CN112916773A - Manufacturing method of composite tooth shape of blind rivet - Google Patents
Manufacturing method of composite tooth shape of blind rivet Download PDFInfo
- Publication number
- CN112916773A CN112916773A CN202110091440.2A CN202110091440A CN112916773A CN 112916773 A CN112916773 A CN 112916773A CN 202110091440 A CN202110091440 A CN 202110091440A CN 112916773 A CN112916773 A CN 112916773A
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- Prior art keywords
- rivet
- section
- tooth
- locking screw
- thread
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000002131 composite material Substances 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000005520 cutting process Methods 0.000 claims abstract description 26
- 238000005096 rolling process Methods 0.000 claims abstract description 22
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 15
- 238000007493 shaping process Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000001125 extrusion Methods 0.000 claims abstract description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 2
- 230000008901 benefit Effects 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004904 shortening Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H3/00—Making helical bodies or bodies having parts of helical shape
- B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
- B21H3/06—Making by means of profiled members other than rolls, e.g. reciprocating flat dies or jaws, moved longitudinally or curvilinearly with respect to each other
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses a method for manufacturing a composite tooth shape of a pull rivet in the field of rivets. The manufacturing method of the composite tooth form of the pull rivet comprises the following steps that firstly, when the rivet enters a feeding end to start rolling during thread rolling, a S2 tooth plate firstly extrudes a rod part to gradually form a smaller groove, and simultaneously metal extruded by a middle tail cutting groove is filled to a shortened length locking screw thread section through radial extrusion of the tooth plate; secondly, the rivet rod continues to roll, the upper and lower tooth plates of S1 and S3 begin to extrude the rod, and the smooth plane section of S1 shapes the metal filled in the locking screw thread section to reach the same middle diameter of the locking screw thread section; thirdly, repeatedly extruding and shaping the rod part by three sections of dental plates, and forming a required dental form under the limitation of a dental plate mould; fourthly, the rivet rod part is separated from the stripping end to form a finished product. The invention has low production cost and high efficiency, and reduces the difficulty of equipment adjustment.
Description
Technical Field
The invention relates to the technical field of rivets, in particular to a manufacturing method of a composite tooth form of a pull rivet.
Background
The snap-off rivet is mainly applied to the field of fastening connection of high-strength components (among steel, aluminum alloy and stainless steel) with holes, and the existing snap-off rivet mainly has British system 5-grade strength and corresponding metric system 8.8-grade strength according to the characteristics of the existing snap-off rivet. The 10.9-grade rivet is in the relatively blank field, and the main reason is that the thread structure of the rivet is obviously different from that of the current 8.8-grade rivet, and the existing 8.8-grade rivet manufacturing process cannot meet the requirements, particularly the manufacturing cost and the efficiency cannot meet the requirements.
Therefore, the 10.9-grade blind rivet thread-making process must introduce a new thread-making process and method, and how to effectively solve the problem of inconvenience in thread rolling, so as to ensure the thread rolling efficiency of the rivet, which is a technical problem urgently needed to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a manufacturing method of a composite tooth form of a blind rivet, which has low production cost and high efficiency and reduces the difficulty of equipment adjustment.
In order to achieve the purpose, the manufacturing method of the composite tooth form of the blind rivet adopts the following technical scheme:
the utility model provides a compound tooth form mould of rivet pulling, includes the thread rolling mould that a set of symmetry set up, but two thread rolling moulds relative sliding, the last helical structure locking screw thread, middle part groove and the afterbody draw-groove of cutting of having set gradually of thread rolling mould. By arranging the spiral locking screw thread, a shaft collar matched with the spiral locking screw thread can be fixed on the rivet in advance before installation, and meanwhile, the relative position of the shaft collar and the rivet can be adjusted according to the thickness of the clamping plate to finish primary pre-tightening; through setting up the groove of cutting the tail in the middle part, according to the equal principle of metal plastic deformation volume, shorten the shaping pitch diameter length of spiral locking screw thread 1 to 2.5 tooth intervals, the metal of squeezing the groove of cutting the tail in the middle part is filled the length locking screw thread section of shortening through the radial extrusion of filament plate.
