TW201707813A - Anti-loosen screw manufacturing method and screw member produced thereby - Google Patents

Abstract

A screw includes a shank, an outer thread portion and at least one laterally-extruded thread portion. The shank has an outer circular surface on which to form the outer thread portion by a thread-rolling process. The outer thread portion includes a plurality of grooves. One of the grooves of the outer thread portion is extruded to form the laterally-extruded thread portion by the thread-rolling process. Two corresponding thread surfaces of two adjacent threads of the laterally-extruded thread portion are extruded to widen a width of the corresponding groove such that two opposite thread surfaces of two adjacent threads are bulged to form laterally-extruded thread surfaces of the two adjacent threads of the laterally-extruded thread portion.

Description

Anti-loose bolt manufacturing method and bolt component thereof

The present invention relates to an anti-loosen bolt manufacturing method and a bolt element thereof; and more particularly to a method for manufacturing a detachable bolt using a laterally-extruded thread portion and It is made of bolt elements.

A conventional bolt structure is disclosed in "Anchor bolt with an outer thread having thread turns with a different cross-sectional shape", which discloses a fixing bolt or an anchor bolt. The fixing bolt has a cylindrical stem and at least one thread formed on the cylindrical screw. The thread extends a longitudinal extent from a free front end.

The thread has a plurality of thread turns and increases along a distance from the free front end to the threaded ring, and at least one third of the screw thread of the cylindrical screw The width of the tooth is reduced, so that the distance of the width of the groove between the trailing flank and the leading flank of one of the two threaded rings is increased inversely.

Although the threaded thread ring is configured to be unequal in width or unequal groove width, it is only used to enhance its overall screwing or anchoring strength, and it is only suitable for use on related building components. In fact, the unequal tooth width or the unequal groove width of the threaded thread ring of the thread cannot effectively prevent it. The problem of loosening or falling off after locking.

Another conventional screw construction, such as the new patent of the "screw thread improved structure" of the Republic of China Patent Publication No. TW-475670, discloses a screw structure. The screw comprises a screw head, a screw body and a plurality of diagonal threads. The diagonal thread extension is disposed on the screw body. In addition, one section of the diagonal thread is set as an arcuate wavy thread at a certain distance from the screw head.

The wavy thread extends over the twill thread to form the twill thread that is biased adjacent thereto. When the lock is engaged, the screw is snapped into a screw hole by the tight locking of the wavy thread. In this way, the screw is preferably securely locked to prevent the screw from being improperly loosened after the locking, or even accidentally falling off.

In fact, although the wavy thread extends to form a diagonally threaded thread that provides a tightly threaded function, it has the disadvantage of being complicated in construction. That is, the wavy thread must be a single thread to shape the single wavy thread toward the adjacent regular ruled thread. In addition, the wavy thread is additionally formed on the twill thread, but it has the disadvantage of practical processing difficulties in the thread-rolling process.

In other words, the conventional bolt construction and its method of manufacture necessarily entail the need to provide a potential need to prevent mechanical loosening after closure. The above-mentioned U.S. Patent No. 6,454,506 and the U.S. Patent Publication No. TW-475, 670

In view of the above, in order to meet the above technical problems and needs, the present invention provides a method for manufacturing a loose bolt and a bolt member thereof, which utilizes a thread rolling process to form an external thread portion and at least one on a screw. The side squeezing the screw portion, so as to form two side protrusions (a pair of side protrusions) on the two sides of the side pressing screw portion corresponding to the adjacent two grooves, so as to use the two sides to protrude The part is screwed into an internal thread to improve the snail The bolt [screw] component does not raise the problem of mechanical looseness.

The main object of the present invention is to provide a method for manufacturing a detachable bolt and a bolt member thereof, which utilizes a thread rolling process to form an external thread portion on one screw and at least one side to press the screw portion. Pressing the two side protrusions (a pair of side protrusions) on the two sides of the side pressing screw portion corresponding to the adjacent two grooves, so that the two side protrusions are used for screwing and snapping an internal thread In order to achieve the purpose of lifting the bolt [screw] component to prevent mechanical loosening.

