KR101658343B1 - Manufacturing method for washer which has cam pattern - Google Patents
Manufacturing method for washer which has cam pattern Download PDFInfo
- Publication number
- KR101658343B1 KR101658343B1 KR1020150083686A KR20150083686A KR101658343B1 KR 101658343 B1 KR101658343 B1 KR 101658343B1 KR 1020150083686 A KR1020150083686 A KR 1020150083686A KR 20150083686 A KR20150083686 A KR 20150083686A KR 101658343 B1 KR101658343 B1 KR 101658343B1
- Authority
- KR
- South Korea
- Prior art keywords
- washer
- metal powder
- sintering
- cam
- cam pattern
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 44
- 238000005245 sintering Methods 0.000 claims abstract description 41
- 239000002184 metal Substances 0.000 claims abstract description 34
- 229910052751 metal Inorganic materials 0.000 claims abstract description 34
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 239000011230 binding agent Substances 0.000 claims abstract description 8
- 238000007493 shaping process Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 9
- 238000000137 annealing Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 238000004663 powder metallurgy Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
-
- 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
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/24—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object
-
- 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
- F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
Abstract
The present invention relates to a method of manufacturing a washer in which a cam pattern is formed, comprising: preparing a metal powder having a diameter of 0.01 mm or less (S10); Mixing the metal powder and the binder (S20); (S30) for shaping the washer by applying a pressure of 3 to 10 Ton / cm < 2 > after pouring the mixed metal powder into a mold having a tooth pattern on one surface and a cam pattern on the other surface; And a first sintering step (S40) of sintering the molded washer in a sintering furnace set at a temperature of 1100 to 1350 DEG C for 30 to 60 minutes.
This has the advantage that the inclination angles of all the cam patterns are uniform, the error range is small, and the defect rate is low.
Description
The present invention relates to a method of manufacturing a washer in which a cam pattern is formed, and more particularly, to a method of manufacturing a washer in which a cam pattern is formed by a powder metallurgy method.
The washer is interposed between the bolts and the nuts to prevent the nuts from loosening and to distribute the pressure from the bolts and nuts. Depending on the shape, the washer, spring washer, Washer, washer, neck washer, fixing washer, whirlwasher, taper washer, band washer and fiber washer.
In recent years, in addition to the general washer as described above, a tooth pattern is formed on one side and a cam pattern is formed on the other side, as in
Particularly, the above-described washer is advantageous in that the angle of the cam pattern formed with the cam pattern is formed larger than the angle of the screw thread formed in the bolt, thereby remarkably increasing the frictional force and preventing the bolt from being loosened. 1 and 2 are side views of a washer in which a cam pattern provided on a bolt and a nut is formed. Specifically, as shown in FIG. 1, an inclination angle? Of a cam of a washer (hereinafter, referred to as 'cam washer') 3 having a cam pattern formed on one surface thereof is formed larger than a thread angle? Of the
However, in the related art, since the cam washer is manufactured by the press punch method, there is a high possibility that an error occurs in the inclination angle of the cam pattern. As described above, in the case of the cam washer, the accuracy of the inclination angle of the cam pattern is important, and when manufactured by the press punch method, an error occurs in each inclination angle. As a result, the cam pattern portion may not be completely engaged and may be disengaged, resulting in a problem of failing to function as a washer. Especially, the smaller the size of the bolt, the higher the possibility of loosening the bolt or nut due to the above error.
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Also, in the case of the press punch method, the above-mentioned error is likely to occur due to the specific restoring force of the metal during the heat treatment.
SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a method of manufacturing a washer in which a cam pattern capable of uniformly forming a cam pattern is formed by compression molding using metal powder will be.
According to an aspect of the present invention, there is provided a method of manufacturing a washer having a cam pattern, the method including: preparing a metal powder having a diameter of 0.01 mm or less; Mixing the metal powder and the binder; Forming a washer by applying a pressure of 7 to 10 Ton / cm 2 after pouring the mixed metal powder into a mold having a tooth pattern on one surface and a cam pattern on the other surface; And a first sintering step of sintering the formed washer in a sintering furnace set at a temperature of 1100 to 1350 캜 for 30 to 60 minutes.
The method of manufacturing a washer having a cam pattern according to the present invention is advantageous in that the inclination angle of all the cam patterns is uniform, the error range is small, and the defective rate is low.
1 and 2 are side views of a washer in which a cam pattern provided on a bolt and a nut is formed.
3 and 4 are block diagrams of a method of manufacturing a washer with a cam pattern according to the present invention
5 shows test results of a washer having a cam pattern according to the present invention manufactured using SUS 316-L (Example 1)
6 shows test results of a washer formed with a cam pattern according to the present invention manufactured using SUS 410-L (Example 2)
Hereinafter, a method of manufacturing a washer having a cam pattern according to the present invention will be described in detail with reference to the accompanying drawings.
The present invention relates to a method of manufacturing a washer in which a cam pattern is formed, and FIGS. 3 and 4 are block diagrams of a method of manufacturing a washer in which a cam pattern according to the present invention is formed.
