CN104439913A - Forging method for part with great-depth rectangular hole - Google Patents
Forging method for part with great-depth rectangular hole Download PDFInfo
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- CN104439913A CN104439913A CN201410506785.XA CN201410506785A CN104439913A CN 104439913 A CN104439913 A CN 104439913A CN 201410506785 A CN201410506785 A CN 201410506785A CN 104439913 A CN104439913 A CN 104439913A
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- forging
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- temperature
- rectangular opening
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
A forging method for a part with a great-depth rectangular hole includes the steps that (1), a high-quality carbon steel bar is selected and sawn to obtain a sawn workblank; (2), the sawn workblank is heated to 1150 DEG C-1200 DEG C; (3), after heat treatment is carried out, the sawn workblank is forged in the radial direction to obtain a prefabricated forging workblank, and the finish-forging temperature of the step is 1000 DEG C-1100 DEG C; (4), a forging die is preheated, the prefabricated forging workblank obtained in the step (3) is forged to obtain a finish-forging workblank, and the finish-forging temperature of the step is 900 DEG C-950 DEG C; (5), pre-punching and trimming are performed on the finish-forging workblank obtained in the step (4) to obtain a pre-punched workblank, and the finish-forging temperature of the step is 850 DEG C-900 DEG C; (6), the pre-punched workblank obtained in the step (5) is forged to obtain a finish-forging part, and the finish-forging temperature of the step is unlimited. The high-accuracy forged part with the great-depth rectangular hole can be obtained fast, and the comprehensive mechanical performance of the part can be improved substantially.
Description
Technical field
The present invention relates to a kind of forging method, especially relate to a kind of forging method of the part with large degree of depth rectangular opening.
Background technology
To the processing of degree of depth rectangular opening large on part often adopt subdrilling circular hole to carry out again method that roughing and fine finishining obtain square hole in prior art, such Measures compare is consuming time, and cost of manufacture is higher.If can by the method for forging, not only speed be fast, and the mechanical performance of forging also can be greatly improved.But the forging method of square hole usually adopts one-shot forming, this method often can not realize the object of expecting for the square through hole of the large degree of depth (degree of depth is more than 50 millimeters).Because rectangular opening is comparatively dark, directly during forging and stamping rectangular opening, middle clout does not have place to run away to cause clout to be drawn by rectangular opening distortion even drift can be broken, thus can not produce the through hole meeting technical requirement.Even if produced rectangular opening reluctantly, also because precision can not be satisfied the demand and can not use, or need could meet use through complicated further fine finishining.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of forging method of the part with large degree of depth rectangular opening, not only can forge the part with large degree of depth rectangular opening smoothly rapidly, and precision be high, can meet instructions for use.
The present invention in order to solve the problems of the technologies described above adopted technical scheme is: a kind of forging method of the part with large degree of depth rectangular opening, comprises the following steps:
1), according to the target size of part choose the Fine Steel Casting iron bar that the trade mark is 30 or 35, then sawing blank is obtained to bar stock saw cutting;
2), by ready for step 1) sawing blank put in heating furnace and carry out uniform heating treatment, after heating, the temperature of sawing blank is 1150-1200 DEG C;
3), by step 2) heat after the sawing blank that obtains be placed on friction press it be radially swaged into target size, obtain prefabricated rough forging, in this step, final forging temperature is 1000-1100 DEG C;
4), the forging mold of preheating friction press, the prefabricated rough forging then step 3) obtained is put in described forging mold and is carried out forging and obtain finish-forging blank, and in this step, final forging temperature is 900-950 DEG C.
5) the finish-forging blank, by step 4) obtained is put in the shaving die of opening-type single-point forcing press and is carried out pre-punched hole and trimming, obtains pre-punched hole blank, and in this step, final forging temperature is 850-900 DEG C.
6), put into by the pre-punched hole blank obtained in step 5) in the finish-forging punching die of the forcing press lower than step 4) press tonnage used, forging obtains finish-forging part, and in this step, final forging temperature is not for limit.
Preferably, step 2) in, after heating, the temperature of sawing blank is 1175 DEG C.
Preferably, in step 4), the forging mold temperature after the pre-heat treatment is between 250-400 DEG C.
