CN110576137A - Compact thick-wall flange plate forging die - Google Patents
Compact thick-wall flange plate forging die Download PDFInfo
- Publication number
- CN110576137A CN110576137A CN201910893362.0A CN201910893362A CN110576137A CN 110576137 A CN110576137 A CN 110576137A CN 201910893362 A CN201910893362 A CN 201910893362A CN 110576137 A CN110576137 A CN 110576137A
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- Prior art keywords
- punch
- hole
- die
- flange plate
- compact
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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
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
Abstract
The invention provides a compact thick-wall flange plate forging die which comprises a lower die, a blank holder, a compression spring and a punch, wherein the blank holder is provided with a vertical through hole, a step hole is formed in the through hole, the punch is inserted into the through hole, an annular step is formed in the punch, and the compression spring is arranged between the annular step and the lower bottom surface of the step hole. Ingenious effort and the reaction force that brings with the help of spring compression, the reply, realize the motion of multiple opposite direction, realize forging and pressing, the turn-ups, multiple processing methods such as drawing of patterns, the integrality of metal streamline has been guaranteed, higher mechanical properties has, moreover, compact structure, therefore, the clothes hanger is strong in practicability, still be convenient for the maintenance and the change of mould, whole production process integration degree is high, can be high-efficient, accurate, the production of carrying out the flange fast rhythm, high efficiency, the cycle is short, the centering is accurate, product quality uniformity is high, can obviously improve market competition.
Description
Technical Field
The invention belongs to the technical field of forging and pressing, and particularly relates to a compact thick-wall flange plate forging die.
Background
The plate forging technology is widely used for manufacturing flanges due to the advantages of high material utilization rate and the like, thin-wall flanges are usually produced in a cold forming mode, but thick-wall flanges need to be produced by adopting a hot forming technology. Chinese patent publication No. CN208437593U discloses a flange forging and pressing mold, which includes a primary forging mold and a final forging mold, and has the advantages of one-time heating and closed mold hot extrusion molding, but lacks a demolding tool means, and in the production process, due to the temperature change of the flange forging, after forging and pressing, the flange forging is wrapped on a punch, and the flange is difficult to separate from the mold, so that the production efficiency is reduced, and the popularization and use of the plate forging technology is hindered.
Disclosure of Invention
In order to solve the technical problems, the invention provides a compact thick-wall flange plate forging die which realizes various processing modes such as forging, flanging, demoulding and the like by skillfully utilizing acting force and reacting force caused by spring compression and recovery.
the invention is realized by the following technical scheme.
The compact thick-wall flange plate forging die comprises a lower die, a blank holder, a compression spring and a punch, wherein a vertical through hole is formed in the center of the blank holder, a built-in step hole is formed in the through hole, the punch is inserted into the through hole, an annular step is arranged on the punch and limited in the step hole, the compression spring is arranged between the annular step and the lower bottom surface of the step hole, and the compression spring is sleeved on the punch. The spring is compressed and restored to bring acting force and counterforce, realize the motion of multiple opposite directions, realize multiple processing modes such as forging and pressing, flanging, demoulding, etc.
The size of the punch meets the requirement that the punch is in the whole stroke range, the upper end of the punch keeps extending out of the through hole, the blank holder is reliably positioned, and the blank holder is prevented from being in direct contact with forging equipment, so that the punch cannot completely compress the compression spring to the completely compressed state, the stroke is insufficient, and finally the condition that the plate blank cannot be completely flanged is caused. The stroke range of the punch starts from the state that the annular step is attached to the upper top surface of the step hole of the blank holder, and the punch moves downwards to extrude the compression spring to be in a fully compressed state.
When the annular step position satisfies the contact of annular step and the top surface on the step hole, the lower extreme of drift does not stretch out the through-hole, and the lower terminal surface of drift is located the through-hole, and the blank holder contacts with the slab before the drift during punching press promptly, pushes down the slab, and the slab is fixed stable when guaranteeing the drift punching press, guarantees flange forging machining precision.
The lower end of the punch is provided with an inclined plane, a fillet is arranged at the joint of the inclined plane and the lower end face of the punch, and a slab guide hole is guided to smoothly stretch and turn over the edge in the punching process.
