CN105081191A - Non-flange forging method of thrust rod head - Google Patents
Non-flange forging method of thrust rod head Download PDFInfo
- Publication number
- CN105081191A CN105081191A CN201510488775.2A CN201510488775A CN105081191A CN 105081191 A CN105081191 A CN 105081191A CN 201510488775 A CN201510488775 A CN 201510488775A CN 105081191 A CN105081191 A CN 105081191A
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- Prior art keywords
- forging
- slide block
- clamping mechanism
- electric screw
- voussoir
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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
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
- B21J5/025—Closed die forging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/02—Special design or construction
- B21J9/027—Special design or construction with punches moving along auxiliary lateral directions
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
In order to realize non-flange forging and reduce the material cost and the production cost, the invention proposes a non-flange forging method of a thrust rod head. The method adopts special forging equipment, and comprises the following specific steps: 1) a pre-forging process: a heated round rod is put in a molding cavity of a pre-forging lower mold; after a pre-forging upper mold and the pre-forging lower mold are closed, a wedge mold locking mechanism locks the molds; and then, an electric spiral pressure mechanism drives an upsetting punch to close and extrude the round rod towards the inner sides of the molds to form a pre-forged part; and 2) a final forging process: the pre-forged part is put in a molding cavity of a final forging lower mold on another same forging equipment; after a final forging upper mold and the final forging lower mold are closed, the wedge mold locking mechanism locks the molds; then, left and right electric spiral mechanisms drive two final forging punches to extrude out two ring structures; and meanwhile, the molding cavity is fully filled with blanks to obtain a final-forged blank.
Description
Technical field
The present invention is a kind of forging method of distance rod head, specifically the non-trimming forging method of distance rod head.
Background technology
Distance rod head is one of critical piece in balancing suspension system of heavy-duty car on distance rod assembly.At present distance rod head blank forging as shown in Figure 1 produce and in finished product machine process production cost all very high, have problem anxious to be resolved as follows: forging work step many (work step generally: jumping-up--blocking--finish-forging--trimming), corresponding equipment investment is many, equipment investment is large, energy consumption is large, forging production efficiency is low; Distance rod head planform is that round bar adopts reinforcement and annulus to connect to form, and global sections alters a great deal, such that forging difficulty is large, overlap just causes stock utilization very low very greatly when forging; Because hollow ring structure, in order to the demoulding after blank forging, endoporus must increase when larger pattern draft just causes later stage machined finished product that allowance is very large, work time cost is higher, machined efficiency is low.
Summary of the invention
In order to overcome existing distance rod head rough forging many weak points in process of production, save equipment investment and energy consumption, reduce material cost and production cost, the present invention proposes a kind of non-trimming forging method of distance rod head.
Technical scheme of the present invention is: a kind of non-trimming forging method of distance rod head, it is characterized in that: the structure of the special forging equipment related to is: comprise left column, right column, upper beam, underbeam, slide block, main hydraulic cylinder, bottom knockout hydraulic cylinder, left column, right column, upper beam, underbeam form frame, slide block is led on left column, right column by guiding pair, main hydraulic cylinder is arranged on upper beam, and main hydraulic cylinder drives slide block; Bottom knockout hydraulic cylinder is arranged on below underbeam;
Left column, right column are separately installed with left electric screw mechanism, right electric screw mechanism; The structure of left electric screw mechanism, right electric screw mechanism is identical, concrete structure is: give flywheel through one-level gear power transmission by two motors, give screw pair power transmission again by flywheel, then give slide block by screw pair power transmission, thus realize Power output;
Voussoir, right fixing voussoir are fixed in the left side that is respectively equipped with above of slide block; Be provided with voussoir clamping mechanism below upper beam, voussoir clamping mechanism comprises left voussoir clamping mechanism, right voussoir clamping mechanism, and left voussoir clamping mechanism is made up of left side small cylinder, left movable wedge, and left side small cylinder drives left movable wedge; Right voussoir clamping mechanism is by right side small cylinder; Right movable wedge composition, right side small cylinder drives right movable wedge; The upper surface of left movable wedge, the upper surface of right movable wedge are slidably matched with the lower surface of upper beam respectively;
During use, slide block moves down and puts in place, voussoir clamping mechanism locking sliding block, the tension force produced when overcoming forging and stamping; Left electric screw mechanism, right electric screw mechanism, laterally realize crushing failure at high speed forging;
