodiment comprises a V-shaped opening forging, a U-shaped opening forging and a semi-arc opening forging; the standard forging is a standard forging with a corresponding shape; the second end of the independent hydraulic rod 3 is provided with an independent hydraulic head; an adjustable pressure plate structure 8 is detachably arranged on the lower end face of the independent hydraulic head; the adjustable pressing plate structure 8 comprises a T-shaped pressing plate, the T-shaped pressing plate comprises a transverse part and a longitudinal part, and the transverse part of the T-shaped pressing plate is detachably connected with the independent hydraulic head; and the bottom end of the longitudinal part of the T-shaped pressing plate is provided with an arc structure, and the arc structure is used for contacting and pressing the shape correction target forging 10.

Specifically, as shown in fig. 1 and 3, the shape correction target forging 10 of the present embodiment includes a V-shaped open forging, a U-shaped open forging, and a semi-arc open forging, where the standard forging is a corresponding standard forging; an independent hydraulic head is arranged at the second end of the independent hydraulic rod 3, an adjustable pressure plate structure 8 is arranged on the lower end face (namely the end face close to the shape correction target forging 10 and the standard forging) of the independent hydraulic head, the adjustable pressure plate structure 8 comprises a T-shaped pressure plate, the T-shaped pressure plate comprises a transverse part and a longitudinal part, and the transverse part and the longitudinal part are integrally formed; the transverse part is detachably connected with the lower end face of the independent hydraulic head, the lower end face of the longitudinal part (namely the end face close to the shape correction target forging 10 and the standard forging) is provided with an arc structure, the contact area between the T-shaped pressing plate and the shape correction target forging 10 can be increased by arranging the arc structure, when the shape correction target forging 10 is pressed and corrected by the T-shaped pressing plate, the independent hydraulic rod 3 on the multi-head pressing machine can be controlled by the controller to enable the independent hydraulic rod 3 to move downwards, the independent hydraulic rod 3 on the multi-head pressing machine drives the T-shaped pressing plate to move downwards, and the arc structure on the T-shaped pressing plate presses the shape correction target forging 10.

It is emphasized that the plurality of independent hydraulic levers 3 described above include a first independent hydraulic lever, a second independent hydraulic lever, and a third independent hydraulic lever; a first independent hydraulic head is arranged on the first independent hydraulic rod, and a second independent hydraulic head is arranged on the second independent hydraulic rod; a third independent hydraulic head is arranged on the third independent hydraulic rod; a first T-shaped pressing plate is arranged on the lower end face of the first independent hydraulic head, a second T-shaped pressing plate is arranged on the lower end face of the second independent hydraulic head, a third T-shaped pressing plate is arranged on the lower end face of the third independent hydraulic head, and the transverse parts of the first T-shaped pressing plate, the second T-shaped pressing plate and the third T-shaped pressing plate are identical in structure; the longitudinal parts of the first T-shaped pressing plate and the third T-shaped pressing plate are identical in structure and smaller than the height of the longitudinal part of the second T-shaped pressing plate (namely the first independent hydraulic rod and the third independent hydraulic rod are arranged on two sides of the second independent hydraulic rod). When the shape of the V-shaped open forge piece or the semi-arc open forge piece (the two are the V-shaped standard forge pieces after the shape correction) is corrected, the shape correction target forge piece 10 and the standard forge piece are arranged in the V-shaped groove 7 of the working part 6, the longitudinal part of the first T-shaped press plate and the longitudinal part of the third T-shaped press plate are arranged on two sides of the longitudinal part of the second T-shaped press plate, and the three parts are arranged in parallel.

In order to improve the suitability of school shape frock, make it can be applicable to the V type opening forging and the semicircle arc type opening forging of different transverse dimension, all be equipped with a plurality of grooves that are parallel to each other and the structure is the same on the lower terminal surface of the first independent hydraulic head of this embodiment to the third independent hydraulic head.

