KR20030002584A - Manufacturing method of lock flange nut removing paint film - Google Patents

Abstract

PURPOSE: A nut is provided with a loosening preventing function, thereby washer is needless and paint is removed easily without additional process. CONSTITUTION: A method for manufacturing nut comprises a step of cutting(110) raw material, a rounding process(120), a hexagonal shaping process(130), a flange forming process(140), a punching process(150) to punch a hole in the central axis, a tapping process(160) to form screw in the hole, and a paint forming process(170). The raw material having the hole in the center is placed in the inner side of the mold by a transferring member. A plurality of discharging grooves is formed in inside of the hole by penetrating pins(10). The distance between screw lines are shorted to prevent loosening after tapping process.

Description

Manufacturing method of anti-loosening seated nut with film removal function {Manufacturing method of lock flange nut removing paint film}

The present invention relates to a method for manufacturing a loosening seated nut having a film removing function, and more particularly, since the nut can perform its own loosening prevention function, there is no need for an anti-loosening washer, so it is less expensive to use. The present invention relates to a method of manufacturing an anti-loosening seated nut having a film removing function, which can easily remove a coating film of a bolt without requiring any additional work for removing the coating film for grounding.

In general, a nut is a female screw used for fastening a machine part by being bolted to a male screw, and a general nut is usually hexagonal, and its parallel surface is turned by a spanner.

Special ones include butterfly nuts with hexagonal, octagonal or butterfly grips, seated nuts, cap nuts, ring nuts and red nut nuts.

Among the nuts, seated nuts (or flange nuts, hereinafter referred to as nuts), which are anti-loosening nuts commonly used in various devices, are provided with anti-loosening washers at the bottom of the flange of the nut to prevent loosening of the nut due to external impact. It is prevented beforehand.

Figure 7 schematically shows a manufacturing method of a conventional seated nut, Figure 7a is an explanatory view showing a cutting process, Figure 7b is an explanatory view showing a round molding process, Figure 7c is an explanatory view showing a hexagonal molding process. FIG. 7D is an explanatory diagram showing a flange forming process, FIG. 7E is an explanatory diagram showing a drilling process, and FIG. 7F is an explanatory diagram showing a tapping process.

The manufacturing of such a seated nut is first performed by a cutting process 110 that cuts the raw material 116 extruded into a rod into a cutting machine 114 having a dimension of approximately 11 mm. It is divided into the raw material (112).

After the cut nut raw material 112 is seated inside the rounding mold 124, it is subjected to a rounding molding process 120 to form a rounded bottom by pressing with a punch 126.

The nut raw material 122, which has undergone the rounding process 120, is rotated 180 degrees by the transfer means (not shown), and is seated inside the hexagonal mold 134 and pressed by the punch 136 to be hexagonal on the upper side. The portion 133 is subjected to the hexagonal molding process 130 is molded.

The nut raw material 132 formed at the upper side of the hexagonal shape is rotated 180 ° by the conveying means again and is seated inside the flange mold 144 and pressurized by the punch 146 to approximately 1 mm at the top of the nut raw material 142. A flange portion 148 having a thickness is formed, and the flange portion 148 passes through a flange forming process 140 in which a plurality of locking projections 149 are formed to protrude.

The nut raw material 142 having the flange 148 and the plurality of locking jaws 149 formed thereon is seated on the inner side of the punching die 154 without rotation by the conveying means and attached to the piercing pin 156. By the hole 153 is drilled in the center side through the drilling process 150.

The nut material 152 having the hole 153 drilled therein is manufactured through the tapping process 160 for forming the thread 163 by the tapping means 166.

The nut 100 is used in a state in which rust is prevented through the coating film forming process 170 for electrodeposition coating, and thus the nut 100 having the coating film coated thereon is screwed onto a bolt (not shown) coated with paint. It is fastened so that the object can be fastened without being loosened.

