CN110479938B - Forging forming die and method for flange ball valve forge piece - Google Patents
Forging forming die and method for flange ball valve forge piece Download PDFInfo
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- CN110479938B CN110479938B CN201910708087.0A CN201910708087A CN110479938B CN 110479938 B CN110479938 B CN 110479938B CN 201910708087 A CN201910708087 A CN 201910708087A CN 110479938 B CN110479938 B CN 110479938B
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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
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/20—Making machine elements valve parts
- B21K1/24—Making machine elements valve parts valve bodies; valve seats
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention relates to forging, in particular to a forging forming die and a forming method of a flange ball valve forging. The device comprises an upper die and a lower die matched with the upper die, wherein the upper die is provided with a pre-forging upper die body and a finish-forging upper die body; the lower surface of the upper preforging die body is provided with an annular groove structure, the lower preforging die is provided with an annular convex part matched with the groove structure, and a vertical blind hole is formed in the convex part; the finish forging upper die body is provided with a transverse finish forging upper cavity, the finish forging lower die body is provided with a finish forging lower cavity matched with the finish forging upper cavity, and two sides of the finish forging lower cavity are respectively provided with a horizontal first punch and a horizontal second punch; the lower die is provided with a pre-forging piece ejection mechanism and a finish forging piece ejection mechanism. The invention has the advantages of high material utilization rate and production efficiency, high product qualification rate, short production period, low energy consumption and low cost.
Description
Technical Field
The invention relates to forging, in particular to a forging forming die and a forming method of a flange ball valve forging.
Background
At present, the flange ball valve mainly adopts three forming modes, namely casting, welding after machining and multiple die forging forming. The cast flange ball valve mostly has the phenomena of uneven grain size and low mechanical property, the quality of a casting is unstable, and the defects of segregation, air holes, impurities, cracks and the like can exist. Welded flange ball valve need be after body and two flanges have been processed in the machine, weld into a whole with the triplex again, need thermal treatment and processing hole after the welding, and production cycle is long, and flange ball valve is mostly stainless steel in addition, and the machine adds the waste that the hole not only caused raw and other materials, has more increased the cost. The multiple die forging forming of the flange ball valve is the multiple-fire multiple-step die forging forming, although the qualification rate and the material utilization rate are improved, the production efficiency is low, the heating is required twice, the energy consumption is large, in addition, at least two pressing machines are required, and the equipment cost is high.
Disclosure of Invention
The invention aims to solve the technical problems of providing a forging forming die and a forming method for a flange ball valve forging, aiming at the defects of low qualification rate, long production period, low material utilization rate, high energy consumption and the like existing in the processes of welding and multiple die forging forming after casting and machining of the existing flange ball valve, and the purposes of high material utilization rate, high production efficiency, high qualification rate and low energy consumption can be realized.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a forging forming die for a flange ball valve forging comprises an upper die and a lower die matched with the upper die, wherein the upper die is provided with a pre-forging upper die body and a finish-forging upper die body; the lower surface of the upper preforging die body is provided with an annular groove structure, the lower preforging die is provided with an annular convex part matched with the groove structure, and a vertical blind hole is formed in the convex part; the finish forging upper die body is provided with a transverse finish forging upper cavity, the finish forging lower die body is provided with a finish forging lower cavity matched with the finish forging upper cavity, and two sides of the finish forging lower cavity are respectively provided with a horizontal first punch and a horizontal second punch; the lower die is provided with a pre-forging piece ejection mechanism and a finish forging piece ejection mechanism.
Compared with the prior art, the invention adopting the technical scheme has the beneficial effects that:
only one multi-directional die forging press is needed, the round bar blank is heated once, a pre-forging blank and a flange ball valve forging finished product with a center hole can be obtained under the action of the die forging press once, the material utilization rate and the production efficiency are high, the product qualification rate is high, the production period is short, the energy consumption is low, and the cost is low.
Further, the optimization scheme of the invention is as follows:
the pre-forging ejection mechanism comprises an elastic piece and an ejection piece block, the elastic piece is arranged at the bottom of the blind hole, and the ejection piece block is arranged above the elastic piece.
The finish forging ejection mechanism comprises an ejection rod, the finish forging lower die is provided with an ejection hole which vertically penetrates through the body, the ejection rod is arranged in the ejection hole, and the ejection hole is communicated with a die cavity of the finish forging lower die.
The diameter of the first punch is larger than the diameter of the second punch.
The material of the elastic member is rubber.