Specifically, taking the first independent hydraulic head as an example, the transverse part of the first T-shaped pressing plate can be embedded into different grooves on the lower end surface of the first independent hydraulic head; in a similar way, the transverse part of the second T-shaped pressing plate can be embedded into different grooves on the lower end surface of the second independent hydraulic head; the transverse part of the third T-shaped pressure plate can be embedded into different grooves on the lower end face of the third independent hydraulic head. When the shape correction target forging 10 with a large transverse dimension is aimed at, the embedding positions of the transverse parts on the first T-shaped pressing plate and the third T-shaped pressing plate are adjusted, the distance between the first T-shaped pressing plate and the third T-shaped pressing plate is increased, and therefore the transverse parts are adjusted into different grooves to adapt to the shape correction target forging 10 with a small transverse dimension. Similarly, when the shape correction target forging 10 with a smaller transverse dimension is aimed at, the embedding positions of the transverse parts on the first T-shaped pressing plate and the third T-shaped pressing plate are adjusted, and the distance between the first T-shaped pressing plate and the third T-shaped pressing plate is reduced, so that the transverse parts are adjusted into different grooves to adapt to the shape correction target forging 10 with a smaller transverse dimension.

Example 2

The forging supporting unit and the forging clamping unit adopted in this embodiment are the same as those in embodiment 1, and are not described herein again.

As shown in fig. 6 to 9, the difference between the forging shape correcting tool provided in this embodiment and the forging shape correcting tool provided in embodiment 1 is that: the shape difference of the school shape object that both aimed at and the partial structure of many pressure heads press are different, do not set up independent hydraulic head and T type clamp plate on the many pressure heads hydraulic stem of this embodiment, but utilize horizontal connecting rod 15 to replace independent hydraulic head and T type clamp plate structure.

The embodiment provides a forging shape correction tool, wherein a shape correction target forging 10 comprises a closed arc-shaped cylinder structure forging 16 with two open end faces, and a standard forging is a cylinder structure standard forging 17; the multi-pressure head press also comprises a plurality of transverse connecting rods 15, and the transverse connecting rods 15 penetrate through the shape correction target forge piece 10 and the standard forge piece; two ends of the transverse connecting rod 15 are respectively detachably connected with the second end of the independent hydraulic rod 3; the independent hydraulic rod 3 is vertical to the transverse connecting rod 15; the hydraulic rod drives the transverse connecting rod 15 to press downwards so as to correct the shape of the shape correction target forging 10.

The plurality of independent hydraulic rods 3 of the present embodiment include a first hydraulic rod, a second hydraulic rod, and a third hydraulic rod; the length of first hydraulic stem and third hydraulic stem equals and all is less than the length of second hydraulic stem. The plurality of cross links 15 includes a first cross link, a second cross link, and a third cross link; the first transverse connecting rod, the second transverse connecting rod and the third transverse connecting rod are the same in length; the first transverse connecting rod and the third transverse connecting rod are arranged on two sides of the second transverse connecting rod.

Specifically, as shown in fig. 5 and 6, the multi-ram press further includes a plurality of cross-links; taking a multi-pressure-head press comprising 3 transverse connecting rods as an example, the first transverse connecting rod, the second transverse connecting rod and the third transverse connecting rod are respectively a first transverse connecting rod, a second transverse connecting rod and a third transverse connecting rod, the first transverse connecting rod, the second transverse connecting rod and the third transverse connecting rod all penetrate through a shape correction target forge piece 10 and a standard forge piece, two ends of the first transverse connecting rod to the third transverse connecting rod are detachably connected with independent hydraulic rods 3, the independent hydraulic rods 3 comprise a first hydraulic rod, a second hydraulic rod and a third hydraulic rod, and the lengths of the first hydraulic rod and the third hydraulic rod are the same and are smaller than that of the second hydraulic rod; the number of the first hydraulic rod, the second hydraulic rod and the third hydraulic rod is two; two ends of the first transverse connecting rod are detachably connected with the two first hydraulic rods, and two ends of the second transverse connecting rod are detachably connected with the two second hydraulic rods; the both ends of third transverse connecting rod and two third hydraulic stems can be dismantled and be connected. In addition, it should be noted that each of the cross links is disposed perpendicular to the corresponding independent hydraulic rod 3. When the closed arc-shaped cylinder structure forging 16 with the two end faces in the opening state is subjected to shape correction, the closed arc-shaped cylinder structure is placed in the V-shaped groove 7 of the working part 6, the first transverse connecting rod, the second transverse connecting rod and the third transverse connecting rod penetrate through the closed arc-shaped cylinder structure, then all the transverse connecting rods are connected with the corresponding independent hydraulic rods 3, the controller controls the multi-pressure head press machine to enable the independent hydraulic rods 3 to move downwards, the pressure on the independent hydraulic rods 3 is transmitted to the corresponding transverse connecting rods, and then the transverse connecting rods are used for applying pressure to the closed arc-shaped cylinder structure and correcting the shape of the closed arc-shaped cylinder structure.

