CN215355982U - Cold heading die for environment-friendly bolt manufacturing - Google Patents
Cold heading die for environment-friendly bolt manufacturing Download PDFInfo
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- CN215355982U CN215355982U CN202121917180.1U CN202121917180U CN215355982U CN 215355982 U CN215355982 U CN 215355982U CN 202121917180 U CN202121917180 U CN 202121917180U CN 215355982 U CN215355982 U CN 215355982U
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Abstract
The utility model provides a cold-heading mould for environmental protection preparation bolt, is including can upsetting out the first forming die of processing head at bolt idiosome top, can be upsetting out the second forming die of calotte on the processing head, can be at the third forming die of the overhead preparation hexagonal face of processing, can the hexagonal face of smart heading and the fourth forming die of preparation processing head flange and can be upsetting out the fifth forming die who satisfies the body of rod of settlement diameter requirement bottom the bolt idiosome. The utility model has the advantages that: the forming processing of the bolt blank is realized through the sequential processing of five forming parts, thereby being capable of processing 40Cr10Si2Preparing a bolt blank of Mo materialThe bolt wire blank which meets the molding requirement has good molding effect and high yield, and is suitable for mass production of 40Cr10Si2And (5) forming and processing the Mo material bolt blank.
Description
Technical Field
The utility model relates to the technical field of bolt manufacturing, in particular to a cold heading die for manufacturing a bolt in an environment-friendly way.
Background
The existing Chinese patent application with the application number of CN201810975452.X named as bolt large-chamfer cold-heading die and process discloses a bolt large-chamfer cold-heading die and process, which comprises a main die A and a main die B, wherein the working procedure of the main die A is before the main die B, through holes are respectively arranged in the middle parts of the main die A and the main die B, and each through hole comprises a forming cavity positioned on the front side and an ejector rod accommodating cavity positioned on the rear side; a first chamfer part is arranged between the forming cavity of the main mold A and the mandril accommodating cavity, and a second chamfer part is arranged between the forming cavity of the main mold B and the mandril accommodating cavity; the inner diameter of the die at the tail end of the second chamfering part is not less than 50% of the nominal diameter of the bolt, and the inner diameter of the die at the tail end of the first chamfering part is 40% -50% of the sum of the inner diameter of the tail end of the second chamfering part and the nominal diameter of the bolt. According to the utility model, the large chamfer structure is realized through the two-section chamfer, so that the turning process can be omitted, the length of the bolt rod part is prevented from changing, the damage of a mold is avoided, and the time and the production cost are saved. However, the cold heading die is applied to the material of 40Cr10Si2In the process of machining Mo bolts, 40Cr is used10Si2The Mo material is hard, the cold heading die is difficult to meet the requirement of bolt molding, and the yield is low, so the structure of the cold heading die needs to be further improved.
Disclosure of Invention
The technical problem to be solved by the utility model is to provide a method for processing 40Cr10Si2The Mo material bolt has the advantages of required modeling, good molding effect and high yield, and is used for manufacturing the cold heading die of the bolt in an environment-friendly way.
The technical scheme adopted by the utility model for solving the technical problems is as follows: this a cold-heading mould for environmental protection preparation bolt, its characterized in that: the machining head comprises a first forming die capable of upsetting out a machining head at the top of a bolt blank body, a second forming die capable of upsetting out a round top on the machining head, a third forming die capable of manufacturing a hexagonal surface on the machining head, a fourth forming die capable of finely upsetting the hexagonal surface of the machining head and manufacturing a flange of the machining head, and a fifth forming die capable of upsetting out a rod body meeting the requirement of a set diameter at the bottom of the bolt blank body.
As an improvement, the first forming die comprises a first upper die and a first lower die, the first upper die is connected with the first upper die driving mechanism and can move up and down relative to the first lower die, a pressing rod is arranged at the bottom of the first upper die, the bottom end of the pressing rod extends out of the bottom surface of the first upper die, a first forming cavity capable of accommodating the bolt blank body is arranged at the top of the first lower die, the first forming cavity comprises a first upper cavity capable of forming the processing head and a first lower cavity capable of forming a rod body at the bottom of the bolt, the diameter of the first upper cavity is larger than that of the first lower cavity, and a chamfer capable of withdrawing the bolt blank body is arranged at the joint of the first upper cavity and the first lower cavity.