A forming method of a forging forming die of a flange ball valve forging comprises the following steps:
A. preliminary forging of a workpiece
1) Opening the die to place a blank: after the first blank is heated and discharged out of the furnace, vertically placing the first blank into a blind hole of a pre-forging lower die body of a lower die;
2) die assembly forging: the upper die descends and the lower die is matched, and the first blank is forged into a first pre-forged blank;
B. finish forging of the first part and pre-forging of the second part
1) Opening the die to place a second blank and a first pre-forging blank: an upper die moves upwards to open the die, the first pre-forging blank is taken out and turned for 90 degrees and then is placed into a specific finish-forging lower die cavity of the finish-forging lower die, and meanwhile, a second blank after being heated is vertically placed into the specific cavity of the pre-forging lower die;
2) die assembly forging: the upper die descends and is matched with the lower die, the second blank is forged into a second pre-forging blank, the first horizontal punch and the second horizontal punch are oppositely extruded and punched, and the first pre-forging blank is finally forged into a finished product of the forged piece;
C. taking a workpiece: moving the upper die upwards, and taking out the finished product of the forge piece;
D. and C, repeating the step B and carrying out the next forging cycle.
Drawings
FIG. 1 is a schematic view illustrating an open state of an embodiment of the present invention;
FIG. 2 is a view A-A of FIG. 1;
FIG. 3 is a view B-B of FIG. 1;
FIG. 4 is a schematic view of a clamped condition of an embodiment of the present invention;
FIG. 5 is a view C-C of FIG. 4;
FIG. 6 is a D-D view of FIG. 4;
FIG. 7 is a schematic illustration of a blank of an embodiment of the invention;
FIG. 8 is a front view of a pre-forged blank of an embodiment of the present invention;
FIG. 9 is a top view of FIG. 8;
FIG. 10 is a schematic representation of a finished forging of an embodiment of the present invention;
FIG. 11 is a left side view of FIG. 10;
in the figure: a lower die 1; pre-forging the lower die body 1-1; a projection 1-2; 1-3 of finish forging lower die bodies; finish forging the lower cavity 1-4; 1-5 of blind holes; ejection holes 1-6; a first horizontal punch 2; an upper die 3; pre-forging the upper die body 3-1; a groove structure 3-2; 3-3 of a finish forging upper die body; finish forging the upper cavity 3-4; an elastic member 4; a top piece block 5; a blank 6; a knock-out lever 7; a pre-forged blank 8; a second horizontal punch 9; and (5) finishing the forging 10.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
Referring to fig. 1, 2 and 3, a forging forming die for a flange ball valve forging comprises a lower die 1, a first horizontal punch 2, an upper die 3, an elastic piece 4, an ejector piece block 5, an ejector rod 7 and a second horizontal punch 9.
The lower die 1 is matched with the upper die 3, the lower die 1 is provided with a pre-forging lower die and a finish-forging lower die, namely a pre-forging lower die body 1-1 and a finish-forging lower die body 1-3, the pre-forging lower die body 1-1 and the finish-forging lower die body 1-3 of the embodiment are of an integral structure, and the pre-forging lower die body 1-1 and the finish-forging lower die body 1-3 are machined on the same rectangular die steel. The upper die 3 is provided with a preforging upper die and a finish forging upper die, namely a preforging upper die body 3-1 and a finish forging upper die body 3-3, and the upper die 3 is of an integral structure. The preforging upper die body 3-1 is matched with the preforging lower die body 1-1, and the final forging upper die body 3-3 is matched with the final forging lower die body 1-3.
An annular groove structure 3-2 is processed on the lower surface of the upper preforging die body 3-1, an annular convex part 1-2 matched with the groove structure 3-2 is processed on the upper surface of the lower preforging die body 1-1, a vertical blind hole 1-5 is processed in the convex part 1-2, and the upper end and the bottom of the blind hole 1-5 are of a stepped hole structure. The pre-forging lower die body 1-1 is provided with a pre-forging piece ejection mechanism, the pre-forging piece ejection mechanism is composed of an elastic piece 4 and an ejection piece block 5, the elastic piece 4 is arranged at the bottom of the blind hole 1-4, the circular ejection piece block 5 is arranged above the elastic piece 4, the elastic piece 4 is made of rubber, and the elastic piece 4 and the ejection piece block 5 are used for ejecting a pre-forging blank out of a cavity of the pre-forging lower die body 1-1, namely the blind hole 1-5 after die opening.