In the prior art, a special die is mostly adopted when the barrel forging is corrected, once the special correction die is machined and formed, the structure is difficult to adjust, a fixed structure is formed, the reverse deformation amount is difficult to optimize, and the correction process is difficult to optimize. In addition, the manufacturing of the special sizing die brings high cost and increases the placing space of the die.

Compared with the prior art, the shape correction tool provided by the embodiment is simple in structure and strong in universality, can be suitable for the shape correction of the closed arc-shaped cylinder structure forge piece 16 with openings at two ends and different inner diameter sizes, does not need to manufacture a special shape correction die for each product, and greatly saves the cost. In addition, in the embodiment, the standard forging and the shape correction target forging 10 are both arranged in the V-shaped groove 7 of the working part 6 (the opening size of the V-shaped groove 7 can be designed according to the opening size of the corresponding standard forging), and during shape correction, the maximum deviation between the shape correction target forging 10 and the standard forging after the shape correction is approximately the same as the shape of the standard forging can be ensured within 2mm by the independent stroke control program arranged on the independent hydraulic rod 3, so that the shape correction accuracy is ensured.

In order to ensure the accuracy of the shape correction of the closed arc-shaped cylinder structure forging 16, corresponding marks 20 are respectively arranged on the adjacent end faces of the shape correction target forging 10 and the standard forging in the embodiment; the markings 20 are used to ensure that the sizing target forging 10 maintains the same angle of placement as a standard forging.

Specifically, as shown in fig. 6, in this embodiment, corresponding marks 20 are provided on end faces of the shape correction target forging 10 adjacent to the standard forging, and are used to ensure that the shape correction target forging 10 and the shape correction standard forging keep the same placement angle and placement position, and when the mark 20 is made, a circle of mark 20 may be made, and also may be used to mark a key shape correction part.

Compared with the prior art, the corresponding marks 20 are arranged on the cylinder end faces of the shape correction target forging 10 and the standard forging adjacent to each other, so that the same placing angles of the two can be ensured, and the accuracy of shape correction of the closed arc-shaped cylinder structure forging 16 is further ensured.

Because the closed arc-shaped cylinder forging needs to be corrected for one circle, in the process of correction, after one cylinder part is corrected, the correction target forging 10 and the standard forging need to be simultaneously rotated to correct the next cylinder part (because the cylinder needs to be corrected for one circle, the radians of the cylinders rotating each time are the same, and the cylinders sequentially rotate towards the same direction continuously), so the correction device of the embodiment further comprises a first roller structure 22 and a second roller structure 23; when the closed arc-shaped cylinder structure forging 16 needs to be rotated, the second hydraulic rod is utilized to lift the shape correction target forging 10 and the standard forging by a certain height, and the first roller structure 22 and the second roller structure 23 are respectively placed on the working part 6 and are positioned right below the standard forging and the shape correction target forging 10; the first and

second roller structures

22 and 23 are used to rotate the sizing target forging 10 and the standard forging by a certain angle.

Specifically, as shown in fig. 6 and 7, the first roller structure 22 and the second roller structure 23 of the present embodiment are the same, taking the first roller structure 22 as an example, the first roller structure 22 includes a rectangular parallelepiped base 21, and three pairs of bosses are provided on an upper end surface of the rectangular parallelepiped base 21, the bosses being oppositely disposed: the first boss and the fourth boss are arranged oppositely, the second boss and the fifth boss are arranged oppositely, and the third boss and the sixth boss are arranged oppositely; the opposite surfaces of the first boss and the fourth boss, the second boss and the fifth boss and the third boss and the sixth boss are arc surfaces; a first roller 18 is arranged between the first boss and the second boss, a second roller 19 is arranged between the second boss and the third boss, a third roller is arranged between the fourth boss and the fifth boss, and a fourth roller is arranged between the fifth boss and the sixth boss; the first boss is fixedly connected with the third boss through a first connecting pin, and similarly, the fourth boss is fixedly connected with the sixth boss through a second connecting pin; the first roller 18 and the second roller 19 are both disposed on the first connecting pin and are in rolling connection with the first connecting pin through a bearing, and similarly, the third roller and the fourth roller are both disposed on the second connecting pin and are in rolling connection with the second connecting pin through a bearing. That is to say, taking the first roller structure 22 as an example, the first roller structure 22 includes a

rectangular parallelepiped base

21, 6 protrusions distributed in a 2 × 3 array are disposed on the upper end face of the rectangular parallelepiped base 21, and a roller is disposed between adjacent bosses in the same row.

