CN216324864U - Thread rolling die for manufacturing narrow snapping groove ring groove rivet - Google Patents
Thread rolling die for manufacturing narrow snapping groove ring groove rivet Download PDFInfo
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- CN216324864U CN216324864U CN202122788390.1U CN202122788390U CN216324864U CN 216324864 U CN216324864 U CN 216324864U CN 202122788390 U CN202122788390 U CN 202122788390U CN 216324864 U CN216324864 U CN 216324864U
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Abstract
The utility model discloses a thread rolling die for manufacturing a narrow snapping groove ring groove rivet. The screw thread plate forming machine comprises an integral structure, a locking groove, a breaking groove and a tail part groove-drawing screw thread plate, wherein the locking groove, the breaking groove and the tail part groove-drawing screw thread plate are transversely arranged; the longitudinal middle part of the thread rolling surface of the lead-in section of the thread rolling plate of the stretch breaking groove is provided with a thread rolling tooth of the stretch breaking groove, the height and width ratio of the thread rolling tooth is 0.5 to 0.75, thread rolling grooves are arranged on the thread rolling surfaces at two sides of the thread rolling tooth, and the shaping section consists of a front section bottom diameter shaping section and a rear section outer diameter shaping section; the thread rolling teeth of the utility model are beneficial to cutting into workpieces, have enough strength and are suitable for thread rolling of various alloys; and a groove material containing structure lower than the wire twisting surface is adopted to temporarily contain and extrude excess materials, so that the forming of the stretch-breaking groove is more stable, and a plurality of materials remained in the groove are gradually compressed back to the stretch-breaking groove by a subsequently arranged pressing plate structure, so that the stretch-breaking groove with extremely narrow width is formed. The thread rolling die has good processing performance and stability, the strength of the tool meets the requirement, and the processing efficiency is greatly improved.
Description
Technical Field
The utility model belongs to the technical field of processing of a fastener rivet, relates to a rivet processing die technology, and particularly relates to a thread rolling die for manufacturing a narrow snap groove ring groove rivet.
Background
At present, the ring groove rivet is widely applied to various industries, and some special connecting piece ring groove rivets for high-speed rail aviation are more narrow and smaller than those of common ring groove rivets, and generally require that the width of the snap groove is about 0.5mm or even narrower, and the design structure same as that of a common rivet thread rolling die can cause that the die for manufacturing the snap groove is not high in strength and is easy to damage; therefore, the conventional narrow snap groove ring groove rivet is generally processed by a machining mode to process the snap groove.
The existing conventional screw plate with the breaking groove is directly designed into a screw plate structure with the breaking groove according to the shape of the breaking groove, and because the screw plate is thin and similar to a sheet structure, when a product is pressed in, a unit area bears extremely large pressure, and the screw plate is extremely easy to damage under the working condition of thread rolling debugging. The production efficiency of the equipment is improved relative to manual operation, but the production efficiency is still greatly different compared with thread rolling, and the speed of processing the snapping grooves by using a single device is not more than 10 pieces per minute.
Aiming at a narrow snap groove ring groove rivet, in particular to a thread rolling die of a ring groove rivet with a narrow snap groove, under the condition of ensuring the width and the bottom diameter size of the ring groove, in order to meet the service life requirement and carry out batch thread rolling production, save the manufacturing cost and improve the production efficiency, new research and design on the structure of the thread rolling die are needed.
Disclosure of Invention
The utility model discloses a thread rolling die for manufacturing a narrow snapping groove ring groove rivet according to the defects of the prior art. The utility model aims to provide a thread rolling die which is high in strength, good in stability and suitable for machining narrow snap groove ring groove rivets.