The finish forging upper die body 3-3 is provided with a transverse finish forging upper cavity 3-4, the finish forging lower die body 1-3 is provided with a finish forging lower cavity 1-4, the finish forging lower cavity 1-4 is matched with the finish forging upper cavity 3-4, and the finish forging lower cavity 1-4 and the finish forging upper cavity 3-4 correspond to the shape of a forged piece finished product 10. Two sides of the finish forging lower cavity 1-4 are respectively provided with a first horizontal punch 2 and a second horizontal punch 9, the diameter of the first punch 2 is larger than that of the second punch 9, the first horizontal punch 2 is connected with a first horizontal cylinder of a multi-directional die forging press, and the multi-directional die forging press provides a horizontal upsetting force. The second horizontal punch 9 is connected to a second horizontal cylinder of the multi-directional swaging press, which provides a horizontal piercing force. The final forging lower die body 1-3 is provided with a final forging piece ejection mechanism, the final forging lower die body 1-3 is provided with an ejection hole 1-6 vertically penetrating through the body, an ejection rod 7 is arranged in the ejection hole 1-6, the upper end of the ejection hole 1-6 is communicated with a cavity of the final forging lower die body 1-4, the ejection rod 7 is arranged in the ejection hole 1-6, and the lower end of the ejection rod 7 extends out of the lower surface of the final forging lower die body 1-3. The ejector rod 7 is connected with the lower ejector cylinder, and the multi-directional die forging press provides ejection force to eject the finish-forged forge piece out of the finish-forged lower cavity 1-4.
The forming method of the forging forming die of the flange ball valve forging comprises the following steps:
A. preliminary forging of a workpiece
1) Opening the die to place a blank: referring to fig. 2, a first blank 6 (shown in fig. 7) is heated to a forging temperature and then discharged out of the furnace, and the first blank 6 is vertically placed into a blind hole 1-5 of a pre-forged lower die body 1-1 of a lower die 1;
2) die assembly forging: referring to fig. 5, an upper die 3 descends to be matched with a lower die 1, the upper die 3 adopts pressure control to forge a first blank 6 into a first pre-forged blank 8 (shown in fig. 8 and 9) with a square flange, and an elastic piece 4 is compressed under the action of pressure;
B. finish forging of the first part and pre-forging of the second part
1) Opening the die to place a second blank and a first pre-forging blank: referring to fig. 2 and 3, after the upper die 3 moves upwards and the die is opened, the elastic part 4 ejects the first pre-forging blank 8, the first pre-forging blank 8 is taken out and turned for 90 degrees and then is placed into a finish forging lower cavity 1-4 of the finish forging lower die body 1-3, and meanwhile, the heated second blank is vertically placed into a blind hole 1-5 of the pre-forging lower die body 1-1;
2) die assembly forging: referring to fig. 5 and 6, the upper die 3 descends to be matched with the lower die 1, the second blank is forged into a second pre-forged blank, the first horizontal punch 2 and the second horizontal punch 9 are oppositely extruded and punched, and the first pre-forged blank 8 is finally forged into a finished forged piece product 10;
C. taking a workpiece: the upper die 3 moves upwards, and the finished product 10 of the forge piece is taken out by a manipulator;
D. and C, repeating the step B and carrying out the next forging cycle.
The forging forming method and the forming die thereof only need one multidirectional die forging press, the round bar blank is heated once, a flange ball valve forging with a central hole can be obtained under the action of the press once, the forging is provided with the central hole cavity with a larger size, the material utilization rate and the production efficiency are high, the production period is short, and the energy consumption is low.
The preforging die and the finish forging die can also be made into a split structure and then combined into a whole.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined in the appended claims.
Claims (2)
1. The utility model provides a forging forming die of flange ball valve forging, includes the mould, with last mould complex lower mould, its characterized in that: the upper die is provided with a pre-forging upper die body and a finish-forging upper die body, the lower die is provided with a pre-forging lower die body and a finish-forging lower die body, the pre-forging upper die body is matched with the pre-forging lower die body, and the finish-forging upper die body is matched with the finish-forging lower die body; the lower surface of the upper preforging die body is provided with an annular groove structure, the lower preforging die body is provided with an annular convex part matched with the groove structure, and a vertical blind hole is formed in the convex part; the finish forging upper die body is provided with a transverse finish forging upper cavity, the finish forging lower die body is provided with a finish forging lower cavity matched with the finish forging upper cavity, and a first horizontal punch and a second horizontal punch are respectively arranged on two sides of the finish forging lower cavity; the lower die is provided with a pre-forging piece ejection mechanism and a finish forging piece ejection mechanism;
the pre-forging piece ejection mechanism comprises an elastic piece and an ejection piece block, the elastic piece is arranged at the bottom of the blind hole, and the ejection piece block is arranged above the elastic piece;
the finish forging ejection mechanism comprises an ejection rod, the finish forging lower die is provided with an ejection hole which vertically penetrates through the body, the ejection rod is arranged in the ejection hole, and the ejection hole is communicated with a die cavity of the finish forging lower die;
the diameter of the first horizontal punch is larger than that of the second horizontal punch;
the material of the elastic member is rubber.