Preferably, in step 4), final forging temperature is 925 DEG C.
Preferably, the final forging temperature in step 5) is 875 DEG C.
Preferably, sawing bar, from heating furnace is come out of the stove, completes to prefabricated rough forging, time≤15 seconds.
Preferably, also have the step of a bead after step 6), this step shot diameter used is 1.0 ~ 1.5 millimeters, and the time of shot-peening is 8 minutes ~ 12 minutes.
Preferably, in described bead blasting step, the time of shot-peening is 10 minutes.
Beneficial effect:
Use the present invention not only can obtain the forging parts with large degree of depth rectangular opening with degree of precision fast, and significantly can improve the comprehensive mechanical performance of part, use the present invention greatly can also reduce production cost.
Accompanying drawing explanation
Fig. 1 is the structural representation with large degree of depth rectangular hole part of the present invention.
Fig. 2 is the fundamental diagram that step 4) of the present invention obtains finish-forging blank.
Fig. 3 is pre-punched hole fundamental diagram in step 5) of the present invention.
Fig. 4 is trimming fundamental diagram in step 5) of the present invention.
Fig. 5 is step 6) finish-forging punch work schematic diagram of the present invention.
Fig. 6 is A-A view in Fig. 5.
In figure, 1, finish-forging blank, 2, finish-forging patrix, 3, finish-forging counterdie, 4, pre-punched hole drift, 401, the cross section of pre-punched hole drift, 6, pre-punched hole mould, 7, pre-punched hole core, 8, trimming drift, 10, shaving die, 11, finish-forging punching drift, 12, finish-forging part, 13, finish-forging die for punching.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, concrete detailed description is further done to the present invention.
Embodiment 1:
With a forging method for the part of large degree of depth rectangular opening, comprise the following steps:
1), according to the target size of part choose the Fine Steel Casting iron bar that the trade mark is 30, then sawing blank is obtained to bar stock saw cutting.This step can use metal cutting band saw bed to carry out, in order to ensure the success rate that product is final, requiring that the gradient of sawing blank is not more than 2 degree, preferably often crossing the relevant parameter that two hours check a sawing machine, belt speed uses middle-grade, and the blank part that every root saw blade cuts out must not more than 2000.
2), by ready for step 1) sawing blank put in heating furnace and carry out uniform heating treatment, after heating, the temperature of sawing blank is 1150 DEG C; This step can adopt intermediate frequency furnace to heat sawing blank.
3), by step 2) heat after the sawing blank that obtains be placed on friction press it be radially swaged into target size, obtain prefabricated rough forging, in this step, final forging temperature is 1000 DEG C; Sawing bar, from heating furnace is come out of the stove, completes to prefabricated rough forging, and the time is 10 seconds.This step adopts the friction press of J53-1000T, will first use spray gun to clear up flat side of a hammer oxide skin, in case the quality of oxidation skin to forging causes damage before forging and stamping.
4), the forging mold of preheating friction press, the forging mold temperature after the pre-heat treatment is at 250 DEG C.Then prefabricated rough forging step 3) obtained is put in described forging mold and is carried out forging and obtain finish-forging blank, and in this step, final forging temperature is 900 DEG C.This step can be carried out on the friction press of 1000T, and forging mold will first use spray gun clear up the oxide skin in die cavity and adopt water-based graphite to lubricate before using, the graphite of water-based graphite used and the ratio of water are 1:3
~1:5.
5) the finish-forging blank, by step 4) obtained is put in the shaving die of opening-type single-point forcing press and is carried out pre-punched hole and trimming, obtains pre-punched hole blank, and in this step, final forging temperature is 850 DEG C.This step can be carried out on 160T opening-type single-point forcing press.In the pre-punched hole blank that this step obtains, the length of pre-punched hole and width dimensions are respectively 3/4ths of the final rectangular opening length of forging and width dimensions, and the adjacent edge angle of cut in gained hole all adopts arc transition.Can, for remove a part of clout in advance, the finish-forging punching of next step can be made more successfully to carry out after this pre-punched hole step, for the final forging precision of forging is given security.