The utility model is realized by the following technical scheme:
a thread rolling die for manufacturing a narrow stretch-breaking groove ring groove rivet comprises an integral structure, a locking groove thread rolling plate, a stretch-breaking groove thread rolling plate and a tail stretch-breaking groove thread rolling plate which are transversely arranged, wherein each thread rolling plate of the thread rolling die is sequentially provided with a leading-in section, a shaping section and a stripping section from the front end to the rear end; the method is characterized in that:
the longitudinal middle part of the thread rolling surface of the lead-in section of the thread rolling plate with the stretch breaking groove is provided with thread rolling teeth with the stretch breaking groove, the cross section of the thread rolling teeth with the stretch breaking groove is of a triangular structure, and the included angle between two sides of the triangle and the vertical wall of the thread rolling plate with the stretch breaking groove is not more than 45 degrees; thread rolling grooves are formed in the thread rolling surfaces of the thread rolling plates of the stretch-breaking grooves on the two sides of the thread rolling teeth; the leading-in section is obliquely arranged from the front end to the rear end, the angle of the inclination angle of the leading-in section is not more than 2 degrees, and the thread rolling teeth and the thread rolling grooves which form the leading-in section are gradually increased relative to the thread rolling surface from the front end to the rear end;
the shaping section of the breaking groove screw plate consists of a front section bottom diameter shaping section and a rear section outer diameter shaping section; the bottom diameter shaping section has the same structure as the connecting part at the rear end of the guide-in section of the snapping groove screw plate; the outer diameter shaping section comprises a transition section and a plane section, the front end of the transition section and the tail end of the bottom diameter shaping section are in transition arrangement, the snapping groove thread rolling teeth are cancelled, the thread rolling grooves on the two sides gradually shrink to the middle of the outer diameter shaping section towards the rear end, and the plane section of the thread rolling surface structure at the rear part of the outer diameter shaping section is formed;
the front end of the thread rolling surface of the stripping section of the stretch breaking groove thread rolling plate is in transition arrangement with the plane at the rear part of the outer diameter shaping section, and the plane is obliquely arranged towards the rear end.
And furthermore, the length of the lead-in section of the stretch breaking groove screw plate is two to five times of the circumference of the cylindrical rod of the screw rolling workpiece.
Furthermore, the length of the lead-in section of the screw plate of the stretch breaking groove is twice of the circumference of the cylindrical rod of the screw workpiece.
The length of the bottom diameter shaping section of the stretch breaking groove screw plate is two times of the circumference of the cylindrical rod of the thread rolling workpiece, the length of the outer diameter shaping section of the stretch breaking groove screw plate is two times of the circumference of the cylindrical rod of the thread rolling workpiece, and the length of the stripping section of the stretch breaking groove screw plate is one time of the diameter of the cylindrical rod of the thread rolling workpiece.
Furthermore, the included angle between the two sides of the triangular cross section of the thread rolling teeth of the stretch-breaking groove and the vertical wall of the thread rolling plate of the stretch-breaking groove is 20-35 degrees.
Furthermore, the cross section area of the thread rolling groove is not less than 80% of the cross section area of the thread rolling teeth with the same section, and the bottom of the thread rolling groove is in smooth circular arc transition. The cross section area of the thread rolling groove is at least not less than 50% of the cross section area of the thread rolling teeth with the same section.
Furthermore, the inclined opening of the stripping section of the snapping groove screw plate is an inclined opening formed by an inclined plane or a rounded structure; the included angle between the inclined plane and the thread twisting surface is not more than 10 degrees, and the fillet radius of the fillet structure is not less than the tooth height of the bottom diameter shaping section.
The ratio of the height of the thread rolling teeth of the stretch breaking groove to the width of the bottom of the teeth is 0.5-0.75.
In the conventional screw plate, because the width of the snapping groove of the narrow snapping ring groove rivet is narrow, the screw plate processed according to the shape of the narrow snapping groove has insufficient strength, is extremely easy to damage in the screw process, and the service life of the screw plate cannot meet the production requirement. By redesigning the thread rolling tooth structure, the thread rolling teeth are widened to improve the strength, the extrusion material transition accommodation space is designed, and the back pressure thread rolling structure is designed. In the thread rolling process of the stretch breaking groove thread rolling plate, extruded redundant materials are accommodated through thread rolling grooves formed in two sides of thread rolling teeth, and most of the materials temporarily accommodated in the thread rolling grooves are gradually compressed back to the stretch breaking groove through a pressure plate structure behind the thread rolling plate, so that a stretch breaking groove with extremely narrow width is formed.
