CN211951153U - Permanent anti-loose thread pair with barb type fine teeth on tooth type helical surface and manufacturing device - Google Patents
Permanent anti-loose thread pair with barb type fine teeth on tooth type helical surface and manufacturing device Download PDFInfo
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- CN211951153U CN211951153U CN202020066167.9U CN202020066167U CN211951153U CN 211951153 U CN211951153 U CN 211951153U CN 202020066167 U CN202020066167 U CN 202020066167U CN 211951153 U CN211951153 U CN 211951153U
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Abstract
The application discloses a permanent anti-loose thread pair with barb type fine teeth on a tooth type helical surface and a manufacturing device, wherein the anti-loose thread pair comprises an anti-loose bolt and an anti-loose nut, wherein the upper surface and the lower surface of the tooth type helical surface of the anti-loose bolt are respectively provided with first barb type fine teeth in an inclined shape along the trend of the tooth type helical surface, and the first barb type fine teeth are uniformly distributed; correspondingly: the upper surface of locknut's profile of tooth helicoid, the trend along the profile of tooth helicoid all process on the lower surface with the thin tooth of the thin tooth complex of first barb type second barb type, work as when locknut fastens on check bolt, the thin tooth of first barb type, the mutual interlock of the thin tooth of second barb type. This application only needs a locknut when carrying out locking fastening, can be suitable for the limited application occasion in space more to because the interlock structure of the thin tooth of barb type, make locknut can not become flexible, locking effect is better.
Description
Technical Field
The application relates to the field of mechanical design and manufacturing, in particular to a permanent anti-loosening thread pair with barb type fine teeth on a tooth type helical surface and a manufacturing device.
Background
When the threads are fastened and connected, locking plates, pins, torque lock nuts, nylon inserts, fuses or chemical glue bonding methods are often adopted, and even a plurality of nuts are screwed up and other anti-loosening measures are adopted to solve the problem of loosening of the threads, so that the time that the fasteners can be loosened automatically is delayed to a certain extent, but the problem is not solved fundamentally; the anti-loosening threaded fasteners commonly used at present are:
american clinch (spiralock) thread anti-loosening threads: the shabit thread form is a unique 30 degree wedge chamfer on its root. This bevel is made with special snap tools. When the Shibata nut is assembled, the crests of the external threads are tightly held against the 30 degree wedge of the Shibata threads, thus preventing any lateral movement of the threads relative to the box.
Japanese hadrock (hardlock) eccentric nut: two kinds of nuts having a "concave" shape and a "convex" shape are used for one bolt. The lower part of the nut is convex, the center is slightly deviated (eccentric processing) during processing, the nut plays a role of a wedge, and the upper nut and the lower nut are eccentric to generate transverse pressure of the nut on the bolt. The nut with the concave upper part does not perform machining (circular machining) deviating from the center, thereby forming the function of driving the wedge by the cone. The two nuts are combined into one, and the problem of looseness is solved.
Chinese Thangs thread: during connection, two nuts with different rotation directions (one left-handed nut and one right-handed nut are respectively adopted) are used: the nuts on the working bearing surfaces are called the fastening nuts and the nuts on the non-bearing surfaces are called the lock nuts. When in use, the fastening nut is firstly pre-tightened, and then the locking nut is pre-tightened.
However, these threaded fasteners have problems in use:
the contact of the male teeth/the female teeth of the American Shibiguo (spiralock) thread anti-loose thread is actually 30-degree wedge angle line contact, the area is small, the pressure is strong, and the requirement on the compression strength of the material is high; after the multi-time disassembly, the locking capability is weakened after the interference is reduced.
Although the eccentric nut of the japanese hardlock (hardlock) generates the nut to help the anti-loosening to the bolt lateral pressure, although the eccentricity is self-locking, the eccentric self-locking of the upper and lower nuts also has the anti-loosening problem when the impact vibration is large, namely, the eccentric self-locking of the upper and lower nuts is also loosened, so that the long-term maintenance of the lateral pressure cannot be guaranteed, and the anti-loosening nut is not particularly reliable. Two more nuts will also be more costly and not compact enough.
Chinese Thangs thread: the fastening nut is limited by the reverse direction of the locking nut, theoretically, the fastening nut cannot loosen, but loosening of the locking nut is not guaranteed. This down thread has problems in practical applications. The two nuts are also more costly, less compact, and have insufficient space on the field, allowing only one nut.