The invention further improves the composite tooth-shaped die for the blind rivet, and the three tooth plates of the spiral locking screw thread, the middle tail cutting groove and the tail pulling groove are manufactured in a split manner, so that the material cost is effectively saved and the processing difficulty is reduced in the manufacturing process. The method is divided into S1, S2 and S3. S1\ S2\ S3, which is integrally divided into a feeding section, a middle shaping section and a discharging section. The middle shaping section is flat and straight, the feeding leading-in angle is alpha, the discharging stripping angle is beta, and alpha is more than beta and less than 10 degrees. The screw thread die used in a split mode has the advantages that the position with large deformation is larger, the stress of the screw plate is larger, the abrasion is larger, and the replacement frequency is higher. The advantage is therefore that the wearing parts are less expensive to replace after wear. In the embodiment, the S2 feature corresponding to the tail cutting groove is more easily damaged, and only the S2 needs to be replaced after the tail cutting groove is damaged, so that the whole tail cutting groove needs to be replaced completely. Therefore, the cost is lower, and the maintenance is more convenient.
The invention further improves the composite tooth-shaped die for the pull rivet, wherein the helix angle of the helical locking screw thread is 1.5-3 degrees, and meanwhile, a smooth plane section is processed at the feeding section, so that the rod shaping effect can be achieved, burrs of a product after thread rolling are reduced, and the shaft collar is convenient to screw in.
The manufacturing method of the composite tooth form of the blind rivet by adopting the composite tooth form die of the blind rivet comprises the following steps:
firstly, when a rivet enters a feeding end to start rolling during thread rolling, an S2 thread plate firstly extrudes a rod part to gradually form a smaller groove, and simultaneously metal extruded by a middle tail cutting groove is filled to a shortened length locking thread section through radial extrusion of the thread plate;
secondly, the rivet rod continues to roll, the upper and lower tooth plates of S1 and S3 begin to extrude the rod, and the smooth plane section of S1 shapes the metal filled in the locking screw thread section to reach the same middle diameter of the locking screw thread section;
thirdly, repeatedly extruding and shaping the rod part by the three tooth plates, and forming a required tooth shape under the limitation of a tooth plate mould;
fourthly, the rivet rod part is separated from the stripping end to form a finished product.
Compared with the prior art, the invention has the beneficial effects that:
1. through setting up spiral locking screw thread, can fix in advance on the rivet with its supporting shaft collar before the installation, can accomplish preliminary pretension according to the relative position with the rivet of the thick adjusting collar of centre gripping board simultaneously.
2. Through setting up the groove of cutting the tail in the middle part, according to the equal principle of metal plastic deformation volume, shorten the shaping pitch diameter length of spiral locking screw thread 1 to 2.5 tooth intervals, the metal of squeezing the groove of cutting the tail in the middle part is filled the length locking screw thread section of shortening through the radial extrusion of filament plate. The smooth plane section shapes the filling metal, reduces burrs of the product after thread rolling, and facilitates the screwing in of the shaft collar.
3. The screw thread die used in a split mode has the advantages that the position with large deformation is larger, the stress of the screw plate is larger, the abrasion is larger, and the replacement frequency is higher. The advantage is therefore that the wearing parts are less expensive to replace after wear. In the embodiment, the S2 feature corresponding to the tail cutting groove is more easily damaged, and only the S2 needs to be replaced after the tail cutting groove is damaged, so that the whole tail cutting groove needs to be replaced completely. Therefore, the cost is lower, and the maintenance is more convenient.
