CN110802191A - Cup-shaped body forming die with boss at bottom of inner cavity and process - Google Patents
Cup-shaped body forming die with boss at bottom of inner cavity and process Download PDFInfo
- Publication number
- CN110802191A CN110802191A CN201910630735.5A CN201910630735A CN110802191A CN 110802191 A CN110802191 A CN 110802191A CN 201910630735 A CN201910630735 A CN 201910630735A CN 110802191 A CN110802191 A CN 110802191A
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- Prior art keywords
- die
- cup
- boss
- blank
- shaped body
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000000137 annealing Methods 0.000 claims abstract description 5
- 238000010273 cold forging Methods 0.000 claims description 13
- 238000001125 extrusion Methods 0.000 claims description 9
- 238000004080 punching Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 238000005422 blasting Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000007127 saponification reaction Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 abstract description 2
- 238000005520 cutting process Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
Images
Classifications
-
- 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
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
-
- 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
-
- 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
- B21J13/08—Accessories for handling work or tools
- B21J13/14—Ejecting devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention provides a cup-shaped body forming die with a boss at the bottom of an inner cavity, which comprises an upper die assembly and a lower die assembly, wherein the upper die assembly comprises an upper die frame and a punch head arranged on the upper die frame; the lower die frame component comprises a lower die frame and a female die arranged on the lower die frame, the female die is provided with a die cavity matched with the punch, and the punch and the female die are matched with each other to extrude a blank to form a workpiece. The cup-shaped body is made of low-carbon steel, the blank is subjected to a high-temperature annealing process, and the nodularity of the blank is controlled within a certain range, so that the cold hardening effect of the blank is improved, and the requirements of the strength and the cutting performance of the product are met.
Description
Technical Field
The invention belongs to a cold forging process and a die, and particularly relates to a cup-shaped body upper forming process with a boss at the bottom of an inner cavity and a die thereof.
Background
The existing cup-shaped cold forging forming die with the boss in the inner cavity can be formed only by multiple times of cold forging, so that the problems of multiple working procedures and long period are caused.
Disclosure of Invention
The invention aims to provide a forming die and a process for a cup-shaped body with a boss at the bottom of an inner cavity, which can form the cup-shaped body with the boss at the bottom of the inner cavity in one step.
According to one aspect of the invention, a cup-shaped body forming die with a boss at the bottom of an inner cavity and a boss at the bottom of the inner cavity comprises an upper die assembly and a lower die assembly,
the upper die frame component comprises an upper die frame and a punch head arranged on the upper die frame, the transition part between the side wall and the bottom of the punch head is a fillet, the punch head is provided with an upper socket-shaped structure, the upper socket-shaped structure is a protrusion which is concave towards the end part of the punch head, and the inner bottom of the upper socket-shaped structure is a small protrusion which is concave towards the same direction as the inner bottom of the upper socket-shaped structure;
the lower die frame component comprises a lower die frame and a female die arranged on the lower die frame, the female die is provided with a die cavity matched with the punch, and the punch and the female die are matched with each other to extrude a blank to form a workpiece.
In some embodiments, the upper die assembly further comprises:
the end part of the upper die extends outwards along the vertical direction of the side wall of the upper die to form a fixing ring, and the fixing ring is fixed on the upper die frame through a screw;
and the punch head sleeve is sleeved outside the punch head to fix the punch head, and the punch head is pre-tightened on the upper die sleeve through the combining cap.
In some embodiments, the lower die assembly further comprises:
a lower die sleeve fixed on the lower die frame through bolts,
the guide sleeve is arranged on the lower die frame through a fixing assembly, the guide sleeve is sleeved on the female die to fix the female die, the guide sleeve is connected with the female die through a spigot, a pressing plate is sleeved outside the guide sleeve, and the pressing plate is fixed on the lower die sleeve through a bolt;
and the female die fixing seat is arranged in the lower die sleeve, and the female die fixing seat is sleeved outside the female die to fix the female die.
In some embodiments, the lower die assembly further comprises a lower ejector pin, an ejector pressure block, an ejector fill block, and an ejector,
the lower die carrier is provided with a through hole, one end of the lower ejector rod penetrates through the through hole and penetrates through the stripper pressure block, the upper surface of the stripper pressure block abuts against the lower surface of the stripper filling block, the lower ejector rod is connected with the stripper filling block, the stripper filling block is connected with the stripper, and the stripper abuts against a workpiece to eject the workpiece.
In some embodiments, a locating ring is provided between the lower die sleeve and the lower die sleeve pressure block.