As the improvement, the second forming die includes mould and second lower mould on the second, mould actuating mechanism is connected and can reciprocate relatively the second lower mould on the second is gone up with the second, the bottom of going up the mould on the second is provided with the concave part that can process out the calotte at the processing head top, the top of second lower mould is provided with the second forming die cavity that can hold the bolt idiosome, cavity and the second lower cavity that can form the bolt lower part body of rod under the second forming die cavity includes the second that can form the bottom cambered surface of processing head, the diameter of cavity is greater than the diameter of cavity under the second on the second.
The improved structure is characterized in that a forming piece is arranged in the cavity under the second, the top surface of the forming piece is an annular arc surface which can be matched with the bottom arc surface of the machining head, a limiting sleeve is covered at the top of the forming piece, and the machining head can be detachably sleeved in a through hole in the middle of the limiting sleeve.
As an improvement, the third forming die comprises a third upper die and a third lower die, the third upper die is connected with the third upper die driving mechanism and can move up and down relative to the third lower die, a hexagonal forming concave part capable of being machined on the side part of the machining head is arranged at the bottom of the third upper die, and a third forming cavity capable of accommodating a lower rod body of the bolt blank is arranged at the top of the third lower die.
In a further improvement, a limit sleeve ring is sleeved in the forming concave part, and when the third upper die is matched with the third lower die, the processing head is positioned in an inner cavity in the middle of the limit sleeve ring.
As an improvement, the fourth forming die comprises a fourth upper die and a fourth lower die, the fourth upper die is connected with the fourth upper die driving mechanism and can move up and down relative to the fourth lower die, the bottom of the fourth upper die is provided with a fourth upper die cavity which can precisely upset the side part of the processing head for processing the hexagon to meet the hexagonal size requirement, and the top of the fourth lower die is provided with a fourth forming cavity which can accommodate the lower rod body of the bolt blank.
In a further improvement, molding lantern rings are arranged around the fourth upper die cavity and the fourth forming cavity, and when the fourth upper die and the fourth lower die are combined, a molding gap for molding the processing head flange is reserved between the bottom surface of the fourth upper die and the top surface of the fourth lower die.
The improved structure is characterized in that buffer sleeves are arranged in the fourth upper die cavity and the fourth forming die cavity, the upper forming lantern ring is sleeved in the inner cavity of the upper buffer sleeve, and the lower forming lantern ring is sleeved in the inner cavity of the lower buffer sleeve.
As an improvement, the fifth forming die comprises a fifth upper die and a fifth lower die, the fifth upper die is connected with the fifth upper die driving mechanism and can move up and down relative to the fifth lower die, an upper die concave part capable of accommodating the processing head is arranged at the bottom of the fifth upper die, a fifth forming cavity capable of accommodating the bolt rod body is arranged at the top of the fifth lower die, the fifth forming cavity comprises a fifth upper cavity capable of forming the bolt upper rod body and a fifth lower cavity capable of forming the bolt lower rod body, the diameter of the fifth upper cavity is larger than that of the fifth lower cavity, and a chamfer for withdrawing the bolt is arranged at the joint of the fifth upper cavity and the fifth lower cavity.
Compared with the prior art, the utility model has the advantages that: the cold heading die comprises a first forming die, a second forming die, a third forming die, a fourth forming die and a fifth forming die, and the forming processing of the bolt blank is realized through the sequential processing of five forming parts, so that 40Cr can be processed10Si2The bolt blank body made of the Mo material can be used for preparing a bolt wire blank meeting the molding requirement, has good molding effect and high yield, and is suitable for moldingBatched 40Cr10Si2And (5) forming and processing the Mo material bolt blank.
Drawings
Fig. 1 is a schematic structural view of a first molding die in an embodiment of the present invention;
fig. 2 is a schematic structural view of a second molding die in the embodiment of the present invention;
fig. 3 is a schematic structural view of a third forming die in the embodiment of the present invention;
fig. 4 is a schematic structural view of a fourth forming die in the embodiment of the utility model;
fig. 5 is a schematic structural view of a fifth forming die in the embodiment of the utility model;
FIG. 6 is a schematic structural view of the processed bolt blank of FIG. 1;
FIG. 7 is a schematic view of the bolt blank of FIG. 2 after further processing;
FIG. 8 is a schematic structural view of the bolt blank of FIG. 3 after further processing;
FIG. 9 is a schematic view of the bolt blank of FIG. 4 after further processing;
fig. 10 is a schematic structural view of the bolt blank further processed in fig. 5.
Detailed Description
The utility model is described in further detail below with reference to the accompanying examples.