A method of manufacturing a washer according to the present invention includes: a metal powder preparation step (S10) of preparing a metal powder having a diameter of 0.01 mm or less; A mixing step (S20) of mixing the metal powder and the binder; A forming step S30 of forming a washer by applying a pressure of 3 to 10 Ton / cm < 2 > after pouring mixed metal powder into a forming die having a tooth pattern on one surface and a cam pattern on the other surface; And a first sintering step (S40) of sintering the formed washer in a sintering furnace set at a temperature of 1100 to 1350 DEG C for 30 to 60 minutes.
Each configuration step is described in detail below.
The metal powder preparation step (S10) is a step of preparing a metal powder which is a material of the washer of the present invention to be manufactured. The present invention basically comprises the steps of using a metal powder having a diameter of 0.01 mm or less, Powders may also be used to make the inventive washer of a more elaborate form. Various kinds of metal powders may be used depending on the required strength of the washer to be manufactured. In the present invention, SUS 316-L and SUS 410-L are typically used. For reference, SUS 316-L has a hardness of 90 or less based on HRB, and SUS 410-L has a hardness of 183 or more based on HB.
In the present invention, titanium powder, high-speed steel powder and the like, which are special powders, may be used as needed.
The mixing step S20 is a step of mixing the metal powder prepared in the metal powder preparing step S10 with the binder. Specifically, a metal powder and a binder are put into a mixer such as a double cone or a V CONE, and then mixed at 15 to 20 RPM for 10 to 30 minutes.
The forming step S30 is a step of putting the metal powder mixed in the mixing step S20 into a mold and pressurizing it with a predetermined pressure to form a semi-finished product. In the present invention, since a washer is formed in which a saw tooth pattern is formed on one surface and a cam pattern is formed on the other surface, a metal mold suitable for the washer is prepared, and then the mixed metal powder is put into the mold and then pressure is applied. At this time, the pressure to be pressurized may vary depending on the kind of the mixed metal powder. For example, when the iron (Fe) is the main component, the pressure is 3 to 10 Ton / cm 2 , And a pressure of 2 to 5 Ton / cm 2 is pressed to be molded. When a stainless steel material is used, it is molded by applying a pressure of 5 to 8 Ton / cm 2 . In particular, since SUS 410-L has a higher hardness of SUS 316-L than SUS 316-L, it is preferable to pressurize to a higher pressure.
The first sintering step (S40) is a step of heating the inventive washer formed as a semi-finished product in the shaping step (S30) into a single lump of metal powder. Specifically, in the first sintering step (S40), the inventive washer having been subjected to the forming step (S30) is sintered in a sintering furnace set at a temperature of 1100 to 1350 DEG C for 30 to 60 minutes.
The annealing step (S50) is an optional step for increasing the hardness of the washer. The washer having been subjected to the first sintering step (S40) is heated to a temperature of 800 to 900 DEG C and then slowly cooled.
The second sintering step (S60) is a step of re-sintering the inventive washer after the annealing step (S50). Since the hardness of the metal material is lowered through the annealing step (S50), an additional sintering process is required. In general, powder metallurgy is known to have a lower strength than a product molded by a press in terms of strength. However, the present invention is characterized in that, by performing the annealing step (S50) and the second sintering step (S60), the strength of the relatively low powder metallurgy Can be supplemented to the level of the press-molded article.
The complementing step may be performed when a problem occurs in a detail portion of the inventive washer (for example, the dimension is too small or the hardness is too low, etc.), which is completed through the first sintering step (S40) or the second sintering step (S60) An additional step to compensate for this is the repressurization step, the calibration step, and the coining step. The repressurizing step, the calibrating step, and the coining step have a common point in that the washer of the present invention is inserted into the mold and then pressed again in the same manner as in the molding step S30, but there is a difference in the applied pressure depending on the purpose.
The repressurizing step is a step of increasing the density of the inventive washer through the first sintering step (S40) or the second sintering step (S60), wherein the washer is pressed at a pressure equal to or slightly higher than the pressing pressure in the forming step (S30) Pressure.
The calibration step is a step for producing an accurate shape of the shape of the inventive washer through the first sintering step (S40) or the second sintering step (S60). In particular, when the angle of the cam pattern part is small, . ≪ / RTI > At this time, the pressure is performed at a level similar to the pressure performed in the molding step S30.
The coining step further clarifies the shape of the surface of the inventive washer through the first sintering step (S40) or the second sintering step (S60), and pressurizes the washer at a higher pressure than the re-pressurizing step or the calibrating step .
Containing step is a step of preventing the occurrence of rust by incorporating anti-rust oil into the washer of the present invention which has been formed. In particular, in the case of the washer of the present invention, since there is a pore between the powder and the powder, it is preferable to contain anti-rust oil to prevent contact with moisture.
Hereinafter, an embodiment of a washer in which a cam pattern is formed according to the kind of powder to be used will be described.