According to another aspect of the invention, a process for forming a cup-shaped body with a boss at the bottom of an inner cavity is provided, wherein a blank is formed by cold forging by using the cup-shaped body forming die with the boss at the bottom of the inner cavity, and as the upper die assembly gradually moves towards the lower die assembly:
the punching head starts to extrude after contacting with the blank, the upper socket-shaped structure of the punching head and the blank form a closed space, the height of the boss can not rise after the pressure and the extrusion force formed by the closed space reach balance along with the extrusion, and a plurality of small bulges at the inner bottom of the upper socket-shaped structure of the punching head meet the requirement that the cup-shaped body with the boss at the bottom of the inner cavity is formed when the extrusion is finished from the lower extreme point.
In some embodiments, the method further comprises a pre-forming pretreatment before the forming process, the pre-forming pretreatment comprising:
blanking: sawing bars with proper length and diameter to prepare for the following procedures;
annealing at high temperature, softening the material, controlling the spheroidization rate of the blank and preparing for cold forging;
blank making, wherein the defects on the surface of the raw material are removed to reach the specified weight;
shot blasting is carried out, the surface area of the blank is increased, rust is removed, and preparation is made for pretreatment;
pre-treating, covering the surface of the blank with phosphorus and saponification layer to prepare for cold forging.
The beneficial effects are as follows: the cup-shaped body is made of low-carbon steel, a high-temperature annealing process is adopted for the blank, and the nodularity of the blank is controlled within a certain range, so that the cold-work hardening effect of the blank is improved, and the requirements of the strength and the cutting performance of the product are met;
the structure of the forming punch and the forming die can ensure that the force applied by the forming punch and the forming die keeps balanced inside and outside during forming, so that a blank is formed, and the designed service life of the punch and the die can be reached;
the cup-shaped part with the boss at the bottom is formed by one-time forging, so that the efficiency is improved, and the cost is reduced.
Drawings
FIG. 1 is a schematic structural view of a cup-shaped body forming mold with a boss at the bottom of an inner cavity according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a workpiece made by a cup-shaped body forming mold with a boss at the bottom of an inner cavity according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a punch of a cup-shaped body forming die with a boss at the bottom of an inner cavity according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of an end portion of a punch of a cup-shaped body forming die with a boss at the bottom of an inner cavity according to an embodiment of the present invention.
Detailed Description
Fig. 1-4 schematically show a cup-shaped body forming die with a boss at the bottom of an inner cavity of one embodiment of the invention. As shown in figures 1-4, the cup-shaped body forming die with the boss at the bottom of the inner cavity comprises an upper die assembly and a lower die assembly.
The upper die frame component comprises an upper die frame and a punch 8 arranged on the upper die frame. The transition between the side wall and the bottom of the punch 8 is rounded. The punch 8 is provided with a socket-shaped structure 81. The upper socket 81 is a protrusion that is concave away from the end of the punch 8. The inner bottom of the upper socket structure 81 is concave with a small bulge 82. The upper die assembly further comprises an upper die sleeve 1, an upper die sleeve pressure block 2, a filling block 3, a combining cap 4 and a punch 8 sleeve 5. The end part of the upper die sleeve 1 extends outwards along the vertical direction of the side wall of the upper die sleeve to form a fixing ring, and the fixing ring is fixed on the upper die frame through a screw. The punch sleeve 5 is sleeved on the punch 8. The cap 4 is ring-shaped, and a snap ring extends inwards from the bottom of the cap along the vertical direction of the side wall of the cap. The punch sleeve 5 is pre-tightened on the upper die sleeve through the combining cap 4. The upper die sleeve pressure block 2 is fixedly arranged in the upper die sleeve 1 in a penetrating way, and the upper surface of the upper die sleeve pressure block is attached to the bottom of the upper die frame.
The lower die frame component comprises a lower die frame and a female die 9 arranged on the lower die frame. The female die 9 is provided with a die cavity matched with the punch 8, and the punch 8 and the female die 9 are matched with each other to extrude a blank to form a workpiece. The lower die assembly further comprises a pressing plate 6, a punch 8 guide sleeve 7, a punch 8, a forming female die 9, a lower die sleeve 10, a stripper 11, a lower die sleeve 10 pressure block, a positioning ring 13, a stripper 11 filling block 3, a stripper 11 pressure block and a lower ejector rod. The guide sleeve 7 is sleeved on the female die 9 to fix the female die 9. The guide sleeve is connected with the female die 9 through a spigot. The lateral wall of uide bushing is equipped with the step, and clamp plate 6 is the ring body form, and the hole of clamp plate 6 is taken on the step of fixed outer seat. The two ends of the lower die sleeve 10 are respectively provided with a connecting ring extending outwards along the vertical direction of the side wall of the lower die sleeve, the connecting ring at one end of the lower die sleeve 10 is connected with the pressing plate 6 through a bolt, and the connecting ring at the other end of the lower die sleeve 10 is connected with the lower die frame through a bolt. The lower die carrier is provided with a through hole. One end of the lower ejector rod penetrates through the through hole and is arranged in the stripper pressure block 15. The upper surface of the stripper pressure block 15 abuts against the lower surface of the filler block 33 of the stripper 11. The end of the lower ejector pin is connected to the stripper charge 14. The stripper pad 14 is connected to the stripper 11. The stripper 11 is pressed against the workpiece to eject the workpiece. A lower die sleeve pressure block 12 is arranged between the material stripper 11 and the lower die frame, and a positioning ring 13 is arranged between the lower die sleeve 10 and the lower die sleeve pressure block 12.
