CN1748884A - Method for producing trailer screw blank piece - Google Patents
Method for producing trailer screw blank piece Download PDFInfo
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- CN1748884A CN1748884A CN 200510061092 CN200510061092A CN1748884A CN 1748884 A CN1748884 A CN 1748884A CN 200510061092 CN200510061092 CN 200510061092 CN 200510061092 A CN200510061092 A CN 200510061092A CN 1748884 A CN1748884 A CN 1748884A
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Abstract
The trailer screw blank making process includes the following steps: cutting material, cold extruding to reduce the lower section, cold extruding and upsetting the upper section to bulge the upper and the middle section, cold extruding to form the upper ball and to bulge the middle section, cold extruding and upsetting the middle section to form the washer blank and to form the reduced neck area between the ball and the washer blank, and cold extruding the lower section to form the screw blank column. The said cold extrusion process of making trailer screw blank has less material loss, small cutting allowance, high material utilization rate, low cost, short fine machining period and improved blank appearance.
Description
Technical field
The present invention relates to a kind of manufacture method of trailer screw blank piece.
Background technology
Trailer screw is the trailer part of motor vehicle, and it comprises tow ball, pad, threaded post.It is connected on the motor vehicle by threaded post, and plays the effect of locating and reinforcing the connection by pad, during trailer, hook attachment for trailer is installed in the zone between tow ball and the pad, the shape of pad can be circle, polygon or abnormity, between pad and the tow ball, and general arc transition.
At present, the blank of trailer screw adopts this method manufacturing generally by the hot extrusion manufacturing, and the blank consumptive material is big, and chipping allowance reaches 47% when fine finishining, waste material, and cause finishing step long, when taking a lot of work very much, the outward appearance of workpiece is not good yet.
Summary of the invention
Technical problem to be solved by this invention provides a kind of manufacture method that overcomes the trailer screw blank piece of above-mentioned defective.For this reason, the present invention is by the following technical solutions: it may further comprise the steps:
A, fracture,
B, cold extrusion materials and parts make the materials and parts lower semisection bar that contracts,
C, cold extrusion materials and parts, the upper semisection of jumping-up materials and parts makes materials and parts outwards bloat in epimere to the part between the middle part,
D, cold extrusion materials and parts, make the epimere of materials and parts be shaped to trailer screw the trailer ball-billet shape, and materials and parts are outwards bloated at the middle part,
E, cold extrusion materials and parts, the stage casing of jumping-up materials and parts becomes the pad base shape of trailer screw, and between trailer ball-billet shape and pad base shape moulding necking down transition region;
The order of above step is: A → B → C → D → E or A → C → B → D → E,
In any one step of B, C, D, E, simultaneously the hypomere cold-extruded constrictor of materials and parts is become the threaded post base shape of trailer screw.
For solving technical problem to be solved, the present invention also can be by the following technical solutions: it comprises aforesaid A, B, C, D, E, and the order of above-mentioned steps is: A → B → C → D → E or A → C → B → D → E; It comprises that also hypomere cold-extruded constrictor to materials and parts becomes the threaded post base shape of trailer screw or becomes the step of threaded post base shape, this step to be among A, B, C, D, the E after any one step by machined into.
For solving technical problem to be solved, the present invention also can be by the following technical solutions: it comprises aforesaid A, B, C, E, also comprise following two steps simultaneously, be DM: the cold extrusion materials and parts, make the epimere of materials and parts be shaped to the trailer ball-billet shape of trailer screw, DN: the cold extrusion materials and parts make materials and parts outwards bloat at the middle part.At this moment, the order of step is A → B → C → DM → DN → E or A → C → DM → B → DN → E or A → C → B → DM → DN → E.In any one step of B, C, E, DM, DN, to the hypomere cold extrusion of materials and parts, the bar that contracts becomes the threaded post base shape of trailer screw simultaneously." to the hypomere cold extrusion of materials and parts, the bar that contracts becomes the threaded post base shape of trailer screw " also can be used as an independent step and is in after A, B, C, E, any one step of DM, DN.Perhaps, the threaded post base shape of materials and parts lower end can form by car system, and this car system process also can be used as an independent step and is in after A, B, C, E, any one step of DM, DN.