Disclosure of Invention
The application aims to provide a permanent anti-loosening thread pair with barb type fine teeth on a tooth type helical surface and a manufacturing device, so as to solve the problems existing in the existing anti-loosening thread fastener.
In order to realize the task, the following technical scheme is adopted in the application:
a permanent anti-loose thread pair with barb type fine teeth on a tooth type helicoid comprises an anti-loose bolt and an anti-loose nut, wherein:
inclined first barb type fine teeth are machined on the upper surface and the lower surface of the tooth type spiral surface of the anti-loosening bolt along the trend of the tooth type spiral surface, and the first barb type fine teeth are uniformly distributed; correspondingly:
the upper surface of locknut's profile of tooth helicoid, the trend along the profile of tooth helicoid all process on the lower surface with the thin tooth of the thin tooth complex of first barb type second barb type, work as when locknut fastens on check bolt, the thin tooth of first barb type, the mutual interlock of the thin tooth of second barb type.
Further, the first barb type fine teeth on the upper surface and the lower surface of the tooth type helicoid of the anti-loose bolt are in the same direction, correspondingly:
the orientation of the second barb type fine teeth on the upper surface and the lower surface of the tooth type screw surface of the locknut is the same, but is opposite to the orientation of the corresponding first barb type fine teeth.
Further, the intersection angle alpha of the side surface of the gullet of the first barb type fine tooth and the second barb type fine tooth and the tooth type screw surface is 85-90 degrees, the vertex angle beta of the first barb type fine tooth and the second barb type fine tooth is 60 degrees, and the top line of the first barb type fine tooth and the second barb type fine tooth is perpendicular to the edge line of the tooth type screw surface.
A manufacturing device of a check bolt comprises a clamping driving device and a rolling device;
the clamping driving device comprises a driving motor, a clamping chuck and an ejector pin, wherein the clamping chuck and the ejector pin are used for clamping and fixing the bolt to be processed; the driving motor is used for driving the clamping chuck to drive the bolt to rotate;
the rolling device comprises a support, rolling wheels and a mandrel, wherein the support is provided with a pair of shaft holes, sliding sleeves are assembled in the shaft holes, and the mandrel penetrates through the sliding sleeves in the pair of shaft holes and is in clearance fit with the sliding sleeves; the diameter of the rolling wheel is gradually reduced from the middle part to the edge, and fine tooth dies for processing first barb type fine teeth on the upper surface and the lower surface of a tooth type helical surface of the anti-loose bolt are respectively arranged on the edges of two side surfaces of the rolling wheel; the rolling wheel is mounted on the mandrel through a mandrel hole, and the support is mounted on a driving table capable of moving in a direction close to or far away from the clamping driving device.
Further, the mandrel is provided with a shaft shoulder and a positioning groove outside the shaft hole, the shaft hole of the rolling wheel is provided with a key groove, the mandrel is arranged on the mandrel through the matching of a rectangular key, the positioning groove and the key groove, and the position of the mandrel is fixed through a clamping ring and the shaft shoulder.
A method of manufacturing a lockbolt comprising:
installing the bolt to be processed on a clamping driving device, enabling a clamping chuck to clamp and fix one end of the bolt to be processed, enabling the tip of an ejector pin to be abutted against the other end of the bolt to be processed, and adjusting to enable the bolt to be processed to be coaxial with the ejector pin;
moving the support through the driving table to enable the rolling wheel to be close to the bolt to be machined, adjusting the position of the rolling wheel through the axially moving mandrel, enabling the edges of two side surfaces of the rolling wheel to be in contact with the upper surface and the lower surface of the tooth-shaped spiral surface of the bolt to be machined simultaneously and exerting pressure, and then fixing the driving table;
opening a driving motor, driving a clamping chuck to drive a bolt to be processed to rotate towards one direction, and enabling a rolling wheel to move axially in the rotation process of the bolt to be processed due to the fact that the side face of the rolling wheel is in pressure contact with the surface to be processed, and enabling a fine tooth die on the side face of the rolling wheel to form first barb type fine teeth on the upper surface and the lower surface of a tooth type spiral surface;
after the rolling wheel moves to the end of the tooth-shaped helical surface, adjusting the driving motor to reversely drive the bolt to be processed to rotate, at the moment, reversing the rolling wheel, returning along the original track, and rolling the first barb-shaped fine tooth once again;
and driving the bolt to be processed to rotate forwards and backwards for multiple times, so that the anti-loosening bolt is obtained after all surfaces to be processed of the tooth-shaped spiral surface of the bolt to be processed are processed.