6), put in the finish-forging punching die of 250T forcing press by the pre-punched hole blank obtained in step 5), forging obtains finish-forging part, and in this step, final forging temperature is not for limit.
After step 6) terminates, use the burr of electric angle grinder to forging to polish, then remove remaining burr with abrasive machine along die parting line.
In order to remove the oxide skin on forging surface, eliminate the internal stress of forging inside, can increase the step of a bead, this step shot diameter used is 1.0 millimeters, and the time of shot-peening is 8 minutes.This step can adopt Q3100 shot-blasting machine to carry out bead.
Embodiment 2:
With a forging method for the part of large degree of depth rectangular opening, comprise the following steps:
1), according to the target size of part choose the Fine Steel Casting iron bar that the trade mark is 30, then sawing blank is obtained to bar stock saw cutting.This step can use metal cutting band saw bed to carry out, in order to ensure the success rate that product is final, requiring that the gradient of sawing blank is not more than 2 degree, preferably often crossing the relevant parameter that two hours check a sawing machine, belt speed uses middle-grade, and the blank part that every root saw blade cuts out must not more than 2000.
2), by ready for step 1) sawing blank put in heating furnace and carry out uniform heating treatment, after heating, the temperature of sawing blank is 1175 DEG C; This step can adopt intermediate frequency furnace to heat sawing blank.
3), by step 2) heat after the sawing blank that obtains be placed on friction press it be radially swaged into target size, obtain prefabricated rough forging, in this step, final forging temperature is 1050 DEG C; Sawing bar, from heating furnace is come out of the stove, completes to prefabricated rough forging, and the time is 12 seconds.This step adopts the friction press of J53-1000T, will first use spray gun to clear up flat side of a hammer oxide skin, in case the quality of oxidation skin to forging causes damage before forging and stamping.
4), the forging mold of preheating friction press, the forging mold temperature after the pre-heat treatment is at 300 DEG C.Then prefabricated rough forging step 3) obtained is put in described forging mold and is carried out forging and obtain finish-forging blank, and in this step, final forging temperature is 925 DEG C.This step can be carried out on the friction press of 1000T, and forging mold will first use spray gun clear up the oxide skin in die cavity and adopt water-based graphite to lubricate before using, the graphite of water-based graphite used and the ratio of water are 1:3
~1:5.
5) the finish-forging blank, by step 4) obtained is put in the shaving die of opening-type single-point forcing press and is carried out pre-punched hole and trimming, obtains pre-punched hole blank, and in this step, final forging temperature is 875 DEG C.This step can be carried out on 160T opening-type single-point forcing press.In the pre-punched hole blank that this step obtains, the length of pre-punched hole and width dimensions are respectively 5/6ths of the final rectangular opening length of forging and width dimensions, and the adjacent edge angle of cut in gained hole all adopts arc transition.Can, for remove a part of clout in advance, the finish-forging punching of next step can be made more successfully to carry out after this pre-punched hole step, for the final forging precision of forging is given security.
6), put in the finish-forging punching die of 250T forcing press by the pre-punched hole blank obtained in step 5), forging obtains finish-forging part, and in this step, final forging temperature is not for limit.
After step 6) terminates, use the burr of electric angle grinder to forging to polish, then remove remaining burr with abrasive machine along die parting line.
In order to remove the oxide skin on forging surface, eliminate the internal stress of forging inside, can increase the step of a bead, this step shot diameter used is 1.2 millimeters, and the time of shot-peening is 10 minutes.This step can adopt Q3100 shot-blasting machine to carry out bead.
Embodiment 3:
With a forging method for the part of large degree of depth rectangular opening, comprise the following steps:
1), according to the target size of part choose the Fine Steel Casting iron bar that the trade mark is 30, then sawing blank is obtained to bar stock saw cutting.This step can use metal cutting band saw bed to carry out, in order to ensure the success rate that product is final, requiring that the gradient of sawing blank is not more than 2 degree, preferably often crossing the relevant parameter that two hours check a sawing machine, belt speed uses middle-grade, and the blank part that every root saw blade cuts out must not more than 2000.
2), by ready for step 1) sawing blank put in heating furnace and carry out uniform heating treatment, after heating, the temperature of sawing blank is 1200 DEG C; This step can adopt intermediate frequency furnace to heat sawing blank.