For solving technical problem to be solved, the present invention also can be by the following technical solutions: it comprises aforesaid A, D, E, also comprise step BN simultaneously: the cold extrusion materials and parts, make the materials and parts lower semisection bar that contracts, and the upper semisection of while jumping-up materials and parts, materials and parts are outwards bloated in epimere to the part between the middle part; The order of above step is: A → BN → D → E; It comprises that also hypomere cold-extruded constrictor to materials and parts becomes the threaded post base shape of trailer screw, and this step may be incorporated among above-mentioned any step except that A." to the hypomere cold extrusion of materials and parts, the bar that contracts becomes the threaded post base shape of trailer screw " also can be used as an independent step and is in after A, BN, any one step of D, E.Perhaps, the threaded post base shape of materials and parts lower end can form by car system, and this step also can be used as an independent step and is in after A, BN, any one step of D, E.
For solving technical problem to be solved, the present invention also can be by the following technical solutions: it comprises aforesaid steps A, BN, DM, DN, E; Step order be: A → BN → DM → DN → E; It comprises that also hypomere cold-extruded constrictor to materials and parts becomes the threaded post base shape of trailer screw, and this step may be incorporated among above-mentioned any step except that A." to the hypomere cold extrusion of materials and parts, the bar that contracts becomes the threaded post base shape of trailer screw " also can be used as an independent step and is in after A, BN, DM, DN, any one step of E.Perhaps, the threaded post base shape of materials and parts lower end can form by car system, and this car system process also can be used as an independent step and is in after A, BN, DM, DN, any one step of E.
Owing to adopted technique scheme, the invention enables the blank of trailer screw can adopt the manufacturing of cold-stamped method, the consumable quantity of blank is declined to a great extent, accurately machined chipping allowance only 11%, stock utilization reaches 89%, can significantly reduce manufacturing cost, shorten finishing step and time, improve the outward appearance of blank.
Description of drawings
Fig. 1 is the worker position flow chart of the embodiment of the invention 1.
Fig. 2 is the worker position flow chart of the embodiment of the invention 2.
Fig. 3 is the worker position flow chart of the embodiment of the invention 3.
Fig. 4 is the worker position flow chart of the embodiment of the invention 4.
Fig. 5 is the worker position flow chart of the embodiment of the invention 5.
Fig. 6 is the worker position flow chart of the embodiment of the invention 8.
Fig. 7 is the worker position flow chart of the embodiment of the invention 9.
Fig. 8 is the worker position flow chart of the embodiment of the invention 10.
Fig. 9 is the worker position flow chart of the embodiment of the invention 11.
Figure 10 is the worker position flow chart of the embodiment of the invention 12.
Figure 11 is the worker position flow chart of the embodiment of the invention 11.
Figure 12 is the worker position flow chart of the embodiment of the invention 12.
The specific embodiment
With reference to accompanying drawing 1.It comprises the following steps of carrying out successively:
A, fracture, the round steel 11 of intercepting certain-length;
B, cold extrusion materials and parts make the materials and parts lower semisection bar that contracts, and as shown in Figure 1, the lower semisection of materials and parts is shaped to the part of drawing reference numeral 122 by the bar that contracts, and the diameter of this part is smaller than the diameter of round steel 11, this part and thicker upper semisection chamfered transition;
Materials and parts after C, cold extrusion are pushed through the B step, the upper semisection of jumping-up materials and parts makes materials and parts outwards bloat 132 in epimere to the part between the middle part,
D, the cold extrusion materials and parts after through the extruding of C step, make the epimere of materials and parts be shaped to trailer screw trailer ball-billet shape 141, and make materials and parts outwards bloat 142 simultaneously at the middle part,
E, the cold extrusion materials and parts after through the extruding of D step, the stage casing of jumping-up materials and parts becomes the pad base shape 153 of trailer screw, and between trailer ball-billet shape 141 and pad base shape moulding necking down transition region 152.