A manufacturing device of a locknut comprises an electrolysis device, a fixing clamp, a limiting mould and a processing mould;
the limiting die comprises a pair of insulating nuts, and the processing die comprises a check bolt with a tooth-shaped helical surface provided with first barb-shaped fine teeth; the major diameter of the internal thread of the insulating nut is consistent with that of the external thread of the anti-loosening bolt, and the major diameter of the internal thread of the nut to be processed is larger than that of the external thread of the anti-loosening bolt;
the pair of insulating nuts are symmetrically provided with a flow guide hole and a flow guide groove, wherein the flow guide hole axially penetrates through the insulating nuts, and the flow guide groove is arranged on the side surface of the insulating nuts and is communicated with the flow guide hole;
the fixing clamp is used for fixing the nut to be processed between the pair of insulating nuts.
Furthermore, the fixing clamp comprises a concave fixing clamp piece, and a fastening bolt is arranged on the fixing clamp piece.
A method of manufacturing a locknut comprising:
coaxially fixing the nut to be processed between the pair of insulating nuts by using a fixing clamp, and enabling the side surface of the pair of insulating nuts where the guide grooves are located to be close to the nut to be processed;
twist the mold processing through rotatory mode, make and treat the nut of processing, insulating nut all twists on the screw thread of mold processing, then through treating the nut of processing, the mold processing connects electrolytic device respectively and circular telegram, utilize water conservancy diversion hole, guiding gutter to let in electrolyte in the clearance between the tooth type helicoid of treating nut of processing and mold processing to on duplicating the tooth type helicoid of treating the nut of processing with the thin tooth of first barb type on the mold processing, form the thin tooth of second barb type, obtain lock nut.
Furthermore, the electrolysis device comprises a direct-current power supply, a liquid collecting tank and a liquid pump, wherein electrolyte is filled in the liquid collecting tank;
the direct current power supply adopts a transistor adjustable power supply, the voltage of the transistor adjustable power supply is 5-15V and is continuously adjustable, the current value is 500-1000A and is continuously adjustable, the nut to be processed is connected to the positive pole of the direct current power supply, and the processing mold is connected to the negative pole of the direct current power supply; the electrolyte is a passivation electrolyte.
The application has the following technical characteristics:
1. compact structure
Only one barb type tooth-shaped nut is used, and compared with Japanese handleck and Chinese Thangson threads, the nut is one less nut, so that the nut is more suitable for occasions with limited space.
2. Permanent anti-loosening effect
The barb type only allows the nut to move in the tightening direction and the nut cannot back out, i.e. loosen.
3. Saving material
Compared with Japanese handlelock and Chinese Down's screw, the screw thread saves materials, and has better detachability, namely more times of recycling, than the United states sprialock.
4. Reduce machining and assembly and disassembly time
The single nut has less machining time than two nuts and is easier to install.
Drawings
FIG. 1 is a schematic view of a lockbolt and a locknut in cooperation;
FIG. 2 is a schematic cross-sectional structure view of a matching portion of a first barb type fine tooth and a second barb type fine tooth on a tooth type helical surface when the locknut is assembled on the lockbolt;
FIG. 3 is a schematic diagram showing the distribution structure of the first barb-type fine teeth on the upper and lower surfaces of the tooth-type helicoid of the check bolt;
FIG. 4 is a schematic structural view of a manufacturing apparatus for a check bolt;
fig. 5 is a schematic structural view of a manufacturing apparatus of the locknut.
The reference numbers in the figures illustrate: 1 lockbolt, 2 locknut, 3 spacer bushes, 4 lockbolt's tooth type helicoid, 41 upper surfaces, 42 lower surfaces, 5 first barb type fine tooth, 6 second barb type fine tooth, 7 edge line, 8 wait to process the bolt, 9 centre gripping chuck, 10 thimble, 11 dabber, 12 sliding sleeves, 13 rectangular key, 14 supports, 15 rand, 16 rolling wheel, 17 fine tooth mould, 18 drive stages, 19 processing mould, 20 wait to process the nut, 21 insulating nut, 22 mounting fixture, 23 fastening bolt, 24 water conservancy diversion hole, 25 guiding gutter.
