CN104338798A - Precision hot correction method for forging scraper casting die - Google Patents
Precision hot correction method for forging scraper casting die Download PDFInfo
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- CN104338798A CN104338798A CN201410665184.3A CN201410665184A CN104338798A CN 104338798 A CN104338798 A CN 104338798A CN 201410665184 A CN201410665184 A CN 201410665184A CN 104338798 A CN104338798 A CN 104338798A
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- 238000005242 forging Methods 0.000 title claims abstract description 145
- 238000000034 method Methods 0.000 title abstract description 9
- 238000005266 casting Methods 0.000 title abstract description 6
- 238000003825 pressing Methods 0.000 claims abstract description 46
- 238000001816 cooling Methods 0.000 claims description 14
- 238000009434 installation Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 description 13
- 238000010791 quenching Methods 0.000 description 13
- 230000000171 quenching effect Effects 0.000 description 13
- 238000005496 tempering Methods 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
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Abstract
The invention belongs to the technical field of forging and discloses a precision hot correction method for forging a scraper casting die. A precision hot correction mechanism is adopted and comprises a left pressing block, an upper die convex platform, a middle pressing block, a right pressing block and a lower die concave platform, wherein a to-be-corrected hot forging casting, the left pressing block, the middle pressing block and the right pressing block are positioned between the upper die convex platform and the lower die concave platform, the left pressing block is positioned on the upper part of the left end of a hot-cast forging, the upper die convex platform is positioned on the plane of an upper main body of the hot-cast forging, the middle pressing block is positioned on the middle upper part of the hot-cast forging, the left pressing block is positioned on the upper part of the right end of the hot-cast forging, and the upper plane of the lower die concave platform is positioned on the plane of a lower main body of the hot-cast forging. The precision hot correction method has the advantages of simplicity and reliability in hot correction, high efficiency and low cost, the consistency of final room-temperature straightness precision level tolerance and height dimensions and tolerance of the casting and the forging is good, and the hot correction qualified rate reaches up to 100%.
Description
Technical field
The invention belongs to technical field of forging, be specifically related to a kind of accurate thermal correction measure of scraper plate cast blank die forging.
Background technology
It is casting processing and forging processing are combined to be shaped with a kind of process obtaining required form, size and performance part that cast blank die forging is shaped, and the part obtained is called forge piece.A kind of main processes of especially big II type scraper plate cast blank die forging is: strand casting → cast blank die forging (comprising strand heating, finish-forging and thermal recalibration) → forge piece Tempering and Quenching.The main problem affecting especially big II type scraper plate cast blank die forging quality is the final room temperature linearity tolerance of forge piece is 2.5mm ~ 4.0mm, is difficult to the requirement reaching the final room temperature linearity tolerance≤2.0mm of forge piece.
Especially big II type scraper plate forge piece produces bending process and is divided into two stages: the first stage, the bending produced after cast blank die forging to cooling, because of the longitudinal two end portions of especially big II type scraper plate forge piece, the shape in mid portion and two end portions and three different intervals of the transition portion of mid portion and size, final forging temperature, deformation extent, many unfavorable factors that degree and the residual stress etc. of expanding with heat and contract with cold difference is large, bending amount after cast blank die forging is large, bending rebound quantity is large, when not carrying out thermal recalibration, high temperature linearity tolerance after die forging before cooling is 3.0mm ~ 7.0mm, room temperature linearity tolerance is after cooling 5.0mm ~ 9.0mm, second stage, the bending that forge piece Tempering and Quenching produces later, the bending amount of especially big II type scraper plate forge piece Tempering and Quenching is less, room temperature linearity tolerance≤1.0mm, does not need to carry out follow-up correction and can meet room temperature linearity tolerance≤1.0mm requirement after Tempering and Quenching.The final room temperature linearity tolerance≤2.0mm of especially big II type scraper plate forge piece, therefore, the room temperature linearity tolerance of carrying out thermal recalibration after only having cast blank die forging again reaches≤1.0mm and Tempering and Quenching after room temperature linearity tolerance also reach≤1.0mm time, just can reach the final room temperature linearity tolerance≤2.0mm requirement of forge piece.