When the closed arc-shaped cylinder structure forge piece 16 is corrected, the closed cylinder structure forge piece needs to be corrected for one circle, firstly, the shape correction is carried out on a certain deformation part (the specific shape correction process is referred to as the shape correction method below), after the shape correction is finished, the shape correction cylinder structure forge piece and the standard forge piece are lifted by a certain height by using a second transverse connecting rod, then, the first roller structure 22 and the second roller structure 23 are both lapped on the V-shaped groove 7 of the working part 6, the first roller structure 22 is positioned under the shape correction target forge piece 10, the second roller structure 23 is positioned under the standard forge piece, then, the shape correction cylinder structure forge piece and the standard forge piece are respectively placed on corresponding pulleys of the first pulley structure and the second pulley structure by using the second transverse connecting rod, the closed arc-shaped cylinder structure forge piece 16 and the standard forge piece are rotated by referring to the marks 20 on the adjacent end faces of the shape correction target forge piece 10 and the standard forge piece, and the shape correction target forge piece 10 and the standard forge piece are manually rolled to the same angle, and the shape correction is restarted.

Example 3

The embodiment provides a method for correcting a forging piece, which adopts the tool for correcting the forging piece provided by the embodiment 1, and comprises the following steps:

step 1, placing a standard forging in a V-shaped groove 7 of a working part 6, and clamping the standard forging by using a clamping block 11 and a fixing block 12;

step 2, controlling the stroke of an independent hydraulic rod 3 on the multi-ram press through a controller, and recording the position of a stroke switch to a standard forging;

step 3, placing the shape correction target forging 10 and the standard forging in parallel in a V-shaped groove 7 of the working part 6, and clamping the shape correction target forging 10 and the standard forging by using a clamping block 11 and a fixing block 12; the travel switch is adjusted back to the position corresponding to the standard forging, and the arc structure of the adjustable pressure plate on the independent hydraulic rod 3 is utilized to re-calibrate the shape calibration target forging 10 for multiple times;

step 4, removing the standard forging, increasing the stroke distance of the shape correction target forging 10 by 1-10mm, and then re-pressing the shape correction target forging 10 by utilizing the arc structure of the adjustable pressing plate on the independent hydraulic head to realize over-deformation;

in the step 4, when the stroke distance of the correction target forging 10 is increased by 1-10mm, only the strokes of the first independent hydraulic rod 3 and the third independent hydraulic rod 3 on the two sides are increased by 1-10mm, and the stroke of the second independent hydraulic rod 3 in the middle is not required to be increased.

Step 5, the standard part is placed in the V-shaped groove 7 again, the travel switch is adjusted back to the position corresponding to the standard forging part, and pressure is applied again until the shape correction target forging part 10 is the same as the standard forging part in shape;

and 6, after the shape correction is finished, removing the clamping block 11 and the fixing block 12 to obtain the corrected V-shaped forge piece.

It should be noted that, in this embodiment, the shape correction process performed on a V-shaped open forged piece, a U-shaped open forged piece, or a semi-arc open forged piece is performed, and before the shape correction, the shape correction target forged piece 10 is divided into two cases: the opening angles of the V-shaped opening forged piece, the U-shaped opening forged piece and the semi-arc opening forged piece are larger than those of the standard forged piece; or the opening angles of the V-shaped opening forged piece, the U-shaped opening forged piece and the semi-arc opening forged piece are smaller than those of the standard forged piece, and the shape correcting process is the same for two different situations.

Compared with the prior art, the limit switch travel scale independently installed on the multi-ram press can be used for overcoming the over-deformation measure of shape correction rebound, applying 1-10mm of over-deformation to rebound areas on two sides of the shape correction target forging 10, achieving accurate shape correction through several comparisons, accumulating over-deformation data of specific products, and facilitating subsequent use. In addition, the shape correction method provided by the embodiment can ensure that the maximum deviation between the shape correction target forging 10 (the shape correction product) and the standard forging is within the range of 2 mm; it should be noted that the precision of the shape correction is related to the roughness of the shape correction product and the optimization times of the reverse deformation.