The through-hole is the round hole, and the drift is cylindrical, and the fit clearance tolerance of through-hole and drift is 0.005mm, guarantees blank holder position accuracy, reduces to rock, can stably hold the slab at whole forming process.
The lower mould is the ring, and the hole upper end opening part of lower mould is provided with the counter bore, and the hole of lower mould is provided with the fillet with counter bore end junction, and the fillet provides the support when the slab turns up, provides the certain radius of buckling of slab simultaneously, guarantees the continuity of metal flow line. The height of the counter bore is smaller than the thickness of the plate blank, so that the plate blank can be stably clamped in the forming process, and the machining precision of the flange forging is guaranteed.
The counter bore is circular, can process circular ring flange.
The center line of the punch, the center line of the counter bore and the center line of the lower die inner hole are coaxial, so that accurate positioning of the plate blank is guaranteed, and further the machining precision is guaranteed.
The clearance between the punch and the inner hole of the lower die is larger than the thickness of the plate blank, and the clearance between the flange forging and the inner hole of the lower die still exists after the flange plate is forged and formed, so that the bonding between the inner hole of the lower die and the forging is avoided, and the demolding of the flange forging is facilitated.
In the production process, the plate blank is heated and then subjected to plate forging, due to temperature change, after the flange plate is forged and formed, the flange forging piece is wrapped on the punch, the punch is lifted upwards to reset due to force unloading, the compression spring begins to extend, and the flange is pushed down from the punch by the blank holder under the action of the elastic force of the spring, so that the flange and the die are separated.
The invention has the beneficial effects that:
Compared with the prior art, the invention skillfully utilizes the acting force and the reacting force brought by the compression and the recovery of the spring to realize the movement in various opposite directions, realizes various processing modes such as forging, flanging, demoulding and the like, ensures the integrity of the metal streamline and has higher mechanical property. The blank holder is arranged, so that the mold opening cost is greatly reduced, the structure is compact, the practicability is high, and the maintenance and the replacement of the mold are convenient. The plate with the proper thickness is selected, and the flange plates with different thicknesses can be directly formed by forging, so that the machining allowance is reduced, and the production cost is saved. When the punch is relieved and reset, the spring generates thrust to push the flange forging down from the punch, and automatic separation of the flange forging and the die is realized. The whole production process is high in integration degree, can efficiently, accurately and rapidly produce the flange, is high in efficiency, short in period, accurate in centering and high in product quality consistency, and can obviously improve market competitiveness.
Drawings
FIG. 1 is a schematic view of a die for forging a flange plate according to the present invention;
FIG. 2 is a schematic view of the flange stamping and flanging process of the present invention;
Fig. 3 is a schematic view of the flange plate of the present invention after completion of the forging process.
In the figure: 1-lower die, 2-plate blank, 3-blank holder, 4-compression spring, 5-punch, 11-counter bore, 31-through hole, 32-step hole, 51-annular step and 52-inclined plane.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
As shown in fig. 1 to 2, the compact thick-wall flange plate forging die comprises a lower die 1, a blank holder 3, a compression spring 4 and a punch 5, wherein a vertical through hole 31 is formed in the center of the blank holder 3, a built-in step hole 32 is formed in the through hole 31, the punch 5 is inserted into the through hole 31, an annular step 51 is formed in the punch 5, the annular step 51 is limited in the step hole 32, the compression spring 4 is arranged between the annular step 51 and the lower bottom surface of the step hole 32, and the compression spring 4 is sleeved on the punch 5. The spring is compressed and restored to bring acting force and counterforce, realize the motion of multiple opposite directions, realize multiple processing modes such as forging and pressing, flanging, demoulding, etc.
The size of the punch 5 meets the requirement that the punch 5 is in the whole stroke range, the upper end of the punch 5 keeps extending out of the through hole 31, the blank holder 3 is reliably positioned, and the blank holder 3 is prevented from being in direct contact with forging equipment, so that the punch 5 cannot completely compress the compression spring 4 to be in a completely compressed state, the stroke is insufficient, and the situation that the plate blank 2 cannot be completely flanged is finally caused. The range of the stroke of the punch 5 starts from a state where the annular step 51 is brought into abutment with the upper top face of the step hole 32 of the blank holder 3 until the punch 5 moves downward to press the compression spring 4 to a fully compressed state.