From GB/T12362 " steel forging part tolerance and machine-finish allowance " national standard: the room temperature linearity tolerance after forging Tempering and Quenching is divided into regular grade and micron order 2 ranks, especially big II type scraper plate forge piece total length is 1370mm, its regular grade tolerance should be 3.2mm, micron order tolerance should be 2.0mm, therefore, the final room temperature linearity tolerance≤2.0mm of especially big II type scraper plate forge piece is micron order.
Because especially big II type scraper plate has the particularity that amount of bow is large and bending rebound quantity is also large after cast blank die forging, holotype thermal recalibration is carried out in the finish impression of existing forging die, or holotype thermal recalibration is carried out in existing independently straightening die, or drop height type snap close die joint upper mounting plate outside existing forging die finish impression and lower platform structure directly carry out non-holotype thermal recalibration, the room temperature linearity tolerance of forge piece after die forging and before Tempering and Quenching is all 1.5mm ~ 3.0mm (the final room temperature linearity after Tempering and Quenching is all 2.5mm ~ 4.0mm), the requirement of the room temperature linearity micron order tolerance≤1.0mm of forge piece after die forging and before Tempering and Quenching or the final room temperature linearity micron order tolerance≤2.0mm after Tempering and Quenching can not be reached.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is: the accurate thermal correction measure providing a kind of scraper plate cast blank die forging, effectively to overcome the shortcoming of above existing thermal correction measure, solve especially big II type scraper plate forge piece and after die forging and before Tempering and Quenching, carry out thermal recalibration be difficult to reach the difficult problem that room temperature linearity micron order tolerance≤1.0mm or forge piece final room temperature linearity micron order tolerance≤2.0mm requires.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of accurate thermal recalibration structure, it comprises: left briquetting 1, patrix convex flat platform 2, intermediate pressing block 3, right briquetting 4 and the recessed platform 5 of counterdie; Forge hot foundry goods 6 to be corrected, left briquetting 1, intermediate pressing block 3 and right briquetting 4 are all between patrix convex flat platform 2 and the recessed platform 5 of counterdie, left briquetting 1 is positioned at the top of hot-cast forging 6 left end, patrix convex flat platform 2 is positioned on the upper subject plane of hot-cast forging 6, intermediate pressing block 3 is positioned at the top in the middle part of hot-cast forging 6, left briquetting 4 is positioned at the top of hot-cast forging 6 right-hand member, and the upper plane of the recessed platform of counterdie 5 is positioned on the lower subject plane of hot-cast forging 6.
Preferably, the structure of described left briquetting 1 and right briquetting 4 and measure-alike and be arranged symmetrically between forge hot foundry goods 6 and patrix convex flat platform 2; The height that described left briquetting 1 and right briquetting 4 have after hot-cast forging 6 two ends upper contact is installed and patrix convex flat platform 2 are identical with the drop height of the drop height type snap close after counterdie recessed platform 5 matched moulds; Described left briquetting 1 and right briquetting 4 are wedge, and its wedge shape gradient is identical with the drop gradient of patrix convex flat platform 2, and wedge length is consistent with the drop length of patrix convex flat platform 2.
Preferably, described intermediate pressing block 3 is T-shaped block, its contact with hot-cast forging 6 middle upper portion install after the body height top of specific heat forge piece 6 exceed 2.5mm.
Preferably, after thermal recalibration, the upper subject plane of the lower concave plane of left briquetting 1, the lower plane of patrix convex flat platform 2, the upper plane of intermediate pressing block 3, the lower concave plane of right briquetting 4 and hot-cast forging 6 coexists at grade, and the upper plane of the recessed platform of counterdie 5 and the lower subject plane of hot-cast forging 6 also coexist at grade.