3), by step 2) heat after the sawing blank that obtains be placed on friction press it be radially swaged into target size, obtain prefabricated rough forging, in this step, final forging temperature is 1100 DEG C; Sawing bar, from heating furnace is come out of the stove, completes to prefabricated rough forging, and the time is 15 seconds.This step adopts the friction press of J53-1000T, will first use spray gun to clear up flat side of a hammer oxide skin, in case the quality of oxidation skin to forging causes damage before forging and stamping.
4), the forging mold of preheating friction press, the forging mold temperature after the pre-heat treatment is at 400 DEG C.Then prefabricated rough forging step 3) obtained is put in described forging mold and is carried out forging and obtain finish-forging blank, and in this step, final forging temperature is 950 DEG C.This step can be carried out on the friction press of 1000T, and forging mold will first use spray gun clear up the oxide skin in die cavity and adopt water-based graphite to lubricate before using, the graphite of water-based graphite used and the ratio of water are 1:3
~1:5
5) the finish-forging blank, by step 4) obtained is put in the shaving die of opening-type single-point forcing press and is carried out pre-punched hole and trimming, obtains pre-punched hole blank, and in this step, final forging temperature is 875 DEG C.This step can be carried out on 160T opening-type single-point forcing press.In the pre-punched hole blank that this step obtains, the length of pre-punched hole and width dimensions are respectively 5/6ths of the final rectangular opening length of forging and width dimensions, and the adjacent edge angle of cut in gained hole all adopts arc transition.Can, for remove a part of clout in advance, the finish-forging punching of next step can be made more successfully to carry out after this pre-punched hole step, for the final forging precision of forging is given security.
6), put in the finish-forging punching die of 250T forcing press by the pre-punched hole blank obtained in step 5), forging obtains finish-forging part, and in this step, final forging temperature is not for limit.
After step 6) terminates, use the burr of electric angle grinder to forging to polish, then remove remaining burr with abrasive machine along die parting line.
In order to remove the oxide skin on forging surface, eliminate the internal stress of forging inside, can increase the step of a bead, this step shot diameter used is 1.5 millimeters, and the time of shot-peening is 12 minutes.This step can adopt Q3100 shot-blasting machine to carry out bead.
Claims (8)
1., with a forging method for the part of large degree of depth rectangular opening, it is characterized in that, comprise the following steps:
1), according to the target size of part choose the Fine Steel Casting iron bar that the trade mark is 30 or 35, then sawing blank is obtained to bar stock saw cutting;
2), by ready for step 1) sawing blank put in heating furnace and carry out uniform heating treatment, after heating, the temperature of sawing blank is 1150-1200 DEG C;
3), by step 2) heat after the sawing blank that obtains be placed on friction press it be radially swaged into target size, obtain prefabricated rough forging, in this step, final forging temperature is 1000-1100 DEG C;
4), the forging mold of preheating friction press, the prefabricated rough forging then step 3) obtained is put in described forging mold and is carried out forging and obtain finish-forging blank, and in this step, final forging temperature is 900-950 DEG C;
5) the finish-forging blank, by step 4) obtained is put in the shaving die of opening-type single-point forcing press and is carried out giving punching and trimming, obtains pre-punched hole blank, and in this step, final forging temperature is 850-900 DEG C.
6), put into by the pre-punched hole blank obtained in step 5) in the finish-forging punching die of the forcing press lower than step 4) press tonnage used, forging obtains finish-forging part, and in this step, final forging temperature is not for limit.
2. the forging method of a kind of part with large degree of depth rectangular opening according to claim 1, is characterized in that: step 2) in, after heating, the temperature of sawing blank is 1175 DEG C.
3. the forging method of a kind of part with large degree of depth rectangular opening according to claim 1, it is characterized in that: in step 4), the forging mold temperature after the pre-heat treatment is between 250-400 DEG C.
4. the forging method of a kind of part with large degree of depth rectangular opening according to any one of claim 1-3, it is characterized in that: in step 4), final forging temperature is 925 DEG C.
5. the forging method of a kind of part with large degree of depth rectangular opening according to claim 1, is characterized in that: the final forging temperature in step 5) is 875 DEG C.