The concrete steps of non-trimming forging are as follows:
1), pre-forging process: the round bar of heating is put into blocking counterdie die cavity, special forging equipment slide block is under main hydraulic cylinder dynamic action vertically downward, drive blocking patrix to move fast and carry out matched moulds with counterdie, after matched moulds, voussoir clamping mechanism carries out locked mode, then drive jumping-up drift towards die inside sealing extrusion round bar by electric screw press structure, form pre-forging, then electric screw mechanism drives jumping-up drift return, voussoir clamping mechanism return, last slide block return, completes pre-forging process;
2), finish-forging technique: on an other same forging equipment, pre-forging is put into finish-forging counterdie die cavity, special forging equipment slide block is under main hydraulic cylinder dynamic action vertically downward, drive finish-forging patrix to move fast and carry out matched moulds with counterdie, after matched moulds, (special forging equipment) voussoir clamping mechanism carries out locked mode, then left, You Liang electric screw mechanism drives two finish-forging drifts to squeeze out two circular ring structures, make blank be full of die cavity simultaneously, obtain whole rough forging, then two electric screw mechanisms drive two extruding drift returns, voussoir clamping mechanism return, last slide block return, complete forging process.
The invention has the beneficial effects as follows: the present invention is in distance rod head forging process in application, pre-forging closes jumping-up by jumping-up drift after Preform Die matched moulds to have extruded, finish-forging blank is obtained after being full of die cavity by left and right two pre-forging of extruding drift sealing extrusion after whole forging mold matched moulds, because extruding drift is not with pattern draft, blank weight can be alleviated, do not produce overlap in forging process, just can reduce raw-material weight, reach the object reducing raw materials consumption.Apply this forging method and carry out distance rod head forging, equipment investment can be made to save more than 70%, forging blank loss of weight about about 10%, save material about 30%.
Accompanying drawing explanation
Fig. 1 is distance rod head blahk structure sketch of the present invention.
Fig. 2 is the special forging equipment schematic diagram that the present invention relates to.
Fig. 3 is the special forging equipment right view that the present invention relates to.
Fig. 4 is the three-dimensional sketch of Preform Die of the present invention and blank.
Fig. 5 is the three-dimensional sketch of finish-forging die of the present invention and pre-forging.
Fig. 6 is the three-dimensional sketch of mould after the present invention forges and finish-forging part.
Wherein: 1 is left column; 2 is left electric screw mechanism; 3 is left side small cylinder; 4 is left movable wedge; 5 is left fixing voussoir; 6 is main hydraulic cylinder; 7 is upper beam; 8 is right movable wedge; 9 is right fixing voussoir; 10 is slide block; 11 is right side small cylinder; 12 is right electric screw mechanism; 1201 is screw pair; 1202 is slide block; 1203 is flywheel; 1204 is motor; 1205 is one-level gear; 13 is right column; 14 is bottom knockout hydraulic cylinder; 15 is underbeam; 16 is blocking patrix; 17 is blocking counterdie; 18 is heating circle blank; 19 is right jumping-up drift.20 is pre-forging; 21 is finish-forging patrix; 22 is finish-forging counterdie; 23 is left extruding drift; 24 is right extruding drift; 25 is final distance rod head blank.
Detailed description of the invention
As shown in Figure 1, be the distance rod head blahk structure sketch that the present invention relates to.
Special forging equipment as shown in Figure 2, comprise left column 1, right column 13, upper beam 7, underbeam 15, slide block 10, main hydraulic cylinder 6, bottom knockout hydraulic cylinder 14, left column 1, right column 13, upper beam 7, underbeam 15 form frame, slide block 10 is led on left column 1, right column 13 by guiding pair, main hydraulic cylinder 6 is arranged on upper beam 7, and main hydraulic cylinder 6 drives slide block 10; Bottom knockout hydraulic cylinder 14 is arranged on below underbeam, left column, right column is separately installed with left electric screw mechanism 2, right electric screw mechanism 12; Voussoir 5, right fixing voussoir 9 are fixed in the left side that is respectively equipped with above of slide block; Be provided with voussoir clamping mechanism below upper beam, voussoir clamping mechanism comprises left voussoir clamping mechanism, right voussoir clamping mechanism, and left voussoir clamping mechanism is made up of left side small cylinder 3, left movable wedge 4, and left side small cylinder 3 drives left movable wedge 4; Right voussoir clamping mechanism is made up of right side small cylinder 11, right movable wedge 8, and right side small cylinder 11 drives right movable wedge 8; The upper surface of left movable wedge 4, the upper surface of right movable wedge 8 are slidably matched with the lower surface of upper beam 7 respectively;
During use, slide block 10 moves down and puts in place, voussoir clamping mechanism locking sliding block, the tension force produced when overcoming forging and stamping; Left electric screw mechanism, right electric screw mechanism laterally realize crushing failure at high speed forging.