Present invention also offers a kind of accurate thermal correction measure of scraper plate cast blank die forging, it comprises the following steps:
S1: installation steps: hot-cast forging 6 later for die forging is taken out from forging die finish impression, then the lower subject plane of hot-cast forging 6 is kept flat on the recessed platform 5 of counterdie down, more left briquetting 1, intermediate pressing block 3, right briquetting 4 are placed on respectively the left upper part of hot-cast forging 6, top, middle part and right-hand member top;
S2: aligning step: hit 2 hammer/parts on patrix convex flat platform 2, transmits hitting power by left briquetting 1, patrix convex flat platform 2, intermediate pressing block 3, right briquetting 4 and acts directly on the upper subject plane of hot-cast forging 6 and lower subject plane and carry out thermal recalibration;
S3: cooling step: the left briquetting 1 after thermal recalibration, intermediate pressing block 3 and right briquetting 4 are taken off from hot-cast forging 6, then takes off hot-cast forging 6 from the recessed platform 5 of counterdie, then is kept flat down by the main body lower plane of hot-cast forging 6 and carry out nature cooling.
Preferably, the thermal recalibration temperature of described hot-cast blank 6 is 850 DEG C ~ 950 DEG C, and also after instant heating strand part 6 die forging, final forging temperature is 850 DEG C ~ 950 DEG C.
Preferably, in described step S2, hitting power size with make the lower concave plane of left briquetting 1, the lower plane of patrix convex flat platform 2, the upper plane of intermediate pressing block 3, the lower concave plane of right briquetting 4 and hot-cast forging 6 upper subject plane coexist at grade for benchmark.
Preferably, in described step S3, the main body lower plane of the hot-cast forging 6 after thermal recalibration is kept flat down and carries out nature cooling.
(3) beneficial effect
The accurate thermal recalibration structure that technique scheme provides and the accurate thermal correction measure of scraper plate cast blank die forging, operation is simple and reliable for thermal recalibration, and efficiency is high, and cost is low, forge piece final room temperature linearity micron order tolerance and height dimension and tolerance uniformity good, thermal recalibration accepted product percentage is up to 100%.
Accompanying drawing explanation
Fig. 1 a is the front view of the especially big II type scraper plate forge piece blank drawing related in the present invention;
Fig. 1 b is the left view of Fig. 1 a;
Fig. 2 a is the schematic diagram (containing the partial structurtes of upper die and lower die in die joint position) of the forging die assembling front view of the existing especially big II type scraper plate cast blank die forging related in the present invention;
Fig. 2 b is the top view (without upper die structure, the double dot dash line profile place at the distance forging die inspection benchmark 350mm place, angle outside finish impression is longitudinally thermal recalibration head-down position) of Fig. 2 a;
Fig. 3 is the schematic diagram (containing left briquetting 1, existing forging die patrix drop height type snap close convex flat platform 2, intermediate pressing block 3, right briquetting 4, the recessed platform 5 of existing forging die counterdie drop height type snap close and hot-cast forging 6 totally six parts) of the assembling front view of accurate thermal recalibration structure of the present invention;
Fig. 4 a is the front view of left briquetting 1 of the present invention and right briquetting 4;
Fig. 4 b is the top view of Fig. 4 a;
Fig. 5 a is the front view of intermediate pressing block 3 of the present invention;
Fig. 5 b is the left view of Fig. 5 a.
In figure, the left briquetting of 1-, 2-patrix convex flat platform, 3-intermediate pressing block, the right briquetting of 4-, the recessed platform of 5-counterdie, 6-hot-cast forging.
Detailed description of the invention
For making object of the present invention, content and advantage clearly, below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.
In describing the invention, it should be noted that, term " on ", D score, "left", "right", " top ", " end ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.In addition, term " first ", " second ", " the 3rd " only for describing object, and can not be interpreted as instruction or hint relative importance.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be direct connection, also can be indirectly connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood depending on concrete condition.
In addition, in describing the invention, except as otherwise noted, the implication of " multiple " is two or more.
A kind of accurate thermal correction measure that the present embodiment proposes for II type scraper plate cast blank die forging especially big in prior art relies on accurate thermal recalibration structure as shown in Figure 3 to realize, the fabricated structure that this accurate thermal recalibration structure is made up of the patrix convex flat platform 2 on the drop height type snap close die joint in the longitudinal outside of existing forging die and counterdie recessed platform 5 structure and 3 kinds of additional structures increasing left briquetting 1, intermediate pressing block 3 and right briquetting 4 between 3 sections of partial zones.