The order of steps of present embodiment is of the present invention preferred, has searched out preferable equalization point between the making cost that reduces cold-stamped step, reduction cold extrusion difficulty and mould.
Among the step C, the upper semisection cold extrusion of materials and parts is upset as similar inverted wine jar shape, or as shown in Figure 1, upper semisection cold extrusion except that the upper end of materials and parts is upset as similar inverted wine jar shape 132.Certainly, the shape that bloats is not limited thereto, but also can reduce the difficulty of subsequent step with the easy extrusion modling of this shape.
In step D,, make materials and parts outwards bloat into similar wine jar shape 142 at the middle part to the stage casing cold extrusion jumping-up of materials and parts.Certainly, the shape that bloats is not limited thereto, but also can reduce the difficulty of subsequent step with the easy extrusion modling of this shape.
It comprises that also hypomere cold-extruded constrictor to materials and parts becomes the threaded post base shape 143 of trailer screw, and this base shape becomes the threaded post of trailer screw after rolling tooth or grinding tooth.This extruding may be incorporated in any one step of B, C, D, E, but with as present embodiment, it is the most reasonable to be incorporated among the step D, can reduce the manufacturing cost of mould.Shown in the D and E step of Fig. 1, also there be the diameter step 144 bigger slightly under the pad base shape 153 and between the threaded post base shape than threaded post base shape, on this step, incite somebody to action not machining screw.If the cylinder under the pad base shape 153 all needs machining screw, only need that this section materials and parts are all squeezed constrictor to corresponding diameter and get final product.
For step B, also can consider simultaneously upper semisection is carried out pre-upsetting to a certain degree.
Embodiment 2
With reference to accompanying drawing 2, in the present embodiment, " the hypomere cold-extruded constrictor of materials and parts being become the threaded post base shape 233 of trailer screw " is incorporated in the C step.Other is with embodiment 1, and in Fig. 2, the drawing reference numeral identical with Fig. 1 represented identical implication.
Embodiment 3
With reference to accompanying drawing 3, in the present embodiment, " the hypomere cold-extruded constrictor of materials and parts being become the threaded post base shape 333 of trailer screw " is incorporated in the B step.Other is with embodiment 1.In Fig. 3, the drawing reference numeral representative identical implication identical with Fig. 1.
Embodiment 4
With reference to Fig. 4.In the present embodiment, A, B, C, D, E step and order are identical with embodiment 1.
In the present embodiment, the hypomere cold-extruded constrictor of materials and parts is become the threaded post base shape 400 of trailer screw, as an independent step, be between step C and the step D, this step is represented with H in Fig. 4.Certainly this step also can be between steps A and the step B or between step B and the step C or between step D and the step e or after the step e.In addition, " hypomere of materials and parts is shaped to the threaded post base shape of trailer screw " and also can adopts by machined into and form, this car system process can be between steps A and the step B as an independent step or between step B and the step C or between step C and the step D or between step D and the step e or after the step e.In Fig. 4, the drawing reference numeral representative identical implication identical with Fig. 1.
Embodiment 5
With reference to Fig. 5.In the present embodiment, carry out in the following order: A → C → B → D → E, all the other are with embodiment 1.In Fig. 5, the drawing reference numeral representative identical implication identical with Fig. 1.
Embodiment 6
In the present embodiment, carry out in the following order: A → C → B → D → E, all the other are with embodiment 2.
Embodiment 7
In the present embodiment, carry out in the following order: A → C → B → D → E, all the other are with embodiment 3.
Embodiment 8
With reference to Fig. 6.In the present embodiment, A, B, C, D, E step and order are identical with embodiment 5.