In order to achieve the above object, a bolt manufacturing method according to a preferred embodiment of the present invention comprises: combining a main tooth plate and a bump plate to form a composite dental plate; and using the main dental plate to perform a screw rolling process. The screw is rolled to form an externally threaded portion, and the externally threaded portion includes a plurality of grooves; and the groove of the external thread is laterally squeezed and expanded by the protruding plate on the thread rolling process to At least one or several side-extruded thread portions are formed.

In the preferred embodiment of the present invention, the side pressing screw portion is formed by pressing and forming two side protrusions on two opposite sides of the side of the side pressing screw portion.

In the preferred embodiment of the present invention, the plurality of side pressing screw portions form an angle with respect to the longitudinal axis of the screw.

The included angle of the preferred embodiment of the invention is 180°, 120°, 90°, 72° or 60°.

In a preferred embodiment of the invention, the screw is selected from a bolt blank, and the bolt blank is heat treated to form a surface heat treatment layer.

In addition, the bolt component of the preferred embodiment of the present invention comprises: a screw having an outer ring surface; An external thread portion formed on the outer ring surface of the screw by a screw rolling process, and the external thread portion includes a plurality of grooves; and at least one side presses the screw portion, and the thread is rolled at the thread Rolling the groove of the external thread portion laterally to form the side pressing screw portion; wherein the side pressing screw portion is laterally extruded to expand the side pressing screw portion Two threaded teeth on both sides.

In the preferred embodiment of the present invention, the side pressing screw portion is formed by pressing and forming two side protrusions on two opposite sides of the side of the side pressing screw portion.

In the preferred embodiment of the present invention, the plurality of side pressing screw portions form an angle with respect to the longitudinal axis of the screw.

The included angle of the preferred embodiment of the invention is 180°, 120°, 90°, 72° or 60°.

In a preferred embodiment of the invention, the screw is selected from a bolt blank, and the bolt blank is heat treated to form a surface heat treatment layer.

1‧‧‧Bolt head

10‧‧‧ screw

2‧‧‧External thread

21‧‧‧ thread

22‧‧‧ Groove

22a‧‧‧ Groove

22b‧‧‧ Groove

3‧‧‧ Side extrusion screw

31a‧‧‧Side bulge

31b‧‧‧Side bulge

4‧‧‧ internal thread

5‧‧‧Composite dental plate

50‧‧‧Bumps

51‧‧‧Main dental board

52‧‧‧Bump plate

100‧‧‧Bolt blanks

101‧‧‧ Surface heat treatment layer

Fig. 1 is a flow chart showing a method of manufacturing a detachable bolt according to a preferred embodiment of the present invention.

Fig. 2 is a front elevational view showing the anti-loose bolt member of the first preferred embodiment of the present invention.

Fig. 3 is a side elevational view showing the threaded internal thread of the anti-loose bolt member of the first preferred embodiment of the present invention.

Fig. 3A is a side elevational view showing a partially enlarged internal thread of the anti-loose bolt member of the first preferred embodiment of the present invention.

Fig. 4 is a perspective view showing the manufacturing method of the anti-loose bolt according to the preferred embodiment of the present invention using a combination of a main plate and a bump plate.

Figure 5: shows the anti-loose bolt element of the second preferred embodiment of the present invention intention.

Fig. 6 is a flow chart showing a method of manufacturing a detachable bolt according to a third preferred embodiment of the present invention.

Figure 7 is a side elevational view of the anti-loose bolt member of the third preferred embodiment of the present invention.

In order to fully understand the present invention, the preferred embodiments of the present invention are described in detail below, and are not intended to limit the invention.

