CN114192731B - Method for producing carriage bolt, carriage bolt and alloy sheet - Google Patents
Method for producing carriage bolt, carriage bolt and alloy sheet Download PDFInfo
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- CN114192731B CN114192731B CN202111347089.5A CN202111347089A CN114192731B CN 114192731 B CN114192731 B CN 114192731B CN 202111347089 A CN202111347089 A CN 202111347089A CN 114192731 B CN114192731 B CN 114192731B
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 35
- 239000000956 alloy Substances 0.000 title claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 230000007704 transition Effects 0.000 claims description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052721 tungsten Inorganic materials 0.000 claims description 4
- 239000010937 tungsten Substances 0.000 claims description 4
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 4
- 239000000047 product Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 239000012467 final product Substances 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 201000009240 nasopharyngitis Diseases 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- B21K1/44—Making machine elements bolts, studs, or the like
- B21K1/46—Making machine elements bolts, studs, or the like with heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
- F16B35/041—Specially-shaped shafts
- F16B35/048—Specially-shaped necks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
- F16B41/005—Measures against unauthorised operation of bolts, nuts or pins
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The application relates to a carriage bolt production method, a carriage bolt and an alloy sheet, wherein a bolt blank is provided, the carriage bolt blank comprises a first section, a second section and a third section which are sequentially connected, the first section is a cone, the second section and the third section of the carriage bolt are cylinders, the diameter of the cylinder of the second section is larger than that of the cylinder of the third section, the carriage bolt blank is upset to enable the second section to be contracted into a cube, the carriage bolt blank is upset to enable the cone of the first section of the carriage bolt blank to be hemispherical, the height of the cube of the second section is reduced, the cross section area is enlarged, and finally the carriage bolt blank is upset to enable the hemispherical size of the first section to reach a preset size, and the size of the cube of the second section to reach the preset size. The design of this step has dispersed the atress of alloy lower mould greatly, has improved the mould life-span greatly.
Description
Technical Field
The application relates to the field of safety equipment, in particular to a carriage bolt production method, a carriage bolt and an alloy sheet.
Background
The carriage bolts are divided into large half-head carriage bolts (corresponding to the standards GB/T14 and DIN 603) and small half-head carriage bolts (corresponding to the standards GB/T12-85) according to the head sizes. The carriage bolt is a fastener consisting of a head part and a screw rod (a cylinder with external threads), and is matched with a nut for fastening two parts with through holes. Typically, bolts are used to connect two objects, typically through an unthreaded hole, and are used in conjunction with a nut (nut), the single piece being unattached. The carriage bolt is applied to the inslot, and the square neck card is in the inslot at the in-process of installation, can play and prevent that the bolt from rotating, and the carriage bolt can be at the parallel movement in the inslot. Because the heads of the carriage bolts are round, no cross grooves or internal hexagonal or other power-assisting tools are designed, and the anti-theft function can be realized in the actual connection process. The carriage bolt has wide application, but the bolt head is semicircular, the lower part is square, and the production difficulty is high. When a common cold header is used for production, a lower die for producing tens of thousands of products of four-sequence alloy is damaged, the damage to the die results in that carriage bolt products become waste products, and if the operation is found out untimely, the products possibly flow into a client hand to cause claim or recovery. Therefore, the improvement of the cold heading production process of the carriage bolt improves the service life of the cold heading die of the carriage bolt, and the guarantee of the product quality is a technical target of carriage bolt production and is a difficult problem which is difficult to overcome by a plurality of factories.
Disclosure of Invention
In view of the above, a method for producing a carriage bolt, and an alloy sheet are provided.
A method for producing a carriage bolt, comprising:
S10, providing a bolt blank, wherein the carriage bolt blank comprises a first section, a second section and a third section which are sequentially connected, the first section is a cone, the second section and the third section of the carriage bolt are cylinders, and the diameter of the cylinder of the second section is larger than that of the cylinder of the third section;
s20, upsetting the carriage bolt blank to enable the second section to be contracted into a cube;
S30, upsetting the carriage bolt blank to enable the cone of the first section of the carriage bolt blank to be hemispherical, wherein the height of the cube of the second section is reduced, and the cross section area is increased;
And S40, upsetting the carriage bolt blank to enable the hemispherical size of the first section to reach a preset size and enable the cubic size of the second section to reach the preset size.