Detailed Description
The first aspect of the present application provides a permanent lock thread pair with barb-type fine teeth on a thread-type helicoid, as shown in fig. 1 to 3, comprising a lock bolt 1 and a lock nut 2, wherein:
first barb type fine teeth 5 are machined on the upper surface and the lower surface of the tooth type spiral surface of the anti-loosening bolt 1 along the trend of the tooth type spiral surface, and the first barb type fine teeth 5 are uniformly distributed; correspondingly:
the trend along the profile of tooth helicoid on the upper surface of locknut 2's profile of tooth helicoid, the lower surface all process have with the thin tooth 6 of the thin tooth 5 complex of first barb type second barb type works as when locknut 2 fastens on lockbolt 1, the thin tooth 5 of first barb type, the thin tooth 6 mutual interlock of second barb type.
The utility model provides a check thread and locknut 2 all can form through processing on the basis of the bolt that has paired each other, nut, specifically, processing has the thin tooth of first barb type 5, the thin tooth of second barb type 6 of mutually supporting on locknut 2, lockthread's the profile of tooth helicoid 4. The thread-shaped helicoid is a helicoid formed by processing external threads and internal threads in the screw direction of the bolt and the nut, and the upper surface and the lower surface of the thread-shaped helicoid use an edge line 7 of the thread-shaped helicoid (the edge line 7 is also an outermost spiral line on the bolt) as a boundary line. First barb type fine tooth 5 in this application, second barb type fine tooth 6 distribute simultaneously on the upper surface of tooth type helicoid, lower surface, evenly lay. The first barb type fine tooth 5 and the second barb type fine tooth 6 are both inclined teeth on the surface of the tooth type helical surface and have an inclined sawtooth structure when viewed from the side.
After the locknut 2 is screwed on the lockbolt 1, the first barb type fine tooth 5 and the second barb type fine tooth 6 are engaged with each other, as shown in fig. 2. Because the first barb type fine tooth 5 and the second barb type fine tooth 6 are both in an inclined structure, when the locknut 2 moves towards the screwing direction of the lockbolt 1, the first barb type fine tooth 5 and the second barb type fine tooth 6 can slide relatively; and once the locknut 2 reaches the tightening position, the bolt can not rotate towards the loosening direction due to the occlusion between the first barb type fine teeth 5 and the second barb type fine teeth 6, namely the locknut 2 is only allowed to be tightened along the axial direction but can not be loosened under the matching of the first barb type fine teeth 5 and the second barb type fine teeth 6. Referring to fig. 2, a cross-sectional structure diagram of a matching portion of the first barb type fine tooth 5 and the second barb type fine tooth 6 is shown. In this example, if the locknut 2 rotates clockwise, it moves downward, the second barb type fine tooth 6 on it inclines to the right, the first barb type fine tooth 5 inclines to the left, so that relative sliding can occur between the fine teeth when rotating clockwise; when the locknut 2 rotates anticlockwise, the thin teeth are fastened, so that the barb-shaped inclined plane of the spirally-expanded surface of the locknut 2 forcibly slides downwards and is fastened with the barb-shaped inclined plane of the lockbolt 1 in the opposite direction, the locknut cannot back up under the conditions of strong impact and vibration, and the locknut is never loosened. Referring to fig. 1, a schematic diagram of the locknut 2 locking after the lockbolt 1 passes through the hole on the spacer 3, at this time, the locknut 2 can not be detached any more.
Referring to fig. 3, since the thread-shaped screw surfaces on the lockbolt 1 and the locknut 2 move in opposite directions when the lockbolt 1 and the locknut are relatively screwed or unscrewed, the first barb-shaped fine teeth 5 on the upper surface and the lower surface of the thread-shaped screw surfaces of the lockbolt 1 face the same direction, correspondingly: the second barb type fine teeth 6 on the upper and lower surfaces of the tooth type screw surface of the locknut 2 are in the same orientation, but are opposite to the corresponding first barb type fine teeth 5. In the example of fig. 2, the first barb-type fine tooth 5 on the upper and lower surfaces of the thread-type helicoid of the lockbolt 1 is inclined leftward (leftward).
Fig. 3 is a schematic diagram showing the distribution structure of the first barb type fine teeth 5 on the upper surface 41 and the lower surface 42 of the tooth type helicoid 4 of the check bolt 1; referring to fig. 2 and 3, in a specific embodiment, the intersection angle α of the side surfaces of the sulcus of the first and second barbed fine teeth 5 and 6 and the tooth-shaped helical surface is 85 to 90 °, the vertex angle β of the first and second barbed fine teeth 5 and 6 is 60 °, and the vertex lines of the first and second barbed fine teeth 5 and 6 are perpendicular to the edge line 7 of the tooth-shaped helical surface. In addition, the small diameter of the anti-loose bolt 1 is provided with a thin rectangular groove, which is convenient for cutter back-off when the production line is used for rolling and processing thin teeth. Thus, good buckling and locking effects can be ensured, and the first barb type fine teeth 5 can be conveniently manufactured. The depth of the fine teeth of the first barb type fine teeth 5 is about 1/10 of the screw pitch, and the distribution interval of the fine teeth is 1/3 of the screw pitch. The arrangement structure of the second barb-type fine teeth 6 of the nut corresponds to the first barb-type fine teeth 5, and the fine teeth face to the right in the embodiment.