The bolt manufacturing method and the bolt manufacturing device thereof according to the preferred embodiment of the present invention are suitable for producing various bolts and screws, such as hexagonal head bolts, square head bolts, and round head bolts. 〕, countersunk head bolt, T bolt, U bolt, stud bolt, eye bolt, anchor bolt 〕, machine screw, self tapping screw, hexagonal and hexagon socket screw, shoulder screw or Sems screw, but It is not intended to limit the scope of application of the invention. The bolt manufacturing method and the manufacturing bolt component thereof according to the preferred embodiment of the present invention are suitable for producing various production standards, such as: international standard (ISO), American system (ANSI), Japanese system (JIS), German system (DIN), and British system (BSW). And the like, but it is not intended to limit the scope of the invention.

The anti-loose bolt member of the preferred embodiment of the present invention is selected from various composite materials, various metal or metal alloy materials, such as magnesium, various magnesium alloys, aluminum, and various aluminum alloys. Alloy, low carbon steel, medium carbon steel, alloy steel, copper, various stainless steel or other metals and their metal alloys.

Fig. 1 is a flow chart showing a method of manufacturing a detachable bolt according to a preferred embodiment of the present invention. Please refer to FIG. 1, the present invention is better. The method for manufacturing the anti-loose bolt of the embodiment mainly comprises three process steps S1 to S3, and the operation steps are appropriately omitted or added without changing the operation method of the present invention, or the sequence before and after the operation step is adjusted.

Fig. 2 is a front elevational view showing the anti-loose bolt member of the first preferred embodiment of the present invention. Fig. 3 is a side elevational view showing the screwing internal thread of the anti-loose bolt member of the first preferred embodiment of the present invention. Fig. 3A is a side elevational view showing a partially enlarged internal thread of the anti-loose bolt member of the first preferred embodiment of the present invention. Furthermore, Figures 2 to 3A show the bolt (or screw) element and the technical features of the steps of its adoption only in an appropriate scale and shape.

Referring to Figures 2 to 3A, the anti-loose bolt member of the first preferred embodiment of the present invention comprises a bolt head 1, a bolt shank 10, and an outer thread portion. 2) and at least one side of the screw portion 3 (such as the screw enlarged portion of Fig. 2). The screw 10 has an outer circular surface formed on the outer ring surface of the screw 10, and the external thread portion 2 includes a plurality of threads 21 and a plurality of grooves. 〕twenty two.

For example, in the preferred embodiment of the present invention, the head of the bolt head 1 can be made into a cheese head, a binding head, a pan head, a truss head, and a F. A flat head, an oval head, a hexagon head, a hexagon washer head, a pan washer head, etc., but are not intended to limit the scope of the invention. In addition, in the preferred embodiment of the present invention, the groove type of the bolt head 1 can be formed into a slotted type, a Phillips recess type, a square socket type, and a hexagonal type. 〕, indented hexagon type, slotted & square socket type, slotted & Phillips combination type, plane hexagon type Word slot [H Type], TX tamper resistant type, slotted type, TX type, and PZ drive type, etc., but are not intended to limit the scope of the present invention.

Referring to FIGS. 2 to 3A again, for example, the side pressing screw portion 3 is formed by pressing to form the two side convex portions 31a and 31b, and the two side protruding portions 31a and 31b are formed on the side. Two sides of the pressing screw portion 3 correspond to the two adjacent grooves 22a and 22b, and the two side protruding portions 31a and 31b protrude (or deform displacement) in opposite directions to two sides to the two grooves. In 22a and 22b, the two directions as shown in Fig. 3A are opposite to the direction of the arrow. When the bolt member is locked, the two side protrusions 31a and 31b of the side pressing screw portion 3 abut against the two threads of an internal thread 4 (threaded hole or nut) to prevent generation. Suddenly loose.

Fig. 4 is a perspective view showing the manufacturing method of the anti-loose bolt according to the preferred embodiment of the present invention using a combination of a main plate and a bump plate. Referring to Figures 1, 2, 3, 3A and 4, the bolt manufacturing method of the first preferred embodiment of the present invention includes a first process step S1: first, for example, a main tooth plate 51 and A bump plate 52 is connected in series to form a complex threading die plate 5, and the bump plate 52 has a bump portion 50, as shown on the right side of FIG. 4, or is selected as a cylindrical push. And a combination of holes (not shown) combined with one of the bump plates 52. Alternatively, the bump plate 52 is selected to be coupled to the main tooth plate 51 to form the composite dental plate 5.