In one embodiment, the upsetting the carriage bolt blank to shrink the second section into a cube S20 further comprises:
So that the taper of the first section of the carriage bolt blank is shorter.
In one embodiment, the upsetting the carriage bolt blank in S30 changes a cone of the first section of the carriage bolt blank into a hemispherical shape, and the decreasing the height of the cube of the second section and the increasing the cross-sectional area further includes:
the cross-sectional area of the transition portion between the first section and the second section becomes larger and the height becomes smaller.
In one embodiment, the step S10 provides a bolt blank, where the bolt blank includes a first section, a second section and a third section that are sequentially connected, the first section is a cone, the second section and the third section of the carriage bolt are cylinders, and the diameter of the cylinder of the second section is larger than that of the cylinder of the third section, and the diameter of the cylinder of the second section is consistent with the diagonal dimension of the tetragonal die that makes the second section shrink into a cube in the step S20.
In one embodiment, the top of the cone of the first section of the carriage bolt blank is planar.
In one embodiment, in S30, the carriage bolt blank is upset by using an alloy sheet, the alloy sheet includes a first ring and a second ring, the second ring is nested in the first ring, an inner cavity of the second ring includes a circular cavity and a cubic cavity, the circular cavity is used for making a cone of the first section become hemispherical, and the cubic cavity is used for making a height of a cube of the second section become smaller and a cross-sectional area becomes larger.
The alloy sheet is applied to S30 of the carriage bolt production method, upsetting is carried out on the carriage bolt blank, so that the cone of the first section of the carriage bolt blank is changed into a hemispherical shape, the height of the cube of the second section is reduced, the cross-sectional area is increased, the alloy sheet comprises a first circular ring and a second circular ring, the second circular ring is nested in the first circular ring, the inner cavity of the second circular ring comprises a circular cavity and a cube cavity, the circular cavity is used for enabling the cone of the first section to be changed into a hemispherical shape, and the cube cavity is used for enabling the height of the cube of the second section to be reduced and the cross-sectional area to be increased.
In one embodiment, the material of the first ring is SKD61.
In one embodiment, the material of the second ring is tungsten steel alloy.
A carriage bolt is manufactured by adopting the carriage bolt production method.
According to the method for producing the carriage bolt, firstly, a bolt blank is provided, the carriage bolt blank comprises a first section, a second section and a third section which are sequentially connected, the first section is a cone, the second section and the third section of the carriage bolt are cylinders, the diameter of the cylinder of the second section is larger than that of the cylinder of the third section, upsetting is conducted on the carriage bolt blank to enable the second section to be contracted into a cube, upsetting is conducted on the carriage bolt blank to enable the cone of the first section of the carriage bolt blank to be hemispherical, the height of the cube of the second section to be reduced, the cross section area of the carriage bolt blank to be enlarged, upsetting is conducted on the carriage bolt blank to enable the hemispherical size of the first section to reach a preset size, and the size of the cube of the second section to reach the preset size. The method comprises the steps of upsetting a carriage bolt blank, enabling a cone of a first section of the carriage bolt blank to be hemispherical, enabling the height of a cube of a second section to be small, enabling the bolt blank to be close to a final product in the step of enlarging the cross section, and greatly dispersing upsetting the carriage bolt blank through the design of the step, enabling the hemispherical size of the first section to reach a preset size, enabling the size of the cube of the second section to reach the preset size, enabling the stress of an alloy lower die to be greatly improved when the bolt blank is deformed, and enabling the service life of the die to be greatly prolonged.
Drawings
FIG. 1 is a step diagram of a method for producing a carriage bolt according to an embodiment of the present application;
FIG. 2 is a perspective view of a carriage latch according to one embodiment of the present application;
FIG. 3 is a schematic view of an alloy sheet according to one embodiment of the present application;
FIG. 4 is a diagram showing steps for fabricating an alloy sheet according to one embodiment of the present application;
FIG. 5 is a diagram of steps for fabricating an alloy sheet according to one embodiment of the present application;
FIG. 6 is a diagram of steps for fabricating an alloy sheet according to one embodiment of the present application;
FIG. 7 is a diagram of steps for fabricating an alloy sheet according to one embodiment of the present application;
FIG. 8 is a diagram of steps for fabricating an alloy sheet according to one embodiment of the present application;
FIG. 9 is a diagram of steps for fabricating an alloy sheet according to one embodiment of the present application.