However, the conventional seated nut 100 can perform the anti-loosening function as the anti-loosening nut 100 only when the anti-loosening washers (not shown) exist in the lower portion of the flange 148, the lower locking jaw 149. There was a problem that can not perform the anti-loosening function, due to this there is a problem in that the cost burden that must be purchased in the same quantity as the nut 100 is placed even loosening washer.

In addition, when the nut 100 is used to secure some parts of the vehicle to the vehicle body, some parts such as an ECU (Electric Control Unit) or ABS (Anti-Lock Brake System) (! 00) is to be grounded to the vehicle body (not shown), at this time, by performing a separate operation on the connection portion of the conventional nut 100 and the bolt is removed after the coating film is fastened.

However, if the coating of the coating is removed in a separate operation and then the nut 100 is fastened to the bolt, there is a problem in that the ECU or ABS is not smoothly operated due to the grounding failure.

In particular, in the case where the coating film of the mating bolt is thick, if the worker tightens the nut with excessive force, the bolt is broken and broken.

In addition, there is a problem that the work is cumbersome and inconvenient because the work of the nut 100 or the bolt of the bolt to be removed by a separate work, the work efficiency is reduced.

The present invention is to solve the above-mentioned conventional problems, the nut can perform its own anti-loosening function, so there is no need for the anti-loosening washers, so the cost of use is low, and the coating film is removed for grounding. It is an object of the present invention to provide a method of manufacturing an anti-loosening seated nut having a film removing function, which can easily remove a coating film of a bolt without requiring any separate work.

In order to achieve the above object, the present invention provides a cutting process for cutting raw materials into a plurality of nut raw materials, a round molding process for forming a rounded bottom by pressing with a punch, and a hexagonal molding process for forming a hexagon by being punched by a punch. And a flange forming step of forming a flange portion at the upper end by being punched by a punch and forming a plurality of locking jaws at the upper end of the flange, a drilling process in which a hole is drilled at the center side by a piercing pin, and forming a thread in the hole. In the manufacturing method of the seated nut which consists of a tapping process and the coating-film forming process of electrodeposition-coating a coating material;

Discharge groove forming process for seating the nut raw material with the hole formed in the center through the drilling process as it is inside the discharge groove mold by the transfer means, and forming the plurality of discharge grooves in the hole with the discharge groove punch pin having a plurality of protruding jaws; And

The thread inside the upper end of the nut raw material which has been subjected to the tapping process is characterized by further comprising an anti-loosening thread forming step of narrowing the distance between the thread and the adjacent thread by the thread deformation means.

The anti-loosening thread forming process by thread deformation means has three tapered deformation protrusions which are seated in the mold as they are by means of moving the nut raw material which has undergone the tapping process, and three protrusions of the upper end of the hexagonal part of the nut raw material are inclined downward outward. It is characterized by being hit and deformed with a locking punch.

In addition, the anti-loosening thread forming process by the thread deforming means seats the raw nut material through the tapping process on the mold as it is by the moving means, and has two parallel deformed protrusions projected downward downward from the left and right sides of the upper end of the hexagonal portion of the nut raw material. It may be made by hitting and deforming with a locking punch having.

In addition, the anti-loosening thread forming process by the thread deformation means may be performed by placing the nut raw material that has undergone the tapping process into the mold as it is by the moving means and passing it between two deformation rollers that rotate the upper end of the hexagonal portion of the nut raw material. have.

In addition, the anti-loosening thread forming process by the thread deforming means seats the raw nut material through the tapping process on the mold as it is by the moving means, and has a locking protrusion consisting of a diameter slightly larger than the hole diameter at the inner end of the hexagonal hole of the nut raw material. Of course, it can be achieved by hitting and deforming with a locking punch.