The utility model provides a cup body forming process of boss is taken to inner chamber bottom, uses foretell cup body forming die of boss is taken to inner chamber bottom to take the blank cold forging shaping, moves to lower die assembly along with last die assembly gradually: the punch 8 starts to extrude after contacting with the blank, the upper socket-shaped structure of the punch 8 and the blank form a closed space, the height of the boss can not rise after the pressure and the extrusion force formed by the closed space reach balance along with the extrusion, and the small bulges 82 at the inner bottom of the upper socket-shaped structure 81 of the punch 8 meet the requirement that the cup-shaped body with the boss at the bottom of the inner cavity is formed when the extrusion is finished.
The method also comprises pretreatment before forming, wherein the pretreatment before forming comprises the following steps: blanking: sawing bars with proper length and diameter to prepare for the following procedures; annealing at high temperature, softening the material, controlling the spheroidization rate of the blank and preparing for cold forging; blank making, wherein the defects on the surface of the raw material are removed to reach the specified weight; shot blasting, namely increasing the surface area of the blank, removing rust and preparing for the previous treatment; pre-treating, covering the surface of the blank with phosphorus and saponification layer to prepare for cold forging.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept herein, and it is intended to cover all such modifications and variations as fall within the scope of the invention.
Claims (7)
1. A cup-shaped body forming die with a boss at the bottom of an inner cavity is characterized by comprising an upper die assembly and a lower die assembly,
the upper die frame component comprises an upper die frame and a punch head arranged on the upper die frame, the transition part between the side wall and the bottom of the punch head is a fillet, the punch head is provided with an upper socket-shaped structure, the upper socket-shaped structure is a protrusion which is concave inwards back to the end part of the punch head, and the inner bottom of the upper socket-shaped structure is a small protrusion which is concave inwards in the same direction as the inner bottom of the upper socket-shaped structure;
the lower die frame component comprises a lower die frame and a female die arranged on the lower die frame, the female die is provided with a die cavity matched with the punch, and the punch and the female die are matched with each other to extrude a blank to form a workpiece.
2. The cup-shaped body forming die with boss at the bottom of inner cavity of claim 1, wherein the upper die assembly further comprises:
the end part of the upper die extends outwards along the vertical direction of the side wall of the upper die to form a fixing ring, and the fixing ring is fixed on the upper die frame through a screw;
and the punch head sleeve is sleeved outside the punch head to fix the punch head, and the punch head is pre-tightened on the upper die sleeve through the combining cap.
3. The cup-shaped body forming die with boss at the bottom of inner cavity as claimed in claim 1, wherein said lower die assembly further comprises:
a lower die sleeve fixed on the lower die frame through bolts,
the guide sleeve is mounted on the lower die frame through a fixing assembly, sleeved on the female die to fix the female die, connected with the female die through a spigot, sleeved with a pressing plate, and fixed on the lower die sleeve through a bolt;
and the female die fixing seat is arranged in the lower die sleeve, and the female die fixing seat is sleeved outside the female die to fix the female die.
4. The cup-shaped body forming mold with boss at the bottom of inner cavity of claim 3, wherein said lower mold assembly further comprises a lower ejector rod, an ejector pressure block, an ejector filler block and an ejector,
the lower die carrier is provided with a through hole, one end of the lower ejector rod penetrates through the through hole and penetrates through the stripper pressure block, the upper surface of the stripper pressure block abuts against the lower surface of the stripper filling block, the lower ejector rod is connected with the stripper filling block, the stripper filling block is connected with the stripper, and the stripper abuts against a workpiece to eject the workpiece.
5. The forming die for the cup-shaped body with the boss at the bottom of the inner cavity as claimed in claim 4, wherein a positioning ring is arranged between the lower die sleeve and the pressure block of the lower die sleeve.