2. The forming method of the forging forming die of the flange ball valve forging as claimed in claim 1, characterized by comprising the following steps:
A. preliminary forging of a workpiece
1) Opening the die to place a blank: after the first blank is heated and discharged out of the furnace, vertically placing the first blank into a blind hole of a pre-forging lower die body of a lower die;
2) die assembly forging: the upper die descends and the lower die is matched, and the first blank is forged into a first pre-forged blank;
B. finish forging of the first part and pre-forging of the second part
1) Opening the die to place a second blank and a first pre-forging blank: an upper die moves upwards to open the die, the first pre-forging blank is taken out and turned for 90 degrees and then is placed into a finish-forging lower die body finish-forging lower die cavity, and meanwhile, a second blank after heating is vertically placed into a blind hole of the pre-forging lower die body;
2) die assembly forging: the upper die descends and is matched with the lower die, the second blank is forged into a second pre-forging blank, the first horizontal punch and the second horizontal punch are oppositely extruded and punched, and the first pre-forging blank is finally forged into a finished product of the forged piece;
C. taking a workpiece: moving the upper die upwards, and taking out the finished product of the forge piece;
D. and C, repeating the step B and carrying out the next forging cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910708087.0A CN110479938B (en) | 2019-08-01 | 2019-08-01 | Forging forming die and method for flange ball valve forge piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910708087.0A CN110479938B (en) | 2019-08-01 | 2019-08-01 | Forging forming die and method for flange ball valve forge piece |
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| Publication Number | Publication Date |
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| CN110479938A CN110479938A (en) | 2019-11-22 |
| CN110479938B true CN110479938B (en) | 2020-12-15 |
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| CN111745116A (en) * | 2020-07-21 | 2020-10-09 | 郎溪浩良锻造有限公司 | Forging forming device and method for excavator flange |
| CN114160732A (en) * | 2021-12-15 | 2022-03-11 | 陕西宏远航空锻造有限责任公司 | Forging method of high-boss TC18 titanium alloy die forging |
| CN115383029A (en) * | 2022-08-31 | 2022-11-25 | 中冶重工（唐山）有限公司 | Multidirectional die forging die for coupler knuckle forging of railway locomotive and forming process of multidirectional die forging die |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60213330A (en) * | 1984-04-09 | 1985-10-25 | Honda Motor Co Ltd | Production of suction and exhaust valves for internal- combustion engine |
| JP2004188454A (en) * | 2002-12-11 | 2004-07-08 | Daido Steel Co Ltd | Method and apparatus for producing marine engine valve |
| CN103264137A (en) * | 2012-08-17 | 2013-08-28 | 大连大高阀门股份有限公司 | Flange ball valve body forging technology |
| CN204262259U (en) * | 2014-11-21 | 2015-04-15 | 东风（十堰）汽车锻钢件有限公司 | The half-closed mould of monoblock type Rear Dowel Support forging |
| CN106513553A (en) * | 2017-01-19 | 2017-03-22 | 上海交大中京锻压有限公司 | Forging die for stainless steel single-seat valve body |
| CN106955955B (en) * | 2017-04-05 | 2019-11-12 | 湖州机床厂有限公司 | A kind of multidirectional finish forge production line of valve body enclosed |
| CN109128001A (en) * | 2018-08-11 | 2019-01-04 | 中冶重工（唐山）有限公司 | The forging method of two sheet body ball valve body forging |
| CN209062060U (en) * | 2018-08-16 | 2019-07-05 | 南昌齿轮锻造厂 | One kind being used for duplicate gear blank forging mold |
| CN109128000A (en) * | 2018-09-13 | 2019-01-04 | 中冶重工（唐山）有限公司 | Forging method with main flange valve body forging |
| CN109465375B (en) * | 2018-12-25 | 2020-03-31 | 沈阳鑫源铁路器材配件有限公司 | Die forging method for high-speed railway turnout iron seat |
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