1 is a schematic flow chart according to the manufacturing method of the present invention,

Figure 2a is a process explanatory diagram schematically showing a discharge groove forming process as an embodiment of the present invention,

2b is a process explanatory diagram schematically showing a tapping process as an embodiment of the present invention;

3A is a process explanatory diagram schematically showing an anti-loosening thread forming process as an embodiment of the present invention;

Figure 3b is an enlarged cross-sectional view of the main portion comparing the shape of the thread of the nut raw material before and the rear anti-loosening nut before performing the loosening thread forming process of Figure 3a,

Figure 3c is an enlarged cross-sectional view showing the main part showing the state of the loosening nut prepared by Figure 3a,

4A is a process explanatory diagram schematically showing an anti-loosening thread forming process as another embodiment of the present invention;

Figure 4b is an enlarged cross-sectional view of the main portion comparing the shape of the thread between the nut raw material before and the rear anti-loosening nut before performing the anti-loosening thread forming process of Figure 4a,

Figure 4c is an enlarged cross-sectional view showing the main portion of the anti-loosening nut prepared by Figure 4a,

Figure 5a is a process explanatory diagram schematically showing a loosening thread forming process as another embodiment of the present invention,

Figure 5b is an enlarged cross-sectional view of the main portion comparing the form of the thread between the nut raw material before and the rear anti-loosening nut before performing the loosening thread forming process of Figure 5a,

Figure 5c is an enlarged cross-sectional view showing the main portion of the anti-loosening nut prepared by Figure 5a,

Figure 6a is a process explanatory diagram schematically showing a loosening thread forming process as another embodiment of the present invention,

Figure 6b is an enlarged cross-sectional view of the main portion comparing the form of the thread between the nut raw material before and the rear anti-loosening nut before performing the loosening thread forming process of Figure 6a,

Figure 6c is an enlarged cross-sectional view showing the main portion of the anti-loosening nut prepared by Figure 6a,

7A is an explanatory diagram showing a conventional cutting process;

Figure 7b is an explanatory diagram showing a conventional round molding process,

Figure 7c is an explanatory diagram showing a conventional hexagonal molding process,

7D is an explanatory diagram showing a conventional flange forming process;

7E is an explanatory diagram showing a conventional drilling process,

7F is an explanatory diagram showing a conventional tapping process.

* Description of the symbols for the main parts of the drawings *

10: discharge groove forming process 10a, 160: tapping process

11: discharge groove 12,12a, 112,122,132,142,152: nut raw material

13a, 166 thread 14: ejection groove mold

16: discharge groove punch pin 17: projection jaw

20,30,40,50: loosening thread forming process

22,32,42,52: Loosen nut

23,33,43,53: Deformed thread

26,36,56: locking punch 27: tapered deformation protrusion

37: parallel deformation protrusion 46: deformation roller

57: circular deformation projection 100: seated nut

110: cutting process 114: cutting machine

116: raw material 120: round molding process

124: rounding mold 126,136,146: punch

130: hexagonal molding process 133: hexagonal part

134: hexagonal mold 140: flange forming process

144: flange die 148: flange portion

149: locking step 150: drilling process

153: hole 154: punched mold

156: piercing pin 164: tapping mold

166: tapping means 170: coating film forming process

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

Figure 1 is a schematic flow chart according to the manufacturing method of the present invention, Figure 2a is a schematic view showing the process of forming the discharge groove as an embodiment of the present invention, Figure 2b is a tapping process as an embodiment of the present invention The process explanatory drawing which showed schematically.

The nut raw material 152 which passed through the drilling process 150 which forms the hole 153 in the inner center of the nut raw material 142 as it was moved by a conveying means (not shown), and was seated in the discharge groove mold 14 inside. Next, a nut raw material 12 having a discharge groove 11 formed in three directions on the inner circumference of the nut raw material 152 by being pressurized with a discharge groove boring pin 16 having a protruding jaw 17 protruding in three directions is manufactured. Through the discharge groove forming process (10).

The nut raw material 12 which has undergone the discharge groove forming process 10 is seated inside the tapping mold 164 to form the thread raw material 12a inside the life 153 by the tapping means 166. It goes through the tapping process 10a which manufactures.