According to a second aspect of the present application, there is provided a manufacturing apparatus of a lockbolt 1, as shown in fig. 4, comprising a clamping driving device and a rolling device; the clamping driving device comprises a driving motor, a clamping chuck 9 and an ejector pin 10, wherein the clamping chuck 9 and the ejector pin 10 are used for clamping and fixing the bolt 8 to be processed; the driving motor is used for driving the clamping chuck 9 to drive the bolt to rotate. Wherein, the clamping chuck 9 is provided with a plurality of clamping jaws which can clamp the end part of the bolt 8 to be processed. The clamping chuck 9, the thimble 10 and the bolt 8 to be processed are coaxially arranged.
The rolling device comprises a support 14, a rolling wheel 16 and a spool 11, wherein the support 14 is of a concave structure, a pair of shaft holes are formed in the support 14, a sliding sleeve 12 is assembled in the shaft holes, and the spool 11 penetrates through the sliding sleeve 12 in the pair of shaft holes and is in clearance fit with the sliding sleeve 12; the diameter of the rolling wheel 16 is gradually reduced from the middle part to the edge, and fine tooth dies 17 used for processing first barb type fine teeth 5 on the upper surface and the lower surface of the tooth type helical surface of the anti-loose bolt 1 are respectively arranged on the edges of two side surfaces of the rolling wheel 16; this fine tooth mold 17 is used for cutting the tooth profile helicoid to form the protruding first barb type fine tooth 5 when processing, and the concrete shape of tooth profile mold can be designed according to the shape of first barb type fine tooth 5 that needs. The stitching wheel 16 is mounted on the bobbin 11 via its axial bore, and the carriage 14 is mounted on a drive table 18 which can be moved in a direction towards and away from the clamping drive.
Preferably, the bobbin 11 has a margin outside the shaft hole, that is, the length of the bobbin 11 is greater than the width of the bracket 14, so that after the bobbin 11 passes through the shaft hole of the bracket 14, a section of the bobbin 11 is left on both sides of the bracket 14 to meet the sliding requirement during the processing. The spool 11 is provided with a shaft shoulder and a positioning groove, the shaft center hole of the rolling wheel 16 is provided with a key groove, the spool 11 is installed on the spool 11 through the matching of the rectangular key 13, the positioning groove and the key groove, and the position of the spool 11 is fixed through the clamping ring 15 and the shaft shoulder. The sliding sleeve 12 is in clearance fit with the spool 11, lubricating grease can be added into the sliding sleeve 12 to reduce friction and abrasion during operation, and the sliding sleeve 12 allows the spool 11 to drive the rolling wheel 16 to rotate or move axially; the rolling wheels 16 and the sliding sleeve 12 are made of hard alloy materials.
In a third aspect, the present application provides a method for manufacturing a lockbolt 1, including:
and 3, opening a driving motor, driving the clamping chuck 9 to drive the bolt 8 to be processed to rotate towards one direction, wherein the rolling wheel 16 moves along the axial direction in the rotating process of the bolt 8 to be processed due to the pressure contact of the side surface of the rolling wheel 16 with the surface to be processed, and meanwhile, the fine tooth dies 17 on the side surface of the rolling wheel 16 form first barb type fine teeth 5 on the upper surface and the lower surface of the tooth type spiral surface. The pressure contact means that the fine tooth mold 17 on the side surface of the rolling wheel 16 is in contact with the upper surface or the lower surface of the tooth-shaped spiral surface to be processed and continuously applies pressure, so that the fine tooth mold 17 bites into the tooth-shaped spiral surface to be processed to a depth, when the bolt 8 to be processed rotates, the fine tooth mold 17 is in pressure contact with the rolling wheel 16, on one hand, the fine tooth mold 17 is processed on the tooth-shaped spiral surface to form the first barb-shaped fine tooth 5 through cutting, and on the other hand, the rolling wheel 16 is driven to rotate and simultaneously axially move together with the bobbin 11 under the action of friction force. Specifically, the bolt 8 to be processed makes one rotation, and the rolling wheel 16 moves by the length of one thread pitch.