6. the forging method of a kind of part with large degree of depth rectangular opening according to claim 1, is characterized in that: sawing bar, from heating furnace is come out of the stove, completes to prefabricated rough forging, time≤15 seconds.
7. the forging method of a kind of part with large degree of depth rectangular opening according to claim 1, it is characterized in that: the step also after step 6) with a bead, this step shot diameter used is 1.0 ~ 1.5 millimeters, and the time of shot-peening is 8 minutes ~ 12 minutes.
8. the forging method of a kind of part with large degree of depth rectangular opening according to claim 7, is characterized in that: in described bead blasting step, and the time of shot-peening is 10 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410506785.XA CN104439913A (en) | 2014-09-28 | 2014-09-28 | Forging method for part with great-depth rectangular hole |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410506785.XA CN104439913A (en) | 2014-09-28 | 2014-09-28 | Forging method for part with great-depth rectangular hole |
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|---|---|
| CN104439913A true CN104439913A (en) | 2015-03-25 |
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|---|---|---|---|
| CN201410506785.XA Pending CN104439913A (en) | 2014-09-28 | 2014-09-28 | Forging method for part with great-depth rectangular hole |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105274916A (en) * | 2015-10-16 | 2016-01-27 | 安徽省巢湖铸造厂有限责任公司 | Novel method for cleaning embedded iron seat of heavy-duty freight railway fastener |
| CN111203504A (en) * | 2020-01-06 | 2020-05-29 | 济宁市宁润文正锻造有限公司 | Forging production method of large-size track shoe |
Citations (5)
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| JPH03285734A (en) * | 1990-03-30 | 1991-12-16 | Sumitomo Metal Ind Ltd | Formation of forged part having square hole |
| TW342358B (en) * | 1997-05-28 | 1998-10-11 | chuang-yi Zhang | Process for producing a bicycle crank with increased capacity and reduced cost |
| CN101391368A (en) * | 2008-10-30 | 2009-03-25 | 江苏森威精锻有限公司 | Processing method of deep-hole pin bush parts |
| CN101422861A (en) * | 2008-11-27 | 2009-05-06 | 江苏森威精锻有限公司 | Accurate forming method of special-shape deep-hole type parts |
| CN103846336A (en) * | 2012-12-04 | 2014-06-11 | 庄河市天成机械有限公司 | Finish machining process for cold-punching special-shaped square holes |
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2014
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03285734A (en) * | 1990-03-30 | 1991-12-16 | Sumitomo Metal Ind Ltd | Formation of forged part having square hole |
| TW342358B (en) * | 1997-05-28 | 1998-10-11 | chuang-yi Zhang | Process for producing a bicycle crank with increased capacity and reduced cost |
| CN101391368A (en) * | 2008-10-30 | 2009-03-25 | 江苏森威精锻有限公司 | Processing method of deep-hole pin bush parts |
| CN101422861A (en) * | 2008-11-27 | 2009-05-06 | 江苏森威精锻有限公司 | Accurate forming method of special-shape deep-hole type parts |
| CN103846336A (en) * | 2012-12-04 | 2014-06-11 | 庄河市天成机械有限公司 | Finish machining process for cold-punching special-shaped square holes |
Non-Patent Citations (1)
| Title |
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| 何文德等: ""铝合金曲柄冲方孔工艺及模具设计"", 《热加工工艺》, vol. 41, no. 21, 15 November 2012 (2012-11-15) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105274916A (en) * | 2015-10-16 | 2016-01-27 | 安徽省巢湖铸造厂有限责任公司 | Novel method for cleaning embedded iron seat of heavy-duty freight railway fastener |
| CN105274916B (en) * | 2015-10-16 | 2017-11-14 | 安徽省巢湖铸造厂有限责任公司 | A kind of cleaning new method of shipping heavy haul railway fastener preburied iron base |
| CN111203504A (en) * | 2020-01-06 | 2020-05-29 | 济宁市宁润文正锻造有限公司 | Forging production method of large-size track shoe |
| CN111203504B (en) * | 2020-01-06 | 2022-09-13 | 济宁市宁润文正锻造有限公司 | Forging production method of large-size track shoe |
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