Reference numerals illustrate:
First segment 10
Second section 20
Third section 30
First circular ring 110
Second circular ring 120
Circular cavity 112
Cube cavities 114
A petal-shaped structure 111.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are intended to illustrate the application and are not to be construed as limiting the application.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.
In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Referring to fig. 1-2, an embodiment of the present application provides a method for producing a carriage bolt, which includes:
S10, a bolt blank body comprises a first section, a second section and a third section which are sequentially connected, wherein the first section is a cone, the second section and the third section of the carriage bolt are cylinders, and the diameter of the cylinder of the second section is larger than that of the cylinder of the third section;
s20, upsetting the carriage bolt blank to enable the second section to be contracted into a cube;
S30, upsetting the carriage bolt blank to enable the cone of the first section of the carriage bolt blank to be hemispherical, wherein the height of the cube of the second section is reduced, and the cross section area is increased;
And S40, upsetting the carriage bolt blank to enable the hemispherical size of the first section to reach a preset size and enable the cubic size of the second section to reach the preset size.
The bolt blank provided in S10 may also be formed by upsetting. The first section, the second section and the third section may be integrally formed. The diameter of the cylinder of the second section is larger than the diameter of the cylinder of the third section. The second section is used to form a cube.
In S20, the wiping is performed in a step of shrinking the square, that is, shrinking the second segment from the cylinder into a cube.
In S30, the cone of the first segment is mainly upset into a hemisphere by the hemispherical upper punch die, the height of the cube of the second segment becomes smaller, and the cross-sectional area becomes larger, so that the shapes of the first segment and the second segment have formed the approximate outline of the final product.
In S40, the bolt blank in S30 is further forged, so that the hemispherical size of the first section reaches a preset size, and the cubic size of the second section reaches a preset size, that is, the hemispherical upsetting is performed to form a semicircle with a final size requirement. The cubes are upset into a square of the final dimensional requirement.
According to the method for producing the carriage bolt, firstly, a bolt blank is provided, the carriage bolt blank comprises a first section, a second section and a third section which are sequentially connected, the first section is a cone, the second section and the third section of the carriage bolt are cylinders, the diameter of the cylinder of the second section is larger than that of the cylinder of the third section, upsetting is conducted on the carriage bolt blank to enable the second section to be contracted into a cube, upsetting is conducted on the carriage bolt blank to enable the cone of the first section of the carriage bolt blank to be hemispherical, the height of the cube of the second section to be reduced, the cross section area of the carriage bolt blank to be enlarged, upsetting is conducted on the carriage bolt blank to enable the hemispherical size of the first section to reach a preset size, and the size of the cube of the second section to reach the preset size. The method comprises the steps of upsetting a carriage bolt blank, enabling a cone of a first section of the carriage bolt blank to be hemispherical, enabling the height of a cube of a second section to be small, enabling the bolt blank to be close to a final product in the step of enlarging the cross section, and greatly dispersing upsetting the carriage bolt blank through the design of the step, enabling the hemispherical size of the first section to reach a preset size, enabling the size of the cube of the second section to reach the preset size, enabling the stress of an alloy lower die to be greatly improved when the bolt blank is deformed, and enabling the service life of the die to be greatly prolonged.
That is, in the step of upsetting the carriage bolt blank so that the taper of the first section of the carriage bolt blank becomes hemispherical and the cube of the second section becomes smaller in height and larger in cross-sectional area, the first section is already hemispherical and has a larger thickness and a shape similar to that of the final carriage bolt product, upsetting the carriage bolt blank is shared so that the hemispherical size of the first section reaches a preset size and the lower die is stressed in the step of the cube of the second section reaching the preset size, so that the alloy lower die is not easily broken in the final step. By adopting the design, the stress of the mould which is frequently damaged in the past is greatly dispersed, the service life of the mould is greatly prolonged, and the product quality is ensured. The mold is improved to 500 ten thousand from the original mold which is damaged by hundreds of thousands, and the service life of the mold and the yield of products are greatly improved.
In one embodiment, the step S20 further comprises making the taper of the first section of the carriage bolt blank shorter. That is, in the step of upsetting the carriage bolt blank to retract the second section into a cube, the taper of the first section of the carriage bolt blank also changes at the same time in preparation for forming a hemispherical shape.
In one embodiment, the step S30 further includes:
the cross-sectional area of the transition portion between the first section and the second section becomes larger and the height becomes smaller.