When the position of the annular step 51 meets the condition that the annular step 51 is in top surface contact with the step hole 32, the lower end of the punch 5 does not extend out of the through hole 31, and the lower end surface of the punch 5 is located in the through hole 31, namely, the blank holder 3 is in contact with the plate blank 2 before the punch 5 during punching to press the plate blank 2, so that the plate blank 2 is fixed and stable during punching of the punch 5, and the processing precision of the flange forging is ensured.
The lower end of the punch 5 is provided with an inclined plane 52, a fillet is arranged at the joint of the inclined plane 52 and the lower end face of the punch 5, and the guide hole of the plate blank 2 is guided to be smoothly stretched and flanged in the punching process.
The through hole 31 is a round hole, the punch 5 is cylindrical, the tolerance of the fit clearance between the through hole 31 and the punch 5 is +/-0.005 mm, the position precision of the blank holder 3 is guaranteed, the shaking is reduced, and the blank 2 can be stably pressed in the whole forming process.
The lower die 1 is a circular ring, a counter bore 11 is formed in an opening at the upper end of an inner hole of the lower die 1, a round angle is formed in the joint of the inner hole of the lower die 1 and the counter bore 11, the round angle provides support when the plate blank 2 is turned over, meanwhile, a certain bending radius of the plate blank 2 is provided, and continuity of a metal streamline is guaranteed. The height of the counter bore 11 is smaller than the thickness of the plate blank 2, so that the plate blank 2 can be stably clamped in the forming process, and the machining precision of the flange forging is guaranteed.
The counter bore 11 is circular and can be used for processing a circular flange.
The central line of the punch 5, the central line of the counter bore 11 and the central line of the inner hole of the lower die 1 are coaxial, so that the accurate positioning of the plate blank 2 is ensured, and the processing precision is further ensured.
the clearance between the punch 5 and the inner hole of the lower die 1 is larger than the thickness of the plate blank 2, and after the flange plate is forged and formed, the clearance between the flange forging and the inner hole of the lower die 1 is still kept, so that the bonding between the inner hole of the lower die 1 and the forging is avoided, and the demolding of the flange forging is facilitated.
In the production process, the plate blank 2 is heated and then subjected to plate forging, due to temperature change, after the flange plate forging forming is completed, the flange forging piece is wrapped on the punch 5, the punch 5 is lifted upwards to reset under the unloading force, the compression spring 4 begins to extend, and under the action of the spring elasticity, the blank holder 3 pushes the flange downwards from the punch 5, so that the separation of the flange and the die is realized, and the flange forging piece shown in the figure 3 is obtained.
According to the compact thick-wall flange plate forging die provided by the invention, the action force and the reaction force brought by spring compression and recovery are skillfully utilized, the movement in various opposite directions is realized, various processing modes such as forging, flanging and demolding are realized, the integrity of a metal streamline is ensured, and the die has high mechanical property. The blank holder is arranged, so that the mold opening cost is greatly reduced, the structure is compact, the practicability is high, and the maintenance and the replacement of the mold are convenient. The plate with the proper thickness is selected, and the flange plates with different thicknesses can be directly formed by forging, so that the machining allowance is reduced, and the production cost is saved. When the punch is relieved and reset, the spring generates thrust to push the flange forging down from the punch, and automatic separation of the flange forging and the die is realized. The whole production process is high in integration degree, can efficiently, accurately and rapidly produce the flange, is high in efficiency, short in period, accurate in centering and high in product quality consistency, and can obviously improve market competitiveness.
Claims (9)
1. The utility model provides a thick wall flange board forging die of compact which characterized in that: the stamping die comprises a lower die (1), a blank holder (3), a compression spring (4) and a punch (5), wherein a vertical through hole (31) is formed in the center of the blank holder (3), a built-in step hole (32) is formed in the through hole, the punch (5) is inserted into the through hole (31), an annular step (51) is arranged on the punch (5), the annular step (51) is limited in the step hole (32), the compression spring (4) is arranged between the annular step (51) and the lower bottom surface of the step hole (32), and the compression spring (4) is sleeved on the punch (5).
2. A compact thick-walled flange plate forging die as claimed in claim 1, wherein: the size of the punch (5) is such that the upper end of the punch (5) is kept protruding out of the through hole (31) in the whole stroke range.