Referring to FIGS. 1, 2, 3, 3A and 4, the bolt manufacturing method of the first preferred embodiment of the present invention includes a second process step S2: then, the main tooth is utilized on a thread rolling process. The plate 51 is suitably mechanically rolled to form the externally threaded portion 2, and the externally threaded portion 2 includes a plurality of normal threads 21 and a plurality of normal grooves 22.

For example, in the preferred embodiment of the present invention, a single thread and a double tooth are formed on the screw 10 to form a self-tapping screw. Thread], high-low thread or tri-lobular thread, etc., but it is not intended to limit the scope of the present invention.

Referring to FIGS. 1, 2, 3, 3A and 4, the bolt manufacturing method of the first preferred embodiment of the present invention includes a third process step S3: at the same time, the bump is used on the thread rolling process. The lug portion 50 of the plate 52 laterally mechanically expands and expands both sides of the groove 22 of one of the male thread portions 2 to form at least one or a plurality of the side pressing screw portions 3.

Fig. 5 is a view showing the detachment prevention bolt member of the second preferred embodiment of the present invention. Referring to FIG. 5, with respect to the first embodiment, any two of the four side pressing screw portions 3 of the second preferred embodiment are formed with respect to the longitudinal axis [center] of the screw 10. An angle or a right angle (ie 90°). In another preferred embodiment of the present invention, the angle is selected to be 180°, 120°, 72° or 60°, that is, the number of the side pressing screw portions 3 is selected to be two, three, five or six. .

Fig. 6 is a flow chart showing a method of manufacturing a detachable bolt according to a third preferred embodiment of the present invention. Fig. 7 is a side elevational view showing the anti-loose bolt member of the third preferred embodiment of the present invention, which corresponds to Fig. 6. Referring to Figures 4, 6 and 7, the method of manufacturing the anti-loose bolt according to the third preferred embodiment of the present invention comprises the pre-processing step of providing a bolt blank 100. The bolt blank 100 comprises a magnesium wire, a magnesium rod, a magnesium ingot, an aluminum wire, an aluminum rod or an aluminum ingot. For example, the magnesium wire, magnesium rod or magnesium ingot is made of a magnesium alloy, and the magnesium wire or magnesium rod has an appropriate diameter to form a magnesium screw element. Also, the aluminum wire, aluminum rod or aluminum ingot is made of an aluminum alloy, and the aluminum wire or aluminum rod has an appropriate diameter to form a bolt member.

Referring to Figures 4, 6 and 7, the method for manufacturing the detachable bolt according to the third preferred embodiment of the present invention includes another pre-processing step: then, the bolt blank 100 is heat-treated to form at least one Or a plurality of thermal treatment layers 101, as shown in FIG. The dotted line is shown. For example, the magnesium or aluminum blank 1 is appropriately placed in a heating unit (for example, a heating mold), or the bolt blank 100 is fed through a heater so that the bolt blank 100 is The heat treatment is performed at a predetermined temperature. The predetermined temperature of the preferred embodiment of the present invention is between 100 ° C and 300 ° C, and the operating temperature of the bolt blank 100 is maintained at the predetermined temperature during the process, but it is not intended to limit the scope of the present invention.

Referring to Figures 4, 6 and 7, the method for manufacturing the anti-loose bolt according to the third preferred embodiment of the present invention comprises: subsequently, the bolt blank 100 and the surface heat treatment layer 101 are performed by the process steps S1 to S3. Processing is performed to form a finished bolt component, and the surface heat treatment layer 101 enhances the mechanical properties of the bolt blank 100. For example, the processing is selected to be a cold forging process or a warm forging process.

Referring to FIGS. 4, 6 and 7, for example, in the processing, the screw heading machine or the mold selection is selected on the bolt blank 100 and the surface heat treatment layer 101. The bolt head 1 is formed in a single or plural forming step. In the preferred embodiment of the present invention, the bolt blank 100 is formed into a bolt head 1 by a predetermined end of the bolt blank 100 in a head-forging manner when the bolt head 1 is formed.

