CN117696804A - A method for manufacturing ultra-wide and ultra-long molded plate forgings - Google Patents

Abstract

The invention relates to the technical field of plate processing, in particular to a manufacturing method of an ultra-wide and ultra-long die pressing plate forging piece. The method comprises the following steps: s1: designing a mould; uniformly dividing the semicircular bulges on the upper surface of the forging into a plurality of pressing areas along the length direction, wherein the number and positions of the semicircular bulges in each pressing area are the same, the width of each pressing area is N times the diameter of each semicircular bulge, and N is more than or equal to 2; the two adjacent pressing areas are provided with overlapping parts with semicircular bulge diameter lengths, and the die is provided with a die groove matched with the pressing areas for use; s2: compression molding a forging; the method adopts a mode of combining free forging and die forging to realize the partition forming of the ultra-wide ultra-long die pressing plate, wherein the width of a pressing area is N times of the diameter of a semicircular bulge, and N is more than or equal to 2; the overlapping parts of the diameter and the length of the semicircular bulges are arranged on the two adjacent pressing areas, and the smooth transition of the two pressing areas is realized by controlling the moving distance of the plate blank to be N-1 times of the diameter of the semicircular bulges, so that the product performance and the service life are ensured.

Description

A method for manufacturing ultra-wide and ultra-long molded plate forgings

Technical field

The invention relates to the technical field of plate processing, and specifically relates to a method for manufacturing ultra-wide and ultra-long molded plate forgings.

Background technique

Figure 1 shows an ultra-wide and ultra-long forging. The length of this forging exceeds 6 meters and the width exceeds 5 meters. The upper surface of the forging is provided with multiple rows of staggered semicircular protrusions. Two adjacent ones in the same row The semicircular protrusions are in contact with each other, that is, the length of the line between the midpoints of the two semicircular protrusions is the diameter of the semicircular protrusions; this kind of forging is generally produced by casting, and there is shrinkage after the casting is completed. Unbalanced, cracking, loose, shrinkage and other serious casting defects, as well as poor mechanical properties, cannot meet the high-strength application environment of the product.

Contents of the invention

The technical problem to be solved by the present invention is to provide a manufacturing method for ultra-wide and ultra-long die plate forgings to improve the forming quality of the forgings.

The technical solution adopted by the present invention to solve the technical problem is a manufacturing method of ultra-wide and ultra-long die plate forgings, which includes the following steps:

S1: Design the mold; divide the semicircular protrusions on the upper surface of the forging into multiple pressing areas evenly along the length direction. The number and position of the semicircular protrusions in each pressing area are the same, and the width of the pressing area is semicircle. N times the diameter of the semicircular protrusion, N ≥ 2; two adjacent pressing zones are provided with overlapping portions of the diameter lengths of the semicircular protrusions, and the mold is provided with a mold groove used in conjunction with the pressing zone;

S2: die-formed forgings;

S21: Preheat the mold, the preheating temperature is 180~220℃;

S22: The slab is heated to the forging section according to the forging process specifications and kept warm; after the insulation is completed, the slab is placed on the flat anvil;

S23: Use the press to apply pressure to the mold to form the first pressing area on the upper surface of the slab. After the molding of the first pressing area is completed, use the forging operator to drive the slab to move along the length of the slab. The moving distance of the slab is N-1 times the diameter of the semicircular protrusion, then mold the second pressing area, and mold in sequence until the end;

S23: Forging is completed after smoothing the warpage and trimming the edges.

Further, before or after step S1, step S3 is also included. In step S3, heating and heat preservation should be carried out according to the forging process before each forging fire, and forging can be performed only after the forging requirements are met;

S3: Slab forming;

S31: The initial blank is forged from the steel ingot. The initial blank includes a clamp handle section and an ingot body section. The clamp handle section and the ingot body section are coaxial; the ingot body section is obtained by cutting off a certain proportion of the nozzle section from the steel ingot body;

S32: Upsetting and lengthening, put the pliers section into the upsetting drain pan, and upset the ingot body section. After upsetting is completed, take the initial blank out of the upsetting drain pan and lengthen the ingot body section;

S33: Cut off the handle section of the initial blank after S32 processing, and then roughen the ingot body section. After the roughening is completed, punch the ingot body section;

S34: Use the horse pole to lengthen the ingot body section so that the length of the ingot body section is equal to the preset width of the slab;

S35: Expand the ingot body section so that the circumference of the ingot body section is equal to 1 or 2 times the preset length of the slab;

S36: Use the cutting tool to cut the ingot body segment into two identical arc segments or one arc segment; and flatten the arc segment to form a slab.

Further, after step S36, all surfaces of the slab are processed according to process requirements so that the slab meets the flaw detection requirements.

Further, the flat anvil includes anvils arranged at intervals along the length direction of the slab, and the upper surface of the anvil is in contact with the lower surface of the slab; the distance between two adjacent anvils is less than half the length of the slab, so The mold is arranged above the anvil in the middle position.