As shown in Figure 2 and Figure 3, in the present invention, the structure of left electric screw mechanism and right electric screw mechanism is identical, the structure of right electric screw mechanism is: by two motors 1204 through one-level gear 1205 power transmission to flywheel 1203, by flywheel 1203 again power transmission to screw pair 1201, again by screw pair 1201 power transmission to slide block 1202, thus realize the Power output of electric screw mechanism.
Bottom knockout hydraulic cylinder according to different products, can adjust angle of inclination.
The present invention adopt the major function of special forging equipment to be as shown in Figure 2: slide block (or upwards) can carry out quick-make (or opening) mould vertically downward under the dynamic action of main hydraulic cylinder; After closed (or opening) mould, two oil cylinders on left and right two columns drive voussoir can snap in (or exiting) respectively and realize mould locking (or unblanking) between upper beam and slide block; After locking (or unblanking) mould, the active drift of two electric screw press structure bands of left and right transverse movement can carry out crushing failure at high speed forging (or returning); When needing to eject forging, material jacking mechanism according to different products, can adjust the angle of inclination of ejector beam.
Due to the use of above-mentioned special forging equipment, the present invention produces distance rod head blank as shown in Figure 1.
In the present invention, the structure of described left electric screw mechanism and right electric screw mechanism is prior art, has two kinds of situations:
The first can be the screw conveyer of direct-drive electric screw press, comprises motor, the flywheel by motor direct-drive, the screw rod be fixed on flywheel, the slide block that driven by screw pair by screw rod;
The second, can be through the screw conveyer of the electric screw press that one-level gear transmits, comprise multiple motor, the rotating shaft of multiple motor is fixed with travelling gear, travelling gear engages with the edge of flywheel, realizes power transmission; Screw rod is fixedly connected with flywheel, the slide block driven by screw pair by screw rod.
Embodiment: as Fig. 4, Fig. 5, shown in Fig. 6, describe the process of forging distance rod head blank of the present invention in detail: during production, the round blank 18 of heating is put into blocking counterdie 17 die cavity, forging equipment (adopt the forging equipment shown in Fig. 2) slide block is under main hydraulic cylinder dynamic action vertically downward, blocking patrix 16 and blocking counterdie 17 is driven to close, under downward dynamic action, matched moulds is carried out to blocking counterdie 17, after matched moulds, formed in pre-forging by voussoir clamping mechanism, the locked mode of bed die, now right electric screw mechanism promotes jumping-up drift 19 fast and applies to carry out closed jumping-up extruding towards the power inside die cavity to blank, then electric screw mechanism drives jumping-up drift return, left again, right actuator cylinder drives two voussoir returns, last slide block drives blocking patrix 16 return, complete the pre-forging 20 that blank pre-forging obtains non-trimming, again pre-forging 20 is put into the die cavity of finish-forging counterdie 22, on the special forging equipment that another is identical with blocking, slide block is under main hydraulic cylinder dynamic action vertically downward, after closed with finish-forging counterdie 22 under the dynamic action driving finish-forging patrix 21 forging press downward, finish-forging patrix 21 is formed by voussoir clamping mechanism after matched moulds, the locked mode of counterdie 22, now left, right two electric screw slide blocks promote left extruding drift 23 fast, right extruding drift 24 squeezes out two circular ring structures, make blank be full of die cavity simultaneously, then electric screw mechanism drives two extruding drift returns, left again, right actuator cylinder drives two voussoir returns, last slide block drives finish-forging patrix 21 return, obtain distance rod head blank 25, complete forging process.