Example 4

The embodiment provides a method for correcting a forging piece, which adopts the tool for correcting the forging piece provided by the embodiment 2, and comprises the following steps:

step 3, placing the shape correction target forging 10 and the standard forging in parallel in a V-shaped groove 7 of the working part 6, and clamping the shape correction target forging 10 and the standard forging by using a clamping block 11 and a fixing block 12; the travel switch is adjusted back to the position corresponding to the standard forge piece, and the transverse connecting rod on the independent hydraulic rod 3 is utilized to re-calibrate the shape-calibrated target forge piece 10 (for example, the forge piece 16 with the closed arc-shaped cylinder structure in the opening state) for multiple times of shape calibration;

step 4, removing the standard forging, increasing the stroke distance of the standard forging by 1-10mm, and then re-pressing the shape-correcting target forging 10 by using the transverse connecting rod on the independent hydraulic rod 3 to realize over-deformation;

and 6, lifting the shape correction cylinder forging and the standard forging to a certain height by using a second transverse connecting rod, then putting a first roller structure 22 and a second roller structure 23 above the V-shaped groove 7 of the working part 6, respectively putting the shape correction cylinder forging and the standard forging on corresponding pulleys of the first pulley structure and the second pulley structure, respectively, positioning the second roller structure 23 under the standard forging, respectively putting the shape correction cylinder forging and the standard forging on the corresponding pulleys of the first pulley structure and the second pulley structure by using the second transverse connecting rod, rotating the closed arc cylinder forging 16 and the standard forging according to the marks 20 on the adjacent end surfaces of the shape correction cylinder forging 10 and the standard forging, and manually rolling the shape correction cylinder forging 10 and the standard forging to the same angle to restart shape correction.

It should be noted that when the closed arc-shaped cylinder structure forging 16 is corrected, the closed cylinder structure forging needs to be corrected for one circle, when the closed arc-shaped cylinder structure forging 16 and the standard forging need to be rotated, the closed cylinder structure forging and the standard forging are rotated for a certain radian in the same direction each time, and then the correction is continued until the closed arc-shaped cylinder structure forging 16 is corrected for one circle; after the shape correction is finished, the clamping block 11 and the fixing block 12 are removed, and a closed arc-shaped cylindrical structure forging 16 with two open end faces is obtained after the shape correction.

Compared with the prior art, the shape correcting method provided by the embodiment can ensure that the maximum deviation of the shape correcting target forging 10 (the shape correcting product) and the standard forging is within the range of 2 mm; it should be noted that the precision of the shape correction is related to the roughness of the shape correction product and the optimization times of the reverse deformation.

While the invention has been described with reference to specific preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims

1. A forging piece shape correcting method is characterized by comprising the following steps:

step 3, placing the shape correction target forging and the standard forging in parallel in a V-shaped groove of the working part, and fixing the shape correction target forging and the standard forging by using a clamping block and a fixing block; adjusting the travel switch back to the position corresponding to the standard forging, and simultaneously re-calibrating the shape-calibrated target forging by using the arc structures of the adjustable pressure plate structures on the independent hydraulic rods to perform multiple shape calibrations;

step 4, removing the standard forging, increasing the stroke distance of the shape correction target forging by 1-10mm, and then simultaneously applying pressure to the shape correction target forging again by utilizing the circular arc structures of the adjustable pressure plates on the independent hydraulic heads to realize over-deformation;

step 5, putting the standard forging into the V-shaped groove again, returning the travel switch to the position corresponding to the standard forging, and applying pressure again until the shape correction target forging is the same as the standard forging in shape;

step 6, after the shape correction is finished, removing the clamping block and the fixing block to obtain an open forging structure with the same shape as the standard forging;

the forging shape correcting method adopts a forging shape correcting tool to correct the shape, and the forging shape correcting tool comprises a forging pressing unit, a forging supporting unit and a forging fixing unit;

the shape correction target forging and the standard forging are placed on the forging supporting unit in parallel, and the forging supporting unit is used for supporting the shape correction target forging and the standard forging;

the forging piece pressing unit is used for applying pressure to the shape correction target forging piece to enable the shape of the shape correction target forging piece to be the same as that of the standard forging piece after being corrected;

the forging piece pressing unit comprises a multi-press-head press;