In the whole thread rolling process of the thread rolling die, the locking groove thread rolling plate or the tail part slot-drawing thread rolling plate firstly cuts into the annular groove rivet workpiece to drive the workpiece to be stably pressed into the slot-drawing thread rolling plate, and the locking groove thread rolling plate and the tail part slot-drawing thread rolling plate jointly enable the workpiece to be formed on the slot-drawing thread rolling plate along with the deeper extrusion.
The utility model has the following beneficial effects: the ratio of the height of the thread rolling teeth to the width of the thread rolling teeth is set between 0.5 and 0.75, so that the structure is beneficial to the cutting of the thread rolling teeth into workpieces, has enough strength and is suitable for thread rolling of various alloys; and a groove material containing structure lower than the wire twisting surface is adopted to temporarily contain and extrude excess materials, so that the forming of the stretch-breaking groove is more stable, and a plurality of materials remained in the groove are gradually compressed back to the stretch-breaking groove by a subsequently arranged pressing plate structure, so that the stretch-breaking groove with extremely narrow width is formed. The thread rolling die has good processing performance and stability, the tool strength meets the requirement, the thread rolling die can finish the processing of three sections of tooth shapes at one time, and the processing efficiency is greatly improved.
Drawings
FIG. 1 is a schematic view of a narrow snap groove ring groove rivet made in accordance with the present invention;
FIG. 2 is a partial schematic view of a narrow snap groove ring groove rivet snap groove;
FIG. 3 is a schematic side profile view of the thread rolling die of the present invention;
FIG. 4 is a schematic end profile view of the thread rolling die of the present invention;
FIG. 5 is a schematic view of a three-dimensional structure of a screw plate of a stretch breaking groove of the thread rolling die of the present invention;
FIG. 6 is a schematic view of the surface structure of a thread rolling plate of a stretch breaking groove of the thread rolling die according to the present invention;
FIG. 7 is a schematic side view of a screw plate of a stretch breaking groove of the thread rolling die according to the present invention;
FIG. 8 is a schematic view of the thread rolling teeth of the snapping groove of the present invention;
FIG. 9 is a schematic structural view of a section B11 in FIG. 6;
FIG. 10 is a schematic structural view of the section B12 and the section B21 in FIG. 6;
FIG. 11 is a schematic structural view of a section B31 in FIG. 6;
FIG. 12 is a schematic structural view of a section B32 in FIG. 6;
in the figure, 1 is a leading-in section, 2 is a shaping section, 3 is a stripping section, 4 is a thread rolling groove, 5 is thread rolling teeth, and 6 is a thread rolling surface;
a is a locking groove screw plate, B is a breaking groove screw plate, C is a tail part pulling groove screw plate, E is an inclined included angle of a leading-in section, F is an inclined included angle of a stripping section, B1 is a breaking groove leading-in section, B2a is a bottom diameter shaping section, B2B is an outer diameter shaping section, and B3 is a breaking groove stripping section; b11, B21, B22, B31 and B32 respectively represent the cross sections of the breaking groove screw plate, a is a locking groove, B is a breaking groove, c is a tail part pulling groove, D1 is the diameter of the front end of the breaking groove, D2 is the diameter of the rear end of the breaking groove, H is the width of the breaking groove, W1 is the length of a rod at the front end of the breaking groove, W2 is the length of the rod at the rear end of the breaking groove, alpha 1 is the right included angle of a breaking groove screw thread tooth, alpha 2 is the left included angle of a breaking groove screw thread tooth, g is the height of a breaking groove screw thread tooth, and H is the width of the bottom of the breaking groove screw thread tooth.