That is, in the step of upsetting the carriage bolt blank so that the taper of the first section of the carriage bolt blank becomes hemispherical, the height of the cube of the second section becomes smaller, and the cross-sectional area becomes larger, the excessive portion between the first section and the second section becomes larger in cross-sectional area and becomes smaller in height, so that forging in the final step is facilitated.
In one embodiment, the diameter of the cylinder of the second segment in S10 corresponds to the diagonal dimension of the tetragonal mode in S20 that narrows the second segment to a cube. It is thus facilitated to shrink the second segment into a cube in S20.
In one embodiment, the top of the cone of the first section of the carriage bolt blank is planar to facilitate forging.
In one embodiment, in S30, the carriage bolt blank is upset by using an alloy sheet, the alloy sheet includes a first ring and a second ring, the second ring is nested in the first ring, an inner cavity of the second ring includes a circular cavity and a cubic cavity, the circular cavity is used for making a cone of the first section become hemispherical, and the cubic cavity is used for making a height of a cube of the second section become smaller and a cross-sectional area becomes larger.
Referring to fig. 3, the embodiment of the application further provides an alloy sheet, which is applied to step S30 of the method for producing a carriage bolt, wherein the alloy sheet comprises a first circular ring and a second circular ring, the second circular ring is nested in the first circular ring, an inner cavity of the second circular ring comprises a circular cavity and a cubic cavity, the circular cavity is used for enabling a cone of the first section to be hemispherical, and the cubic cavity is used for enabling a height of a cube of the second section to be small and a cross-sectional area to be large. That is, the alloy sheet may be formed as part of an abrasive article such that the first section forms all or a portion of the hemispherical shape, while also allowing the second section to form a cube.
In one embodiment, the material of the first ring is SKD61.
In one embodiment, the material of the second ring is tungsten steel alloy.
In one embodiment, the method for manufacturing the alloy sheet comprises the following steps:
cutting the tungsten steel material into four petal-shaped structures by using a slow wire, wherein one petal-shaped structure is shown in fig. 4;
Fixing the four petal-shaped structures through a tool to form a second circular ring 120, as shown in fig. 5;
Placing the cylindrical structure on a grinding machine for processing to reach the surface roughness Ra0.2;
forming the first ring 110 by using SDK61 material, as shown in fig. 6;
performing inner hole grinding on the inner ring of the first circular ring, and then embedding the second circular ring into the first circular ring through a primary power machine, so that the second circular ring and the first circular ring are in interference fit, as shown in FIG. 7;
cutting the cylinder formed by the first circular ring and the second circular ring according to the requirement to obtain the size of the target, as shown in fig. 8;
finally, the two ends of the cylinder are polished, horn mouth is turned, and inner holes are polished by hand grinding, so that the alloy sheet is formed, as shown in fig. 9.
During upsetting, the alloy sheet bears the small volumes of the square neck and the round head under the bolt head of the carriage, so that the S30 shape is the reduced version S40 of the final product, stress is greatly reduced during upsetting, and meanwhile, due to natural transition, the square neck under the bolt head of the carriage cannot be folded. The embodiment of the application also provides a carriage bolt. The carriage bolt is manufactured by adopting the carriage bolt production method described in the embodiment.
The foregoing is merely a preferred embodiment of the application, and it should be noted that modifications could be made by those skilled in the art without departing from the principles of the application, which modifications would also be considered to be within the scope of the application.
Claims (10)
1. A method of manufacturing a carriage bolt, comprising:
S10, providing a carriage bolt blank, wherein the carriage bolt blank comprises a first section, a second section and a third section which are sequentially connected, the first section is a cone, the second section and the third section of the carriage bolt are cylinders, and the diameter of the cylinder of the second section is larger than that of the cylinder of the third section;
s20, upsetting the carriage bolt blank to enable the second section to be contracted into a cube;
S30, upsetting the carriage bolt blank to enable the cone of the first section of the carriage bolt blank to be hemispherical, wherein the height of the cube of the second section is reduced, and the cross section area is increased;
And S40, upsetting the carriage bolt blank to enable the hemispherical size of the first section to reach a preset size and enable the cubic size of the second section to reach the preset size.
2. The method of producing a carriage bolt of claim 1, wherein said upsetting said carriage bolt blank to form said second section into a cube, S20, further comprises:
So that the taper of the first section of the carriage bolt blank is shorter.