FIG. 3A is a process explanatory view schematically showing an anti-loosening thread forming process as an embodiment of the present invention, wherein the nut raw material 12a undergoes the tapping step 10a after the discharge groove forming step 10 is a moving means (not shown). The locking punch 26 having the tapered deformation protrusion 27 which is moved as is and is seated on the mold (not shown) and tapered downward from the lower three parts is lowered and hatched on top of the nut raw material 12a. The anti-loosening nut 22 having the deformed thread 23 which shortens the distance between the thread 13a and the adjacent thread 13a by deforming the thread 13a positioned at the upper end of the nut raw material 12a while hitting the portion Manufacture.

At this time, since the tapered deformation protrusion 27 of the locking punch 26 hits the upper end of the hexagonal portion 133 of the nut raw material 12a from the outside to the inside, the hole 153 is narrowly deformed in three places of the hatched portion. The thread 13a is moved downward inward to form the deformed thread 23.

FIG. 3B is an enlarged cross-sectional view of main parts comparing the shape of the threads between the nut raw material and the rear anti-loosening nut before performing the anti-loosening thread forming process of FIG. 3A. The upper end of the nut raw material 12a and the thread 13a is a locking punch ( The loosening nut 22 having the first to third deformed threads 23 of the threads 13a is produced by the hitting of the tapered deformation protrusion 27 of FIG. 26.

The operator should set the hitting force of the locking punch 26 in advance, and operate with a force such that the first to third degree of the upper end thread 13a of the nut raw material 12a being hit is deformed.

Figure 3c is an enlarged cross-sectional view showing the main portion of the anti-loosening nut prepared by Figure 3a.

Figure 4a is a schematic diagram showing the process of the anti-loosening thread forming process according to another embodiment of the present invention, Figure 4b is a thread of the nut raw material and the subsequent anti-loosening nut before performing the loosening thread forming process of Figure 4a Fig. 4C is an enlarged cross-sectional view of the main part showing the shape of the anti-loosening nut manufactured by Fig. 4A.

The nut raw material 12a, which has undergone the discharge groove forming step 10 and the tapping step 10a, is seated on a mold (not shown) by a moving means (not shown) and the upper hexagonal portion 133 of the nut raw material 12a is seated. ) Is formed at the lower end of the locking punch 36 to be deformed by hitting the hatched portion from the parallel deformation projection 37 protruding long side by side in the longitudinal direction.

At this time, since the parallel deformation protrusion 37 of the locking punch 36 is formed to be inclined obliquely from the inside of the nut raw material 12a to the outside, the hexagonal portion 133 of the nut raw material 12a by the parallel deformation protrusion 37. ) The tip end is deformed from the outer upper part to the inner lower part so that the upper thread 13a of the nut raw material 12a hole 153 is prevented from loosening with the deformed thread 33 formed by two to four inner lower ends. Made of nut 32.

FIG. 5A is a schematic view illustrating a process of forming an anti-loosening thread according to still another embodiment of the present invention, and FIG. 5B is a thread of a nut material and a subsequent anti-loosening nut before performing the anti-loosening thread forming process of FIG. 5A. 5 is a enlarged cross-sectional view showing a main portion of the anti-loosening nut manufactured by FIG. 5A.

The nut raw material 12a, which has undergone the discharge groove forming step 10 and the tapping step 10a, is seated on a mold (not shown) by a moving means (not shown) and the upper hexagonal portion 133 of the nut raw material 12a is seated. ) Is to pass the tip of the hexagonal portion 133 of the nut raw material 12a between the two deformation rollers 46 rotated while maintaining a distance slightly smaller than the diameter of the hexagonal material 133 of the nut raw material 12a.

At this time, the tip portion of the hexagonal portion 133 of the nut raw material 12a passing through the two deformation rollers 46 is slightly crushed by the pushing force on both sides, so that the inner thread 13a of the nut raw material 12a is As both sides are pushed inward, about two to four threads 13a of the upper end are made of an anti-loosening nut 42 having a modified thread 43 formed in an elliptical shape.