Detailed Description
The present invention is further described below in conjunction with the following detailed description, which is intended to further illustrate the principles of the utility model and is not intended to limit the utility model in any way, but is equivalent or analogous to the present invention without departing from its scope.
With reference to the attached drawings.
The thread rolling die comprises an integral structure, a locking groove thread rolling plate A, a stretch breaking groove thread rolling plate B and a tail stretch breaking groove thread rolling plate C which are transversely arranged, as shown in figure 4, the figure 4 is a schematic diagram of the end surface outline of the thread rolling die, and the locking groove thread rolling plate A, the stretch breaking groove thread rolling plate B and the tail stretch breaking groove thread rolling plate C are sequentially of the integral structure according to the stretch breaking groove ring groove rivet thread rolling structure. As shown in fig. 3, fig. 3 is a schematic side profile view of the thread rolling die of the present invention, and the thread rolling die sequentially includes a guiding section 1, a shaping section 2, and a stripping section 3 from the front end to the rear end.
The longitudinal central line of the thread rolling surface 6 of the lead-in section of the stretch breaking groove thread rolling plate is provided with stretch breaking groove thread rolling teeth 5, the cross section of each stretch breaking groove thread rolling tooth 5 is of a triangular structure, and the included angle between two sides of each triangle and the vertical wall of the stretch breaking groove thread rolling plate is not more than 45 degrees; the two sides of the cross section triangle of the thread rolling teeth of the snapping groove can also be of an approximate triangle structure formed by a plurality of sections of arcs or arcs and straight lines, and the included angle between the tangent line or the straight line of the arc at the bottom end of each side of the approximate triangle and the vertical wall of the thread rolling plate of the snapping groove is not more than 45 degrees. The ratio of the height g of the thread rolling teeth of the snapping grooves to the width h of the bottom of the teeth is 0.5-0.75.
As shown in fig. 8, the included angles between the two triangular sides of the snap groove thread rolling teeth 5 and the vertical wall of the snap groove thread rolling plate include a right included angle α 1 of the snap groove thread rolling teeth and a left included angle α 2 of the snap groove thread rolling teeth. Thread rolling grooves 4 are formed in the thread rolling surfaces of the thread rolling plates of the stretch breaking grooves on two sides of the thread rolling teeth 5 of the stretch breaking grooves, the lead-in sections B1 of the stretch breaking grooves are obliquely arranged from the front ends to the rear ends, the inclined included angle E of the lead-in sections is not more than 2 degrees, and the thread rolling teeth 5 of the stretch breaking grooves and the thread rolling grooves 4 of the stretch breaking groove lead-in sections B1 are gradually raised relative to the thread rolling surfaces 6 from the front ends to the rear ends; the longitudinal direction is formed as the structural schematic of fig. 9.
The shaping section 2 of the breaking groove screw plate B consists of a front section bottom diameter shaping section B2a and a rear section outer diameter shaping section B2B; the bottom diameter shaping section B2a has the same structure as the rear end connecting part of the breaking groove leading-in section B1, namely, as shown in FIG. 10, the structure of the section B12 is the same as that of the section B21; the outer diameter shaping section B2B comprises a transition section and a plane section, the front end of the transition section and the tail end of the bottom diameter shaping section B2a are in transition arrangement, the stretch breaking groove thread rolling teeth 5 are eliminated, the thread rolling grooves 4 on two sides gradually shrink to the middle of the outer diameter shaping section B2B towards the rear end, and are eliminated as shown in figure 11, the thread rolling teeth 5 without the stretch breaking groove are arranged in figure 11, the thread rolling grooves 4 on two sides are combined with the thread rolling surface 6 and gradually shrink, and the plane section of the structure of the thread rolling surface 6 on the rear portion of the outer diameter shaping section B2B is formed as shown in figure 12.
The front end of the thread stripping surface 6 of the stretch breaking groove thread rolling plate stripping section B3 and the rear plane of the outer diameter shaping section B2B are arranged in a transition mode, and the plane is obliquely opened towards the rear end.