Referring to FIGS. 4, 6 and 7, again, in the execution process step S3, for example, during the processing, a thread rolling machine may be used on the bolt blank 100 or The mold is selected to form the male threaded portion 2 in a single or multiple forming step. In the bolt blank 100 of the preferred embodiment of the present invention, the external thread portion 2 is formed on the bolt blank 100 by a thread-rolling manner when the external thread portion 2 is molded. The finished part of the bolt component.

In another preferred embodiment of the present invention, the bolt manufacturing method first heat-treats and forges the bolt blank 100 to form a first Surface heat treatment layer and an initial forging screw blank. In the subsequent process, the first surface heat treatment layer can improve the mechanical properties of the initial forging screw blank.

Then, the initial forging screw blank and the first surface heat treatment layer are subjected to heat treatment and forging treatment to form a second surface heat treatment layer on the finished bolt component, and the first surface heat treatment layer and the second surface heat treatment layer are lifted. The mechanical properties of the finished bolt component. A plurality of surface heat treatment layers may be repeatedly formed on the finished bolt component according to different process requirements.

For example, the first surface heat treatment layer and the second surface heat treatment layer are respectively selected to have different thicknesses and greater than the screw height according to different mechanical property requirements. According to different forging processes, the first surface heat treatment layer and the second surface heat treatment layer are respectively selected to have different hardnesses to improve the process flexibility and speed.

The foregoing preferred embodiments are merely illustrative of the invention and the technical features thereof, and the techniques of the embodiments can be carried out with various substantial equivalent modifications and/or alternatives; therefore, the scope of the invention is subject to the appended claims. The scope defined by the scope shall prevail. The copyright limitation of this case is used for the purpose of patent application in the Republic of China.

10‧‧‧ screw

2‧‧‧External thread

21‧‧‧ thread

22‧‧‧ Groove

22a‧‧‧ Groove

22b‧‧‧ Groove

3‧‧‧ Side extrusion screw

31a‧‧‧Side bulge

31b‧‧‧Side bulge

Claims (10)

A method for manufacturing a bolt, comprising: combining a main tooth plate and a bump plate to form a composite tooth plate; and rolling a screw into an external thread portion by using the main tooth plate on a thread rolling process; And the external thread portion includes a plurality of grooves; and the groove plate is used to laterally expand and expand one of the grooves of the external thread portion to form at least one or several sides on the thread rolling process Squeeze the thread. The method for manufacturing a bolt according to the first aspect of the invention, wherein the side pressing screw portion is pressed to form two side protrusions on the two sides of the side pressing screw portion corresponding to the two adjacent grooves. on. The method of manufacturing a bolt according to claim 1, wherein a plurality of the side pressing screw portions form an angle with respect to a longitudinal axis of the screw. The method of manufacturing a bolt according to claim 3, wherein the included angle is 180°, 120°, 90°, 72° or 60°. The bolt manufacturing method according to claim 1, wherein the screw is selected from a bolt blank, and the bolt blank is heat-treated to form a surface heat treatment layer. A bolt component comprising: a screw having an outer ring surface; an external thread portion formed on a surface of the outer ring of the screw by a thread rolling process, and the external thread portion includes a plurality of grooves And at least one side of the screw portion, which laterally presses and expands one of the grooves of the external thread portion to form the side pressing screw portion; wherein the side is pressed The thread portion is laterally squeezed to expand the corresponding two thread on both sides of the side pressing screw portion. The bolt component according to claim 6 , wherein the side pressing screw portion is pressed to form two side protrusions on both sides of the screw body on the side Corresponding to two adjacent grooves. A bolt member according to claim 6 wherein a plurality of the side pressing screw portions form an angle with respect to a longitudinal axis of the screw. The bolt element according to item 8 of the patent application, wherein the angle is 180°, 120°, 90°, 72° or 60°. The bolt element according to claim 6, wherein the screw is selected from a bolt blank, and the bolt blank is heat treated to form a surface heat treatment layer.