Figure 6a is a schematic view showing a process of forming the anti-loosening thread in another embodiment of the present invention, Figure 6b is a screw thread of the nut raw material and the subsequent anti-loosening nut before performing the anti-loosening thread forming process of FIG. Fig. 6C is an enlarged cross-sectional view showing the main part of the anti-loosening nut manufactured by Fig. 6A.

The nut raw material 12a, which has undergone the discharge groove forming step 10 and the tapping step 10a, is seated on a mold (not shown) by a moving means (not shown) and the upper hexagonal portion 133 of the nut raw material 12a is seated. Hole 153 is deformed by being hit by a circular deformation protrusion 57 protruding in a circular shape slightly larger than the diameter of the hole 153 from the lower end of the locking punch 56.

At this time, the inner hole 153 of the hexagonal portion 133 of the nut raw material 12a that has been hit by the circular deformation protrusion 57 of the locking punch 56 is deformed downward while pushing the thread 13a downward. An anti-loosening nut 52 having a deformed thread 53 is produced in which one to three of the threads 13a of the deformed portion are deformed downward and the distance between the threads 13a and the adjacent thread 13a is narrower. .

Referring to the use state of the present invention as follows.

The manufacture of anti-loosening nuts 22, 33, 42, 52 is first made of a plurality of nut raw materials 112 using a cutter 114 having a dimension of approximately 11 mm of the raw material 116 extruded into a rod. The raw material cutting process 110, and the rounded molding process 120 for seating the cut nut raw material 112 inside the rounding mold 124 and then press the punch 126 to form a rounded bottom end, and the rounding process Hexagonal molding process in which the nut raw material 122, which has passed through 120, is rotated 180 ° from the top and the bottom thereof to be seated inside the hexagonal mold 134 and pressurized by the punch 136 to form the hexagonal section 133 having a hexagonal shape on the upper side. 130 and the upper and lower ends of the nut raw material 132 formed on the upper side thereof are rotated by 180 ° to be seated inside the flange mold 144 and pressured by a punch 146 to approximately 1 mm at the upper end of the nut raw material 142. Form a flange portion 148 of thickness and a plurality of hooks on top of the flange portion 148 The flange forming process 140 for forming the jaw 149 to protrude, and the nut material 142 having the flange 148 and the plurality of locking jaws 149 are seated on the inner side of the drilling mold 154 without rotation. And a drilling process 150 for drilling a hole 153 in the center side with a piercing pin (156).

The nut raw material 152 passed through the drilling process 150 has a plurality of discharge grooves inside the hole 153 by the discharge groove punching pin 16 having the protruding jaw 17 while passing through the discharge groove forming step 10. 11 is formed, and the thread 13a is formed in the hole 153 by the tapping means 166 while passing through the tapping step 10a.

The nut raw material 12a on which the thread 13a is formed is subjected to the anti-loosening thread forming process 20, 30, 40, 50, and the plurality of threads 13a of the upper end of the nut raw material 12a are deformed. Made of anti-loosening nuts 22, 32, 42, 52 with modified threads 23, 33, 43, 53 with narrower distances from 13a and adjacent threads 13a. .

A part of the upper end of the nut raw material 12a and the thread 13a is made of a loosening nut 22, 32, 42, 52 having a modified screw thread 23, 33, 43, 53. As soon as the coating film forming process 170, the anti-loosening nut 22, 32, 42, 52 that is not rusted or energized is completed.

When the anti-loosening nuts 22, 32, 42 and 52 with such a coating film are fastened to the threads (not shown) of the bolts (not shown) where the coating film is formed, the bolts of the bolts engaged with the undeformed threads 13a are loosened. Locking nuts 22, 32, 42, 52 are fastened well, and loosening nuts 22, 32, 42, 52 are formed with deformed threads 23, 33, 43, 53. When the upper end of the bolt is located at the tip of the loosening nut 22, 32, 42, 52 is no longer fastened.