Generally, the thread rolling plates on the thread rolling equipment are divided into a movable thread rolling plate and a fixed thread rolling plate, and the design of each tooth on the movable thread rolling plate and the fixed thread rolling plate is the same as that of a product.
As shown in the figure, the movable screw plate and the fixed screw plate of the annular groove rivet screw die are composed of three sections, namely a leading-in section 1, a shaping section 2 and a stripping section 3. The snapping groove screw plate B shaping section 2 of the narrow snapping ring groove rivet is provided with two sections, namely a snapping groove bottom diameter shaping section B2a and a snapping groove outer diameter shaping section B2B, wherein the snapping groove bottom diameter shaping section B2a and the snapping groove outer diameter shaping section B2B have different functions, the bottom diameter shaping section B2a stabilizes the snapping groove bottom diameter size, and snapping performance is close to consistency through the same heat treatment process. The outer diameter shaping section B2B is characterized in that most of extrusion materials are pressed into the breaking groove again to form a very narrow breaking groove, the bottom diameter of the breaking groove is not changed, and round tables on two sides of the breaking groove are smoother.
The length of the required stretch-breaking groove screw plate B is calculated according to the maximum deformation position. The length of the breaking groove screw plate is equal to the length of a breaking groove stripping section, the length of a breaking groove leading-in section, the length of a breaking groove bottom diameter shaping section and the length of a breaking groove outer diameter shaping section.
3 length on the stripping section equals one time of work piece diameter at work piece cylinder pole shaping position, it takes off the material section and adopts hypotenuse opening design or radius design, take off the material section of taking off of material section hypotenuse opening design angle of inclination F or radius tangent line take off material section angle of inclination F and be not more than 10, preferably not more than 5, the radius design has the level and smooth, the space of deviating from of bigger increase, demold with the radius angle, radius of fillet should not be less than end footpath plastic section silk rubbing tooth height during the fillet drawing of patterns.
The leading-in section 1 is obliquely arranged at an angle, and the maximum angle of the inclination angle E of the leading-in section is not more than 2 degrees. The length of the leading-in section 1 is 2-5 times of the perimeter of a cylindrical rod of a workpiece before non-thread rolling, namely 2 pi D-5 pi D, wherein D is the diameter of the cylindrical rod of the workpiece, the length of the leading-in section 1 of the locking groove thread rolling plate A or the tail part groove drawing thread rolling plate C is not more than 2 times of the perimeter of the cylindrical rod of the workpiece at the position, namely 2 pi D, and the larger deformation amount or the longer leading-in length is required by metal which is difficult to deform.
The length of the bottom diameter shaping section is not less than 2 times of the perimeter of a cylindrical rod of the workpiece before thread rolling, namely 2 pi D; the length of the outer diameter shaping section is not less than 2 times of the perimeter of the cylindrical rod of the workpiece before thread rolling, namely 2 pi D.
And determining the thread rolling equipment suitable for installing the thread rolling die with the length according to the length design requirement of the annular groove rivet thread rolling die. Generally, a longer lead-in section 1 length of the screw plate has a better life; the longer the shaping section 2 is, the better the appearance quality of the workpiece after thread rolling is carried out, the more stable the size is, but the better the perimeter of the workpiece is not more than four times.
The utility model arranges the breaking groove thread rolling teeth 5 on the longitudinal central line of the thread rolling surface of the length of the breaking groove leading-in section B1. The snapping groove thread rolling teeth 5 can be of a triangular structure and can also be of other convex structures. The front part of the snap groove leading-in section B1 is provided with a triangular snap groove thread rolling tooth 5, the single side angle of the triangle is not more than 45 degrees, the preferred selection range is 20-35 degrees, the sharp angle of the triangle needs to be processed by a fillet, the fillet is as small as possible, and the fillet is not more than R0.2. The snapping groove thread rolling teeth 5 can also be in a semi-arc structure, namely, the tooth-shaped section is in an arc structure. The triangle is suitable for a shape structure with deeper pressing depth and smaller deformation; the arc is suitable for a shape structure with shallow pressing depth and large pressing amount.