In the present embodiment, the hypomere cold-extruded constrictor of materials and parts is become the threaded post base shape 800 of trailer screw, as an independent step, be between step B and the step D, this step is represented with 8H in Fig. 4.Certainly this step also can be between steps A and the step C or between step C and the step B or between step D and the step e or after the step e.In addition, " hypomere of materials and parts is shaped to the threaded post base shape of trailer screw " and also can adopts by machined into and form, this car system process can be between steps A and the step B as an independent step or between step B and the step C or between step C and the step D or between step D and the step e or after the step e.In Fig. 6, the drawing reference numeral representative identical implication identical with Fig. 1.
Embodiment 9
With reference to accompanying drawing 7.In the present embodiment, the D step of embodiment 1 is split as: the materials and parts after DM step, cold extrusion are pushed through the C step, make the epimere of materials and parts be shaped to the trailer ball-billet shape of trailer screw, materials and parts after DN step, cold extrusion are pushed through the DM step, materials and parts are outwards bloated at the middle part, and the order of above step is: A → B → C → DM → DN → E.In Fig. 7, the drawing reference numeral representative identical implication identical with Fig. 1.
The hypomere cold-extruded constrictor of materials and parts is become the threaded post base shape 900 of trailer screw, may be incorporated in any one step of B, C, DM, DN, E, but the most reasonable, can reduce the manufacturing cost of mould to be incorporated among the step DM.
The order of steps of present embodiment is of the present invention preferred, has searched out preferable equalization point between the making cost that reduces cold-stamped step, reduction cold extrusion difficulty and mould.
The same with embodiment 1, described bloating can be configured as the wine jar shape.
Embodiment 10
With reference to accompanying drawing 8.Present embodiment is substantially the same manner as Example 9, just carry out in the following order: A → C → DM → B → DN → E, and, to become the threaded post base shape 1000 of trailer screw to the hypomere cold-extruded constrictor of materials and parts, may be incorporated in step DN, certainly, this extruding may be incorporated in any one step of B, C, DM, E.In Fig. 8, the drawing reference numeral representative identical implication identical with Fig. 1.
With reference to accompanying drawing 9.Present embodiment is substantially the same manner as Example 9, just carries out in the following order: A → C → B → DM → DN → E.The hypomere cold-extruded constrictor of materials and parts is become the threaded post base shape 1100 of trailer screw, may be incorporated in any one step of B, C, DM, DN, E, present embodiment is incorporated among the step DM.In Fig. 9, the drawing reference numeral representative identical implication identical with Fig. 1.
Embodiment 12
With reference to accompanying drawing 10.Present embodiment is substantially the same manner as Example 9, just will become the threaded post base shape 1200 of trailer screw to separate the hypomere cold-extruded constrictor of materials and parts as independent step, this step is named with 11H, and be in after the DM step, certainly, it can be between other adjacent step or after last step.In addition, " hypomere of materials and parts is shaped to the threaded post base shape of trailer screw " and also can adopts by machined into and form, this car system process can be between steps A and the step B as an independent step or between step B and the step C or between step C and the step D or between step D and the step e or after the step e.In Figure 10, the drawing reference numeral representative identical implication identical with Fig. 1.
Embodiment 13
With reference to accompanying drawing 11.Present embodiment is merged into step BN with step B and the step C of embodiment 1, that is, and and the cold extrusion materials and parts, make the materials and parts lower semisection bar that contracts, and the upper semisection of while jumping-up materials and parts, materials and parts are outwards bloated to the part between the middle part at epimere, the order of step is: A → BN → D → E.In Figure 11, the drawing reference numeral representative identical implication identical with Fig. 1.
In any one step of BN, D, E, simultaneously the hypomere cold-extruded constrictor of materials and parts is become the threaded post base shape 1300 of trailer screw.Present embodiment is incorporated in this extruding among the step D.