3. A compact thick-walled flange plate forging die as claimed in claim 1, wherein: the annular step (51) is positioned so that when the annular step (51) is contacted with the upper top surface of the step hole (32), the lower end of the punch (5) does not extend out of the through hole (31), and the lower end surface of the punch (5) is positioned in the through hole (31).
4. A compact thick-walled flange plate forging die as claimed in claim 1, wherein: the lower end of the punch (5) is provided with an inclined plane (52), and a fillet is arranged at the joint of the inclined plane (52) and the lower end face of the punch (5).
5. A compact thick-walled flange plate forging die as claimed in claim 1, wherein: the through hole (31) is a round hole, the punch (5) is cylindrical, and the tolerance of the fit clearance between the through hole (31) and the punch (5) is +/-0.005 mm.
6. A compact thick-walled flange plate forging die as claimed in claim 1, wherein: the lower die (1) is a circular ring, a counter bore (41) is formed in an opening at the upper end of an inner bore of the lower die (1), a round angle is formed at the joint of the inner bore of the lower die (1) and the bottom of the counter bore (41), and the height of the counter bore (41) is smaller than the thickness of the slab (2).
7. A compact thick-walled flange plate forging die as claimed in claim 6, wherein: the counter bore (41) is circular.
8. A compact thick-walled flange plate forging die as claimed in claim 6, wherein: the center line of the punch head (5), the center line of the counter bore (41) and the center line of the inner hole of the lower die (1) are coaxial.
9. A compact thick-walled flange plate forging die as claimed in claim 6, wherein: the clearance between the punch head (5) and the inner hole of the lower die (1) is larger than the thickness of the plate blank (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910893362.0A CN110576137A (en) | 2019-09-20 | 2019-09-20 | Compact thick-wall flange plate forging die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910893362.0A CN110576137A (en) | 2019-09-20 | 2019-09-20 | Compact thick-wall flange plate forging die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110576137A true CN110576137A (en) | 2019-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910893362.0A Pending CN110576137A (en) | 2019-09-20 | 2019-09-20 | Compact thick-wall flange plate forging die |
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| CN (1) | CN110576137A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03184647A (en) * | 1990-02-09 | 1991-08-12 | Maruyoshi Kogyo Kk | Die for forming header of intermediate fitting for hose |
| WO2014031650A1 (en) * | 2012-08-20 | 2014-02-27 | Standard Lifters, Inc. | Pilot assembly and method for metal forming dies |
| CN207723261U (en) * | 2018-01-12 | 2018-08-14 | 东莞市永田实业有限公司 | A kind of stamping forming fast mode transfer tool |
| CN109482739A (en) * | 2018-12-04 | 2019-03-19 | 贵州航天新力铸锻有限责任公司 | Formed punch blank holder integrated mould |
| CN208929117U (en) * | 2018-09-28 | 2019-06-04 | 浙江希安冀汽车零部件有限公司 | A kind of cotter pilotage cold upsetting forming die |
| CN209334558U (en) * | 2018-12-29 | 2019-09-03 | 东莞市兴海盛精密技术有限公司 | A kind of D-shaped hole punching of abate material list point connection and chamfer mould |
-
2019
- 2019-09-20 CN CN201910893362.0A patent/CN110576137A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03184647A (en) * | 1990-02-09 | 1991-08-12 | Maruyoshi Kogyo Kk | Die for forming header of intermediate fitting for hose |
| WO2014031650A1 (en) * | 2012-08-20 | 2014-02-27 | Standard Lifters, Inc. | Pilot assembly and method for metal forming dies |
| CN207723261U (en) * | 2018-01-12 | 2018-08-14 | 东莞市永田实业有限公司 | A kind of stamping forming fast mode transfer tool |
| CN208929117U (en) * | 2018-09-28 | 2019-06-04 | 浙江希安冀汽车零部件有限公司 | A kind of cotter pilotage cold upsetting forming die |
| CN109482739A (en) * | 2018-12-04 | 2019-03-19 | 贵州航天新力铸锻有限责任公司 | Formed punch blank holder integrated mould |
| CN209334558U (en) * | 2018-12-29 | 2019-09-03 | 东莞市兴海盛精密技术有限公司 | A kind of D-shaped hole punching of abate material list point connection and chamfer mould |
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Application publication date: 20191217 |