The accurate thermal recalibration structure of the present embodiment specifically comprises left briquetting 1, patrix convex flat platform 2, intermediate pressing block 3, right briquetting 4 and the recessed platform of counterdie 5 five major parts; Left briquetting 1 is positioned at the top of hot-cast forging 6 left end, patrix convex flat platform 2 is positioned on the upper subject plane of hot-cast forging 6, intermediate pressing block 3 is positioned at the top in the middle part of hot-cast forging 6, left briquetting 4 is positioned at the top of hot-cast forging 6 right-hand member, and the upper plane of the recessed platform of counterdie 5 is positioned on the lower subject plane of hot-cast forging 6.
Described accurate thermal recalibration structure checks the effective length at benchmark 350mm place, angle to be the composite structure that patrix convex flat platform 2 on the drop height type snap close die joint of 1060mm and counterdie recessed platform 5 structure and 3 kinds of additional structures increasing left briquetting 1, intermediate pressing block 3 and right briquetting 4 between 3 sections of partial zones form by the distance forging die in the longitudinal outside of the existing forging die finish impression such as shown in Fig. 2 a, Fig. 2 b or Fig. 3; After thermal recalibration, the upper subject plane of the lower concave plane of left briquetting 1, the lower plane of patrix convex flat platform 2, the upper plane of intermediate pressing block 3, the lower concave plane of right briquetting 4 and hot-cast forging 6 coexists at grade, and the upper plane of the recessed platform of counterdie 5 and the lower subject plane of hot-cast forging 6 also coexist at grade.
With reference to shown in Fig. 4 a and Fig. 4 b, the structure of left briquetting 1 and right briquetting 4 and measure-alike and be symmetrical wedge structure, its height dimension had after hot-cast forging 6 left end and right-hand member upper contact are installed is 30mm, identical with the drop height 30mm of the drop height type snap close after existing forging die matched moulds, wedge shape gradient is identical with the drop gradient of patrix convex flat platform 2, the drop similar length of wedge length and patrix convex flat platform 2, to ensure that left briquetting 1 coexists at grade with the upper plane of hot-cast forging 6 left end contacted and right-hand member respectively just with the lower concave plane of right briquetting 4 after installing correction, bending rebound quantity after hot-cast forging 6 thermal recalibration is little, also hypercorrect phenomenon can not be produced.
With reference to shown in Fig. 5 a and Fig. 5 b, the overall shape of intermediate pressing block 3 is T-shaped block structure, and overall height dimension is 66.5mm, exceeds 2.5mm contact the body height top of installing specific heat forge piece 6 afterwards with hot-cast forging 6 middle upper portion.The principal element affecting intermediate pressing block 3 height dimension has 3 aspects: this height dimension that the bottom contacting the intermediate pressing block 3 of installation place with hot-cast forging 6 middle upper portion is 125-61mm=64mm chill casting forging to the difference in height of upper surface, hot-cast forging 6 two ends is 123-62mm=61mm, hot-cast forging 6 mid portion final forging temperature within longitudinal 715mm as shown in Figure 1a before thermal recalibration is 850 DEG C ~ 950 DEG C, the final forging temperature at hot-cast forging 6 two ends is 1000 DEG C ~ 1150 DEG C, hot-cast forging 6 two end portions that reason causes because expanding with heat and contract with cold is than mid portion 64mm height 1.0mm, simultaneously, hot-cast forging 6 mid portion can produce the distortion reducing amount that 1.0mm ~ 2.0mm mean value is 1.5mm after correction is stressed, namely the effective depth of intermediate pressing block 3 should be 64+1.0+1.5mm=66.5mm, therefore, only have and intermediate pressing block 3 height dimension is chosen for 66.5mm, the upper plane of the intermediate pressing block 3 after just making installation thermal recalibration and the upper subject plane of hot-cast forging 6 coexist at grade just, simultaneously, bending rebound quantity after hot-cast forging 6 thermal recalibration is minimum, also hypercorrect phenomenon can not be produced, this conforms to completely with the actual result of thermal recalibration.