Certainly, it can be an independent step that the hypomere cold-extruded constrictor of materials and parts is become the threaded post base shape of trailer screw, is between the above-mentioned steps or is in last step.Perhaps, " hypomere of materials and parts being shaped to the threaded post base shape of trailer screw " also can adopt by machined into and form, and this car system process is between the above-mentioned steps as an independent step or is in last step.
Embodiment 14
With reference to accompanying drawing 12.Present embodiment is on the basis of embodiment 13, D is split as with step: DM, cold extrusion materials and parts, the upper semisection of jumping-up materials and parts becomes the trailer ball-billet shape of trailer screw, DN, cold extrusion materials and parts, the stage casing of jumping-up materials and parts, materials and parts are outwards bloated to the part between the hypomere at the middle part, and the order of above step is: A → BN → DM → DN → E.In Figure 12, the drawing reference numeral representative identical implication identical with Fig. 1.
In any one step of BN, DM, DN, E, simultaneously the hypomere cold-extruded constrictor of materials and parts is become the threaded post base shape 1400 of trailer screw.Present embodiment is incorporated in this extruding among the step DN.
Certainly, it is an independent step that the hypomere cold-extruded constrictor of materials and parts is become the threaded post base shape of trailer screw, is between the above-mentioned steps or is in last step.Perhaps, " hypomere of materials and parts being shaped to the threaded post base shape of trailer screw " also can adopt by machined into and form, and this car system process is between the above-mentioned steps as an independent step or is in last step.
More than by embodiment the present invention has been done further to specify, enumerate these embodiment, its objective is that the person can more easily understand the present invention for easy reference, these embodiment should not be understood that the present invention is wanted the restriction of protection domain.In fact, the fractionation of above-mentioned steps is obtained merging, and pressing steps in the middle of between two steps, adding again; perhaps before any one step, add other steps; such as annealing or nodularization step, all be among the technical scheme provided by the invention, be in protection scope of the present invention.Manufacturing step of the present invention can be the manufacture process of carrying out some steps on an extruder along with the difference of extruder.Difference along with the appearance and size of trailer screw; in pressing steps; the size of its extrusion modling and profile all can some differences; such as: wine jar shape protrude the materials and parts length of 142 size, the bar that contracts, diameter behind the bar that contracts all can some difference, but these variations all are in protection scope of the present invention.For another example, the finally shaped shape of pad also has difference along with the difference of trailer screw, and such as being circle, polygon or abnormity, as long as this adopt in corresponding step, and corresponding mould can or increase a step as cutting shape.
Claims (10)
1, a kind of manufacture method of trailer screw blank piece is characterized in that it may further comprise the steps:
A, fracture,
B, cold extrusion materials and parts make the materials and parts lower semisection bar that contracts,
C, cold extrusion materials and parts, the upper semisection of jumping-up materials and parts makes materials and parts outwards bloat in epimere to the part between the middle part,
D, cold extrusion materials and parts, make the epimere of materials and parts be shaped to trailer screw the trailer ball-billet shape, and materials and parts are outwards bloated at the middle part,
E, cold extrusion materials and parts, the stage casing of jumping-up materials and parts becomes the pad base shape of trailer screw, and between trailer ball-billet shape and pad base shape moulding necking down transition region;
The order of above step is: A → B → C → D → E or A → C → B → D → E,
In any one step of B, C, D, E, simultaneously the hypomere cold-extruded constrictor of materials and parts is become the threaded post base shape of trailer screw.
2, a kind of manufacture method of trailer screw blank piece is characterized in that it may further comprise the steps:
A, fracture,
B, cold extrusion materials and parts make the materials and parts lower semisection bar that contracts,
C, cold extrusion materials and parts, the upper semisection of jumping-up materials and parts makes materials and parts outwards bloat in epimere to the part between the middle part,
D, cold extrusion materials and parts, make the epimere of materials and parts be shaped to trailer screw the trailer ball-billet shape, and materials and parts are outwards bloated at the middle part,
E, cold extrusion materials and parts, the stage casing of jumping-up materials and parts becomes the pad base shape of trailer screw, and between trailer ball-billet shape and pad base shape moulding necking down transition region;
The order of above step is: A → B → C → D → E or A → C → B → D → E,
It comprises that also hypomere cold-extruded constrictor to materials and parts becomes the threaded post base shape of trailer screw or becomes the step of threaded post base shape by machined into.