the forging supporting unit is arranged on a working table of the press, the shape correction target forging and the standard forging are arranged on the forging supporting unit and are positioned below the independent hydraulic rods, and the independent hydraulic rods can independently or simultaneously apply pressure to the shape correction target forging to correct the shape;

the forge piece fixing unit comprises a transverse clamping structure, and the transverse clamping structure comprises a clamping block, a fixing block and a spiral ejector rod; the number of the clamping blocks, the number of the fixing blocks and the number of the spiral ejector rods are equal and are all multiple;

a wrench is arranged at the second end of the spiral ejector rod, and the distance between the fixing block and the clamping block can be adjusted through the wrench and the spiral ejector rod;

the shape correction target forge piece is an opening forge piece and comprises a V-shaped opening forge piece, a U-shaped opening forge piece and a semi-arc opening forge piece; the standard forging is a corresponding standard forging;

and the bottom end of the longitudinal part of the T-shaped pressing plate is provided with an arc structure, and the arc structure is used for contacting and pressing the shape correction target forging.

2. The method for correcting the shape of the forged piece according to claim 1, wherein the forged piece supporting unit comprises a cuboid-shaped working part, and a V-shaped groove is formed in the middle of the top of the working part;

the shape correcting target forging and the standard forging are arranged in the V-shaped groove in parallel.

3. The method for sizing forgings according to claim 2, wherein a controller is connected to the press body;

4. The method for correcting the shape of the forged piece according to claim 3, wherein a plurality of grooves which are parallel to each other and have the same structure are arranged on the lower end surface of the independent hydraulic head;

the transverse part of the T-shaped pressing plate can be embedded into different grooves.

5. The method for correcting the shape of the forging is characterized by comprising the following steps of:

step 3, placing the shape correction target forging and the standard forging in parallel in a V-shaped groove of the working part, and fixing the shape correction target forging and the standard forging by using a clamping block and a fixing block; adjusting the travel switch back to the position corresponding to the standard forging, and simultaneously re-calibrating the shape-calibrated target forging by utilizing the transverse connecting rods on each independent hydraulic rod to perform multiple shape calibrations;

step 4, removing the standard forging, increasing the stroke distance of the shape correction target forging by 1-10mm, and then simultaneously applying pressure to the shape correction target forging again by utilizing the transverse connecting rods on the independent hydraulic rods to realize over-deformation;

step 5, the standard forging piece is placed in the V-shaped groove again, the travel switch is adjusted back to the position corresponding to the standard forging piece, and pressure is applied again until the shape correction target forging piece is the same as the shape of the standard forging piece;

step 6, after the shape correction is finished, removing the clamping block and the fixing block to obtain a closed arc-shaped cylinder structure forging with two end faces in an open state after the shape correction;

the shape correcting target forging and the standard forging are placed on the forging supporting unit in parallel, and the forging supporting unit is used for supporting the shape correcting target forging and the standard forging;

the forging piece pressing unit comprises a multi-press-head press;

the forging piece supporting unit is arranged on a press workbench, the shape correction target forging piece and the standard forging piece are arranged on the forging piece supporting unit and are positioned below the independent hydraulic rods, and the independent hydraulic rods can independently or simultaneously apply pressure to the shape correction target forging piece for shape correction;

the shape correction target forge piece comprises a closed arc-shaped cylinder structure forge piece with two open end faces, and the standard forge piece is a cylinder structure standard forge piece;

the multi-pressure-head press also comprises a plurality of transverse connecting rods, and the transverse connecting rods penetrate through the shape correction target forge piece and the standard forge piece; two ends of the transverse connecting rod are respectively detachably connected with the second end of the independent hydraulic rod; the independent hydraulic rod is perpendicular to the transverse connecting rod;

and driving the transverse connecting rod to press downwards through the hydraulic rod so as to correct the shape of the shape correction target forging.

6. The method for correcting the shape of the forged piece according to claim 5, wherein the forged piece supporting unit comprises a cuboid-shaped working part, and a V-shaped groove is formed in the middle of the top of the working part;

and the shape correction target forging and the standard forging are arranged in the V-shaped groove in parallel.

7. The method for sizing forgings according to claim 6, wherein a controller is connected to the press body;

a plurality of independent stroke control programs are embedded in the controller; the independent stroke control programs and the independent hydraulic rods are the same in number and are controlled in a one-to-one correspondence manner;