As shown in fig. 1 to 10, the cold heading die for environmentally friendly bolt production of the present embodiment includes a first forming die 1 capable of heading a processing head 61 at the top of a bolt blank 6, a second forming die 2 capable of heading a dome at the processing head 61, a third forming die 3 capable of heading a hexagonal surface at the processing head 61, a fourth forming die 4 capable of precisely heading the hexagonal surface at the processing head 61 and producing a processing head flange 62, and a fifth forming die 5 capable of heading a rod body 63 satisfying a set diameter requirement at the bottom of the bolt blank 6.
The first forming die 1 comprises a first upper die 11 and a first lower die 12, the first upper die 11 is connected with a first upper die driving mechanism and can move up and down relative to the first lower die 12, a pressing rod 13 is arranged at the bottom of the first upper die 11, the bottom end of the pressing rod 13 extends out of the bottom surface of the first upper die 11, a first forming cavity capable of containing the bolt blank 6 is arranged at the top of the first lower die 12, the first forming cavity comprises a first upper cavity 14 capable of forming a processing head 61 and a first lower cavity 15 capable of forming a rod body at the bottom of the bolt, the diameter of the first upper cavity 14 is larger than that of the first lower cavity 15, and a chamfer capable of withdrawing the bolt blank 6 is arranged at the joint of the first upper cavity 14 and the first lower cavity 15.
The second forming die 2 comprises a second upper die 21 and a second lower die 22, the second upper die 21 is connected with a second upper die driving mechanism and can move up and down relative to the second lower die 22, a concave part 23 capable of forming a dome on the top of the processing head 61 is arranged at the bottom of the second upper die 21, a second forming cavity capable of containing the bolt blank 6 is arranged at the top of the second lower die 22, the second forming cavity comprises a second upper cavity 24 capable of forming a bottom cambered surface of the processing head 61 and a second lower cavity 25 capable of forming a lower rod body of the bolt, and the diameter of the second upper cavity 24 is larger than that of the second lower cavity 25. A forming part 26 is arranged in the second lower cavity 25, the top surface of the forming part 26 is an annular arc surface which can be matched with the bottom arc surface of the processing head 61, a limiting sleeve 27 is covered on the top of the forming part 26, and the processing head 61 can be detachably sleeved in a middle through hole of the limiting sleeve 27.
The third forming die 3 includes a third upper die 31 and a third lower die 32, the third upper die 31 is connected to a third upper die driving mechanism and can move up and down relative to the third lower die 32, a hexagonal forming recess 33 is formed in the bottom of the third upper die 31 at the side of the processing head 61, and a third forming cavity 34 capable of accommodating the lower rod of the bolt blank 6 is formed in the top of the third lower die 32. A stop collar 35 is fitted into the forming recess 33, and when the third upper die 31 is mated with the third lower die 32, the processing head 61 is located in a central inner cavity of the stop collar 35.
The fourth forming die 4 includes a fourth upper die 41 and a fourth lower die 42, the fourth upper die 41 is connected to a fourth upper die driving mechanism and can move up and down relative to the fourth lower die 42, a fourth upper die cavity 43 is disposed at the bottom of the fourth upper die 41, the fourth upper die cavity can be used for precisely upsetting the side of the processing head 61 to form a hexagonal shape, so that the hexagonal shape of the processing head 61 meets the hexagonal size requirement, and a fourth forming cavity 44 is disposed at the top of the fourth lower die 42, and the fourth forming cavity can accommodate the lower rod body of the bolt blank 6. A molding collar 45 surrounds the fourth upper cavity 43 and the fourth molding cavity 44, and when the fourth upper mold 41 and the fourth lower mold 42 are mated, a molding gap for molding the processing head flange 62 is left between the bottom surface of the fourth upper mold 41 and the top surface of the fourth lower mold 42. A buffer sleeve 46 is arranged in each of the fourth upper die cavity 43 and the fourth forming cavity 44, an upper forming collar is sleeved in an inner cavity of the upper buffer sleeve, and a lower forming collar is sleeved in an inner cavity of the lower buffer sleeve.
The fifth forming die 5 comprises a fifth upper die 51 and a fifth lower die 52, the fifth upper die 51 is connected with a fifth upper die driving mechanism and can move up and down relative to the fifth lower die 52, an upper die concave part 53 capable of accommodating the processing head 61 is arranged at the bottom of the fifth upper die 51, a fifth forming cavity capable of accommodating a bolt rod body is arranged at the top of the fifth lower die 52, the fifth forming cavity comprises a fifth upper cavity 54 capable of forming an upper bolt rod body and a fifth lower cavity 55 capable of forming a lower bolt rod body, the diameter of the fifth upper cavity 54 is larger than that of the fifth lower cavity 55, and a chamfer for withdrawing the bolt is arranged at the joint of the fifth upper cavity 54 and the fifth lower cavity 55.