Drawings
FIG. 1 is a schematic view of a 8.8-level rivet structure;
FIG. 2 is a schematic structural view of a novel rivet of grade 10.9;
FIG. 3 is a schematic view of the movement of the thread rolling die;
FIG. 4 is a schematic structural view of a novel movable die tooth plate;
fig. 5 is a schematic structural view of a novel fixed die dental plate.
The screw thread comprises 1 rivet, 2 spiral locking screw threads, 2 and 3 tail cutting grooves, 4 tail pulling grooves, 5 feeding sections, 6 middle plastic sections, 7 stripping sections, 8 movable die tooth plates and 9 fixed die tooth plates.
Detailed Description
The present invention is further illustrated by the following detailed description, which is to be construed as merely illustrative and not limitative of the remainder of the disclosure, and modifications and variations such as those ordinarily skilled in the art are intended to be included within the scope of the present invention as defined in the appended claims.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "vertical", "peripheral surface" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or the element to which the present invention is directed must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the term "vertical" or the like does not imply that the components are required to be absolutely horizontal or overhanging, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 2-5, a composite tooth-shaped die for a blind rivet 1 comprises a group of symmetrically arranged thread rolling dies, the two thread rolling dies can slide relatively and are divided into a movable die tooth plate 8 and a fixed die tooth plate 9, and a spiral locking thread 2, a middle tail cutting groove 3 and a tail pull groove 4 are sequentially arranged on the thread rolling dies. By arranging the screw locking screw thread 2, a shaft collar matched with the screw locking screw thread can be fixed on the rivet 1 in advance before installation, and meanwhile, the relative position of the shaft collar and the rivet 1 can be adjusted according to the thickness of the clamping plate to finish primary pre-tightening; through setting up the groove 3 of cutting the tail in the middle part, according to the equal principle of metal plastic deformation volume, shorten the shaping pitch diameter length of spiral locking screw thread 2 1 to 2.5 tooth intervals, the metal of extruding middle part groove 3 of cutting the tail fills the length locking screw thread section of shortening through the radial extrusion of filament plate.
Specifically, the screw locking thread 2, the middle tail cutting groove 3 and the tail pulling groove 4 are manufactured in a split mode. The method is divided into S1, S2 and S3. S1\ S2\ S3, which is integrally divided into a feeding section 5, a middle shaping section 6 and a discharging section. The middle shaping section 6 is flat and straight, the feeding leading-in angle is alpha, the discharging stripping angle is beta, and alpha is more than beta and less than 10 degrees. The screw thread die used in a split mode has the advantages that the position with large deformation is larger, the stress of the screw plate is larger, the abrasion is larger, and the replacement frequency is higher. The advantage is therefore that the wearing parts are less expensive to replace after wear. In the embodiment, the corresponding S2 feature of the tail cutting groove 3 is more easily damaged, and only the S2 needs to be replaced after the tail cutting groove is damaged, so that the whole tail cutting groove is required to be replaced completely. Therefore, the cost is lower, and the maintenance is more convenient.
Specifically, the helix angle of the helical locking screw thread 2 is 1.5 to 3 degrees.
The specific working process and principle of the invention are as follows: during thread rolling, when the rivet 1 enters the feeding end 5 and begins to roll, the S2 tooth plate firstly extrudes the rod part to gradually form a smaller groove, and meanwhile, metal extruded by the middle tail cutting groove 3 is filled into a shortened length locking thread section through radial extrusion of the tooth plate. As the rod part continues to roll, the upper tooth plate and the lower tooth plate of S1 and S3 start to extrude the rod part, and the smooth plane section of S1 shapes the metal filled in the locking screw thread section to reach the same middle diameter of the locking screw thread section. Repeatedly extruding the rod part at the middle shaping section 6, forming a required tooth form under the limitation of a tooth plate die, and finally dropping a finished product by the material dropping section 7.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
It should be noted that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching the disclosure of the present specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions of the present invention, so that the present invention has no technical essence, and any structural modification, ratio relationship change, or size adjustment should still fall within the range covered by the technical contents disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
Claims (4)
1. The utility model provides a compound tooth form mould of blind rivet which characterized in that: the thread rolling die comprises a group of thread rolling dies which are symmetrically arranged, the two thread rolling dies can slide relatively, and a screw structure locking screw thread, a middle tail cutting groove and a tail pull groove are sequentially arranged on the thread rolling dies.