The hot-cast blank 6 thermal recalibration temperature of accurate thermal correction measure is 850 DEG C ~ 950 DEG C, thermal recalibration temperature with the actual final forging temperature within the longitudinal 715mm of hot-cast forging 6 mid portion as seen in figure la and lb for benchmark.ZG30CrMnSi blank is the maximum stage of degree of expanding with heat and contract with cold and bending in die forging from initial forging temperature 1150 DEG C ~ 1200 DEG C to final forging temperature 850 DEG C ~ 950 DEG C die forging complete stages, but it is less to have enough distortion plasticity and less resistance of deformation and degree of expanding with heat and contract with cold after cooling and bending rebound quantity 850 DEG C ~ 950 DEG C time, therefore, the thermal recalibration 850 DEG C ~ 950 DEG C time is effective; As hot-cast forging 6 temperature < 850 DEG C, the requirement of room temperature linearity tolerance after thermal recalibration, can not be met, but again carry out thermal recalibration after allowing that it is heated to 850 DEG C ~ 950 DEG C again; Left briquetting 1, patrix convex flat platform 2, intermediate pressing block 3, right briquetting 4 and the recessed platform of counterdie 5 five parts all should carry out preheating before thermal recalibration, and preheat temperature is 150 DEG C ~ 350 DEG C, and the bending rebound quantity after hot-cast forging 6 thermal recalibration is less.
In accurate thermal recalibration process, need to hit mold patrix convex flat platform 2, being specially cycle is the 2 hammers/cycle of part under existing forging die patrix effect as shown in Figure 2 a, both thermal recalibration can have been avoided not in place and the phenomenon that amount of bow that is that cause is large, and also can avoid exceeding the proper limits in righting a wrong and the height dimension caused surpasses the phenomenon of the low limit of tolerance; Hitting power size with make the lower concave plane of left briquetting 1, the lower plane of existing forging die patrix drop height type snap close convex flat platform 2, the upper plane of intermediate pressing block 3, the lower concave plane of right briquetting 4 and hot-cast forging 6 upper subject plane coexist at grade for benchmark, the upper subject plane of hot-cast forging 6 can be made to ensure parallel with lower subject plane, the room temperature linearity tolerance after thermal recalibration and the uniformity of height dimension and tolerance good.
Need cooling after correction, can be that the main body lower plane of the hot-cast forging 6 of 850 DEG C ~ 950 DEG C lies in down on the ground grading of non-strong convection wind and free from dampness or floor and carries out nature cooling by temperature after thermal recalibration, cooled bending rebound quantity be minimum.
Therefore, based on above-mentioned accurate thermal recalibration structure and bearing calibration analysis, accurate thermal correction measure of the present invention is divided into following 3 job steps: (1) erection stage, namely the hot-cast forging 6 being first 850 DEG C ~ 950 DEG C by final forging temperature after die forging takes out from existing forging die finish impression as shown in Figure 2 a and 2 b, then the lower subject plane of hot-cast forging 6 is lain in down on the recessed platform 5 of counterdie of double dot dash line place as shown in Fig. 2 b or Fig. 3, again by left briquetting 1, intermediate pressing block 3, right briquetting 4 is placed on the left upper part of hot-cast forging 6 respectively, top, middle part and right-hand member top, (2) calibration phase, namely under the effect of the existing forging die patrix hitting power such as shown in Fig. 2 a or Fig. 3, hit 2 hammer/parts, transmit hitting power by left briquetting 1, patrix convex flat platform 2, intermediate pressing block 3, right briquetting 4 and act directly on the upper subject plane of hot-cast forging 6 and lower subject plane and carry out thermal recalibration, (3) cooling stage, namely first the left briquetting 1 after thermal recalibration, intermediate pressing block 3 and right briquetting 4 are taken off from hot-cast forging 6, then take off hot-cast forging 6 from the recessed platform 5 of existing forging die counterdie drop height type snap close, then the main body lower plane of hot-cast forging 6 is lain in down on the ground grading of non-strong convection wind and free from dampness or floor and carry out nature cooling.