3, a kind of manufacture method of trailer screw blank piece is characterized in that it may further comprise the steps:
A, fracture,
B, cold extrusion materials and parts make the materials and parts lower semisection bar that contracts,
C, cold extrusion materials and parts, the upper semisection of jumping-up materials and parts makes materials and parts outwards bloat in epimere to the part between the middle part,
DM, cold extrusion materials and parts make the epimere of materials and parts be shaped to the trailer ball-billet shape of trailer screw
DN, cold extrusion materials and parts make materials and parts outwards bloat at the middle part,
E, cold extrusion materials and parts, the stage casing of jumping-up materials and parts becomes the pad base shape of trailer screw, and between trailer ball-billet shape and pad base shape moulding necking down transition region;
The order of above step is: A → B → C → DM → DN → E or A → C → DM → B → DN → E or A → C → B → DM → DN → E,
In any one step of B, C, DM, DN, E, simultaneously the hypomere cold-extruded constrictor of materials and parts is become the threaded post base shape of trailer screw.
4, a kind of manufacture method of trailer screw blank piece is characterized in that it may further comprise the steps:
A, fracture,
B, cold extrusion materials and parts make the materials and parts lower semisection bar that contracts,
C, cold extrusion materials and parts, the upper semisection of jumping-up materials and parts makes materials and parts outwards bloat in epimere to the part between the middle part,
DM, cold extrusion materials and parts make the epimere of materials and parts be shaped to the trailer ball-billet shape of trailer screw
DN, cold extrusion materials and parts make materials and parts outwards bloat at the middle part,
E, cold extrusion materials and parts, the stage casing of jumping-up materials and parts becomes the pad base shape of trailer screw, and between trailer ball-billet shape and pad base shape moulding necking down transition region;
The order of above step is: A → B → C → DM → DN → E or A → C → DM → B → DN → E or A → C → B → DM → DN → E,
It comprises that also hypomere cold-extruded constrictor to materials and parts becomes the threaded post base shape of trailer screw or becomes the step of threaded post base shape by machined into.
5, a kind of manufacture method of trailer screw blank piece is characterized in that it may further comprise the steps:
A, fracture,
BN, cold extrusion materials and parts make the materials and parts lower semisection bar that contracts, and the upper semisection of jumping-up materials and parts simultaneously, and materials and parts are outwards bloated in epimere to the part between the middle part,
D, cold extrusion materials and parts, the epimere make materials and parts of upsetting be shaped to trailer screw the trailer ball-billet shape, and materials and parts are outwards bloated at the middle part,
E, cold extrusion materials and parts, the stage casing of jumping-up materials and parts becomes the pad base shape of trailer screw, and between trailer ball-billet shape and pad base shape moulding necking down transition region;
The order of above step is: A → BN → D → E,
In any one step of BN, D, E, simultaneously the hypomere cold-extruded constrictor of materials and parts is become the threaded post base shape of trailer screw; Or it also comprises the step that the hypomere cold-extruded constrictor of materials and parts is become the threaded post base shape of trailer screw; Or it also comprises the step that the hypomere of materials and parts is become threaded post base shape by machined into.