And 4, after the rolling wheel 16 moves to the end of the tooth-shaped spiral surface, adjusting the driving motor to reversely drive the bolt 8 to be processed to rotate, at the moment, reversely rotating the rolling wheel 16, returning along the original track, and rolling the first barb-shaped fine tooth once again to deepen the fine tooth.
And 5, driving the bolt 8 to be processed to rotate forwards and backwards for multiple times, and obtaining the anti-loosening bolt 1 after all the surfaces to be processed of the tooth-shaped spiral surface of the bolt 8 to be processed are processed.
The rolling processing mode belongs to chipless processing, and the surface of a workpiece generates compressive stress, so that the method is beneficial to improving the comprehensive mechanical property of the workpiece. The hard alloy adopted by the rolling wheel 16 has the characteristics of high hardness, good wear resistance and the like, and the rolling wheel 16 and the fine tooth die 17 on the rolling wheel can be formed by adopting a die of a powder metallurgy process or processed by adopting a fine electric spark process to ensure.
For the locknut 2 mentioned in the present embodiment, if the size of the nut 20 to be processed is large, for example, the major diameter of the thread is larger than M30, the manufacturing device and principle of the locknut 2 described above can also be used to complete the processing of the second barb-type fine tooth 6; while internal threads having a major diameter less than M30 are limited to the stiffness of the rolling tool, the present application further provides a machining apparatus, as described below.
According to a fourth aspect of the present application, there is provided a manufacturing apparatus of a locknut 2, as shown in fig. 5, comprising an electrolysis apparatus, a fixing jig 22, a limiting mold, and a processing mold 19.
The fixing clamp 22 comprises a concave fixing clamp, a fastening bolt 23 is arranged on the fixing clamp, and the bolt in the fixing clamp is fixed by rotating the fastening bolt 23.
The limiting die comprises a pair of insulating nuts 21, wherein in the embodiment, the insulating nuts 21 are nylon nuts; the processing mould 19 comprises a check bolt 1 with a tooth-shaped helical surface provided with a first barb-shaped fine tooth 5; the major diameter of the internal thread of the insulating nut 21 is consistent with the major diameter of the external thread of the anti-loosening bolt 1, so that the insulating nut 21 can be screwed on the processing die 19, and the major diameter of the internal thread of the nut 20 to be processed is larger than the major diameter of the external thread of the anti-loosening bolt 1; so that a certain gap is left between the nut 20 to be processed and the processing bolt after the nut is screwed on the processing bolt. The fixing jig 22 is used to fix the nut 20 to be processed between the pair of insulating nuts 21. Specifically, the diameter of the internal thread of the nut 20 to be machined is 2 greater than the diameter of the external thread of the lockbolt 1, so that the gap is formed for electrolytic machining. Preferably, the value is 0.1-0.3 mm. The insulating nut 21 is not conductive, and short circuit can be avoided.
The pair of insulation nuts 21 are symmetrically provided with a diversion hole 24 and a diversion trench 25, wherein the diversion hole 24 axially penetrates through the insulation nut 21, and the diversion trench 25 is arranged on the side surface of the insulation nut 21 and communicated with the diversion hole 24; the flow guide hole 24 of one of the insulating nuts 21 serves as a liquid inlet, and the flow guide hole 24 of the other insulating nut 21 serves as a liquid outlet, as shown in fig. 5.
On the basis of the above technical solution, according to a fifth aspect of the present application, there is provided a method for manufacturing a locknut 2 by an electrolytic method using the manufacturing apparatus according to the fourth aspect, including:
And 2, screwing the processing mold 19 (cathode) in a rotating mode, so that the nut 20 to be processed and the insulating nut 21 are screwed on the thread of the processing mold 19. The insulating nut 21 is made of nylon, so that the inner thread of the insulating nut is of a soft structure, and the first barb type fine teeth 5 on the surface of the processing die 19 cannot be damaged when the insulating nut rotates on the processing die 19; in addition, the first barb type fine thread 5 is not provided on the external thread at the position of the insulation nut 21 at both ends of the surface of the processing die 19.