Claims (1)
1. the non-trimming forging method of a distance rod head, it is characterized in that: the structure of the special forging equipment related to is: comprise left column, right column, upper beam, underbeam, slide block, main hydraulic cylinder, bottom knockout hydraulic cylinder, left column, right column, upper beam, underbeam form frame, slide block is led on left column, right column by guiding pair, main hydraulic cylinder is arranged on upper beam, and main hydraulic cylinder drives slide block; Bottom knockout hydraulic cylinder is arranged on below underbeam;
Left column, right column are separately installed with left electric screw mechanism, right electric screw mechanism; The structure of left electric screw mechanism, right electric screw mechanism is identical, concrete structure is: give flywheel through one-level gear power transmission by two motors, give screw pair power transmission again by flywheel, then give slide block by screw pair power transmission, thus realize Power output;
Voussoir, right fixing voussoir are fixed in the left side that is respectively equipped with above of slide block; Be provided with voussoir clamping mechanism below upper beam, voussoir clamping mechanism comprises left voussoir clamping mechanism, right voussoir clamping mechanism, and left voussoir clamping mechanism is made up of left side small cylinder, left movable wedge, and left side small cylinder drives left movable wedge; Right voussoir clamping mechanism is by right side small cylinder; Right movable wedge composition, right side small cylinder drives right movable wedge; The upper surface of left movable wedge, the upper surface of right movable wedge are slidably matched with the lower surface of upper beam respectively;
During use, slide block moves down and puts in place, voussoir clamping mechanism locking sliding block, the tension force produced when overcoming forging and stamping; Left electric screw mechanism, right electric screw mechanism, laterally realize crushing failure at high speed forging;
The concrete steps of non-trimming forging are as follows:
1), pre-forging process: the round bar of heating is put into blocking counterdie die cavity, special forging equipment slide block is under main hydraulic cylinder dynamic action vertically downward, drive blocking patrix to move fast and carry out matched moulds with counterdie, after matched moulds, voussoir clamping mechanism carries out locked mode, then drive jumping-up drift towards die inside sealing extrusion round bar by electric screw press structure, form pre-forging, then electric screw mechanism drives jumping-up drift return, voussoir clamping mechanism return, last slide block return, completes pre-forging process;
2), finish-forging technique: on an other same forging equipment, pre-forging is put into finish-forging counterdie die cavity, special forging equipment slide block is under main hydraulic cylinder dynamic action vertically downward, drive finish-forging patrix to move fast and carry out matched moulds with counterdie, after matched moulds, (special forging equipment) voussoir clamping mechanism carries out locked mode, then left, You Liang electric screw mechanism drives two finish-forging drifts to squeeze out two circular ring structures, make blank be full of die cavity simultaneously, obtain whole rough forging, then two electric screw mechanisms drive two extruding drift returns, voussoir clamping mechanism return, last slide block return, complete forging process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510488775.2A CN105081191A (en) | 2015-08-12 | 2015-08-12 | Non-flange forging method of thrust rod head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510488775.2A CN105081191A (en) | 2015-08-12 | 2015-08-12 | Non-flange forging method of thrust rod head |
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| Publication Number | Publication Date |
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| CN105081191A true CN105081191A (en) | 2015-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510488775.2A Pending CN105081191A (en) | 2015-08-12 | 2015-08-12 | Non-flange forging method of thrust rod head |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106881438A (en) * | 2017-04-17 | 2017-06-23 | 辽宁五八内燃机配件有限公司 | Blank-making method and device are forged in a kind of large forgings |