6, a kind of manufacture method of trailer screw blank piece is characterized in that it may further comprise the steps:
A, fracture,
BN, cold extrusion materials and parts make the materials and parts lower semisection bar that contracts, and the upper semisection of jumping-up materials and parts simultaneously, and materials and parts are outwards bloated in epimere to the part between the middle part,
DM, cold extrusion materials and parts make the epimere of materials and parts be shaped to the trailer ball-billet shape of trailer screw,
DN, cold extrusion materials and parts make materials and parts outwards bloat at the middle part,
E, to the stage casing of materials and parts once more cold extrusion be upset as the pad base shape of trailer screw;
The order of above step is: A → BN → DM → DN → E;
In any one step of BN, DM, DN, E, to the hypomere cold extrusion of materials and parts, the bar that contracts becomes the threaded post base shape of trailer screw simultaneously; Or it also comprises the hypomere cold extrusion to materials and parts, and the bar that contracts becomes the step of the threaded post base shape of trailer screw; Or it also comprises the step that the hypomere of materials and parts is become threaded post base shape by machined into.
7, as the manufacture method of claim 1,2,3 or 4 described a kind of trailer screw blank pieces, it is characterized in that in described step C, upper semisection cold extrusion to materials and parts is upset as similar inverted wine jar shape, or upper semisection cold extrusion except that the upper end of materials and parts is upset as similar inverted wine jar shape.
8, as the manufacture method of claim 1,2 or 5 described a kind of trailer screw blank pieces, it is characterized in that in described step D, to the middle part cold extrusion jumping-up of materials and parts, make materials and parts outwards bloat into similar wine jar shape at the middle part.
9, as the manufacture method of claim 5 or 6 described a kind of trailer screw blank pieces, it is characterized in that in described step BN, the upper semisection cold extrusion of materials and parts is upset as similar inverted wine jar shape or upper semisection cold extrusion except that the upper end of materials and parts is upset as similar inverted wine jar shape.
10, as the manufacture method of claim 3,4 or 6 described a kind of trailer screw blank pieces, it is characterized in that in described step DN, to the middle part cold extrusion jumping-up of materials and parts, make materials and parts outwards bloat into similar wine jar shape at the middle part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100610925A CN100391635C (en) | 2005-10-11 | 2005-10-11 | Method for producing trailer screw blank piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100610925A CN100391635C (en) | 2005-10-11 | 2005-10-11 | Method for producing trailer screw blank piece |
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| Publication Number | Publication Date |
|---|---|
| CN1748884A true CN1748884A (en) | 2006-03-22 |
| CN100391635C CN100391635C (en) | 2008-06-04 |
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| CNB2005100610925A Expired - Fee Related CN100391635C (en) | 2005-10-11 | 2005-10-11 | Method for producing trailer screw blank piece |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105642817A (en) * | 2016-03-18 | 2016-06-08 | 浙江机电职业技术学院 | Plastic molding method of spherical hexagon bolt |
| CN108356188A (en) * | 2018-01-02 | 2018-08-03 | 深圳航空标准件有限公司 | The manufacture craft and its ball stud of the ball stud of automobile trunk telescopic rod connection |
| CN112387911A (en) * | 2020-10-26 | 2021-02-23 | 广州法思特精密五金有限公司 | Tooth plate capable of extruding taper of tail of screw |
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| JPH0638970B2 (en) * | 1986-09-17 | 1994-05-25 | 武蔵精密工業株式会社 | Manufacturing method of ball stud with neck groove |
| JPH01228636A (en) * | 1988-03-07 | 1989-09-12 | Susumu Ito | Multistep cold forging method for eye bolt |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105642817A (en) * | 2016-03-18 | 2016-06-08 | 浙江机电职业技术学院 | Plastic molding method of spherical hexagon bolt |
| CN108356188A (en) * | 2018-01-02 | 2018-08-03 | 深圳航空标准件有限公司 | The manufacture craft and its ball stud of the ball stud of automobile trunk telescopic rod connection |
| CN112387911A (en) * | 2020-10-26 | 2021-02-23 | 广州法思特精密五金有限公司 | Tooth plate capable of extruding taper of tail of screw |
| CN112387911B (en) * | 2020-10-26 | 2022-09-16 | 广州法思特精密五金有限公司 | Tooth plate capable of extruding taper of tail of screw |
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| CN100391635C (en) | 2008-06-04 |
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