And 3, respectively connecting the nut 20 to be processed and the processing mold 19 with an electrolysis device and electrifying. The electrolysis device comprises a direct current power supply, a liquid collection tank and a liquid pump, wherein electrolyte is filled in the liquid collection tank; the direct current power supply adopts a transistor adjustable power supply, the voltage of the transistor adjustable power supply is 5-15V and can be continuously adjusted, and the current value is 500-E
1000A and continuously adjustable, the nut 20 to be processed is connected to the positive pole of the direct current power supply, and the processing mould 19 is connected to the negative pole of the direct current power supply; the electrolyte is a passivation electrolyte.
The method comprises the following steps of introducing electrolyte into a gap between a nut 20 to be processed and a tooth-shaped spiral surface of a processing mold 19 by utilizing a flow guide hole 24 and a flow guide groove 25, wherein the specific flow path comprises a liquid collecting tank, a liquid inlet, a right flow guide groove 25 shown in figure 5, a gap between the nut 20 to be processed and the processing mold 19, a left flow guide groove 25, a liquid outlet and the liquid collecting tank, so that a first barb-shaped fine tooth 5 on the processing mold 19 is reversely copied onto the tooth-shaped spiral surface of the nut 20 to be processed to form a second barb-shaped fine tooth 6, and the locknut 2 is obtained; then, the insulating nut 21 at the end (left end) is unscrewed, and the processed locknut 2 is removed. Because the major diameter, the middle diameter and the minor diameter of the nut 20 to be processed are all larger than those of the processing mold 19, the gap between the major diameter, the middle diameter and the minor diameter can be used for generating the second inverted-sharp-teeth 6 on one hand, and on the other hand, the fine teeth cannot be mutually occluded and influenced when the locknut 2 is finally taken down.
The locknut 2 processing thinking of this application is to adopt electrochemical machining's mode reverse replication (negative and positive complementation) to wait to process the nut with the thin tooth of barb type on the lockbolt 1 on, wherein wait to process the nut 20 and be connected with the DC power supply positive pole and become the positive pole, and the mold processing 19 is connected with the DC power supply negative pole, becomes the negative pole. In this example, the processing mold 19 is made of red copper, and the electrolyte is NaNO3The passivation type electrolyte ensures the processing precision. The electrolyte was driven at a pressure of about 1MPa using a liquid pump so that the electrolyte circulated through the gap, completing the electrolytic processing. The electrolytic machining efficiency is extremely high, almost no cutting force is generated, no burrs or sharp edges are generated, the machining time is about 5 seconds, and the machining die 19 (cathode) 27 is never worn in the electrolytic machining and can be used for a long time. Of course, toThe nut with the thread major diameter larger than M30 can also adopt the electrolytic machining of the scheme to finish the machining of the barb type fine teeth.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (8)
1. The utility model provides a permanent locking screw thread pair that has thin tooth of barb type on tooth type helicoid which characterized in that, includes check bolt (1) and locknut (2), wherein:
inclined first barb type fine teeth (5) are machined on the upper surface and the lower surface of the tooth type spiral surface of the anti-loosening bolt (1) along the trend of the tooth type spiral surface, and the first barb type fine teeth (5) are uniformly distributed; correspondingly:
the trend along the profile of tooth helicoid on the upper surface of the profile of tooth helicoid of lock nut (2), the lower surface all processed with the thin tooth of first barb type (5) complex second barb type (6), work as when lock nut (2) fastening is on check bolt (1), the thin tooth of first barb type (5), the mutual interlock of the thin tooth of second barb type (6).
2. Permanent locking thread pairing with barbed type fine teeth on the thread form helicoid according to claim 1, characterized in that the first barbed type fine teeth (5) on the upper and lower surfaces of the thread form helicoid of the locking bolt (1) are oriented the same, correspondingly:
the orientation of the second barb type fine teeth (6) on the upper surface and the lower surface of the tooth type screw surface of the locknut (2) is the same, but is opposite to the orientation of the corresponding first barb type fine teeth (5).
3. The permanent anti-loose thread pair with the barb type fine teeth on the tooth type helical surface according to claim 1, wherein the intersection angle alpha between the side surface of the tooth groove of the first barb type fine tooth (5) and the second barb type fine tooth (6) and the tooth type helical surface is 85-90 degrees, the vertex angle beta of the first barb type fine tooth (5) and the second barb type fine tooth (6) is 60 degrees, and the vertex line of the first barb type fine tooth (5) and the second barb type fine tooth (6) is vertical to the edge line (7) of the tooth type helical surface.