In order to accommodate extruded materials of the rivet in the thread rolling process, the two sides of the bottom end of the thread rolling teeth 5 of the stretch breaking groove are provided with thread rolling grooves 4 of the stretch breaking groove at the rear part of the stretch breaking groove leading-in section 1. Other shaped structures may be provided to accommodate the extrusion as the die cuts into the rivet. The space that can accommodate the extrudate structure should be no less than the volume of the extrudate. The cross-sectional area of the thread rolling groove 4 is not less than 80 percent and at least not less than 50 percent of the cross-sectional area of the thread rolling teeth 5 with the same cross section. The bottom of the thread rolling groove is in smooth arc transition.
The thread rolling surface of the bottom diameter shaping section B2a of the breaking groove has no included angle with the horizontal, and a thread rolling groove 4 with a breaking groove for containing extruded materials is arranged in smooth transition with the leading-in section 1 of the breaking groove.
The length of the outer diameter shaping section B2B of the snapping groove is designed to be two parts, wherein the first part is a transition section, and the second part is a plane section. The front end face of the transition section is a stretch-breaking groove bottom diameter shaping section B2a which is consistent with a stretch-breaking groove thread rolling groove 4 for containing extruded materials and gradually transits to a complete stretch-breaking groove thread rolling surface 6. The transition section should be at least twice as long as the perimeter of the cylindrical rod of the workpiece, namely 1 pi D; the planar section should also be at least twice as long as the circumference of the cylindrical shank of the workpiece, i.e., 1 π D.
The inclination angle E of the lead-in section is as small as possible, the inclination angle E is not more than 2 degrees, preferably not more than 1 degree under the condition of meeting various parameters, and meanwhile, the lead-in section length of the locking groove screw plate A or the tail groove-drawing screw plate C is smaller than the length of the lead-in section B of the stretch breaking groove, namely, the locking groove screw plate A and the tail groove-drawing screw plate C are required to be cut into a workpiece in advance of the stretch breaking groove screw plate B; the locking groove screw plate A and the tail part groove drawing screw plate C which are cut into the workpiece firstly enable the workpiece to be stable in the direction vertical to the moving direction of the screw plates, and the workpiece can be guaranteed to roll along with the movement of the screw plates without slipping.
Claims (10)
1. A thread rolling die for manufacturing a narrow stretch-breaking groove ring groove rivet comprises an integral structure, a locking groove thread rolling plate, a stretch-breaking groove thread rolling plate and a tail stretch-breaking groove thread rolling plate which are transversely arranged, wherein each thread rolling plate of the thread rolling die is sequentially provided with a leading-in section, a shaping section and a stripping section from the front end to the rear end; the method is characterized in that:
the longitudinal middle part of the thread rolling surface of the lead-in section of the thread rolling plate with the stretch breaking groove is provided with thread rolling teeth with the stretch breaking groove, the cross section of the thread rolling teeth with the stretch breaking groove is of a triangular structure, and the included angle between two sides of the triangle and the vertical wall of the thread rolling plate with the stretch breaking groove is not more than 45 degrees; thread rolling grooves are formed in the thread rolling surfaces of the thread rolling plates of the stretch-breaking grooves on the two sides of the thread rolling teeth; the leading-in section is obliquely arranged from the front end to the rear end, the angle of the inclination angle of the leading-in section is not more than 2 degrees, and the thread rolling teeth and the thread rolling grooves which form the leading-in section are gradually increased relative to the thread rolling surface from the front end to the rear end;
the shaping section of the breaking groove screw plate consists of a front section bottom diameter shaping section and a rear section outer diameter shaping section; the bottom diameter shaping section has the same structure as the connecting part at the rear end of the guide-in section of the snapping groove screw plate; the outer diameter shaping section comprises a transition section and a plane section, the front end of the transition section and the tail end of the bottom diameter shaping section are in transition arrangement, the snapping groove thread rolling teeth are cancelled, the thread rolling grooves on the two sides gradually shrink to the middle of the outer diameter shaping section towards the rear end, and the plane section of the thread rolling surface structure at the rear part of the outer diameter shaping section is formed;
the front end of the thread rolling surface of the stripping section of the stretch breaking groove thread rolling plate is in transition arrangement with the plane at the rear part of the outer diameter shaping section, and the plane is obliquely arranged towards the rear end.