The cold heading die is used for processing the bolt blank body prepared by the environment-friendly method, and the method does not need to adopt high temperature, effectively reduces energy consumption and realizes cold heading processing of the bolt blank body. The environment-friendly method specifically comprises the following steps: the method comprises the following steps:
firstly, 40Cr to be used as a molding raw material10Si2Feeding the Mo wire into a well type furnace, heating the temperature in the well type furnace to 760 ℃ within 3 hours, and preserving the temperature for 6 hours;
secondly, cooling the temperature in the furnace to 500 ℃ and preserving the temperature for 2 hours to refine the carbide of the wire rod into a ball shape;
thirdly, raising the temperature in the furnace to 720 ℃ again and preserving the temperature for 6 hours, wherein the time for raising the temperature in the furnace from 500 ℃ to 720 ℃ is 2 hours;
taking the insulated wire rod out of the well type furnace immediately to air for cooling, thereby eliminating tertiary cementite generated at the grain boundary of the wire rod in the step two;
fifthly, straightening the cooled wire rod and polishing the surface of the wire rod so as to remove the oxide skin of the wire rod;
sixthly, removing oxide skin dust on the surface of the polished wire rod;
seventhly, carrying out electrolytic phosphating on the treated wire in an electrolytic phosphating tank to enable the surface of the wire to generate a phosphating film with the thickness of 10-30 microns;
the treated wires are subjected to triterpenization treatment in the saponification tank, the phosphating film surfaces of the wires are covered with a layer of triterpenization powder, and the thickness of the triterpenization powder layer is 5-10 mu m;
ninth, drying the treated wire;
ten, the dried wire rod enters a wire drawing machine for wire drawing to prepare a bolt blank wire rod with a set diameter;
and eleventh, cutting the bolt blank wire to obtain the bolt blank.
In the fifth step, the surface polishing is carried out by,
A. sending the straightened wire rod into a first sand polishing machine for rough polishing, and removing an oxide skin of annealing of the wire rod;
B. and sending the wire rod coming out of the first polishing machine into a second polishing machine for fine polishing to remove the oxide skin remained on the surface of the wire rod.
And in the fifth step, the wire is straightened by the straightening machine.
And step six, specifically removing the oxide skin dust on the polished surface of the wire rod, namely feeding the wire rod into an ultrasonic cleaning tank for ultrasonic cleaning, and removing the oxide skin dust remained on the surface of the wire rod after fine polishing. And step nine, drying the wire by a dryer.
Claims (10)
1. The utility model provides a cold-heading mould for environmental protection preparation bolt which characterized in that: the machining device comprises a first forming die (1) capable of upsetting out a machining head (61) from the top of a bolt blank (6), a second forming die (2) capable of upsetting out a dome on the machining head (61), a third forming die (3) capable of manufacturing a hexagonal surface on the machining head (61), a fourth forming die (4) capable of precisely upsetting the hexagonal surface of the machining head (61) and manufacturing a machining head flange (62), and a fifth forming die (5) capable of upsetting out a rod body (63) meeting the requirement of a set diameter from the bottom of the bolt blank (6).
2. The cold-heading die of claim 1, wherein: the first forming die (1) comprises a first upper die (11) and a first lower die (12), the first upper die (11) is connected with a first upper die driving mechanism and can move up and down relative to the first lower die (12), a pressing rod (13) is arranged at the bottom of the first upper die (11), the bottom end of the pressing rod (13) extends out of the bottom surface of the first upper die (11), a first forming cavity capable of accommodating a bolt blank (6) is arranged at the top of the first lower die (12), the first forming cavity comprises a first upper cavity (14) capable of forming a processing head (61) and a first lower cavity (15) capable of forming a bolt bottom rod body, the diameter of the first upper cavity (14) is larger than that of the first lower cavity (15), and a chamfer for withdrawing the bolt blank (6) is arranged at the joint of the first upper cavity (14) and the first lower cavity (15).
3. The cold-heading die of claim 2, wherein: second forming die (2) are gone up mould (21) and second lower mould (22) including the second, go up mould (21) and be connected and can reciprocate relatively second lower mould (22) with second mould actuating mechanism on the second, the bottom of going up mould (21) on the second is provided with concave part (23) that can process out the calotte at processing head (61) top, the top of second lower mould (22) is provided with the second die cavity that can hold bolt idiosome (6), cavity (25) under cavity (24) and the second that can form the bolt lower part body of rod are gone up to the second of the bottom cambered surface that can form processing head (61) in the second die cavity, the diameter of cavity (24) is greater than the diameter of cavity (25) under the second on the second.