The beneficial effects of the present invention are: this method uses a combination of free forging and die forging to achieve zoned forming of ultra-wide and ultra-long die pressing plates. The width of the pressing zone is N times the diameter of the semicircular protrusion, N≥2; adjacent The two pressing zones are provided with overlapping portions of the diameter length of the semicircular protrusion. By controlling the moving distance of the slab to be N-1 times the diameter of the semicircular protrusion, a smooth transition between the two pressing zones is achieved, making the surface of the slab semicircular. The circular raised streamlines are complete to ensure product performance and longevity.

Description of the drawings

Figure 1 is a schematic structural diagram of the forging of the present invention;

Figure 2 is a schematic diagram of the semicircular protrusions on the surface of the forging divided into pressing areas;

Figure 3 is a front view of the mold;

Figure 4 is a side view of the mold;

Figure 5 is a schematic diagram of the pressing process;

Figure 6 is a schematic diagram of slab forming.

Reference signs: 1-forging; 101-semi-circular protrusion; 102-pressing area; 2-mold; 201-die groove; 3-spindle body section; 4-clamp handle section; 5-arc section; 6-slab. ; 7-Flat anvil; 701-Anvil.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and cannot be understood as limiting the present invention.

As shown in Figures 1 to 5, a method for manufacturing ultra-wide and ultra-long die plate forgings of the present invention includes the following steps:

S1: Design mold 2; refer to Figures 2 to 4, divide the semicircular protrusion 101 on the upper surface of the forging 1 into multiple pressing areas 102 evenly along the length direction, and the semicircular protrusion 101 in each pressing area 102 The number and position are the same, and the width of the pressing area 102 is N times the diameter of the semicircular protrusion 101, N≥2; two adjacent pressing areas 102 are provided with overlapping portions of the diameter length of the semicircular protrusion 101, mold 2 There is a mold groove 201 used in conjunction with the pressing zone 102; wherein, the number and position of the semicircular protrusions 101 in each pressing zone 102 are the same, which allows multiple pressing zones to be formed using the same mold 2 102, the semicircular protrusion 101 on the upper surface of the forging 1 is finally formed; the width of the pressing zone 102 is N times the diameter of the semicircular protrusion 101, that is, each pressing zone 102 has N semicircular protrusions 101, The preferred number of N is 3; in order to make a smooth transition between two adjacent pressing zones 102, the two adjacent pressing zones 102 are provided with an overlapping portion of the diameter length of the semicircular protrusion 101. The shape of the mold groove 201 matches the shape of the pressing area 102, that is, the pressing area 102 is a semicircular protrusion 101, and the mold groove 201 is a semicircular groove.

S2: die forming forging 1;

S21: Preheat mold 2, the preheating temperature is 180~220℃;

S22: The slab 6 is heated to the forging section according to the forging process specifications and kept warm; after the insulation is completed, the slab 6 is placed on the flat anvil 7;

S23: Referring to Figure 5, use a press to apply pressure to the mold 2 to form the first pressing area 102 on the upper surface of the slab 6. After the molding of the first pressing area 102 is completed, use the forging operator to drive the slab 6 along the slab. 6 moves in the length direction, and the moving distance of the slab 6 is N-1 times the diameter of the semicircular protrusion 101, and then the second pressing area 102 is molded, and the molding is completed in sequence. Among them, the moving distance of the slab 6 is N-1 times the diameter of the semicircular protrusion 101, so that there is a difference in the diameter of the semicircular protrusion 101 in the moving distance of the slab 6 relative to the pressing area 102, which makes the second During the second pressing, the edge of the first pressing zone 102 will be pressed, thus ensuring the molding quality of the edge of the first pressing zone 102;

S23: Forging is completed after smoothing the warpage and trimming the edges.

In order to obtain a better slab 6, further, referring to Figure 6, step S3 is also included before or after step S1. In step S3, heating and insulation should be performed according to the forging process before each forging fire to meet the forging requirements. then forging;

S3: Slab 6 is formed;

S31: Initial billet for steel ingot forging. The initial billet includes a clamp handle section 4 and an ingot body section 3. The clamp handle section 4 and the ingot body section 3 are coaxial; the ingot body section 3 is obtained by cutting off a certain proportion of the nozzle section from the steel ingot body. ;

S32: Upsetting and lengthening, put the clamp handle section 4 into the upsetting drain pan, and upset the ingot body section 3. After the upsetting is completed, take out the initial blank from the upsetting drain pan, and lengthen the ingot body section 3. ; Through continuous thickening and elongation of the piers, the grains in the ingot body section 3 are made more uniform, ensuring the quality of the formed forging 1.

S33: Cut off the handle section 4 of the initial blank processed in S32, and then roughen the ingot body section 3. After the roughening is completed, punch the ingot body section 3;

S34: Use a horse bar to lengthen the ingot body section 3 so that the length of the ingot body section 3 is equal to the preset width of the slab 6; here the preset width of the slab 6 should be greater than the width of the forging 1 to facilitate subsequent cutting of the edges.

S35: Expand the ingot body section 3 so that the circumference of the ingot body section 3 is equal to 1 or 2 times the preset length of the slab 6; similarly, the preset length of the slab 6 here should be greater than the length of the forging 1 to facilitate subsequent edge alignment. Make a cut.