| CN109108584A (en) * | 2018-10-15 | 2019-01-01 | 西南铝业（集团）有限责任公司 | A kind of production technology of aluminium lithium alloy cone cylinder |
| CN109108101A (en) * | 2018-08-23 | 2019-01-01 | 重庆三峡学院 | A kind of multidirectional extruding near-net-shape method of heavy wall four-way pipe |
| CN109201997A (en) * | 2017-07-03 | 2019-01-15 | 上海昌强重工机械有限公司 | The processing mold and its processing technology of large-scale built-up crankshaft crank peculiar to vessel |
| CN109732026A (en) * | 2019-01-22 | 2019-05-10 | 武汉重工铸锻有限责任公司 | Mold and usage for local die forging both ends abnormity connecting rod |
| CN111151694A (en) * | 2020-01-16 | 2020-05-15 | 十堰亨昌源汽车零部件有限公司 | Optimized V-shaped thrust rod head and forming method |
| CN115415745A (en) * | 2022-09-09 | 2022-12-02 | 江苏双环齿轮有限公司 | Production process of multi-step precision die forging of shafting containing holes |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08206882A (en) * | 1995-02-07 | 1996-08-13 | Amada Co Ltd | Ram driving device for press |
| DE19507056A1 (en) * | 1995-03-01 | 1996-09-05 | Hasenclever Maschf Sms | Screw press and method for operating a screw press |
| CN103406477A (en) * | 2013-08-27 | 2013-11-27 | 江苏大学 | One-time-closing multidirectional repeated local load forming method |
| CN203437574U (en) * | 2013-07-26 | 2014-02-19 | 柳州市诚信机械有限公司 | Thermal enclosed forging die for piston rod of engineering machinery |
| CN103802343A (en) * | 2014-01-17 | 2014-05-21 | 西安交通大学 | Two-way horizontal servo pressure machine for transmission of planet roller lead screw |
| CN104117613A (en) * | 2014-07-11 | 2014-10-29 | 江苏隆盛钻采机械制造有限公司 | Totally-closed multi-direction horizontal type die forging technology special for oil drill rod joint |
| US20150190855A1 (en) * | 2014-01-09 | 2015-07-09 | Rolls-Royce Plc | Forging apparatus |
-
2015
- 2015-08-12 CN CN201510488775.2A patent/CN105081191A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08206882A (en) * | 1995-02-07 | 1996-08-13 | Amada Co Ltd | Ram driving device for press |
| DE19507056A1 (en) * | 1995-03-01 | 1996-09-05 | Hasenclever Maschf Sms | Screw press and method for operating a screw press |
| CN203437574U (en) * | 2013-07-26 | 2014-02-19 | 柳州市诚信机械有限公司 | Thermal enclosed forging die for piston rod of engineering machinery |
| CN103406477A (en) * | 2013-08-27 | 2013-11-27 | 江苏大学 | One-time-closing multidirectional repeated local load forming method |
| US20150190855A1 (en) * | 2014-01-09 | 2015-07-09 | Rolls-Royce Plc | Forging apparatus |
| CN103802343A (en) * | 2014-01-17 | 2014-05-21 | 西安交通大学 | Two-way horizontal servo pressure machine for transmission of planet roller lead screw |
| CN104117613A (en) * | 2014-07-11 | 2014-10-29 | 江苏隆盛钻采机械制造有限公司 | Totally-closed multi-direction horizontal type die forging technology special for oil drill rod joint |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106881438A (en) * | 2017-04-17 | 2017-06-23 | 辽宁五八内燃机配件有限公司 | Blank-making method and device are forged in a kind of large forgings |
| CN109201997A (en) * | 2017-07-03 | 2019-01-15 | 上海昌强重工机械有限公司 | The processing mold and its processing technology of large-scale built-up crankshaft crank peculiar to vessel |
| CN109108101A (en) * | 2018-08-23 | 2019-01-01 | 重庆三峡学院 | A kind of multidirectional extruding near-net-shape method of heavy wall four-way pipe |
| CN109108584A (en) * | 2018-10-15 | 2019-01-01 | 西南铝业（集团）有限责任公司 | A kind of production technology of aluminium lithium alloy cone cylinder |
| CN109732026A (en) * | 2019-01-22 | 2019-05-10 | 武汉重工铸锻有限责任公司 | Mold and usage for local die forging both ends abnormity connecting rod |
| CN109732026B (en) * | 2019-01-22 | 2023-10-20 | 武汉重工铸锻有限责任公司 | Die for partially die forging special-shaped connecting rod with two ends and use method |
| CN111151694A (en) * | 2020-01-16 | 2020-05-15 | 十堰亨昌源汽车零部件有限公司 | Optimized V-shaped thrust rod head and forming method |
| CN115415745A (en) * | 2022-09-09 | 2022-12-02 | 江苏双环齿轮有限公司 | Production process of multi-step precision die forging of shafting containing holes |
| CN115415745B (en) * | 2022-09-09 | 2024-01-26 | 江苏双环齿轮有限公司 | Production process of multi-step precision die forging with hole shafting |
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