4. The cold-heading die of claim 3, wherein: and a forming part (26) is arranged in the second lower cavity (25), the top surface of the forming part (26) is an annular arc surface which can be matched with the bottom arc surface of the machining head (61), a limiting sleeve (27) is covered at the top of the forming part (26), and the machining head (61) can be detachably sleeved in a middle through hole of the limiting sleeve (27).
5. The cold-heading die of claim 1, wherein: the third forming die (3) comprises a third upper die (31) and a third lower die (32), the third upper die (31) is connected with a third upper die driving mechanism and can move up and down relative to the third lower die (32), a hexagonal forming concave part (33) can be machined on the side part of the machining head (61) is arranged at the bottom of the third upper die (31), and a third forming cavity (34) capable of accommodating a lower rod body of the bolt blank (6) is arranged at the top of the third lower die (32).
6. The cold-heading die of claim 5, wherein: and a limiting sleeve ring (35) is sleeved in the forming concave part (33), and when the third upper die (31) is matched with the third lower die (32), the processing head (61) is positioned in a middle inner cavity of the limiting sleeve ring (35).
7. The cold-heading die of claim 1, wherein: fourth forming die (4) are including fourth mould (41) and fourth lower mould (42), mould (41) are gone up with the fourth mould actuating mechanism and are connected and fourth lower mould (42) relatively reciprocate in the fourth, the bottom of going up mould (41) is provided with and makes processing head (61) hexagonal satisfy die cavity (43) on the fourth of hexagonal dimensional requirement by processing head (61) lateral part that can the fine upsetting processed out the hexagonal in the fourth, the top of fourth lower mould (42) is provided with fourth forming die cavity (44) that can hold the lower part body of rod of bolt idiosome (6).
8. The cold-heading die of claim 7, wherein: and molding collars (45) are arranged around the fourth upper die cavity (43) and the fourth molding cavity (44), and when the fourth upper die (41) and the fourth lower die (42) are matched, a molding gap for molding the processing head flange (62) is reserved between the bottom surface of the fourth upper die (41) and the top surface of the fourth lower die (42).
9. The cold-heading die of claim 8, wherein: and buffer sleeves (46) are arranged in the fourth upper die cavity (43) and the fourth forming cavity (44), the upper forming lantern ring is sleeved in the inner cavity of the upper buffer sleeve, and the lower forming lantern ring is sleeved in the inner cavity of the lower buffer sleeve.
10. The cold-heading die of claim 1, wherein: fifth forming die (5) includes fifth mould (51) and fifth lower mould (52), fifth mould (51) are connected with fifth mould actuating mechanism and can reciprocate relatively fifth lower mould (52), the bottom of fifth mould (51) is provided with last mould concave part (53) that can hold processing head (61), the top of fifth lower mould (52) is provided with the fifth die cavity that can hold the bolt body of rod, the fifth die cavity is including cavity (54) under fifth upper chamber body (54) that can form the bolt upper portion body of rod and the fifth cavity (55) that can form the bolt lower part body of rod, the diameter of cavity (54) is greater than the diameter of cavity (55) under the fifth, the junction of cavity (54) is provided with the chamfer of withdrawing from the bolt under fifth upper chamber body (54) and the fifth cavity (55).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121917180.1U CN215355982U (en) | 2021-08-16 | 2021-08-16 | Cold heading die for environment-friendly bolt manufacturing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121917180.1U CN215355982U (en) | 2021-08-16 | 2021-08-16 | Cold heading die for environment-friendly bolt manufacturing |
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| Publication Number | Publication Date |
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| CN215355982U true CN215355982U (en) | 2021-12-31 |
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| CN202121917180.1U Active CN215355982U (en) | 2021-08-16 | 2021-08-16 | Cold heading die for environment-friendly bolt manufacturing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114367618A (en) * | 2022-01-12 | 2022-04-19 | 宾科汽车紧固件（昆山）有限公司 | Step hexagonal flange screw forming process and device and step hexagonal flange screw |
-
2021
- 2021-08-16 CN CN202121917180.1U patent/CN215355982U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114367618A (en) * | 2022-01-12 | 2022-04-19 | 宾科汽车紧固件（昆山）有限公司 | Step hexagonal flange screw forming process and device and step hexagonal flange screw |
| CN114367618B (en) * | 2022-01-12 | 2024-01-30 | 宾科汽车紧固件（昆山）有限公司 | Step hexagonal flange screw forming process, device and step hexagonal flange screw |
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