6. A process for forming a cup-shaped body with a boss at the bottom of an inner cavity, which comprises the steps of using the cup-shaped body forming die with a boss at the bottom of an inner cavity as claimed in any one of claims 1 to 5 to form a blank by cold forging, and moving the upper die assembly gradually towards the lower die assembly:
the punching head starts to extrude after contacting with the blank, the upper socket-shaped structure of the punching head and the blank form a closed space, the height of the boss can not rise after the pressure and the extrusion force formed by the closed space reach balance along with the extrusion, and the small bulges at the inner bottom of the upper socket-shaped structure of the punching head meet the requirement that the cup-shaped body with the boss at the bottom of the inner cavity is formed when the extrusion is finished at the lower extreme point.
7. The forming process of hexagonal cold forging on a cup-shaped body according to claim 6, further comprising a pre-forming pretreatment before the forming process, wherein the pre-forming pretreatment comprises:
blanking: sawing bars with proper length and diameter to prepare for the following procedures;
annealing at high temperature, softening the material, controlling the spheroidization rate of the blank and preparing for cold forging;
blank making, wherein the defects on the surface of the raw material are removed to reach the specified weight;
shot blasting is carried out, the surface area of the blank is increased, rust is removed, and preparation is made for pretreatment;
pre-treating, covering the surface of the blank with phosphorus and saponification layer to prepare for cold forging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910630735.5A CN110802191A (en) | 2019-07-12 | 2019-07-12 | Cup-shaped body forming die with boss at bottom of inner cavity and process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910630735.5A CN110802191A (en) | 2019-07-12 | 2019-07-12 | Cup-shaped body forming die with boss at bottom of inner cavity and process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110802191A true CN110802191A (en) | 2020-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910630735.5A Pending CN110802191A (en) | 2019-07-12 | 2019-07-12 | Cup-shaped body forming die with boss at bottom of inner cavity and process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110802191A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07241644A (en) * | 1994-03-04 | 1995-09-19 | Toyota Motor Corp | Extrusion machine |
| JP2004154794A (en) * | 2002-11-05 | 2004-06-03 | Toyota Motor Corp | Forming die, forming method, and formed product for external tooth profile component with boss |
| CN104588426A (en) * | 2015-01-14 | 2015-05-06 | 江苏创一精锻有限公司 | Energy accumulator tank forging forming process and extrusion die |
| CN105834339A (en) * | 2016-05-27 | 2016-08-10 | 江苏创汽车零部件有限公司 | Energy accumulator tank extrusion die |
| CN106881366A (en) * | 2017-01-23 | 2017-06-23 | 江苏创汽车零部件有限公司 | A kind of accumulator tank body forging cold-forging forming technique and anti-extruding mold |
| CN106903482A (en) * | 2017-01-22 | 2017-06-30 | 盐城理研精密锻造有限公司 | A kind of cold-forge forming technique of thin-wall tube-shaped metal parts |
| CN107755446A (en) * | 2017-09-25 | 2018-03-06 | 中北大学 | A kind of processing technology of raising DT4C pure iron magnetic behaviors |
| CN108687281A (en) * | 2017-04-03 | 2018-10-23 | 玛帝克株式会社 | The manufacturing method of cup-like structure body |
| CN211679821U (en) * | 2019-07-12 | 2020-10-16 | 江苏创一精锻有限公司 | Cup-shaped body forming die with boss at bottom of inner cavity |
-
2019
- 2019-07-12 CN CN201910630735.5A patent/CN110802191A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07241644A (en) * | 1994-03-04 | 1995-09-19 | Toyota Motor Corp | Extrusion machine |
| JP2004154794A (en) * | 2002-11-05 | 2004-06-03 | Toyota Motor Corp | Forming die, forming method, and formed product for external tooth profile component with boss |
| CN104588426A (en) * | 2015-01-14 | 2015-05-06 | 江苏创一精锻有限公司 | Energy accumulator tank forging forming process and extrusion die |
| CN105834339A (en) * | 2016-05-27 | 2016-08-10 | 江苏创汽车零部件有限公司 | Energy accumulator tank extrusion die |
| CN106903482A (en) * | 2017-01-22 | 2017-06-30 | 盐城理研精密锻造有限公司 | A kind of cold-forge forming technique of thin-wall tube-shaped metal parts |
| CN106881366A (en) * | 2017-01-23 | 2017-06-23 | 江苏创汽车零部件有限公司 | A kind of accumulator tank body forging cold-forging forming technique and anti-extruding mold |
| CN108687281A (en) * | 2017-04-03 | 2018-10-23 | 玛帝克株式会社 | The manufacturing method of cup-like structure body |
| CN107755446A (en) * | 2017-09-25 | 2018-03-06 | 中北大学 | A kind of processing technology of raising DT4C pure iron magnetic behaviors |
| CN211679821U (en) * | 2019-07-12 | 2020-10-16 | 江苏创一精锻有限公司 | Cup-shaped body forming die with boss at bottom of inner cavity |
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