4. The manufacturing device of the check bolt is characterized by comprising a clamping driving device and a rolling device;
the clamping driving device comprises a driving motor, a clamping chuck (9) and an ejector pin (10), wherein the clamping chuck (9) and the ejector pin (10) are used for clamping and fixing a bolt (8) to be machined; the driving motor is used for driving the clamping chuck (9) to drive the bolt to rotate;
the rolling device comprises a support (14), rolling wheels (16) and a spool (11), wherein a pair of shaft holes are formed in the support (14), sliding sleeves (12) are assembled in the shaft holes, and the spool (11) penetrates through the sliding sleeves (12) in the pair of shaft holes and is in clearance fit with the sliding sleeves (12); the diameter of the rolling wheel (16) is gradually reduced from the middle part to the edge, and fine tooth dies (17) used for processing first barb type fine teeth (5) on the upper surface and the lower surface of the tooth type helical surface of the anti-loose bolt (1) are respectively arranged on the edges of two side surfaces of the rolling wheel (16); the rolling wheel (16) is mounted on the spool (11) through its axial bore, and the carriage (14) is mounted on a drive table (18) which can be moved in a direction towards or away from the clamping drive.
5. The manufacturing device of the anti-loose bolt is characterized in that the spool (11) is provided with a margin outside the shaft hole, a shaft shoulder and a positioning groove are arranged on the spool (11), a key groove is arranged in the shaft hole of the rolling wheel (16), the spool (11) is installed on the spool (11) through the matching of the rectangular key (13) and the positioning groove and the key groove, and the position of the spool (11) is fixed through the clamping ring (15) and the shaft shoulder.
6. The manufacturing device of the locknut is characterized by comprising an electrolysis device, a fixing clamp (22), a limiting mould and a processing mould (19);
the limiting die comprises a pair of insulating nuts (21), and the processing die (19) comprises a check bolt (1) with a tooth-shaped helical surface provided with a first barb-shaped fine tooth (5); the major diameter of the internal thread of the insulating nut (21) is consistent with the major diameter of the external thread of the anti-loosening bolt (1), and the major diameter of the internal thread of the nut (20) to be processed is larger than the major diameter of the external thread of the anti-loosening bolt (1);
the pair of insulating nuts (21) are symmetrically provided with a diversion hole (24) and a diversion trench (25), wherein the diversion hole (24) axially penetrates through the insulating nut (21), and the diversion trench (25) is arranged on the side surface of the insulating nut (21) and communicated with the diversion hole (24);
the fixing clamp (22) is used for fixing the nut (20) to be processed between the pair of insulating nuts (21).
7. The manufacturing device of the locknut according to claim 6, characterized in that the fixing clamp (22) comprises a concave fixing clip on which a fastening bolt (23) is arranged.
8. The manufacturing device of the locknut as claimed in claim 6, wherein the electrolysis device comprises a direct current power supply, a liquid collecting tank and a liquid pump, the liquid collecting tank is filled with electrolyte;
the direct current power supply adopts a transistor adjustable power supply, the voltage of the transistor adjustable power supply is 5-15V and is continuously adjustable, the current value is 500-1000A and is continuously adjustable, a nut (20) to be processed is connected to the anode of the direct current power supply, and a processing mold (19) is connected to the cathode of the direct current power supply; the electrolyte is a passivation electrolyte.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020066167.9U CN211951153U (en) | 2020-01-13 | 2020-01-13 | Permanent anti-loose thread pair with barb type fine teeth on tooth type helical surface and manufacturing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020066167.9U CN211951153U (en) | 2020-01-13 | 2020-01-13 | Permanent anti-loose thread pair with barb type fine teeth on tooth type helical surface and manufacturing device |
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| CN211951153U true CN211951153U (en) | 2020-11-17 |
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| CN202020066167.9U Expired - Fee Related CN211951153U (en) | 2020-01-13 | 2020-01-13 | Permanent anti-loose thread pair with barb type fine teeth on tooth type helical surface and manufacturing device |
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| CN (1) | CN211951153U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111120497A (en) * | 2020-01-13 | 2020-05-08 | 广东轻工职业技术学院 | Permanent anti-loose thread pair with barb type fine teeth on tooth type helical surface and manufacturing device |
-
2020
- 2020-01-13 CN CN202020066167.9U patent/CN211951153U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111120497A (en) * | 2020-01-13 | 2020-05-08 | 广东轻工职业技术学院 | Permanent anti-loose thread pair with barb type fine teeth on tooth type helical surface and manufacturing device |
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Granted publication date: 20201117 Termination date: 20220113 |