3. The method for producing a carriage bolt according to claim 2, wherein said upsetting the carriage bolt body at S30 to change the taper of the first section of the carriage bolt body into a hemispherical shape, and said decreasing the height of the cube of the second section and increasing the cross-sectional area further comprises:
the cross-sectional area of the transition portion between the first section and the second section becomes larger and the height becomes smaller.
4. A method of producing a carriage bolt according to claim 3, wherein S10 is provided a bolt blank comprising a first section, a second section and a third section connected in sequence, the first section being a cone, the second section and the third section of the carriage bolt being cylinders, the diameter of the cylinder of the second section being greater than the diameter of the cylinder of the third section, the diameter of the cylinder of the second section being in accordance with the diagonal dimension of the tetragonal die in S20 which causes the second section to shrink into a cube.
5. The method of producing a carriage bolt of claim 4 wherein the top of the cone of the first section of the carriage bolt blank is planar.
6. The method for producing a carriage bolt according to claim 5, wherein in S30, the carriage bolt blank is upset by using an alloy sheet, the alloy sheet comprises a first circular ring and a second circular ring, the second circular ring is nested in the first circular ring, and an inner cavity of the second circular ring comprises a circular cavity and a cubic cavity, and the cubic cavity is used for making the height of the cube of the second section smaller and the cross-sectional area larger.
7. An alloy sheet applied to the S30 of the carriage bolt production method of claim 6, upsetting the carriage bolt blank to make the cone of the first section of the carriage bolt blank become hemispherical, the height of the cube of the second section becomes smaller, and the cross-sectional area becomes larger, the alloy sheet comprises a first circular ring and a second circular ring, the second circular ring is nested in the first circular ring, the inner cavity of the second circular ring comprises a circular cavity and a cube cavity, and the cube cavity is used for making the height of the cube of the second section smaller and the cross-sectional area larger.
8. The alloy sheet according to claim 7, wherein the first ring is made of SKD61.
9. The alloy sheet according to claim 8, wherein the material of the second ring is a tungsten steel alloy.
10. A carriage bolt produced by the method of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111347089.5A CN114192731B (en) | 2021-11-15 | 2021-11-15 | Method for producing carriage bolt, carriage bolt and alloy sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111347089.5A CN114192731B (en) | 2021-11-15 | 2021-11-15 | Method for producing carriage bolt, carriage bolt and alloy sheet |
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| Publication Number | Publication Date |
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| CN114192731A CN114192731A (en) | 2022-03-18 |
| CN114192731B true CN114192731B (en) | 2024-06-14 |
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| CN202111347089.5A Active CN114192731B (en) | 2021-11-15 | 2021-11-15 | Method for producing carriage bolt, carriage bolt and alloy sheet |
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| CN210475379U (en) * | 2019-07-17 | 2020-05-08 | 奥展实业有限公司 | Die for processing carriage bolt |
| CN210412367U (en) * | 2019-08-14 | 2020-04-28 | 赵守者 | DIN603 bolt mould |
| CN212495131U (en) * | 2020-06-12 | 2021-02-09 | 常熟市标准件厂有限公司 | Durable double-impact cold heading process female die |
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| CN203887132U (en) * | 2014-06-05 | 2014-10-22 | 济南实达紧固件有限公司 | Carriage bolt combined die |
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| Title |
|---|
| 半圆头方颈螺栓的冷镦成形工艺及关键模具设计;张燕;金属成形工艺(第04期);全文 * |
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| Publication number | Publication date |
|---|---|
| CN114192731A (en) | 2022-03-18 |
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Country or region after: China Address after: 250400 Shanshui Road, Chang'an Road, East District of Pingyin Industrial Park, Jinan City, Shandong Province Applicant after: Jinan Shida Fasteners Co.,Ltd. Address before: 250400 Shanshui Road, Chang'an Road, East District of Pingyin Industrial Park, Jinan City, Shandong Province Applicant before: JINAN STAR FASTENER Co.,Ltd. Country or region before: China |
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Inventor after: Huang Hui Inventor after: Liu Xingfu Inventor after: Zhong Chonggen Inventor after: Chen Jinhua Inventor after: Qin Yong Inventor after: Zhang Shaogang Inventor after: Jin Song Inventor after: Yin Fukuan Inventor before: Huang Hui Inventor before: Liu Xingfu Inventor before: Zhong Chonggen Inventor before: Chen Jinhua Inventor before: Qin Yong Inventor before: Zhang Shaogang Inventor before: Jin Song Inventor before: Yin Fukuan |
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