As can be seen from technique scheme, the present invention has following distinguishing feature:
(1) the accurate thermal correction measure of especially big II type scraper plate cast blank die forging of the present invention, solves especially big II type scraper plate forge piece and after die forging and before Tempering and Quenching, carries out thermal recalibration be difficult to reach the difficult problem that room temperature linearity micron order tolerance≤1.0mm or the final room temperature linearity micron order tolerance after Tempering and Quenching≤2.0mm requires.
(2) the accurate thermal correction measure of especially big II type scraper plate cast blank die forging of the present invention, operation is simple and reliable for thermal recalibration, and efficiency is high, and cost is low, forge piece final room temperature linearity tolerance and height dimension and tolerance uniformity good, thermal recalibration accepted product percentage is up to 100%.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.
Claims (8)
1. an accurate thermal recalibration structure, is characterized in that, comprising: left briquetting (1), patrix convex flat platform (2), intermediate pressing block (3), right briquetting (4) and the recessed platform of counterdie (5), forge hot foundry goods (6) to be corrected, left briquetting (1), intermediate pressing block (3) and right briquetting (4) are all positioned between patrix convex flat platform (2) and the recessed platform of counterdie (5), left briquetting (1) is positioned at the top of hot-cast forging (6) left end, patrix convex flat platform (2) is positioned on the upper subject plane of hot-cast forging (6), intermediate pressing block (3) is positioned at the top at hot-cast forging (6) middle part, left briquetting (4) is positioned at the top of hot-cast forging (6) right-hand member, the upper plane of the recessed platform of counterdie (5) is positioned on the lower subject plane of hot-cast forging (6).
2. accurate thermal recalibration structure as claimed in claim 1, it is characterized in that, the structure of described left briquetting (1) and right briquetting (4) and measure-alike and be arranged symmetrically between forge hot foundry goods (6) and patrix convex flat platform (2); The height that described left briquetting (1) and right briquetting (4) have after hot-cast forging (6) two ends upper contact is installed and patrix convex flat platform (2) are identical with the drop height of the drop height type snap close after the recessed platform of counterdie (5) matched moulds; Described left briquetting (1) and right briquetting (4) are wedge, and its wedge shape gradient is identical with the drop gradient of patrix convex flat platform (2), and wedge length is consistent with the drop length of patrix convex flat platform (2).
3. accurate thermal recalibration structure as claimed in claim 1, it is characterized in that, described intermediate pressing block (3) is T-shaped block, its contact with hot-cast forging (6) middle upper portion install after the body height top of specific heat forge piece (6) exceed 2.5mm.
4. accurate thermal recalibration structure as claimed in claim 1, it is characterized in that, after thermal recalibration, the lower concave plane of left briquetting (1), the lower plane of patrix convex flat platform (2), the upper plane of intermediate pressing block (3), the lower concave plane of right briquetting (4) and the upper subject plane of hot-cast forging (6) coexist at grade, and the upper plane of the recessed platform of counterdie (5) and the lower subject plane of hot-cast forging (6) also coexist at grade.
5. an accurate thermal correction measure for scraper plate cast blank die forging, is characterized in that, comprise the following steps:
S1: installation steps: hot-cast forging (6) later for die forging is taken out from forging die finish impression, then the lower subject plane of hot-cast forging (6) is kept flat on the recessed platform of counterdie (5) down, more left briquetting (1), intermediate pressing block (3), right briquetting (4) are placed on respectively the left upper part of hot-cast forging (6), top, middle part and right-hand member top;
S2: aligning step: to hammer time/part into shape in the upper strike 2 of patrix convex flat platform (2), transmits hitting power by left briquetting (1), patrix convex flat platform (2), intermediate pressing block (3), right briquetting (4) and acts directly on the upper subject plane of hot-cast forging (6) and lower subject plane and carry out thermal recalibration;
S3: cooling step: the left briquetting (1) after thermal recalibration, intermediate pressing block (3) and right briquetting (4) are taken off from hot-cast forging (6), then take off hot-cast forging (6) from the recessed platform of counterdie (5), then the main body lower plane of hot-cast forging (6) is kept flat down carry out nature cooling.
6. the accurate thermal correction measure of scraper plate cast blank die forging as claimed in claim 5, it is characterized in that, the thermal recalibration temperature of described hot-cast blank (6) is 850 DEG C ~ 950 DEG C, and also after instant heating strand part (6) die forging, final forging temperature is 850 DEG C ~ 950 DEG C.