2. The thread rolling die for manufacturing the narrow snap groove ring groove rivet according to claim 1, characterized in that: the length of the lead-in section of the stretch breaking groove thread rolling plate is two to five times of the circumference of a cylindrical rod of the thread rolling workpiece.
3. The thread rolling die for manufacturing the narrow snap groove ring groove rivet according to claim 2, characterized in that: the length of the lead-in section of the screw plate of the stretch breaking groove is twice of the circumference of a cylindrical rod of the screw workpiece.
4. The thread rolling die for manufacturing the narrow snap groove ring groove rivet according to claim 1, characterized in that: the length of the bottom diameter shaping section of the stretch breaking groove screw plate is twice of the perimeter of the cylindrical rod of the thread rolling workpiece, the length of the outer diameter shaping section of the stretch breaking groove screw plate is twice of the perimeter of the cylindrical rod of the thread rolling workpiece, and the lengths of the transition section and the plane section of the outer diameter shaping section are both twice of the perimeter of the cylindrical rod of the thread rolling workpiece.
5. The thread rolling die for manufacturing the narrow snap groove ring groove rivet according to claim 1, characterized in that: the stripping section length of the stretch breaking groove screw plate is one time of the diameter of the cylindrical rod of the thread rolling workpiece.
6. The thread rolling die for manufacturing the narrow snap groove ring groove rivet according to claim 1, characterized in that: the included angle between the two sides of the triangular cross section of the screw rolling teeth of the breaking groove and the vertical wall of the screw rolling plate of the breaking groove is 20-35 degrees.
7. The thread rolling die for manufacturing the narrow snap groove ring groove rivet according to claim 1, characterized in that: the cross section area of the thread rolling groove is not less than 80% of the cross section area of the thread rolling teeth with the same section, and the bottom of the thread rolling groove is in smooth circular arc transition.
8. The thread rolling die for manufacturing the narrow snap groove ring groove rivet according to claim 7, wherein: the cross section area of the thread rolling groove is not less than 50% of the cross section area of the thread rolling teeth with the same section.
9. The thread rolling die for manufacturing the narrow snap groove ring groove rivet according to claim 1, characterized in that: the inclined opening of the stripping section of the stretch breaking groove screw plate is an inclined opening formed by an inclined plane or a rounded structure; the included angle between the inclined plane and the thread twisting surface is not more than 10 degrees, and the fillet radius of the fillet structure is not less than the tooth height of the bottom diameter shaping section.
10. The thread rolling die for manufacturing the narrow snap groove ring groove rivet according to claim 1, characterized in that: the ratio of the height of the thread rolling teeth of the stretch breaking groove to the width of the bottom of the teeth is 0.5-0.75.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122788390.1U CN216324864U (en) | 2021-11-15 | 2021-11-15 | Thread rolling die for manufacturing narrow snapping groove ring groove rivet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122788390.1U CN216324864U (en) | 2021-11-15 | 2021-11-15 | Thread rolling die for manufacturing narrow snapping groove ring groove rivet |
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| Publication Number | Publication Date |
|---|---|
| CN216324864U true CN216324864U (en) | 2022-04-19 |
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| CN202122788390.1U Active CN216324864U (en) | 2021-11-15 | 2021-11-15 | Thread rolling die for manufacturing narrow snapping groove ring groove rivet |
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| CN (1) | CN216324864U (en) |
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