2. A composite dental form die for blind rivets according to claim 1, characterized in that: the screw locking screw thread, the middle tail cutting groove and the tail pulling groove are manufactured in a split mode. The method is divided into S1, S2 and S3. S1\ S2\ S3, which is integrally divided into a feeding section, a middle shaping section and a discharging section. The middle shaping section is flat and straight, the feeding leading-in angle is alpha, the discharging stripping angle is beta, and alpha is more than beta and less than 10 degrees.
3. A composite dental form die for blind rivets according to claim 1, characterized in that: the helix angle of the locking screw thread is 1.5-3 degrees.
4. A method for manufacturing a composite tooth form by using the blind rivet according to claims 1 to 3, which is characterized in that: the method comprises the following steps:
firstly, when a rivet enters a feeding end to start rolling during thread rolling, an S2 thread plate firstly extrudes a rod part to gradually form a smaller groove, and simultaneously metal extruded by a middle tail cutting groove is filled to a shortened length locking thread section through radial extrusion of the thread plate;
secondly, the rivet rod continues to roll, the upper and lower tooth plates of S1 and S3 begin to extrude the rod, and the smooth plane section of S1 shapes the metal filled in the locking screw thread section to reach the same middle diameter of the locking screw thread section;
thirdly, repeatedly extruding and shaping the rod part by the three tooth plates, and forming a required tooth shape under the limitation of a tooth plate mould;
fourthly, the rivet rod part is separated from the stripping end to form a finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110091440.2A CN112916773A (en) | 2021-01-23 | 2021-01-23 | Manufacturing method of composite tooth shape of blind rivet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110091440.2A CN112916773A (en) | 2021-01-23 | 2021-01-23 | Manufacturing method of composite tooth shape of blind rivet |
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| Publication Number | Publication Date |
|---|---|
| CN112916773A true CN112916773A (en) | 2021-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110091440.2A Pending CN112916773A (en) | 2021-01-23 | 2021-01-23 | Manufacturing method of composite tooth shape of blind rivet |
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| CN208900501U (en) * | 2018-07-09 | 2019-05-24 | 卓越紧固系统（上海）有限公司 | A kind of locking tool of check bolt and check bolt |
| CN209062055U (en) * | 2018-08-22 | 2019-07-05 | 东莞市亚新精密五金科技有限公司 | A kind of shockproof pulling rivet bolt teeth scrubbing plate |
| CN111085639A (en) * | 2020-01-19 | 2020-05-01 | 宾科汽车紧固件（昆山）有限公司 | Forming mechanism and method for threads |
| CN111185549A (en) * | 2020-01-13 | 2020-05-22 | 浙江中原万楹螺纹科技有限公司 | Thread rolling plate and thread rolling process using same |
| CN211938867U (en) * | 2019-12-05 | 2020-11-17 | 海盐精斌五金制品有限公司 | Ring groove rivet and screw integrated forming dental plate die |
-
2021
- 2021-01-23 CN CN202110091440.2A patent/CN112916773A/en active Pending
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| FR2151543A5 (en) * | 1971-09-02 | 1973-04-20 | Tokai Cold Forming Co Ltd | |
| JPS558360A (en) * | 1978-07-03 | 1980-01-21 | Matsumoto Jukogyo Kk | Corrugation bolt and production thereof |
| EP0313927A1 (en) * | 1987-10-28 | 1989-05-03 | RICHARD BERGNER GMBH & CO | Waisted shankbolt with centring band |
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Application publication date: 20210608 |