At this time, the worker is to tighten the loosening nuts 22, 32, 42, 52 to the bolt while maintaining the force by using a force or a tool of T / Q 20 ~ 40kgf, at this time, The modified threads 23, 33, 43, 53 of the 22, 32, 42 and 52 complete the fastening while peeling off the coating of the bolt. The operator needs to ground the stripped part of the bolt.

These loosening nuts 22, 32, 42 and 52 are easily loosened by external impact because the deformed threads 23, 33, 43 and 53 of the upper end tighten the bolts firmly. It will continue to hold firmly without tightening.

As described above, the present invention has a low cost of use because the nut can perform its own anti-loosening function and there is no need for the anti-loosening washer, and it is simple without any additional work for removing the coating film for grounding. Since the bolt coating can be removed, the work efficiency is greatly improved.

Claims (5)

A cutting process 110 for cutting the raw material 116 into a plurality of nut raw materials 112, a round molding process 120 for pressing the punch 126 to form a rounded lower end, and a pressure tank by the punch 136. And a hexagonal molding process 130 in which the hexagonal portion 133 is formed, and pressurized by the punch 146 to form a flange portion 148 at the upper end, and a plurality of locking jaws 149 at the upper end of the flange portion 148. A flange forming step 140 to be formed, a drilling step 150 in which the hole 153 is drilled in the center by the piercing pin 156, and a tapping step 160 for forming the thread 162 in the hole 153. And a coating film forming step (170) for electrodeposition coating the paint; Through the punching process 150, the nut raw material 152 having the hole 153 formed at the center thereof is seated inside the discharge groove mold 14 as it is by a transfer means, and the discharge groove punch pin having a plurality of protruding jaws 17 ( 16 is a discharge groove forming process (10) for forming a plurality of discharge grooves (11) inside the hole 153 by the 16 and It further comprises an anti-loosening thread forming step of narrowing the distance between the thread 13a and the adjacent thread 13a by the thread deforming means of the thread 13a inside the upper end of the nut raw material 12a which has undergone the tapping process 10a. Method of manufacturing a loosening seated nut having a film removal function, characterized in that. The method of claim 1; The anti-loosening thread forming process by the thread deforming means seats the nut raw material 12a that has undergone the tapping process 10a into the mold as it is by the moving means and outwards three places on the upper end of the hexagonal portion 133 of the nut raw material 12a. Manufacture of anti-loosening seated nut with anti-film removal function characterized in that it is anti-loosening thread forming process (20) made by hitting and deforming with locking punch (26) having three tapered deformation protrusions (27) protruding obliquely downward. Way. The method of claim 1; The anti-loosening thread forming process by the thread deforming means seats the nut raw material 12a that has passed through the tapping step 10a into the mold as it is by the moving means, and the left and right sides of the upper end of the hexagonal portion 133 of the nut raw material 12a outward. A method of manufacturing a loosening seated nut with an anti-film removing function, characterized in that it is a loosening thread forming process 30 formed by hitting and deforming with a locking punch 36 having two parallel deformation protrusions 37 projecting downwardly obliquely. . The method of claim 1; The anti-loosening thread forming process by the thread deforming means is performed by placing the nut raw material 12a, which has undergone the tapping process 10a, into the mold as it is by the moving means and rotating the upper end of the hexagonal portion 133 of the nut raw material 12a. A method of manufacturing a loosening seated nut having a film removing function, characterized in that the loosening thread forming process (40) formed by passing through the deformation roller (46). The method of claim 1; The anti-loosening thread forming process by the thread deforming means mounts the nut raw material 12a, which has undergone the tapping step 10a, into the mold as it is by the moving means, and the inner end 153 of the hexagonal hole 133 of the nut raw material 12a. The anti-loosening thread forming process 50, which is formed by hitting and deforming with a locking punch 56 having a circular deformation protrusion 57 having a diameter slightly larger than the diameter of the hole 153, is characterized in that Manufacturing method of seated nut.