7. the accurate thermal correction measure of scraper plate cast blank die forging as claimed in claim 5, it is characterized in that, in described step S2, hitting power size coexists at grade for benchmark to make the lower concave plane of left briquetting (1), the lower plane of patrix convex flat platform (2), the upper plane of intermediate pressing block (3), the lower concave plane of right briquetting (4) and the upper subject plane of hot-cast forging (6).
8. the accurate thermal correction measure of scraper plate cast blank die forging as claimed in claim 5, is characterized in that, in described step S3, kept flat down by the main body lower plane of the hot-cast forging (6) after thermal recalibration and carry out nature cooling.
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| CN104722695A (en) * | 2015-03-31 | 2015-06-24 | 国营第六一六厂 | Forging die for scraper cast blank die forging |
| CN105170852A (en) * | 2015-10-15 | 2015-12-23 | 国营第六一六厂 | Control method for precise dimensional tolerance of scraper casting-forging part |
| CN105598217A (en) * | 2015-12-30 | 2016-05-25 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Constant-temperature and constant-pressure straightening method for warpage of titanium alloy die forging |
| CN108145050A (en) * | 2017-12-05 | 2018-06-12 | 国营第六六厂 | A kind of control method of camshaft hot forging micron order dimensional tolerance |
| CN111590004A (en) * | 2020-05-26 | 2020-08-28 | 江苏龙城精锻有限公司 | Manufacturing integral stainless steel oil rail forging and manufacturing process thereof |
| CN117161142A (en) * | 2023-09-28 | 2023-12-05 | 天津广亨特种装备股份有限公司 | Thermal correction die and method for adjusting sheet |
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| JP2008238198A (en) * | 2007-03-26 | 2008-10-09 | Daido Amistar Co Ltd | Die set and die mounting method thereof |
| JP2010064114A (en) * | 2008-09-11 | 2010-03-25 | Kobe Steel Ltd | Trimming device and trimming method |
| CN201573045U (en) * | 2009-12-04 | 2010-09-08 | 西安航空动力股份有限公司 | Hot correcting combined mould used for blade forging |
| CN201613328U (en) * | 2010-03-19 | 2010-10-27 | 重庆杰信模具有限公司 | Finishing mould for automotive front axle |
| CN102989988A (en) * | 2012-08-17 | 2013-03-27 | 大连大高阀门股份有限公司 | Manufacturing process of turnout base plate of high-speed railway |
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Cited By (9)
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|---|---|---|---|---|
| CN104722695A (en) * | 2015-03-31 | 2015-06-24 | 国营第六一六厂 | Forging die for scraper cast blank die forging |
| CN104722695B (en) * | 2015-03-31 | 2016-09-28 | 国营第六一六厂 | The forging die that a kind of scraper plate cast blank die forging shapes |
| CN105170852A (en) * | 2015-10-15 | 2015-12-23 | 国营第六一六厂 | Control method for precise dimensional tolerance of scraper casting-forging part |
| CN105598217A (en) * | 2015-12-30 | 2016-05-25 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Constant-temperature and constant-pressure straightening method for warpage of titanium alloy die forging |
| CN108145050A (en) * | 2017-12-05 | 2018-06-12 | 国营第六六厂 | A kind of control method of camshaft hot forging micron order dimensional tolerance |
| CN111590004A (en) * | 2020-05-26 | 2020-08-28 | 江苏龙城精锻有限公司 | Manufacturing integral stainless steel oil rail forging and manufacturing process thereof |
| CN111590004B (en) * | 2020-05-26 | 2022-01-11 | 江苏龙城精锻集团有限公司 | Manufacturing process for manufacturing integral stainless steel oil rail forging |
| CN117161142A (en) * | 2023-09-28 | 2023-12-05 | 天津广亨特种装备股份有限公司 | Thermal correction die and method for adjusting sheet |
| CN117161142B (en) * | 2023-09-28 | 2024-04-16 | 天津广亨特种装备股份有限公司 | Thermal correction die and method for adjusting sheet |
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