S36: Use the cutting tool to cut the ingot body section 3 into two identical arc sections 5 or one arc section 5; and flatten the arc section 5 to form a slab 6; when the circumference of the ingot body section 3 is When the circumference of the ingot body section 3 is twice the preset length of the slab 6, cut the ingot body section 3 along its axis direction to form a slab 6; when the circumference of the ingot body section 3 is twice the preset length of the slab 6, cut two sections The plane formed by the lines coincides with the axis of the ingot body section 3; thus two slabs 6 are formed.

After the slab 6 is forged and formed, defects such as cracks and bites are prone to occur on the surface. Furthermore, after step S36, all surfaces of the slab 6 are processed according to the process requirements so that the slab 6 meets the flaw detection requirements. A milling machine can be used to process the surface of the slab 6 to make the surface of the slab 6 smooth and meet the flaw detection requirements.

The flat anvil 7 can be the same size as the slab 6, but this structure makes the flat anvil 7 too heavy and consumes a lot of material. Further, referring to Figure 5, the flat anvil 7 includes anvils arranged at intervals along the length direction of the slab 6. The upper surface of the anvil 701 is in contact with the lower surface of the slab 6; the distance between two adjacent anvils 701 is less than half the length of the slab 6, and the mold 2 is arranged at the middle position of the anvil 701 above. It is preferred to use three anvils 701 here. The distance between the first anvil 701 and the third anvil 701 is less than the length of the slab 6. The second anvil 701 is located in the middle position. During pressing, the mold 2 Located above the second anvil 701.

The examples of this specific implementation mode are all preferred embodiments of the present invention, and do not limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered by within the protection scope of the present invention.

Claims (4)

1. A method for manufacturing ultra-wide and ultra-long molded plate forgings, which is characterized in that it includes the following steps: S1: Design the mold (2); divide the semicircular protrusion (101) on the upper surface of the forging (1) evenly into multiple pressing areas (102) along the length direction, and the semicircular protrusions in each pressing area (102) The number and position of the protrusions (101) are all the same, and the width of the pressing area (102) is N times the diameter of the semicircular protrusion (101), N≥2; two adjacent pressing areas (102) are provided with semicircular The overlapping portion of the diameter and length of the protrusion (101), the mold (2) is provided with a mold groove (201) used in conjunction with the pressing area (102); S2: die-formed forgings (1); S21: Preheat the mold (2), the preheating temperature is 180~220℃; S22: The slab (6) is heated to the forging range according to the forging process specifications and kept warm; after the insulation is completed, the slab (6) is placed on the flat anvil (7); S23: Use the press to apply pressure to the mold (2) to form the first pressing area (102) on the upper surface of the slab (6). After the molding of the first pressing area (102) is completed, use the forging operator to drive the slab. (6) Move along the length direction of the slab (6). The moving distance of the slab (6) is N-1 times the diameter of the semicircular protrusion (101), and then mold the second pressing area (102), in sequence Molding until finished; S23: Forging is completed after smoothing the warpage and trimming the edges. 2. A method for manufacturing ultra-wide and ultra-long molded plate forgings as claimed in claim 1, characterized in that: before or after step S1, step S3 is also included, and each forging fire in step S3 should be carried out according to The forging process is heated and insulated to meet the forging needs before forging; S3: Slab (6) forming; S31: Steel ingot forging initial blank, the initial blank includes a clamp handle section (4) and an ingot body section (3), the clamp handle section (4) and the ingot body section (3) are coaxial; the ingot body section (3) is composed of The steel ingot body is obtained by cutting off a certain proportion of the nozzle section; S32: Upsetting and lengthening, put the pliers handle section (4) into the upsetting drain pan, and upset the ingot body section (3). After the upsetting is completed, take out the initial blank from the upsetting drain pan, and align the ingot body section. (3) To lengthen; S33: Cut off the handle section (4) of the initial blank after S32 processing, and then roughen the ingot body section (3). After the roughening is completed, punch the ingot body section (3); S34: Use a horse pole to lengthen the ingot body section (3) so that the length of the ingot body section (3) is equal to the preset width of the slab (6); S35: Expand the hole of the ingot body section (3) so that the circumference of the ingot body section (3) is equal to 1 or 2 times the preset length of the slab (6); S36: Use a cutting tool to cut the ingot body section (3) into two identical arc sections (5) or one arc section (5); and flatten the arc section (5) to form a plate Blank (6). 3. The manufacturing method of an ultra-wide and ultra-long die-pressed plate forging according to claim 2, characterized in that: after step S36, all surfaces of the slab (6) are processed according to the process requirements, so that the slab (6) meets Detection requirements. 4. The manufacturing method of ultra-wide and ultra-long molded plate forgings according to claim 1, characterized in that: the flat anvil (7) includes anvils (701) arranged at intervals along the length direction of the slab (6). , the upper surface of the anvil (701) is in contact with the lower surface of the slab (6); the distance between two adjacent anvils (701) is less than half the length of the slab (6), and the mold (2) Set above the anvil (701) at the middle position.