Example 1: Manufacture of inventive washer using SUS 316-L
(SUS 316-L powder having a diameter of 0.01 mm is prepared (metal powder preparation step (S10)), SUS 316-L powder and binder are put together in a double cone and mixed at 17 rpm for 15 minutes {mixing step (S20) . Then, the mixed SUS 316-L powder was put into a prepared mold and pressed at a pressure of 6 ton / cm 2 (molding step (S30)). The molded article was sintered in a sintering furnace set at a temperature of 1150 ° C for 40 minutes (First sintering step (S40)). The first sintered washer was heated in a heating furnace set at 850 DEG C for 30 minutes and gradually cooled (annealing step (S50)), and the resultant was sintered for 30 minutes in a sintering furnace set at a temperature of 1150 DEG C Sintering step (S60)}.
Example 2: Manufacture of inventive washer using SUS 410-L
(SUS 410-L powder having a diameter of 0.01 mm is prepared (metal powder preparation step (S10)), SUS 410-L powder and binder are put together in a double cone and mixed at 17 rpm for 15 minutes {mixing step (S20) . Then, the mixed SUS 410-L powder was put into a prepared mold and pressed at a pressure of 7 ton / cm 2 (molding step (S30)). The molded article was put into a sintering furnace set at a temperature of 1150 ° C and sintered for 40 minutes (First sintering step (S40)). The first sintered washer was heated in a heating furnace set at 850 DEG C for 30 minutes, cooled gradually (annealing step (S50)) and sintered in a sintering furnace set at a temperature of 1150 DEG C for 30 minutes { Sintering step (S60)}.
The test analysis results of the inventive washer manufactured in each example will be described below.
5 is a test report of a washer (Example 1) in which a cam pattern is formed according to the present invention manufactured using SUS 316-L (Example 1) and FIG. 6 is a test report of a washer Example 2).
As shown in Fig. 5, in Example 1, the tensile strength was 431 N /
As shown in FIG. 6, the tensile strength was 382 N /
Thus, the washer formed with the cam pattern manufactured according to the present invention can maintain a high level of hardness.
Claims (4)
Mixing the metal powder and the binder (S20);
(S30) for shaping the washer by applying a pressure of 3 to 10 Ton / cm < 2 > after pouring the mixed metal powder into a mold having a tooth pattern on one surface and a cam pattern on the other surface;
A first sintering step (S40) of sintering the formed washer in a sintering furnace set at a temperature of 1100 to 1350 DEG C for 30 to 60 minutes;
An annealing step (S50) in which the washer having been subjected to the first sintering step (S40) is heated to a temperature of 800 to 900 DEG C and gradually cooled, and
And a second sintering step (S60) of sintering the washer having undergone the annealing step (S50) in a sintering furnace set at a temperature of 1100 to 1350 DEG C for 30 to 60 minutes. Gt;
Wherein the metal powder prepared in the metal powder preparing step (S10) has a diameter of 0.005 mm or less.
Wherein the metal powder prepared in the metal powder preparing step (S10) is SUS 316-L or SUS 410-L.
Further comprising a re-pressing step of applying pressure to the washer after the second sintering step (S60).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150083686A KR101658343B1 (en) | 2015-06-12 | 2015-06-12 | Manufacturing method for washer which has cam pattern |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150083686A KR101658343B1 (en) | 2015-06-12 | 2015-06-12 | Manufacturing method for washer which has cam pattern |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR101658343B1 true KR101658343B1 (en) | 2016-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020150083686A KR101658343B1 (en) | 2015-06-12 | 2015-06-12 | Manufacturing method for washer which has cam pattern |
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| KR (1) | KR101658343B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019241097A1 (en) * | 2018-06-11 | 2019-12-19 | Chapman John Eric | Hybrid washer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0754004A (en) * | 1993-08-17 | 1995-02-28 | Mitsubishi Steel Mfg Co Ltd | Production of sintered product of head metal powder |
| JP2004100851A (en) * | 2002-09-10 | 2004-04-02 | Mitsubishi Materials Corp | Sintered bearing, and method for manufacturing the same |
| KR20130051450A (en) * | 2010-04-20 | 2013-05-20 | 노드-락 에이비 | A method and a plant for washer production and a washer |
| KR101305532B1 (en) | 2005-05-31 | 2013-09-06 | 노드-락 에이비 | A method and a device for the manufacturing of washers and washer for a locking system |
-
2015
- 2015-06-12 KR KR1020150083686A patent/KR101658343B1/en active IP Right Grant
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0754004A (en) * | 1993-08-17 | 1995-02-28 | Mitsubishi Steel Mfg Co Ltd | Production of sintered product of head metal powder |
| JP2004100851A (en) * | 2002-09-10 | 2004-04-02 | Mitsubishi Materials Corp | Sintered bearing, and method for manufacturing the same |
| KR101305532B1 (en) | 2005-05-31 | 2013-09-06 | 노드-락 에이비 | A method and a device for the manufacturing of washers and washer for a locking system |
| KR20130051450A (en) * | 2010-04-20 | 2013-05-20 | 노드-락 에이비 | A method and a plant for washer production and a washer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019241097A1 (en) * | 2018-06-11 | 2019-12-19 | Chapman John Eric | Hybrid washer |
| US11867222B2 (en) | 2018-06-11 | 2024-01-09 | John Eric Chapman | Hybrid washer |
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